Stylus, antenna module, touch sensor, and electronic device

Abstract

An electronic device according to an embodiment includes a loop coil, a display unit including a plurality of pixels, a display driver to apply a data signal and a scan signal to the plurality of pixels according to a vertical synchronization signal and a horizontal synchronization signal, a plurality of touch electrodes located on the display unit, a drive receiver to apply a drive signal to the loop coil during a first period and to receive a sense signal from at least one of the plurality of touch electrodes during a second period after the first period, and a controller to generate touch information by using the sense signal, wherein the drive signal is synchronized with a pulse of at least one of the vertical synchronization signal and the horizontal synchronization signal.

Description

Technical Field

[0001] The present invention relates to a stylus pen, an antenna module, a touch sensor and an electronic device. Background Art

[0002] Touch sensors are provided in various electronic devices such as mobile phones, smartphones, laptop computers, digital broadcast terminals, personal digital assistants, portable multimedia players, navigation devices, tablet computers (slate PCs or tablet PCs), ultrabooks, wearable devices, head-mounted displays, etc.

[0003] In such an electronic device, the touch sensor may be provided on a display panel that displays an image, or may be provided in a portion of the electronic device. When a user interacts with the electronic device by touching the touch sensor, the electronic device may provide the user with an intuitive user interface.

[0004] Users can use the stylus to perform complex touch input. Depending on whether a battery and electronic components are provided therein, the stylus can be classified into an active stylus and a passive stylus.

[0005] Active styluses offer basic performance advantages over passive styluses, with the advantage of providing additional functionality (pen pressure, hovering, and buttons), but the disadvantage of being difficult to use while charging the battery.

[0006] Compared with active styluses, passive styluses are inexpensive and do not require batteries, but touch recognition is difficult compared with active styluses.

[0007] Specifically, in the case of an electromagnetic resonance (EMR) type pen among passive styluses, the digitizer transmits an electromagnetic signal to the pen, and then the digitizer receives the resonant signal from the pen. That is, since the signal is sent and received only through the digitizer, the signal transmission and signal reception cannot be performed simultaneously, thus posing the problem of needing to perform the signal transmission and signal reception in a time-division manner. Similarly, in the case of an electrically coupled resonance (ECR) type pen among passive styluses, the touch electrode transmits an electromagnetic signal to the pen, and then the touch electrode receives the resonant signal from the pen. That is, since the signal is sent and received only through the touch electrode, the signal transmission and signal reception cannot be performed simultaneously, thus posing the problem of needing to perform the signal transmission and signal reception in a time-division manner.

[0008] Furthermore, noise exists in electronic devices for various reasons and can degrade the sensing performance of the electronic devices. In particular, in the case of a stylus, the presence of noise in a frequency band similar to the resonant frequency of the stylus can significantly reduce the accuracy of touch sensing.

[0009] Furthermore, the touch sensor is susceptible to noise having a frequency similar to a resonant frequency according to the design of a resonant circuit embedded in the stylus. Summary of the Invention

[0010] Technical issues

[0011] Embodiments have been made in an effort to provide an antenna module for reducing noise of a touch signal and an electronic device including the antenna module.

[0012] The embodiments are made in an effort to provide an antenna module that can be implemented on one layer and an electronic device including the antenna module.

[0013] The embodiments are made in an effort to provide an antenna module capable of improving touch sensing performance of a stylus pen and an electronic device including the antenna module.

[0014] The embodiments are made in an attempt to provide a foldable electronic device that is easy to use with a stylus pen and a driving method thereof.

[0015] The embodiments are made in an attempt to provide a foldable electronic device and a driving method thereof capable of improving the touch sensing performance of a stylus pen.

[0016] The embodiments are made in an effort to provide an antenna module driven with a relatively small current and an electronic device including the antenna module.

[0017] The embodiments have been made in an effort to provide an antenna module capable of reducing power consumption and an electronic device including the antenna module.

[0018] Embodiments have been made in an effort to provide an antenna module capable of wireless charging without a separate wireless charging module, and an electronic device including the antenna module.

[0019] The embodiments have been made in an effort to provide an electronic device that amplifies a magnetic field generated in a coil using the same voltage, and a control method thereof.

[0020] The embodiments have been made in an effort to provide an electronic device for preventing noise caused by a display panel and a control method thereof.

[0021] The embodiments have been made in an effort to provide an electronic device and a touch detection method thereof, which are capable of improving touch sensing performance of a stylus pen in an environment where noise in a frequency band similar to a resonance signal of the stylus pen exists.

[0022] Embodiments have been made in an attempt to provide a stylus that can generate a sufficient resonance signal.

[0023] Embodiments have been made in an effort to provide a stylus that transmits a signal having an appropriate amplitude to a touch sensor.

[0024] Embodiments are made in an attempt to provide a stylus that can maintain a resonant frequency.

[0025] Embodiments have been made in an effort to provide a stylus having multiple resonance frequencies, and a touch sensor and an electronic device for receiving a signal with reduced noise by using the stylus.

[0026] Embodiments have been made in an effort to provide a stylus pen, an electronic device, and an input system that can be wirelessly charged during use of the stylus pen.

[0027] The embodiments are made in an effort to provide a stylus pen, an electronic device, and an input system that can be wirelessly charged without a separate wireless charging module.

[0028] The embodiments are made in an effort to provide a stylus pen, an electronic device, and an input system capable of touch input and sensor input.

[0029] The embodiments are made in an effort to provide a stylus pen, an electronic device, and an input system that are capable of changing a resonant frequency.

[0030] The embodiments are made in an effort to provide a stylus pen, electronic device, and input system that are capable of communicating using commercial communication protocols.

[0031] Embodiments have been made in an attempt to provide a stylus that can be wirelessly charged with maximum efficiency.

[0032] Technical Solution

[0033] One embodiment of the present invention provides a display device, comprising: a plurality of antenna loops formed on a substrate and spaced apart from each other, wherein each antenna loop includes a first antenna loop connecting a first pad and a second pad and a second antenna loop connecting a third pad and a fourth pad on the substrate; and a flexible circuit board electrically connected to the first pad to the fourth pad, wherein the flexible circuit board includes a connecting wire connecting the second pad and the third pad to each other, and a coil driver applying a driving signal to the first pad and the second pad.

[0034] One embodiment of the present invention provides a foldable electronic device, comprising: a touch sensor; and a toroidal coil located below the touch sensor, wherein the toroidal coil includes a ferrite sheet located in an area other than a folding area that forms a curved surface in a folded state, and an antenna ring located on the ferrite sheet.

[0035] One embodiment of the present invention provides an electronic device including: a resonant circuit configured to include a toroidal coil and a capacitor connected in parallel with the toroidal coil; a blocking capacitor connected in series with the resonant circuit; and a power supply configured to transmit a driving signal of a predetermined frequency to the blocking capacitor.

[0036] An embodiment of the present invention provides an electronic device including: a toroidal coil; and a coil driver configured to apply a driving signal of a predetermined frequency to both ends of the toroidal coil, and the coil driver applies driving signals having opposite phases to both ends of the toroidal coil.

[0037] An embodiment of the present invention provides an electronic device including: a touch sensor configured to include touch electrodes; and a loop coil configured to have different winding pitches corresponding to the arrangement of the touch electrodes.

[0038] One embodiment of the present invention provides an electronic device, comprising: a ring-shaped coil; a touch panel configured to include a plurality of first touch electrodes arranged in a first direction and a plurality of second electrodes arranged in a second direction intersecting the first direction; a coil driver configured to apply a coil drive signal to the ring-shaped coil; a driver / receiver configured to apply a drive signal to the plurality of first touch electrodes and the plurality of second touch electrodes and to receive a sensing signal from the first touch electrodes and the second touch electrodes; and a controller configured to control the coil driver based on the sensing signal output from the receiver to change the duration of operation of the coil driver.

[0039] One embodiment of the present invention provides an electronic device, comprising: a ring coil; a display unit configured to include a plurality of pixels; a display driver configured to apply a data signal and a scan signal to the pixels according to a vertical synchronization signal and a horizontal synchronization signal; a plurality of touch electrodes located on the display unit; a drive receiver configured to apply a drive signal to the ring coil during a first time period and receive a sensing signal from at least one of the touch electrodes during a second time period after the first time period; and a controller configured to generate touch information by using the sensing signal, wherein the drive signal is synchronized with at least one pulse of the vertical synchronization signal and the horizontal synchronization signal.

[0040] The driving receiver may receive the sensing signal in synchronization with a pulse of the horizontal synchronization signal.

[0041] The controller generates touch information by using some of the sensing signals received during a sensing period determined in response to a horizontal synchronization signal.

[0042] The controller determines the following period as the sensing period: the period from the moment when the pulse of the horizontal synchronization signal is generated to the predetermined second moment excluding the period from the moment when the pulse of the horizontal synchronization signal is generated to the predetermined first moment, and the predetermined second moment may exceed the predetermined first moment.

[0043] The controller may determine a period excluding a period in which a scan signal applied to one of the pixels is at an enable level as the sensing period.

[0044] The controller may determine a period excluding a period in which a data signal is applied to one of the pixels as the sensing period.

[0045] The driving receiver may receive the sensing signal at two moments with opposite phases within one frequency cycle of the driving signal.

[0046] The controller may generate touch information by using a difference between the sensing signals received at the two moments.

[0047] The display driver may further apply an emission control signal for controlling the pixels to emit light, and the two times may be within a period excluding a time at which the emission control signal applied to one of the pixels transitions to an enable level.

[0048] The frequency of the driving signal may be an integer multiple of the frequency of the horizontal synchronization signal, where the integer is greater than or equal to 2.

[0049] A touch device on a display, the display displaying an image of one frame by applying a scan signal and a data signal to a plurality of pixels according to a vertical synchronization signal and a horizontal synchronization signal, the touch device comprising: a touch sensor unit configured to include a plurality of electrodes; a driver / receiver configured to apply a drive signal to at least one of the electrodes during a first period, and to receive a sensing signal from at least one of the electrodes during a second period following the first period, the sensing signal having a predetermined phase difference from the drive signal; and a controller configured to generate touch information by using the sensing signal, wherein the drive signal is synchronized with at least one pulse of the vertical synchronization signal and the horizontal synchronization signal.

[0050] The driving receiver may receive the sensing signal in synchronization with a pulse of the horizontal synchronization signal.

[0051] The controller may generate touch information by using some of the sensing signals received during a sensing period determined in response to the horizontal synchronization signal.

[0052] The controller determines the following period as the sensing period: the period from the moment when the pulse of the horizontal synchronization signal is generated to the predetermined second moment excluding the period from the moment when the pulse of the horizontal synchronization signal is generated to the predetermined first moment, and the predetermined second moment may exceed the predetermined first moment.

[0053] The controller may determine a period excluding a period in which a scan signal applied to one of the pixels is at an enable level as the sensing period.

[0054] The controller may determine a period excluding a period in which a data signal is applied to one of the pixels as the sensing period.

[0055] The driving receiver may receive the sensing signal at two moments with opposite phases within one frequency cycle of the driving signal.

[0056] The controller may generate touch information by using a difference between sensing signals received at two moments.

[0057] The frequency of the driving signal may be an integer multiple of the frequency of the horizontal synchronization signal, where the integer is greater than or equal to 2.

[0058] One embodiment of the present invention provides a touch system, comprising: a stylus configured to include a resonant circuit; a display configured to include a display unit and a display driver, the display unit configured to include a plurality of pixels, the display driver configured to apply a data signal and a scan signal to the pixels according to a vertical synchronization signal and a horizontal synchronization signal; a plurality of touch electrodes located on the display unit; a drive receiver configured to apply a drive signal to a ring coil during a first period and receive a sensing signal from at least one of the touch electrodes during a second period following the first period; and a controller configured to generate touch information by using the sensing signal, wherein the drive signal is synchronized with at least one pulse of the vertical synchronization signal and the horizontal synchronization signal.

[0059] One embodiment of the present invention provides a display device including: a toroidal coil; a coil driver configured to apply a driving signal of a predetermined frequency to the toroidal coil; touch electrodes; and a touch driver configured to receive a sensing signal from the touch electrodes, wherein the touch driver receives the sensing signal during a period when the driving signal is not applied.

[0060] One embodiment of the present invention provides a display device, which includes: a toroidal coil; a touch panel configured to include a plurality of touch electrodes; and a driver / receiver configured to apply a drive signal having a frequency corresponding to a resonant frequency of a stylus to the toroidal coil, and receive a sensing signal from the touch electrode, wherein the drive signal may include a first drive signal and a second drive signal having a different phase from the first drive signal.

[0061] One embodiment of the present invention provides a stylus including: a main body; a conductive tip configured to be exposed from the inside of the main body to the outside of the main body; a ferrite core located in the main body; an inductor portion configured to include a coil connected to the conductive tip and wound multiple layers around at least a portion of the ferrite core; and a capacitor portion located in the main body and electrically connected to the inductor portion to form a resonant circuit.

[0062] One embodiment of the present invention provides a stylus pen comprising: a housing; a conductive tip configured to be at least partially exposed to the outside of the housing; a resonant circuit located in the housing for resonating with a magnetic signal; and a conductive blocking member positioned to correspond to the portion of the housing where the conductive tip is exposed to the outside.

[0063] One embodiment of the present invention provides a stylus pen, comprising: a main body; a conductive tip configured to be exposed from the inside of the main body to the outside of the main body; a ground portion configured to be electrically connected to a user; and a resonant circuit portion located in the main body, the resonant circuit portion being electrically connected between the conductive tip and the ground portion and comprising one or more resonant circuits that resonate with electromagnetic signals of different frequencies transmitted from the main body to output resonant signals of different frequencies.

[0064] One embodiment of the present invention provides a stylus including: a sensor configured to sense an external input; a resonant circuit; and a controller configured to receive power from the resonant circuit and control a resonant signal generated in the resonant circuit according to a sensed value of the sensor.

[0065] One embodiment of the present invention provides a stylus including: a resonant circuit; an inductor coupled to the resonant circuit through mutual inductance; and an active module coupled to the inductor.

[0066] Beneficial effects

[0067] According to the embodiment, there is an advantage in that the manufacturing costs of the antenna module and the electronic device including the same can be reduced.

[0068] According to the embodiment, there is an advantage in that a thinner and smaller form factor can be provided.

[0069] This has the following advantages: the signal-to-noise ratio (SNR) of the signal output from the stylus is improved.

[0070] According to the embodiment, the reception sensitivity of the touch input can be improved.

[0071] According to an embodiment, a touch position can be accurately calculated.

[0072] According to the embodiment, there is an advantage in that palm rejection can be performed.

[0073] According to the embodiment, there is an advantage in that power consumption of an antenna module and an electronic device including the antenna module can be reduced.

[0074] According to the embodiment, there is an advantage in that the energy transmitted to the stylus is improved.

[0075] According to the embodiment, there is an advantage in that power required for using the stylus pen can be transmitted while using the stylus pen without requiring separate wireless charging.

[0076] According to the embodiment, there is an advantage in that the manufacturing costs of the antenna module and the electronic device including the same can be reduced.

[0077] According to the embodiment, there is an advantage in that the energy consumption of the touch sensor can be reduced by reducing the energy consumption during a period in which a driving signal is output to the touch sensor for resonance of the stylus.

[0078] According to the embodiment, there is an advantage in that the touch sensing performance of the stylus pen can be improved in an environment where noise in a frequency band similar to a resonance signal of the stylus pen exists.

[0079] According to the embodiment, there is an advantage in that a sufficient output signal can be generated even with a thin diameter by proposing a structure of an optimal resonant circuit of the stylus.

[0080] According to at least one embodiment of the present invention, a stylus pen that prevents unintentional touch input can be provided.

[0081] According to the embodiment, there is an advantage in that a stylus pen robust against external factors can be provided.

[0082] According to an embodiment, there is an advantage in that an additional input by a user using a stylus pen is detected.

[0083] According to the embodiment, there is an advantage of wirelessly charging the stylus pen in use.

[0084] According to the embodiment, there is an advantage in that the stylus pen can be charged more quickly.

[0085] According to the embodiment, there is an advantage in that power consumption for charging the stylus pen is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] Figure 1 A schematic diagram showing a stylus and an electronic device is shown.

[0087] Figure 2 A block diagram schematically showing an electronic device is shown.

[0088] Figure 3 A stylus according to an embodiment is shown.

[0089] Figure 4 FIG. 1 shows a case where a stylus pen is used on an electronic device according to an embodiment.

[0090] Figure 5 An example in which an antenna pattern is implemented on one surface of a substrate is shown.

[0091] Figures 6 to 11 Each shows a schematic circuit diagram of a display stylus and an electronic device.

[0092] Figures 12 to 14 Partial views showing an antenna module and an electronic device including the antenna module according to a first embodiment are shown.

[0093] Figure 15 and Figure 16 Partial views showing an antenna module and an electronic device including the antenna module according to a second embodiment are shown.

[0094] Figure 17 and Figure 18 Partial views showing an antenna module and an electronic device including the antenna module according to a third embodiment are shown.

[0095] Figure 19 and Figure 20 Partial views showing an antenna module and an electronic device including the antenna module according to a fourth embodiment are shown.

[0096] Figure 21 and Figure 22 Partial views showing an antenna module and an electronic device including the antenna module according to a fifth embodiment are shown.

[0097] Figure 23 A schematic diagram showing a stylus and a portable electronic device is shown.

[0098] Figure 24 and Figure 25 A case where a stylus according to a conventional method is used on a foldable electronic device is shown.

[0099] Figure 26 and Figure 27 A foldable electronic device according to an embodiment is shown.

[0100] Figures 28 to 33 A view showing an arrangement of a touch panel and a loop coil according to various aspects of an embodiment is shown.

[0101] Figure 34 A portion of a touch module according to an embodiment is schematically shown.

[0102] Figure 35 1 shows a driving signal of a loop coil and a resonance signal of a stylus according to an embodiment.

[0103] Figure 36 and Figure 37 A foldable electronic device according to another embodiment is shown.

[0104] Figures 38 to 41 A view showing an arrangement of a touch panel and a loop coil according to aspects of another embodiment is shown.

[0105] Figure 42 A portion of a touch module according to an embodiment is schematically shown.

[0106] Figure 43 Schematic diagram showing situations where a stylus pen approaches various positions of a foldable electronic device according to another embodiment.

[0107] Figure 44 A driving signal of the loop coil and a resonance signal of the stylus according to the position of the stylus are shown.

[0108] Figures 45 to 47 Schematically shows that when applying Figure 44 The magnetic field generated when the driving signal is

[0109] Figure 48 and Figure 49 Each shows the arrangement of a touch panel and a loop coil.

[0110] Figure 50 Shown in more detail Figure 48 The arrangement of the touch panel and the toroidal coil.

[0111] Figures 51 to 55 A view showing an arrangement of a touch panel and a loop coil according to various aspects of an embodiment is shown.

[0112] Figure 56 Graphs comparing touch signals and noise signals according to an example and a comparative example are shown.

[0113] Figures 57 to 60 A view showing an arrangement of a touch panel and a loop coil according to aspects of another embodiment is shown.

[0114] Figure 61 and Figure 62 Each shows a schematic circuit diagram of a display stylus and an electronic device.

[0115] Figure 63 An antenna module and a stylus according to an embodiment are shown.

[0116] Figure 64 The driving signal applied by the coil driver to the toroidal coil and the resonant signal of the stylus are shown.

[0117] Figure 65 1 and 2 illustrate a driving signal applied by a coil driver to a loop coil and a resonance signal of a stylus according to an embodiment.

[0118] Figure 66 Specifically shown Figure 65 Coil driver.

[0119] Figures 67 to 69 Each shows the arrangement of a touch sensor and a loop coil.

[0120] Figures 70 to 74 Each shows a state where the stylus pen is close to the electronic device.

[0121] Figure 75 and Figure 76 Each shows a state in which the stylus pen approaches the electronic device to send and receive signals.

[0122] Figure 77 Shown specifically Figure 3 stylus and Figure 2 Schematic diagram of the electronic device.

[0123] Figure 78 Shown specifically Figure 77 Schematic diagram of the inductor portion of the stylus.

[0124] Figure 79 The inductance and Q value are shown as a function of frequency.

[0125] Figure 80 and Figure 81 Enameled wire and stranded wire are shown separately.

[0126] Figure 82 A multi-layer winding scheme is shown.

[0127] Figures 83 to 85 A graph showing the results of a comparative experiment is shown.

[0128] Figure 86 Shown Figure 77 Another example of the inductor portion of a stylus.

[0129] Figure 87 and Figure 88 A graph showing the amplitude of a resonance signal according to the structure of the inductor part is shown.

[0130] Figure 89 and Figure 90 Other examples of resonant circuits are shown.

[0131] Figure 91 Touch input generated by hovering the stylus is shown.

[0132] Figure 92 A schematic diagram showing a stylus and an electronic device when the stylus is held in hand is shown.

[0133] Figure 93 and Figure 94 Each shows a schematic circuit diagram showing a stylus and an electronic device when the stylus is held in hand.

[0134] Figure 95 A schematic diagram of a stylus is shown.

[0135] Figure 96 Shows the display Figure 95 An example diagram of eddy currents generated in a stylus is shown in FIG.

[0136] Figures 97 to 105 Schematic diagrams showing the structure of a stylus according to various embodiments are shown.

[0137] Figure 106 and Figure 107 Schematic diagrams showing the structure of a blocking member of a stylus pen according to various embodiments are illustrated.

[0138] Figure 108 Touch input generated by hovering a stylus according to various embodiments is shown.

[0139] Figures 109 to 111 Schematic diagrams showing the structure of a main body of a stylus pen according to various embodiments are shown.

[0140] Figure 112 A schematic diagram of a stylus showing the LLC structure is shown.

[0141] Figure 113 Various examples of blocking members are shown.

[0142] Figure 114 FIG2 schematically shows a driving sequence of a touch sensor according to an embodiment.

[0143] Figures 115 to 118 Driving timings of a touch sensor according to various embodiments are shown.

[0144] Figures 119 to 124 Waveform diagrams showing driving signals according to various aspects of an embodiment are shown.

[0145] Figure 125 A flowchart showing a method of driving an electronic device according to an embodiment is shown.

[0146] Figure 126 Shows the display according to Figure 125 1 is a timing diagram of an example of a horizontal synchronization signal Hsync and a driving signal according to a driving method.

[0147] Figure 127 Shown schematically Figure 2 A block diagram of an aspect of a display unit.

[0148] Figure 128 Shown Figure 127 The pixels of the display unit.

[0149] Figure 129 shows the display for driving Figure 127 FIG. 1 is a timing diagram of an example of a driving signal of a display unit.

[0150] Figure 130 and Figure 131 Each shows an electronic device according to an embodiment of the present invention. Figure 125 The timing diagram of the driving method receiving the sensing signal, wherein Figure 126 The display unit receives the sensing signal in synchronization with the horizontal synchronization signal.

[0151] Figure 132 Shown schematically Figure 2 A block diagram of another aspect of the display unit.

[0152] Figure 133 Shown Figure 132 The pixels of the display unit.

[0153] Figure 134 An electronic device according to an embodiment of the present invention is shown. Figure 125 The timing diagram of the driving method receiving the sensing signal, wherein Figure 132 The display unit receives the sensing signal in synchronization with the horizontal synchronization signal.

[0154] Figure 135 A flowchart showing a method of controlling an electronic device according to another embodiment is shown.

[0155] Figure 136 An arrangement of a touch panel and a loop coil of an electronic device according to an embodiment is shown.

[0156] Figure 137 A driving signal applied by a coil driver to a loop coil and a resonance signal of a stylus are shown according to one aspect.

[0157] Figure 138 A drive signal applied by a coil driver to a loop coil and a resonance signal of a stylus according to another aspect are shown.

[0158] Figure 139 A diagram for describing the influence of noise on the touch sensing performance of a touch sensor is shown.

[0159] Figure 140 A flow chart of a touch detection method according to an embodiment is shown.

[0160] Figure 141 Shown for describing Figure 140 A view of a method for filtering out noise in a touch detection method.

[0161] Figures 142 to 145 Waveform diagrams showing an example in which a touch sensor outputs a first driving signal and a second driving signal having different phases are respectively shown.

[0162] Figure 146 An equivalent circuit diagram showing a stylus pen and a touch sensor receiving a sensing signal is shown.

[0163] Figure 147 A schematic diagram showing a stylus according to an embodiment is shown.

[0164] Figure 148 A schematic diagram showing a stylus including resonant circuits that resonate with driving signals having different frequencies, respectively, is shown.

[0165] Figure 149 A flowchart showing a method of controlling an electronic device according to another embodiment is shown.

[0166] Figure 150 Shows the display according to Figure 149 An exemplary waveform diagram of a driving signal and a resonance signal of a control method of an electronic device is provided.

[0167] Figure 151 A flowchart showing a method of controlling an electronic device according to another embodiment is shown.

[0168] Figure 152 Shows the display according to Figure 151 A waveform diagram of an example of a driving signal of a control method of an electronic device.

[0169] Figures 153 to 158 Each shows a schematic circuit diagram of a display stylus and an electronic device.

[0170] Figure 159 A stylus and an electronic device according to an embodiment are partially shown.

[0171] Figure 160 A flow chart showing sensor input operations of a stylus pen and an electronic device according to an embodiment is shown.

[0172] Figure 161 Shows the display according to Figure 160 1 is a waveform diagram of an example of a driving signal and a resonance signal.

[0173] Figure 162 A flow chart showing an operation of changing a resonance frequency of a stylus pen and an electronic device according to an embodiment is shown.

[0174] Figure 163 Shows the display according to Figure 162 1 is a waveform diagram of an example of a driving signal and a resonance signal.

[0175] Figure 164 A stylus and an electronic device according to an embodiment are partially shown.

[0176] Figure 165 A flow chart showing sensor input operations of a stylus pen and an electronic device according to another embodiment is shown.

[0177] Figure 166 A flowchart showing an operation of changing a resonance frequency of a stylus pen and an electronic device according to another embodiment is shown.

[0178] Figure 167 and Figure 168 A schematic circuit diagram showing the display stylus and electronics is shown.

[0179] Figure 169 and Figure 170 Schematically shows Figure 168 stylus.

[0180] Figure 171 A schematic circuit diagram showing a stylus and an electronic device according to an embodiment is shown.

[0181] Figure 172 and Figure 173 Schematically shows Figure 171 stylus.

[0182] Figures 174 to 176 A stylus and an electronic device according to various aspects of an embodiment are partially shown.

[0183] Figure 177 Shows a block diagram of the display touch module and host.

[0184] Figure 178 An example of touch data provided from a touch module to a host is shown. DETAILED DESCRIPTION

[0185] Hereinafter, various embodiments of the present application will be described with reference to the accompanying drawings. However, it is not intended to limit the technology described herein to specific embodiments, but should be understood to include various modifications, equivalents and / or alternatives of the embodiments of the present application. In conjunction with the description of the drawings, similar reference numerals may be used for similar components.

[0186] In addition, since the sizes and thicknesses of the components shown in the drawings are arbitrarily given for better understanding and ease of description, the present invention is not limited to the sizes and thicknesses shown. In the drawings, the thicknesses of layers, films, panels, regions, etc. are exaggerated for clarity. In the drawings, the thicknesses of some layers and regions are exaggerated for better understanding and ease of description.

[0187] It should be understood that when an element, such as a layer, film, region, or substrate, is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements. Furthermore, in this specification, "on" or "above" refers to being above or below a target portion and does not necessarily mean being on the upper side of the target portion based on the direction of gravity.

[0188] In this document, expressions such as “have”, “may have”, “include” or “may include” mean that corresponding features (eg, values, functions, operations or components such as parts) exist, and do not exclude the existence of additional features.

[0189] As used herein, expressions such as "A or B," "at least one of A and / or B," or "one or more of A and / or B" may include all possible combinations of the items listed together. For example, "A or B," "at least one of A and B," or "at least one of A or B" means: (1) at least A; (2) at least B; or (3) all cases of at least A and at least B.

[0190] As used herein, expressions such as "first" or "second" may modify various elements, regardless of order and / or importance, and may modify one element to another element. These expressions are used solely to distinguish components and do not limit these components. For example, a first user device and a second user device may represent different user devices, regardless of order or importance. For example, a first component may be referred to as a second component, and similarly, a second component may be renamed as a first component without departing from the scope of the rights described herein.

[0191] When one component (e.g., a first component) is “coupled or connected” / “coupled or connected” (operably or communicatively) to another component (e.g., a second component), it should be understood that one component may be directly connected to the other component or connected to the other component through another component (e.g., a third component). When one component (e.g., a first component) is directly “coupled or connected” / “coupled or connected” to another component (e.g., a second component), it should be understood that there is no other component (e.g., a third component) between the one component and the other component.

[0192] As used herein, the expression "configured to (or configured to)" depends on the specific context, for example, "suitable for," "capable of," "designed to," "applicable to," "for use in," or "capable of" may be used interchangeably. The term "configured to" does not necessarily mean "specially designed to" in hardware. Rather, in some cases, the expression "a device configured to..." may mean that the device, together with other devices or components, is "capable of..." For example, the phrase "a processor configured to (or configured to perform) A, B, and C" may mean a general-purpose processor (e.g., a CPU or application processor) that is capable of performing the corresponding operations by executing one or more software programs, which are stored in a dedicated processor (e.g., an embedded processor) or a storage device for performing the corresponding operations.

[0193] The terms used herein are only used to describe specific embodiments and are not intended to limit the scope of other embodiments. Unless the context clearly indicates otherwise, the singular form should include the plural form. The terms used herein, including technical or scientific terms, can have the same meanings as those generally understood by those of ordinary skill in the art described herein. Among the terms used in this article, the terms defined in general dictionaries can be interpreted as having the same or similar meanings as those in the context of the relevant technology, and unless clearly defined herein, should not be interpreted as ideal or overly formal understandings. In some cases, even the terms defined in this article may not be interpreted as excluding the embodiments of this article.

[0194] The electronic device according to various embodiments of the present invention may include, for example, at least one of a smartphone, a tablet personal computer, a mobile phone, a video phone and an e-book reader, a laptop personal computer (PC), a netbook computer, a mobile medical device, a camera, or a wearable device. According to various embodiments, the wearable device may include at least one of an accessory type (e.g., a watch, a ring, a bracelet, an anklet, a necklace, glasses, contact lenses, or a head-mounted device (HMD)), (e.g., a skin pad or a tattoo), or a biological implant (e.g., an implantable circuit).

[0195] Hereinafter, electronic devices and driving methods thereof according to embodiments will be described with reference to necessary drawings.

[0196] Figure 1 shows a schematic diagram showing a stylus and an electronic device, Figure 2 shows a block diagram schematically showing an electronic device, Figure 3 A stylus according to an embodiment is shown.

[0197] like Figure 1 As shown, the stylus pen 10 can receive signals output from the electronic device 2 near its touch screen 20 or the touch screen 20 , and can send signals to the touch screen 20 .

[0198] The electronic device 2 may include a wireless communication unit 210 , a memory 220 , an interface unit 230 , a power supply unit 240 , a display unit 250 , a touch module 260 , a controller 270 , and the like. Figure 2 The constituent elements shown in the figure are not essential for realizing the electronic device, and thus the electronic device described in this application may include more or less constituent elements than the constituent elements listed above.

[0199] Specifically, among these constituent elements, the wireless communication unit 210 may include at least one module that enables wireless communication between the electronic device 2 and a wireless communication system, between the electronic device 2 and another electronic device 2, or between the electronic device 2 and an external server. In addition, the wireless communication unit 210 may include at least one module for connecting the electronic device 2 to at least one network.

[0200] The wireless communication unit 210 may include a wireless Internet module 211 and a short-range communication module 212 .

[0201] The wireless Internet module 211 refers to a module for performing wireless Internet connection and can be embedded in the electronic device 2. The wireless Internet module 211 is configured to send and receive wireless signals in a communication network according to wireless Internet technology. The wireless Internet module 211 transmits and receives wireless signals in a communication network according to wireless Internet technology. Examples of wireless Internet technologies include wireless local area network (WLAN), wireless fidelity (Wi-Fi), Wi-Fi Direct (direct connection), Digital Living Network Alliance (DLNA), wireless broadband (WiBro), world interoperability for microwave access (WiMAX), high speed downlink packet access (HSDPA), high speed uplink packet access (HSUPA), new radio (NR), long term evolution (LTE) and advanced long term evolution (LTE-A), and the wireless Internet module 211 transmits and receives data according to at least one wireless Internet technology within a range including Internet technologies not listed above.

[0202] The short-range communication module 212 is used for short-range communication and can communicate by using Bluetooth TM The short-range communication module 212 supports short-range communication using at least one of the following technologies: RFID, radio frequency identification (RFID), infrared data association (IrDA), ultra-wideband (UWB), ZigBee, near-field communication (NFC), Wi-Fi, Wi-Fi direct, and wireless universal serial bus (USB). The short-range communication module 212 can support wireless communication between the electronic device 2 and a wireless communication system, between the electronic device 2 and a device capable of wireless communication, or between the electronic device 2 and a network where an external server is located via a wireless local area network. The wireless local area network can be a wireless personal area network.

[0203] In this article, a device capable of wireless communication may be a mobile terminal capable of exchanging data (or communicating) with the electronic device 2 according to the present invention, such as a smartphone, a tablet computer, a laptop computer, etc. The short-range communication module 212 can detect (or identify) a device capable of wireless communication around the electronic device 2 that can communicate with the electronic device 2. In addition, when the detected device capable of wireless communication is a device that is authenticated as communicating with the electronic device 2 according to the embodiment, the controller 270 can send at least some of the data processed by the electronic device 2 to the device capable of wireless communication through the short-range communication module 212. Therefore, the user of the device capable of wireless communication can use the data processed in the electronic device 2 through the device capable of wireless communication.

[0204] In addition, the memory 220 stores data supporting various functions of the electronic device 2. The memory 220 may store a plurality of application programs (or applications), data for operating the electronic device 2, and commands driven in the electronic device 2.

[0205] The interface unit 230 serves as a passage for connecting to various external devices of the electronic device 2. The interface unit 230 may include at least one of a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device equipped with an identification module, an audio input / output (I / O) port, a video I / O port, and an earphone port.

[0206] The power supply unit 240 receives power from an external power source and an internal power source and supplies the power from the power source to each constituent element included in the electronic device 2 under the control of the controller 270. The power supply unit 240 includes a battery, which may be an embedded battery or a replaceable battery.

[0207] The display unit 250 displays (outputs) information processed by the electronic device 2. For example, the display unit 250 may display execution image information of an application driven in the electronic device 2, or user interface (UI) and graphical user interface (GUI) information according to the execution image information.

[0208] The display unit 250 may include a liquid crystal display (LCD), an organic light emitting diode (OLED) display, an electronic ink display, a quantum dot light emitting display, a micro light emitting diode (LED) display, or the like.

[0209] The display unit 250 includes a display panel 251 for displaying an image, and a display controller 252 connected to the display panel 251 to supply a signal for displaying the image to the display panel 251. For example, the display panel 251 may include a plurality of pixels connected to signal lines (such as a plurality of scan lines and a plurality of data lines), and a scan driver / receiver for supplying a scan signal to the scan lines, and the display controller 252 may include a data driver IC for generating a data signal to be applied to the data lines, a timing controller for controlling the overall operation of the display unit 250 by processing an image signal, and a power management IC.

[0210] The touch module 260 senses a touch (or touch input) applied to a touch area using a capacitive method. For example, the touch module 260 may be configured to convert changes in capacitance, voltage, current, etc. generated in a specific portion into an electrical input signal. When a touch object that applies a touch to the touch area touches the touch module 260, the touch module 260 may be configured to detect the position, area, capacitance, etc. of the touch location. Herein, a touch object refers to an object that applies a touch to the touch sensor and may be, for example, a user's body part (finger, palm, etc.), a passive or active stylus 10, etc.

[0211] The touch module 260 includes a touch sensor 261 and a touch controller 262 , where touch electrodes are located in the touch sensor 261 , and the touch controller 262 is configured to transmit touch data to the controller 270 and / or the display controller 252 by applying a driving signal to the touch sensor 261 and receiving a sensing signal from the touch sensor 261 .

[0212] The touch controller 262 can be connected to at least one of a plurality of first touch electrodes to apply a driving signal, and can include a first driver / receiver configured to receive a sensing signal, a second driver / receiver connected to at least one of a plurality of second touch electrodes to apply a driving signal and receive a sensing signal, and a microcontroller unit (MCU) configured to control the operation of the first driver / receiver and the second driver / receiver and obtain a touch position by using the sensing signals output from the first driver / receiver and the second driver / receiver.

[0213] The display panel 251 and the touch sensor 261 may be referred to as a touch screen 20 by forming an interlayer structure or being integrally formed.

[0214] The touch module 260 further includes a loop coil 264 and a coil driver 263 for applying a drive signal to the loop coil 264. The loop coil 264 can be located around the touch screen 20 or anywhere else in the electronic device 2. The loop coil 264 can also be configured as an antenna for the short-range communication module 212 (e.g., RFID or NFC). The drive signal includes an alternating current or an alternating voltage having a predetermined frequency.

[0215] The controller 270 may control driving of the electronic device 2 and may output touch coordinate information in response to a touch detection result of the electronic device 2. In addition, the controller 270 may change the frequency of a driving signal in response to a touch detection result thereof.

[0216] In addition to application-related operations, the controller 270 generally controls the general operation of the electronic device 2. The controller 270 processes input or output signals, data, information, etc., or drives the application stored in the memory 220 through the above-mentioned components, thereby providing or processing appropriate information or functions for the user.

[0217] In addition, the controller 270 may control the reference Figure 2 The controller 270 may combine at least a part of the constituent elements described in the electronic device 2 to drive the application program stored in the memory 220. In addition, the controller 270 may combine two or more of the constituent elements included in the electronic device 2 and operate the combined constituent elements to drive the application program.

[0218] Figure 3Styluses 10a, 10b, and 10c each include a conductive tip 11 and a resonant circuit 12.

[0219] At least a portion of the conductive tip 11 may be formed of a conductive material (eg, metal, conductive rubber, conductive fabric, conductive silicone, etc.), but the present invention is not limited thereto.

[0220] Resonant circuit 12, which is an LC resonant circuit, can resonate with the drive signal output from loop coil 264. The drive signal may include a signal (e.g., a sine wave, a square wave, etc.) having a frequency corresponding to the resonant frequency of resonant circuit 12. To resonate, the resonant frequency of resonant circuit 12 and the frequency of the drive signal must be the same or very similar. The resonant frequency of styluses 10a, 10b, and 10c depends on the design value of resonant circuit 12 of styluses 10a, 10b, and 10c. When loop coil 264 generates a magnetic field in response to the drive signal, resonant circuit 12 of stylus 10 resonates using the signal received through the change in the magnetic field.

[0221] Each of the stylus pens 10a, 10b, and 10c can be housed within a housing. The housing may have a cylindrical shape, a polygonal shape, a cylindrical shape with at least a portion of a curved surface, a convex shape, a truncated pyramidal shape, a truncated cone shape, etc., but is not limited thereto. Since the housing has a hollow interior, each of the stylus pens 10a, 10b, and 10c, such as the conductive tip 11 and the resonant circuit 12, can be housed therein. The housing may be made of a non-conductive material.

[0222] Figure 3 The stylus pen 10a shown in (a) may include a conductive tip 11 and a resonant circuit 12 directly connected to the conductive tip 11. The resonant circuit 12 generates resonance using energy transmitted from the loop coil 264 and directly outputs the resonant energy through the conductive tip 11.

[0223] A resonance signal generated by the resonance can be output to the touch screen 20 through the conductive tip 11 during and after a period when the driving signal is input to the loop coil 264. The resonance circuit 12 is located in the housing and is electrically connected to the ground.

[0224] Figure 3 The stylus 10b shown in (b) includes a conductive tip 11, a resonant circuit 12, a rectifier 13, a power storage 14, and an active circuit 15. In addition, the stylus 10 may further include a sensor (not shown) and / or a communication module (not shown).

[0225] The resonant circuit 12 can generate resonance using energy transferred from the toroidal coil 264, and the resonant energy can be rectified in the rectifier 13 to be used to charge the power storage 14. The power storage 14 includes a rechargeable battery or a capacitor such as an electric double layer capacitor (EDLC).

[0226] Active circuit 15 can receive power from power storage 14 to change the amplitude, frequency, phase, etc. of the resonance signal transmitted to touch screen 20. In addition, active circuit 15 can send additional signals other than touch input to short-range communication module 212 of electronic device 2.

[0227] Figure 3 The stylus pen 10 c shown in FIG. 5 (c) includes a conductive tip 11 , a resonant circuit 12 , a battery 50 connected to the resonant circuit 12 to store power, and an active handwriting module 60 connected to the conductive tip 11 .

[0228] The resonant circuit 12 generates resonance using energy transferred from the loop coil 264 and directly outputs the resonant energy through the conductive tip 11. The active handwriting module 60 may receive power from the battery 50 to transmit a signal to the touch screen 20.

[0229] Figure 4 FIG. 1 shows a case where a stylus pen is used on an electronic device according to an embodiment.

[0230] like Figure 4 As shown, the touch screen 20 of the electronic device includes a display panel 251 , a touch sensor 261 above the display panel 251 , and a loop coil 264 below the display panel 251 .

[0231] The touch sensor 261 may include a substrate 23 , a touch electrode layer 21 over the substrate 23 , and a window 22 over the touch electrode layer 21 .

[0232] The substrate 23 may be an encapsulation substrate of the display panel 251 or a color filter substrate of the display panel 251 , and is preferably made of a transparent material.

[0233] The touch electrode layer 21 may include a plurality of first touch electrodes for detecting touch coordinates in a first direction and a plurality of second touch electrodes for detecting touch coordinates in a second direction intersecting the first direction. Figure 4 Although shown as a single layer in the figure, the first touch electrode and the second touch electrode may be located on different layers, or may be positioned to overlap with each other, or may be positioned not to overlap with each other, or a separate layer may be provided therebetween.

[0234] The window 22 may be located on the touch electrode layer 21. The touch electrode layer 21, the conductive tip 11, and the window 22 may generate capacitance. Therefore, the signal (resonance signal or active touch signal) generated by the stylus 10 may be transmitted to the touch electrode layer 21 through the capacitance.

[0235] The loop coil 264 may include a substrate 24 and a ferrite sheet 25, with the antenna loop located on the substrate 24. The antenna loop may be formed of a conductive material, such as copper, silver, etc. As will be described below with reference to Figures 14 to 19 As described above, in addition to substrate 24, the antenna loop may also be located on the same layer as the touch electrode layer 21. In this case, the antenna loop may be formed of a conductive material with high transmittance and low impedance, such as ITO, graphene, silver nanowires, etc. In addition, the antenna loop may be located below window 22, and in this case, substrate 24 may not be included in annular coil 264.

[0236] The substrate 24 may be attached to the rear surface of the display panel 251. The substrate 24 may be located on the rear surface of the display panel 251. The substrate 24 may be a single-layer flexible printed circuit board (FPCB) (e.g., a single-sided FPCB, a double-sided FPCB) or a multi-layer FPCB. However, preferably, the touch screen 20 may be a single-sided FPCB or a double-sided FPCB, i.e., a single-layer FPCB, to achieve thinning and miniaturization of the FPCB. Since such a single-sided FPCB can be made very thin, it can be used in bendable, foldable, and retractable electronic devices. Figure 4 The substrates 23 and 24 in the embodiment may be FPCBs or rigid printed circuit boards (PCBs).

[0237] When the substrate 24 is formed of a double-sided FPCB, a conductive layer may be located on the second surface relative to the first surface where the antenna loop is located. The conductive layer is made of a conductive material and may be, for example, a copper foil layer.

[0238] The substrate 24 may include a base film. The base film may be made of a polyimide resin, an epoxy resin, or another known flexible material. The base film may be flexible. At least one antenna loop including at least one wire may be formed on the base film.

[0239] Will refer to Figure 5 The antenna loop 241 formed on the substrate 24 is described.

[0240] Figure 5 An example in which an antenna pattern is implemented on one surface of a substrate is shown.

[0241] Reference Figure 5, the antenna loop 241 is formed as a conductive line on the base film 242. For example, the antenna loop can be printed on the base film 242 by photolithography, thin film sputtering, etc. The method for positioning the antenna loop on the base film 242 is not limited to the above method.

[0242] The antenna loop 241 has a spiral pattern that depends on the inductance design value of the antenna loop 241 and the radiation performance of the antenna loop 241. However, when the spiral pattern is implemented only on one surface of the base film 242, there is a problem that the wires of the antenna loop 241 may short-circuit with each other at a point SP on one surface of the base film 242. It is conceivable to implement such a spiral pattern by using a double-sided FPCB. For example, an opening or hole can be formed in the base film 242, through which the wires on the first surface can be connected to the wires on the second surface. However, when a copper foil layer is attached to the second surface of the double-sided FPCB, there may be a problem that the wires on the second surface and the copper foil layer come into contact with each other or are electrically connected.

[0243] Next, we will refer to Figures 6 to 13 Describes an example of a stylus and an electronic device sending and receiving signals.

[0244] Figures 6 to 11 Each shows a schematic circuit diagram of a display stylus and an electronic device.

[0245] Figure 3 The resonant circuit 12 can be represented as an equivalent circuit including a resistor Rp, an inductor Lp, and a capacitor Cp, or an equivalent circuit including a resistor Rs, an inductor Ls, and a capacitor Cs.

[0246] like Figure 6 and Figure 7 As shown, when the loop coil L0 forms a magnetic field through the power supply 40 transmitting a driving signal, a current may be induced in the inductor LP of the stylus pen 10 to cause the resonant circuit 12 to resonate.

[0247] like Figures 8 to 11 As shown, when the loop coil and the internal capacitor are resonated by the power supply 40 transmitting the driving signal, the resonant circuit 12 of the stylus 10 may also resonate with the loop coil and the internal capacitor.

[0248] Figure 8 The case is shown where the loop coil Ldp and the internal capacitor Cdp are connected in parallel, and the resistor Rp, the inductor Lp, and the capacitor Cp of the resonance circuit 12 are connected in parallel.

[0249] Figure 9 The case is shown where the loop coil Ldp and the internal capacitor Cdp are connected in parallel, and the resistor Rs, the inductor Ls, and the capacitor Cs of the resonance circuit 12 are connected in series.

[0250] Figure 10 The case is shown where the loop coil Lds and the internal capacitor Cds are connected in series, and the resistor Rp, the inductor Lp, and the capacitor Cp of the resonance circuit 12 are connected in parallel.

[0251] Figure 11 The case is shown where the loop coil Lds and the internal capacitor Cds are connected in series, and the resistor Rs, the inductor Ls, and the capacitor Cs of the resonance circuit 12 are connected in series.

[0252] Next, we will refer to Figures 12 to 22 The antenna loop according to the present invention is described as implementing a spiral pattern on a plane. Figure 4 The components described are identical to the description of the components.

[0253] Figures 12 to 14 Partial views showing an antenna module and an electronic device including the antenna module according to a first embodiment are shown.

[0254] like Figure 12 As shown, a plurality of sub-antenna loops 241a and 241b are located on a base film 242. The antenna loop 241 may be formed of a conductive material having high transmittance and low impedance, such as ITO, graphene, silver nanowire, or the like.

[0255] Figure 13 Shown along Figure 12 The cross-sectional view taken along the line AA'. Figure 13 As shown, the sub-antenna loops 241a and 241b are shown as being located on one surface of the base film 242 spaced apart from the ferrite sheet 25, but the present invention is not limited thereto.

[0256] Sub-antenna loops 241a and 241b are spaced apart from each other on one surface of base film 242 and do not directly contact each other. A first end of first sub-antenna loop 241a is connected to a corresponding first pad 243a among a plurality of pads, and a second end is connected to a corresponding second pad 243b. A first end of second sub-antenna loop 241b is connected to a corresponding first pad 243c among a plurality of pads, and a second end is connected to a corresponding second pad 243d.

[0257] Each of the sub-antenna loops 241a and 241b may be a conductive line extending along the boundary of the display area DP. Although each of the sub-antenna loops 241a and 241b is shown as having an overall rectangular shape, they may have a shape such as a circle, an ellipse, a polygon, or a polygon with rounded corners, but the present invention is not limited thereto.

[0258] Furthermore, the first sub-antenna loop 241a is located outside the second sub-antenna loop 241b. The first sub-antenna loop 241a may extend along the periphery of the second sub-antenna loop 241b. The shortest distance between adjacent first and second sub-antenna loops 241a, 241b may be the same on one surface of the base film 242, but the present invention is not limited thereto. The first and second sub-antenna loops 241a, 241b may be wires of the same width, but the present invention is not limited thereto. The first and second sub-antenna loops 241a, 241b may be made of the same material, but the present invention is not limited thereto.

[0259] The flexible circuit board 27 may be connected to the plurality of pads 243a, 243b, 243c, and 243d of the base film 242. The flexible circuit board 27 may be a flexible printed circuit board (FPCB). The coil driver 263 is mounted on the flexible circuit board 27.

[0260] The flexible circuit board 27 can be electrically connected to the pads 243a, 243b, 243c, and 243d. For example, the multiple pads (not shown) on the flexible circuit board 27 connected to the multiple signal transmission wires 271a and 271b and the connection wire 272 can be connected to the pads 243a, 243b, 243c, and 243d via the connector 26. The connector 26 can be a ZIF connector (zero insertion force connector), a BTB connector (board-to-board connector), etc., but the present invention is not limited to this. The socket of the connector 26 is formed on the substrate 24, and the pads (not shown) and the pads 243a, 243b, 243c, and 243d can be electrically connected to each other by inserting the flexible circuit board 27 into the socket of the connector 26.

[0261] As another example, the pads (not shown) of the flexible circuit board 27 may be soldered to the pads 243a, 243b, 243c, and 243d. For example, the pads (not shown) on the flexible circuit board 27 connected to the signal transmission wires 271a and 271b and the connection wire 272 may be connected to the pads 243a, 243b, 243c, and 243d through an anisotropic conductive film (ACF) by an outer lead bonding (OLB) method.

[0262] In addition, various connection methods of electrically and physically connecting a pad (not shown) of the flexible circuit board 27 and the pads 243 a , 243 b , 243 c , and 243 d may be used.

[0263] The flexible circuit board 27 includes a plurality of signal transmission wires 271a and 271b located on a first surface of the flexible circuit board, and connection wires 272 located on a second surface thereof. The wires 271a, 271b, and 272 can be printed using photolithography, thin film sputtering, or the like. The method for positioning the wires 271a, 271b, and 272 on the flexible circuit board 27 is not limited to the method described above. Furthermore, while the signal transmission wires 271a and 271b and the connection wires 272 are described above as being located on opposite surfaces of a single substrate, they may alternatively be located on different substrates, and the present invention is not limited thereto.

[0264] The signal transmission wire 271 a connects the pad 243 a connected to the first sub-antenna loop 241 a to the coil driver 263 , and the signal transmission wire 271 b connects the pad 243 d connected to the second sub-antenna loop 241 b to the coil driver 263 .

[0265] Connecting wire 272 connects pad 243b connected to first sub-antenna loop 241a and pad 243c connected to second sub-antenna loop 241b. That is, first sub-antenna loop 241a and second sub-antenna loop 241b are electrically connected via connecting wire 272 located on flexible printed circuit 27. Therefore, current introduced from coil driver 263 to pad 243a via signal transmission wire 271a flows in the following order: first sub-antenna loop 241a, pad 243b, connecting wire 272, pad 243c, second sub-antenna loop 241b, pad 243d, and signal transmission wire 271b.

[0266] That is, the antenna module according to this embodiment has substantially the same effect as an antenna loop formed in a spiral pattern, without forming wires in a spiral pattern on the base film 242. Since all wires are formed on the first surface of the base film 242 in this antenna module, a copper foil layer can be formed on the second surface, thereby reducing manufacturing costs and reducing the thickness and size of the touch screen 20.

[0267] In the above description, an example of implementing a spiral pattern by using two sub-antenna loops has been described, but depending on the design, a spiral pattern can be implemented using three or more sub-antenna loops by connecting each sub-antenna loop to a connecting wire 272 formed on a multilayer board of a flexible circuit board 27.

[0268] like Figure 14As shown, multiple antenna loops can be located on touch screen 20. A first sub-antenna loop 241a, a connecting wire 272a, and a second sub-antenna loop 241b form a first antenna loop in a spiral pattern. A third sub-antenna loop 241c, a connecting wire 272b, and a fourth sub-antenna loop 241d form a second antenna loop in a spiral pattern. The first and second antenna loops are spaced apart in the y-axis direction. Here, a ferrite sheet 25 can be located separately in each of the areas where the first and second antenna loops are located.

[0269] The coil driver 263 may apply driving signals having the same or similar phases to the first antenna loop and the second antenna loop, may apply driving signals having opposite phases, or may selectively drive the first antenna loop and the second antenna loop.

[0270] Figure 15 and Figure 16 Partial views showing an antenna module and an electronic device including the antenna module according to a second embodiment are shown.

[0271] Figure 15 and Figure 16 When the touch sensor 261 is implemented as an on-cell type touch sensor, a loop coil 264 is shown including an antenna loop 241 located at the same layer as the touch electrode layer 21 .

[0272] like Figure 15 and Figure 16 As shown, the annular coil 264 includes an antenna ring 241 located on the touch electrode layer 21 and a ferrite sheet 25 located under the display panel 251 .

[0273] Figure 16 Shown along Figure 15 The cross-sectional view taken along the line BB'. Figure 16 As shown, the antenna loops 241a and 241b and the touch electrode layer 21 are located in the same layer on the package substrate 23 of the display panel 251. The antenna loops 241a and 241b can be made of the same material as the first touch electrode and the second touch electrode of the touch electrode layer 21. For example, the antenna loops 241a and 241b can be formed of a conductive material with high transmittance and low impedance, such as ITO, graphene, silver nanowires, etc. However, the antenna loops 241a and 241b can also be located in a different layer from the touch electrode layer 21 and can be made of a different material from the first touch electrode and the second touch electrode.

[0274] Sub-antenna loops 241a and 241b are spaced apart from each other on one surface of package substrate 23 and do not directly contact each other. A first end of first sub-antenna loop 241a is connected to a corresponding first pad 243a among a plurality of pads, and a second end is connected to a corresponding second pad 243b. A first end of second sub-antenna loop 241b is connected to a corresponding first pad 243c among a plurality of pads, and a second end is connected to a corresponding second pad 243d. Simultaneously, a first touch electrode and a second touch electrode are connected to pad 243e.

[0275] Each of the sub-antenna loops 241a and 241b may be a conductive line extending along the boundary of the display area DP. Although each of the sub-antenna loops 241a and 241b is shown as having an overall rectangular shape, they may have a shape such as a circle, an ellipse, a polygon, or a polygon with rounded corners, but the present invention is not limited thereto.

[0276] Furthermore, the first sub-antenna loop 241a is located outside the second sub-antenna loop 241b. The first sub-antenna loop 241a may extend along the periphery of the second sub-antenna loop 241b. The shortest distance between adjacent first and second sub-antenna loops 241a, 241b may be the same on one surface of the package substrate 23, but the present invention is not limited to this. The first and second sub-antenna loops 241a, 241b may be wires of the same width, but the present invention is not limited to this. The first and second sub-antenna loops 241a, 241b may be made of the same material, but the present invention is not limited to this.

[0277] The flexible circuit board 27 may be connected to the plurality of pads 243 a , 243 b , 243 c , and 243 d of the package substrate 23 .

[0278] A plurality of pads (not shown) connected to the signal transmission wires 271a and 271b and the connection wires 272 on the flexible circuit board 27 can be electrically connected to the pads 243a, 243b, 243c, and 243d. The pads (not shown) can be soldered to the pads 243a, 243b, 243c, and 243d. For example, the pads (not shown) can be connected to the pads 243a, 243b, 243c, and 243d by outer lead bonding (OLB) or an anisotropic conductive film (ACF).

[0279] In addition, various connection methods for electrically and physically connecting the pad (not shown) with the pads 243a, 243b, 243c, and 243d may be used.

[0280] The flexible circuit board 27 includes a plurality of signal transmission wires 271a and 271b located on a first surface of the flexible circuit board, and connection wires 272 located on a second surface thereof. The wires 271a, 271b, and 272 can be printed using photolithography, thin film sputtering, or the like. The method for positioning the wires 271a, 271b, and 272 on the flexible circuit board 27 is not limited to the method described above. Furthermore, while the signal transmission wires 271a and 271b and the connection wires 272 are described above as being located on opposite surfaces of a single substrate, they may alternatively be located on different substrates, and the present invention is not limited thereto.

[0281] The signal transmission wire 271 a connects the pad 243 a connected to the first sub-antenna loop 241 a to the coil driver 263 , and the signal transmission wire 271 b connects the pad 243 d connected to the second sub-antenna loop 241 b to the coil driver 263 .

[0282] Connecting wire 272 connects pad 243b connected to first sub-antenna loop 241a and pad 243c connected to second sub-antenna loop 241b. That is, first sub-antenna loop 241a and second sub-antenna loop 241b are electrically connected via connecting wire 272 located on flexible printed circuit 27. Therefore, current introduced from coil driver 263 to pad 243a via signal transmission wire 271a flows in the following order: first sub-antenna loop 241a, pad 243b, connecting wire 272, pad 243c, second sub-antenna loop 241b, pad 243d, and signal transmission wire 271b.

[0283] That is, the antenna module according to this embodiment has substantially the same effect as an antenna loop formed in a spiral pattern, without requiring a wire formed in a spiral pattern on the package substrate 23. In this antenna module, all wires are formed on the first surface of the package substrate 23, thereby reducing manufacturing costs and the thickness and size of the touch screen 20.

[0284] Figure 17 and Figure 18 Partial views showing an antenna module and an electronic device including the antenna module according to a third embodiment are shown.

[0285] Figure 17 and Figure 18 When the touch sensor 261 is implemented as an In-cell type touch sensor, a loop coil 264 is shown including an antenna loop 241 located at the same layer as the touch electrode layer 21 .

[0286] like Figure 17 and Figure 18As shown, the annular coil 264 includes an antenna ring 241 located on the touch electrode layer 21 and a ferrite sheet 25 located under the display panel 251 .

[0287] Figure 18 Shown along Figure 17 The cross-sectional view taken along the line C-C'. Figure 18 As shown, the antenna loops 241a and 241b and the touch electrode layer 21 may be located on the same layer between the color filter substrate 23 of the display panel 251 and the TFT substrate of the display panel 251. The touch electrode layer 21 and the antenna loops 241a and 241b may all be located above and below the color filter substrate 23.

[0288] The antenna loops 241a and 241b may be made of the same material as the first touch electrodes and the second touch electrodes of the touch electrode layer 21. For example, the antenna loops 241a and 241b may be formed of a conductive material having high transmittance and low impedance, such as ITO, graphene, silver nanowires, etc. However, the antenna loops 241a and 241b may also be located in a layer different from the touch electrode layer 21 and may be made of a material different from that of the first touch electrodes and the second touch electrodes.

[0289] The sub-antenna loops 241a and 241b are spaced apart from each other on one surface of the color filter substrate 23 and do not directly contact each other. The first sub-antenna loop 241a has a first end connected to a corresponding first pad 243a among the plurality of pads, and a second end connected to a corresponding second pad 243b. The second sub-antenna loop 241b has a first end connected to a corresponding first pad 243c among the plurality of pads, and a second end connected to a corresponding second pad 243d. Simultaneously, the first touch electrode and the second touch electrode are connected to the pad 243e.

[0290] Each of the sub-antenna loops 241a and 241b may be a conductive line extending along the boundary of the display area DP. Although each of the sub-antenna loops 241a and 241b is shown as having an overall rectangular shape, they may have a shape such as a circle, an ellipse, a polygon, or a polygon with rounded corners, but the present invention is not limited thereto.

[0291] Furthermore, the first sub-antenna loop 241a is located outside the second sub-antenna loop 241b. The first sub-antenna loop 241a may extend along the periphery of the second sub-antenna loop 241b. The shortest distance between adjacent first and second sub-antenna loops 241a, 241b may be the same on one surface of the color filter substrate 23, but the present invention is not limited thereto. The first sub-antenna loop 241a and the second sub-antenna loop 241b may be wires of the same width, but the present invention is not limited thereto. The first sub-antenna loop 241a and the second sub-antenna loop 241b may be made of the same material, but the present invention is not limited thereto.

[0292] The flexible circuit board 27 may be connected to the plurality of pads 243 a , 243 b , 243 c , and 243 d of the color filter substrate 23 .

[0293] A plurality of pads (not shown) connected to the signal transmission wires 271a and 271b and the connection wires 272 on the flexible circuit board 27 can be electrically connected to the pads 243a, 243b, 243c, and 243d. The pads (not shown) can be soldered to the pads 243a, 243b, 243c, and 243d. For example, the pads (not shown) can be connected to the pads 243a, 243b, 243c, and 243d by outer lead bonding (OLB) or an anisotropic conductive film (ACF).

[0294] In addition, various connection methods for electrically and physically connecting the pad (not shown) with the pads 243a, 243b, 243c, and 243d may be used.

[0295] The flexible circuit board 27 includes a plurality of signal transmission wires 271a and 271b located on a first surface of the flexible circuit board, and connection wires 272 located on a second surface thereof. The wires 271a, 271b, and 272 can be printed using photolithography, thin film sputtering, or the like. The method for positioning the wires 271a, 271b, and 272 on the flexible circuit board 27 is not limited to the method described above. Furthermore, while the signal transmission wires 271a and 271b and the connection wires 272 are described above as being located on opposite surfaces of a single substrate, they may alternatively be located on different substrates, and the present invention is not limited thereto.

[0296] The signal transmission wire 271 a connects the pad 243 a connected to the first sub-antenna loop 241 a to the coil driver 263 , and the signal transmission wire 271 b connects the pad 243 d connected to the second sub-antenna loop 241 b to the coil driver 263 .

[0297] Connecting wire 272 connects pad 243b connected to first sub-antenna loop 241a and pad 243c connected to second sub-antenna loop 241b. That is, first sub-antenna loop 241a and second sub-antenna loop 241b are electrically connected via connecting wire 272 located on flexible printed circuit 27. Therefore, current introduced from coil driver 263 to pad 243a via signal transmission wire 271a flows in the following order: first sub-antenna loop 241a, pad 243b, connecting wire 272, pad 243c, second sub-antenna loop 241b, pad 243d, and signal transmission wire 271b.

[0298] That is, the antenna module according to this embodiment has substantially the same effect as an antenna loop formed in a spiral pattern, without requiring a wire formed in a spiral pattern on the color filter substrate 23. In this antenna module, all wires are formed on the first surface of the color filter substrate 23, thereby reducing manufacturing costs and the thickness and size of the touch screen 20.

[0299] Figure 19 and Figure 20 Partial views showing an antenna module and an electronic device including the antenna module according to a fourth embodiment are shown.

[0300] like Figure 19 and Figure 20 As shown, the loop coil 264 includes antenna loops 241a and 241b located below the window 22, a ferrite sheet 25a located below the display panel 251, and a ferrite sheet 25b located below the antenna loops 241a and 241b.

[0301] Figure 20 Shown along Figure 19 The cross-sectional view taken along the line D-D' is shown. Figure 20 As shown, the antenna loops 241a and 241b can be printed on the window 22 by a method such as photolithography, thin film sputtering, etc., or the antenna loops 241a and 241b can be printed on a sheet to be attached to the window 22 by a method such as photolithography, thin film sputtering, etc. The method of positioning the antenna loops 241a and 241b on the window 22 is not limited to the above method.

[0302] Sub-antenna loops 241a and 241b are spaced apart from each other on one surface of window 22 and do not directly contact each other. A first end of first sub-antenna loop 241a is connected to a corresponding first solder pad 243a among a plurality of solder pads, and a second end is connected to a corresponding second solder pad 243b. A first end of second sub-antenna loop 241b is connected to a corresponding first solder pad 243c among a plurality of solder pads, and a second end is connected to a corresponding second solder pad 243d.

[0303] Each of the sub-antenna loops 241a and 241b may be a conductive line extending along the boundary of the display area DP. Although each of the sub-antenna loops 241a and 241b is shown as having an overall rectangular shape, they may have a shape such as a circle, an ellipse, a polygon, or a polygon with rounded corners, but the present invention is not limited thereto.

[0304] Furthermore, the first sub-antenna loop 241a is located outside the second sub-antenna loop 241b. The first sub-antenna loop 241a may extend along the periphery of the second sub-antenna loop 241b. The shortest distance between adjacent first and second sub-antenna loops 241a, 241b may be the same on one surface of the window 22, but the present invention is not limited thereto. The first sub-antenna loop 241a and the second sub-antenna loop 241b may be wires of the same width, but the present invention is not limited thereto. The first sub-antenna loop 241a and the second sub-antenna loop 241b may be made of the same material, but the present invention is not limited thereto.

[0305] The flexible circuit board 27 can be connected to the pads 243a, 243b, 243c, and 243d. The flexible circuit board 27 can be a flexible printed circuit board (FPCB) or a chip-on-film (COF). Since the coil driver 263 is mounted on the flexible circuit board 27, the flexible circuit board 27 will be described as a chip-on-film (COF) below.

[0306] The flexible circuit board 27 can be electrically connected to the pads 243a, 243b, 243c, and 243d. For example, the multiple pads (not shown) on the flexible circuit board 27 connected to the multiple signal transmission wires 271a and 271b and the connection wire 272 can be connected to the pads 243a, 243b, 243c, and 243d via the connector 26. The connector 26 can be a ZIF connector (zero insertion force connector), a BTB connector (board-to-board connector), etc., but the present invention is not limited to this. The socket of the connector 26 is formed on the window 22, and the pads (not shown) and the pads 243a, 243b, 243c, and 243d can be electrically connected to each other by inserting the flexible circuit board 27 into the socket of the connector 26.

[0307] As another example, the pads (not shown) of the flexible circuit board 27 may be soldered to the pads 243a, 243b, 243c, and 243d. For example, the pads (not shown) on the flexible circuit board 27 connected to the signal transmission wires 271a and 271b and the connection wire 272 may be connected to the pads 243a, 243b, 243c, and 243d through an anisotropic conductive film (ACF) by an outer lead bonding (OLB) method.

[0308] In addition, various connection methods for electrically and physically connecting the pad (not shown) with the pads 243a, 243b, 243c, and 243d may be used.

[0309] The flexible circuit board 27 includes a plurality of signal transmission wires 271a and 271b located on a first surface of the flexible circuit board, and connection wires 272 located on a second surface thereof. The wires 271a, 271b, and 272 can be printed using photolithography, thin film sputtering, or the like. The method for positioning the wires 271a, 271b, and 272 on the flexible circuit board 27 is not limited to the method described above. Furthermore, while the signal transmission wires 271a and 271b and the connection wires 272 are described above as being located on opposite surfaces of a single substrate, they may alternatively be located on different substrates, and the present invention is not limited thereto.

[0310] The signal transmission wire 271 a connects the pad 243 a connected to the first sub-antenna loop 241 a to the coil driver 263 , and the signal transmission wire 271 b connects the pad 243 d connected to the second sub-antenna loop 241 b to the coil driver 263 .

[0311] Connecting wire 272 connects pad 243b connected to first sub-antenna loop 241a and pad 243c connected to second sub-antenna loop 241b. That is, first sub-antenna loop 241a and second sub-antenna loop 241b are electrically connected via connecting wire 272 located on flexible printed circuit 27. Therefore, current introduced from coil driver 263 to pad 243a via signal transmission wire 271a flows in the following order: first sub-antenna loop 241a, pad 243b, connecting wire 272, pad 243c, second sub-antenna loop 241b, pad 243d, and signal transmission wire 271b.

[0312] That is, the antenna module according to this embodiment has substantially the same effect as an antenna loop formed in a spiral pattern, without forming a spiral pattern of wires on the base film 242. In this antenna module, all wires are formed on the first surface of the window 22, thereby reducing manufacturing costs and the thickness and size of the touch screen 20.

[0313] Figure 21 and Figure 22 Partial views showing an antenna module and an electronic device including the antenna module according to a fifth embodiment are shown.

[0314] like Figure 21 and Figure 22 As shown, the loop coil 264 includes antenna loops 241 a and 241 b located below the display panel 251 , and the ferrite sheet 25 located below the display panel 251 .

[0315] Figure 22 Shown along Figure 21 The cross-sectional view taken along the line D-D' is shown. Figure 22As shown, the antenna loops 241a and 241b may be printed on the display panel 251 by methods such as photolithography and thin film sputtering. The method of positioning the antenna loops 241a and 241b on the display panel 251 is not limited to the above methods.

[0316] Sub-antenna loops 241a and 241b are spaced apart from each other on one surface of display panel 251 and do not directly contact each other. A first end of first sub-antenna loop 241a is connected to a corresponding first pad 243a among a plurality of pads, and a second end is connected to a corresponding second pad 243b. A first end of second sub-antenna loop 241b is connected to a corresponding first pad 243c among a plurality of pads, and a second end is connected to a corresponding second pad 243d. Pads 243a, 243b, 243c, and 243d may be formed on one surface of display panel 251.

[0317] Each of the sub-antenna loops 241a and 241b may be a conductive line extending along the boundary of the display area DP. Although each of the sub-antenna loops 241a and 241b is shown as having an overall rectangular shape, they may have a shape such as a circle, an ellipse, a polygon, or a polygon with rounded corners, but the present invention is not limited thereto.

[0318] Furthermore, the first sub-antenna loop 241a is located outside the second sub-antenna loop 241b. The first sub-antenna loop 241a may extend along the periphery of the second sub-antenna loop 241b. The shortest distance between adjacent first and second sub-antenna loops 241a, 241b may be the same on one surface of the display panel 251, but the present invention is not limited thereto. The first sub-antenna loop 241a and the second sub-antenna loop 241b may be wires of the same width, but the present invention is not limited thereto. The first sub-antenna loop 241a and the second sub-antenna loop 241b may be made of the same material, but the present invention is not limited thereto.

[0319] The flexible circuit board 27 can be connected to the pads 243a, 243b, 243c, and 243d. The flexible circuit board 27 can be a flexible printed circuit board (FPCB) or a chip on film (COF). Since the coil driver 263 is mounted on the flexible circuit board 27, the flexible circuit board 27 will be described as a chip on film (COF) below.

[0320] The flexible circuit board 27 can be electrically connected to the pads 243a, 243b, 243c, and 243d. For example, the multiple pads (not shown) on the flexible circuit board 27 connected to the multiple signal transmission wires 271a and 271b and the connection wires 272 can be coupled to the pads 243a, 243b, 243c, and 243d via the connector 26. The connector 26 can be a ZIF connector (zero insertion force connector), a BTB connector (board-to-board connector), etc., but the present invention is not limited thereto. The socket of the connector 26 is formed on the display panel 251, and the pads (not shown) and the pads 243a, 243b, 243c, and 243d can be electrically connected to each other by inserting the flexible circuit board 27 into the socket of the connector 26.

[0321] As another example, the pads (not shown) of the flexible circuit board 27 may be soldered to the pads 243a, 243b, 243c, and 243d. For example, the pads (not shown) on the flexible circuit board 27 connected to the signal transmission wires 271a and 271b and the connection wire 272 may be connected to the pads 243a, 243b, 243c, and 243d through an anisotropic conductive film (ACF) by an outer lead bonding (OLB) method.

[0322] In addition, various connection methods for electrically and physically connecting the pad (not shown) with the pads 243a, 243b, 243c, and 243d may be used.

[0323] The flexible circuit board 27 includes a plurality of signal transmission wires 271a and 271b located on a first surface of the flexible circuit board, and connection wires 272 located on a second surface thereof. The wires 271a, 271b, and 272 can be printed using photolithography, thin film sputtering, or the like. The method for positioning the wires 271a, 271b, and 272 on the flexible circuit board 27 is not limited to the method described above. Furthermore, while the signal transmission wires 271a and 271b and the connection wires 272 are described above as being located on opposite surfaces of a single substrate, they may alternatively be located on different substrates, and the present invention is not limited thereto.

[0324] The signal transmission wire 271 a connects the pad 243 a connected to the first sub-antenna loop 241 a to the coil driver 263 , and the signal transmission wire 271 b connects the pad 243 d connected to the second sub-antenna loop 241 b to the coil driver 263 .

[0325] Connecting wire 272 connects pad 243b connected to first sub-antenna loop 241a and pad 243c connected to second sub-antenna loop 241b. That is, first sub-antenna loop 241a and second sub-antenna loop 241b are electrically connected via connecting wire 272 located on flexible printed circuit 27. Therefore, current introduced from coil driver 263 to pad 243a via signal transmission wire 271a flows in the following order: first sub-antenna loop 241a, pad 243b, connecting wire 272, pad 243c, second sub-antenna loop 241b, pad 243d, and signal transmission wire 271b.

[0326] That is, the antenna module according to this embodiment has substantially the same effect as an antenna loop formed in a spiral pattern, without forming a spiral pattern of wires on the base film 242. In this antenna module, all wires are formed on the lower surface of the display panel 251, thereby reducing manufacturing costs and the thickness and size of the touch screen 20.

[0327] Hereinafter, when the electronic device according to the embodiment is implemented as a foldable device, the electronic device and a driving method thereof will be described.

[0328] Figure 23 A schematic diagram showing a stylus and a portable electronic device is shown.

[0329] The foldable electronic device 2 may include Figure 2 The constituent elements of the electronic equipment.

[0330] like Figure 23 As shown, in a component such as a rectangular foldable electronic device 2 or the touch screen 20 included therein, in a plan view, the long side located on the left is called the first long side LS1, the long side located on the right is called the second long side LS2, the short side located on the upper side is called the first short side SS1, and the short side located on the lower side is called the second short side SS2.

[0331] The foldable electronic device 2 can be bent along a predetermined folding direction based on a folding axis AXIS_F intersecting the first short side SS1 and the second short side SS2. That is, the foldable electronic device 2 can switch between a folded state and an unfolded state along the folding direction based on the folding axis AXIS_F.

[0332] Next, we will refer to Figure 24 and Figure 25 A case where a conventional stylus (eg, an EMR-type pen) is used in a foldable electronic device is described.

[0333] Figure 24 and Figure 25 A case where a stylus according to a conventional method is used on a foldable electronic device is shown.

[0334] The foldable electronic devices described herein may have Figure 24 shown flat or unfolded, Figure 25 The folded state and the intermediate state between the unfolded state and the folded state are shown. Here, unless otherwise explicitly stated, the term "folded state" refers to the "completely folded state".

[0335] like Figure 24 As shown, in the case of an electromagnetic resonance type pen among the passive styluses, the digitizer 33 transmits an electromagnetic signal B1 to the EMR type stylus 30 and then receives a resonance signal B2 from the EMR type stylus 30 .

[0336] The digitizer 33 may be attached below the display panel 251 and may include a flexible printed circuit board (FPCB) 34 on which a plurality of conductive antenna loops are formed and a ferrite sheet 35 that blocks a magnetic field generated by the antenna loops.

[0337] In the FPCB 34, multiple antenna loops for detecting the position of an input resonance signal are configured to include multiple layers. One antenna loop has a shape that overlaps with at least one other antenna loop in the Z-axis direction. Therefore, the thickness of the FPCB 34 is relatively thick.

[0338] like Figure 25 As shown, when the foldable electronic device 2 is folded about the folding axis AXIS_F, the FPCB 34 attached to the folded area (hereinafter referred to as the folding area) FA is deformed. Repeated folding applies stress to the wiring members forming the antenna loop, which may cause damage to the wiring members. In the folded state, at least a portion of the folding area FA can be formed by a curved surface with a predetermined curvature.

[0339] The ferrite sheet 35 blocks the magnetic field generated by the antenna loop from affecting the interior of the foldable electronic device 2. The ferrite sheet 35 is also relatively thick and easily deforms when the foldable electronic device 2 is folded, and may be damaged by repeated folding.

[0340] Therefore, it is difficult to apply the EMR type stylus 30 to the foldable electronic device 2. In addition, in the case of the EMR type, since signals are transmitted and received only through the digitizer 33, signal transmission B1 and signal reception B2 cannot be performed simultaneously, and thus there is a problem that signal transmission and signal reception must be performed in a time-division manner.

[0341] Figure 26 and Figure 27 A foldable electronic device according to an embodiment is shown.

[0342] The touch screen 20 of the foldable electronic device includes a display panel 251 , a touch sensor 261 above the display panel 251 , and a loop coil 264 below the display panel 251 .

[0343] The touch sensor 261 may include a substrate 23 , a touch electrode layer 21 over the substrate 23 , and a window 22 over the touch electrode layer 21 .

[0344] The substrate 23 may be an encapsulation substrate of the display panel 251 or a color filter substrate of the display panel 251 , and is preferably made of a transparent material.

[0345] The touch electrode layer 21 may include a plurality of first touch electrodes for detecting touch coordinates in a first direction and a plurality of second touch electrodes for detecting touch coordinates in a second direction intersecting the first direction. Figure 26 Although shown as a single layer in the figure, the first touch electrode and the second touch electrode may be located on different layers, or may be positioned to overlap with each other, or may be positioned not to overlap with each other, or a separate layer may be provided therebetween.

[0346] The window 22 may be located on the touch electrode layer 21. The touch electrode layer 21, the conductive tip 11, and the window 22 may generate capacitance. Therefore, the signal (resonance signal or active touch signal) generated by the stylus 10 may be transmitted to the touch electrode layer 21 through the capacitance.

[0347] The loop coil 264 may include a substrate 24 and a ferrite sheet 25, with the antenna loop located on the substrate 24. Figures 28 to 33 As described, in addition to the substrate 24 , the antenna loop may be located on the same layer as the touch electrode layer 21 , or may be located below the window 22 , and in this case, the substrate 24 may not be included in the annular coil 264 .

[0348] The substrate 24 may be attached to the rear surface of the display panel 251. The substrate 24 may be located in an area including the folding area FA on the rear surface of the display panel 251. The substrate 24 may be a single-sided FPCB, a double-sided FPCB, or a multi-layer FPCB, but is preferably a single-sided FPCB or a double-sided FPCB. Therefore, even when the folding area FA is bent relative to the folding axis AXIS_F, the risk of damage to the substrate 24 due to force applied to the substrate 24 is reduced.

[0349] The substrate 24 may include a flexible base film. The base film may be made of polyimide resin, epoxy resin, or another known material having flexibility. At least one antenna loop formed to include at least one wire may be formed on the base film.

[0350] The antenna loop is formed as a conductive line on the substrate 24. For example, the antenna loop can be printed on the substrate 24 by photolithography, thin film sputtering, etc. The method for positioning the antenna loop on the substrate 24 is not limited to the above method.

[0351] The ferrite sheet 25 can be located in an area other than the folding area FA on the XY plane. Here, the area excluding the folding area FA refers to an area in which, when the foldable electronic device 2 is in the folded state, the force acting on the ferrite sheet 25 will not damage the ferrite sheet 25, rather than that the ferrite sheet 25 is not located at all in the folding area FA. For example, although the ferrite sheet 25 is located in a portion of the folding area FA, if the ferrite sheet 25 is not damaged when the foldable electronic device 2 is repeatedly deformed between the folded state and the unfolded state, it may also correspond to an area excluding the folding area FA. Therefore, even when the folding area FA is bent relative to the folding axis AXIS_F, the risk of damage to the ferrite sheet 25 is reduced.

[0352] After the loop coil 264 transmits the electromagnetic signal B1 to the stylus 10 , the touch sensor 261 receives a resonance signal E1 from the stylus 10 .

[0353] The resonant circuit 12 of the stylus 10 may resonate with the loop coil 264, and the degree of mutual resonance occurring between the inductor of the resonant circuit 12 and the loop coil 264 is affected by mutual inductance. Alternatively, the resonant circuit 12 may resonate with the magnetic field generated by the loop coil 264. This is in reference to Figures 6 to 11 Description.

[0354] Figures 28 to 33 A view showing an arrangement of a touch panel and a loop coil according to various aspects of an embodiment is shown.

[0355] like Figure 28 As shown in FIG. 2( a ), the loop coil 264 is located below the display panel 251 . The loop coil 264 may include a substrate 24 and a ferrite sheet 25 . The substrate 24 includes a base film 242 and an antenna loop 241 .

[0356] like Figure 28 As shown in (b), the antenna loop 241 can be a conductive line extending along the boundary of the display area DP. Although the antenna loop 241 is shown as having an overall rectangular shape, it can have a shape such as a circle, an ellipse, a polygon, or a polygon with rounded corners, but the present invention is not limited thereto. In addition, the antenna loop 241 can be formed of a conductive material with high transmittance and low impedance, such as ITO, graphene, silver nanowires, etc. The antenna loop 241 can overlap with the area where the ferrite sheet 25 is located on the XY plane.

[0357] The ferrite sheet 25 may include a first sheet 25a located between the folding area FA and the long side LS1 and a second sheet 25b located between the folding area FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include a plurality of sheets. Even in this case, the ferrite sheet 25 is still located in an area other than the folding area FA on the rear surface of the display panel 251.

[0358] like Figure 29 As shown in (a), the antenna loop 241 can be directly printed on the substrate of the display panel 251 by a method such as photolithography or thin film sputtering. The method for directly forming the antenna loop 241 on the substrate of the display panel 251 is not limited to the above method.

[0359] like Figure 29 As shown in (b), the ferrite sheet 25 may include a first sheet 25a located between the folding area FA and the long side LS1 and a second sheet 25b located between the folding area FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include a plurality of sheets, and even in this case, the ferrite sheet 25 is still located in an area other than the folding area FA on the rear surface of the display panel 251.

[0360] The antenna loop 241 may be a conductive line extending along the boundary of the display area DP. Although the antenna loop 241 is shown as having an overall rectangular shape, it may have a circular, elliptical, polygonal, or polygonal shape with rounded corners, but the present invention is not limited thereto. Furthermore, the antenna loop 241 may be formed of a conductive material having high transmittance and low impedance, such as ITO, graphene, or silver nanowires. The antenna loop 241 may overlap the region where the ferrite sheet 25 is located on the XY plane.

[0361] Next, Figure 30 In the case of an on-cell type touch sensor, a loop coil 264 is shown, which includes an antenna loop 241 located on the same layer as the touch electrode layer 21, and Figure 31 In the case of an In-cell type touch sensor, a loop coil 264 is shown including an antenna loop 241 located on the same layer as the touch electrode layer 21 .

[0362] The antenna loop 241 may be made of the same material as the first and second touch electrodes of the touch electrode layer 21. However, the antenna loop 241 may be located at a different layer from the touch electrode layer 21 and may be made of a different material from the first and second touch electrodes.

[0363] like Figure 30 (a) and Figure 31As shown in FIG. 2( a ), the loop coil 264 includes an antenna loop 241 located on the touch electrode layer 21 and a ferrite sheet 25 located below the display panel 251 .

[0364] like Figure 30 As shown in (b), the antenna ring 241 and the touch electrode layer 21 are located in the same layer on the packaging substrate 23 of the display panel 251.

[0365] The antenna loop 241 may be a conductive line extending along the boundary of the display area DP and may overlap with the area where the ferrite sheet 25 is located on the XY plane.

[0366] The ferrite sheet 25 may include a first sheet 25a located between the folding area FA and the long side LS1 and a second sheet 25b located between the folding area FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include a plurality of sheets. Even in this case, the ferrite sheet 25 is still located in an area other than the folding area FA on the rear surface of the display panel 251.

[0367] like Figure 31 As shown in (b), the display panel 251 includes a touch electrode layer 21 and a loop coil 264. That is, the substrate 23 may be a color filter substrate of the display panel 251, and the touch electrode layer 21 and the antenna loop 241 may be located between the color filter substrate 23 and the TFT substrate of the display panel 251. Alternatively, the touch electrode layer 21 and the antenna loop 241 may be located both above and below the color filter substrate 23.

[0368] The antenna loop 241 may be a conductive line extending along the boundary of the display area DP and may overlap with the area where the ferrite sheet 25 is located on the XY plane.

[0369] The ferrite sheet 25 may include a first sheet 25a located between the folding area FA and the long side LS1 and a second sheet 25b located between the folding area FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include a plurality of sheets. Even in this case, the ferrite sheet 25 is still located in an area other than the folding area FA on the rear surface of the display panel 251.

[0370] exist Figures 28 to 31 In the embodiment, although the antenna loop 241 is shown as having a shape extending along the boundary of the display area DP inside the display area DP, the antenna loop 241 may be located outside the display area DP. In addition, the antenna loop 241 may be positioned so as not to overlap with the touch electrodes located on the touch electrode layer 21 on the XY plane and to surround the periphery of the area where the touch electrodes are located.

[0371] like Figure 32As shown in (a), the antenna loop 241 can be printed on the window 22 by a method such as photolithography, thin film sputtering, etc., or the antenna loop 241 can be printed on a sheet to be attached to the window 22 by a method such as photolithography, thin film sputtering, etc. The method of positioning the antenna loop 241 on the window 22 is not limited to the above method.

[0372] The ferrite sheet 25 includes a first sheet 25a, a second sheet 25b, a third sheet 25c and a third sheet 25d, wherein the first sheet 25a is attached to the rear surface of the display panel 251 and is located in the area between the folding area FA and the long side LS1, the second sheet 25b is attached to the rear surface of the display panel 251 and is located in the area between the folding area FA and the long side LS2, the third sheet 25c is located below the antenna ring 241 attached to the window 22 and is located at the long side LS1, and the third side 25d is located below the antenna ring 241 attached to the window 22 and is located at the long side LS2.

[0373] like Figure 33 As shown in FIG. 2( a ), the loop coil 264 is located below the display panel 251. The loop coil 264 may include a substrate 24 and a ferrite sheet 25. The substrate 24 includes a base film 242 and antenna loops 241a and 241b.

[0374] like Figure 33 As shown in (b), the ferrite sheet 25 may include a first sheet 25a located between the folding area FA and the long side LS1 and a second sheet 25b located between the folding area FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include a plurality of sheets, and even in this case, the ferrite sheet 25 is still located in an area other than the folding area FA on the rear surface of the display panel 251.

[0375] Antenna loop 241a may be a conductive line extending along the boundary between display area DP and folding area FA at long side LS1, and antenna loop 241b may be a conductive line extending along the boundary between display area DP and folding area FA at long side LS2. Antenna loop 241a may overlap with the area where first sheet 25a is located on the XY plane, and antenna loop 241b may overlap with the area where second sheet 25b is located on the XY plane.

[0376] Next, we will refer to Figure 34 and Figure 35 A method of driving the touch module 260 including the antenna module according to the present invention is described.

[0377] Figure 34 A portion of a touch module according to an embodiment is schematically shown.

[0378] The touch module 260 according to one embodiment includes a touch sensor 261, a loop coil 264, a coil driver 263 for driving the loop coil 264, and a touch controller 262 for controlling the touch sensor 261. The touch controller 262 may include a first driver / receiver 2620 and a second driver / receiver 2622 for transmitting and receiving signals to and from the touch sensor 261, and a controller 2624.

[0379] The touch sensor 261 may include a plurality of first touch electrodes 111-1 to 111-m for detecting touch coordinates in a first direction, and a plurality of second touch electrodes 121-1 to 121-n for detecting touch coordinates in a second direction intersecting the first direction. For example, the first touch electrodes 111-1 to 111-m may have a shape extending in the second direction, and the second touch electrodes 121-1 to 121-n may have a shape extending in the first direction. In the touch sensor 261, the first touch electrodes 111-1 to 111-m may be arranged along the first direction, and the second touch electrodes 121-1 to 121-n may be arranged along the second direction.

[0380] The first driver / receiver 2620 may apply a driving signal to the first touch electrodes 111 - 1 to 111 - m , and the second driver / receiver 2622 may apply a driving signal to the second touch electrodes 121 - 1 to 121 - n .

[0381] The first driver / receiver 2620 may receive sensing signals from the first touch electrodes 111-1 to 111-m, and the second driver / receiver 2622 may receive sensing signals from the second touch electrodes 121-1 to 121-n.

[0382] Although the touch sensor 261 has been described above as being implemented in a mutual capacitance method, the touch sensor 261 can be implemented in a self-capacitance method, and it is easy for those skilled in the art to appropriately modify the touch electrodes 111-1 to 111-m and 121-1 to 121-n, the first driver / receiver 2620 and the second driver / receiver 2622 in the mutual capacitance method, add new components or omit some components and modify them to adapt to the self-capacitance method.

[0383] That is, the touch sensor 261 may include a plurality of self-capacitive touch electrodes, and in this case, the touch electrodes may be arranged in a dot shape, or may be arranged to have a shape extending in one direction as described above.

[0384] The coil driver 263 applies a drive signal to the annular coil 264. The drive signal may include a signal having a frequency corresponding to the resonant frequency of the resonant circuit 12 (e.g., a sine wave, a square wave, etc.), and may be an AC voltage or AC current having a predetermined frequency. The frequency and amplitude of the drive signal may be changed under the control of the controller 2624.

[0385] The controller 2624 can receive sensor input from the stylus 10 by demodulating a touch signal received from at least one of the first driver / receiver 2620 and the second driver / receiver 2622. Furthermore, the controller 2624 can modulate the drive signal applied to the loop coil 264 so that the frequency of the resonant signal of the stylus 10 can be changed. In this case, the modulation method of the drive signal and the modulation method of the frequency change request drive signal in the controller 2624 can be implemented in a manner such as on-off keying (OOK), amplitude shift keying (ASK), and frequency shift keying (FSK). Similarly, the modulation method of the touch signal and the demodulation method of the frequency change request drive signal in the stylus 10 can be implemented in the same manner as OOK and ASK.

[0386] Will refer to Figure 35 Describe the drive signal.

[0387] Figure 35 1 shows a driving signal of a loop coil and a resonance signal of a stylus according to an embodiment.

[0388] like Figure 35 As shown, coil driver 263 can apply a drive signal D_264 to loop coil 264. Drive signal D_264 can be an AC current having a predetermined frequency (i.e., a frequency corresponding to the resonant frequency of resonant circuit 12 of stylus 10), which oscillates between a first level IH and a second level IL, but the present invention is not limited thereto. Resonant circuit 12 then resonates due to the magnetic field generated in loop coil 264 by drive signal D_264. The signal generated by the resonance of resonant circuit 12 is transmitted to touch sensor 261 via the capacitance generated by touch sensor 261, thereby allowing touch electrode 111 and touch electrode 121 to receive sensing signals from stylus 10.

[0389] Next, we will refer to Figures 36 to 47 A foldable electronic device and a driving method according to various embodiments of the present invention are described.

[0390] Figure 36 and Figure 37 A foldable electronic device according to another embodiment is shown.

[0391] With reference Figure 24 and Figure 25Compared to the foldable electronic device described above, the same is true except that the substrate 24 is located in an area other than the folding area FA on the XY plane, and therefore a description thereof will be omitted.

[0392] Reference Figure 36 , the annular coil 264 may include a substrate 24 and a ferrite sheet 25, and the antenna loop is located on the substrate 24. Figures 38 to 41 As described, in addition to the substrate 24 , the antenna loop may also be located on the same layer as that of the touch electrode layer 21 , and in this case, the substrate 24 may not be included in the loop coil 264 .

[0393] The annular coil 264 can be located in an area other than the folding area FA on the XY plane. The annular coil 264 can include at least two sub-annular coils 24a and 24b. The sub-annular coil 24a can be located in the area between the folding area FA and the long side LS1, and the sub-annular coil 24b can be located in the area between the folding area FA and the long side LS2. Drive signals with the same or similar phases can be applied to the two sub-annular coils 24a and 24b, drive signals with opposite phases can be applied to the two sub-annular coils 24a and 24b, or the two sub-annular coils 24a and 24b can be driven selectively.

[0394] Therefore, even when the folding area FA is bent relative to the folding axis AXIS_F, the risk of damage to the annular coil 264 is further reduced.

[0395] Figures 38 to 41 A view showing an arrangement of a touch panel and a loop coil according to aspects of another embodiment is shown.

[0396] like Figure 38 As shown in FIG. 2( a ), the loop coil 264 is located below the display panel 251 . The loop coil 264 includes a plurality of sub-loop coils 24 a and 24 b and a ferrite sheet 25 .

[0397] The sub-loop coil 24a includes a base film 242a and an antenna loop 241a, and the sub-loop coil 24b includes a base film 242b and an antenna loop 241b. The sub-loop coil 24a can be located in the area between the folding area FA and the long side LS1, and the sub-loop coil 24b can be located in the area between the folding area FA and the long side LS2. Figure 38 The base films 242a and 242b in the PCB may be FPCB or rigid PCB.

[0398] like Figure 38As shown in (b), the ferrite sheet 25 may include a first sheet 25a located between the folding area FA and the long side LS1 and a second sheet 25b located between the folding area FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include a plurality of sheets, and even in this case, the ferrite sheet 25 is still located in an area other than the folding area FA on the rear surface of the display panel 251.

[0399] The antenna loop 241a of the sub-loop coil 24a may be a conductive wire extending along the boundary between the display area DP and the folding area FA at the long side LS1. The antenna loop 241b of the sub-loop coil 24b may be a conductive wire extending along the boundary between the display area DP and the folding area FA at the long side LS2. The antenna loop 241a may overlap with the area where the first sheet 25a is located on the XY plane, and the antenna loop 241b may overlap with the area where the second sheet 25b is located on the XY plane.

[0400] like Figure 39 As shown in (a), the antenna loops 241a and 241b can be directly printed on the substrate of the display panel 251 by a method such as photolithography or thin film sputtering. The method for directly forming the antenna loops 241a and 241b on the substrate of the display panel 251 is not limited to the above method.

[0401] like Figure 39 As shown in (b), the ferrite sheet 25 may include a first sheet 25a located between the folding area FA and the long side LS1 and a second sheet 25b located between the folding area FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include a plurality of sheets, and even in this case, the ferrite sheet 25 is still located in an area other than the folding area FA on the rear surface of the display panel 251.

[0402] Antenna loop 241a may be a conductive line extending along the boundary between display area DP and folding area FA at long side LS1, and antenna loop 241b may be a conductive line extending along the boundary between display area DP and folding area FA at long side LS2. Antenna loop 241a may overlap with the area where first sheet 25a is located on the XY plane, and antenna loop 241b may overlap with the area where second sheet 25b is located on the XY plane.

[0403] Next, Figure 40 In the case of an on-cell type touch sensor, a loop coil 264 is shown, which includes an antenna loop 241 located on the same layer as the touch electrode layer 21, and Figure 41 In the case of an In-cell type touch sensor, a loop coil 264 is shown including an antenna loop 241 located on the same layer as the touch electrode layer 21 .

[0404] The antenna loop 241 may be made of the same material as the first and second touch electrodes of the touch electrode layer 21. However, the antenna loop 241 may be located at a different layer from the touch electrode layer 21 and may be made of a different material from the first and second touch electrodes.

[0405] like Figure 40 (a) and Figure 41 As shown in FIG. 2( a ), the loop coil 264 includes an antenna loop 241 located on the touch electrode layer 21 and a ferrite sheet 25 located below the display panel 251 .

[0406] like Figure 40 As shown in (b), the antenna ring 241 and the touch electrode layer 21 are located in the same layer on the packaging substrate 23 of the display panel 251.

[0407] Antenna loop 241a may be a conductive line extending along the boundary between display area DP and folding area FA at long side LS1, and antenna loop 241b may be a conductive line extending along the boundary between display area DP and folding area FA at long side LS2. Antenna loop 241a may overlap with the area where first sheet 25a is located on the XY plane, and antenna loop 241b may overlap with the area where second sheet 25b is located on the XY plane.

[0408] The ferrite sheet 25 may include a first sheet 25a located between the folding area FA and the long side LS1 and a second sheet 25b located between the folding area FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include a plurality of sheets. Even in this case, the ferrite sheet 25 is still located in an area other than the folding area FA on the rear surface of the display panel 251.

[0409] like Figure 41 As shown in (b), the display panel 251 includes a touch electrode layer 21 and a loop coil 264. That is, the substrate 23 may be a color filter substrate of the display panel 251, and the touch electrode layer 21 and the antenna loop 241 may be located between the color filter substrate 23 and the TFT substrate of the display panel 251. Alternatively, the touch electrode layer 21 and the antenna loop 241 may be located both above and below the color filter substrate 23.

[0410] Antenna loop 241a may be a conductive line extending along the boundary between display area DP and folding area FA at long side LS1, and antenna loop 241b may be a conductive line extending along the boundary between display area DP and folding area FA at long side LS2. Antenna loop 241a may overlap with the area where first sheet 25a is located on the XY plane, and antenna loop 241b may overlap with the area where second sheet 25b is located on the XY plane.

[0411] The ferrite sheet 25 may include a first sheet 25a located between the folding area FA and the long side LS1 and a second sheet 25b located between the folding area FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include a plurality of sheets. Even in this case, the ferrite sheet 25 is still located in an area other than the folding area FA on the rear surface of the display panel 251.

[0412] exist Figures 38 to 40 In the figure, although the antenna loops 241a and 241b are shown as extending along the boundary between the display area DP and the folding area FA, the antenna loops 241a and 241b may be located outside the display area DP. In addition, the antenna loop 241 may be positioned so as not to overlap with the touch electrodes on the touch electrode layer 21 on the XY plane and to surround the periphery of the area where the touch electrodes are located.

[0413] In the following, reference will be made to Figures 42 to 47 describe Figure 33 and Figures 38 to 41 Operation of the touch panel and toroidal coil.

[0414] Figure 42 A portion of a touch module according to an embodiment is schematically shown.

[0415] With reference Figure 34 Compared to the foldable electronic device described above, the same is true except that the loop coils 264a and 264b are respectively located in areas other than the folding area FA, and thus a description thereof will be omitted.

[0416] The annular coil 264 a is located on the left side of the folding axis AXIS_F, and the annular coil 264 b is located on the right side of the folding axis AXIS_F. The annular coils 264 a and 264 b are connected to the coil driver 263 .

[0417] The coil driver 263 applies a driving signal to each of the annular coils 264a and 264b. The coil driver 263 may apply the driving signal differently depending on the position of the stylus pen 10 on the touch screen 20. Figures 43 to 47 To describe this.

[0418] Figure 43 shows situations where a stylus pen approaches various positions of a foldable electronic device according to another embodiment, and Figure 44 A driving signal of the loop coil and a resonance signal of the stylus according to the position of the stylus are shown.

[0419] like Figure 43As shown in (a) and (c) of FIG, when the stylus pen 10 is located in the area covered by the loop coil on the XY plane (i.e., the area between the folding area FA and the long side LS1 or the area between the folding area FA and the long side LS2), the coil driver 263 can cause the resonance circuit 12 to resonate by applying a drive signal to each of the antenna loops 241a and 241b. However, as Figure 43 As shown in (b), in a case where the stylus 10 is located in an area not covered by the annular coil on the XY plane (i.e., the folding area FA), when driving signals are applied to the antenna loops 241a and 241b, respectively, the signal generated by the resonance of the resonant circuit 12 can be attenuated, so that the reception sensitivity of the touch input detected by the touch sensor 261 can be reduced.

[0420] Therefore, if Figure 44 As shown, when the stylus 10 is located in an area not covered by the loop coil on the XY plane, that is, during section (b), the coil driver 263 applies drive signals of the same or similar phases to both antenna loops 241a and 241b. Here, the position of the stylus 10 can be determined by the touch controller 262. When the touch controller 262 enters an area not covered by the loop coil on the XY plane, the coil driver 263 can be controlled so that a drive signal such as the signal in section (b) can be applied to each of the antenna loops 241a and 241b.

[0421] Figures 45 to 47 Schematically shows that when applying Figure 44 The magnetic field generated when the driving signal is

[0422] Figure 45 shows that when applying Figure 44 The magnetic field Ba is generated when the driving signal of the signal in section (a) is 0. Since the magnetic field Ba is mainly generated by the current I_264a flowing through the loop coil 264a in the area covered by the loop coil 264a on the XY plane, the resonant circuit 12 of the stylus 10 can resonate.

[0423] Figure 46 shows that when applying Figure 44 The magnetic fields Ba, Bb, and Bc are generated when the driving signal of the signal of section (b) is used. The current I_264a flowing through the loop coil 264a and the current I_264b flowing through the loop coil 264b generate not only the magnetic fields Ba and Bc in the area covered by the loop coils 264a and 264b on the XY plane, but also the magnetic field Bb in the area not covered by the loop coils 264a and 264b on the XY plane. Therefore, the resonant circuit 12 of the stylus pen 10 can resonate.

[0424] Figure 47 shows that when applying Figure 44 The magnetic field Bc is generated when the driving signal of the signal in section (c) is 0. Since the magnetic field Bc is mainly generated by the current I_264b flowing through the loop coil 264b in the area covered by the loop coil 264b on the XY plane, the resonant circuit 12 of the stylus 10 can resonate.

[0425] Next, we will refer to Figure 48 and Figure 49 Describes an area with low receiving sensitivity within the touch sensor.

[0426] Figure 48 and Figure 49 Each shows the arrangement of a touch panel and a loop coil.

[0427] like Figure 48 As shown, touch electrodes 111 and 121 in the touch sensor are connected to traces 112 and 122 in the peripheral area at the edge of the touch area. First touch electrodes 111-1, 111-2, 111-3, ... are connected to corresponding traces 112, and second touch electrodes 121-1, 121-2, 121-3, ... are connected to corresponding traces 122.

[0428] The first touch electrodes 111-1, 111-2, 111-3, ... are longer than the second touch electrodes 121-1, 121-2, 121-3, ..., an RC delay may occur so that the trace 112 may be connected to the first and second ends of the first touch electrodes 111-1, 111-2, 111-3, ...

[0429] like Figure 49 As shown, when the current of the driving signal DS flows through the antenna loop 241 , the magnetic field generated in the center area A1 of the touch sensor and the magnetic fields generated in the corner areas C1 , C2 , C3 , and C4 of the touch sensor are different from each other.

[0430] In the center area A1 of the touch sensor, the current flowing through the antenna loop 241 is in the same direction ( Figure 12A magnetic field is generated in the -Z-axis direction (in the -Z-axis direction). The stylus 10 can be used at an angle of at least 60 degrees to the Z-axis direction. When the stylus 10 is positioned along the Z-axis direction, the coil of the inductor of the resonant circuit 12 of the stylus 10 is wound in a direction perpendicular to the Z-axis. That is, in area A1, the direction of the magnetic field (-Z-axis) and the winding direction of the coil are perpendicular to each other, so that the energy transmitted to the resonant circuit 12 is large. In contrast, in the corner areas C1, C2, C3, and C4 of the touch sensor, the direction of the magnetic field generated by the antenna loop 241 is perpendicular to the Z-axis. The direction of the coil wound around the inductor of the resonant circuit 12 is substantially parallel to the direction of the magnetic field. That is, in the corner areas C1, C2, C3, and C4, the energy transmitted to the resonant circuit 12 is less than the energy transmitted to the resonant circuit 12 in area A1.

[0431] Therefore, the amplitude of a signal output from the stylus 10 located in the corner regions C1 , C2 , C3 , and C4 of the touch sensor may be reduced, or the signal output may be stopped.

[0432] Therefore, there is a need to design an antenna module capable of improving magnetic energy transmitted to the stylus 10 located in the corner regions C1 , C2 , C3 , and C4 of the touch sensor.

[0433] The trace layer 26 can be formed in the same layer as the touch electrode layer 21. Furthermore, the trace layer 26 can be formed of a conductive material with high transmittance and low impedance, such as silver nanowires. However, the trace layer 26 can be located in a different layer from the touch electrode layer 21 and can be made of ITO or graphene, but the present invention is not limited thereto.

[0434] In addition, the antenna loop 241 is located on the base film 242. The antenna loop 241 can be printed on the base film 242 by photolithography, thin film sputtering, etc. Alternatively, the antenna loop 241 can be printed on the window 22 by photolithography, thin film deposition, etc. In addition, the sheet on which the antenna loop 241 is formed can be attached to the window 22. In addition, the antenna loop 241 can be located on the same layer as the touch electrode layer 21. In this case, the antenna loop 241 can be made of the same material as the touch electrode of the touch electrode layer 21. However, the antenna loop 241 can be located on a layer different from the layer of the touch electrode layer 21 and can be made of a material different from the material of the touch electrode. In addition, although shown as Figure 13 The touch screen 20 has one antenna loop 241, but may have two or more antenna loops 241, and the method for positioning the antenna loop 241 on the touch screen 20 is not limited to the above method.

[0435] When a touch object (e.g., a human body) touches the peripheral area of ​​the touch sensor, capacitance Cc is generated between the conductive antenna loop 241 and the touch object. Furthermore, capacitance Ct is generated between the touch object and the traces 112 and 122, and capacitance Ce is generated between the touch object and the touch electrodes 111 and 121 in the touch electrode layer 21.

[0436] When the driving signal DS is applied to the antenna loop 241 , the driving signal DS affects the traces 112 and 122 and the touch electrodes 111 and 121 through the electrical couplings Cc, Ct, and Ce.

[0437] For example, when the touch electrodes 111 and 121 receive sensing signals from the stylus 10 while the driving signal DS is applied to the antenna loop 241, noise may be generated by the driving signal DS transmitted to the touch electrodes 111 and 121 through the touch object. In addition, when the sensing signals received by the touch electrodes 111 and 121 are transmitted to the touch controller 262 through the traces 112 and 122 while the driving signal DS is applied to the antenna loop 241, noise may be generated by the driving signal DS transmitted to the traces 112 and 122 through the touch object.

[0438] Furthermore, even when a touch object is not touching, the antenna loop 241, the touch electrodes 111 and 121, and the traces 112 and 122 may electrically influence each other. For example, the touch electrodes 111 and 121 and the traces 112 and 122 may generate direct capacitive coupling with the antenna loop 241. Therefore, when a voltage of a predetermined frequency is applied to the loop coil 264, noise may be generated by the sensing signals sensed by the touch electrodes 111 and 121 or the sensing signals transmitted to the touch controller 262 through the traces 112 and 122.

[0439] In addition, when current flows in the antenna loop 241, a magnetic field (Mc) is generated, and this magnetic field may eventually generate current (e.g., eddy current) in the touch electrodes 111 and 121 and the traces 112 and 122. Therefore, through electromagnetic induction, noise may be generated by the sensing signals sensed by the touch electrodes 111 and 121 or the sensing signals transmitted to the touch controller 262 through the traces 112 and 122.

[0440] In particular, in the case of a touch electrode in which the trace 112 and the touch electrode 111 extend in the same direction, noise generated due to electromagnetic coupling may be greater. Figure 14 Describe this.

[0441] Figure 50 Shown in more detail Figure 48 The arrangement of the touch panel and the toroidal coil.

[0442] Reference Figure 50 , touch electrodes 111 - 1 , ..., and 111 - 16 are connected to traces 112 - 1 , ..., and 112 - 16 , respectively, and touch electrodes 121 - 1 , ..., and 121 - 28 are connected to traces 122 - 1 , ..., and 122 - 28 , respectively.

[0443] In this case, greater noise may be generated between the traces and the touch electrodes that are adjacent to and connected to each other.

[0444] like Figure 50 As shown, touch electrode 111-1 extending in the Y-axis direction is connected to trace 112-1 extending in the Y-axis direction. Touch electrode 111-1 and trace 112-1 are positioned adjacent to each other. That is, no other trace or touch electrode is located between touch electrode 111-1 and trace 112-1. In this case, when the length of antenna loop 241 extending in the Y-axis direction, which is located within the maximum width of touch electrode 111-1 in the X-axis direction, is greater than twice the length of touch electrode 111-1 in the Y-axis direction, both touch electrode 111-1 and trace 112-1 are affected by drive signal DS applied to antenna loop 241.

[0445] That is, when a touch object touches the area P1 where the touch electrode 111-1 and the trace 112-1 are located, the touch electrode 111-1 for receiving the sensing signal and the trace 112-1 for transmitting the received sensing signal to the touch controller 262 are both affected by the drive signal DS applied to the antenna ring 241, which is located in the area corresponding to the maximum width of the touch electrode 111-1 in the X-axis direction.

[0446] However, even when the touch object touches in area P2, the touch electrodes 111-2, ..., 111-15 and 111-16 may be affected by the drive signal DS applied to the antenna loop 241, but in the case where the traces 112-2, ..., 112-15 and 112-16 are connected to each other and are not adjacent to each other, the influence of the drive signal DS applied to the antenna loop 241 is small.

[0447] In addition, when a touch object touches adjacent to the traces 112-1, ..., 112-15, and 112-28, the touch electrodes 121-1, ..., and 121-28 may be affected by the drive signal DS applied to the antenna loop 241, but the affected areas are smaller than the affected areas of the touch electrodes 111-1, ..., and 111-16. When a touch object touches adjacent to the touch electrodes 121-1, ..., and 121-28, the touch electrodes 121-1, ..., and 121-28 may be affected by the drive signal DS applied to the antenna loop 241, but the traces 112-1, ..., 112-15, and 112-28 are less affected by the drive signal DS.

[0448] That is, the noise generated between traces and touch electrodes that are connected to each other and adjacent to each other and arranged in the same or similar directions can be greater than the noise generated between traces and touch electrodes that are connected to each other and arranged in the same or similar directions but not adjacent to each other, and between traces and touch electrodes that are connected to each other and adjacent to each other but not arranged in the same or similar directions.

[0449] The inventors have confirmed that, in a case where a trace extending in the Y-axis direction and a touch electrode are connected to each other and positioned adjacent to each other, when the length of the antenna loop extending in the Y-axis direction and overlapping with the touch electrode within the maximum width of the touch electrode in the X-axis direction is greater than twice the length of the touch electrode in the Y-axis direction, the noise caused by driving the antenna loop is greater than the standard touch signal for the touch electrode.

[0450] Therefore, it is necessary to design an antenna module that can reduce this noise.

[0451] Figures 51 to 55 A view showing an arrangement of a touch panel and a loop coil according to various aspects of an embodiment is shown.

[0452] Assumptions Figures 51 to 55 The arrangement of the touch electrodes 111 and 121 and the traces 112 and 122 is similar to Figure 48 and Figure 50 The touch sensors shown are identical. The antenna loop 241 is shown with solid or dashed lines to indicate that the antenna loop 241 can be located on different layers.

[0453] exist Figures 51 to 55In the embodiment, the length of a portion of antenna loop 241 extending in the Y-axis direction while overlapping with touch electrode 111-1 within the maximum width of touch electrode 111-1 in the X-axis direction (i.e., a portion of antenna loop 241 in region P1 where trace 112-1 extending in the Y-axis direction and touch electrode 111-1 are connected and positioned adjacent to each other) is less than twice the length of touch electrode 111-1 in the Y-axis direction. In other words, the density of antenna loops 241 located in region P1 is less than the density of antenna loops 241 located in region P2. Here, the density is assumed to be the overlapping length of the touch electrode and antenna loop 241 extending in the same direction on the XY plane.

[0454] Reference Figure 51 and Figure 52 The Y-axis length of antenna loop 241, which extends in the Y-axis direction and overlaps touch electrode 111-1 extending in the Y-axis direction, is equal to or less than 1 times the Y-axis length of touch electrode 111-1. Since antenna loop 241 is wound, a first winding of antenna loop 241 located in region P1 and a second winding of antenna loop 241 adjacent to region P1 can be located on different touch electrodes in the Y-axis direction.

[0455] like Figure 51 As shown, the spacing between the first winding and the second winding of the antenna loop 241 (the spacing in the X-axis direction) can be substantially equal to the minimum spacing between the second winding and the third winding of the antenna loop 241 .

[0456] like Figure 52 As shown, the spacing between the first winding and the second winding of the antenna loop 241 can be greater than the minimum spacing between the second winding and the third winding of the antenna loop 241. The spacing between the first winding of the antenna loop 241 and the second winding of the antenna loop 241 can be substantially equal to the minimum spacing between the third winding and the fourth winding of the antenna loop 241.

[0457] Reference Figure 53 and Figure 54 The Y-axis length of the antenna loop 241 extending in the Y-axis direction and overlapping with the touch electrode 111 - 1 extending in the Y-axis direction is less than twice the Y-axis length of the touch electrode 111 - 1 .

[0458] like Figure 53 As shown, the antenna ring 241 may include a first portion extending in the Y-axis direction and a first portion repeating along the Y-axis direction. In this case, a portion of the second portion may be located in region P1. That is, a portion of the second portion may overlap with the touch electrode 111-1 extending in the Y-axis direction.

[0459] like Figure 54 As shown, the antenna ring 241 may have a structure symmetrically positioned in the form of a first portion and a second portion, wherein the first portion extends in the Y-axis direction and the second portion repeats along the Y-axis direction. In this case, a portion of the second portion may be located in the region P1. That is, a portion of the second portion may overlap with the touch electrode 111-1 extending in the Y-axis direction.

[0460] Reference Figure 55 , multiple antenna loops 241a and 241b may be positioned. The sum of the Y-axis length of the antenna loop 241a extending in the Y-axis direction and overlapping the touch electrode 111-1 extending in the Y-axis direction and the Y-axis length of the antenna loop 241b extending in the Y-axis direction and overlapping the touch electrode 111-1 extending in the Y-axis direction is equal to or less than 1 times the length of the touch electrode 111-1 in the Y-axis direction.

[0461] The driving signal may be applied to each of the antenna loops 241a and 241b independently of each other. Therefore, when the driving signal is applied only to the antenna loop 241a or the antenna loop 241b, the influence on the touch electrode 111-1 and the trace 112-1 may be further reduced.

[0462] Will refer to Figure 56 The noise reduction effect in the case of using the antenna loop 241 according to one embodiment of the present invention is described.

[0463] Figure 56 Graphs comparing touch signals and noise signals according to an example and a comparative example are shown.

[0464] The Y-axis represents the amplitude of the signal sensed by each touch electrode, and the X-axis represents the serial number of the touch electrodes. It will be described that the first electrode is the touch electrode 111-1 and the 16th electrode is the touch electrode 111-16.

[0465] It will be described in Figure 50 2010 and 2012 are detected in the structure of antenna loop 241 shown. Since the difference between noise signal 2010 and touch signal 2012 detected by touch electrodes 111-2, ..., and 111-16 is greater than or equal to the threshold, touch controller 262 can detect touch signal 2012 as touch input. However, in the case of first electrode 111-1, since the amplitude of touch signal 2012 is smaller than the amplitude of noise signal 2020, touch controller 262 cannot detect touch signal 2012 as touch input.

[0466] It will be described in Figures 51 to 55Signals 2020 and 2022 are detected in the structure of the antenna loop 241. Since the amplitude of the touch signal 2022 detected by the touch electrodes 111-1, ..., and 111-16 is greater than the amplitude of the noise signal 2020, the touch controller 262 can detect the touch signal 2022 as a touch input.

[0467] Next, we will refer to Figures 57 to 59 An antenna module capable of improving magnetic energy transmitted to the stylus 10 located in the corner regions C1 , C2 , C3 , and C4 of the touch sensor is described.

[0468] Figures 57 to 60 A view showing an arrangement of a touch panel and a loop coil according to aspects of another embodiment is shown.

[0469] exist Figure 57 and Figure 58 , the number of windings of the antenna loop 241 in the corner regions C1 , C2 , C3 , and C4 is greater than the number of windings in the other regions.

[0470] like Figure 57 As shown, the antenna loop 241 may be wound twice in the corner regions C1 and C2 adjacent to each other and in the corner regions C3 and C4 adjacent to each other, as shown in FIG. Figure 58 As shown, the antenna loop 241 may be wound twice in each of the corner regions C1 , C2 , C3 , and C4 .

[0471] In addition, if Figure 58 As shown, after winding in each of the corner regions C1 , C2 , C3 , and C4 , winding may be further performed once in the center region.

[0472] The magnetic energy transmitted to the stylus 10 located in the corner regions C1 , C2 , C3 , and C4 may be improved by the structure of increasing the number of windings in the corner regions C1 , C2 , C3 , and C4 as described above.

[0473] Reference Figure 59 The corner pattern 241x may be located in the corner regions C1, C2, C3, and C4 to generate a magnetic field in the vertex directions P1, P2, P3, and P4 in the corner regions C1, C2, C3, and C4. The corner pattern 241x has a pattern that repeats in a zigzag manner in each of the corner regions C1, C2, C3, and C4.

[0474] Reference Figure 60 When the base film 242 is a double-sided PCB, the corner patterns 241x may be alternately located on opposite surfaces of the base film 242. When the base film 242 is a multi-layer PCB, the corner patterns 241x may be located on multiple layers of the base film 242. This will implement a solenoid as the corner pattern 241x.

[0475] The solenoid implemented as the corner pattern 241x can generate a magnetic field in the vertex direction or a combination of the vertex direction and the Z-axis direction. Therefore, the antenna loop 241 can enhance the magnetic energy even when the stylus 10 is tilted in the vertex direction in the corner regions C1, C2, C3, and C4.

[0476] According to these embodiments, there are advantages in that the reception sensitivity of a touch input can be improved and the touch position can be calculated more accurately.

[0477] According to these embodiments, there is the advantage that the energy transmitted to the stylus in the corner regions of the antenna ring can be increased.

[0478] Next, we will refer to Figure 61 and Figure 62 An example of transmitting and receiving signals between a stylus pen and an electronic device according to an embodiment is described.

[0479] Figure 61 and Figure 62 Each shows a schematic circuit diagram of a display stylus and an electronic device.

[0480] Figure 61 The resonant circuit 12 can be represented as an equivalent circuit including a resistor Rp, an inductor Lp, and a capacitor Cp or an equivalent circuit including a resistor Rs, an inductor Ls, and a capacitor Cs.

[0481] like Figure 61 and Figure 62 As shown, when the loop coil and the internal capacitor resonate via the power supply 40 transmitting the driving signal, the resonant circuit 12 of the stylus 10 may also resonate with the loop coil and the internal capacitor.

[0482] Figure 61 The case is shown where the loop coil Ldp and the internal capacitor Cdp are connected in parallel, and the resistor Rp, the inductor Lp, and the capacitor Cp of the resonance circuit 12 are connected in parallel.

[0483] Figure 62 The case is shown where the loop coil Ldp and the internal capacitor Cdp are connected in parallel, and the resistor Rs, the inductor Ls, and the capacitor Cs of the resonance circuit 12 are connected in series.

[0484] exist Figure 61 and Figure 62 In FIG. 4 , when the blocking capacitor Cb is not connected in series with the resonance circuit 42 , the magnetic field generated by the driving signal is as follows.

[0485] [Equation 1]

[0486]

[0487] The change in the magnetic field generated by the resonant circuit 42 generates an induced electromotive force as shown in the following equation 2.

[0488] [Equation 2]

[0489]

[0490] In Equation 1, when a magnetic field is induced by an electric field, both the AC current and the DC current contribute to the induced magnetic field. However, in Equation 2, when an electric field is induced by a magnetic field, only the magnetic field that changes with time induces the electric field. Therefore, although the current J that is the DC component of Equation 1 does not contribute to the induced electromotive force of the resonant circuit 12, this current J also consumes power.

[0491] Therefore, it is possible to prevent a DC component current from flowing through the resonance circuit 42 by connecting the blocking capacitor Cb in series with the resonance circuit 42 as shown in the following Equation 3.

[0492] [Equation 3]

[0493]

[0494] Therefore, the power consumption of the resonance circuit 42 can be reduced.

[0495] Next, we will refer to Figure 63 An example of the loop coil 264 and the coil driver 263 of the electronic device 2 according to an embodiment is described.

[0496] Figure 63 An antenna module and a stylus according to an embodiment are shown.

[0497] Reference Figure 63 The loop coil 264 located on the side of the touch sensor 261 and the capacitor Cdp form a resonant circuit. The resonant circuit is connected in series with the blocking capacitor Cb.

[0498] The resonant circuit 12 of the stylus pen can generate resonance by receiving energy as a magnetic field generated by a driving signal of a predetermined frequency applied by the power supply 40 from the loop coil 264. Then, the stylus pen can transmit a touch input signal to the touch sensor 261 by using the resonant energy. For example, Figure 3 (a) The stylus 10a and Figure 3 The stylus 10b in (b) can transmit the resonant signal from the resonant circuit 12 to the touch sensor 261 as a touch input. Figure 3 In the stylus 10 c of (c), the active stylus module 60 may generate a signal by using power generated by a resonant signal in the resonant circuit 12 and may transmit the signal to the touch sensor 261 .

[0499] Next, we will refer to Figure 64 and Figure 65 The change in the amplitude of the resonance signal based on the magnetic field increased by applying a driving signal is described.

[0500] Figure 64 shows the drive signal applied to the toroidal coil by the coil driver and the resonant signal of the stylus, Figure 65 1 and 2 illustrate a driving signal applied by a coil driver to a loop coil and a resonance signal of a stylus according to an embodiment.

[0501] like Figure 64 As shown, the coil driver 263 can apply a drive signal to each of the two ends of the toroidal coil 264. The second end of the toroidal coil 264 is grounded, and a drive signal (i.e., a voltage having a predetermined frequency) is applied to the first end of the toroidal coil 264. Since voltages with different amplitudes (the voltage difference between the two ends = (Vb-Va)) are applied to the two ends of the toroidal coil 264, a current Id flows in the toroidal coil 264. The current intensity changes according to the voltage change, but the current direction does not change. As shown in the above equation 1, the change in current (current intensity) generates a magnetic field around the toroidal coil 264.

[0502] As in Equation 2, the change in the magnetic field induces an induced electromotive force in the resonant circuit 12 .

[0503] The peak-to-peak (PP) voltage of the resonance signal generated by the induced electromotive force in the resonance circuit 12 is V0.

[0504] Reference Figure 65 , driving signals with opposite phases to each other are applied to both ends of the toroidal coil 264. In this case, the PP voltage of the driving signal is Vb-Va, which is Figure 64 The PP voltage of the driving signal applied to the loop coil 264 is the same. Since voltages with different amplitudes (voltage difference between the two ends = 2*(Vb-Va)) are applied to the two ends of the loop coil 264, the current Id flows in the loop coil 264. As the voltage changes, the current intensity and direction also change.

[0505] As shown in Equation 1 above, the change in current (current intensity) generates a magnetic field around the toroidal coil 264. As shown in Equation 2, the change in the magnetic field induces an electromotive force in the resonant circuit 12. The PP voltage of the resonant signal generated by the induced electromotive force in the resonant circuit 12 is V1 (V1>V0).

[0506] A higher-intensity AC current produces a larger change in the magnetic field, which in turn induces a larger induced electromotive force. The electronic device control method of the present invention amplifies the magnetic field generated in the coil by simultaneously applying drive signals of opposite phases to both ends of the toroidal coil 264, even when using the same voltage.

[0507] That is, according to the electronic device control method of the present invention, the energy transmitted to the resonant circuit 12 of the stylus 10 can be increased through the coil driver 263 without increasing the PP voltage.

[0508] Next, a case will be described where the coil driver 263 includes a blocking capacitor Cb and an applied capacitor Cb is used in the coil driver 263. Figure 65 The driving signal method.

[0509] Figure 66 Specifically shown Figure 65 Coil driver.

[0510] Reference Figure 66 , the toroidal coil Ldp is connected in parallel to the internal capacitor Cdp, a first electrode of the blocking capacitor Cb1 is connected to the first electrode of the internal capacitor Cdp, and a first electrode of the blocking capacitor Cb2 is connected to the second electrode of the internal capacitor Cdp.

[0511] Drive signals having different phases (e.g., opposite phases) are applied to the second electrode of the blocking capacitor Cb1 and the second electrode of the blocking capacitor Cb2, respectively. For example, the phase of the drive signal applied to the second electrode of the blocking capacitor Cb1 and the phase of the drive signal applied to the second electrode of the blocking capacitor Cb2 are opposite to each other.

[0512] As reference Figure 65 As described, by simultaneously applying drive signals of opposite phases to both ends of the loop coil 264, even with the same voltage, there is an effect of amplifying the magnetic field generated in the coil.

[0513] Furthermore, it is possible to prevent a DC component current from flowing through the resonance circuit 42 by connecting the blocking capacitors Cb1 and Cb2 to the resonance circuit 42 , as shown in the above-described Equation 3.

[0514] According to the above description, the power consumption of the antenna module and the electronic device including the antenna module can be reduced, and the energy transmitted to the stylus can be increased, and the following effect is achieved: the power required for using the stylus can be transmitted while using the stylus without the need for separate wireless charging.

[0515] Figures 67 to 69 Each shows the arrangement of a touch sensor and a loop coil.

[0516] like Figure 67 As shown, the loop coil 264 may be positioned around the periphery of the touch sensor 261 without overlapping the touch sensor 261. The current I having an AC waveform as a driving signal D Applied to the toroidal coil 264 .

[0517] like Figure 68 As shown, the loop coil 264 may be located in a region overlapping the touch sensor 261. The current I having an AC waveform as a driving signal D Applied to the toroidal coil 264 .

[0518] like Figure 69 As shown, the loop coil 264 may include a plurality of sub-loop coils 2640, 2641, 2642, and 2643. The sub-loop coils 2640, 2641, 2642, and 2643 may be located in a region overlapping with the touch sensor 261, but the present invention is not limited thereto. The current I D0 , I D1 , I D2 and I D3 Applied to sub-toroidal coils 2640, 2641, 2642 and 2643 respectively.

[0519] Figures 70 to 74 Each shows a state where the stylus pen is close to the electronic device.

[0520] like Figures 70 to 74 As shown, the stylus pen 10 and the touch screen 20 may be close to each other.

[0521] Figures 70 to 74 The stylus pen 10 may generate a touch input (a resonant signal or an active touch signal) by resonating with a driving signal applied to the touch electrode of the touch electrode layer 21 .

[0522] Figures 70 to 74 The touch screen 20 includes a display panel 251 and a touch sensor 261 on the display panel 251. The touch sensor 261 may include a substrate 23, touch electrodes of a touch electrode layer 21 on the substrate, and a window 22 on the touch electrodes of the touch electrode layer 21.

[0523] The substrate 23 may be a packaging substrate of the display panel 251 , and may be implemented by a transparent material.

[0524] The touch electrodes of the touch electrode layer 21 may include: a plurality of first touch electrodes, each of which extends in a first direction and is arranged in a second direction intersecting the first direction; and a plurality of second touch electrodes, each of which extends in the second direction and is arranged in the first direction. Although the touch electrodes of the touch electrode layer 21 are shown as a single layer in the figure, the first touch electrodes and the second touch electrodes may be located on different layers, but the present invention is not limited thereto.

[0525] The window 22 may be located on the touch electrode of the touch electrode layer 21. The touch electrode of the touch electrode layer 21, the conductive tip 11, and the window 22 may form a capacitance Cx. Therefore, the signal (resonance signal or active touch signal) generated by the stylus 10 may be transmitted to the touch electrode of the touch electrode layer 21.

[0526] like Figures 70 to 74 As shown, the resonant circuit 12 can resonate with the loop coil 264 , and the degree of mutual resonance between the inductor of the resonant circuit 12 and the loop coil 264 is affected by the mutual inductance M. Alternatively, the resonant circuit 12 can resonate with the magnetic field generated by the loop coil 264 .

[0527] like Figure 71 、 Figure 72 and Figure 73 As shown, the loop coil 264 may be located in a region that does not overlap with the touch sensor 261 .

[0528] Reference Figure 71 The annular coil 264 may be printed on the window 22 by a method such as photolithography, thin film sputtering, etc., or the annular coil 264 may be printed on a sheet and attached to the window 22 by a method such as photolithography, thin film sputtering, etc. The method for positioning the annular coil 264 on the window 22 is not limited to the above method.

[0529] Figure 72 In the case of an on-cell type touch sensor, the arrangement of the loop coil 264 is shown, and the loop coil 264 is located in the same layer as the touch electrode layer of the touch electrode layer 21, and Figure 73 In the case of an In-cell type touch sensor, the arrangement of the loop coil 264 is shown, and the loop coil 264 is located in the same layer as the touch electrode layer of the touch electrode layer 21 .

[0530] Reference Figure 72 and Figure 73, the loop coil 264 may be located in the same layer as the touch electrode layer of the touch electrode layer 21. The loop coil 264 may be made of the same material as the touch electrode layer 21. However, the loop coil 264 may be located in a different layer from the touch electrode layer of the touch electrode layer 21 and may be made of a different material.

[0531] exist Figure 72 In the embodiment, the loop coil 264 and the touch electrodes of the touch electrode layer 21 are located in the touch electrodes on the package substrate 23 of the display panel 251 .

[0532] exist Figure 73 , the display panel 251 includes the touch electrodes of the touch electrode layer 21 and the loop coil 264. That is, the substrate 23 may be the color filter substrate of the display panel 251, and the touch electrodes of the touch electrode layer 21 and the loop coil 264 may be located between the color filter substrate 23 and the TFT substrate of the display panel 251. Alternatively, the touch electrodes of the touch electrode layer 21 and the loop coil 264 may be located both above and below the color filter substrate 23.

[0533] like Figure 74 and Figure 75 As shown, the loop coil 264 may be located in an area overlapping with the touch sensor 261. The loop coil 264 may be directly printed on the substrate of the display panel 251 by a method such as photolithography or thin film sputtering, or may be printed on a sheet by a method such as photolithography or thin film sputtering and attached to the substrate of the display panel 251. The method for positioning the loop coil 264 on the substrate of the display panel 251 is not limited to the above method.

[0534] like Figure 74 As shown, the loop coil 264 may be located only near the housing of the touch sensor 261, or as shown in FIG. Figure 75 As shown, the loop coil 264 may be positioned to correspond to the entire area of ​​the touch sensor 261 .

[0535] In addition, the loop coil 264 may be located in a layer different from the layer of the touch electrodes of the touch electrode layer 21. However, as Figure 71 and Figure 72 As shown, the loop coil 264 may be located at the same layer as the touch electrodes of the touch electrode layer 21 in the region overlapping the touch sensor 261 and may be made of the same material.

[0536] Figure 75 and Figure 76 Each shows a state in which the stylus pen approaches the electronic device to send and receive signals.

[0537] like Figure 75As shown, when a driving signal is applied to the loop coil 264, the resonance circuit 12 resonates by the magnetic field B generated thereby.

[0538] Then, if Figure 76 As shown, the signal RS from the stylus pen 10 may be directly transmitted from the conductive tip 11 to the touch electrode of the touch electrode layer 21 , or may be transmitted to the touch electrode of the touch electrode layer 21 through the air or a non-conductive housing.

[0539] Figure 77 Shown specifically Figure 3 stylus and Figure 2 Schematic diagram of the electronic device.

[0540] The stylus 10 includes a conductive tip 11, a resonant circuit 12, and a housing 19. The resonant circuit 12 includes a capacitor portion 113 and an inductor portion 114. The housing 19 includes a grip portion 19a adjacent to the tip 11 and a body portion 19b spaced apart from the tip 11.

[0541] The capacitor section 113 may include a plurality of capacitors connected in parallel. These capacitors may have different capacitances and may be adjusted during the manufacturing process.

[0542] The inductor portion 114 includes a ferrite core 115 and a coil 116 wound around the ferrite core 115 .

[0543] The capacitor portion 113 and the inductor portion 114 are connected in parallel, and a resonance signal is generated by LC resonance between the capacitor portion 113 and the inductor portion 114 in response to a driving signal.

[0544] Figure 78 Shown specifically Figure 77 Schematic diagram of the inductor portion of the stylus.

[0545] Reference Figure 78 , the inductor portion 114 includes a ferrite core 115 and a coil 116 wound around the ferrite core 115 .

[0546] In this case, the inductance of the inductor portion 114 is determined by the following Equation 4.

[0547] [Equation 4]

[0548]

[0549] As can be seen from Equation 4, the inductance is proportional to the magnetic permeability of the ferrite core 115 , the cross-sectional area of ​​the coil 116 , and the square of the number of turns, and is inversely proportional to the winding length of the coil 116 .

[0550] The design of the inductor portion 114 is very important in the resonant circuit 12 housed in the stylus.

[0551] Figure 79 The inductance and Q value are shown as a function of frequency.

[0552] like Figure 79 As shown, in the design of the inductor unit 114, the inductance L and the Q value are very important parameters. Here, the Q value is a quantity that represents the characteristics of the coil as a resonant circuit element and is expressed by the equation In addition, L and R represent the inductance and resistance of the coil, respectively, and f represents the frequency. The higher the Q value, the sharper the resonant characteristic.

[0553] In the stylus design, L must have a self-resonant frequency sufficiently large relative to the intended frequency, and the Q value must be maximized at the intended frequency. To achieve this, it was necessary to optimize the ferrite core material, coil wire type, and winding scheme. Furthermore, a method was required to achieve a high output signal while maintaining a thin stylus diameter.

[0554] In the following embodiments, a design method for a stylus pen that optimizes various ferrite core materials, coil wire types, and winding schemes will be described.

[0555] (1) Ferrite core material

[0556] In one example, manganese (Mn) and nickel (Ni) are used as ferrite core materials.

[0557] (2) Wire type

[0558] In the examples, enameled wires and litz wires are used as the types of wires for the coils used.

[0559] Figure 80 and Figure 81 Enameled wire and stranded wire are shown separately.

[0560] like Figure 80 As shown, enameled wire 100 is an electric wire made by coating the surface of copper wire 101 with insulating enamel 102 and heating it to a high temperature. It is used for winding and wiring electronic equipment, communication equipment, and electronic instruments. In this example, an enameled wire with a total thickness T of 0.2 mm, a wire diameter Φ of 0.18 mm, and a coating thickness t of 0.01 mm is used.

[0561] like Figure 81 As shown, the litz wire 200 is a special insulated wire made by twisting together multiple strands of thin insulated wire 100 (e.g., enameled wire) with a diameter of approximately 0.1 mm into a single wire and applying an insulating coating 201 made of nylon, etc. The litz wire 200 can reduce the skin effect by increasing the surface area and is used for coils in high-frequency circuits, etc.

[0562] In the example, a stranded wire having a total thickness T of 0.2 mm, a wire diameter Φ of 0.06 mm, and a coating thickness t of 0.007 mm is used.

[0563] (3) Winding scheme

[0564] In an example of the present invention, a winding scheme of a multi-layer winding structure is used to obtain a sufficient inductance value (ie, a sufficient number of turns) in the limited space of the stylus. Figure 82 As shown in (A) and (B), two multilayer winding schemes were used.

[0565] Figure 82 A multi-layer winding scheme is shown.

[0566] Figure 82 The winding scheme of (A) is the simplest winding scheme, which is a continuous layer winding scheme in which the upper layer is wound after the lower layer arranged immediately below it is wound. In this case, Figure 82 The scheme of (A) is a scheme in which the winding of one layer starts at a position where the winding of the previous layer arranged immediately below it ends, and is hereinafter referred to as a U-shaped winding scheme.

[0567] Figure 82 The winding scheme of (B) is an alternating layer winding scheme, wherein adjacent winding layers are alternately wound so that the windings of adjacent layers are wound in a zigzag manner. Hereinafter, this is referred to as a zigzag winding scheme. This zigzag winding scheme can minimize the voltage difference between the windings of adjacent layers, thereby reducing the winding self-capacitance. In this case, the winding self-capacitance (a parasitic capacitance) is a parameter representing the electric field energy stored in the winding.

[0568] Comparative experiment 1 (comparison of characteristic values ​​of each material)

[0569] The material of the ferrite core was changed to manganese, nickel, and magnesium, and the Q value was measured in a state where an enameled wire was used as the electric wire type of the coil and was wound by a U-type winding scheme.

[0570] As a result of the measurement, the difference between the characteristics of the Q value was small for each core material, and the measured Q value was insufficient to be implemented as a product.

[0571] Comparative Experiment 2 (Comparison of characteristic values ​​of each type of winding)

[0572] In a state where a ferrite core was wound with manganese (Mn) through a U-shaped winding scheme, Q values ​​were measured for inductors 1 and 2 manufactured using an enameled wire and a stranded wire, respectively.

[0573] Figures 83 to 85 A graph showing the results of a comparative experiment is shown.

[0574] Figure 83 The Q values ​​of the inductors 1 and 2 measured by an E4980A precision inductance capacitance resistance (LCR) meter manufactured by KEYSIGHT TECHNOLOGIES while changing the frequency are shown.

[0575] exist Figure 83 In the figure, a represents a waveform showing the change in Q value relative to the frequency of inductor 1 (manganese core / enameled wire / U-shaped winding scheme), and b represents a waveform showing the change in Q value relative to the frequency of inductor 2 (manganese core / stranded wire / U-shaped winding scheme).

[0576] In the inductor 2 made of stranded wire, the Q value has almost a maximum at a frequency of approximately 400 kHz (frequency f1 ), and in the inductor 1 made of enameled wire, the Q value has almost a maximum at a frequency of approximately 150 kHz (frequency f2 ).

[0577] As a comparison Figure 83 From the results of a and b, it can be seen that the maximum Q value of inductor 2 is about 1.5 times higher than that of inductor 1. Therefore, it can be seen that as the coil of the inductor forming the resonant circuit of the stylus, litz wire is superior to enameled wire.

[0578] However, the maximum Q value of the inductor 2 measured in the comparative experiment 2 is the target value Q required for commercial use. target About 1 / 2 of.

[0579] Comparative Experiment 3 (Comparison of characteristic values ​​of each winding scheme)

[0580] In a state where the ferrite core is made of manganese (Mn), Q values ​​were measured for inductors 3 to 5 manufactured by changing the wire type to an enameled wire and a stranded wire and changing the winding scheme to a U shape and a zigzag shape.

[0581] Figure 84 Shown are Q values ​​of inductors 3 to 5 measured by an E4980A precision LCR meter manufactured by KEYSIGHT TECHNOLOGIES while varying the frequency.

[0582] exist Figure 84 In the figure, a represents a waveform showing the change of Q value relative to the frequency of inductor 3 (manganese core / enameled wire / U-shaped winding scheme), b represents a waveform showing the change of Q value relative to the frequency of inductor 4 (manganese core / enameled wire / zigzag winding scheme), and c represents a waveform showing the change of Q value relative to the frequency of inductor 5 (manganese core / twisted wire / zigzag winding scheme).

[0583] from Figure 84As can be seen from waveform c, in inductor 5 manufactured using the twisted wire / zigzag winding scheme, the Q value has almost a maximum value at a frequency of approximately 300 kHz (frequency f3). In inductor 4 manufactured using the enameled wire / zigzag winding scheme and inductor 3 manufactured using the enameled wire / U-type winding scheme, the Q value has almost a maximum value at a frequency of approximately 150 kHz (frequency f2).

[0584] In addition, as a comparison Figure 84 From the results of a, b, and c, it can be seen that the maximum Q value of inductor 5 is about 1.5 times higher than the maximum Q value of inductor 4 and 2 times or more higher than the maximum Q value of inductor 3. Therefore, it can be seen that the zigzag shape is superior to the U shape as a winding scheme of the inductor forming the resonant circuit of the stylus.

[0585] However, the maximum Q value of inductor 5 (manganese core / litter wire / zigzag winding scheme) measured in comparative experiment 2 is the target value Q required for commercial use. target About 3 / 4 of it.

[0586] Comparative Experiment 4 (Comparison of characteristic values ​​of each core material)

[0587] In an example, manganese and nickel are used as ferrite core materials, and it is known that the magnetic permeability of nickel is generally 200 to 300 and the magnetic permeability of manganese is generally 3000 to 5000.

[0588] Since the magnetic permeability of manganese used in the example is about 15 times higher than that of nickel (assuming the coil has the same cross-sectional area and length), in order to obtain the same inductance value, the number of turns of manganese is reduced to about one-quarter of the number of turns of nickel. Therefore, from the perspective of the number of turns alone, it can be seen that the use of manganese is more efficient than nickel.

[0589] On the other hand, since the inductor portion 114 has a complex structure including a coil wound around a core, parasitic capacitance is also generated. Since the Q value is reduced due to the parasitic capacitance, the amplitude of the resonance signal may be reduced.

[0590] Parasitic capacitance generated in the inductor portion 114 may occur between the wound coils and between the core and the coils, and as described above, the parasitic capacitance between the wound coils may be reduced by adopting a zigzag winding scheme.

[0591] Meanwhile, in the example, core materials with a lower permittivity than manganese were tested to reduce the parasitic capacitance between the core and the coil, and the test results confirmed that nickel core is the best material for the ferrite core.

[0592] An important physical property of manganese and nickel, which are primarily used as ferrite core elements, is magnetic permeability, which significantly affects the inductance value shown in Equation 4. However, for manganese and nickel, which are ferrite elements, permittivity is an insignificant physical property, and in fact, relevant information for nickel is completely absent in manufacturer data sheets.

[0593] In this example, the permittivity of manganese and nickel was measured using a KEYSIGHT TECHNOLOGIES E4980A precision LCR meter to determine the permittivity of manganese and nickel. The measurement results are shown in Table 1 below.

[0594] [Table 1]

[0595] Permittivity of manganese Permittivity of nickel Measurement 1 2400 - Measurement 2 8300 2

[0596] Measurements 1 and 2 were performed using the same KEYSIGHT TECHNOLOGIES E4980A precision LCR meter. Measurement 1 represents the permittivity automatically calculated by the measurement software. According to Measurement 1, although the permittivity of manganese was 2400, the permittivity of nickel was not measured. Measurement 2, which calculates the permittivity by measuring the capacitance, area, and distance between the ferrite cores, showed that the permittivity of manganese was 8300 and the permittivity of nickel was 2. There was a significant difference in the permittivity results between Measurements 1 and 2. In the case of Measurement 2, it was confirmed that the error was considerable depending on the capacitance, area, distance, etc. However, the results of Measurements 1 and 2 show that the permittivity of nickel is 1 / 1000 or less of that of manganese.

[0597] In Comparative Experiment 4, in the case where the ferrite core was made of nickel and litz wire was used as the electric wire type, Q values ​​were measured for inductors 6 and 7 manufactured by changing the winding type to U-shape and zigzag shape.

[0598] Figure 85 Shown are Q values ​​of inductors 6 and 7 measured by an E4980A precision LCR meter manufactured by KEYSIGHT TECHNOLOGIES while changing the frequency.

[0599] exist Figure 85 In the figure, a represents a waveform showing the change of Q value relative to the frequency of inductor 6 (nickel core / twisted wire / U-shaped winding scheme), and b represents a waveform showing the change of Q value relative to the frequency of inductor 7 (nickel core / twisted wire / zigzag winding scheme).

[0600] from Figure 85As can be seen from waveform b, in inductor 7 manufactured using the nickel core / litter wire / zigzag winding scheme, the Q value has almost a maximum value at a frequency of approximately 400 kHz (frequency f5). In inductor 6 manufactured using the nickel core / litter wire / U-shaped winding scheme, the Q value has almost a maximum value at a frequency of approximately 200 kHz (frequency f6). Figure 85 From the results of a and b, it can be seen that the maximum Q value of inductor 7 is approximately twice as high as the maximum Q value of inductor 6.

[0601] The maximum Q value of inductor 7 (nickel core / litter wire / zigzag winding scheme) measured in comparative experiment 4 almost reaches the target value Q required for commercial use. target .

[0602] In the above-mentioned comparative experiments 1 to 4, inductors were manufactured and their Q values ​​were tested by changing the material of the ferrite core, the wire type of the coil, and the winding scheme. The test results showed that the highest Q value was obtained when the inductor portion of the stylus was designed by winding a nickel core, twisted wire, and a zigzag winding scheme. In addition, it can be seen that the maximum Q value of the inductor manufactured by this combination reached the target value Q for commercial use. target .

[0603] Meanwhile, in the present embodiment, a nickel core is used as the ferrite core and a stranded wire is used as the core wire type, but similar results can be obtained when a material with a dielectric constant less than or equal to 1000 is used as the ferrite core instead of the nickel core and a single wire wrapped with two or more strands of insulating wire is used instead of the stranded wire.

[0604] In this embodiment, as described below, in addition to using nickel having a lower dielectric constant than manganese, a method of increasing the distance between the core and the coil by providing a bobbin between the core and the coil can be used to further reduce the parasitic capacitance between the core and the coil.

[0605] Figure 86 Another example of an inductor section is shown.

[0606] Reference Figure 86The inductor portion 114 includes a ferrite core 115, a bobbin 141 surrounding at least a portion of the ferrite core 115, and a coil 116 wound around at least a portion of the bobbin 141. The bobbin 141 can be fixed by closely adhering the bobbin 141 to the ferrite core 115 using the force generated by the winding of the coil 116. The bobbin 141 can include the same material as the material of the housing 19 or a different material, and can include, for example, plastic or a metal with an insulating surface. Specifically, polyphenylene sulfide (PPS), liquid crystal polyester (LCP), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), phenolic resin, etc. can be used for the bobbin 141.

[0607] Therefore, when the bobbin 141 surrounds the ferrite core 115 and the bobbin 141 is wound by the coil 116, the distance between the ferrite core 115 and the coil 116 increases, so that Figure 86 The value of the parasitic capacitance Cp2 in the Figure 78 The value of the parasitic capacitance Cp1 in is small.

[0608] Figure 87 and Figure 88 A graph showing the amplitude of a resonance signal according to the structure of the inductor part is shown.

[0609] Reference Figure 87 , when the inductor portion 114 includes only the ferrite core 115 and the coil 116, the maximum amplitude of the measured resonance signal is about 2V (+1V to -1V). Figure 88 When the inductor portion 114 includes the ferrite core 115, the bobbin 141, and the coil 116, the maximum amplitude of the measured resonance signal is about 4 V (+2 V to -2 V). That is, when at least a portion of the ferrite core 115 is wound around the bobbin 141 and the coil 116 is wound around the bobbin 141, it is confirmed that the amplitude of the resonance signal is greater.

[0610] Meanwhile, when designing an optimal inductor portion using nickel as the ferrite core according to this embodiment, as described above, the magnetic permeability of nickel is 1 / 15 of that of manganese. Therefore, to obtain the same inductance, the number of nickel turns must be increased to approximately four times that of manganese. Therefore, to obtain the same inductance as manganese, the diameter of nickel must be larger than that of manganese.

[0611] In this embodiment, a method of using multiple inductors is proposed to obtain a high output signal while reducing the diameter of the stylus.

[0612] Figure 89 and Figure 90 Other examples of resonant circuits are shown.

[0613] Figure 89An equivalent circuit is shown in which two thin-diameter inductors are connected in series and a capacitor is connected in parallel across the two inductors. Hereinafter, this type of resonant circuit is referred to as an "LLC resonant circuit." Figure 89 In the example, two inductors are connected in series, but the embodiment is not limited thereto; three or more inductors may be connected in series. In this LLC resonant circuit, since the inductance L is twice as large as that of a resonant circuit having one inductor and one capacitor (hereinafter referred to as an "LC resonant circuit"), the capacitance can be reduced to half. That is, the LLC resonant circuit can be made thinner than the LC resonant circuit, but is more sensitive to the effects of capacitance.

[0614] at the same time, Figure 90 FIG. 1 shows an equivalent circuit in which two LC resonant circuits are connected in series (hereinafter referred to as “LCLC resonant circuit”), in which two resonant signals are combined and output. Figure 90 In FIG, two LC resonance circuits are shown to be connected in series, but the embodiment is not limited thereto, and three or more LC resonance circuits may be connected in series.

[0615] According to the LCLC resonant circuit, since the resonant frequencies of the two resonant circuits must be the same, the resonant frequency of each resonant circuit must be tuned to be the same during the manufacturing process.

[0616] As described above, although the number of windings increases when nickel is used as the ferrite core, Figure 89 and Figure 90 When two or more inductors are used as shown, a stylus pen with a small diameter can be manufactured by suppressing an increase in the diameter of the inductor portion.

[0617] Then, if Figure 77 As shown, the signal RS from the stylus pen 10 may be directly transmitted from the conductive tip 11 to the touch electrode layer 21 , or may be transmitted to the touch electrode layer 21 through the air or a non-conductive housing.

[0618] Even when the stylus pen 10 is hovering, the touch controller 262 can receive a sensing signal through the resonance signal RS transmitted to the touch electrode layer 21. When the touch controller 262 generates touch data based on the sensing signal, it may generate touch data that the user does not expect, or may generate incorrect or unstable touch data.

[0619] Will refer to Figure 91 Describes the touch input generated by transmitting the signal RS in the hover state.

[0620] Figure 91 Touch input generated by hovering the stylus is shown.

[0621] For example, when writing, the stylus pen 10 may move from an end point A of a previous stroke to a start point C of a next stroke on the touch screen 20 to write the previous stroke and then the next stroke.

[0622] The conductive tip 11 of the stylus 10 contacts the window 22 at one point (first point) A and also contacts the window 22 at another point (second point) C. Resonant signals RS0 and RS2 from the conductive tip 11 in contact with the window 22 can be transmitted to the touch electrode layer 21. Signal RS0 generates touch data corresponding to the first point A, and signal RS2 generates touch data corresponding to the second point C.

[0623] The stylus 10 is spaced apart from the window 22 in the area B between the first point A and the second point C. That is, the stylus 10 is hovering over the area B. Signal RS0 from the conductive tip 11 of the stylus 10 in the hovering state can be transmitted to the touch electrode layer 21. Signal RS1 generates touch data corresponding to the connecting stroke NL for the area B. That is, when the touch controller 262 generates touch data corresponding to the signal RS1 transmitted from the hovering stylus 10, touch data corresponding to the connecting stroke that is not intended by the user is generated and displayed on the touch screen 20.

[0624] Various embodiments provide a stylus that prevents signal transmission from a hovering stylus.

[0625] On the one hand, the user holds the stylus 10 and touches the touch screen 20 with the conductive tip 11. This will refer to Figures 92 to 94 Provide a description.

[0626] Figure 92 shows a schematic diagram showing a stylus and an electronic device when the stylus is held in hand, Figure 93 and Figure 94 Each shows a schematic circuit diagram showing a stylus and an electronic device when the stylus is held in hand.

[0627] exist Figure 92 In FIG, a user holds the stylus pen 10 and brings the tip of the stylus pen 10 into contact with the touch screen 20 to input a touch.

[0628] The stylus pen 10 may be held by a user's finger UF. In this case, the finger UF and the internal conductor of the stylus pen 10 (conductors connecting the coil 116 of the stylus pen 10 and various components, etc.) may form parasitic capacitances Cf1 and Cf2.

[0629] Figure 93 and Figure 94 Each shows an equivalent circuit showing the effect of parasitic capacitance Cf generated by the user's hand. Figure 93 and Figure 94The resonant frequency of the stylus pen 10 is changed by the parasitic capacitance Cf. Therefore, the frequency of the power supply 40 for transmitting the driving signal is inconsistent with the resonant frequency of the stylus pen 10, and thus the amplitude of the resonant signal of the stylus pen 10 is reduced.

[0630] Will refer to Figure 95 A stylus for preventing a change in resonant frequency due to a user's grip is described.

[0631] Figure 95 A schematic diagram of a stylus is shown.

[0632] and Figure 92 Compared with the Stylus 10, Figure 95 The illustrated stylus 10 ′ also includes a blocking member 17 .

[0633] The blocking member 17 is a conductive member that surrounds at least a portion of the housing 19 or is a conductive member that is at least a portion of the housing 19, and can prevent the user's hand from forming a parasitic capacitance. However, the blocking member 17 may generate eddy currents. This will be referred to Figure 96 Provide a description.

[0634] Figure 96 Shows the display Figure 95 An example diagram of eddy currents generated in a stylus is shown in FIG.

[0635] like Figure 96 As shown in (a) of FIG. 1 , a current I1 flows through the coil 116 due to resonance. The current I1 flowing through the coil 116 forms a magnetic field M1.

[0636] The magnetic field M1 generates a current I2 in a predetermined direction in the blocking member 17. The current I2 may be generated on a plane perpendicular to the direction of the magnetic field M1 generated by the inductor portion 140. Figure 96 As shown in (b), the current I2 is combined to generate a clockwise eddy current I3.

[0637] This eddy current I3 suppresses the magnetic field M1 generated in the coil 116. Then, the inductance of the inductor portion 114 changes, and a problem occurs in that the resonance frequency of the stylus pen 10 changes according to the change in inductance.

[0638] Various embodiments provide a stylus that further prevents changes in resonant frequency caused by a user's grip and eddy current generation.

[0639] Figures 97 to 105 Schematic diagrams showing the structure of a stylus according to various embodiments are shown.

[0640] Figure 97 A stylus is shown that prevents resonant signal transmission in a hovering stylus, Figure 98A stylus that further prevents resonant signal transmission in a hovering stylus and changes in resonant frequency due to eddy current generation is shown. Figure 99 and Figure 100 A stylus is shown that further prevents resonant signal transmission in a hovering stylus and changes in resonant frequency due to user grip and eddy current generation, Figures 101 to 105 A stylus is shown that further prevents changes in resonant frequency due to user grip and eddy current generation.

[0641] Figures 97 to 105 The stylus pen 10 may include a conductive tip 110, a resonant circuit portion, a blocking member 170, a ground portion 180, and a housing 190. For ease of description, although Figures 97 to 100 Only the inductor portion 140 of the resonant circuit portion is shown in FIG. 1 , but the resonant circuit portion may further include a capacitor portion, and the capacitor portion may be located inside the housing 190 .

[0642] By reference Figures 97 to 105 , all or a portion of the conductive tip 11 may be formed of a conductive material (e.g., metal), or the conductive tip 11 may have a form in which the conductive tip 11 exists inside the non-conductive shell while a portion thereof is exposed outside the non-conductive shell, but the present invention is not limited thereto.

[0643] The capacitor unit (not shown) and the inductor unit 140 are located in the housing 190. The capacitor unit (not shown) may include a plurality of capacitors connected in parallel. These capacitors may have different capacitances and may be adjusted during the manufacturing process. The inductor unit 140 may be positioned to be spaced apart from the conductive tip 110 by a first distance d1.

[0644] The housing 190 may house the elements of the stylus pen 10. Since the interior of the housing 190 is hollow, the housing 190 may house therein the conductive tip 110, the resonant circuit portion, and the ground portion 180. The housing 190 may be made of a non-conductive material.

[0645] The housing 190 includes a grip portion 190a adjacent to the conductive tip 110 and a main body portion 190b spaced apart from the conductive tip 110. The grip portion 190a and the main body portion 190b may be integrally formed. Although the grip portion 190a and the main body portion 190b are shown as being integrally coupled, the grip portion 190a and the main body portion 190b may be separable.

[0646] The handheld portion 190a may be Figure 97 (a) angular form or Figure 97 Alternatively, the handheld portion 190a may have a cylindrical shape, Figure 97The dome 192 of (c) is connected to the cylindrical shape. Alternatively, the handle 190a may be Figure 97 (d) Tubular form.

[0647] The body portion 190 b may have a cylindrical shape, a polygonal shape, a column shape having at least a portion of a curved shape, a convex shape, a truncated pyramid shape, a truncated cone shape, etc., but the present invention is not limited thereto.

[0648] The blocking member 170a can be positioned to correspond to a portion of the housing where the conductive tip 110 is exposed. For example, the blocking member 170a can be located within a range of 0 mm to 20 mm from the opening of the handheld portion 190a where the conductive tip 110 is exposed. Specifically, the blocking member 170a can be located between the opening of the handheld portion 190a and a portion 20 mm from the opening of the handheld portion 190a. Furthermore, the blocking member 170a can be located between a portion greater than or equal to 0.1 mm from the opening of the handheld portion 190a and a portion 10 mm from the opening of the handheld portion 190a, or between a portion at least 1 mm from the opening of the handheld portion 190a and a portion 5 mm from the opening of the handheld portion 190a. In other words, the blocking member 170a can be located in an area adjacent to the portion of the housing where the conductive tip 110 is exposed, at least 25 mm from the opening of the handheld portion 190a.

[0649] The blocking member 170a may be a conductive member surrounding at least a portion of the handheld portion 190a. The blocking member 170a may be a conductive member that is at least a portion of the handheld portion 190a. The blocking member 170a may be connected to the ground portion 180 via the conductive connecting member 112. The blocking member 170a is electrically connected to the ground portion 180 to be grounded.

[0650] The blocking member 170a may be located inside or outside the grip portion 190a. Figure 97 190a, but when the conductive tip 110 extends into the main body 190b, the blocking member 170a may also be disposed inside or outside the main body 190b.

[0651] In addition, depending on the position of the capacitor and inductor unit 140, the blocking member 170a may surround at least a portion of the capacitor and inductor unit 140. For example, when the capacitor and inductor unit 140 is located inside the grip portion 190a, the blocking member 170a may surround at least a portion of the capacitor and inductor unit 140.

[0652] like Figure 97As shown, when the inductor portion 140 is spaced apart from the blocking member 170a by a distance greater than or equal to a predetermined distance, the blocking member 170a may be in the form of a conductive plate. Furthermore, the blocking member 170a may also be a conductive coil inside the handheld portion 190a. For example, the blocking member 170a may be a conductive coil wound while in contact with the interior of the handheld portion 190a.

[0653] The blocking member 170a is spaced apart from the ferrite core of the inductor part 140 by a first distance d1 in the direction PD. Even when the blocking member 170a is not formed of a plurality of blocking units, the influence of the magnetic field generated by the ferrite core of the inductor part 140 is small.

[0654] exist Figure 97 In (a), the blocking member 170a may have a form that surrounds at least a portion of the side surface of the angular handle portion 190a. For example, the blocking member 170a may have a shape that surrounds only a portion of the side surface of the angular handle portion 190a adjacent to the tip 110.

[0655] exist Figure 97 In (b), the blocking member 170a may have a form that surrounds at least a portion of the side surface of the cylindrical handle portion 190a. For example, the blocking member 170a may have a shape that surrounds only a portion of the side surface of the cylindrical handle portion 190a adjacent to the tip 110.

[0656] exist Figure 97 In (c), the blocking member 170a may have a form that surrounds at least a portion of the side surface of the cylindrical grip portion 190a and the outer surface of the dome 192. For example, the blocking member 170a may have a shape that surrounds only the portion of the side surface of the cylindrical grip portion 190a and the outer surface of the dome 192 adjacent to the tip 110.

[0657] exist Figure 97 In (d), the blocking member 170a may have a form that surrounds at least a portion of the inner surface of the tubular handle portion 190a. For example, the blocking member 170a may have a shape that surrounds only a portion of the inner surface of the tubular handle portion 190a adjacent to the tip 110.

[0658] like Figure 98 As shown, when the inductor portion 140 is spaced apart from the blocking member 170a by a distance less than or equal to the second distance d2 (the second distance d2 is shorter than the first distance d1), the blocking member 170a may include a plurality of first blocking units 171a. For example, the blocking member 170a may include a plurality of blocking units 171a spaced apart from each other, and the blocking units 171a form a closed loop in the circumferential direction of the hand-held portion 190a.

[0659] The first blocking units 171a extend in a direction perpendicular to the eddy current direction PD, i.e., in a direction parallel to the axial direction PD of the ferrite core in the inductor portion 140, and are spaced apart from each other in the direction ED of the eddy current. The first blocking units 171a can be spaced apart from each other at intervals greater than or equal to 0.03 mm along the direction ED of the eddy current. Since the blocking member 170a includes the first blocking units 171a spaced apart from each other along the direction ED of the eddy current, no eddy current can flow along the blocking member 170a, thereby blocking the generation of eddy current. Although the first blocking unit 171a has been described as extending in a direction perpendicular to the eddy current direction PD, the first blocking unit 171a can extend in a direction inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD.

[0660] The first blocking units 171a are electrically connected to each other through the connecting portion 174a. In addition, the connecting portion 174a can be electrically connected to the ground portion 180. That is, the first blocking units 171a can be connected to the ground portion 180 through the conductive connecting member 112. The blocking member 170a is electrically connected to the ground portion 180 to be grounded.

[0661] exist Figure 98 In (a), the blocking member 170a may have a form that surrounds at least a portion of the side surface of the angular handle portion 190a. For example, the blocking member 170a may have a shape that surrounds only a portion of the side surface of the angular handle portion 190a adjacent to the tip 110.

[0662] exist Figure 98 In (b), the blocking member 170a may have a form that surrounds at least a portion of the side surface of the cylindrical handle portion 190a. For example, the blocking member 170a may have a shape that surrounds only a portion of the side surface of the cylindrical handle portion 190a adjacent to the tip 110.

[0663] exist Figure 98 In (c), the blocking member 170a may have a form that surrounds at least a portion of the side surface of the cylindrical grip portion 190a and the outer surface of the dome 192. For example, the blocking member 170a may have a shape that surrounds only the portion of the side surface of the cylindrical grip portion 190a and the outer surface of the dome 192 adjacent to the tip 110.

[0664] exist Figure 98 In (d), the blocking member 170a may have a form that surrounds at least a portion of the inner surface of the tubular handle portion 190a. For example, the blocking member 170a may have a shape that surrounds only a portion of the inner surface of the tubular handle portion 190a adjacent to the tip 110.

[0665] and Figure 97 The stylus 10 shown is compared to Figure 99 The illustrated stylus 10 also includes a blocking member 170b. Figure 26 The stylus 10 shown is compared to Figure 100 The illustrated stylus 10 also includes a blocking member 170b. The blocking member 170b includes a conductive member surrounding the inductor portion 140. The blocking member 170b may include a plurality of first blocking units 171b. For example, the blocking member 170b may include a plurality of blocking units 171b spaced apart from one another, with the blocking units 171b forming a closed loop in the circumferential direction of the main body portion 190b.

[0666] The blocking member 170b may be located inside or outside the body portion 190b to surround at least a portion of the inductor portion 140. Figure 99 190b, but when the inductor portion 140 extends into the handheld portion 190a, the blocking member 170b may be located inside or outside the handheld portion 190a.

[0667] The first blocking units 171b extend in a direction perpendicular to the eddy current direction PD, that is, in a direction parallel to the axial direction PD of the ferrite core in the inductor unit 140, and are spaced apart from each other in the eddy current direction ED. Since the blocking member 170b includes the first blocking units 171b spaced apart from each other in the eddy current direction ED, no eddy current can flow along the blocking member 170b, thereby blocking the generation of eddy current. Although the first blocking units 171b have been described as extending in a direction perpendicular to the eddy current direction PD, the first blocking units 171b may extend in a direction that is inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD.

[0668] Blocking members 170a and 170b may be electrically connected to each other. For example, blocking member 170a and first blocking unit 171b may be electrically connected at the boundary between handle portion 190a and main body portion 190b. Multiple first blocking units 171b may be electrically connected to each other via connecting portion 174b. Connecting portion 174b may be electrically connected to ground portion 180. In other words, first blocking unit 171b may be connected to ground portion 180 via conductive connecting member 112. Both blocking members 170a and 170b may be electrically connected to ground portion 180, which is to be grounded.

[0669] Reference Figure 101 (a), the stylus pen 10 includes a conductive tip 110 , a conductive connecting member 120 , a capacitor portion 130 , an inductor portion 140 , a blocking member 170 , a ground portion 180 , and a housing 190 .

[0670] The blocking member 170 includes a conductive member surrounding the capacitor part 130 and the inductor part 140. The blocking member 170 may be connected to the ground part 180.

[0671] Furthermore, opposite ends of the blocking member 170 are spaced apart along the direction ED of the eddy current. Figure 101 (b) to (e) show the blocking member 170 in detail.

[0672] Reference Figure 101 (b) The blocking member 170 includes a slit GP for blocking the generation of eddy currents. The slit GP extends perpendicular to the direction PD of the eddy currents. Opposite ends 1701 and 1702 of the blocking member 170 are separated by the slit GP. In various embodiments, the slit GP may have a width greater than or equal to 0.03 mm along the direction ED of the eddy currents.

[0673] Although the slit GP has been described as extending in the direction PD perpendicular to the eddy current, the slit GP may extend in a direction inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) with respect to the direction PD.

[0674] The opposite ends 1701 and 1702 of the blocking member 170 are spaced apart in the direction ED of the eddy current. Therefore, since the eddy current cannot flow along the blocking member 170, the generation of the eddy current is interrupted.

[0675] Reference Figure 101 (c) The blocking member 170 includes a plurality of first blocking portions 171. The plurality of first blocking portions 171 extend in a direction perpendicular to the eddy current PD and are spaced apart from each other in the direction ED of the eddy current. Similarly, since the blocking member 170 includes a plurality of first blocking portions 171 spaced apart from each other in the direction ED of the eddy current, no eddy current can flow along the blocking member 170, thereby blocking the generation of eddy current. Although the first blocking portion 171 has been described as extending in a direction perpendicular to the eddy current PD, the first blocking portion 171 may extend in a direction that is inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD.

[0676] Reference Figure 101 In (d), the blocking member 170 includes a plurality of second blocking portions 172. The plurality of second blocking portions 172 are spaced apart in a direction perpendicular to the eddy current PD, and the opposite ends of each second blocking portion 172 are spaced apart from each other in the eddy current direction ED. Similarly, since the opposite ends of each second blocking portion 172 included in the blocking member 170 are spaced apart in the eddy current direction ED, no eddy current can flow along the blocking member 170, thereby blocking the generation of eddy current.

[0677] Reference Figure 101(e) The blocking member 170 includes a plurality of third blocking portions 173. The third blocking portions 173 are spaced apart from each other along a direction perpendicular to the eddy current PD and the direction ED of the eddy current. Similarly, since the third blocking portions 173 included in the blocking member 170 are spaced apart along the direction ED of the eddy current, no eddy current can flow along the blocking member 170, thereby blocking the generation of the eddy current.

[0678] Housing 190 may include a combination of an angular portion and a cylindrical portion. While housing 190 is shown as an integral combination of the angular portion and the cylindrical portion, these two portions may be separate. The cylindrical portion may have a cylindrical shape, a polygonal shape, a cylindrical shape having at least a portion of a curved surface, a convex shape, a truncated pyramid shape, a truncated cone shape, etc., but the present invention is not limited thereto. Housing 190 may be made of a non-conductive material.

[0679] The blocking member 170 may be disposed on an inner surface, an outer surface, or an interior of the housing 190, which will be referred to hereinafter. Figures 109 to 111 Provide a description.

[0680] Next, refer to Figure 102 (a), stylus 10 and Figure 101 The stylus pen 10 of (a) has the following difference: the blocking member 170 is connected to the ground portion 180. In addition, the blocking member 170 and the ground portion 180 may be connected at a position spaced apart from the inductor portion 140.

[0681] In this regard, Figure 102 (b) to (d) illustrate in detail the blocking member 170 connected to the ground portion 180 .

[0682] Reference Figure 102 In (b), the blocking member 170 includes a slit GP for blocking the generation of eddy currents and a connecting portion 174 for connecting the opposing ends 1701 and 1702 of the blocking member 170. The slit GP extends perpendicular to the direction PD of the eddy currents. The opposing ends 1701 and 1702 of the blocking member 170 are separated by the slit GP. The opposing ends 1701 and 1702 of the blocking member 170 are separated along the direction ED of the eddy currents.

[0683] The connection portion 174 may connect opposite ends 1701 and 1702 of the blocking member 170 at a position spaced apart from the inductor portion 140 in a direction perpendicular to the eddy current. The blocking member 170 may be connected to the ground portion 180 at the position of the connection portion 174.

[0684] Reference Figure 102 (c), the blocking member 170 includes a plurality of first blocking portions 171 and a first connecting portion 175 connecting the plurality of first blocking portions 171 to each other.

[0685] The first barrier portions 171 extend in a direction perpendicular to the eddy current direction PD and are spaced apart from each other in the eddy current direction ED.

[0686] The first connection portion 175 may connect the plurality of first blocking portions 171 at positions spaced apart from the inductor portion 140 in a direction perpendicular to the eddy current PD. The blocking member 170 may be connected to the ground portion 180 at the position of the connection portion 175.

[0687] Reference Figure 102 (d), the blocking member 170 includes a plurality of second blocking portions 172 , a second connecting portion 176 connecting the plurality of second blocking portions 172 to each other, and an additional grounding portion 177 .

[0688] The plurality of second barrier portions 172 are spaced apart in a direction PD perpendicular to the eddy current, and opposite ends of each second barrier portion 172 are spaced apart from each other in the direction ED of the eddy current.

[0689] The second connection portion 176 may extend from the inductor portion 140 in a direction perpendicular to the eddy current PD and may connect the plurality of second barrier portions 172 and the additional ground portion 177 .

[0690] The additional ground portion 177 may be connected to the ground portion 180. In addition, the additional ground portion 177 and the ground portion 180 may be connected at a position spaced apart from the inductor portion 140.

[0691] Next, refer to Figure 103 (a), stylus 10 and Figure 102 Compared with the stylus pen 10 of (a), there is the following difference: the blocking member 170 includes a first blocking member 170 a arranged to correspond to the inductor part 140 and a second blocking member 170 b connected to the ground part 180 .

[0692] The first blocking member 170a may extend in a direction PD perpendicular to the eddy current beyond a length CL of the ferrite core 150 of the inductor part 140. The second blocking member 170b is connected to the first blocking member 170a.

[0693] In this regard, Figure 103 (b) to (d) illustrate in detail the blocking member 170 including the first blocking member 170a and the second blocking member 170b.

[0694] Reference Figure 103(b) The first blocking member 170a includes a slit GP for blocking the generation of eddy currents. The slit GP extends perpendicular to the direction PD of the eddy currents to the lower end of the second blocking member 170b. The length ES1 of the first blocking member 170a may be greater than or equal to the length CL of the ferrite core 150 of the inductor unit 140. The length of the slit GP also corresponds to the length ES1 of the first blocking member 170a.

[0695] The opposite ends 1701 and 1702 of the first blocking member 170a are separated by a slit GP. The opposite ends 1701 and 1702 of the first blocking member 170a are separated along the direction ED of the eddy current. Therefore, since the eddy current cannot flow along the first blocking member 170a, the generation of the eddy current is interrupted.

[0696] The second blocking member 170b is coupled to the upper end of the first blocking member 170a. The second blocking member 170b may be connected to the ground portion 180. The second blocking member 170b is spaced apart from the ferrite core 150 of the inductor portion 140 along the direction PD. Therefore, even when no slit is formed in the second blocking member 170b, the influence of the magnetic field generated by the ferrite core 150 is small.

[0697] Reference Figure 103 (c) The first blocking member 170a includes a plurality of first blocking portions 171. The plurality of first blocking portions 171 extend in a direction perpendicular to the eddy current direction PD and are spaced apart from each other in the eddy current direction ED. The length ES2 of the first blocking member 170a may be greater than or equal to the length CL of the ferrite core 150 of the inductor unit 140. The length of the first blocking portion 171 also corresponds to the length ES2 of the first blocking member 170a. Therefore, since the eddy current cannot flow along the first blocking member 170a, the generation of the eddy current is interrupted.

[0698] The second blocking member 170b is coupled to the upper end of the first blocking member 170a. The second blocking member 170b may be connected to the ground portion 180. The second blocking member 170b is spaced apart from the ferrite core 150 of the inductor portion 140 along the direction PD. Therefore, even when the second blocking member 170b is not formed to include a plurality of blocking portions, the influence of the magnetic field generated by the ferrite core 150 is small.

[0699] Reference Figure 103(d) The first blocking member 170a includes a plurality of second blocking portions 172 and a second connecting portion 176 connecting the plurality of second blocking portions 172 to each other. The plurality of second blocking portions 172 are spaced apart along a direction PD perpendicular to the eddy current, and the opposite ends of each second blocking portion 172 are spaced apart from each other along the direction ED of the eddy current. Therefore, since the eddy current cannot flow along the first blocking member 170a, the generation of the eddy current is interrupted. The length ES3 of the first blocking member 170a can be greater than or equal to the length CL of the ferrite core 150 of the inductor portion 140.

[0700] The second connection portion 176 extends from the inductor part 140 in a direction PD perpendicular to the eddy current to connect the first and second blocking members 170 a and 170 b .

[0701] The second blocking member 170b is coupled to the upper end of the first blocking member 170a. The second blocking member 170b may be connected to the ground portion 180. The second blocking member 170b is spaced apart from the ferrite core 150 of the inductor portion 140 along the direction PD. Therefore, even when the second blocking member 170b is not formed to include a plurality of blocking portions, the influence of the magnetic field generated by the ferrite core 150 is small.

[0702] Next, refer to Figure 104 (a), the stylus pen 10 includes a conductive tip 110, a conductive connection member 120, a capacitor portion 130, an inductor portion 140, a blocking member 170, a ground portion 180, and a housing 190. Figure 102 Descriptions of components that are the same as or similar to the components shown in (a) will be omitted.

[0703] The position of the inductor 140 in the housing 190 of the stylus pen 10 is different from the position of the inductor 140 in the housing 190 of the stylus pen 10. Figure 103 The position of the inductor portion 140 in the housing 190 of the stylus pen 10 is different. The inductor portion 140 is spaced apart from the conductive tip 110 in the housing 190 of the stylus pen 10 .

[0704] In this regard, Figure 104 (b) to (d) illustrate in detail the blocking member 170 including the first blocking member 170a and the second blocking member 170b.

[0705] Reference Figure 104 (b) The first blocking member 170a includes a slit GP for blocking the generation of eddy currents. The slit GP extends to the upper end of the second blocking member 170b in a direction opposite to the direction PD perpendicular to the eddy currents. The length ES1 of the first blocking member 170a may be greater than or equal to the length CL of the ferrite core 150 of the inductor unit 140. The length of the slit GP also corresponds to the length ES1 of the first blocking member 170a.

[0706] The opposite ends 1701 and 1702 of the first blocking member 170a are separated by a slit GP. The opposite ends 1701 and 1702 of the first blocking member 170a are separated along the direction ED of the eddy current. Therefore, since the eddy current cannot flow along the first blocking member 170a, the generation of the eddy current is interrupted.

[0707] The second blocking member 170b is coupled to the lower end of the first blocking member 170a. The second blocking member 170b is spaced apart from the ferrite core 150 of the inductor part 140 in a direction opposite to the direction PD. Therefore, even when no slit is formed in the second blocking member 170b, the influence of the magnetic field generated by the ferrite core 150 is small.

[0708] Reference Figure 104 (c) The first blocking member 170a includes a plurality of first blocking portions 171. The first blocking portions 171 extend in a direction perpendicular to the eddy current direction PD and are spaced apart from each other in the eddy current direction ED. The length ES1 of the first blocking member 170a may be greater than or equal to the length CL of the ferrite core 150 of the inductor unit 140. The length of the first blocking portion 171 also corresponds to the length ES1 of the first blocking member 170a. Therefore, since the eddy current cannot flow along the first blocking member 170a, the generation of the eddy current is interrupted.

[0709] The second blocking member 170b is coupled to the lower end of the first blocking member 170a. The second blocking member 170b is spaced apart from the ferrite core 150 of the inductor part 140 in a direction opposite to the direction PD. Therefore, even when the second blocking member 170b is not formed to include a plurality of blocking portions, the influence of the magnetic field generated by the ferrite core 150 is small.

[0710] Reference Figure 104 In (d), the first blocking member 170a includes a plurality of second blocking portions 172 and a second connecting portion 176 connecting the plurality of second blocking portions 172 to each other. The plurality of second blocking portions 172 are spaced apart in a direction perpendicular to the eddy current direction PD, and the opposite ends of each second blocking portion 172 are spaced apart from each other in the eddy current direction ED. Therefore, since the eddy current cannot flow along the first blocking portion 170a, the generation of the eddy current is interrupted.

[0711] The second connection portion 176 extends from the inductor part 140 in a direction PD perpendicular to the eddy current to connect the first and second blocking members 170 a and 170 b .

[0712] The second blocking member 170b is coupled to the lower end of the first blocking member 170a. The second blocking member 170b is spaced apart from the ferrite core 150 of the inductor part 140 in a direction opposite to the direction PD. Therefore, even when the second blocking member 170b is not formed to include a plurality of blocking portions, the influence of the magnetic field generated by the ferrite core 150 is small.

[0713] Next, refer to Figure 105 (a), the stylus pen 10 includes a conductive tip 110, a conductive connection member 120, a capacitor portion 130, an inductor portion 140, a blocking member 170, a ground portion 180, and a housing 190. Figure 102 Descriptions of components identical or similar to the components shown in (a) will be omitted.

[0714] The position of the capacitor portion 130 in the housing 190 of the stylus pen 10 is similar to Figure 101 (a) Figure 102 (a) and Figure 103 The position of the capacitor portion 130 of the stylus pen 10 of (a) is different. The capacitor portion 130 is spaced apart from the conductive tip 110 in the housing 190 of the stylus pen 10 .

[0715] Similarly, the inductor portion 140 is spaced apart from the conductive tip 110 in the housing 190 of the stylus 10 .

[0716] The conductive tip 110 and the conductive connecting member 120 are located at the front of the stylus pen 10 , and the capacitor part 130 and the inductor part 140 are located at the rear of the stylus pen 10 .

[0717] The stylus pen 10 further includes a blocking member 170 to minimize the influence of a user's hand on the conductive connection member 120 and to prevent eddy current from being generated by the inductor part 140 .

[0718] In this regard, Figure 105 (b) to (d) show the blocking member 170 in detail.

[0719] Reference Figure 105 (b), the blocking member 170 includes a slit GP for blocking the generation of eddy current. The slit GP extends in a direction opposite to the direction PD perpendicular to the eddy current. The length ES1 of the blocking member 170 may correspond to the length of the conductive connection member 120.

[0720] The opposing ends 1701 and 1702 of the blocking member 170 are separated by the slit GP. The opposing ends 1701 and 1702 of the blocking member 170 are separated along the eddy current direction ED. Therefore, since the eddy current cannot flow along the blocking member 170, the generation of the eddy current is interrupted.

[0721] Reference Figure 105 (c), the blocking member 170 includes a plurality of first blocking portions 171 and a first connecting portion 175 connecting the plurality of first blocking portions 171 to each other.

[0722] The first blocking portions 171 extend in a direction perpendicular to the eddy current PD and are spaced apart from each other in the eddy current direction ED. The length ES2 of the blocking member 170 may be greater than or equal to the length CL of the ferrite core 150 of the inductor 140. The length of the first blocking portion 171 also corresponds to the length ES2 of the blocking member 170. Therefore, since the eddy current cannot flow along the blocking member 170, the generation of the eddy current is interrupted.

[0723] The first connection portion 175 may connect the plurality of first blocking portions 171 to each other. The blocking member 170 may be electrically connected to the ground portion 180 at the location of the connection portion 175.

[0724] Reference Figure 105 In (d), the blocking member 170 includes a plurality of second blocking portions 172 and a second connecting portion 176 connecting the plurality of second blocking portions 172 to each other. The plurality of second blocking portions 172 are spaced apart in a direction perpendicular to the eddy current direction PD, and the opposite ends of each second blocking portion 172 are spaced apart from each other in the eddy current direction ED. Therefore, since the eddy current cannot flow along the blocking member 170, the generation of the eddy current is interrupted.

[0725] The second connection portion 176 extends from the inductor portion 140 in a direction PD perpendicular to the eddy current.

[0726] Figure 106 and Figure 107 Schematic diagrams showing the structure of a blocking member of a stylus pen according to various embodiments are illustrated.

[0727] like Figure 106 As shown, opposite ends of the blocking member 170a are spaced apart along the eddy current direction ED. The blocking member 170a may be printed on a sheet to be attached to the handheld portion 190a by electroplating, photolithography, sputtering, etc., or may be printed on the handheld portion 190a by methods such as electroplating, photolithography, thin film deposition, etc., but the present invention is not limited thereto.

[0728] Reference Figure 106In (a), the blocking member 170a includes a slit GP for blocking the generation of eddy currents and a connecting portion 174a for connecting the opposite ends 1701a and 1702a of the blocking member 170a. The slit GP extends perpendicular to the direction PD of the eddy currents. The opposite ends 1701a and 1702a of the blocking member 170a are separated from each other by the slit GP. The opposite ends 1701a and 1702a of the blocking member 170a are separated in the direction ED of the eddy currents. The connecting portion 174a can connect the opposite ends 1701a and 1702a of the blocking member 170a.

[0729] Reference Figure 106 (b) The blocking member 170a includes a plurality of first blocking units 171a and a connecting portion 174a connecting the plurality of first blocking units 171a to each other. The first blocking units 171a extend in a direction perpendicular to the eddy current PD and are spaced apart from each other in the eddy current direction ED. The connecting portion 174a can connect the plurality of first blocking units 171a.

[0730] Reference Figure 106 (c), the blocking member 170a includes a plurality of second blocking units 172a and connection portions 174a and 176a connecting the plurality of second blocking units 172a.

[0731] The plurality of second blocking units 172a are spaced apart in a direction perpendicular to the eddy current PD, and opposite ends of each second blocking unit 172a are spaced apart from each other in the eddy current direction ED. The connecting portion 176a extends in a direction perpendicular to the eddy current PD and can connect the plurality of second blocking units 172a.

[0732] like Figure 107 As shown, opposite ends of the blocking member 170b are spaced apart in the direction ED of the eddy current. The blocking member 170b may be printed on a sheet to be attached to the main body 190b by electroplating, photolithography, sputtering, etc., or may be printed on the main body 190b by methods such as electroplating, photolithography, thin film deposition, etc., but the present invention is not limited thereto.

[0733] Reference Figure 107 In (a), the blocking member 170b includes a slit GP for blocking the generation of eddy currents and a connecting portion 174b for connecting the opposing ends 1701b and 1702b of the blocking member 170b. The slit GP extends perpendicular to the direction PD of the eddy currents. The opposing ends 1701b and 1702b of the blocking member 170b are separated from each other by the slit GP. The opposing ends 1701b and 1702b of the blocking member 170b are separated in the direction ED of the eddy currents. The connecting portion 174b can connect the opposing ends 1701b and 1702b of the blocking member 170b.

[0734] Reference Figure 107 (b) The blocking member 170b includes a plurality of first blocking units 171b and a connecting portion 174b connecting the plurality of first blocking units 171b to each other. The first blocking units 171b extend in a direction perpendicular to the eddy current PD and are spaced apart from each other in the eddy current direction ED. The connecting portion 174b can connect the plurality of first blocking units 171b.

[0735] Reference Figure 107 (c), the blocking member 170b includes a plurality of second blocking units 172b and connection portions 174b and 176b connecting the plurality of second blocking units 172b.

[0736] The plurality of second blocking units 172b are spaced apart in a direction perpendicular to the eddy current PD, and opposite ends of each second blocking unit 172b are spaced apart from each other in the eddy current direction ED. The connecting portion 176b extends in a direction perpendicular to the eddy current PD and can connect the plurality of second blocking units 172b.

[0737] Figure 108 Touch input generated by hovering a stylus according to various embodiments is shown.

[0738] like Figure 91 As described above, when writing, the stylus pen 10 may move from the end point A of a previous stroke to the start point C of a next stroke on the touch screen 20 to write the previous stroke and then the next stroke.

[0739] The conductive tip 110 of the stylus 10 contacts the window 22 at one point (first point) A and also contacts the window 22 at another point (second point) C. Resonant signals RS3 and RS5 from the conductive tip 110 in contact with the window 22 can be transmitted to the touch electrode layer 21. Signal RS3 generates touch data corresponding to the first point A, and signal RS5 generates touch data corresponding to the second point C.

[0740] The stylus 10 is spaced apart from the window 22 in the region B between the first point A and the second point C. That is, the stylus 10 is hovering over the region B. In this hovering state, a very small signal RS4 from the conductive tip 110 of the stylus 10 according to an embodiment is transmitted to the touch electrode layer 21, or no signal RS4 is transmitted to the touch electrode layer 21 at all. The touch controller 262 does not generate touch data caused by the signal RS4. In other words, no touch data corresponding to the connected stroke NL in the region B is generated.

[0741] According to at least one embodiment, a stylus that prevents unintentional touch input caused by a hovering stylus may be provided.

[0742] According to at least one embodiment, a stylus pen that is robust against external factors such as a user's grip may be provided.

[0743] According to at least one embodiment, the inductance and capacitance values ​​of the stylus pen may remain unchanged, and thus the resonant frequency may remain unchanged, thereby improving the touch sensitivity of the touch sensor.

[0744] Next, we will refer to Figures 109 to 111 The positional relationship between the blocking member 170 and the housing 190 is described.

[0745] Figures 109 to 111 Schematic diagrams showing the structure of a main body portion of a stylus according to various embodiments are shown.

[0746] First, refer to Figure 109 In (a), the stylus pen 10 includes a blocking member 170 b including a plurality of first blocking units 171 b , and a main body 190 b .

[0747] Figure 109 (b) shows a cross section of the stylus pen 10 cut along a cutting plane A1-A2-A3-A4. According to one embodiment, the first blocking unit 171b may be disposed on the inner surface 1902 of the main body 190b.

[0748] Next, refer to Figure 110 In (a), the stylus pen 10 includes a blocking member 170 b including a plurality of first blocking units 171 b , and a main body 190 b .

[0749] Figure 110 (b) shows a cross section of the stylus pen 10 cut along a cutting plane B1-B2-B3-B4. According to one embodiment, the first blocking unit 171b may be disposed on the outer surface 1900 of the body portion 190b.

[0750] Finally, refer to Figure 111 In (a), the stylus pen 10 includes a blocking member 170 b including a plurality of first blocking units 171 b , and a main body 190 b .

[0751] Figure 111 (b) shows a cross section of the stylus pen 10 cut along a cutting plane C1-C2-C3-C4. According to one embodiment, the first blocking unit 171b may be disposed between the outer surface 1900 and the inner surface 1902 of the body portion 190b.

[0752] although Figures 109 to 111 Only the blocking member 170b is described, but the blocking member 170a may be disposed on the inner surface of the grip portion 190a, on the outer surface of the grip portion 190a, or embedded between the outer and inner surfaces thereof.

[0753] at the same time, Figure 89 The influence of parasitic capacitance Cf in the LLC circuit shown in FIG is greater than that in the LC resonant circuit or LCLC resonant circuit. This is because, when designed for the same resonant frequency, the capacitance of the LLC resonant circuit is 1 / 2 of the capacitance of the LC resonant circuit or LCLC resonant circuit. Therefore, as Figure 89 As shown, when an LLC resonant circuit is used, the above structure can be applied to minimize the effect of reducing the capacitance to 1 / 2.

[0754] Figure 112 A schematic diagram of a stylus showing the LLC structure is shown.

[0755] like Figure 112 As shown, the stylus 10 includes a conductive tip 11 , a capacitor portion 113 , two inductor portions 114 and 114 ′, a blocking member 17 , a ground portion 18 , and a housing 19 .

[0756] Inductor portion 114 includes ferrite core 115 and coil 116 wound around ferrite core 115, and inductor portion 114' includes ferrite core 115' and coil 116' wound around ferrite core 115'. In this case, two inductor portions 114 and 114' are connected in series.

[0757] The blocking member 17 is a conductive member surrounding the capacitor portion 113 and the inductor portions 114 and 114 ′, and can prevent the user's hand UF from generating parasitic capacitance.

[0758] In this case, the blocking member 117 may be designed such that opposite ends of the blocking member 117 are spaced apart in the direction ED of the eddy current to minimize the influence of the eddy current generated in the stylus pen 10 .

[0759] In this regard, reference will be made to Figure 113 (a) to (d) describe the blocking member 17 in detail.

[0760] Figure 113 Various examples of blocking members are shown.

[0761] like Figure 112 As shown, a clockwise current flows through coils 116 and 116' by a drive signal transmitted from conductive tip 11, and the current flowing through coils 116 and 116' generates a magnetic field. In this case, the change in the magnetic field generated by the coil current generates an eddy current in a counterclockwise direction opposite to the direction of the coil current, and thus the counterclockwise eddy current flows in blocking member 17.

[0762] Reference Figure 113(a), the blocking member 17 includes a slit GP for blocking the generation of eddy current. The slit GP is perpendicular to the eddy current (in Figure 113 The opposing ends 17a and 17b of the blocking member 17 are separated by a slit GP. In an embodiment, the slit GP may have a width greater than or equal to 0.03 mm along the direction ED of the eddy current.

[0763] Although the slit GP has been described as extending perpendicular to the direction PD of the eddy current, the slit GP may extend in a direction inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD. The opposing ends 17a and 17b of the blocking member 17 are spaced apart along the direction ED of the eddy current. Therefore, since the eddy current cannot flow along the blocking member 17, the generation of the eddy current is interrupted.

[0764] Reference Figure 113 (b) The blocking member 17 includes a plurality of first blocking portions 171. The plurality of first blocking portions 171 extend in a direction perpendicular to the eddy current PD and are spaced apart from each other in the direction ED of the eddy current. Similarly, since the blocking member 17 includes a plurality of first blocking portions 171 spaced apart from each other in the direction ED of the eddy current, no eddy current can flow along the blocking member 17, thereby blocking the generation of eddy current. Although the first blocking portion 171 has been described as extending in a direction perpendicular to the eddy current PD, the first blocking portion 171 may extend in a direction that is inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD.

[0765] Reference Figure 113 (c) The blocking member 17 includes a plurality of second blocking portions 172. The plurality of second blocking portions 172 are spaced apart in a direction perpendicular to the eddy current PD, and the opposite ends of each second blocking portion 172 are spaced apart from each other in the eddy current direction ED. Similarly, since the opposite ends of each second blocking portion 172 included in the blocking member 17 are spaced apart in the eddy current direction ED, no eddy current can flow along the blocking member 17, thereby blocking the generation of eddy current.

[0766] Reference Figure 113 In (d), the blocking member 17 includes a plurality of third blocking portions 173. The plurality of third blocking portions 173 are spaced apart from one another along a direction perpendicular to the eddy current PD and the direction ED of the eddy current. Similarly, since the third blocking portions 173 included in the blocking member 17 are spaced apart along the direction ED of the eddy current, no eddy current can flow along the blocking member 17, thereby blocking the generation of eddy current.

[0767] Furthermore, in addition to the blocking member 17, the LLC stylus may further include Figures 97 to 111 The blocking members 170, 170a and 170b are shown.

[0768] Figure 114 FIG2 schematically shows a driving sequence of a touch sensor according to an embodiment.

[0769] like Figure 114 As shown, the electronic device 2 can operate in a first mode IN1 and a second mode IN2.

[0770] The first mode IN1 is a mode in which a touch of a user's body part (fingers, palms, etc.) is mainly input. During the first mode IN1, a driving signal may be applied to the plurality of first touch electrodes 111 (FTX), and a sensing signal according to the driving signal may be received by the plurality of second touch electrodes 121 (FRX).

[0771] During the first mode IN1, a period STX for applying a drive signal to the loop coil 264 to resonate the resonant circuit 12 of the stylus 10 may be repeated at a predetermined cycle (e.g., 60 Hz, 120 Hz, etc.). In this case, the first touch electrodes 111 and the second touch electrodes 121 may receive a sensing signal (SRX). Furthermore, the first mode IN1 may be a mode in which only an input from a user's body part is received. In this case, the period STX for applying the drive signal to the loop coil 264 may not be required.

[0772] When the touch sensor 261 senses a signal output from the stylus 10 through the resonance of the resonant circuit 12 of the stylus 10, the electronic device 2 operates in the second mode IN2. Furthermore, the touch sensor 261 can also operate in the second mode IN2 by using an external controller. For example, the touch sensor 261 can operate in the second mode IN2 when an application program for receiving touch input from the stylus 10 is executed, or when another sensor is expected to receive touch input from the stylus 10.

[0773] The second mode IN2 is a mode for mainly receiving a touch of the stylus pen 10. During the second mode IN2, a driving signal is applied to the loop coil 264 (STX), and a signal output from the stylus pen 10 can be received through the first touch electrode 111 and the second touch electrode 121 (SRX). The touch sensor 261 can identify the touch signal output from the stylus pen 10 based on the waveform of the sensing signal. Figure 3 Each of the styluses 10a, 10b and 10c.

[0774] During the second mode IN2, the period (FTX / FRX) for receiving the touch input of the body part may be repeated at a predetermined cycle (e.g., 60 Hz, 120 Hz, etc.). In this case, a driving signal may be applied to the plurality of first touch electrodes 111 (FTX), and a sensing signal according to the driving signal may be received by the plurality of second touch electrodes 121 (FRX). Figure 3 When the stylus 10a or stylus 10b is identified, the drive signal may not be applied to the loop coil 264 during this period to reduce power consumption depending on the application of the drive signal. Figure 3 When the stylus 10c is used, a driving signal may be applied to the loop coil 264 during this period. Thus, the stylus 10c can be charged even during a period of receiving touch input from a body part. Furthermore, the second mode IN2 may be a mode for receiving input only from the stylus 10c. In this case, the period (FTX / FRX) for receiving touch input from a body part may not be necessary.

[0775] Figures 115 to 118 Driving timings of a touch sensor according to various embodiments are shown.

[0776] Figure 115 and Figure 116 Each shows a timing when the touch sensor 261 operates in a mutual capacitance method, Figure 25 and Figure 26 Each shows a timing when the touch sensor 261 operates in the self-capacitance method.

[0777] like Figure 115 As shown, the driving signal D_111 may be applied to the first touch electrode 111 during the period Ta, and a sensing signal according to the driving signal D_111 may be received from the second touch electrode 121. In this case, the driving signal D_121 is not applied to the second touch electrode 121.

[0778] Next, the driving signal D_264 may be applied to the loop coil 264 during the period Tb. Then, the signal resonating in the resonance circuit 12 is enhanced. A sensing signal of the stylus pen 10 may be received from the first touch electrode 111 and the second touch electrode 121.

[0779] like Figure 116 As shown, the driving signal D_111 may be applied to the first touch electrode 111 during the period Ta, and a sensing signal according to the driving signal D_111 may be received from the second touch electrode 121. In this case, the driving signal D_121 may not be applied to the second touch electrode 121, but the driving signal D_264 may be applied to the loop coil 264. The signal resonating in the resonant circuit 12 is enhanced.

[0780] Since the sampling frequency of the second touch electrode 12 corresponds to the driving signal D_111 , the touch sensor 261 may receive a touch of a body part during the period Ta.

[0781] During the period Tb, only the driving signal D_264 may be applied to the loop coil 264. A sensing signal of the stylus pen 10 may be received from the first touch electrode 111 and the second touch electrode 121.

[0782] like Figure 117 As shown, during the first period T1 to the second period T2, the driving signal D_111 may be applied to the first touch electrode 111 , the driving signal D_121 may be applied to the second touch electrode 121 , and the driving signal D_264 may be applied to the loop coil 264 .

[0783] In this case, the touch of the body part can be received by setting the sampling frequency of the first touch electrode 111 and the second touch electrode 121 to correspond to the frequency of the driving signal D_111, and the touch of the stylus pen 10 can be received by setting it to correspond to the frequency of the signal output from the stylus pen 10.

[0784] like Figure 118 As shown, during the period Ta, the driving signal D_111 may be applied to the first touch electrode 111 to receive a touch of a body part, and a sensing signal of the stylus 10 may be received from the second touch electrode 121. In this case, the driving signal D_121 may not be applied to the second touch electrode 121, but the driving signal D_264 may be applied to the loop coil 264. The signal resonating in the resonant circuit 12 is enhanced.

[0785] During the period Tb, the driving signal D_121 may be applied to the first touch electrode 121 to receive a touch of a body part, and a sensing signal of the stylus 10 may be received from the first touch electrode 111. In this case, the driving signal D_111 may not be applied to the first touch electrode 111, but the driving signal D_264 may be applied to the loop coil 264. The signal resonating in the resonant circuit 12 is maintained.

[0786] As described above, in the touch sensor according to the present invention, while loop coil 264 transmits an electromagnetic signal to styluses 10a, 10b, and 10c, touch electrodes 111 and 121 can receive a resonant signal from styluses 10a, 10b, and 10c. With EMR and ECR methods, since the resonant signal is received from the stylus after the electromagnetic signal transmission stops, there is a problem of attenuation of the resonant signal in the stylus. Since touch input is determined based on the attenuated resonant signal, touch input may be incorrectly recognized, resulting in reduced touch sensitivity.

[0787] In the touch sensor according to the present invention, the loop coil 264 performs signal transmission, and the touch electrodes 111 and 121 perform signal reception. That is, since the touch electrodes 111 and 121 receive the resonance signal while the loop coil 264 transmits the signal, the resonance signal resonating in the stylus 10a is not attenuated and is received by the touch electrodes 111 and 121. This improves the SNR of the signal and increases the reception sensitivity of the touch input. Next, when the touch input is recognized, Figure 3 When the stylus 10a or the stylus 10b is used, the waveform of the driving signal applied to the loop coil 264 may be changed to reduce power consumption depending on the application of the driving signal.

[0788] This will refer to Figures 119 to 124 Provide a description.

[0789] Figures 119 to 124 Waveform diagrams showing driving signals according to various aspects of an embodiment are shown.

[0790] Reference Figure 119 During an initial period for quickly bringing the drive signal of the stylus pen 10 to a predetermined level, the coil driver 263 outputs a drive signal of a predetermined frequency to the loop coil 264. This allows the resonant signal of the stylus pen 10 to quickly reach the predetermined level. Then, during an effective period, the coil driver 263 outputs a drive signal with the predetermined frequency modified (e.g., with a reduced duty cycle). This allows the resonant signal of the stylus pen 10 to be maintained at an effective level.

[0791] That is, during the effective period, a driving signal having a lower duty ratio (or duty cycle) than a driving signal having a predetermined frequency may be output to the loop coil 264. For example, when the duty ratio of the driving signal output during the initial period is 1, the duty ratio of the driving signal output during the effective period may be reduced to 1 / 3 due to an increase in idle time caused by pulse skipping.

[0792] Reference Figure 120During the initial period, coil driver 263 outputs a periodic drive signal as the drive signal for loop coil 264, raising the resonant signal of stylus 10 to a predetermined level. Then, during the subsequent active period, a drive signal is output to loop coil 264 with the next pulse omitted each time two pulses are output, compared to the drive signal output to loop coil 264 during the initial period, maintaining the resonant signal of stylus 10 at the active level. That is, during the active period, when two pulses are output, the drive signal may be output with the next pulse omitted. Therefore, the drive signal output during the active period has a first period t1 and a second period t2. During the first period t1, a pulse signal with the same duty cycle as the pulse output during the initial period is output. During the second period t2, a pulse signal with a lower duty cycle than during the first period t1 is output. The first and second periods t2 may repeat. For example, if the duty cycle during the first period t1 is 1, the duty cycle during the second period t2 may decrease to 1 / 3 due to the increased idle time caused by pulse skipping.

[0793] The energy transmitted from the loop coil 264 to the stylus pen 10 can be increased as the period of skipping pulse output during the effective period is reduced. Therefore, as the period of skipping pulse output during the effective period is reduced, the signal level of the pen resonance signal generated during the effective period is increased. Figure 119 and Figure 120 As an example, in Figure 120 In the driving signal of , one pulse is omitted every time two pulses are output, so Figure 119 Compared with a driving signal in which one pulse is omitted every time one pulse is output, the signal level of the corresponding pen resonance signal can be increased.

[0794] In addition, as the number of periods in which pulse output is skipped during the effective period increases, the energy consumed for outputting the driving signal can be reduced. Therefore, as the number of periods in which pulse output is skipped during the effective period increases, the energy consumed by the touch sensor 261 during the effective period can be reduced. By referring to Figure 119 and Figure 120 As an example, in Figure 119 In the driving signal of , a pulse is omitted every time a pulse is output, so Figure 120 Compared with a driving signal in which one pulse is omitted whenever two pulses are output, the energy consumed by the touch sensor 261 can be reduced.

[0795] on the other hand, Figure 119 and Figure 120 An example of the driving signal output from the coil driver 263 to the loop coil 264 is shown, and the period in which the pulse output is skipped during the effective period may be variously modified.

[0796] Reference Figure 121 , in the drive signal output to the annular coil 264 during the effective period, the length of the period in which the same pulse is continuously output can be modified in various ways. For example, one pulse can be omitted whenever three pulses are output, or one pulse can be omitted whenever four pulses are output. Furthermore, for example, one pulse can be omitted whenever five pulses are output, and one pulse can be omitted whenever six pulses are output. Furthermore, for example, one pulse can be omitted whenever seven pulses are output, or one pulse can be omitted whenever eight pulses are output, and one pulse can be omitted whenever nine pulses are output. Therefore, when one pulse is periodically omitted, the duty ratio during the pulse skipping period can have a value of 1 / (2N+1)=1 / 3.

[0797] Meanwhile, in the driving signal output to the loop coil 264 during the effective period, the number of pulses to be skipped continuously may be modified in various ways. Figure 121 , the case where only one pulse is periodically omitted during the effective period is shown as an example, but the number of pulses periodically omitted during the effective period may be changed to two or more. Figure 122 As an example, the drive signal may be output so that a plurality of consecutive pulses (two pulses, three pulses, four pulses, etc.) are periodically skipped during the effective period. For example, when two consecutive pulses are periodically skipped during the effective period, assuming that the duty cycle of the drive signal output during the initial period is 1, the duty cycle during the pulse skipping period of the effective period is 1 / (2N+1)=1 / 5. Furthermore, for example, when three consecutive pulses are periodically skipped during the effective period, assuming that the duty cycle of the drive signal output during the initial period is 1, the duty cycle during the pulse skipping period of the effective period is 1 / (2N+1)=1 / 7. Furthermore, for example, when four consecutive pulses are periodically skipped during the effective period, assuming that the duty cycle of the drive signal output during the initial period is 1, the duty cycle during the pulse skipping period of the effective period is 1 / (2N+1)=1 / 9.

[0798] In addition, Figures 119 to 121 In FIG, the case where a pulse is output after an idle time has elapsed after a pulse is skipped during an effective period is shown as an example, but the timing of outputting a new pulse after a pulse skip is also variable. Figure 123As an example, during the effective period, the pulse output can be immediately restored at the time point t3 at the end of the pulse skipping period (interval t3 to t4). Therefore, the phase of the pulse signal output after the pulse skipping can be opposite to the phase of the pulse signal output before the pulse skipping. In this case, assuming that the duty cycle of the drive signal output during the initial period is 1, the duty cycle during the pulse skipping period of the effective period is 1 / 2N=1 / 2.

[0799] As described above, the energy transmitted from loop coil 264 to stylus 10 can increase as the number of pulses skipped during the active period decreases. Therefore, as the number of pulses continuously output during the active period increases, the energy transmitted from loop coil 264 to stylus 10 can increase. Therefore, when using a drive signal that skips one pulse every three pulses, the energy transmitted from loop coil 264 to stylus 10 can increase, and the corresponding pen resonance signal level can also increase. Furthermore, as the number of pulses skipped during the active period increases, the energy consumed by outputting the drive signal decreases. Therefore, as the number of pulses continuously output during the active period decreases, energy consumption in touch sensor 261 can be reduced. Therefore, when using a drive signal that skips one pulse every three pulses, energy consumption in touch sensor 261 during the active period can be reduced, compared to when using a drive signal that skips one pulse every nine pulses.

[0800] At the same time, Figures 119 to 121 , the case where the signal levels of the pulses output during the initial period and the effective period are the same is shown as an example, but the signal levels of the pulses output during the initial period and the effective period may be different. For example, the touch sensor 261 may set the signal level of the pulses output during the initial period to be higher than the signal level of the pulses output during the effective period to shorten the time until the pen resonance signal of the stylus 10 reaches a predetermined level. Furthermore, for example, the touch sensor 261 may set the signal level of the pulses output during the effective period to be higher than the signal level of the pulses output during the initial period to increase the energy transmitted to the stylus 10 during the effective period.

[0801] Reference Figure 124 During the initial period, a first driving signal of a high level IH pulse repeated at a predetermined cycle is applied to the loop coil 264. During the initial period, the resonance signal of the stylus pen 10 may be quickly reached (ie, saturated) by the first driving signal.

[0802] During the active period, a driving signal having a plurality of periods with different disable level periods is applied to the loop coil 264 .

[0803] For example, when the duty ratio (ratio of the disable-level period to the enable-level period during one repetition period P) of the first drive signal output during the initial period is 1:1, the duty ratio of the drive signal output during the active period is a:2b+1, a:2b+2, a:2b+3, a:2b+4, a:(3b+1), a:2(b+3)+1, a:2(b+3), a:(2b+1), and so on. Where a and b are integers. The period corresponding to one cycle P of the drive signal output during the active period may include a period in which the enable-level period and the disable-level period repeat at least n times, and a period in which the disable-level period is maintained at least 2n times. The enable-level period corresponds to a period in which the drive signal has an enable level IH, and the disable-level period corresponds to a period in which the drive signal has an disable level IL. The duty ratio of the drive signal is merely an example and may include any ratio for allowing the resonant signal of the stylus 10, which has reached a predetermined level, to be maintained at the active level.

[0804] The resonance signal of the stylus 10 reaching a predetermined level by the first driving signal during the initial period can be maintained at an effective level by the driving signal during the effective period. Here, the effective level indicates a level of the resonance signal of the stylus 10 that the touch controller 262 can detect as a touch signal.

[0805] The drive signal during the effective period may be a signal in which at least one pulse is periodically omitted from the first drive signal during the initial period. As described above, the drive signal during the effective period is output in a form in which at least one pulse is periodically omitted compared to the first drive signal before the initial period, so the pulse rates of the first drive signal during the initial period and the drive signal during the effective period may be different from each other. That is, the pulse rate of the drive signal during the effective period may be lower than the pulse rate of the first drive signal during the initial period. Here, the pulse rate may be the number of pulses output per unit time (e.g., 1s).

[0806] As the number of skipped pulses in the drive signal decreases during the active period, the energy transmitted from the touch sensor 261 to the stylus 10 can be increased. Therefore, as the number of skipped pulses in the drive signal decreases during the active period, the signal level of the pen resonance signal generated during the active period increases. Furthermore, as the number of skipped pulses in the drive signal increases during the active period, the energy consumed to output the drive signal can be reduced. Therefore, as the number of skipped pulses in the drive signal increases during the active period, the energy consumed by the touch sensor 261 during the active period can be reduced.

[0807] According to the embodiment, it is possible to improve a signal-to-noise ratio (SNR) of a signal output from a stylus pen, thereby increasing reception sensitivity of a touch input and calculating a more accurate touch position.

[0808] According to the embodiment, there are advantages in that palm rejection can be performed, and there are advantages in that energy consumption of the touch sensor can be reduced by reducing energy consumption during a period in which a driving signal is output to the touch sensor for resonance of the stylus.

[0809] Next, we will refer to Figure 125 A driving method of an electronic device according to an embodiment is described.

[0810] Figure 125 A flowchart showing a method of driving an electronic device according to an embodiment is shown.

[0811] During the first period, the electronic device 2 is driven in the first mode ( S10 ). The first mode is a mode in which a driving signal for detecting a touch input of a touch object other than the stylus pen 10 is applied to the touch sensor 261 .

[0812] For example, in the first mode, the first driver / receiver 2620 outputs driving signals to the first touch electrodes 111 - 1 to 111 - m , and the second driver / receiver 2622 receives sensing signals depending on the touch from the second touch electrodes 121 - 1 to 121 - n .

[0813] The controller 2624 may determine whether the sensing signal is a valid touch signal based on whether the signal amplitude of the sensing signal acquired during the first period exceeds a first threshold, and may obtain touch coordinate information by using the valid touch signal.

[0814] For example, when the signal amplitude of the sensing signal acquired during the first period exceeds a first threshold, the controller 2624 calculates touch coordinates using the sensing signal. When the signal amplitude of the sensing signal acquired during the first period is less than or equal to the first threshold, the controller 2624 does not calculate touch coordinates based on the sensing signal having a signal amplitude less than or equal to the first threshold. Furthermore, when the signal amplitude of the sensing signal acquired during the first period exceeds the first threshold, the controller 2624 may calculate the touch area using the sensing signal. The sensing signal acquired during the first period includes at least one of a first sensing signal caused by a user's body part (fingers, palm, etc.) and a second sensing signal caused by the stylus 10. The first threshold may be set such that the first sensing signal is determined to be a valid touch signal, while the second sensing signal is filtered.

[0815] During the first sub-period of the second period, the electronic device 2 is driven in the second mode (S20). The second mode is a mode in which a drive signal for detecting a touch input of the stylus pen 10 is applied to the loop coil 264. For example, the coil driver 263 applies the drive signal to the loop coil 264 simultaneously.

[0816] It is assumed that the frequency of the driving signal applied to the touch sensor 261 during the first period is equal to or less than the frequency of the driving signal applied to the loop coil 264 during the first sub-period. In addition, the frequency of the driving signal applied to the loop coil 264 during the first sub-period may be an integer (greater than or equal to 2) times the frequency of the horizontal synchronization signal of the signal controller 220.

[0817] During the second sub-period of the second period, the electronic device 2 receives a resonant sensing signal based on the driving signal at least once ( S30 ).

[0818] For example, the resonant circuit 12 of the stylus pen 10 resonates with the driving signal, thereby generating a resonant signal, which is transmitted to the touch sensor 261 through the conductive tip 11 .

[0819] In one embodiment, the first driver / receiver 2620 receives the sensing signals transmitted from the first touch electrodes 111-1 to 111-m at least once, and the second driver / receiver 2622 also receives the sensing signals transmitted from the second touch electrodes 121-1 to 121-n at least once. In this case, the timing at which the first driver / receiver 2620 and the second driver / receiver 2622 receive the sensing signals may be the same. The first driver / receiver 2620 and the second driver / receiver 2622 may then process the received sensing signals and transmit them to the controller 2624.

[0820] Although it has been described above that during the second sub-period, the first driver / receiver 2620 receives the sensing signals transmitted from the first touch electrodes 111-1 to 111-m and the second driver / receiver 2622 also receives the sensing signals transmitted from the second touch electrodes 121-1 to 121-n, during the second sub-period of the second period, the first driver / receiver 2620 may also receive the sensing signals transmitted from at least one of the first touch electrodes 111-1 to 111-m and the second driver / receiver 2622 may also receive the sensing signals transmitted from the second touch electrodes 121-1 to 121-n. -1 to 121-n, or during the second sub-period of the second time period, only the first driver / receiver 2620 receives the sensing signal from at least one of the first touch electrodes 111-1 to 111-m, or during the second sub-period of the second time period, only the second driver / receiver 2622 can receive the sensing signal from at least one of the second touch electrodes 121-1 to 121-n, and the sensing signal receiving operations of the first driver / receiver 2620 and the second driver / receiver 2622 are not limited to the above operations.

[0821] In addition, during the second sub-period, the first driver / receiver 2620 receives a sensing signal from at least one of the first touch electrodes 111-1 to 111-m, or may receive a sensing signal from all of the first touch electrodes 111-1 to 111-m, and similarly, the second driver / receiver 2622 also receives a sensing signal from at least one of the second touch electrodes 121-1 to 121-n, or may receive a sensing signal from all of the second touch electrodes 121-1 to 121-n.

[0822] The controller 2624 generates touch information by using some of the sensing signals received at least once by the first driver / receiver 2620 and the second driver / receiver 2622 , the some sensing signals being received during a period determined in response to the horizontal sync signal.

[0823] In another embodiment, the first driver / receiver 2620 is synchronized with the horizontal synchronization signal to receive the sensing signals transmitted from the first touch electrodes 111-1 to 111-m, and the second driver / receiver 2622 is also synchronized with the horizontal synchronization signal to receive the sensing signals transmitted from the second touch electrodes 121-1 to 121-n. The first driver / receiver 2620 and the second driver / receiver 2622 can then process the received sensing signals and transmit them to the controller 2624.

[0824] The controller 2624 generates touch information by using the sensing signals received by the first and second drivers / receivers 2620 and 2622 in synchronization with the horizontal synchronization signal.

[0825] The controller 2624 may determine whether the sensing signal acquired during the second sub-period is a valid touch signal based on whether the signal amplitude of the sensing signal exceeds a second threshold, and may obtain touch coordinate information about a point where the touch of the stylus pen 10 occurs by using the valid touch signal.

[0826] For example, when the signal amplitude of the sensing signal acquired during the second sub-period exceeds the second threshold, the controller 2624 calculates the touch coordinates using the sensing signal. When the signal amplitude of the sensing signal acquired during the second sub-period is less than or equal to the second threshold, the controller 2624 does not calculate the touch coordinates based on the sensing signal whose signal amplitude is less than or equal to the second threshold. In addition, when the signal amplitude of the sensing signal acquired during the second sub-period exceeds the second threshold, the controller 2624 may calculate the touch area using the sensing signal.

[0827] In this case, the drive signal during the second sub-period of the second period can be a signal in which at least one pulse is periodically omitted, as described above. For example, coil driver 263 raises the resonant signal of stylus pen 10 to a predetermined level by outputting a periodic drive signal as the drive signal for loop coil 264 during the first sub-period. Then, during the second sub-period, a drive signal is output to loop coil 264 in a form in which the next pulse is omitted, compared to the drive signal output to loop coil 264 during the initial period, each time two pulses are output, and the resonant signal of stylus pen 10 is maintained at an effective level.

[0828] Next, we will refer to Figure 126 A driving signal applied during the first period and the second period, a resonance signal of the stylus pen 10 , and a sensing signal are described.

[0829] Figure 126 Shows the display according to Figure 125 1 is a timing diagram of an example of a horizontal synchronization signal Hsync and a driving signal according to a driving method.

[0830] One touch report frame period according to the touch report rate includes a first period T1 and a second period T2. The touch report rate indicates a speed or frequency (Hz) at which the touch sensor 261 outputs touch data obtained by driving the touch electrodes to the controller 270 for reporting.

[0831] During the first period T1, the first driver / receiver 2620 outputs a drive signal to at least one of the first touch electrodes 111-1 to 111-m and the second touch electrodes 121-1 to 121-n. When the first driver / receiver 2620 outputs a drive signal to the first touch electrodes 111-1 to 111-m, the second driver / receiver 2622 may receive a sensing signal from the second touch electrodes 121-1 to 121-n. The touch controller 262 may obtain touch coordinate information based on the signal amplitude of the sensing signal.

[0832] During a first sub-period T21 of the second period T2 , the coil driver 263 applies a driving signal to the loop coil 264 .

[0833] The frequency of the driving signal applied to the loop coil 264 during the first sub-period T21 corresponds to the resonant frequency of the stylus 10. For example, the frequency of the driving signal output to the loop coil 264 during the first sub-period T21 may be an integer (greater than or equal to 2) times the frequency of the horizontal synchronization signal. In contrast, during the first period T1, the frequency of the driving signal output to the first touch electrodes 111-1 to 111-m is different from the resonant frequency of the stylus 10.

[0834] The frequency setting of the driving signal is only an example and can be set to a value different from the above. Specifically, the touch controller 262 can obtain the frequency of the driving signal from the signal controller (e.g. Figure 24 2524 in the embodiment receives the horizontal synchronization signal Hsync, the scan drive control signal, the data drive control signal, etc. The touch controller 262 can then set the frequency of the drive signal provided to the loop coil 264 based on the horizontal synchronization signal Hsync, and can synchronize the drive signal with the horizontal synchronization signal Hsync. For example, the touch controller 262 can set the frequency of the drive signal to an integer (greater than or equal to 2) times the frequency of the horizontal synchronization signal Hsync. The resonant frequency of the stylus 10 can then be designed to be an integer (greater than or equal to 2) times the frequency of the horizontal synchronization signal Hsync. The touch controller 262 can synchronize the drive signal with the pulses of the horizontal synchronization signal Hsync.

[0835] During the second sub-period T22 of the second period T2, the first driver / receiver 2620 is synchronized with each pulse of the horizontal synchronization signal Hsync to receive the sensing signals from the first touch electrodes 111-1 to 111-m, and the second driver / receiver 2622 receives the sensing signals from the second touch electrodes 121-1 to 121-n. In addition, during the second sub-period T22, each of the first driver / receiver 2620 and the second driver / receiver 2622 can receive the sensing signal at least once.

[0836] During the second sub-period T22, the driving signal is no longer applied, and the resonance signal output by the resonance circuit 12 of the stylus pen 10 may be received by at least one of the first touch electrodes 111-1 to 111-m and the second touch electrodes 121-1 to 121-n.

[0837] The pulse cycle of the horizontal synchronization signal Hsync is one horizontal period (1H) required to write data to the pixels PX in a row. After each pulse of the horizontal synchronization signal Hsync is generated, the data signal can be written to the pixel PX during the data write period TA. The data write period refers to the period in which the data signal is applied to the data line and the scan signal is applied to the scan line to write the data signal to the pixel PX. Because the data line and the scan line generate parasitic capacitance with the touch electrode, the voltage applied to the data line and the scan line during the data write period TA causes noise in the sensing signal sent to the touch electrode.

[0838] In one embodiment, the touch controller 262 may generate touch information by using a sensing signal received during the quiet period TB excluding the data writing period TA. The data writing period TA and the quiet period TB may be set differently according to the display device and the driving method of the display device.

[0839] Specifically, at each of a plurality of sampling points during the second sub-period T22, the first driver / receiver 2620 receives sensing signals from the first touch electrodes 111-1 to 111-m, and the second driver / receiver 2622 receives sensing signals from the second touch electrodes 121-1 to 121-n.

[0840] The touch controller 262 generates a reception signal by using the sensing signal received at the sampling point during the noise-free period TB.

[0841] For example, when the touch controller 262 receives only the horizontal synchronization signal Hsync, the touch controller 262 may determine a period from a predetermined first time after the time point when the pulse of the horizontal synchronization signal Hsync is generated to a predetermined second time as the data writing period TA, where the predetermined second time exceeds the predetermined first time. Various settings may be made according to the driving method of the display unit 250, and the present invention is not limited thereto. Then, the touch controller 262 generates a reception signal by using the remaining sensing signals except the sensing signals sampled during the data writing period TA.

[0842] As another example, when the touch controller 262 receives a scan drive control signal, the touch controller 262 may determine, according to the scan drive control signal, a period in which the scan signal has an enabled level as a data write period TA. The touch controller 262 then generates a reception signal by using the remaining sensing signals except the sensing signal sampled during the data write period TA.

[0843] As another example, when the touch controller 262 receives the data drive control signal, the touch controller 262 may determine, according to the data drive control signal, a period in which the data signal has an enable level as the data write period TA. The touch controller 262 then generates a reception signal by using the remaining signals except the sensing signal sampled during the data write period TA.

[0844] In another embodiment, it may be preferable that the first driver / receiver 2620 and the second driver / receiver 2622 receive the sensing signal during a noise-free period TB excluding the data writing period TA.

[0845] Specifically, during the quiet period TB excluding the data writing period TA, the first driver / receiver 2620 receives sensing signals from the first touch electrodes 111-1 to 111-m. Similarly, the second driver / receiver 2622 may receive sensing signals from the second touch electrodes 121-1 to 121-n.

[0846] That is, during a period excluding a period in which the scan signal has an enabled level, the touch controller 262 may receive a sensing signal from the touch sensor 261 based on at least one of the horizontal synchronization signal Hsync and the scan drive control signal. When the touch controller 262 receives the scan drive control signal, the touch controller 262 may determine a period in which the scan signal has a disabled level based on the scan drive control signal. When the touch controller 262 receives only the horizontal synchronization signal Hsync, the touch controller 262 may determine a period from a predetermined third time after the time point when the pulse of the horizontal synchronization signal Hsync is generated to a predetermined fourth time after the time point when the pulse of the horizontal synchronization signal Hsync is generated as a period in which the scan signal has an enabled level, and the predetermined fourth time point may exceed the predetermined third time point. Various settings may be made depending on the driving method of the display unit 250, and the present invention is not limited thereto.

[0847] Furthermore, during a period excluding the period during which data signals are applied to the data lines of display panel 251, touch controller 262 may receive sensing signals from touch sensor 261 based on at least one of horizontal synchronization signal Hsync and a data drive control signal. When touch controller 262 receives the data drive control signal, it may determine the period during which the data signals are applied to the data lines based on the data drive control signal. When touch controller 262 receives only horizontal synchronization signal Hsync, it may determine the period from a predetermined fifth time after the generation of a pulse of horizontal synchronization signal Hsync to a predetermined sixth time as the period during which the data signals are applied to the data lines, with the predetermined fifth time exceeding the predetermined sixth time. Various settings may be made depending on the driving method of display unit 250, and the present invention is not limited thereto.

[0848] The second period T2 includes a plurality of first sub-periods T21 and a plurality of second sub-periods T22. For example, during the second period T2, the combination of the first sub-period T21 and the second sub-period T22 may be repeated eight times.

[0849] Although it has been described above that the second time period T2 exists after the first time period T1, the first time period T1 may also exist after the second time period T2, and the duration of the first time period T1 and the second time period T2 may be changed respectively during multiple touch report frames. The driving method of the electronic device 2 of this embodiment is not limited to this.

[0850] Next, we will refer to Figures 127 to 126 An aspect of a display unit is described.

[0851] Figure 127 Shown schematically shows Figure 2 A block diagram of one aspect of a display unit, Figure 128 Shown Figure 127 pixels of the display unit, and Figure 129 shows the display for driving Figure 127 FIG. 1 is a timing diagram of an example of a driving signal of a display unit.

[0852] like Figure 127 As shown, the display unit includes: a display panel 251 including a plurality of pixels PX, a data driver 2522 , a scan driver 2520 and a signal controller 2524 .

[0853] The display panel 251 includes a plurality of pixels PX arranged in a substantially matrix form. Although not particularly limited, a plurality of scan lines S1 to Si extend substantially parallel to each other in a direction opposite to the row direction in which the pixels are arranged, and a plurality of data lines D1 to Dj extend substantially parallel to each other in a substantially column direction.

[0854] Each pixel PX connected to the display panel 251 is connected to a corresponding one of the scan lines S1 to Si and a corresponding one of the data lines D1 to Dj. Figure 127 2 is directly shown on the display panel 251, but each pixel PX is connected to a power source connected to the display panel 251 to receive a first power voltage ELVDD and a second power voltage ELVSS.

[0855] Each pixel PX emits light having predetermined brightness by a driving current supplied to the organic light emitting diode according to a corresponding data signal transmitted through the data lines D1 to Dj.

[0856] The scan driver 2520 generates scan signals corresponding to the respective pixels and transmits the scan signals through the scan lines S1 to Si. That is, the scan driver 2520 transmits the scan signals to the respective pixels included in each pixel row through the corresponding scan lines.

[0857] The scan driver 2520 receives the scan drive control signal CONT2 from the signal controller 2524 to generate a plurality of scan signals, and then supplies the scan signals to the scan lines S1 to Si connected to each pixel row. In addition, the scan driver 2520 generates a common control signal and supplies the common control signal to the common control line connected to all pixels PX.

[0858] The data driver 2522 transmits data signals to the respective pixels through the data lines D1 to Dj.

[0859] The data driver 2522 receives the data driving control signal CONT1 from the signal controller 2524 and supplies data signals corresponding to the data lines D1 to Dj connected to the respective pixels included in each pixel row.

[0860] The signal controller 2524 converts an image signal transmitted from the outside into image data DATA, and transmits the image data DATA to the data driver 2522. The signal controller 2524 receives external control signals such as a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, and a clock signal, and generates a control signal for controlling driving of the scan driver 2520 and the data driver 2522 to transmit the control signal to each of the scan driver 2520 and the data driver 2522. That is, the signal controller 2524 generates and transmits a scan driving control signal CONT2 for controlling the scan driver 2520 and a data driving control signal CONT1 for controlling the data driver 2522.

[0861] like Figure 128As shown, the pixel PX_lk may include an organic light emitting diode OLED, a first transistor TR1, a second transistor TR2, and a storage capacitor Cst. The pixel PX_lk may be located in the 1st pixel row and the kth pixel column. For ease of description, it is assumed that each transistor is a PMOS transistor.

[0862] The first transistor TR1 may be a driving transistor. In one embodiment, the first transistor TR1 may include a gate connected to the first node N1, a source connected to the first power voltage ELVDD, and a drain connected to the anode of the organic light emitting diode OLED.

[0863] The driving current is a current corresponding to a voltage difference between the gate and source of the first transistor TR1, and the driving current varies in response to a voltage according to a data signal applied to the data line D1.

[0864] The second transistor TR2 can be turned on according to the level of the scan signal applied to the scan line Sk to connect the first node N1 and the data line D1. In one embodiment, the second transistor TR2 may include a gate connected to the scan line Sk, a source connected to the data line D1, and a drain connected to the first node N1. The second transistor TR2 transmits a data voltage according to the data signal D[1] transmitted through the lth data line D1 to the first node N1 in response to the corresponding scan signal S[k] transmitted through the kth scan line Sk.

[0865] The storage capacitor Cst is connected between the first power voltage ELVDD and the first node N1. In one embodiment, the storage capacitor Cst may include a first electrode connected to the first power voltage ELVDD and a second electrode connected to the first node N1.

[0866] The organic light emitting diode OLED may emit light by the driving current flowing from the first transistor TR1. In one embodiment, the organic light emitting diode OLED may include an anode connected to the drain of the first transistor TR1 and a cathode connected to the second power voltage ELVSS.

[0867] like Figure 129 As shown, the period of the pulse of the vertical synchronization signal Vsync may be one frame period (1 FRAME) of the display panel 251 according to the display frame rate.

[0868] During one frame period (1FRAME), the data driver 2522 may be synchronized with the horizontal synchronization signal Hsync to apply an enable-level data signal to the data lines D1 to Dj. For example, for each pulse of the horizontal synchronization signal Hsync, the data driver 2522 applies a data signal corresponding to a pixel connected to a scan line to which a scan signal having a low-level voltage L is applied to all the data lines D1 to Dj.

[0869] During one frame period (1FRAME), the scan driver 2520 may be synchronized with the horizontal synchronization signal Hsync to generally apply scan signals S[1], S[2], ..., S[k-1], and S[k]. For example, for each pulse of the horizontal synchronization signal Hsync, the scan driver 2520 applies a scan signal of a low-level voltage L to a corresponding scan line.

[0870] Within one horizontal period 1H, that is, one cycle of a pulse of the horizontal synchronization signal Hsync, there are a period dwp in which a data signal is applied to a data line and a period sp in which a scan signal is a low-level voltage L.

[0871] Regarding the period dwp and the period sp, as an example, a pixel connected to the scan line Sk and the data line D1 will be described.

[0872] At t00, one horizontal period 1H starts. At t01, the data signal DATA[k] is applied to the data line D1. At t10, the scan signal S[k] applied to the scan line Sk becomes a low-level voltage L.

[0873] The time t10 at which the scan signal S[k] changes to the low level voltage L is the same as or different from the time t01 at which the data signal DATA[k] starts to be applied to the data line D1. For example, considering the RC delay of the data line D1, the data signal DATA[k] may be applied to the data line D1 before the scan signal S[k] changes to the low level voltage L.

[0874] At t11, the scan signal S[k] changes to a high-level voltage H. At t12, application of the data signal DATA[k] to the data line D1 is stopped. At t22, one horizontal period 1H ends.

[0875] The time t11 at which the scan signal S[k] becomes a high-level voltage H and the time t12 at which the data signal DATA[k] is stopped from being applied to the data line D1 may be the same as or different from the time t12. For example, the application of the data signal DATA[k] to the data line D1 may be stopped after the scan signal S[k] becomes a high-level voltage H.

[0876] Figure 126The data writing period TA described in the embodiment includes a period dwp and a period sp. Specifically, the data writing period TA starts at the earlier of the time when the period dwp starts and the time when the period sp starts, and ends at the later of the time when the period dwp ends and the time when the period sp ends. For example, the data writing period TA may be a period from t01 to t12.

[0877] Will refer to Figure 27 and Figure 28 The operation of the touch sensor 261 coupled to the display panel 251 is described.

[0878] Figure 130 and Figure 131 Each shows an electronic device according to an embodiment of the present invention. Figure 125 The timing diagram of the driving method receiving the sensing signal, wherein Figure 126 The display unit receives the sensing signal in synchronization with the horizontal synchronization signal.

[0879] like Figure 130 As shown, during the first sub-period T21 , the frequency of the driving signal D_264 may be twice the frequency of the horizontal synchronization signal Hsync.

[0880] In response to the frequency of the driving signal D_264 applied during the first sub-period T21, during the second sub-period T22, the first driver / receiver 2620 and the second driver / receiver 2622 can sample the sensing signal. For example, the first driver / receiver 2620 and the second driver / receiver 2622 can sample the sensing signal at at least one sampling time s00, s01, s02, s03, s10, s11, s12, s13, ... according to a clock signal having a predetermined frequency. Figure 27 As shown, the frequency of the clock signal used to sample the sensing signal is four times the frequency of the driving signal D_264. The at least one sampling time s00, s01, s02, s03, s10, s11, s12, s13, ... of the present invention can be any timing that can be periodically set with respect to the frequency of the driving signal D_264.

[0881] When, after the driving signal is synchronized with the pulses of the horizontal synchronization signal Hsync, the period of the horizontal synchronization signal Hsync changes due to an interface delay between the signal controller 220 and the touch controller 262, etc., an inconsistency may occur between a sampling moment (for example, the frequency of the clock signal used to sample the sensing signal is four times the frequency of the driving signal D_264) and a horizontal period 1H according to the horizontal synchronization signal Hsync, where the sampling moment is periodically set according to the frequency of the driving signal D_264, and the period of the one horizontal period 1H changes.

[0882] For example, when the period of the horizontal synchronization signal Hsync changes after synchronization with the first pulse of the horizontal synchronization signal Hsync, the clock signal used to sample the sensing signal is synchronized with the first pulse, and thus the timing of the sampling time within one horizontal period of 1H changes. It is then difficult to distinguish whether the sensing signal sampled within one horizontal period of 1H is a sensing signal sampled within the periods dwp and sp or a sensing signal sampled within a period other than the periods dwp and sp.

[0883] Therefore, the driving signal D_264 can be synchronized by at least one of the pulses of the horizontal synchronization signal Hsync or the pulses of the vertical synchronization signal Vsync. That is, the timing of the driving signal can be refreshed every horizontal period of a predetermined period or every frame of a predetermined period.

[0884] For example, the drive signal D_264 may be synchronized with the pulses of the horizontal synchronization signal Hsync for a predetermined period. For example, the pulse of the drive signal D_264 may start synchronously with the first pulse of the horizontal synchronization signal Hsync, and then the pulse of the drive signal D_264 may start synchronously with the i-th pulse of the horizontal synchronization signal. Therefore, even when the cycle of the horizontal synchronization signal Hsync changes, the sampling time period periodically set according to the frequency of the drive signal D_264 can be a desired time within a horizontal period of 1H.

[0885] As another example, the driving signal D_264 may be synchronized with a pulse of the vertical synchronization signal Vsync of each frame of a predetermined period. Figure 129 As shown, the pulse of the vertical synchronization signal Vsync can be changed to the enable level H at the same timing as the pulse of the horizontal synchronization signal Hsync in one horizontal period 1H. Therefore, by synchronizing the pulse of the vertical synchronization signal Vsync with the drive signal D_264 in each frame, the shift between the horizontal synchronization signal Hsync and the sampling time in the corresponding frame can be prevented. For example, the pulse of the drive signal D_264 can start synchronously with the pulse of the vertical synchronization signal Vsync in the first frame, and then the pulse of the drive signal D_264 can start synchronously with the pulse of the vertical synchronization signal Vsync in the second frame. Therefore, even when the cycle of the horizontal synchronization signal Hsync changes, the sampling time periodically set according to the frequency of the drive signal D_264 can be the expected time within one horizontal period 1H in one frame synchronized with the vertical synchronization signal Vsync.

[0886] Furthermore, in the present invention, at least one sampling instant s00, s01, s02, s03, s10, s11, s12, s13, ... may include at least two viewing angles whose phases are opposite to each other within one cycle of the frequency of the drive signal D_264. The present invention is not limited to the above description.

[0887] Furthermore, in the present invention, at least one sampling instant s00, s01, s02, s03, s10, s11, s12, s13, ... may include at least two viewing angles, the phases of which change within one cycle of the frequency of the drive signal D_264. The present invention is not limited to the above description.

[0888] The touch controller 262 generates touch information by using the sensing signals sampled during the periods other than the periods dwp and sp within one horizontal period 1H. That is, the touch controller 262 can generate touch information indicating touch coordinates, touch intensity, etc. by using the sensing signals sampled by the first driver / receiver 2620 and the second driver / receiver 2622 at at least one sampling time s10, s11, s12, s13, ...

[0889] In this case, the touch controller 262 can obtain the signal amplitude (i.e., the amplitude) of the sensing signal by using the difference between the signal value sampled at the first sampling time s10 and the signal value sampled at the third sampling time s12. In addition, the touch controller 262 can obtain the signal level of the sensing signal by using the difference between the signal value received at the second sampling time s11 and the signal value received at the fourth sampling time s13. The touch controller 262 can determine whether a touch has occurred, the touch coordinates, etc. based on the signal amplitude of the sensing signal.

[0890] Alternatively, the touch controller 262 may control the first driver / receiver 2620 and the second driver / receiver 2622 to sample the sensing signal during periods other than the periods dwp and sp within one horizontal period 1H.

[0891] like Figure 131 As shown, during the first sub-period T21 , the frequency of the driving signal D_264 may be three times the frequency of the horizontal synchronization signal Hsync.

[0892] According to one embodiment, the touch controller 262 selects some of the sensing signals sampled at least once during the second sub-period T22 based on the horizontal synchronization signal, and generates touch information by using the selected sensing signals. That is, the touch controller 262 uses the sensing signals sampled during the period other than the period dwp and the period sp within one horizontal period 1H within the second sub-period T22 as touch information.

[0893] Within one horizontal period 1H, the sensing signals sampled during periods other than the period dwp (during which the touch controller 262 applies the data signal to the data line) and the period sp (during which the scan signal is a low-level voltage L) are used as touch information, whereas the sensing signals generating noise according to the signals applied to the data line and the scan line which may generate parasitic capacitance with the touch electrode are not used as touch information, thereby having the effect of improving the SNR.

[0894] According to one embodiment, during a period other than the period dwp and the period sp within one horizontal period 1H within the second sub-period T22, the first driver / receiver 2620 receives sensing signals from the first touch electrodes 111-1 to 111-m, and the second driver / receiver 2622 receives sensing signals from the second touch electrodes 121-1 to 121-n.

[0895] By sampling the sensing signal during a period other than the period dwp (during which the data signal is applied to the data line) and the period sp (during which the scan signal is the enable level voltage L) within a horizontal period 1H by the first driver / receiver 2620 and the second driver / receiver 2622, the effect of preventing noise in the sensing signal based on the signal applied to the data line and the scan line that can generate parasitic capacitance with the touch electrode is achieved.

[0896] Next, we will refer to Figure 132 and Figure 133 Another aspect of the display unit will be described with reference to Figure 134 Description Join to Figure 132 The display unit and the touch sensor unit of the display panel are operated.

[0897] Figure 132 Shown schematically shows Figure 2 A block diagram of another aspect of the display unit, Figure 133 Shown Figure 132 pixels of the display unit, and Figure 134 An electronic device according to an embodiment of the present invention is shown. Figure 125 The timing diagram of the driving method receiving the sensing signal, wherein Figure 132 The display unit receives the sensing signal in synchronization with the horizontal synchronization signal.

[0898] like Figure 132 As shown, the display unit includes a display panel 251 including a plurality of pixels PX, a data driver 2522 , a scan driver 2520 , an emission control driver 2526 , and a signal controller 2524 .

[0899] The display panel 251 includes a plurality of pixels PX arranged in a substantially matrix form. Although not particularly limited, a plurality of scan lines S0 to S1 and a plurality of emission control lines E1 to Ei extend substantially parallel to each other in a direction opposite to the row direction in which the pixels are arranged, and a plurality of data lines D1 to Dj extend substantially parallel to each other in a substantially column direction.

[0900] Each pixel PX is connected to two corresponding scan lines among the scan lines S0 to Si connected to the display panel 251, one corresponding emission control line among the emission control lines E1 to Ei, and one corresponding data line among the data lines D1 to Dj. Figure 132 Although not directly shown on the display panel 251, each pixel PX is connected to a power source connected to the display panel 251 to receive a first power voltage ELVDD, a second power voltage ELVSS, and an initialization voltage VINT.

[0901] Each pixel PX of the display panel 251 is connected to two corresponding scan lines. That is, each pixel is connected to the scan line corresponding to the pixel row including the corresponding pixel and the scan line corresponding to the previous pixel row of the pixel row. Each pixel included in the first pixel row can be connected to the first scan line S1 and the virtual scan line S0. In addition, each pixel included in the i-th pixel row is connected to the i-th scan line Si corresponding to the i-th pixel row (which is the corresponding pixel row) and the (i-1)th scan line Si-1 corresponding to the (i-1)th pixel row (which is the previous pixel row).

[0902] Each pixel PX emits light having predetermined brightness by a driving current supplied to the organic light emitting diode according to a corresponding data signal transmitted through the data lines D1 to Dj.

[0903] The scan driver 2520 generates a scan signal corresponding to each pixel PX and transmits the scan signal through the scan lines S0 to Si. That is, the scan driver 2520 transmits the scan signal to each pixel PX included in each pixel row through the corresponding scan line.

[0904] The scan driver 2520 receives the scan driving control signal CONT2 from the signal controller 2524 to generate a plurality of scan signals, and then supplies the scan signals to the scan lines S0 to Si connected to each pixel row.

[0905] The data driver 2522 transmits a data signal to each pixel through the data lines D1 to Dj.

[0906] The data driver 2522 receives the data driving control signal CONT1 from the signal controller 2524 and supplies a data signal corresponding to the data lines D1 to Dj connected to each pixel included in each pixel row.

[0907] The emission control driver 2526 is connected to emission control lines E1 to Ei connected to the display panel 251 including pixels PX arranged in a matrix. That is, the emission control lines E1 to Ei extending substantially parallel to each other in a direction opposite to the substantially row direction of each pixel connect the pixels PX to the emission control driver 2526.

[0908] The emission control driver 2526 generates an emission control signal corresponding to each pixel and transmits the emission control signal through the emission control lines E1 to Ei. Each pixel that receives the emission control signal is controlled to emit an image according to the image data signal in response to the control of the emission control signal. That is, the emission control transistor ( Figure 133 Therefore, the organic light emitting diode connected to the light emission control transistor may or may not emit light with brightness according to the driving current corresponding to the data signal.

[0909] A first power voltage ELVDD, a second power voltage ELVSS, and an initialization voltage VINT are supplied to each pixel PX of the display panel 251. The first power voltage ELVDD may be a predetermined high-level voltage, and the second power voltage ELVSS may be a voltage lower than the first power voltage ELVDD or a ground voltage. The initialization voltage VINT may be...

Claims

1. An electronic device comprising: Toroidal coil; a display unit configured to include a plurality of pixels; a display driver configured to apply a data signal and a scan signal to the pixels according to a vertical synchronization signal and a horizontal synchronization signal; a plurality of touch electrodes, wherein the plurality of touch electrodes are located on the display unit; a driving receiver configured to apply a driving signal to the loop coil during a first period, and receive a sensing signal from at least one of the touch electrodes during a second period after the first period in response to the driving signal applied to the loop coil; as well as a controller configured to generate touch information by using the sensing signal, The driving signal is synchronized with at least one pulse of the vertical synchronization signal and the horizontal synchronization signal.

2. The electronic device according to claim 1, wherein The driving receiver is synchronized with a pulse of the horizontal synchronization signal to receive the sensing signal.

3. The electronic device according to claim 2, wherein: The controller generates the touch information by using some of the sensing signals received during a sensing period determined in response to the horizontal synchronization signal.

4. The electronic device according to claim 3, wherein: The controller determines the following period as the sensing period: the period from the time when the pulse of the horizontal synchronization signal is generated to a predetermined second time excluding the period from the time when the pulse of the horizontal synchronization signal is generated to a predetermined first time, and the predetermined second time exceeds the predetermined first time.

5. The electronic device according to claim 2, wherein: The controller determines a period excluding a period in which a scan signal applied to one of the pixels is at an enable level as a sensing period.

6. The electronic device according to claim 2, wherein: The controller determines a period excluding a period in which a data signal is applied to one of the pixels as a sensing period.

7. The electronic device according to claim 1, wherein The driving receiver receives the sensing signal at two time points with opposite phases within one frequency cycle of the driving signal.

8. The electronic device according to claim 7, wherein: The controller generates the touch information by using a difference between the sensing signals received at the two moments.

9. The electronic device according to claim 7, wherein: The display driver also applies an emission control signal for controlling the pixels to emit light, and The two timings are within a period excluding a timing at which an emission control signal applied to one of the pixels transitions to an enable level.

10. The electronic device according to claim 1, wherein The frequency of the driving signal is an integer multiple of the frequency of the horizontal synchronization signal, and the integer is greater than or equal to 2.

11. A touch device on a display, the display displaying an image of one frame by applying a scan signal and a data signal to a plurality of pixels according to a vertical synchronization signal and a horizontal synchronization signal, the touch device comprising: Toroidal coil; a touch sensor unit configured to include a plurality of electrodes; a driving receiver configured to apply a driving signal to the loop coil during a first period, and in response to the driving signal applied to the loop coil, receive a sensing signal from at least one of the electrodes during a second period following the first period, the sensing signal having a predetermined phase difference from the driving signal; as well as a controller configured to generate touch information by using the sensing signal, The driving signal is synchronized with at least one pulse of the vertical synchronization signal and the horizontal synchronization signal.

12. The touch device according to claim 11, wherein: The driving receiver is synchronized with a pulse of the horizontal synchronization signal to receive the sensing signal.

13. The touch device according to claim 12, wherein: The controller generates the touch information by using some of the sensing signals received during a sensing period determined in response to the horizontal synchronization signal.

14. The touch device according to claim 13, wherein: The controller determines the following period as the sensing period: the period from the time when the pulse of the horizontal synchronization signal is generated to a predetermined second time excluding the period from the time when the pulse of the horizontal synchronization signal is generated to a predetermined first time, and the predetermined second time exceeds the predetermined first time.

15. The touch device according to claim 12, wherein: The controller determines a period excluding a period in which a scan signal applied to one of the pixels is at an enable level as a sensing period.

16. The touch device according to claim 12, wherein: The controller determines a period excluding a period in which a data signal is applied to one of the pixels as a sensing period.

17. The touch device according to claim 11, wherein: The driving receiver receives the sensing signal at two time points with opposite phases within one frequency cycle of the driving signal.

18. The touch device according to claim 17, wherein: The controller generates the touch information by using a difference between the sensing signals received at the two moments.

19. The touch device according to claim 11, wherein: The frequency of the driving signal is an integer multiple of the frequency of the horizontal synchronization signal, and the integer is greater than or equal to 2.

20. A touch system comprising: a stylus pen configured to include a resonant circuit; a display configured to include a display unit and a display driver, the display unit configured to include a plurality of pixels, the display driver configured to apply a data signal and a scan signal to the pixels according to a vertical synchronization signal and a horizontal synchronization signal; a plurality of touch electrodes, wherein the plurality of touch electrodes are located on the display unit; a driving receiver configured to apply a driving signal to the loop coil during a first period, and receive a sensing signal from at least one of the touch electrodes during a second period following the first period in response to the driving signal applied to the loop coil; and a controller configured to generate touch information by using the sensing signal, The driving signal is synchronized with at least one pulse of the vertical synchronization signal and the horizontal synchronization signal.

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