Touch device, electronic device and touch system

Abstract

The invention relates to a touch device, an electronic device and a touch system. The touch device includes: a conductive ring; and a touch module configured to apply a first driving signal to one end of the conductive ring, where the other end of the conductive ring is grounded.

Description

[0001] This application is a divisional application of the invention patent application filed on January 21, 2021, with application number "202180009683.5" and invention title "Stylus Pen, Antenna Module, Touch Sensor and Electronic Device". Technical Field

[0002] This invention relates to styluses, antenna modules, touch sensors, and electronic devices. Background Technology

[0003] Touch sensors are found in a variety of electronic devices, such as mobile phones, smartphones, laptops, digital broadcasting terminals, personal digital assistants, portable multimedia players, navigation devices, tablet PCs (slate PCs or tablet PCs), ultrabooks, wearable devices, and head-mounted displays.

[0004] In such electronic devices, touch sensors can be located on the display panel that shows images, or they can be integrated into a part of the electronic device. When a user interacts with the electronic device by touching the touch sensor, the electronic device can provide the user with an intuitive user interface.

[0005] Users can use a stylus to perform complex touch input. Depending on whether it contains a battery and electronic components, styluses can be classified as active styluses and passive styluses.

[0006] Active styluses offer superior basic performance compared to passive styluses, with the advantage of providing additional features (pen pressure, hover, and buttons), but the disadvantage is that they are difficult to use while charging the battery.

[0007] Compared to active styluses, passive styluses are cheaper and do not require batteries, but they are less capable of touch recognition compared to active styluses.

[0008] Specifically, in the case of an electromagnetic resonant (EMR) type passive stylus, the digitizer transmits an electromagnetic signal to the pen, and then the digitizer receives the resonant signal from the pen. That is, since signal transmission and reception are performed solely through the digitizer, simultaneous signal transmission and reception are not possible, thus requiring a time-division multiplexing approach for both. Similarly, in the case of an electrically coupled resonant (ECR) type passive stylus, the touch electrode sends an electromagnetic signal to the pen, and then the touch electrode receives the resonant signal from the pen. Again, since signal transmission and reception are performed solely through the touch electrode, simultaneous signal transmission and reception are not possible, thus requiring a time-division multiplexing approach for both.

[0009] Furthermore, noise exists in electronic devices for various reasons, and this noise can contribute to reduced sensing performance. In particular, in the case of styluses, the presence of noise in a frequency band similar to the stylus's resonant frequency can significantly reduce the accuracy of touch sensing.

[0010] In addition, touch sensors are susceptible to noise whose frequency is similar to the resonant frequency of the resonant circuit designed for use in a stylus. Summary of the Invention

[0011] Technical issues

[0012] Embodiments are made in an attempt to provide an antenna module for reducing noise in touch signals and an electronic device including the antenna module.

[0013] Implementations are made in an attempt to provide an antenna module that can be implemented on a single layer and an electronic device including the antenna module.

[0014] Embodiments are made in an attempt to provide an antenna module capable of improving the touch sensing performance of a stylus and an electronic device including the antenna module.

[0015] Implementations are proposed to provide a foldable electronic device that is easy to use with a stylus and a method for driving it.

[0016] The embodiments described herein attempt to provide a foldable electronic device and a driving method thereof that can improve the touch sensing performance of a stylus.

[0017] Embodiments are made in an attempt to provide an antenna module driven by a small current and an electronic device including the antenna module.

[0018] Implementations are made in an attempt to provide an antenna module capable of reducing power consumption and an electronic device including the antenna module.

[0019] Embodiments are made in an attempt to provide an antenna module capable of wireless charging without a separate wireless charging module, and an electronic device including the antenna module.

[0020] The embodiments are described in an attempt to provide an electronic device and a control method thereof that amplifies the magnetic field generated in a coil using the same voltage.

[0021] Implementations are made in an attempt to provide an electronic device and a control method thereof for preventing noise caused by a display panel.

[0022] The embodiments are described in an attempt to provide an electronic device and a touch detection method thereof, which can improve the touch sensing performance of a stylus in the presence of noise in the frequency band of a resonant signal similar to that of a stylus.

[0023] The embodiments described are intended to provide a stylus capable of generating a sufficient resonant signal.

[0024] Implementations are made in an attempt to provide a stylus that transmits signals with appropriate amplitude to a touch sensor.

[0025] The implementation method is designed to provide a stylus that can maintain the resonant frequency.

[0026] Embodiments are made in an attempt to provide a stylus having multiple resonant frequencies, and a touch sensor and electronic device for receiving signals with reduced noise by using the stylus.

[0027] Implementations are made in an attempt to provide a stylus, electronic device, and input system capable of wireless charging during stylus use.

[0028] Implementations are made in an attempt to provide a stylus, electronic device, and input system that can be wirelessly charged without a separate wireless charging module.

[0029] Implementations are made in an attempt to provide a stylus, electronic device, and input system capable of touch input and sensor input.

[0030] Implementations are proposed to provide a stylus, electronic device, and input system capable of changing the resonant frequency.

[0031] Implementations are made in an attempt to provide a stylus, electronic device, and input system capable of communicating using commercial communication protocols.

[0032] The embodiments described are intended to provide a stylus that can be wirelessly charged with maximum efficiency.

[0033] Technical solution

[0034] One embodiment of the present invention provides a display device comprising: a plurality of antenna rings spaced apart from each other formed on a substrate, wherein each antenna ring includes a first antenna ring connecting a first pad and a second pad on the substrate and a second antenna ring connecting a third pad and a fourth pad; and a flexible circuit board electrically connected to the first pad to the fourth pad, wherein the flexible circuit board includes connecting wires connecting the second pad and the third pad to each other, and a coil driver for applying drive signals to the first pad and the second pad.

[0035] One embodiment of the present invention provides a foldable electronic device, comprising: a touch sensor; and a ring coil located below the touch sensor, wherein the ring coil includes a ferrite sheet located in a region other than the folded region forming a curved surface in the folded state and an antenna loop located on the ferrite sheet.

[0036] One embodiment of the present invention provides an electronic device comprising: a resonant circuit configured to include a loop coil and a capacitor connected in parallel with the loop coil; a blocking capacitor connected in series with the resonant circuit; and a power supply configured to transmit a drive signal of a predetermined frequency to the blocking capacitor.

[0037] One embodiment of the present invention provides an electronic device comprising: a loop coil; and a coil driver configured to apply a drive signal of a predetermined frequency to both ends of the loop coil, and the coil driver applying drive signals having opposite phases to both ends of the loop coil.

[0038] One embodiment of the present invention provides an electronic device comprising: a touch sensor configured to include touch electrodes; and a loop coil configured to have different winding spacing corresponding to the arrangement of the touch electrodes.

[0039] One embodiment of the present invention provides an electronic device comprising: a loop 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 driving signal to the loop coil; a driver / receiver configured to apply the driving signal to the plurality of first touch electrodes and the plurality of second touch electrodes and to receive sensing signals from the first touch electrodes and the second touch electrodes; and a controller configured to control the coil driver to change the duration of coil driver operation based on the sensing signals output from the receiver.

[0040] One embodiment of the present invention provides an electronic device comprising: a loop 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 loop coil during a first time period and to 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.

[0041] The drive receiver can receive the sensing signal in sync with the pulses of the horizontal synchronization signal.

[0042] The controller generates touch information by using some of the sensing signals received during a sensing period determined in response to the horizontal synchronization signal.

[0043] The controller determines the sensing period as follows: 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, wherein the predetermined second moment may exceed the predetermined first moment.

[0044] The controller can determine the sensing period as the period excluding the period when the scan signal applied to one of the pixels is at the enabled level.

[0045] The controller can determine the sensing period as the period excluding the period when a data signal is applied to one of the pixels.

[0046] The drive receiver can receive the sensing signal at two moments with opposite phases within one frequency cycle of the drive signal.

[0047] The controller can generate touch information by using the difference between the sensing signals received at the two said times.

[0048] The display driver can also apply an emission control signal to control the emission of the pixel, and the two moments can be within a time period excluding the moment when the emission control signal applied to one of the pixels changes to the enable level.

[0049] The frequency of the drive signal can be an integer multiple of the frequency of the horizontal synchronization signal, wherein the integer is greater than or equal to 2.

[0050] A touch device on a display, the display showing an image of a frame by applying scan signals and data signals 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 time period and to receive a sensing signal from at least one of the electrodes during a second time period after the first time period, the sensing signal having a predetermined phase difference with the drive signal; and a controller configured to generate touch information 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.

[0051] The drive receiver can receive the sensing signal in sync with the pulses of the horizontal synchronization signal.

[0052] The controller can generate touch information by using some of the sensing signals received during a sensing period determined in response to the horizontal synchronization signal.

[0053] The controller determines the sensing period as follows: 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, wherein the predetermined second moment may exceed the predetermined first moment.

[0054] The controller can determine the sensing period as the period excluding the period when the scan signal applied to one of the pixels is at the enabled level.

[0055] The controller can determine the sensing period as the period excluding the period when a data signal is applied to one of the pixels.

[0056] The drive receiver can receive the sensing signal at two moments with opposite phases within one frequency cycle of the drive signal.

[0057] The controller can generate touch information by using the difference between the sensing signals received at two moments.

[0058] The frequency of the drive signal can be an integer multiple of the frequency of the horizontal synchronization signal, wherein the integer is greater than or equal to 2.

[0059] 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 being configured to include a plurality of pixels, the display driver being 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 loop coil during a first time period and to receive a sensing signal from at least one of the touch electrodes during a second time period following 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.

[0060] One embodiment of the present invention provides a display device comprising: a loop coil; a coil driver configured to apply a drive signal of a predetermined frequency to the loop coil; a touch electrode; and a touch driver configured to receive a sensing signal from the touch electrode, wherein the touch driver receives the sensing signal during a period in which no drive signal is applied.

[0061] One embodiment of the present invention provides a display device comprising: a loop coil; a touch panel configured to include a plurality of touch electrodes; and a driver / receiver configured to apply a drive signal with a frequency corresponding to the resonant frequency of a stylus to the loop coil and to receive a sensing signal from the touch electrodes, the drive signal including a first drive signal and a second drive signal having a different phase from the first drive signal.

[0062] One embodiment of the present invention provides a stylus comprising: a main body; a conductive tip configured to be exposed from the interior of the main body to the exterior 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 in multiple layers on 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.

[0063] One embodiment of the present invention provides a stylus comprising: a housing; a conductive tip configured to expose at least a portion of the housing to the outside; a resonant circuit located in the housing for resonating with a magnetic signal; and a conductive blocking member positioned corresponding to the portion of the housing where the conductive tip is exposed to the outside.

[0064] One embodiment of the present invention provides a stylus comprising: a main body; a conductive tip configured to be exposed from the interior of the main body to the exterior of the main body; a grounding 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 grounding portion, and including 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.

[0065] One embodiment of the present invention provides a stylus comprising: a sensor configured to sense 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 based on the sensed value of the sensor.

[0066] One embodiment of the present invention provides a stylus, comprising: a resonant circuit; an inductor coupled to the resonant circuit via mutual inductance; and an active module coupled to the inductor.

[0067] Beneficial effects

[0068] According to the implementation method, it has the following advantages: it can reduce the manufacturing cost of the antenna module and the electronic device including the antenna module.

[0069] According to the implementation method, it has the following advantages: it can provide a thinner and smaller shape factor.

[0070] It has the following advantages: improved signal-to-noise ratio (SNR) of the signal output from the stylus.

[0071] According to the implementation method, the sensitivity of receiving touch input can be improved.

[0072] According to the implementation method, the touch position can be accurately calculated.

[0073] According to the implementation method, it has the following advantages: it can perform the rejection of the palm.

[0074] According to the implementation method, it has the following advantages: it can reduce the power consumption of the antenna module and the electronic device including the antenna module.

[0075] According to the implementation method, it has the following advantages: increased energy transmitted to the stylus.

[0076] According to the implementation method, the following advantages are available: the power required to use the stylus can be transmitted while using the stylus without the need for separate wireless charging.

[0077] According to the implementation method, it has the following advantages: it can reduce the manufacturing cost of the antenna module and the electronic device including the antenna module.

[0078] According to the implementation method, the following advantages are available: the energy consumption of the touch sensor can be reduced by reducing the energy consumption during the period when the drive signal is output to the touch sensor for resonance of the stylus.

[0079] According to the implementation method, it has the following advantages: the touch sensing performance of the stylus can be improved in an environment where noise exists in the frequency band of the resonant signal similar to that of the stylus.

[0080] According to the implementation method, the following advantages are available: by proposing an optimal structure for the resonant circuit of a stylus, sufficient output signal can be generated even with a small diameter.

[0081] According to at least one embodiment of the present invention, a stylus can be provided to prevent accidental touch input.

[0082] According to the implementation method, it has the following advantages: it can provide a stylus that is robustly resistant to external factors.

[0083] According to the implementation method, it has the following advantages: detecting additional input from users using a stylus.

[0084] According to the implementation method, it has the following advantages: wireless charging of the stylus in use.

[0085] According to the implementation method, it has the following advantages: it can charge the stylus more quickly.

[0086] According to the implementation method, it has the following advantages: reducing the power consumption used to charge the stylus. Attached Figure Description

[0087] Figure 1 A schematic diagram showing a stylus and an electronic device is presented.

[0088] Figure 2 A block diagram schematically showing an electronic device is shown.

[0089] Figure 3 A stylus is shown according to one embodiment.

[0090] Figure 4 The illustration shows the use of a stylus on an electronic device according to one embodiment.

[0091] Figure 5 An example of implementing an antenna pattern on one surface of a substrate is shown.

[0092] Figures 6 to 11 Each shows a schematic circuit diagram of a stylus and an electronic device.

[0093] Figures 12 to 14 A partial view showing an antenna module according to a first embodiment and an electronic device including the antenna module is shown.

[0094] Figure 15 and Figure 16 A partial view showing an antenna module according to a second embodiment and an electronic device including the antenna module is shown.

[0095] Figure 17 and Figure 18 A partial view showing an antenna module according to a third embodiment and an electronic device including the antenna module is shown.

[0096] Figure 19 and Figure 20 A partial view showing an antenna module according to a fourth embodiment and an electronic device including the antenna module is shown.

[0097] Figure 21 and Figure 22 A partial view showing an antenna module according to a fifth embodiment and an electronic device including the antenna module is shown.

[0098] Figure 23 The diagram shows a stylus and a portable electronic device.

[0099] Figure 24 and Figure 25 This illustrates the use of a stylus on a foldable electronic device using conventional methods.

[0100] Figure 26 and Figure 27 A foldable electronic device according to one embodiment is shown.

[0101] Figures 28 to 33 A view showing the arrangement of a touch panel and a ring coil according to various aspects of one embodiment is presented.

[0102] Figure 34 A portion of a touch module according to one embodiment is shown schematically.

[0103] Figure 35 The driving signal of the loop coil and the resonant signal of the stylus are shown according to one embodiment.

[0104] Figure 36 and Figure 37 A foldable electronic device according to another embodiment is shown.

[0105] Figures 38 to 41 A view showing the arrangement of the touch panel and the ring coil according to various aspects of another embodiment is shown.

[0106] Figure 42 A portion of a touch module according to one embodiment is shown schematically.

[0107] Figure 43 The illustration shows various positions of a stylus near a foldable electronic device according to another embodiment.

[0108] Figure 44 The driving signal of the loop coil and the resonant signal of the stylus are shown according to the position of the stylus.

[0109] Figures 45 to 47 This schematically illustrates when applied Figure 44 The magnetic field generated when the driving signal is applied.

[0110] Figure 48 and Figure 49 Each shows the arrangement of the touch panel and the ring coil.

[0111] Figure 50 Showing more details Figure 48 The arrangement of the touch panel and the loop coil.

[0112] Figures 51 to 55 A view showing the arrangement of a touch panel and a ring coil according to various aspects of one embodiment is presented.

[0113] Figure 56 A graph comparing touch signals and noise signals is shown, based on an example and a comparison example.

[0114] Figures 57 to 60 A view showing the arrangement of the touch panel and the ring coil according to various aspects of another embodiment is shown.

[0115] Figure 61 and Figure 62 Each shows a schematic circuit diagram of a stylus and an electronic device.

[0116] Figure 63 An antenna module and a stylus are shown according to one embodiment.

[0117] Figure 64 The driving signal applied to the loop coil by the coil driver and the resonant signal of the stylus are shown.

[0118] Figure 65 The diagram illustrates a drive signal applied to a loop coil by a coil driver and a resonant signal from a stylus, according to one embodiment.

[0119] Figure 66 Specifically shown Figure 65 Coil driver.

[0120] Figures 67 to 69 Each shows the arrangement of the touch sensor and the loop coil.

[0121] Figures 70 to 74 Each shows the state of the stylus approaching the electronic device.

[0122] Figure 75 and Figure 76 Each shows the state of a stylus approaching an electronic device to send and receive signals.

[0123] Figure 77 The specific display is shown. Figure 3 stylus and Figure 2 A schematic diagram of an electronic device.

[0124] Figure 78 The specific display is shown. Figure 77 A schematic diagram of the inductor section of a stylus.

[0125] Figure 79 The inductance and Q values ​​are shown as they vary with frequency.

[0126] Figure 80 and Figure 81 Enameled wire and stranded wire are shown respectively.

[0127] Figure 82 A multi-layer winding scheme is shown.

[0128] Figures 83 to 85 A graph showing the results of the comparative experiment is presented.

[0129] Figure 86 It shows Figure 77 Another example of the inductor section of a stylus.

[0130] Figure 87 and Figure 88 A graph showing the amplitude of the resonant signal according to the structure of the inductor section is shown.

[0131] Figure 89 and Figure 90 Other examples of resonant circuits are shown.

[0132] Figure 91 This demonstrates touch input generated by hovering the stylus.

[0133] Figure 92 The diagram illustrates a stylus and an electronic device when held in hand.

[0134] Figure 93 and Figure 94 Each shows a schematic circuit diagram of the stylus and electronic device when the stylus is held in hand.

[0135] Figure 95 A schematic diagram of a stylus is shown.

[0136] Figure 96 The display shows Figure 95 An example diagram of eddy currents generated in a stylus is shown.

[0137] Figures 97 to 105 A schematic diagram showing the structure of a stylus according to several embodiments is shown.

[0138] Figure 106 and Figure 107 A schematic diagram showing the structure of a blocking member of a stylus according to several embodiments is shown.

[0139] Figure 108 The illustration shows touch input generated by hovering a stylus according to various embodiments.

[0140] Figures 109 to 111 A schematic diagram showing the structure of the main body of a stylus according to several embodiments is shown.

[0141] Figure 112 A schematic diagram of a stylus demonstrating an LLC structure is shown.

[0142] Figure 113 Various examples of blocking components are shown.

[0143] Figure 114 The driving timing of a touch sensor according to one embodiment is illustrated schematically.

[0144] Figures 115 to 118 The driving timing of a touch sensor according to several embodiments is shown.

[0145] Figures 119 to 124 A waveform diagram showing the drive signals according to various aspects of one embodiment is shown.

[0146] Figure 125 A flowchart illustrating a driving method for an electronic device according to one embodiment is shown.

[0147] Figure 126 The display shows according to Figure 125 The timing diagram shows an example of the horizontal synchronization signal Hsync and the drive signal for the driving method.

[0148] Figure 127 A schematic display is shown. Figure 2 A block diagram of one aspect of the display unit.

[0149] Figure 128 It shows Figure 127 The pixels of the display unit.

[0150] Figure 129 The display shows the drive Figure 127 A timing diagram of an example of the drive signals for the display unit.

[0151] Figure 130 and Figure 131 Each shows an electronic device according to one embodiment. Figure 125 The timing diagram of the driving method receiving the sensing signal, wherein... Figure 126 The horizontal synchronization signal of the display unit synchronously receives the sensing signal.

[0152] Figure 132 A schematic display is shown. Figure 2 A block diagram of another aspect of the display unit.

[0153] Figure 133 It shows Figure 132 The pixels of the display unit.

[0154] Figure 134 An electronic device according to one embodiment is shown. Figure 125 The timing diagram of the driving method receiving the sensing signal, wherein... Figure 132 The horizontal synchronization signal of the display unit synchronously receives the sensing signal.

[0155] Figure 135 A flowchart illustrating a control method for an electronic device according to another embodiment is shown.

[0156] Figure 136 The arrangement of the touch panel and the loop coil of an electronic device according to one embodiment is shown.

[0157] Figure 137 The diagram illustrates a drive signal applied to a loop coil by a coil driver and a resonant signal from a stylus, according to one aspect.

[0158] Figure 138 The diagram illustrates a driving signal applied to the loop coil by a coil driver and a resonant signal from a stylus, according to another aspect.

[0159] Figure 139 A view is shown to illustrate the effect of noise on the touch sensing performance of a touch sensor.

[0160] Figure 140 A flowchart of a touch detection method according to one embodiment is shown.

[0161] Figure 141 A description is shown Figure 140 A view of the noise filtering method in the touch detection method.

[0162] Figures 142 to 145 Waveform diagrams are shown for examples of the first and second drive signals output by the touch sensor having different phases.

[0163] Figure 146 An equivalent circuit diagram is shown for displaying a stylus and a touch sensor that receives sensing signals.

[0164] Figure 147 A schematic diagram showing a stylus according to one embodiment is shown.

[0165] Figure 148 A schematic diagram of a stylus is shown, illustrating resonant circuits that resonate with drive signals of different frequencies.

[0166] Figure 149 A flowchart illustrating a control method for an electronic device according to another embodiment is shown.

[0167] Figure 150 The display shows according to Figure 149 Waveform diagrams of drive signals and resonant signals for control methods of electronic devices.

[0168] Figure 151 A flowchart illustrating a control method for an electronic device according to another embodiment is shown.

[0169] Figure 152 The display shows according to Figure 151 Waveform diagram of an example of the drive signal for the control method of an electronic device.

[0170] Figures 153 to 158 Each shows a schematic circuit diagram of a stylus and an electronic device.

[0171] Figure 159 A stylus and electronic device according to one embodiment are partially shown.

[0172] Figure 160 A flowchart illustrating sensor input operations of a stylus and an electronic device according to one embodiment is shown.

[0173] Figure 161 The display shows according to Figure 160 Waveform diagrams of example driving signals and resonant signals.

[0174] Figure 162 A flowchart illustrating the operation of changing the resonant frequency of a stylus and electronic device according to one embodiment is shown.

[0175] Figure 163 The display shows according to Figure 162 Waveform diagrams of example driving signals and resonant signals.

[0176] Figure 164 A stylus and electronic device according to one embodiment are partially shown.

[0177] Figure 165 A flowchart illustrating sensor input operations of a stylus and an electronic device according to another embodiment is shown.

[0178] Figure 166 A flowchart illustrating the operation of changing the resonant frequency of a stylus and electronic device according to another embodiment is shown.

[0179] Figure 167 and Figure 168 A schematic circuit diagram showing a stylus and electronic device is shown.

[0180] Figure 169 and Figure 170 schematically shown Figure 168 A stylus.

[0181] Figure 171 A schematic circuit diagram showing a stylus and an electronic device according to one embodiment is shown.

[0182] Figure 172 and Figure 173 schematically shown Figure 171 A stylus.

[0183] Figures 174 to 176 A stylus and electronic device according to various aspects of one embodiment are shown in part.

[0184] Figure 177 A block diagram showing the touch module and the host is shown.

[0185] Figure 178 An example of touch data provided from the touch module to the host is shown. Detailed Implementation

[0186] In the following description, various embodiments of this 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 to the embodiments of this application. Similar reference numerals may be used for similar parts in conjunction with the description of the accompanying drawings.

[0187] Furthermore, since the dimensions and thicknesses of the constituent components shown in the accompanying drawings are arbitrarily given for better understanding and ease of description, the present invention is not limited to the dimensions 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.

[0188] It should be understood that when an element such as a layer, film, region, or substrate is referred to as "on another element," it can be directly on another element, or there may be intermediate elements present. In contrast, when an element is referred to as "directly on another element," there are no intermediate elements present. Furthermore, in this specification, "on" or "above" means located above or below the target portion and does not necessarily mean located on the upper side of the target portion based on the direction of gravity.

[0189] In this document, expressions such as “have,” “may have,” “include,” or “may include” mean that a corresponding feature (e.g., a value, function, operation, or component such as a part) is present, and do not exclude the presence of additional features.

[0190] In this document, expressions such as “A or B”, “at least one of A and / or B”, or “one or more of A and / or B” can 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) can refer to all cases that include at least A and at least B.

[0191] The terms "first" or "second" used herein may modify various elements regardless of their order and / or importance, and may change one element to another; they are used only to distinguish parts and do not limit those parts. For example, a first user equipment and a second user equipment may represent different user equipment regardless of their order or importance. For example, a first component may be referred to as a second component without departing from the scope of the claims described herein, and similarly, a second component may be renamed as a first component.

[0192] When a component (e.g., a first component) is (operably or communicatively) "connected or linked" to another component (e.g., a second component), it should be understood that one component can be directly connected to the other component or connected to the other component through another component (e.g., a third component). When a component (e.g., a first component) is directly "connected or linked" to another component (e.g., a second component), it can be understood that there is no other component (e.g., a third component) between one component and the other.

[0193] As used herein, the expression “configured to” depends on the specific context; for example, “suitable for,” “capable of,” “designed for,” “applicable to,” “used for,” or “able to” may be used interchangeably. The term “configured” does not necessarily mean only that hardware is “specifically designed for.” Rather, in some cases, the expression “a device configured to…” can indicate that the device, along with other devices or components, is “capable of…”. For example, the phrase “processors configured to perform A, B, and C” can refer to a general-purpose processor (e.g., a CPU or application processor) capable of performing the corresponding operations by executing one or more software programs stored in a dedicated processor (e.g., an embedded processor) or storage device for performing the corresponding operations.

[0194] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of other embodiments. Unless the context clearly indicates otherwise, the singular form should include the plural form. The terminology used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art as described herein. Among the terms used herein, those defined in general dictionaries may be interpreted as having the same or similar meaning as in the relevant technical context and should not be construed as ideal or overly formal unless explicitly defined herein. In some cases, even terms defined herein may not be construed as excluding the embodiments described herein.

[0195] Electronic devices according to various embodiments of this document may include at least one of, for example, smartphones, tablet PCs, mobile phones, video phones and e-book readers, laptop PCs, netbooks, mobile medical devices, cameras, or wearable devices. Wearable devices, according to various embodiments, may include at least one of accessory types (e.g., watches, rings, bracelets, anklets, necklaces, glasses, contact lenses, or head-mounted devices (HMDs)), (e.g., skin pads or tattoos), or bio-implants (e.g., implantable circuitry).

[0196] In the following description, an electronic device and its driving method according to an embodiment will be described with reference to the accompanying drawings.

[0197] Figure 1 The diagram shows a stylus and an electronic device. Figure 2 A block diagram schematically showing an electronic device is shown. Figure 3 A stylus is shown according to one embodiment.

[0198] like Figure 1 As shown, the stylus 10 can receive signals from the electronic device 2 near its touchscreen 20 or output from the touchscreen 20, and can also send signals to the touchscreen 20.

[0199] Electronic device 2 may include wireless communication unit 210, memory 220, interface unit 230, power supply unit 240, display unit 250, touch module 260, controller 270, etc. Figure 2 The constituent elements shown are not necessary for realizing the electronic device; therefore, the electronic device described in this application may include more or fewer constituent elements than those listed above.

[0200] Specifically, among these components, 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. Furthermore, the wireless communication unit 210 may include at least one module for connecting the electronic device 2 to at least one network.

[0201] The wireless communication unit 210 may include a wireless internet module 211 and a short-range communication module 212.

[0202] Wireless Internet module 211 refers to a module used for wireless Internet connectivity and can be embedded in electronic device 2. Wireless Internet module 211 is configured to transmit and receive wireless signals in a communication network according to wireless Internet technologies. Examples of wireless Internet technologies include Wireless Local Area Network (WLAN), Wi-Fi, Wi-Fi Direct, Digital Living Network Alliance (DLNA), WiBro, Global Microwave Access Interoperability (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 wireless Internet module 211 transmits and receives data according to at least one wireless Internet technology within the scope of this range, including Internet technologies not listed above.

[0203] The short-range communication module 212 is used for short-range communication and can be used via Bluetooth. TM The short-range communication module 212 supports at least one of the following technologies: 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 containing an external server via a wireless local area network (WLAN). The WLAN can be a wireless personal area network (WPAN).

[0204] In this document, a device capable of wireless communication can be a mobile terminal capable of exchanging (or interoperating) data with the electronic device 2 according to the present invention, such as a smartphone, tablet computer, or laptop computer. The short-range communication module 212 can detect (or identify) wireless communication devices capable of communicating with the electronic device 2 around the electronic device 2. Furthermore, when the detected wireless communication device is authenticated as a device capable of communicating with the electronic device 2 according to the described embodiment, the controller 270 can transmit at least some of the data processed by the electronic device 2 to the wireless communication device via the short-range communication module 212. Therefore, a user of the wireless communication device can use the data processed in the electronic device 2 through that wireless communication device.

[0205] In addition, memory 220 stores data that supports various functions of electronic device 2. Memory 220 can store multiple applications (or programs), data used to operate electronic device 2, and commands driven within electronic device 2.

[0206] Interface unit 230 serves as a channel for connecting to various external devices of electronic device 2. 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 to a device equipped with an identification module, an audio input / output (I / O) port, a video I / O port, and an earphone port.

[0207] The power supply unit 240 receives power from both an external and internal power source, and, under the control of the controller 270, supplies power from the power sources to each constituent element included in the electronic device 2. The power supply unit 240 includes a battery, which may be an embedded battery or a replaceable battery.

[0208] Display unit 250 displays (outputs) information processed by electronic device 2. For example, display unit 250 may display execution image information of an application driven in electronic device 2, or user interface (UI) and graphical user interface (GUI) information based on the execution image information.

[0209] 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, etc.

[0210] Display unit 250 includes a display panel 251 for displaying images and a display controller 252 connected to the display panel 251 to supply signals for displaying images to the display panel 251. For example, the display panel 251 may include multiple pixels connected to signal lines (such as multiple scan lines and multiple data lines) and a scan driver / receiver for supplying scan signals to the scan lines. The display controller 252 may include a data driver IC for generating data signals applied to the data lines, a timing controller for controlling the overall operation of the display unit 250 by processing image signals, and a power management IC.

[0211] Touch module 260 senses touch (or touch input) applied to the touch area using a capacitive method. As an example, touch module 260 can be configured to convert changes in capacitance, voltage, current, etc., generated in a specific area into an electrical input signal. Touch module 260 can be configured to detect the position, area, capacitance, etc., of the touch point when a touch object applies a touch to the touch area. In this document, "touch object" refers to the object that applies a touch to the touch sensor, and can be, for example, a user's body part (finger, palm, etc.), a passive or active stylus 10, etc.

[0212] The touch module 260 includes a touch sensor 261 and a touch controller 262. Touch electrodes are located in the touch sensor 261. The touch controller 262 is configured to transmit touch data to the controller 270 and / or the display controller 252 by applying a drive signal to the touch sensor 261 and receiving sensing signals from the touch sensor 261.

[0213] The touch controller 262 may be connected to at least one of a plurality of first touch electrodes to apply a drive signal, and may 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 drive 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 to acquire a touch position by using the sensing signals output from the first driver / receiver and the second driver / receiver.

[0214] The display panel 251 and the touch sensor 261 can be referred to as a touch screen 20 by forming an interlayer structure or by forming a single piece.

[0215] The touch module 260 also 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 in the electronic device 2. The loop coil 264 can also be configured as an antenna for a short-range communication module 212 (e.g., RFID or NFC). The drive signal includes an alternating current or an alternating voltage with a predetermined frequency.

[0216] The controller 270 can control the driving of the electronic device 2 and can output touch coordinate information in response to the touch detection result of the electronic device 2. In addition, the controller 270 can change the frequency of the driving signal in response to its touch detection result.

[0217] In addition to operations related to the application, the controller 270 typically 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 aforementioned constituent elements, thereby providing or processing appropriate information or functions for the user.

[0218] In addition, the controller 270 can control the reference. Figure 2 At least a portion of the constituent elements described are used to drive an application stored in memory 220. Furthermore, controller 270 can combine two or more of the constituent elements included in electronic device 2 and operate the combined constituent elements to drive the application.

[0219] Figure 3A stylus according to one embodiment is shown. Styluses 10a, 10b and 10c each include a conductive tip 11 and a resonant circuit 12.

[0220] At least a portion of the conductive tip 11 may be formed of a conductive material (e.g., metal, conductive rubber, conductive fabric, conductive silicone resin, etc.), but the present invention is not limited thereto.

[0221] The resonant circuit 12 of the LC resonant circuit can resonate with the drive signal output from the loop coil 264. The drive signal can include a signal (e.g., a sine wave, square wave, etc.) having a frequency corresponding to the resonant frequency of the resonant circuit 12. For resonance to occur, the resonant frequency of the resonant circuit 12 and the frequency of the drive signal must be the same or very similar. The resonant frequencies of the styluses 10a, 10b, and 10c depend on the design values ​​of the resonant circuit 12 of the styluses 10a, 10b, and 10c. When the loop coil 264 generates a magnetic field through the drive signal, the resonant circuit 12 of the stylus 10 uses the signal received through the change in the magnetic field to generate resonance.

[0222] The components of each of the styluses 10a, 10b, and 10c can be housed within a housing. The housing can have a cylindrical shape, a polygonal shape, a columnar shape with at least a portion of a curved surface, a convex shape, a truncated pyramidal shape, a truncated conical shape, etc., but is not limited thereto. Because the housing has a hollow interior, the components of each of the styluses 10a, 10b, and 10c, such as the conductive tip 11 and the resonant circuit 12, can be housed within it. The housing can be made of a non-conductive material.

[0223] Figure 3 The stylus 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 outputs the resonant energy directly through the conductive tip 11.

[0224] The resonant signal generated by the resonance can be output to the touchscreen 20 via the conductive tip 11 during the period when the drive signal is input to the loop coil 264 and thereafter. The resonant circuit 12 is located in the housing and is electrically connected to ground.

[0225] Figure 3 The stylus 10b shown in (b) includes a conductive tip 11, a resonant circuit 12, a rectifier 13, a power storage device 14, and an active circuit 15. Additionally, the stylus 10 may also include a sensor (not shown) and / or a communication module (not shown).

[0226] The resonant circuit 12 can generate resonance using energy transmitted from the toroidal coil 264, and the resonant energy can be rectified in the rectifier 13 to charge the power storage device 14. The power storage device 14 includes a rechargeable battery or capacitor, such as an electric double-layer capacitor (EDLC).

[0227] The active circuit 15 can receive power from the power storage device 14 to change the amplitude, frequency, phase, etc. of the resonant signal transmitted to the touch screen 20. In addition, the active circuit 15 can send additional signals other than touch input to the short-range communication module 212 of the electronic device 2.

[0228] Figure 3 The stylus 10c shown in (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.

[0229] The resonant circuit 12 uses energy transmitted from the loop coil 264 to generate resonance and outputs the resonant energy directly through the conductive tip 11. The active handwriting module 60 can receive power from the battery 50 to send signals to the touchscreen 20.

[0230] Figure 4 The illustration shows the use of a stylus on an electronic device according to one embodiment.

[0231] 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 ring coil 264 below the display panel 251.

[0232] The touch sensor 261 may include a substrate 23, a touch electrode layer 21 above the substrate 23, and a window 22 above the touch electrode layer 21.

[0233] The substrate 23 may be the encapsulation substrate of the display panel 251 or the color filter substrate of the display panel 251, and the substrate is preferably made of a transparent material.

[0234] 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. Although the touch electrode layer 21 in... Figure 4 The first touch electrode and the second touch electrode are shown as a single layer, but they can be located on different layers, or they can be positioned to overlap each other, or they can be positioned not to overlap each other, or a separate layer can be set between them.

[0235] Window 22 may be located on touch electrode layer 21. Touch electrode layer 21, conductive tip 11, and window 22 can generate capacitance. Therefore, signals generated by stylus 10 (resonant signals or active touch signals) can be transmitted to touch electrode layer 21 through capacitance.

[0236] 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 referred to below. Figures 14 to 19 As described, in addition to the substrate 24, the antenna ring may also be located on the same layer as the touch electrode layer 21. In this case, the antenna ring may be formed of a conductive material with high transmittance and low impedance, such as ITO, graphene, silver nanowires, etc. Furthermore, the antenna ring may be located below the window 22, and in this case, the substrate 24 may not be included in the ring coil 264.

[0237] Substrate 24 can be attached to the rear surface of display panel 251. Substrate 24 can be located on the rear surface of display panel 251. Substrate 24 can be a single-layer flexible printed circuit board (FPCB) (e.g., single-sided FPCB, double-sided FPCB) or a multi-layer FPCB, but preferably, touch screen 20 can be a single-sided or double-sided FPCB, i.e., a single-layer FPCB, to achieve thinness and miniaturization of the FPCB. Because such a single-sided FPCB can be manufactured very thin, it can be used in flexible, foldable, and stretchable electronic devices. Figure 4 The substrates 23 and 24 in the figure can be FPCB or rigid printed circuit board (PCB).

[0238] When substrate 24 is formed from a double-sided FPCB, the conductive layer may be located on the second surface relative to the first surface where the antenna ring is located. The conductive layer is made of a conductive material and may be, for example, a copper foil layer.

[0239] The substrate 24 may include a base film. The base film may be made of polyimide resin, epoxy resin, or another known flexible material. The base film may be flexible. At least one antenna loop, configured to include at least one wire, may be formed on the base film.

[0240] Reference Figure 5 The antenna ring 241 formed on the substrate 24 is described.

[0241] Figure 5 An example of implementing an antenna pattern on one surface of a substrate is shown.

[0242] Reference Figure 5The antenna ring 241 is formed as a conductive line on the base film 242. For example, the antenna ring can be printed on the base film 242 by photolithography, thin film sputtering, or the like. The method for positioning the antenna ring on the base film 242 is not limited to the methods described above.

[0243] Antenna ring 241 has a spiral pattern that depends on the inductance design value and radiation performance of antenna ring 241. However, when the spiral pattern is implemented only on one surface of the base film 242, the wires of antenna ring 241 have the following problem: these wires may short-circuit with each other at point SP on one surface of the base film 242. It is possible to implement this spiral pattern by using a double-sided FPCB. For example, an opening or hole can be formed in the base film 242 through which wires on the first surface can be connected to wires on the second surface. However, when the copper foil layer is attached to the second surface of the double-sided FPCB, the following problem may occur: the wires on the second surface and the copper foil layer may come into contact or become electrically connected to each other.

[0244] Next, we will refer to Figures 6 to 13 Examples of how styluses and electronic devices send and receive signals.

[0245] Figures 6 to 11 Each shows a schematic circuit diagram of a stylus and an electronic device.

[0246] Figure 3 The resonant circuit 12 can be represented as an equivalent circuit including resistor Rp, inductor Lp and capacitor Cp, or an equivalent circuit including resistor Rs, inductor Ls and capacitor Cs.

[0247] like Figure 6 and Figure 7 As shown, when the loop coil L0 forms a magnetic field through the power supply 40 that transmits the drive signal, a current can be induced in the inductor LP of the stylus 10 to make the resonant circuit 12 resonate.

[0248] like Figures 8 to 11 As shown, when the power supply 40 that transmits the driving signal causes the loop coil and the internal capacitor to resonate, the resonant circuit 12 of the stylus 10 can also resonate with the loop coil and the internal capacitor.

[0249] Figure 8 The following situation is shown: the loop coil Ldp and the internal capacitor Cdp are connected in parallel, and the resistor Rp, inductor Lp and capacitor Cp of the resonant circuit 12 are connected in parallel.

[0250] Figure 9 The following situation is shown: the loop coil Ldp and the internal capacitor Cdp are connected in parallel, and the resistor Rs, inductor Ls and capacitor Cs of the resonant circuit 12 are connected in series.

[0251] Figure 10 The following situation is shown: the loop coil Lds and the internal capacitor Cds are connected in series, and the resistor Rp, inductor Lp and capacitor Cp of the resonant circuit 12 are connected in parallel.

[0252] Figure 11 The following situation is shown: the loop coil Lds and the internal capacitor Cds are connected in series, and the resistor Rs, inductor Ls and capacitor Cs of the resonant circuit 12 are connected in series.

[0253] Next, we will refer to Figures 12 to 22 An antenna loop according to the present invention, wherein a spiral pattern is implemented on a plane, is described. In the following text, references will be omitted. Figure 4 The description of the component is the same as the description of the component.

[0254] Figures 12 to 14 A partial view showing an antenna module according to a first embodiment and an electronic device including the antenna module is shown.

[0255] like Figure 12 As shown, multiple sub-antenna rings 241a and 241b are located on the base film 242. The antenna rings 241 can be formed of conductive materials with high transmittance and low impedance, such as ITO, graphene, silver nanowires, etc.

[0256] Figure 13 It shows along Figure 12 The cross-sectional view taken by line A-A'. For example... Figure 13 As shown, sub-antenna rings 241a and 241b are shown located on a surface of the base film 242 spaced apart from the ferrite sheet 25, but the invention is not limited thereto.

[0257] Sub-antenna rings 241a and 241b are spaced apart from each other on one surface of the base film 242 and do not directly contact each other. A first end of the first sub-antenna ring 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 the second sub-antenna ring 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.

[0258] Each of the sub-antenna rings 241a and 241b can be a conductive line extending along the boundary of the display area DP. Although each of the sub-antenna rings 241a and 241b is shown as having an overall rectangular shape, they can have shapes such as circular, elliptical, polygonal, or polygonal with rounded corners, but the invention is not limited thereto.

[0259] Furthermore, the first sub-antenna ring 241a is located outside the second sub-antenna ring 241b. The first sub-antenna ring 241a may extend along the periphery of the second sub-antenna ring 241b. The shortest distance between adjacent first sub-antenna rings 241a and second sub-antenna rings 241b may be the same on one surface of the base film 242, but the invention is not limited thereto. The first sub-antenna rings 241a and second sub-antenna rings 241b may be wires with the same width, but the invention is not limited thereto. The first sub-antenna rings 241a and second sub-antenna rings 241b may be made of the same material, but the invention is not limited thereto.

[0260] The flexible circuit board 27 can be connected to multiple pads 243a, 243b, 243c, and 243d of the base film 242. The flexible circuit board 27 can be a flexible printed circuit board (FPCB). The coil driver 263 is mounted on the flexible circuit board 27.

[0261] The flexible circuit board 27 can be electrically connected to pads 243a, 243b, 243c, and 243d. For example, multiple pads (not shown) on the flexible circuit board 27 connected to multiple signal transmission lines 271a and 271b and connecting line 272 can be connected to pads 243a, 243b, 243c, and 243d via connector 26. Connector 26 can be a ZIF connector (zero insertion force connector), a BTB connector (board-to-board connector), etc., but the invention is not limited thereto. The socket of connector 26 is formed on substrate 24, and the pads (not shown) and pads 243a, 243b, 243c, and 243d can be electrically connected to each other by inserting the flexible circuit board 27 into the socket of connector 26.

[0262] As another example, the pads (not shown) of the flexible circuit board 27 can be soldered to pads 243a, 243b, 243c, and 243d. For example, the pads (not shown) on the flexible circuit board 27 that connect to signal transmission wires 271a and 271b and to connecting wire 272 can be connected to pads 243a, 243b, 243c, and 243d via external lead soldering (OLB) and anisotropic conductive film (ACF).

[0263] In addition, various connection methods can be used to electrically and physically connect the pads (not shown) of the flexible circuit board 27 to the pads 243a, 243b, 243c and 243d.

[0264] The flexible circuit board 27 includes multiple signal transmission wires 271a and 271b located on a first surface of the flexible circuit board and connecting wires 272 located on a second surface of the flexible circuit board. The wires 271a, 271b, and 272 can be printed by photolithography, thin film sputtering, or the like. The methods for positioning the wires 271a, 271b, and 272 on the flexible circuit board 27 are not limited to the methods described above. Furthermore, although it has been described above that the signal transmission wires 271a and 271b and the connecting wires 272 are located on opposite surfaces of a substrate, they can also be located on different substrates, and the invention is not limited thereto.

[0265] Signal transmission wire 271a connects to pad 243a of the first sub-antenna ring 241a and to coil driver 263, and signal transmission wire 271b connects to pad 243d of the second sub-antenna ring 241b and to coil driver 263.

[0266] Connecting wire 272 connects pad 243b, which is connected to the first sub-antenna ring 241a, to pad 243c, which is connected to the second sub-antenna ring 241b. That is, the first sub-antenna ring 241a and the second sub-antenna ring 241b are electrically connected to each other via connecting wire 272 located on the flexible circuit board 27. Therefore, the current introduced from the coil driver 263 to the pad 243a via the signal transmission wire 271a flows in the following order: first sub-antenna ring 241a, pad 243b, connecting wire 272, pad 243c, second sub-antenna ring 241b, pad 243d, and signal transmission wire 271b.

[0267] In other words, the antenna module according to this embodiment has essentially the same effect as an antenna loop formed in a spiral pattern, without the need to form spiral patterned wires on the base film 242. Since all wires in this antenna module are formed on the first surface of the base film 242, a copper foil layer can be formed on the second surface, thereby reducing manufacturing costs and decreasing the thickness and size of the touch screen 20.

[0268] The above description has described an example of implementing a spiral pattern using two sub-antenna loops, 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 flexible circuit board 27.

[0269] like Figure 14As shown, multiple antenna rings can be located on the touchscreen 20. A first sub-antenna ring 241a, connecting wire 272a, and a second sub-antenna ring 241b form a spiral pattern of the first antenna ring. A third sub-antenna ring 241c, connecting wire 272b, and a fourth sub-antenna ring 241d form a spiral pattern of the second antenna ring. The first and second antenna rings are spaced apart from each other in the y-axis direction. Here, the ferrite sheet 25 can be individually located in each region of the first and second antenna rings.

[0270] The coil driver 263 can apply a drive signal with the same or similar phase to the first antenna loop and the second antenna loop, can apply a drive signal with opposite phase, or can selectively drive the first antenna loop and the second antenna loop.

[0271] Figure 15 and Figure 16 A partial view showing an antenna module according to a second embodiment and an electronic device including the antenna module is shown.

[0272] Figure 15 and Figure 16 The diagram shows a ring coil 264 including an antenna ring 241 when the touch sensor 261 is implemented as an on-cell type touch sensor, the antenna ring 241 being located on the same layer as the touch electrode layer 21.

[0273] like Figure 15 and Figure 16 As shown, the ring coil 264 includes an antenna ring 241 located on the touch electrode layer 21 and a ferrite sheet 25 located below the display panel 251.

[0274] Figure 16 It shows along Figure 15 The cross-sectional view taken by line B-B'. (See diagram below.) Figure 16 As shown, antenna rings 241a and 241b, as well as touch electrode layer 21, are located in the same layer on the encapsulation substrate 23 of display panel 251. Antenna rings 241a and 241b can be made of the same material as the first and second touch electrodes of touch electrode layer 21. For example, antenna rings 241a and 241b can be formed of conductive materials with high transmittance and low impedance, such as ITO, graphene, silver nanowires, etc. However, antenna rings 241a and 241b can also be located in a different layer from touch electrode layer 21 and can be made of a different material than the first and second touch electrodes.

[0275] Sub-antenna rings 241a and 241b are spaced apart from each other on one surface of the package substrate 23 and do not directly contact each other. A first end of the first sub-antenna ring 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 the second sub-antenna ring 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.

[0276] Each of the sub-antenna rings 241a and 241b can be a conductive line extending along the boundary of the display area DP. Although each of the sub-antenna rings 241a and 241b is shown as having an overall rectangular shape, they can have shapes such as circular, elliptical, polygonal, or polygonal with rounded corners, but the invention is not limited thereto.

[0277] Furthermore, the first sub-antenna ring 241a is located outside the second sub-antenna ring 241b. The first sub-antenna ring 241a may extend along the periphery of the second sub-antenna ring 241b. The shortest distance between adjacent first sub-antenna rings 241a and second sub-antenna rings 241b may be the same on one surface of the packaging substrate 23, but the invention is not limited thereto. The first sub-antenna rings 241a and second sub-antenna rings 241b may be wires with the same width, but the invention is not limited thereto. The first sub-antenna rings 241a and second sub-antenna rings 241b may be made of the same material, but the invention is not limited thereto.

[0278] The flexible circuit board 27 can be connected to multiple pads 243a, 243b, 243c and 243d of the packaging substrate 23.

[0279] Multiple pads (not shown) on the flexible circuit board 27 connected to signal transmission wires 271a and 271b and connecting wire 272 can be electrically connected to pads 243a, 243b, 243c, and 243d. These pads (not shown) can be soldered to pads 243a, 243b, 243c, and 243d. For example, the pads (not shown) can be connected to pads 243a, 243b, 243c, and 243d via external lead bonding (OLB), anisotropic conductive film (ACF), or the like.

[0280] In addition, various connection methods can be used to electrically and physically connect the pads (not shown) to pads 243a, 243b, 243c and 243d.

[0281] The flexible circuit board 27 includes multiple signal transmission wires 271a and 271b located on a first surface of the flexible circuit board and connecting wires 272 located on a second surface of the flexible circuit board. The wires 271a, 271b, and 272 can be printed by photolithography, thin film sputtering, or the like. The methods for positioning the wires 271a, 271b, and 272 on the flexible circuit board 27 are not limited to the methods described above. Furthermore, although it has been described above that the signal transmission wires 271a and 271b and the connecting wires 272 are located on opposite surfaces of a substrate, they can also be located on different substrates, and the invention is not limited thereto.

[0282] Signal transmission wire 271a connects to pad 243a of the first sub-antenna ring 241a and to coil driver 263, and signal transmission wire 271b connects to pad 243d of the second sub-antenna ring 241b and to coil driver 263.

[0283] Connecting wire 272 connects pad 243b, which is connected to the first sub-antenna ring 241a, to pad 243c, which is connected to the second sub-antenna ring 241b. That is, the first sub-antenna ring 241a and the second sub-antenna ring 241b are electrically connected to each other via connecting wire 272 located on the flexible circuit board 27. Therefore, the current introduced from the coil driver 263 to the pad 243a via the signal transmission wire 271a flows in the following order: first sub-antenna ring 241a, pad 243b, connecting wire 272, pad 243c, second sub-antenna ring 241b, pad 243d, and signal transmission wire 271b.

[0284] In other words, the antenna module according to this embodiment has essentially the same effect as an antenna loop formed in a spiral pattern, without the need to form spiral patterned wires on the packaging substrate 23. In this antenna module, all wires are formed on the first surface of the packaging substrate 23, thereby reducing manufacturing costs and decreasing the thickness and size of the touch screen 20.

[0285] Figure 17 and Figure 18 A partial view showing an antenna module according to a third embodiment and an electronic device including the antenna module is shown.

[0286] Figure 17 and Figure 18 The diagram shows a ring coil 264 including an antenna ring 241 when the touch sensor 261 is implemented as an in-cell type touch sensor, the antenna ring 241 being located on the same layer as the touch electrode layer 21.

[0287] like Figure 17 and Figure 18As shown, the ring coil 264 includes an antenna ring 241 located on the touch electrode layer 21 and a ferrite sheet 25 located below the display panel 251.

[0288] Figure 18 It shows along Figure 17 The cross-sectional view taken by line C-C'. (See figure) Figure 18 As shown, antenna rings 241a and 241b and touch electrode layer 21 can be located on the same layer between the color filter substrate 23 and the TFT substrate of the display panel 251. Touch electrode layer 21 and antenna rings 241a and 241b can all be located on the upper and lower parts of the color filter substrate 23.

[0289] Antenna rings 241a and 241b can be made of the same material as the first and second touch electrodes of touch electrode layer 21. For example, antenna rings 241a and 241b can be formed of conductive materials with high transmittance and low impedance, such as ITO, graphene, silver nanowires, etc. However, antenna rings 241a and 241b can also be located in a different layer from touch electrode layer 21 and can be made of a different material than the first and second touch electrodes.

[0290] Sub-antenna rings 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. A first end of the first sub-antenna ring 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 the second sub-antenna ring 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.

[0291] Each of the sub-antenna rings 241a and 241b can be a conductive line extending along the boundary of the display area DP. Although each of the sub-antenna rings 241a and 241b is shown as having an overall rectangular shape, they can have shapes such as circular, elliptical, polygonal, or polygonal with rounded corners, but the invention is not limited thereto.

[0292] Furthermore, the first sub-antenna ring 241a is located outside the second sub-antenna ring 241b. The first sub-antenna ring 241a may extend along the periphery of the second sub-antenna ring 241b. The shortest distance between adjacent first sub-antenna rings 241a and second sub-antenna rings 241b may be the same on one surface of the color filter substrate 23, but the invention is not limited thereto. The first sub-antenna rings 241a and second sub-antenna rings 241b may be wires with the same width, but the invention is not limited thereto. The first sub-antenna rings 241a and second sub-antenna rings 241b may be made of the same material, but the invention is not limited thereto.

[0293] The flexible circuit board 27 can be connected to multiple pads 243a, 243b, 243c and 243d of the color filter substrate 23.

[0294] Multiple pads (not shown) on the flexible circuit board 27 connected to signal transmission wires 271a and 271b and connecting wire 272 can be electrically connected to pads 243a, 243b, 243c, and 243d. These pads (not shown) can be soldered to pads 243a, 243b, 243c, and 243d. For example, the pads (not shown) can be connected to pads 243a, 243b, 243c, and 243d via external lead bonding (OLB), anisotropic conductive film (ACF), or the like.

[0295] In addition, various connection methods can be used to electrically and physically connect the pads (not shown) to pads 243a, 243b, 243c and 243d.

[0296] The flexible circuit board 27 includes multiple signal transmission wires 271a and 271b located on a first surface of the flexible circuit board and connecting wires 272 located on a second surface of the flexible circuit board. The wires 271a, 271b, and 272 can be printed by photolithography, thin film sputtering, or the like. The methods for positioning the wires 271a, 271b, and 272 on the flexible circuit board 27 are not limited to the methods described above. Furthermore, although it has been described above that the signal transmission wires 271a and 271b and the connecting wires 272 are located on opposite surfaces of a substrate, they can also be located on different substrates, and the invention is not limited thereto.

[0297] Signal transmission wire 271a connects to pad 243a of the first sub-antenna ring 241a and to coil driver 263, and signal transmission wire 271b connects to pad 243d of the second sub-antenna ring 241b and to coil driver 263.

[0298] Connecting wire 272 connects pad 243b, which is connected to the first sub-antenna ring 241a, to pad 243c, which is connected to the second sub-antenna ring 241b. That is, the first sub-antenna ring 241a and the second sub-antenna ring 241b are electrically connected to each other via connecting wire 272 located on the flexible circuit board 27. Therefore, the current introduced from the coil driver 263 to the pad 243a via the signal transmission wire 271a flows in the following order: first sub-antenna ring 241a, pad 243b, connecting wire 272, pad 243c, second sub-antenna ring 241b, pad 243d, and signal transmission wire 271b.

[0299] In other words, the antenna module according to this embodiment has essentially the same effect as an antenna ring formed in a spiral pattern, without the need to form spiral patterned wires 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 decreasing the thickness and size of the touch screen 20.

[0300] Figure 19 and Figure 20 A partial view showing an antenna module according to a fourth embodiment and an electronic device including the antenna module is shown.

[0301] like Figure 19 and Figure 20 As shown, the loop coil 264 includes antenna loops 241a and 241b located below window 22, ferrite sheet 25a located below display panel 251, and ferrite sheet 25b located below antenna loops 241a and 241b.

[0302] Figure 20 It shows along Figure 19 The cross-sectional view taken by line D-D'. For example... Figure 20 As shown, antenna rings 241a and 241b can be printed on window 22 by methods such as photolithography or thin film sputtering, or antenna rings 241a and 241b can be printed on the sheet to be attached to window 22 by methods such as photolithography or thin film sputtering. The method of positioning antenna rings 241a and 241b on window 22 is not limited to the above methods.

[0303] Sub-antenna rings 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 the first sub-antenna ring 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 the second sub-antenna ring 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.

[0304] Each of the sub-antenna rings 241a and 241b can be a conductive line extending along the boundary of the display area DP. Although each of the sub-antenna rings 241a and 241b is shown as having an overall rectangular shape, they can have shapes such as circular, elliptical, polygonal, or polygonal with rounded corners, but the invention is not limited thereto.

[0305] Furthermore, the first sub-antenna ring 241a is located outside the second sub-antenna ring 241b. The first sub-antenna ring 241a may extend along the periphery of the second sub-antenna ring 241b. The shortest distance between adjacent first sub-antenna rings 241a and second sub-antenna rings 241b may be the same on one surface of window 22, but the invention is not limited thereto. The first sub-antenna rings 241a and second sub-antenna rings 241b may be wires of the same width, but the invention is not limited thereto. The first sub-antenna rings 241a and second sub-antenna rings 241b may be made of the same material, but the invention is not limited thereto.

[0306] Flexible circuit board 27 can be connected to pads 243a, 243b, 243c, and 243d. Flexible circuit board 27 can be a flexible printed circuit board (FPCB) or a chip-on-film (COF) film. Since the coil driver 263 is mounted on flexible circuit board 27, flexible circuit board 27 will be described below as a chip-on-film (COF) film.

[0307] The flexible circuit board 27 can be electrically connected to pads 243a, 243b, 243c, and 243d. For example, multiple pads (not shown) on the flexible circuit board 27 connected to multiple signal transmission lines 271a and 271b and connecting lines 272 can be connected to pads 243a, 243b, 243c, and 243d via connector 26. Connector 26 can be a ZIF connector (zero insertion force connector), a BTB connector (board-to-board connector), etc., but the invention is not limited thereto. A socket is formed on window 22 of connector 26, and the pads (not shown) and pads 243a, 243b, 243c, and 243d can be electrically connected to each other by inserting the flexible circuit board 27 into the socket of connector 26.

[0308] As another example, the pads (not shown) of the flexible circuit board 27 can be soldered to pads 243a, 243b, 243c, and 243d. For example, the pads (not shown) on the flexible circuit board 27 that connect to signal transmission wires 271a and 271b and to connecting wire 272 can be connected to pads 243a, 243b, 243c, and 243d via external lead soldering (OLB) and anisotropic conductive film (ACF).

[0309] In addition, various connection methods can be used to electrically and physically connect the pads (not shown) to pads 243a, 243b, 243c and 243d.

[0310] The flexible circuit board 27 includes multiple signal transmission wires 271a and 271b located on a first surface of the flexible circuit board and connecting wires 272 located on a second surface of the flexible circuit board. The wires 271a, 271b, and 272 can be printed by photolithography, thin film sputtering, or the like. The methods for positioning the wires 271a, 271b, and 272 on the flexible circuit board 27 are not limited to the methods described above. Furthermore, although it has been described above that the signal transmission wires 271a and 271b and the connecting wires 272 are located on opposite surfaces of a substrate, they can also be located on different substrates, and the invention is not limited thereto.

[0311] Signal transmission wire 271a connects to pad 243a of the first sub-antenna ring 241a and to coil driver 263, and signal transmission wire 271b connects to pad 243d of the second sub-antenna ring 241b and to coil driver 263.

[0312] Connecting wire 272 connects pad 243b, which is connected to the first sub-antenna ring 241a, to pad 243c, which is connected to the second sub-antenna ring 241b. That is, the first sub-antenna ring 241a and the second sub-antenna ring 241b are electrically connected to each other via connecting wire 272 located on the flexible circuit board 27. Therefore, the current introduced from the coil driver 263 to the pad 243a via the signal transmission wire 271a flows in the following order: first sub-antenna ring 241a, pad 243b, connecting wire 272, pad 243c, second sub-antenna ring 241b, pad 243d, and signal transmission wire 271b.

[0313] In other words, the antenna module according to this embodiment has essentially the same effect as an antenna loop formed in a spiral pattern, without the need to form spiral patterned 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 decreasing the thickness and size of the touchscreen 20.

[0314] Figure 21 and Figure 22 A partial view showing an antenna module according to a fifth embodiment and an electronic device including the antenna module is shown.

[0315] like Figure 21 and Figure 22 As shown, the loop coil 264 includes antenna loops 241a and 241b located below the display panel 251, and ferrite sheet 25 located below the display panel 251.

[0316] Figure 22 It shows along Figure 21 The cross-sectional view taken by line D-D'. For example... Figure 22As shown, antenna rings 241a and 241b can be printed on the display panel 251 by methods such as photolithography or thin film sputtering. The method of positioning antenna rings 241a and 241b on the display panel 251 is not limited to the above methods.

[0317] Sub-antenna rings 241a and 241b are spaced apart from each other on one surface of the display panel 251 and do not directly contact each other. A first end of the first sub-antenna ring 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 the second sub-antenna ring 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 can be formed on one surface of the display panel 251.

[0318] Each of the sub-antenna rings 241a and 241b can be a conductive line extending along the boundary of the display area DP. Although each of the sub-antenna rings 241a and 241b is shown as having an overall rectangular shape, they can have shapes such as circular, elliptical, polygonal, or polygonal with rounded corners, but the invention is not limited thereto.

[0319] Furthermore, the first sub-antenna ring 241a is located outside the second sub-antenna ring 241b. The first sub-antenna ring 241a may extend along the periphery of the second sub-antenna ring 241b. The shortest distance between adjacent first sub-antenna rings 241a and second sub-antenna rings 241b may be the same on one surface of the display panel 251, but the invention is not limited thereto. The first sub-antenna rings 241a and second sub-antenna rings 241b may be wires with the same width, but the invention is not limited thereto. The first sub-antenna rings 241a and second sub-antenna rings 241b may be made of the same material, but the invention is not limited thereto.

[0320] The flexible circuit board 27 can be connected to 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) film. Since the coil driver 263 is mounted on the flexible circuit board 27, the flexible circuit board 27 will be described below as a chip-on-film (COF) film.

[0321] The flexible circuit board 27 can be electrically connected to pads 243a, 243b, 243c, and 243d. For example, multiple pads (not shown) on the flexible circuit board 27 connected to multiple signal transmission wires 271a and 271b and connecting wires 272 can be connected to pads 243a, 243b, 243c, and 243d via connector 26. Connector 26 can be a ZIF connector (zero insertion force connector), a BTB connector (board-to-board connector), etc., but the invention is not limited thereto. A socket for connector 26 is formed on the display panel 251, and the pads (not shown) and pads 243a, 243b, 243c, and 243d can be electrically connected to each other by inserting the flexible circuit board 27 into the socket of connector 26.

[0322] As another example, the pads (not shown) of the flexible circuit board 27 can be soldered to pads 243a, 243b, 243c, and 243d. For example, the pads (not shown) on the flexible circuit board 27 that connect to signal transmission wires 271a and 271b and to connecting wire 272 can be connected to pads 243a, 243b, 243c, and 243d via external lead soldering (OLB) and anisotropic conductive film (ACF).

[0323] In addition, various connection methods can be used to electrically and physically connect the pads (not shown) to pads 243a, 243b, 243c and 243d.

[0324] The flexible circuit board 27 includes multiple signal transmission wires 271a and 271b located on a first surface of the flexible circuit board and connecting wires 272 located on a second surface of the flexible circuit board. The wires 271a, 271b, and 272 can be printed by photolithography, thin film sputtering, or the like. The methods for positioning the wires 271a, 271b, and 272 on the flexible circuit board 27 are not limited to the methods described above. Furthermore, although it has been described above that the signal transmission wires 271a and 271b and the connecting wires 272 are located on opposite surfaces of a substrate, they can also be located on different substrates, and the invention is not limited thereto.

[0325] Signal transmission wire 271a connects to pad 243a of the first sub-antenna ring 241a and to coil driver 263, and signal transmission wire 271b connects to pad 243d of the second sub-antenna ring 241b and to coil driver 263.

[0326] Connecting wire 272 connects pad 243b, which is connected to the first sub-antenna ring 241a, to pad 243c, which is connected to the second sub-antenna ring 241b. That is, the first sub-antenna ring 241a and the second sub-antenna ring 241b are electrically connected to each other via connecting wire 272 located on the flexible circuit board 27. Therefore, the current introduced from the coil driver 263 to the pad 243a via the signal transmission wire 271a flows in the following order: first sub-antenna ring 241a, pad 243b, connecting wire 272, pad 243c, second sub-antenna ring 241b, pad 243d, and signal transmission wire 271b.

[0327] In other words, the antenna module according to this embodiment has essentially the same effect as an antenna loop formed in a spiral pattern, without the need to form spiral patterned 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 decreasing the thickness and size of the touch screen 20.

[0328] The following describes an electronic device and its driving method when the electronic device according to the embodiments is implemented as a foldable device.

[0329] Figure 23 The diagram shows a stylus and a portable electronic device.

[0330] The foldable electronic device 2 may include Figure 2 The constituent elements of the electronic device.

[0331] like Figure 23 As shown, in a component such as a rectangular foldable electronic device 2 or a touch screen 20 included therein, in a plan view, the long side located on the left is referred to as the first long side LS1, the long side located on the right is referred to as the second long side LS2, the short side located on the upper side is referred to as the first short side SS1, and the short side located on the lower side is referred to as the second short side SS2.

[0332] The foldable electronic device 2 can be bent along a predetermined folding direction based on the 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.

[0333] Next, we will refer to Figure 24 and Figure 25 This describes the use of a conventional stylus (e.g., an EMR-type pen) in a foldable electronic device.

[0334] Figure 24 and Figure 25 This illustrates the use of a stylus on a foldable electronic device using conventional methods.

[0335] The foldable electronic device described herein may have Figure 24 The flat or unfolded state shown Figure 25 The diagram shows the folded state and the intermediate state between the unfolded and folded states. Here, unless otherwise explicitly stated, the term "folded state" refers to the "fully folded state".

[0336] like Figure 24 As shown, in the case of an electromagnetic resonant type stylus in a passive stylus, the digital converter 33 sends an electromagnetic signal B1 to the EMR type stylus 30 and then receives a resonant signal B2 from the EMR type stylus 30.

[0337] The digital converter 33 can be attached below the display panel 251 and may include a flexible printed circuit board (FPCB) 34 on which multiple conductive antenna rings are formed and a ferrite sheet 35 that blocks the magnetic field generated by the antenna rings.

[0338] In FPCB 34, multiple antenna loops for detecting the location of the input resonant signal are configured to comprise multiple layers. One antenna loop has a shape that overlaps with at least one other antenna loop in the Z-axis direction. Therefore, FPCB 34 is relatively thick.

[0339] like Figure 25 As shown, when the foldable electronic device 2 is folded based on the folding axis AXIS_F, the FPCB 34 attached to the folded area (hereinafter referred to as the folded area) FA will deform. Repeated folding will apply stress to the wiring components forming the antenna loop, which may damage the wiring components. In the folded state, at least a portion of the folded area FA can be formed by a curved surface with a predetermined curvature.

[0340] The ferrite sheet 35 blocks the influence of the magnetic field generated by the antenna ring on the interior of the foldable electronic device 2. The ferrite sheet 35 is also relatively thick, making it prone to deformation when folding the foldable electronic device 2, and it may be damaged due to repeated folding.

[0341] Therefore, it is difficult to apply the EMR-type stylus 30 to the foldable electronic device 2. Furthermore, in the case of the EMR type, since signals are transmitted and received only through the digital converter 33, signal transmission B1 and signal reception B2 cannot be performed simultaneously, thus creating the problem that signal transmission and signal reception must be performed in a time-division manner.

[0342] Figure 26 and Figure 27 A foldable electronic device according to one embodiment is shown.

[0343] The touchscreen 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.

[0344] The touch sensor 261 may include a substrate 23, a touch electrode layer 21 above the substrate 23, and a window 22 above the touch electrode layer 21.

[0345] The substrate 23 may be the encapsulation substrate of the display panel 251 or the color filter substrate of the display panel 251, and the substrate is preferably made of a transparent material.

[0346] 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. Although the touch electrode layer 21 in... Figure 26 The first touch electrode and the second touch electrode are shown as a single layer, but they can be located on different layers, or they can be positioned to overlap each other, or they can be positioned not to overlap each other, or a separate layer can be set between them.

[0347] Window 22 may be located on touch electrode layer 21. Touch electrode layer 21, conductive tip 11, and window 22 can generate capacitance. Therefore, signals generated by stylus 10 (resonant signals or active touch signals) can be transmitted to touch electrode layer 21 through capacitance.

[0348] The loop coil 264 may include a substrate 24 and a ferrite sheet 25, with the antenna loop located on the substrate 24. (See reference...) Figures 28 to 33 As described, in addition to the substrate 24, the antenna ring may also be located on the same layer as the touch electrode layer 21, and the antenna ring may also be located below the window 22. In this case, the substrate 24 may not be included in the ring coil 264.

[0349] The substrate 24 can be attached to the rear surface of the display panel 251. The substrate 24 can be located on the rear surface of the display panel 251 in the area including the folding region FA. The substrate 24 can be a single-sided FPCB, a double-sided FPCB, or a multi-layer FPCB, but is preferably a single-sided or double-sided FPCB. Therefore, even when the folding region FA is bent relative to the folding axis AXIS_F, the risk of damage to the substrate 24 due to the force applied to it is reduced.

[0350] The substrate 24 may include a flexible base film. The base film may be made of polyimide resin, epoxy resin, or another known material that is flexible. At least one antenna loop, which is formed to include at least one wire, may be formed on the base film.

[0351] The antenna ring is formed as a conductive line on the substrate 24. For example, the antenna ring can be printed on the substrate 24 by photolithography, thin film sputtering, or the like. The method for positioning the antenna ring on the substrate 24 is not limited to the methods described above.

[0352] The ferrite sheet 25 can be located in a region on the XY plane other than the folding region FA. Here, the region excluding the folding region FA refers to a region where the forces acting on the ferrite sheet 25 will not damage it when the foldable electronic device 2 is in the folded state, rather than meaning that the ferrite sheet 25 is not located at all within the folding region FA. For example, even if the ferrite sheet 25 is located within a portion of the folding region FA, it can still correspond to a region excluding the folding region FA if the ferrite sheet 25 is not damaged when the foldable electronic device 2 repeatedly deforms between the folded and unfolded states. Therefore, even when the folding region FA is bent relative to the folding axis AXIS_F, the risk of damage to the ferrite sheet 25 is reduced.

[0353] After the loop coil 264 transmits the electromagnetic signal B1 to the stylus 10, the touch sensor 261 receives the resonant signal E1 from the stylus 10.

[0354] The resonant circuit 12 of the stylus 10 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 mutual inductance. Alternatively, the resonant circuit 12 can resonate with the magnetic field generated by the loop coil 264. This references... Figures 6 to 11 The description.

[0355] Figures 28 to 33 A view showing the arrangement of a touch panel and a ring coil according to various aspects of one embodiment is presented.

[0356] like Figure 28 As shown in (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 ring 241.

[0357] 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 shapes such as circular, elliptical, polygonal, or polygonal with rounded corners, but the invention is not limited thereto. Furthermore, 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 region where the ferrite sheet 25 is located on the XY plane.

[0358] The ferrite sheet 25 may include a first sheet 25a located between the folded region FA and the long side LS1, and a second sheet 25b located between the folded region FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include multiple sheets, and even in this case, the ferrite sheet 25 is still located in the area on the rear surface of the display panel 251 other than the folded region FA.

[0359] like Figure 29 As shown in (a), the antenna ring 241 can be directly printed onto the substrate of the display panel 251 by methods such as photolithography or thin-film sputtering. The methods for directly forming the antenna ring 241 onto the substrate of the display panel 251 are not limited to the methods described above.

[0360] like Figure 29 As shown in (b), the ferrite sheet 25 may include a first sheet 25a located between the folded region FA and the long side LS1, and a second sheet 25b located between the folded region FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include multiple sheets, and even in this case, the ferrite sheet 25 is still located in the area on the rear surface of the display panel 251 other than the folded region FA.

[0361] Antenna ring 241 may be a conductive line extending along the boundary of display area DP. Although antenna ring 241 is shown as having an overall rectangular shape, it may have shapes such as circular, elliptical, polygonal, or polygonal with rounded corners, but the invention is not limited thereto. Furthermore, antenna ring 241 may be formed of a conductive material with high transmittance and low impedance, such as ITO, graphene, silver nanowires, etc. Antenna ring 241 may overlap with the region where ferrite sheet 25 is located in the XY plane.

[0362] Next, Figure 30 An annular coil 264, including an antenna ring 241, is shown in the case of an on-cell type touch sensor. The antenna ring 241 is located on the same layer as the touch electrode layer 21. Figure 31 A ring coil 264 including an antenna ring 241 is shown in the case of an in-cell type touch sensor, which is located on the same layer as the touch electrode layer 21.

[0363] The antenna ring 241 may be made of the same material as the first and second touch electrodes of the touch electrode layer 21. However, the antenna ring 241 may be located in a different layer from the touch electrode layer 21 and may be made of a different material than the first and second touch electrodes.

[0364] like Figure 30 (a) and Figure 31As shown in (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.

[0365] 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 encapsulation substrate 23 of the display panel 251.

[0366] Antenna loop 241 can be a conductive line extending along the boundary of display area DP. Antenna loop 241 can overlap with the area where ferrite sheet 25 is located on the XY plane.

[0367] The ferrite sheet 25 may include a first sheet 25a located between the folded region FA and the long side LS1, and a second sheet 25b located between the folded region FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include multiple sheets, and even in this case, the ferrite sheet 25 is still located in the area on the rear surface of the display panel 251 other than the folded region FA.

[0368] like Figure 31 As shown in (b), the display panel 251 includes a touch electrode layer 21 and a ring coil 264. That is, the substrate 23 can be the color filter substrate of the display panel 251, and the touch electrode layer 21 and the antenna ring 241 can 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 ring 241 can both be located at the upper and lower parts of the color filter substrate 23.

[0369] Antenna loop 241 can be a conductive line extending along the boundary of display area DP. Antenna loop 241 can overlap with the area where ferrite sheet 25 is located on the XY plane.

[0370] The ferrite sheet 25 may include a first sheet 25a located between the folded region FA and the long side LS1, and a second sheet 25b located between the folded region FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include multiple sheets, and even in this case, the ferrite sheet 25 is still located in the area on the rear surface of the display panel 251 other than the folded region FA.

[0371] exist Figures 28 to 31 Although the antenna ring 241 is shown as having a shape extending along the boundary of the display area DP inside the display area DP, the antenna ring 241 may also be located outside the display area DP. Furthermore, the antenna ring 241 may be positioned such that it does not overlap with the touch electrodes located on the touch electrode layer 21 in the XY plane, and surrounds the periphery of the area where the touch electrodes are located.

[0372] like Figure 32As shown in (a), the antenna ring 241 can be printed on the window 22 by methods such as photolithography or thin film sputtering, or the antenna ring 241 can be printed on the sheet to be attached to the window 22 by methods such as photolithography or thin film sputtering. The method of positioning the antenna ring 241 on the window 22 is not limited to the above methods.

[0373] The ferrite sheet 25 includes a first sheet 25a, a second sheet 25b, a third sheet 25c, and a third sheet 25d. The first sheet 25a is attached to the rear surface of the display panel 251 and is located in the region between the folded region 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 region between the folded region 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. The third sheet 25d is located below the antenna ring 241 attached to the window 22 and is located at the long side LS2.

[0374] like Figure 33 As shown in (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 rings 241a and 241b.

[0375] like Figure 33 As shown in (b), the ferrite sheet 25 may include a first sheet 25a located between the folded region FA and the long side LS1, and a second sheet 25b located between the folded region FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include multiple sheets, and even in this case, the ferrite sheet 25 is still located in the area on the rear surface of the display panel 251 other than the folded region FA.

[0376] Antenna loop 241a can be a conductive line extending along the boundary between the display area DP and the folded area FA at the long side LS1, and antenna loop 241b can be a conductive line extending along the boundary between the display area DP and the folded area FA at the long side LS2. Antenna loop 241a can overlap with the area where the first piece 25a is located in the XY plane, and antenna loop 241b can overlap with the area where the second piece 25b is located in the XY plane.

[0377] Next, we will refer to Figure 34 and Figure 35 A method for driving a touch module 260 including an antenna module according to the present invention is described.

[0378] Figure 34 A portion of a touch module according to one embodiment is shown schematically.

[0379] A 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 sending signals to and receiving signals from the touch sensor 261, and a controller 2624.

[0380] 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 along the second direction, and the second touch electrodes 121-1 to 121-n may have a shape extending along the first direction. In 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.

[0381] The first driver / receiver 2620 can apply a drive signal to the first touch electrodes 111-1 to 111-m. The second driver / receiver 2622 can apply a drive signal to the second touch electrodes 121-1 to 121-n.

[0382] The first driver / receiver 2620 can receive sensing signals from the first touch electrodes 111-1 to 111-m. The second driver / receiver 2622 can receive sensing signals from the second touch electrodes 121-1 to 121-n.

[0383] Although the implementation of touch sensor 261 using the mutual capacitance method has been described above, touch sensor 261 can also be implemented using the self-capacitance method, and those skilled in the art can readily and 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, adding new components or omitting some components and modifying them to adapt to the self-capacitance method.

[0384] 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 dotted manner, or as described above, they may be arranged in a shape that extends in one direction.

[0385] The coil driver 263 applies a drive signal to the toroidal coil 264. This drive signal may include a signal with a frequency corresponding to the resonant frequency of the resonant circuit 12 (e.g., a sine wave, square wave, etc.), and may be an AC voltage or AC current with a predetermined frequency. The frequency and amplitude of the drive signal can be changed under the control of the controller 2624.

[0386] The controller 2624 can receive sensor input from the stylus 10 by demodulating touch signals 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, thereby changing the frequency of the resonant signal of the stylus 10. 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 performed 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 performed in the same manner as OOK and ASK.

[0387] Reference Figure 35 Describe the driving signal.

[0388] Figure 35 The driving signal of the loop coil and the resonant signal of the stylus are shown according to one embodiment.

[0389] like Figure 35 As shown, the coil driver 263 can apply a drive signal D_264 to the loop coil 264. The drive signal D_264 can be an AC current with a predetermined frequency (i.e., the frequency corresponding to the resonant frequency of the resonant circuit 12 of the stylus 10), which oscillates between a first level IH and a second level IL, but the invention is not limited thereto. The resonant circuit 12 then resonates through the magnetic field generated in the loop coil 264 by the drive signal D_264. The signal generated by the resonance of the resonant circuit 12 is transmitted to the touch sensor 261 through the capacitance generated by the touch sensor 261, so that the touch electrodes 111 and 121 can receive the sensing signal from the stylus 10.

[0390] Next, we will refer to Figure 36 to 47 A foldable electronic device and a driving method according to various embodiments of the present invention are described.

[0391] Figure 36 and Figure 37 A foldable electronic device according to another embodiment is shown.

[0392] With reference Figure 24 and Figure 25The foldable electronic device described is identical to the one described above, except that the substrate 24 is located in the region on the XY plane other than the folding region FA, so its description will be omitted.

[0393] Reference Figure 36 The loop coil 264 may include a substrate 24 and a ferrite sheet 25, with the antenna loop located on the substrate 24. (See reference...) Figures 38 to 41 As described, in addition to the substrate 24, the antenna ring may also be located on the same layer as the touch electrode layer 21, and in this case, the substrate 24 may not be included in the ring coil 264.

[0394] The loop coil 264 can be located in a region on the XY plane other than the folded region FA. The loop coil 264 can include at least two sub-loop coils 24a and 24b. Sub-loop coil 24a can be located in the region between the folded region FA and the long side LS1, and sub-loop coil 24b can be located in the region between the folded region FA and the long side LS2. Drive signals with the same or similar phase can be applied to these two sub-loop coils 24a and 24b, drive signals with opposite phases can be applied to these two sub-loop coils 24a and 24b, or these two sub-loop coils 24a and 24b can be selectively driven.

[0395] Therefore, even when the folded region FA is bent relative to the folding axis AXIS_F, the risk of damage to the loop coil 264 is further reduced.

[0396] Figures 38 to 41 A view showing the arrangement of the touch panel and the ring coil according to various aspects of another embodiment is shown.

[0397] like Figure 38 As shown in (a), the ring coil 264 is located below the display panel 251. The ring coil 264 includes multiple sub-ring coils 24a and 24b and a ferrite sheet 25.

[0398] Sub-loop coil 24a includes a base film 242a and an antenna ring 241a, and sub-loop coil 24b includes a base film 242b and an antenna ring 241b. Sub-loop coil 24a can be located in the region between the folded region FA and the long side LS1, and sub-loop coil 24b can be located in the region between the folded region FA and the long side LS2. Figure 38 The base films 242a and 242b can be FPCB or rigid PCB.

[0399] like Figure 38As shown in (b), the ferrite sheet 25 may include a first sheet 25a located between the folded region FA and the long side LS1, and a second sheet 25b located between the folded region FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include multiple sheets, and even in this case, the ferrite sheet 25 is still located in the area on the rear surface of the display panel 251 other than the folded region FA.

[0400] The antenna loop 241a of the sub-loop coil 24a can be a conductive line extending along the boundary between the display area DP and the folded area FA at the long side LS1, and the antenna loop 241b of the sub-loop coil 24b can be a conductive line extending along the boundary between the display area DP and the folded area FA at the long side LS2. The antenna loop 241a can overlap with the area where the first piece 25a is located in the XY plane, and the antenna loop 241b can overlap with the area where the second piece 25b is located in the XY plane.

[0401] like Figure 39 As shown in (a), the antenna rings 241a and 241b can be directly printed on the substrate of the display panel 251 by methods such as photolithography or thin-film sputtering. The methods for directly forming the antenna rings 241a and 241b on the substrate of the display panel 251 are not limited to the methods described above.

[0402] like Figure 39 As shown in (b), the ferrite sheet 25 may include a first sheet 25a located between the folded region FA and the long side LS1, and a second sheet 25b located between the folded region FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include multiple sheets, and even in this case, the ferrite sheet 25 is still located in the area on the rear surface of the display panel 251 other than the folded region FA.

[0403] Antenna loop 241a can be a conductive line extending along the boundary between the display area DP and the folded area FA at the long side LS1, and antenna loop 241b can be a conductive line extending along the boundary between the display area DP and the folded area FA at the long side LS2. Antenna loop 241a can overlap with the area where the first piece 25a is located in the XY plane, and antenna loop 241b can overlap with the area where the second piece 25b is located in the XY plane.

[0404] Next, Figure 40 An annular coil 264, including an antenna ring 241, is shown in the case of an on-cell type touch sensor. The antenna ring 241 is located on the same layer as the touch electrode layer 21. Figure 41 A ring coil 264 including an antenna ring 241 is shown in the case of an in-cell type touch sensor, which is located on the same layer as the touch electrode layer 21.

[0405] The antenna ring 241 may be made of the same material as the first and second touch electrodes of the touch electrode layer 21. However, the antenna ring 241 may be located in a different layer from the touch electrode layer 21 and may be made of a different material than the first and second touch electrodes.

[0406] like Figure 40 (a) and Figure 41 As shown in (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.

[0407] 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 encapsulation substrate 23 of the display panel 251.

[0408] Antenna loop 241a can be a conductive line extending along the boundary between the display area DP and the folded area FA at the long side LS1, and antenna loop 241b can be a conductive line extending along the boundary between the display area DP and the folded area FA at the long side LS2. Antenna loop 241a can overlap with the area where the first piece 25a is located in the XY plane, and antenna loop 241b can overlap with the area where the second piece 25b is located in the XY plane.

[0409] The ferrite sheet 25 may include a first sheet 25a located between the folded region FA and the long side LS1, and a second sheet 25b located between the folded region FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include multiple sheets, and even in this case, the ferrite sheet 25 is still located in the area on the rear surface of the display panel 251 other than the folded region FA.

[0410] like Figure 41 As shown in (b), the display panel 251 includes a touch electrode layer 21 and a ring coil 264. That is, the substrate 23 can be the color filter substrate of the display panel 251, and the touch electrode layer 21 and the antenna ring 241 can 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 ring 241 can both be located at the upper and lower parts of the color filter substrate 23.

[0411] Antenna loop 241a can be a conductive line extending along the boundary between the display area DP and the folded area FA at the long side LS1, and antenna loop 241b can be a conductive line extending along the boundary between the display area DP and the folded area FA at the long side LS2. Antenna loop 241a can overlap with the area where the first piece 25a is located in the XY plane, and antenna loop 241b can overlap with the area where the second piece 25b is located in the XY plane.

[0412] The ferrite sheet 25 may include a first sheet 25a located between the folded region FA and the long side LS1, and a second sheet 25b located between the folded region FA and the long side LS2. In addition to these two sheets, the ferrite sheet 25 may also include multiple sheets, and even in this case, the ferrite sheet 25 is still located in the area on the rear surface of the display panel 251 other than the folded region FA.

[0413] exist Figures 38 to 40 Although antenna rings 241a and 241b are shown extending along the boundary between the display area DP and the folded area FA, antenna rings 241a and 241b may also be located outside the display area DP. Furthermore, antenna ring 241 may be positioned such that it does not overlap with the touch electrodes located on the touch electrode layer 21 in the XY plane, and surrounds the periphery of the area where the touch electrodes are located.

[0414] In the following text, reference will be made to Figures 42 to 47 describe Figure 33 and Figures 38 to 41 The operation of the touch panel and the loop coil.

[0415] Figure 42 A portion of a touch module according to one embodiment is shown schematically.

[0416] With reference Figure 34 The foldable electronic device described is identical to the one described above, except that the loop coils 264a and 264b are located in regions other than the folding region FA, so its description will be omitted.

[0417] Toroidal coil 264a is located to the left of the folded axis AXIS_F, and toroidal coil 264b is located to the right of the folded axis AXIS_F. Toroidal coils 264a and 264b are connected to coil driver 263.

[0418] Coil driver 263 applies a drive signal to each of the toroidal coils 264a and 264b. Coil driver 263 can apply drive signals differently depending on the position of the stylus 10 on the touchscreen 20. Next, reference will be made to... Figures 43 to 47 To describe this.

[0419] Figure 43 The illustration shows various positions in which a stylus is positioned near a foldable electronic device according to another embodiment, and... Figure 44 The driving signal of the loop coil and the resonant signal of the stylus are shown according to the position of the stylus.

[0420] like Figure 43As shown in (a) and (c), when the stylus 10 is located in the region covered by the loop coil in the XY plane (i.e., the region between the folded region FA and the long side LS1 or the region between the folded region FA and the long side LS2), the coil driver 263 can cause the resonant 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), when the stylus 10 is located in the region not covered by the loop coil on the XY plane (i.e., the folded region FA), when the drive signal is 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 receiving sensitivity of the touch input detected by the touch sensor 261 can be reduced.

[0421] Therefore, as Figure 44 As shown, when the stylus 10 is located in an area of ​​the XY plane not covered by the loop coil, i.e., during segment (b), the coil driver 263 applies a drive signal of the same or similar phase to both antenna loops 241a and 241b. Here, the position of the stylus 10 can be determined by the touch controller 262, and when the touch controller 262 enters the area of ​​the stylus 10 in the XY plane not covered by the loop coil, the coil driver 263 can be controlled so that a drive signal such as the signal of segment (b) can be applied to each of the antenna loops 241a and 241b.

[0422] Figures 45 to 47 This schematically illustrates when applied Figure 44 The magnetic field generated when the driving signal is applied.

[0423] Figure 45 It shows that when applying such Figure 44 The magnetic field Ba is generated when the signal in segment (a) is driven by the signal. Since the magnetic field Ba is mainly generated by the current I_264a flowing through the loop coil 264a in the region covered by the loop coil 264a in the XY plane, the resonant circuit 12 of the stylus 10 can resonate.

[0424] Figure 46 It shows that when applying such Figure 44 The magnetic fields Ba, Bb, and Bc are generated not only by the current I_264a flowing through the loop coil 264a and the current I_264b flowing through the loop coil 264b in the region covered by the loop coils 264a and 264b in the XY plane, but also by the magnetic field Bb in the region not covered by the loop coils 264a and 264b in the XY plane. Therefore, the resonant circuit 12 of the stylus 10 can resonate.

[0425] Figure 47 It shows that when applying such Figure 44 The magnetic field Bc is generated when the signal in segment (c) is driven by the signal. Since the magnetic field Bc is mainly generated by the current I_264b flowing through the loop coil 264b in the region covered by the loop coil 264b in the XY plane, the resonant circuit 12 of the stylus 10 can resonate.

[0426] Next, we will refer to Figure 48 and Figure 49 Describe the area within the touch sensor that has low receiving sensitivity.

[0427] Figure 48 and Figure 49 Each shows the arrangement of the touch panel and the ring coil.

[0428] like Figure 48 As shown, touch electrodes 111 and 121 in the touch sensor are connected to traces 112 and 122 in the peripheral region located at the edge of the touch area. First touch electrodes 111-1, 111-2, 111-3, ... are connected to the corresponding traces 112, and second touch electrodes 121-1, 121-2, 121-3, ... are connected to the corresponding traces 122.

[0429] The first touch electrodes 111-1, 111-2, 111-3, ... are longer than the second touch electrodes 121-1, 121-2, 121-3, ..., and RC delay may occur, so that trace 112 can be connected to the first and second ends of the first touch electrodes 111-1, 111-2, 111-3, ...

[0430] like Figure 49 As shown, when the current of the drive signal DS flows through the antenna loop 241, the magnetic field generated in the central region A1 of the touch sensor is different from the magnetic fields generated in the corner regions C1, C2, C3 and C4 of the touch sensor.

[0431] In the central region A1 of the touch sensor, the current flowing through the antenna ring 241 is in the same direction ( Figure 12A magnetic field is generated along 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 region A1, the direction of the magnetic field (-Z-axis) is perpendicular to the winding direction of the coil, resulting in a larger amount of energy being transmitted to the resonant circuit 12. In contrast, in the corner regions 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 regions 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 region A1.

[0432] Therefore, the amplitude of the signal output from the stylus 10 located in the corner regions C1, C2, C3 and C4 of the touch sensor may decrease, or the signal output may stop.

[0433] Therefore, an antenna module is needed to enhance the magnetic energy transmitted to the stylus 10 located in the corner regions C1, C2, C3 and C4 of the touch sensor.

[0434] 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 invention is not limited thereto.

[0435] Furthermore, the antenna ring 241 is located on the base film 242. The antenna ring 241 can be printed on the base film 242 by photolithography, thin film sputtering, or the like. Alternatively, the antenna ring 241 can be printed on the window 22 by photolithography, thin film deposition, or the like. Furthermore, the sheet on which the antenna ring 241 is formed can be attached to the window 22. Furthermore, the antenna ring 241 can be located on the same layer as the touch electrode layer 21. In this case, the antenna ring 241 can be made of the same material as the touch electrodes of the touch electrode layer 21. However, the antenna ring 241 can be located on a different layer than the touch electrode layer 21 and can be made of a different material than the touch electrodes. Furthermore, although shown as... Figure 13 The device has one antenna loop 241, but may have two or more antenna loops 241, and the method for positioning the antenna loops 241 on the touch screen 20 is not limited to the method described above.

[0436] When a touch object (e.g., a human body) touches the peripheral area of ​​the touch sensor, a capacitance Cc is generated between the conductive antenna ring 241 and the touch object. In addition, a capacitance Ct is generated between the touch object and traces 112 and 122, and a capacitance Ce is also generated between the touch object and touch electrodes 111 and 121 located in the touch electrode layer 21.

[0437] When the drive signal DS is applied to the antenna loop 241, the drive signal DS affects the traces 112 and 122 and the touch electrodes 111 and 121 through electrical coupling Cc, Ct and Ce.

[0438] For example, while the drive signal DS is applied to the antenna loop 241, noise can be generated by the drive signal DS transmitted to the touch electrodes 111 and 121 via the touch object when the touch electrodes 111 and 121 receive sensing signals from the stylus 10. Furthermore, while the drive signal DS is applied to the antenna loop 241, noise can be generated by the drive signal DS transmitted to the touch controller 262 via the traces 112 and 122 via the traces 112 and 122 when the sensing signals received by the touch electrodes 111 and 121 are transmitted to the touch controller 262 via the touch object.

[0439] Furthermore, even when the object being touched is not in use, the antenna loop 241, touch electrodes 111 and 121, and traces 112 and 122 still electrically influence each other. For example, touch electrodes 111 and 121 and traces 112 and 122 can form direct capacitive coupling with the antenna loop 241. Therefore, when a voltage of a predetermined frequency is applied to the loop coil 264, noise can be generated by the sensing signals sensed through touch electrodes 111 and 121 or by the sensing signals transmitted to the touch controller 262 through traces 112 and 122.

[0440] Furthermore, when current flows in the antenna ring 241, a magnetic field (Mc) is generated, and this magnetic field can ultimately induce currents (e.g., eddy currents) in the touch electrodes 111 and 121 and the traces 112 and 122. Therefore, noise can be generated by electromagnetic induction from the sensing signals sensed through the touch electrodes 111 and 121 or the sensing signals transmitted to the touch controller 262 through the traces 112 and 122.

[0441] In particular, in the case where the touch electrode 112 and the touch electrode 111 extend in the same direction, the noise generated due to electromagnetic coupling may be greater. (Refer to...) Figure 14 Describe this.

[0442] Figure 50 Showing more details Figure 48 The arrangement of the touch panel and the loop coil.

[0443] 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.

[0444] In this situation, greater noise may be generated between the adjacent and interconnected traces and the touch electrodes.

[0445] like Figure 50 As shown, touch electrode 111-1 extending in the Y-axis direction and trace 112-1 extending in the Y-axis direction are connected to each other. 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 within the maximum width in the X-axis direction of touch electrode 111-1 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 the drive signal DS applied to antenna loop 241.

[0446] In other words, 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 touch electrode 111-1 with the maximum width in the X-axis direction.

[0447] However, even when the object being touched is in region P2, the touch electrodes 111-2, ..., 111-15 and 111-16 can be affected by the drive signal DS applied to the antenna loop 241, but the effect of the drive signal DS applied to the antenna loop 241 is smaller when the traces 112-2, ..., 112-15 and 112-16 are connected to each other but not adjacent to each other.

[0448] Furthermore, when a touch object is near touch traces 112-1, ..., 112-15, and 112-28, touch electrodes 121-1, ..., and 121-28 can be affected by the drive signal DS applied to antenna loop 241, but the affected area is smaller than that of touch electrodes 111-1, ..., and 111-16. When a touch object is near touch electrodes 121-1, ..., and 121-28, touch electrodes 121-1, ..., and 121-28 can be affected by the drive signal DS applied to antenna loop 241, but the influence of the drive signal DS on traces 112-1, ..., 112-15, and 112-28 is relatively small.

[0449] In other words, the noise generated between traces that are connected and adjacent to each other and arranged in the same or similar directions and touch electrodes can be greater than the noise generated between traces that are connected and arranged in the same or similar directions but not adjacent to each other and touch electrodes, as well as between traces that are connected and adjacent to each other but not arranged in the same or similar directions and touch electrodes.

[0450] The inventors have confirmed that, when traces extending along the Y-axis and touch electrodes are connected to each other and positioned adjacent to each other, the noise caused by the antenna loop driving is greater than the standard touch signal used for touch electrodes when the length of the antenna loop extending along the Y-axis and overlapping the touch electrodes within the maximum width of the touch electrodes in the X-axis direction is greater than twice the length of the touch electrodes in the Y-axis direction.

[0451] Therefore, it is necessary to design antenna modules that can reduce this noise.

[0452] Figures 51 to 55 A view showing the arrangement of a touch panel and a ring coil according to various aspects of one embodiment is presented.

[0453] Assumption Figures 51 to 55 The arrangement of the touch electrodes 111 and 121 and the traces 112 and 122 in the middle Figure 48 and Figure 50 The touch sensor shown is the same. Antenna ring 241 is shown with solid or dashed lines to indicate that antenna ring 241 can be located on different layers.

[0454] exist Figures 51 to 55In this context, the portion of the antenna loop 241 extending in the Y-axis direction and overlapping with the touch electrode 111-1 within its maximum width in the X-axis direction (as part of region P1 in which the trace 112-1 extending in the Y-axis direction of the antenna loop 241 and the touch electrode 111-1 are connected and positioned adjacent to each other) is less than twice the length of the touch electrode 111-1 in the Y-axis direction. That is, the density of the antenna loop 241 in region P1 is less than the density of the antenna loop 241 in region P2. Here, the density is assumed to be the overlap length of the touch electrode and the antenna loop 241 extending in the same direction on the XY plane.

[0455] Reference Figure 51 and Figure 52 The length of the antenna loop 241 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 one time the length of the touch electrode 111-1 in the Y-axis direction. Since the antenna loop 241 is wound, the first winding of the antenna loop 241 located in region P1 and the second winding of the antenna loop 241 adjacent to region P1 can be located on touch electrodes in different Y-axis directions.

[0456] like Figure 51 As shown, the spacing (spacing in the X-axis direction) between the first and second windings of the antenna ring 241 can be substantially equal to the minimum spacing between the second and third windings of the antenna ring 241.

[0457] like Figure 52 As shown, the spacing between the first and second windings of antenna ring 241 can be greater than the minimum spacing between the second and third windings of antenna ring 241. The spacing between the first and second windings of antenna ring 241 can be substantially equal to the minimum spacing between the third and fourth windings of antenna ring 241.

[0458] Reference Figure 53 and Figure 54 The length of the antenna ring 241 extending in the Y-axis direction and overlapping the touch electrode 111-1 extending in the Y-axis direction is less than twice the length of the touch electrode 111-1 in the Y-axis direction.

[0459] like Figure 53 As shown, the antenna loop 241 may include a first portion extending in the Y-axis direction and a repeating portion along the Y-axis direction. The second part of the shaped pattern. In this case, a portion of the second part can be located in region P1. That is, a portion of the second part can overlap with the touch electrode 111-1 extending in the Y-axis direction.

[0460] like Figure 54 As shown, the antenna loop 241 can have a symmetrically positioned structure comprising a first part and a second part, wherein the first part extends in the Y-axis direction, and the second part repeats along the Y-axis direction. A shaped pattern. In this case, a portion of the second part can be located in region P1. That is, a portion of the second part can overlap with the touch electrode 111-1 extending in the Y-axis direction.

[0461] Reference Figure 55 Multiple antenna rings 241a and 241b can be positioned. The sum of the Y-axis length of antenna ring 241a, which extends in the Y-axis direction and overlaps with touch electrode 111-1, which also extends in the Y-axis direction, and the Y-axis length of antenna ring 241b, which extends in the Y-axis direction and overlaps with touch electrode 111-1, is equal to or less than 1 times the Y-axis length of touch electrode 111-1.

[0462] The drive signal can be applied to each of the antenna rings 241a and 241b independently. Therefore, when only the drive signal is applied to the antenna ring 241a or the antenna ring 241b, the effect on the touch electrode 111-1 and the trace 112-1 can be further reduced.

[0463] Reference Figure 56 The noise reduction effect is described when using the antenna loop 241 according to an embodiment of the present invention.

[0464] Figure 56 A graph comparing touch signals and noise signals is shown, based on an example and a comparison example.

[0465] The Y-axis represents the amplitude of the signal sensed by each touch electrode, and the X-axis represents the sequence number of the touch electrode. It will be described as the first electrode being touch electrode 111-1, and the 16th electrode being touch electrode 111-16.

[0466] The description will be as follows Figure 50 Signals 2010 and 2012 are detected in the structure of the antenna loop 241 shown. Since the difference between the noise signal 2010 detected by the touch electrodes 111-2, ..., 111-16 and the touch signal 2012 is greater than or equal to a threshold, the touch controller 262 can detect the touch signal 2012 as a touch input. However, in the case of the first electrode 111-1, since the amplitude of the touch signal 2012 is less than the amplitude of the noise signal 2020, the touch controller 262 cannot detect the touch signal 2012 as a touch input.

[0467] The description will be as follows Figures 51 to 55Signals 2020 and 2022 are detected in the structure of the antenna loop 241 shown. 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.

[0468] Next, we will refer to Figures 57 to 59 An antenna module is described that can enhance the magnetic energy transmitted to the stylus 10 located in the corner regions C1, C2, C3 and C4 of the touch sensor.

[0469] Figures 57 to 60 A view showing the arrangement of the touch panel and the ring coil according to various aspects of another embodiment is shown.

[0470] exist Figure 57 and Figure 58 In the antenna ring 241, the number of windings in the corner regions C1, C2, C3 and C4 is greater than the number of windings in other regions.

[0471] like Figure 57 As shown, the antenna loop 241 can be wound twice in adjacent corner regions C1 and C2 and adjacent corner regions C3 and C4, as shown. Figure 58 As shown, the antenna loop 241 can be wound twice in each of the corner regions C1, C2, C3 and C4.

[0472] In addition, such as Figure 58 As shown, after wrapping in each of the corner regions C1, C2, C3 and C4, a wrapping can also be performed in the center region.

[0473] The magnetic energy transmitted to the stylus 10 located in the corner regions C1, C2, C3 and C4 can be increased by increasing the number of windings in the corner regions C1, C2, C3 and C4 as described above.

[0474] Reference Figure 59 The corner pattern 241x can be located in the corner regions C1, C2, C3, and C4 to generate magnetic fields in the vertex directions P1, P2, P3, and P4 of the corner regions C1, C2, C3, and C4. The corner pattern 241x has a pattern that repeats in a zigzag pattern in each of the corner regions C1, C2, C3, and C4.

[0475] Reference Figure 60 When the base film 242 is a double-sided PCB, the corner pattern 241x can be alternately located on opposite surfaces of the base film 242. When the base film 242 is a multilayer PCB, the corner pattern 241x can be located on multiple layers of the base film 242. This will enable the solenoid to function as the corner pattern 241x.

[0476] The solenoid implemented as corner pattern 241x can generate a magnetic field in the vertex direction or in a combination of the vertex direction and the Z-axis direction. Therefore, the antenna loop 241 can enhance or even transmit magnetic energy to the stylus 10 tilted in the vertex direction in the corner regions C1, C2, C3 and C4.

[0477] According to these implementation methods, the following advantages are available: the sensitivity of touch input reception can be improved and the touch position can be calculated more accurately.

[0478] According to these implementations, the following advantages are available: the energy transmitted to the stylus in the corner region of the antenna ring can be increased.

[0479] Next, we will refer to Figure 61 and Figure 62 This describes an example of a stylus and electronic device transmitting and receiving signals according to one embodiment.

[0480] Figure 61 and Figure 62 Each shows a schematic circuit diagram of a stylus and an electronic device.

[0481] Figure 61 The resonant circuit 12 can be represented as an equivalent circuit including resistor Rp, inductor Lp and capacitor Cp, or an equivalent circuit including resistor Rs, inductor Ls and capacitor Cs.

[0482] like Figure 61 and Figure 62 As shown, when the loop coil and the internal capacitor resonate through the power supply 40 that transmits the drive signal, the resonant circuit 12 of the stylus 10 can also resonate with the loop coil and the internal capacitor.

[0483] Figure 61 The following situation is shown: the loop coil Ldp and the internal capacitor Cdp are connected in parallel, and the resistor Rp, inductor Lp and capacitor Cp of the resonant circuit 12 are connected in parallel.

[0484] Figure 62 The following situation is shown: the loop coil Ldp and the internal capacitor Cdp are connected in parallel, and the resistor Rs, inductor Ls and capacitor Cs of the resonant circuit 12 are connected in series.

[0485] exist Figure 61 and Figure 62 In the case where the blocking capacitor Cb is not connected in series with the resonant circuit 42, the magnetic field generated by the driving signal is as follows.

[0486] [Equation 1]

[0487]

[0488] The change in the magnetic field generated by the resonant circuit 42 produces the induced electromotive force shown in Equation 2 below.

[0489] [Equation 2]

[0490]

[0491] For Equation 1, when an electric field induces a magnetic field, both alternating current and direct current contribute to the induced magnetic field. However, for Equation 2, when a magnetic field induces an electric field, only the time-varying magnetic field induces the electric field. Therefore, although the current J, as a DC component, in Equation 1 does not contribute to the induced electromotive force of the resonant circuit 12, this current J still consumes electricity.

[0492] Therefore, the DC component current can be prevented from flowing through the resonant circuit 42 by connecting the blocking capacitor Cb in series with the resonant circuit 42, as shown in Equation 3 below.

[0493] [Equation 3]

[0494]

[0495] Therefore, the power consumption of the resonant circuit 42 can be reduced.

[0496] Next, we will refer to Figure 63 An example is described of an electronic device 2 according to one embodiment, including a ring coil 264 and a coil driver 263.

[0497] Figure 63 An antenna module and a stylus are shown according to one embodiment.

[0498] Reference Figure 63 The ring coil 264 located on the side of the touch sensor 261 and the capacitor Cdp form a resonant circuit. This resonant circuit is connected in series with the blocking capacitor Cb.

[0499] The stylus's resonant circuit 12 can resonate by receiving energy from the loop coil 264 as energy from a magnetic field generated by a drive signal of a predetermined frequency applied by the power supply 40. The stylus can then use this resonant energy to transmit a touch input signal to the touch sensor 261. For example, Figure 3 The stylus 10a in (a) 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 10c of (c), the active stylus module 60 can generate a signal by using the power generated by the resonant signal in the resonant circuit 12, and can send the signal to the touch sensor 261.

[0500] Next, we will refer to Figure 64 and Figure 65 Describes the amplitude variation of a resonant signal based on a magnetic field increased by applying a driving signal.

[0501] Figure 64 The diagram shows the drive signal applied to the loop coil by the coil driver and the resonant signal of the stylus. Figure 65 The diagram illustrates a drive signal applied to a loop coil by a coil driver and a resonant signal from a stylus, according to one embodiment.

[0502] like Figure 64 As shown, the coil driver 263 can apply a drive signal to each of the two ends of the loop coil 264. The second end of the loop coil 264 is grounded, and the drive signal (i.e., a voltage with a predetermined frequency) is applied to the first end of the loop coil 264. Because voltages of different amplitudes (voltage difference between the two ends = (Vb - Va)) are applied to the two ends of the loop coil 264, a current Id flows in the loop coil 264. The current intensity changes according to the voltage change, but the current direction remains unchanged. As shown in Equation 1 above, the change in current (current intensity) generates a magnetic field around the loop coil 264.

[0503] As shown in Equation 2, the change in the magnetic field induces an electromotive force in the resonant circuit 12.

[0504] The peak-to-peak (PP) voltage of the resonant signal generated by the induced electromotive force in the resonant circuit 12 is V0.

[0505] Reference Figure 65 A drive signal with opposite phase is applied to both ends of the loop coil 264. In this case, the PP voltage of the drive signal is Vb-Va, which is related to... Figure 64 The PP voltage of the drive signal applied to the loop coil 264 is the same. Because voltages of different amplitudes (voltage difference between the two ends = 2*(Vb-Va)) are applied to the two ends of the loop coil 264, current Id flows in the loop coil 264. As the voltage changes, the current intensity and direction also change.

[0506] As shown in Equation 1 above, the change in current (current intensity) generates a magnetic field around the loop coil 264. As shown in Equation 2, the change in the magnetic field induces an electromotive force in the resonant circuit 12. The voltage PP of the resonant signal generated by the induced electromotive force in the resonant circuit 12 is V1 (V1>V0).

[0507] A strong alternating current generates a large magnetic field change, which in turn induces a large electromotive force. According to the electronic device control method of the present invention, by simultaneously applying drive signals of opposite phases to both ends of the loop coil 264, even using the same voltage, the magnetic field generated in the coil is amplified.

[0508] In other words, 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 by the coil driver 263 without increasing the PP voltage.

[0509] Next, the following will be described: the coil driver 263 includes a blocking capacitor Cb, and an applied capacitor is used in the coil driver 263. Figure 65 The method of driving signals.

[0510] Figure 66 Specifically shown Figure 65 Coil driver.

[0511] Reference Figure 66 The toroidal coil Ldp is connected in parallel with the internal capacitor Cdp. The first electrode of the blocking capacitor Cb1 is connected to the first electrode of the internal capacitor Cdp, and the first electrode of the blocking capacitor Cb2 is connected to the second electrode of the internal capacitor Cdp.

[0512] Drive signals with different phases (e.g., opposite phases) are applied to the second electrodes of blocking capacitors Cb1 and Cb2, respectively. For example, the phase of the drive signal applied to the second electrode of blocking capacitor Cb1 is opposite to the phase of the drive signal applied to the second electrode of blocking capacitor Cb2.

[0513] For reference Figure 65 As described, by simultaneously applying driving signals of opposite phases to both ends of the loop coil 264, the magnetic field generated in the coil is amplified even when using the same voltage.

[0514] In addition, the DC component current can be prevented from flowing through the resonant circuit 42 by connecting the blocking capacitors Cb1 and Cb2 to the resonant circuit 42, as shown in Equation 3 above.

[0515] Based on 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, with the following effect: the power required to use the stylus can be transmitted while using the stylus without the need for separate wireless charging.

[0516] Figures 67 to 69 Each shows the arrangement of the touch sensor and the loop coil.

[0517] like Figure 67 As shown, the loop coil 264 can be positioned around the periphery of the touch sensor 261 without overlapping with it. The current I with an AC waveform is used as the drive signal. D Apply to the loop coil 264.

[0518] like Figure 68 As shown, the loop coil 264 can be located in the area overlapping with the touch sensor 261. The current I with an AC waveform will be used as the drive signal. D Apply to the loop coil 264.

[0519] like Figure 69 As shown, the ring coil 264 may include multiple sub-ring coils 2640, 2641, 2642, and 2643. The sub-ring coils 2640, 2641, 2642, and 2643 may be located in the area overlapping with the touch sensor 261, but the invention is not limited thereto. The current I, each having an AC waveform, is used as the drive signal. D0 I D1 I D2 and I D3 The application was applied to sub-loop coils 2640, 2641, 2642 and 2643 respectively.

[0520] Figures 70 to 74 Each shows the state of the stylus approaching the electronic device.

[0521] like Figures 70 to 74 As shown, the stylus 10 and the touchscreen 20 can be close to each other.

[0522] Figures 70 to 74 The stylus 10 can generate touch input (resonance signal or active touch signal) by resonating with the drive signal applied to the touch electrode layer 21.

[0523] Figures 70 to 74 The touchscreen 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.

[0524] The substrate 23 can be the encapsulation substrate of the display panel 251, which can be made of a transparent material.

[0525] The touch electrodes of the touch electrode layer 21 may include: a plurality of first touch electrodes, each having a shape extending in a first direction and arranged in a second direction intersecting the first direction; and a plurality of second touch electrodes, each having a shape extending in the second direction and arranged in the first direction. Although the touch electrodes of the touch electrode layer 21 are shown as a single layer in the figures, the first touch electrodes and the second touch electrodes may be located on different layers, but the present invention is not limited thereto.

[0526] Window 22 can be located on the touch electrode of touch electrode layer 21. The touch electrode of touch electrode layer 21, conductive tip 11, and window 22 can form a capacitor Cx. Therefore, the signal (resonant signal or active touch signal) generated by stylus 10 can be transmitted to the touch electrode of touch electrode layer 21.

[0527] 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.

[0528] like Figure 71 , Figure 72 and Figure 73 As shown, the loop coil 264 can be located in an area that does not overlap with the touch sensor 261.

[0529] Reference Figure 71 The loop coil 264 can be printed on the window 22 by methods such as photolithography or thin film sputtering, or the loop coil 264 can be printed on a sheet and attached to the window 22 by methods such as photolithography or thin film sputtering. The method of positioning the loop coil 264 on the window 22 is not limited to the above methods.

[0530] Figure 72 The arrangement of the loop coil 264 in the case of an on-cell type touch sensor is shown. The loop coil 264 is located on the same layer as the touch electrode layer 21. Figure 73 The arrangement of the loop coil 264 in the case of an in-cell type touch sensor is shown, which is located on the same layer as the touch electrode layer 21.

[0531] Reference Figure 72 and Figure 73The ring coil 264 can be located in the same layer as the touch electrode layer of the touch electrode layer 21. The ring coil 264 can be made of the same material as the touch electrode layer 21. However, the ring coil 264 can be located in a different layer than the touch electrode layer of the touch electrode layer 21, and can be made of a different material.

[0532] exist Figure 72 In the process, the ring coil 264 and the touch electrode of the touch electrode layer 21 are located in the touch electrode on the encapsulation substrate 23 of the display panel 251.

[0533] exist Figure 73 In this display panel 251, touch electrodes of touch electrode layer 21 and a ring coil 264 are included. That is, substrate 23 can be a color filter substrate of display panel 251, and the touch electrodes of touch electrode layer 21 and ring coil 264 can be located between color filter substrate 23 and TFT substrate of display panel 251. Alternatively, the touch electrodes of touch electrode layer 21 and ring coil 264 can both be located at the upper and lower parts of color filter substrate 23.

[0534] like Figure 74 and Figure 75 As shown, the loop coil 264 can be located in the area overlapping with the touch sensor 261. The loop coil 264 can be directly printed on the substrate of the display panel 251 by methods such as photolithography or thin film sputtering, or it can be printed on a sheet and attached to the substrate of the display panel 251 by methods such as photolithography or thin film sputtering. The method for positioning the loop coil 264 on the substrate of the display panel 251 is not limited to the methods described above.

[0535] like Figure 74 As shown, the loop coil 264 can be located only near the housing of the touch sensor 261, or as... Figure 75 As shown, the loop coil 264 can be positioned to correspond to the entire area of ​​the touch sensor 261.

[0536] Furthermore, the ring coil 264 can be located in a different layer than the touch electrode layer 21. However, as Figure 71 and Figure 72 As shown, the loop coil 264 can be located on the same layer as the touch electrode of the touch electrode layer 21 in the area overlapping with the touch sensor 261, and can be made of the same material.

[0537] Figure 75 and Figure 76 Each shows the state of a stylus approaching an electronic device to send and receive signals.

[0538] like Figure 75As shown, when a drive signal is applied to the loop coil 264, the resonant circuit 12 resonates through the magnetic field B generated therefrom.

[0539] Then, as Figure 76 As shown, the signal RS from the stylus 10 can be transmitted directly from the conductive tip 11 to the touch electrode of the touch electrode layer 21, or it can be transmitted to the touch electrode of the touch electrode layer 21 through air or a non-conductive housing.

[0540] Figure 77 The specific display is shown. Figure 3 stylus and Figure 2 A schematic diagram of an electronic device.

[0541] 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 main body portion 19b spaced apart from the tip 11.

[0542] The capacitor section 113 may include multiple capacitors connected in parallel. These capacitors may have different capacitances and may be adjusted during the manufacturing process.

[0543] The inductor section 114 includes a ferrite core 115 and a coil 116 wound around the ferrite core 115.

[0544] The capacitor section 113 and the inductor section 114 are connected in parallel, and a resonant signal is generated in response to the LC resonance of the capacitor section 113 and the inductor section 114 through the driving signal.

[0545] Figure 78 The specific display is shown. Figure 77 A schematic diagram of the inductor section of a stylus.

[0546] Reference Figure 78 The inductor section 114 includes a ferrite core 115 and a coil 116 wound around the ferrite core 115.

[0547] In this case, the inductance of the inductor section 114 is determined by the following equation 4.

[0548] [Equation 4]

[0549]

[0550] As can be seen from Equation 4, the inductance is directly proportional to the permeability of the ferrite core 115, the cross-sectional area of ​​the coil 116, and the square of the number of turns, and inversely proportional to the winding length of the coil 116.

[0551] The design of the inductor section 114 is very important in the resonant circuit 12 housed in the stylus.

[0552] Figure 79 The inductance and Q values ​​are shown as they vary with frequency.

[0553] like Figure 79 As shown, in the design of the inductor section 114, the inductance L and Q value are very important parameters. Here, the Q value is a quantity representing the coil characteristics as an element of the resonant circuit, and is expressed by the equation... The values ​​are given. Furthermore, L and R represent the inductance and resistance of the coil, respectively, and f represents the frequency. A higher Q value results in a sharper resonance characteristic.

[0554] In stylus design, L can have a self-resonant frequency that is large enough relative to the frequency to be used, and Q can have its maximum value at the frequency to be used. To achieve this, the ferrite core material, the type of wire in the coil, and the winding scheme need to be optimized. A method is also needed to obtain a high output signal while maintaining a fine pen diameter.

[0555] The following embodiments will describe a method for designing a stylus that optimizes various ferrite core materials, coil wire types, and winding schemes.

[0556] (1) Ferrite core material

[0557] In one example, manganese (Mn) and nickel (Ni) were used as ferrite core materials.

[0558] (2) Wire type

[0559] In the example, enameled wire and stranded wire are used as the wire types for the coils used.

[0560] Figure 80 and Figure 81 Enameled wire and stranded wire are shown respectively.

[0561] like Figure 80 As shown, the enameled wire 100 is a wire made by coating the surface of a copper wire 101 with an insulating enamel 102 and heating it to a high temperature, and is used for winding and wiring to electronic equipment, communication equipment, and electronic instruments. In the 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.

[0562] like Figure 81 As shown, the stranded wire 200 is a special insulated wire made by twisting together multiple strands of fine insulated wire 100 (e.g., enameled wire) with a diameter of about 0.1 mm into a single wire and coating it with an insulating coating 201 made of nylon or the like. The stranded wire 200 can reduce the skin effect by increasing the surface area and is used in coils for high-frequency circuits, etc.

[0563] In the example, a stranded wire with 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.

[0564] (3) Winding scheme

[0565] In examples of this invention, a multi-layer winding structure is used to obtain sufficient inductance (i.e., a sufficient number of turns) within the limited space of the stylus. Specifically, as Figure 82 As shown in (A) and (B), two multi-layer winding schemes are used.

[0566] Figure 82 A multi-layer winding scheme is shown.

[0567] Figure 82 The winding scheme (A) is the simplest, being a continuous layer winding scheme, in which the upper layer is wound after the lower layer, which is immediately below it, has been wound. In this case... Figure 82 Scheme (A) is such that the winding of one layer begins at the position where the winding of the previous layer immediately below it ends, and is referred to below as the U-shaped winding scheme.

[0568] Figure 82 The winding scheme of (B) is an alternating layer winding scheme, in which adjacent winding layers are wound alternately, such that the windings of adjacent layers are wound in a zigzag pattern. This is referred to below as the zigzag winding scheme. This zigzag winding scheme minimizes the voltage difference between adjacent winding layers, thereby reducing the winding self-capacitance. In this case, the winding self-capacitance (a type of parasitic capacitance) is a parameter representing the electric field energy stored in the winding.

[0569] Comparative Experiment 1 (Comparison of the property values ​​of each material)

[0570] The ferrite core material is changed to manganese, nickel and magnesium, and the Q value is measured with enameled wire used as the coil wire type and wound in a U-shaped winding scheme.

[0571] As a result of the measurements, the differences in Q-value characteristics between each core material are small, and the measured Q-values ​​are insufficient to be implemented in a product.

[0572] Comparative Experiment 2 (Comparison of characteristic values ​​for each type of winding)

[0573] With the ferrite core wound with manganese (Mn) in a U-shaped winding pattern, the Q values ​​of inductors 1 and 2, manufactured using enameled wire and stranded wire, were measured respectively.

[0574] Figures 83 to 85 A graph showing the results of the comparative experiment is presented.

[0575] Figure 83 The Q values ​​of inductors 1 and 2 are shown, measured at varying frequencies using an E4980A precision inductance-capacitance-resistance (LCR) meter manufactured by KEYSIGHT TECHNOLOGIES.

[0576] exist Figure 83 In the diagram, 'a' represents the 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 the waveform showing the change in Q value relative to the frequency of inductor 2 (manganese core / stranded wire / U-shaped winding scheme).

[0577] In inductor 2, which is made of stranded wire, the Q value is almost at its maximum at a frequency of about 400 kHz (frequency f1), and in inductor 1, which is made of enameled wire, the Q value is almost at its maximum at a frequency of about 150 kHz (frequency f2).

[0578] 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 stranded wire is superior to enameled wire for the coil of the inductor forming the resonant circuit of the stylus.

[0579] However, the maximum Q value of inductor 2 measured in comparative experiment 2 was the target value Q required for commercial use. target About half of it.

[0580] Comparative Experiment 3 (Comparison of characteristic values ​​for each winding scheme)

[0581] The Q value was measured for inductors 3 to 5 manufactured with the ferrite core made of manganese (Mn), by changing the wire type to enameled wire and stranded wire and changing the winding pattern to U-shaped and zigzag.

[0582] Figure 84 The Q values ​​of inductors 3 to 5 are shown, measured at varying frequencies using an E4980A precision LCR meter manufactured by KEYSIGHT TECHNOLOGIES.

[0583] exist Figure 84 In the diagram, 'a' represents the waveform showing the change in Q value relative to the frequency of inductor 3 (manganese core / enameled wire / U-shaped winding scheme), 'b' represents the waveform showing the change in Q value relative to the frequency of inductor 4 (manganese core / enameled wire / zigzag winding scheme), and 'c' represents the waveform showing the change in Q value relative to the frequency of inductor 5 (manganese core / stranded wire / zigzag winding scheme).

[0584] from Figure 84As can be seen from waveform c, in inductor 5, manufactured using a stranded wire / zigzag winding scheme, the Q value almost reaches its maximum at a frequency of approximately 300 kHz (frequency f3). In inductor 4, manufactured using an enameled wire / zigzag winding scheme, and inductor 3, manufactured using an enameled wire / U-shaped winding scheme, the Q value almost reaches its maximum at a frequency of approximately 150 kHz (frequency f2).

[0585] 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 approximately 1.5 times higher than that of inductor 4 and 2 times or more higher than that of inductor 3. Therefore, it can be seen that the zigzag winding scheme is superior to the U-shaped winding scheme for the inductor forming the resonant circuit of the stylus.

[0586] However, the maximum Q value of inductor 5 (manganese core / stranded wire / zigzag winding scheme) measured in Comparative Experiment 2 was the target value Q required for commercial use. target Approximately 3 / 4.

[0587] Comparative Experiment 4 (Comparison of the property values ​​of each core material)

[0588] In the example, manganese and nickel are used as ferrite core materials, with nickel typically having a permeability of 200 to 300 and manganese typically having a permeability of 3000 to 5000.

[0589] Since the permeability of manganese used in the example is about 15 times higher than that of nickel (assuming the coils have the same cross-sectional area and length), the number of turns in manganese is reduced to about a quarter of that in nickel to achieve the same inductance value. Therefore, from the perspective of turns alone, it can be seen that using manganese is more efficient than nickel.

[0590] On the other hand, since the inductor section 114 has a complex structure including a coil wound around the core, parasitic capacitance is also generated. As the Q value decreases due to parasitic capacitance, the amplitude of the resonant signal may be reduced.

[0591] The parasitic capacitance generated in the inductor section 114 can occur between the wound coils and between the core and the coil. As mentioned above, the parasitic capacitance between the wound coils can be reduced by adopting a zigzag winding scheme.

[0592] Meanwhile, in the example, core materials with a lower capacitance than manganese were tested to reduce the parasitic capacitance between the core and the coil. The test results confirmed that nickel core is the best material for ferrite core.

[0593] One important physical property of manganese and nickel, the main ferrite core elements, is their permeability, which has a significant impact on the inductance value as shown in Equation 4. However, permittivity is an insignificant physical property in manganese and nickel as ferrite elements; in fact, information on nickel is not available in the datasheets provided by manufacturers.

[0594] In this example, the permittivity of manganese and nickel was measured using the KEYSIGHT TECHNOLOGIES E4980A precision LCR meter to determine the permittivity of manganese and nickel. The measurement results are shown in Table 1 below.

[0595] [Table 1]

[0596] Permeability of manganese The permittivity of nickel Measurement 1 2400 - Measurement 2 8300 2

[0597] Measurements 1 and 2 were performed using the same E4980A precision LCR meter from KEYSIGHT TECHNOLOGIES, where Measurement 1 represents the capacitance calculated automatically by the measurement software. According to Measurement 1, although the capacitance of manganese was 2400, the capacitance of nickel was not measured. Measurement 2, calculated by measuring capacitance, area, and distance between ferrite cores, yielded a capacitance of 8300 for manganese and 2 for nickel. A significant difference exists between the capacitance results of Measurement 1 and Measurement 2; in the case of Measurement 2, it is confirmed that the error based on capacitance, area, distance, etc., is considerable. However, the results of Measurements 1 and 2 show that the capacitance of nickel is 1 / 1000 or less of the capacitance of manganese.

[0598] In comparative experiment 4, Q values ​​were measured for inductors 6 and 7, which were manufactured by changing the winding type to U-shape and zigzag, with the ferrite core made of nickel and stranded wire as the wire type.

[0599] Figure 85 The Q values ​​of inductors 6 and 7 are shown, measured at varying frequencies using an E4980A precision LCR meter manufactured by KEYSIGHT TECHNOLOGIES.

[0600] exist Figure 85 In the diagram, 'a' represents the waveform showing the change in Q value relative to the frequency of inductor 6 (nickel core / stranded wire / U-shaped winding scheme), and 'b' represents the waveform showing the change in Q value relative to the frequency of inductor 7 (nickel core / stranded wire / zigzag winding scheme).

[0601] from Figure 85Waveform b shows that in inductor 7, manufactured using a nickel-core / stranded wire / zigzag winding scheme, the Q value almost reaches its maximum at a frequency of approximately 400 kHz (frequency f5). In inductor 6, manufactured using a nickel-core / stranded wire / U-shaped winding scheme, the Q value almost reaches its maximum at a frequency of approximately 200 kHz (frequency f6). For comparison... Figure 85 From the results of a and b, it can be seen that the maximum Q value of inductor 7 is about twice as high as the maximum Q value of inductor 6.

[0602] The maximum Q value of inductor 7 (nickel core / stranded wire / zigzag winding scheme) measured in comparative experiment 4 almost reached the target value Q required for commercial use. target .

[0603] In the comparative experiments 1 to 4 above, inductors were manufactured and their Q values ​​were tested by changing the ferrite core material, the type of wire in 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 using a nickel core winding, stranded wire, and a zigzag winding scheme. Furthermore, it can be seen that the maximum Q value of the inductor manufactured using this combination reached the commercially viable target value of Q. target .

[0604] Meanwhile, in this embodiment, a wire type in which a nickel core is used as a ferrite core and a stranded wire is used as the core can also achieve similar results when a material with a capacitance of 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 insulated wire is used instead of the stranded wire.

[0605] In this embodiment, as described below, in addition to using nickel, which has a lower permittivity than manganese, the method of increasing the distance between the core and the coil by setting a winding bobbin between the core and the coil can be used to further reduce the parasitic capacitance between the core and the coil.

[0606] Figure 86 Another example of an inductor section is shown.

[0607] Reference Figure 86The inductor section 114 includes a ferrite core 115, a winding spool 141 surrounding at least a portion of the ferrite core 115, and a coil 116 wound on at least a portion of the winding spool 141. The winding spool 141 can be secured by adhering it closely to the ferrite core 115 using the force generated by the winding of the coil 116. The winding spool 141 may include the same material as or a different material from the housing 19, and may include, for example, plastic or metal with an insulating surface. Specifically, polyphenylene sulfide (PPS), liquid crystal polyester fiber (LCP), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), phenolic resin, etc., can be used for the winding spool 141.

[0608] Therefore, when the bobbin 141 surrounds the ferrite core 115 and is wound by the coil 116, the distance between the ferrite core 115 and the coil 116 increases, making... Figure 86 The value of the parasitic capacitance Cp2 in the middle can be set to be greater than that in the middle. Figure 78 The parasitic capacitance Cp1 in the middle is small.

[0609] Figure 87 and Figure 88 A graph showing the amplitude of the resonant signal according to the structure of the inductor section is shown.

[0610] Reference Figure 87 When the inductor section 114 includes only the ferrite core 115 and the coil 116, the maximum amplitude of the measured resonant signal is approximately 2V (+1V to -1V). (Refer to...) Figure 88 When the inductor section 114 includes a ferrite core 115, a winding bobbin 141, and a coil 116, the maximum amplitude of the measured resonant signal is approximately 4V (+2V to -2V). That is, when at least a portion of the ferrite core 115 is surrounded in the winding bobbin 141 and the coil 116 is wound on the winding bobbin 141, the amplitude of the resonant signal is confirmed to be larger.

[0611] Furthermore, when using nickel as the ferrite core to design the optimal inductor section according to this embodiment, as mentioned above, the permeability of nickel is 1 / 15 of that of manganese. Therefore, in order to obtain the same inductance, the number of turns of nickel must be increased to approximately four times that of manganese. Consequently, in order to obtain the same inductance as manganese, the diameter of nickel must be larger than that of manganese.

[0612] In this embodiment, a method using multiple inductors is proposed to obtain a high output signal while reducing the diameter of the stylus.

[0613] Figure 89 and Figure 90 Other examples of resonant circuits are shown.

[0614] Figure 89The equivalent circuit is shown where two small-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 The diagram shows two inductors connected in series, but the implementation is not limited to this; three or more inductors can be connected in series. According to this LLC resonant circuit, since the inductance L is twice as large as that of a resonant circuit with one inductor and one capacitor (hereinafter referred to as an "LC resonant circuit"), the capacitance can be reduced by half. That is, the LLC resonant circuit can be manufactured to be thinner than the LC resonant circuit, but is more sensitive to effects on the capacitance.

[0615] at the same time, Figure 90 The equivalent circuit of two LC resonant circuits connected in series (hereinafter referred to as "LCLC resonant circuit") is shown, in which the two resonant signals are combined and output. Figure 90 The diagram shows two LC resonant circuits connected in series, but the implementation is not limited to this; three or more LC resonant circuits can be connected in series.

[0616] 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.

[0617] As mentioned above, although using nickel as the ferrite core results in an increase in the number of windings, when... Figure 89 and Figure 90 When using two or more inductors, a fine-diameter stylus can be manufactured by suppressing the increase in the diameter of the inductor section.

[0618] Then, as Figure 77 As shown, the signal RS from the stylus 10 can be transmitted directly from the conductive tip 11 to the touch electrode layer 21, or it can be transmitted to the touch electrode layer 21 through air or a non-conductive housing.

[0619] Even when the stylus 10 is hovering, the touch controller 262 can receive sensing signals via the resonant signal RS transmitted to the touch electrode layer 21. When the touch controller 262 generates touch data based on the sensing signals, it may generate touch data that is not expected by the user, or it may generate incorrect or unstable touch data.

[0620] Reference Figure 91 Describes touch input generated by transmitting the RS signal while hovering.

[0621] Figure 91 This demonstrates touch input generated by hovering the stylus.

[0622] For example, when writing, the stylus 10 can move on the touchscreen 20 from the end point A of the previous stroke to the start point C of the next stroke to write the previous stroke and then write the next stroke.

[0623] The conductive tip 11 of the stylus 10 contacts the window 22 at one point (first point) A and 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.

[0624] The stylus 10 is spaced apart from the window 22 in region B between the first point A and the second point C. That is, the stylus 10 hovers over region B. The signal RS0 from the conductive tip 11 of the hovering stylus 10 can be transmitted to the touch electrode layer 21. The signal RS1 generates touch data corresponding to the connecting stroke NL in region B. In other words, 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, which is not what the user expects, is generated and displayed on the touchscreen 20.

[0625] Several implementations provide styluses that prevent signal transmission from a hovering stylus.

[0626] On one hand, the user holds the stylus 10 and touches the touchscreen 20 using the conductive tip 11. This will refer to... Figures 92 to 94 Describe it.

[0627] Figure 92 The diagram illustrates the stylus and electronic device when held in hand. Figure 93 and Figure 94 Each shows a schematic circuit diagram of the stylus and electronic device when the stylus is held in hand.

[0628] exist Figure 92 In this process, the user holds the stylus 10 and makes the tip of the stylus 10 contact the touch screen 20 to input touch.

[0629] The stylus 10 can be held by the user's finger UF. At this time, the finger UF and the internal conductors of the stylus 10 (such as the conductors connecting the coil 116 of the stylus 10 and various components) can form parasitic capacitances Cf1 and Cf2.

[0630] Figure 93 and Figure 94 Each diagram shows an equivalent circuit illustrating the effect of the parasitic capacitance Cf generated by the user's hand. (Refer to...) Figure 93 and Figure 94The resonant frequency of the stylus 10 is altered by the parasitic capacitance Cf. Consequently, the frequency of the power supply 40 used to transmit the drive signal is inconsistent with the resonant frequency of the stylus 10, thus reducing the amplitude of the resonant signal of the stylus 10.

[0631] Reference Figure 95 This describes a stylus designed to prevent changes in its resonant frequency due to the user's grip.

[0632] Figure 95 A schematic diagram of a stylus is shown.

[0633] and Figure 92 Compared to the stylus 10, Figure 95 The stylus 10′ shown also includes a blocking member 17.

[0634] The blocking member 17 is a conductive member surrounding 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 parasitic capacitance. However, the blocking member 17 may generate eddy currents. This will be referred to... Figure 96 Describe it.

[0635] Figure 96 The display shows Figure 95 An example diagram of eddy currents generated in a stylus is shown.

[0636] like Figure 96 As shown in (a), current I1 flows in coil 116 through resonance. The current I1 flowing in coil 116 forms a magnetic field M1.

[0637] The magnetic field M1 generates a current I2 in a predetermined direction within the blocking member 17. The current I2 can be generated in a plane perpendicular to the direction of the magnetic field M1 generated by the inductor section 140. For example... Figure 96 As shown in (b), currents I2 are combined to generate clockwise eddy currents I3.

[0638] The eddy current I3 suppresses the magnetic field M1 generated in the coil 116. Then, the inductance of the inductor section 114 changes, and the resonant frequency of the stylus 10 changes according to the change in inductance.

[0639] Several implementations provide styluses that further prevent changes in resonant frequency caused by the user's grip and eddy currents.

[0640] Figures 97 to 105 A schematic diagram showing the structure of a stylus according to several embodiments is shown.

[0641] Figure 97 This illustrates a stylus that prevents resonant signal transmission during hovering. Figure 98This demonstrates a stylus that further prevents hovering and transmits resonant signals, as well as a stylus that exhibits resonant frequency variations due to eddy current generation. Figure 99 and Figure 100 The diagram illustrates the transmission of resonant signals in a stylus that further prevents hovering, as well as the stylus's resonant frequency variation due to user grip and eddy current generation. Figures 101 to 105 A stylus was shown that further prevents changes in resonant frequency due to user grip and eddy current generation.

[0642] Figures 97 to 105 The stylus 10 may include a conductive tip 110, a resonant circuit section, a blocking member 170, a grounding section 180, and a housing 190. For ease of description, although... Figures 97 to 100 Only the inductor section 140 of the resonant circuit section is shown, but the resonant circuit section may also include a capacitor section, and the capacitor section may be located inside the housing 190.

[0643] By reference Figures 97 to 105 All or part of the conductive tip 11 may be formed of a conductive material (e.g., metal), or the conductive tip 11 may have the following form: while the conductive tip 11 is present inside the non-conductive housing, a portion of it is exposed outside the non-conductive housing, but the invention is not limited thereto.

[0644] A capacitor section (not shown) and an inductor section 140 are located within a housing 190. The capacitor section (not shown) may include multiple capacitors connected in parallel. These capacitors may have different capacitances and may be adjusted during manufacturing. The inductor section 140 may be positioned spaced apart from the conductive tip 110 by a first distance d1.

[0645] The housing 190 can accommodate the components of the stylus 10. Since the interior of the housing 190 is hollow, it can accommodate the conductive tip 110, the resonant circuit section, and the ground section 180. The housing 190 can be made of a non-conductive material.

[0646] The housing 190 includes a handle portion 190a adjacent to the conductive tip 110 and a main body portion 190b spaced apart from the conductive tip 110. The handle portion 190a and the main body portion 190b may be integrally formed. Although the handle portion 190a and the main body portion 190b are shown as integrally connected, the handle portion 190a and the main body portion 190b may be separable.

[0647] Handheld unit 190a can be Figure 97 The angular form of (a) or Figure 97 (b) is a columnar form. Alternatively, the handle 190a may have a columnar shape. Figure 97The dome 192 of (c) is connected to the columnar shape. Alternatively, the handle 190a can be... Figure 97 The tubular form of (d).

[0648] The main body 190b may have a cylindrical shape, a polygonal shape, a column shape having at least a portion of a curved surface shape, a convex shape, a truncated pyramid shape, a truncated cone shape, etc., but the present invention is not limited thereto.

[0649] The blocking member 170a can be positioned corresponding to a portion of the housing in which the conductive tip 110 is exposed to the outside. For example, the blocking member 170a can be located within a range of 0 mm to 20 mm from the opening of the handle portion 190a in which the conductive tip 110 is exposed to the outside. Specifically, the blocking member 170a can be located between the opening of the handle portion 190a and a portion 20 mm from the opening of the handle 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 handle portion 190a and a portion 10 mm from the opening of the handle portion 190a, or it can be located between a portion at least 1 mm from the opening of the handle portion 190a and a portion 5 mm from the opening of the handle portion 190a. That is, the blocking member 170a can be located in an area adjacent to the portion of the housing in which the conductive tip 110 is exposed to the outside.

[0650] 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 grounding portion 180 via the conductive connection member 112. The blocking member 170a is electrically connected to the grounding portion 180 to be grounded.

[0651] The blocking member 170a can be located inside or outside the handheld part 190a. Although the conductive tip 110 is in Figure 97 The shielding member 170a is shown to be arranged inside the handheld portion 190a, but when the conductive tip 110 extends into the main body portion 190b, the shielding member 170a may also be arranged inside or outside the main body portion 190b.

[0652] Furthermore, depending on the position of the capacitor section and the inductor section 140, the blocking member 170a may surround at least a portion of the capacitor section and the inductor section 140. For example, when the capacitor section and the inductor section 140 are located inside the handheld portion 190a, the blocking member 170a may surround at least a portion of the capacitor section and the inductor section 140.

[0653] like Figure 97As shown, when the inductor portion 140 and the blocking member 170a are spaced apart by a predetermined distance greater than or equal to the predetermined distance, the blocking member 170a may be in the form of a conductive plate. Alternatively, the blocking member 170a may be a conductive coil inside the handle portion 190a. For example, the blocking member 170a may be a conductive coil wound while in contact with the interior of the handle portion 190a.

[0654] The blocking member 170a is spaced apart from the ferrite core of the inductor section 140 by a first distance d1 along the direction PD. Even when the blocking member 170a is not formed by multiple blocking units, the influence of the magnetic field generated by the ferrite core of the inductor section 140 is relatively small.

[0655] exist Figure 97 In (a), the blocking member 170a may have the form of surrounding at least a portion of the side surface of the handheld portion 190a having an angular shape. For example, the blocking member 170a may have the shape of surrounding only a portion of the side surface of the handheld portion 190a adjacent to the tip 110.

[0656] exist Figure 97 In (b), the blocking member 170a may have the form of surrounding at least a portion of the side surface of the handheld portion 190a having a columnar shape. For example, the blocking member 170a may have the shape of surrounding only a portion of the side surface of the handheld portion 190a adjacent to the tip 110.

[0657] exist Figure 97 In (c), the blocking member 170a may have at least a portion of the side surface of the cylindrical handle 190a and the outer surface of the dome 192. For example, the blocking member 170a may have a shape that only surrounds the portion of the side surface of the cylindrical handle 190a and the outer surface of the dome 192 adjacent to the tip 110.

[0658] exist Figure 97 In (d), the blocking member 170a may have the form of surrounding at least a portion of the inner surface of the tubular handheld portion 190a. For example, the blocking member 170a may have the shape of surrounding only a portion of the inner surface of the tubular handheld portion 190a adjacent to the tip 110.

[0659] like Figure 98 As shown, when the inductor portion 140 and the blocking member 170a are spaced apart by a 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 these blocking units 171a form a closed loop in the circumferential direction of the handheld portion 190a.

[0660] The first blocking units 171a 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 section 140, and are spaced apart from each other in the eddy current direction ED. The first blocking units 171a may be spaced apart from each other at a interval greater than or equal to 0.03 mm along the eddy current direction ED. Since the blocking member 170a includes the first blocking units 171a spaced apart from each other along the eddy current direction ED, no eddy current can flow along the blocking member 170a, thereby blocking the generation of eddy current. Although the first blocking units 171a have been described as extending in a direction perpendicular to the eddy current direction PD, the first blocking units 171a may extend in a direction inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD.

[0661] The first blocking units 171a are electrically connected to each other via connecting portions 174a. Furthermore, connecting portions 174a can be electrically connected to grounding portions 180. That is, the first blocking units 171a can be connected to grounding portions 180 via conductive connecting members 112. Blocking members 170a are electrically connected to the grounding portion 180 to be grounded.

[0662] exist Figure 98 In (a), the blocking member 170a may have the form of surrounding at least a portion of the side surface of the handheld portion 190a having an angular shape. For example, the blocking member 170a may have the shape of surrounding only a portion of the side surface of the handheld portion 190a adjacent to the tip 110.

[0663] exist Figure 98 In (b), the blocking member 170a may have the form of surrounding at least a portion of the side surface of the handheld portion 190a having a columnar shape. For example, the blocking member 170a may have the shape of surrounding only a portion of the side surface of the handheld portion 190a adjacent to the tip 110.

[0664] exist Figure 98 In (c), the blocking member 170a may have at least a portion of the side surface of the cylindrical handle 190a and the outer surface of the dome 192. For example, the blocking member 170a may have a shape that only surrounds the portion of the side surface of the cylindrical handle 190a and the outer surface of the dome 192 adjacent to the tip 110.

[0665] exist Figure 98 In (d), the blocking member 170a may have the form of surrounding at least a portion of the inner surface of the tubular handheld portion 190a. For example, the blocking member 170a may have the shape of surrounding only a portion of the inner surface of the tubular handheld portion 190a adjacent to the tip 110.

[0666] and Figure 97 Compared to the stylus 10 shown, Figure 99 The stylus 10 shown also includes a blocking member 170b. Figure 26 Compared to the stylus 10 shown, Figure 100 The stylus 10 shown 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 each other, and these blocking units 171b form a closed loop in the circumferential direction of the body portion 190b.

[0667] The blocking member 170b may be located inside or outside the main body 190b to surround at least a portion of the inductor portion 140. Although in Figure 99 The inductor section 140 is shown to be arranged inside the main body section 190b, but when the inductor section 140 extends into the handheld section 190a, the blocking member 170b may be located inside or outside the handheld section 190a.

[0668] The first blocking units 171b extend in the direction perpendicular to the eddy current PD, that is, in the direction parallel to the axial direction PD of the ferrite core in the inductor section 140, and are spaced apart from each other in the direction of the eddy current ED. Since the blocking member 170b includes the first blocking units 171b spaced apart from each other along the direction of the eddy current 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 the direction perpendicular to the eddy current PD, the first blocking units 171b can extend in a direction inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD.

[0669] The blocking members 170a and 170b can be electrically connected to each other. For example, the blocking member 170a and the first blocking unit 171b are electrically connected at the boundary between the handle portion 190a and the main body portion 190b. A plurality of first blocking units 171b are electrically connected to each other via a connecting portion 174b. The connecting portion 174b can be electrically connected to the grounding portion 180. That is, the first blocking unit 171b can be connected to the grounding portion 180 via a conductive connecting member 112. Both the blocking members 170a and 170b are electrically connected to the grounding portion 180 to be grounded.

[0670] Reference Figure 101 (a) The stylus 10 includes a conductive tip 110, a conductive connection member 120, a capacitor part 130, an inductor part 140, a blocking member 170, a grounding part 180, and a housing 190.

[0671] The blocking member 170 includes a conductive member surrounding the capacitor portion 130 and the inductor portion 140. The blocking member 170 can be connected to the ground portion 180.

[0672] Furthermore, the opposite ends of the blocking members 170 are spaced apart along the direction of the eddy current, ED. In this respect, Figure 101 (b) through (e) show the blocking member 170 in detail.

[0673] Reference Figure 101 (b) The blocking member 170 includes a slit GP for blocking the generation of eddy currents. The slit GP extends along a direction perpendicular to the eddy current PD. Opposite ends 1701 and 1702 of the blocking member 170 are spaced apart by the slit GP. In several embodiments, the slit GP may have a width greater than or equal to 0.03 mm along the eddy current direction ED.

[0674] Although the slit GP has been described as extending along the direction PD perpendicular to the eddy current, the slit GP can extend along a direction tilted at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD.

[0675] The opposing ends 1701 and 1702 of the blocking member 170 are spaced apart along the direction ED of the eddy current. Therefore, the generation of eddy current is interrupted because the eddy current cannot flow along the blocking member 170.

[0676] 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 of the eddy current ED. Similarly, since the blocking member 170 includes a plurality of first blocking portions 171 spaced apart from each other in the direction of the eddy current ED, no eddy current can flow along the blocking member 170, thereby blocking the generation of eddy currents. Although the first blocking portions 171 have been described as extending in a direction perpendicular to the eddy current PD, the first blocking portions 171 may extend in a direction inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD.

[0677] Reference Figure 101 (d) The blocking member 170 includes a plurality of second blocking portions 172. The plurality of second blocking portions 172 are spaced apart along a direction perpendicular to the eddy current PD, and the opposite ends of each second blocking portion 172 are spaced apart from each other along the direction of the eddy current ED. Similarly, since the opposite ends of each second blocking portion 172 included in the blocking member 170 are spaced apart along the direction of the eddy current ED, no eddy current can flow along the blocking member 170, thereby blocking the generation of eddy current.

[0678] 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 the direction perpendicular to the eddy current PD and the direction of the eddy current ED. Similarly, since the third blocking portions 173 included in the blocking member 170 are spaced apart along the direction of the eddy current ED, no eddy current can flow along the blocking member 170, thereby blocking the generation of eddy current.

[0679] The housing 190 may include a combination of angular and columnar portions. The housing 190 is shown as an integral combination of the angular and columnar portions, but these two parts can be separated. The columnar portion may have a cylindrical shape, a polygonal shape, a columnar shape having at least a curved surface, a convex shape, a truncated pyramidal shape, a truncated conical shape, etc., but the invention is not limited thereto. The housing 190 may be made of a non-conductive material.

[0680] The blocking member 170 may be disposed on the inner surface, outer surface, or interior of the housing 190, as will be referred to below. Figures 109 to 111 Describe it.

[0681] Next, refer to Figure 102 (a), stylus 10 and Figure 101 Compared to the stylus 10 in (a), the blocking member 170 is connected to the grounding portion 180. Furthermore, the blocking member 170 and the grounding portion 180 can be connected at a location spaced apart from the inductor portion 140.

[0682] In this respect, Figure 102 (b) to (d) show in detail the blocking member 170 connected to the grounding part 180.

[0683] Reference Figure 102 (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 in a direction perpendicular to the eddy current PD. The opposing ends 1701 and 1702 of the blocking member 170 are spaced apart by the slit GP. The opposing ends 1701 and 1702 of the blocking member 170 are spaced apart in the direction of the eddy current ED.

[0684] The connecting portion 174 can connect the opposite ends 1701 and 1702 of the blocking member 170 at a position spaced apart from the inductor portion 140 along a direction perpendicular to the eddy current PD. The blocking member 170 can be connected to the ground portion 180 at the location of the connecting portion 174.

[0685] Reference Figure 102 (c) The blocking member 170 includes a plurality of first blocking portions 171 and a first connecting portion 175 that connects the plurality of first blocking portions 171 to each other.

[0686] The first blocking portion 171 extends in the direction PD perpendicular to the eddy current and is spaced apart from each other in the direction ED of the eddy current.

[0687] The first connection portion 175 can be connected to a plurality of first blocking portions 171 at a position spaced apart from the inductor portion 140 along a direction perpendicular to the eddy current PD. The blocking member 170 can be connected to the ground portion 180 at the position of the connection portion 175.

[0688] 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.

[0689] Multiple second blocking portions 172 are spaced apart along the 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.

[0690] The second connection portion 176 can extend from the inductor portion 140 along the direction PD perpendicular to the eddy current, and can connect multiple second blocking portions 172 and additional grounding portions 177.

[0691] An additional grounding portion 177 can be connected to grounding portion 180. Furthermore, the additional grounding portion 177 and grounding portion 180 can be connected at a location spaced apart from the inductor portion 140.

[0692] Next, refer to Figure 103 (a), stylus 10 and Figure 102 Compared to the stylus 10 in (a), the blocking member 170 has the following differences: the blocking member 170 includes a first blocking member 170a arranged to correspond to the inductor portion 140 and a second blocking member 170b connected to the ground portion 180.

[0693] The first blocking member 170a may extend beyond the length CL of the ferrite core 150 of the inductor section 140 in a direction perpendicular to the eddy current PD. The second blocking member 170b is connected to the first blocking member 170a.

[0694] In this respect, Figure 103 (b) to (d) show in detail the blocking member 170, which includes the first blocking member 170a and the second blocking member 170b.

[0695] Reference Figure 103(b) The first blocking member 170a includes a slit GP for blocking the generation of eddy currents. The slit GP extends to the lower end of the second blocking member 170b in a direction perpendicular to the eddy currents PD. 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 portion 140. The length of the slit GP also corresponds to the length ES1 of the first blocking member 170a.

[0696] 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.

[0697] The second blocking member 170b is connected to the upper end of the first blocking member 170a. The second blocking member 170b can 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 relatively small.

[0698] 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 along a direction perpendicular to the eddy current PD and are spaced apart from each other along the direction of the eddy current 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 portion 140. The length of the first blocking portions 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.

[0699] The second blocking member 170b is connected to the upper end of the first blocking member 170a. The second blocking member 170b can 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 multiple blocking portions, the influence of the magnetic field generated by the ferrite core 150 is relatively small.

[0700] 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 perpendicular to the eddy current PD, and the opposite ends of each second blocking portion 172 are spaced apart from each other along the direction of the eddy current ED. Therefore, since the eddy current cannot flow along the first blocking member 170a, the generation of 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.

[0701] The second connection portion 176 extends from the inductor portion 140 in a direction perpendicular to the eddy current PD to connect the first blocking member 170a and the second blocking member 170b.

[0702] The second blocking member 170b is connected to the upper end of the first blocking member 170a. The second blocking member 170b can 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 multiple blocking portions, the influence of the magnetic field generated by the ferrite core 150 is relatively small.

[0703] Next, refer to Figure 104 (a) The stylus 10 includes a conductive tip 110, a conductive connection member 120, a capacitor section 130, an inductor section 140, a blocking member 170, a grounding section 180, and a housing 190. Regarding... Figure 102 Descriptions of parts that are the same as or similar to those shown in (a) will be omitted.

[0704] The position of the inductor section 140 within the housing 190 of the stylus 10 and the position of the inductor section 140 within the housing 190 of the stylus 10 Figure 103 The position of the stylus 10 in the housing 190 of (a) is different. The inductor portion 140 is spaced apart from the conductive tip 110 in the housing 190 of the stylus 10.

[0705] In this respect, Figure 104 (b) to (d) show in detail the blocking member 170, which includes the first blocking member 170a and the second blocking member 170b.

[0706] 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 perpendicular to the eddy current PD. 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 portion 140. The length of the slit GP also corresponds to the length ES1 of the first blocking member 170a.

[0707] 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.

[0708] The second blocking member 170b is connected 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 section 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 relatively small.

[0709] 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 PD and are spaced apart from each other in the direction of the eddy current 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 portion 140. The length of the first blocking portions 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.

[0710] The second blocking member 170b is connected 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 section 140 in a direction opposite to the direction PD. Therefore, even when the second blocking member 170b is not formed to include multiple blocking parts, the influence of the magnetic field generated by the ferrite core 150 is relatively small.

[0711] Reference Figure 104 (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 perpendicular to the eddy current PD, and the opposite ends of each second blocking portion 172 are spaced apart from each other along the direction of the eddy current ED. Therefore, since the eddy current cannot flow along the first blocking portion 170a, the generation of the eddy current is interrupted.

[0712] The second connection portion 176 extends from the inductor portion 140 in a direction perpendicular to the eddy current PD to connect the first blocking member 170a and the second blocking member 170b.

[0713] The second blocking member 170b is connected 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 section 140 in a direction opposite to the direction PD. Therefore, even when the second blocking member 170b is not formed to include multiple blocking parts, the influence of the magnetic field generated by the ferrite core 150 is relatively small.

[0714] Next, refer to Figure 105 (a) The stylus 10 includes a conductive tip 110, a conductive connection member 120, a capacitor section 130, an inductor section 140, a blocking member 170, a grounding section 180, and a housing 190. Regarding... Figure 102 Descriptions of parts that are the same as or similar to those shown in (a) will be omitted.

[0715] The position of the capacitor section 130 within the housing 190 of the stylus 10 is similar to... Figure 101 of (a), Figure 102 (a) and Figure 103 The position of the capacitor portion 130 of the stylus 10 in (a) is different. The capacitor portion 130 is spaced apart from the conductive tip 110 in the housing 190 of the stylus 10.

[0716] Similarly, the inductor section 140 is spaced apart from the conductive tip 110 in the housing 190 of the stylus 10.

[0717] The conductive tip 110 and the conductive connecting member 120 are located at the front of the stylus 10, and the capacitor part 130 and the inductor part 140 are located at the rear of the stylus 10.

[0718] The stylus 10 also includes a blocking member 170 to minimize the impact of the user's hand on the conductive connection member 120 and to prevent eddy currents from being generated by the inductor section 140.

[0719] In this respect, Figure 105 (b) to (d) show the blocking member 170 in detail.

[0720] Reference Figure 105 (b) The blocking member 170 includes a slit GP for blocking the generation of eddy currents. 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.

[0721] The opposing ends 1701 and 1702 of the blocking member 170 are separated by a slit GP. The opposing ends 1701 and 1702 of the blocking member 170 are separated along 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.

[0722] Reference Figure 105 (c) The blocking member 170 includes a plurality of first blocking portions 171 and a first connecting portion 175 that connects the plurality of first blocking portions 171 to each other.

[0723] The first blocking portions 171 extend in a direction perpendicular to the eddy current PD and are spaced apart from each other in the direction of the eddy current ED. The length ES2 of the blocking member 170 can be greater than or equal to the length CL of the ferrite core 150 of the inductor portion 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.

[0724] The first connecting portion 175 can connect a plurality of first blocking portions 171 to each other. The blocking member 170 can be electrically connected to the grounding portion 180 at the location of the connecting portion 175.

[0725] Reference Figure 105 (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 along a direction perpendicular to the eddy current PD, and the opposite ends of each second blocking portion 172 are spaced apart from each other along the direction of the eddy current ED. Therefore, since the eddy current cannot flow along the blocking member 170, the generation of the eddy current is interrupted.

[0726] The second connection portion 176 extends from the inductor portion 140 in a direction perpendicular to the eddy current PD.

[0727] Figure 106 and Figure 107 A schematic diagram showing the structure of a blocking member of a stylus according to several embodiments is shown.

[0728] like Figure 106 As shown, the opposite ends of the blocking members 170a are spaced apart along the direction ED of the eddy current. The blocking members 170a can be printed on the sheet to be attached to the handheld part 190a by electroplating, photolithography, sputtering, etc., or the blocking members 170a can be printed on the handheld part 190a by methods such as electroplating, photolithography, thin film deposition, etc., but the present invention is not limited thereto.

[0729] Reference Figure 106(a) The blocking member 170a includes a slit GP for blocking the generation of eddy currents and a connecting portion 174a for connecting the opposing ends 1701a and 1702a of the blocking member 170a. The slit GP extends in a direction perpendicular to the eddy current PD. The opposing ends 1701a and 1702a of the blocking member 170a are spaced apart from each other by the slit GP. The opposing ends 1701a and 1702a of the blocking member 170a are spaced apart in the direction ED of the eddy current. The connecting portion 174a can connect the opposing ends 1701a and 1702a of the blocking member 170a.

[0730] 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 direction of the eddy current ED. The connecting portion 174a can connect the plurality of first blocking units 171a.

[0731] Reference Figure 106 (c) The blocking member 170a includes a plurality of second blocking units 172a and connecting portions 174a and 176a that connect the plurality of second blocking units 172a.

[0732] Multiple second blocking units 172a are spaced apart along a direction PD perpendicular to the eddy current, and the opposite ends of each second blocking unit 172a are spaced apart from each other along the direction ED of the eddy current. A connecting portion 176a extends along a direction PD perpendicular to the eddy current and can connect multiple second blocking units 172a.

[0733] like Figure 107 As shown, the opposite ends of the blocking members 170b are spaced apart along the direction ED of the eddy current. The blocking members 170b can be printed on the sheet to be attached to the main body 190b by electroplating, photolithography, sputtering, etc., or the blocking members 170b can 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.

[0734] Reference Figure 107 (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 in a direction perpendicular to the eddy current PD. The opposing ends 1701b and 1702b of the blocking member 170b are spaced apart from each other by the slit GP. The opposing ends 1701b and 1702b of the blocking member 170b are spaced apart in the direction ED of the eddy current. The connecting portion 174b can connect the opposing ends 1701b and 1702b of the blocking member 170b.

[0735] 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 direction of the eddy current ED. The connecting portion 174b can connect the plurality of first blocking units 171b.

[0736] Reference Figure 107 (c) The blocking member 170b includes a plurality of second blocking units 172b and connecting portions 174b and 176b that connect the plurality of second blocking units 172b.

[0737] Multiple second blocking units 172b are spaced apart along a direction PD perpendicular to the eddy current, and the opposite ends of each second blocking unit 172b are spaced apart from each other along the direction ED of the eddy current. A connecting portion 176b extends along a direction PD perpendicular to the eddy current and can connect multiple second blocking units 172b.

[0738] Figure 108 The illustration shows touch input generated by hovering a stylus according to various embodiments.

[0739] like Figure 91 As described, when writing, the stylus 10 can move on the touch screen 20 from the end point A of the previous stroke to the start point C of the next stroke, so as to write the previous stroke and then write the next stroke.

[0740] The conductive tip 110 of the stylus 10 contacts the window 22 at one point (first point) A and 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.

[0741] The stylus 10 is spaced apart from the window 22 in region B between the first point A and the second point C. That is, the stylus 10 is hovered over region B. In the hovering state, a signal RS4 with a very small value from the conductive tip 110 of the stylus 10 according to the 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. That is, no touch data corresponding to the connecting stroke NL of region B is generated.

[0742] According to at least one embodiment, a stylus can be provided that prevents unintentional touch input caused by hovering of the stylus.

[0743] According to at least one implementation, a stylus can be provided that is robustly resistant to external factors such as the user's grip.

[0744] According to at least one embodiment, the inductance and capacitance values ​​of the stylus can remain constant, and therefore the resonant frequency can remain constant, thereby improving the touch sensitivity of the touch sensor.

[0745] Next, we will refer to Figures 109 to 111 Describe the positional relationship between the blocking member 170 and the housing 190.

[0746] Figures 109 to 111 A schematic diagram showing the structure of the main body portion of a stylus according to several embodiments is shown.

[0747] First, refer to Figure 109 (a) The stylus 10 includes: a blocking member 170b including a plurality of first blocking units 171b, and a main body 190b.

[0748] Figure 109 (b) shows a cross-section of the stylus 10 cut along the cutting surfaces A1-A2-A3-A4. According to one embodiment, the first blocking unit 171b may be arranged on the inner surface 1902 of the main body portion 190b.

[0749] Next, refer to Figure 110 (a) The stylus 10 includes: a blocking member 170b including a plurality of first blocking units 171b, and a main body 190b.

[0750] Figure 110 (b) shows a cross-section of the stylus 10 cut along the cut surfaces B1-B2-B3-B4. According to one embodiment, the first blocking unit 171b may be arranged on the outer surface 1900 of the main body portion 190b.

[0751] Finally, refer to Figure 111 (a) The stylus 10 includes: a blocking member 170b including a plurality of first blocking units 171b, and a main body 190b.

[0752] Figure 111 (b) shows a cross-section of the stylus 10 cut along the cut surfaces C1-C2-C3-C4. According to one embodiment, the first blocking unit 171b may be arranged between the outer surface 1900 and the inner surface 1902 of the main body portion 190b.

[0753] although Figures 109 to 111 Only the blocking member 170b is described, but the blocking member 170a may also be arranged on the inner surface of the handheld part 190a, on the outer surface of the handheld part 190a, or embedded between its outer and inner surfaces.

[0754] at the same time, Figure 89 The parasitic capacitance Cf in the LLC circuit shown has a greater effect 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 half that of the LC resonant circuit or LCLC resonant circuit. Therefore, as... Figure 89 As shown, when using an LLC resonant circuit, the above structure can be applied to minimize the impact on the capacitor reduced to 1 / 2.

[0755] Figure 112 A schematic diagram of a stylus demonstrating an LLC structure is shown.

[0756] like Figure 112 As shown, the stylus 10 includes a conductive tip 11, a capacitor section 113, two inductor sections 114 and 114', a blocking member 17, a grounding section 18, and a housing 19.

[0757] Inductor section 114 includes a ferrite core 115 and a coil 116 wound around the ferrite core 115, and inductor section 114' includes a ferrite core 115' and a coil 116' wound around the ferrite core 115'. In this case, the two inductor sections 114 and 114' are connected in series.

[0758] The blocking member 17 is a conductive member surrounding the capacitor section 113 and the inductor sections 114 and 114', which can prevent the user's hand from generating parasitic capacitance.

[0759] In this case, the blocking member 117 can be designed such that the opposite ends of the blocking member 17 are spaced apart along the direction ED of the eddy current in order to minimize the influence of the eddy current generated in the stylus 10.

[0760] In this regard, reference will be made to Figure 113 The (a) to (d) sections describe the blocking component 17 in detail.

[0761] Figure 113 Various examples of blocking components are shown.

[0762] like Figure 112 As shown, a clockwise current flows through coils 116 and 16' via a drive signal transmitted from the 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 current in the coils generates eddy currents in a counterclockwise direction, opposite to the direction of the current in the coils, and thus the counterclockwise eddy currents flow in the blocking member 17.

[0763] Reference Figure 113(a) The blocking member 17 includes a slit GP for blocking the generation of eddy currents. The slit GP is perpendicular to the eddy current (in Figure 113 The obstruction member 17 extends in a counter-clockwise direction (PD). Opposite ends 17a and 17b 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 eddy current direction ED.

[0764] Although the slit GP has been described as extending along the direction PD perpendicular to the eddy current, the slit GP can extend along a direction inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD. The opposite 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.

[0765] 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 of the eddy current ED. Similarly, since the blocking member 17 includes a plurality of first blocking portions 171 spaced apart from each other in the direction of the eddy current ED, no eddy current can flow along the blocking member 17, thereby blocking the generation of eddy current. Although the first blocking portions 171 have been described as extending in a direction perpendicular to the eddy current PD, the first blocking portions 171 may extend in a direction inclined at a predetermined angle (greater than 0 degrees and less than 90 degrees) relative to the direction PD.

[0766] 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 along a direction perpendicular to the eddy current PD, and the opposite ends of each second blocking portion 172 are spaced apart from each other along the direction of the eddy current ED. Similarly, since the opposite ends of each second blocking portion 172 included in the blocking member 17 are spaced apart along the direction of the eddy current ED, no eddy current can flow along the blocking member 17, thereby blocking the generation of eddy current.

[0767] Reference Figure 113 (d) The blocking member 17 includes a plurality of third blocking portions 173. The plurality of third blocking portions 173 are spaced apart from each other along the direction perpendicular to the eddy current PD and the direction of the eddy current ED. Similarly, since the third blocking portions 173 included in the blocking member 17 are spaced apart along the direction of the eddy current ED, no eddy current can flow along the blocking member 17, thereby blocking the generation of eddy current.

[0768] In addition to the blocking component 17, the LLC stylus may also include Figures 97 to 111 The blocking components 170, 170a and 170b.

[0769] Figure 114 The driving timing of a touch sensor according to one embodiment is illustrated schematically.

[0770] like Figure 114 As shown, electronic device 2 can operate in the first mode IN1 and the second mode IN2.

[0771] The first mode IN1 is a mode primarily for inputting touches onto the user's body parts (fingers, palms, etc.). During the first mode IN1, a drive signal can be applied to multiple first touch electrodes 111 (FTX), and a sensing signal based on the drive signal can be received by multiple second touch electrodes 121 (FRX).

[0772] During the first mode IN1, the period STX for applying the drive signal that causes the resonant circuit 12 of the stylus 10 to resonate to the loop coil 264 can be repeated at a predetermined period (e.g., 60Hz, 120Hz, etc.). In this case, the first touch electrode 111 and the second touch electrode 121 can receive the sensing signal (SRX). Furthermore, the first mode IN1 can be a mode that only receives input from a user's body part, in which case the period STX for applying the drive signal to the loop coil 264 may not be necessary.

[0773] When touch sensor 261 senses a signal output from stylus 10 via resonance of resonant circuit 12 of stylus 10, electronic device 2 operates in second mode IN2. Furthermore, touch sensor 261 can also operate in second mode IN2 by utilizing an external controller. For example, it can operate in second mode IN2 when executing an application that receives touch input from stylus 10, or when it is anticipated that another sensor will receive touch input from stylus 10.

[0774] The second mode, IN2, is the mode primarily for receiving touches from the stylus 10. During the second mode, IN2, a drive signal is applied to the loop coil 264 (STX), and the signal output from the stylus 10 can be received by the first touch electrode 111 and the second touch electrode 121 (SRX). The touch sensor 261 can identify the waveform of the sensing signal output from the stylus 10. Figure 3 Each of the styluses 10a, 10b, and 10c.

[0775] During the second mode IN2, the time period (FTX / FRX) for receiving touch input from body parts can be repeated at a predetermined cycle (e.g., 60Hz, 120Hz, etc.). In this case, a drive signal can be applied to multiple first touch electrodes 111 (FTX), and the sensing signal based on the drive signal can be received by multiple second touch electrodes 121 (FRX). When identified as Figure 3 When using stylus 10a or stylus 10b, a drive signal may not be applied to the loop coil 264 during this period to reduce power consumption dependent on the application of the drive signal. When identified as... Figure 3 When the stylus 10c is in use, a drive signal can be applied to the loop coil 264 during this period. Thus, the stylus 10c can be charged even during the period of receiving touch input from a body part. Furthermore, the second mode IN2 can be a mode that only receives input from the stylus 10, in which case the period for receiving touch input from a body part (FTX / FRX) is not required.

[0776] Figures 115 to 118 The driving timing of a touch sensor according to several embodiments is shown.

[0777] Figure 115 and Figure 116 Each shows the timing diagram when the touch sensor 261 operates using the mutual capacitance method. Figure 25 and Figure 26 Each shows the timing when the touch sensor 261 operates in a self-capacitance manner.

[0778] like Figure 115 As shown, a drive signal D_111 can be applied to the first touch electrode 111 during the time period Ta, and a sensing signal based on the drive signal D_111 can be received from the second touch electrode 121. In this case, the drive signal D_121 is not applied to the second touch electrode 121.

[0779] Next, the drive signal D_264 can be applied to the loop coil 264 during time period Tb. Then, the signal resonating in the resonant circuit 12 is amplified. Sensing signals from the stylus 10 can be received from the first touch electrode 111 and the second touch electrode 121.

[0780] like Figure 116 As shown, a drive signal D_111 can be applied to the first touch electrode 111 during the time period Ta, and a sensing signal based on the drive signal D_111 can be received from the second touch electrode 121. In this case, the drive signal D_121 may not be applied to the second touch electrode 121, but a drive signal D_264 can be applied to the loop coil 264. The signal resonating in the resonant circuit 12 is amplified.

[0781] Since the sampling frequency of the second touch electrode 12 corresponds to the drive signal D_111, the touch sensor 261 can receive touches from body parts during the time period Ta.

[0782] During time period Tb, only the drive signal D_264 can be applied to the loop coil 264. Sensing signals from the stylus 10 can be received from the first touch electrode 111 and the second touch electrode 121.

[0783] like Figure 117 As shown, during the first time period T1 to the second time period T2, the driving signal D_111 can be applied to the first touch electrode 111, the driving signal D_121 can be applied to the second touch electrode 121, and the driving signal D_264 can be applied to the ring coil 264.

[0784] 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 the frequency corresponding to the drive signal D_111, and the touch of the stylus 10 can be received by setting it to the frequency corresponding to the signal output from the stylus 10.

[0785] like Figure 118 As shown, during time period Ta, a drive signal D_111 can be applied to the first touch electrode 111 to receive touch from a body part, and a sensing signal from the stylus 10 can be received from the second touch electrode 121. In this case, the drive signal D_121 may not be applied to the second touch electrode 121, but the drive signal D_264 can be applied to the loop coil 264. The signal resonating in the resonant circuit 12 is amplified.

[0786] During time period Tb, a drive signal D_121 can be applied to the first touch electrode 121 to receive touch from a body part, and a sensing signal from the stylus 10 can be received from the first touch electrode 111. In this case, the drive signal D_111 may not be applied to the first touch electrode 111, but the drive signal D_264 can be applied to the loop coil 264. The resonant signal in the resonant circuit 12 is maintained.

[0787] As described above, in the touch sensor according to the present invention, while the loop coil 264 transmits electromagnetic signals to the styluses 10a, 10b, and 10c, the touch electrodes 111 and 121 can receive resonant signals from the styluses 10a, 10b, and 10c. In the case of EMR and ECR methods, since the resonant signal is received from the stylus after the transmission of electromagnetic signals has stopped, there is a problem of resonant signal attenuation in the stylus. Because the touch input is determined based on the attenuated resonant signal, the touch input is incorrectly identified, thus reducing touch sensitivity.

[0788] 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 resonant signal simultaneously with the loop coil 264 transmitting the signal, the resonant signal resonating in the stylus 10a is not attenuated and is received by the touch electrodes 111 and 121. This improves the signal's SNR and increases the sensitivity of touch input reception. Next, when a signal is detected... Figure 3 When using stylus 10a or stylus 10b, the waveform of the drive signal applied to the loop coil 264 can be changed to reduce power consumption depending on the application of the drive signal.

[0789] This will refer to Figures 119 to 124 Describe it.

[0790] Figures 119 to 124 A waveform diagram showing the drive signals according to various aspects of one embodiment is shown.

[0791] Reference Figure 119 During the initial period for rapidly bringing the drive signal of the stylus 10 to a predetermined level, the coil driver 263 outputs a drive signal of a predetermined frequency to the loop coil 264. The resonant signal of the stylus 10 can then rapidly reach the predetermined level. Then, during the effective period, the coil driver 263 outputs a drive signal with the predetermined frequency modified (e.g., its duty cycle reduced). The resonant signal of the stylus 10 can then be maintained at the effective level.

[0792] In other words, during the effective period, a drive signal with a lower duty cycle (or operating period) compared to a drive signal with a predetermined frequency can be output to the loop coil 264. For example, when the duty cycle of the drive signal output during the initial period is 1, the duty cycle of the drive signal output during the effective period may decrease to 1 / 3 due to the increase in idle time caused by pulse skipping.

[0793] Reference Figure 120The coil driver 263 raises the resonant signal of the stylus 10 to a predetermined level by outputting a periodic drive signal, which serves as the drive signal for the loop coil 264, during the initial time period. Then, during the subsequent effective time period, compared to the drive signal output to the loop coil 264 during the initial time period, a drive signal in the form of omitting the next pulse is output to the loop coil 264 every time two pulses are output, and the resonant signal of the stylus 10 is maintained at an effective level. That is, during the effective time period, when two pulses are output, the drive signal can be output in the form of omitting the next pulse. Therefore, the drive signal output during the effective time period has a first time period t1 and a second time period t2, in which a pulse signal with the same duty cycle as the pulse output during the initial time period is output, and in the second time period t2, a pulse signal with a lower duty cycle than the first time period t1 is output, and the first time period t1 and the second time period t2 can be repeated. For example, when the duty cycle during the first time period t1 is 1, the duty cycle during the second time period t2 may decrease to 1 / 3 due to the increase in idle time caused by pulse skipping.

[0794] The energy transmitted from the loop coil 264 to the stylus 10 can increase as the period during which the pulse output is skipped during the effective time period decreases. Therefore, as the period during which the pulse output is skipped during the effective time period decreases, the signal level of the pen resonant signal generated during the effective time period increases. (Refer to...) Figure 119 and Figure 120 As an example, in Figure 120 In the drive signal, one pulse is omitted whenever two pulses are output, therefore... Figure 119 Compared to a drive signal that omits one pulse for each output pulse, the signal level of the corresponding pen resonant signal can be increased.

[0795] Furthermore, as the number of time periods during which pulse output is skipped during the effective time period increases, the energy consumed for outputting the drive signal can be reduced. Therefore, as the number of time periods during which pulse output is skipped during the effective time period increases, the energy consumed by the touch sensor 261 during the effective time period can be reduced. (Refer to...) Figure 119 and Figure 120 As an example, in Figure 119 In the drive signal, one pulse is omitted whenever a pulse is output, therefore... Figure 120 Compared to a drive signal that omits one pulse when outputting two pulses, the touch sensor 261 consumes less energy.

[0796] on the other hand, Figure 119 and Figure 120 An example of a drive signal output from coil driver 263 to loop coil 264 is shown, which can be modified in various ways to skip the period of pulse output during the effective period.

[0797] Reference Figure 121 The length of the period during which the same pulse is continuously output can be modified in various ways within the drive signal output to the loop coil 264 during the effective time period. For example, one pulse can be omitted whenever three pulses are output, or whenever four pulses are output. Furthermore, one pulse can be omitted whenever five pulses are output, or whenever six pulses are output. Additionally, one pulse can be omitted whenever seven pulses are output, or whenever eight pulses are output, or whenever nine pulses are output. Therefore, when one pulse is periodically omitted, the duty cycle during the pulse skipping period can have a value of 1 / (2N+1) = 1 / 3.

[0798] Simultaneously, the number of continuously skipped pulses can be modified in various ways in the drive signal output to the loop coil 264 during the effective period. For example, in Figure 121 In the example, the case of periodically omitting only one pulse during the valid time period is shown, but the number of pulses periodically omitted during the valid time period can be changed to two or more. (Refer to...) Figure 122 As an example, a drive signal can be output to periodically skip multiple consecutive pulses (two pulses, three pulses, four pulses, etc.) during the effective time period. For example, when two consecutive pulses are periodically skipped during the effective time period, assuming the duty cycle of the drive signal output during the initial time period is 1, the duty cycle during the pulse skipping period of the effective time period is 1 / (2N+1) = 1 / 5. Furthermore, for example, when three consecutive pulses are periodically skipped during the effective time period, assuming the duty cycle of the drive signal output during the initial time period is 1, the duty cycle during the pulse skipping period of the effective time period is 1 / (2N+1) = 1 / 7. Furthermore, for example, when four consecutive pulses are periodically skipped during the effective time period, assuming the duty cycle of the drive signal output during the initial time period is 1, the duty cycle during the pulse skipping period of the effective time period is 1 / (2N+1) = 1 / 9.

[0799] In addition, Figures 119 to 121 The following scenario is illustrated as an example: after a pulse skips during the valid time period, a pulse is output after an idle time has elapsed; however, the timing of outputting a new pulse after a pulse skip is also variable. (Refer to...) Figure 123As an example, during the effective time period, the pulse output can be resumed immediately at time t3, which is the end of the pulse skip period (interval t3 to t4). Therefore, the phase of the pulse signal output after the pulse skip can be opposite to the phase of the pulse signal output before the pulse skip. In this case, assuming the duty cycle of the drive signal output during the initial time period is 1, the duty cycle during the pulse skip period of the effective time period is 1 / 2N = 1 / 2.

[0800] As described above, the energy transmitted from the loop coil 264 to the stylus 10 can increase as the period of skipped pulse output during the effective time period decreases. Therefore, as the number of consecutively output pulses during the effective time period increases, the energy transmitted from the loop coil 264 to the stylus 10 can increase. Thus, compared to using a drive signal that skips one pulse after outputting three pulses each time, the energy transmitted from the loop coil 264 to the stylus 10 can increase when using a drive signal that skips one pulse after outputting nine pulses each time, and therefore the signal level of the corresponding pen resonance signal can also increase. Furthermore, as the number of skipped pulse output periods during the effective time period increases, the energy consumed for outputting the drive signal decreases. Therefore, as the number of consecutively output pulses during the effective time period decreases, the energy consumption in the touch sensor 261 can decrease. Therefore, compared to using a drive signal that skips one pulse after outputting nine pulses each time, the energy consumption of the touch sensor 261 during the effective time period can decrease when using a drive signal that skips one pulse after outputting three pulses each time.

[0801] At the same time, Figures 119 to 121 The example illustrates a scenario where the signal levels of the pulses output during the initial and effective periods are the same. However, the signal levels of the pulses output during the initial and effective periods can differ. For instance, the touch sensor 261 can 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, thereby shortening the time until the pen resonance signal of the stylus 10 reaches a predetermined level. Furthermore, for example, the touch sensor 261 can 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, thereby increasing the energy transmitted to the stylus 10 during the effective period.

[0802] Reference Figure 124 During the initial period, a first drive signal, consisting of pulses that repeat at a high level IH at a predetermined period, is applied to the loop coil 264. During the initial period, the resonant signal of the stylus 10 can be rapidly reached (i.e., saturated) by the first drive signal.

[0803] During the active period, drive signals with multiple periods having different disabled levels are applied to the loop coil 264.

[0804] For example, when the duty cycle of the first drive signal output during the initial time period (the ratio of the disabled level period to the enabled level period during one repetition cycle P) is 1:1, the duty cycle of the drive signal output during the effective time 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), etc., where a and b are integers. The time period corresponding to one cycle P of the drive signal output during the effective time period may include: a time period in which the enabled level period and the disabled level period are repeated at least n times, and a time period in which the disabled level period is maintained at least 2n times. The enabled level period corresponds to the time period in which the drive signal has an enabled level IH, and the disabled level period corresponds to the time period in which the drive signal has a disabled level IL. The duty cycle of the drive signal is only an example and may include all ratios for allowing the resonant signal of the stylus 10, which has reached a predetermined level, to be maintained at the effective level.

[0805] The resonant signal of the stylus 10, which reaches a predetermined level through the first drive signal during the initial period, can be maintained at an effective level through the drive signal during the effective period. Here, the effective level indicates the level at which the touch controller 262 can detect the resonant signal of the stylus 10 as a touch signal.

[0806] The drive signal during the effective time period can be a signal that periodically omits at least one pulse from the first drive signal during the initial time period. As described above, the drive signal during the effective time period is output in a manner that periodically omits at least one pulse compared to the first drive signal before the initial time period, therefore the pulse rates of the first drive signal during the initial time period and the drive signal during the effective time period can be different from each other. That is, the pulse rate of the drive signal during the effective time period can be lower than the pulse rate of the first drive signal during the initial time period. Here, the pulse rate can be the number of pulses output per unit time (e.g., 1 second).

[0807] As the number of skipped pulses in the drive signal decreases during the effective time period, the energy transmitted from the touch sensor 261 to the stylus 10 can increase. Therefore, as the number of skipped pulses in the drive signal decreases during the effective time period, the signal level of the pen resonance signal generated during the effective time period increases. Furthermore, as the number of skipped pulses in the drive signal increases during the effective time period, the energy consumed for outputting the drive signal can decrease. Therefore, as the number of skipped pulses in the drive signal increases during the effective time period, the energy consumed by the touch sensor 261 during the effective time period can decrease.

[0808] According to the implementation method, the signal-to-noise ratio (SNR) of the signal output from the stylus can be improved, thereby increasing the sensitivity of touch input reception and calculating more accurate touch positions.

[0809] According to the implementation, it has the advantage of being able to perform palm rejection, and has the following advantage: by reducing the energy consumption of the touch sensor during the period when the drive signal is output to the touch sensor for resonance of the stylus, the energy consumption of the touch sensor can be reduced.

[0810] Next, we will refer to Figure 125 A driving method for an electronic device according to one embodiment is described.

[0811] Figure 125 A flowchart illustrating a driving method for an electronic device according to one embodiment is shown.

[0812] During the first time period, the electronic device 2 is driven in a first mode (S10). The first mode is a mode in which a drive signal for detecting touch input from a touch object other than the stylus 10 is applied to the touch sensor 261.

[0813] For example, in the first mode, the first driver / receiver 2620 outputs a drive signal to the first touch electrodes 111-1 to 111-m, and the second driver / receiver 2622 receives touch-dependent sensing signals from the second touch electrodes 121-1 to 121-n.

[0814] The controller 2624 can determine whether the sensing signal is a valid touch signal based on whether the signal amplitude of the sensing signal acquired during the first time period exceeds a first threshold, and can obtain touch coordinate information by using the valid touch signal.

[0815] For example, when the signal amplitude of the sensing signal acquired during the first time period exceeds a first threshold, the controller 2624 uses the sensing signal to calculate touch coordinates. When the signal amplitude of the sensing signal acquired during the first time period is less than or equal to the first threshold, the controller 2624 will not calculate touch coordinates based on the sensing signal with a signal amplitude less than or equal to the first threshold. Furthermore, when the signal amplitude of the sensing signal acquired during the first time period exceeds the first threshold, the controller 2624 can use the sensing signal to calculate the touch area. The sensing signal acquired during the first time period includes at least one of a first sensing signal caused by a user's body part (finger, palm, etc.) and a second sensing signal caused by the stylus 10. The first threshold can be set such that the first sensing signal is determined as a valid touch signal while the second sensing signal is filtered out.

[0816] During the first sub-period of the second time period, the electronic device 2 is driven in a second mode (S20). The second mode is a mode in which a drive signal for detecting touch input from the stylus 10 is applied to the loop coil 264. For example, the coil driver 263 simultaneously applies a drive signal to the loop coil 264.

[0817] It is assumed that the frequency of the drive signal applied to the touch sensor 261 during the first time period is equal to or less than the frequency of the drive signal applied to the loop coil 264 during the first sub-time period. Furthermore, the frequency of the drive signal applied to the loop coil 264 during the first sub-time period can be an integer (greater than or equal to 2) times the frequency of the horizontal synchronization signal of the signal controller 220.

[0818] During the second sub-period of the second time period, the electronic device 2 receives a resonant sensing signal based on the driving signal at least once (S30).

[0819] For example, the resonant circuit 12 of the stylus 10 resonates with the drive signal, thereby generating a resonant signal that is transmitted to the touch sensor 261 through the conductive tip 11.

[0820] In one embodiment, the first driver / receiver 2620 receives sensing signals transmitted from the first touch electrodes 111-1 to 111-m at least once, and the second driver / receiver 2622 also receives sensing signals transmitted from the second touch electrodes 121-1 to 121-n at least once. In this case, the timing of the first driver / receiver 2620 and the second driver / receiver 2622 receiving the sensing signals can be the same. Then, the first driver / receiver 2620 and the second driver / receiver 2622 can process the received sensing signals to transmit them to the controller 2624.

[0821] Although it has been described above that during the second sub-period, the first driver / receiver 2620 receives sensing signals transmitted from the first touch electrodes 111-1 to 111-m and the second driver / receiver 2622 also receives 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 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 sensing signals transmitted from the second touch electrode 121-1 to 121-n. The sensing signal transmitted by at least one of the first touch electrodes 111-1 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 operation of the first driver / receiver 2620 and the second driver / receiver 2622 is not limited to the above operations.

[0822] Furthermore, 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 sensing signals 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 sensing signals from all of the second touch electrodes 121-1 to 121-n.

[0823] 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, which are received during a period determined in response to a horizontal synchronization signal.

[0824] In another embodiment, the first driver / receiver 2620 is synchronized with a horizontal synchronization signal to receive sensing signals transmitted from the first touch electrodes 111-1 to 111-m, and the second driver / receiver 2622 is also synchronized with a horizontal synchronization signal to receive 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 to transmit them to the controller 2624.

[0825] The controller 2624 generates touch information by using sensing signals received synchronously with a horizontal synchronization signal by a first driver / receiver 2620 and a second driver / receiver 2622.

[0826] The controller 2624 can determine whether the sensing signal is a valid touch signal based on whether the signal amplitude of the sensing signal acquired during the second sub-period exceeds a second threshold, and can obtain touch coordinate information related to the point where the touch of the stylus 10 occurs by using the valid touch signal.

[0827] For example, when the signal amplitude of the sensing signal acquired during the second sub-time period exceeds the second threshold, the controller 2624 uses the sensing signal to calculate the touch coordinates. When the signal amplitude of the sensing signal acquired during the second sub-time period is less than or equal to the second threshold, the controller 2624 will not calculate the touch coordinates based on the sensing signal with a signal amplitude less than or equal to the second threshold. Furthermore, when the signal amplitude of the sensing signal acquired during the second sub-time period exceeds the second threshold, the controller 2624 can use the sensing signal to calculate the touch area.

[0828] In this case, the drive signal during the second sub-period of the second time period can be a signal that periodically omits at least one pulse, as described above. For example, the coil driver 263 boosts the resonant signal of the stylus 10 to a predetermined level by outputting a periodic drive signal as the drive signal for the loop coil 264 during the first sub-period. Then, during the second sub-period, compared to the drive signal output to the loop coil 264 during the initial time period, a drive signal in the form of omitting the next pulse is output to the loop coil 264 every two pulses, and the resonant signal of the stylus 10 is maintained at an effective level.

[0829] Next, we will refer to Figure 126 The description includes the driving signal applied during the first and second time periods, the resonant signal of the stylus 10, and the sensing signal.

[0830] Figure 126 The display shows according to Figure 125 The timing diagram shows an example of the horizontal synchronization signal Hsync and the drive signal for the driving method.

[0831] A touch reporting frame period, based on the touch reporting rate, includes a first period T1 and a second period T2. The touch reporting rate indicates the 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.

[0832] During the first time 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 can receive a sensing signal from the second touch electrodes 121-1 to 121-n. The touch controller 262 can obtain touch coordinate information based on the signal amplitude of the sensing signal.

[0833] During the first sub-period T21 of the second time period T2, the coil driver 263 applies a drive signal to the loop coil 264.

[0834] The frequency of the drive 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 drive signal output to the loop coil 264 during the first sub-period T21 can be an integer (greater than or equal to 2) multiple of the frequency of the horizontal synchronization signal. In contrast, during the first sub-period T1, the frequency of the drive signal output to the first touch electrodes 111-1 to 111-m is different from the resonant frequency of the stylus 10.

[0835] The frequency setting of the drive signal is only an example and can be set to values ​​different from those above. Specifically, the touch controller 262 can select from the signal controller (e.g., Figure 24 Touch controller 262 (2524) receives horizontal synchronization signal Hsync, scan drive control signal, data drive control signal, etc. Then, touch controller 262 can set the frequency of the drive signal provided to loop coil 264 based on horizontal synchronization signal Hsync, and can synchronize the drive signal with horizontal synchronization signal Hsync. For example, touch controller 262 can set the frequency of the drive signal to an integer (greater than or equal to 2) multiple of the frequency of horizontal synchronization signal Hsync. Then, the resonant frequency of stylus 10 can be designed to be an integer (greater than or equal to 2) multiple of the frequency of horizontal synchronization signal Hsync. Touch controller 262 can synchronize the drive signal with the pulses of horizontal synchronization signal Hsync.

[0836] During the second sub-period T22 of the second time period T2, the first driver / receiver 2620 synchronizes with each pulse of the horizontal synchronization signal Hsync to receive 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. Furthermore, during the second sub-period T22, each of the first driver / receiver 2620 and the second driver / receiver 2622 may receive a sensing signal at least once.

[0837] During the second sub-period T22, no driving signal is applied, and the resonant signal output by the resonant circuit 12 of the stylus 10 can 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.

[0838] The pulse period of the horizontal synchronization signal Hsync is one horizontal time period (1H) required to write data to a pixel 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 time period during 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 scan line generate parasitic capacitance with the touch electrode, the voltage applied to the data line and scan line during the data write period TA introduces noise into the sensing signal sent to the touch electrode.

[0839] In one embodiment, the touch controller 262 can generate touch information using sensing signals received during a noise-free period TB, excluding the data write period TA. The data write period TA and the noise-free period TB can be set differently depending on the display device and the driving method of the display device.

[0840] Specifically, at each of the multiple 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.

[0841] The touch controller 262 generates a received signal by using the sensing signal received at the sampling point during the noise-free period TB.

[0842] For example, when the touch controller 262 only receives the horizontal synchronization signal Hsync, the touch controller 262 can determine a data writing period TA from a predetermined first moment after the time point when the pulse of the horizontal synchronization signal Hsync is generated to a predetermined second moment. The predetermined second moment exceeds the predetermined first moment, and various settings can be made according to the driving method of the display unit 250, which is not limited to this invention. Then, the touch controller 262 generates a received signal by using the remaining sensing signals other than the sensing signals sampled during the data writing period TA.

[0843] As another example, when the touch controller 262 receives a scan drive control signal, the touch controller 262 can determine, based on the scan drive control signal, the period during which the scan signal has an enable level as the data write period TA. Then, the touch controller 262 generates a received signal using the remaining sensing signals besides the sensing signals sampled during the data write period TA.

[0844] As another example, when the touch controller 262 receives a data drive control signal, the touch controller 262 can determine, based on the data drive control signal, the period during which the data signal has an enable level as the data write period TA. Then, the touch controller 262 generates a receive signal using the remaining signals other than the sensing signal sampled during the data write period TA.

[0845] In another embodiment, it may be preferred 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.

[0846] Specifically, during the noise-free 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 can receive sensing signals from the second touch electrodes 121-1 to 121-n.

[0847] In other words, during the period excluding the time when the scan signal has an enabled level, the touch controller 262 can receive the 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 can determine the time period when the scan signal has a disabled level based on the scan drive control signal. When the touch controller 262 only receives the horizontal synchronization signal Hsync, the touch controller 262 can determine the time 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 the time period when the scan signal has an enabled level, and the predetermined fourth time exceeds the predetermined third time. Various settings can be made according to the driving method of the display unit 250, and the present invention is not limited thereto.

[0848] Furthermore, during a period excluding the time when data signals are applied to the data lines of the display panel 251, the touch controller 262 can receive sensing signals from the touch sensor 261 based on at least one of the horizontal synchronization signal Hsync and the data drive control signal. When the touch controller 262 receives the data drive control signal, it can determine the time period for applying data signals to the data lines based on the data drive control signal. When the touch controller 262 only receives the horizontal synchronization signal Hsync, it can determine the time period for applying data signals to the data lines as starting from a predetermined fifth time after the time point when the pulse of the horizontal synchronization signal Hsync is generated, up to a predetermined sixth time. If the predetermined fifth time exceeds the predetermined sixth time, various settings can be made according to the driving method of the display unit 250, and the present invention is not limited thereto.

[0849] The second time period T2 includes multiple first sub-time periods T21 and multiple second sub-time periods T22. For example, during the second time period T2, the combination of the first sub-time periods T21 and the second sub-time periods T22 can be repeated eight times.

[0850] 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. The durations of the first time period T1 and the second time period T2 can be changed respectively during multiple touch report frames, and the driving method of the electronic device 2 in this embodiment is not limited to this.

[0851] Next, we will refer to Figures 127 to 126 This describes one aspect of the display unit.

[0852] Figure 127 A schematic display is shown. Figure 2 A block diagram of one aspect of the display unit. Figure 128 It shows Figure 127 The pixels of the display unit, and Figure 129 The display shows the drive Figure 127 A timing diagram of an example of the drive signals for the display unit.

[0853] like Figure 127 As shown, the display unit includes: a display panel 251 containing multiple pixels PX, a data driver 2522, a scan driver 2520, and a signal controller 2524.

[0854] Display panel 251 includes a plurality of pixels PX arranged in a generally matrix form. Although there are no particular restrictions, a plurality of scan lines S1 to Si extend generally parallel to each other in the opposite direction to the row direction of the arranged pixels, and a plurality of data lines D1 to Dj extend generally parallel to each other in the generally column direction.

[0855] Each pixel PX connected to the display panel 251 is connected to a corresponding scan line among scan lines S1 to Si and a corresponding data line among data lines D1 to Dj. Furthermore, although not in Figure 127 The display panel 251 is shown directly, but each pixel PX is connected to a power supply connected to the display panel 251 to receive a first power supply voltage ELVDD and a second power supply voltage ELVSS.

[0856] Each pixel PX emits light with a predetermined brightness based on the corresponding data signal transmitted through data lines D1 to Dj, via the driving current supplied to the organic light-emitting diode.

[0857] The scan driver 2520 generates scan signals corresponding to each pixel and transmits the scan signals through scan lines S1 to Si. That is, the scan driver 2520 transmits scan signals to each pixel included in each pixel row through the corresponding scan lines.

[0858] The scan driver 2520 receives the scan drive control signal CONT2 from the signal controller 2524 to generate multiple 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.

[0859] The data driver 2522 transmits data signals to each pixel via data lines D1 to Dj.

[0860] The data driver 2522 receives the data drive control signal CONT1 from the signal controller 2524 and supplies data signals corresponding to the data lines D1 to Dj connected to each pixel in each pixel row.

[0861] The signal controller 2524 converts externally transmitted image signals 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 control signals for controlling the drives of the scan driver 2520 and the data driver 2522, transmitting these control signals to each of them. Specifically, the signal controller 2524 generates and transmits a scan drive control signal CONT2 for controlling the scan driver 2520 and a data drive control signal CONT1 for controlling the data driver 2522.

[0862] like Figure 128As shown, pixel PX_lk may include an organic light-emitting diode (OLED), a first transistor TR1, a second transistor TR2, and a storage capacitor Cst. Pixel PX_lk may be located in the l-th pixel row and the k-th pixel column. For ease of description, it is assumed that each transistor is a PMOS transistor.

[0863] 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 supply voltage ELVDD, and a drain connected to the anode of the organic light-emitting diode (OLED).

[0864] The drive current is the current corresponding to the voltage difference between the gate and source of the first transistor TR1, and the drive current changes in response to the voltage of the data signal applied to the data line D1.

[0865] 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. In response to the corresponding scan signal S[k] transmitted through the k-th scan line Sk, the second transistor TR2 transmits the data voltage according to the data signal D[l] transmitted through the l-th data line D1 to the first node N1.

[0866] The storage capacitor Cst is connected between the first power supply voltage ELVDD and the first node N1. In one embodiment, the storage capacitor Cst may include a first electrode connected to the first power supply voltage ELVDD and a second electrode connected to the first node N1.

[0867] An organic light-emitting diode (OLED) can emit light via a drive current flowing from a first transistor TR1. In one embodiment, the OLED may include an anode connected to the drain of the first transistor TR1 and a cathode connected to a second power supply voltage ELVSS.

[0868] like Figure 129 As shown, the pulse period of the vertical synchronization signal Vsync can be one frame period (1 FRAME) of the display panel 251, depending on the display frame rate.

[0869] During a frame period (1 FRAME), the data driver 2522 can be synchronized with the horizontal sync signal Hsync to apply an enabled data signal to data lines D1 to Dj. For example, for each pulse of the horizontal sync signal Hsync, the data driver 2522 applies a data signal to all data lines D1 to Dj, which corresponds to a pixel connected to a scan line to which a scan signal with a low-level voltage L is applied.

[0870] During a frame period (1 FRAME), the scan driver 2520 can 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.

[0871] Within a horizontal time period 1H, that is, within one cycle of the pulse of the horizontal synchronization signal Hsync, there is a time period dwp in which the data signal is applied to the data line and a time period sp in which the scan signal is a low-level voltage L.

[0872] Regarding time periods dwp and sp, as an example, the pixels connected to scan line Sk and data line DL will be described.

[0873] At t00, a horizontal time period 1H begins. At t01, the data signal DATA[k] is applied to the data line Dl. At t10, the scan signal S[k] applied to the scan line Sk becomes a low-level voltage L.

[0874] The time t10 when the scan signal S[k] becomes a low-level voltage L is the same as or different from the time t01 when the data signal DATA[k] is first applied to the data line Dl. For example, considering the RC delay of the data line Dl, the data signal DATA[k] can be applied to the data line Dl before the scan signal S[k] becomes a low-level voltage L.

[0875] At t11, the scan signal S[k] becomes a high-level voltage H. At t12, the application of the data signal DATA[k] to the data line D1 stops. At t22, a horizontal time period 1H ends.

[0876] The time t11 when the scan signal S[k] becomes a high-level voltage H and the time t12 when the data signal DATA[k] is stopped being applied to the data line Dl can be the same or different. For example, the application of the data signal DATA[k] to the data line Dl can be stopped after the scan signal S[k] becomes a high-level voltage H.

[0877] Figure 126The data write period TA described herein includes period dwp and period sp. Specifically, the data write period TA begins at the earlier of the start time of period dwp and the start time of period sp, and ends at the later of the end time of period dwp and the end time of period sp. For example, the data write period TA can be a period from t01 to t12.

[0878] Reference Figure 27 and Figure 28 Describe the operation of the touch sensor 261 connected to the display panel 251.

[0879] Figure 130 and Figure 131 Each shows an electronic device according to one embodiment. Figure 125 The timing diagram of the driving method receiving the sensing signal, wherein... Figure 126 The horizontal synchronization signal of the display unit synchronously receives the sensing signal.

[0880] like Figure 130 As shown, during the first sub-period T21, the frequency of the drive signal D_264 can be twice the frequency of the horizontal synchronization signal Hsync.

[0881] In response to the frequency of the drive signal D_264 applied during the first sub-period T21, the first driver / receiver 2620 and the second driver / receiver 2622 can sample the sensed signal during the second sub-period T22. For example, the first driver / receiver 2620 and the second driver / receiver 2622 can sample the sensed 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 drive signal D_264. At least one sampling time s00, s01, s02, s03, s10, s11, s12, s13, ... of the present invention can be any timing sequence that can be periodically set with respect to the frequency of the drive signal D_264.

[0882] When the period of the horizontal synchronization signal Hsync changes due to interface delays between the signal controller 220 and the touch controller 262 after the pulse synchronization of the drive signal and the horizontal synchronization signal Hsync, an inconsistency may occur between the sampling time (e.g., the frequency of the clock signal used to sample the sensing signal is four times the frequency of the drive signal D_264) and a horizontal time period 1H according to the horizontal synchronization signal Hsync, wherein the sampling time is periodically set according to the frequency of the drive signal D_264, and the period of the horizontal time period 1H changes.

[0883] For example, when the period of the horizontal synchronization signal Hsync changes after synchronization with the first pulse, the clock signal used to sample the sensing signal is synchronized with the first pulse, thus changing the timing of sampling moments within a horizontal time period 1H. Therefore, it becomes difficult to distinguish whether the sensing signal sampled within a horizontal time period 1H was sampled within time periods dwp and sp, or within time periods other than dwp and sp.

[0884] Therefore, the drive 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 drive signal can be refreshed every predetermined horizontal time interval or every predetermined frame.

[0885] For example, the drive signal D_264 can be synchronized with the pulses of the horizontal synchronization signal Hsync over a predetermined time period. For instance, the pulses of the drive signal D_264 can begin synchronously with the first pulse of the horizontal synchronization signal Hsync, and then the pulses of the drive signal D_264 can begin synchronously with the i-th pulse of the horizontal synchronization signal. Therefore, even when the period of the horizontal synchronization signal Hsync changes, the sampling time periodically set according to the frequency of the drive signal D_264 can still be a desired time within a horizontal time period of 1H.

[0886] As another example, the drive signal D_264 can be synchronized with the pulses of the vertical synchronization signal Vsync for each frame within a predetermined time period. For example... Figure 129 As shown, the pulse of the vertical synchronization signal Vsync can be switched to the enable level H with the same timing as the pulse of the horizontal synchronization signal Hsync within a horizontal time interval 1H. Therefore, by synchronizing the pulse of the vertical synchronization signal Vsync with the drive signal D_264 in each frame, 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 period 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 a horizontal time interval 1H within a frame synchronized with the vertical synchronization signal Vsync.

[0887] Furthermore, in this invention, at least one sampling time s00, s01, s02, s03, s10, s11, s12, s13, ... may include at least two viewpoints whose phases are opposite to each other within one cycle of the frequency of the driving signal D_264. This invention is not limited to the above description.

[0888] Furthermore, in this invention, at least one sampling time s00, s01, s02, s03, s10, s11, s12, s13, ... may include at least two viewpoints, the phase of which changes within one cycle of the frequency of the driving signal D_264. This invention is not limited to the above description.

[0889] Touch controller 262 generates touch information by using sensing signals sampled during a period other than time periods dwp and sp within a horizontal time period 1H. That is, touch controller 262 can generate touch information indicating touch coordinates, touch intensity, etc. by using sensing signals sampled by first driver / receiver 2620 and second driver / receiver 2622 at at least one sampling time s10, s11, s12, s13, ...

[0890] In this configuration, the touch controller 262 can obtain the signal amplitude (i.e., the amplitude) of the sensed 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. Furthermore, the touch controller 262 can obtain the signal level of the sensed 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 sensed signal.

[0891] Alternatively, the touch controller 262 can control the first driver / receiver 2620 and the second driver / receiver 2622 to sample the sensing signal during a horizontal time period 1H, excluding the time periods dwp and sp.

[0892] like Figure 131 As shown, during the first sub-period T21, the frequency of the drive signal D_264 can be three times the frequency of the horizontal synchronization signal Hsync.

[0893] 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 these selected sensing signals. That is, the touch controller 262 uses the sensing signals sampled during the time periods other than time periods dwp and sp during one horizontal time period 1H within the second sub-period T22 as touch information.

[0894] Within a horizontal time period 1H, the sensing signals sampled during time periods other than time period dwp (during which the touch controller 262 applies a data signal to the data line) and time period sp (during which the scan signal is a low-level voltage L) are used as touch information, while the sensing signals that generate noise based on the signals applied to the data line and scan line, which can generate parasitic capacitance with the touch electrodes, are not used as touch information, thus improving the SNR.

[0895] According to one embodiment, during a horizontal time period 1H within the second sub-time period T22, excluding time periods dwp and sp, 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.

[0896] By sampling the sensing signal during a horizontal time period 1H by the first driver / receiver 2620 and the second driver / receiver 2622, excluding the time period dwp (during which the data signal is applied to the data line) and the time period sp (during which the scan signal is at the enable level voltage L), the effect of preventing noise from 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 obtained.

[0897] Next, we will refer to Figure 132 and Figure 133 Describe another aspect of the display unit, and refer to Figure 134 Description of the link Figure 132 The operation of the touch sensor unit of the display panel of the display unit.

[0898] Figure 132 A schematic display is shown. Figure 2 A block diagram of another aspect of the display unit. Figure 133 It shows Figure 132 The pixels of the display unit, and Figure 134 An electronic device according to one embodiment is shown. Figure 125 The timing diagram of the driving method receiving the sensing signal, wherein... Figure 132 The horizontal synchronization signal of the display unit synchronously receives the sensing signal.

[0899] like Figure 132 As shown, the display unit includes: a display panel 251 comprising multiple pixels PX, a data driver 2522, a scan driver 2520, a transmission control driver 2526, and a signal controller 2524.

[0900] Display panel 251 includes a plurality of pixels PX arranged in a generally matrix form. Although there are no particular restrictions, a plurality of scan lines S0 to Si and a plurality of emission control lines E1 to Ei extend generally parallel to each other in the opposite direction to the row direction of the arranged pixels, and a plurality of data lines D1 to Dj extend generally parallel to each other in the generally column direction.

[0901] Each pixel PX is connected to two corresponding scan lines S0 to Si, one corresponding emission control line E1 to Ei, and one corresponding data line D1 to Dj, all connected to the display panel 251. Furthermore, although not in Figure 132 The display panel 251 is shown directly, but each pixel PX is connected to a power supply connected to the display panel 251 to receive a first power supply voltage ELVDD, a second power supply voltage ELVSS, and an initialization voltage VINT.

[0902] 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 containing the corresponding pixel and the scan line corresponding to the previous 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).

[0903] Each pixel PX emits light with a predetermined brightness by means of a driving current supplied to an organic light-emitting diode, based on the corresponding data signals transmitted through data lines D1 to Dj.

[0904] The scan driver 2520 generates a scan signal corresponding to each pixel PX and transmits the scan signal through 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 lines.

[0905] The scan driver 2520 receives the scan drive control signal CONT2 from the signal controller 2524 to generate multiple scan signals, and then supplies the scan signals to the scan lines S0 to Si connected to each pixel row.

[0906] The data driver 2522 transmits data signals to each pixel via data lines D1 to Dj.

[0907] The data driver 2522 receives the data drive control signal CONT1 from the signal controller 2524 and supplies data signals corresponding to the data lines D1 to Dj connected to each pixel in each pixel row.

[0908] The emission control driver 2526 is connected to emission control lines E1 to Ei, which are connected to the display panel 251, which includes pixels PX arranged in a matrix. That is, the emission control lines E1 to Ei, which extend generally parallel to each other in a direction opposite to the generally upward direction of each pixel, connect each pixel PX to the emission control driver 2526.

[0909] The transmit control driver 2526 generates a transmit control signal corresponding to each pixel and transmits the transmit control signal through transmit control lines E1 to Ei. Each pixel receiving the transmit control signal is controlled to transmit an image based on the image data signal in response to the control of the transmit control signal. That is, the transmit control transistor included in each pixel is controlled in response to the transmit control signal transmitted through the corresponding transmit control line. Figure 133 The operation of TR5 and TR6 in the transistor means that the organic light-emitting diode connected to the light-emitting control transistor may or may not emit light with brightness depending on the drive current corresponding to the data signal.

[0910] A first power supply voltage ELVDD, a second power supply voltage ELVSS, and an initialization voltage VINT are supplied to each pixel PX of the display panel 251. The first power supply voltage ELVDD can be a predetermined high-level voltage, and the second power supply voltage ELVSS can be a voltage lower than the first power supply voltage ELVDD or a ground voltage. The initialization voltage VINT can be set to be equal to or lower than the second power supply voltage ELVSS.

[0911] The voltage values ​​of the first power supply voltage ELVDD, the second power supply voltage ELVSS, and the initialization voltage VINT are not specifically limited.

[0912] The signal controller 2524 converts multiple externally transmitted image signals into multiple image data signals DATA and sends the converted image signals to the data driver 2522. The signal controller 2524 receives a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, and a clock signal controlling the drive of the scan driver 2520, and generates and transmits control signals for controlling the scan driver 2520, the transmit control driver 2526, and the data driver 2522, respectively. That is, the signal controller 2524 generates and transmits a data drive control signal CONT1 for controlling the data driver 2522, a scan drive control signal CONT2 for controlling the scan driver 2520, and a transmit drive control signal CONT3 for controlling the operation of the transmit control driver 2526.

[0913] like Figure 133As shown, pixel PX_ab includes an organic light-emitting diode (OLED), a storage capacitor Cst, and first to seventh transistors TR1 to TR7. Pixel PX_ab can be located in the a-th pixel row and the b-th pixel column. For ease of description, it is assumed that each transistor is a PMOS transistor.

[0914] The first transistor TR1 includes a gate connected to a first node N1, a source connected to a second node N2 connected to the drain of the fifth transistor TR5, and a drain connected to a third node N3. A drive current...

Claims

1. A touch device, comprising: Conductive ring; and A touch module configured to apply a first drive signal to one end of the conductive ring. The other end of the conductive ring is grounded.

2. The touch device according to claim 1, further comprising: Multiple touch electrodes, The touch module is further configured to receive a detection signal from at least one of the plurality of touch electrodes.

3. The touch device according to claim 2, wherein, The touch module is also configured to apply the first drive signal to the conductive ring during a first time period, and to receive the detection signal from at least one of the plurality of touch electrodes during a second time period following the first time period.

4. The touch device according to claim 2, wherein, The plurality of touch electrodes are located on the same layer as the conductive ring.

5. The touch device according to claim 2, wherein, The conductive ring and the plurality of touch electrodes are made of the same material.

6. The touch device according to claim 2, wherein, The conductive ring includes a first wire and a second wire extending along a first direction, and a third wire extending along a second direction intersecting the first direction. The touch electrode extending along the first direction among the plurality of touch electrodes is located between the first wire and the second wire.

7. The touch device according to claim 1, wherein, The conductive ring comprises multiple rings.

8. The touch device according to claim 7, wherein, The multiple rings comprise multiple wires of the same width.

9. The touch device according to claim 7, wherein, The multiple rings are made of the same material.

10. An electronic device, comprising: The display unit includes a plurality of pixels; The conductive ring on the display unit; and A touch module configured to apply a first drive signal to one end of the conductive ring. The other end of the conductive ring is grounded.

11. The electronic device of claim 10, further comprising: Multiple touch electrodes on the display unit, The touch module is further configured to receive a detection signal from at least one of the plurality of touch electrodes.

12. The electronic device according to claim 11, wherein, The touch module is also configured to apply the first drive signal to the conductive ring during a first time period, and to receive the detection signal from at least one of the plurality of touch electrodes during a second time period following the first time period.

13. The electronic device according to claim 11, wherein, The plurality of touch electrodes are located on the same layer as the conductive ring.

14. The electronic device according to claim 11, wherein, The plurality of touch electrodes comprise the same material as the conductive ring.

15. The electronic device according to claim 11, wherein, The conductive ring includes a first wire and a second wire extending along a first direction, and a third wire extending along a second direction intersecting the first direction. The touch electrode extending along the first direction among the plurality of touch electrodes is located between the first wire and the second wire.

16. The electronic device according to claim 10, wherein, The conductive ring comprises multiple rings.

17. The electronic device according to claim 16, wherein, The multiple rings comprise multiple wires of the same width.

18. A touch system, comprising: A stylus, the stylus including a resonant circuit; and An electronic device comprising a conductive ring and a touch module, the touch module being configured to apply a first driving signal to one end of the conductive ring. The other end of the conductive ring is grounded.

19. The touch system according to claim 18, wherein, The electronic device also includes multiple touch electrodes. The touch module is also configured to receive a detection signal from at least one of the plurality of touch electrodes.

20. The touch system according to claim 19, wherein, The detection signal is generated by the resonant circuit based on the signal generated by the resonance of the first drive signal.

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