Touch display device and electronic equipment

Abstract

This application discloses a touch display device and an electronic device, belonging to the field of electronic product technology. The touch display device includes: a flexible display panel and a touch layer disposed on the flexible display panel; the touch layer includes a first region, on which a plurality of touch electrode groups spaced apart along a first direction are disposed, each touch electrode group including a plurality of touch electrodes arranged sequentially along a second direction; adjacent touch electrodes are connected by a switching unit; N first touch electrodes among the plurality of touch electrodes are provided with antenna feed points; N is a positive integer, and N≥1; the touch display device further includes: a radio frequency integrated circuit, the radio frequency integrated circuit being electrically connected to the antenna feed points; and a control circuit, the control circuit being connected to at least one of the switching units. When the flexible display panel is in a folded state, the control circuit controls some of the switching units to disconnect, solving the problem that the resonant mode in the U-shaped cavity affects antenna performance.

Description

Technical Field

[0001] This application belongs to the field of electronic product technology, specifically relating to a touch display device and an electronic device. Background Technology

[0002] Foldable electronic devices have two states: closed and unfolded. Therefore, the antenna of these devices also corresponds to two different electromagnetic environments when the screen is closed and unfolded. Because foldable screens use a single flexible display, such as... Figure 1 As shown, when the screen is closed, the first non-bending area 11, the second non-bending area 12, and the bendable area 13 bend within the inner screen to form a U-shaped metal resonant cavity that is closed on one side and open on three sides. According to the principle of resonant cavities, this U-shaped cavity has certain resonant modes and will generate resonant modes in specific frequency bands, absorbing energy and thus affecting the antenna radiation characteristics.

[0003] Therefore, in the prior art, the resonant mode in the U-shaped cavity affects the antenna performance when the screen is closed. Summary of the Invention

[0004] The purpose of this application is to provide a touch display device and electronic device that can solve the problem that the resonant mode in the U-shaped cavity will affect the antenna performance.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a touch display device, comprising: a flexible display panel and a touch layer disposed on the flexible display panel; the touch layer includes a first region, on which a plurality of touch electrode groups spaced apart along a first direction are disposed, each of the touch electrode groups including a plurality of touch electrodes arranged sequentially along a second direction; two adjacent touch electrodes are connected by a switching unit.

[0007] An antenna feed point is provided on N of the multiple touch electrodes; N is a positive integer and N≥1;

[0008] The touch display device further includes:

[0009] A radio frequency integrated circuit, wherein the radio frequency integrated circuit is electrically connected to the antenna feed point;

[0010] A control circuit is connected to at least one of the switching units;

[0011] When the flexible display panel is in the unfolded state, the control circuit controls N first switch units to disconnect, and at least N first touch electrodes are spaced apart to form at least one antenna unit; wherein, the first switch unit is the switch unit located between the antenna unit and the second touch electrode, and the second touch electrode is the touch electrode adjacent to the antenna unit in the first direction;

[0012] When the flexible display panel is in a folded state, the control circuit controls the second switching unit to be turned on, and the N first touch electrodes are connected to the adjacent plurality of touch electrodes to form at least one antenna array; and the control circuit controls at least a portion of the third switching units in the first region to be turned off; wherein, the second switching unit is a switching unit that forms between each adjacent touch electrode in the antenna array, and the third switching unit is a switching unit located outside the antenna array.

[0013] Secondly, embodiments of this application provide an electronic device, including the touch display device as described in the first aspect.

[0014] In this embodiment, the touch display device includes: a flexible display panel and a touch layer disposed on the flexible display panel; the touch layer includes a first region, on which a plurality of touch electrode groups spaced apart along a first direction are disposed, each of the touch electrode groups including a plurality of touch electrodes arranged sequentially along a second direction; adjacent touch electrodes are connected by a switching unit; N first touch electrodes among the plurality of touch electrodes are provided with antenna feed points; N is a positive integer and N≥1; the radio frequency integrated circuit in the touch display device is electrically connected to the antenna feed points; the touch display device further includes a control circuit, which is connected to at least one switching unit. When the flexible display panel is in an unfolded state, the control circuit controls the N first switching units to disconnect, and the at least N first touch electrodes are spaced apart to form at least one antenna unit; wherein, the first switching unit is the switching unit located between the antenna unit and the second touch electrode, and the second touch electrode is the touch electrode adjacent to the antenna unit in the first direction. Since the touch layer does not form a U-shaped resonant cavity when the flexible display panel is in an unfolded state, it will not generate clutter frequencies that affect antenna performance. N first touch electrodes are spaced apart to form at least one antenna unit. The radiation direction of the antenna unit is perpendicular to the screen, that is, the 3dB beam range is concentrated at the top of the screen. Therefore, the maximum detection range coverage and the farthest detection distance can be obtained at the top of the screen. Since the user's gesture recognition and other operations are mainly performed in the area at the top of the screen when the screen is unfolded, it can bring a better user experience.

[0015] When the flexible display panel is in a folded state, the control circuit controls the second switching unit to be turned on, connecting the N first touch electrodes with adjacent touch electrodes to form at least one antenna array; and the control circuit controls at least a portion of the third switching units in the first region to be turned off; wherein, the second switching unit is a switching unit between each adjacent touch electrode forming the antenna array, and the third switching unit is a switching unit located outside the antenna array. Thus, when the flexible display panel is in a folded state, by controlling the partial deactivation of the third switching units, the structure of the U-shaped cavity can be disrupted, the resonant mode of the cavity can be adjusted, the resonant frequency can be shifted, and the resonant mode can be removed from the operating frequency band, thereby controlling the clutter within the U-shaped cavity and solving the problem that the resonant mode in the U-shaped cavity affects antenna performance.

[0016] In summary, the above analysis shows that the proposed solution not only solves the problem of the resonant mode in the U-shaped cavity affecting antenna performance in the folded state, but also integrates an under-display antenna, eliminating the need for an antenna layer on the touchscreen. Furthermore, it avoids introducing additional structures and components, does not affect the layout of existing terminal devices, and achieves functional reuse. Moreover, by controlling the connection and disconnection of touch electrodes in different areas when the screen is unfolded and folded, the antenna structure can be adjusted, thereby changing the antenna's radiation direction and causing the under-display antenna to radiate in different directions when the screen is unfolded and folded. In this way, the radiated radio waves from the antenna can be used for radar detection in both the unfolded and folded states, enabling gesture recognition. Attached Figure Description

[0017] Figure 1 A schematic diagram showing the structure of the U-shaped resonant cavity according to an embodiment of the present invention;

[0018] Figure 2 A schematic diagram showing the first region of an embodiment of the present invention;

[0019] Figure 3 A schematic diagram showing the unfolded state of the touch layer according to an embodiment of the present invention;

[0020] Figure 4 A schematic diagram showing the connection of the touch electrodes according to an embodiment of the present invention;

[0021] Figure 5 A schematic diagram illustrating the first touch electrode according to an embodiment of the present invention;

[0022] Figure 6 A schematic diagram showing the antenna feed point according to an embodiment of the present invention;

[0023] Figure 7 A schematic diagram illustrating the antenna array configuration of an embodiment of the present invention;

[0024] Figure 8 A schematic diagram illustrating the antenna array configuration of an embodiment of the present invention;

[0025] Figure 9 A schematic diagram showing the antenna feed point according to an embodiment of the present invention;

[0026] Figure 10 A schematic diagram showing the radiation pattern of the two antennas in the deployed state according to an embodiment of the present invention;

[0027] Figure 11 A schematic diagram showing the distribution of the first touch electrode according to an embodiment of the present invention;

[0028] Figure 12 This is a schematic diagram showing the radiation pattern of the under-screen antenna array in a folded state according to an embodiment of the present invention.

[0029] Figure 13 A schematic diagram illustrating the array configuration of the third antenna array according to an embodiment of the present invention;

[0030] Figure 14 This diagram illustrates the connection between the first touch electrode, the touch IC, and the radio frequency integrated circuit according to an embodiment of the present invention.

[0031] Figure 15 A schematic diagram showing the shape of the antenna element in an embodiment of the present invention;

[0032] Figure 16 A schematic diagram showing the shape of the antenna element in an embodiment of the present invention;

[0033] Figure 17 A schematic diagram showing the antenna feed point according to an embodiment of the present invention;

[0034] Figure 18 A schematic diagram showing the antenna feed point according to an embodiment of the present invention;

[0035] Figure 19 A flowchart illustrating the control method according to an embodiment of the present invention;

[0036] Figure 20 A schematic diagram showing the unfolded state of the touch layer according to an embodiment of the present invention;

[0037] Figure 21 This is a schematic diagram showing the folded state of the touch layer in an embodiment of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Touch layer; 11-First non-bendable area; 12-Second non-bendable area; 13-Bendable area; 2-Touch electrode group; 21-Touch electrode; 211-Antenna feed point; 22-Switch unit; 1a-First antenna array; 1b-Second antenna array. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0042] The control method provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0043] Please refer to Figures 2 to 18 This invention provides a touch display device, including: a flexible display panel and a touch layer 1 disposed on the flexible display panel; the touch layer 1 includes a first region, and a plurality of touch electrode groups 2 spaced apart along a first direction are disposed on the first region, each touch electrode group 2 including a plurality of touch electrodes 21 arranged sequentially along a second direction; two adjacent touch electrodes 21 are connected by a switching unit.

[0044] Antenna feed points are provided on N of the multiple touch electrodes 21, where N is a positive integer and N≥1;

[0045] The touch display device further includes:

[0046] A radio frequency integrated circuit, wherein the radio frequency integrated circuit is electrically connected to the antenna feed point;

[0047] The control circuit is connected to at least one switching unit.

[0048] in, Figure 2 and 3 The square shown is the touch electrode 21. These touch electrodes 21 are conductive layers with a certain degree of transparency, which can be indium tin oxide (ITO), metal mesh, nano silver, etc.

[0049] See Figure 2 It shows a schematic diagram of the first region. Figure 2The first region includes a plurality of touch electrode groups 2 arranged sequentially along a first direction. Each touch electrode group 2 includes touch electrodes 21 arranged sequentially along a second direction. Two adjacent touch electrodes 21 are connected by a switching unit 22.

[0050] For example, see Figure 3 The area outlined by the dashed line is the first region. Independent control circuits are loaded at the upper and lower ends of the touch electrode group 2. The switch unit is connected to the control circuit. The control circuit controls the switch unit to be turned on or off, so that the two adjacent touch electrodes 21 in the first region are in a connected or disconnected state.

[0051] Optionally, such as Figure 4 As shown, the switching unit 22 is a diode. The diodes in each touch electrode group 2 have the same polarity to ensure overall on / off control. For example... Figure 3 In this system, the switching on and off of each diode can be controlled, so that the touch electrodes 21 in each touch electrode group are either connected or disconnected.

[0052] For example, see Figure 5 The dashed circle indicates the three first touch electrodes, each with an antenna feed point. Figure 5 and Figure 6 The dot in the diagram represents antenna feed point 211, and the RF integrated circuit is electrically connected to antenna feed point 211. For example... Figure 6 In the middle, three antenna elements are arranged along the first direction, of which two antenna elements (such as...) Figure 6 Rx1 and Rx2 in the image are used for signal reception, and an antenna element (such as...) Figure 6 Tx1 in the code is used for signal transmission.

[0053] In the above embodiments, when the flexible display panel is in a folded state, the control circuit controls the partial switching unit to disconnect, which can destroy the structure of the U-shaped cavity, adjust the resonance mode of the cavity, cause the resonance frequency to shift, and remove the resonance mode from the working frequency band, thereby achieving the control of clutter in the U-shaped cavity and solving the problem that the resonance mode in the U-shaped cavity will affect the antenna performance.

[0054] Furthermore, by controlling the on and off states of the touch electrodes in different areas when the screen is unfolded and folded, the antenna structure can be adjusted, thereby changing the antenna's radiation direction. This allows the under-display antenna to radiate in different directions when the screen is unfolded and folded. In this way, the radiated radio waves from the antenna can be used for radar detection in both the unfolded and folded states, enabling gesture recognition.

[0055] As can be seen, the above embodiments can achieve clutter frequency modulation of the U-shaped resonant cavity in the folded form, and also integrate an under-screen antenna, eliminating the need to insert an antenna layer on the touch screen. At the same time, no additional structures or devices are introduced, and the existing terminal device layout is not affected, thus achieving functional reuse.

[0056] Specifically, when the flexible display panel is in the unfolded state, the control circuit controls N first switching units to disconnect, and at least N first touch electrodes are spaced apart to form at least one antenna unit; wherein, the first switching unit is the switching unit located between the antenna unit and the second touch electrode, and the second touch electrode is the touch electrode adjacent to the antenna unit in the first direction;

[0057] When the flexible display panel is in a folded state, the control circuit controls the second switching unit to be turned on, and the N first touch electrodes are connected to the adjacent plurality of touch electrodes 21 to form at least one antenna array; and the control circuit controls at least a portion of the third switching units in the first region to be turned off; wherein, the second switching unit is the switching unit that forms between each adjacent touch electrode 21 in the antenna array, and the third switching unit is the switching unit located outside the antenna array.

[0058] In a specific implementation, when the flexible display panel is in the unfolded state, the control circuit is used to send a first control signal to N first switching units. The first control signal is used to control the first switching units to turn off, and at least N first touch electrodes are spaced apart from each other to form at least one antenna unit. The first switching unit is the switching unit located between the antenna unit and the second touch electrode, and the second touch electrode is the touch electrode adjacent to the antenna unit in the first direction.

[0059] When the flexible display panel is in a folded state, the control circuit sends second control signals to a plurality of second switching units, the second control signals controlling the second switching units to be turned on, and N first touch electrodes are connected to a plurality of adjacent touch electrodes 21 to form at least one antenna array; and the control circuit sends third control signals to at least a portion of the third switching units in the first region, the third control signals controlling the third switching units to be turned off; wherein, the second switching units are switching units forming between each adjacent touch electrode 21 in the antenna array, and the third switching units are switching units located outside the antenna array.

[0060] In this embodiment, when the flexible display panel is in the unfolded state, the touch layer does not form a U-shaped resonant cavity, thus avoiding the generation of clutter frequencies that could affect antenna performance. At least N first touch electrodes are spaced apart to form at least one antenna element. In this case, the under-screen antenna is a typical patch antenna, with the antenna element's radiation direction perpendicular to the screen. This means the 3dB beam is concentrated directly above the screen, achieving maximum detection coverage and the longest detection distance directly above the screen. Since user gesture recognition and other operations are primarily performed in the area directly above the screen when the screen is unfolded, this provides a better user experience.

[0061] It should be noted that when the flexible display panel is in a folded state, the bendable area 13 is surrounded by upper and lower layers of ITO metal, and the antenna pattern perpendicular to the fold area is blocked by the surrounding metal, thus preventing radiation. This means that the under-screen antenna array in the unfolded state cannot achieve gesture recognition. To solve this problem, the above embodiment still uses N first touch electrodes for power supply when the flexible display panel is in a folded state, but the multiple touch electrodes 21 adjacent to the first touch electrodes are connected in series and arrayed. In this way, the radiation pattern changes from being perpendicular to the screen direction to being along the screen direction. Thus, even when the screen is closed, the radiation pattern of the under-screen antenna still achieves good outward radiation, and the user can continue to perform gesture recognition on the side of the screen.

[0062] Moreover, when the flexible display panel is in a folded state, the inner screen is not needed. Therefore, by controlling some of the switching units in the first area to be in an open state, the U-shaped resonant cavity can be disrupted, the resonant mode of the cavity can be adjusted, the resonant frequency can be shifted, and the resonant mode can be removed from the working frequency band, thereby controlling the noise in the U-shaped cavity.

[0063] In the above embodiments, by controlling different touch electrodes as under-screen antenna units in both the unfolded and closed states of the foldable screen terminal, different antenna radiation directions can be achieved in the unfolded and closed states, thus ensuring that the under-screen antenna functions normally in both the folded and closed states. Simultaneously, it can also avoid clutter interference generated by the U-shaped resonant cavity when the screen is closed, guaranteeing the antenna's radiation performance.

[0064] It should be noted that the first region may be located in the bendable region 13, or in the non-bendable region, or partly in the bendable region and partly in the non-bendable region. This application does not impose any restrictions and can be set according to actual needs.

[0065] In a preferred embodiment, the first region is the bendable region 13 of the flexible display panel; the bendable region 13 is connected between the first non-bendable region 11 and the second non-bendable region 12 of the flexible display panel.

[0066] In one specific embodiment, the N first touch electrodes are touch electrodes arranged on the first side and / or the second side near the first region;

[0067] The first side and the second side are located on different sides of the touch layer 1.

[0068] For example, such as Figure 7 , Figure 8 , Figure 11 and Figure 13 In the middle, N first touch electrodes are distributed close to the first and second sides of the bendable area 13. Figure 7 and Figure 8 It has two sets of antennas, one above the other (circled out by the dotted line), and two sets of millimeter-wave under-screen antennas are arranged at the top and bottom of the screen. This can achieve a wider coverage range, and the power consumption can be reduced by switching between the top and bottom antennas, thus improving the battery life of electronic devices.

[0069] in, Figure 7 and Figure 8 This shows different antenna element array configurations in the deployed state. Figure 7 The three first touch electrodes, circled by the two dashed lines, are distributed along the first direction; Figure 8 The four touch electrodes circled by the two dashed lines are the four first touch electrodes, roughly arranged in an L-shape; [This is in response to...] Figure 8 The array configuration, in which three antenna elements (such as...) Figure 9 Rx1, Rx2, and Rx3 are used for signal reception, and an antenna element (such as...) Figure 9 Tx1 in the code is used for signal transmission.

[0070] See Figure 10 It shows the radiation patterns of the two antennas in the deployed state, such as... Figure 10 In the middle, the two antenna patterns (elliptical dashed lines) formed by the two sets of antennas are perpendicular to the touch layer 1.

[0071] It should be pointed out that the above Figures 7 to 8 The antenna array configuration shown is merely an example and is not a limitation. While meeting the ranging and angle measurement principles of millimeter-wave radar, the specific array configuration of the antenna elements can be adjusted according to actual layout requirements.

[0072] In the above embodiments, when the screen is in the unfolded state, only the outermost first touch electrode of the screen is disconnected to form an under-screen antenna. At this time, the under-screen antenna is in the form of a typical patch antenna, and its radiation pattern is perpendicular to the antenna unit, that is, along the Z direction of the unfolded screen. The 3dB beam range of the antenna unit is concentrated directly above the screen, so the maximum detection range coverage and the farthest detection distance can be obtained directly above the screen.

[0073] Moreover, when the screen is unfolded, except for the first touch electrode at the under-screen antenna which is disconnected, the touch electrodes in other crease areas are normally connected to ensure the normal operation of the touch layer and reduce the impact on touch functionality.

[0074] In one specific embodiment, when the flexible display panel is in an unfolded state, the first region includes: a first antenna array and a second antenna array spaced apart from each other;

[0075] The first antenna array is located near the first side of the first region; the second antenna array is located near the second side of the first region; and the first and second sides are located on different sides of the touch layer.

[0076] like Figure 11 As shown, three first touch electrodes are distributed on the first side of the bendable region 13, and three first touch electrodes are distributed on the second side of the bendable region 13. Each first touch electrode is connected in series with three adjacent touch electrodes to form a series-fed antenna element. The three antenna elements are arranged along a first direction to form an antenna array. That is, the first antenna array 1a and the second antenna array 1b each include three antenna elements, and each antenna element includes four touch electrodes. The first antenna array 1a and the second antenna array 1b are fed through the first touch electrodes. The first antenna array 1a and the second antenna array 1b are disconnected from adjacent touch electrodes.

[0077] like Figure 12 As shown, two sets of series-fed millimeter-wave under-screen antenna arrays are formed in the bendable area 13. The radiation patterns of the two antenna arrays are along the screen direction. In this way, even when the screen is closed, the radiation pattern of the under-screen antennas can still achieve good outward radiation, and the user can continue to perform gesture recognition at the top and bottom of the screen.

[0078] In addition, such as Figure 11 In the bendable region 13, except for the first antenna array 1a and the second antenna array 1b, all switching units are in the off state. This disrupts the U-shaped resonant cavity formed in the folded state, adjusts the cavity's resonant mode, shifts the resonant frequency, and removes the resonant mode from the operating frequency band, thus controlling the clutter within the U-shaped resonant cavity. Therefore, when the screen is folded, the millimeter-wave under-screen antenna can operate normally while preventing clutter generated within the U-shaped resonant cavity from affecting the antenna's radiation performance.

[0079] Specifically, such as Figure 7 , Figure 8 and Figure 11 The two sets of millimeter-wave under-screen antennas formed in the middle can be distributed to form millimeter-wave antenna arrays M1 and M2 by cooperating with the corresponding software algorithms. The millimeter-wave antenna arrays can realize three-dimensional gesture recognition function.

[0080] In one specific embodiment, when the flexible display panel is in a folded state, the first region includes a third antenna array;

[0081] The third antenna array includes a first feed terminal and a second feed terminal; a portion of the N first touch electrodes are located at the first feed terminal, and another portion are located at the second feed terminal.

[0082] For example, such as Figure 13 As shown, the dotted frame within the bendable area 13 is the third antenna array. The series-fed antenna array, composed of three touch electrodes, causes the radiation pattern of the overall under-screen antenna to tilt downwards along the screen. When the screen is folded, its radiation pattern is not completely blocked by the screen. Therefore, when folded, the detection function of the under-screen antenna can still work normally on the top and bottom sides of the foldable screen electronic device. At the same time, since the inner screen does not need to work when the screen is folded, the detection function of the under-screen antenna can be turned on or off according to actual needs.

[0083] In one specific embodiment, all touch electrodes within the bendable region 13 are fed in series to form a fourth antenna array. A portion of the N first touch electrodes are located at the first feed end of the fourth antenna array, and another portion is located at the second feed end of the fourth antenna array.

[0084] In other words, the feeding method and antenna type of millimeter-wave under-screen antenna can be expanded. According to the actual needs of the screen, the antenna type and feeding method can be reasonably designed to expand the design feasibility of millimeter-wave antennas.

[0085] In one embodiment, the touch display device further includes a touch chip (IC) electrically connected to touch electrodes to receive touch signals.

[0086] In one embodiment, the first touch electrode is further provided with a connection point for the touch chip; the touch chip is connected to the connection point, so that the first touch electrode can be used as both a touch sensor and an antenna unit for radiating antenna waves.

[0087] In one specific embodiment, the touch chip connection point is close to a first side of the first touch electrode, the first side is adjacent to a second side of the first touch electrode, and the second side is close to the radio frequency integrated circuit.

[0088] like Figure 14 In this design, the connection point between the antenna feed point and the touch chip is located on the side adjacent to the first touch electrode. The touch signal has a low frequency, and the path length has little impact on touch performance. Moreover, the frequencies of the touch signal and the radio frequency signal differ significantly, so they can be considered to have no mutual influence. Even if there is some influence, it can be avoided through software algorithms.

[0089] Specifically, all traces connected to the first touch electrode are led to the bottom or top of the screen and bonded to the flexible printed circuit (FPC) using an anisotropic conductive film (ACF) bonding process with a temperature-viscosity set distribution curve. These traces on the FPC then connect to the pins of the touch IC and RF IC on the FPC using surface mount technology (SMT). The FPC has one or more connectors; the RF and touch circuits each use one connector or share a common connector. This connector connects to board-to-board connectors (BTB) on the motherboard to achieve the corresponding functions.

[0090] It should be noted that the shape of the antenna element is not limited to the square shape in the above embodiments, such as... Figure 15 and Figure 16 The image shows examples of other shapes with antenna elements, but is not limited to these.

[0091] In one specific embodiment, the antenna feed point is located close to the radio frequency integrated circuit.

[0092] As mentioned above Figure 7 , Figure 8 , Figure 11 and Figure 13 Each square in the design has an antenna feed point on its first touch electrode. The antenna feed point is connected to a radio frequency integrated circuit (RFIC), and the antenna feed point is close to the center of the lower edge of the square. This minimizes the path from the antenna feed point to the RFIC, thereby effectively reducing path loss and improving the antenna's radiation performance.

[0093] It should be noted that the location of the antenna element's feed point is not limited to the lower edge of the square in the above embodiments. For example... Figure 17 The center feed point is located at one of the corners of the square, such as... Figure 18 The antenna feed point is located near the center of the left edge of the square.

[0094] This invention also provides an electronic device, including the above-described touch display device.

[0095] Specifically, the electronic device further includes an angle sensor for detecting the extended state of the flexible display panel of the electronic device; wherein the extended state includes an unfolded state and a folded state.

[0096] In practice, the angle sensor detects the folding angle of the flexible display panel to determine its extended state and transmits this extended state to the control circuit, enabling the control circuit to determine control logic based on the extended state. For example, in one specific structure, the bendable area 13 of the flexible display panel is connected between the first non-bending area 11 and the second non-bending area 12 of the flexible display panel. When the angle between the first non-bending area 11 and the second non-bending area 12 is 0 degrees, the flexible display panel is determined to be in a folded state; when the angle between the first non-bending area 11 and the second non-bending area 12 is 180 degrees, the flexible display panel is determined to be in an unfolded state.

[0097] join Figure 19 This invention also provides a control method applied to the electronic device described above, the method comprising the following steps:

[0098] Step 101: Detect the extension state of the flexible display panel of the electronic device;

[0099] Step 102: When it is determined that the flexible display panel is in the unfolded state, the control circuit controls N first switch units to disconnect, and at least N first touch electrodes are spaced apart to form at least one antenna unit; wherein, the first switch unit is a switch unit located between the antenna unit and the second touch electrode, and the second touch electrode is a touch electrode adjacent to the antenna unit in the first direction;

[0100] Step 103: When it is determined that the extended state of the flexible display panel is in the folded state, the control circuit controls the second switching unit to be turned on, and the N first touch electrodes are connected with the adjacent plurality of touch electrodes 21 to form at least one antenna array; and the control circuit controls at least a portion of the third switching units in the first region to be turned off; wherein, the second switching unit is a switching unit that forms between each adjacent touch electrode 21 in the antenna array, and the third switching unit is a switching unit located outside the antenna array.

[0101] In this case, when the screen is in the unfolded and closed state, the on and off logic of the touch electrodes in the first area is set to two sets, and the folded and unfolded state of the screen is determined by the Hall device, so as to select the appropriate setting logic.

[0102] For example, such as Figure 20 In the case where the flexible display panel of the electronic device is in the unfolded state, two sets of under-screen antennas are distributed in regions c1 and c2, and regions c1 and c2 each include at least one first touch electrode.

[0103] For example, such as Figure 21In the case where the flexible display panel of the electronic device is in a folded state, two sets of under-screen antennas are distributed in regions c3 and c4, and regions c3 and c4 each include at least one series-fed antenna array.

[0104] In the above embodiments, by controlling the on and off of the touch electrodes in different areas when the screen is unfolded and folded, the antenna structure can be adjusted, thereby changing the antenna's radiation direction so that the under-screen antenna radiates in different directions when the screen is unfolded and folded. In this way, the radiated radio waves from the antenna can be used for radar detection in both the unfolded and folded states, enabling gesture recognition.

[0105] Especially when the flexible display panel is in a folded state, the control circuit can control the switching unit to disconnect, which can destroy the structure of the U-shaped cavity, adjust the resonance mode of the cavity, shift the resonance frequency, and remove the resonance mode from the working frequency band. This can achieve the control of clutter in the U-shaped cavity and solve the problem that the resonance mode in the U-shaped cavity will affect the antenna performance.

[0106] As can be seen, the above embodiments can achieve clutter frequency modulation of the U-shaped resonant cavity in the folded form, and also integrate an under-screen antenna, eliminating the need to insert an antenna layer on the touch screen. At the same time, no additional structures or devices are introduced, and the existing terminal device layout is not affected, thus achieving functional reuse.

[0107] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0108] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0109] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A touch display device, characterized in that, include: A flexible display panel and a touch layer disposed on the flexible display panel; the touch layer includes a first region, on which a plurality of touch electrode groups spaced apart along a first direction are disposed, each of the touch electrode groups including a plurality of touch electrodes arranged sequentially along a second direction; two adjacent touch electrodes are connected by a switching unit. An antenna feed point is provided on N of the N first touch electrodes of the plurality of touch electrodes; N is a positive integer, and N≥1; The touch display device further includes: A radio frequency integrated circuit, wherein the radio frequency integrated circuit is electrically connected to the antenna feed point; A control circuit is connected to at least one of the switching units; When the flexible display panel is in the unfolded state, the control circuit controls N first switch units to disconnect, and at least N first touch electrodes are spaced apart to form at least one antenna unit; wherein, the first switch unit is the switch unit located between the antenna unit and the second touch electrode, and the second touch electrode is the touch electrode adjacent to the antenna unit in the first direction; When the flexible display panel is in a folded state, the control circuit controls the second switching unit to be turned on, and the N first touch electrodes are connected to the adjacent plurality of touch electrodes to form at least one antenna array; and the control circuit controls at least a portion of the third switching units in the first region to be turned off; wherein, the second switching unit is the switching unit that forms between each adjacent touch electrode in the antenna array, and the third switching unit is the switching unit located outside the antenna array.

2. The touch display device according to claim 1, characterized in that, The first region is the bendable region of the flexible display panel; the bendable region is connected between the first non-bendable region and the second non-bendable region of the flexible display panel.

3. The touch display device according to claim 1, characterized in that, The N first touch electrodes are touch electrodes arranged on the first side and / or the second side close to the first region; The first side and the second side are located on different sides of the touch layer.

4. The touch display device according to claim 1, characterized in that, When the flexible display panel is in the unfolded state, the first region includes: a first antenna array and a second antenna array spaced apart from each other; Wherein, the first antenna array is close to the first side of the first region; the second antenna array is close to the second side of the first region; The first side and the second side are located on different sides of the touch layer.

5. The touch display device according to claim 1, characterized in that, When the flexible display panel is in a folded state, the first region includes a third antenna array; The third antenna array includes a first feed terminal and a second feed terminal; a portion of the N first touch electrodes are located at the first feed terminal, and another portion are located at the second feed terminal.

6. The touch display device according to claim 1, characterized in that, The antenna feed point is close to the radio frequency integrated circuit.

7. The touch display device according to claim 1, characterized in that, The first touch electrode is also provided with a touch chip connection point; The touch display device further includes: A touch chip, wherein the touch chip is electrically connected to the touch chip connection point.

8. The touch display device according to claim 7, characterized in that, The touch chip connection point is close to the first side of the first touch electrode, the first side is adjacent to the second side of the first touch electrode, and the second side is close to the radio frequency integrated circuit.

9. An electronic device, characterized in that, Includes the touch display device as described in any one of claims 1 to 8.

10. The electronic device according to claim 9, characterized in that, The electronic device also includes an angle sensor for detecting the extended state of the flexible display panel of the electronic device; wherein the extended state includes an unfolded state and a folded state.

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