Touch display devices and electronic devices

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 is provided with a plurality of electrode units arranged in an array; wherein, a portion of the plurality of electrode units is located in a first region of the touch layer, and another portion is located in a second region of the touch layer; the second region is located at the edge of the touch layer; in the first region, the electrode units arranged sequentially along a first direction are connected in sequence; in the second region, at least one of the electrode units is spaced apart to form at least one antenna unit; and the electrode unit in the second region is provided with an antenna feed point; the touch display device further includes: a radio frequency integrated circuit, the radio frequency integrated circuit being electrically connected to the antenna feed point.

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 modes in the U-shaped resonant cavity affect 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 in the prior art that the resonant mode in the U-shaped resonant cavity affects the antenna performance when the screen of a foldable screen electronic device is closed.

[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, including: a flexible display panel and a touch layer disposed on the flexible display panel; the touch layer is provided with a plurality of electrode units arranged in an array; wherein, a portion of the plurality of electrode units is located in a first region of the touch layer, and another portion is located in a second region of the touch layer; the second region is located at the edge of the touch layer;

[0007] In the first region, the electrode units arranged sequentially along the first direction are connected in sequence;

[0008] In the second region, at least one of the electrode units is spaced apart from each other to form at least one antenna unit; and an antenna feed point is provided on the electrode unit in the second region.

[0009] The touch display device further includes:

[0010] A radio frequency integrated circuit, which is electrically connected to the antenna feed point.

[0011] Secondly, embodiments of this application provide an electronic device, including the touch display device as described in the first aspect.

[0012] In this embodiment, the touch display device includes: a flexible display panel and a touch layer disposed on the flexible display panel; an array of multiple electrode units disposed on the touch layer; wherein a portion of the multiple electrode units is located in a first region of the touch layer, and another portion is located in a second region of the touch layer, the second region being located at the edge of the touch layer; in the first region, the multiple electrode units arranged sequentially along a first direction are connected in sequence; in the second region, at least one electrode unit is spaced apart to form at least one antenna unit; an antenna feed point is disposed on the electrode unit; and a radio frequency integrated circuit in the touch display device is electrically connected to the antenna feed point. Thus, by using the electrode units in the second region of the touch layer as antenna units, the size of some sidewalls of the U-shaped resonant cavity can be reduced, thereby changing the clutter frequency introduced by the U-shaped resonant cavity and tuning the clutter frequency introduced by the U-shaped resonant cavity to outside the antenna's operating frequency band, avoiding the problem of the resonant modes in the U-shaped resonant cavity affecting antenna performance. Moreover, in this embodiment, the electrode units located at the edge of the original screen touch layer are used as antenna units, so there is no need to insert an antenna layer on the touch screen. At the same time, no additional structures or devices are introduced, and the under-screen antenna is integrated without affecting the layout of the existing terminal devices. Attached Figure Description

[0013] Figure 1 A schematic diagram illustrating the U-shaped resonant cavity according to an embodiment of the present invention;

[0014] Figure 2 One of the schematic diagrams showing the unfolded state of the touch layer according to an embodiment of the present invention;

[0015] Figure 3 A second schematic diagram showing the unfolded state of the touch layer in an embodiment of the present invention;

[0016] Figure 4 One of the schematic diagrams illustrating an antenna element according to an embodiment of the present invention;

[0017] Figure 5 The third schematic diagram showing the unfolded state of the touch layer in an embodiment of the present invention;

[0018] Figure 6 Fourth schematic diagram showing the unfolded state of the touch layer in an embodiment of the present invention;

[0019] Figure 7 One of the schematic diagrams showing the folded state of the touch layer in an embodiment of the present invention;

[0020] Figure 8 Fifth schematic diagram illustrating the unfolded state of the touch layer in an embodiment of the present invention;

[0021] Figure 9The sixth schematic diagram illustrating the unfolded state of the touch layer in an embodiment of the present invention;

[0022] Figure 10 A second schematic diagram illustrating the folded state of the touch layer in an embodiment of the present invention;

[0023] Figure 11 The seventh schematic diagram showing the unfolded state of the touch layer in an embodiment of the present invention;

[0024] Figure 12 Eighth schematic diagram showing the unfolded state of the touch layer in an embodiment of the present invention;

[0025] Figure 13 The third schematic diagram illustrating the folded state of the touch layer in an embodiment of the present invention;

[0026] Figure 14 Schematic diagram nine illustrating the unfolded state of the touch layer in an embodiment of the present invention;

[0027] Figure 15 One of the schematic diagrams illustrating the second electrode unit according to an embodiment of the present invention;

[0028] Figure 16 A second schematic diagram illustrating the second electrode unit according to an embodiment of the present invention;

[0029] Figure 17 One of the schematic diagrams showing the antenna feed point according to an embodiment of the present invention;

[0030] Figure 18 A second schematic diagram illustrating the antenna feed point according to an embodiment of the present invention;

[0031] Figure 19 This is the third schematic diagram illustrating the second electrode unit in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Touch layer; 11-First non-bendable area; 12-Second non-bendable area; 13-Bendable area; 2-Touch electrode group; 21-Electrode unit; 22-Touch trace; a1-First sub-region; a2-Second sub-region; b1-Third sub-region; b3-Fourth sub-region; b2-Fifth sub-region; b4-Sixth sub-region; c1-Seventh sub-region; c2-Eighth sub-region; c3-Ninth sub-region; c4-Tenth sub-region. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] First, in conjunction with the appendix Figure 1 The principle of changing the resonant frequency in the U-shaped resonant cavity in this application is explained.

[0037] The electrode unit (touch sensor) in the touch layer is a conductive layer with a certain degree of transparency, such as indium tin oxide (ITO), metal mesh, or nano-silver.

[0038] like Figure 1 As shown, when the screen is folded, the touch layer inside the flexible screen bends to form a U-shaped metal resonant cavity with metal layers on the top and bottom, one side closed and three sides open, i.e., a U-shaped resonant cavity. The U-shaped resonant cavity can be considered a variation of a typical four-terminal short-circuit resonant cavity. Since the center of a typical short-circuit metal resonant cavity is at a zero current point, the surface current in the central region is equivalent to a virtual short circuit. Therefore, disconnecting from the central region has almost no impact on the resonant cavity's operating mode. For ease of description, this application refers to this type of resonant cavity as a U-shaped resonant cavity. When the operating mode (fundamental mode) of the U-shaped resonant cavity is excited, a resonant cavity mode with a specific resonant frequency is generated. If this resonant frequency falls within the antenna's operating frequency band, it will affect the antenna's radiation performance. Since the basic principle of this U-shaped resonant cavity is the same as that of the classic short-circuit resonant cavity, its method of controlling the resonant frequency is also consistent with that of the classic short-circuit resonant cavity.

[0039] The working principle of this application is: by changing the sidewall dimensions (such as the ITO dimensions) of the U-shaped metal resonant cavity, the resonant frequency generated by the U-shaped resonant cavity can be controlled. Specifically:

[0040] (1) According to the formula for the resonant frequency of a resonant cavity, for the base film (f) of a U-shaped resonant cavity 101 ) mode, in reducing edge a or edge L (e.g. Figure 1 When the length of the b-side is as shown, the frequency of the clutter generated by the resonant cavity shifts to a higher frequency (theoretically, the length of the b-side does not affect the resonant frequency).

[0041] (2) According to the formula for the resonant frequency of the resonant cavity, for the base film TE101 mode of the U-shaped resonant cavity, when the length of side a or side L is increased, the clutter frequency shifts to a higher frequency.

[0042] Specifically, the formula for the resonant frequency of the resonant cavity is:

[0043] in, f mnp f is the resonant frequency. 101 is the resonant frequency of the base film; c is the speed of light; a, b, l correspond as follows: Figure 1 The side length of the resonant cavity is shown; m, n, and p are used to represent the resonant modes; for example, in the TE101 base film mode, m = 1, n = 0, and p = 1.

[0044] Based on the above analysis, changing the length of side a or side L of the resonant cavity, or changing the lengths of both sides a and L simultaneously, can effectively change the clutter frequency of the resonant cavity.

[0045] 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.

[0046] Please refer to Figures 2 to 19 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 is provided with a plurality of electrode units 21 arranged in an array;

[0047] Among them, a portion of the plurality of electrode units 21 are located in the first region of the touch layer 1, and another portion are located in the second region of the touch layer 1; the second region is located at the edge of the touch layer 1;

[0048] In the first region, the electrode units 21 arranged sequentially along the first direction are connected in sequence;

[0049] In the second region, at least one electrode unit 21 is spaced apart from each other to form at least one antenna unit; and an antenna feed point is provided on the electrode unit 21 in the second region.

[0050] The touch display device also includes a radio frequency integrated circuit, which is electrically connected to the antenna feed point.

[0051] like Figure 2In the touch layer 1, multiple touch electrode groups 2 are arranged sequentially along a first direction. Each touch electrode group 2 includes electrode units 21 arranged sequentially along a second direction. Adjacent electrode units 21 are connected by touch traces 22. Optionally, a switch unit is connected between adjacent electrode units 21. The switch unit is connected to a control circuit, which controls the switch unit to be turned on or off. Specifically, the switch unit is a diode, and the diodes in each touch electrode group 2 have the same polarity.

[0052] like Figure 3 In the diagram, the area circled by the dashed line represents the second region of the touch layer 1, while the area outside the dashed line represents the first region. The first region includes multiple electrode units 21 arranged in an array, connected sequentially, with each touch electrode group 2 electrically connected to a touch chip (IC). The second region includes four electrode units 21, each with an antenna feed point, such as... Figure 4 The dots in the diagram represent antenna feed points, and the RF integrated circuit is electrically connected to the antenna feed points. Since the electrode unit 21 in the second region is used as the antenna unit, the under-screen antenna region (second region) partially cuts off the metal sidewall of the screen (such as ITO). By placing the second region at the edge of the touch layer 1, the impact on the screen display effect and touch experience can be minimized.

[0053] It should be noted that the impact of partially cutting off the screen's ITO on the screen display effect and touch experience can be optimized and compensated through algorithms.

[0054] join Figure 4 The four electrode units serve as four antenna units, which are roughly arranged in an "L" shape. Among them, three antenna units (such as...) Figure 4 Rx1, Rx2, and Rx3 are used for signal reception, and an antenna element (such as...) Figure 4 Tx1 in the code is used for signal transmission.

[0055] It should be pointed out that, Figure 4 The L-shaped antenna array formed by four electrode units is only an example. The specific number and arrangement of antenna units can be adjusted according to actual needs and are not limited thereto.

[0056] It should be noted that due to the size of the ITO in the foldable screen, the noise introduced by the U-shaped resonant cavity is typically in the low-frequency region, around 0.6-1 GHz. When the main resonant mode (fundamental mode f) of the U-shaped resonant cavity... 101 When the frequency of the antenna falls within the antenna's operating bandwidth, the touch ITO in the bent area of ​​the screen is partially cut off by the antenna area under the screen, which is equivalent to the sidewall of the resonant U-shaped cavity being cut off.

[0057] Moreover, when the screen is folded, since the inner screen does not need to work, the under-screen antenna area (second area) partially cuts off the screen's touch ITO, which can remove the noise generated by the resonant cavity from the antenna's operating frequency. In the unfolded state, since the under-screen antenna only cuts off part of the screen's ITO, the impact on the screen display effect and touch experience is limited and can be optimized and compensated through algorithms.

[0058] In the above embodiments, the electrode units located at the edge of the touch layer 1 are used as antenna units. In this way, the size of some metal sidewalls of the U-shaped resonant cavity can be reduced, thereby changing the clutter frequency brought by the U-shaped resonant cavity and adjusting the clutter frequency brought by the U-shaped resonant cavity to outside the antenna's operating frequency band, thus avoiding the problem of the resonant mode in the U-shaped resonant cavity affecting the antenna performance.

[0059] Moreover, this solution does not require inserting an antenna layer into the touchscreen, and it does not introduce any additional structures or components, thus not affecting the layout of existing terminal devices. Therefore, the embodiments of this application integrate an under-display antenna and also solve the problem of the resonant modes in the U-shaped resonant cavity affecting the antenna radiation performance.

[0060] In addition, by using some electrode units located at the edge of the touch layer as antenna units, antenna arrays can be formed based on the antenna units and applied to millimeter-wave communication to achieve high-speed, low-latency wireless communication. They can also be applied to millimeter-wave radar to achieve air gesture control.

[0061] In one embodiment of this application, the second region includes at least one sub-region, each sub-region including at least one of the antenna elements.

[0062] In this embodiment, the position of each sub-region in the touch layer 1 and the number of sub-regions included in the second region can be reasonably set according to the layout and quantity requirements of the under-screen antenna.

[0063] In one embodiment, the second region is located in 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.

[0064] It should be noted that the bendable region 13 corresponds to a high current point, and its impedance can be considered very small, approaching zero. Therefore, after cutting off the ITO in the bendable region 13 and placing the millimeter-wave under-screen antenna, the impedance characteristics of this region will significantly increase, with a large relative rate of change, and the surface current will decrease accordingly. Since a large portion of the efficiency dip caused by clutter is lost at the high current point, setting a second region in the bendable region 13 will further improve the efficiency dip at the clutter frequency point, thereby reducing the impact on the performance of the mobile phone's low-frequency antenna.

[0065] In one specific embodiment, the second region includes: a first sub-region and a second sub-region;

[0066] The first sub-region is close to the first side of the bendable region 13, and the second sub-region is close to the second side of the bendable region 13, with the first side and the second side opposite to each other.

[0067] like Figure 5 In the middle, the first sub-region a1 is close to the first side, and the second sub-region a2 is close to the second side. The first side and the second side are two opposite sides of the touch layer 1. The first sub-region a1 and the second sub-region a2 each include an antenna element formed by four second electrode units.

[0068] like Figure 6 and Figure 7 In the meantime, the first sub-region a1 and the second sub-region a2 located in the bendable region 13 are the antenna regions.

[0069] In the above embodiments, the positions of the first sub-region and the second sub-region are equivalent to the sidewall portion of the resonant U-shaped cavity ( Figure 1 The corresponding L-side of the U-shaped resonant cavity is cut off, effectively reducing its length. This causes the clutter frequency from the U-shaped resonant cavity to shift to higher frequencies, thus moving the clutter frequency out of the antenna's operating band. Simultaneously, cutting off part of the touch ITO in the curved area of ​​the screen also reduces the coupling area of ​​the original U-shaped resonant cavity formed by the ITO, thereby reducing the coupling capacitance. This allows higher frequency energy to pass through, causing the clutter frequency to continue shifting to higher frequencies. It should be noted that the primary reason for the clutter shifting to higher frequencies is the reduction in the length of the L-side of the U-shaped resonant cavity; the reduction in the coupling area of ​​the U-shaped resonant cavity is only a secondary factor.

[0070] It should also be noted that the clutter frequency can be further adjusted by controlling the length of the cut-off position (the size of the second region) according to actual needs. Specifically:

[0071] 1) When the main resonant mode (fundamental mode f) of the U-shaped resonant cavity 101 When the frequency of the signal falls on the lower end of the antenna's operating bandwidth, a larger frequency difference needs to be shifted to modulate the clutter to the higher frequency band outside the operating frequency. Therefore, the length of the cut-off position in the ITO bending region needs to be increased, i.e., the length of the L side needs to be reduced even more to achieve this.

[0072] 2) When the main resonant mode (fundamental mode f) of the foldable screen's own U-shaped resonant cavity... 101 When the frequency of the antenna falls on the high-frequency side of the antenna's operating bandwidth, only a small frequency difference needs to be moved to adjust the clutter to outside the high-frequency band of the operating frequency. Therefore, it is necessary to reduce the length of the cut-off position of the ITO bending region, that is, the length of the L side only needs to be reduced very little to achieve this.

[0073] Meanwhile, since the screen is in a folded state and the inner screen is not needed, cutting off part of the ITO will not have any additional impact on the touch experience.

[0074] In one embodiment, the second region is located in the first non-bending region 11 and the second non-bending region 12 of the flexible display panel, and a bendable region 13 is connected between the first non-bending region 11 and the second non-bending region 12.

[0075] In this embodiment, the second region is placed in the non-folded area (non-bending area) of the main screen, which is equivalent to reducing the length of the a-side of the resonant cavity by using the millimeter-wave under-screen antenna region, thereby achieving clutter frequency modulation.

[0076] In one specific embodiment, the second region includes: a third sub-region, a fourth sub-region, a fifth sub-region, and a sixth sub-region;

[0077] The third and fourth sub-regions are close to the third side of the first non-bending region 11; the fifth and sixth sub-regions are close to the fourth side of the second non-bending region 12; and the third and fourth sides are respectively opposite to the bendable region 13.

[0078] like Figure 8 In the middle, the third sub-region b1 and the fourth sub-region b3 are close to the third side of the first non-bending region 11, the third side is far away from the bendable region 13, and is opposite to the bendable region 13. The fifth sub-region b2 and the sixth sub-region b4 are close to the fourth side of the second non-bending region 12, the fourth side is far away from the bendable region 13, and is opposite to the bendable region 13.

[0079] like Figure 9 and Figure 10 In the first non-bending region 11, the third sub-region b1 and the fourth sub-region b3, as well as the fifth sub-region b2 and the sixth sub-region b4, are antenna regions. The antenna elements in each sub-region are roughly L-shaped.

[0080] In order for the antenna to function properly, a portion of the under-display antenna area (the second area) will cut off the touch ITO directly opposite the coupling area of ​​the screen, i.e. Figure 8 In this case, the second region is placed on the edge areas of both sides of the non-folded (non-bent) area of ​​the main screen, which is equivalent to the coupling surface of the U-shaped resonant cavity. Figure 1 The corresponding 'a' side is cut off, which is equivalent to partially reducing the length of the 'a' side of the U-shaped resonant cavity. This shifts the clutter frequency introduced by the U-shaped resonant cavity to a higher frequency, thus moving it out of the original antenna's operating band. In other words, it is equivalent to reducing the length of the 'a' side of the resonant cavity by utilizing the area of ​​the millimeter-wave under-screen antenna, which allows for the control of the clutter frequency introduced by the U-shaped resonant cavity while achieving the function of an under-screen antenna.

[0081] Meanwhile, the edge region of the non-bending region corresponds to the open circuit region of the electric field, that is, the zero point region of the current. Cutting the ITO trace in this edge region to build a millimeter-wave antenna can better change the original current distribution pattern of the cavity. The resulting impedance control effect will further suppress the loss caused by clutter, effectively improve the radiation efficiency, and thus improve the radiation efficiency of the low-frequency antenna.

[0082] It should be noted that changing the ITO length of the top and bottom folding areas of the main screen (corresponding to...) Figure 1 The length of side a in the U-shaped resonant cavity has a significant impact on the main operating mode of the U-shaped resonant cavity. In the above embodiment, when the under-screen antenna is placed in the upper and lower four edge areas of the touch layer 1, in order to make the under-screen antenna work normally, the ITO in the under-screen antenna area is cut off, thereby changing the length of side a of the U-shaped resonant cavity.

[0083] At the same time, cutting off part of the touch ITO at the edge of the touch layer 1 will also reduce the coupling area of ​​the U-shaped resonant cavity formed by the ITO, thereby reducing the coupling capacitance. This allows higher frequency energy to pass through, and the noise frequency will continue to move to higher frequencies.

[0084] Furthermore, the clutter can be further modulated by controlling the length of the cut-off position (the size of the second region) according to actual needs, as follows:

[0085] 1) When the main resonant mode (fundamental mode f) of the U-shaped resonant cavity 101 When the frequency of the signal falls on the lower end of the antenna's operating bandwidth, a large frequency difference needs to be shifted to modulate the clutter to the higher frequency band outside the operating frequency. Therefore, the length of the cut-off position of the ITO opposite the coupling region needs to be increased, that is, the length of side a needs to be reduced even more to achieve this.

[0086] 2) When the main resonant mode (fundamental mode f) of the foldable screen's own U-shaped resonant cavity... 101 When the frequency of the antenna falls on the high-frequency side of the antenna's operating bandwidth, only a small frequency difference needs to be moved to adjust the clutter to the outside of the high-frequency band of the operating frequency. Therefore, it is necessary to reduce the length of the cut-off position of the ITO opposite the coupling region. That is, the length of side a only needs to be reduced slightly to achieve clutter control.

[0087] At the same time, since the screen is in a folded state and the inner screen is not needed, cutting off part of the ITO will not bring any additional impact on the touch experience.

[0088] In one embodiment, the second region is partially located in the bendable area 13 of the flexible display panel and partially located in the non-bendable area of ​​the flexible display panel.

[0089] In this embodiment, by placing part of the antenna element of the millimeter-wave under-screen antenna in the bendable area and part in the non-bendable area, according to the theoretical analysis above, the area where the antenna element is placed will correspondingly cut off the ITO area. This is equivalent to changing the length of side a and side L of the U-shaped resonant cavity at the same time, realizing clutter control in two dimensions, which can more significantly move the frequency of clutter and increase the range of clutter control.

[0090] In one specific embodiment, the second region includes: a seventh sub-region, an eighth sub-region, a ninth sub-region, and a tenth sub-region;

[0091] The seventh and eighth sub-regions are close to the fifth side of the touch layer 1; the ninth and tenth sub-regions are close to the sixth side of the touch layer 1; and the fifth and sixth sides are opposite each other.

[0092] like Figures 11 to 13 In the middle, some antenna elements in the seventh sub-region c1 are located in the bendable region 13, and some antenna elements are located in the first non-bendable region 11; some antenna elements in the eighth sub-region c2 are located in the bendable region 13, and some antenna elements are located in the second non-bendable region 12; some antenna elements in the ninth sub-region c3 are located in the bendable region 13, and some antenna elements are located in the first non-bendable region 11; some antenna elements in the tenth sub-region c4 are located in the bendable region 13, and some antenna elements are located in the second non-bendable region 12. The fifth side includes the first side of the first non-bendable region 11, the bendable region 13, and the second non-bendable region 12, and the sixth side includes the second side of the first non-bendable region 11, the bendable region 13, and the second non-bendable region 12, with the first side opposite to the second side.

[0093] Meanwhile, the bendable region 13 and the adjacent bendable region 13 correspond to the short-circuit arm region of the ITO resonant cavity, where the current is strong. The impedance in this region can be considered very small, approaching zero. Therefore, after cutting off the ITO and placing the under-screen antenna in the bendable region 13 and the adjacent bendable region 13, the impedance characteristics in this region will significantly increase, with a large relative rate of change. Consequently, the surface current in this region will decrease accordingly. Since a large portion of the efficiency dip caused by clutter is lost through the current strong point, this can further improve the efficiency dip at the clutter frequency, thereby reducing the impact of clutter frequency on the radiation performance of the low-frequency antenna.

[0094] It should be noted that the above Figure 5 , Figure 8 , Figure 11 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.

[0095] Exemplarily, for Figure 8 the example shown, the arrangement form of the antenna units in each sub-region can be as Figure 14 shown. In the third sub-region b1, the fourth sub-region b3, the fifth sub-region b2, and the sixth sub-region b4, the four antenna units are approximately arranged in a "field" shape.

[0096] It should be noted that the shape of the antenna unit is not limited to the square in the above embodiments. For example, Figure 15 and Figure 16 show other examples of the shape of non-antenna units, but it is not limited thereto.

[0097] In one embodiment, the antenna feed point of the antenna unit is close to the radio frequency integrated circuit.

[0098] As described above Figure 5 、 Figure 8 、 Figure 11 On each square second electrode unit, an antenna feed point is provided. The antenna feed point is connected to a radio frequency integrated circuit (Radio Frequency Integrated Circuit, RFIC), and the antenna feed point is close to the center of the lower edge of the square, so that the path from the antenna feed point to the RFIC is the shortest, effectively reducing the path loss, and thus improving the radiation performance of the antenna.

[0099] It should be noted that the position of the feed point of the antenna unit is not limited to the lower edge of the square in the above embodiments. For example, Figure 17 the feed point is located at the corner of the square, and Figure 18 the antenna feed point is close to the center of the left edge of the square.

[0100] That is, the feeding form and antenna type of the millimeter-wave under-screen antenna can be expanded. According to the actual needs of the screen, the antenna type and feeding form can be reasonably designed to expand the design feasibility of the millimeter-wave antenna.

[0101] In one embodiment, the above touch display device further includes: a touch chip (IC), such as Figure 5 、 Figure 8 、 Figure 11 wherein the touch chip is electrically connected to the electrode unit 21 in the first region to receive touch signals.

[0102] In one embodiment, a contact point of the touch chip is further provided on the electrode unit in the second region; the touch chip is connected to the contact point. In this way, the electrode unit in the second region can be used both as a touch sensor and as an antenna unit for radiating antenna电波.

[0103] For example, Figure 19In this design, the antenna feed point and the contact point of the touch chip are located on the side adjacent to the electrode unit 21. The touch signal has a low frequency, and the path length has little impact on the touch performance. Moreover, the frequencies of the touch signal and the radio frequency signal are quite different, so it can be assumed that they do not interfere with each other. Even if there is some interference, it can be avoided through software algorithms.

[0104] Specifically, for electrode unit 21 in the second region, all traces connected to electrode unit 21 are led to the bottom or top of the screen and connected to the flexible printed circuit (FPC) via anisotropic conductive film (ACF) bonding process. The 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; RF and touch each use one connector or share a single connector. This connector connects to board-to-board connectors (BTB) on the motherboard to achieve the corresponding functions.

[0105] Furthermore, embodiments of this application also provide an electronic device, including the touch display device described above.

[0106] In this embodiment, by setting an under-screen antenna region in the touch layer, it is possible to change the clutter frequency of the resonant cavity by changing the length of side a or side L, or by changing both the lengths of side a and side L simultaneously. Thus, the clutter frequency of the resonant cavity can be controlled by utilizing the under-screen antenna region.

[0107] Moreover, this application is based on the foldable screen form and fully considers the working conditions in folding and closing scenarios. When the screen is in the folded state, the inner screen does not need to work. The touch ITO is cut off through the under-screen antenna, so that the noise is removed out of the band. When the screen is in the unfolded state, since the under-screen antenna only partially cuts off the screen's ITO, the impact on the screen display effect and touch experience is limited. It can be optimized and compensated through algorithms, so the touch experience is not affected.

[0108] In one embodiment, the electronic device further includes a millimeter-wave radar, which performs radar detection through an antenna unit in the touch display device. Thus, when the flexible display panel is in the unfolded state, gesture control of the electronic device can be achieved based on the antenna unit in the touch display device.

[0109] like Figure 5In the process, millimeter-wave radar M1 performs radar detection through the antenna elements in the first sub-region a1, and millimeter-wave radar M2 performs radar detection through the antenna elements in the second sub-region a2.

[0110] like Figure 8 In the middle, the millimeter-wave radar M1 can perform radar detection through the antenna elements in the third sub-region b1 and the fourth sub-region b3, and the millimeter-wave radar M2 can perform radar detection through the antenna elements in the fifth sub-region b2 and the sixth sub-region b4.

[0111] like Figure 11 In the middle, the millimeter-wave radar M1 can be detected by the antenna elements in the seventh sub-region c1 and the eighth sub-region c2, while the millimeter-wave radar M2 can be detected by the antenna elements in the ninth sub-region c3 and the tenth sub-region c4.

[0112] It should be noted that the scope of protection of this application includes, but is not limited to, the above-mentioned embodiments and their structural shape, size, orientation, position, implementation form and communication frequency band. Other applications and designs based on the fundamental thinking of this patent invention are all within the scope of protection of this patent.

[0113] 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.

[0114] 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.

[0115] 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, The touch display device comprises: a flexible display panel and a touch layer arranged on the flexible display panel; the touch layer is provided with a plurality of electrode units arranged in an array; wherein a part of the plurality of electrode units is located in a first region of the touch layer, and another part is located in a second region of the touch layer; the second region is located at the edge of the touch layer; in the first region, the electrode units arranged in a first direction are sequentially connected; in the second region, at least one of the electrode units is spaced apart to form at least one antenna unit; and the electrode units in the second region are provided with an antenna feed point; the touch display device further comprises: a radio frequency integrated circuit, which is electrically connected with the antenna feed point; wherein the second region is located in a bendable region of the flexible display panel; the bendable region is connected between a first non-bendable region and a second non-bendable region; or, the second region is located in the first non-bendable region and the second non-bendable region of the flexible display panel, and the bendable region is connected between the first non-bendable region and the second non-bendable region; or, the second region is partially located in the bendable region of the flexible display panel and partially located in the non-bendable region of the flexible display panel. 2.The touch display device of claim 1, wherein, The second region comprises at least one sub-region, and each sub-region comprises at least one antenna unit. 3.The touch display device of claim 1, wherein, In the case that the second region is located in the bendable region of the flexible display panel, the second region comprises a first sub-region and a second sub-region; wherein the first sub-region is close to a first side of the bendable region, and the second sub-region is close to a second side of the bendable region, and the first side is opposite to the second side. 4.The touch display device of claim 1, wherein, In the case that the second region is located in the first non-bendable region and the second non-bendable region of the flexible display panel, the second region comprises a third sub-region, a fourth sub-region, a fifth sub-region and a sixth sub-region; wherein the third sub-region and the fourth sub-region are close to a third side of the first non-bendable region; the fifth sub-region and the sixth sub-region are close to a fourth side of the second non-bendable region; and the third side and the fourth side are opposite to the bendable region, respectively.

5. The touch display device according to claim 1, wherein, In the case that the second region is partially located in the bendable region of the flexible display panel and partially located in the non-bendable region of the flexible display panel, the second region comprises a seventh sub-region, an eighth sub-region, a ninth sub-region and a tenth sub-region; wherein the seventh sub-region and the eighth sub-region are close to a fifth side of the touch layer; the ninth sub-region and the tenth sub-region are close to a sixth side of the touch layer; and the fifth side and the sixth side are opposite. 6.The touch display device of claim 1, wherein, The antenna feed point of the antenna unit is close to the radio frequency integrated circuit.

7. An electronic device, comprising: The touch display device comprises any one of claims 1 to 6. The touch display device comprises any one of claims 1 to 6.

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