Display device and driving method thereof

Abstract

A display device and a driving method thereof, the display device includes a substrate, a plurality of touch antenna units, and a plurality of switching circuits. The touch antenna units are arranged on the substrate, wherein each touch antenna unit includes a first loop electrode. The first loop electrode is entirely located in a display area of the display device and has a first end and a second end. Each switching circuit is electrically connected to the first end and the second end of the first loop electrode in the corresponding touch antenna unit.

Description

Technical Field

[0001] This invention relates to a display device and its driving method. Background Technology

[0002] With technological advancements, traditional display products that only display images can no longer meet consumer needs. Therefore, to enhance product competitiveness, many manufacturers are adding extra features. For example, current mobile phones often include touch functionality, fingerprint recognition, facial recognition, and wireless payment capabilities, offering consumers a more convenient lifestyle. Among these features, wireless payment has become one of the most popular in recent years. Consumers only need to carry a phone with Near-Field Communication (NFC) to easily complete shopping transactions at various stores, greatly improving convenience. Generally, in phones with both NFC and touch functionality, the antenna is attached to the outside of the touchscreen. However, the eddy current effect generated by the antenna can interfere with the touch signal within the touchscreen. Summary of the Invention

[0003] This invention provides a display device and its driving method. The display device of this invention integrates an antenna and a touch device, which not only improves the problem of interference between the antenna and the touch device but also reduces production costs.

[0004] At least one embodiment of the present invention provides a display device. The display device includes a substrate, a plurality of touch antenna units, and a plurality of switching circuits. The touch antenna units are arrayed on the substrate, wherein each touch antenna unit includes a first loop electrode. The first loop electrode is located entirely within the display area of ​​the display device and has a first end and a second end. Each switching circuit is electrically connected to the first end and the second end of the first loop electrode in the corresponding touch antenna unit.

[0005] At least one embodiment of the present invention provides a driving method for a display device, comprising the following steps: A display device is provided, comprising a substrate, a plurality of touch antenna units, and a plurality of switching circuits. The touch antenna units are arrayed on the substrate. Each touch antenna unit includes a first loop electrode and a second loop electrode. The first loop electrode is entirely located within the display area of ​​the display device and has a first end and a second end. The first loop electrode surrounds the second loop electrode, and the second loop electrode has a third end and a fourth end. Each switching circuit is electrically connected to the first end and the second end of the first loop electrode and the third end and the fourth end of the second loop electrode in the corresponding touch antenna unit. Each touch antenna unit includes a touch mode and an antenna mode. One of the touch antenna units and its corresponding switching circuit is switched to the touch mode, and another touch antenna unit and its corresponding switching circuit are switched to the antenna mode. Attached Figure Description

[0006] Figure 1 This is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0007] Figure 2A This is a top view of a touch device according to an embodiment of the present invention.

[0008] Figure 2B It is along Figure 2A A schematic diagram of the cross section of line A-A'.

[0009] Figure 3A This is a schematic diagram of a touch antenna unit and switching circuit in touch mode according to an embodiment of the present invention.

[0010] Figure 3B This is a schematic diagram of a touch antenna unit and switching circuit in antenna mode according to an embodiment of the present invention.

[0011] Figure 3C This is a schematic diagram of a touch antenna unit and switching circuit in interval mode according to an embodiment of the present invention.

[0012] Figure 4 This is a signal waveform diagram of a switching circuit according to an embodiment of the present invention.

[0013] Figure 5 This is a signal waveform diagram of a second signal line, a fourth signal line, and a sixth signal line according to an embodiment of the present invention.

[0014] Figure 6 This is a top view of a touch device according to an embodiment of the present invention.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1: Display device

[0017] 10, 10a: Touch device

[0018] 20: Display panel

[0019] 30: Backlight module

[0020] 100: Substrate

[0021] 110, 110a, 110b, 110c, 110d, 110e, 110f: Touch antenna units

[0022] 112: First loop electrode

[0023] 112a: First end

[0024] 112b: Second end

[0025] 114: Second loop electrode

[0026] 114a: Third end

[0027] 114b: Fourth end

[0028] 116: Third loop electrode

[0029] 116a: Fifth end

[0030] 116b: Sixth end

[0031] 200: Pixel array substrate

[0032] 202: First substrate

[0033] 204: Active Component Layer

[0034] 206: First polarizer

[0035] 210: Filter element substrate

[0036] 212: Second substrate

[0037] 214: Second polarizer

[0038] 230: LCD

[0039] 240: Sealing

[0040] A-A': line

[0041] BA: Border Area

[0042] C1, C2, C3, C4, C5, C6: Switching circuit

[0043] DA: Display Area

[0044] DE: Dummy Electrode

[0045] M: Metal mesh structure

[0046] PX: pixel

[0047] SL1: First signal line

[0048] SL2: Second signal line

[0049] SL3: Third signal line

[0050] SL4: Fourth signal line

[0051] SL5: Fifth signal line

[0052] SL6: Sixth signal line

[0053] SW1: First switch

[0054] SW2: Second switch

[0055] SW3: Third switch

[0056] SW4: Fourth Switch

[0057] SW5: Fifth Switch

[0058] SW6: Sixth Switch

[0059] SW7: Seventh Switch

[0060] SW8: Eighth Switch

[0061] SW9: Ninth Switch

[0062] SW10: Tenth Switch

[0063] SW11 Eleventh Switch

[0064] SW12: Twelfth Switch Detailed Implementation

[0065] Figure 1 This is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention. Please refer to... Figure 1 The display device 1 includes a touch device 10 and a display panel 20. In this embodiment, the display panel 20 is a liquid crystal display panel, and the display device 1 also includes a backlight module 30, but the present invention is not limited thereto. In other embodiments, the display panel 20 is an organic light-emitting diode display panel, a micro light-emitting diode display panel, a reflective liquid crystal display panel, or other suitable display panel, and the backlight module 30 may be omitted.

[0066] The touch device 10 includes a substrate 100 and a plurality of touch antenna units 110 located on the substrate 100. Figure 1 In the illustration, multiple touch antenna units 110 are simply represented by rectangles. The structure of the touch antenna unit 110 is described in the following figures and related descriptions. In some embodiments, the substrate 100 may be made of glass, quartz, organic polymer, or other suitable materials.

[0067] The display panel 20 includes a pixel array substrate 200, a filter element substrate 210, a liquid crystal 230, and an encapsulant 240. The pixel array substrate 200 includes a first substrate 202, an active element layer 204, and a first polarizer 206. The active element layer 204 and the first polarizer 206 are located on opposite sides of the first substrate 202. The filter element substrate 210 includes a second substrate 212, a second polarizer 214, and a filter element (not shown). The second polarizer 214 and the filter element are located on opposite sides of the second substrate 212. The liquid crystal 230 is located between the pixel array substrate 200 and the filter element substrate 210, and the encapsulant 240 surrounds the liquid crystal 230.

[0068] In this embodiment, the touch device 10 is an out-cell touch device, and the substrate 100 of the touch device 10 is attached to the display panel 20 via an adhesive layer (not shown). In other embodiments, the touch device is an on-cell or in-cell touch device, in which case the touch antenna unit 110 can be directly formed on or within the display panel 20, and the substrate 100 can be omitted. In other words, in other embodiments, the touch antenna unit is formed on the pixel array substrate 200 or the filter element substrate 210.

[0069] In this embodiment, the display device 1 includes a display area DA and a border area BA. For example, the area inside the sealant 240 is the display area DA, while the area outside the sealant 240 is the border area BA. Multiple pixels PX are disposed in the display area DA. Touch antenna units 110 are also located in the display area DA, and each touch antenna unit 110 overlaps with multiple pixels PX.

[0070] Figure 2A This is a top view of a touch device according to an embodiment of the present invention. Figure 2B It is along Figure 2A A cross-sectional diagram of line A-A'. It must be noted here that... Figure 2A and Figure 2B The embodiments follow Figure 1 The component reference numerals and partial contents of the embodiments are described below, wherein the same or similar reference numerals are used to represent the same or similar components, and descriptions of the same technical content are omitted. For explanations of the omitted parts, please refer to the foregoing embodiments, and will not be repeated here.

[0071] Please refer to Figure 2A and Figure 2B The touch device 10 includes a substrate 100 and touch antenna units 110a, 110b, and 110c located on the substrate 100. In some embodiments, the touch device 10 further includes a dummy electrode DE.

[0072] Touch antenna units 110a, 110b, and 110c are arrayed on substrate 100, wherein touch antenna unit 110b is located between touch antenna units 110a and 110c.

[0073] Touch antenna units 110a, 110b, and 110c each include a first loop electrode 112, a second loop electrode 114, and a third loop electrode 116. The first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 are all located entirely within the display area of ​​the display device (see reference). Figure 1 In the display area, the first loop electrode 112 surrounds the second loop electrode 114, and the second loop electrode 114 surrounds the third loop electrode 116. In some embodiments, the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 each overlap a plurality of pixels in the display area (see reference). Figure 1 ).

[0074] The dummy electrode DE is located between the first loop electrode 112 and the second loop electrode 114, between the second loop electrode 114 and the third loop electrode 116, in the middle of the third loop electrode 116, and between adjacent touch antenna units 110a, 110b, and 110c. In some embodiments, the dummy electrode DE is at least partially located in the display area of ​​the display device (see reference). Figure 1 )middle.

[0075] In some embodiments, the first loop electrode 112, the second loop electrode 114, the third loop electrode 116, and the dummy electrode DE are separate metal meshes. For example, the separate first loop electrode 112, the second loop electrode 114, the third loop electrode 116, and the dummy electrode DE are obtained by defining multiple segmented channels on the metal mesh structure M. Figure 2A In the metal mesh structure M, the thicker lines are the dividing lines used to separate the first loop electrode 112, the second loop electrode 114, the third loop electrode 116, and the dummy electrode DE. It should be noted that... Figure 2A The metal mesh structure M shown is for illustrative purposes only. The mesh size and line width of the metal mesh structure M can be adjusted according to actual needs.

[0076] Each switching circuit C1, C2, and C3 is electrically connected to the corresponding touch antenna units 110a, 110b, and 110c. In this embodiment, switching circuits C1, C2, and C3 are electrically connected to touch antenna units 110a, 110b, and 110c, respectively. Each switching circuit C1, C2, and C3 is electrically connected to the first end 112a and the second end 112b of the corresponding first loop electrode 112, the third end 114a and the fourth end 114b of the corresponding second loop electrode 114, and the fifth end 116a and the sixth end 116b of the corresponding third loop electrode 116. In this embodiment, the first end 112a and the second end 112b of the first loop electrode 112, the third end 114a and the fourth end 114b of the second loop electrode 114, and the fifth end 116a and the sixth end 116b of the third loop electrode 116 are all located on the same side. Figure 2A (The lower side of the metal mesh structure M) Therefore, the wiring space between the touch antenna units 110a, 110b, 110c and the switching circuits C1, C2, C3 can be reduced to obtain the advantage of a narrow bezel.

[0077] In this embodiment, the switching circuits C1, C2, and C3 are located in the bezel area of ​​the display device (please refer to...). Figure 1 In some embodiments, the switching circuits C1, C2, and C3 can be directly formed on the substrate 100. In other embodiments, the switching circuits C1, C2, and C3 are disposed in a chip (not shown) or circuit board (not shown) externally connected to the substrate 100.

[0078] In this embodiment, switching circuits C1, C2, and C3 can independently switch the touch antenna units 110a, 110b, and 110c to touch mode (see reference). Figure 3A Antenna mode (please refer to) Figure 3B ) and interval mode (please refer to) Figure 3C Switching is performed between these circuits. Switching circuits C1, C2, and C3 have similar circuit structures. Figures 3A to 3C The various modes of the touch antenna unit and switching circuit are illustrated using touch antenna unit 110a and switching circuit C1 as examples. For information on the various modes of switching circuits C2 and C3, and touch antenna units 110b and 110c, please refer to [reference needed]. Figures 3A to 3C The switching circuit C1 and the touch antenna unit 110a will not be described in detail here.

[0079] Figure 3A This is a schematic diagram of a touch antenna unit and switching circuit in touch mode according to an embodiment of the present invention. Figure 3AIn the diagram, the switching circuit C1 includes a first switch SW1 to a twelfth switch SW12, and is electrically connected to a first signal line SL1, a second signal line SL2, a third signal line SL3, a fourth signal line SL4, a fifth signal line SL5, and a sixth signal line SL6. In the accompanying drawings, switches in the "on state" are indicated by a slash, allowing current to flow; switches not indicated by a slash are in the "off state," preventing current from flowing through them.

[0080] The first signal line SL1 is electrically connected to the first terminal 112a of the first loop electrode 112.

[0081] One end of the first switch SW1 and one end of the third switch SW3 are electrically connected to the second end 112b of the corresponding first loop electrode 112, and the other end of the first switch SW1 is electrically connected to the second signal line SL2.

[0082] One end of the fourth switch SW4 and one end of the sixth switch SW6 are electrically connected to the fourth end 114b of the corresponding second loop electrode 114.

[0083] The other end of the third switch SW3 is electrically connected to one end of the second switch SW2, one end of the fifth switch SW5, and the other end of the fourth switch SW4, and the other end of the second switch SW2 is electrically connected to the fourth signal line SL4.

[0084] The sixth signal line SL6 is electrically connected to the sixth terminal 116b of the third loop electrode 116.

[0085] The other end of the fifth switch SW5 is electrically connected to one end of the seventh switch SW7. The other end of the sixth switch SW6 is electrically connected to one end of the eighth switch SW8.

[0086] The other end of the eighth switch SW8 and one end of the tenth switch SW10 are electrically connected to the fifth end 116a of the corresponding third loop electrode 116.

[0087] The other end of the tenth switch SW10 is electrically connected to one end of the ninth switch SW9, one end of the eleventh switch SW11, and the other end of the seventh switch SW7, and the other end of the ninth switch SW9 is electrically connected to the fifth signal line SL5.

[0088] The other end of the eleventh switch SW11 and one end of the twelfth switch SW12 are electrically connected to the third end 114a of the corresponding second loop electrode 114, and the other end of the twelfth switch SW12 is electrically connected to the third signal line SL3.

[0089] In touch mode, switch SW1, SW2, SW4, SW9, SW10 and SW12 to the on state, and switch SW3, SW5, SW6, SW7, SW8 and SW11 to the off state.

[0090] In touch mode, the first end 112a of the first loop electrode 112 is electrically connected to the first signal line SL1 via a corresponding switching circuit C1. The second end 112b of the first loop electrode 112 is electrically connected to the second signal line SL2 via the corresponding switching circuit C1. The first signal line SL1 is electrically connected to the second signal line SL2 via the switching circuit C1 and the first loop electrode 112. In some embodiments, in touch mode, the first signal line SL1 and the second signal line SL2 are adapted to transmit and / or receive touch signals. In some embodiments, in touch mode, the second signal line SL2 is electrically connected to the operating voltage, while the first signal line SL1 is electrically connected to the ground voltage.

[0091] In touch mode, the third terminal 114a of the second loop electrode 114 is electrically connected to the third signal line SL3 via a corresponding switching circuit C1. The fourth terminal 114b of the second loop electrode 114 is electrically connected to the fourth signal line SL4 via a corresponding switching circuit C1. The third signal line SL3 is electrically connected to the fourth signal line SL4 via the switching circuit C1 and the second loop electrode 114. In some embodiments, in touch mode, the third signal line SL3 and the fourth signal line SL4 are adapted to transmit and / or receive touch signals. In some embodiments, in touch mode, the fourth signal line SL4 is electrically connected to the operating voltage, while the third signal line SL3 is electrically connected to the ground voltage.

[0092] In touch mode, the fifth terminal 116a of the third loop electrode 116 is electrically connected to the fifth signal line SL5 through the corresponding switching circuit C1, and the sixth terminal 116b of the third loop electrode 116 is electrically connected to the sixth signal line SL6 through the corresponding switching circuit C1. The fifth signal line SL5 is electrically connected to the sixth signal line SL6 through the switching circuit C1 and the third loop electrode 116. In some embodiments, in touch mode, the fifth signal line SL5 and the sixth signal line SL6 are adapted to transmit and / or receive touch signals. In some embodiments, in touch mode, the sixth signal line SL6 is electrically connected to the operating voltage, while the fifth signal line SL5 is electrically connected to the ground voltage.

[0093] In touch mode, the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 can serve as independent and separate touch electrodes. For example, the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 can all serve as touch electrodes for a self-contained touch device.

[0094] Figure 3B This is a schematic diagram of a touch antenna unit and switching circuit in antenna mode according to an embodiment of the present invention.

[0095] In antenna mode, switch the third switch SW3, the fifth switch SW5, the sixth switch SW6, the seventh switch SW7, the eighth switch SW8, and the eleventh switch SW11 to the on state, and switch the first switch SW1, the second switch SW2, the fourth switch SW4, the ninth switch SW9, the tenth switch SW10, and the twelfth switch SW12 to the off state.

[0096] In antenna mode, the first terminal 112a of the first loop electrode 112 is electrically connected to the first signal line SL1 via a corresponding switching circuit C1. The second terminal 112b of the first loop electrode 112 is electrically connected to the third terminal 114a of the second loop electrode 114 via a corresponding switching circuit C1. The fourth terminal 114b of the second loop electrode 114 is electrically connected to the fifth terminal 116a of the third loop electrode 116 via a corresponding switching circuit C1, and the sixth terminal 116b of the third loop electrode 116 is electrically connected to the sixth signal line SL6 via a corresponding switching circuit C1. In some embodiments, in antenna mode, the first signal line SL1 and the sixth signal line SL6 are adapted to transmit and / or receive antenna signals. In some embodiments, in antenna mode, the sixth signal line SL6 and the first signal line SL1 are electrically connected to the operating voltage and operate in AC mode.

[0097] In antenna mode, the second signal line SL2, the third signal line SL3, the fourth signal line SL4, and the fifth signal line SL5 are not directly electrically coupled to the touch antenna unit 110a. In antenna mode, the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 can function as antennas electrically connected to each other. For example, the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 can function as near-field communication (NFC) antennas and can provide high-frequency signals.

[0098] Figure 3C This is a schematic diagram of a touch antenna unit and switching circuit in interval mode according to an embodiment of the present invention.

[0099] In the spaced-out mode, the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 are either floating or electrically connected to ground. For example, in... Figure 3C In the process, the first switch SW1 to the twelfth switch SW12 are all switched to the closed state. In the interval mode, the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 do not form a complete circuit loop and are floating.

[0100] In other embodiments, the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 are electrically connected to ground by adjusting the signals on the first signal line SL1 to the sixth signal line SL6. For example, in other embodiments, the first switch SW1 to the twelfth switch SW12 have the same state in both the interval mode and the touch mode (i.e., the first switch SW1, the second switch SW2, the fourth switch SW4, the ninth switch SW9, the tenth switch SW10, and the twelfth switch SW12 are switched to the on state, and the third switch SW3, the fifth switch SW5, the sixth switch SW6, the seventh switch SW7, the eighth switch SW8, and the eleventh switch SW11 are switched to the off state). At the same time, a ground voltage (or 0V) is applied to all the first signal lines SL1 to the sixth signal line SL6 so that no current flows through the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116.

[0101] In other embodiments, the first switches SW1 to the twelfth switches SW12 have the same state in both the spacing mode and the antenna mode (i.e., the third switch SW3, the fifth switch SW5, the sixth switch SW6, the seventh switch SW7, the eighth switch SW8, and the eleventh switch SW11 are switched to the on state, and the first switch SW1, the second switch SW2, the fourth switch SW4, the ninth switch SW9, the tenth switch SW10, and the twelfth switch SW12 are switched to the off state). Simultaneously, a ground voltage is applied to the first signal line SL1 and the sixth signal line SL6 to prevent current from flowing through the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116.

[0102] Figure 4 This is a signal waveform diagram of a switching circuit according to an embodiment of the present invention. Figure 4 In this system, the switch is in the open state when under high voltage and in the closed state when under low voltage. For example, the first switch SW1 to the twelfth switch SW12 are transistors, while... Figure 4 This displays the gate voltage of the transistor. When the gate voltage is high, the transistor is in the on state; when the gate voltage is low, the transistor is in the off state.

[0103] Please refer to Figure 3A , Figure 3B as well as Figure 4 By adjusting the opening or closing of the first switch SW1 to the twelfth switch SW12, the touch antenna unit and the corresponding switching circuit can be switched between touch mode TP and antenna mode NFC.

[0104] Figure 5 This is a signal waveform diagram of a second signal line SL2, a fourth signal line SL4, and a sixth signal line SL6 according to an embodiment of the present invention. Please also refer to... Figure 3A , Figure 4 and Figure 5 During the touch mode TP, signals are provided to the second signal line SL2, the fourth signal line SL4, and the sixth signal line SL6, respectively.

[0105] Please return to Figure 2A In some embodiments, one or more touch antenna units and their corresponding one or more switching circuits are switched to touch mode, and another or more touch antenna units and their corresponding other or more switching circuits are switched to antenna mode.

[0106] For example, within the same frame, touch antenna unit 110a and switching circuit C1 are switched to touch mode, while touch antenna unit 110c and switching circuit C3 are switched to antenna mode. To avoid interference between touch signals and antenna signals within the same frame, touch antenna unit 110b and switching circuit C2 are switched to interval mode, thereby ensuring that touch antenna unit 110a in touch mode is not adjacent to touch antenna unit 110c in antenna mode.

[0107] In other embodiments, within the same frame, touch antenna units 110a, 110b, 110c and switching circuits C1, C2, C3 are all switched to touch mode, and in the next frame, touch antenna units 110a, 110b, 110c and switching circuits C1, C2, C3 are all switched to antenna mode. In some embodiments, within the same frame, touch antenna units 110a, 110c and switching circuits C1, C3 are all switched to antenna mode, while touch antenna unit 110b and switching circuit C2 are switched to spacing mode, thereby ensuring that touch antenna units 110a and 110c in antenna mode are not adjacent to each other, thus reducing mutual interference between antenna signals.

[0108] In some embodiments, the touch antenna units 110a, 110b, 110c and the switching circuits C1, C3, C3 switch between touch mode, interval mode and antenna mode, thereby enabling each touch antenna unit of the touch device 10 to have touch function and antenna function.

[0109] Figure 6 This is a top view of a touch device according to an embodiment of the present invention. It should be noted that... Figure 6 The embodiments follow Figure 2A and Figure 2B The component reference numerals and partial contents of the embodiments are described below, wherein the same or similar reference numerals are used to represent the same or similar components, and descriptions of the same technical content are omitted. For explanations of the omitted parts, please refer to the foregoing embodiments, and will not be repeated here.

[0110] Figure 6 The touch device 10a and Figure 2A The difference of the touch device 10 is that the touch device 10a includes six touch antenna units 110a, 110b, 110c, 110d, 110e, 110f and six switching circuits C1, C2, C3, C4, C5, C6.

[0111] Please refer to Figure 6 The touch antenna units 110a, 110b, 110c, 110d, 110e, and 110f are electrically connected to the switching circuits C1, C2, C3, C4, C5, and C6, respectively.

[0112] In this embodiment, the endpoints of the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 of the touch antenna units 110a, 110b, and 110c are all located on the same side (e.g., Figure 6 On the lower side of the metal mesh structure M, the endpoints of the first loop electrode 112, the second loop electrode 114, and the third loop electrode 116 of the touch antenna units 110d, 110e, and 110f are all located on the same side (e.g., on the lower side of the metal mesh structure M). Figure 6 The upper side of the metal mesh structure M can reduce the wiring space between the touch antenna units 110a, 110b, 110c and the switching circuits C1, C2, C3, as well as the wiring space between the touch antenna units 110d, 110e, 110f and the switching circuits C4, C5, C6, thus achieving the advantage of a narrow bezel.

[0113] In some embodiments, within the same frame, the touch antenna units of the first portion are switched to touch mode, the touch antenna units of the second portion are switched to antenna mode, and the touch antenna units of the third portion are switched to spacing mode. The touch antenna units of the first portion are not adjacent to the touch antenna units of the second portion. For example, touch antenna units 110a and 110c and switching circuits C1 and C3 are switched to touch mode, touch antenna unit 110e and switching circuit C5 are switched to antenna mode, and touch antenna units 110b, 110d, and 110f and switching circuits C2, C4, and C5 are switched to spacing mode.

[0114] In other embodiments, within the same frame, touch antenna unit 110f and switching circuit C6 are switched to touch mode, touch antenna unit 110a and switching circuit C1 are switched to antenna mode, and touch antenna units 110b, 110c, 110d, 110e and switching circuits C2, C3, C4, C5 are switched to interval mode.

[0115] In other embodiments, in the same frame, the touch antenna units 110a, 110b, 110c, 110d, 110e, 110f and the switching circuits C1, C2, C3, C4, C5, and C6 are all switched to touch mode, and in the next frame, the touch antenna units 110a, 110b, 110c, 110d, 110e, 110f and the switching circuits C1, C2, C3, C4, C5, and C6 are all switched to antenna mode.

[0116] In summary, the display device of the present invention includes multiple touch antenna units, each of which has both antenna and touch functions. Therefore, in addition to reducing the manufacturing cost of the device, it also solves the problem of mutual interference between antenna signals and touch signals.

Claims

1. A display device, comprising: a substrate; a plurality of touch antenna units arranged on the substrate, wherein each of the touch antenna units comprises: a first loop electrode entirely located in a display area of the display device and having a first end and a second end; and a plurality of switching circuits, each of the switching circuits electrically connected to the first end and the second end of the first loop electrode in a corresponding one of the touch antenna units, wherein each of the touch antenna units further comprises: a second loop electrode, wherein the first loop electrode surrounds the second loop electrode, and the second loop electrode has a third end and a fourth end, and the switching circuits are electrically connected to the third end and the fourth end of the second loop electrode in a corresponding one of the touch antenna units, respectively, wherein each of the touch antenna units and the corresponding switching circuits comprises a touch mode and an antenna mode, wherein: in the touch mode, the first end of the first loop electrode is electrically connected to a first signal line through the corresponding switching circuit, the second end of the first loop electrode is electrically connected to a second signal line through the corresponding switching circuit, the third end of the second loop electrode is electrically connected to a third signal line through the corresponding switching circuit, and the fourth end of the second loop electrode is electrically connected to a fourth signal line through the corresponding switching circuit; and in the antenna mode, the first end of the first loop electrode is electrically connected to the first signal line through the corresponding switching circuit, and the second end of the first loop electrode is electrically connected to the third end of the second loop electrode through the corresponding switching circuit, wherein each of the touch antenna units and the corresponding switching circuits further comprises a gap mode, wherein in the gap mode, the first loop electrode and the second loop electrode are floating or electrically connected to a ground voltage. 2.The display device of claim 1, further comprising: a plurality of dummy electrodes located between the first loop electrodes and the second loop electrodes. 3.The display device of claim 1, wherein each of the touch antenna units further comprises: a third loop electrode, wherein the second loop electrode surrounds the third loop electrode, and the third loop electrode has a fifth end and a sixth end, and the switching circuits are electrically connected to the fifth end and the sixth end of the third loop electrode in a corresponding one of the touch antenna units, respectively. 4.The display device of claim 3, wherein: in the touch mode, the fifth end of the third loop electrode is electrically connected to a fifth signal line through the corresponding switching circuit, and the sixth end of the third loop electrode is electrically connected to a sixth signal line through the corresponding switching circuit; and in the antenna mode, the fourth end of the second loop electrode is electrically connected to the fifth end of the third loop electrode through the corresponding switching circuit, and the sixth end of the third loop electrode is electrically connected to the sixth signal line through the corresponding switching circuit.

5. The display device of claim 4, wherein each of the switching circuits comprises a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, and a twelfth switch, wherein: one end of the first switch and one end of the third switch are electrically connected to the second end of the corresponding first loop electrode, and the other end of the first switch is electrically connected to the second signal line; one end of the fourth switch and one end of the sixth switch are electrically connected to the fourth end of the corresponding second loop electrode; the other end of the third switch is electrically connected to one end of the second switch, one end of the fifth switch, and the other end of the fourth switch, and the other end of the second switch is electrically connected to the fourth signal line; the other end of the fifth switch is electrically connected to one end of the seventh switch; the other end of the sixth switch is electrically connected to one end of the eighth switch; the other end of the eighth switch and one end of the tenth switch are electrically connected to the fifth end of the corresponding third loop electrode; the other end of the tenth switch is electrically connected to one end of the ninth switch, one end of the eleventh switch, and the other end of the seventh switch, and the other end of the ninth switch is electrically connected to the fifth signal line; the other end of the eleventh switch and one end of the twelfth switch are electrically connected to the third end of the corresponding second loop electrode, and the other end of the twelfth switch is electrically connected to the third signal line.

6. The display device of claim 1, wherein the first loop electrode comprises a metal mesh.

7. The display device of claim 1, wherein the switching circuits are located in a bezel region of the display device.

8. The display device of claim 1, wherein the switching circuits are disposed in a chip or a circuit board.

9. The display device of claim 1, further comprising: a liquid crystal panel, wherein the substrate is attached to the liquid crystal panel.

10. The display device of claim 1, wherein the first loop electrode overlaps a plurality of pixels in the display region.

11. A method of driving a display device, comprising: providing a display device, the display device comprising: a substrate; a plurality of touch antenna units arrayed over the substrate, wherein each of the touch antenna units comprises: a first loop electrode entirely located in a display region of the display device, and having a first end and a second end; and a second loop electrode, wherein the first loop electrode surrounds the second loop electrode, and the second loop electrode has a third end and a fourth end; and a plurality of switching circuits, each of the switching circuits electrically connected to the first end and the second end of the first loop electrode and the third end and the fourth end of the second loop electrode in a corresponding one of the touch antenna units, wherein each of the touch antenna units and the corresponding switching circuit comprises a touch mode and an antenna mode; switching one of the touch antenna units and the corresponding switching circuit to the touch mode; and switching another one of the touch antenna units and another corresponding switching circuit to an antenna mode. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ wherein a first portion of the touch antenna units are switched to the touch mode, a second portion of the touch antenna units are switched to the antenna mode, and a third portion of the touch antenna units are switched to an idle mode, the third portion of the touch antenna units in the idle mode are floating or electrically connected to a ground voltage.

12. The driving method of display device of claim 11, wherein in the one of the touch antenna units in the touch mode, the first end of the first loop electrode is electrically connected to a first signal line through corresponding switch circuit, the second end of the first loop electrode is electrically connected to a second signal line through corresponding switch circuit, the third end of the second loop electrode is electrically connected to a third signal line through corresponding switch circuit, and the fourth end of the second loop electrode is electrically connected to a fourth signal line through corresponding switch circuit; and in the other of the touch antenna units in the antenna mode, the first end of the first loop electrode is electrically connected to the first signal line through corresponding switch circuit, and the second end of the first loop electrode is electrically connected to the third end of the second loop electrode through corresponding switch circuit.

13. The driving method of display device of claim 11, wherein the first portion of the touch antenna units are not adjacent to the second portion of the touch antenna units.

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