Display panel and method of operating the same

Abstract

The present application provides a display panel and an operating method thereof. The display panel includes a display area and a bezel area. The display area is used to display images. The display area and the bezel area can emit uplink signals during touch sensing to perform active pen touch detection operations.

Description

Technical Field

[0001] This invention relates to an electronic device, and more particularly to a display panel and its operation method. Background Technology

[0002] After a capacitive active stylus is paired with a display device, the user can use the stylus to write and draw on the display panel. Generally, the display panel is divided into a display area and a frame area (or border area). The border area is equipped with a light-shielding layer, preventing it from displaying anything. Furthermore, the border area does not have active stylus detection or touch detection capabilities. The display area is used to display images. It also has active stylus detection and touch detection capabilities. During touch sensing, the display area emits an uplink signal and / or receives a downlink signal emitted by the active stylus to perform active stylus touch detection. For example, the sensing electrodes in the display area of ​​the display panel can emit an uplink signal to the active stylus for pairing communication. After successful pairing, the active stylus can emit a downlink signal to the display panel for point reporting / positioning.

[0003] To conserve power, active pens typically only send downlink signals to the display panel after receiving an uplink signal. However, this approach can cause inconvenience in certain usage scenarios. For example, when the active pen is drawing / moving from the edge (bezel area) of the display panel towards the center, it may not receive the uplink signal emitted by the display area until it enters the display area and completes pairing. Therefore, the active pen cannot output downlink signals initially upon entering the display area (during the pairing process or while the pen is awake), preventing it from writing at the edges of the display area when drawing from the bezel towards the center. In other words, the writing will be interrupted at the edges of the display area.

[0004] It should be noted that the content of the "Background Art" paragraph is used to help understand the present invention. Some (or all) of the content disclosed in the "Background Art" paragraph may not be prior art known to those skilled in the art. The content disclosed in the "Background Art" paragraph does not imply that such content was known to those skilled in the art prior to this application. Summary of the Invention

[0005] This invention provides a display panel and its operation method to send uplink signals in real time to perform active stylus touch detection.

[0006] In an embodiment of the present invention, the display panel includes a display area and a frame area (or border area). The display area is used to display images. During touch sensing, the display area emits an uplink signal to perform active pen touch detection. The border area is used to emit an uplink signal during touch sensing to perform active pen touch detection.

[0007] In an embodiment of the present invention, the above-described operation method includes: displaying an image by the display area; and emitting an uplink signal from the display area and the border area during touch sensing to perform active pen touch detection operation.

[0008] Based on the above, the bezel area of ​​the display panel described in the embodiments of the present invention can emit an uplink signal to the active pen during touch sensing. As the active pen draws / moves from the bezel area of ​​the display panel towards the center, the active pen in the bezel area can receive the uplink signal emitted by the bezel area, and then the active pen in the display area can continue to receive the uplink signal emitted by the display area. Therefore, before entering the display area of ​​the display panel, the active pen can perform an early active pen touch detection operation (e.g., pairing) based on the uplink signal emitted by the bezel area. The display panel can emit an uplink signal in real time to perform the active pen touch detection operation. Accordingly, the active pen can prepare to emit a downlink signal to the display panel before entering the display area, so when the active pen draws a line from the bezel area towards the center, the active pen can write on the edge of the display area and other positions. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a circuit block of a display device according to an embodiment of the present invention.

[0010] Figure 2 This is a flowchart illustrating an operation method of a display panel according to an embodiment of the present invention.

[0011] Figure 3 and Figure 4 This is a cross-sectional schematic diagram of a display panel according to an embodiment of the present invention.

[0012] Figure 5 This is a top view of the border area of ​​the display panel, illustrated according to an embodiment of the present invention.

[0013] Figure 6 This is a cross-sectional schematic diagram of the border area of ​​the display panel, drawn according to an embodiment of the present invention.

[0014] Figure 7 This is a cross-sectional schematic diagram of the border area of ​​the display panel, drawn according to another embodiment of the present invention.

[0015] Figure 8 This is a cross-sectional schematic diagram of the border area of ​​the display panel, illustrated according to another embodiment of the present invention.

[0016] Figure 9 This is a top view of the border area of ​​the display panel, illustrated according to an embodiment of the present invention.

[0017] Figure 10A and Figure 10B This is a circuit diagram of a gate drive circuit drawn according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures

[0019] 10: Active pen

[0020] 100: Display device

[0021] 110: Drive circuit

[0022] 120: Display panel

[0023] 121: Border Area

[0024] 122: Display Area

[0025] 510: Electrostatic Discharge Protection Conductor

[0026] 520, 610, 710, 810: Uplink signal wires

[0027] 620, 910: Gate drive circuit

[0028] 720: Conductive materials

[0029] BM7, BM8: Black Matrix Layer

[0030] CKW101, CKW102: Clock wires

[0031] CLK_1, CLK_2: Clock signals

[0032] S210, S220: Steps

[0033] SUB6, SUB72, SUB82: lower base plate

[0034] SUB71, SUB81: upper substrate

[0035] SW101, SW102, SW103, SW104, SW105, SW106: Switches

[0036] UL: Uplink signal

[0037] VGH, VGL: Voltage sources Detailed Implementation

[0038] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

[0039] The term "coupled (or connected)" as used throughout this specification (including the claims) may refer to any direct or indirect means of connection. For example, if the text describes a first device coupled (or connected) to a second device, it should be interpreted as the first device being directly connected to the second device, or the first device being indirectly connected to the second device through other devices or some means of connection. The terms "first," "second," etc., used throughout this specification (including the claims) are used to name components or distinguish different embodiments or scopes, and are not intended to limit the upper or lower limit of the number of components, nor to limit the order of components. Furthermore, wherever possible, components / components / steps using the same reference numerals in the drawings and embodiments represent the same or similar parts. Components / components / steps using the same reference numerals or the same terms in different embodiments may be referred to mutually in the relevant descriptions.

[0040] The following embodiments illustrate a novel improvement in panel architecture. These embodiments lay signal paths in the bezel area of ​​the display panel to provide an uplink signal to the active stylus. Therefore, the active stylus can pre-acquire the uplink signal and complete pairing in the bezel area (non-display area) of the display panel. These embodiments improve the signal quality of the uplink signal in the bezel area without changing the electrode size of the display area, thereby alleviating the problem of edge writing interruptions.

[0041] Figure 1 This is a schematic diagram of a circuit block of a display device 100 according to an embodiment of the present invention. Figure 1 The display device 100 shown includes a driving circuit 110 and a display panel 120. The driving circuit 110 can drive the display panel 120 to display images in the display area 122 of the display panel 120. In some embodiments, the display area 122 also has a touch detection function. The driving circuit 110 can detect touch events occurring in the display area 122 through the touch electrodes of the display area 122. Figure 1 In the illustrated embodiment, the display area 122 also has an active pen touch detection function. The driving circuit 110 can send an uplink signal to the active pen 10 through the electrodes of the display area 122, and receive a downlink signal from the active pen 10 through the electrodes of the display area 122.

[0042] In addition, Figure 1 In the illustrated embodiment, the driving circuit 110 can also send an uplink signal to the active pen 10 via the frame area (or border area) 121 of the display panel 120. The frame area 121 is adjacent to the frame (not shown) of the display panel 120 and is located outside the display area 122. The frame of the display panel 120 is used to fix the display panel 120 to a specific position within the display device 100. Generally, the frame area 121 is configured with a light shielding layer, so that the frame area 121 does not have a display function. Depending on the actual design, the light shielding layer may include a black matrix layer, an opaque printing ink layer, or any other opaque non-conductive material layer.

[0043] Figure 2 This is a flowchart illustrating an operation method of a display panel 120 according to an embodiment of the present invention. Please refer to... Figure 1 and Figure 2 In step S210, the driving circuit 110 drives the display panel 120 to display an image in the display area 122 of the display panel 120. In step S220, the bezel area 121 and the display area 122 of the display panel 120 send an uplink signal to the active pen 10 during touch sensing to perform an active pen touch detection operation. Before entering the display area 122, the active pen 10 can perform an active pen touch detection operation (e.g., pairing) in advance based on the uplink signal emitted by the bezel area 121. Based on this, the active pen 10 can be prepared in advance and send a downlink signal to the display panel 120 before entering the display area 122.

[0044] Figure 3 This is a cross-sectional schematic diagram of the display panel 120 according to an embodiment of the present invention. Figure 3 The active pen 10, display panel 120, border area 121, and display area 122 shown can be referenced. Figure 1The descriptions of the active pen 10, display panel 120, bezel area 121, and display area 122 are omitted here. When the active pen 10 moves above the bezel area 121 of the display panel 120, the signal path of the bezel area 121 can send an uplink signal to the active pen 10 during touch sensing to perform active pen touch detection. According to the actual design, the signal path of the bezel area 121 can be configured in the metal layer M0 (not shown), metal layer M1 (not shown), metal layer M2 (not shown), metal layer M3 (not shown), indium tin oxide (ITO) layer (not shown), and / or other conductive layers of the display panel 120. During the process of the active pen 10 drawing / moving from the bezel area 121 to the display area 122, the active pen 10 in the bezel area 121 can receive the uplink signal emitted by the bezel area 121. The uplink signal emitted by the border area 121 can trigger the active pen 10 to emit a downlink signal, and the display area 122 can receive the downlink signal emitted by the active pen 10 to perform positioning operation on the active pen 10.

[0045] Figure 4 This is a cross-sectional schematic diagram of the display panel 120 according to an embodiment of the present invention. Figure 4 The active pen 10, display panel 120, border area 121, and display area 122 shown can be referenced. Figure 1 The descriptions of the active pen 10, display panel 120, bezel area 121, and display area 122 shown are omitted here. When the active pen 10 moves above the display area 122 of the display panel 120, the electrodes of the display area 122 can send uplink signals to the active pen 10 and receive downlink signals sent by the active pen 10 during touch sensing to perform active pen touch detection operation.

[0046] The uplink signals emitted by the bezel area 121 and the display area 122 can trigger the active pen 10 to emit downlink signals, and the display area 122 can receive the downlink signals emitted by the active pen 10 to perform positioning operations on the active pen 10. During the process of the active pen 10 drawing / moving from the bezel area 121 to the display area 122, the active pen 10 in the bezel area 121 can receive the uplink signals emitted by the bezel area 121, and then the active pen 10 in the display area 122 can continue to receive the uplink signals emitted by the display area 122. Therefore, before entering the display area 122, the active pen 10 can perform active pen touch detection operations (e.g., pairing) in advance based on the uplink signals emitted by the bezel area 121. The display panel 120 can emit uplink signals in real time to perform active pen touch detection operations. Based on this, the active pen 10 can be ready and emit downlink signals to the display panel 120 before entering the display area 122. Therefore, when the active pen 10 draws a line from the border area 121 to the display area 122, the active pen 10 can write on the edge of the display area 122 and other positions.

[0047] Figure 5 This is a top view of the border area 121 of the display panel 120, illustrated according to an embodiment of the present invention. Figure 5 A magnified view of a portion of border area 121 is shown. Figure 5 In the illustrated embodiment, an electrostatic discharge (ESD) protection conductor 510 and an uplink signal conductor 520 are laid on the bezel area 121. The ESD protection conductor 510 is used for electrostatic discharge protection. The ESD protection conductor 510 and the uplink signal conductor 520 are disposed on the same conductive layer of the display panel 120. In some embodiments, the ESD protection conductor 510 and the uplink signal conductor 520 are disposed in a metal layer M1 or M2 of the display panel 120. The uplink signal conductor 520 is used to couple to a touch detection circuit (e.g., a driving circuit 110) to receive an uplink signal. During touch sensing, the touch detection circuit can send an uplink signal to the active pen 10 through the uplink signal conductor 520 of the bezel area 121 to perform an active pen touch detection operation.

[0048] Figure 6 This is a cross-sectional schematic diagram of the border area 121 of the display panel 120, drawn according to an embodiment of the present invention. Figure 6 The display panel 120 shown has a lower substrate SUB6. Thin film transistors (TFTs) of the display panel 120 can be disposed on the lower substrate SUB6. In the case that the display panel 120 is a non-self-emissive panel, the lower substrate SUB6 can be a light-transmitting substrate to facilitate backlight transmission through the display panel 120.

[0049] exist Figure 6 In the embodiment shown, the border area 121 is covered with an uplink signal line 610 and a gate driver circuit (or gate driver-on-array (GOA)) 620. Figure 6 The uplink signal cable 610 shown can be referenced. Figure 5 The related descriptions of the uplink signal conductor 520 shown are extrapolated and will not be repeated here. The gate drive circuit 620 can drive multiple scan lines (not shown) of the display area 122 during display driving to display images. Figure 6 In the illustrated embodiment, the gate drive circuit 620 and the uplink signal conductor 610 are disposed on different conductive layers of the display panel 120. For example, the bezel area 121 is provided with a light-shielding layer, so that the bezel area 121 does not have a display function. The uplink signal conductor 610 can serve as the light-shielding layer.

[0050] Figure 7 This is a cross-sectional view of the border area 121 of the display panel 120, as illustrated in another embodiment of the present invention. Figure 7 The display panel 120 shown has an upper substrate SUB71 and a lower substrate SUB72. The upper substrate SUB71 can be a light-transmitting substrate, such as a glass substrate. The thin-film transistors (TFTs) of the display panel 120 can be disposed on the lower substrate SUB72. In the case that the display panel 120 is a non-self-emissive panel, the lower substrate SUB72 can be a light-transmitting substrate to facilitate backlight transmission through the display panel 120.

[0051] exist Figure 7 In the illustrated embodiment, the black matrix layer BM7 (light-shielding layer) of the upper substrate SUB71 is disposed in the bezel area 121, so that the bezel area 121 does not have a display function. Uplink signal lines 710 are also laid in the bezel area 121. Figure 7 The uplink signal cable 710 shown can be referenced. Figure 5 The description of the uplink signal conductor 520 shown is extrapolated and will not be repeated here. The uplink signal conductor 710 is disposed on the underside of the black matrix layer BM7. Depending on the actual design, in some embodiments, the uplink signal conductor 710 may be a silver paste printed circuit or an adhesive copper foil circuit. The uplink signal conductor 710 may be electrically connected to the touch detection circuit (e.g., the driver circuit 110) via the conductive material 720 to receive the uplink signal.

[0052] Figure 8 This is a cross-sectional view of the border area 121 of the display panel 120, as illustrated in another embodiment of the present invention. Figure 8The display panel 120 shown has an upper substrate SUB81 and a lower substrate SUB82. The upper substrate SUB81 can be a light-transmitting substrate, such as a glass substrate. The thin-film transistors (TFTs) of the display panel 120 can be disposed on the lower substrate SUB82. In the case that the display panel 120 is a non-self-emissive panel, the lower substrate SUB82 can be a light-transmitting substrate to facilitate backlight transmission through the display panel 120.

[0053] exist Figure 8 In the embodiment shown, the border area 121 is also covered with an uplink signal cable 810. Figure 8 The uplink signal cable 810 shown can be referenced. Figure 5 The related descriptions of the uplink signal conductor 520 shown are analogous and will not be repeated here. The uplink signal conductor 810 can serve as the black matrix layer BM8 (light-shielding layer) of the upper substrate SUB81, thus preventing the bezel area 121 from having display functionality. The black matrix layer BM8 of the bezel area 121 can be made of conductive ink, giving the black matrix layer BM8 the characteristics of the uplink signal conductor 810. Figure 8 In the illustrated embodiment, the upper substrate SUB81 only needs to be coated with a conductive black matrix layer BM8 without the need for additional conductive layers. The uplink signal conductor 810 can be electrically connected to the touch detection circuit (e.g., the drive circuit 110) via a conductive material to receive the uplink signal.

[0054] Figure 9 This is a top view of the border area 121 of the display panel 120, illustrated according to an embodiment of the present invention. Figure 9 A magnified view of a portion of border area 121 is shown. Figure 9 In the illustrated embodiment, a gate drive circuit (or GOA) 910 is disposed in the border area 121. The gate drive circuit 910 can drive multiple scan lines (not shown) of the display area 122 to display images during display driving.

[0055] Figure 10A and Figure 10B This is a circuit diagram of the gate drive circuit 910 according to an embodiment of the present invention. Figure 10A The diagram illustrates the switching states of the gate drive circuit 910 during display driving, and Figure 10B The diagram illustrates the switching states of the gate drive circuit 910 during touch sensing. Figure 10A and Figure 10B In the illustrated embodiment, the border region 121 includes a gate drive circuit 910, a switch SW101, a switch SW102, a switch SW103, a switch SW104, a switch SW105, and a switch SW106. Figure 10A and Figure 10B The gate drive circuit 910 shown can be referenced. Figure 9 The relevant description of the gate drive circuit 910 shown. Figure 10A and Figure 10B The VGH and VGL shown represent voltage sources with different levels.

[0056] The first terminal of switch SW101 is coupled to one clock terminal of gate drive circuit 910, and the first terminal of switch SW102 is coupled to the other clock terminal of gate drive circuit 910. The first terminal of clock line CKW101 is coupled to the second terminal of switch SW101, and the first terminal of clock line CKW102 is coupled to the second terminal of switch SW102. The first terminal of switch SW103 is coupled to the second terminal of clock line CKW101. The second terminal of switch SW103 is used to couple to a gate clock source (not shown) to receive clock signal CLK_1. The first terminal of switch SW104 is coupled to the second terminal of clock line CKW101. The second terminals of switches SW104 and SW105 are used to couple to a touch detection circuit (e.g., drive circuit 110) to receive uplink signal UL. The first terminals of switches SW105 and SW106 are coupled to the second terminal of clock line CKW102. The second terminal of switch SW106 is used to couple to the gate clock source (not shown) to receive the clock signal CLK_2.

[0057] exist Figure 10A During the drive period shown, switches SW101, SW102, SW103, and SW106 are turned on, while switches SW104 and SW105 are turned off. Therefore, the clock signal CLK_1 from the gate clock source can be transmitted to the clock terminal of the gate drive circuit 910 via switch SW103, clock wire CKW101, and switch SW101, while the clock signal CLK_2 from the gate clock source can be transmitted to another clock terminal of the gate drive circuit 910 via switch SW106, clock wire CKW102, and switch SW102.

[0058] exist Figure 10B During the touch sensing period shown, switches SW101, SW102, SW103, and SW106 are off, while switches SW104 and SW105 are on. Therefore, clock wires CKW101 and CKW102 can serve as uplink signal wires. At this time, clock wires CKW101 and CKW102 can send an uplink signal UL to the active pen 10 to perform active pen touch detection.

[0059] In summary, the bezel area 121 of the display panel 120 described in the above embodiments can emit an uplink signal UL to the active pen 10 during touch sensing. During the process of the active pen 10 drawing / moving from the bezel area 121 to the display area 122 of the display panel 120, the active pen 10 in the bezel area 121 can receive the uplink signal UL emitted by the bezel area 121, and then the active pen 10 in the display area 122 can continue to receive the uplink signal UL emitted by the display area 122. Therefore, before the active pen 10 enters the display area 122 from the bezel area 121, the active pen 10 can perform an active pen touch detection operation (e.g., pairing) based on the uplink signal UL emitted by the bezel area 121. Based on this, the active pen 10 can be ready to emit a downlink signal to the display panel 120 before entering the display area 122. Therefore, when the active pen 10 draws from the bezel area 121 to the display area 122, the active pen 10 can write on the edge and other positions of the display area 122.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, The display panel includes: The display area is used to display images and to send uplink signals during touch sensing for active pen touch detection. A bezel area, including a gate driving circuit and an uplink signal line, wherein the clock terminal of the gate driving circuit is coupled to the clock line via a switching circuit, and wherein the bezel area is used to emit the uplink signal via the clock line during the touch sensing to perform the active pen touch detection operation; and The upper substrate, wherein the uplink signal conductor in the border region serves as the black matrix layer of the upper substrate.

2. The display panel according to claim 1, characterized in that, The border area is adjacent to the frame of the display panel and is located outside the display area.

3. The display panel according to claim 1, characterized in that, The display panel sends an uplink signal to the active pen to trigger the active pen to send a downlink signal, and the display area receives the downlink signal sent by the active pen to perform a positioning operation on the active pen.

4. The display panel according to claim 1, characterized in that, The border area does not have a display function.

5. The display panel according to claim 1, characterized in that, The uplink signal wire is used to couple to the touch detection circuit to receive the uplink signal, wherein the touch detection circuit emits the uplink signal through the uplink signal wire in the border area during the touch sensing to perform the active pen touch detection operation.

6. The display panel according to claim 5, characterized in that, The border area further includes: Electrostatic discharge protection wire, used for electrostatic discharge protection, wherein the electrostatic discharge protection wire and the uplink signal wire are disposed on the same conductive layer of the display panel.

7. The display panel according to claim 5, characterized in that, The gate driving circuit is used to drive multiple scan lines of the display area, wherein the gate driving circuit and the uplink signal line are disposed on different conductive layers of the display panel.

8. The display panel according to claim 1, characterized in that, The uplink signal conductor is either a silver paste printed circuit or an adhesive copper foil circuit.

9. The display panel according to claim 1, characterized in that, The gate driving circuit is used to drive multiple scan lines of the display area, and the border area further includes: A first switch has a first terminal, the first terminal of the first switch being coupled to the clock terminal of the gate drive circuit; The clock wire has a first end, and the first end of the clock wire is coupled to the second end of the first switch; A second switch has a first terminal, the first terminal of which is coupled to a second terminal of the clock conductor, wherein the second terminal of the second switch is coupled to a gate clock source, and during display driving, the first switch and the second switch are turned on, such that the clock signal of the gate clock source is transmitted to the clock terminal of the gate driving circuit through the second switch, the clock conductor, and the first switch; and A third switch has a first terminal coupled to the second terminal of the clock conductor, wherein the second terminal of the third switch is coupled to a touch detection circuit to receive the uplink signal, and during the touch sensing period, the first switch and the second switch are off and the third switch is on, such that the clock conductor acts as an uplink signal conductor to transmit the uplink signal.

10. A method for operating a display panel, characterized in that, The display panel includes a display area, an upper substrate, and a bezel area. The bezel area includes a gate driving circuit and an uplink signal line. The clock terminal of the gate driving circuit is coupled to the clock line via a switching circuit. The operation method includes: The uplink signal conductor in the border area is used as the black matrix layer of the upper substrate; The image is displayed in the display area; and During touch sensing, the display area and the bezel area send an uplink signal via the clock wire to perform active pen touch detection.

11. The operating method according to claim 10, characterized in that, The operation method further includes: The display panel sends the uplink signal to the active pen, triggering the active pen to send a downlink signal; and The display area receives the downlink signal emitted by the active pen to perform a positioning operation on the active pen.

12. The operating method according to claim 10, characterized in that, The border area does not have a display function.

13. The operating method according to claim 10, characterized in that, The operation method further includes: The uplink signal provided by the touch detection circuit is emitted by the uplink signal wire of the border area during the touch sensing to perform the active pen touch detection operation.

14. The operating method according to claim 13, characterized in that, The bezel area further includes electrostatic discharge protection wires for electrostatic discharge protection, and the electrostatic discharge protection wires and the uplink signal wires are disposed on the same conductive layer of the display panel.

15. The operating method according to claim 13, characterized in that, The gate driving circuit is used to drive multiple scan lines of the display area, and the gate driving circuit and the uplink signal line are disposed on different conductive layers of the display panel.

16. The operating method according to claim 10, characterized in that, The uplink signal conductor is either a silver paste printed circuit or an adhesive copper foil circuit.

17. The operating method according to claim 10, characterized in that, The operation method further includes: Multiple scan lines of the display area are driven by the gate driving circuit in the bezel area. The bezel area further includes a first switch, a second switch, a third switch, and a clock wire. A first end of the first switch is coupled to the clock terminal of the gate driving circuit. A first end of the clock wire is coupled to the second end of the first switch. A first end of the second switch is coupled to the second end of the clock wire. The second end of the second switch is used to couple to a gate clock source. A first end of the third switch is coupled to the second end of the clock wire. The second end of the third switch is used to couple to a touch detection circuit to receive the uplink signal. During display driving, the first switch and the second switch are turned on, such that the clock signal of the gate clock source is transmitted to the clock terminal of the gate driving circuit through the second switch, the clock wire, and the first switch; and During the touch sensing, the first switch and the second switch are turned off and the third switch is turned on, so that the clock wire acts as an uplink signal wire to emit the uplink signal.

Images