CN-116126172-B - Display panel and operation method thereof

Abstract

The invention provides a display panel and an operation method thereof. The display panel comprises a display area and a frame area. The display area is used for displaying images. The display area and the frame area can send out uplink signals during touch sensing so as to perform active pen touch detection operation.

Inventors

• TANG YOUYING
• ZHANG WEIREN
• KE ZHIYANG
• LAI ZHIZHANG

Assignees

• 联咏科技股份有限公司

Dates

Publication Date

20260508

Application Date

20220908

Priority Date

20220706

Claims (17)

1. 1. A display panel, the display panel comprising: The display area is used for displaying images and sending out uplink signals during touch sensing so as to perform active pen touch detection operation; A frame region including a gate driving circuit and an uplink signal wire, wherein a clock end of the gate driving circuit is coupled to the clock wire via a switch circuit, and the frame region is used for sending the uplink signal via the clock wire during the touch sensing to perform the active pen touch detection operation And an upper substrate, wherein the uplink signal wires of the frame region serve as a black matrix layer of the upper substrate.
2. 2. The display panel of claim 1, wherein the bezel area is adjacent to a frame of the display panel and is located outside the display area.
3. 3. The display panel of claim 1, wherein the display panel sends the up signal to the active pen to trigger the active pen to send a down signal, and wherein the display area receives the down signal sent by the active pen to perform a positioning operation on the active pen.
4. 4. The display panel of claim 1, wherein the bezel area has no display function.
5. 5. The display panel of claim 1, wherein the display panel comprises, The uplink signal wire is used for being coupled to a touch detection circuit to receive the uplink signal, and the touch detection circuit sends the uplink signal through the uplink signal wire of the frame area during the touch sensing period to perform the active pen touch detection operation.
6. 6. The display panel of claim 5, wherein the bezel area further comprises: And the electrostatic discharge protection wire is used for electrostatic discharge protection, wherein the electrostatic discharge protection wire and the uplink signal wire are arranged on the same conductive layer of the display panel.
7. 7. The display panel of claim 5, wherein the display panel comprises, The grid driving circuit is used for driving a plurality of scanning lines of the display area, wherein the grid driving circuit and the uplink signal wire are configured on different conductive layers of the display panel.
8. 8. The display panel of claim 1, wherein the uplink signal wire is a silver paste printed circuit or an adhesive copper foil circuit.
9. 9. The display panel of claim 1, wherein the gate driving circuit is configured to drive a plurality of scan lines of the display region, and the frame region further comprises: A first switch having a first end coupled to the clock end of the gate drive circuit; The clock wire has a first end coupled to the second end of the first switch; A second switch having a first end coupled to the second end of the clock wire, wherein the second end of the second switch is configured to be coupled to a gate clock source, and the first switch and the second switch are turned on during display driving such that a clock signal of the gate clock source is transmitted to the clock end of the gate driving circuit through the second switch, the clock wire and the first switch, and A third switch having a first end coupled to the second end of the clock wire, wherein the second end of the third switch is configured to be coupled to a touch detection circuit to receive the uplink signal, and the first switch and the second switch are turned off and the third switch is turned on during the touch sensing, such that the clock wire acts as an uplink signal wire to emit the uplink signal.
10. 10. An operation method of a display panel, wherein the display panel includes a display area, an upper substrate, and a frame area, the frame area includes a gate driving circuit and an uplink signal wire, a clock end of the gate driving circuit is coupled to a clock wire via a switch circuit, the operation method includes: taking the uplink signal wire of the frame area as a black matrix layer of the upper substrate; displaying an image from the display area, and And sending an uplink signal by the display area and the frame area through the clock wire during touch sensing so as to perform active pen touch detection operation.
11. 11. The method of operation of claim 10, further comprising: The display panel sends the uplink signal to the active pen to trigger the active pen to send the downlink signal, and And the display area receives the downlink signal sent by the active pen so as to position the active pen.
12. 12. The method of operation of claim 10, wherein the bezel area has no display function.
13. 13. The method of operation of claim 10, further comprising: and the uplink signal wire of the frame area sends out the uplink signal provided by the touch detection circuit during the touch sensing period so as to perform the touch detection operation of the active pen.
14. 14. The method of claim 13, wherein the frame region further comprises an esd protection wire for esd protection, and the esd protection wire and the uplink signal wire are disposed on the same conductive layer of the display panel.
15. 15. The method of claim 13, wherein the gate driving circuit is configured to drive a plurality of 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. 16. The method of claim 10, wherein the uplink signal conductor is a silver paste printed circuit or an adhesive copper foil circuit.
17. 17. The method of operation of claim 10, further comprising: Driving a plurality of scan lines of the display region by the gate driving circuit in the frame region, wherein the frame region further comprises a first switch, a second switch, a third switch, and a clock wire, a first end of the first switch being coupled to a clock end of the gate driving circuit, a first end of the clock wire being coupled to a second end of the first switch, a first end of the second switch being coupled to a second end of the clock wire, a second end of the second switch being configured to be coupled to a gate clock source, a first end of the third switch being coupled to the second end of the clock wire, and a second end of the third switch being configured to be coupled to a touch detection circuit to receive the uplink signal; Turning on the first switch and the second switch during display driving so that a clock signal of the gate clock source is transferred 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 period, the first switch and the second switch are turned off, and the third switch is turned on, so that the clock wire is used as an uplink signal wire to send out the uplink signal.

Description

Display panel and operation method thereof Technical Field The present invention relates to an electronic device, and more particularly, to a display panel and an operating method thereof. Background After the capacitive active pen (CAPACITIVE ACTIVE stylus) finishes pairing with the display device, a user can operate the active pen to write and draw on the display panel of the display device. Generally, the display panel is divided into a display area (DISPLAY AREA) and a frame area (FRAME AREA or a border area). The bezel area is configured with a light shielding layer (LIGHT SHIELDING LAYER) so that the bezel area does not have a display function. In addition, the frame area does not have an active pen detection function or a touch detection function. The display area is used for displaying images. In addition, the display area has an active pen detection function and a touch detection function. The display area sends an uplink signal (uplink signal) during touch sensing, and (or) the display area receives a downlink signal (downlink signal) sent by the active pen during touch sensing, so as to perform an active pen touch detection operation. For example, the sensing electrode in the display area of the display panel may transmit an uplink signal to the active pen for pairing communication. After the pairing is successful, the active pen can transmit a downlink signal to the display panel to report points/position. In order to save power, the active pen generally starts to send a downlink signal to the display panel after receiving the uplink signal from the display panel. However, this approach may cause usage confusion in some usage scenarios. For example, in the process that the active pen makes a line/moves from the edge (border area) of the display panel to the center direction, the active pen does not receive the uplink signal transmitted by the display area of the display panel in the border area of the display panel, and the active pen does not receive the uplink signal and pair until entering the display area of the display panel. Therefore, the active pen cannot output the downlink signal at the initial stage (the period when the pairing is not completed or the active pen wakes up) of entering the display area, so that the active pen cannot write on the edge of the display area when the active pen makes a line from the border area to the central direction. That is, the writing of the active pen may be interrupted at the edge of the display area. It should be noted that the content of the "background art" section is intended to aid in understanding the present invention. Some (or all) of the disclosure in the background section may not be known to those of skill in the art. The disclosure in the background section is not presented for the purpose of providing a representation of what has been known to those of ordinary skill in the art prior to the application of the present invention. Disclosure of Invention The invention provides a display panel and an operation method thereof, which are used for sending an uplink signal (uplink signal) in real time to perform an active stylus (active stylus) touch detection operation. In an embodiment of the invention, the display panel includes a display area (DISPLAY AREA) and a frame area (FRAME AREA or a border area). The display area is used for displaying images. The display area sends out an uplink signal during the touch sensing period so as to perform the active pen touch detection operation. The frame area is used for sending out an uplink signal during touch sensing so as to perform an active pen touch detection operation. In an embodiment of the invention, the operation method includes displaying an image on the display area, and sending an uplink signal from the display area and the frame area during touch sensing to perform an active pen touch detection operation. Based on the above, the frame area of the display panel according to the embodiments of the present invention can send an uplink signal to the active pen during touch sensing. In the process that the active pen makes a line/moves from the border area of the display panel to the central direction, the active pen in the border area can receive the uplink signal transmitted by the border area, and then the active pen in the display area can continuously receive the uplink signal transmitted by the display area. Therefore, before the active pen enters the display area of the display panel, the active pen can perform the active pen touch detection operation (for example, pairing) in advance based on the uplink signal emitted by the frame area. The display panel can send out an uplink signal in real time to perform active pen touch detection operation. Therefore, the active pen can send downlink signals to the display panel before entering the display area, so that the active pen can write at the edge and other positions of the display area when the active pen makes a line from the frame are