# US 10,319,327 B2 · Time-sharing driving method of touch display panel

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- Number: US 10,319,327 B2
- Document ID: US10319327B2
- Status: Granted
- Kind: B2
- Application number: 15/303,477
- Filed: 2016-08-17
- Published: 2018-06-28
- Granted: 2019-06-11
- Earliest claimed: 2016-07-08
- Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd.
- Inventors: Man Li; Wei Chen
- Web page: https://patentgrep.com/patent/US10319327B2

## CPC

- G09G 3/3685: {Details of drivers for data electrodes}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/04184: {Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally}
- G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)}
- G06F 3/044: by capacitive means
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2320/0233: Improving the luminance or brightness uniformity across the screen
- G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

The present disclosure discloses a driving method and a driving device of a display panel. The driving method comprises: to detect the operating state of said display panel; to switch the bias current which is in said data line driving circuit according to said operating state of said display panel in order to make display brightness of said display panel be uniform. Through the above way, the present disclosure can improve the signal distortion caused by the leakage current of the gate signal on the data line, making the brightness of the display panel be uniform, improving the user's experience.

## Claims

### Claim 1

A driving method of a display panel, wherein said display panel comprises a plurality of display units and a plurality of touch units, said display unit and said touch unit being time-sharing driven in a display period of a frame image in order to make operating state of said display panel be time-sharing in display state and touch scan state, the display state corresponding to a plurality of display stages, the touch scan state corresponding to a plurality of touch scan stages, wherein the display period of a frame image includes the plurality of display stages and the plurality of touch stages, said method comprising:
providing a bias current which is in a data line driving circuit as a first current;
acquiring current data frame, and said first current driving a data line of said display panel during one display stage of the plurality of display stages to display a corresponded part of said current data frame in a first display unit;
determining the operating state of said display panel;
switching the bias current which is in said data line driving circuit according to said operating state of said display panel in order to make display brightness of said display panel be uniform;
wherein said operating state comprises said display state and said touch scan state, said bias current comprises said first current and a second current;
wherein said first current is less than said second current, the driving ability of said data line driving circuit with said second current is larger than that of said data line driving circuit with said first current;
wherein the step of switching the bias current which is in said data line driving circuit according to said operating state of said display panel comprises:
determining whether said operating state of said display panel is converted from said touch scan state to said display state;
when said operating state of said display panel is converted from said touch scan state to said display state, providing said bias current in said data line driving circuit as said second current;
said second current driving a data line of said display panel during another display stage of the plurality of display stages to display a first row of a second corresponded part of the current data frame row pixel in said display panel;
determining whether the display of first row of said row pixel has completed;
when the display of first row of said row pixel having been completed, switching said bias current in said data line driving circuit from said second current to said first current, and said first current driving a data line of said display panel to display said corresponded part of current data frame in said display panel which is to be displayed.

### Claim 2 (depends on 1)

The driving method as claimed in claim 1, wherein said method further comprises:
determining whether said display unit which is to be displayed is the last display unit of said display panel;
when said display unit which is to be displayed is the last display unit of said display panel, proceeding with the operation of determining the operating state of said display panel.