# US 11,908,366 B2 · Cross voltage compensation method for display panel, display panel and display device

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- Number: US 11,908,366 B2
- Document ID: US11908366B2
- Status: Granted
- Kind: B2
- Application number: 18/118,733
- Filed: 2023-03-07
- Published: 2023-07-13
- Granted: 2024-02-20
- Earliest claimed: 2020-09-24
- Assignees: Hkc Corporation Limited
- Applicants: Hkc Corporation Limited
- Inventors: Liang Zhang
- Web page: https://patentgrep.com/patent/US11908366B2

## CPC

- G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters}
- G09G 3/3614: {Control of polarity reversal in general}
- G09G 3/3688: {suitable for active matrices only}
- G09G 2310/062: Waveforms for resetting a plurality of scan lines at a time
- G09G 2320/0209: Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
- G09G 2320/0233: Improving the luminance or brightness uniformity across the screen
- 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)

## Abstract

The present application discloses a cross voltage compensation method for a display panel, a display panel and a display device. The cross voltage compensation method includes steps of transmitting a preset voltage signal to in-plane data lines after scan of scanning lines of a last row of a current frame is completed and before scanning lines of a first row of a next frame are started, keeping all the scanning lines at a close state while transmitting the preset voltage signal to in-plane data lines, and keeping all the scanning lines at a close state after scan of scanning lines of a last row of a current frame is completed and before scanning lines of a first row of a next frame are started, that is, V-blank time.

## Claims

### Claim 1

A cross voltage compensation method for a display panel, comprising:
transmitting a preset voltage signal to in-plane data lines after scanning of a scanning line of a last row of a current frame is completed and before scanning of a scanning line of a first row of a next frame is started; and
keeping all the scanning lines at a closed state while transmitting the preset voltage signal to the in-plane data lines;
wherein transmitting a preset voltage signal to in-plane data lines comprises:
acquiring a preset voltage signal having a same polarity as data signals of a first row of a next frame; and
transmitting the preset voltage signal having the same polarity as data signals of the first row of the next frame to the in-plane data lines;
wherein the acquiring a preset voltage signal having a same polarity as data signals of a first row of a next frame comprises:
acquiring data signals of the first row of the next frame from a timing controller IC after the scanning of the scanning line of the last row of the current frame is completed and before the scanning of the scanning line of the first row of the next frame is started; and
detecting and basing the data signals of the first row of the next frame to acquire the preset voltage signal having the same polarity as the data signals of the first row of the next frame.

### Claim 2 (depends on 1)

The cross voltage compensation method for a display panel according to claim 1, wherein the preset voltage signal takes a more appropriate value according to an actual voltage signal of the first row of the next frame.

### Claim 3 (depends on 1)

The cross voltage compensation method according to claim 1, wherein the preset voltage signal is stored in a data signal memory.

### Claim 4 (depends on 1)

The cross voltage compensation method according to claim 1, wherein the close state of scanning lines is enabled and maintained by controlling a gate driver circuit.

### Claim 5 (depends on 1)

The cross voltage compensation method for a display panel according to claim 1, wherein an absolute voltage value of the preset voltage signal does not exceed a voltage of data signal corresponding to 255 grayscale of the display panel.

### Claim 6 (depends on 1)

The cross voltage compensation method according to claim 1, wherein the preset voltage signal has a voltage magnitude that is a half of a voltage magnitude of a data signal corresponding to 255 grayscale of the display panel.