# US 12,112,717 B2 · Driving method for flicker suppression of display panel and driving circuit thereof

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- Number: US 12,112,717 B2
- Document ID: US12112717B2
- Status: Granted
- Kind: B2
- Application number: 18/377,433
- Filed: 2023-10-06
- Published: 2024-02-01
- Granted: 2024-10-08
- Earliest claimed: 2019-08-02
- Assignees: Sitronix Technology Corp.
- Applicants: Sitronix Technology Corporation
- Inventors: Hung-Yu Lu; Rong-Fong Chen
- Web page: https://patentgrep.com/patent/US12112717B2

## CPC

- G09G 3/3607: {for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127)}
- G09G 3/3655: {Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors}
- G09G 3/3677: {suitable for active matrices only}
- G09G 3/3685: {Details of drivers for data electrodes}
- G09G 3/3688: {suitable for active matrices only}
- G09G 3/3614: {Control of polarity reversal in general}
- G09G 2310/0205: Simultaneous scanning of several lines in flat panels
- G09G 2310/0224: Details of interlacing
- G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
- G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
- G09G 2320/0271: Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G 2320/0276: for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
- G09G 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve
- 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 invention relates to a driving method for flicker suppression of a display panel and a driving circuit thereof. The driving circuit includes a source driving circuit and a common voltage generating circuit. The driving method includes driving the source driving circuit to generate at least one first source signal and at least one second source signal, the first source signal corresponds to at least one first pixel on a first scanning line; the second source signal corresponds to at least one second pixel on a second scanning line. The common voltage generating circuit generates at least one common voltage. While driving the first pixel and the second pixel to display the same gray scale image, the first source signal is not equal to the second source signal, or a first common voltage and a second common voltage generated by the common voltage generating circuit are different.

## Claims

### Claim 1

A driving method for suppressing flicker of a display panel, comprising steps of:
driving a common voltage generating circuit to generate a first common voltage corresponding to at least one first pixel on a first scanning line;
driving the common voltage generating circuit to generate a second common voltage corresponding to at least one second pixel on a second scanning line;
driving a source driving circuit to generate at least one first source signal corresponding to the at least one first pixel on the first scanning line; and
driving the source driving circuit to generate at least one second source signal corresponding to the at least one second pixel on the second scanning line;
wherein while driving the at least one first pixel and the at least one second pixel to display the same gray scale images according to the first source signal and the first common voltage applied to the at least one first pixel on the first scanning line and the second source signal and the second common voltage applied to the at least one second pixel on the second scanning line, the first common voltage is not equal to the second common voltage, and the first source signal is identical to the second source signal, based on the feed-through voltage of the at least one first pixel on the first scanning line is different from the feed-through voltage of the at least one second pixel on the second scanning line.

### Claim 2 (depends on 1)

The driving method of claim 1, wherein in the step of driving a common voltage generating circuit to generate a first common voltage, the first common voltage is generated by the common voltage generating circuit according to an adjustment signal.

### Claim 3 (depends on 1)

The driving method of claim 1, wherein in the step of driving the common voltage generating circuit to generate a second common voltage, the second common voltage is generated by the common voltage generating circuit according to an adjustment signal.

### Claim 4 (depends on 1)

The driving method of claim 1, wherein each of the first pixel and each of the second pixel are jointly coupled to one source line.

### Claim 5

A driving circuit for suppressing flicker of a display panel, comprising:
a source driving circuit, generating at least one first source signal corresponding to at least one first pixel on a first scanning line, and generating at least one second source signal corresponding to at least one second pixel on a second scanning line; and
a common voltage generating circuit, generating a first common voltage corresponding to the at least one first pixel on the first scanning line and a second common voltage corresponding to the at least one second pixel on the second scanning line;
wherein when the at least one first pixel and the at least one second pixel are driven to display the same gray scale images according to the first source signal and the first common voltage applied to the at least one first pixel on the first scanning line and the second source signal and the second common voltage applied to the at least one second pixel on the second scanning line, the first common voltage is not equal to the second common voltage, and the at least one first source signal is identical to the at least one second source signal, based on the feed-through voltage of the at least one first pixel on the first scanning line is different from the feed-through voltage of the at least one second pixel on the second scanning line.

### Claim 6 (depends on 5)

The driving circuit of claim 5, wherein the common voltage generating circuit generates the first common voltage and the second common voltage according to an adjustment signal.

### Claim 7 (depends on 6)

The driving circuit of claim 6, further comprising an adjustment circuit generating the adjustment signal.

### Claim 8 (depends on 5)

The driving circuit of claim 5, wherein the source driving circuit further comprises:
a gamma voltage generating circuit, generating a plurality of gamma voltages; and
at least one digital-to-analog conversion circuit, selecting one of the gamma voltages according to a pixel data to generate the at least one first source signal and the at least one second source signal.

### Claim 9 (depends on 8)

The driving circuit of claim 8, wherein the gamma voltage generating circuit comprises:
a voltage dividing circuit, generating a plurality of dividing voltages; and
a gamma voltage selection unit, selecting partial dividing voltages of the dividing voltages according to a gamma curve data to generates the gamma voltages.

### Claim 10 (depends on 5)

The driving circuit of claim 5, wherein each of the first pixel and each of the second pixel are jointly coupled to one source line.