# US 12,763,001 B2 · Display panel driving circuit and display device including the same

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- Number: US 12,763,001 B2
- Document ID: US12763001B2
- Status: Granted
- Kind: B2
- Application number: 18/966,721
- Filed: 2024-12-03
- Published: 2025-08-21
- Granted: 2026-10-13
- Earliest claimed: 2024-02-20
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Se Dong Park
- Web page: https://patentgrep.com/patent/US12763001B2

## CPC

- G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED]
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
- G09G 2320/064: by time modulation of the brightness of the illumination source
- G09G 2330/021: Power management, e.g. power saving
- 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

A display panel driving circuit according to an embodiment and a display device including the same are disclosed. A display panel driving circuit includes a drive IC configured to supply PWM data of an input image to a plurality of data lines connected to pixels; and a driving control part configured to transmit the PWM data to the drive IC or modulate the PWM data to transmit it to the drive IC according to a result of comparing a grayscale value of the input image with a preset reference grayscale value, wherein the reference grayscale value is preset as a smallest grayscale value in which a flicker does not occur.

## Claims

### Claim 1

A display panel driving circuit comprising:
a drive IC configured to supply PWM data of an input image to a plurality of data lines connected to pixels; and
a driving control part configured to transmit the PWM data to the drive IC or modulate the PWM data to transmit it to the drive IC according to a result of comparing a grayscale value of the input image with a preset reference grayscale value,
wherein the reference grayscale value is preset as a smallest grayscale value in which a flicker does not occur,
wherein the driving control part is configured to modulate a duty ratio of the PWM data using a pre-stored lookup table and to modulate a voltage level of the modulated PWM data using a preset voltage value in response to the grayscale value of the input image is less than the reference grayscale value.

### Claim 2

A display device comprising:
a pixel array including a plurality of data lines, a plurality of scan lines, and a plurality of pixels;
a line selection part configured to supply a driving voltage to the plurality of scan lines;
a drive IC configured to supply PWM data of an input image to the plurality of data lines; and
a driving control part configured to transmit the PWM data to the drive IC or to modulate the PWM data to transmit it to the drive IC according to a result of comparing a grayscale value of the input image with a preset reference grayscale value,
wherein the reference grayscale value is preset as a smallest grayscale value in which a flicker does not occur,
wherein the driving control part is configured to modulate a duty ratio of the PWM data using a pre-stored lookup table and to modulate a voltage level of the modulated PWM data using a preset voltage value in response to the grayscale value of the input image is less than the reference grayscale value.

### Claim 3 (depends on 2)

The display device of claim 2, wherein:
each of the plurality of pixels includes at least one light-emitting element,
an anode electrode of the light-emitting element is connected to a scan line, and
a cathode electrode of the light-emitting element is connected to a data line.

### Claim 4 (depends on 2)

The display device of claim 2, wherein:
the line selection part includes a plurality of selection switch elements connected to each of the plurality of scan lines, and
the selection switch element includes a gate electrode connected to receive a line selection signal from the driving control part, a first electrode connected to a power line to which the driving voltage is applied, and a second electrode connected to the scan line.

### Claim 5 (depends on 2)

The display device of claim 2, further comprising:
a timing controller configured to control the operation timing of the line selection part and the drive IC,
wherein the driving control part is disposed inside the timing controller.