# US 12,603,051 B2 · Display panel driving method for adjusting sub-pixel row scanning duration based on image data, driving circuit, and display apparatus

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,603,051 B2
- Document ID: US12603051B2
- Status: Granted
- Kind: B2
- Application number: 18/977,226
- Filed: 2024-12-11
- Published: 2025-06-12
- Granted: 2026-04-14
- Earliest claimed: 2023-12-12
- Assignees: Hkc Corporation Limited
- Applicants: Hkc Corporation Limited
- Inventors: Bin Qiu; Junfeng Xie
- Web page: https://patentgrep.com/patent/US12603051B2

## CPC

- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/2074: {using sub-pixels}
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2340/0435: Change or adaptation of the frame rate of the video stream
- 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, a driving circuit, and a display apparatus are provided. The driving method is applicable to a driving circuit. The driving method includes the following. Image data of an image to-be-displayed is acquired. A necessary charging duration of each sub-pixel row according to the image data is determined. The n scan lines are controlled according to a preset sequence to sequentially scan the n sub-pixel rows, to drive the display panel to display the image to-be-displayed, where a scanning duration of each scan line is positively correlated to the necessary charging duration of a sub-pixel row corresponding to the scan line.

## Claims

### Claim 1

A driving method for a display panel, wherein the driving method is applicable to a driving circuit, the driving circuit is configured to drive the display panel to display, and the display panel comprises n scan lines extending in a row direction and n sub-pixel rows in one-to-one correspondence with the n scan lines, wherein n is an integer greater than 1, the driving method comprising:
acquiring image data of an image to be displayed;
determining a necessary charging duration of each sub-pixel row according to the image data; and
controlling, according to a preset sequence, the n scan lines to sequentially scan the n sub-pixel rows, to drive the display panel to display the image to be displayed, wherein a scanning duration of each scan line is positively correlated to the necessary charging duration of a sub-pixel row corresponding to the scan line,
wherein the determining the necessary charging duration of each sub-pixel row according to the image data, comprises:
determining a target grayscale of each sub-pixel according to the image data:
determining a sub-pixel with a highest target grayscale in each sub-pixel row as a target sub-pixel of the sub-pixel row:
determining a shortest charging duration of each target sub-pixel according to the target grayscale of each target sub-pixel; and
determining the shortest charging duration of each target sub-pixel as the necessary charging duration of a sub-pixel row where the target sub-pixel is located.

### Claim 2 (depends on 1)

The driving method for the display panel of claim 1, wherein a preset correspondence is stored in the driving circuit, and the preset correspondence comprises a one-to-one correspondence between a plurality of grayscales and a plurality of data voltages; and
wherein the determining the shortest charging duration of each target sub-pixel according to the target grayscale of each target sub-pixel comprises:
determining a target data voltage of each target sub-pixel according to the target grayscale of each target sub-pixel and the preset correspondence; and
determining the shortest charging duration of each target sub-pixel according to the target data voltage of each target sub-pixel.

### Claim 3 (depends on 2)

The driving method for the display panel of claim 2, wherein each sub-pixel comprises a storage capacitor, the storage capacitor has a first terminal configured to receive a power supply voltage, and the storage capacitor has a second terminal configured to receive a target data voltage of a sub-pixel when a scan line scans the sub-pixel; and
wherein the determining the shortest charging duration of each target sub-pixel according to the target data voltage of each target sub-pixel comprises:
determining, according to the target data voltage of each target sub-pixel and a first preset charging formula, the shortest charging duration of each target sub-pixel, wherein the first preset charging formula is: ti=|Vdi−VDD|×C/Imax wherein ti represents a shortest charging duration of a target sub-pixel in an i-th sub-pixel row, VDD represents the power supply voltage, Vdi represents a target data voltage of the target sub-pixel in the i-th sub-pixel row, C represents a capacitance of the storage capacitor, Imax represents a maximum charging current provided by the driving circuit, and 1≤i≤n.

### Claim 4 (depends on 3)

The driving method for the display panel of claim 3, wherein before the determining, according to the target data voltage of each target sub-pixel and the first preset charging formula, the shortest charging duration of each target sub-pixel, the driving method further comprises:
determining a highest data voltage corresponding to a highest grayscale from the preset correspondence; and
determining the maximum charging current provided by the driving circuit and according to the highest data voltage and a shortest scanning duration of the driving circuit, and wherein the shortest scanning duration is a scanning duration of one scan line when the driving circuit is at a maximum refresh rate.

### Claim 5 (depends on 4)

The driving method for the display panel of claim 4, wherein the determining the maximum charging current provided by the driving circuit according to the highest data voltage and the shortest scanning duration of the driving circuit comprises:
determining, according to the highest data voltage, the shortest scanning duration of the driving circuit, and a second preset charging formula, the maximum charging current provided by the driving circuit, wherein the second preset charging formula is: Imax=|Vdmax−VDD|×C/tmin, wherein Vdmax represents the highest data voltage, and tmin represents the shortest scanning duration.

### Claim 6 (depends on 3)

The driving method for the display panel of claim 3, wherein before the determining, according to the target data voltage of each target sub-pixel and the first preset charging formula, the shortest charging duration of each target sub-pixel, the driving method further comprises:
establishing a simulation model of the display panel, and obtaining the capacitance of the storage capacitor by performing simulation analysis on the simulation model.

### Claim 7 (depends on 1)

The driving method for the display panel of claim 1, wherein the scanning duration of each scan line is k times of the necessary charging duration of a sub-pixel row corresponding to the scan line, wherein k is an integer greater than or equal to 1.

### Claim 8

A driving circuit, wherein the driving circuit is configured to drive a display panel to display, and the display panel comprises n scan lines extending in a row direction and n sub-pixel rows in one-to-one correspondence with the n scan lines, wherein n is an integer greater than 1 the driving circuit comprising: a timing controller; and a scan driving circuit,
wherein the timing controller is configured to:
acquire image data of an image to be displayed;
determine a necessary charging duration of each sub-pixel row according to the image data; and
control, the scan driving circuit to control the n scan lines according to a preset sequence to sequentially scan the n sub-pixel rows, to drive the display panel to display the image to be displayed, wherein a scanning duration of each scan line is positively correlated to the necessary charging duration of a sub-pixel row corresponding to the scan line, and
wherein the timing controller configured to determine the necessary charging duration of each sub-pixel row according to the image data is configured to:
determine a target grayscale of each sub-pixel according to the image data:
determine a sub-pixel with a highest target grayscale in each sub-pixel row as a target sub-pixel of the sub-pixel row:
determine a shortest charging duration of each target sub-pixel according to the target grayscale of each target sub-pixel; and
determine the shortest charging duration of each target sub-pixel as the necessary charging duration of a sub-pixel row where the target sub-pixel is located.

### Claim 9 (depends on 8)

The driving circuit of claim 8, wherein a preset correspondence is stored in the driving circuit, and the preset correspondence comprises a one-to-one correspondence between a plurality of grayscales and a plurality of data voltages; and
wherein the timing controller configured to determine the shortest charging duration of each target sub-pixel according to the target grayscale of each target sub-pixel is configured to:
determine a target data voltage of each target sub-pixel according to the target grayscale of each target sub-pixel and the preset correspondence; and
determine the shortest charging duration of each target sub-pixel according to the target data voltage of each target sub-pixel.

### Claim 10 (depends on 9)

The driving circuit of claim 9, wherein each sub-pixel comprises a storage capacitor, the storage capacitor has a first terminal configured to receive a power supply voltage, and the storage capacitor has a second terminal configured to receive a target data voltage of a sub-pixel when a scan line scans the sub-pixel; and
wherein the timing controller configured to determine the shortest charging duration of each target sub-pixel according to the target data voltage of each target sub-pixel is configured to:
determine, according to the target data voltage of each target sub-pixel and a first preset charging formula, the shortest charging duration of each target sub-pixel, wherein the first preset charging formula is: ti=|Vdi−VDD|×C/Imax, wherein ti represents a shortest charging duration of a target sub-pixel in an i-th sub-pixel row, VDD represents the power supply voltage, Vdi represents a target data voltage of the target sub-pixel in the i-th sub-pixel row, C represents a capacitance of the storage capacitor, Imax represents a maximum charging current provided by the driving circuit, and 1≤i≤n.

### Claim 11 (depends on 10)

The driving circuit of claim 10, wherein before the timing controller configured to determine, according to the target data voltage of each target sub-pixel and the first preset charging formula, the shortest charging duration of each target sub-pixel, the driving circuit is configured to:
determine a highest data voltage corresponding to a highest grayscale from the preset correspondence; and
determine the maximum charging current provided by the driving circuit according to the highest data voltage and a shortest scanning duration of the driving circuit, wherein the shortest scanning duration is a scanning duration of one scan line when the driving circuit is at a maximum refresh rate.

### Claim 12 (depends on 11)

The driving circuit of claim 11, wherein in the timing controller configured to determine the maximum charging current provided by the driving circuit according to the highest data voltage and the shortest scanning duration of the driving circuit is configured to:
determine, according to the highest data voltage, the shortest scanning duration of the driving circuit, and a second preset charging formula, the maximum charging current provided by the driving circuit, wherein the second preset charging formula is: Imax=|Vdmax−VDD|×C/tmin, wherein Vdmax represents the highest data voltage, and tmin represents the shortest scanning duration.

### Claim 13 (depends on 10)

The driving circuit of claim 10, wherein before the timing controller configured to determine, according to the target data voltage of each target sub-pixel and the first preset charging formula, the shortest charging duration of each target sub-pixel, the timing controller is configured to:
establish a simulation model of the display panel, and obtain the capacitance of the storage capacitor by performing simulation analysis on the simulation model.

### Claim 14 (depends on 8)

The driving circuit of claim 8, wherein the scanning duration of each scan line is k times of the necessary charging duration of a sub-pixel row corresponding to the scan line, wherein k is an integer greater than or equal to 1.

### Claim 15

A display apparatus, comprising:
a display panel; and
a driving circuit, wherein the driving circuit is electrically connected to the display panel and the driving circuit is configured to drive a display panel to display, and the display panel comprises n scan lines extending in a row direction and n sub-pixel rows in one-to-one correspondence with the n scan lines, wherein n is an integer greater than 1, and the driving circuit is configured to:
acquire image data of an image to be displayed;
determine a necessary charging duration of each sub-pixel row according to the image data; and
control, according to a preset sequence, the n scan lines to sequentially scan the n sub-pixel rows, to drive the display panel to display the image to be displayed, wherein a scanning duration of each scan line is positively correlated to the necessary charging duration of a sub-pixel row corresponding to the scan line,
wherein the driving circuit configured to determine the necessary charging duration of each sub-pixel row according to the image data is configured to:
determine a target grayscale of each sub-pixel according to the image data;
determine a sub-pixel with a highest target grayscale in each sub-pixel row as a target sub-pixel of the sub-pixel row;
determine a shortest charging duration of each target sub-pixel according to the target grayscale of each target sub-pixel; and
determine the shortest charging duration of each target sub-pixel as the necessary charging duration of a sub-pixel row where the target sub-pixel is located.

### Claim 16 (depends on 15)

The display apparatus of claim 15, wherein a preset correspondence is stored in the driving circuit, and the preset correspondence comprises a one-to-one correspondence between a plurality of grayscales and a plurality of data voltages, and
wherein the driving circuit configured to determine the shortest charging duration of each target sub-pixel according to the target grayscale of each target sub-pixel is configured to:
determine a target data voltage of each target sub-pixel according to the target grayscale of each target sub-pixel and the preset correspondence; and
determine the shortest charging duration of each target sub-pixel according to the target data voltage of each target sub-pixel.

### Claim 17 (depends on 16)

The display apparatus of claim 16, wherein each sub-pixel comprises a storage capacitor, the storage capacitor has a first terminal configured to receive a power supply voltage, and the storage capacitor has a second terminal configured to receive a target data voltage of a sub-pixel when a scan line scans the sub-pixel, and
wherein the driving circuit configured to determine the shortest charging duration of each target sub-pixel according to the target data voltage of each target sub-pixel is configured to:
determine, according to the target data voltage of each target sub-pixel and a first preset charging formula, the shortest charging duration of each target sub-pixel, wherein the first preset charging formula is: ti=Vdi−VDD|×C/Imax, wherein ti represents a shortest charging duration of a target sub-pixel in an i-th sub-pixel row, VDD represents the power supply voltage, Vdi represents a target data voltage of the target sub-pixel in the i-th sub-pixel row, C represents a capacitance of the storage capacitor, Imax represents a maximum charging current provided by the driving circuit, and 1≤i≤n.