Method, system, device, apparatus and medium for driving LED display screen

Patent metadata

Field	Value
Publication number	US-12592182-B2
Application number	US-202318878868-A
Country	US
Kind code	B2
Filing date	Jun 21, 2023
Priority date	Jun 24, 2022
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

Disclosed is a method, a system, a device, an apparatus and a medium for driving an LED display screen. When the total grayscale value of an LED lamp bead is greater than a grayscale threshold value, the sub-grayscale value of the LED lamp bead is determined based on a total grayscale value of the LED lamp bead, a total number of sub-frames and a grayscale growth sequence number of each sub-frame image, otherwise, the sub-grayscale value of the LED lamp bead is determined according to the total grayscale value of the LED lamp bead, the grayscale non-dispersion threshold value and the grayscale growth sequence number of each sub-frame image; according to the sub-grayscale value of each LED lamp bead in each sub-frame image, the LED display screen is driven to display each sub-frame image, so that the grayscale value can be uniformly dispersed, and image display quality is improved.

First claim

The invention claimed is:

1 . A method for driving an LED display screen, comprising:
for each LED lamp bead in the LED display screen, if it is determined that a total grayscale value of that LED lamp bead in a target frame image is greater than a grayscale threshold value, determining a sub-grayscale value of that LED lamp bead in each sub-frame image of the target frame image according to the total grayscale value of that LED lamp bead in the target frame image, a total number of sub-frames of the target frame image and a grayscale growth sequence number of each sub-frame image of the target frame image; if it is determined that the total grayscale value of the LED lamp bead in the target frame image is not greater than the grayscale threshold value, determining the sub-grayscale value of that LED lamp bead in each sub-frame image of the target frame image according to the total grayscale value of that LED lamp bead in the target frame image, a grayscale non-dispersion threshold value and the grayscale growth sequence number of each sub-frame image of the target frame image; wherein the grayscale growth sequence number of each sub-frame image is a parameter which is determined according to a sub-frame sequence number of that sub-frame image and represents grayscale allocation priority of the sub-frame image; and driving the LED display screen to sequentially display each sub-frame image of the target frame image according to the sub-grayscale value of each LED lamp bead in the LED display screen in each sub-frame image of the target frame image, wherein the method for driving the LED display screen further comprises: determining a product of the grayscale non-dispersion threshold value and the total number of the sub-frames as the grayscale threshold value, wherein the total number of the sub-frames is a natural number selected from 1 to 512; the grayscale non-dispersion threshold value is a natural number greater than 1 when a non-dispersion mode at low grayscale is enabled, and the grayscale non-dispersion threshold value is equal to 1 when the non-dispersion mode at low grayscale is not enabled.

2 . The method for driving the LED display screen according to claim 1 , further comprising:
for each sub-frame image of the target frame image, performing high-low bit flip operation on a binary number of the sub-frame sequence number of that sub-frame image to obtain a mirrored sub-frame sequence number of that sub-frame image, and determining the grayscale growth sequence number of that sub-frame image according to the mirrored sub-frame sequence number of that sub-frame image.

3 . The method for driving the LED display screen according to claim 2 , wherein determining the grayscale growth sequence number of the sub-frame image according to the mirrored sub-frame sequence number of the sub-frame image comprises:
if it is determined that the mirrored sub-frame sequence number of the sub-frame image is less than the total number of the sub-frames, determining the mirrored sub-frame sequence number of the sub-frame image as the grayscale growth sequence number of the sub-frame image; if it is determined that the mirrored sub-frame sequence number of the sub-frame image is not less than the total number of the sub-frames, iteratively performing a sequence number increment operation on the sub-frame sequence number of the sub-frame image, until it is determined that the mirrored sub-frame sequence number of an intermediate sub-frame sequence number obtained by performing the sequence number increment operation is less than the total number of the sub-frames, determining the mirrored sub-frame sequence number of the intermediate sub-frame sequence number obtained from the sequence number increment operation performed for a last time as the grayscale growth sequence number of the sub-frame image; wherein the sequence number increment operation comprises: incrementing by a first value.

4 . The method for driving the LED display screen according to claim 1 , wherein determining the sub-grayscale value of the LED lamp bead in each sub-frame image of the target frame image according to the total grayscale value of the LED lamp bead in the target frame image, the total number of the sub-frames of the target frame image, and the grayscale growth sequence number of each sub-frame image of the target frame image, comprises:
performing a division operation on the total grayscale value of the LED lamp bead in the target frame image and the total number of the sub-frames of the target frame image to obtain a first quotient value and a first remainder; for each sub-frame image of the target frame image, if it is determined that the first remainder is greater than the grayscale growth sequence number of the sub-frame image, setting the sub-grayscale value of the LED lamp bead in the sub-frame image to a sum of the first quotient value and a second value; if it is determined that the first remainder is not greater than the grayscale growth sequence number of the sub-frame image, setting the sub-grayscale value of the LED lamp bead in the sub-frame image to the first quotient value.

5 . The method for driving the LED display screen according to claim 1 , wherein determining the sub-grayscale value of the LED lamp bead in each sub-frame image of the target frame image according to the total grayscale value of the LED lamp bead in the target frame image, the grayscale non-dispersion threshold value and the grayscale growth sequence number of each sub-frame image of the target frame image comprises:
performing a division operation on the total grayscale value of the LED lamp bead in the target frame image and the grayscale non-dispersion threshold value to obtain a second quotient value and a second remainder; for each sub-frame image of the target frame image, if it is determined that the second quotient value is greater than the grayscale growth sequence number of the sub-frame image, setting the sub-grayscale value of the LED lamp bead in the sub-frame image to the grayscale non-dispersion threshold value; if it is determined that the second quotient value is equal to the grayscale growth sequence number of the sub-frame image, setting the sub-grayscale value of the LED lamp bead in the sub-frame image to the second remainder; if the second quotient value is determined to be less than the grayscale growth sequence number of the sub-frame image, setting the sub-grayscale value of the LED lamp bead in the sub-frame image to 0.

6 . The method for driving the LED display screen according to claim 1 , wherein the method is applied to any one of an LED display screen, a micro LED display screen, a mini LED display screen, a quantum dot LED display screen and an organic LED display screen.

7 . A system for driving an LED display screen, comprising:
a memory, configured to store a grayscale non-dispersion threshold value, a total number of sub-frames of a target frame image and a total grayscale value of each LED lamp bead in the LED display screen in the target frame image; a sub-frame counter, configured to generate a sub-frame sequence number of each sub-frame image of the target frame image; a growth counter, configured to generate a grayscale growth sequence number representing a grayscale allocation priority corresponding to each sub-frame image of the target frame image according to the sub-frame sequence number of each sub-frame image of the target frame image; a comparator, configured to respectively comparing the total grayscale value of each LED lamp bead stored in the memory in the target frame image with a grayscale threshold value, and output a corresponding comparison result for each LED lamp bead; a selector, configured to select one of the grayscale non-dispersion threshold val

Assignees

• Chipone Technology Beijing Co Ltd

Inventors

• Zhang Hao

Classifications

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G2320/0247

  Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes · CPC title

• G09G2300/0814

  used for selection purposes, e.g. logical AND for partial update · CPC title

• G09G2300/0819

  used for counteracting undesired variations, e.g. feedback or autozeroing · CPC title

• G09G3/2003

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title