Parameter adjustment method of display module and system, display module, and display device

Patent metadata

Field	Value
Publication number	US-2024290260-A1
Application number	US-202218043467-A
Country	US
Kind code	A1
Filing date	Feb 24, 2022
Priority date	Feb 24, 2022
Publication date	Aug 29, 2024
Grant date	—

Abstract

A parameter adjustment method of a display module includes: setting an initial value of a light-emitting delay time and specified gray levels; based on the initial value of the light-emitting delay time, adjusting the light-emitting delay time stepwise until a value of an adjusted light-emitting delay time exceeds a preset range of the light-emitting delay time, so that values of the light-emitting delay time within the preset range of the light-emitting delay time are obtained; obtaining flicker values of the display module at the specified gray levels for each value of the light-emitting delay time; and determining a preferred value of the light-emitting delay time from the values of the light-emitting delay time according to flicker values corresponding to the values of the light-emitting delay time.

First claim

1 . A parameter adjustment method of a display module, wherein the display module is capable of operating in a low frequency driving mode, the low frequency driving mode includes a plurality of low frequency cycles, and a low frequency cycle includes a refresh frame and at least one keep frame;
the parameter adjustment method comprising: setting an initial value of a light-emitting delay time and a plurality of specified gray levels, wherein the light-emitting delay time is a time interval between a start of a charging period of a frame of the refresh frame and the at least one keep frame and a start of a light-emitting period of the frame; based on the initial value of the light-emitting delay time, adjusting the light-emitting delay time stepwise until a value of an adjusted light-emitting delay time exceeds a preset range of the light-emitting delay time, so that a plurality of values of the light-emitting delay time within the preset range of the light-emitting delay time are obtained; obtaining a plurality of flicker values of the display module at the plurality of specified gray levels for each value of the light-emitting delay time; and determining a preferred value of the light-emitting delay time from the plurality of values of the light-emitting delay time according to a plurality of flicker values corresponding to the plurality of values of the light-emitting delay time.

2 . The parameter adjustment method according to claim 1 , wherein obtaining the flicker values of the display module at the plurality of specified gray levels for each value of the light-emitting delay time, includes:
setting an initial value of a first initialization sub-signal, wherein the first initialization sub-signal is an initialization signal received by a light-emitting device included in the display module during the refresh frame; based on the initial value of the first initialization sub-signal, adjusting the first initialization sub-signal stepwise until a value of an adjusted first initialization sub-signal exceeds a preset range of the first initialization sub-signal, so that a plurality of values of the first initialization sub-signal within the preset range of the first initialization sub-signal are obtained, wherein a number of the plurality of values of the light-emitting delay time is M, a number of the plurality of values of the first initialization sub-signal is N, the M values of the light-emitting delay time and the N values of the first initialization sub-signal are divided into M×N first parameter groups, and a first parameter group includes a single value of the light-emitting delay time and a single value of the first initialization sub-signal; and obtaining the plurality of flicker values of the display module at the plurality of specified gray levels for each first parameter group of the M×N first parameter groups.

3 . The parameter adjustment method according to claim 2 , wherein flicker values corresponding to a single first parameter group constitute a single set of flicker values;
determining the preferred value of the light-emitting delay time from the plurality of values of the light-emitting delay time according to the plurality of flicker values corresponding to the plurality of values of the light-emitting delay time, includes: determining a target value of the light-emitting delay time corresponding to each value of the first initialization sub-signal from the M values of the light-emitting delay time, so as to obtain a plurality of target values of the light-emitting delay time, wherein the target value of the light-emitting delay time is a value of the light-emitting delay time corresponding to a set of flicker values with a highest convergence in M sets of flicker values, and the M sets of flicker values corresponds to the M values of the light-emitting delay time and each include the value of the first initialization sub-signal; determining a preferred value of the first initialization sub-signal, wherein the preferred value of the first initialization sub-signal is one of the N values of the first initialization sub-signal; and determining a target value of the light-emitting delay time corresponding to the preferred value of the first initialization sub-signal as a preferred value of the light-emitting delay time.

4 . The parameter adjustment method according to claim 3 , wherein determining the preferred value of the first initialization sub-signal from the N values of the first initialization sub-signal, includes:
obtaining a plurality of values of a second initialization sub-signal; determining one value of the plurality of values of the second initialization sub-signal as a preferred value of the second initialization sub-signal, wherein the second initialization sub-signal is an initialization signal received by the light-emitting device during a keep frame; for the preferred value of the second initialization sub-signal, obtaining N flicker values at a target gray level corresponding to the N values of the first initialization sub-signal, wherein the target gray level is one of the plurality of specified gray levels; and determining a value of the first initialization sub-signal corresponding to a minimum flicker value of the N flicker values as the preferred value of the first initialization sub-signal.

5 . The parameter adjustment method according to claim 4 , wherein obtaining the plurality of values of the second initialization sub-signal includes:
setting an initial value of the second initialization sub-signal; and based on the initial value of the second initialization sub-signal, adjusting the second initialization sub-signal stepwise until a value of an adjusted second initialization sub-signal exceeds a preset range of the second initialization sub-signal, so that the plurality of values of the second initialization sub-signal within the preset range of the second initialization sub-signal are obtained, wherein the number of the plurality of values of the first initialization sub-signal is N, a number of the plurality of values of the second initialization sub-signal is K, the N values of the first initialization sub-signal and the K values of the second initialization sub-signal are divided into N×K second parameter groups, and a second parameter group includes one value of the first initialization sub-signal and one value of the second initialization sub-signal; determining the one value of the plurality of values of the second initialization sub-signal as the preferred value of the second initialization sub-signal, includes: obtaining a plurality of flicker values of the display module at the plurality of specified gray levels for a target value of the plurality of target values of the light-emitting delay time and each second parameter group of the N×K second parameter groups; selecting a specified gray level from the plurality of specified gray levels as the target gray level, wherein in flicker values at the target gray level for the N values of the first initialization sub-signal and each value of the second initialization sub-signal, a difference between a maximum flicker value and a minimum flicker value is within a first preset threshold range; and/or, a flicker value at the target gray level for each of the second parameter groups are within a second preset threshold range; and determining a value of the second initialization sub-signal from the plurality of values of the second initialization sub-signal as the preferred value of the second initialization sub-signal, wherein a range of flicker values of the display module at the target gray level for the value of the second initialization sub-signal is maximum.

6 . The parameter adjustment method according to claim 4 , wherein obtaining the plurality values of the second initialization s

Assignees

• Boe Technology Group Co Ltd

Inventors

• Shang Guangliang
• Wang Li
• Wu Baoyun
• Zhao Xiyu
• Feng Yu
• Liu Libin
• Shi Shiming

Classifications

• G09G3/3233 Primary

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• G09G2330/021

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• G09G2320/0247

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• G09G2310/08

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