Response speed evaluation system for display device, response speed evaluation system for electronic device, and method driving the response speed evaluation system for the display device

Patent metadata

Field	Value
Publication number	US-2025372055-A1
Application number	US-202519080451-A
Country	US
Kind code	A1
Filing date	Mar 14, 2025
Priority date	Jun 3, 2024
Publication date	Dec 4, 2025
Grant date	—

Abstract

A response speed evaluation system for a display device includes the display device configured to display a dynamic video, and to display a static image generated based on input grayscales of the dynamic video, a luminance measurer configured to measure a luminance of the static images, to measure a luminance of the dynamic video, to generate static image graphs based on the luminance of the static images, and to generate a dynamic video graph based on the luminance of the dynamic video, and a response speed evaluator configured to generate an input graph based on the static image graphs, to generate an output graph based on the dynamic video graph, and to compare the input graph and the output graph to evaluate a response speed of the display device.

First claim

What is claimed is:

1 . A response speed evaluation system for a display device, comprising:
the display device configured to display a dynamic video, and to display a static image generated based on input grayscales of the dynamic video; a luminance measurer configured to measure a luminance of the static images, to measure a luminance of the dynamic video, to generate static image graphs based on the luminance of the static images, and to generate a dynamic video graph based on the luminance of the dynamic video; and a response speed evaluator configured to generate an input graph based on the static image graphs, to generate an output graph based on the dynamic video graph, and to compare the input graph and the output graph to evaluate a response speed of the display device.

2 . The response speed evaluation system for the display device of claim 1 , wherein the response speed evaluator is configured to scale the static image graphs based on a maximum luminance and a minimum luminance of the static image graphs to normalize the static image graphs.

3 . The response speed evaluation system for the display device of claim 1 , wherein the response speed evaluator is configured to calculate a representative value of a luminance of the static image graphs.

4 . The response speed evaluation system for the display device of claim 3 , wherein the representative value of the luminance of the static image graphs is a median value of the luminance of the static image graphs.

5 . The response speed evaluation system for the display device of claim 4 , wherein the response speed evaluator is configured to combine the static image graphs based on the representative value of the luminance of the static image graphs to generate the input graph.

6 . The response speed evaluation system for the display device of claim 1 , wherein the response speed evaluator is configured to scale the dynamic video graph based on a maximum luminance and a minimum luminance of the dynamic video graph to normalize the dynamic video, and to generate the output graph.

7 . The response speed evaluation system for the display device of claim 1 , wherein the response speed of the display device increases as similarity between the output graph and the input graph increases.

8 . The response speed evaluation system for the display device of claim 1 , wherein the response speed evaluator is configured to evaluate the response speed of the display device based on a difference between an area of the input graph and an area of the output graph.

9 . The response speed evaluation system for the display device of claim 8 , wherein the difference between the area of the input graph and the area of the output graph corresponds to a similarity index that is calculated by

S
IND

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OG

LUM

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IG

LUM

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S_IND being the similarity index, IG_LUM being a luminance of the input graph, and OG_LUM being a luminance of the output graph.

10 . The response speed evaluation system for the display device of claim 9 , wherein the difference between the area of the input graph and the area of the output graph decreases and the response speed of the display device increases as the similarity index increases.

11 . A response speed evaluation system for an electronic device, comprising:
the electronic device comprising a display device configured to display a dynamic video and to display a static image generated based on input grayscales of the dynamic video, and a processor configured to control the display device; a luminance measurer configured to measure a luminance of the static images, to measure a luminance of the dynamic video, to generate static image graphs based on the luminance of the static images, and to generate a dynamic video graph based on the luminance of the dynamic video; and a response speed evaluator configured to generate an input graph based on the static image graphs, to generate an output graph based on the dynamic video graph, and to compare the input graph and the output graph to evaluate a response speed of the display device.

12 . A method of driving a response speed evaluation system for a display device, the method comprising:
determining an input grayscale of static images based on input grayscales of a dynamic video; measuring a luminance of the static images; measuring a luminance of the dynamic video; generating static image graphs based on the luminance of the static images; generating a dynamic video graph based on the luminance of the dynamic video; generating an input graph based on the static image graphs; generating an output graph based on the dynamic video graph; and comparing the input graph and the output graph to evaluate a response speed of the display device.

13 . The method of claim 12 , wherein the generating the input graph and the generating the output graph comprises scaling the static image graphs based on a maximum luminance and a minimum luminance of the static image graphs to normalize the static image graphs.

14 . The method of claim 13 , wherein the generating the input graph and the generating the output graph further comprises calculating a representative value of a luminance of the static image graphs.

15 . The method of claim 14 , wherein the representative value of the luminance of the static image graphs comprises a median value of the luminance of the static image graphs.

16 . The method of claim 14 , wherein the generating the input graph and the generating the output graph further comprises combining the static image graphs based on the representative value of the luminance of the static image graphs to generate the input graph.

17 . The method of claim 16 , wherein the genera

Assignees

• Samsung Display Co Ltd

Inventors

• Yeom Dong-Yeol
• Kim Hyosun
• Yi Yongwoo

Classifications

• G09G3/006 Primary

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title

• G09G2320/103

  Detection of image changes, e.g. determination of an index representative of the image change · CPC title

• G09G2360/145

  the light originating from the display screen · CPC title

• G09G3/3607 Primary

  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) · CPC title

• G09G2320/0252

  Improving the response speed · CPC title