Method and system of measuring display panel, and display device

Patent metadata

Field	Value
Publication number	US-11990105-B2
Application number	US-201817262124-A
Country	US
Kind code	B2
Filing date	Dec 26, 2018
Priority date	Nov 20, 2018
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

A method and a system of measuring a display panel, and a display panel. The display panel includes a backlight module and a liquid crystal panel. The method of measuring the display panel includes determining a target position on a display panel that meets a preset condition, wherein the target position includes a first target position and a second target position, and a connecting line of the first target position and the second target position is parallel to a row of sub-pixels. The method further includes measuring brightness information at the target position under a constant applied voltage, wherein the brightness information includes brightness information of the backlight module and brightness information of the display panel, and a display efficiency of the display panel is calculated according to the brightness information.

First claim

What is claimed is:

1. A method of measuring a display panel, comprising:
determining a target position on the display panel that meets a preset condition by determining a first target position and a second target position on the display panel, wherein a connecting line of the first target position and the second target position is parallel to a row of sub-pixels, and wherein a distance between the first target position and the second target position is within a preset distance range;
measuring a brightness information at the target position under a constant applied voltage by:
measuring a first backlight brightness and a first display panel brightness at a first target position, wherein the first backlight brightness is a backlight brightness corresponding to the first target position when a liquid crystal panel is removed, and wherein the first display panel brightness is a brightness at the first target position of the display panel when the display panel retains an upper polarizer and a lower polarizer;
measuring a second backlight brightness and a second display panel brightness at a second target position, wherein the second backlight brightness is a backlight brightness corresponding to the second target position when a liquid crystal panel is removed, and wherein the second display panel brightness is a brightness at the second target position of the display panel when the display panel retains an upper polarizer and a lower polarizer;
measuring a third display panel brightness at the first target position, wherein the third display panel brightness is measured when the display panel removes an upper polarizer at the first target position;
measuring a fourth display panel brightness at the first target position, wherein the fourth display panel brightness is measured when the display panel removes a lower polarizer at the second target position;
measuring a fifth display panel brightness at the first target position, wherein the fifth display panel brightness is measured when the display panel removes an upper polarizer and a lower polarizer at the first target position; and
measuring a sixth display panel brightness at the first target position, wherein the sixth display panel brightness is measured when the display panel removes an upper polarizer and a lower polarizer at the second target position; and

calculating a display efficiency of the display panel according to the brightness information.

2. The method of claim 1 , wherein calculating the display efficiency of the display panel according to the brightness information comprises:
calculating a first display efficiency corresponding to a first target position according to brightness information of the first target position;
calculating a second display efficiency corresponding to a second target position according to brightness information of the second target position; and
calculating an average value of the first display efficiency and the second display efficiency to acquire the display efficiency of the display panel.

3. The method of claim 1 , wherein calculating the display efficiency of the display panel according to the brightness information comprises:
calculating a first light transmittance according to the first backlight brightness and the first display panel brightness;
calculating a second light transmittance according to the first backlight brightness and the third display panel brightness;
calculating a third light transmittance according to the second backlight brightness and the fourth display panel brightness;
calculating a fourth light transmittance according to the first backlight brightness and the fifth display panel brightness;
calculating a fifth light transmittance according to the second backlight brightness and the second display panel brightness;
calculating a sixth light transmittance according to the second backlight brightness and the sixth display panel brightness;
calculating the display efficiency corresponding to the first target position according to the first light transmittance, the second light transmittance, the third light transmittance, and the fourth light transmittance;
calculating the display efficiency corresponding to the second target position according to the fifth light transmittance, the second light transmittance, the third light transmittance, and the sixth light transmittance; and
calculating the display efficiency of the display panel according to the display efficiency corresponding to the first target position and the display efficiency corresponding to the second target position.

4. The method of claim 3 , wherein a first calculating formula for use in calculating the display efficiency corresponding to the first target position according to the first light transmittance, the second light transmittance, the third light transmittance, and the fourth light transmittance is:

η

LC
,
1

=

T
1

×

T
4

T
2

×

T
3

×
2

,

wherein η LC,1 represents the display efficiency corresponding to the first target position, T 1 represents the first light transmittance, T 2 represents the second light transmittance, T 3 represents the third light transmittance, and T 4 represents the fourth light transmittance, wherein a second calculating formula for use in calculating the display efficiency corresponding to the second target position according to the fifth light transmittance, the second light transmittance, the third light transmittance, and the sixth light transmittance is:

η

LC
,
2

=

T
5

×

T
6

T
2

×

T
3

×
2

,

wherein η LC,2 represents the display efficiency corresponding to the second target position, T 5 represents the fifth light transmittance, T 2 represents the second light transmittance, T 3 represents the third light transmittance, and T 6 represents the sixth light transmittance, wherein a third calculating formula for use in calculating the display efficiency of the display panel according to the display efficiency corresponding to the first target position and the display efficiency corresponding to the second target position is:

Assignees

• Hkc Corp Ltd

Inventors

• Song Zhenli

Classifications

• G09G5/10 Primary

  Intensity circuits · CPC title

• G01M11/08

  Testing mechanical properties {(G01M11/005 takes precedence)} · CPC title

• G01N21/59

  Transmissivity (G01N21/25 takes precedence) · CPC title

• G02F1/1309 Primary

  Repairing; Testing · CPC title

• G09G3/3607

  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