Optical property detecting method of liquid crystal display panel

Patent metadata

Field	Value
Publication number	US-12422704-B2
Application number	US-202217758222-A
Country	US
Kind code	B2
Filing date	Jun 6, 2022
Priority date	May 17, 2022
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

An optical property detecting method of a liquid crystal display panel is provided, and includes: measuring a spectrum of a first backlight panel and a spectrum of the a liquid crystal module; calculating a transmission spectrum of a target liquid crystal display panel; obtaining a spectrum of a second backlight panel; calculating and obtaining a tristimulus value of a second liquid crystal module; obtaining a plurality of optical parameters corresponding to the target liquid crystal display panel according to the tristimulus value, so as to detect an optical property of the target liquid crystal display panel.

First claim

What is claimed is:

1. An optical property detecting method of a liquid crystal display panel for detecting an optical property of a target liquid crystal display panel, the optical property detecting method comprises:
measuring a spectrum of a first backlight panel and a spectrum of a first liquid crystal module, wherein the first liquid crystal module comprises the first backlight panel and the target liquid crystal display panel;
calculating and obtaining a transmission spectrum of the target liquid crystal display panel according to the spectrum of the first backlight panel and the spectrum of the first liquid crystal module;
obtaining a spectrum of a second backlight panel;
calculating and obtaining a tristimulus value of a second liquid crystal module according to the transmission spectrum of the target liquid crystal display panel and the spectrum of the second backlight panel, wherein the second liquid crystal module comprises the second backlight panel and the target liquid crystal display panel; and
obtaining a plurality of optical parameters corresponding to the target liquid crystal display panel according to the tristimulus value, so as to detect an optical property of the target liquid crystal display panel.

2. The optical property detecting method according to claim 1 , wherein a step of measuring the spectrum of the first backlight panel and the spectrum of the first liquid crystal module comprises:
measuring the spectrum of the first backlight panel; and
measuring a corresponding spectrum of the first liquid crystal module when displaying a target color.

3. The optical property detecting method according to claim 2 , wherein a step of calculating and obtaining the transmission spectrum of the target liquid crystal display panel according to the spectrum of the first backlight panel and the spectrum of the first liquid crystal module comprises:
dividing the corresponding spectrum of the first liquid crystal module when displaying the target color by the spectrum of the first backlight panel to obtain a corresponding transmission spectrum of the target liquid crystal display panel when displaying the target color.

4. The optical property detecting method according to claim 3 , wherein the target color comprises red, green, and blue, and a step of dividing the corresponding spectrum of the first liquid crystal module when displaying the target color by the spectrum of the first backlight panel to obtain the corresponding transmission spectrum of the target liquid crystal display panel comprises:
dividing the corresponding spectrum of the first liquid crystal module when displaying red by the spectrum of the first backlight panel to obtain a corresponding red transmission spectrum of the target liquid crystal display panel when being penetrated by red light;
dividing the corresponding spectrum of the first liquid crystal module when displaying green by the spectrum of the first backlight panel to obtain a corresponding green transmission spectrum of the target liquid crystal display panel when being penetrated by green light; and
dividing the corresponding spectrum of the first liquid crystal module when displaying blue by the spectrum of the first backlight panel to obtain a corresponding blue transmission spectrum of the target liquid crystal display panel when being penetrated by blue light.

5. The optical property detecting method according to claim 4 , wherein the target color comprises red, green, and blue, and the step of dividing the corresponding spectrum of the first liquid crystal module when displaying the target color by the spectrum of the first backlight panel to obtain the corresponding transmission spectrum of the target liquid crystal display panel further comprises:
dividing the corresponding spectrum of the first liquid crystal module when displaying white by the spectrum of the first backlight panel to obtain a corresponding white transmission spectrum of the target liquid crystal display panel when being penetrated by white light.

6. The optical property detecting method according to claim 3 , wherein a step of calculating and obtaining the tristimulus value of the second liquid crystal module according to the transmission spectrum of the target liquid crystal display panel and the spectrum of the second backlight panel comprises:
substituting the transmission spectrum of the target liquid crystal display panel and the spectrum of the second backlight panel into a calculation model, and calculating to obtain the tristimulus value of the second liquid crystal module; wherein the tristimulus value comprises a red primary color stimulus value, a green primary color stimulus value, and a blue primary color stimulus value, and the calculation model is:

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Assignees

• Shenzhen China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Hai Bo

Classifications

• G01M11/02 Primary

  Testing optical properties · CPC title

• G02F1/1309 Primary

  Repairing; Testing · CPC title