Colorimetry calculation method and chroma calculation method for display

Patent metadata

Field	Value
Publication number	US-10288485-B2
Application number	US-201715737296-A
Country	US
Kind code	B2
Filing date	Oct 20, 2017
Priority date	Apr 26, 2017
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

The present disclosure discloses a colorimetry calculation method for a display. The display includes a quantum dot backlight module and a first polarizer, wherein the quantum dot backlight module includes a light guide plate, a quantum dot thin film layer, and a backlight. The method obtains the correction spectrum of the quantum dot backlight module, and obtains the true spectrum of the quantum dot backlight module when the first polarizer is arranged on the light exit side of the quantum dot backlight module based on the correction spectrum and the measurement spectrum, that is, the modified spectrum, so as to accurately simulate the chromatic offset phenomenon due to the secondary excitation of the first polarizer, and provide the basis for the quantitative design of the display including the quantum dot backlight module. The present disclosure also discloses a chromaticity calculation method of a display.

First claim

What is claimed is:

1. A colorimetric calculation method for a display, wherein the display comprises a quantum dot backlight module and a first polarizer arranged on the light exit side of the quantum dot backlight module, wherein the quantum dot backlight module comprises a light guide plate, a quantum dot thin film layer arranged on the light exit side of the light guide plate, and a backlight arranged on the light entrance side of the light guide plate;
the method comprising:
providing a reference polarizer, wherein the reference polarizer is different from the first polarizer;
measuring the quantum dot backlight module by the reference polarizer and the first polarizer, respectively, to extract a correction spectrum caused by the first polarizer in the display;
measuring the quantum dot backlight module to obtain a measurement spectrum of the quantum dot backlight module;
obtaining a modified spectrum of the quantum dot backlight module based on the measured spectrum and the correction spectrum; and
using the modified spectrum to calculate the chromaticity, brightness, and color gamut of the display;
wherein the measuring the quantum dot backlight module by the reference polarizer and the first polarizer to extract a correction spectrum caused by the first polarizer in the display comprising:
arranging the first polarizer on the light exit side of the quantum dot backlight module and measuring the quantum dot backlight module to obtain a first spectrum of the quantum dot backlight module;
arranging the reference polarizer to the light exit side of the quantum dot backlight module and measuring the quantum dot backlight module to obtain a second spectrum of the quantum dot backlight module; and
calculating the correction spectrum based on the first spectrum and the second spectrum;
wherein the first polarizer comprises an advanced polarization conversion film (APCF) and a polarizer, and the reference polarizer comprises only a polarizer;
wherein the obtaining a modified spectrum of the quantum dot backlight module based on the measured spectrum and the correction spectrum, comprising:
multiplying the measured spectrum with the correction spectrum to obtain the modified spectrum.

2. The method according to claim 1 , wherein the correction spectrum is calculated as: a=b/c, wherein a represents the correction spectrum, b represents the first spectrum, and c represents the second spectrum.

3. The method according to claim 1 , wherein the display further comprises a liquid crystal cell structure;
wherein the first polarizing plate and the reference polarizing plate coincide with a lower polarizing absorption axis of the liquid crystal cell structure, respectively.

4. The method according to claim 3 , wherein the chromaticity, brightness, and color gamut of the display are calculated using the correction spectrum, comprising:
multiplying the modified spectrum with the transmittance spectrum of red, green and blue in the liquid crystal cell structure, respectively, to calculate the chromaticity, luminance and color gamut of the display.

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Zha Guowei

Classifications

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G01J3/0224

  using polarising or depolarising elements · CPC title

• G01J2003/467

  Colour computing · CPC title

• G02F1/1309

  Repairing; Testing · CPC title

• G02B6/0056

  for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements · CPC title