Reflection rate detection device and reflection rate detection method for liquid crystal panel

Patent metadata

Field	Value
Publication number	US-11977285-B2
Application number	US-202017047725-A
Country	US
Kind code	B2
Filing date	Aug 21, 2020
Priority date	Aug 7, 2020
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

A reflection rate detection device and reflection rate detection method for a liquid crystal panel are provided by embodiments of the present application. A sphere of the liquid crystal panel is a hollow sphere, and an inner wall of the sphere is uniformly sprayed with diffuse reflection materials. The sphere is provided with a window hole, and the window hole corresponds to the liquid crystal panel. The emitting light source is disposed on the sphere, the emitting light source is configured to emit light, and emitted light enters the liquid crystal panel. The receiver is configured to receive reflection energy of the liquid crystal panel. A reflection rate of a large-area liquid crystal panel can be detected by the present application.

First claim

What is claimed is:

1. A reflection rate detection device for a liquid crystal panel, comprising:
a sphere, wherein the sphere is a hollow sphere, an inner wall of the sphere is uniformly sprayed with diffuse reflection materials, and the sphere is formed with a window hole corresponding to the liquid crystal panel;
an emitting light source disposed on the sphere, wherein the emitting light source is configured to emit light and emitted light enters the liquid crystal panel; and
a receiver configured to receive a reflection energy of the liquid crystal panel,
wherein the emitting light source comprises a second light source, the second light source is provided with a collimating device at a front end thereof, the second light source is arranged outside the sphere and located at a lower end of the sphere, an incident light of the second light source strikes to an inside of the sphere, a mirror reflection device is disposed on the inside of the sphere, the minor reflection device reflects the incident light to the liquid crystal panel, and the liquid crystal panel reflects the light to the receiver.

2. The reflection rate detection device for the liquid crystal panel according to claim 1 , wherein the emitting light source comprises a first light source, and the first light source scatters light to the liquid crystal panel and the inner wall of the sphere.

3. The reflection rate detection device for the liquid crystal panel according to claim 1 , wherein the emitting light source comprises a second light source, the second light source is provided with a collimating device at a front end thereof, the second light source is disposed on the sphere and located at an upper end of the sphere, an incident light of the second light source directly strikes toward the liquid crystal panel, and the liquid crystal panel reflects the light to the receiver.

4. The reflection rate detection device for the liquid crystal panel according to claim 1 , wherein an incident angle of the incident light of the second light source to the liquid crystal panel is 7 to 10 degrees.

5. The reflection rate detection device for the liquid crystal panel according to claim 1 , wherein the emitting light source comprises a first light source and a second light source, the first light source scatters light to the liquid crystal panel and the inner wall of the sphere, the second light source is disposed on or outside of the sphere, an incident light of the second light source directly strikes toward the liquid crystal panel, and the liquid crystal panel reflects the light to the receiver.

6. The reflection rate detection device for the liquid crystal panel according to claim 1 , wherein a grating is disposed at a front end of the receiver.

7. The reflection rate detection device for the liquid crystal panel according to claim 5 , wherein the first light source is a scattering light source, and the second light source is a direct light source.

8. The reflection rate detection device for the liquid crystal panel according to claim 1 , wherein a total reflection energy of reflection energies of a liquid crystal panel to be tested and a calibration plate are respectively obtained by the receiver, and a total reflection rate of the liquid crystal panel to be tested is obtained by dividing the reflection energy of the liquid crystal panel to be tested by the total reflection energy of the calibration plate.

9. A reflection rate detection method for a liquid crystal panel, wherein a reflection rate detection device for the liquid crystal panel is configured to detect, the reflection rate detection device for the liquid crystal panel comprises a sphere, an emitting light source, and a receiver, the sphere is a hollow sphere, an inner wall of the sphere is uniformly sprayed with diffuse reflection materials, the sphere is disposed with a window hole corresponding to the liquid crystal panel, the emitting light source is disposed on the sphere, the emitting light source is configured to emit light, the emitted light enters the liquid crystal panel, the receiver is configured to receive a reflection energy of the liquid crystal panel, and the detection method comprises following steps:
obtaining a reflection energy of a calibration plate by using the reflection rate detection device for the liquid crystal panel;
obtaining a reflection energy of a liquid crystal panel to be tested by using the reflection rate detection device for the liquid crystal panel; and
obtaining a reflection rate of the liquid crystal panel according to a specular reflection energy of the calibration plate and the reflection energy of the liquid crystal panel to be tested, wherein the reflection rate comprises a total reflection rate and a specular reflection rate,
wherein the emitting light source comprises a second light source, a front end of the second light source is provided with a collimating device, the second light source is disposed outside the sphere and located at a lower end of the sphere, an incident light of the second light source strikes an inside of the sphere, a mirror reflection device is disposed on the inside of the sphere, the minor reflection device reflects the incident light to the liquid crystal panel, and the liquid crystal panel reflects the light to the receiver.

10. The reflection rate detection method for the liquid crystal panel according to claim 9 , wherein obtaining the reflection energy of the calibration plate by using the reflection rate detection device for the liquid crystal panel comprises:
turning on a first light source and turning off a second light source, and obtaining a total reflection energy of specular reflection of the calibration plate by the receiver; and
obtaining the reflection energy of the liquid crystal panel to be tested by using the reflection rate detection device for the liquid crystal panel comprises:
turning on the first light source and turning off the second light source, and obtaining a total reflection energy of the liquid crystal panel to be tested by the receiver.

11. The reflection rate detection method for the liquid crystal panel according to claim 9 , wherein obtaining the reflection energy of the calibration plate by using the reflection rate detection device for the liquid crystal panel comprises:
turning on a second light source and turning off a first light source, and obtaining the specular reflection energy of the calibration plate by the receiver; and
obtaining the reflection energy of the liquid crystal panel to be tested by using the reflection rate detection device for the liquid crystal panel comprises:
turning on the second light source and turning off the first light source, and obtaining a specular reflection energy of the liquid crystal panel to be tested by the receiver.

12. The reflection rate detection method for the liquid crystal panel according to claim 9 , wherein obtaining the reflection rate of the liquid crystal panel according to the specular reflection energy of the calibration plate and the reflection energy of the liquid crystal panel to be tested, wherein the reflection rate comprises the total reflection rate and the specular reflection rate comprises:
dividing a specular reflection energy of the liquid crystal panel to be tested by the specular reflection energy of the calibration plate, and obtaining a specular reflection rate of the liquid crystal panel to be tested.

13. The reflection rate detection method for the liquid crystal panel according to claim 9 , wherein the emitting light source comprises a first light source, and the first light source scatters light to the liquid crystal panel and the inner wall of the sphe

Assignees

• Shenzhen China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Hai Bo

Classifications

• G02F1/1309 Primary

  Repairing; Testing · CPC title

• G01M11/005

  Testing of reflective surfaces, e.g. mirrors · CPC title

• G02B5/10

  with curved faces · CPC title

• G01N21/55 Primary

  Specular reflectivity · CPC title

• G01N2201/065

  Integrating spheres · CPC title