Liquid crystal display panel, display device and display method

• US 10,642,088 B2
• Filed: 07/24/2018
• Issued: 05/05/2020
• Est. Priority Date: 01/03/2018
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zou, Xiangxiang, Yang, Zezhou, Li, Xiaolong
• Primary Examiner(s): Gross, Alexander P
• Application Number:
  US16/043,773
• Publication Number:
  US 20190204663A1
• Time in Patent Office: 651 Days
• CPC Class Codes: G02F 1/01791 Quantum boxes or quantum dots
• CPC Class Codes: G02F 1/133509 Filters, e.g. light shielding masks
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/133602 Direct backlight
• CPC Class Codes: G02F 1/133616 Front illuminating devices
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell

Abstract

The present disclosure relates to a liquid crystal display panel, a display device, and a display method. The liquid crystal display panel includes: a first substrate and a second substrate opposed to each other; a liquid crystal layer located between the first substrate and the second substrate; and a quantum dot layer located on a side of the second substrate away from the liquid crystal layer, and including a plurality of quantum dots of different dimensions.

Claims

1. A liquid crystal display panel comprising:

a first substrate and a second substrate opposed to each other;

a liquid crystal layer located between the first substrate and the second substrate;

a quantum dot layer located on a side of the second substrate away from the liquid crystal layer, and comprising a plurality of quantum dots of different dimensions;

a light guide layer located on a side of the quantum dot layer away from the liquid crystal layer, and configured to guide light into the quantum dot layer, wherein the light is blue or ultraviolet light with a single wavelength for making the quantum dots in an excited state; and

a protective layer located on a side of the quantum dot layer away from the liquid crystal layer, and configured to reduce the blue or ultraviolet light emitted from the liquid crystal display panel.

2. The liquid crystal display panel according to claim 1, wherein a material for the first substrate comprises a reflective metal material.

3. The liquid crystal display panel according to claim 1, wherein a material for the quantum dots comprises at least one selected from a group consisting of IV, II-VI, III-V, and IV-VI group elements.

4. The liquid crystal display panel according to claim 1, further comprising:

polarizer layers respectively located on opposite sides of the liquid crystal layer.

5. The liquid crystal display panel according to claim 1, further comprising:

a filter layer located between the quantum dot layer and the liquid crystal layer, wherein the filter layer comprises a first filter pattern, a second filter pattern, and a third filter pattern.

6. The liquid crystal display panel according to claim 5, further comprising:

a transflective layer located on a side of the liquid crystal layer away from the filter layer.

7. The liquid crystal display panel according to claim 5, further comprising:

a transmissive layer located on a side of the liquid crystal layer away from the filter layer.

8. The liquid crystal display panel according to claim 5, wherein:

the quantum dot layer comprises a first region, a second region and a third region, positions of which correspond to positions of the first filter pattern, the second filter pattern and the third filter pattern respectively,

the dimensions of the quantum dots in the first region, the second region and the third region respectively correspond to a wavelength of the light capable of passing through the first filter pattern, the second filter pattern and the third filter pattern.

9. The liquid crystal display panel according to claim 8, wherein orthographic projections of the first region, the second region and the third region on a plane of the first substrate respectively coincide with those of the first filter pattern, the second filter pattern and the third filter pattern.

10. The liquid crystal display panel according to claim 5, further comprising:

a reflective layer located on a side of the liquid crystal layer away from the filter layer.

11. The liquid crystal display panel according to claim 10, wherein the reflective layer is metal wire grids.

12. A display device comprising:

the liquid crystal display panel according to claim 1.

13. The display device according to claim 12, further comprising:

a source located on a side of the first substrate away from the liquid crystal layer, and configured to alternately emit white light and blue or ultraviolet light with a single wavelength.

14. The display device according to claim 12, further comprising:

a first light source located on a side of the second substrate away from the liquid crystal layer, and configured to emit blue or ultraviolet light with a single wavelength.

15. The display device according to claim 14, further comprising:

a second light source located on a side of the first substrate away from the liquid crystal layer, and configured to emit white light.

16. A display method of a liquid crystal display panel comprising a liquid crystal layer located between a first substrate and a second substrate opposed to each other and a quantum dot layer located on a side of the second substrate away from the liquid crystal layer, the quantum dot layer comprising a plurality of quantum dots of different dimensions, a light guide layer located on a side of the quantum dot layer away from the liquid crystal layer and configured to guide light, which is blue or ultraviolet light with a single wavelength for making the quantum dots in an excited state, into the quantum dot layer, and a protective layer located on a side of the quantum dot layer away from the liquid crystal layer and configured to reduce the blue or ultraviolet light emitted from the liquid crystal display panel, the display method comprising:

making the quantum dots in the quantum dot layer in an excited state; and

causing the liquid crystal display panel to display an image.

17. The display method according to claim 16, wherein the quantum dot layer is illuminated by the blue or ultraviolet light with a single wavelength, to make the quantum dots in an excited state.