Color film substrate, array substrate, display device, and method for controlling the display device

• US 10,394,078 B2
• Filed: 08/21/2017
• Issued: 08/27/2019
• Est. Priority Date: 01/03/2017
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectric Technology Co. Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Jiang, Liangliang, Guo, Lei, Dai, Ke
• Primary Examiner(s): Liu, Shan
• Application Number:
  US15/755,944
• Publication Number:
  US 20180335664A1
• Time in Patent Office: 736 Days
• Field of Search: 349 69- 71, 349106-111
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133609 including means for improving the color mixing, e.g. white
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence
• CPC Class Codes: G02F 1/133624 characterised by their spectral emissions
• CPC Class Codes: G02F 1/133626 providing two modes of illumination, e.g. day-night
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2203/11 involving infrared radiation

Abstract

Embodiments of the disclosure relate to a color film substrate, an array substrate, a display device, and a method for controlling the display device. The color film substrate comprises a substrate; and a red block, a green block, a blue block and a white block on the substrate, wherein the white block is provided with light-emitting particles dispersed therein or on the surface thereof, and the light-emitting particles are capable of emitting yellow light upon the excitation of incident light.

Claims

1. A display device, comprising:

a color film substrate including a substrate, and a red block, a green block, a blue block and a white block positioned on the substrate;

an array substrate positioned opposite to the color film substrate;

a liquid crystal layer positioned between the color film substrate and the array substrate;

a first backlight unit and a second backlight unit positioned on a side of the array substrate away from the liquid crystal layer; and

a control unit connected to the first backlight unit and the second backlight unit;

wherein the white block includes light-emitting particles dispersed therein or on the surface thereof, the light-emitting particles capable of emitting yellow light upon the excitation of incident light;

wherein the light-emitting particles comprise holmium ytterbium co-doped Gd2Mo3O9 phosphor particles, and wherein a wavelength of the incident light ranges from about 900 nm to about 1100 nm;

wherein the first backlight unit is configured to emit white light, and the second backlight unit is configured to emit the incident light that excites the light-emitting particles to emit yellow light; and

wherein the control unit is configured to control the display device to switch between a first operation mode and a second operation mode, in the first operation mode the control unit is configured to control both the first backlight unit and the second backlight unit to turn on, and in the second operation mode the control unit is configured to control the first backlight unit to turn on and to control the second backlight unit to turn off.

2. The display device according to claim 1, wherein the wavelength of the incident light is about 980 nm.

3. The display device according to claim 1, wherein the white block comprises about 5-8% by weight of a resin;

about 5-8% by weight of a multifunctional monomer;

about 0.2-0.6% by weight of a photoinitiator;

about 3-5% by weight of a dispersant;

about 70-80% by weight of a solvent; and

about 0.1-0.2% by weight of an additive, and a proportion of the light-emitting particles in the white block is about 5-20% by weight.

4. The display device according to claim 1, wherein the second backlight unit comprises a laser LED capable of emitting light in a wavelength range of about 900 nm to about 1100 nm.

5. The display device according to claim 1, wherein the first backlight unit comprises a blue LED and YAG powder coated on the blue LED.

6. A method for controlling the display device according to claim 1, the method comprising:

controlling the display device to switch between the first operation mode and the second operation mode, wherein in the first operation mode both the first backlight unit and the second backlight unit are turned on, and in the second operation mode the first backlight unit is turned on and the second backlight unit is turned off.

7. The method according to claim 6, wherein the second backlight unit comprises a laser LED capable of emitting light in a wavelength range of about 900 nm to about 1100 nm.

8. A display device comprising:

an array substrate including a substrate, thin film transistors arranged in an array on the substrate, and a red block, a green block, a blue block and a white block positioned on the substrate;

an opposite substrate positioned opposite to the array substrate;

a liquid crystal layer positioned between the opposite substrate and the array substrate;

a first backlight unit and a second backlight unit positioned on a side of the array substrate away from the liquid crystal layer; and

a control unit connected to the first backlight unit and the second backlight unit;

wherein the white block includes light-emitting particles dispersed therein or on the surface thereof, the light-emitting particles capable of emitting yellow light upon the excitation of incident light;

wherein the light-emitting particles comprise holmium ytterbium co-doped Gd2Mo3O9 phosphor particles, and wherein a wavelength of the incident light ranges from about 900 nm to about 1100 nm;

wherein the first backlight unit is configured to emit white light, and the second backlight unit is configured to emit the incident light that excites the light-emitting particles to emit yellow light; and

wherein the control unit is configured to control the display device to switch between a first operation mode and a second operation mode, in the first operation mode the control unit is configured to control both the first backlight unit and the second backlight unit to turn on, and in the second operation mode the control unit is configured to control the first backlight unit to turn on and to control the second backlight unit to turn off.

9. The display device according to claim 8, wherein the wavelength of the incident light is about 980 nm.

10. The display device according to claim 8, wherein, the white block comprises about 5-8% by weight of a resin;

about 5-8% by weight of a multifunctional monomer;

about 0.2-0.6% by weight of a photoinitiator;

about 3-5% by weight of a dispersant;

about 70-80% by weight of a solvent; and

about 0.1-0.2% by weight of an additive, and a proportion of the light-emitting particles in the white block is about 5-20% by weight.

11. The display device according to claim 8, wherein the second backlight unit comprises a laser LED capable of emitting light in a wavelength range of about 900 nm to about 1100 nm.

12. The display device according to claim 8, wherein the first backlight unit comprises a blue LED and YAG powder coated on the blue LED.

13. A method for controlling the display device according to claim 8, the method comprising:

controlling the display device to switch between the first operation mode and the second operation mode, wherein in the first operation mode both the first backlight unit and the second backlight unit are turned on, and in the second operation mode the first backlight unit is turned on and the second backlight unit is turned off.

14. The method according to claim 13, the second backlight unit comprises a laser LED capable of emitting light in a wavelength range of about 900 nm to about 1100 nm.