COLOR FILTER SUBSTRATE AND LIQUID CRYSTAL DISPLAY DEVICE

• US 20200133053A1
• Filed: 11/19/2018
• Published: 04/30/2020
• Est. Priority Date: 10/25/2018
• Status: Abandoned Application

• Current Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: YANG, Chaoqun, Huang, Changchih
• Application Number:
  US16/335,253
• Publication Number:
  US 20200133053A1
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133311 Environmental protection, e.g. against dust or humidity
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/133565 inside the LC elements, i.e. between the cell substrates
• CPC Class Codes: G02F 1/133567 on the back side
• 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 2201/50 Protective arrangements
• CPC Class Codes: G02F 2201/501 Blocking layers, e.g. against migration of ions
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials

Abstract

Provided are a color filter substrate and a liquid crystal display device. The color filter substrate includes a base substrate, a plurality of quantum dot filter units arranged in an array on the base substrate and retaining walls disposed among the quantum dot filter units on the base substrate; the retaining wall includes a black matrix layer disposed on the base substrate and a reflective layer disposed on the black matrix layer, and the retaining wall has a thickness greater than a thickness of the quantum dot filter unit. The reflective layer can re-reflect light irradiated on a surface thereof to the quantum dot filter units for secondary utilization, thereby improving utilization of the light while avoiding color mixture through the other quantum dot filter units.

Claims

1. A color filter substrate, including a base substrate, a plurality of quantum dot filter units arranged in an array on the base substrate and retaining walls disposed among the quantum dot filter units on the base substrate;

wherein the retaining wall includes a black matrix layer disposed on the base substrate and a reflective layer disposed on the black matrix layer, and the retaining wall has a thickness greater than a thickness of the quantum dot filter unit.

2. The color filter substrate according to claim 1, wherein a reflectivity of the reflective layer is greater than 70%;

the reflective layer has a thickness of 3 μ

m to 6 μ

m, and an optical density value of the reflective layer per one micrometer thickness is greater than 1.

3. The color filter substrate according to claim 1, further including a protective layer on the quantum dot filter units and on the retaining walls, and a water-oxygen barrier layer between the quantum dot filter units and the protective layer.

4. The color filter substrate according to claim 1, wherein the plurality of quantum dot filter units include red quantum dot filter units, green quantum dot filter units and blue quantum dot filter units that are alternately arranged in sequence.

5. The color filter substrate according to claim 1, wherein a blue filter layer is further disposed between the red quantum dot filter unit and the base substrate and between the green quantum dot filter unit and the base substrate.

6. A liquid crystal display device, including a backlight module and a liquid crystal display panel disposed above the backlight module;

wherein the liquid crystal display panel includes;

a color filter substrate, a counter substrate disposed opposite to the color filter substrate and a liquid crystal layer between the color filter substrate and the counter substrate;

the backlight module is located on a side of the counter substrate away from the color filter substrate;

wherein the color filter substrate includes a first base substrate, a plurality of quantum dot filter units arranged in an array on the first base substrate and retaining walls disposed among the quantum dot filter units on the first base substrate;

wherein the retaining wall includes a black matrix layer disposed on the first base substrate and a reflective layer disposed on the black matrix layer, and the retaining wall has a thickness greater than a thickness of the quantum dot filter unit.

7. The liquid crystal display device according to claim 6, wherein a reflectivity of the reflective layer is greater than 70%;

the reflective layer has a thickness of 3 μ

m to 6 μ

m, and an optical density value of the reflective layer per one micrometer thickness is greater than 1.

8. The liquid crystal display device according to claim 6, wherein the color filter substrate further includes a protective layer on the quantum dot filter units and on the retaining walls, and a water-oxygen barrier layer between the quantum dot filter units and the protective layer.

9. The liquid crystal display device according to claim 6, wherein the plurality of quantum dot filter units include red quantum dot filter units, green quantum dot filter units and blue quantum dot filter units that are alternately arranged in sequence;

wherein a blue filter layer is further disposed between the red quantum dot filter unit and the base substrate and between the green quantum dot filter unit and the base substrate.

10. The liquid crystal display device according to claim 6, further including a first polarizing layer and a second polarizing layer;

wherein the first polarizing layer is located between the counter substrate and the backlight module, and the second polarizing layer is located between the color filter substrate and the liquid crystal layer.