LIQUID CRYSTAL DISPLAY PANEL AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME

• US 20190324319A1
• Filed: 04/05/2019
• Published: 10/24/2019
• Est. Priority Date: 04/23/2018
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Group)
• Original Assignee: Samsung Display Company Limited (Samsung Group)
• Inventors: PARK, Keunwoo, KIM, Jangsoo, LIM, Taewoo, MAENG, Cheonjae, LEE, Seongyeon, LEE, Hongbeom
• Application Number:
  US16/377,068
• Publication Number:
  US 20190324319A1
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133548 Wire-grid polarisers
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G02F 1/136277 formed on a semiconductor substrate, e.g. of silicon

Abstract

A liquid crystal display panel and a liquid crystal display device may include a first substrate and a second substrate, which face each other, and a liquid crystal layer disposed therebetween. The first substrate may include a first base substrate, a color conversion layer disposed on the first base substrate and including a quantum dot, and a first polarizing layer disposed on the color conversion layer. The liquid crystal display device may exhibit a high color reproduction property and improved reliability.

Claims

1. A liquid crystal display panel comprising:

a first substrate;

a second substrate facing the first substrate; and

a liquid crystal layer between the first substrate and the second substrate,

wherein the first substrate comprises;

a first base substrate;

a color conversion layer on the first base substrate and comprising a quantum dot; and

a first polarizing layer on the color conversion layer.

2. The liquid crystal display panel of claim 1, wherein the second substrate comprises:

a second base substrate;

a second polarizing layer on the liquid crystal layer;

a circuit layer on a surface of the second base substrate, the surface facing the liquid crystal layer; and

a color filter layer between the liquid crystal layer and the circuit layer.

3. The liquid crystal display panel of claim 1, wherein the color conversion layer is directly on the first base substrate.

4. The liquid crystal display panel of claim 1, further comprising a barrier layer on the color conversion layer.

5. The liquid crystal display panel of claim 1, wherein the first polarizing layer is a wire grid polarizer.

6. The liquid crystal display panel of claim 5, further comprising a capping layer on the first polarizing layer.

7. The liquid crystal display panel of claim 2, wherein the second polarizing layer is a low reflection polarizer.

8. The liquid crystal display panel of claim 2, wherein the circuit layer comprises a thin film transistor, the thin film transistor comprising a gate electrode, a first electrode, a second electrode, and a semiconductor pattern, and

the liquid crystal display panel further comprises a column spacer overlapping the thin film transistor and protruding from the second substrate toward the liquid crystal layer.

9. The liquid crystal display panel of claim 8, wherein the column spacer comprises a polymer resin and/or a pigment or a dye dispersed in the polymer resin.

10. A liquid crystal display device comprising:

a light source member; and

a liquid crystal display panel on the light source member,

wherein the liquid crystal display panel comprises;

a first substrate;

a second substrate facing the first substrate; and

a liquid crystal layer between the first substrate and the second substrate,

wherein the first substrate comprises;

a first base substrate;

a color conversion layer on the first base substrate and comprising a quantum dot; and

a first polarizing layer on the color conversion layer.

11. The liquid crystal display device of claim 10, wherein the light source member comprises:

a light source comprising a circuit board and a light emitting element on the circuit board; and

a guide panel configured to guide light from the light source to the liquid crystal display panel.

12. The liquid crystal display device of claim 11, wherein the guide panel comprises a plurality of emission patterns on a bottom surface thereof.

13. The liquid crystal display device of claim 12, wherein each of the plurality of emission patterns has a lens shape protruding from the bottom surface of the guide panel.

14. The liquid crystal display device of claim 11, wherein the light emitting element is to emit blue light, and

the quantum dot comprises a first quantum dot to be excited by the blue light to emit green light and a second quantum dot to be excited by the blue light to emit red light.

15. The liquid crystal display device of claim 10, wherein the second substrate comprises:

a second base substrate;

a second polarizing layer on the liquid crystal layer;

a circuit layer on a surface of the second base substrate, the surface facing the liquid crystal layer; and

a color filter layer between the liquid crystal layer and the circuit layer.

16. The liquid crystal display device of claim 11, wherein the light source is on at least one side surface of the guide panel.

17. The liquid crystal display device of claim 11, further comprising an air gap between the liquid crystal display panel and the guide panel.

18. A liquid crystal display device comprising:

a light source member; and

a liquid crystal display panel on the light source member,

wherein the liquid crystal display panel comprises;

a first substrate;

a second substrate facing the first substrate; and

a liquid crystal layer between the first substrate and the second substrate,

wherein the light source member comprises;

a light source configured to emit blue light; and

a guide panel having one side surface facing an emission surface of the light source,

the first substrate comprises;

a first base substrate;

a color conversion layer directly on the first base substrate and comprising a first quantum dot to be excited by the blue light to emit green light and a second quantum dot to be excited by the blue light to emit red light; and

a first polarizing layer on the color conversion layer, and

the second substrate comprises;

a color filter layer on the liquid crystal layer;

a circuit layer on the color filter layer;

a second base substrate on the circuit layer; and

a second polarizing layer on the second base substrate.

19. The liquid crystal display device of claim 18, wherein the liquid crystal display panel is on the light source member and is spaced apart therefrom.

20. The liquid crystal display device of claim 18, wherein the guide panel comprises a plurality of emission patterns protruding from a bottom surface thereof.