IP Library › Granted Patent US 12687749
Granted Patent B2
US 12687749 · App. 17/597,920 · Granted Jul 21, 2026

Liquid crystal display device

Inventors: Yutong Han (Shenzhen, CN); Juncheng Xiao (Shenzhen, CN); Ji Li (Shenzhen, CN); Xiaojin He (Shenzhen, CN)
Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
G02F1/133614G02F1/133512G02F1/133528G02F2202/28
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12687749
App. No.
17/597,920
Granted
Jul 21, 2026
Kind
B2
Abstract

The present application provides a liquid crystal display device. The liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, an upper polarizer, a color conversion layer and a third substrate. The second substrate is arranged opposite to the first substrate. The liquid crystal layer is arranged between the first substrate and the second substrate. The upper polarizer is arranged on a side of the second substrate away from the first substrate. The color conversion layer is arranged on a side of the upper polarizer away from the second substrate. The third substrate is arranged on a side of the color conversion layer away from the upper polarizer.

Claims (51)

1 . A liquid crystal display device, wherein the liquid crystal display device comprises:

a first substrate;

a second substrate arranged opposite to the first substrate;

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

an upper polarizer arranged on a side of the second substrate away from the first substrate;

a color conversion layer arranged on a side of the upper polarizer away from the second substrate;

a third substrate arranged on a side of the color conversion layer away from the upper polarizer;

a protective layer located on a side of the color conversion layer close to the upper polarizer; and

an adhesive layer disposed between the upper polarizer and the protective layer;

wherein the adhesive layer is attached to an inner periphery at an interface between the upper polarizer and the protective layer, and an enclosed space is defined by the adhesive layer, the protective layer, and the upper polarizer.

2 . The liquid crystal display device according to claim 1 , wherein the liquid crystal display device comprises a plurality of pixel areas, each of the pixel areas comprises a first sub-pixel area, a second sub-pixel area, and a third sub-pixel area, the color conversion layer comprises a first color conversion part, a second color conversion part, and a light-transmitting part that are arranged at intervals, the first color conversion part and the second color conversion part are configured to convert light of different colors, the first color conversion part is located in the first sub-pixel area, the second color conversion part is located in the second sub-pixel area, and the light-transmitting part is located in the third sub-pixel area; and

the first sub-pixel area is a red sub-pixel area, the second sub-pixel area is a green sub-pixel area, the third sub-pixel area is a blue sub-pixel area, and light emitted by a backlight module of the liquid crystal display device is blue light; a material of the first color conversion part comprises a red fluorescent material and a red filter material, a material of the second color conversion part comprises a green fluorescent material and a green filter material, and the light-transmitting part comprises a blue filter material.

3 . The liquid crystal display device according to claim 2 , wherein the red fluorescent material is red fluorescent powder or red quantum dots, and the green fluorescent material is green fluorescent powder or green quantum dots.

4 . The liquid crystal display device according to claim 1 , wherein a material of the protective layer comprises one or more of silicon nitride, silicon oxide, and silicon oxynitride.

5 . The liquid crystal display device according to claim 1 , wherein the liquid crystal display device further comprises a light-shielding part provided on a side of the third substrate close to the upper polarizer, and the light-shielding part is located between the first color conversion part and the second color conversion part, between the first color conversion part and the light-transmitting part, and between the second color conversion part and the light-transmitting part.

6 . The liquid crystal display device according to claim 1 , wherein the red filter material and the green filter material each comprise resin, inorganic pigment particles, and an organic dye.

7 . The liquid crystal display device according to claim 1 , wherein the light-transmitting part comprises a blue filter material, wherein the blue filter material comprises resin, inorganic pigment particles, and an organic dye.

8 . The liquid crystal display device according to claim 1 , wherein the liquid crystal display device comprises a plurality of pixel areas, each of the pixel areas comprises a first sub-pixel area, a second sub-pixel area, and a third sub-pixel area, the color conversion layer comprises a first color conversion part, a second color conversion part, and a light-transmitting part that are arranged at intervals, the first color conversion part and the second color conversion part are configured to convert light of different colors, the first color conversion part is located in the first sub-pixel area, the second color conversion part is located in the second sub-pixel area, and the light-transmitting part is located in the third sub-pixel area.

9 . The liquid crystal display device according to claim 8 , wherein the first sub-pixel area is a red sub-pixel area, the second sub-pixel area is a green sub-pixel area, the third sub-pixel area is a blue sub-pixel area, light emitted by a backlight module of the liquid crystal display device is blue light, a material of the first color conversion part comprises a red fluorescent material, a material of the second color conversion part comprises a green fluorescent material, and the liquid crystal display device further comprises a blue light absorbing layer located on a side of the first color conversion part and the second color conversion part disposed away from the upper polarizer.

10 . The liquid crystal display device according to claim 9 , wherein the blue light absorbing layer comprises a red filter part and a green filter part, the red filter part is located on a side of the first color conversion part away from the upper polarizer, and the green filter part is located on a side of the second color conversion part away from the upper polarizer.

11 . The liquid crystal display device according to claim 9 , wherein a material of the light-transmitting part comprises a blue filter material, the liquid crystal display device further comprises a blue filter part, and the blue filter part and the blue light absorbing layer are arranged in a same layer and are located on a side of the light-transmitting part away from the upper polarizer.

12 . A liquid crystal display device, wherein the liquid crystal display device comprises:

a first substrate;

a second substrate arranged opposite to the first substrate;

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

an upper polarizer arranged on a side of the second substrate away from the first substrate;

a color conversion layer arranged on a side of the upper polarizer away from the second substrate;

a third substrate arranged on a side of the color conversion layer away from the upper polarizer;

a light-shielding part arranged on a side of the third substrate close to the upper polarizer;

a protective layer located on a side of the color conversion layer close to the upper polarizer; and

an adhesive layer disposed between the upper polarizer and the protective layer;

wherein the liquid crystal display device comprises a plurality of pixel areas, each of the pixel areas comprises a first sub-pixel area, a second sub-pixel area, and a third sub-pixel area, the color conversion layer comprises a first color conversion part, a second color conversion part, and a light-transmitting part that are arranged at intervals, the first color conversion part and the second color conversion part are configured to convert light of different colors, the first color conversion part is located in the first sub-pixel area, the second color conversion part is located in the second sub-pixel area, the light-transmitting part is located in the third sub-pixel area, and the light-shielding part is located between the first color conversion part and the second color conversion part, between the first color conversion part and the light-transmitting part, and between the second color conversion part and the light-transmitting part; and

wherein the adhesive layer is attached to an inner periphery at an interface between the upper polarizer and the protective layer, and an enclosed space is defined by the adhesive layer, the protective layer, and the upper polarizer.

13 . The liquid crystal display device according to claim 12 , wherein the first sub-pixel area is a red sub-pixel area, the second sub-pixel area is a green sub-pixel area, the third sub-pixel area is a blue sub-pixel area, and light emitted by a backlight module of the liquid crystal display device is blue light; a material of the first color conversion part comprises a red fluorescent material and a red filter material, a material of the second color conversion part comprises a green fluorescent material and a green filter material, and the light-transmitting part comprises a blue filter material.

14 . The liquid crystal display device according to claim 13 , wherein the red fluorescent material is red fluorescent powder or red quantum dots, and the green fluorescent material is green fluorescent powder or green quantum dots.

15 . The liquid crystal display device according to claim 12 , wherein a material of the protective layer comprises one or more of silicon nitride, silicon oxide, and silicon oxynitride.

16 . The liquid crystal display device according to claim 12 , wherein the red filter material and the green filter material each comprise resin, inorganic pigment particles, and an organic dye.

17 . The liquid crystal display device according to claim 12 , wherein the light-transmitting part comprises a blue filter material, wherein the blue filter material comprises resin, inorganic pigment particles, and an organic dye.

18 . A liquid crystal display device, comprising:

a first substrate;

a second substrate arranged opposite to the first substrate;

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

an upper polarizer arranged on a side of the second substrate away from the first substrate;

a color conversion layer arranged on a side of the upper polarizer away from the second substrate;

a third substrate arranged on a side of the color conversion layer away from the upper polarizer;

a protective layer located on a side of the color conversion layer close to the upper polarizer; and

an adhesive layer arranged around both an outer peripheral surface of the upper polarizer and an outer peripheral surface of the protective layer;

wherein the protective layer is in contact with the upper polarizer, and the adhesive layer is attached to an outer periphery of a junction between the upper polarizer and the protective layer.

19 . The liquid crystal display device according to claim 18 , wherein the liquid crystal display device comprises a plurality of pixel areas, each of the pixel areas comprises a first sub-pixel area, a second sub-pixel area, and a third sub-pixel area, the color conversion layer comprises a first color conversion part, a second color conversion part, and a light-transmitting part that are arranged at intervals, the first color conversion part and the second color conversion part are configured to convert light of different colors, the first color conversion part is located in the first sub-pixel area, the second color conversion part is located in the second sub-pixel area, and the light-transmitting part is located in the third sub-pixel area; and

the first sub-pixel area is a red sub-pixel area, the second sub-pixel area is a green sub-pixel area, the third sub-pixel area is a blue sub-pixel area, and light emitted by a backlight module of the liquid crystal display device is blue light; a material of the first color conversion part comprises a red fluorescent material and a red filter material, a material of the second color conversion part comprises a green fluorescent material and a green filter material, and the light-transmitting part comprises a blue filter material.

20 . The liquid crystal display device according to claim 19 , wherein the red fluorescent material is red fluorescent powder or red quantum dots, and the green fluorescent material is green fluorescent powder or green quantum dots.