IP Library Granted Patent US 11,275,284
Granted Patent B2
US 11,275,284 · App. 17/231,179 · Granted Mar 15, 2022

Display device

Inventors: Yudai Numata (Tokyo, JP); Kentaro Okuyama (Tokyo, JP); Kojiro Ikeda (Tokyo, JP)
Assignee: Japan Display Inc.
G02F1/136286G02F1/1368G02F1/136209
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Quick Facts
Patent No.
US 11,275,284
App. No.
17/231,179
Granted
Mar 15, 2022
Kind
B2
Abstract

According to one embodiment, a display device includes a first substrate including a first transparent substrate, a wiring portion, and a pixel electrode, a second substrate including a second transparent substrate, a common electrode opposed to the pixel electrode, a light-shielding layer overlapping the wiring portion between the second transparent substrate and the common electrode, and a transparent layer disposed between the second transparent substrate and the light-shielding layer, a liquid crystal layer including a stripe-shaped polymer and liquid crystal molecules, and light-emitting elements. A refractive index of the transparent layer is less than a refractive index of the second transparent substrate.

Claims (43)

1. A display device comprising:

a first substrate comprising a first transparent substrate, a wiring portion, and a pixel electrode electrically connected to the wiring portion;

a second substrate comprising a second transparent substrate, a common electrode opposed to the pixel electrode, a light-shielding layer overlapping the wiring portion between the second transparent substrate and the common electrode, and a transparent layer disposed between the second transparent substrate and the light-shielding layer;

a liquid crystal layer disposed between the first substrate and the second substrate and including a stripe-shaped polymer and liquid crystal molecules; and

a plurality of light-emitting elements, wherein

a refractive index of the transparent layer is less than a refractive index of the second transparent substrate,

the transparent layer is an insulating layer comprising an aperture opposed to the pixel electrode,

the wiring portion comprises a scanning line, a signal line crossing the scanning line, and a switching element electrically connected to the scanning line and the signal line,

the transparent layer overlaps the scanning line, the signal line, and the switching element in planar view, and

an area of the transparent layer in a first pixel is less than an area of the transparent layer in a second pixel located between the light-emitting elements and the first pixel.

2. The display device of claim 1 , wherein

the second transparent substrate comprises a main surface opposed to the liquid crystal layer and a side surface opposed to the light-emitting elements,

the transparent layer is in contact with the main surface, and

the light-shielding layer is in contact with the transparent layer.

3. The display device of claim 2 , wherein the light-shielding layer is apart from the main surface.

4. The display device of claim 2 , wherein the light-shielding layer is in contact with the main surface in the aperture.

5. The display device of claim 2 , wherein

the second substrate further comprises a transparent organic insulating film, and

the organic insulating film directly covers the transparent layer and the light-shielding layer, and is in contact with the main surface in the aperture.

6. The display device of claim 2 , wherein the common electrode directly covers the transparent layer and the light-shielding layer, and is in contact with the main surface in the aperture.

7. The display device of claim 6 , wherein

the second substrate further comprises a transparent organic insulating film, and

the organic insulating film directly covers the common electrode.

8. The display device of claim 1 , wherein the light-shielding layer is offset to a side away from the light-emitting elements in a region overlapping the transparent layer.

9. The display device of claim 1 , wherein the light-shielding layer is offset to a side closer to the light-emitting elements in a region overlapping the transparent layer.

10. The display device of claim 1 , wherein the aperture extends along the scanning line.

11. The display device of claim 1 , wherein the aperture extends along the signal line.

12. A display device comprising:

a first transparent substrate;

a second transparent substrate comprising a main surface and a side surface;

a liquid crystal layer disposed between the first transparent substrate and the second transparent substrate, and including a stripe-shaped polymer and liquid crystal molecules;

a light-shielding layer disposed between the second transparent substrate and the liquid crystal layer;

a transparent layer disposed between the second transparent substrate and the light-shielding layer, and being in contact with the main surface; and

a light-emitting element opposed to the side surface, wherein

the transparent layer is an insulating layer comprising an aperture, and

an area of the transparent layer in a first pixel is less than an area of the transparent layer in a second pixel located between the light-emitting elements and the first pixel.

13. The display device of claim 12 , wherein the light-shielding layer is in contact with the transparent layer, and is apart from the main surface.

14. The display device of claim 12 , wherein the light-shielding layer is in contact with the transparent layer, and is in contact with the main surface in the aperture.

15. The display device of claim 12 , further comprising a transparent organic insulating film, wherein

the organic insulating film directly covers the transparent layer and the light-shielding layer, and is in contact with the main surface in the aperture.

16. The display device of claim 12 , further comprising a transparent electrode directly covering the transparent layer and the light-shielding layer, and

the transparent electrode is in contact with the main surface in the aperture.

17. The display device of claim 12 , wherein the transparent layer is formed in a lattice shape in planar view.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 15, 2021
From: NUMATA, YUDAI; OKUYAMA, KENTARO; IKEDA, KOJIRO
To: JAPAN DISPLAY INC.
Reel/Frame 055928/0052 →
Priority Claims (1)
JP JP2018-197676 · Oct 19, 2018 · national
Continuity (2)
Continuation PCTJP2019038661 · Sep 30, 2019
Related Publication 20210232010A1 · Jul 29, 2021
Cited By (1)
US 12,216,354