Display panel and display apparatus

Patent metadata

Field	Value
Publication number	US-11947211-B2
Application number	US-202117908343-A
Country	US
Kind code	B2
Filing date	Aug 5, 2021
Priority date	Sep 30, 2020
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

A display panel includes: a liquid crystal cell; an optical layer configured to transmit part of light incident onto the optical layer whose polarization direction is parallel to a transmission axis of the optical layer, and reflect a remaining part of the light incident onto the optical layer; a first polarization structure configured to transmit part of light incident onto the first polarization structure whose polarization direction is parallel to a transmission axis of the first polarization structure, and absorb a remaining part of the light incident onto the first polarization structure; and a second polarization structure configured to transmit part of light incident onto the second polarization structure whose polarization direction is parallel to a transmission axis of the second polarization structure, and absorb a remaining part of the light incident onto the second polarization structure.

First claim

What is claimed is:

1. A display panel, comprising:
a liquid crystal cell including a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are disposed opposite to each other, and the liquid crystal layer is sandwiched between the first substrate and the second substrate;
an optical layer disposed on a side of the first substrate of the liquid crystal cell away from the second substrate, wherein the optical layer is configured to transmit part of light incident onto the optical layer whose polarization direction is parallel to a transmission axis of the optical layer, and reflect a remaining part of the light incident onto the optical layer;
a first polarization structure disposed on a side of the optical layer away from the liquid crystal cell, wherein the first polarization structure is configured to transmit part of light incident onto the first polarization structure whose polarization direction is parallel to a transmission axis of the first polarization structure, and absorb a remaining part of the light incident onto the first polarization structure;
a second polarization structure disposed on a side of the liquid crystal cell away from the optical layer, wherein the second polarization structure is configured to transmit part of light incident onto the second polarization structure whose polarization direction is parallel to a transmission axis of the second polarization structure, and absorb a remaining part of the light incident onto the second polarization structure; and the transmission axis of the first polarization structure is perpendicular to the transmission axis of the optical layer, and the transmission axis of the second polarization structure is perpendicular to or parallel to the transmission axis of the optical layer; and
a scattering film disposed on a side of the liquid crystal cell proximate to the optical layer and between the liquid crystal cell and the optical layer,

wherein the optical layer includes:
a plurality of first optical films, the plurality of first optical films being birefringent; and a plurality of second optical films, the plurality of second optical films being single-refractive, wherein in a direction perpendicular to a plane where the display panel is located, the plurality of first optical films and the plurality of second optical films are alternately stacked,
wherein one of a first optical film in the plurality of first optical films and a second optical film in the plurality of second optical films is directly bonded to the scattering film.

2. The display panel according to claim 1 , wherein the transmission axis of the second polarization structure is parallel to the transmission axis of the first polarization structure.

3. The display panel according to claim 1 , wherein in a first direction in a plane where the optical layer is located, a refractive index of the first optical film is greater than a refractive index of the second optical film; in a second direction in the plane where the optical layer is located, another refractive index of the first optical film is equal to the refractive index of the second optical film; and the first direction is perpendicular to the second direction.

4. The display panel according to claim 1 , wherein the transmission axis of the optical layer is in a range of 0° to 180°, inclusive; and the transmission axis of the optical layer is parallel to a plane where the display panel is located.

5. The display panel according to claim 1 , wherein a scattering axis of the scattering film is in a range of 0° to 90°, inclusive; an included angle between the scattering axis and a direction perpendicular to a plane where the display panel is located is in a range of 0° to 75°, inclusive.

6. The display panel according to claim 1 , further comprising an anti-reflection film disposed on a side of the second polarization structure away from the optical layer.

7. The display panel according to claim 1 , wherein the liquid crystal cell further includes:
a first alignment layer disposed on the first substrate and on a side of the first substrate proximate to the liquid crystal layer, the first alignment layer having a first alignment direction; and
a second alignment layer disposed on the second substrate and on a side of the second substrate proximate to the liquid crystal layer, the second alignment layer having a second alignment direction,
wherein the first alignment direction is parallel or perpendicular to the second alignment direction.

8. The display panel according to claim 7 , wherein the first alignment direction is parallel to the second alignment direction, and the second alignment direction is perpendicular to the transmission axis of the second polarization structure.

9. The display panel according to claim 8 , wherein the liquid crystal cell further includes first electrodes and at least one second electrode, wherein the first electrodes are disposed on the first substrate;
the at least one second electrode is disposed on the first substrate;
the first electrodes are farther away from the liquid crystal layer than the at least one second electrode; and the second electrode is a slit electrode, and the first electrodes are planar electrodes.

10. The display panel according to claim 7 , wherein the first alignment direction is perpendicular to the second alignment direction, and the second alignment direction is parallel to the transmission axis of the second polarization structure;
the liquid crystal cell further includes first electrodes and a second electrode;
the first electrodes are disposed on the first substrate;
the second electrode is disposed on the second substrate; and the first electrodes and the second electrode each are a planar electrode.

11. The display panel according to claim 1 , wherein the liquid crystal cell further includes a plurality of filter layers disposed on the second substrate and on a side of the second substrate proximate to the liquid crystal layer, wherein thicknesses of the plurality of filter layers are each in a range of 0.3 μm to 3 μm, inclusive.

12. The display panel according to claim 1 , wherein the liquid crystal cell further includes an electrostatic shielding pattern disposed on the second substrate and on a side of the second substrate proximate to the liquid crystal layer.

13. A display apparatus, comprising the display panel according to claim 1 .

14. The display apparatus according to claim 13 , further comprising a data processor coupled to the display panel, wherein the data processor is configured to invert input first image data to obtain second image data; and the display panel is configured to display an image according to the second image data.

15. A display panel, comprising:
a liquid crystal cell including a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are disposed opposite to each other, and the liquid crystal layer is sandwiched between the first substrate and the second substrate; an optical layer disposed on a side of the first substrate of the liquid crystal cell away from the second substrate, wherein the optical layer is configured to transmit part of light incident onto the optical layer whose polarization direction is parallel to a transmission axis of the optical layer, and reflect a remaining part of the light incident onto the optical layer;
a first polarization structure disposed on a side of the optical layer away from the liquid crystal cell, wherein the first polarization structure is configured to transmit

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Wang Jing
• Cai Yangyang
• Qu Guojian
• Tong guangyun
• Yang Fan
• Wang Chengwei
• Bu Zhanchang
• Wang Bochang
• Zhang Yu
• Wang Hetao
• Li Xiang

Classifications

• G02F1/133528 Primary

  Polarisers · CPC title

• G02F1/133504

  Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606) · CPC title

• G02F1/13363 Primary

  Birefringent elements, e.g. for optical compensation · CPC title

• G02F1/1337

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title

• G09G3/2092

  Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165) · CPC title