Display module, display apparatus and display method therefor

Patent metadata

Field	Value
Publication number	US-12216360-B2
Application number	US-202218292304-A
Country	US
Kind code	B2
Filing date	Jul 1, 2022
Priority date	Jul 30, 2021
Publication date	Feb 4, 2025
Grant date	Feb 4, 2025

Abstract

A display module, including: a first substrate ( 1 ); a second substrate ( 2 ); a liquid crystal layer ( 3 ); the display module further includes a first polarizing film ( 4 ), a first one-half wave plate ( 51 ) and a first quarter wave plate ( 52 ); the first quarter wave plate ( 52 ), the first one-half wave plate ( 51 ) and the first polarizing film ( 4 ) are on a side of the first substrate ( 1 ) away from the liquid crystal layer ( 3 ) and are sequentially stacked in a direction away from the first substrate ( 1 ); an angle between an absorption axis of the first polarizing film ( 4 ) and a first direction is in a range of 85° to 105°; an angle between a slow axis of the first one-half wave plate ( 51 ) and the first direction is in a range of 105° to 125°.

First claim

What is claimed is:

1. A display module, comprising: a first substrate; a second substrate; a liquid crystal layer in a cell gap between the first substrate and the second substrate; wherein
the display module further comprises a first polarizing film, a first one-half wave plate and a first quarter wave plate; the first quarter wave plate, the first one-half wave plate and the first polarizing film are on a side of the first substrate away from the liquid crystal layer and are sequentially stacked in a direction away from the first substrate;
the first substrate comprises a transmissive region and a reflective region, and a thickness of a part of the liquid crystal layer in the transmissive region is greater than a thickness of a part of the liquid crystal layer in the reflective region;
the transmissive region allows light incident from a side of the first substrate away from the second substrate to pass through the transmissive region; the reflective region allows light incident from a side of the second substrate away from the first substrate to be reflected;
an angle between an absorption axis of the first polarizing film and a first direction is in a range of 85° to 105°;
an angle between a slow axis of the first one-half wave plate and the first direction is in a range of 105° to 125°;
a retardation amount of light with wavelength of 550 nm by the first one-half wave plate is in a range of 260 nm to 280 nm;
an angle between a slow axis of the first quarter wave plate and the first direction is in a range of −20° to 20°;
a retardation amount of light with wavelength of 550 nm by the first quarter wave plate is in a range of 136 nm to 170 nm; and
the first direction is a direction perpendicular to an initial alignment direction of the liquid crystal layer.

2. The display module according to claim 1 , further comprising a second polarizing film, a second one-half wave plate and a second quarter wave plate; wherein the second quarter wave plate, the second one-half wave plate and the second polarizing film are on a side of the second substrate away from the liquid crystal layer and are sequentially stacked in a direction away from the second substrate;
an angle between an absorption axis of the second polarizing film and the first direction is in a range of 0° to 10°;
an angle between a slow axis of the second one-half wave plate and the first direction is in a range of 20° to 30°;
a retardation amount of light with wavelength of 550 nm by the second one-half wave plate is in a range of 260 nm to 280 nm;
an angle between a slow axis of the second quarter wave plate and the first direction is in a range of 80° to 100°; and
a retardation amount of light with wavelength of 550 nm by the second quarter wave plate is in a range of 80 nm to 115 nm.

3. The display module according to claim 2 , wherein the angle between the absorption axis of the first polarizing film and the first direction is in a range of 90° to 100°;
the angle between the slow axis of the first one-half wave plate and the first direction is in a range of 110° to 120°;
the angle between the slow axis of the first quarter wave plate and the first direction is in a range of −10° to 10°; and
the retardation amount of light with wavelength of 550 nm by the first quarter wave plate is in a range of 138 nm to 170 nm.

4. The display module according to claim 3 , wherein the angle between the slow axis of the second one-half wave plate and the first direction is in a range of 24° to 27°; and
the angle between the slow axis of the second quarter wave plate and the first direction is in a range of 88° to 94°.

5. The display module according to claim 4 , wherein a retardation amount of light by the part of the liquid crystal layer in the transmissive region is in a range of 228 nm to 402 nm; and
a retardation amount of light by the part of the liquid crystal layer in the reflective region is in a range of 101 nm to 214 nm.

6. The display module according to claim 5 , wherein the retardation amount of light by the part of the liquid crystal layer in the transmissive region is in a range of 241 nm to 402 nm; and
the retardation amount of light by the part of the liquid crystal layer in the reflective region is in a range of 121 nm to 201 nm.

7. The display module according to claim 6 , further comprising a first alignment film and a second alignment film;
wherein the first alignment film is on a side of the first substrate close to the liquid crystal layer;
the second alignment film is on a side of the second substrate close to the liquid crystal layer;
the first alignment film and the second alignment film are configured such that the liquid crystal layer is in the initial alignment direction without powering up;
alignment directions of the first alignment film and the second alignment film are parallel and opposite to each other; and
the first direction is perpendicular to the alignment directions of the first alignment film and the second alignment film.

8. The display module according to claim 2 , further comprising a scattering film between the second quarter wave plate and the second substrate.

9. The display module according to claim 2 , wherein the first polarizing film comprises a first protective layer, a first polarizer, and a second protective layer;
the first protective layer, the first polarizer, and the second protective layer are sequentially stacked together;
the second polarizing film comprises a third protective layer, a second polarizer, and a fourth protective layer;
the third protective layer, the second polarizer, and the fourth protective layer are sequentially stacked together;
the first polarizing film, the first one-half wave plate and the first quarter wave plate are adhered together by a light-transmitting adhesive; and
the second polarizing film, the second one-half wave plate and the second quarter wave plate are adhered together by a light-transmitting adhesive.

10. The display module according to claim 1 , wherein the first substrate comprises a plurality of sub-pixel regions arranged in an array; and
each of the plurality of sub-pixel regions is divided into the transmissive region and the reflective region.

11. The display module according to claim 10 , wherein the first substrate comprises a first base, a pixel circuit, a planarization layer, a reflective layer, and a pixel electrode;
the pixel circuit, the planarization layer, the reflective layer and the pixel electrode are sequentially stacked on a side of the first base close to the liquid crystal layer;
an orthographic projection of the planarization layer on the first base does not overlap with the transmissive region;
an orthographic projection of the reflective layer on the first base does not overlap with the transmissive region;
an orthographic projection of the pixel electrode on the first base covers an orthographic projection of the sub-pixel region on the first base; and
the pixel electrode is electrically connected to the pixel circuit.

12. The display module according to claim 10 , wherein the first substrate comprises a first base, a pixel circuit, a planarization layer, a reflective layer, and a pixel electrode;
the pixel circuit, the planarization layer and the reflective layer are sequentially stacked on a side of the first base close to the liquid crystal layer;
an orthographic projection of the planarization layer on the first base does not overlap with the transmissive region;
an orthographic projection of the reflective layer on the first base does not overlap with the transmissive region;
an orthographic projection of the pixel electrode on the first base doe

Assignees

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

Inventors

• Zhong Xuan
• Wang Jiaxing
• Yuan Hongliang
• Wu Xiaojuan
• Wang Jian
• Bi Hongsheng
• Zhao Zhiqiang
• Sun Ziqi
• Zhang Yongzhong
• Qu Feng

Classifications

• G02F2203/09

  transflective · CPC title

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G02F1/13363

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

• G02F1/133371

  Cells with varying thickness of the liquid crystal layer · CPC title

• G02F1/133638

  Waveplates, i.e. plates with a retardation value of lambda/n · CPC title