Optical assembly, liquid crystal display panel, and display apparatus

Patent metadata

Field	Value
Publication number	US-11467450-B2
Application number	US-202017290484-A
Country	US
Kind code	B2
Filing date	Aug 26, 2020
Priority date	Sep 26, 2019
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

An optical assembly, a liquid crystal display panel, and a display apparatus, the optical assembly including: a quarter-wave plate, a half-wave plate, and a linear polariser stacked in sequence; the direction of the absorption axis of the linear polariser, the direction of the slow axis of the half-wave plate and the quarter-wave plate are all parallel to the linear polariser; a first included angle between the direction of the absorption axis of the linear polariser and a first direction is 90°-100°; a second included angle between the direction of the slow axis of the half-wave plate and the first direction is 107°-114°; a third included angle between the direction of the slow axis of the quarter-wave plate and the first direction is 164°-176°.

First claim

What is claimed is:

1. A liquid crystal display panel, comprising: an optical assembly and a liquid crystal cell;
wherein the optical assembly comprises: a quarter-wave plate, a half-wave plate, and a linear polarizer stacked successively, wherein an absorption axis direction of the linear polarizer, a slow axis direction of the half-wave plate, and a slow axis direction of the quarter-wave plate are all parallel to the linear polarizer;
a first included angle between the absorption axis direction of the linear polarizer and a first direction is 90° to 100° , and is obtained by rotating from the first direction to the absorption axis direction of the linear polarizer counterclockwise in a plane parallel to the linear polarizer; wherein the first direction a horizontal direction;
a second included angle between the slow axis direction of the half-wave plate and the first direction is 107° to 114° , and is obtained by rotating from the first direction to the slow axis direction of the half-wave plate counterclockwise in a plane parallel to the linear polarizer; and
a third included angle between the slow axis direction of the quarter-wave plate and the first direction is 164° to 176° , and is obtained by rotating from the first direction to the slow axis direction of the quarter-wave plate counterclockwise in a plane parallel to the linear polarizer;
wherein the liquid crystal cell is on a side of the quarter-wave plate away from the half-wave plate;
wherein the liquid crystal cell comprises: a liquid crystal layer containing nematic liquid crystal molecules, wherein an included angle between an initial orientation of the nematic liquid crystal molecules and the slow axis direction of the quarter-wave plate is 0° to 3°.

2. The liquid crystal display panel according to claim 1 , wherein a retardation of the liquid crystal layer under a wavelength of 550 nm is 143 nm to 190 nm.

3. The liquid crystal display panel according to claim 2 , wherein the retardation of the liquid crystal layer under the wavelength of 550 nm is 170 nm.

4. The liquid crystal display panel according to claim 1 , wherein the liquid crystal cell comprises:
an array substrate, and
a liquid crystal layer, wherein
the array substrate is located on a side of the liquid crystal layer away from the optical assembly; and
the array substrate comprises a base substrate and a plurality of reflective pixel electrodes on the base substrate, the plurality of reflective pixel electrodes being located between the base substrate and the liquid crystal layer.

5. The liquid crystal display panel according to claim 4 , wherein the array substrate further comprises:
a resin layer of a concave-convex structure located between the base substrate and the plurality of reflective pixel electrode, wherein
the plurality of reflective pixel electrodes structurally conform to the resin layer of the concave-convex structure.

6. The liquid crystal display panel according to claim 5 , wherein a slope of the concave-convex structure is 5° to 15°.

7. The liquid crystal display panel according to claim 5 , wherein the liquid crystal display panel is a reflective electronically-controlled birefringence liquid crystal display panel.

8. A display apparatus, comprising the liquid crystal display panel of claim 1 .

9. The liquid crystal display panel according to claim 1 , wherein the first included angle between the absorption axis direction of the linear polarizer and the first direction is 95°;
the second included angle between the slow axis direction of the half-wave plate and the first direction is 110°; and
the third included angle between the slow axis direction of the quarter-wave plate and the first direction is 170°.

10. The liquid crystal display panel according to claim 1 , wherein a retardation of the half-wave plate under a wavelength of 550 nm is 259 nm to 284 nm; and/or
a retardation of the quarter-wave plate under a wavelength of 550 nm is 100 nm to 110 nm.

11. The liquid crystal display panel according to claim 10 , wherein the retardation of the half-wave plate under the wavelength of 550 nm is 267 nm; and/or
the retardation of the quarter-wave plate under the wavelength of 550 nm is 110 nm.

Assignees

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

Inventors

• Zhong Xuan
• Yuan Hongliang
• Liu Jiantao
• Wang Jian
• Zhang Donghua

Classifications

• G02F1/133638 Primary

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

• G02F2413/06

  Two plates on one side of the LC cell · CPC title

• G02F2203/02

  reflective · CPC title

• G02F1/133553 Primary

  Reflecting elements (associated to illuminating devices G02F1/133605) · CPC title

• G02F1/133528

  Polarisers · CPC title