Display Apparatus

Patent metadata

Field	Value
Publication number	US-2021063813-A1
Application number	US-202016921960-A
Country	US
Kind code	A1
Filing date	Jul 7, 2020
Priority date	Aug 29, 2019
Publication date	Mar 4, 2021
Grant date	—

Abstract

A display apparatus includes a first polarizer, a first liquid crystal panel, a second polarizer, a second liquid crystal panel and a third polarizer which are sequentially stacked, wherein the second polarizer includes two protective layers, and a polarizing layer positioned between the two protective layers.

First claim

What is claimed is:

1 . A display apparatus, comprising a first polarizer, a first liquid crystal panel, a second polarizer, a second liquid crystal panel and a third polarizer which are sequentially stacked, wherein the second polarizer comprises two protective layers, and a polarizing layer positioned between the two protective layers.

2 . The display apparatus according to claim 1 , wherein an in-plane optical path difference compensation value Ro of the protective layer close to the first liquid crystal panel among the two protective layers of the second polarizer is less than 100 nm, and an optical path difference compensation value Rth in a thickness direction is less than 1000 nm.

3 . The display apparatus according to claim 2 , wherein the in-plane optical path difference compensation value Ro of the protective layer close to the first liquid crystal panel among the two protective layers of the second polarizer is less than 50 nm, and the optical path difference compensation value Rth in the thickness direction is less than 500 nm.

4 . The display apparatus according to claim 3 , wherein the in-plane optical path difference compensation value Ro of the protective layer close to the first liquid crystal panel among the two protective layers of the second polarizer is less than 10 nm, and the optical path difference compensation value Rth in the thickness direction is less than 100 nm.

5 . The display apparatus according to claim 4 , wherein the in-plane optical path difference compensation values Ro of the two protective layers of the second polarizer are both less than 10 nm, and the optical path difference compensation values Rth of the two protective layers in the thickness direction are both less than 100 nm.

6 . The display apparatus according to claim 5 , wherein the first polarizer and the third polarizer both have a same structure as the second polarizer;
wherein, the in-plane optical path difference compensation value Ro of the protective layer close to the first liquid crystal panel among the two protective layers of the first polarizer is less than 10 nm, and the optical path difference compensation value Rth in the thickness direction is less than 100 nm; and/or, the in-plane optical path difference compensation value Ro of the protective layer close to the second liquid crystal panel among the two protective layers of the third polarizer is less than 10 nm, and the optical path difference compensation value Rth in the thickness direction is less than 100 nm.

7 . The display apparatus according to claim 6 , wherein,
a material of the protective layer away from the first liquid crystal panel among the two protective layers of the first polarizer is polyethylene terephthalate; a material of the protective layer away from the second liquid crystal panel among the two protective layers of the third polarizer is polyethylene terephthalate.

8 . The display apparatus according to claim 1 , wherein the first liquid crystal panel is a light control panel, and the second liquid crystal panel is a display panel;
wherein, the display panel comprises a plurality of grid lines extending along a first direction and a second direction crossing each other, and the grid lines define a plurality of sub-pixel units; the light control panel comprises a plurality of signal lines extending along the first direction and the second direction crossing each other, and the signal lines define a plurality of light control units; at least part of the signal lines has a polyline route.

9 . The display apparatus according to claim 8 , wherein,
the signal lines comprise a plurality of first signal lines extending along the first direction and a plurality of second signal lines extending along the second direction; the first signal line has a polyline route and comprises a plurality of first polyline units arranged periodically and continuously, one of the first polyline units corresponds to one of the light control units, and one of the first polyline units comprises a first part and a second part, and a first end of the first part is connected with a first end of the second part; the grid lines comprise a plurality of first grid lines extending along the first direction and a plurality of second grid lines extending along the second direction; an orthographic projection of an intersection of the first signal line and the second signal line on the display panel overlaps with the second grid line; an orthographic projection of a connection point of the first end of the first part and the first end of the second part of one of the first polyline units on the display panel overlaps with one of the second grid lines.

10 . The display apparatus according to claim 9 , wherein the second signal line has a polyline route and comprises a plurality of second polyline units arranged periodically and continuously, wherein one of the second polyline units corresponds to one of the light control units or one of the second polyline units corresponds to two of the light control units; one of the second polyline units comprises a first part and a second part, and a first end of the first part of the second polyline unit is connected with a first end of the second part of the second polyline unit.

11 . The display apparatus according to claim 1 , wherein a transmission axis of the second polarizer is perpendicular to that of the first polarizer, and a transmission axis of the third polarizer is perpendicular to that of the second polarizer.

12 . The display apparatus according to claim 1 , wherein a refractive index of the protective layer close to the first liquid crystal panel among the two protective layers of the second polarizer is 1.45˜1.60.

13 . The display apparatus according to claim 1 , wherein a thickness of the protective layer close to the first liquid crystal panel among the two protective layers of the second polarizer is 30 um˜80 um.

14 . The display apparatus according to claim 1 , further comprising a fourth polarizer, wherein the fourth polarizer is positioned between the second polarizer and the first liquid crystal panel, or the fourth polarizer is positioned between the second polarizer and the second liquid crystal panel, and the fourth polarizer has a same structure as the second polarizer.

15 . The display apparatus according to claim 14 , wherein,
an in-plane optical path difference compensation value Ro of the protective layer close to the first liquid crystal panel among the two protective layers of the second polarizer is less than 100 nm, and an optical path difference compensation value Rth in a thickness direction is less than 1000 nm; an in-plane optical path difference compensation value Ro of the protective layer close to the first liquid crystal panel among the two protective layers of the fourth polarizer is less than 100 nm, and an optical path difference compensation value Rth in a thickness direction is less than 1000 nm.

16 . The display apparatus according to claim 15 , wherein,
the in-plane optical path difference compensation value Ro of the protective layer close to the first liquid crystal panel among the two protective layers of the second polarizer is less than 50 nm, and the optical path difference compensation value Rth in the thickness direction is less than 500 nm; the in-plane optical path difference compensation value Ro of the protective layer close to the first liquid crystal panel among the two protective layers of the fourth polarizer is less than 50 nm, and the optical path difference compensation value Rth in the thickness direction is l

Assignees

• Hefei Xinsheng Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Liu Jiaqing
• Liao Yanping
• Dai Ke
• Guo Lei

Classifications

• G02F1/13471

  in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells (G02F1/13475 takes precedence) · CPC title

• G02F1/133528 Primary

  Polarisers · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G02F1/13363

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

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title