IP Library › Granted Patent US 10,718,966
Granted Patent B2
US 10,718,966 · App. 16/050,843 · Granted Jul 21, 2020

Liquid crystal display device

Inventors: Takao Imaoku (Hyogo, JP); Kazuhiko Tsuda (Hyogo, JP); Ikuko Imajo (Hyogo, JP); Yusuke Katagiri (Hyogo, JP)
Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.; PASONA KNOWLEDGE PARTNER INC.
G02F1/133308G02F1/1339G02F1/1347G02F1/1368G02F1/13452G02F1/133528B32B7/14G02B30/00G02F1/133512G02F2001/13332G02F2001/133314G02F2202/28G09G3/36G09G2300/023G09G2310/08H04N13/00
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Quick Facts
Patent No.
US 10,718,966
App. No.
16/050,843
Granted
Jul 21, 2020
Kind
B2
Abstract

A liquid crystal display device comprises: a first display panel including a first liquid crystal cell and a pair of first polarizing plates sandwiching the first liquid crystal cell; a second display panel including a second liquid crystal cell and a pair of second polarizing plates sandwiching the second liquid crystal cell; and a bonding member bonding one of the pair of first polarizing plates of the first display panel and one of the pair of second polarizing plates of the second display panel together. An end of the bonding member is located inside an end of the first polarizing plate and an end of the second polarizing plate.

Claims (45)

1. A liquid crystal display device comprising:

a first display panel including a first liquid crystal cell and a pair of first polarizing plates sandwiching the first liquid crystal cell;

a second display panel including a second liquid crystal cell and a pair of second polarizing plates sandwiching the second liquid crystal cell;

a bonding member located between the first display panel and the second display panel and bonding one of the pair of first polarizing plates of the first display panel and one of the pair of second polarizing plates of the second display panel together;

a first frame including a first bezel covering a peripheral portion of the first display panel; and

a second frame including a second bezel covering a peripheral portion of the second display panel,

wherein the first display panel, the bonding member, and the second display panel are between the first bezel and the second bezel, and

an end of the bonding member is located inside an end of the first polarizing plate and an end of the second polarizing plate, and the end of the bonding member is located outside an inside end of the first bezel and an inside end of the second bezel.

2. The liquid crystal display device according to claim 1 , wherein

the first liquid crystal cell includes a first peripheral light shielding layer formed in a region around a first image display region,

the second liquid crystal cell includes a second peripheral light shielding layer formed in a region around the second image display region, and

the end of the bonding member is located outside an inside end of the first peripheral light shielding layer and an inside end of the second peripheral light shielding layer.

3. The liquid crystal display device according to claim 1 , wherein

the first liquid crystal cell includes a pair of first substrates and a first sealing member sealing a first liquid crystal layer between the pair of first substrates,

the second liquid crystal cell includes a pair of second substrates and a second sealing member sealing a second liquid crystal layer between the pair of second substrates, and

the end of the bonding member is located inside an outside end of the first sealing member and an outside end of the second sealing member.

4. The liquid crystal display device according to claim 1 , wherein

the bonding member includes a first bonding layer bonded to the first polarizing plate and a second bonding layer bonded to the second polarizing plate, and

an end of the first bonding layer and an end of the second bonding layer are offset from each other at an end of the bonding member.

5. The liquid crystal display device according to claim 4 , wherein

the bonding member further includes a third bonding layer located between the first bonding layer and the second bonding layer, and

an end of the first bonding layer, an end of the third bonding layer, and an end of the second bonding layer are sequentially located inside or outside in this order.

6. The liquid crystal display device according to claim 1 , wherein

the bonding member includes a first bonding layer bonded to the first polarizing plate, a second bonding layer bonded to the second polarizing plate, and a third bonding layer located between the first bonding layer and the second bonding layer, and

the first bonding layer and the second bonding layer are harder than the third bonding layer.

7. The liquid crystal display device according to claim 1 , wherein

the bonding member includes a first bonding layer bonded to the first polarizing plate, a second bonding layer bonded to the second polarizing plate, and a third bonding layer located between the first bonding layer and the second bonding layer, and

the third bonding layer is harder than the first bonding layer and the second bonding layer.

8. The liquid crystal display device according to claim 1 , wherein

the bonding member includes a first bonding layer bonded to the first polarizing plate, a second bonding layer bonded to the second polarizing plate, and a third bonding layer located between the first bonding layer and the second bonding layer, and

the third bonding layer is thicker than the first bonding layer and the second bonding layer.

9. The liquid crystal display device according to claim 5 , wherein

a shift amount between the end of the first bonding layer and the end of the third bonding layer and a shift amount between the end of the third bonding layer and the end of the second bonding layer each range from 200 um to 400 um.

10. A liquid crystal display device comprising:

a first display panel including a first liquid crystal cell and a pair of first polarizing plates sandwiching the first liquid crystal cell;

a second display panel including a second liquid crystal cell and a pair of second polarizing plates sandwiching the second liquid crystal cell; and

a bonding member located between the first display panel and the second display panel, and bonding one of the pair of first polarizing plates of the first display panel and one of the pair of second polarizing plates of the second display panel together,

wherein the bonding member includes a first bonding layer bonded to the first polarizing plate, a second bonding layer bonded to the second polarizing plate, and a third bonding layer located between the first bonding layer and the second bonding layer, and

one of:

an end of the first bonding layer, an end of the third bonding layer, and an end of the second bonding layer are sequentially located outside in this order, and the other end of the first bonding layer, the other end of the third bonding layer, and the other end of the second bonding layer are sequentially located outside in this order, or

an end of the first bonding layer, an end of the third bonding layer, and an end of the second bonding layer are sequentially located inside in this order, and the other end of the first bonding layer, the other end of the third bonding layer, and the other end of the second bonding layer are sequentially located inside in this order.

11. The liquid crystal display device according to claim 10 , wherein the first bonding layer and the second bonding layer are harder than the third bonding layer.

12. The liquid crystal display device according to claim 10 , wherein the third bonding layer is harder than the first bonding layer and the second bonding layer.

13. The liquid crystal display device according to claim 10 , wherein the third bonding layer is thicker than the first bonding layer and the second bonding layer.

14. The liquid crystal display device according to claim 10 , wherein a shift amount between the end of the first bonding layer and the end of the third bonding layer and a shift amount between the end of the third bonding layer and the end of the second bonding layer each range from 200 um to 400 um.

Assignments (3)
NUNC PRO TUNC ASSIGNMENT Recorded Jul 12, 2023
From: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
To: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Reel/Frame 064258/0892 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 5, 2020
From: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
To: PASONA KNOWLEDGE PARTNER INC.
Reel/Frame 052849/0777 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 17, 2018
From: IMAOKU, TAKAO; TSUDA, KAZUHIKO; IMAJO, IKUKO; KATAGIRI, YUSUKE
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 047188/0289 →
Priority Claims (2)
JP 2017-149906 · Aug 2, 2017 · national
JP 2018-115757 · Jun 19, 2018 · national
Continuity (1)
Related Publication 20190041684A1 · Feb 7, 2019