Image display apparatus

Patent metadata

Field	Value
Publication number	US-2021003873-A1
Application number	US-201916645774-A
Country	US
Kind code	A1
Filing date	Jun 11, 2019
Priority date	Jul 5, 2018
Publication date	Jan 7, 2021
Grant date	—

Abstract

An image display apparatus includes a sub display panel and a main display panel. The sub display panel includes a liquid crystal cell and a polarizing plate arranged along at least one of main surfaces of the liquid crystal cell. The main display panel includes a liquid crystal cell and a polarizing plate arranged along at least one of main surfaces of the liquid crystal cell. The main display panel overlaps the sub display panel in a direction perpendicular to a main surface of the sub display panel. When the sub display panel is heated, the sub display panel is warped towards the main display panel.

First claim

1 . An image display apparatus, comprising:
a first display panel including a first liquid crystal cell and at least one first polarizing plate, the at least one first polarizing plate being arranged along at least one of main surfaces of the first liquid crystal cell; and a second display panel including a second liquid crystal cell and at least one second polarizing plate, the at least one second polarizing plate being arranged along at least one of main surfaces of the second liquid crystal cell, the second display panel overlapping the first display panel in a direction perpendicular to a main surface of the first display panel, wherein when the first display panel is heated, the first display panel is warped towards the second display panel.

2 . The image display apparatus according to claim 1 , wherein when the second display panel is heated, the second display panel is warped away from the first display panel.

3 . The image display apparatus according to claim 1 , wherein
the first display panel includes a light transmissive sheet on a side opposite to a side facing the second display panel, the light transmissive sheet comprising a material having a smaller thermal expansion coefficient than a thermal expansion coefficient of the at least one first polarizing plate.

4 . The image display apparatus according to claim 1 , wherein
the first display panel includes a light transmissive sheet on a side facing the second display panel, the light transmissive sheet comprising a material having a greater thermal expansion coefficient than a thermal expansion coefficient of the at least one first polarizing plate.

5 . The image display apparatus according to claim 1 , wherein
the at least one first polarizing plate is a pair of first polarizing plates respectively arranged along both of the main surfaces of the first liquid crystal cell, and in the first display panel, among the pair, a first polarizing plate on a side opposite to a side facing the second display panel is thinner than another first polarizing plate on the side facing the second display panel.

6 . The image display apparatus according to claim 1 , wherein
the at least one first polarizing plate is a pair of first polarizing plates respectively arranged along both of the main surfaces of the first liquid crystal cell, and in the first display panel, among the pair, a first polarizing plate on a side opposite to a side facing the second display panel comprises a material having a smaller thermal expansion coefficient than a thermal expansion coefficient of a material comprised in another first polarizing plate on the side facing the second display panel.

7 . The image display apparatus according to claim 1 , further comprising:
a backlight unit, wherein the first display panel is located between the second display panel and the backlight unit.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kitazumi Tsubasa
• Takeuchi Taizou
• Araya Jun

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

  Polarisers · CPC title

• G09F9/46

  in which the desired character is selected from a number of characters arranged one behind the other · CPC title

• G09F9/35 Primary

  being liquid crystals (G09F9/302 takes precedence; liquid crystal materials C09K19/00; {liquid crystal panels comprising a number of electrodes in a single cell per se G02F1/13}) · CPC title

• G02F1/1347 Primary

  Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells · CPC title