Video display device

Patent metadata

Field	Value
Publication number	US-2024427200-A1
Application number	US-202418668387-A
Country	US
Kind code	A1
Filing date	May 20, 2024
Priority date	Jun 21, 2023
Publication date	Dec 26, 2024
Grant date	—

Abstract

Provided are a liquid crystal panel capable of controlling the viewing angle with less or no increase in thickness and a video display device including the liquid crystal panel. The video display device includes: a liquid crystal panel; and a display panel configured to display an image. The liquid crystal panel includes a first transparent substrate, a first electrode, a liquid crystal layer, a second electrode, an interlayer insulating film, a third electrode, and a second transparent substrate in the stated order. The liquid crystal layer includes an overlapping region overlapping the second electrode and a non-overlapping region not overlapping the second electrode, and thus includes a transparent region in a high transmission state and a switching region switchable between a high transmission state and a low transmission state. The liquid crystal layer is sandwiched between a pair of polarizing plates.

First claim

What is claimed is:

1 . A video display device comprising:
a liquid crystal panel; and a display panel configured to display an image, the liquid crystal panel including a first transparent substrate, a first electrode, a liquid crystal layer, a second electrode, an interlayer insulating film, a third electrode, and a second transparent substrate in the stated order, the liquid crystal layer including an overlapping region overlapping the second electrode and a non-overlapping region not overlapping the second electrode, and thus including a transparent region in a high transmission state and a switching region switchable between a high transmission state and a low transmission state, the liquid crystal layer being sandwiched between a pair of polarizing plates.

2 . The video display device according to claim 1 ,
wherein the video display device is capable of applying different voltages to the transparent region and the switching region, respectively.

3 . The video display device according to claim 1 ,
wherein a thickness of the non-overlapping region is 30 μm or smaller.

4 . The video display device according to claim 1 ,
wherein the second electrode is a transparent electrode or an electrode containing a light-absorbing material.

5 . The video display device according to claim 1 , further comprising a backlight.

6 . The video display device according to claim 5 ,
wherein the backlight has a local dimming function.

7 . The video display device according to claim 1 ,
wherein the display panel is a liquid crystal display panel or a self-luminous display panel.

8 . The video display device according to claim 2 ,
wherein a thickness of the non-overlapping region is 30 μm or smaller.

9 . The video display device according to claim 2 ,
wherein the second electrode is a transparent electrode or an electrode containing a light-absorbing material.

10 . The video display device according to claim 2 , further comprising a backlight.

11 . The video display device according to claim 10 ,
wherein the backlight has a local dimming function.

12 . The video display device according to claim 8 ,
wherein the second electrode is a transparent electrode or an electrode containing a light-absorbing material.

13 . The video display device according to claim 8 , further comprising a backlight.

14 . The video display device according to claim 13 ,
wherein the backlight has a local dimming function.

15 . The video display device according to claim 12 , further comprising a backlight.

16 . The video display device according to claim 15 ,
wherein the backlight has a local dimming function.

Assignees

• Sharp Display Technology Corp

Inventors

• Yoshida Takehisa
• Shimoshikiryoh Fumikazu
• Yamada Shigeyuki

Classifications

• G02F1/1333

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

• G02F1/1323 Primary

  Arrangements for providing a switchable viewing angle · CPC title

• G02F1/13439 Primary

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F1/133601

  for spatial active dimming · CPC title

• G02F1/134372 Primary

  for fringe field switching [FFS] where the common electrode is not patterned · CPC title