Light valve and display device

Patent metadata

Field	Value
Publication number	US-2017192223-A1
Application number	US-201514893880-A
Country	US
Kind code	A1
Filing date	Jul 7, 2015
Priority date	Jun 12, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

The present invention provides a light valve device, comprising a driving substrate having a shading zone and a photic zone, a shading unit, and the shading unit comprises a first shading plate, two driving units, and second shading plates respectively connected to the two driving units, and the driving unit and the first shading plate are fixed in the shading zone adjacent to the driving substrate, and the first shading plate is between the two driving units, and the driving unit can drive the two second shading plates close to the first shading plate to make the second shading plate face the photic zone of the driving substrate for preventing light entering the driving substrate. By locating the light valve device under the sub pixel, the dynamic contrast can be raised to promote the display effect.

First claim

What is claimed is:

1 . A light valve device, comprising a driving substrate having a shading zone and a photic zone, wherein the light valve device further comprises a shading unit, and the shading unit comprises a first shading plate, two driving units, and second shading plates respectively connected to the two driving units, and the driving unit and the first shading plate are fixed in the shading zone adjacent to the driving substrate, and the first shading plate is between the two driving units, and the driving unit can drive the two second shading plates close to the first shading plate to make the second shading plate face the photic zone of the driving substrate for preventing light entering the driving substrate.

2 . The light valve device according to claim 1 , wherein the light valve device further comprises a swing arm, and the second shading plate and the driving unit are connected with the swing arm, and the driving unit drives the swing arm to rotate the second shading plate in a facing region of the shading zone and a facing region of the photic zone to accomplish state switch of the light valve.

3 . The light valve device according to claim 2 , wherein a high scattering coated layer is coated on the shading plate, the driving unit and surfaces of the swing arm to raise a light use efficiency.

4 . A display panel comprising common electrode lines and a plurality of sub pixels, wherein each sub pixel comprises a light valve device, and the light valve device comprises a driving substrate having a shading zone and a photic zone, a shading unit, and the shading unit comprises a first shading plate, two driving units, and second shading plates respectively connected to the two driving units, and the driving unit and the first shading plate are fixed in the shading zone adjacent to the driving substrate, and the first shading plate is between the two driving units, and the driving unit can drive the two second shading plates close to the first shading plate to make the second shading plate face the photic zone of the driving substrate for preventing light entering the driving substrate.

5 . The display panel according to claim 4 , wherein the light valve device further comprises a swing arm, and the second shading plate and the driving unit are connected with the swing arm, and the driving unit drives the swing arm to rotate the second shading plate in a facing region of the shading zone and a facing region of the photic zone to accomplish state switch of the light valve.

6 . The display panel according to claim 5 , wherein a high scattering coated layer is coated on the shading plate, the driving unit and surfaces of the swing arm to raise a light use efficiency.

7 . The display panel according to claim 4 , wherein the display panel further comprises a color filter, a brightness enhancement film and a lower polarizer, and the lower polarizer is located between the color filter and the brightness enhancement film, and the light valve device is located between the brightness enhancement film and the lower polarizer.

8 . The display panel according to claim 7 , wherein the color filter comprises black zones distributed in matrix, and the shading zone of the driving substrate is oppositely located to the black zone.

9 . The display panel according to claim 4 , wherein the display panel further comprises a color filter, a brightness enhancement film and a light guide plate, and the brightness enhancement film is located between the color filter and the light guide plate, and the light valve device is located between the brightness enhancement film and the light guide plate.

10 . The display panel according to claim 9 , wherein the color filter comprises black zones distributed in matrix, and the shading zone of the driving substrate is oppositely located to the black zone.

11 . The display panel according to claim 4 , wherein the display panel further comprises a color filter, a light guide plate and a reflective sheet, and the light guide plate is located between the color filter and the reflective sheet, and the light valve device is located between the reflective sheet and the light guide plate.

12 . The display panel according to claim 11 , wherein the color filter comprises black zones distributed in matrix, and the shading zone of the driving substrate is oppositely located to the black zone.

Assignees

• Shenzhen China Star Optoelect
• Wuhan China Star Optoelectronics Technology Co Ltd
• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Jiang Yurui
• Li De-Jiun
• Cui Hongqing

Classifications

• G02F1/133514

  Colour filters · CPC title

• G02F1/133504

  Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606) · CPC title

• G02B26/02 Primary

  for controlling the intensity of light {(G02B26/004 takes precedence)} · CPC title

• G02F1/133528

  Polarisers · CPC title

• G02F2001/133507

  Physics · mapped topic