IP Library Granted Patent US 7,944,524
Granted Patent B2
US 7,944,524 · App. 12/067,282 · Granted May 17, 2011

Display apparatus with particular light control and light reflecting

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Quick Facts
Patent No.
US 7,944,524
App. No.
12/067,282
Granted
May 17, 2011
Kind
B2
Abstract

The present invention is directed to the provision of a high-contrast display apparatus. The display apparatus of the present invention includes a light source, a display section having an electro-optical conversion device for transmitting or scattering light introduced from the light source, light control means for reflecting the light introduced from the light source at a prescribed reflection angle, and a light reflecting member for causing the light reflected by the light control means and transmitted through the electro-optical conversion device to be reflected outside the field of view of a viewer who is viewing the display section straight on.

Claims (16)

1. A display apparatus comprising:

a light source;

a display section having an electro-optical conversion device for transmitting or scattering light introduced from said light source;

light control means for reflecting the light introduced from said light source at a prescribed reflection angle; and

a light reflecting member for causing the light reflected by said light control means and transmitted through said electro-optical conversion device to be reflected outside the field of view of a viewer who is viewing said display section straight on.

2. The display apparatus according to claim 1 , wherein said reflection angle is not smaller than 30°, and not larger than 75°.

3. The display apparatus according to claim 1 or 2 , wherein said electro-optical conversion device distributes scattered light within the field of view of said viewer by scattering the light introduced from said light source.

4. The display apparatus according to claim 1 , wherein said electro-optical conversion device transmits or scatters said introduced light, depending on an applied voltage.

5. The display apparatus according to claim 1 , wherein the light from said light source is introduced through an edge face of said display section, said light control means is disposed on a viewer side of said display section, and said light reflecting member is disposed on an opposite side of said display section from said light control means.

6. The display apparatus according to claim 3 , wherein the light from said light source is introduced through an edge face of said display section, said light control means is disposed on a viewer side of said display section, and said light reflecting member is disposed on an opposite side of said display section from said light control means.

7. The display apparatus according to claim 2 , wherein said electro-optical conversion device transmits or scatters said introduced light, depending on an applied voltage.

8. The display apparatus according to claim 7 , wherein the light from said light source is introduced through an edge face of said display section, said light control means is disposed on a viewer side of said display section, and said light reflecting member is disposed on an opposite side of said display section from said light control means.

9. The display apparatus according to claim 2 , wherein the light from said light source is introduced through an edge face of said display section, said light control means is disposed on a viewer side of said display section, and said light reflecting member is disposed on an opposite side of said display section from said light control means.

10. The display apparatus according to claim 3 , wherein said electro-optical conversion device transmits or scatters said introduced light, depending on an applied voltage.

11. The display apparatus according to claim 10 , wherein the light from said light source is introduced through an edge face of said display section, said light control means is disposed on a viewer side of said display section, and said light reflecting member is disposed on an opposite side of said display section from said light control means.

12. The display apparatus according to claim 4 , wherein the light from said light source is introduced through an edge face of said display section, said light control means is disposed on a viewer side of said display section, and said light reflecting member is disposed on an opposite side of said display section from said light control means.

Assignments (2)
CHANGE OF NAME Recorded Jan 25, 2017
From: CITIZEN HOLDINGS CO., LTD.
To: CITIZEN WATCH CO., LTD.
Reel/Frame 041479/0804 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 1, 2011
From: AKIYAMA, TAKASHI; KAWADA, SACHIKO
To: CITIZEN HOLDINGS CO., LTD.
Reel/Frame 026060/0708 →