Transmissive display device using micro light modulator

• US 6,411,423 B2
• Filed: 12/07/2000
• Issued: 06/25/2002
• Est. Priority Date: 12/10/1999
• Status: Expired due to Term

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Ham, Yong Sung
• Primary Examiner(s): Dang, Hung Xuan
• Assistant Examiner(s): TRA, TUYEN Q
• Application Number:
  US09/730,846
• Publication Number:
  US 20010043385A1
• Time in Patent Office: 565 Days
• Field of Search: 359/290, 359/291, 359/295, 359/254, 359/233, 359/298, 359/454, 359/496, 353/88, 353/97, 353/75, 353/38, 353/87, 349/62, 349/66
• US Class Current: 359/290
• CPC Class Codes: G02B 26/02 for controlling the intensity of light G02B26/004 takes precedence

Abstract

A transmissive display device using a micro light modulator that is capable of improving a light efficiency. In the display device, a plurality of stationary members are provided on the first surface of the first transparent substrate in a line with and at a desired distance from each other in a stripe shape. A plurality of movable members are provided on the first transparent substrate and takes a bridge shape to be spaced from the stationary members and have each side overlapped with the stationary members. A light path controller is formed at each portion corresponding to the movable members on the second transparent substrate in such a manner to be spaced from the adjacent members, to reflect a light passing through a light path between each station member and each movable member such that the light is progressed perpendicularly to the second transparent substrate.

Claims

1. A transmissive display device using a micro light modulator, comprising:

first and second transparent substrates;

a plurality of stationary members provided on the first surface of the first transparent substrate in a line with and at a desired distance from each other in a stripe shape;

a plurality of movable members formed on the first transparent substrate with taking a bridge shape to be spaced from the stationary members and have each side overlapped with the stationary members; and

a light path controller having a plurality of light control members being formed at each portion corresponding to the movable members on the second transparent substrate in such a manner that each light control member is spaced from an adjacent light control member, for reflecting a light passing through a light path between each stationary member and each movable member such that the light is progressed perpendicularly to the second transparent substrate.

2. The transmissive display device according to claim 1, wherein each of said stationary members is formed from a multi-layer thin film including a conductive material layer and an insulating material layer, and each upper surface of the stationary members is insulated.

3. The transmissive display device according to claim 1, wherein each of said movable members is formed from an elastic material and a multi-layer thin film including a conductive material layer and an insulating material layer, and a surface of the movable members opposed to the stationary members is insulated.

4. The transmissive display device according to claim 1, wherein each of the stationary members and the movable members has an opaque surface.

5. The transmissive display device according to claim 1, wherein the light path controller has reverse-triangular structures formed continuously.

6. The transmissive display device according to claim 5, wherein the light path controller is made by depositing a polymer on the second transparent substrate and patterning it into a reverse-triangle shape, or by adhering a transparent tape attached with a polymer patterned into a reverse-triangle shape to the second transparent substrate, or by spray-injecting a polymer to coat it on the second transparent substrate.

7. The transmissive display device according to claim 5, wherein the light path controller is made by patterning the second transparent substrate into a reverse-triangle shape.

8. The transmissive display device according to claim 5, wherein the light path controller has a vertical angle of 45 to 85°

.

9. The transmissive display device according to claim 1, wherein the light path controller has reverse-rhombic structures continuously formed.

10. The transmissive display device according to claim 9, wherein the light path controller is made by depositing a polymer on the second transparent substrate and thereafter patterning it into a reverse-rhombus shape, or by adhering a transparent tape attached with a polymer patterned into a reverse-rhombus shape to the second transparent substrate, or by spray-injecting a polymer to coat it on the second transparent substrate.

11. The transmissive display device according to claim 9, wherein the light path controller is made by patterning the second transparent substrate into a reverse-rhombus shape.

12. The transmissive display device according to claim 9, wherein the side surface of the light path controller has an angle of 23 to 40°

with respect to the normal surface of the second transparent substrate.

13. The transmissive display device according to claim 1, wherein the light path controller is formed from a fine machined holographic film.

14. A transmissive display device using a micro light modulator comprising:

first and second substrates;

a plurality of stationary members on a first surface of the first substrate;

a plurality of movable members spaced apart from the plurality of stationary members and in between the first and second substrates;

at least two light path controllers on a side of the second substrate facing the first substrate in a position corresponding to the movable members and with a space on the second substrate positioned between each controller, the controllers allowing incident light to be transmitted through the second substrate at a point where the controller is positioned on the substrate.

15. The device of claim 14, wherein the controllers are transparent.

16. The device of claim 14, wherein the controllers direct light incident on the controller perpendicularly through the second substrate.

17. The device of claim 14, wherein each controller is triangular.

18. The device of claim 14, wherein each controller has a reverse-rhombus shape.

19. The device of claim 14, wherein each controller is formed of a fine machined holographic film.