Transmissive display device using micro light modulator

• US 6,700,554 B2
• Filed: 12/04/2000
• Issued: 03/02/2004
• Est. Priority Date: 12/04/1999
• Status: Expired due to Term

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Kim, Je Hong, Ham, Yong Sung, Baek, Heum Il
• Primary Examiner(s): Shankar, Vijay
• Assistant Examiner(s): Dharia, Prabodh M.
• Application Number:
  US09/727,515
• Publication Number:
  US 20010013847A1
• Time in Patent Office: 1,184 Days
• Field of Search: 345/84, 345/102, 345/108, 345/150, 345/211-214, 345/725, 345/75.2, 359/223, 359/233, 359/291, 359/227, 349/177
• US Class Current: 345/75.2
• CPC Class Codes: G02B 26/0816 by means of one or more reflecting elements
• CPC Class Codes: H04N 5/70 Circuit details for electroluminescent devices
• CPC Class Codes: H04N 5/7416 involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal

Abstract

A transmissive display device using a micro light modulator that is capable of improving a light efficiency. In the display device, light-path converting members are provided on stationary members to change a path of a light inputted obliquely through stationary members and movable members vertically with respect to a display screen.

Claims

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

a plurality of stationary members and a plurality of movable members, said movable members being floatedly suspended above said stationary members to open and close a light path;

light-path converting members, being provided on the stationary members, for changing a path of a light inputted obliquely through the stationary members and the movable members vertically with respect to a display screen, said light-path converting members being different from said movable members.

2. The transmissive display device according to claim 1, wherein the light-path converting members are made from a material having a high reflectivity.

3. The transmissive display device according to claim 2, wherein the light-path converting members are selected from any one of aluminum (Al) and silver (Ag).

4. The transmissive display device according to claim 3, wherein each of the light-path converting members has a triangular section, a trapezoidal section, a semi-circular section or an asymmetrical polyhedron section.

5. The transmissive display device according to claim 1, wherein the movable members are provided on a rear substrate, and the stationary members are provided on a front substrate opposed to the rear substrate.

6. The transmissive display device according to claim 5, further comprising:

light-shielding members, being provided on the rear substrate in such a manner to overlap with each side of the movable members, for shutting off an incident light.

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

a plurality of stationary members and a plurality of movable members to open and close a light path, said movable members being floatedly suspended above said stationary members;

light-path converting members, being provided on the stationary members, for changing a path of a light inputted obliquely between the stationary members and the movable members vertically with respect to a display screen and for constantly keeping a distance between a rear substrate and a front substrate opposed to each other, said light-path converting members being different from said movable members.

8. The transmissive display device according to claim 7, wherein the light-path converting members are made from a material having a high reflectivity.

9. The transmissive display device according to claim 7, wherein the light-path converting members are selected from any one of aluminum (Al) and silver (Ag).

10. The transmissive display device according to claim 7, wherein each of the light-path converting members has a triangular section, a trapezoidal section, a semi-circular section or an asymmetrical polyhedron section.

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

a plurality of stationary members and a plurality of movable members to open and close a light path, said movable members being floatedly suspended above said stationary members;

light-path converting members, being provided on the stationary members, for changing a path of a light inputted obliquely between the stationary members and the movable members vertically with respect to a display screen said light-path converting members being different from said movable members,

wherein an angle of an incidence surface at one side of the light-path converting members is set to more than 52°

on a basis of a display screen.

12. The transmissive display device according to claim 11, wherein the light-path converting members are made from a material having a high reflectivity.

13. The transmissive display device according to claim 12, wherein the light-path converting members are selected from any one of aluminum (Al) and silver (Ag).

14. The transmissive display device according to claim 13, wherein each of the light-path converting members has a triangular section, a trapezoidal section, a semi-circular section or an asymmetrical polyhedron section.

15. The transmissive display device according to claim 11, wherein an angle of an incidence surface at one side of the light-path converting members is set in a range of 52°

to 70°

on a basis of a display screen.

16. The transmissive display device according to claim 11, wherein the light-path converting members have a larger height than a distance between the stationary members and the movable members.

17. The transmissive display device according to claim 11, wherein a length of the bottom sides of the light-path converting members is set to be smaller than a distance between the movable members.