Optical engine and image projecting apparatus having the same

• US 20060238645A1
• Filed: 04/13/2006
• Published: 10/26/2006
• Est. Priority Date: 04/21/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Goo, Gyo-hwan
• Granted Patent: US 7,557,867 B2
• Time in Patent Office: Days
• US Class Current: 348/373
• CPC Class Codes: H04N 5/7458 the modulator being an array of deformable mirrors, e.g. digital micromirror device [DMD]
• CPC Class Codes: H04N 9/3141 Constructional details thereof details not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

An optical engine is provided that includes a base frame, a video device assembly for generating a video signal, and a driving substrate detachably coupled to the video device assembly for driving the video device assembly. The driving substrate is coupled to the base frame such that the video device assembly is disposed therebetween. A first coupling unit couples the driving substrate and the video device assembly to the base frame such that a position of the video device assembly with respect to the base frame is adjustable. A second coupling unit couples the video device assembly to the base frame to secure the adjusted position of the video device assembly to the base frame. The optical engine, and an image projecting apparatus having the same, allow the driving substrate to be replaced without adjusting a position of the video device assembly.

Claims

1. An optical engine, comprising:

a base frame;

a video device assembly to generate a video signal;

a driving substrate detachably coupled to the video device assembly to drive the video device assembly, and adapted to be coupled to the base frame such that the video device assembly is disposed therebetween;

a first coupling unit adapted to couple the driving substrate and the video device assembly to the base frame such that a position of the video device assembly with respect to the base frame is adjustable; and

a second coupling unit adapted to couple the video device assembly to the base frame when the position of the video device assembly has been adjusted.

2. The optical engine according to claim 1, wherein the second coupling unit includes

a second coupling member adapted to pass through the driving substrate to couple the video device assembly to the base frame;

and

a penetrating part in the driving substrate through which the second coupling member passes.

3. The optical engine according to claim 2, wherein

a plurality of second coupling units couple the video device assembly to the base frame.

4. The optical engine according to claim 3, wherein

the penetrating parts form a polygonal shape on the driving substrate.

5. The optical engine according to claim 2, wherein

the second coupling member is a bolt.

6. The optical engine according to claim 1, wherein the video device assembly includes

a digital micromirror device (DMD) panel.

7. The optical engine according to claim 1, wherein the first coupling unit includes

a first coupling member adapted to couple the driving substrate and the video device assembly to the base frame;

and

a first coupler in the video device assembly and the driving substrate wherein an internal diameter thereof is larger than an outer diameter of the first coupling member.

8. The optical engine according to claim 1, wherein

the base frame has a seating member on a first side thereof, and the video device assembly and the driving substrate are coupled to the seating member.

9. The optical engine according to claim 7, wherein

a flexible member is disposed on the first coupling member to facilitate adjusting the video device assembly with respect to the base frame.

10. The optical engine according to claim 9, wherein

the first coupler in the driving substrate has a stepped portion adapted to receive the flexible member.

11. The optical engine according to claim 10, wherein

a plurality of first coupling units couple the video device assembly and the driving substrate to the base frame.

12. The optical engine according to claim 11, wherein

the plurality of first coupling units form a polygonal shape on the driving substrate.

13. An image projecting apparatus, comprising:

a light source;

an optical engine adapted to change light emitted from the light source into a video signal and to project the video signal;

the optical engine including

a base frame;

a video device assembly adapted to generate the video signal;

a driving substrate detachably coupled to the video device assembly to drive the video device assembly, and adapted to be coupled to the base frame such that the video device assembly is disposed therebetween;

a plurality of first coupling units adapted to couple the driving substrate and the video device assembly to the base frame such that a position of the video device assembly with respect to the base frame is adjustable; and

a plurality of second coupling units adapted to couple the video device assembly to the base frame when the position of the video device assembly has been adjusted.

14. The image projecting apparatus according to claim 13, wherein the second coupling unit includes

a second coupling member adapted to couple the video device assembly to the base frame by passing through the driving substrate;

and

a penetrating part in the driving substrate through which the second coupling member passes.

15. The image projecting apparatus according to claim 14, wherein

the base frame has a seating member on a first side thereof, and the video device assembly and the driving substrate are coupled to the seating member.

16. The image projecting apparatus according to claim 13, wherein

the base frame has a seating member on a first side thereof, and the video device assembly and the driving substrate are coupled to the seating member.

17. The image projecting apparatus according to claim 13, wherein the first coupling unit includes

a first coupling member adapted to couple the driving substrate and the video device assembly to the base frame;

and

a first coupler in the video device assembly and the driving substrate wherein an internal diameter thereof is larger than an outer diameter of the first coupling member.

18. The image projecting apparatus according to claim 17, wherein

a flexible member is disposed on the first coupling member to facilitate adjusting the video device assembly with respect to the base frame.

19. The image projecting apparatus according to claim 18, wherein

the first coupler in the driving substrate has a stepped portion adapted to receive the flexible member.

20. The optical engine according to claim 14, wherein

the penetrating part has a diameter larger than the maximum outer diameter of the second coupling member.