PROJECTOR

• US 20070019921A1
• Filed: 07/10/2006
• Published: 01/25/2007
• Est. Priority Date: 07/20/2005
• Status: Active Grant

• Current Assignee: Columbia Peak Ventures, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: TAKEDA, Takashi, YONEKUBO, Masatoshi
• Granted Patent: US 7,477,435 B2
• Time in Patent Office: Days
• US Class Current: 385/147
• CPC Class Codes: G03B 21/006 using LCD's

Abstract

A projector includes: a light source device that emits a laser beam toward a projected surface; a scanning unit that scans the laser beam emitted from the light source device; a light diffusion member that diffuses the laser beam used for scanning by the scanning unit; and a converging unit that converges the laser beam going out from the light diffusion member on the protected surface.

Claims

1. A projector comprising:

a light source device that emits a laser beam toward a projected surface;

a scanning unit that scans the laser beam emitted from the light source device;

a light diffusion member that diffuses the laser beam used for scanning by the scanning unit; and

a converging unit that converges the laser beam going out from the light diffusion member on the projected surface.

2. The projector according to claim 1 comprising another converging unit that converges the laser beam emitted from the light source device onto the light diffusion member.

3. The projector according to claim 1 comprising a collimating unit that collimates the laser beam emitted from the scanning unit.

4. The projector according to claim 1 comprising a diffused state changing unit that temporarily changes the diffused state of the laser beam emitted from the light diffusion member.

5. The projector according to claim 4, wherein the diffused state changing unit is a rotational unit that rotates the light diffusion member within an incoming surface of the light diffusion member.

6. The projector according to claim 4, wherein the diffused state changing unit is a moving unit that moves the light diffusion member within the incoming surface of the light diffusion member.