Laser projector

• US 20070258050A1
• Filed: 10/20/2006
• Published: 11/08/2007
• Est. Priority Date: 05/02/2006
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Ki-Tae, Lee, Jung-Kee, Park, Mun-Kue, Kim, Bum-Jin
• Application Number:
  US11/584,727
• Publication Number:
  US 20070258050A1
• Time in Patent Office: Days
• US Class Current: 353/31
• CPC Class Codes: H04N 9/3129 scanning a light beam on the display screen scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161

Abstract

Provided is a laser projector. The laser projector includes a light module to generate green light, and laser light sources to generate red and blue light. The light generated in the light module and the laser light sources travels in a rectangular or a tetragonal path inside the laser projector. It can then outputted outside the laser projector.

Claims

1. A laser projector, comprising:

a light module to generate green light; and

laser light sources to generate red and blue light,

wherein the light generated in the light module and the laser light sources travels in a rectangular or a tetragonal path inside the laser projector.

2. The laser projector of claim 1, wherein the light generated in the light module and the laser light sources travels is outputted outside the laser projector.

3. The laser projector of claim 1, further comprising:

a first reflection mirror to reflect the green light in a direction vertical with an exit direction of the green light;

a second reflection mirror to reflect the green light reflected by the first reflection mirror, in a direction vertical with a travel path, from the first reflection mirror; and

first and second band pass filters to transmit the green light reflected by the second reflection mirror, and reflect the red and blue light from the laser light sources.

4. The laser projector of claim 3, further comprising:

a third reflection mirror to reflect the green, red, and blue lights incident from the second band pass filter, in a direction vertical with a travel path;

a spatial light modulator to spatially modulate the light incident from the third reflection mirror;

a scan mirror to project the light spatially modulated in the spatial light modulator, outside the laser projector; and

a diaphragm positioned between the scan mirror and the spatial light modulator.

5. The laser projector of claim 3, further comprising:

a diffusion lens between the first reflection mirror and the second reflection mirror;

a collimation lens between the second reflection mirror and the first band pass filter;

an irradiation optical system between a rotary mirror and the spatial optical modulator; and

a light detector to detect part of the green light transmit from the second reflection mirror, and monitor intensity of the green light generated from the light module.

6. The laser projector of claim 5, wherein the light detector comprises a photo diode.

7. The laser projector of claim 3, wherein the scan mirror employs a rotatable polygonal mirror.

8. The laser projector of claim 5, wherein the irradiation optical system includes

a diffusion lens and a collimation lens to diffuse and collimate the light incident from the second reflection mirror, in a Y-axis direction;

and

convergence lenses to converge the light incident from the second reflection mirror, in an X-axis direction.

9. A laser projector, comprising:

a light module to generate green light; and

laser light sources to generate red and blue light,

wherein the light generated in the light module and the laser light sources circulates by 270°

or 360°

inside the laser projector.

10. The laser projector of claim 9, wherein the light generated in the light module and the laser light sources travels is outputted outside the laser projector.