Light source device of laser LED and projector having the same device

• US 20080143973A1
• Filed: 10/12/2006
• Published: 06/19/2008
• Est. Priority Date: 10/12/2006
• Status: Abandoned Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Wu, Jing Miau
• Application Number:
  US11/580,260
• Publication Number:
  US 20080143973A1
• Time in Patent Office: Days
• US Class Current: 353/33
• CPC Class Codes: G02B 27/0955 Lenses lenses per se G02B3/00
• CPC Class Codes: G02B 27/0994 Fibers, light pipes optical fibers per se G02B6/02
• CPC Class Codes: G03B 21/008 using micromirror devices
• CPC Class Codes: G03B 21/2033 LED or laser light sources
• CPC Class Codes: G03B 21/208 Homogenising, shaping of the illumination light
• CPC Class Codes: G03B 33/12 using beam-splitting or beam-combining systems, e.g. dichroic mirrors
• CPC Class Codes: H04N 9/3111 for displaying the colours sequentially, e.g. by using sequentially activated light sources sequential projection in colour photography G03B33/08
• CPC Class Codes: H04N 9/3161 using laser light sources using laser beams scanning the display screen H04N9/3129
• CPC Class Codes: H04N 9/3164 using multiple light sources

Abstract

A mono-panel projector having a light source device of laser LED is provided with at least one laser LED light source, at least one light magnifying element, a cross type color filter, a light guiding element, a prism module, a digital micromirror device, and a projecting lens module. The laser LED light source generates three small-diameter laser beams of red, green, and blue primary colors all of which are magnified by the light magnifying element, and concentrated into a composite laser beam by the cross type color filter. After that, the composite laser beam is guided by the light guiding element, and projected to the digital micromirror device via the prism module for generating images on the digital micromirror device. Then, the images are reflected to the projecting lens module followed by projecting out of the projecting lens module so that the projector of the present invention provides higher resolution, higher sharpness, brighter images, and higher color saturation by the laser LED light source while providing advantages of minimizing volume, lowering power consumption, enhancing reaction speed, elongating life time, and increasing power efficiency.

Claims

1. A light source device of laser LED for a projector, comprising:

at least one laser LED light source for generating a parallel concentrated beam; and

at least one light magnifying element corresponding to the laser LED light source for magnifying the parallel concentrated beam generated from the laser LED light source in accordance with a predetermined angle.

2. The light source device of laser LED as claimed in claim 1, wherein said laser LED light source comprises three sets of laser LEDs for generating three parallel concentrated beams of red, green, and blue primary colors, respectively.

3. The light source device of laser LED as claimed in claim 1, wherein said light magnifying element is selected from a convex lens or a concave lens.

4. The light source device of laser LED as claimed in claim 1, wherein said light magnifying element is made of glass or transparent acrylic material.

5. The light source device of laser LED as claimed in claim 1, wherein said predetermined angle of the light magnifying element for magnifying the parallel concentrated beams is ranged from 30 degrees to 60 degrees.

6. The light source device of laser LED as claimed in claim 2, wherein said projector further comprises:

a cross type color filter corresponding to the laser LED light source for combining the three parallel concentrated beams of red, green, and blue primary colors generated from the three sets of laser LEDs into a composite beam having the same optical axis;

a light guiding element corresponding to the light magnifying element for guiding the magnified composite beam to reflect within a predetermined range in the light guiding element;

a prism module corresponding to the light guiding element for reflecting the composite beam projected from the light guiding element;

a digital micromirror device corresponding to the prism module for receiving the composite beam projected from the prism module to generate images which are reflected back to the prism module; and

a projecting lens module for projecting the images generated from the digital micromirror device and reflected through the prism module out of the projecting lens module.

7. The light source device of laser LED as claimed in claim 6, wherein said light guiding element is selected from a light pipe or a combination of a condensing lens and a micromirror lens array.

8. The light source device of laser LED as claimed in claim 7, wherein said micromirror lens array is provided with a plurality of micromirror lenses.

9. A projector having a light source device of laser LED, comprising:

at least one laser LED light source for generating a parallel concentrated beam;

at least one light magnifying element for magnifying the parallel concentrated beam generated from the laser LED light source in accordance with a predetermined angle;

a light guiding element corresponding to the light magnifying element for guiding the magnified composite beam to reflect within a predetermined range in the light guiding element;

a prism module corresponding to the light guiding element for reflecting the composite beam projected from the light guiding element;

a digital micromirror device corresponding to the prism module for receiving the composite beam projected from the prism module to generate images which are reflected back to the prism module; and

a projecting lens module for projecting the images generated from the digital micromirror device and reflected through the prism module out of the projecting lens module.

10. The projector as claimed in claim 9, wherein said light magnifying element is selected from a convex lens or a concave lens.

11. The projector as claimed in claim 9, wherein said light magnifying element is made of glass or transparent acrylic material.

12. The projector as claimed in claim 9, wherein said predetermined angle of the light magnifying element for magnifying the parallel concentrated beams is ranged from 30 degrees to 60 degrees.

13. The projector as claimed in claim 9, wherein said light guiding element is selected from a light pipe or a combination of a condensing lens and a micromirror lens array.

14. The projector as claimed in claim 13, wherein said micromirror lens array is provided with a plurality of micromirror lenses.

15. A light source device of laser LED for a projector, comprising:

at least one laser LED light source provided with three sets of laser LEDs for generating three parallel beams of red, green, and blue primary colors, respectively;

a cross type color filter corresponding to the three sets of laser LEDs for combining the three parallel beams of red, green, and blue primary colors generated from the three sets of laser LEDs into a parallel composite beam having the same optical axis; and

at least one light magnifying element corresponding to the cross type color filter for magnifying the parallel composite beam projected from the cross type color filter in accordance with a predetermined angle ranged from 30 degrees to 60 degrees.

16. The light source device of laser LED as claimed in claim 15, wherein said light magnifying element is selected from a convex lens or a concave lens.

17. The light source device of laser LED as claimed in claim 15, wherein said light magnifying element is made of glass or transparent acrylic material.