DISPLAY DEVICE

• US 20100231868A1
• Filed: 03/13/2009
• Published: 09/16/2010
• Est. Priority Date: 03/13/2009
• Status: Abandoned Application

• Current Assignee: Alvis Technologies, Inc.
• Original Assignee: Alvis Technologies, Inc.
• Inventors: CHEN, Guo-Zen, Chen, Chih-Hsiao, Wen, Ming-Hua
• Application Number:
  US12/403,680
• Publication Number:
  US 20100231868A1
• Time in Patent Office: Days
• US Class Current: 353/82
• CPC Class Codes: G03B 21/28 Reflectors in projection beam in illumination beam G03B21/2066
• 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

A display device is revealed. The display device includes a laser source for emitting a laser beam, a pre-optics for processing the laser beam, a light scan member such as a MEMS mirror for converting the processed laser beam into a scanning light beam, and/or a corresponding post-optics. A switch-control beam splitter is disposed on the light path of the laser beam, after the light scan member so as to divide the scanning light beam into a reflected light beam and a transmitted light beam. They are two different light paths and generate a virtual image as well as a real image respectively.

Claims

1. A display device comprising a laser source for emitting a laser beam, a pre-optics for forming parallel laser beam, light path arrangement, or laser beam focus adjustment, a light scan member for converting the processed laser beam into a scanning light beam, and/or a corresponding post-optics that is passed by the scanning light;

wherein a switch-control beam splitter is disposed on a light path of the laser beam, after the light scan member so that while the scanning light beam passing the beam splitter, part of the scanning light beam is reflected by the beam splitter to form a reflected light beam while part of the scanning light beam travels through the beam splitter to form a transmitted light beam and the two light beams are two separated emergent light beams in two different light paths respectively for virtual projection mode and real projection mode so as to generate a virtual image and a real image;

the switch-control beam splitter is switched along with various requirements so that the display device projects both real images and virtual images.

2. The device as claimed in claim 1, wherein the pre-optics is formed by collimators, cylindrical mirrors, reflectors, zoom lens sets, or combinations of them.

3. The device as claimed in claim 1, wherein the light scan member is a MEMS mirror.

4. The device as claimed in claim 1, wherein the post-optics includes a post-optics for virtual projection mode and a post-optics for real projection mode.

5. The device as claimed in claim 1, wherein the beam splitter is disposed on a light path of the scanning light beam, after the light scan member and is on a central optical axis of the scanning light beam symmetrically.

6. The device as claimed in claim 1, wherein

7. The device as claimed in claim 1, wherein ratio of the transmitted light beam to the reflected light beam is set to 90%:

10%.

8. The device as claimed in claim 1, wherein the transmitted light beam is projected to generate a real image while the reflected light beam is projected to generate a virtual image.

9. The device as claimed in claim 1, wherein size of the image of the virtual projection mode or the real projection mode of the display device is fixed.

10. The device as claimed in claim 1, wherein size of the image of the virtual projection mode or the real projection mode of the display device is adjustable.

11. The device as claimed in claim 10, wherein the adjustable size of the image is achieved by optical zoom of the pre-optics and/or post-optics.