Display Apparatus Using Microlens

• US 20080211995A1
• Filed: 03/20/2007
• Published: 09/04/2008
• Est. Priority Date: 04/12/2006
• Status: Abandoned Application

• Current Assignee: Korea Advanced Institute of Science and Technology
• Original Assignee: Korea Advanced Institute of Science and Technology
• Inventors: Jeon, Jin-Wan, Lee, Joo-Hyung, Lim, Koeng Su, Kim, Dae-Hyun, Yoon, Jun-Eo
• Application Number:
  US12/090,229
• Publication Number:
  US 20080211995A1
• Time in Patent Office: Days
• US Class Current: 349/95
• CPC Class Codes: H04N 3/08 having a moving reflector
• CPC Class Codes: H04N 5/7458 the modulator being an array of deformable mirrors, e.g. digital micromirror device [DMD]
• CPC Class Codes: H04N 9/3152 for shaping the light beam beam shaping per se G02B27/09

Abstract

Provided is a display apparatus using a micromirror or an image display device. The display apparatus is designed to eliminate dark regions, usually formed by pixel partitions or black matrixes, display a high-quality image by increasing light usage efficiency, and improve the power consumption. A display apparatus using a microlens includes a micromirror array, a substrate, and a microlens array. The micromirror array includes a plurality of micromirrors arranged to reflect incident light rays from a light source. The substrate supports the micromirror array. The microlens array includes a plurality of microlenses disposed between the light source and the micromirror array to condense the incident light rays from the light source upon the micromirror array and correct a traveling path of reflected light rays from the micromirror array.

Claims

1. A display apparatus using a microlens, the display apparatus comprising:

a micromirror array including a plurality of micromirrors arranged to reflect incident light rays from a light source;

a substrate supporting the micromirror array; and

a microlens array including a plurality of microlenses disposed between the light source and the micromirror array to condense the incident light rays from the light source upon the micromirror array and correct a traveling path of reflected light rays from the micromirror array.

2. The display apparatus of claim 1, wherein the micromirrors each are disposed to be rotatable over the substrate.

3. The display apparatus of claim 1, wherein the incident light rays passing through the microlens array are condensed upon reflection surfaces of the micromirrors.

4. The display apparatus of claim 1, wherein the microlenses of the microlens array are disposed adjacent to each other.

5. The display apparatus of claim 1, wherein the reflected light rays from the individual micromirrors impinge on one of the microlenses of the microlens array.

6. The display apparatus of claim 1, wherein the reflected light rays from the micromirror array are emitted after being corrected to parallel light rays by the microlens array.

7. A display apparatus using a microlens, the display apparatus comprising:

a scanning micromirror reflecting incident light rays from a light source;

a substrate supporting the scanning micromirror;

a first microlens disposed between the light source and the scanning micromirror to condense the incident light rays from the light source upon a reflection surface of the scanning micromirror; and

a second microlens disposed in a path of reflected light rays from the scanning micromirror to correct a traveling path of the reflected light rays.

8. The display apparatus of claim 7, wherein the scanning micromirror is disposed to be rotatable over the substrate.

9. The display apparatus of claim 7, wherein the first microlens and the second microlens each include an array of microlenses.

10. The display apparatus of claim 9, wherein the incident light rays are divided into unit blocks according to the number of the microlenses of the first microlens and directed towards the scanning micromirror.

11. The display apparatus of claim 7, wherein the first microlens and the second microlens each include an array of microlenses, and the scanning micromirror includes an array of scanning micromirrors.

12. The display apparatus of claim 11, wherein the incident light rays passing through the first microlens are divided into unit blocks according to the number of the microlenses of the first microlens, and the divided incident light rays are condensed upon the respective scanning micromirrors.

13. A display apparatus using a microlens, the display apparatus comprising:

a scanning micromirror reflecting incident light rays from a light source;

a substrate supporting the scanning micromirror;

a first Fresnel lens disposed between the light source and the scanning micromirror to condense the incident light rays from the light source upon a reflection surface of the scanning micromirror; and

a second Fresnel lens disposed in a path of reflected light rays from the scanning micromirror to correct a traveling path of the reflected light rays.

14. The display apparatus of claim 13, wherein the scanning micromirror is disposed to be rotatable over the substrate.

15. A display apparatus using a microlens, the display apparatus comprising:

a liquid crystal panel including a plurality of unit pixels arranged in a matrix form to display an image through transmitting or shielding incident light rays from a light source;

a first microlens array including a plurality of microlenses disposed between the light source and the liquid crystal panel to condense the incident light rays from the light source upon the unit pixels; and

a second microlens array including a plurality of microlenses disposed in a path of projected light rays from the liquid crystal panel to correct a traveling path of the projected light rays from the unit pixels.

16. The display apparatus of claim 15, wherein the unit pixels of the liquid crystal panel are spaced apart from each other for isolation of the unit pixels.

17. The display apparatus of claim 15, wherein the microlenses of each of the first an d second microlens arrays are disposed adjacent to each other.

18. A display apparatus using a microlens, the display apparatus comprising:

a display panel including a plurality of unit pixels emitting rays of light on a substrate; and

a microlens array including a plurality of microlenses formed in a path of the rays of the light emitted from the display panel to correct a traveling path of the emitted light rays.

19. The display apparatus of claim 18, wherein the unit pixels of the display panel are spaced apart from each other for isolation.

20. The display apparatus of claim 18, wherein the microlenses of the micromirror array are disposed adjacent to each other.