Projection system based on self emitting display panel

• US 8,845,109 B2
• Filed: 11/21/2008
• Issued: 09/30/2014
• Est. Priority Date: 11/24/2007
• Status: Active Grant

• Current Assignee: Yong-Jing Wang
• Original Assignee: Yong-Jing Wang
• Inventors: Wang, Yong-Jing
• Primary Examiner(s): Dowling, William C
• Application Number:
  US12/744,014
• Publication Number:
  US 20100328550A1
• Time in Patent Office: 2,139 Days
• Field of Search: 353/31, 353/33, 353/34, 353/37, 353/94, 349/5, 349/7, 349/8, 348/742, 348/743, 348/750, 348/757, 348/800, 348/801, 359/204.1, 359/629, 359/634, 359/555, 251/431, 438/48, 438/54, 438/69
• US Class Current: 353/31
• CPC Class Codes: H04N 9/3138 using arrays of modulated light sources electroluminescent display devices G09G3/30
• CPC Class Codes: H04N 9/3173 wherein the projection device is specially adapted for enhanced portability

Abstract

A projection system based on self emitting display panels is described, in which the projection technology involves organic/inorganic electroluminescent display panels with spatially separated color segments. The color pictures are shown in three spatially separate segments. A color combination mechanism, such as dichroic mirrors, are used to merge the three color pictures to a color picture. One of the advantages of the present invention is that only the on state pixel is driven to a bright state that uses energy. The off state pixel need not be driven to a bright state and therefore the energy consumption is virtually nothing. Another advantage is that the system does not require a separate light source and display panel. Therefore the projection system can be made very compact, which is extremely useful for portable projection systems.

Claims

1. An image projection system comprising:

at least one self emitting display panel, wherein the display panel has a plurality of pixels, wherein said pixels emit at least two colors and are arranged in at least two adjacent segments displaying portions of color information pertaining to each of said colors, and wherein the portions of color information displayed by the segments are separated from each other; and

a light collection and optical device, wherein the light collection and optical device combines the separated portions of color information to produce a color image, and

wherein the light collection and optical device comprises at least two dichroic mirrors tilted at different angles.

2. The image projection system of claim 1, wherein the at least two dichroic mirrors are titled at angles of greater than zero degrees and less than 90 degrees.

3. The image projection system of claim 1, wherein the at least two dichroic mirrors have thicknesses of about 0.01 mm to about 100 mm.

4. The image projection system of claim 1, wherein the at least two dichroic mirrors are positioned at a location where the portions of color information displayed by the segments are separated from each other.

5. The image projection system of claim 1, wherein one or more lens units generates an image on a viewer'"'"'s eye.

6. An image projection system comprising:

at least one OLED display panel, wherein the display panel has a plurality of pixels, wherein said pixels emit at least two colors and are arranged in at least two adjacent segments displaying portions of color information pertaining to each of said colors, and wherein the portions of color information displayed by the segments are separated from each other;

a light collection and optical device, wherein the light collection and projection device combines the separated portions of color information to produce a color image, and wherein the light collection and optical device comprises two or more dichroic mirrors titled at different angles;

an image processor for separating the portions of color information displayed by the segments from each other and for pre-distorting the portions of color information; and

one or more lenses.

7. The image projection system of claim 6, further comprising at least two OLED panels, wherein the display panels are placed substantially close to each other.

8. The image projection system of claim 6, wherein the one or more lenses generates an image on a viewer'"'"'s eye.

9. The image projection system of claim 6, further comprising a display screen.

10. The image projection system of claim 6, wherein the one or more lenses generates an image on the display screen.

11. An image projection system comprising:

at least one self emitting display panel, wherein the display panel has a plurality of pixels, wherein said pixels emit at least two colors and are arranged in at least two adjacent segments displaying portions of color information pertaining to each of said colors, and wherein the portions of color information displayed by the segments are separated from each other; and

a light collection and optical device, wherein the light collection and optical device combines the separated portions of color information to produce a color image, and

wherein the light collection and optical device comprises a grating or a hologram to merge the adjacent segments together.