Display element array with optimized pixel and sub-pixel layout for use in reflective displays

• US 20050185003A1
• Filed: 02/18/2005
• Published: 08/25/2005
• Est. Priority Date: 02/24/2004
• Status: Active Grant

• Current Assignee: Barco NV
• Original Assignee: Barco NV
• Inventors: Thielemans, Robbie, Hille, Herbert Van, Dedene, Nele
• Granted Patent: US 7,443,466 B2
• Time in Patent Office: Days
• US Class Current: 345/694
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements

Abstract

A pixel structure is provided comprising a plurality of sub-pixels, each sub-pixel comprising at least two sub-sub-pixels, each sub-sub-pixel being for the emission of light of one of at least two colors, the sub-sub-pixels being uniformly arranged within the sub-pixel, each sub-pixel of one pixel comprising the same arrangement of sub-sub-pixels. Furthermore, a reflective display comprising pixels with the pixel structure of the invention is provided, having an high image quality.

Claims

1. A pixel structure comprising a plurality of sub-pixels, each sub-pixel comprising at least two sub-sub-pixels, each sub-sub-pixel being for the emission of light of one of at least two colours, the sub-sub pixels being uniformly arranged within said sub-pixel, each sub-pixel of one pixel comprising the same arrangement of sub-sub-pixels.

2. A pixel structure according to claim 1, wherein the pixel pitch is between 5 nm and 50 nm.

3. A pixel structure according to claim 1, wherein each of at least two colours is any of the primary colours blue, red and green.

4. A reflective display comprising:

a plurality of picture elements;

an addressing arrangement for addressing each picture element selectively and independently with one image datum; and

each picture element comprising a plurality of sub-pixels, each sub-pixel comprising at least two sub-sub-pixels, each sub-sub pixel being for the emission of light of one of at least two colours, the sub-sub pixels being uniformly arranged within said sub-pixel, each sub-pixel comprising the same arrangement of sub-sub-pixels.

5. A reflective display according to claim 4, further comprising means for driving said plurality of picture elements.

6. A reflective display according to claim 4, wherein the addressing arrangement is arranged such as to select different pixels, sub-pixels and/or sub-sub-pixels separately or at the same time.

7. A reflective display according to claim 5, wherein the means for driving said plurality of picture elements is arranged such as to select different picture elements, sub-pixels and/or sub-sub-pixels separately or at the same time.

8. A reflective display according to claim 5, wherein the means for driving said plurality of picture elements is arranged such as to selectively apply a particular resolution and/or bit depth.

9. A reflective display according to claim 8, wherein said particular resolution and/or bit depth is selectively applied within an area of the display.

10. A reflective display according to claim 8, wherein said particular resolution and/or bit depth is selectively applied within an area of a pixel.

11. A reflective display according to claim 8, wherein said particular resolution and/or bit depth is selectively applied within an area of a sub-pixel.

12. A reflective display according to claim 8, wherein said particular resolution and/or bit depth is selectively applied to an object within an image and displayed on the display.

13. A reflective display according to claim 5, wherein the means for driving said plurality of picture elements is arranged such as to perform intelligent internal bitmapping.

14. A reflective display according to claim 13, wherein said intelligent bitmapping allows increasing the effective display resolution without loosing bit depth.

15. A reflective display according to claim 4, the addressing arrangement and the picture elements being arranged for display of an arbitrary image, furthermore comprising an area between said plurality of picture elements, further comprising means for varying the luminance of said area.

16. A reflective display according to claim 15, wherein the luminance of the area between the picture elements is varied in order to optimise the image quality of the display.

17. A reflective display according to claim 4, wherein the reflective display is a tiled display.

18. A display comprising a plurality of pixels and an addressing arrangement for addressing each pixel independently and selectively to display an arbitrary image, further comprising an area between neighbouring pixels and means for varying the luminance of said area.