Light Valve Display Using Low Resolution Programmable Color Backlighting

• US 20090160746A1
• Filed: 09/14/2007
• Published: 06/25/2009
• Est. Priority Date: 09/15/2006
• Status: Abandoned Application

• Current Assignee: Istvan Gorog
• Original Assignee: Istvan Gorog
• Inventors: Gorog, Istvan
• Application Number:
  US12/083,452
• Publication Number:
  US 20090160746A1
• Time in Patent Office: Days
• US Class Current: 345/88
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix

Abstract

A display comprises a front-end component having a matrix of neutral light valves that defines the resolution of the display. A backlight unit provides backlighting for the front-end component and has a plurality of individual elements grouped into repeat units, wherein the individual elements in the repeat units differ in color and the repeat units have a resolution less than the display resolution. All individual elements in individual repeat units are capable of simultaneously emitting light incident on more than one neutral light valve.

Claims

1. A display comprising:

a front-end component having a plurality of neutral light valves, the neutral light valves defining the display resolution;

a backlight unit having plurality of individual elements grouped into repeat units, the individual elements in the repeat units differ in color, the repeat units have a resolution less than the display resolution, the individual elements in individual repeat units emit light in a non-color sequential manner incident on more than one neutral light valve;

a low pass-filter that receives and filters a full resolution color RGB information of video to produce filtered low resolution color information; and

a scaled backlight drive receives the filtered low resolution color information and scales local color components by a local scaling parameter, the scaled backlight drive correlates a dominant local low resolution color information to maximum possible luminance for the color components and accordingly drives the individual elements in the individual repeat units.

2. The display of claim 1, wherein the individual elements simultaneously emit light.

3. The display of claim 2, wherein the light valves control luminance.

4. The display of claim 3, wherein the light valves are programmable.

5. The display of claim 4, wherein the backlight unit is a tricolor system.

6. The display of claim 5, wherein the backlight unit uses phosphor material which decay in a timeframe shorter than a frame period.

7. The display of claim 6, wherein the backlight unit is a field emission device.

8. The display of claim 7, wherein the front-end component is a liquid crystal device.

9. The display of claim 2, wherein the backlight is a programmable field emission device and the front-end component is a liquid crystal device.

10. A method for displaying video images in a display having a low resolution multicolor backlight unit and a network of neutral light valves that define a resolution of the display, comprising the steps of:

low-pass filtering a full resolution color RGB information, thereby producing low resolution color information;

scaling the low resolution color information based on local color components by a local scaling parameter, wherein a dominant local low resolution color information is scaled to a maximum possible luminance for color components, while maintaining predetermined colorimetry; and

accordingly driving individual color elements in repeat units of the low resolution multicolor backlight unit.