High Efficiency Display Utilizing Simultaneous Color Intelligent Backlighting and Luminescence Controllling Shutters

• US 20090073108A1
• Filed: 09/14/2007
• Published: 03/19/2009
• Est. Priority Date: 09/15/2006
• Status: Abandoned Application

• Current Assignee: Istvan Gorog
• Original Assignee: Istvan Gorog
• Inventors: Gorog, Istvan
• Application Number:
  US12/083,449
• Publication Number:
  US 20090073108A1
• Time in Patent Office: Days
• US Class Current: 345/102
• 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 device for displaying images at a predetermined frame rate comprising:

a front-end component having a matrix 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 incident on more than one neutral light valve in a non-color sequential manner;

a pixel converter receives tricolor input signal of M×

N matrix and reduces the tricolor input signal to a smaller I×

J matrix;

an amplitude mapping element scales up i,j pixel values of the reduced I×

J matrix for driving the backlight unit;

a calculator element calculates luminance values YB(i,j) from the i,j pixel value;

optical estimator and resample elements receive the luminance values YB(i,j) and calculates an estimated luminance produced by the backlight at a light valve optical input plane YO(i,j) and resamples the estimated luminance to obtain a full resolution luminance distribution YO(m,n);

a scale element performs local linear scaling of the full resolution luminance distribution YO(m,n) to yield a scaled backlight luminance estimate YB(m,n), wherein a maximum value of the local backlight luminance estimate corresponds to a maximum value of the local input luminance Y(m,n); and

a dividing element divides input luminance Y(m,n) by the scaled backlight luminance estimate YB(m,n) used to generate an output for driving the neutral light valves.

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 front-end component is a liquid crystal device.