HDR DISPLAYS WITH DUAL MODULATORS HAVING DIFFERENT RESOLUTIONS

• US 20070268224A1
• Filed: 07/31/2007
• Published: 11/22/2007
• Est. Priority Date: 03/13/2002
• Status: Active Grant

• Current Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Original Assignee: Dolby Laboratories Incorporated
• Inventors: Seetzen, Helge, Stuerzlinger, Wolfgang, Ward, Greg, Whitehead, Lorne, Graham, Don
• Granted Patent: US 8,125,425 B2
• Time in Patent Office: Days
• US Class Current: 345/84
• CPC Class Codes: G02F 1/133524 Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133613 characterized by the sequence of light sources
• CPC Class Codes: G02F 1/1347 Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
• CPC Class Codes: G09G 2300/023 Display panel composed of stacked panels
• CPC Class Codes: G09G 2310/024 Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0271 Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0633 by amplitude modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2320/064 by time modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2320/066 for control of contrast
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 2330/08 Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 3/34 by control of light from an independent source
• CPC Class Codes: G09G 3/3426 : the different display panel areas being distributed in two dimensions, e.g. matrix
• CPC Class Codes: G09G 3/3611 : Control of matrices with row and column drivers
• CPC Class Codes: H01J 63/06 : Lamps with luminescent screen excited by the ray or stream
• CPC Class Codes: H04N 9/3102 : using two-dimensional electronic spatial light modulators micromechanical modulators as such G02B26/0833; liquid crystal modulators as such G02F1/13
• CPC Class Codes: H04N 9/3126 : for spatial light modulators in series
• CPC Class Codes: H04N 9/3155 : for controlling the light source light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406
• CPC Class Codes: H04N 9/3194 : including sensor feedback
• CPC Class Codes: H04N 9/3197 : using light modulating optical valves
• CPC Class Codes: H05B 45/20 : Controlling the colour of the light

Abstract

A display has a screen which incorporates a light modulator. The screen may be a front projection screen or a rear-projection screen. The screen is illuminated with light from a light source comprising an array of controllable light-emitters. The controllable-emitters and elements of the light modulator may be controlled to adjust the intensity of light emanating from corresponding areas on the screen. The display may provide a high dynamic range.

Claims

1. A display, comprising:

an array of pixels, each pixel comprising a set of primary colored individually controllable lights;

a controller configured to control an intensity of light emitted from each controllable light so as to modulate light emitted from the array of pixels;

a dimming panel configured to further modulate the light emitted from the array of pixels;

wherein a resolution of the controller'"'"'s modulation and a resolution of the dimming panel'"'"'s modulation are different.

2. A display according to claim 1 wherein the dimming panel'"'"'s modulation has a higher resolution than the controller'"'"'s modulation.

3. A display according to claim 1 wherein the dimming panel is configured to shut off light emitted from portions of the array of pixels according to image data.

4. A display according to claim 1 wherein the controller comprises a computer equipped with a display adapter.

5. A display comprising:

a light source comprising a two-dimensional array of light emitting elements each having a controllable light output, each of the light emitting elements corresponding to a location in an image specified by image data;

a control connected to control light output by each of the light emitting elements according to an intensity specified for the location by the image data; and

,

a spatial light modulator comprising a plurality of controllable elements located to modulate light from the light source,

wherein each of the controllable elements is illuminated by light output from a plurality of the light emitting elements corresponding to a respective plurality of locations in the image.

6. A display comprising:

a light source comprising a two-dimensional array of light emitting elements each having a controllable light output;

a spatial light modulator comprising a plurality of controllable elements located to modulate light from the light source; and

,

a controller for detecting a failure of one of the light emitting elements, and, in response to detecting a failed light emitting element, increasing the light output of neighboring ones of the light emitting elements and adjusting transmissivities ones of the controllable elements of the spatial light modulator upon which light from the neighboring ones of the light emitting elements is incident to compensate for the failed light emitting element.

7. A display comprising:

a light source comprising a two-dimensional array of light emitting elements each having a controllable light output, each of the light emitting elements corresponding to a location in an image specified by image data;

a spatial light modulator comprising a plurality of controllable elements located to modulate light from the light source; and

,

a controller for detecting a failure of one of the light emitting elements, and, in response to detecting a failed light emitting element, increasing the light outputs of neighboring ones of the light emitting elements by amounts based at least in part on the image data for the location corresponding to the failed light emitting element.

8. A display comprising:

a light source comprising a two-dimensional array of light emitting elements each having a controllable light output;

a spatial light modulator comprising a plurality of controllable elements located to modulate light from the light source; and

,

light barriers disposed between adjacent ones of the light emitting elements.