High dynamic contrast display system having multiple segmented backlight
First Claim
1. A display system comprising:
- a spatial light modulator for displaying an output color image formed from input image color data, the spatial light modulator substantially comprising a subpixel repeating group including a first subpixel configured to transmit a light having a first primary color, a second subpixel configured to transmit a light having a second primary color, a third subpixel configured to transmit a light having a third primary color, and a clear subpixel configured to selectively transmit a light substantially having one of the first to third primary colors, the first to third primary colors being different from each other;
a plurality of individually addressable colored light emitters disposed as a backlight to provide light for forming the output color image on the spatial light modulator, each light emitter configured to produce light substantially having one of the first to third primary colors; and
a controller circuitry for controlling light from the plurality of individually addressable colored light emitters, the controller circuitry configured to use the input image color data to determine a value for each of the individually addressable colored light emitters such that an output image color in one of the subpixels of the spatial light modulator depends on the color of the light from the light emitters,wherein the controller circuitry is configured to control the spatial light modulator and the light emitters such that the clear subpixel selectively transmits the light having one of the first to third primary colors as desired.
2 Assignments
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Accused Products
Abstract
In one embodiment, a display system includes a subpixelated display panel and a backlight array of individually controllable multi-color light emitters. When the display panel comprises a multi-primary subpixel arrangement having a white (clear) subpixel, the backlight control techniques allows the white subpixel to function as a saturated primary display color. In another embodiment, the display system may calculate a set of virtual primaries for a given image and process the image using a novel field sequential control employing the virtual primaries. In another embodiment, a display system comprises a segmented backlight comprising: a plurality of N+M light guides, said light guides forming a N×M intersections; a plurality of N+M individually addressable light emitter units, each of said N+M light emitter unit being associated with and optically connected to one of said N+M light guide respectively.
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Citations
31 Claims
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1. A display system comprising:
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a spatial light modulator for displaying an output color image formed from input image color data, the spatial light modulator substantially comprising a subpixel repeating group including a first subpixel configured to transmit a light having a first primary color, a second subpixel configured to transmit a light having a second primary color, a third subpixel configured to transmit a light having a third primary color, and a clear subpixel configured to selectively transmit a light substantially having one of the first to third primary colors, the first to third primary colors being different from each other; a plurality of individually addressable colored light emitters disposed as a backlight to provide light for forming the output color image on the spatial light modulator, each light emitter configured to produce light substantially having one of the first to third primary colors; and a controller circuitry for controlling light from the plurality of individually addressable colored light emitters, the controller circuitry configured to use the input image color data to determine a value for each of the individually addressable colored light emitters such that an output image color in one of the subpixels of the spatial light modulator depends on the color of the light from the light emitters, wherein the controller circuitry is configured to control the spatial light modulator and the light emitters such that the clear subpixel selectively transmits the light having one of the first to third primary colors as desired. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A display system comprising:
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a multi-primary spatial light modulator for displaying an output color image formed from an input signal comprising a frame of color input values, the frame having a first image resolution, the spatial light modulator substantially comprising a subpixel repeating group including a first subpixel configured to transmit a light having a first primary color, a second subpixel configured to transmit a light having a second primary color, a third subpixel configured to transmit a light having a third primary color, and a clear subpixel configured to selectively transmit a light substantially having one of the first to third primary colors, the first to third primary colors being different from each other; a plurality of individually addressable colored light emitters disposed as a backlight to provide light for forming the output color image on the spatial light modulator, each light emitter configured to produce light colors substantially having one of the first to third primary colors; a circuitry for carrying out a first gamut mapping operation for converting each color input value to a first multi-primary color signal in the color space of the plurality of individually addressable colored light emitters, the first gamut mapping operation producing a frame of converted color values; a controller circuitry for filtering the frame of converted color values to produce a frame of filtered color values having a second, lower resolution than the frame of color input values, the individually addressable colored light emitters displaying the frame of filtered color values; an interpolator for carrying out an interpolation operation for calculating brightness values and color values from the frame of filtered color values at each location of the frame of input color values; a circuitry for carrying out a second gamut mapping operation for converting each color input value to a second multi-primary color signal in the color space of the spatial light modulator using the brightness values and color values calculated by the interpolation means; and a subpixel renderer for carrying out a subpixel rendering operation for filtering the second multi-primary color signal for display on the spatial light modulator at the same time as the individually addressable colored light emitters display the frame of filtered color values. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A display system comprising:
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a spatial light modulator for displaying an output color image formed from an input signal comprising a set of color input values, the spatial light modulator substantially comprising a set of individually controllable transmissive elements including a first transmissive element configured to transmit a light having a first primary color, a second transmissive element configured to transmit a light having a second primary color, a third transmissive element configured to transmit a light having a third primary color, and a clear transmissive element configured to selectively transmit a light substantially having one of the first to third primary colors as desired, the first to third primary colors being different from each other; a plurality of individually addressable colored light emitters disposed as a backlight to provide light for forming a color image on the spatial light modulator, each light emitter configured to produce light substantially having one of the first to third primary colors; for a plurality of regions, said regions comprising a set of point spread functions of a set of said light emitter, circuitry for carrying out a first mapping operation for selecting a set of virtual primaries that bound each color input value within each said region, said virtual primaries comprising a plurality of intensities of said plurality of said light emitters within said set of point spread functions; field sequential control circuitry for controlling the duration and illumination of said virtual primaries over a set of fields comprising an intermediate color signal formed by said light emitters within each said region to produce an intermediate color image onto said spatial light modulator; and a circuitry for controlling said set of transmissive elements within each said region to modulate said intermediate color image to produce said output color image. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A display system comprising:
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a backlight outputting light in accordance with a first control signal, said backlight comprising; a plurality of N×
M light guides, wherein N light guides are disposed in a first direction and M light guides are disposed a second direction, said light guides overlapping and forming an N×
M set of optically communicating intersections;a plurality of N×
M individually addressable light emitter units, each of said N×
M light emitter units being a point light source associated with and optically connected to one of said N×
M light guides respectively, each light emitter unit capable of producing broad spectrum light in one of a plurality of colors;a spatial light modulator for displaying an output color image, said spatial light modulator receiving light from said backlight and modulating said light in accordance to a second control signal and comprising a subpixel repeating group including a first subpixel configured to transmit a light having a first primary color, a second subpixel configured to transmit a light having a second primary color, a third subpixel configured to transmit a light having a third primary color, and a clear subpixel configured to selectively transmit a light substantially having one of the first to third primary colors, the first to third primary colors being different from each other; and a controller circuitry for providing said first signal and said second signal, said controller circuitry configured for receiving input color image data and determining said first and said second control signals and outputting said first signal to said plurality of individually addressable light emitter units and outputting said second control signal to said spatial light modulator such that the combination of said light from said backlight and modulated by said spatial light modulator produces an output image based upon said input color image data, wherein each of said N×
M light emitter units is configured to produce light substantially having one of the first to third primary colors, andwherein the controller circuitry is configured to control the spatial light modulator and the light emitter units such that the clear subpixel selectively transmits a light having one of the primary colors of the color subpixels as desired. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification