Equipment, systems and methods for control of color in projection displays
First Claim
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1. A projection system having three color channels, one for each primary color, comprising:
- a plurality of spatial light modulator (SLM) devices, one for each color channel, each SLM capable of modulating light on a per pixel basis;
a main illumination source capable of producing light;
a plurality of secondary illumination sources each capable of producing light;
a plurality of optical power controlling devices for controlling the flux of light produced by the secondary illumination sources;
an integrating device capable of integrating the light produced by the main illumination source and the secondary illumination sources;
a color separating and re-combining device capable of receiving the integrated light from the integrating device, separating the light into the color channels, directing the light in each color channel to the corresponding SLM, and re-combining the modulated light from each SLM to form an image; and
a projection lens capable of receiving the image from the color separating and re-combining device and projecting the image, wherein the addition of light from the secondary illumination sources acts to control color variations in the image.
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Abstract
The present invention discloses systems, equipment and methods that allow the improved adjustment of color in projection displays. Equipment, systems and methods are disclosed for matching the color balance of each display including the color of the display primaries and further equipment, systems and methods are disclosed for the correction of a field dependant color variation across the field of an SLM based projector.
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Citations
38 Claims
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1. A projection system having three color channels, one for each primary color, comprising:
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a plurality of spatial light modulator (SLM) devices, one for each color channel, each SLM capable of modulating light on a per pixel basis;
a main illumination source capable of producing light;
a plurality of secondary illumination sources each capable of producing light;
a plurality of optical power controlling devices for controlling the flux of light produced by the secondary illumination sources;
an integrating device capable of integrating the light produced by the main illumination source and the secondary illumination sources;
a color separating and re-combining device capable of receiving the integrated light from the integrating device, separating the light into the color channels, directing the light in each color channel to the corresponding SLM, and re-combining the modulated light from each SLM to form an image; and
a projection lens capable of receiving the image from the color separating and re-combining device and projecting the image, wherein the addition of light from the secondary illumination sources acts to control color variations in the image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. In a projection system capable of producing a color image, the projection system having a spatial light modulator (SLM) for each of three color channels, one for each primary color, a method for adjusting the color of the image, the method comprising:
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providing light having a spectral energy distribution from at least one illumination source to a separating and re-combining device;
controlling the spectral energy distribution of the light entering into the color separating and re-combining device without reducing the overall brightness of the image;
modulating the controlled light with at least one spatial light modulator (SLM) to form an image; and
projecting the image. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 38)
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28. A projection system having three color channels, one for each primary color, comprising:
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a plurality of SLM devices, one for each color channel;
an illumination source capable of producing light;
a first adjustable bandpass filter capable of controlling the spectral energy distribution of light in at least one color channel;
an integrating device capable of integrating the light produced by the illumination source as filtered by the first adjustable bandpass filter;
a color separating and re-combining device capable of receiving the integrated light from the integrating device, separating the light into the color channels, directing the light in each color channel to the corresponding SLM, and re-combining the modulated light from each SLM to form an image; and
a projection lens capable of receiving the image from the color separating and re-combining device projecting the image, wherein adjustment of the first adjustable bandpass filter acts to control color variations in the image. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A projection system having three color channels, one for each primary color, comprising:
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a plurality of SLM devices, one for each color channel, each SLM capable of modulating light;
three illumination sources capable of producing light, wherein there is one illumination source for each color channel;
a plurality of optical power controlling devices for controlling the flux of light produced by the illumination sources;
an integrating device capable of integrating the light produced by the illumination sources;
a color separating and re-combining device capable of receiving the integrated light, having a spectral energy distribution, from the integrating device, separating the light into the color channels, directing the light in each color channel to the corresponding SLM, and re-combining the modulated light from each SLM, to form an image; and
a projection lens capable of receiving the image from the color separating and re-combining device and projecting the image, wherein the spectral energy distribution of the light entering into the separating and re-combining device is controlled to control color variation of the image. - View Dependent Claims (35, 36, 37)
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Specification