RGB illuminator with calibration via single detector servo
First Claim
1. A display system comprising:
- a spatial light modulator divided into an array of individually controllable pixels;
a separate input-driven illumination device selected from a group of similar illumination devices which are each adapted to receive a variable input and configured to direct light of variable intensity onto the modulator, depending on said input; and
an arrangement adapted for connection with the selected illumination device for providing to the selected illumination device a specific input for a desired intensity level of said light, said specific input being provided from predetermined calibration information that is particular to the selected illumination device, said arrangement including a memory device for storing said calibration information.
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Accused Products
Abstract
A display system includes a light modulator divided into an array of individually controllable pixels and an input-driven illumination device. The illumination device is adapted to receive a variable input and is configured to direct light of variable intensity onto the modulator, depending on the input. The display system further includes a calibrating arrangement for establishing the input to the illumination device to produce a desired intensity level of light. The calibrating arrangement includes a light sensing mechanism, which senses the light from the illumination device while the illumination device is driven by an initial input. The calibration arrangement is configured to determine a comparison between the sensed light and a value representative of the desired-intensity level. The calibration arrangement further includes a control arrangement responsive to the comparison for varying the input so as to provide light of the desired intensity level.
139 Citations
28 Claims
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1. A display system comprising:
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a spatial light modulator divided into an array of individually controllable pixels;
a separate input-driven illumination device selected from a group of similar illumination devices which are each adapted to receive a variable input and configured to direct light of variable intensity onto the modulator, depending on said input; and
an arrangement adapted for connection with the selected illumination device for providing to the selected illumination device a specific input for a desired intensity level of said light, said specific input being provided from predetermined calibration information that is particular to the selected illumination device, said arrangement including a memory device for storing said calibration information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A display system comprising:
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a light modulator divided into an array of individually controllable pixels;
a separate input-driven illumination device having one or more light sources which are adapted to receive variable inputs and which are configured to direct light of variable intensities onto the modulator, depending on said inputs; and
a calibrating arrangement for establishing the inputs for a desired intensity level of said light from each light source, the arrangement including a light sensing mechanism which senses said light from one light source at a time while each light source is driven by an initial input, the calibration arrangement being configured to determine a comparison between the sensed light and a value representative of the desired intensity level of light from the light source, the calibration arrangement further including means responsive to the comparisons for varying the inputs so as to provide light of said desired intensity level from each light source. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 23)
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10. A display system comprising:
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a light modulator;
a separate input-driven illumination device having a plurality of light sources which are adapted to receive variable inputs and which are configured to direct light of variable intensities onto the modulator, depending on said inputs; and
a calibrating arrangement for establishing the inputs for a desired intensity level of said light from each light source, the arrangement including a light sensing mechanism forming part of the light modulator which senses said light from one light source at a time while each light source is driven by an initial input, the calibration arrangement being configured to determine a comparison between the sensed light and a value representative of the desired intensity level of light from the light source, the calibration arrangement further including means responsive to the comparisons for varying the inputs so as to provide light of said desired intensity level from each light source.
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21. A method of operating a display system comprising the steps of:
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a) providing an input-driven illumination device having one or more light sources which are adapted to receive variable inputs and which are configured to direct light of variable intensities onto a light modulator depending on said inputs;
b) sensing said light from one light source at a time while each light source is driven by an initial input;
c) comparing the sensed light to a value representative of the desired intensity;
d) establishing the inputs for a desired intensity level of said light from each light source in response to the comparisons; and
e) directing the light of said desired intensity level from each light source onto said light modulator.
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24. A display system, comprising:
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a light modulator;
a separate illumination device including three light sources, each of the three light sources providing light that is substantially in a different color band than two others of the three light sources, each of the three light sources providing an output light intensity related to an input corresponding to that light source; and
a calibrating arrangement that establishes the inputs to the three light sources, the arrangement including a light sensing arrangement that separately senses the output light intensity from each of the three differently-colored light sources and based thereon separately adjusts the input to each of the three differently-colored light sources to achieve a desired output light intensity from each differently-colored light source to achieve a desired color balance in the combination of the light from each of the three differently-colored light sources.
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25. A display system, comprising:
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a spatial light modulator divided into an array of individually controllable pixels;
a separate light source that provides light to the modulator, the intensity of the light provided being a function of an input signal provided to the light source, wherein said light source has been characterized prior to installation in the display system to determine the magnitude of the input signal that is required to provide a predetermined light intensity, the determined magnitude having been stored as calibration information specific to said particular light source in a memory device associated with the light source;
wherein the calibration information is utilized during operation of the display device to achieve a desired light intensity. - View Dependent Claims (26, 27, 28)
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Specification