Sequential projection color display using multiple imaging panels
First Claim
Patent Images
1. A color projection display device for displaying a temporally-integrated color image comprising first and second sequences of temporally-integrateable primary color image components, the device comprising:
- a first SLM panel comprising a first array of pixel elements;
a second SLM panel comprising a second array of pixel elements;
first driving circuitry which receives a first input signal representing said first sequence of temporally-integrateable primary color image components and selectively activates said first array of pixel elements to produce a first sequence of reflective patterns corresponding to said first sequence of temporally-integrateable primary color image components, each pattern in said first sequence of reflective patterns adapted to receive p-polarized incident light and to reflect corresponding s-polarized light;
second driving circuitry which receives a second input signal representing said second sequence of temporally-integrateable primary color image components and selectively activates said second array of pixel elements to produce a second sequence of reflective patterns corresponding to said second sequence of temporally-integrateable primary color image components, each pattern in said second sequence of reflective patterns adapted to receive s-polarized incident light and-to reflect corresponding p-polarized light;
an illumination unit which generates a non-polarized, substantially white, light beam;
a first PBS which separates the non-polarized light beam into a substantially white p-polarized light beam and a substantially white s-polarized light beam;
a first color switching mechanism which sequentially interposes each of a first set of primary color filter segments in the path of said substantially white p-polarized light beam to produce a sequence of p-polarized colored light beams whose colors correspond to the colors of said first sequence of temporally-integrateable primary color image components;
a second PBS which transmits said sequence of p-polarized colored light beams onto said first SLM panel receives a sequence of patterned s-polarized colored light beams reflected from said first SLM panel, each patterned s-polarized colored light beam carrying one primary color image component in said first sequence of temporally-integrateable primary color image components, and deflects said sequence of patterned s-polarized colored light beams;
a second color switching mechanism which sequentially interposes each of a second set of primary color filter segments in the path of said substantially white s-polarized light beam to produce a sequence of s-polarized colored light beams whose colors correspond to the colors of said second sequence of temporally-integrateable primary color image components;
a third PBS which deflects said sequence of s-polarized colored light beams onto said second SLM panel, receives a sequence of patterned p-polarized colored light beams reflected from said second SLM panel, each patterned p-polarized colored light beam carrying one primary color image component in said second sequence of temporally-integrateable primary color image components, and transmits said sequence of patterned p-polarized colored light beams; and
a fourth PBS which transmits the sequence of patterned p-polarized colored light beams transmitted by said third PBS and deflects the sequence of patterned s-polarized colored light beams deflected by said second PBS, thereby to produce a combined output beam carrying both said first sequence and said second sequence of temporally-integrateable primary color image components.
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Abstract
A color projection display device may include SLMs or other panels. One embodiment includes a device for displaying a color image including first and second sequences of temporally-integrateable primary color image components, the device also includes first (209) ans second (206) SLM panels (604, 606), first and second driving circuitry, and first through fourth polarizing beam spitters.
55 Citations
31 Claims
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1. A color projection display device for displaying a temporally-integrated color image comprising first and second sequences of temporally-integrateable primary color image components, the device comprising:
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a first SLM panel comprising a first array of pixel elements;
a second SLM panel comprising a second array of pixel elements;
first driving circuitry which receives a first input signal representing said first sequence of temporally-integrateable primary color image components and selectively activates said first array of pixel elements to produce a first sequence of reflective patterns corresponding to said first sequence of temporally-integrateable primary color image components, each pattern in said first sequence of reflective patterns adapted to receive p-polarized incident light and to reflect corresponding s-polarized light;
second driving circuitry which receives a second input signal representing said second sequence of temporally-integrateable primary color image components and selectively activates said second array of pixel elements to produce a second sequence of reflective patterns corresponding to said second sequence of temporally-integrateable primary color image components, each pattern in said second sequence of reflective patterns adapted to receive s-polarized incident light and-to reflect corresponding p-polarized light;
an illumination unit which generates a non-polarized, substantially white, light beam;
a first PBS which separates the non-polarized light beam into a substantially white p-polarized light beam and a substantially white s-polarized light beam;
a first color switching mechanism which sequentially interposes each of a first set of primary color filter segments in the path of said substantially white p-polarized light beam to produce a sequence of p-polarized colored light beams whose colors correspond to the colors of said first sequence of temporally-integrateable primary color image components;
a second PBS which transmits said sequence of p-polarized colored light beams onto said first SLM panel receives a sequence of patterned s-polarized colored light beams reflected from said first SLM panel, each patterned s-polarized colored light beam carrying one primary color image component in said first sequence of temporally-integrateable primary color image components, and deflects said sequence of patterned s-polarized colored light beams;
a second color switching mechanism which sequentially interposes each of a second set of primary color filter segments in the path of said substantially white s-polarized light beam to produce a sequence of s-polarized colored light beams whose colors correspond to the colors of said second sequence of temporally-integrateable primary color image components;
a third PBS which deflects said sequence of s-polarized colored light beams onto said second SLM panel, receives a sequence of patterned p-polarized colored light beams reflected from said second SLM panel, each patterned p-polarized colored light beam carrying one primary color image component in said second sequence of temporally-integrateable primary color image components, and transmits said sequence of patterned p-polarized colored light beams; and
a fourth PBS which transmits the sequence of patterned p-polarized colored light beams transmitted by said third PBS and deflects the sequence of patterned s-polarized colored light beams deflected by said second PBS, thereby to produce a combined output beam carrying both said first sequence and said second sequence of temporally-integrateable primary color image components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 15, 16, 17, 18, 19, 20)
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8. A color projection display device for displaying a temporally-integrated color image comprising first and second sequences of temporally-integrateable primary color image components, the device comprising:
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a first SLM panel comprising a first array of pixel elements;
a second SLM panel comprising a second array of pixel elements;
first driving circuitry which receives a first input signal representing said first sequence of temporally-integrateable primary color image components and selectively activates said first array of pixel elements to produce a first sequence of reflective patterns corresponding to said first sequence of temporally-integrateable primary color image components, each pattern in said first sequence of reflective patterns adapted to reflect incident light;
second driving circuitry which receives a second input signal representing said second sequence of temporally-integrateable primary color image components and selectively activates said second array of pixel elements to produce a second sequence of reflective patterns corresponding to said second sequence of temporally-integrateable primary color image components, each pattern in said second sequence of reflective patterns adapted to reflect incident light;
an illumination unit which generates a non-polarized, substantially white, light beam;
a first PBS which separates the non-polarized light beam into a substantially white p-polarized light beam and a substantially white s-polarized light beam;
a first color switching mechanism which sequentially interposes each of a first set of primary color filter segments in the path of said substantially white p-polarized light beam to produce a sequence of p-polarized colored light beams whose colors correspond to the colors of said first sequence of temporally-integrateable primary color image components;
a first TIR prism which transmits said sequence of p-polarized colored light beams onto said first SLM panel, receives a sequence of patterned p-polarized colored light beams reflected from said first SLM panel, each patterned p-polarized colored light beam caring one primary color image component in said first sequence of temporally-integrateable primary color image components, and deflects said sequence of patterned p-polarized colored light beams;
a second color switching mechanism which sequentially interposes each of a second set of primary color filter segments in the path of said substantially white s-polarized light beam to produce a sequence of s-polarized colored light beams whose colors correspond to the colors of said second sequence of temporally-integrateable primary color image components;
a second TIR prism which deflects said sequence of s-polarized colored light beams onto said second SLM panel, receives a sequence of patterned s-polarized colored light beams reflected from said second SLM panel each patterned s-polarized colored light beam carrying one primary color image component in said second sequence of temporally-integrateable primary color image components, and transmits said sequence of patterned s-polarized colored light beams; and
a second PBS which transmits the sequence of patterned p-polarized colored light beams deflected by said first TIR prism and deflects the sequence of patterned s-polarized colored light beams transmitted by said second TIR prism, thereby to produce a combined output beam carrying both said first sequence and said second sequence of temporally-integrateable primary color image components. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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21. A color projection display device for displaying a temporally-integrated color image comprising first and second sequences of temporally-integrateable primary color image components, the device comprising:
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a first SLM panel comprising a first array of pixel elements;
a second SLM panel comprising a second an-ay of pixel elements;
first driving circuitry which receives a first input signal representing said first sequence of temporally-integrateable primary color image components and selectively activates said first array of pixel elements to produce a first sequence of reflective patters corresponding to said first sequence of temporally-integrateable primary color image components;
second drilling circuitry which receives a second input signal representing said second sequence of temporally-integrateable primary color image components and selectively activates said second array of pixel elements to produce a second sequence of reflective patterns corresponding to said second sequence of temporally-integrateable primary color image components;
an illumination unit which generates a substantially white light beam;
a color switching mechanism which sequentially interposes each of at least three different color filter segments in the path of said substantially white light beam, each color filter segment having a different wavelength transmission spectrum, to produce a sequence of at least three, respective, color filtered light beams; and
a beam-splitting prism which separates each color filtered light beam in said sequence of at least three color filtered light beams into a first sub-spectrum beam whose color corresponds to the color of one of the primary color image components in said first sequence of temporally-integrateable primary color image components and a second sub-spec beam whose color corresponds to the color of one of the primary color image components in said second sequence of temporally-integrateable primary color image components, directs each said first sub-spectrum beam onto said first SLM panel directs each said second sub-spectrum beam onto said second SLM panel receives a first sequence of patterned colored light beams reflected from said first SLM panel each patterned colored light beam in said first sequence of patterned colored light beams carrying one primary color image component in said first sequence of temporally-integrateable primary color image components, receives a second sequence of patterned colored light beams reflected from said second SLM panel each patterned colored light beam in said second sequence of patterned colored light beams carrying One primary color image component in said second sequence of temporally-integrateable primary color image components, and directs both said first sequence ad said second sequence of patterned colored light beams in an output direction, thereby to produce a combined output beam carrying both said first sequence and said second sequence of temporally-integrateable p color image components. - View Dependent Claims (22, 23, 24, 25, 26, 27, 29, 30, 31)
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28. A device according to any of clams 21-27 wherein each of said first and second SLM panels comprises a DMD™
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Specification