Patent
Bandpass filter to reduce thermal impact of dichroic light shift
TLDR
A color splitting prism assembly (100) comprised of three prisms is described in this paper, where the first primary color component is directed to a first modulator (118), the remaining portions of the white light beam enters a second prism (108) and strike a second dichroic filter at the interface between (124) the second and third prisms.Abstract:
A color splitting prism assembly (100) comprised of three prisms. Each a dichroic filter at an interface (112) between a first and second of the three prisms reflects a first primary color component of a white light beam passing through the prism assembly. The first primary color component is directed to a first modulator (118). The remaining portions of the white light beam enter a second prism (108) and strike a second dichroic filter at the interface between (124) the second and third prisms. The second dichroic filter separates a second primary color component from the white light beam leaving a third primary color component to travel through the third prism (110) to a third modulator. The second primary color component of the white light beam is directed to a second modulator (128). Light modulated by the first and third modulators travels through the prisms at a slightly different angle than the unmodulated light and therefore reacts differently upon striking the first dichroic filter for the second time. Portions of the light modulated by the first and third modulator travel toward the second modulator (128). An additional filter on or near the exit face (126) of the second prism (108) prevents light in the first and third primary color components from reaching the second modulator (128) and heating the second modulator (128). The light rejected by the additional filter is dispersed by ground glass surfaces of the color splitting prism assembly.read more
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Patent
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Patent
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Patent
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Clarence Chui,Mark W. Miles +1 more
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Patent
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Process for modifying offset voltage characteristics of an interferometric modulator
TL;DR: In this paper, a process for modifying the processing parameters to shift the non-zero offset voltage closer to zero has been developed, which may have improved performance and/or simpler drive schemes.
References
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Patent
Projection-type display apparatus
TL;DR: In this article, a projection-type video display with three liquid crystal light valves is presented, each having a plurality of pixels arranged in the matrix and identical shift registers in such a way that pixels of one scanning line are driven selectively and sequentially from the same horizontal direction according to a given set of video signals.
Patent
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Patent
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Patent
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