Berman Arthur L. (San Jose CA) Lewis Thomas M. (Santa Cruz CA)
출원인 / 주소
Kaiser Aerospace & Electronics Corporation (Oakland CA 02)
인용정보
피인용 횟수 :
87인용 특허 :
2
초록▼
A head-up display (HUD)/head-down display (HDD) system capable of projecting multi-color images employs cholesteric liquid crystal elements, two-state liquid crystal devices, an image source, a beam splitter, and a combiner to, in sequence, generate HUD and HDD images. An LCD and cholesteric liquid
A head-up display (HUD)/head-down display (HDD) system capable of projecting multi-color images employs cholesteric liquid crystal elements, two-state liquid crystal devices, an image source, a beam splitter, and a combiner to, in sequence, generate HUD and HDD images. An LCD and cholesteric liquid crystal element operate together to selectively transmit or block portions of an image incident thereon. The switching frequency of the LCD-cholesteric liquid crystal element is above the flicker-fusion frequency, such that both the HUD and HDD displays appear to the observer to be simultaneously and continuously operating.
대표청구항▼
An apparatus for directing a plurality of images from an image source, which generates a first and a second image having a first and a second wavelength, along a first and a second optical path, comprising: means for converting incident radiation of the first wavelength to a first polarization; mean
An apparatus for directing a plurality of images from an image source, which generates a first and a second image having a first and a second wavelength, along a first and a second optical path, comprising: means for converting incident radiation of the first wavelength to a first polarization; means for converting incident radiation of the second wavelength to a second polarization; a beam splitter, disposed along the first and second optical paths, for transmitting a first portion of said converted incident radiation along said first optical path and reflecting a second portion of said converted radiation along said second optical path, said transmitted first portion has radiation of said first wavelength polarized in said first polarization and said second wavelength polarized in said second polarization, said reflected second portion has radiation of said first wavelength polarized in a third polarization, orthogonal to said first polarization, and said second wavelength polarized in a fourth polarization, orthogonal to said second polarization; a first shutter means, disposed along said first optical path and responsive to a first filter signal, for reflecting said first wavelength and passing said second wavelength of said transmitted first portion of said converted radiation; a second shutter means, disposed along said first optical path and responsive to a second filter signal, for reflecting said second wavelength and passing said first wavelength of said transmitted first portion; a third shutter means, disposed along said second optical path and responsive to a third filter signal, for reflecting said first wavelength and passing said second wavelength of said reflected second portion of said converted radiation; a fourth shutter means, disposed along said second optical path and responsive to a fourth filter signal, for reflecting said second wavelength and passing said first wavelength of said reflected second portion; and a timing device for providing said first, second, third and fourth filter signals to selectively pass desired images of said first and second wavelength along said first and second optical paths.
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이 특허에 인용된 특허 (2)
Albert Richard (Seymour CT), Liquid crystal light valve method and apparatus using right and left-handed twist cholesteric liquid crystal.
Weber, Michael F.; Ouderkirk, Andrew J.; Wheatley, John A.; Brodd, Jonathan, Head-up display with polarized light source and wide-angle p-polarization reflective polarizer.
Atkins, Robin, High dynamic range display using LED backlighting, stacked optical films, and LCD drive signals based on a low resolution light field simulation.
Atkins, Robin, High dynamic range display using LED backlighting, stacked optical films, and LCD drive signals based on a low resolution light field simulation.
Fergason James L. (92 Adam Way Atherton CA 94025), Optical system for a head mounted display using a retro-reflector and method of displaying an image.
Shields, Jerome; Hadlaw, Marek; Erinjippurath, Gopal, Systems and methods for accurately representing high contrast imagery on high dynamic range display systems.
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