Patent
Use of shutter to control the illumination period in a ferroelectric liquid crystal-based spatial light modulator display device
Reads0
Chats0
TLDR
In this paper, the authors describe a display device consisting of a light source, a reflective spatial light modulator, a light output, a beam splitter, and a shutter.Abstract:
A ferroelectric liquid crystal-based display device comprising a light source, a reflective spatial light modulator, a light output, a beam splitter, and a shutter. The beam splitter is located and aligned relative to the light source, the light output, and the spatial light modulator such that light generated by the light source is reflected or transmitted towards the spatial light modulator, and then light reflected by the spatial light modulator is reflected or transmitted towards the light output. The shutter has both and OPEN and a CLOSED state, and may include ferroelectric liquid crystal material. The shutter may be located and aligned relative to the lights source and the beam splitter such that when OPEN it transmits the light generated by the light source towards the beam splitter, and when CLOSED it prevents transmission of the light generated by the light source towards the beam splitter. Alternatively, the shutter may be located and aligned relative to the light output and the beam splitter such that when OPEN it transmits the light reflected by the spatial light modulator towards the light output, and when CLOSED it prevents transmission of the light reflected by the spatial light modulator towards the light output. A color separator and a first, second and third reflective spatial light modulators may be used in place of the above-described spatial light modulator. The color separator is located and aligned such that a first, second, and third wavelength band from the light generated by the light source, after being transmitted or reflected by the beam splitter, is transmitted or reflected towards the first, second, and third reflective spatial light modulators, respectively. Each of the first, second, and third reflective spatial light modulators include ferroelectric liquid crystal material.read more
Citations
More filters
Patent
Code symbol reading system
Anatoly Kotlarsky,Xiaoxun Zhu,Mikhail Veksland,Ka Man Au,Patrick Giordano,Weizhen Yan,Jie Ren,Taylor Smith,Michael V. Miraglia,C. Harry Knowles,Sudhin Mandal,Shawn De Foney,Christopher Allen,David M. Wilz +13 more
TL;DR: In this paper, an optical code symbol reading system is described, which includes a housing having a light transmission aperture, and at least one sound port formed in the housing, for coupling the sonic energy produced from the electro-acoustic transducer, to the at least sound wave port formed the housing.
Patent
Planar laser illumination and imaging (PLIIM) system employing wavefront control methods for reducing the power of speckle-pattern noise digital images acquired by said system
TL;DR: In this paper, a planar laser illumination and imaging (PLIIM) based system employing wavefront control methods for reducing the power of speckle-pattern noise within digital images acquired by the system.
Patent
Digital image capture and processing system employing an image formation and detection system having an area-type image detection array supporting single snap-shot and periodic snap-shot modes of image acquisition during object illumination and imaging operations
Anatoly Kotlarsky,Xiaoxun Zhu,Michael Veksland,Ka Man Au,Patrick Giordano,Weizhen Yan,Jie Ren,Taylor Smith,Michael V. Miraglia,C. Harry Knowles,Sudhin Mandal,Shawn De Foney,Christopher Allen,David M. Wilz +13 more
TL;DR: In this paper, a digital image capture and processing system including a housing having an imaging window, and an image formation and detection subsystem, disposed in the housing, having an area-type image detection array supporting a single snapshot mode of image acquisition and a periodic snap-shot mode during object illumination and imaging operations.
Patent
Method of speckle-noise pattern reduction and apparatus therefor based on reducing the spatial-coherence of the planar laser illumination beam before it illuminates the target object by applying spatial intensity modulation techniques during the transmission of the PLIB towards the target
TL;DR: A planar laser illumination and imaging (PLLIM) based camera system capable of producing digital images with reduced levels of speckle-pattern noise is presented in this article. But the system is not suitable for high-speed imaging.
Patent
Planar laser illumination and imaging (pliim) systems with integrated despeckling mechanisms provided therein
Constantine J. Tsikos,C. Harry Knowles,Xiaoxun Zhu,Michael Schnee,Ka Man Au,Allan Wirth,Timothy Good,Andrew J. Jankevics,Sankar Ghosh,Charles A. Naylor,Thomas Amundsen,Robert E. Blake,William Svedas,Shawn Defoney,Edward Skypala,Pirooz Vatan,Russell Joseph Dobbs,George Kolis,Mark Schmidt,Jeffery Yorsz,Patrick A. Giordano,Stephen J. Colavito,David M. Wilz,Barry E. Schwartz,Steven Y. Kim,Dale Fisher,Jon Van Tassell +26 more
TL;DR: In this paper, a hand-supportable planar laser illumination and imaging (PLIIM) based device with a light transmission aperture is presented, where a linear image formation and detection (IFD) module is mounted within the housing, and a linear array of image detection elements and also image formation optics with a field of view (FOV).
References
More filters
Patent
Light writing type projection display using polymer-dispersed liquid crystal and liquid crystal television set as image light source
TL;DR: A light writing type projection display for inputting two-dimensional information such as images or data patterns into a spatial light modulator, and displaying the information on a screen by using a display light beam was proposed in this article.
Patent
Split image exposure method
TL;DR: In this paper, the occupancy ratio of image data representing each split image is varied in double-exposed or fourfold-exposure areas, and the density of each pixel of the liquid crystal panel is controlled in accordance with this occupancy ratio.
Patent
Liquid crystal projector and method of projecting image
TL;DR: In this paper, a liquid crystal projector is provided with a timing control device for outputting a predetermined timing signal synchronous with a horizontal scanning period of the video data; a projected light source for emitting a projection light; a color separation device, coupled to the timing control devices, for separating the projection light into R, G and B components to output them in a time divisional manner on the basis of the timing signal.