Patent
Light collimator for liquid crystal displays
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TLDR
In this article, a collimator is provided to collimate light from a lambertian light source in which light from the fluorescent lamp is reflected towards an exit slit and the light which leaves the slit at 180 degrees and is collimated in one direction to +/−1/2 degree.Abstract:
A collimator is provided to collimate light from a lambertian light source in which light from a fluorescent lamp is reflected towards an exit slit and in which light which leaves the slit at 180 degrees and is collimated in one direction to +/−1/2 degree. The collimator is utilized in one application to maximize the diffraction efficiency of a diffractive color separator microlens array to increase the brightness of a color liquid crystal display and to increase color saturation. In order to provide collimation, the light exiting the exit slit is collimated by parabolic surfaces of an optical waveguide to provide a beam which has a collimation of +/−3 degrees in one direction. This light in one embodiment is spread out by a reflective array and is further collimated by a cylindrical lens array so that it exits a panel with the required +/−1/2 degree collimation.read more
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References
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Patent
Color separation microlens
George Gal,Bruce J. Herman +1 more
TL;DR: A color separation microlens as mentioned in this paper is a single micro-optical element made up of a color separation grating integrated with a refractive lens, which separates the spectrum into distinct color spots and focuses these spots to a common plane.
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Thin high efficiency illumination system for display devices
TL;DR: An illumination system for a display device includes an array of cylindrical lenslets for imaging an adjacent array of different color monochromatic emitting phosphor stripes onto the display device as discussed by the authors.
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Method for fabricating microlenses
TL;DR: In this paper, a microlens of any designed configuration is formed as a replica in a photoresist material, and then the replica is used to reproduce the replica directly in a substrate material.
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Structure for achieving a linear light source geometry
TL;DR: Improved linear illumination sources as mentioned in this paper utilize external, highly reflective enclosures containing one or more linear openings and thereby achieve improved source efficiency, output irradiance and/or output radiance.
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Flat panel display
George Gal,Bruce J. Herman +1 more
TL;DR: A flat panel display incorporates an array of color separation microlenses as mentioned in this paper, which disperses color by orders to distinct color spots and focuses these color spots to related liquid crystal sub-pixels located in a common plane.