Abstract:
The present invention provides an illumination system having a light source for emitting light and a reflector having a reflective surface for collecting and reflecting the light from the light source.
Abstract:
A spatial light modulator includes an upper optically transmissive substrate held above a lower substrate containing addressing circuitry. One or more electrostatically deflectable elements are suspended by hinges from the upper substrate. In operation, individual mirrors are selectively deflected and serve to spatially modulate light that is incident to, and then reflected back through, the upper substrate. Motion stops may be attached to the reflective deflectable elements so that the mirror does not snap to the bottom substrate. Instead, the motion stop rests against the upper substrate thus limiting the deflection angle of the reflective deflectable elements.
Abstract:
Methods and apparatus for selectively updating memory cells of a memory cell array are provided. The memory cells of each row of the memory cell array are provided with a plurality of wordlines. Memory cells of the row are activated and updated by separated wordlines. In an application of display systems using memory cell arrays for controlling the pixels of the display system and pulse-width-modulation (PWM) technique for displaying grayscales, the pixels can be modulated by different PWM waveforms. The perceived dynamic-false-contouring artifacts are reduced thereby. In another application, the provision of multiple wordlines enables precise measurements of voltages maintained by memory cells of the memory cell array.
Abstract:
A multicolor optical image-generating device comprised of an array of grating light valves (GLVs) organized to form light-modulating pixel units for spatially modulating incident rays of light. The pixel units are comprised of three subpixel components each including a plurality of elongated, equally spaced apart reflective grating elements arranged parallel to each other with their light-reflective surfaces also parallel to each other. Each subpixel component includes means for supporting the grating elements in relation to one another, and means for moving alternate elements relative to the other elements and between a first configuration wherein the component acts to reflect incident rays of light as a plane mirror, and a second configuration wherein the component diffracts the incident rays of light as they are reflected from the grating elements. The three subpixel components of each pixel unit are designed such that when red, green and blue light sources are trained on the array, colored light diffracted by particular subpixel components operating in the second configuration will be directed through a viewing aperture, and light simply reflected from particular subpixel components operating in the first configuration will not be directed through the viewing aperture.
Abstract:
Disclosed herein is a spatial light modulator having an array of pixels enclosed within a space between a light transmissive substrate and another substrate. The light transmissive substrate is spaced apart from the reflective mirror plates at a distance such that physical defects of the light transmissive substrate are out of focus of the projection system.
Abstract:
Methods and apparatus for selectively updating memory cells of a memory cell array are provided. The memory cells of each row of the memory cell array are provided with a plurality of wordlines. Memory cells of the row are activated and updated by separated wordlines. In an application of display systems using memory cell arrays for controlling the pixels of the display system and pulse-width-modulation (PWM) technique for displaying grayscales, the pixels can be modulated by different PWM waveforms. The perceived dynamic-false-contouring artifacts are reduced thereby. In another application, the provision of multiple wordlines enables precise measurements of voltages maintained by memory cells of the memory cell array.
Abstract:
Multiple pixel arrays are enclosed in one single package. The multiple pixel arrays can be disposed in the package with any desired geometric configurations.
Abstract:
A method and apparatus are disclosed for increasing contrast in micromirror-based image display devices. As a result the displayed image is a more faithful reproduction of the original and is more pleasing to human perception than is possible with a low contrast display. The method and apparatus comprise a micromirror design and a modulation scheme for driving micromirrors with a combination of analog and digital techniques to achieve partial and full micromirror deflection. The analog techniques permit the mirrors to be deflected to positions intermediate between the resting position and the position of maximum deflection. These intermediate deflections appear as intermediate light levels in an image. Compared to digital modulation, the analog techniques provide an increase in the number of light levels that can be displayed by a system that is limited by its incoming data rate and maximum micromirror speed.
Abstract:
The micromirror-based projection system of the present invention uses polarized illumination light in producing desired images on a display target. The display target has coated thereon a polarization film that absorbs most of the ambient light that would be incident onto the display target otherwise. Polarized illumination light is provided incident to the reflective surfaces of the spatial light modulator. The polarization direction of the illumination light can be associated with the rotation axes of the micromirrors and the polarization direction of the polarized film on the display target.
Abstract:
A method and apparatus are disclosed for increasing contrast in micromirror-based image display devices. As a result the displayed image is a more faithful reproduction of the original and is more pleasing to human perception than is possible with a low contrast display. The method and apparatus comprise a micromirror design and a modulation scheme for driving micromirrors with a combination of analog and digital techniques to achieve partial and full micromirror deflection. The analog techniques permit the mirrors to be deflected to positions intermediate between the resting position and the position of maximum deflection. These intermediate deflections appear as intermediate light levels in an image. Compared to digital modulation, the analog techniques provide an increase in the number of light levels that can be displayed by a system that is limited by its incoming data rate and maximum micromirror speed.