Abstract:
A spatial light modulator is disclosed, along with methods for making such a modulator that comprises an array of mirror devices each having at least a preferably at least a first electrode and a second electrode. The first electrode is designated for driving the mirror plate of the micromirror device to an ON state, and the second electrode is designated for driving the mirror plate to an OFF state. The two electrodes can be disposed on the same side of the mirror plate but on opposite sides of the rotation axis of the mirror plate for driving the mirror plate to rotate in opposite directions. Alternatively, the two electrodes can be disposed on the opposite sides of the mirror plate, but on the same side of the rotation axis of the mirror plate for driving the mirror plate to rotate in opposite directions. The ON state and OFF state of the mirror plate can be defined by stops. The stops may be formed on substrate(s), hinge structures holding the mirror plates of the micromirror device and/or a desired location within the micromirror device. Alternatively, the electrodes for the ON state and the OFF state can be used as stops, either individually or in combination, or in combination with other component(s), such as substrate(s) of the micromirror device. The OFF state angle and the ON state angle are preferably different.
Abstract:
A projection system for projection of a color image according to the invention, especially a front or rear projection TV according to the invention, comprises a light source for providing light to an array of micromirrors, especially an arc lamp; an array of micromirrors, each micromirror having a substantially four-sided shape; and a screen on which an image to be viewed is displayed. Light from the light source is incident on the array of micromirrors during operation and is directed as a rectangular image to the screen.The micromirrors are capable of movement between an OFF state and an ON state by pulse width modulation to achieve a gray scale image on the screen. Each micromirror corresponds to a pixel in a viewed image on the screen. The viewed image has four sides and there are no pixel sides in the viewed image that are parallel to any image sides.
Abstract:
The present invention provides a method and apparatus of converting a stream of pixel data (120) in space and time into a stream of bitplane data. In particular, the presnt invention converts the pixel data (120) stream according to a predetermined output fromat. The apparatus of the present invention receives the pixel data (123) in a "real-time' fashion, and dynamically performs predefined permutations so as to accomplish the predeined trnspose operation. Alternatively, the pixel data are stroed in a storage medium (126), and the apparatus of the present invention retrieves the pixel data and performs the predefined permutation to accomplish the predefined transpose operation. The methods and apparatus disclosed herein are especially useful for processing a high-speed stream of digital dat in a flow-through manner and suitable for inplementation in a hardware video pipeline. The control signal fanout and gate count of this invention are reduced compared to currently available similar techniques for converting pixel data into bitplane data.
Abstract:
A spatial light modulator is disclosed, along with a method for making such a modulator that comprises an array of micromirror devices. The center-to-center distance and the gap between adjacent micromirror devices are determined corresponding to the light source being used so as to optimize optical efficiency and performance quality. The micromirror device comprises a hinge support formed on a substrate and a hinge that is held by the hinge support. A mirror plate is connected to the hinge via a contact, and the distance between the mirror plate and the hinge is determined according to desired maximum rotation angle of the mirror plate, the optimum gap and pitch between the adjacent micromirrors. In a method of fabricating such spatial light modulator, one sacrificial layer is deposited on a substrate followed by forming the mirror plates, and another sacrificial layer is deposited on the mirror plates followed by forming the hinge supports. The two sacrificial layers are removed via the small gap between adjacent mirror devices with spontaneous vapor phase chemical etchant. Also disclosed is a projection system that comprises such a spatial light modulator, as well as a light source, condensing optics, wherein light from the light source is focused onto the array of micromirrors, projection optics for projecting light selectively reflected from the array of micromirrors onto a target, and a controller for selectively actuating the micromirrors in the array.
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 (110) 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 (110) 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:
A spatial light modulator is disclosed, along with a method for making such a modulator that comprises an array of micromirror devices. The center-to-center distance and the gap between adjacent micromirror devices are determined corresponding to the light source being used so as to optimize optical efficiency and performance quality. The micromirror device comprises a hinge support (218) formed on a substrate (210) and a hinge (22) that is held by the hinge support (218). A mirror plate (212) is connected to the hinge (222) via a contact (224), and the distance between the mirror plate (212) and the hinge (222) is determined according to desired maximum rotation angle of the mirror plate (212), the optimum gap and pitch between the adjacent micromirrors. In a method of fabricating such spatial light modulator, one sacrificial layer is deposited on a substrate (210) followed by forming the mirror plates (212), and another sacrificial layer is deposited on the mirror plates (212) followed by forming the hinge supports (218). The two sacrificial layers are removed via the small gap between adjacent mirror devices with spontaneous vapor phase chemical etchant. Also disclosed is a projection system that comprises such a spatial light modulator, as well as a light source, condensing optics, wherein light from the light source is focused onto the array of micromirrors, projection optics for projecting light selectively reflected from the array of micromirrors onto a target, and a controller for selectively actuating the micromirrors in the array.
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 method for processing microelectromechanical devices is disclosed herein. The method prevents the diffusion and interaction between sacrificial layers and structure layers of the microelectromechanical devices by providing selected barrier layers between consecutive sacrificial and structure layers.
Abstract:
A spatial light modulator is disclosed, along with a method for making such a modulator that comprises an array of micromirror devices. The center-to-center distance and the gap between adjacent micromirror devices are determined corresponding to the light source being used so as to optimize optical efficiency and performance quality. The micromirror device comprises a hinge support formed on a substrate and a hinge that is held by the hinge support. A mirror plate is connected to the hinge via a contact, and the distance between the mirror plate and the hinge is determined according to desired maximum rotation angle of the mirror plate, the optimum gap and pitch between the adjacent micromirrors.In a method of fabricating such spatial light modulator, one sacrificial layer is deposited on a substrate followed by forming the mirror plates, and another sacrificial layer is deposited on the mirror plates followed by forming the hinge supports. The two sacrificial layers are removed via the small gap between adjacent mirror devices with spontaneous vapor phase chemical etchant. Also disclosed is a projection system that comprises such a spatial light modulator, as well as a light source, condensing optics, wherein light from the light source is focused onto the array of micromirrors, projection optics for projecting light selectively reflected from the array of micromirrors onto a target, and a controller for selectively actuating the micromirrors in the array.
Abstract:
Data processing methods and apparatus used in digital display system transpose pixel-by-pixel data into bitplane-by-bitplane data. The methods and apparatus are especially useful for dynamically transposing high-speed flowing-through pixel data in a “real-time” fashion. In a transpose process, a stream of pixel data is received by a plurality of input lines of the transpose apparatus. The received pixel data are delayed by a set of delay units and then permutated by one or more switches according to a predefined delay scheme and permutation rule. After permutation, the stream of data is delayed so as to finalize the transpose process.