Plural Mechanically Movable Display Elements Patents (Class 345/108)
  • Patent number: 5497172
    Abstract: A method of implementing pulse-width modulated image display systems (10, 20) with a spatial light modulator (SLM) (15) configured for split-reset addressing. Display frame periods are divided into time slices. Each frame of data is divided into bit-planes, each bit-plane having one bit of data for each pixel element and representing a bit weight of the intensity value to be displayed by that pixel element. Each bit-plane has a display time corresponding to a number of time slices, with bit-planes of higher bit weights being displayed for more time slices. The bit-planes are further formatted into reset groups, each reset group corresponding to a reset group of the SLM (15). The display times for reset groups of more significant bits are segmented so that the data can be displayed in segments rather than for a continuous time. During loading, segments of corresponding bit-planes are temporally aligned from one reset group to the next.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: March 5, 1996
    Assignee: Texas Instruments Incorporated
    Inventors: Donald B. Doherty, Robert J. Gove, Mark L. Burton, Rodney D. Miller
  • Patent number: 5471584
    Abstract: A spatial light modulator of the so-called deformable mirror device (DMD) type has an array of individual mirror ments (20) arranged in lines. The elements are individually driven to change their orientations. Portions (30) of the mirror ments are non-reflecting such as to divide the mirror elements into substantially equal portions forming a greater number of lines of narrower width, with a view to reducing the subjectively visible line structuring.
    Type: Grant
    Filed: August 28, 1993
    Date of Patent: November 28, 1995
    Assignee: Rank Brimar Limited
    Inventors: Peter W. Blaxtan, John Gillespie
  • Patent number: 5459610
    Abstract: A modulator for modulating incident rays of light, the modulator comprising a plurality of equally spaced apart beam elements, each of which includes a light reflective planar surface. The elements are arranged parallel to each other with their light reflective surfaces parallel to each other. The modulator includes means for supporting the beam elements in relation to one another and means for moving the beam elements relative to one another so that the beams move between a first configuration wherein the modulator acts to reflect the incident rays of light as a plane mirror, and a second configuration wherein the modulator diffracts the incident rays of light as they are reflected therefrom. At least one of the facing surfaces of the beam elements and underlying substrate is configured to reduce any tendency to stick as they are pulled together.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: October 17, 1995
    Assignee: The Board of Trustees of the Leland Stanford, Junior University
    Inventors: David M. Bloom, Francisco S. A. Sandejas, Olav Solgaard, Raj B. Apte
  • Patent number: 5442374
    Abstract: A color display has a transparent cover glass having a color stripe filter; a translucent data film located in proximity to a face of the color stripe filter to overlap and display image information; a writing device for writing the information to the data film; an erasing device for erasing the written information from the data film; a writing-erasing controller for controlling operations of the writing and erasing devices; a winder for selectively feeding the data film in normal and reverse directions by forming the data film in a web shape, and winding the data film; a controller for controlling an operation of the winder; and an illuminating device for visualizing these information toward a viewer. In this color display, an image written to the data film can be completely erased rapidly and it is possible to obtain an image having a high quality and a very preferable contrast without any shift in image color.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: August 15, 1995
    Assignee: Ricoh Company, Ltd.
    Inventor: Yutaka Koizumi
  • Patent number: 5430463
    Abstract: The invention relates to a display element and to its use in a display panel, and to a display system.This display element is generally in the form of a cube (32) and thus comprises four display faces of different color. This cube (32) is mounted so as to rotate on fixed shafts (34), in column C.sub.n and in row R.sub.m. These cubes include rotation means such as teeth and erasing means such as a recess.By virtue of the these rotation means such as teeth and these erasing means such as a recess, the rotating of a display element is simplified, and more foolproof and reliable, which improves the operation of the display panel made up of such display elements.
    Type: Grant
    Filed: April 6, 1994
    Date of Patent: July 4, 1995
    Assignee: FM Incoming
    Inventor: Eric Fontalirant
  • Patent number: 5387924
    Abstract: Methods are disclosed by which the effects of a defective electromechanical pixel (20) having a beam (30) and a hinge (34,36) are mitigated. These methods may damage the hinge (34,36) or the beam (30) and comprise the step of applying a voltage sufficient to damage the hinge (34,36) or beam (30) of said electromechanical pixel (20) by mechanical overstress, thermal overstress, electrochemical reaction, or thermally induced chemical reaction. Other methods are also disclosed.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: February 7, 1995
    Assignee: Texas Instruments Incorporated
    Inventors: Richard O. Gale, Jr., Brian C. McCormack
  • Patent number: 5382961
    Abstract: A preferred embodiment of the present invention provides a method of addressing a digital micromirror device (DMD) having an array of electromechanical pixels (20) comprising deflectable beams (30) wherein each of the pixels (20) assume one of two or more selected stable states according to a set of selective address voltages. A first step of the preferred method is electromechanically latching, by applying a bias voltage with an AC and a DC component to the array of pixels (20), each of the pixels (20) in one of the selected stable states. A second step is applying a new set of selective address voltages to all the pixels (20) in the array. A third step is electromechanically unlatching, by removing the bias voltage from the array, the pixels (20) from their previously addressed state. A fourth step is allowing the array of pixels (20) to assume a new state in accordance with the new set of selective address voltages.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: January 17, 1995
    Assignee: Texas Instruments Incorporated
    Inventor: Richard O. Gale, Jr.
  • Patent number: 5339116
    Abstract: It is possible to replace a standard tuning unit in a television with spatial light modulator circuitry to improve the resolution seen by the viewer. The invention herein provides a system architecture, individual part of the system and techniques for minimizing the burst data rate while maintaining a reasonable system speed. The resultant system provides better resolution with a manageable data rate and bandwidth.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: August 16, 1994
    Assignee: Texas Instruments Incorporated
    Inventors: Paul M. Urbanus, Jeffrey B. Sampsell
  • Patent number: 5325108
    Abstract: A display system using a matrix of rotatable display elements is provided in which the optical states of the display elements can be read back to confirm that the matrix is portraying information correctly. The display system is arranged to automatically ameliorate the effect of detected non-operating display elements on the intelligibility of the message displayed.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: June 28, 1994
    Assignee: Unisplay S.A.
    Inventor: Hassan P. A. Salam
  • Patent number: 5311360
    Abstract: A modulator for modulating an incident beam of light, the modulator comprising a plurality of equally spaced-apart elements, each of which includes a light-reflective planar surface. The elements are arranged parallel to each other with their light-reflective surfaces parallel to each other. The modulator includes means for supporting the elements in relation to one another and means for moving particular ones of the elements relative to others so that the moved elements transit between a first configuration wherein the modulator acts to reflect the incident beam of light as a plane mirror, and a second configuration wherein the modulator diffracts the light reflected therefrom. In operation the light-reflective surfaces of the elements remain parallel to each other in both the first and second configurations. The perpendicular spacing between the reflective surfaces of the respective elements is equal to m/4 .times.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: May 10, 1994
    Assignee: The Board of Trustees of the Leland Stanford, Junior University
    Inventors: David M. Bloom, Francisco S. A. Sandejas, Olav Solgaard
  • Patent number: 5289172
    Abstract: Methods are disclosed by which the effects of a defective electromechanical pixel (20) having a beam (30) and a hinge (34,36) are mitigated. These methods may damage the hinge (34,36) or the beam (30) and comprise the step of applying a voltage sufficient to damage the hinge (34,36) or beam (30) of said electromechanical pixel (20) by mechanical overstress, thermal overstress, electrochemical reaction, or thermally induced chemical reaction. Other methods are also disclosed.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: February 22, 1994
    Assignee: Texas Instruments Incorporated
    Inventors: Richard O. Gale, Jr., Brian C. McCormack
  • Patent number: 5285196
    Abstract: A preferred embodiment of the present invention provides a method of addressing a digital micromirror device (DMD) having an array of electromechanical pixels (20) comprising deflectable beams (30) wherein each of the pixels (20) assume one of two or more selected stable states according to a set of selective address voltages. A first step of the preferred method is electromechanically latching, by applying a bias voltage with an AC and a DC component to the array of pixels (20), each of the pixels (20) in one of the selected stable states. A second step is applying a new set of selective address voltages to all the pixels (20) in the array. A third step is electromechanically unlatching, by removing the bias voltage from the array, the pixels (20) from their previously addressed state. A fourth step is allowing the array of pixels (20) to assume a new state in accordance with the new set of selective address voltages.
    Type: Grant
    Filed: October 15, 1992
    Date of Patent: February 8, 1994
    Assignee: Texas Instruments Incorporated
    Inventor: Richard O. Gale, Jr.
  • Patent number: 5280277
    Abstract: The bistable deformable mirror device (DMD) used in a high-definition television (HDTV) application must be capable of supporting at least 128 grey levels, using pulse-width modulation. If the DMD is line-updated, then the minimum field time to support 128 grey levels cannot be achieved because of the time required to perform a resonant reset once each line. This disclosure shows how the DMD can be field-updated in order to achieve the minimum required field time.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: January 18, 1994
    Assignee: Texas Instruments Incorporated
    Inventor: Larry J. Hornbeck