Electroscopic (e.g., Movable Electrodes Or Electrostatic Elements) Patents (Class 345/85)
  • Patent number: 8310421
    Abstract: An apparatus and method for driving a display a display. Two switches for each common line are used to couple the common line to a respective first and second hold voltage supply lines. A third switch for each common line is used to couple the common line to a drive line. A waveform generator is used to generate the driving waveform on the drive line.
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: November 13, 2012
    Assignee: Qualcomm Mems Technologies, Inc.
    Inventor: Mark M. Todorovich
  • Patent number: 8310442
    Abstract: The invention relates to methods and apparatus for forming images on a display utilizing a control matrix to control the movement of MEMs-based light modulators.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: November 13, 2012
    Assignee: Pixtronix, Inc.
    Inventors: Nesbitt W. Hagood, Stephen Lewis, Abraham McAllister, Roger W. Barton, Richard S. Payne, Jasper Lodewyk Steyn
  • Publication number: 20120262499
    Abstract: A control method for controlling an electro-optical device is disclosed. When an image in a display section is rewritten from a first image to a second image, a drive section is controlled such that voltage corresponding to the first gray level is applied to a first pixel whose gray level to be displayed changes from a second gray level to a first gray level, voltage corresponding to the first gray level is applied to a second pixel having two or more sides adjacent to pixels displayed in the second gray level when the first image is displayed, among pixels whose gray level to be displayed does not change and remains in the first gray level, and voltage is not applied to a third pixel, other than the second pixel, among the pixels whose gray level to be displayed does not change and remains in the first gray level.
    Type: Application
    Filed: April 9, 2012
    Publication date: October 18, 2012
    Applicant: Seiko Epson Corporation
    Inventor: Yuko Komatsu
  • Patent number: 8289249
    Abstract: Provided is a light blocking display device of an electric field driving type, including a barrier layer (150) including a plurality of driving holes (151) and having a first surface and a second surface, driving bodies (101) which are inserted into the driving holes (151) and have charges, a pixel electrode (120) formed on the first surface of the barrier layer (150), and a common electrode (22) formed on the second surface of the barrier layer (150), wherein the area of a cross section parallel to the first and second surfaces of the driving holes (151) is gradually changed from the first surface to the second surface.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: October 16, 2012
    Assignee: Dongjin Semichem Co., Ltd.
    Inventor: Chun-Hyuk Lee
  • Patent number: 8289613
    Abstract: A microelectromechanical (MEMS) device includes a substrate, a movable element over the substrate, and an actuation electrode above the movable element. The movable element includes a deformable layer and a reflective element. The deformable layer is spaced from the reflective element.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: October 16, 2012
    Assignee: Qualcomm Mems Technologies, Inc.
    Inventors: Clarence Chui, William Cummings, Brian Gally, Lior Kogut, Ming-Hau Tung, Yeh-Jiun Tung, Chih-Wei Chiang, Denis Endisch
  • Patent number: 8237643
    Abstract: A driving method and a transreflective display apparatus are provided herein. In the driving method, a plurality of voltage-to-transparency curves are provided. An ambient light intensity of the display apparatus is detected for determining a display mode, wherein the display mode is either a transmissive mode or a reflective mode. Next, one of the voltage-to-transparency curves is selected according to the display mode and the ambient light intensity for driving the display apparatus. Therefore, by referring a proper voltage-to-transparency curve to drive the display apparatus, the display quality of the display apparatus can be enhanced.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: August 7, 2012
    Assignee: Himax Technologies Limited
    Inventors: Biing-Seng Wu, Lin-Kai Bu, Ying-Lieh Chen
  • Patent number: 8213075
    Abstract: A multi-state light modulator comprises a first reflector. A first electrode is positioned at a distance from the first reflector. A second reflector is positioned between the first reflector and the first electrode. The second reflector is movable between an undriven position, a first driven position, and a second driven position, each having a corresponding distance from the first reflector. In one embodiment, the three positions correspond to reflecting white light, being non-reflective, and reflecting a selected color of light. Another embodiment is a method of making the light modulator. Another embodiment is a display including the light modulator.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: July 3, 2012
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, William J Cummings, Brian J Gally
  • Patent number: 8207920
    Abstract: A method for sensing the actuation and/or release voltages of a electromechanical system or a microelectromechanical device include applying a varying voltage to the device and sensing its state and different voltage levels. In one embodiment, the device is part of a system comprising an array of interferometric modulators suitable for a display. The method can be used to compensate for temperature dependent changes in display pixel characteristics.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: June 26, 2012
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Marc Mignard, Clarence Chui, Mithran C. Mathew, Jeffrey B. Sampsell
  • Patent number: 8194056
    Abstract: Another embodiment has a method of driving a display device including an array of MEMS elements is disclosed. The MEMS elements are characterized by a preferred set of drive potential differences including preferred positive and preferred negative actuation potential differences, preferred positive and preferred negative hold potential differences, and a preferred release potential difference, where the preferred set of drive potential differences is symmetric about a voltage differing from 0V by an offset ?V. Another embodiment has a reduced set of supply voltages are used, while maintaining the charge balancing effects of applying potential differences of opposite polarity without visible artifacts.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: June 5, 2012
    Assignee: QUALCOMM MEMS Technologies Inc.
    Inventor: Manish Kothari
  • Patent number: 8139008
    Abstract: Bi-stable display systems and driving methods thereof are presented. The bi-stable display system includes a bi-stable display panel having at least one substrate, at least one electrode disposed on the substrate, and a bi-stable display medium between the at least one electrode, wherein the at least one electrode extends to pluralities of electrode pads on the at least one side of peripheral regions. A data input device for inputting display data to the bi-stable display panel includes a plurality of input terminals corresponding to the electrode pads of the bi-stable display panel. A trigger device detects relative movement between the bi-stable display panel and the data input device and generates a trigging signal to shift data address in a data shifter, thereby renewing image data in the bi-stable display panel.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: March 20, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Chieh-Yi Huang, Chao-Kai Cheng, Yuh-Zheng Lee, Jyh-Wen Shiu, Yuan-Chang Liao
  • Patent number: 8134772
    Abstract: A micromirror device includes an elastic hinge for supporting a mirror on a substrate, and an address electrode for deflecting the mirror. The device further includes a protective layer and an oriented monolayer laid to cover a stopper also functioning as an address electrode provided below the mirror and between the mirror and the substrate.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: March 13, 2012
    Assignees: Silicon Quest Kabushiki-Kaisha, Olympus Corporation
    Inventors: Yoshihiro Maeda, Fusao Ishii, Kazuhiro Watanabe, Hirotoshi Ichikawa
  • Patent number: 8125423
    Abstract: A voltage control circuit which can prevent the occurrence of imprint phenomenon is provided. In a voltage control circuit which applies voltage to a pair of electrodes including a first and a second electrode, a control unit switches the voltage applied to the pair of electrodes, in response to an operation mode of this circuit. In a normal mode, the control unit fixedly applies a first voltage to the first electrode and applies a data voltage of the first voltage or the second voltage to the second electrode, based on an instruction from the control unit. In an inversion mode, the second voltage is fixedly applied to the first electrode, and the data voltage of the first voltage or second voltage is applied to the second electrode. The control unit switches the mode between the normal mode and the inversion mode, in a predetermined cycle.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: February 28, 2012
    Assignee: Rohm Co., Ltd.
    Inventors: Takaaki Fuchikami, Yoshikazu Fujimori
  • Patent number: 8115989
    Abstract: Anti-stiction systems may include one or more anti-stiction electrodes driven to provide an electrical force that counteracts a stiction force acting upon a moveable portion of an interferometric modulator. The anti-stiction electrode(s) may be disposed on a back glass or on another such substrate. The anti-stiction electrode(s) may be configured to apply an electrical force to substantially all of the interferometric modulators in a display device at once and/or may be configured to apply an electrical force only to a selected area. In some embodiments, the sum of an anti-stiction electrical force and a mechanical restoring force of a moveable part of an interferometric modulator is sufficient to counteract a stiction force.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: February 14, 2012
    Assignee: Qualcomm Mems Technologies, Inc.
    Inventor: Manish Kothari
  • Patent number: 8106860
    Abstract: A composite display may include a paddle configured to sweep out an area and a plurality of pixel elements mounted on the paddle. Selectively activating one or more of the plurality of pixel elements while the paddle sweeps the area may cause at least a portion of an image to be rendered. A characteristic of at least one pixel element of the plurality of pixel elements that is associated with balancing luminance across the composite display associated with the paddle may be based, at least in part, on a radial distance of the one pixel element from an axis of rotation of the paddle.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: January 31, 2012
    Assignee: Qualcomm Mems Technologies, Inc.
    Inventor: Clarence Chui
  • Patent number: 8102592
    Abstract: Interferometric modulators include a movable mirror that is actuated by voltage applied to a plurality of electrodes relative to at least one other electrode, to define a cavity relative to a partially reflective mirror formed by a top plate. The depth of the cavity determines a bandwidth of light that is modulated by internal reflections within the cavity and which interferes with light that is reflected from a partially reflective mirror on the top plate, producing a desired reflected color of light for the modulator. Variations in manufacturing and material characteristics can cause the movable mirror to tilt relative to the partially reflective mirror, which degrades the modulation accuracy. To compensate, different voltages can be applied to the plurality of electrodes. The voltage can be determined at time of manufacture and stored in non-volatile memory, for use when the modulator is actuated during use.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: January 24, 2012
    Assignee: Unipel Technologies, LLC
    Inventor: Zhong Ji
  • Patent number: 8102363
    Abstract: In at least one embodiment, a driving method of an electrophoresis display device includes an image-erasing step in which an old image displayed on the displaying section of the electrophoresis display device is erased. The image-erasing step of the driving method of the electrophoresis display device further includes a first image-erasing sub step of displaying a first gradation in each of the pixels of a first area and displaying a second gradation in each of the pixels of a second area; and a second image-erasing sub step of displaying the second gradation in each of the pixels of the first area and displaying the first gradation in each of the pixels of the second area.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: January 24, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Hiroshi Hirayama
  • Patent number: 8098431
    Abstract: Various embodiments of the invention relate to methods and systems for generating the color white in displays created from interferometric modulators and more specifically, to the generation of the color white through the use of reflected light at two wavelengths. In one embodiment, a display device displays the color white. The color white is generated by reflecting light from two pluralities of interferometric modulator types. The first modulator type reflects colored light at a specific wavelength. The second modulator type reflects colored light selected to be at a wavelength complementary to the first. The combined light reflected from the two types appears white in the display.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: January 17, 2012
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventor: Philip D. Floyd
  • Patent number: 8089431
    Abstract: The present invention provides a various methods, systems and devices for controlling light modulating elements and/or spatial light modulators. In some embodiments of the present invention, a recursive feedback method is used to control light modulating elements and/or spatial light modulators.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: January 3, 2012
    Assignee: Syndiant, Inc.
    Inventors: Karl M. Guttag, Alvin Guttag
  • Patent number: 8077377
    Abstract: The invention relates to methods to improve SLMs, in particular to reflecting micromechanical SLMs, for applications with simple system architecture, high precision, high power handling capability, high throughput, and/or high optical processing capability. Applications include optical data processing, image projection, lithography, image enhancement, holography, optical metrology, coherence and wavefront control, and adaptive optics. A particular aspect of the invention is the achromatization of diffractive SLMs so they can be used with multiple wavelengths sequentially, simultaneously or as a result of spectral broadening in very short pulses.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: December 13, 2011
    Assignee: Micronic MyData AB
    Inventor: Torbjorn Sandstrom
  • Patent number: 8072402
    Abstract: An optical device suitable for forming a pixel in a video display. The optical device includes a first layer having a first refractive index; a second layer over the first layer, the second layer having a second refractive index less than the first refractive index; and a third layer over the second layer, the third layer having a third refractive index larger than the second refractive index; and a fourth layer that is at least partially optically absorptive, wherein the optical stack and the fourth layer are a first distance from one another when the device is in a first state and are a second distance from one another when the device is in a second state, the first distance different from the second distance.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: December 6, 2011
    Assignee: Qualcomm Mems Technologies, Inc.
    Inventor: Gang Xu
  • Patent number: 8054253
    Abstract: An organic light emitting diode display and an aging method thereof are presented. The method provides the organic light emitting diode display with improved reliability as a progressive dark defect is removed, and the lifetime and the white balance of the organic light emitting diode display is secured by executing an aging treatment of high luminance using a pixel circuit including an aging circuit for supplying the organic light emitting diode with an aging pulse.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: November 8, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventor: Jaeho Yoo
  • Patent number: 8054218
    Abstract: A remotely-alterable electronic-ink based display device for displaying graphical indicia within a GPS system transmitting a plurality of GPS signals to the device display device. The device employs an addressable display assembly including a layer of electronic ink including a bi-stable non-volatile imaging material. The device includes an integrated circuit structure having a GPS signal receiver, a storage element for storing instructions, programs and data, and a programmed processor in electrical communication with the addressable display assembly and an antenna structure. A signal transmitting structure transmits signals from the antenna structure to the remote activator module. A signal receiving structure receives electromagnetic signals from the remote activator module, using the antenna structure. An on-board battery power structure, operably connected to the integrated circuit structure, supplies electrical power the integrated circuit structure.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: November 8, 2011
    Assignee: Metrologic Instruments, Inc.
    Inventor: Alexander Gelbman
  • Patent number: 8044926
    Abstract: In an information display panel, in which one or more groups of display media having light reflectance and charge characteristic, constituted by at least one group of particles, are sealed between opposed two substrates, at least one substrate being transparent, and, in which the display media, to which an electrostatic field is applied, are made to move so as to display information, in order to seal a space between one substrate and the other substrate, a gap-space maintaining member is formed at either one or both of an outer side and an inner side with respect to a sealing-agent arranging portion arranged at an outer peripheral portion of an information display region of the panel.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: October 25, 2011
    Assignee: Bridgestone Corporation
    Inventor: Takanori Shoji
  • Patent number: 8040332
    Abstract: A light scan device which forces a beam light depending on an image signal to scan, including: a light source part for supplying the beam light; and a scanning part for forcing the beam light from the light source part to scan an illumination-target region in a first direction and a second direction substantially orthogonal to the first direction, wherein the scanning part is driven so that a frequency with which the beam light is forced to scan in the first direction is higher than a frequency with which the beam light is forced to scan in the second direction, and a spot formed on the illumination-target region by the beam light has a form with a shorter size in the first direction than in the second direction.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: October 18, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Tetsuro Yamazaki, Takashi Takeda, Daisuke Uchikawa, Yasunaga Miyazawa
  • Patent number: 8031157
    Abstract: According to an aspect of the present invention, there is provided an output circuit including a first output unit supplying a first voltage, a second output unit supplying a second voltage, a switching unit selectively outputting, to an output end, the first voltage from the first output unit and the second voltage from the second output unit, a detection unit detecting a voltage of the output end, and a control unit controlling one of the first voltage and the second voltage on the basis of the voltage detected by the detection unit.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: October 4, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomohiro Ando, Masaji Ueno
  • Patent number: 8023169
    Abstract: One embodiment includes display comprising a light modulator configured to display a portion of an image such as a reflective light modulator, a light emitter configured to display the portion of the image and a circuit configured to selectively provide signals to at least one of the light modulator and the light emitter indicative of the portion of the image. In one such embodiment, an active matrix provides a simple, efficient drive for such devices. Other embodiments methods of making and driving such devices.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: September 20, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventor: Je-Hsiung Lan
  • Publication number: 20110210910
    Abstract: Systems and methods of displaying an end-of-life image on an electronic display are disclosed. An end-of-life image is displayed on a MEMS display device in the presence of sufficient water vapor and without continued activation of the display. The image can be displayed in response to user input, in response to detection of a predefined level of water vapor within the display package, according to a prestored lifetime of the device, or according to the natural expiration of the lifetime of the display device and packaging.
    Type: Application
    Filed: March 24, 2011
    Publication date: September 1, 2011
    Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.
    Inventor: Lauren Palmateer
  • Patent number: 8004504
    Abstract: A display element, such as an interferometric modulator, comprises a transparent conductor configured as a first electrode and a movable mirror configured as a second electrode. Advantageously, the partial reflector is positioned between the transparent conductor and the movable mirror. Because the transparent conductor serves as an electrode, the partial reflector does not need to be conductive. Accordingly, a greater range of materials may be used for the partial reflector. In addition, a transparent insulative material, such as a dielectric, may be positioned between the transparent conductor and the partial reflector in order to decrease a capacitance of the display element without changing a gap distance between the partial reflector and the movable mirror. Thus, a capacitance of the display element may be reduced without changing the optical characteristics of the display element.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: August 23, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: William J. Cummings, Brian J. Gally
  • Patent number: 7999773
    Abstract: A display apparatus and a manufacturing method thereof which allow a component to be replaced and repaired simply, rapidly, and stably are provided. The display apparatus comprises a main body which accommodates a light source part, and comprises a display element which displays an image using light emitted from the light source part; an element panel which accommodates the display element; a front cover which is coupled to the main body and provided with a panel mounting part to which the element panel is detachably coupled; and an element driving board which is coupled to the front cover, is opposite to the main body, interposes the front cover between the element driving board and the main body, and is electrically connected with the display element.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: August 16, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-hak Moon, Kyoung-choul Jang, Byung-jo Kang
  • Patent number: 7999993
    Abstract: An interferometric light modulating device having two viewing surfaces is provided. In some embodiments, the device can generate two distinct images, one on each side of the device, simultaneously.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: August 16, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Mark W Miles
  • Patent number: 7999995
    Abstract: A full color range analog controlled interferometric modulation device is provided. The device includes a transparent substrate, and a transparent fixed-position electrically conductive electrode with a bottom surface overlying the substrate. A transparent spacer overlies the fixed-position electrode, and an induced absorber overlies the spacer. An optically reflective electrically conductive moveable membrane overlies the induced absorber. A cavity is formed between the induced absorber and the moveable membrane having a maximum air gap dimension less than the spacer thickness. In one aspect, the distance from the top surface of the fixed-position electrode to a cavity lower surface is at least twice as great as the cavity maximum air gap dimension. In another aspect, at least one anti-reflective coating (ARC) layer is interposed between the substrate and the fixed-position electrode, and at least one ARC layer is interposed between the fixed-position electrode and the spacer.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: August 16, 2011
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Akinori Hashimura, Douglas J. Tweet, Apostolos T. Voutsas
  • Patent number: 7982700
    Abstract: Embodiments of an interferometric modulator are disclosed having various enhancements and features including a conductive bus. In certain embodiments, the interferometric modulator has a first conductive layer suspended over a second electrode layer. In certain embodiments, a second conductive layer is provided over the first conductive layer. One of the first and/or second conductive buses may further connect to the first electrode layer and/or the second electrode layer. Other disclosed features can be incorporated into embodiments of the interferometric modulator to improve response time, power consumption, and image resolution.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: July 19, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Jeffrey B. Sampsell
  • Patent number: 7969639
    Abstract: A micro-opto-electro-mechanical systems (MOEMS) electro optical modulator (2) having an electrically tuneable optical resonator comprising an asymmetric Fabry-Perot etalon incorporating a mirror (10) resiliency biased with respect to a substrate (13) and moveable in relation thereto in response to a voltage applied there-between. The optical modulator (2) is capable of modulating electromagnetic radiation having a plurality of wavelengths. The modulator is adapted to modulate the transmission of short wave infrared radiation (SWIR), medium wave infrared radiation (MWIR) and long wave infrared radiation (LWIR) and the reflection of visible radiation. A spatial optical modulator having a plurality of said MOEMS optical modulators (2). A method of addressing said spatial optical modulator.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: June 28, 2011
    Assignee: QinetiQ Limited
    Inventors: Mark Edward McNie, Keith Loder Lewis, Andrew Maxwell Scott, Christopher William Slinger, Kevin Michael Brunson, Gilbert William Smith
  • Patent number: 7969395
    Abstract: The present invention discloses a spatial light modulator includes a plurality of pixel elements disposed on a substrate. Each of the pixel elements comprises a deflectable micromirror. Specifically, instead of SRAM, the spatial light modulator is implemented with a DRAM in each of the pixel elements. The DRAM in each of the pixel elements has a smaller number of transistors than SRAM. The spatial light modulator can be manufactured with smaller pixel size and circuit configuration with improved withstand voltage. Further improvements can also be achieved for manufactured the spatial light modulator with smaller capacitor with better layout configuration for wire connections and control signal transmissions.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: June 28, 2011
    Assignees: Silicon Quest Kabushiki-Kaisha, Olympus Corporation
    Inventors: Naoya Sugimoto, Yoshihiro Maeda, Fusao Ishii
  • Patent number: 7948457
    Abstract: Methods of writing display data to MEMS display elements are configured to minimize charge buildup and differential aging. Prior to writing rows of image data, a pre-write operation is performed. The pre-write operation with either actuate or release substantially all pixels in a row prior to writing the image data. In some embodiments, the selection between actuating or releasing is performed in a random or pseudo-random manner.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: May 24, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Manish Kothari, William J. Cummings
  • Patent number: 7944599
    Abstract: A microelectromechanical (MEMS) device includes a substrate, a movable element over the substrate, and an actuation electrode above the movable element. The movable element includes a deformable layer and a reflective element. The deformable layer is spaced from the reflective element.
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: May 17, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, William Cummings, Brian Gally, Lior Kogut, Ming-Hau Tung, Yeh-Jiun Tung, Chih-Wei Chiang, Denis Endisch
  • Patent number: 7944602
    Abstract: Various embodiments include interferometric optical modulators comprising a substrate layer having a thickness between about 0.1 mm to about 0.45 mm thick and a method for manufacturing the same. The interferometric modulator can be integrated together with a diffuser in a display device. The thin substrate permits use of a thicker diffuser. The thinner substrate may increase resolution and reduce overall thickness of the interferometric modulator. The thicker diffuser may provide increased diffusion and durability.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: May 17, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventor: Clarence Chui
  • Publication number: 20110109534
    Abstract: There is provided an electronic paper display device and a method of manufacturing the same. An electronic paper display device according to an aspect of the invention may include: first and second electrodes facing each other; an elastomer matrix provided between the first and second electrodes and having one or more protrusions spaced apart at predetermined intervals therebetween; and one or more rotary bodies having optical and electrical anisotropy and being disposed within each of the protrusions. An electronic paper display device according to an aspect of the invention includes rotary bodies being densely arranged with a small thickness, thereby improving a contrast ratio and requiring relatively low driving voltage. Furthermore, predetermined intervals within an elastomer matrix provide a space in which the elastomer matrix can be bent, thereby increasing flexibility.
    Type: Application
    Filed: April 1, 2010
    Publication date: May 12, 2011
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sang Moon LEE, Hwan-Soo Lee, Young Woo Lee, Jeong Bok Kwak
  • Patent number: 7928940
    Abstract: Embodiments of exemplary MEMS interferometric modulators are arranged at intersections of rows and columns of electrodes. In certain embodiments, the column electrode has a lower electrical resistance than the row electrode. A driving circuit applies a potential difference of a first polarity across electrodes during a first phase and then quickly transition to applying a bias voltage having a polarity opposite to the first polarity during a second phase. In certain embodiments, an absolute value of the difference between the voltages applied to the row electrode is less than an absolute value of the difference between the voltages applied to the column electrode during the first and second phases.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: April 19, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Manish Kothari, Marc Mignard, Mithran C. Mathew, Jeffrey B. Sampsell
  • Patent number: 7919775
    Abstract: A method of operating a semiconductor device, a semiconductor device and a digital micromirror system are presented. In an embodiment, the semiconductor device comprises a grounded substrate, a memory array, and a reset driver. The memory array may be isolated from the grounded substrate with a buried layer. The set of voltages of the memory array may be shifted with respect to a reset voltage. The reset driver may drive the reset voltage and the reset driver may have at least one extended drain transistor in the grounded substrate.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: April 5, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: James D. Huffman, James N. Hall
  • Patent number: 7916104
    Abstract: A method for increasing intensity resolution (bit-depth) using LED illumination. A preferred embodiment comprises determining a display time for a bit to be displayed on a display system, with the display time being based upon a weighting of the bit. If the display time is less than a minimum display time of the display system, then a light modulator and light source modulation are to be used to display the bit. If the display time is equal to or greater than the minimum display time, then a light modulator is to be used to display the bit. The use of a light source that can switch at a faster rate than the light modulator can change states and/or a light source that can produce light at multiple intensities can permit the display of less light and thereby increase the bit-depth of the display system.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: March 29, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory James Hewlett, Donald B. Doherty
  • Patent number: 7916103
    Abstract: Systems and methods of displaying an end-of-life image on an electronic display are disclosed. An end-of-life image is displayed on a MEMS display device in the presence of sufficient water vapor and without continued activation of the display. The image can he displayed in response to user input, in response to detection of a predefined level of water vapor within the display package, according to a prestored lifetime of the device, or according to the natural expiration of the lifetime of the display device and packaging.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: March 29, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventor: Lauren Palmateer
  • Patent number: 7911428
    Abstract: Embodiments include methods and devices for controlling the spectral profile and color gamut of light produced by an interferometric display. Such devices include illuminating a display with selected wavelengths of light. Embodiments also include a display comprising separate sections that output different predetermined colors of light. Other embodiments include methods of making the aforementioned devices.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: March 22, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Brian J. Gally, William J. Cummings
  • Patent number: 7907319
    Abstract: An interferometric modulator (Imod) cavity has a reflector and an induced absorber. A direct view reflective flat panel display may include an array of the modulators. Adjacent spacers of different thicknesses are fabricated on a substrate by a lift-off technique used to pattern the spacers which are deposited separately, each deposition providing a different thickness of spacer. Or a patterned photoresist may be used to allow for an etching process to selectively etch back the thickness of a spacer which was deposited in a single deposition. A full-color static graphical image may be formed of combined patterns of interferometric modulator cavities. Each cavity includes a reflector, and an induced absorber, the induced absorber including a spacer having a thickness that defines a color associated with the cavity.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: March 15, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventor: Mark W. Miles
  • Patent number: 7889163
    Abstract: Embodiments of exemplary MEMS interferometric modulators are arranged at intersections of rows and columns of electrodes. In certain embodiments, the column electrode has a lower electrical resistance than the row electrode. A driving circuit applies a potential difference of a first polarity across electrodes during a first phase and then quickly transition to applying a bias voltage having a polarity opposite to the first polarity during a second phase. In certain embodiments, an absolute value of the difference between the voltages applied to the row electrode is less than an absolute value of the difference between the voltages applied to the column electrode during the first and second phases.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: February 15, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Clarence Chui, Manish Kothari, Marc Mignard, Mithran C. Mathew, Jeffrey B. Sampsell
  • Patent number: 7889162
    Abstract: A display device comprising a light guide (12), a front plate (14), and an intermediate electromechanically operable foil (16). Two electrode layers (22, 23) are arranged on either side of the foil (16) to induce electrostatic forces on the foil (16) and to bring selected portions of the foil into contact with the light guide (12), thereby extracting light from the light guide (12). The second electrode layer (22) is arranged on the opposite side of the light guide (12) with reference to the foil (16), and separated from the light guide (12) by means of a refractive layer (28). As no electrode layer is required on the light guide itself, the light path of rays extracted from the light guide is cleaner, and the absorption of light is reduced. The light guide can have a thickness such that the light extracted from the light guide per unit length is sufficient to allow for line-at-a-time addressing.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: February 15, 2011
    Assignee: Rambus Inc.
    Inventors: Ramon Pascal Van Gorkom, Peter Alexander Duine, Volker Schoellmann, Ruediger Johannes Lange, Siebe Tjerk De Zwart
  • Patent number: 7884988
    Abstract: A micromechanical device and system utilizing a supplemental reset pulse to ensure deflectable members deflect to the desired position. After loading data into a micromechanical device, a reset pulse is used to position the deflectable member to a position indicated by the data. A supplemental reset pulse is then applied to ensure the deflectable member is driven to the position indicated by the data. The method and system are also used to ensure the deflectable members are driven to a neutral position.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: February 8, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory J. Hewlett, Darren T. McCosky
  • Patent number: 7884989
    Abstract: An iterferometric modulator array is configured to reflect a broad band spectrum of optical wavelengths by arranging a reflector and a partially transparent substrate in a non-parallel relationship.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: February 8, 2011
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Brian J. Gally, William J. Cummings, Ming-Hau Tung, Lior Kogut, Marc Mignard
  • Patent number: 7876298
    Abstract: A spatial light modulator clocking method, called fast-clear, which employs embedded clear hardware in the SLM to enable the fast-clear bit to generate least-significant short-bit periods and without any bit ordering restrictions. In this method, fast data clears 34 are inserted between block data loads 32,36 within a frame refresh period. This method virtually eliminates the artifacts associated with the earlier reset-release timing method without the bit-ordering restriction of the jog-clear method.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: January 25, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory J. Hewlett, Donald B. Doherty
  • Patent number: 7859554
    Abstract: An apparatus, methods, and systems for multi-color projection or display for video or lighting applications. One aspect of the present invention comprises an algorithm for utilizing at least four primary light sources to represent a projected pixel color. The algorithm and associated system can be applied to both a natively monochromatic light source or traditional light sources filtered for their colored components. The algorithm can be used for either color sequential or parallel modes of operation. The algorithm takes input pixel data represented in a universal color coordinate system, performs a color transform, and disperses the results among parallel display devices or sequentially to a single device such that each pixel is presented by the combination of four or more primaries.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: December 28, 2010
    Inventor: Garrett J. Young