By Reflection Patents (Class 359/263)
  • Patent number: 7532379
    Abstract: An electro-optic semiconductor device (e.g., an optical modulator) having side access and beam propagation within the device is provided. Side access for the optical input and/or output facilitates disposition of electronic circuitry and/or heat sinking structures on the top and bottom surfaces of the modulator. Internal beam propagation instead of internal waveguiding advantageously simplifies optical coupling and alignment to the modulator. Interaction length within the device is preferably enhanced by passing through the device active region at a relatively shallow angle. The internally propagating beam is reflected from a reflective face parallel to the device active region. The side faces can be perpendicular or tilted with respect to the reflective face. Tilted side faces are preferably tilted to provide external beam paths parallel to the reflective face. Internal reflection from an angled side face can be employed to provide configurations having one side port and one top or bottom port.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: May 12, 2009
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: David A. B. Miller, Jonathan E. Roth
  • Patent number: 7532384
    Abstract: A phase shifter includes at least one photonic crystal structure having alternating high and low index dielectric layers. At least two defect structures are positioned between said photonic crystal structures. The defect structure includes one or more nonlinear materials used to produce an index change, whose effect is amplified to produce a specified phase shift in the output signal of said phase shifter.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: May 12, 2009
    Assignee: Massachusetts Institute of Technology
    Inventors: Peter Bermel, John D. Joannopoulos
  • Publication number: 20090086302
    Abstract: An electro-optic semiconductor device (e.g., an optical modulator) having side access and beam propagation within the device is provided. Side access for the optical input and/or output facilitates disposition of electronic circuitry and/or heat sinking structures on the top and bottom surfaces of the modulator. Internal beam propagation instead of internal waveguiding advantageously simplifies optical coupling and alignment to the modulator. Interaction length within the device is preferably enhanced by passing through the device active region at a relatively shallow angle. The internally propagating beam is reflected from a reflective face parallel to the device active region. The side faces can be perpendicular or tilted with respect to the reflective face. Tilted side faces are preferably tilted to provide external beam paths parallel to the reflective face. Internal reflection from an angled side face can be employed to provide configurations having one side port and one top or bottom port.
    Type: Application
    Filed: September 19, 2006
    Publication date: April 2, 2009
    Inventors: David A.B. Miller, Jonathan E. Roth
  • Publication number: 20080297878
    Abstract: The present invention is a device, method and system for making a display and displaying information that includes a fibrous organic substrate, e.g., multiribbon cellulose or cellulose substrate, and a variable reflectivity dye disposed in the fibrous substrate, wherein the reflectivity of the dye is modulated in situ. The display device may use a dye selected from an electrochromic, a thermochromic, a magnetochromic, an ionochromic, a light sensitive, a fluorescent, a fluorescent effect energy transfer dye or combinations thereof and may be used as high storage, high contrast and/or high definition paper.
    Type: Application
    Filed: September 19, 2006
    Publication date: December 4, 2008
    Applicant: Board Of Regents, The University of Texas System
    Inventors: R. Malcolm Brown, Yuyu Sun, Robert Wenz
  • Publication number: 20080291521
    Abstract: Provided are a reflective unit using an electroactive polymer and a flexible display. The reflective unit includes: an electroactive polymer layer which becomes strained when a voltage is applied thereto by an electrode; a light reflecting unit reflecting external light and having reflecting cells arranged on the electroactive polymer layer to be spaced apart from one another wherein a distance between the reflecting cells is changed according to the strain of the electroactive polymer layer; and a light blocking layer preventing external light from being reflected by the light reflecting unit and having blocking cells arranged over the light reflecting unit to be spaced apart from one another.
    Type: Application
    Filed: December 13, 2007
    Publication date: November 27, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jin-hwan KIM, Byoung-ho Cheong, Hong-seok Lee
  • Patent number: 7457026
    Abstract: A light modulator array includes a plurality of light modulator devices, each the light modulator device including a resistor, a conductor coupled to a first end of the resistor, a post coupled to a second end of the resistor, and a reflective plate supported by the post, an insulator separating a first of the modulator devices from an adjacent light modulator device, and an energy penetration reducer configured to prevent the insulator from becoming conductive in a region between a resistor of the first light modulator device and a conductor of the adjacent device.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: November 25, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Robert W. Shreeve, Steve P. Hanson, Timothy R Emery, George Radominski, Martha A. Truninger
  • Patent number: 7453620
    Abstract: To provide a spatial optical modulation element having a long life free from a deterioration of optical modulation characteristics even if a high power laser beam with an ultra-short pulse is used as a modulation drive light. A spatial optical modulation element 1 wherein disposed between a prism 2 and an optical functional material layer 3 made of an optical functional material with the refractive index changeable by light irradiation, is a low refractive index layer 4 made of a transparent material with a refractive index lower than the refractive index of the dielectric. A spatial optical modulation method characterized in that using such a spatial optical modulation element 1, at the interface between the prism and the low refractive index layer, reflection of a to-be-modulated light 5 entering through the prism, is controlled by a modulation drive light 6.
    Type: Grant
    Filed: March 3, 2006
    Date of Patent: November 18, 2008
    Assignee: Asahi Glass Company, Limited
    Inventors: Toshihiko Nagamura, Ikuo Matsukura
  • Patent number: 7440590
    Abstract: A technique, associated system and program code, for retrieving depth information about at least one surface of an object. Core features include: projecting a composite image comprising a plurality of modulated structured light patterns, at the object; capturing an image reflected from the surface; and recovering pattern information from the reflected image, for each of the modulated structured light patterns. Pattern information is preferably recovered for each modulated structured light pattern used to create the composite, by performing a demodulation of the reflected image. Reconstruction of the surface can be accomplished by using depth information from the recovered patterns to produce a depth map/mapping thereof.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: October 21, 2008
    Assignee: University of Kentucky Research Foundation
    Inventors: Laurence G. Hassebrook, Daniel L. Lau, Chun Guan
  • Publication number: 20080231861
    Abstract: The invention relates to a polarization maintaining optical delay circuit (1) for providing a time delay to an incident light (S1), comprising an optical directional element (11) adapted for directing an incident light (S1) from a first port (111) to a second port (112) and directing a returning light from the second port to a third port (113), a mirror element (12) adapted for reflecting the incident light (S1), thereby changing the polarization state, so that the returning light (S2) has a substantially orthogonal polarization state compared to the polarization state of the incident light (S1), and an optical waveguide (13) adapted for optically connecting the second port (112) of the optical directional element (11) and the mirror element (12). The invention also relates to a ring cavity (2,3) comprising such an optical delay circuit, and an optical interferometer (4,5) with said optical delay circuit.
    Type: Application
    Filed: August 24, 2005
    Publication date: September 25, 2008
    Applicant: AGILENT TECHNOLOGIES, INC.
    Inventor: Bernd Nebendahl
  • Patent number: 7405857
    Abstract: A light managing screen may provide a rear projection screen, front projection screen or component thereof. The screen may comprise a polymeric composition including a first polymeric material, and a second polymeric material disposed as a plurality of elongated structures within the first polymeric material. Each elongated structure has a major axis and the major axes are substantially aligned. The first polymeric material has an index of refraction that differs by at least 0.01 from an index of refraction of the second polymeric material. In some instances, a pressure sensitive adhesive material is selected as the first polymeric material. The orientation of the elongated structures and the difference in indices of refraction results in the polymeric composition scattering light asymmetrically.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: July 29, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Jiaying Ma, Robert S. Moshrefzadeh, Zhiming Zhou, Albert I. Everaerts
  • Publication number: 20080158641
    Abstract: A backside light unit employs a light valve having an array of individually addressable pixels for illuminating direct view imaging panels.
    Type: Application
    Filed: December 18, 2007
    Publication date: July 3, 2008
    Applicant: Texas Instruments Incorporated
    Inventor: David Foster Lieb
  • Publication number: 20080111927
    Abstract: Aspects of the present invention include a device and system for providing reflective electrochromic switching devices having an optically reflective layer with at least one electrochromic material, a substrate, and an excitation means and controller for transmitting received light in association with transmissivity of the reflective layer at a predetermined time. The devices may be used in an array or system format to provide improved display resolutions in a manner where the devices are fixedly mounted in relation to an emitting light source.
    Type: Application
    Filed: November 9, 2006
    Publication date: May 15, 2008
    Applicant: International Business Machines Corporation
    Inventors: Slavek P. Aksamit, David D. Chudy
  • Patent number: 7372607
    Abstract: The invention includes an apparatus for modulating an optical signal. The apparatus includes a spatial dispersion mechanism and a modulating mechanism. The spatial dispersion mechanism spatially disperses the optical signal. The spatially dispersed optical signal has a plurality of frequency components where each frequency component has an associated beam size. The modulating mechanism includes an array of modulating components where each modulating component has a pitch. The pitch of each modulating component is substantially equal to or less than the beam size of each frequency component.
    Type: Grant
    Filed: October 1, 2005
    Date of Patent: May 13, 2008
    Assignee: Lucent Technologies Inc.
    Inventor: Dan M. Marom
  • Publication number: 20080094683
    Abstract: Light beam splitting and combining system integrate some optic elements into the interfaces of two sets of prisms. Films for reducing stray color beams are coated the interfaces. Two sides of bigger prisms are faced to each other. Another side of each bigger prism is attached to the hypotenuse side of one small prism. A dichroic mirror and PBS are coated on those interfaces. Modulators are parallel to and positioned on the sides of the small prisms and a third side of one bigger prism. Such a system may be applied to a projector.
    Type: Application
    Filed: March 29, 2007
    Publication date: April 24, 2008
    Inventors: Chin-Chung Chen, Shih-Min Wu, Chi-Neng Mo
  • Patent number: 7355780
    Abstract: An interferometric modulator array device with backlighting is disclosed. The interferometric modulator array device comprises a plurality of interferometric modulator elements, wherein each of the interferometric modulator elements comprises an optical cavity. The interferometric modulator array includes an optical aperture region, and at least one reflecting element is positioned so as to receive light passing through the optical aperture region and reflect at least a portion of the received light to the cavities of the interferometric modulator elements. In some embodiments, the interferometric modulator elements may be separated from each other such that an optical aperture region is formed between adjacent interferometric modulator elements.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: April 8, 2008
    Assignee: IDC, LLC
    Inventors: Clarence Chui, Ming-Hau Tung
  • Patent number: 7319553
    Abstract: Disclosed herein is an optical modulator module package structure. In the optical modulator module package structure, an optical modulator device and a drive integrated circuit device are flip-chip bonded to a substrate, and an opening of the substrate is blocked using a piece of glass.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: January 15, 2008
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Suk Kee Hong
  • Patent number: 7295360
    Abstract: A structure includes a substrate and a light modulating film formed on top of the substrate. The light modulating film is made of polycrystalline PLZT containing Pb, Zr, Ti, and La as constituent elements. The film has a La concentration in the range of 5 at % to 30 at %. The relative dielectric constant at a frequency of 1 MHz is higher than or equal to 1200.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: November 13, 2007
    Assignee: Rohm Co., Ltd.
    Inventors: Yoshikazu Fujimori, Takashi Nakamura
  • Patent number: 7292382
    Abstract: A light control unit comprises: a substrate; an insulating film; a first transistor; a reflecting film formed on the insulating film; a light modulating film formed on the reflecting film; a plurality of pairs of electrodes arranged two-dimensionally on the light modulating film; and a polarizing plate formed on a first electrode. Here, the light modulating film is made of a material that varies in refractive index in accordance with the intensity of an electric field applied thereto. For such a material, PLZT containing Pb, Zr, Ti, and La as constituent elements may be used.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: November 6, 2007
    Assignee: Rohm Co., Ltd.
    Inventors: Yoshikazu Fujimori, Ken Nakahara, Takashi Nakamura
  • Patent number: 7280263
    Abstract: A micro-mirror array that is useful, for example, in a reflective spatial light modulator. In one embodiment, the micro mirror array includes spacer support walls, a vertical torsion hinge, and a mirror plate, all being fabricated from a single wafer. The micro-mirror array has a large fill ratio.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: October 9, 2007
    Assignee: Miradia Inc.
    Inventors: Shaoher X Pan, Xiao Yang, Dongmin Chen, Shoucheng Zhang
  • Patent number: 7262898
    Abstract: The invention includes an apparatus for modulating an optical signal. The apparatus includes a modulating mechanism comprising a plurality of modulating component arrays, each modulating component array comprising a plurality of modulating components, wherein adjacent ones of the plurality of modulating components in each modulating component array are separated by gaps, and wherein adjacent ones of the plurality of modulating component arrays are offset along a dispersion direction of an incident optical signal such that the gaps associated with the adjacent ones of the plurality of modulating component arrays are offset. In one embodiment, rows of the modulating components in the modulating component arrays are offset along the dispersion direction of the incident optical signal by a fraction of the modulating component pitch.
    Type: Grant
    Filed: October 1, 2005
    Date of Patent: August 28, 2007
    Assignee: Lucent Technologies Inc.
    Inventors: Dan M. Marom, David Thomas Neilson
  • Patent number: 7207678
    Abstract: Prism elements having TIR surfaces placed in close proximity to the active area of a SLM device to separate unwanted off-state and/or flat-state light from the projection ON-light bundle. The TIR critical angle of these prisms is selected to affect either the off-state light or additionally, any portion of flat-state light reflected from the SLM. To further improve the optical performance of the system, these TIR prisms can be attached directly to the SLM package, completely eliminating the package window.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: April 24, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Steven M. Penn
  • Patent number: 7190504
    Abstract: An electro-optical device is provided comprising an electro-optical material and means for applying an electric field to the electro-optical material, in which a plurality of pixel regions DR, DG and DB capable of separately controlling optical states of the electro-optical material are arranged and each pixel region is provided with a light transmitting portion (an aperture portion (212aR, 212aG, and 212aB)) and a light reflecting portion (a reflective surface (212R, 212G, and 212B)). At adjacent pixel regions that are arranged in a predetermined direction, end edges Ea and Eb of each of the light transmitting portions orthogonal to the predetermined arrangement direction are aligned with each other.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: March 13, 2007
    Assignee: Seiko Epson Corporation
    Inventor: Nobuo Sugiyama
  • Patent number: 7180648
    Abstract: An electro-absorption light intensity modulator device is provided that comprises a first and a second layer disposed relative to the first layer so as to provide a light-absorbing optical confinement region. The first layer comprises a first insulator layer, and the light-absorbing optical confinement region comprises at least one quantum-confined structure. The at least one quantum-confined structure possesses dimensions such, that upon an application of an electric field in the at least one quantum-confined structure, light absorption is at least partially due to a transition of at least one carrier between a valence state and a conduction state of the at least one quantum-confined structure. A method is also provided for fabricating an electro-absorption light intensity modulator device.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: February 20, 2007
    Assignee: Massachusetts Institute of Technology
    Inventors: Carl Dohrman, Saurabh Gupta, Eugene A. Fitzgerald
  • Patent number: 7065300
    Abstract: An improved optical transmitter comprises a vertically lasing semiconductor optical amplifier (VLSOA) coupled to an external modulator and/or a laser source. The VLSOA, external modulator and laser source are discrete devices or alternatively integrated onto a common substrate. The integrated optical transmitter may be fabricated using a number of different methods, including based on selective area epitaxy, impurity induced disordering, etch and fill and silicon optical bench.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: June 20, 2006
    Assignee: Finsiar Corporation
    Inventor: Jeffrey D Walker
  • Patent number: 7057788
    Abstract: A chirp compensation dielectric multilayer film mirror (10) reflects an incident light in a predetermined wavelength range and has group delay characteristics that prevent at least one of the dielectric multilayer film mirror (10) and a light transmission portion from applying a phase disturbance to an incident light within the predetermined wavelength range. Therefore, all the wavelength components of the incident light in the predetermined wavelength range are reflected by the chirp compensation dielectric multilayer-film mirror (10), and no additional undesired phase disturbance occurs by the dielectric multilayer film mirror (10) and the light transmission portion. Accordingly, a spatial light modulator (1) enables a desired modulation only by a liquid crystal layer without giving an additional undesired phase disturbance to an output light.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: June 6, 2006
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Yasushi Ohbayashi, Narihiro Yoshida, Hideo Suzuki, Tsutomu Hara
  • Patent number: 7038752
    Abstract: An optical interference color display comprising a transparent substrate, an inner-front optical diffusion layer, a plurality of first electrodes, a patterned support layer, a plurality of optical films and a plurality of second electrodes is provided. The inner-front optical diffusion layer is on the transparent substrate and the first electrodes are on the inner-front optical diffusion layer. The patterned support layer is on the inner-front optical diffusion layer between the first electrodes. The optical film is on the first electrodes and the second electrodes are positioned over the respective first electrodes. The second electrodes are supported through the patterned support layer. Furthermore, there is an air gap between the second electrodes and their respective first electrodes.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: May 2, 2006
    Assignee: Prime View International Co, LTD
    Inventor: Wen-Jian Lin
  • Patent number: 6898018
    Abstract: In a luminous display element, a retro-reflector is provided on the back side of an organic EL layer which includes an emission layer whose state changes between an emission state and a non-emission state. The retro-reflector includes a corner cube array, and reflects incident light in the same direction as an incident direction. A unit structure of the corner cube array is a form of a triangular pyramid which is made up of rectangular equilateral triangles having three faces, and a light shielding process is performed on the periphery of a base angle of the rectangular equilateral triangle. Thus, it is possible to prevent an image from being reflected, so that it is possible to provide the luminous display element whose contrast ratio and the utilization efficiency of emission are high.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: May 24, 2005
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Minoura, Shun Ueki, Masahiko Tomikawa
  • Patent number: 6891987
    Abstract: A true-time delay feeder for multiple aperture beam steering devices. The feeder comprises a plurality of tunable time delay modules. The tunable time delay modules provide different delays to different beamlets without changing the spectrum of each beamlet. The tunable true-time delay modules provide for temporal synchronization and spatial coherence of the beam front.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: May 10, 2005
    Assignee: HRL Laboratories, LLC
    Inventors: Stanislav I. Ionov, David S. Sumida
  • Patent number: 6867833
    Abstract: The present invention discloses a transflective mode color liquid crystal display, whose white backlight source is composed of several narrowband monochromatic light sources. A color filter for displaying colors is designed to match the wavelength of each of the monochromatic light sources so that the color filter can let a monochromatic light source of one color be transmitted, while selectively absorb the wavelengths of the monochromatic light sources of other colors. The present invention can achieve high color saturation at the backlight mode while maintaining high reflectance.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: March 15, 2005
    Assignee: Giantplus Technology Co., Ltd.
    Inventors: Pin Chang, Alex Lin
  • Patent number: 6865011
    Abstract: An image display has a transparent front sheet with a prismatically microstructured inward surface and a rear sheet substantially parallel to and spaced from the front sheet. An electrophoretic suspension fills the space between the sheets. The suspension is formed by suspending non-light-scattering light absorptive particles in an electrophoresis medium until the particles form a substantially unitary thermodynamically stable agglomeration. Application of a voltage across the suspension establishes an electric field for controllably electrophoretically moving the particle agglomeration as a substantially unitary whole toward the front sheet's inward surface to frustrate total internal reflection at the inward surface of light rays passing through the front sheet.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: March 8, 2005
    Assignee: The University of British Columbia
    Inventors: Lorne A. Whitehead, Michele Ann Mossman
  • Patent number: 6865007
    Abstract: There is provided a complex frequency response filter providing a frequency response having a desired shape. A first complex frequency response filter includes a first and a second reflecting surfaces defining a resonant cavity therebetween. Each of the reflecting surfaces respectively has a predetermined surface finish providing a given reflectivity, therefore providing resonances with a predetermined shaped frequency response of a predetermined amplitude and of a predetermined periodicity. Those frequency responses can then be summed to generate an arbitrarily complex spectral response. In another embodiment, the complex frequency response filter includes a transmission medium and a first and a second reflecting surfaces defining a resonant cavity therebetween.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: March 8, 2005
    Assignee: Dicos Technologies Inc.
    Inventors: Jean-François Cliche, Michel TĂȘtu, Christine Latrasse, Alain Zarka
  • Patent number: 6844956
    Abstract: A reflective display device includes a switching layer, placed between substrates, for switching between a transmissive state for allowing transmission of incident light and a scattering state for scattering the incident light, and a retro-reflector for reflecting an incident ray from the liquid crystal layer so that an outgoing ray of the reflected light is parallel to the incident ray. A pitch of smallest unit structures of the retro-reflector is set to be larger than 0 mm and not more than 5 mm. The retro-reflector is preferably in a form of a corner cube array and has light absorbing surface portions at borders of the smallest unit structures. With this reflective display device, brightness of white state and contrast ratio can be improved.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: January 18, 2005
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Minoura, Shun Ueki, Masahiko Tomikawa, Teiyu Sako, Masayuki Okamoto, Seiichi Mitsui
  • Patent number: 6829073
    Abstract: An optical reading system is described herein which can be used to detect the presence of a biological substance (e.g., cell, drug, chemical compound) on a surface of a grating-based waveguide sensor. In one embodiment, the reading system includes a light source (e.g., laser, diode) for directing a light beam into the grating-based waveguide sensor and a detector (e.g., spectrometer, CCD imaging device) for receiving a reflected light beam from the grating-based waveguide sensor and analyzing the reflected light beam so as to detect a resonant wavelength/angle which corresponds to a predetermined refractive index that indicates whether a biological substance is located on the surface of the grating-based waveguide sensor.
    Type: Grant
    Filed: October 20, 2003
    Date of Patent: December 7, 2004
    Assignee: Corning Incorporated
    Inventors: Mark F. Krol, Garrett A. Piech
  • Publication number: 20040085611
    Abstract: A reflective display device includes a switching layer, placed between substrates, for switching between a transmissive state for allowing transmission of incident light and a scattering state for scattering the incident light, and a retro-reflector for reflecting an incident ray from the liquid crystal layer so that an outgoing ray of the reflected light is parallel to the incident ray. A pitch of smallest unit structures of the retro-reflector is set to be larger than 0 mm and not more than 5 mm. The retro-reflector is preferably in a form of a corner cube array and has light absorbing surface portions at borders of the smallest unit structures. With this reflective display device, brightness of white state and contrast ratio can be improved.
    Type: Application
    Filed: June 30, 2003
    Publication date: May 6, 2004
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Minoura, Shun Ueki, Masahiko Tomikawa, Teiyu Sako, Masayuki Okamoto, Seiichi Mitsui
  • Publication number: 20040004753
    Abstract: A micro-mirror array fabricated on one substrate is bonded to a second substrate that includes addressing electrodes and control circuitry. In one embodiment, the micro mirror array is fabricated from a substrate that is a single crystal material. There is enough area beneath the micro mirror array for electrodes and control circuitry, including memory buffers and a pulse width modulation array to be fabricated on the second substrate.
    Type: Application
    Filed: February 27, 2003
    Publication date: January 8, 2004
    Inventor: Shaoher X. Pan
  • Patent number: 6657766
    Abstract: A reflective display device includes a switching layer, placed between substrates, for switching between a transmissive state for allowing transmission of incident light and a scattering state for scattering the incident light, and a retro-reflector for reflecting an incident ray from the liquid crystal layer so that an outgoing ray of the reflected light is parallel to the incident ray. A pitch of smallest unit structures of the retro-reflector is set to be larger than 0 mm and not more than 5 mm. The retro-reflector is preferably in a form of a corner cube array and has light absorbing surface portions at borders of the smallest unit structures. With this reflective display device, brightness of white state and contrast ratio can be improved.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: December 2, 2003
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Minoura, Shun Ueki, Masahiko Tomikawa, Teiyu Sako, Masayuki Okamoto, Seiichi Mitsui
  • Patent number: 6646782
    Abstract: An all solid-state light valve and tunable filter that uses color-selective absorption at a metal-dielectric interface by surface plasmons. The solid-state surface plasmon light valve and tunable filter comprises a substrate, a bottom electrode, a solid-state electro-optic material, and a top electrode through which electromagnetic radiation may pass through and whose optical properties may be modified by suitable modulation of an electrical bias, i.e., an applied voltage between the top and bottom electrodes. The bottom electrode must be specifically fabricated using a refractory metal to allow the formation of the solid-state electro-optic material.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: November 11, 2003
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Stephen D. Russell, Randy L. Shimabukuro
  • Patent number: 6618204
    Abstract: A light modulator is comprised of two unit devices each using surface plasmon generated at the interface between thin metal films respectively formed on prisms and an electro-optical material, and a mirror. Both of the transmitted light due to absorption and re-radiation, and the reflected light arising from the unit devices are made into the outgoing light, the incident light on the next unit device, or the incident light on the mirror. Consequently, all light beams can be utilized as the final outgoing light beams with no loss of light. Further, the color of light can be spatially divided, and still further, it can also be temporally divided by changing the wavelength due to a voltage. As a result, the original light can be divided both temporally and spatially with almost no loss by combining two unit devices so configured as to re-radiate the absorbed light by surface plasmon using surface plasmon and a mirror, and thus utilizing both of the reflected light and the transmitted light.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: September 9, 2003
    Assignee: NEC Corporation
    Inventor: Ken-ichi Takatori
  • Patent number: 6618027
    Abstract: A light modulator is comprised of two unit devices each using surface plasmon generated at the interface between thin metal films respectively formed on prisms and an electro-optical material, and a mirror. Both of the transmitted light due to absorption and re-radiation, and the reflected light arising from the unit devices are made into the outgoing light, the incident light on the next unit device, or the incident light on the mirror. Consequently, all light beams can be utilized as the final outgoing light beams with no loss of light. Further, the color of light can be spatially divided, and still further, it can also be temporally divided by changing the wavelength due to a voltage. As a result, the original light can be divided both temporally and spatially with almost no loss by combining two unit devices so configured as to re-radiate the absorbed light by surface plasmon using surface plasmon and a mirror, and thus utilizing both of the reflected light and the transmitted light.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: September 9, 2003
    Assignee: NEC Corporation
    Inventor: Ken-ichi Takatori
  • Patent number: 6611367
    Abstract: A surface plasmon optical modulator element includes a dielectric material block disposed so that light-to-be-modulated travels through the interior of the dielectric material block and impinges upon one surface thereof at an angle of total reflection, a metal film formed on the surface of the dielectric material block, a photo-functional film which is formed on the metal film and whose refractive index is changed upon exposure to light, and a modulating light source which projects modulating light onto the photo-functional film. The photo-functional film is formed of dye which contains an electron donor and an electron acceptor so that a photoelectron can be transferred therebetween.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: August 26, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masayuki Naya, Yoshio Inagaki, Yoshihisa Usami
  • Publication number: 20030147115
    Abstract: A substrate for an electrooptical device includes a base 1 in which a plurality of display dots D is formed, an underlayer 4 formed on the base 1, a reflective layer 2 formed on the underlayer 4, and color layers 3r, g, and b formed on the reflective layer 2. The underlayer 4 is provided at regions corresponding to the display dots D but is not provided at regions between the display dots D. In addition, concave areas are provided at the regions between the display dots D, and a light-shielding layer 3k is provided so as to get into the concave areas. Accordingly, the light-shielding layer 3k, and the color layers 3r, g, and b level with each other.
    Type: Application
    Filed: December 3, 2002
    Publication date: August 7, 2003
    Inventors: Keiji Takizawa, Yoshihiro Otagiri, Tomoyuki Nakano, Hideki Kaneko, Mutsumi Matsuo, Toshihiro Otake
  • Patent number: 6580490
    Abstract: A printer (100) able to print in a plurality of output formats depending on width of media (160) loaded in the printer (100) is disclosed. The printer (100) provides high resolution and grayscale imaging capability for monochromatic applications. Illumination optics (11) receive a source light beam, from one or more LEDs, uniformize and polarize the beam and direct the beam through a polarization beamsplitter (50). The polarization beamsplitter (50) directs one polarization state of light to one or more LCD spatial light modulators (52), which modulate the polarization of the polarized beam to provide output exposure energy suitable for image marking on media (160). An optional sensor (234) allows printer (100) to automatically detect the width of a given type of media (160) in order to select from a set of compatible output format. Multiple segments of media (160) at the image plane (150) simultaneously.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: June 17, 2003
    Assignee: Eastman Kodak Company
    Inventors: Victor C. Wong, Badhri Narayan, Sujatha Ramanujan, Dan S. Talbot
  • Patent number: 6535323
    Abstract: The invention relates to a switching device having shorter switching times. The device comprises a switchable layer (3), which is switched between a reflecting and an absorbing state by changing a hydrogen content of the switchable layer (3). Applying a DC voltage on electroconductive layers (11, 13) changes the hydrogen content. These electroconductive layers (11, 13) sandwich a stack of layers comprising the switchable layer (3) and a hydrogen storage layer (9). The hydrogen storage layer comprises essentially the same compounds as the switchable layer (3), viz. LMgHx and preferably GdMgHx. The storage layer may be made thin, leading to relatively short hydrogen transportation times and a relatively fast display. The device may be further improved by applying a scattering foil.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: March 18, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Mark Thomas Johnson, Paul Van Der Sluis, Anna-Maria Janner, Hugo Johan Cornelissen
  • Publication number: 20030025978
    Abstract: A panel display assembly comprises an interface, a display panel, a backlight and a stage. The interface is electrically connected to the display panel and the backlight. The stage contains a lens to magnify the image projecting from the display panel, a reflecting mirror with 45° to the lens to reflect vertically an image from the lens, an eye lens atop the reflecting mirror to magnify an image from the reflecting mirror, and a viewfinder atop the eye lens from which a user can view an image from the eye lens.
    Type: Application
    Filed: July 31, 2001
    Publication date: February 6, 2003
    Inventors: Tzung Yung Yang, Chuang Yen Wu, Qing Zhen Li, Wen-Hao Chou
  • Publication number: 20030021000
    Abstract: To provide a color filter substrate and transflective type electro-optical device capable of ensuring both brightness of reflective display and saturation of transmissive display. Also, to reduce the difference in color between reflective display and transmissive display. A reflective layer 211 having openings 211 a is formed on a substrate 201, and a color filter 212 having colored layers 212r, 212g, and 212b is formed thereupon. Deep color portions 212c are provided to the colored layer, above the openings 211a of the reflective layer 211.
    Type: Application
    Filed: July 12, 2002
    Publication date: January 30, 2003
    Inventors: Keiji Takizawa, Yoshihiro Otagiri
  • Publication number: 20030021001
    Abstract: A vehicle rear vision system includes at least two rearview assemblies each having an image transfer device for transferring images rearwardly of the vehicle in order to be observable by a driver. A rear vision communication system is provided to effect communication between the rearview assemblies. The rear vision communication system also includes a communication link with the vehicle multiplex communication network. The vehicle rear vision system may include an interactive dynamic position control, which repositions each mirror in the system in response to a change in the position of one mirror in a manner which allows the mirror aim to track a driver's eye position.
    Type: Application
    Filed: September 20, 2002
    Publication date: January 30, 2003
    Applicant: Donnelly Corporation
    Inventors: Desmond J. O'Farrell, Roger L. Veldman, Kenneth Schofield
  • Patent number: 6504651
    Abstract: A light modulator is comprised of two unit devices each using surface plasmon generated at the interface between thin metal films respectively formed on prisms and an electro-optical material, and a mirror. Both of the transmitted light due to absorption and re-radiation, and the reflected light arising from the unit devices are made into the outgoing light, the incident light on the next unit device, or the incident light on the mirror. Consequently, all light beams can be utilized as the final outgoing light beams with no loss of light. Further, the color of light can be spatially divided, and still further, it can also be temporally divided by changing the wavelength due to a voltage. As a result, the original light can be divided both temporally and spatially with almost no loss by combining two unit devices so configured as to re-radiate the absorbed light by surface plasmon using surface plasmon and a mirror, and thus utilizing both of the reflected light and the transmitted light.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: January 7, 2003
    Assignee: NEC Corporation
    Inventor: Ken-ichi Takatori
  • Patent number: 6480641
    Abstract: An optical modulator that modulates light through the back side of a flip chip packaged integrated circuit die. In one embodiment, an optical modulator includes a p-n junction having a side wall that is substantially vertical or perpendicular relative to a surface of the integrated circuit die. A charged region is generated at the p-n junction and is modulated in response to an electrical signal of the integrated circuit die. An optical beam is directed through the back side, of the semiconductor substrate and through the charged region along the side wall p-n junction. The optical beam is deflected off a deflector back through the charged region along the side wall back out the back side. In one embodiment, the side wall p-n junction is provided with a metal oxide semiconductor (MOS) gate structure. In another embodiment, the side wall p-n junction is provided by an n− (or p−) well in a p− (or n−) epitaxy layer of the semiconductor substrate.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: November 12, 2002
    Assignee: Intel Corporation
    Inventors: Yi Ding, Mario J. Paniccia, Timothy J. Maloney
  • Publication number: 20020141031
    Abstract: A solid state device used to modulate the intensity of reflected or transmitted light by modulating with an external voltage the optical thickness of a thin film ferroelectric placed in an etalon cavity is disclosed. The device is constructed by selecting a generally planar supporting substrate, preferably silicon or sapphire in order to be compatible with silicon integrated circuits. A dielectric stack consisting of alternating layers of different index of refraction materials, also specifically selected to be compatible with later growth of the thin film ferroelectric, is deposited thereon to form a partially reflective and partially transmitting mirror, followed by a transparent electrically conductive layer. The thin film ferroelectric is deposited on the conductive layer, followed by a second transparent conductive layer and a second dielectric stack. Leads are connected to the conductive layers and in turn to a voltage generator.
    Type: Application
    Filed: January 22, 2002
    Publication date: October 3, 2002
    Applicant: Corning Applied Technologies
    Inventors: Feiling Wang, Gene H. Haertling
  • Patent number: 6441947
    Abstract: An optical beam steerer includes one or more layers of electro-optically active material in which is formed a chirped distributed Bragg reflector. An electric field generated across the electro-optically active material in the direction of propagation of the chirped distributed Bragg reflector causes the index of refraction within the material to change. The electric field varies in a direction normal to the direction of propagation of the chirped distributed Bragg reflector which causes a variation in the local index of refraction proportional to the strength of the electric field. Changes in the index of refraction cause the wavefront of the incident optical beam to experience different delays such that the incident optical beam is reflected out of the beam steerer at an angle that is tangential to the direction of variation of the applied electric field. Two dimensional beam steering is provided by the creation of two electric fields that are orthogonal to each other.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: August 27, 2002
    Assignee: HRL Laboratories, LLC
    Inventor: Stanislav I. Ionov