With Photoconductive Layer (e.g., Spatial Light Modulator(slms)) Patents (Class 349/25)
  • Patent number: 10403857
    Abstract: The present invention provides a circularly polarizing plate that makes it possible to realize a bendable display device having reduced reflectivity and reflective tint and has excellent bending resistance, and a display device including a circularly polarizing plate. The circularly polarizing plate of the present invention is a circularly polarizing plate used for a bendable display device and includes a polarizer, and a phase difference film that is arranged on one side of the polarizer. The phase difference film includes a ?/2 plate and a ?/4 plate, the ?/2 plate and the ?/4 plate each include a liquid crystal compound, and a slow axis direction of the phase difference film is adjusted to define an angle of 75 to 105 degrees with respect to a bending direction of the display device.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: September 3, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Akira Maruyama, Yuta Takahashi
  • Patent number: 10371875
    Abstract: A display device may include a substrate and a plurality of color conversion units on the substrate. Each of the plurality of color conversion units may include a photonic crystal layer having at least two layers having different refractive indices alternately stacked, and a wavelength shifter dispersed in at least one of the at least two layers.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: August 6, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dong Uk Kim, Min Ki Nam, Hae Il Park, Jun Han Lee
  • Patent number: 10324335
    Abstract: According to one embodiment, a display device includes a display panel including a first substrate, a second substrate, and an optical element layer provided between the substrates, a light directing unit facing the first substrate of the display panel, and including a first main surface disposed on a side facing the first substrate, and a second main surface disposed on a side reverse to the first main surface, and a light source unit disposed on the first substrate side with respect to the display panel, and emitting polarized light toward the first or second main surface. The polarized light is made incident on the first or second main surface, and directed perpendicularly to the optical element layer.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: June 18, 2019
    Assignee: Japan Display Inc.
    Inventors: Youichi Asakawa, Toshihiko Fukuma, Ken Onoda, Shinichi Komura
  • Patent number: 10296114
    Abstract: A touch screen display apparatus including a sensor unit to sense and to process light signals and a pixel unit to drive pixels according to the light signal processing performed by the sensor unit. The touch screen display apparatus includes a substrate; a plurality of pixel units disposed on the substrate, wherein each of the pixel units includes a first electrode, a second electrode, and an emission layer interposed between the first electrode and the second electrode; and a plurality of sensor units disposed on the substrate, wherein each of the sensor units includes a sensor first electrode, a sensor second electrode, and an organic light receiving layer interposed between the sensor first electrode and the sensor second electrode.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: May 21, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Moon-Jae Lee, Won-Jun Song, Sun-Hee Lee, Young-Hee Lee, Mu-Hyun Kim, Hye-Dong Kim, Ji-Young Kim
  • Patent number: 10139616
    Abstract: A display element comprising a configurable medium for providing a display effect. The display element is for example an electrowetting element having a first fluid and a second fluid. A first support plate comprises a first support plate surface in contact with at least one of the first fluid or the second fluid, and an electrode. In some examples, an optical structure comprises a first absorbent element and a second absorbent element, with a transmissive layer located therebetween. In other examples, an optical structure comprises a plurality of light conduits.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: November 27, 2018
    Assignee: Amazon Technologies, Inc.
    Inventors: Karel Johannes Gerhardus Hinnen, Tulasi Sridhar Reddy Guntaka
  • Patent number: 9964800
    Abstract: A novel display device that is highly convenient or reliable. The display device includes a first display element, a second display element, a color film, and a reflective electrode. The first display element includes a first pixel electrode and a liquid crystal layer. The second display element includes a second pixel electrode and a light-emitting layer. The first pixel electrode is electrically connected to the reflective electrode. The reflective electrode includes an opening through which light emitted from the light-emitting layer passes. The color film faces the reflective electrode with the liquid crystal layer placed therebetween.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: May 8, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Masataka Nakada, Takayuki Cho, Daisuke Kubota
  • Patent number: 9841614
    Abstract: An eye-mountable device includes a flexible lens enclosure, anterior and posterior flexible conductive electrodes, and an accommodation actuator element. The flexible lens enclosure includes anterior and posterior layers that are sealed together. The anterior flexible conductive electrode is disposed within the flexible enclosure and across a center region of the flexible lens enclosure on a concave side of the anterior layer. The posterior flexible conductive electrode is disposed within the flexible enclosure and across the center region on a convex side of the posterior layer. The accommodation actuator element is disposed between the first and second flexible conductive electrodes. The anterior and posterior flexible conductive electrodes are transparent and electrically manipulate the accommodation actuator element.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: December 12, 2017
    Assignee: Verily Life Sciences LLC
    Inventors: Jeffrey G. Linhardt, Zenghe Liu, Scott B. Kennedy
  • Patent number: 9785016
    Abstract: The present invention discloses a liquid crystal grating, a manufacturing method and a drive method thereof, and an optical phased array. In the liquid crystal grating, plurality of first electrodes are formed on a lower substrate with first gaps formed between adjacent first electrodes, second electrodes are further provided above the first gaps with second gaps formed between adjacent second electrodes, and an insulation layer is provided between the first electrodes and the second electrodes. When voltages are applied to the first electrodes and the second electrodes, continuously and smoothly changing electric field is generated inside the liquid crystal grating, and then phases of incident light may be controlled continuously and smoothly, which improves the ability of the liquid crystal grating to modulate light beam.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: October 10, 2017
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Shiming Shi, Ling Shi, Tao Sun, Yunfei Li
  • Patent number: 9599827
    Abstract: A 3D display device and LC barrier are disclosed. The 3D display device comprises a non-polarized light display unit and an LC barrier. The LC barrier comprises a liquid crystal cell arranged at one side of the non-polarized light display unit, and the liquid crystal cell comprises an upper substrate, a lower substrate and a cholesteric liquid crystal layer between the substrates; a first quarter-wave plate provided on the upper substrate; a polarizer provided on the first quarter-wave plate; an absorption axis of the polarizer forms a predetermined angle with a fast axis of the first quarter-wave plate.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: March 21, 2017
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Wenbo Li, Yanbing Wu
  • Patent number: 9148555
    Abstract: An image pickup apparatus includes: a polarization removing element layer including a plurality of polarization removing elements, each of the plurality of polarization removing elements being configured to polarize an incident light to thereby obtain light having a polarization axis in a predetermined direction and to transmit the polarized light; a polarizer layer provided in front of the polarization removing element layer, the polarizer layer being configured to twist polarization axes of light having a plurality of polarization axes by predetermined angles, respectively, and to transmit the light; an inclination detecting device configured to detect inclination of the incident light to an optical axis; a controller configured to control and drive the polarizer layer such that the polarizer layer twists the polarization axis of light depending on the inclination detected by the inclination detecting device and transmits the light; and an image pickup device configured to detect the light.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: September 29, 2015
    Assignee: Sony Corporation
    Inventor: Masanori Iwasaki
  • Patent number: 9105228
    Abstract: An organic light emitting diode (OLED) display device and a method for driving an OLED display panel are provided. The method includes the following steps. In a reset period, a plurality of scanning signals received by a plurality of pixels of the OLED display panel is simultaneously enabled, and a plurality of data-voltages received by the pixels are set to a reference-voltage. In a threshold voltage cancelling period, a system-high-voltage received by the pixels and the scanning signals are simultaneously enabled, and the data-voltages are set to the reference-voltage. In a scanning period, the scanning signals are sequentially enabled, and the data-voltages are set according to the corresponded displaying data within a plurality of displaying data.
    Type: Grant
    Filed: September 3, 2012
    Date of Patent: August 11, 2015
    Assignee: Au Optronics Corporation
    Inventors: Chien-Ya Lee, Tsung-Ting Tsai
  • Patent number: 8982292
    Abstract: A spatial light modulator comprising an array-type liquid crystal panel, a polarization beam splitter, an oblique wave plate and a converging lens. The polarization beam splitter is orientated to direct a source light towards a reflective planar surface of the array-type liquid crystal panel. The oblique wave plate and converging lens are located between the polarization beam splitter and the array-type liquid crystal panel. The converging lens is configured to direct light from the reflective planar surface onto a facing surface of the polarization beam splitter.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: March 17, 2015
    Assignee: Alcatel Lucent
    Inventors: Gang Chen, Mihaela Dinu, Roland Ryf
  • Patent number: 8836906
    Abstract: An object is to provide a display device which has high visibility and has a touch recognition function with a high degree of accuracy, by combining a liquid crystal layer where liquid crystals are dispersed in a polymer and a light emitting element. In a display device using a liquid crystal layer where liquid crystals are dispersed in a polymer, a light-transmitting spacer is provided so as to overlap with a light receiving element which has a touch recognition function. The light-transmitting spacer can prevent light incident on the light receiving element from being dispersed by the liquid crystals, while maintaining a cell gap in the liquid crystal layer, and thus achieve a touch recognition function with a high degree of accuracy with high visibility.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: September 16, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda, Tetsuji Ishitani
  • Patent number: 8767134
    Abstract: A photoconductive switching element includes a first electrode, a second electrode that is arranged so as to face the first electrode, and a photoconductive layer that is arranged between the first electrode and the second electrode and realizes conductivity by receiving light. The photoconductive layer includes a first electric charge generating layer and a second electric charge generating layer that generate electric charge when light is received and an electric charge transport layer which is brought into contact with the first electric charge generating layer and the second electric charge generating layer and to which the electric charge can be moved. The first electric charge generating layer and the second electric charge generating layer are arranged at mutually-different positions in a direction perpendicular to a thickness direction of the electric charge transport layer and at mutually-different positions in the thickness direction of the electric charge transport layer.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: July 1, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Taisuke Yamauchi
  • Publication number: 20140168546
    Abstract: An automatic-darkening filter 10, 10? that comprises a first polarizer 14, a second polarizer 18, a first liquid-crystal cell 16, and a sensor 64. The first polarizer 14 has a first polarization direction, and the second polarizer 18 has a second polarization direction. The liquid crystal cell 16 is disposed between the first and second polarizers 14, 18 and contains first and second optically-transparent, flexible, glass layers 40 and 42 with the liquid crystal layer 48 being located between these layers. The sensor 64 detects incident light and causes a signal to be sent, which causes molecular rotation within the liquid crystal layer. The inventive automatic-darkening filter is beneficial in that overall product weight can be reduced and the view field can be increased.
    Type: Application
    Filed: December 13, 2012
    Publication date: June 19, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Kristina M. Magnusson, Britton G. Billingsley, Kenneth Jarefors, Larissa Zuravskaja, Joy L. Manske
  • Patent number: 8736778
    Abstract: An optically addressed light valve suitable for selectively limiting the transmission of radiation from high intensity light sources comprising an electro-optical modulator sandwiched by two photoconductive layers.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: May 27, 2014
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Nothern Ireland
    Inventor: Christopher David Burgess
  • Patent number: 8710358
    Abstract: Example embodiments relate to a solar cell configured to scatter incident light to be penetrated so as to increase a light progress path and includes a polymer-dispersed liquid crystal (PDLC) layer on at least one of a first and a second electrodes.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: April 29, 2014
    Assignee: Samsung Electronics, Co. Ltd.
    Inventors: Gae-hwang Lee, Kyu-young Hwang, Jae-eun Jung
  • Publication number: 20140104664
    Abstract: Provided are an optically addressable spatial light modulator (OASLM) divided into a plurality of segments, and an apparatus and method for displaying a holographic three-dimensional (3D) image using the OASLM. The holographic 3D image display apparatus includes a first light source which emits a write beam, an electric addressable spatial light modulator (EASLM) which modulates the write beam emitted from the first light source according to hologram information regarding a 3D image, a second light source which emits a read beam, an OASLM which receives the write beam modulated by the EASLM and modulates the read beam emitted from the second light source according to hologram information included in the modulated write beam, a scanning optical unit which projects the write beam modulated by the EASLM onto the OASLM, and a Fourier lens which focuses the read beam modulated by the OASLM onto a predetermined space to form the 3D image.
    Type: Application
    Filed: April 8, 2013
    Publication date: April 17, 2014
    Applicants: CAMBRIDGE ENTERPRISE LIMITED, SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hong-seok LEE, Neil COLLINGS, Daping CHU, Hoon SONG, William Alden CROSSLAND, Jhen Si CHEN
  • Publication number: 20140036177
    Abstract: The present invention provides a method for manufacturing liquid crystal display module with photovoltaic cell, which includes: (1) providing a substrate and a liquid crystal display panel; (2) forming a transparent conductive layer on the substrate through sputtering; (3) forming a first matrix, which is arranged to stay away from a pixel aperture of the liquid crystal display panel and is located below the TFT arrays; (4) forming a photovoltaic layer on the transparent conductive layer through chemical vapor deposition; (5) forming a second matrix corresponding to the first matrix; (6) forming a metal layer on the photovoltaic layer through sputtering; (7) forming a third matrix corresponding to the second matrix so as to form a photovoltaic cell on the substrate; (8) applying sealant to the substrate around the photovoltaic cell; and (9) bonding the substrate and the liquid crystal display panel to each other and curing the sealant.
    Type: Application
    Filed: August 10, 2012
    Publication date: February 6, 2014
    Applicant: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Xindi Zhang
  • Publication number: 20140022474
    Abstract: A spatial light modulation device includes a liquid crystal layer modulating a phase of incident light according to a level of an applied electric field, a temperature sensor generating a temperature signal corresponding to a temperature of the liquid crystal layer, a plurality of pixel electrodes provided for each of a plurality of pixels and applying a voltage to the liquid crystal layer, and a driving device providing a voltage to the plurality of pixel electrodes. The driving device has a nonvolatile storage element storing in advance a coefficient ? included in a function expressing a correlation between a temperature change amount in the liquid crystal layer and a variation in phase modulation amount in the liquid crystal layer, and performs a calculation for correcting a level of voltage by use of a temperature indicated by the temperature signal and the coefficient ?.
    Type: Application
    Filed: February 10, 2012
    Publication date: January 23, 2014
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Tomoko Otsu, Naoya Matsumoto, Yuu Takiguchi
  • Patent number: 8559096
    Abstract: Various reflective display pixels are provided. In one embodiment, among others, a reflective display pixel for modulating the return of incident visible light is provided that includes one or more stacked cells. Each cell includes a fluid containing a light absorbing medium capable of absorbing incident light in at least one specified wavelength band for that cell and a light returning medium capable of selectively returning at least a portion of the light within the specified wavelength band for that cell. In other embodiments, each cell includes a fluid containing a light absorbing medium capable of absorbing incident light in at least one specified wavelength band for that cell and a light returning medium capable of selectively returning at least a portion of visible light outside the specified wavelength band for that cell.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: October 15, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Gary Gibson, Stephen Kitson, Adrian Geisow
  • Patent number: 8525943
    Abstract: An optically addressed light valve suitable for selectively limiting the transmission of radiation from high intensity light sources independent of wavelength using a TN liquid crystal cell and a photoconductive material (vanadium doped silicon carbide).
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: September 3, 2013
    Assignee: The Secretary of State for Defence in Her Brittanic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: Christopher David Burgess
  • Patent number: 8488074
    Abstract: A display medium comprises: a pair of electrodes to which a voltage is applied; and a liquid crystal layer stack provided between the pair of electrodes. The liquid crystal layer stack contains a first liquid crystal layer having a first liquid crystal that undergoes transition into a specific alignment state in response to the voltage applied to the electrodes becoming equal to or greater than a first voltage value, and a second liquid crystal layer having a second liquid crystal that undergoes transition into the specific alignment state in response to the voltage becoming equal to or greater than a second voltage value. The second voltage value is greater than the first voltage value, and the second liquid crystal has a higher isotropic phase transition temperature than the first liquid crystal.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: July 16, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Naoki Hiji, Chikara Manabe, Takeo Kakinuma, Tadayoshi Ozaki
  • Patent number: 8416351
    Abstract: A liquid crystal display screen includes a resistance-type touch panel and a liquid crystal display panel. The touch panel includes a first electrode plate and a second electrode plate opposite to the first electrode plate. The first electrode plate includes a first substrate and a first transparent conductive layer located on the first substrate. The second electrode plate includes a common substrate and a second transparent conductive layer. The liquid crystal display panel includes an upper optical polarizer, an upper substrate, an upper electrode, an upper alignment layer, a liquid crystal layer, a lower alignment layer, a thin film transistor panel, and a lower optical polarizer, from top to bottom in sequence. The upper substrate is the same with the common substrate. The upper optical polarizer is sandwiched between the second transparent conductive layer and the common substrate.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: April 9, 2013
    Assignee: Beijing FUNATE Innovation Technology Co., Ltd.
    Inventors: Liang Liu, Chen Feng, Li Qian
  • Patent number: 8390749
    Abstract: A spatial light modulator 100 comprising an array-type liquid crystal panel 115, a polarization beam splitter 120, an oblique wave plate 130 and a converging lens 135. The polarization beam splitter is orientated to direct a source light 125 towards a reflective planar surface 127 of the array-type liquid crystal panel. The oblique wave plate and converging lens are located between the polarization beam splitter and the array-type liquid crystal panel. The converging lens is configured to direct light from the reflective planar surface onto a facing surface 125 of the polarization beam splitter.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: March 5, 2013
    Assignee: Alcatel Lucent
    Inventors: Gang Chen, Mihaela Dinu, Roland Ryf
  • Patent number: 8384633
    Abstract: An optical writing display apparatus that performs: applying to a pair of electrodes a first voltage having a first polarity that applies a first partial voltage to a cholesteric liquid crystal layer, the first partial voltage being more than a threshold at which the state of the cholesteric liquid crystal layer changes from focal conic to homeotropic when the exposure is conducted, and exposing an photoconductive layer to light; stopping applying the first voltage for a predetermined time and exposing the photoconductive layer to light; applying a second voltage having a second polarity opposite to the first polarity that applies a second partial voltage to the cholesteric liquid crystal layer, the second partial voltage being not more than the above threshold when the exposure is not conducted, but more than the above threshold when the exposure is conducted; and selectively exposing the photoconductive layer to light and stopping applying the second voltage.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: February 26, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuhiro Yamaguchi, Tomozumi Uesaka
  • Patent number: 8373810
    Abstract: A micro-array of optical vortex retarders is provided by forming an alignment layer having a plurality of discrete alignment patches with different orientations. A layer of birefringent material, including one of a liquid crystal and a liquid crystal polymer precursor material, is provided adjacent to the alignment layer. The aligning orientation and position of each discrete alignment patch in the plurality of discrete alignment patches is selected to induce the layer of birefringent material to form at least one optical vortex retarder adjacent to a substantially non-oriented region of the alignment layer.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: February 12, 2013
    Assignee: JDS Uniphase Corporation
    Inventors: David M. Shemo, Scott McEldowney
  • Patent number: 8366275
    Abstract: Image display apparatus (102) comprising projector means (112), a light source (104), at least one primary modulator (106) for modulating light, an auxiliary modulator (110) for modulating the light modulated by the primary modulator (106), optical means (108) for relaying the light modulated by the primary modulator (106) to the auxiliary modulator (110), and control means (118, 120) for controlling the primary modulator (106) and the auxiliary modulator (110), characterized in that: the primary modulator (106) comprises a first array of pixels, and the auxiliary modulator (110) comprises a second array of pixels; each pixel in the first array of pixels of the primary modulator (106) is controlled by the control means (118, 120) as a function of video input data for each pixel in the first array of pixels; and each pixel in the second array of pixels of the auxiliary modulator (110) is controlled by control means (118, 120) as a function of video input data for each equivalent pixel in the second array of pi
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: February 5, 2013
    Assignee: Rockwell Collins UK Limited
    Inventors: John Robert Harding, Geoffrey Howard Blackham, Phillip John Scarfield
  • Patent number: 8325283
    Abstract: A recording device includes: a voltage application unit that applies a voltage exceeding a first threshold value to a display medium; a photosensitive layer in which an impedance changes depending on an irradiated light; and a light irradiation unit that irradiates light of a first intensity that changes the impedance of the display medium at the approximately same time as when the voltage is applied by the voltage application unit and, and when the voltage is no longer applied by the voltage application unit, irradiates light that has a second intensity lower than the first intensity and that damps the residual voltage to the second threshold value or below within a length of time equal to or less than the third threshold value.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: December 4, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Atsushi Hirano, Taijyu Gan, Haruo Harada, Takashi Morikawa, Chisato Urano, Yasunori Okano, Hiroshi Arisawa
  • Patent number: 8310607
    Abstract: A liquid crystal spatial light modulator for adjusting an optical signal is configured in such a manner that a region of one element is partitioned into two regions so as to perform intensity modulation in one region and phase modulation in the other region. Since the region for performing the intensity modulation and the region for performing the phase modulation can be formed by partitioning one region of the liquid crystal spatial light modulator, only one element allows adjusting functions, both the optical signal intensity modulation and phase modulation.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: November 13, 2012
    Assignee: Citizen Holdings Co., Ltd.
    Inventor: Masafumi Ide
  • Patent number: 8305505
    Abstract: An optically based transport system and method for transporting particles across a virtual electrode array are disclosed. The system comprises a photoconductor layer where optically induced electrodes are projected thereon through sequential light images in a traveling wave grid pattern in order to transport particles across the virtual electrode array with a traveling wave.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: November 6, 2012
    Assignees: Palo Alto Research Center Incorporated, Xerox Corporation
    Inventors: Meng H. Lean, Shu Chang, Patrick Y. Maeda, Jeng Ping Lu
  • Patent number: 8226241
    Abstract: An image projector having one or more broadband lasers designed to reduce the appearance of speckle in the projected image via wavelength diversification. In one embodiment, a broadband laser has an active optical element and a nonlinear optical element, both located inside a laser cavity. The broadband laser generates an output spectrum characterized by a spectral spread of about 10 nm and having a plurality of spectral lines corresponding to different spatial modes of the cavity. Different individual spectral lines effectively produce independent speckle configurations, which become intensity-superimposed in the projected image, thereby causing a corresponding speckle-contrast reduction.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: July 24, 2012
    Assignee: Alcatel Lucent
    Inventors: Gang Chen, Roland Ryf
  • Patent number: 8220939
    Abstract: A screen device of the present invention has a light collecting element array including a plurality of light collecting elements that collect incident light from a projector and a back surface sheet. The back surface sheet includes a first electrode plate, a second electrode plate, a photoconductive layer disposed between the first electrode plate and the second electrode plate, and an image recording layer disposed between the first electrode plate and the photoconductive layer. At the back surface sheet, a light reflecting portion is formed at a light collecting region to which the light collected by the light collecting elements is irradiated, and a light absorbing portion is formed at a non-light collecting region to which the light collected by the light collecting elements is not irradiated.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: July 17, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Naoki Hiji, Takeo Kakinuma, Chikara Manabe, Tadayoshi Ozaki
  • Patent number: 8194197
    Abstract: A display device includes a first layer having an optically active display portion, a second layer including a photovoltaic element, and a third layer including electronics operatively coupled to the first layer, wherein the electronics are configured to drive the optically active display portion. Further, the second layer is arranged between the first and third layers.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: June 5, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Allan Evans, Stephen Day, Sunay Shah, Patrick Zebedee, Lesley Parry-Jones, Gareth Nicholas
  • Patent number: 8184218
    Abstract: An electromagnetic source has an electrode structure coupled to a substrate. The electrode structure has interspaced electrodes, at least one of which is spiral-shaped. At least one electrical contact interconnects the electrodes of the electrode structure. The electrode structure is responsive to an applied electrical current to generate a spatially non-uniform magnetic field. This field can act on a LC layer such that optical properties of the layer are controllable.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: May 22, 2012
    Assignee: LensVector Inc.
    Inventors: Tigran Galstian, Karen Asatryan, Amir Tork, Vladimir Presniakov, Armen Zohrabyan, Aram Babramyan
  • Patent number: 8179484
    Abstract: The present invention provides a display medium which prevents a decrease in reflectance during storage at high temperatures, and a writing apparatus using the display medium. A photoconductive layer 24, a selective light transmission layer 22, and a liquid crystal layer 20 are laminated between substrates 12 and 14, which have electrodes 16 and 18, respectively, to form a display medium 10. The selective light transmission layer 22 as a color layer is composed of a deionized material. The ion concentration of the selective light transmission layer 22 is controlled to be within a predetermined range.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: May 15, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hideo Kobayashi, Masaaki Araki, Takehito Hikichi, Takeo Kakinuma, Naoki Hiji, Chikara Manabe, Motohiko Sakamaki, Hiroe Okuyama, Shigeru Yamamoto
  • Publication number: 20120113338
    Abstract: In a liquid crystal display device having a plurality of retardation films for alleviating a deterioration in display quality depending on a viewing angle direction, and a driving liquid crystal layer selected from the group consisting of a driving liquid crystal layer typified by a VA mode wherein a liquid crystal molecule in a driving liquid crystal medium is aligned perpendicular to a substrate when no electric field is applied, a driving liquid crystal layer typified by an IPS mode wherein a liquid crystal molecule in a driving liquid crystal medium is aligned parallel to the substrate when no electric field is applied, and a driving liquid crystal layer that shows optical isotropy when no voltage is applied, a retardation film of a positive A-plate formed of a liquid crystalline polyimide having a photoreactive group is used as at least one layer of the plurality of retardation films.
    Type: Application
    Filed: June 30, 2010
    Publication date: May 10, 2012
    Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATION
    Inventors: Kazuhiko Saigusa, Norio Tamura
  • Patent number: 8174630
    Abstract: A reflective liquid crystal display panel capable of performing data programming and/or data erasing via a polarized light is provided. The reflective liquid crystal display panel includes a first substrate, a second substrate, a liquid crystal layer, a transflective film, a retarder and a polarizer. The second substrate is disposed over the first substrate. The liquid crystal layer is located between the first substrate and the second substrate and an optical aligned material is doped in the liquid crystal layer. The transflective film is disposed below the first substrate, and the transflective film allows the polarized light to pass through, so that the orientation of the optical aligned material doped liquid crystal layer can be controlled by the polarized light. The transflective film reflects external light source. The retarder is disposed between the transflective film and the first substrate. The polarizer is disposed on the second substrate.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: May 8, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Wei-Ting Hsu, Tsung-Hsien Lin, Hsing-Lung Wang, Chi-Chang Liao
  • Publication number: 20120099035
    Abstract: An optically addressed light valve suitable for selectively limiting the transmission of radiation from high intensity light sources independent of wavelength using a TN liquid crystal cell and a photoconductive material (vanadium doped silicon carbide).
    Type: Application
    Filed: July 15, 2010
    Publication date: April 26, 2012
    Applicant: THE SECRETARY OF STATE FOR DEFENCE
    Inventor: Christopher David Burgess
  • Patent number: 8149192
    Abstract: There is provided an optical writing image forming device including: a positioning section positioning an optically written display medium including a pair of electrodes with at least one of which formed by a group of plural sub-electrodes, a display layer, and a photoconductor layer; a display layer initialization section applying an initialization voltage between the pair of electrodes and irradiating initialization light over the entire region of the photoconductor layer; an optical writing section; a head position identification section; and a writing information erasing section, based on information identified by the head position identification section, erasing in a time-series writing information in the display layer corresponding to the group of the plural sub-electrodes by selecting the sub-electrodes in sequence so that an image writing head does not obstruct light emitted from the initialization light source while the image writing head light source is being returned to a standby position.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: April 3, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tsutomu Ishii, Yasunori Saito, Shigehiko Sasaki, Masahiro Sato, Akira Ichiboshi, Kyotaro Tomoda
  • Patent number: 8149252
    Abstract: A display uses x illuminator systems to produce x primary colors and y overlap colors, which are combinations of primary colors, to illuminate a spatial light modulator in a display system. A first set of n duty cycles for the x primary colors over a frame is provided, wherein the display system can select any one of the duty cycles to produce a desired white point. A second set of n duty cycles of x+y colors over a frame corresponding to the first set of duty cycles is determined, where the second set of duty cycles are generated responsive to a specified desired allocation of the frame to the y overlap colors, such that each of the overlap colors can be displayed from a dark shade to a bright shade while maintaining a constant color point.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: April 3, 2012
    Assignee: Texas Instruments Incorporated
    Inventor: Todd Alan Clatanoff
  • Patent number: 8130332
    Abstract: A liquid crystal spatial light modulator for adjusting an optical signal is configured in such a manner that a region of one element is partitioned into two regions so as to perform intensity modulation in one region and phase modulation in the other region. Since the region for performing the intensity modulation and the region for performing the phase modulation can be formed by partitioning one region of the liquid crystal spatial light modulator, only one element allows adjusting functions, both the optical signal intensity modulation and phase modulation.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: March 6, 2012
    Assignee: Citizen Holdings Co., Ltd.
    Inventor: Masafumi Ide
  • Patent number: 8120719
    Abstract: A photo-addressable display medium is provided, the photo-addressable display medium including: a pair of electrodes having transparency; a photoconductive layer disposed between the pair of electrodes and having a laminated structure of a first charge generation layer, a charge transport layer and a second charge generation layer in this order from an exposing light irradiation side; and a liquid crystal layer disposed between an electrode of the inverse side to the exposing light irradiation side and the second charge generation layer and having memory performance, wherein the first charge generation layer and the second charge generation layer contain a phthalocyanine compound, and the charge transport layer contains a stilbene compound represented by the following formula (1): wherein, R1 to R4 each independently represents a hydrogen atom, a methyl group or an ethyl group.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: February 21, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Mieko Seki, Hiroe Okuyama, Yasuhiro Yamaguchi, Tomozumi Uesaka, Hideo Kobayashi
  • Publication number: 20120038841
    Abstract: A solar powered variable light attenuating device includes a liquid crystal cell, a photovoltaic cell in electrical communication with the liquid crystal cell, and a light concentrator having a light absorbing surface and a light emitting surface optically coupled to the photovoltaic cell. At least a portion of light impinging on the light absorbing surface of the light concentrator is concentrated and directed through the light emitting surface to a photon-absorbing portion of the photovoltaic cell to generate a voltage. The generated voltage is used to change the liquid crystal cell from a de-energized state to an energized state in response to sunlight directed toward the photovoltaic cell.
    Type: Application
    Filed: April 26, 2010
    Publication date: February 16, 2012
    Applicant: ALPHAMICRON, INC.
    Inventors: Bahman Taheri, Tamas Kosa, Christine Martincic, Volodymyr Bodnar
  • Patent number: 8115776
    Abstract: A mechanism for mitigating undesired color image breakup artifacts arising in display systems that exploit the principle of field sequential color generation. By suitably reducing the time interval during which image information strikes the moving retina, such that the differential position for the respective red, green, and blue components of the image falling upon the moving retina does not exceed the diameter of a retinal cone or rod, the cause of the breakup is negated and the image becomes unitary as expected: the eye sees the image as if all the components arrived at the same time. The truncation of light emission into shorter time frames necessitates a compensatory increase in imaging light intensity, such that the net amount of photonic flux striking the retina, averaged over time, remains unchanged. The mechanism can be applied to systems with discrete red, green, and blue sources as well as to color-wheel-based systems.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: February 14, 2012
    Assignee: Rambus Inc.
    Inventors: Martin G. Selbrede, Rick Zemen
  • Patent number: 8077185
    Abstract: A system and method for displaying video images in response to each frame of field-sequential video signals. The system comprises a backlight comprising first, second and third primary color light sources. The backlight is operable to emit light for at most 5.67 milliseconds of each frame (on-time), and to emit no light during the remainder of each frame (off-time). During a portion of the on-time, at least two of the primary color light sources are on simultaneously. For another portion of the on-time, the primary color light sources are on sequentially.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: December 13, 2011
    Assignee: Rambus Inc.
    Inventors: Martin G. Selbrede, Rick Zemen
  • Patent number: 8059222
    Abstract: An active matrix substrate in which variations in output characteristics of photodiodes are reduced, and a display device using this active matrix substrate, are provided. An active matrix substrate (1) having an n-TFT (20), a p-TFT (30), and a photodiode (10) is used. The photodiode (10) includes a p-layer (7), an i-layer (8), and an n-layer (9). The i-layer (8) includes a p-type semiconductor region (8a) at a position adjacent to the player (7), said p-type semiconductor region (8a) having a diffusion concentration of p-type impurities that is set at the same level as that of a diffusion concentration of p-type impurities in the channel region (23) of the n-TFT (20); and an n-type semiconductor region (8b) at a position adjacent to the n-layer (9), said n-type semiconductor region (8b) having a diffusion concentration of n-type impurities that is set at the same level as that of a diffusion concentration of n-type impurities in the channel region (33) of the p-TFT (30).
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: November 15, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiromi Katoh, Benjamin James Hadwen
  • Patent number: RE43608
    Abstract: A spatial light modulator imaging system comprises an electrically addressed spatial light modulator (EASLM 4, 30) whose optical image output is projected onto different areas of an optically addressed spatial light modulator (OASLM, 6, 8, 31) in a sequence. The OASLM carries electrodes which allow separate areas to be selectively addressed by application of a voltage whilst receiving light from the EASLM. The combined output from all areas of the OASLM forms a visible image to an observer (11). When illuminated by coherent light the OASLM may produce a holographic image, otherwise incoherent light is used to provide a two dimensional image. The OASLM in one example contains a layer of nematic liquid crystal material between two cell walls both treated with an alignment layer providing low tilt surface alignment that is parallel in opposite direction; the product of layer thickness d and material birefringence ?n approximately equals one quarter of the wavelength ? of read light (12, 37).
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: August 28, 2012
    Assignee: F. Poszat HU, LLC
    Inventors: Jonathan R Hughes, Richard J Miller
  • Patent number: RE43642
    Abstract: A reflective type liquid crystal optically addressed spatial light modulator has a first transparent substrate (1b), a first transparent electrode (2b) formed on the first transparent substrate (1b) and a photosensitive layer (3) formed on the first transparent electrode, formed from materials including hydrogenated amorphous silicon carbide (a-Si:C:H). A read-out light-blocking layer (4) is formed on top of the photosensor layer (3) and is formed from amorphous hydrogenated carbon (a-C:H). The high reflectance dielectric multilayer mirror (5) is formed on top of the light-blocking layer (4) and can be made of alternating the a-Si:C:H layers with a higher refractive index and the a-C:H layers with lower reflective index. The modulator also has a second transparent substrate (1a), a second transparent electrode (2a) formed on the second transparent substrate (1a), and a liquid crystal layer (8) disposed between the dielectric mirror (5) and the second transparent electrode (2a).
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: September 11, 2012
    Assignee: F. Poszat HU, LLC
    Inventors: Nikolai Alexandrovich Feoktistov, Arkady Pavlovich Onokhov, Svetlana Aronovna Onokhova, legal representative, Elena Anatolievna Konshina
  • Patent number: RE44301
    Abstract: The present invention relates, in one aspect to an image replication system comprising a light guide (2), a light source (8) arranged to direct emitted light into the first end (2a) of a light guide (2), a reflective spatial light modulator (6) and focussing means (16). In a preferred embodiment, the light guide (2) is in the form of an elongate glass rod having first and second parallel polygonal end faces (2a, 2b) which are parallel to the long axis of the rod, the rod having a uniform polygonal cross section along its length. The spatial light modulator (6) is optically coupled to the second end face (2b) of the light guide (2) and the focussing means (16) is arranged to receive light reflected back through the rod from the spatial light modulator (6), whereby to form multiple images of said spatial light modulator in an image plane (18).
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: June 18, 2013
    Assignee: F. Poszat Hu, L.L.C.
    Inventors: Mark Anthony Gleeson Smith, Richard Jonathan Miller, Maurice Stanley