Light Emitting Diode Patents (Class 348/801)
  • Patent number: 10255852
    Abstract: A comparator unit includes: a comparison section configured to compare a control pulse with an electric potential based on a signal voltage; and a control section configured to control, based on the control pulse, operation and non-operation of the comparison section.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: April 9, 2019
    Assignee: Sony Semiconductor Solutions Corporation
    Inventors: Ken Kikuchi, Takaaki Sugiyama, Takehiro Misonou, Genichiro Oga, Takahiro Kita
  • Patent number: 10073331
    Abstract: An illumination device of the disclosure includes a plurality of light sources and a correction unit. The plurality of light sources generate light having respectively different wavelengths. The correction unit corrects, on the basis of a change in relative luminosity, a light quantity of the light to be generated by at least one light source out of the plurality of light sources, to restrain a change in white balance. The change in the relative luminosity is caused by a change in wavelength associated with a change in temperature.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: September 11, 2018
    Assignee: SONY CORPORATION
    Inventor: Kenta Miyakawa
  • Patent number: 9915413
    Abstract: A light with higher luminance is radiated while lights of a plurality of different wavelengths are appropriately selected and light guiding efficiency is improved. An illumination apparatus including three or more light sources which are arranged so that optical axes of the light sources intersect at one point and which respectively emit lights of different wavelength ranges, an optical device which transmits a light from one of the light sources while reflecting lights from the other light sources so as to make the lights enter an optical path of the light from the one of the light sources, and an optical device rotator which rotates the optical device in a direction in which the light sources are arranged.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: March 13, 2018
    Assignee: OLYMPUS CORPORATION
    Inventor: Koichiro Furuta
  • Patent number: 9697766
    Abstract: A comparator unit includes: a comparison section configured to compare a control pulse with an electric potential based on a signal voltage; and a control section configured to control, based on the control pulse, operation and non-operation of the comparison section.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: July 4, 2017
    Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventors: Ken Kikuchi, Takaaki Sugiyama, Takehiro Misonou, Genichiro Oga, Takahiro Kita
  • Patent number: 9614348
    Abstract: A light source arrangement is provided. The light source arrangement may include a plurality of semiconductor laser light sources, each having an optical axis. The semiconductor laser light sources are arranged in such a way that their optical axes are oriented parallel to one another so that respective laser light emission sides of the semiconductor laser light sources point in the same spatial direction. The light source arrangement may further include a deflection unit configured to collect and influence beam paths of the laser light emitted by the semiconductor laser light sources in order to form a beam bundle. The semiconductor laser light sources are arranged on a surface of a carrier, distributed at least two-dimensionally over the surface.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: April 4, 2017
    Assignee: Osram GmbH
    Inventors: Martin Daniels, Ulrich Hartwig, Joerg Sorg
  • Patent number: 8866839
    Abstract: A signal adapting chromacity system to control that may include a signal conversion engine to receive a source signal designating a color of light defined by a two spatial plus luminance dimensional color space, such as the xxY color space. The signal conversion engine may convert the source signal to a three dimensional color space defined within a subset gamut of a full color gamut, such as an RGW, RBW, or GBW color space. The subset gamut may include a first color light, a second color light and a high efficacy light. The signal conversion engine may perform a conversion operation to convert the source signal to an output signal, using the output signal to drive light emitting diodes (LEDs). The conversion operation may be a matrix, angular or linear conversion operation.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: October 21, 2014
    Assignee: Lighting Science Group Corporation
    Inventors: Fredric S. Maxik, Robert R. Soler, David E. Bartine, Ran Zhou, Valerie A. Bastien, Matthew Regan, Eliza Katar Grove, Eric Bretschneider
  • Patent number: 8830407
    Abstract: A display device includes a display component, a light source, a light guide plate, a spacer member, and a biasing member. The display component displays images. The light source emits light. The light guide plate guides the light emitted from the light source to the display component. The light guide plate has a light incident face on which the light emitted from the light source is directly incident. The spacer member is disposed in a region other than where the light guide plate and the light source are opposite each other such that the spacer member maintains a specific spacing between the light source and the light incident face of the light guide plate. The biasing member is arranged to bias one of the light source and the light guide plate towards the other of the light source and the light guide plate.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: September 9, 2014
    Assignee: Funai Electric Co., Ltd.
    Inventors: Hiromasa Sasaoka, Yuto Suzuki, Akifumi Kono
  • Patent number: 8810736
    Abstract: A display device includes a matrix of pixel elements and a matrix of photo-detecting elements. The display device also includes an interface port accessible from the outside of the display device and configured to output a representation of a position of an invisible light spot on the display screen generated from an invisible light beam projected thereon with a spreading angle less than 20 degrees. The position of the invisible light spot is determined based on measurement from the photodetectors in the matrix of photo-detecting elements.
    Type: Grant
    Filed: July 24, 2011
    Date of Patent: August 19, 2014
    Inventor: Nongqiang Fan
  • Patent number: 8780281
    Abstract: According to one embodiment, an electronic apparatus comprises a housing with a display, a printed wiring board, and a lens. The housing comprises a side surface with an opening. The printed wiring board positioned in the housing along with a light-emitting portion on the printed wiring board. The lens is situated adjacent to the printed wiring board and comprises a light guide configured to guide light from a plurality of light-receiving portions to the opening.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: July 15, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuhiro Nakamura, Toshikatsu Nakamura, Daisuke Maehara, Kohei Wada
  • Publication number: 20140132848
    Abstract: A backlight device 24 of the present invention includes: a chassis 22 that has a bottom plate 22a, and a side wall 22b that rises on the front side of the bottom plate 22a from an edge of the bottom plate 22a; a light guide plate 20 that has a light-receiving face 20a, a light-exiting surface 20b, and an opposite surface 20c, and that is arranged such that the opposite surface 20c faces the surface of the bottom plate 22a; an LED substrate 30 that is arranged on the surface the bottom plate 22a and that abuts the side wall 22b; an LED light source 28 arranged on a front face of the LED substrate 30; a frame 14 arranged above the light-exiting surface 20b of the light guide plate 20; a first inclined portion 31 that is provided on the frame 14 and that inclines from the light guide plate 20 side towards the side wall 22b and from the bottom plate 22a side towards the light-exiting surface 20b; and a first abutting portion 41 that is arranged on the LED substrate 30 and that has a least a portion thereof abutti
    Type: Application
    Filed: July 13, 2012
    Publication date: May 15, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Hirokazu Mouri
  • Publication number: 20140036161
    Abstract: A circular LED light guide includes a top wall and a peripheral side wall; the top wall and the peripheral side wall cooperatively form a hollow receiving space. The hollow receiving space is used for receiving an LED therein. The top wall includes a light incident surface inside of the receiving space, and an exterior light output surface. The light incident surface includes a concave lens surface formed in a central area of the light incident surface, and the light output surface includes a convex lens surface formed in a central area of the light output surface. A central optical axis of the concave lens surface is aligned with a central optical axis of the convex lens surface. An LED module and a direct-type LED TV using the LED light guide are also provided.
    Type: Application
    Filed: December 12, 2012
    Publication date: February 6, 2014
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: I-THUN LIN
  • Patent number: 8552089
    Abstract: There is provided an ink composition for forming a light shielding film in an organic semiconductor device which is capable of stably forming a fine pattern when forming a finely patterned light shielding film by the letterpress reverse printing method or microcontact printing method, which can be baked at a temperature equal to or less than the substrate heatproof temperature, and which is also capable of providing light shielding property and mechanical strength, the ink composition for forming a light shielding film in an organic semiconductor device which is an ink composition for forming a light shielding film in an organic semiconductor device comprising a black pigment; a resin component; a surface energy modifier; a quick-drying organic solvent; a slow-drying organic solvent; and a mold releasing agent, wherein the resin component comprises a solid resin that is in a solid state at 200° C. or less and a liquid resin that is in a liquid state at 10 to 50° C. at a ratio (solid resin/liquid resin) of 0.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: October 8, 2013
    Assignee: DIC Corporation
    Inventors: Hideki Etori, Hiroshi Isozumi, Masanori Kasai
  • Patent number: 8547391
    Abstract: A signal adapting chromacity system to control that may include a signal conversion engine to receive a source signal designating a color of light defined by a two spatial plus luminance dimensional color space, such as the xxY color space. The signal conversion engine may convert the source signal to a three dimensional color space defined within a subset gamut of a full color gamut, such as an RGW, RBW, or GBW color space. The subset gamut may include a first color light, a second color light and a high efficacy light. The signal conversion engine may perform a conversion operation to convert the source signal to an output signal, using the output signal to drive light emitting diodes (LEDs). The conversion operation may be a matrix, angular or linear conversion operation.
    Type: Grant
    Filed: May 15, 2011
    Date of Patent: October 1, 2013
    Assignee: Lighting Science Group Corporation
    Inventors: Fredric S. Maxik, Robert R. Soler, David E. Bartine, Ran Zhou, Valerie A. Bastien, Matthew Regan, Eliza Katar Grove, Eric Bretschneider
  • Publication number: 20130235281
    Abstract: A video display system includes an electroacoustic device secured within a housing. A plurality of modules is operatively associated with the housing and is arranged to form a display area, each of the modules including at least one light source. The modules cooperatively display light to display at least one of video and images.
    Type: Application
    Filed: July 6, 2012
    Publication date: September 12, 2013
    Inventor: Adam DAVIS
  • Patent number: 8531613
    Abstract: The method includes (1) measuring with a matrix of photo-detecting elements on the television screen a position of an invisible laser spot on a television screen projected thereon from an invisible laser beam generated by a laser device on a television remote control; and (2) transmitting from the television to a computer a representation of the position of the invisible laser spot on the television screen.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: September 10, 2013
    Inventor: Nongqiang Fan
  • Patent number: 8471943
    Abstract: Provided is a stacked organic light-emitting device in which organic compound layers for respective emission colors are capable of separately emitting light. The stacked organic light-emitting device includes a first organic compound layer, a second organic compound layer, and a third organic compound layer, which have emission colors different from each other. The first organic compound layer is provided on one side of a common transparent electrode, and the second organic compound layer and the third organic compound layer are provided on another side thereof. The first organic compound layer has a polarity direction opposite to polarity directions of the second organic compound layer and the third organic compound layer.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: June 25, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoyuki Ito, Nobutaka Mizuno, Naoto Nakamura, Masami Iseki
  • Publication number: 20120229713
    Abstract: According to one embodiment, an electronic apparatus comprises a housing with a display, a printed wiring board, and a lens. The housing comprises a side surface with an opening. The printed wiring board positioned in the housing along with a light-emitting portion on the printed wiring board. The lens is situated adjacent to the printed wiring board and comprises a light guide configured to guide light from a plurality of light-receiving portions to the opening.
    Type: Application
    Filed: May 25, 2012
    Publication date: September 13, 2012
    Inventors: Kazuhiro Nakamura, Toshikatsu Nakamura, Daisuke Maehara, Kohei Wada
  • Patent number: 8218094
    Abstract: According to one embodiment, a television apparatus includes, a printed wiring board provided with a cutout portion, a plurality of first light emitting diodes provided on the printed wiring board and configured to emit light parallel to the printed wiring board, and a lens. The lens includes a plurality of light receiving parts fitted in the cutout portion in such a manner as to correspond to the first light emitting diodes, respectively, and a display part configured to display the light which has entered through the light receiving parts.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: July 10, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuhiro Nakamura, Toshikatsu Nakamura, Daisuke Maehara, Kohei Wada
  • Patent number: 8154669
    Abstract: A system includes a light source, a driving module and a processing unit. The light source includes a red, green and blue light emitting diodes. The driving module is electrically coupled to the red, green and blue light emitting diodes. The driving module is for controlling a driving current outputted to each of the red, green and blue light emitting diodes. The processing unit is communicatively coupled to the driving module. The processing unit receives a video signal containing display information which is inputted into a display screen and is to be displayed thereon. The processing unit analyzes the video signal and determines color temperature of the display information, and outputs a first controlling signal to the driving module for synchronously adjusting the color temperature of the light emitted from the light source to be substantially equal to that of the display information displayed on the display screen.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: April 10, 2012
    Assignee: Foxsemicon Integrated Technology, Inc.
    Inventors: Chun-Wei Wang, Chih-Ming Lai
  • Publication number: 20110310311
    Abstract: According to one embodiment, a television apparatus includes, a printed wiring board provided with a cutout portion, a plurality of first light emitting diodes provided on the printed wiring board and configured to emit light parallel to the printed wiring board, and a lens. The lens includes a plurality of light receiving parts fitted in the cutout portion in such a manner as to correspond to the first light emitting diodes, respectively, and a display part configured to display the light which has entered through the light receiving parts.
    Type: Application
    Filed: April 7, 2011
    Publication date: December 22, 2011
    Inventors: Kazuhiro Nakamura, Toshikatsu Nakamura, Daisuke Maehara, Kohei Wada
  • Publication number: 20110216250
    Abstract: A display device comprises: a first substrate; LED light sources mounted on the first substrate; a backlight unit comprising a side surface on which light emitted from the LED light sources is incident and a back surface from which light is emitted in a direction different from the direction of the light incident on the side surface; and a panel disposed on the backlight unit and displaying a video image, wherein at least the first and second LED light sources adjacent to each other, among the LED light sources on the first substrate, are controlled differently from the other LED light sources on the first substrate based on the video image.
    Type: Application
    Filed: February 2, 2011
    Publication date: September 8, 2011
    Inventor: Jaedoo SIM
  • Publication number: 20110157492
    Abstract: There is provided a surface light source using white light emitting diodes including: a plurality of white light emitting diodes arranged at a predetermined distance from one another, wherein the white light emitting diodes are arranged such that a light emitting diode unit defined by each of the white light emitting diodes and corresponding ones of the white light emitting diodes disposed at a closest distance from the each white light emitting diode has a central light amount ranging from 80% to 120% with respect to an average light amount of the white light emitting diodes.
    Type: Application
    Filed: March 11, 2011
    Publication date: June 30, 2011
    Applicant: SAMSUNG LED CO., LTD.
    Inventors: Jae Hong SHIN, Hun Joo HAHM, Hyung Suk KIM, Chang Ho SHIN, Dae Yeon KIM, Chul Hee YOO, Dong Hyun CHO
  • Publication number: 20110140840
    Abstract: An identity of a person proximate to a display device is determined by an identity profile controller. The identity profile controller determines whether a configured viewing profile exists for the person. Upon determining that the configured viewing profile exists for the person, the identity profile controller instructs a bezel display controller to display a profile identifier associated with the configured viewing profile via a two-dimensional light-emitting diode (LED) array located within a bezel of the display device outside of the display area of the display. The identity profile controller automatically adjusts display device settings for the display device based upon the configured viewing profile. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
    Type: Application
    Filed: December 11, 2009
    Publication date: June 16, 2011
    Inventors: Robert L. Hardacker, Steven Richman, Rafael Calderon, Fred J. Zustak
  • Patent number: 7940236
    Abstract: A passive matrix, electro-luminescent display system has a passive matrix, electro-luminescent display having an orthogonally oriented array of column and row electrodes and an electro-luminescent layer located between the electrodes at the intersection of each column and row electrode forming an individual light-emitting element. Drivers provide separate signals at different times to different groups of row electrodes within the array of row electrodes; wherein the row electrodes of each group simultaneously receive at least two different level signals. A display driver receives and processes the input image signal to provide a presharpened image control signal. Column drivers respond to the presharpened image control signal for simultaneously providing a signal to the multiple column electrodes within the array of column electrodes at the same time signals are provided to the groups of row electrodes so that the concurrence of row and column signals causes individual light-emitting element to produce light.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: May 10, 2011
    Assignee: Global OLED Technology LLC
    Inventors: Michael E. Miller, John F. Hamilton, Jr., Andrew D. Arnold
  • Patent number: 7920109
    Abstract: A system on panel (SOP)-type emission driving device of an organic light emitting display device. The emission driving device includes an odd emission control line controller having a plurality of flip-flops for outputting emission control signals to odd emission control lines, and an even line controller having a plurality of flip-flops for outputting emission control signals to even emission control lines. Each of the flip-flops alternately receives a clock signal and an inverted clock signal for causing the flip-flip to output an emission control signal. In one embodiment, each flip-flop includes nine PMOS transistors and two capacitors.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: April 5, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventor: Bo-Yong Chung
  • Publication number: 20100289971
    Abstract: A system and method for customizing the look of footwear. The footwear of the system includes a display that can show high resolution images and covers a large portion of the footwear surface. A user can create and transfer designs to be displayed. Designs can be bought or shared over the Internet. The system also allows the user to use a handheld device to detect the color of another object and then display substantially the same color in pixels of the display.
    Type: Application
    Filed: May 13, 2009
    Publication date: November 18, 2010
    Inventors: David Odland, Kathryn Odland
  • Patent number: 7832870
    Abstract: According to one embodiment, a projection system includes a color wheel operable to filter light into a passed component and a reflected component. The projection system also includes a digital micromirror device comprising a plurality of micromirrors each operable to receive the passed component and the reflected component. Each micromirror is selectively positionable to direct, at approximately the same time, the passed component and the reflected component to desired locations. The projection system also includes an optical system operable to direct the passed component and the reflected component from the color wheel to the digital micromirror device at approximately the same time.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: November 16, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory S. Pettitt, Andrew I. Russell, Bradley W. Walker
  • Publication number: 20100265417
    Abstract: The present invention relates to a display arrangement comprising display means (304) and receiving and/or transmitting means for radio waves, millimeter waves or microwaves. An electrically conductive structure (6A) is adapted to form said receiving and/or transmitting means. The display means (3O4) comprises an emission layer with a number of light emitting elements or pixel elements (531, . . . , 535). The electrically conductive structure (6A) is provided between said light emitting elements (531, . . . , 535) to form said receiving and/or transmitting means such that they are integrated with the display means (3O4). Light conducting means (731, . . . , 735) are provided to conduct light through the electrically conductive structure (6A) to represent imaging information on top of the display means.
    Type: Application
    Filed: December 6, 2007
    Publication date: October 21, 2010
    Inventors: Fredrik Harrysson, Jonas Medbo
  • Patent number: 7576719
    Abstract: A display capable of displaying multi-color space and including a display unit, a control circuit, and a light source is provided. The control circuit is electrically connected to the display unit and the light source respectively. In addition, the light source is controlled by the control circuit to switch between different illumination modes, such that the display is capable of displaying multi-color space with different specifications, for example, sRGB, NTSC, SMPTE, PAL, etc.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: August 18, 2009
    Assignee: Industrial Technology Research Institute
    Inventor: Jih-Fon Huang
  • Publication number: 20090174825
    Abstract: An OLED display includes a display panel having a display area and a pad area, a first bezel receiving the display panel, and a second bezel combined with the first bezel along a display panel side where the pad area is formed.
    Type: Application
    Filed: January 9, 2009
    Publication date: July 9, 2009
    Inventors: Dong-Su Yee, Dai-Han Cho, Jung-Ho Hwang, Chan-Kyoung Moon, Hyun-Hee Lee, Min-Su Kim, Chan-Hee Wang, Kwang-Jin Yun
  • Patent number: 7554604
    Abstract: The present invention relates to a method for simulating the scenes of image signals, which comparing different image signals in alternation time to decide the emitting type and the emitting conversion of a light-emitting device so as to accomplish simulating the scenes of the image signals.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: June 30, 2009
    Assignee: Compal Electronics, Inc.
    Inventors: Jyh-Chyang Tzou, Chih-Peng Ma
  • Publication number: 20090161030
    Abstract: A system includes a light source, a driving module and a processing unit. The light source includes a red, green and blue light emitting diodes. The driving module is electrically coupled to the red, green and blue light emitting diodes. The driving module is for controlling a driving current outputted to each of the red, green and blue light emitting diodes. The processing unit is communicatively coupled to the driving module. The processing unit receives a video signal containing display information which is inputted into a display screen and is to be displayed thereon. The processing unit analyzes the video signal and determines color temperature of the display information, and outputs a first controlling signal to the driving module for synchronously adjusting the color temperature of the light emitted from the light source to be substantially equal to that of the display information displayed on the display screen.
    Type: Application
    Filed: April 28, 2008
    Publication date: June 25, 2009
    Applicant: FOXSEMICON INTEGRATED TECHNOLOGY, INC.
    Inventors: CHUN-WEI WANG, CHIH-MING LAI
  • Patent number: 7510284
    Abstract: Described herein are display devices that provide projection-type video output and use redundant sets of lasers to generate light. The laser set produces a desired amount of light, e.g., for a primary color. A redundant laser set includes more lasers than that needed to produce the desired amount of light. For example, a set of six lasers may only need five lasers to generate and emit a desired amount of light. The sixth laser allows failure of one laser in the set to not compromise operability of the entire set—and the display device. In addition, extra lasers in a laser set also allows the lasers to be cycled for heat purposes and to extend longevity of individual lasers in the set.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: March 31, 2009
    Inventor: William J. Plut
  • Patent number: 7452087
    Abstract: An illumination apparatus illuminating an objective illumination region comprises a plurality of illuminants having light-emitting surfaces radiating diffused light, an illuminant substrate in which the illuminants are disposed so as to be set in array on the circumference, at least one optical member configured to guide the diffused light to the objective illumination region, a movable section configured to drive the optical member so as to be rotatable around the center of the circumference serving as a rotation center, and a lighting control section configured to control a light-emitting timing of the plurality of illuminants. The movable section and the lighting control section operate together such that the quantity of light per unit time of the diffused light guided to the objective illumination region is within a predetermined range.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: November 18, 2008
    Assignee: Olympus Corporation
    Inventor: Shinichi Imade
  • Patent number: 7436113
    Abstract: An OLED display having at least first, second, and third differently colored pixels includes a first light emitting layer provided over a substrate for the first and second pixels and a second light emitting layer provided over the substrate for the third pixel wherein the first and second light emitting layers produce light having different spectra and the light produced by the first light emitting layer has substantial spectral components corresponding to the light output desired for the first and second pixels, and the light produced by the second light emitting layer has substantial spectral components corresponding to the light output desired for the third pixel, and first and second color filters in operative relationship with the first and second pixels.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: October 14, 2008
    Assignee: Eastman Kodak Company
    Inventor: Jeffrey P. Spindler
  • Patent number: 7410264
    Abstract: A technique is provided that improves the usage ratio of light in the illumination optical system of an image display apparatus, in which the cross-sectional size or shape of the flux of light that has formed a light source image of an LED-based light-emitting section is converted by anamorphic optics, such as collimator lens, into a size or shape appropriate for an aperture in the portion that permits the flux of the light source image to pass through, in an optical system leading to an image display element(s), and thus the quantity of fluxes of light passed through the aperture is increased.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: August 12, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Futoshi Yamasaki, Masahiko Yatsu
  • Patent number: 7401925
    Abstract: An image projector system includes an LED controller and first and second LEDs, a dichroic mirror. The LED controller controls the first and the second LED to emit first and second color lights, respectively. The second color light is of high luminance and is decomposed by a dichroic mirror into third and forth color lights having luminance close to that of the first color light. Each color light is guided through a light valves to adjust the spectral transmittance of the color light. A light-combining device, such as an x-cube, receives and combines the first color light, the third color light, and the forth color light, to form light images, and transmits the images to a display through a projector lens.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: July 22, 2008
    Assignee: Asia Optical Co., Inc.
    Inventor: Chien-feng Lu
  • Patent number: 7400345
    Abstract: A method for uniformly aging an OLED display device, the OLED display device including a display screen with a screen aspect ratio, the method comprising: receiving a first external video signal having a first signal aspect ratio different from the screen aspect ratio; illuminating a primary region of the OLED display in response to the first external video signal, whereby a secondary region of the OLED display is not illuminated in response to the first external video signal; receiving a second external video signal having a second signal aspect ratio different from the first external video signal aspect ratio, wherein the display area corresponding to the second signal aspect ratio includes at least a portion of each of the primary and of the secondary regions of the OLED display; generating a regional correction value corresponding to the primary and secondary regions of the OLED display; employing the regional correction value to correct the second external video signal to compensate for differential agin
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: July 15, 2008
    Assignee: Eastman Kodak Company
    Inventor: Ronald S. Cok
  • Patent number: 7396136
    Abstract: An illumination unit includes a first heat conducting plate and a plurality of light source modules to emit a plurality of lights having different colors, each light source module having at least one LED mounted on the first heat conducting plate and at least one corresponding collimator to collimate the lights emitted from the at least one LED.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: July 8, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Su-gun Kim, Dan-sik Kim, Ki-boon Seong, Kye-boon Lee
  • Patent number: 7387389
    Abstract: An image display device includes an image processing unit, a light source assembly, an optical modulator assembly, and a projection lens assembly. The image processing unit is configured to receive a video signal and generate image data and control signals. The light source assembly and optical modulator assembly are each controlled by the control signals such that the light source assembly generates illumination in a spatial distribution pattern that is coupled to optical modular assembly via a homogenizing device. The projection lens assembly is configured to project an image from the optical modulator assembly onto a viewing surface. The optical modular assembly is configured to maximize the amount of illumination coupled from the light source assembly, and includes at least one optical modulator surface configured to have a substantially 1:1 aspect ratio.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: June 17, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Anurag Gupta, David L. Erickson, Scott A Lerner
  • Patent number: 7384153
    Abstract: A light source device is provided comprising: a light-emitting element; a support member having the light-emitting element flip chip mounted thereto; and a thermally conductive filling agent between the light-emitting element and the support member. By injecting the filling agent between the light-emitting element and the support member, the thermal conduction is supplemented by the filling agent. As such, heat generated by the light-emitting element can be efficiently removed outside the light source device.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: June 10, 2008
    Assignee: Seiko Epson Corporation
    Inventor: Norio Nakamura
  • Patent number: 7377657
    Abstract: An image presentation device (100) includes a set of color light sources (122, 124, 126) and a micro-display panel (150) capable of operating in both image processing and non-image processing modes. A sensor (170) is coupled to the micro-display device (150) to convert light received from the light source (122, 124, 126) into a signal value representing the output from the light source (122, 124, 126). A controller (110), responsive to the signal value, selectively and/or collectively varies the input to each of the individual light sources (122, 124, 125) to provide for consistent operating performance over the life of the product.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: May 27, 2008
    Assignee: Jabil Circuit, Inc.
    Inventors: Israel J. Morejon, Robert J. Pantalone, Chandrika Sugrim, Patrick J. Verdon, Toon Diels
  • Patent number: 7325932
    Abstract: The object is to provide a display device that is capable of displaying an image with high luminance and a wide color reproduction range under simple control. The display device includes a light source device that emits first to fourth illumination lights, a spatial light modulator that modulates the illumination lights, and a controller. The controller allows the first and the second illumination lights to time-sequentially enter an identical illumination area of the spatial light modulator, and allows the third and the fourth illumination lights to individually enter the spatial light modulator so as to avoid them from being superimposed on the first and the second illumination lights.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: February 5, 2008
    Assignee: Seiko Epson Corporation
    Inventor: Hidefumi Sakata
  • Patent number: 7318646
    Abstract: A system for projecting a virtual image within an observer's field of view comprises a support element, a transparent element mounted on the support element and suitable for being placed in front of the observer's eyes, the transparent element comprising a first face and a second face, an image display device suitable for forming an additional image, and a projection and focusing device for projecting the additional image in a manner such as to present it superimposed on the image of the outside world. The display device comprise light-emitting devices disposed on one of the faces of the transparent element, and the projection and focusing device comprise optical elements associated with respective emitting devices and arranged on the other face. Each of the optical elements creates a virtual image of the emitting device associated therewith. The virtual images of the emitting devices together form the additional image.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: January 15, 2008
    Assignee: CRF Societa Consortile per Azioni
    Inventors: Stefano Bernard, Piermario Repetto, Pietro Perlo, Nereo Pallaro, Davide Capello, Nello Li Pira, Vito Lambertini, Mauro Brignone
  • Publication number: 20080002070
    Abstract: A method of driving an OLED display having a plurality of light-emitting display elements having outputs that change with time or use, comprising the steps of: a) providing an external image signal with a first image aspect ratio; b) providing an OLED display having light-emitting display elements formed in a two-dimensional array having a second display aspect ratio different from the first image aspect ratio; c) driving all of the two-dimensional array of display elements with a composite signal comprising the external image signal and an internal aging signal, wherein a subset of the display elements is driven by the external image signal and the remainder of the display elements that are not driven by the external image signal are driven with the internal aging signal; and d) changing the location of the subset of display elements within the two-dimensional array driven by the external image signal over time.
    Type: Application
    Filed: August 15, 2006
    Publication date: January 3, 2008
    Inventor: Ronald S. Cok
  • Patent number: 7303288
    Abstract: Aspects of the invention can provide an image display device that can include light sources provided, respectively, for regions obtained by dividing an image forming region of an electro-optic modulator into plural regions to irradiate corresponding regions, and a light source control portion that performs lighting control on the light sources. The light source control portion can perform the lighting control on the light sources for the respective region independently in sync with writing of image data to the electro-optic modulator, and the lighting control can be performed in such a manner that the light source corresponding to at least one region among the plural regions is kept unlit in a writing period for a screenful of image data.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: December 4, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Yasunaga Miyazawa, Takashi Takeda, Yoshitaka Ito, Hideki Kojima
  • Patent number: 7293880
    Abstract: Aspects of the invention can provide a light source that can reduce the optical system in size while enlarging a color reproducible range and achieving higher luminance. The system can include a cross dichroic prism to combine an R light, a G1 light, a G2 light, and a B light, and an LED R to generate the R light, an LED G1 to generate the G1 light, an LED G2 to generate the G2 light, and an LED B, disposed near the LED G2 to be side by side, to generate the B light, as well as a control portion to drive these LED R, LED G1, LED G2, and LED B under control. The peak wavelengths of the G2 light and the B light are adjacent to each other, and the control portion can drive the LED G2 and the LED B under its control by switching in time division.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: November 13, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Hidefumi Sakata, Masatoshi Yonekubo
  • Patent number: 7234823
    Abstract: An illumination apparatus illuminating an objective illumination region comprises a plurality of illuminants having light-emitting surfaces radiating diffused light, an illuminant substrate in which the illuminants are disposed so as to be set in array on the circumference, at least one optical member configured to guide the diffused light to the objective illumination region, a movable section configured to drive the optical member so as to be rotatable around the center of the circumference serving as a rotation center, and a lighting control section configured to control a light-emitting timing of the plurality of illuminants. The movable section and the lighting control section operate together such that the quantity of light per unit time of the diffused light guided to the objective illumination region is within a predetermined range.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: June 26, 2007
    Assignee: Olympus Corporation
    Inventor: Shinichi Imade
  • Patent number: 7232224
    Abstract: According to one embodiment of the present invention, a method for color illumination for an image display system includes field sequentially operating an array of emitters to generate a sequence of light beams. Each light beam includes one color. A first light beam of a first color is combined with a second light beam of a second color. The first and second light beams are combined in an optical path to travel concurrently. The combination of the first and second light beams results in a composite color coordinate. The combination of the first and second light beams are directed at a spatial light modulator operable to receive the combination and produce a desired color on a display.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: June 19, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Steven M. Penn
  • Patent number: 7230657
    Abstract: Tools for directing a collection of light emitting devices toward pixel locations to make an image are disclosed. A pixel location is a light emitting device target at least twice during a given frame, and each light emitting device in the collection is directed toward at least two different pixel locations during the frame. Adjacent light emitting devices may be directed toward adjacent pixel locations or toward nonadjacent pixel locations.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: June 12, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Winthrop D. Childers, William J. Allen, Thomas B. Pritchard