Color Filter Patents (Class 353/84)
  • Patent number: 10429658
    Abstract: An illumination system includes a first light source providing a first color beam, a first beam-splitting element which disposes on a transmission path of the first color beam and separates the first color beam into a first sub-beam and a second sub-beam, an optical wavelength conversion element which receives the first sub-beam and converts the first sub-beam into a second color beam and reflects the second color beam back to the first beam-splitting element, a second light source providing a third color beam, and a second beam-splitting element which is located between the second light source and the first beam-splitting element to reflect the second sub-beam. The third color beam passes through the second beam-splitting element and is transmitted to the first beam-splitting element. The second sub-beam, the second color beam and the third color beam are combined into an illumination beam.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: October 1, 2019
    Assignee: Coretronic Corporation
    Inventors: Chien-Chung Liao, Jui Chang
  • Patent number: 10371937
    Abstract: A projection display apparatus (1) includes a wavelength conversion element (11) that converts a wavelength of light from a light source, a driver (13) that rotates the wavelength conversion element, and an internal power supply (15) that stores power in advance and to be used for an operation of the projection display apparatus after a supply of power from an external power supply is cut off, and the driver rotates the wavelength conversion element at the predetermined number of rotations per unit time by using the power of the internal power supply.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: August 6, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinya Ohara, Tetsuya Kagawa
  • Patent number: 10365553
    Abstract: Provided is a luminescent wheel for a projector, which has a novel structure in which a phosphor layer is hard to break even if its thickness is reduced; a manufacturing method therefor; and a light emitting device for a projector. A luminescent wheel for a projector includes: a phosphor layer (11) which has a first principal surface (11a) and a second principal surface (11b) located on an opposite side to the first principal surface (11a) and is capable of being excited by the entry of excitation light to emit fluorescence; a first glass layer (12) provided on the first principal surface (11a) of the phosphor layer (11); and a second glass layer (13) provided on the second principal surface (11b) of the phosphor layer (11).
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: July 30, 2019
    Assignee: NIPPON ELECTRIC GLASS CO., LTD.
    Inventors: Tamio Ando, Tadahito Furuyama, Shunsuke Fujita
  • Patent number: 10241384
    Abstract: A wavelength conversion element includes a wavelength conversion layer which has a first face on which an excitation light is incident and a second face facing the first face, a first layer which is provided facing the second face and contains a first inorganic oxide, a second layer which is provided facing the first layer, contains either silver or aluminum, and reflects the excitation light or a light obtained by wavelength conversion of the excitation light by the wavelength conversion layer, a third layer which is provided facing the second layer and contains a first metal other than silver or aluminum, a fourth layer which is provided facing the third layer and contains the first inorganic oxide or a second inorganic oxide that is different from the first inorganic oxide, and a fifth layer which is provided facing the fourth layer and contains a metal.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: March 26, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kunihiko Takagi, Ayumu Kobayashi, Tomohiro Yokoo
  • Patent number: 10203072
    Abstract: A light module for providing light includes an excitation radiation source which is adapted to emit excitation radiation, at least one first phosphor which is adapted to at least partially convert the incident excitation radiation into conversion light and to generate with this conversion light a first light path, and a phosphor apparatus having a segmentation which has at least two different types of segments, with the segments of the first type comprising the first phosphor. The light module is designed for a periodic movement between an excitation beam that is coming from the excitation radiation source and is incident on the phosphor apparatus and the segmentation, in which there is at least one phase per period in which more than two segments are at least partially irradiated simultaneously by the excitation radiation.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: February 12, 2019
    Assignee: OSRAM GmbH
    Inventor: Juergen Mueller
  • Patent number: 10197788
    Abstract: A projector includes a color wheel module and an optical engine. The color wheel module includes a rotation device, a mount, a color wheel, and an optical sensor. The color wheel is fixed on a rotary part of the rotation device. The rotation device and the optical sensor are fixed on the mount. The mount has an anti-dust structure includes a curved surface that is opposite to a rotary surface of the rotary part and extends in a rotation direction of the rotary part. The curved surface and the optical sensor are arranged sequentially in the rotation direction. Either by shortening a distance between the curved surface and the rotary surface or by a guiding slot that is disposed beside or lower than the curved surface, dust deposited on the optical sensor can be reduced effectively.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: February 5, 2019
    Assignees: Qisda Optronics (Suzhou) Co., Ltd., Qisda Corporation
    Inventors: Li-Yen Hsu, Tsung-Hsun Wu, Ying-Fang Lin, Wen-Chung Ho, Chi-Hung Hsiao
  • Patent number: 10175481
    Abstract: A head up display arrangement for a motor vehicle includes a body that is at least partially transparent and that has a plurality of outer surfaces. An image source emits an illuminated image into a transparent portion of the body such that the illuminated image is internally reflected off the outer surfaces a plurality of times within the transparent portion of the body before leaving the body and then being reflected off of a windshield of the vehicle such that the illuminated image is visible to a driver of the vehicle.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: January 8, 2019
    Assignee: Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America
    Inventor: David Kay Lambert
  • Patent number: 10158791
    Abstract: Camera device 1 for taking at least one image of a scene in front of the camera device 1, the camera device 1 comprising: a sensor-camera 2 with a main beam path, whereby the sensor-camera 2 comprises a sensor 3, an IR filter 4 and an objective 5, whereby the IR filter 4 is arranged between the objective 5 and the sensor 3, whereby light with a wavelength smaller than a cut-off range passes the IR filter 4 into the sensor 3 and light with a wavelength larger than the cut-off range is reflected by the IR filter 4 and, whereby the main beam path is from the objective 5 into the sensor 3, whereby the objective 5 comprises a final optical element 7, whereby the final optical element 7 is the optical element next to the IR filter 4, whereby the IR filter 4 is tilted by a tilting angle, so that most of the reflected light or all of the reflected light is guided away from the final optical element 7.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: December 18, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Ildiko Suveg, Jan Klijn, Martin Hartman, Rajesh Sreedharanpillai, Willibrordus Van der Poel
  • Patent number: 10108077
    Abstract: A light source apparatus includes a first light source section that outputs blue light along a first illumination optical axis,the second light source section are arranged side by side and outputs excitation light along a second illumination optical axis substantially parallel to the first illumination optical axis, a reflection member that reflects the excitation light in such a way that the reflected excitation light travels along a third illumination optical axis that intersects the first illumination optical axis and the second illumination optical axis, a wavelength converter on which reflects converted light having a wavelength different from a wavelength of the excitation light, and a light combiner that is located in the position where the first illumination optical axis and the third illumination optical axis intersect each other and transmits the blue light and the excitation light but reflects the converted light.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: October 23, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Katsumitsu Hama, Tomohiro Takagi, Yuta Ito, Takayuki Matsubara
  • Patent number: 10077885
    Abstract: An iris diaphragm comprises a stationary ring, a rotatable adjusting ring, and a plurality of shutter blades. The plurality of shutter blades forms a diaphragm aperture inside the stationary ring and rotation of the adjusting ring moves the shutter blades inside the stationary ring whereby the size of the diaphragm aperture can be changed. The shutter blades are formed as a flat opaque surface and at least one of the shutter blades comprises at least one transparent region formed in said opaque surface. A light fixture comprises such iris diaphragm arranged between a light source generating a light beam and an optical assembly configured to project the light beam along an optical axis.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: September 18, 2018
    Assignee: MARTIN PROFESSIONAL APS
    Inventor: Claus Ellevang Hansen
  • Patent number: 10078214
    Abstract: The invention discloses a light source module, a projection device and driving methods thereof, wherein a wavelength conversion device of the light source module has at least one wavelength conversion area for converting a blue beam provided by a blue light source into a converted beam, and the converted beam is transmitted to a wavelength selection element so that a first green beam is obtained by the wavelength selection element from at least a portion of the converted beam. According to the blue light source, a red light source, the wavelength conversion device and the wavelength selection element, the light source module provides an illumination beam corresponding to a first display mode or a second display mode.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: September 18, 2018
    Assignee: Coretronic Corporation
    Inventors: Chien-Chung Liao, Chun-Ju Wang
  • Patent number: 10073334
    Abstract: Provided is a projection system, a light source system, and a light source assembly. The light source system (100) comprises an excitation light source (101), a wavelength conversion device (106), a color filtering device (107), a drive device (108), and a first optical assembly. The wavelength conversion device (106) comprises at least one wavelength conversion region. The optical filtering device (107) is fixed face-to-face with the wavelength conversion device (106), and comprises at least a first optical filtering region. The drive device (108) drives the wavelength conversion device (106) and the optical filtering device (107), allowing the wavelength conversion region and the first optical filtering region to act synchronously, and the wavelength conversion region is periodically set on the propagation path of the excitation light, thereby converting the excitation light wavelength into converted light.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: September 11, 2018
    Assignee: APPOTRONICS CORPORATION LIMITED
    Inventors: Fei Hu, Yi Li, Yi Yang
  • Patent number: 10042240
    Abstract: Provided is a projection system, a light source system, and a light source assembly. The light source system (100) comprises an excitation light source (101), a wavelength conversion device (106), a color filtering device (107), a drive device (108), and a first optical assembly. The wavelength conversion device (106) comprises at least one wavelength conversion region. The optical filtering device (107) is fixed face-to-face with the wavelength conversion device (106), and comprises at least a first optical filtering region. The drive device (108) drives the wavelength conversion device (106) and the optical filtering device (107), allowing the wavelength conversion region and the first optical filtering region to act synchronously, and the wavelength conversion region is periodically set on the propagation path of the excitation light, thereby converting the excitation light wavelength into converted light.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: August 7, 2018
    Assignee: APPOTRONICS CORPORATION LIMITED
    Inventors: Fei Hu, Yi Li, Yi Yang
  • Patent number: 10041642
    Abstract: Disclosed is a laser-based device for use primarily for laser light effects. The laser device comprises multiple red, green, and blue lasers. Each laser has a lens to collimate and focus each individual beam. The lasers are aligned such that each laser shares a common output axis. The intensity of each laser is adjustable thereby allowing the overall output color of the device to change. The overall output has over 16 million colors. Each laser-based device has a gimbal-like system to allow the devices change theft orientation. A remote control system allows for the control and synchronization of multiple devices. Multiple devices may connect to the remote control system using cables, wireless transceivers, or both. Multiple devices may be located in close proximity to create a more powerful overall output beam. The remote control system allows for viewer interaction through an application installed onto a personal communication device.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: August 7, 2018
    Inventors: Timothy Lee Anderson, Tamas Kovacs
  • Patent number: 10034348
    Abstract: In various embodiments, a light-emitting apparatus is provided. The light-emitting apparatus includes at least one semiconductor light source configured to emit at least one primary light beam, a deflection device configured to deflect the at least one primary light beam onto respectively associated different positions on a phosphor body, at least one light detector configured to detect light that was emitted by the phosphor body, and an evaluation device. The evaluation device is configured to identify damage to the phosphor body on the basis of at least one measurement signal generated by the at least one light detector, and to correlate the at least one measurement signal with at least one position on the phosphor body.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: July 24, 2018
    Assignee: OSRAM GMBH
    Inventors: Thomas Kuchler, Oskar Schallmoser
  • Patent number: 10018900
    Abstract: An illumination device includes: an excitation light source that emits excitation light having a first wavelength; and a fluorescent member that includes a fluorescent substance that, when it is irradiated with the excitation light, emits light having a second wavelength longer than the first wavelength, transmits a part of the excitation light and reflects another part of the excitation light, and a first reflective film provided at a side of the fluorescent substance, which is opposite to an excitation light incidence side, the fluorescent member emitting multiplexed light including an excitation light component reflected from the fluorescent substance and the first reflective film and a light component emitted from the fluorescent substance.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: July 10, 2018
    Assignee: Sony Corporation
    Inventor: Koji Kita
  • Patent number: 9995927
    Abstract: An illumination device includes: an excitation light source that emits excitation light having a first wavelength; a fluorescent substance that, when irradiated with the excitation light, emits light having a second wavelength longer than the first wavelength and transmits a part of the excitation light, and thereby multiplexes and emits the transmitted excitation light having the first wavelength and the emitted excitation light having the second wavelength; and a driving unit that moves an irradiation position of the excitation light in the fluorescent substance with the passage of time.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: June 12, 2018
    Assignee: Sony Corporation
    Inventor: Yoshikazu Komatsu
  • Patent number: 9989838
    Abstract: A light emitting element includes a base material having a rough surface and a phosphor layer which is directly or indirectly formed on the rough surface of the base material and includes a plurality of phosphor particles which are bonded to each other by a binder.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: June 5, 2018
    Assignee: Sony Corporation
    Inventors: Yuki Maeda, Takahiro Igarashi, Yutaka Imai
  • Patent number: 9929690
    Abstract: A solar thermal photovoltaic device, and method of forming same, includes a solar absorber and a spectrally selective emitter formed on either side of a thermally conductive substrate. The solar absorber is configured to absorb incident solar radiation. The solar absorber and the spectrally selective emitter are configured with an optimized emitter-to-absorber area ratio. The solar thermal photovoltaic device also includes a photovoltaic cell in thermal communication with the spectrally selective emitter. The spectrally selective emitter is configured to permit high emittance for energies above a bandgap of the photovoltaic cell and configured to permit low emittance for energies below the bandgap.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: March 27, 2018
    Assignee: Massachusetts Institute of Technology
    Inventors: Andrej Lenert, David Bierman, Walker Chan, Ivan Celanovic, Marin Soljacic, Evelyn N. Wang, Young Suk Nam, Kenneth McEnaney, Daniel Kraemer, Gang Chen
  • Patent number: 9904158
    Abstract: Provided is a projection system, a light source system, and a light source assembly. The light source system (100) comprises an excitation light source (101), a wavelength conversion device (106), a color filtering device (107), a drive device (108), and a first optical assembly. The wavelength conversion device (106) comprises at least one wavelength conversion region. The optical filtering device (107) is fixed face-to-face with the wavelength conversion device (106), and comprises at least a first optical filtering region. The drive device (108) drives the wavelength conversion device (106) and the optical filtering device (107), allowing the wavelength conversion region and the first optical filtering region to act synchronously, and the wavelength conversion region is periodically set on the propagation path of the excitation light, thereby converting the excitation light wavelength into converted light.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: February 27, 2018
    Assignee: APPOTRONICS CORPORATION LIMITED
    Inventors: Fei Hu, Yi Li, Yi Yang
  • Patent number: 9897899
    Abstract: The present disclosure discloses a light-emitting device and a projection system, comprising: a light source, configured to emit excitation light; a beam-splitting-combining plate disposed in an outgoing light path of the excitation light, and including a beam-splitting portion configured to split the excitation light into a first excitation light and a second excitation light along different propagation paths; a first wavelength conversion device including a first wavelength converting layer configured to absorb the first excitation light to generate first excited light; and a second wavelength conversion device configured to reflect the second excitation light back to the beam-splitting-combining plate. The beam-splitting-combining plate further includes a beam-combining portion disposed around the beam-splitting portion, and the beam-combining portion is configured to combine the first excited light and the second excitation light respectively reflected to the beam-splitting-combining plate into one beam.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: February 20, 2018
    Assignee: APPOTRONICS CORPORATION LIMITED
    Inventors: Fei Hu, Jiayi Yang
  • Patent number: 9897736
    Abstract: The lighting device includes at least two light sources; at least two input guides coupled to the light sources; and a light collector coupled to the light-sensing guides. Each of the input guides has an input end facing the corresponding light source, and an output end tangentially coupled to the light collector such as to lead a light beam from the corresponding light source into the collector. The input guides are helically-shaped between the input and the output ends.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: February 20, 2018
    Assignee: Valeo Systemes Thermiques
    Inventor: Maryline Thorailler
  • Patent number: 9888220
    Abstract: A light source device capable of improve energy efficiency is provided. A light source device includes a yellow phosphor that emits yellow fluorescence excited by exciting light, a red laser light source that emits red laser light, a first light combining unit that generates first composite light by combining the emitted yellow fluorescence with the emitted red laser light, a blue laser light source that emits blue laser light, and a second light combining unit that generates second composite light by combining the combined first composite light with the emitted blue laser light.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: February 6, 2018
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Shinichiro Chikahisa
  • Patent number: 9810826
    Abstract: A light emitting device (1) comprising at least one light source (2) adapted for, in operation, emitting first light (13) with a first spectral distribution, a light guide (4) made of a luminescent material and comprising a light input surface (41) and a light exit surface (42) extending in an angle different from zero to one another, the light guide further comprising a first further surface (46) extending parallel to and arranged opposite to the light exit surface, wherein the light guide is adapted for receiving the first light (13) with the first spectral distribution at the light input surface, converting at least a part of the first light with the first spectral distribution to second light (14) with a second spectral distribution, guiding the second light with the second spectral distribution to the light exit surface and coupling the second light with the second spectral distribution out of the light exit surface.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: November 7, 2017
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Dmitri Anatolievich Chestakov, Rifat Ata Mustafa Hikmet, Stefan Willi Julius Gruhlke, Ties Van Bommel, Albert Bijlsma, Dirk Kornelis Gerhardus De Boer, Gerardus Everardus Marie Hannen, Hendrik Jan Eggink
  • Patent number: 9733552
    Abstract: An image pickup device includes an image pickup element which captures an image of a projection surface, an optical filter which has higher transmissivity for infrared light than for visible light, a visible light transmitting member whose transmissivity for visible light is higher than the corresponding transmissivity of the optical filter, and a switching unit which switches between a first condition where the optical filter is disposed on an optical path of light entering the image pickup element, and a second condition where the visible light transmitting member is disposed on the optical path.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: August 15, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Nobuyuki Otsuki, Haiyan Zhou
  • Patent number: 9733558
    Abstract: An illumination device includes: an excitation light source that emits excitation light having a first wavelength; a fluorescent substance that, when irradiated with the excitation light, emits light having a second wavelength longer than the first wavelength and transmits a part of the excitation light, and thereby multiplexes and emits the transmitted excitation light having the first wavelength and the emitted excitation light having the second wavelength; and a driving unit that moves an irradiation position of the excitation light in the fluorescent substance with the passage of time.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: August 15, 2017
    Assignee: Sony Corporation
    Inventor: Yoshikazu Komatsu
  • Patent number: 9711111
    Abstract: An HDR display is a combination of technologies including, for example, a dual modulation architecture incorporating algorithms for artifact reduction, selection of individual components, and a design process for the display and/or pipeline for preserving the visual dynamic range from capture to display of an image or images. In one embodiment, the dual modulation architecture includes a backlight with an array of RGB LEDs and a combination of a heat sink and thermally conductive vias for maintaining a desired operating temperature.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: July 18, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Robin Atkins
  • Patent number: 9693025
    Abstract: An image projector includes a light source to emit light, an image forming device to form an image based on a reflected light of the light emitted from the light source, a color wheel disposed between the light source and the image forming device so as to pass the light emitted from the light source to the image forming device through an optical path, the color wheel including a plurality of color filters, at least one lens to project the image formed on the image forming device to a projection surface as a projection image, and circuitry to cause the color wheel be moved away from the optical path for the light emitted from the light source, when a brightness of the projection image is to be increased.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: June 27, 2017
    Assignee: Ricoh Company, Ltd.
    Inventor: Shigekazu Tsuji
  • Patent number: 9681110
    Abstract: There is provided a luminescent wheel including a reflecting plate on which a diffuse plate and a luminescent material layer are provided in an end-to-end relationship with each other in a circumferential direction, a first supporting plate which is provided on one surface of the reflecting plate to support part of the diffuse plate, and a second supporting plate which is provided on the other surface of the reflecting plate to support part of the diffuse plate, and the luminescent material layer is formed on the reflecting plate.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: June 13, 2017
    Assignee: CASIO COMPUTER CO., LTD.
    Inventor: Takeshi Miyazaki
  • Patent number: 9664892
    Abstract: Apparatus and methods are disclosed for generating blue color illumination for use in a projection system. Light from a blue laser light source is reflected off a dichroic filter sequentially onto different color emitting phosphor coated light non-transmissive segments and onto a cyan color emitting phosphor coated light transmissive segment of a rotating color wheel. The different color light and cyan color light emitted by the phosphor back to the filter is selectively transmitted by the filter along a projection path. Blue laser light and cyan color light emitted by the phosphor transmitted through the color wheel is directed along a wraparound optical path back to the filter for reflection along the projection optical path.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: May 30, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Philip Scott King, Gregory Scott Pettitt, Sajjad Ali Khan
  • Patent number: 9651853
    Abstract: A light source device includes a phosphor layer having a side surface, a bottom surface, and an upper surface opposed to the bottom surface, a substrate disposed on the bottom surface side of the phosphor layer, and a reflecting member disposed outside the phosphor layer. The phosphor layer generates fluorescence in response to irradiation with excitation light. The fluorescence generated in the phosphor layer is emitted from the upper surface and the side surface. The fluorescence emitted from the side surface enters the reflecting member.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: May 16, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Osamu Arakawa
  • Patent number: 9648292
    Abstract: An image projection apparatus includes a light source, a color wheel, a controller. The controller controls, in a first mode, electric power supplied to the light source at a timing of a first color filter being irradiated with light from the light source to be a value higher than electric power supplied to the light source at a timing of a second color filter corresponding to a color having lower visibility than a color of the first color filter being irradiated with the light from the light source. Furthermore, the controller controls, in a second mode, the electric power supplied to the light source at the timing of the first color filter being irradiated with the light from the light source to be a value lower than the electric power supplied to the light source at the timing of the second color filter being irradiated with the light.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: May 9, 2017
    Assignee: RICOH COMPANY, LIMITED
    Inventor: Takahiro Kado
  • Patent number: 9618738
    Abstract: An illumination device includes: an excitation light source that emits excitation light having a first wavelength; a fluorescent substance that, when irradiated with the excitation light, emits light having a second wavelength longer than the first wavelength and transmits a part of the excitation light, and thereby multiplexes and emits the transmitted excitation light having the first wavelength and the emitted excitation light having the second wavelength; and a driving unit that moves an irradiation position of the excitation light in the fluorescent substance with the passage of time.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: April 11, 2017
    Assignee: Sony Corporation
    Inventor: Yoshikazu Komatsu
  • Patent number: 9606348
    Abstract: A phosphor wheel comprises a wavelength conversion portion. The wavelength conversion portion comprises a wavelength conversion material optically integrated with at least one convex surface.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: March 28, 2017
    Assignee: MATERION CORPORATION
    Inventors: Simon Cao, Louis Chen, Chai Sing Lim
  • Patent number: 9609293
    Abstract: A wavelength converting member includes at least a first, second, and third regions, circumferentially on a disc-shaped light-transmissive substrate. The first region includes, from a light incident direction, a first and second phosphor layers. The first phosphor layer includes a first phosphor to absorb at least part of incident light and to emit a first light having a wavelength different from the incident light. The first phosphor layer defines an indentation in a surface on the second phosphor layer side, with a depth a half or more of the thickness of a portion of the first phosphor layer absent of the indentation. The second phosphor layer includes a second phosphor to absorb at least part of the first light emitted by the first phosphor and to emit a second light having a wavelength different from the first light, and is disposed in the indentation of the first phosphor layer.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: March 28, 2017
    Assignee: NICHIA CORPORATION
    Inventors: Naoki Saka, Yoshinori Murazaki, Isamu Niki
  • Patent number: 9581805
    Abstract: An illumination device includes: an excitation light source that emits excitation light having a first wavelength; and a fluorescent member that includes a fluorescent substance that, when it is irradiated with the excitation light, emits light having a second wavelength longer than the first wavelength, transmits a part of the excitation light and reflects another part of the excitation light, and a first reflective film provided at a side of the fluorescent substance, which is opposite to an excitation light incidence side, the fluorescent member emitting multiplexed light including an excitation light component reflected from the fluorescent substance and the first reflective film and a light component emitted from the fluorescent substance.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: February 28, 2017
    Assignee: Sony Corporation
    Inventor: Koji Kita
  • Patent number: 9575401
    Abstract: A light source apparatus includes: at least one solid-state light source configured to output light in a predetermined wavelength range; a first optical system including at least one aspherical surface configured to convert a light flux from the solid-state light source into a substantially parallel light flux; an output unit including at least one light emitter that is excited by the light and emits visible light with a wavelength longer than that of the light, the output unit being configured to output light containing the light and the visible light; and a second optical system including at least one concave reflecting surface and being configured to reflect the light on the concave reflecting surface, the light coming from the solid-state light source and being converted into the substantially parallel light flux by the first optical system, to collect the light to the light emitter of the output unit.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: February 21, 2017
    Assignee: Sony Corporation
    Inventors: Jun Nishikawa, Kazuya Matsumoto
  • Patent number: 9568816
    Abstract: A projector system with a single imaging array has a low-etendue light source. The projector system includes a first optical path from the low-etendue light source to a plurality of optical conversion media having a plurality of emission wavelengths to provide display light with wavelengths longer than blue light. The projector system includes a second optical path from the optical conversion media to the imaging array. The projector system has a means of moving an excitation location on the optical conversion media in the first optical path. The projector system may include a blue LED, a diffuser region, or an optical conversion medium with a blue emission wavelength to provide blue display light. Light from the low-etendue light source is prevented from directly impinging on the imaging array.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: February 14, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: John Marshall Ferri, Sajjad Ali Khan, Michael Terry Davis, Vikrant R. Bhakta
  • Patent number: 9503700
    Abstract: A phosphor wheel includes a rotating disk and a wavelength converting layer. The rotating disk has a first surface and a second surface opposite to the first surface, in which the first surface forms a coating region and a non-coating region. The wavelength converting layer is formed on the coating region of the first surface for converting a light wavelength of a light beam. In addition, an embodiment of the invention discloses a projection device having the phosphor wheel. When the rotating disk of the phosphor wheel rotates, the recess portion may disturb the air around the phosphor wheel such that the temperature of the wavelength converting layer may be effectively decreased. Simultaneously, the rotating disk has a stable dynamic balance and the rotating disk has a larger heat dissipating region because the recess portion is disposed on the rotating disk.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: November 22, 2016
    Assignee: CORETRONIC CORPORATION
    Inventors: Jia-Hong Dai, Tung-Chou Hu, Tsung-Ching Lin
  • Patent number: 9405175
    Abstract: A display system that includes a projector light bulb. The system includes a light fixture with a conventional light bulb socket. A projector light bulb is provided with a socket adapter for mating electrically with the light bulb socket. A projector such as a pico projector is fit into the socket adapter or to mate with this adapter to be powered by the light bulb socket via the adapter. In lamp-type implementations, the projector is used to project onto a lamp shade-shaped rear projection screen or through a translucent shade and also upon surfaces of the ceiling or objects above the projector light bulb. A light conditioning or directing assembly may be provided that directs a portion of the projected light onto the projection screen (or shade) and another portion up onto the ceiling so as to concurrently focus on two or more surfaces at two or more focal distances.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: August 2, 2016
    Assignee: Disney Enterprises, Inc.
    Inventors: Joseph O'Brien Garlington, Brent David Strong
  • Patent number: 9380278
    Abstract: A video projection device according to this disclosure is provided with a splitter having a first region including a plurality of segments and a second region including at least one segment and configured to split a light flux emitted from a light source into a plurality of light of colors in a time-divisional manner by having the light flux enter into each one of the segments, and a video display element configured to modulate the light of the colors based on a image signal to be input and to form a image, and a controller configured to calculate a light intensity and to control the light source based on a result of the calculation.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: June 28, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Akiyoshi Yamaguchi, Masutaka Inoue, Masahiro Haraguchi
  • Patent number: 9372292
    Abstract: An imaging apparatus includes an imaging unit configured to convert an incident light flux from an optical system into an electric signal, a band-cutting element disposed between the optical system and the imaging unit, having a band-cut function of performing band-cutting to enable distinguishing between wavelengths corresponding to bright line positions of a light source having bright lines, a control unit configured to control the band-cut function of the band-cutting element, an identification unit configured to identify a light source of an image captured by the imaging unit through comparison between a first image signal captured by the imaging unit when the band-cut function of the band-cutting element is ON and a second image signal captured by the imaging unit when the band-cut function of the band-cutting element is OFF, and an image processing unit configured to perform image processing based on the light source identified by the identification unit.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: June 21, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Fumihiko Ishizaki, Shinya Urisaka
  • Patent number: 9323046
    Abstract: An illumination device includes: an excitation light source that emits excitation light having a first wavelength; and a fluorescent member that includes a fluorescent substance that, when it is irradiated with the excitation light, emits light having a second wavelength longer than the first wavelength, transmits a part of the excitation light and reflects another part of the excitation light, and a first reflective film provided at a side of the fluorescent substance, which is opposite to an excitation light incidence side, the fluorescent member emitting multiplexed light including an excitation light component reflected from the fluorescent substance and the first reflective film and a light component emitted from the fluorescent substance.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: April 26, 2016
    Assignee: Sony Corporation
    Inventor: Koji Kita
  • Patent number: 9255692
    Abstract: There is provided a light source unit including an excitation light source which emits excitation light, a luminescent material which receives excitation light from the excitation light source to emit luminous light, a diffuse plate on which the luminous light is incident, and a driving device which moves the diffuse plate so as to change an entering position of the luminous light on the diffuse plate.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: February 9, 2016
    Assignee: CASIO COMPUTER CO., LTD.
    Inventor: Hiroki Masuda
  • Patent number: 9223196
    Abstract: A lighting device comprising a pump light source and two or more phosphor wheels arranged one directly behind another. As a result, firstly, the heat loss can be dissipated via the two phosphor wheels. Secondly, only a single common collecting optical unit is required for collecting the conversion light emitted by the first phosphor wheel and the second phosphor wheel.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: December 29, 2015
    Assignee: OSRAM GmbH
    Inventor: Oliver Mehl
  • Patent number: 9204125
    Abstract: A receiving system that can receive and process 3D images and a data processing method of the same are disclosed. The receiving system includes an image receiving unit and a display unit. The image receiving unit receives a 3-dimensions (3D) image and system information including additional information of the 3D image (i.e., additional 3D image information), generates 3D signaling information based upon the additional 3D image information included in the system information, and transmits the generated 3D signaling information along with the 3D image through a digital interface. And, the display unit receives the 3D signaling information along with the 3D image through the digital interface, formats the 3D image based upon the receiving 3D signaling information, and displays the formatted 3D image.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: December 1, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Jong Yeul Suh, Chul Soo Lee, Seung Jong Choi, Jung Eun Lim, Jeong Hyu Yang, Jin Seok Im, Wern Bae Kil
  • Patent number: 9170419
    Abstract: The present invention provides a reversible piezochromic system that changes appearance upon application of a mechanical force. The reversible piezochromic system includes a cavity defined by a first substrate and a second substrate. The cavity includes at least a first fluid. The first fluid spreads when a mechanical force is applied to the system. The relaxation time of the first fluid depends upon the internal forces of the system. These internal forces at least include the surface energy differences between the substrates and the fluid or fluids, and the rheological properties of the fluid or fluids.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: October 27, 2015
    Assignee: Sun Chemical Corporation
    Inventors: Deborah Charlson, Lisa Clapp, David J. Kozak, Paul Merchak, Mark Ortalano, Russell J. Schwartz
  • Patent number: 9152021
    Abstract: A light source device includes a light emitting element and a wavelength conversion device. The wavelength conversion device includes a stationary member, a moveable carrier made of a transparent material carrying one or more wavelength conversion materials and moveable relative to the stationary member, and a stationary first filter. The first filter is fixed on the stationary member and disposed adjacent the moveable carrier. The excitation light from the light emitting element passes through the first filter and illuminates the wavelength conversion materials on the moveable carrier. The wavelength conversion materials convert the excitation light into converted light as the output of the light source device. The size of the first filter is smaller than the size of the moveable carrier and smaller than a carrying area of the moveable carrier that carries the wavelength conversion material. A wavelength conversion method using the wavelength conversion device is also described.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: October 6, 2015
    Assignee: APPOTRONICS LTD.
    Inventors: Yi Li, Yi Yang
  • Patent number: 9140969
    Abstract: An illumination optical system includes: a light source that generates excitation light; a fluorescent body that generates fluorescent light by irradiation with the excitation light and that is disposed in a region wider than the irradiation spot of the excitation light; a plate in which the fluorescent body is disposed; and a driving mechanism that moves the plate so that the irradiation spot of the excitation light can intermittently move over the fluorescent body.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: September 22, 2015
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Hiroyuki Saitou
  • Patent number: 9131165
    Abstract: An illumination light source system includes an excitation light source; a reflection/transmission member having a transmission area which transmits excitation light from the excitation light source and a reflection area which reflects the excitation light, the transmission area and the reflection area sequentially crossing an emission light path of the excitation light source; a fluorescent member provided in at least one of a reflection light path of the excitation light reflected by the reflection area and a transmission light path of the excitation light transmitted through the transmission area, the fluorescent member being provided with a phosphor which generates a color different from that of the excitation light by excitation with the excitation light; and a controller which reduces a light volume of the excitation light source while a boundary area between the transmission area and the reflection area of the reflection/transmission member is located on the emission light path.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: September 8, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tatsuya Takahashi, Kazuhiro Fujita, Toshiharu Murai, Ikuo Maeda, Takehiro Nishimori