Polarizer Or Interference Filter Patents (Class 353/20)
-
Patent number: 9546775Abstract: A laser light decorative lighting apparatus. The laser light decorative lighting apparatus including a laser light source generating a light and a motion assembly. The motion assembly including an articulating optical element disposed in a path of the light being generated by the laser light source and a motor coupled to the articulating element such that a movement generated by the motor drives the articulating optical element. The motion assembly being configured such that the movement driving the articulating optical element by the motor causes the light to move across a surface onto which the light is being projected in a pattern.Type: GrantFiled: January 20, 2016Date of Patent: January 17, 2017Assignee: Telebrands Corp.Inventors: Ajit Khubani, Yun Pan
-
Patent number: 9535255Abstract: An autostereoscopic projection device comprises a light source providing a light, a light scanning module, a light transmitting module, a light combining module including a first light combining element, a spatial light modulator module including a first spatial light modulator element, and a lens. The light scanning module includes a reflective surface and an actuating device capable of deflecting the reflective surface. The normal vector of an incident surface of the first light combining element is coplanar with the normal vector of a reflective surface of the first spatial light modulator element, and the coplanar plane is perpendicular to a disposition plane of the projection device. The light provided by the light source module is transmitted through the light scanning module, the light transmitting module, the light combining module and the spatial light modulator module sequentially and then leaves the projection device through the lens.Type: GrantFiled: April 23, 2014Date of Patent: January 3, 2017Assignee: DELTA ELECTRONICS, INC.Inventor: June-Jei Huang
-
Patent number: 9528671Abstract: A laser optical system for a head lamp may include a laser diode emitting light, a PCB substrate to which the laser diode is attached, the PCB substrate controlling supply of current to the laser diode, a fluorescent body located in front of the laser diode, reacting with the light emitted from the laser diode and thereby outputting white light, a guide path located in front of the laser diode and guiding light, which is outputted from the laser diode, to the fluorescent body, and an internal reflecting surface located between the fluorescent body and the guide path and connected to the guide path, the internal reflecting surface reflecting light, which has been incident on the fluorescent body and scattered backwards, to the fluorescent body.Type: GrantFiled: August 15, 2014Date of Patent: December 27, 2016Assignees: Hyundai Motor Company, Hyundai Mobis Co., Ltd.Inventors: Byoung Suk Ahn, Tae Won Lee
-
Patent number: 9525855Abstract: Projection subsystems are described. More, particularly, projection subsystems that include a light source and a polarizing beam splitter are described. The polarizing beam splitters of the presently described projection subsystems are capable of avoiding performance degradation even after exposure to large doses of incident light.Type: GrantFiled: August 14, 2012Date of Patent: December 20, 2016Assignee: 3M Innovative Properties CompanyInventors: Stephen J. Willett, Craig R. Schardt, David J. W. Aastuen
-
Patent number: 9505501Abstract: An air intake device for a submarine comprises a first fixed member connected to the submarine hull and a second member which is telescopically movable relative to the first member to rise up with an upper end of it above the water's surface to allow air to be taken in from the atmosphere during navigation of the submarine at periscope depth, the movable member mounting at its upper end a radar device designed to emerge from the water together with the selfsame movable member.Type: GrantFiled: December 11, 2013Date of Patent: November 29, 2016Assignee: CALZONI S.R.L.Inventor: Daniele Maria Bertin
-
Patent number: 9494805Abstract: A stereoscopic device for recapturing light is provided. A chassis is open on front and back sides and forms a rectangular housing with top, bottom, and two sides that frame the front and back openings. A polarizing beam splitter is angled away from the back opening of the chassis and captively held by the chassis. The beam splitter is constructed of substantially orthogonally polarizing material. A phase shifting optic having a reflective surface coated by a phase shifting film is angled toward the front opening, wherein the beam splitter and phase shifting optic are in optical alignment with each other within the chassis. A modulator sized to cover the front opening is positioned in front of the chassis.Type: GrantFiled: January 21, 2014Date of Patent: November 15, 2016Assignee: Lightspeed Design, Inc.Inventors: Chris Ward, Robert Mueller, Kirk Melby
-
Patent number: 9491425Abstract: Technologies are generally described that relate to imaging and viewing systems, devices and methods that can facilitate private viewing of images (e.g., from streaming video). A projection display device can scramble display images such that the display images are viewable by viewers using specialized devices (e.g., eyewear) that can descramble and/or decode the projected display images. The devices may include optical elements that can be modulated to descramble the images and display the images for the viewer. Some devices may also include digital cameras that electronically capture the scrambled images and unscramble the images. Various example devices may include stereoscopic cameras to enable the viewer to see a 3-dimensional image. The images may also be transmitted wirelessly to the devices to enable the viewer to see the multimedia display while on the move and/or shared with other viewers, with limited discomfort resulting from motion.Type: GrantFiled: July 10, 2012Date of Patent: November 8, 2016Assignee: EMPIRE TECHNOLOGY DEVELOPMENT LLCInventor: John Lawrence Coulson
-
Patent number: 9488765Abstract: A wire grid polarizer includes a substrate, and a plurality of wire patterns which is arranged on the substrate at periodic intervals, where the wire patterns include first wire patterns, which are disposed on the substrate, and one or more second wire patterns, which are disposed on one or more of the first wire patterns each of the second wire patterns including at least one of a neutral pattern, a surface treatment pattern and first and second monomer block patterns.Type: GrantFiled: October 27, 2015Date of Patent: November 8, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Min Hyuck Kang, Hyeong Gyu Jang, Eun Ae Kwak, Moon Gyu Lee
-
Patent number: 9488848Abstract: Polarizing beam splitter is disclosed. The polarizing beam splitter includes a first polymeric prism, a second polymeric prism, a reflective polarizer that is disposed between and adhered to a hypotenuse of each of the first and second polymeric prisms, and a hardcoat that is disposed on each of the first and second polymeric prisms. The polarizing beam splitter includes an input major surface and an output major surface. At least one of the input and output major surfaces has a pencil hardness of at least 3H. The polarizing beam splitter has a low birefringence such that when polarized light having a first polarization state enters the optical element from the input major surface and travels through at least 2 mm of the polarizing beam splitter and exits the polarizing beam splitter from the output major surface, at least 95% of light exiting the polarizing beam splitter is polarized has the first polarization state.Type: GrantFiled: August 15, 2013Date of Patent: November 8, 2016Assignee: 3M Innovative Properties CompanyInventors: Andrew J. Ouderkirk, Joseph C. Carls, Scott B. Charles, Cameron T. Murray
-
Patent number: 9470964Abstract: A first lens array splits light flux emitted from a light source. A second lens array is provided with a plurality of lens cells two-dimensionally arranged, on which light emitted from the first lens array is irradiated. A polarization converting element splits indefinite polarized light emitted from the second lens array into P polarized light and S polarized light, and conforms the split light to either the P polarized light or the S polarized light and emits the conformed light. A drive mechanism displaces the polarization converting element in a direction perpendicular to a polarization split direction along a surface on which the indefinite polarized light from the polarization converting element is incident.Type: GrantFiled: March 13, 2013Date of Patent: October 18, 2016Assignee: JVC KENWOOD CORPORATIONInventor: Takatsugu Aizaki
-
Patent number: 9466941Abstract: A patterned retarder is described that may be used with a laser source array to obtain a combined beam suitable for laser image projection (e.g., three-dimensional laser image projection using orthogonal polarization states and/or orthogonal color spaces). An effect of the retarder on a polarization state of an incident beam may be dependent on the location of the retarder upon which the beam is incident. In one example, a method of producing a laser beam from a plurality of component laser beams includes directing the plurality of component laser beams onto corresponding regions of such a patterned retarder having a plurality of pattern elements.Type: GrantFiled: March 15, 2013Date of Patent: October 11, 2016Inventors: Peter Janssens, Koenraad Vermeirsch
-
Patent number: 9448416Abstract: A light source device includes: a laser light source; a circular substrate which has fluorescent body that emits light by using light from the laser light source as excitation light; a wheel motor which rotates circular substrate; a dichroic prism which transmits the light from fluorescent body while reflecting the light from the laser light source; a diffusion plate which diffuses the light from the laser light source; and a plate spring which interconnects diffusion plate and wheel motor.Type: GrantFiled: July 13, 2011Date of Patent: September 20, 2016Assignee: NEC Display Solutions, Ltd.Inventors: Hiroko Chifu, Motoyasu Utsunomiya
-
Patent number: 9437841Abstract: Disclosed are an OLED display structure and an OLED display device having the OLED display structure. The OLED display structure comprises: a substrate (10), and an OLED pixel layer (20), an o-light and e-light splitting and converting device (5) and a circular polarizer layer (6) which are formed on the substrate (10) in sequence; the o-light and e-light splitting and converting device (5) is adapted to divide a light beam into o-light and e-light, and to convert the o-light and the e-light into circularly polarized light which has the same polarization state as the circular polarizer layer (6); the circular polarizer layer (6) is adapted to allow passage of the circularly polarized light which has the same polarization state as it. With the display structure, the light transmittance is improved, and the pixel current of the OLED pixel layer (20) is reduced, and thereby energy is saved.Type: GrantFiled: January 25, 2013Date of Patent: September 6, 2016Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Xiaodong Zhou, Jaegeon You
-
Patent number: 9429761Abstract: A first dichroic mirror (2a) and a second dichroic mirror (2b) are formed on the bonding surfaces between four right angle prisms (1a-1d) so as to intersect. The first dichroic mirror (2a) transmits, of visible light of P-polarization, at least the light of a specific wavelength band and reflects, of visible light of S-polarization, at least the light of the specific wavelength band. The second dichroic mirror (2b) transmits, of visible light of P-polarization, at least light of the specific wavelength band and transmits, of visible light of S-polarization, at least light of the specific wavelength band. The cutoff wavelengths with respect to S-polarized light of both dichroic mirrors (2a and 2b) are set within ranges of bands other than those of the three primary colors of light.Type: GrantFiled: September 9, 2010Date of Patent: August 30, 2016Assignee: NEC CORPORATIONInventors: Masao Imai, Goroh Saitoh, Fujio Okumura
-
Patent number: 9429831Abstract: In a lighting device, light in a first wavelength range which is output from a light emitting element passes through a first phase difference plate, and is separated into a first light flux and a second light flux by a polarization separation element. A wavelength conversion unit converts the first light flux to a third light flux. An optical element converts the second light flux into a fourth light flux. A first color combining element combines the third light flux with the fourth light flux. A first control unit changes a direction of an optical axis of the first phase difference plate according to an intensity of the third light flux and an intensity of the fourth light flux.Type: GrantFiled: November 20, 2014Date of Patent: August 30, 2016Assignee: SEIKO EPSON CORPORATIONInventor: Koichi Akiyama
-
Patent number: 9423674Abstract: A system for projecting to a viewing surface includes an illumination source to project a first image onto the viewing surface along a beam path, an LCD, with at least one pixel having a polarization rotation profile that approaches zero at an edge, for placement in the beam path of the illumination source to the viewing surface to transmit the first image in a first polarization state through the LCD to the viewing surface and to propagate a second image in a second polarization state from the LCD to the viewing surface, and a first polarization filter to provide the first image in the first polarization state prior to the first image being transmitted through the LCD. At least one of the first image in the first polarization state and the second image in the second polarization state is in a non-detectable polarization state when illuminated upon the viewing surface.Type: GrantFiled: March 13, 2014Date of Patent: August 23, 2016Assignee: LOCKHEED MARTIN CORPORATIONInventor: Edward J. Miesak
-
Patent number: 9400419Abstract: An illumination device comprises a light source (3a) that includes a solid-state light source whose peak wavelength is set in the red wavelength band, a light source (3b) that includes a solid-state light source whose peak wavelength is set in the green wavelength band, a light source (3c) that includes a solid-state light source whose peak wavelength is set in the blue wavelength band, and a color synthesis optical element (1) that combines P-polarized colored light incident from one light source (3b) and S-polarized colored light incident from the other two light sources (3a and 3c). One light source (3c) includes at least one solid-state light source whose peak wavelength is set in the wavelength band of the color corresponding to one of the other light sources (3b).Type: GrantFiled: September 10, 2010Date of Patent: July 26, 2016Assignee: NEC CORPORATIONInventors: Masao Imai, Goroh Saitoh, Fujio Okumura
-
Patent number: 9395471Abstract: A display device includes a display panel including a display area for displaying an image and a non-display area adjacent to the display area, a polarizing plate positioned on the display panel and including a polarizing layer for polarizing light that passes through the polarizing layer, and a light shielding layer positioned between the display panel and the polarizing plate. The light shielding layer is formed at an edge of the display panel to correspond to the non-display area.Type: GrantFiled: March 5, 2013Date of Patent: July 19, 2016Assignee: Samsung Display Co., Ltd.Inventor: Sang-Min Yi
-
Patent number: 9388950Abstract: An illumination beam adjustment apparatus is disclosed. The apparatus comprises a housing (4), a plurality of first optical elements (12) fixed relative to the housing and adapted to receive and transmit electromagnetic radiation and adjust the beam angle of a beam of electromagnetic radiation passing therethrough, and a second optical element (14) removably mounted relative to the housing and adapted to receive electromagnetic radiation from the first optical elements and transmit electromagnetic radiation. The second optical element is adapted to adjust the beam angle of a beam of an electromagnetic radiation passing therethrough.Type: GrantFiled: August 2, 2012Date of Patent: July 12, 2016Assignee: Raytec LimitedInventors: Shaun Lee Cutler, David Raymond Lambert, Anthony Gerard Whiting
-
Patent number: 9389427Abstract: An optical system is configured to introduce light modulated by a reflective light modulator to a projection lens configured to project the light onto a target plane. The optical system includes a polarization beam splitter configured to introduce each of first colored light as p-polarized light and second colored light as s-polarized light to a corresponding one of reflective optical modulators that are different from each other, and to synthesize light fluxes modulated by the reflective optical modulators with each other, a beam splitter arranged between the polarization beam splitter and the projection lens and configured to split the first colored light in accordance with a polarization direction of the first colored light and to transmit or reflect the second colored light irrespective of a polarization direction of the second colored light, and a half-wave plate arranged between the polarization beam splitter and the beam splitter.Type: GrantFiled: April 24, 2013Date of Patent: July 12, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Hiroyuki Kodama, Takehito Kawasumi
-
Patent number: 9377625Abstract: Aspects of the present invention relate to optical systems in head worn computing.Type: GrantFiled: February 28, 2014Date of Patent: June 28, 2016Assignee: Osterhout Group, Inc.Inventors: John N. Border, John D. Haddick
-
Patent number: 9354496Abstract: A projector includes a light source, an image forming system adapted to form an image using light from the light source, a projection system adapted to project the image formed by the image forming system, and a dimming device including a light-blocking member adapted to move into and out of a light path between an exit end surface of the projection system and the light source, and adapted to control an intensity of the light emitted from the light source. The light-blocking member includes a first movable section having at least one light-transmitting section and a light-blocking section, and a second movable section adapted to block the light passed through the light-transmitting section. At least one radiator plate is provided to either one or both of the first movable section and the second movable section.Type: GrantFiled: April 22, 2014Date of Patent: May 31, 2016Assignee: Seiko Epson CorporationInventor: Nobuo Sugiyama
-
Patent number: 9335559Abstract: There is provided a light source unit having a light source which emits a laser beam, a plurality of diffusing plates on which the laser beam is incident and which emit the laser beam incident thereon as diffuse light, and a driving mechanism which moves the plurality of diffusing plates, wherein the laser beam from the light source is incident on one diffusing plate of the plurality of diffusing plates, and diffuse light emitted from the one diffusing plate is incident on the other diffusing plate of the plurality of diffusing plates.Type: GrantFiled: December 19, 2013Date of Patent: May 10, 2016Assignee: CASIO COMPUTER CO., LTD.Inventor: Hiroki Masuda
-
Patent number: 9310591Abstract: The present invention relates generally to a head-mounted projection display, and more particularly, but not exclusively to a polarized head-mounted projection display including a light engine and a compact, high-performance projection lens for use with reflective microdisplays.Type: GrantFiled: July 31, 2013Date of Patent: April 12, 2016Assignee: The Arizona Board of Regents on Behalf of the University of ArizonaInventors: Hong Hua, Rui Zhang
-
Patent number: 9298076Abstract: An image projector for augmenting the appearance of a physical object is disclosed, also known as an augmented reality projector. The augmented reality projector comprises an optical arrangement to provide the possibility of precise matching of a projected image of the physical object back onto the object itself, instead of using digital image processing to do so. Digital image processing may be used to enhance features of the image and is not required for resizing or orienting the image to the object. This reduces the need for computational power to process the image and spares processing resources to refresh the image in real time. Accordingly, the processed image can be refreshed to change the appearance of a moving object. Furthermore, the precise matching provides the possibility of using projected images a graphical use interface, as movements of a user's fingers on the interface can be determined accurately.Type: GrantFiled: January 5, 2014Date of Patent: March 29, 2016Assignee: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Changli Wu, Xuyan Huang, Ying Liu
-
Patent number: 9285667Abstract: A projector including a light source apparatus that includes a fluorescent layer that produces fluorescence by irradiation of an excitation light emitted from a solid-state light source, a polarization conversion element that converts the light from the light source apparatus into polarized light, and a reflector that is disposed between the light source apparatus and the polarization conversion element, transmits light in the vicinity of the optical axis of the light source apparatus, and reflects peripheral light apart from the optical axis of the light source apparatus toward the fluorescent layer.Type: GrantFiled: February 2, 2012Date of Patent: March 15, 2016Assignee: SEIKO EPSON CORPORATIONInventor: Koichi Akiyama
-
Patent number: 9250502Abstract: A projector includes: a spatial light modulator provided for each color light flux and configured to modulate the light flux in accordance with an image signal; a light combining system configured to combine the color light flux outputted from the spatial light modulator; a projection system configured to project the light combined by the light combining system; a fixing member configured to integrally fix the spatial light modulator, the light combining system, and the projection system; a base on which the spatial light modulators and the light combining system fixed to the fixing member are mounted; and a cover member configured to cover the spatial light modulator and the light combining system mounted on the base, wherein the base and the cover member form a cooling duct through which cooling air for sequentially cooling the spatial light modulator for the respective color light flux flows.Type: GrantFiled: August 6, 2010Date of Patent: February 2, 2016Assignee: Seiko Epson CorporationInventors: Akira Egawa, Kaname Nagatani, Kunihiko Takagi, Tetsuo Shimizu
-
Patent number: 9250507Abstract: Two light modulators, a first light modulator and a second light modulator, suffice for four light sources, a first light source, a second light source, a third light source, and a fourth light source, whereby the cost can be lowered as compared with a configuration in which three light modulators are required. As a result, cost reduction is achieved. Further, since two light modulators suffice, the size of the projector can be reduced as compared with the configuration in which three light modulators are required.Type: GrantFiled: July 31, 2013Date of Patent: February 2, 2016Assignee: Seiko Epson CorporationInventors: Shuji Narimatsu, Akitaka Yajima
-
Patent number: 9244290Abstract: An optical system having coherence reduction capabilities includes a light source for generating a first light pulse; an asymmetrical pulse stretcher arranged to receive the first light pulse and to generate multiple light pulses, during a pulse sequence generation period, wherein the asymmetrical pulse stretcher includes multiple optical components which define a loop and a condenser lens is located between the asymmetrical pulse stretcher and an object, for directing the multiple pulses toward an area on the object At least two optical components of the multiple optical components are positioned in an almost symmetrical manner in relation to each other and introduce a coherence-related difference between at least two pulses of the multiple pulses. The pulse sequence generation period does not exceed a response period of a detector.Type: GrantFiled: January 6, 2011Date of Patent: January 26, 2016Assignee: Applied Materials Israel Ltd.Inventors: Roman Vander, Shmuel Mangan, Boris Goldberg, Amir Moshe Sagiv
-
Patent number: 9182608Abstract: A speckle reducing device includes: a polarization splitter element with a polarization splitter portion that splits incident light into first and second light containing a first and a second component respectively, which outputs the first and the second light along different directions; a first reflecting member that reflects the first light to reenter the polarization splitter element; a first conversion member disposed between the first reflecting member and the polarization splitter element, which converts the first light to third light containing the second component; a second reflecting member that reflects the third light to reenter the polarization splitter element; and a second conversion member disposed between the second reflecting member and the polarization splitter element, which converts the third light to fourth light containing the first component, wherein: the polarization splitter element outputs the second and the fourth light along one direction.Type: GrantFiled: September 29, 2011Date of Patent: November 10, 2015Assignee: Nikon CorporationInventor: Akinobu Suga
-
Patent number: 9172207Abstract: A laser beam combining device includes three lasers, a polarizer, and a mode converter. The second laser device, the mode converter, and the third laser device are located on a first straight line in that order. The polarizer intersects with the first straight line at an imaginary joint point. An included angle between the first straight line and the polarizer is about 45 degrees. The polarizer and the mode converter are positioned between the second laser device and the third laser device. The polarizer is adjacent to the second laser device. The mode converter is adjacent to the third laser device. The first laser device faces the polarizer and is located on a second straight line perpendicular to the first straight line and passing through the joint point. The three laser devices emit TE mode red, green and blue laser beams, respectively.Type: GrantFiled: October 30, 2013Date of Patent: October 27, 2015Assignee: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: Po-Chou Chen
-
Patent number: 9170423Abstract: A light module for a projection apparatus, comprising a laser apparatus adapted to emit linearly polarized radiation in the blue wavelength range, a luminous wheel arranged in the beam path of the radiation emitted by the laser apparatus, a first beam splitter arranged in the beam path of the radiation emitted by the laser apparatus between the laser apparatus and the luminous wheel, a focusing apparatus arranged in the beam path of the radiation emitted by the laser apparatus between the first beam splitter and the luminous wheel, and at least one polarization manipulation apparatus, adapted to rotate the polarization of radiation that has passed through it twice in different directions through 90°, wherein the first beam splitter is arranged such that it is also located in the beam path of radiation in the blue wavelength range which has passed twice through the polarization manipulation apparatus in different directions.Type: GrantFiled: July 15, 2013Date of Patent: October 27, 2015Assignee: OSRAM GmbHInventor: Oliver Mehl
-
Patent number: 9170351Abstract: An optical element that can reduce the etendue of emitted light emitted from the optical element without having depend on the etendue of light-emitting elements is provided with a plasmon-excitation layer that is interposed between two layers having dielectric properties wherein, taking the plasmon-excitation layer as a border, the effective dielectric constant of the emission-side portion that is the emission layer side is higher than the effective dielectric constant of the incident-side portion that is the side of a carrier-generating layer, and the dielectric constant between the plasmon-excitation layer and the carrier-generating layer is higher than the dielectric constant between the carrier-generating layer and the light-incident surface.Type: GrantFiled: April 6, 2012Date of Patent: October 27, 2015Assignee: NEC CorporationInventors: Masanao Natsumeda, Masao Imai, Naofumi Suzuki, Mizuho Tomiyama, Shin Tominaga, Yuji Ohno
-
Patent number: 9170476Abstract: A projector includes a solid-state light source, a diffuser member, an excitation light source, a phosphor, a light modulator, a projection system, a first and a second light blocking members. When the area, viewed in the direction of the optical axis of diffused light, of an opening of the first light blocking member and the area of a portion over which the first light blocking member blocks the diffused light are defined as A1 and A2, respectively; the area, viewed in the direction of the optical axis of fluorescence, of an opening of the second light blocking member and the area of a portion over which the second light blocking member blocks the fluorescence are defined as B1 and B2, respectively, the ratio A2/A1 is greater than the ratio B2/B1.Type: GrantFiled: October 31, 2013Date of Patent: October 27, 2015Assignee: SEIKO EPSON CORPORATIONInventors: Masakazu Kawamura, Kanji Yoshida
-
Patent number: 9152031Abstract: A light source module includes a light-emitting device, a wavelength conversion device and a polarization and color separation unit. The light-emitting device provides an excitation beam including a first portion beam having a first polarization direction. The wavelength conversion device includes a first wavelength conversion area and a polarization conversion area. When the first portion beam irradiates the first wavelength conversion area, the first portion beam is converted into a first color beam. When the first portion beam irradiates the polarization conversion area, the first polarization direction of the first portion beam is converted to a second polarization direction. The polarization and color separation unit is disposed between the wavelength conversion device and the light-emitting device, and transmits the first portion beam with the first polarization direction, and reflects the first portion beam with the second polarization direction and the first color beam to the same direction.Type: GrantFiled: September 7, 2012Date of Patent: October 6, 2015Assignee: Coretronic CorporationInventors: Ching-Chuan Wei, Shu-Min Chen, Hao-Wei Chiu, Ko-Shun Chen
-
Patent number: 9134596Abstract: A light module for a projection device may include: at least one light source designed to emit partly polarization radiation; and a first polarization beam splitter, which is arranged in the beam path of the radiation emitted by the at least one light source, wherein the polarization beam splitter is designed to provide radiation of a first polarization at a first output and radiation of a second polarization at a second output. The light module includes a first beam cube arranged in the beam path of the radiation, a first to fourth LCD panels; a second dichroic beam splitter arranged between a first output of the first polarization beam splitter and a first input of the beam cube.Type: GrantFiled: November 21, 2013Date of Patent: September 15, 2015Assignee: OSRAM GmbHInventors: Klaus Finsterbusch, Ulrich Hartwig
-
Patent number: 9122145Abstract: A projector using coherent light as a light source includes: one or more coherent light sources emitting coherent light beams; a beam scanner which changes a direction of the coherent light beam; and a beam splitter which splits a beam into multiple segments and changes a phase of light of each split segment, the beam splitter being located in an optical path between the beam scanner and the coherent light source. This projector reduces speckle noises. The beam splitter includes a pair of transparent substrates; a plurality of parallel electrodes disposed on each surface of the pair of transparent substrates, the pair of the parallel electrodes being disposed in a perpendicular direction to each other. Voltages are applied to the respective electrodes at predetermined time intervals so as to produce different potentials in a liquid crystal sandwiched by the transparent substrates.Type: GrantFiled: October 26, 2010Date of Patent: September 1, 2015Assignee: Hitachi Maxwell, Ltd.Inventors: Tadayoshi Kosaka, Satoshi Ouchi, Mayumi Nagayoshi, Yoshiho Seo, Tomoki Kobori
-
Patent number: 9097907Abstract: A projector includes a light modulation unit including a liquid crystal device that modulates illumination light to form image light and a light exiting-side polarizer that causes the image light from the liquid crystal device to exit as linearly polarized light, a first retardation film that changes the polarization state of the image light from the light exiting-side polarizer into circular polarization or elliptical polarization, a polarization switching liquid crystal panel that switches the polarization state of the image light from the first retardation film in accordance with a control signal, a second retardation film that changes the polarization state of the image light from the polarization switching liquid crystal panel into linear polarization, and a birefringent substrate that selectively refracts a light component polarized in a direction corresponding to a specific switching state of the polarization switching liquid crystal panel among the image light from the second retardation film.Type: GrantFiled: March 13, 2013Date of Patent: August 4, 2015Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Endo, Kasei Sekiguchi
-
Patent number: 9075240Abstract: A three-dimensional image display device includes: a display panel including a plurality of pixels each having red, green and blue sub-pixels, the red, green and blue sub-pixels alternately disposed along a horizontal direction and each of the red, green and blue sub-pixels disposed in a single line along a vertical direction; and a parallax barrier over the display panel, the parallax barrier including a plurality of open areas and a blocking area surrounding the plurality of open areas, the plurality of open areas alternating with the blocking area, and each of the plurality of open areas corresponding to each couple of the adjacent two sub-pixels.Type: GrantFiled: December 2, 2008Date of Patent: July 7, 2015Assignee: LG Display Co., Ltd.Inventor: Hyung-Ki Hong
-
Patent number: 9069237Abstract: A projection type display apparatus including a light source, a display element, an illumination optical system and a projection lens to project a magnified image of the optical image. The illumination optical system includes a first array lens and a second array lens, each includes a plurality of lens elements arranged in a matrix, each of the lens elements having a rectangular opening, and a polarization conversion element having polarization conversion function by use of a plurality of polarized beam splitters and a plurality of half-wave phase plates, arranged in an array and opposing to the lens elements of the second array lens, to emit predetermined polarized light. The light source includes a light emitting plane of a rectangle or an ellipse shape, a longitudinal direction of the light emitting plane being parallel to a longitudinal direction of each opening of the polarization conversion element.Type: GrantFiled: February 10, 2014Date of Patent: June 30, 2015Assignee: HITACHI MAXELL, LTD.Inventors: Koji Hirata, Nobuyuki Kimura
-
Patent number: 9069105Abstract: An imaging lens having reduced susceptibility to thermally-induced stress birefringence for imaging an object plane to an image plane; comprising a plurality of lens elements. The lens element that experiences a highest optical power density is fabricated using a glass having a negligible susceptibility to thermal stress birefringence as characterized by the thermal stress birefringence metric. The other lens elements are fabricated using glasses having a negligible or a moderate susceptibility to thermal stress birefringence, at least one of the other lens elements being fabricated using a glass having a moderate susceptibility to thermal stress birefringence.Type: GrantFiled: October 1, 2013Date of Patent: June 30, 2015Assignee: EASTMAN KODAK COMPANYInventors: Andrew F. Kurtz, Joseph Raymond Bietry, Barry David Silverstein
-
Patent number: 9057881Abstract: An illumination system and a projection apparatus adopting the illumination system are provided. The projection apparatus comprises the illumination system and a light modulator. The illumination system comprises at least one light source, a curved reflecting component, a phosphor wheel, a polarizer and a half wave retarder. The light provided by the at least one light source passes through the curved reflecting component and the phosphor wheel to provide a first light in a first time sequence and a second light in a second time sequence. The first light and the second light are transformed into a first polarized light and a second polarized light respectively in different time sequences by the polarizer and the half wave retarder.Type: GrantFiled: March 1, 2013Date of Patent: June 16, 2015Assignee: DELTA ELECTRONICS, INC.Inventor: Hung Ying Lin
-
Patent number: 9057882Abstract: An optical element has layers formed on a substrate, including alternating first and second layers having first and second refractive indices, nL and nH that exhibit a spectral characteristic, providing, for incident light at a predetermined wavelength and directed toward the optical element within a range of angles bounded by first and second incident angles ?1 and ?2, between 0 and 80 degrees and differing by at least 1 degree, substantially linear polarization-averaged attenuation of the incident light energy wherein, for any incident angle ?n between ?1 and ?2, A?n is the corresponding polarization-averaged attenuation, and wherein the polarization-averaged attenuation at A?n at angle ?1 is less than or equal to an optical density value of 0.2 and the polarization-averaged attenuation A?n at angle ?2 exceeds an optical density value of 4.Type: GrantFiled: February 11, 2015Date of Patent: June 16, 2015Assignee: Semrock, Inc.Inventors: Ligang Wang, Turan Erdogan
-
Patent number: 9039207Abstract: A method for providing a feedback circuit for a three dimensional projector. First and second input devices and a sensor for determining the rotational speed of the second input device are provided. A control device for controlling the rotational speed of the second input device and a phase locked loop (PLL) are provided. A phase reference signal is created based on the signal rate of the first input device. A phase signal is created based on the rotational speed of the second input device. The PLL compares the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized. A signal is sent to the control device for the second input device to change the rotational speed of the second input device in response to determining that the first input device and the second input device are not synchronized.Type: GrantFiled: November 9, 2012Date of Patent: May 26, 2015Assignee: International Business Machines CorporationInventor: Casimer M. DeCusatis
-
Patent number: 9039185Abstract: A LCOS projection system includes an illumination device, a LCOS microdisplay element, a polarization beam splitter, an optical projection lens, and a beam recycling module. A first portion of the lighting beams provided by the illumination device are transmissible through the polarization beam splitter and directed to the LCOS microdisplay element. A second portion of the lighting beams provided by the illumination device and from the polarization beam splitter are introduced into the beam recycling module. By the beam recycling module, a polarization state of the second portion of the lighting beams is converted. Consequently, the second portion of the lighting beams in the converted polarization state can also be projected onto the LCOS microdisplay element. The beam recycling module includes a total internal reflection prism, which is arranged in a transmission path of the first portion and the second portion of the lighting beams.Type: GrantFiled: November 21, 2012Date of Patent: May 26, 2015Assignee: MIN AIK TECHNOLOGY CO., LTD.Inventors: Shi-Hwa Huang, Mao-Sheng Hsu, Ming-Hsien Tsai, Chi-Wei Chen
-
Publication number: 20150138508Abstract: Display devices with high dynamic ranges approaching the limitations of the human eye are discussed herein. High dynamic range projections systems may be 2D or 3D and devices may or may not be implemented with polarization preserving optics for high efficiency. In one embodiment, 2D HDR projection systems may compensate the modulator for varying transmission and contrast versus field of view. In another embodiment, 3D HDR projection systems may include a global or pixelated/segmented modulator. The global or pixelated/segmented modulator may be included in a stereoscopic polarization switch or in a polarization-preserving stereoscopic projection system. Additionally, a combination of global/global or pixelated/pixelated, or global/pixelated modulators may be used.Type: ApplicationFiled: November 14, 2014Publication date: May 21, 2015Inventors: Gary D. Sharp, Miller H. Schuck, Douglas J. McKnight
-
Patent number: 9033511Abstract: Provided is an illumination device that includes: light source (101); light guiding means (102) where light from light source (101) is supplied to one end surface, and light incident from the one end surface is propagated inside to exit from the other end surface; illuminating optical systems (103, 104, 106, and 107) that spatially separate a luminous flux output from the other end surface of light guiding means (102) into a plurality of luminous fluxes and that form, on display element (110), an optical image formed on the other end surface of light guiding means (102); reflective polarizing plate (109) that is located between illuminating optical systems (103, 104, 106, and 107) and display element (110) and that transmits first polarized light while reflecting second polarized light different in polarized state from the first polarized light toward illuminating optical systems (103, 104, 106, and 107); reflecting element (105) that is disposed at a position where the plurality of luminous fluxes are spatiaType: GrantFiled: September 16, 2009Date of Patent: May 19, 2015Assignee: NEC Display Solutions, Ltd.Inventor: Atsushi Katou
-
Patent number: 9028071Abstract: Light source layer (4) includes substrate (10) and a pair of layers, namely, hole-transport layer (11) and electron-transport layer (13), formed on substrate (10). Directional control layer (5) includes plasmon excitation layer (15) stacked on a side of light source layer (4), which is opposite to the side of substrate (10) of light source layer (4), and which has a plasma frequency higher than a frequency of light output from light source layer (4), and wave vector conversion layer (17) stacked on plasmon excitation layer (15), which converts light incident from plasmon excitation layer (15) into light having a predetermined exit angle to output the light. Plasmon excitation layer (15) is sandwiched between low dielectric constant layer (14) and high dielectric constant layer (16).Type: GrantFiled: October 14, 2010Date of Patent: May 12, 2015Assignee: NEC CorporationInventors: Masanao Natsumeda, Shin Tominaga, Goroh Saitoh, Masao Imai
-
Patent number: 9028070Abstract: Provided is a light-emitting element having high luminance and high directivity and emitting light in a controlled polarization state. The light-emitting element comprises substrate 3 and light emitting part 10 disposed on substrate 3 for emitting light in which light intensity of a polarization component in first direction x parallel to substrate 3 is higher than light intensities of polarization components in other directions. Light emitting part 10 includes active layer 12 for generating light and a plurality of structural bodies 14a disposed on a light-emitting side of light emitting part 10 with respect to active layer 12 and arrayed two-dimensionally along a surface substantially parallel to active layer 12. Each of structural bodies 14a has width w1 along first direction x and width w2 along second direction y perpendicular to first direction x, width w1 along first direction x and width w2 along second direction y being different from each other in a cross section parallel to active layer 12.Type: GrantFiled: October 15, 2010Date of Patent: May 12, 2015Assignee: NEC CorporationInventors: Mizuho Tomiyama, Ryuichi Katayama
-
Publication number: 20150124223Abstract: An illumination device includes an image element configured to convert light incident thereon to image light and to output the image light, a first light path extending to pass through the image element, and a second light path extending without passing through the image element. The first light path and the second light path are configured to project lights passing therethrough, respectively, on an object existing outside the illumination device.Type: ApplicationFiled: October 29, 2014Publication date: May 7, 2015Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Kentaro YAMAUCHI, Atsushi MOTOYA, Ryo KAWAMURA