Abstract: The projection display apparatus according to the present disclosure includes: a light source part; a color separating mirror that separates light emitted from the light source part into a first color light and a second color light; a first light modulation element that modulates the first color light; a second light modulation element that modulates the second color light; a color combining prism unit that combines the first color light modulated by the first light modulation element and the second color light modulated by the second light modulation element; and a projection unit that projects combined light emitted from the color combining prism unit. The color combining prism unit includes four prisms and has two air gap faces that totally reflect or transmit light depending on the angle of incidence.
Abstract: The projection display apparatus includes a light source unit, a light deflector, a first light receiver, a second light receiver, and a calculator. The light deflector deflects at least part of incident light coming from the light source unit to a first optical path so as to produce a projection light, and deflects a remaining part of the incident light to a second optical path. The first light receiver receives the at least part of the incident light that has been reflected by the projection surface. The second light receiver receives the remaining part of the incident light. The calculator calculates a distance from the projection display apparatus to a projection surface based on light reception results obtained by the first light receiver receiving the at least part of the incident light and the second light receiver receiving the remaining part of the incident light.
Abstract: An aerial image display device is capable of changing a depth of a virtual image viewed by an observer without changing a distance between at least one display device and an optical element forming the virtual image. The aerial image display device includes a display device, optical elements, and a reflecting member. The optical elements are installed corresponding to different display regions of a display surface of the display device and sequentially arranged along the display surface in an observation direction of an observer. The optical element is installed obliquely with an angle of about 45° in a ?X direction when viewed from the display surface of the display device. The optical element is installed obliquely with an angle of about 45° in an X direction when viewed from the display surface of the display device.
August 31, 2016
Date of Patent:
July 2, 2019
Nippon Telegraph and Telephone Corporation
Motohiro Makiguchi, Arinobu Niijima, Narimune Matsumura, Kota Hidaka
Abstract: An image projection device for displaying an image onto a remote surface. The image projection device employs a scanner to project image beams of visible light and tracer beams of light onto a remote surface to form a display of the image. The device also employs a light detector to sense at least the reflections of light from the tracer beam pulses incident on the remote surface. The device employs the sensed tracer beam light pulses to predict the trajectory of subsequent image beam light pulses and tracer beam light pulses that form a display of the image on the remote surface in a pseudo random pattern. The trajectory of the projected image beam light pulses can be predicted so that the image is displayed from a point of view that can be selected by, or automatically adjusted for, a viewer of the displayed image.
Abstract: A free-form lens (for example a phase modulator, lens or deformable mirror) may be made to reproduce a light pattern specified by image data. Source regions on the free-form lens are mapped to target regions areas on an image. Areas of the source regions are adjusted to vary the amount of light delivered to each of the target regions. Adjustment of the source areas may be achieved using a L-BFGS optimization which preferably incorporates smoothness and curl regularizers. Embodiments apply parallel processing to obtain control values for a free form lens in real time or near real time. Apparatus may process image data and display an image by controlling a dynamically variable free form lens using the processed image data.
February 8, 2018
Date of Patent:
June 18, 2019
MTT Innovation Incorporated
Gerwin Damberg, Anders Ballestad, Raveen Kumaran, James Gregson
Abstract: A lighting apparatus includes an optical member with a diffractive optical element. The optical member is directly fixed on a substrate with plural lighting chips. When the lighting apparatus is applied to a laser diode module, the height and volume of the overall laser diode module are reduced. Consequently, the laser diode module is suitably applied to a small-size device.
Abstract: A display device of an autonomous vehicle is controlled based on data collected from sensors located in or on the vehicle. The display device is used to present one or more images to a driver and/or passengers of the autonomous vehicle. The display device can be, for example, a windshield and/or other window of the vehicle. Image data can be, for example, transformed to improve visual perception by passengers in the vehicle when the images are displayed on a curved shape of the windshield.
Abstract: A projection optical apparatus includes an optical system and a projection optic enclosure that accommodates the optical system. The optical system includes a first optical system on which the image light is incident, and the projection optic enclosure includes a first accommodation section that accommodates the first optical system and includes a flange section (supported section) supported by the image forming apparatus and a first wall section and a second wall section that face each other in a first direction (Y direction) that intersects the direction along a line that connects the flange section to the center of gravity of the projection optical apparatus.
Abstract: The purpose of the present invention is to provide a projection type image display apparatus which is simple in configuration, low in price, and improved in reliability and brightness of an illumination light source. The present invention is a projection type image display apparatus provided with: a lamp; a reflector that reflects a light flux emitted from the lamp; a collimating lens that collimates the light reflected by the reflector; a light modulation device that modulates the collimated light to output the modulated light; and a projection lens that projects the modulated light. The reflector is configured to prevent the lamp from being irradiated with the reflected light of the light flux emitted from the lamp, and the collimating lens is formed of one biconcave lens having concave surfaces on both the incident side and the exit side.
Abstract: A non-spherical projection display structure and system that can be optimized for the ergonomics of preferably one viewer inside the display structure or system. The structure or system is preferably for use with widescreen projectors. The non-spherical projection display structure and system creates a visual projection display and method of operating the display that has a wide horizontal and vertical field of view and uses a rear projected display structure having a projection screen surface with a thickness. The display structure has at least one section with a monotonically increasing or decreasing radius of curvature.
Abstract: A projector includes a casing, an optical engine module, and a heat dissipation module. The optical engine module is disposed in the casing. The heat dissipation module is disposed in the casing and includes a heat dissipation fin set. The heat dissipation fin set includes at least one heat dissipation fin and at least one turbulent structure. The heat dissipation fin has a surface. The surface includes a first turbulent region and a second turbulent region. The first turbulent region is adjacent to the second turbulent region. The turbulent structure is disposed at least one of the first turbulent region and the second turbulent region, and the turbulent structure protrudes from the surface. An opening is formed between a top end of the turbulent structure and the surface.
Abstract: A light source module including a blue laser light source, an adjusting light source, a wavelength conversion device, and a light combiner is provided. The wavelength conversion device is disposed on an optical path of a first blue beam provided by the blue laser light source and an optical path of an adjusting beam provided by the adjusting light source. When a first transmissive area of the wavelength conversion device is cut into the optical path of the first blue beam, the blue laser light source and the adjusting light source are simultaneously turned on. A transmission direction of the first blue beam passing through the first transmissive area is opposite to a transmission direction of the adjusting beam passing through the first transmissive area. The light combiner combines the first blue beam and the adjusting beam into a second blue beam. Moreover, a projection apparatus is provided.
Abstract: An illumination device is provided with a light source device including a first light-emitting element that emits a first pencil of rays, and a light shaping optical system including a first lens surface on which the first pencil of rays is incident. The first lens surface has a first free-form surface represented by Expression (1) in which x and y are used as variables. In Expression (1), in a case where h is set to a positive integer, the coefficient Cj of the x2h term is different from the coefficient Cj of the y2h term.
Abstract: This disclosure provides a laser speckle-removing optical component, including a beam-shrinking lens group and a diffusion sheet arranged on a laser emergent optical path, where the beam-shrinking lens group includes a first beam-shrinking lens and a second beam-shrinking lens, and the diffusion sheet is located between the first beam-shrinking lens and the second beam-shrinking lens, and a distance between the diffusion sheet and the first beam-shrinking lens is shorter than a focal length of the first beam-shrinking lens. The arrangement of the diffusion sheet between the first beam-shrinking lens and the second beam-shrinking lens is able to alleviate the accumulation phenomenon of dust particles on the diffusion sheet, therefore, alleviating light attenuation phenomenon, and prolonging the service life of the laser source. This disclosure also provides a double-color laser source, a three-color laser source and a laser projection equipment applying the above laser speckle-removing optical component.
December 27, 2017
Date of Patent:
April 2, 2019
HISENSE CO., LTD., HISENSE USA CORPORATION, HISENSE INTERNATIONAL CO., LTD.
Youliang Tian, Xianrong Liu, Qiang Wang
Abstract: Projector display systems comprising a light dimmer and first modulator are disclosed. The light dimmer may comprise an adjustable iris, adjustable light sources and/or LCD stack that is capable of lowering the luminance of the light source illuminated the first modulator. The first modulator may comprise a plurality of analog mirrors (e.g. MEMS array) and the second modulator may comprise a plurality of mirrors (e.g., DMD array). The display system may further comprise a controller that sends control signals to the light dimmer and first modulator. The display system may render a desired dynamic range for rendering a projected image by a combination of such control signals.
Abstract: An image generation device includes an image generator, a stationary unit, a movable unit, a driver, and a wiring board. The image generator receives light and generate an image. The movable unit includes a movable plate movably supported by the stationary plate of the stationary unit, the image generator mounted on the movable plate, and a diffusion heat radiator connected to the movable plate, to cool the image generator. The driver relatively moves the movable unit with respect to the stationary unit. The driver includes a driving coil disposed in the radiator and a driving magnet opposed to the coil. The wiring board is connected to the movable unit, to pass a current through at least the coil. A movable area of the wiring board in which the wiring board moves with movement of the movable unit does not overlap any of the coil and the magnet in plan view.
Abstract: Disclosed is a projector (1), comprising a projector body (10) with a lens (12), and a light reflection assembly (20) for adjusting a projecting direction of the lens (12). The light reflection assembly (20) comprises a reflective mirror (23), and the light reflection assembly (20) is provided to be rotatably connected with the projector body (10). During the rotation, a mirror face of the reflective mirror (23) always faces towards the lens (12), so that the reflective mirror (23) adjusts the angle of the projecting direction between the mirror face and the lens (12) with the rotation of the light reflection assembly (20), so as to adjust the projecting location of the lens (12) by means of the rotation of the reflective mirror (23), such that the projecting direction can be changed without moving the projector (1).
Abstract: An electronic device has a first device holder and a second device holder each having a heat generating device attached thereto, a first heat conductive plate and a second heat conductive plate which are connected to the first and second device holders, respectively, a first heat dissipating fin disposed by the side of the second device holder which is disposed adjacent to the first device holder, a second heat dissipating fin disposed adjacent to the first heat dissipating fin in the same direction as the first heat dissipating fin, two first heat pipes which connect the first device holder with the first heat dissipating fin so that heat can be conducted therebetween, and a second heat pipe which connects the second device holder and the second heat dissipating fin so that heat can be conducted therebetween and which is disposed between the two first heat pipes.
Abstract: An image generation device includes an image generator, a stationary unit, a movable unit, and a dustproof unit. The image generator receives light and generate an image. The stationary unit includes a first stationary plate and a second stationary plate opposed to the first stationary plate. The movable unit includes a movable plate movably supported between the first stationary plate and the second stationary plate, the image generator mounted on the movable plate. The dustproof unit includes a dustproof member between the first stationary plate and the movable plate. The dustproof member surrounds the image generator.
Abstract: A light source device comprising: a light source section which generates any one of blue light, red light, and green light; a phosphor which generates a fluorescence including the two colors other than the color of the light emitted from the light source section; a color-changing section which changes one of the two colors of the fluorescence emitted from the phosphor to another color regularly and irradiates it to the image-forming element; and a light path-switching section which switches a light path in which a fluorescence excited by the color light emitted from the light source section passes towards the color-changing section and a light path in which the color light emitted from the light source section passes towards the image-forming element regularly.