Patent application number | Description | Published |
20080205459 | LIGHT SOURCE DEVICE AND PROJECTOR - A light source device includes a plurality of light emission sections disposed in parallel with an interval, wherein the interval for the light emission sections near each end portion in an array of the light emission sections is narrower than the interval near a center portion in the array. | 08-28-2008 |
20080253412 | Light source, and image display apparatus, monitoring apparatus, and illumination apparatus using the same - A light source that emits light includes light source units, each emitting a plurality of light beams parallel to one another, the plurality of light beams including first and second light beams, and a beam distance adjustment element that is an optical element made of a light-transmissive material. The beam distance adjustment element is configured to adjust the distance between the first and second light beams. The beam distance adjustment element includes a first incidence plane on which the first light beam is incident, a first exit plane that is parallel to the first incidence plane and from which the first light beam exits, a second incidence plane on which the second light beam is incident, and a second exit plane that is parallel to the second incidence plane and from which the second light beam exits. The first and second light beams intersect in the beam distance adjustment element. | 10-16-2008 |
20090033884 | Projector - A projector that includes a laser beam source that outputs a laser beam that is modulated based on an image signal and a screen on which the light beam is projected. The projector also includes a scanning unit that scans the laser beam within a predetermined surface and a scan monitoring unit that monitors scanning of the scanning unit and outputs a result of the monitoring. The projector further includes a beam light supply stopping unit that controls the laser beam source so as to stop output of the laser beam based on the result of monitoring output by the scan monitoring unit. | 02-05-2009 |
20090059992 | LIGHT SOURCE DEVICE, IMAGE DISPLAY DEVICE, AND MONITOR DEVICE - A light source device includes a plurality of light emitting elements for emitting light beams, a resonant mirror functioning as a resonator for selectively reflecting the light beams emitted respectively from the light emitting elements, towards the light emitting elements, a wavelength selection element disposed on light paths between the light emitting elements and the resonant mirror, having a plurality of light selection areas for executing selection respectively on the light beams emitted respectively from the light emitting elements, transmitting light beams each having a part of a wavelength band of corresponding one of the light beams emitted respectively from the light emitting elements, and having a narrower width of a wavelength band of the light beam to be transmitted than a width of wavelength band of the light beam to be reflected by the resonant mirror, and a state changing section that changes a state of the plurality of light selection areas, and the state changing section changes the state of the light selection areas so that wavelengths of the light beams selected respectively by the light selection areas become different from each other. | 03-05-2009 |
20090195872 | Screen and projection system - A screen includes a plurality of reflecting portions disposed on a flat surface with a clearance left between one another. The reflecting portions reflect diagonal incident light coming in a predetermined direction other than the normal line direction of the flat surface, and block the diagonal incident light by reflecting the incident light such that the incident light cannot reach each area between the adjoining reflecting portions on the flat surface. | 08-06-2009 |
20140204438 | OPTICAL DEVICE AND IMAGE DISPLAY APPARATUS - An optical device includes a light-conducting member, having a first panel surface disposed facing an image forming unit, that conducts image light incident on a light entry plane formed at an end of the first panel surface to a light exit plane formed in front of the viewer's eye; a first diffractive optics element, provided on the light entry plane, that diffracts the image light incident on the light entry plane in a predetermined direction and transmits that light into the light-conducting member; a second diffractive optics element, provided on the light exit plane, that diffracts the image light exiting from the light exit plane in a predetermined direction and transmits that light to the front of the viewer's eye; and one or more reflective planes disposed within a waveguide for the image light diffracted by the first diffractive optics element. | 07-24-2014 |
20140340749 | Display apparatus - In a display apparatus, image light emitted from an image forming device is incident on an image light incidence portion of a light guide member after being diffracted by a second diffractive optical element, and emitted from an image light emission portion after moving forward in the light guide member. The image light emitted from the image light emission portion is diffracted by a first diffractive optical element and reaches the eyes of an observer. On a position where unnecessary external light is made incident on the light guide member, an external light noise reduction element which has a polarizing member and the like is provided. For this reason, even when the unnecessary external light is made incident on the light guide member, it is possible to inhibit the unnecessary external light from reaching the eye of the observer. | 11-20-2014 |
20150062715 | OPTICAL DEVICE AND IMAGE DISPLAY APPARATUS - A first diffraction optical element is disposed on a light incident surface of a light guide, a second diffraction optical element is disposed on a light emitting surface of the light guide, and a reflection layer is disposed on an end surface of the light guide. A diffraction grating of the first diffraction optical element and a diffraction grating of the second diffraction optical element has an inclined portion respectively. The inclined portion of the first diffraction optical element and the inclined portion of the second diffraction optical element are inclined in same direction. | 03-05-2015 |