Patent application number | Description | Published |
20080279541 | Optical Device and Light Source - An optical device directs light from a light source to a region of space, such as the field of view of a camera when the optical device is used as a camera flash unit. This device includes a first optical element which converges light from the light source towards an inner portion of the region to be illuminated and a second optical element which diverges part of the light from the first element outwardly towards an outer portion of the region to be illuminated so as to achieve adequate central illumination with improved uniformity of illumination across the region to be illuminated. The second optical element may have a concave multiple-faceted surface comprising plane facets in the shape of an open-base inverted truncated pyramid, contiguous sector-shaped facets, at least some of which are concave, or a face divided into an elongate portion disposed between first and second diverging portions. | 11-13-2008 |
20100061087 | BACKLIGHT AND DISPLAY - A backlight is provided for a direct-view display. The backlight comprises a plurality of discrete light sources ( | 03-11-2010 |
20100110340 | DISPLAY - A display comprises: a transmissive pixellated spatial light modulator ( | 05-06-2010 |
20100142223 | BACKLIGHT AND DISPLAY - A backlight is provided for illuminating an at least partially transmissive display. The backlight includes a light source. A light guide receives the light from an edge surface and guides the light by total internal reflection. Groove structures which are located on at least one of the major surfaces of the light guide permit redistribution of light around obstacles that may be present within the light guide structure, thereby maintaining brightness uniformity of the backlight or illumination panel. | 06-10-2010 |
20100157577 | BACKLIGHT AND DISPLAY - A backlight is provided for a transmissive spatial light modulator such as a liquid crystal device ( | 06-24-2010 |
20100182294 | SOLID STATE ILLUMINATION SYSTEM - An illumination system comprises at least two light sources ( | 07-22-2010 |
20100238367 | LIGHT OUTPUT ARRANGEMENT AND DISPLAY - A light output arrangement is provided and may be used as a backlight for a display. The arrangement comprises a bendable light-outputting layer ( | 09-23-2010 |
20100289983 | OPTICAL DEVICE, MATERIAL FOR FORMING OPTICAL DEVICE, BACKLIGHT FOR DISPLAY, DISPLAY AND METHOD OF MAKING DEVICE OR MATERIAL - An optical device is provided, for example for use as a brightness enhancing film in a display. The device comprises a sheet ( | 11-18-2010 |
20110123184 | CAMERA FLASH, A CAMERA, AND A METHOD OF GENERATING A FLASH - A camera flash comprises a light guide arranged to extract light at least through one surface; and one or more light sources arranged, in use, to emit light into the lightguide. Each light source is an LED or a laser diode. The camera flash is connectable, in use, to drive circuitry, the drive circuitry being for driving the light source(s) to emit a pulse of light. The waveguide spreads out the light from the light source(s), so that a flash of light from the camera flash does not present a safety risk, while minimising loss of the light from the light source(s). The camera flash can thus provide a high overall optical output, spread over an extended area (as defined by the waveguide). The lightguide may for example be disposed around a camera module of a mobile telephone camera. | 05-26-2011 |
20110128471 | ILLUMINATION PANEL AND DISPLAY - An illumination panel is provided, for example for use as a backlight for illuminating an at least partially transmissive display ( | 06-02-2011 |
20110151928 | METHOD OF AND APPARATUS FOR ACQUIRING AN IMAGE - An apparatus for acquiring an image comprises a display ( | 06-23-2011 |
20120133624 | DISPLAY PANEL - A display panel incorporates the functionality to determine the three dimensional position of a light reflecting or emitting object ( | 05-31-2012 |
20120287669 | BACKLIGHT, AND DISPLAY HAVING A BACKLIGHT - A display backlight comprises a light guide plate ( | 11-15-2012 |
20130010492 | LAMP COMPRISING A PHOSPHOR, RADIATION SOURCE, OPTICAL SYSTEM AND HEATSINK - A lamp comprises a thin layer of phosphor ( | 01-10-2013 |
20130320863 | LIGHTING DEVICE AND A LIGHTING SYSTEM - A lighting device comprises a plurality of light sources ( | 12-05-2013 |
20140029279 | HEADLIGHT SYSTEM INCORPORATING ADAPTIVE BEAM FUNCTION - A light source system comprising projection optics, which are capable of producing a far-field image of a light source. The light source comprises a fluorescent medium that when illuminated by light from laser emitters of a first waveband emits light of a second or more wavebands of longer wavelength. The resulting light emission produces a colour perceived as white. The light source is illuminated by a plurality of laser emitters arranged to illuminate the light source in an array-like manner. Control of the output of one or more of the laser emitters results in a variation of the spatial emission distribution from the light source and hence a variation of the far-field beam spot distribution. Further, fine variation of the far-field beam spot distribution may be achieved by re-direction of the laser beams by separate control methods. | 01-30-2014 |
20140029280 | HEADLIGHT SYSTEM INCORPORATING ADAPTIVE BEAM FUNCTION - A light source system comprising a projection lens, which is capable of producing a far-field image of a light source. The light source comprises a photoluminescent material that when illuminated by light from laser emitters of a first waveband emits light of a second or more wavebands of longer wavelength. The resulting light emission produces a colour perceived as white. The light source is illuminated by a plurality of laser emitters arranged to illuminate the light source in an array-like manner from the front side. Control of the output of one or more of the laser emitters results in a variation of the spatial emission distribution from the light source and hence a variation of the far-field beam spot distribution via non-mechanical means. An optical system is arranged to image light emitted from the photoluminescent material into the far-field, which optical system comprises a converging lens. | 01-30-2014 |
20140029281 | LIGHT SOURCE FOR AN AUTOMOTIVE HEADLIGHT WITH ADAPTIVE FUNCTION - A light source system operable in at least first and second modes to provide at least and first and second different far field illumination patterns, the system comprising: a photoluminescent material; and a light beam generator for generating, in the first mode, a first set of light beams for illuminating respective first regions of the photoluminescent material and for generating, in the second mode, a second set of light beams for illuminating respective second regions of the photoluminescent material, the first and second sets of light beams being independently controllable. In the first mode, the light beam generator generates the first set of light beams such that a first beam of the first set of light beams illuminates a first illumination region of the photoluminescent material having one side that is inclined with respect to another side of the illumination region. | 01-30-2014 |
20140340918 | LASER AND PHOSPHOR BASED LIGHT SOURCE FOR IMPROVED SAFETY - A light source system comprising an optical system which is arranged to project light from a light source into the far-field. The light source comprises a mixture of fluorescent materials which are sensitive to one of two wavebands in either the UV or blue part of the spectrum. The combination of the light emitted from both sets of fluorescent materials combined such that the resulting colour is perceived as white. The light source is illuminated by a plurality of laser emitters comprised of both emitters ( | 11-20-2014 |
20140362600 | HEADLIGHT SYSTEM INCORPORATING ADAPTIVE BEAM FUNCTION - A light source system comprising projection optics, which are capable of producing a far-field image of a light source. The light source comprises a fluorescent medium that when illuminated by light from laser emitters of a first waveband emits light of a second or more wavebands of longer wavelength. The resulting light emission produces a colour perceived as white. The light source is illuminated by a plurality of laser emitters arranged to illuminate the light source in an array-like manner. Control of the output of one or more of the laser emitters results in a variation of the spatial emission distribution from the light source and hence a variation of the far-field beam spot distribution via non-mechanical means. | 12-11-2014 |