| 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 |
