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41. 发明专利

GB2496184A Illumination system 未知
公开(公告)号：GB2496184A
公开(公告)日：2013-05-08
申请号：GB201119112
申请日：2011-11-05
申请人： OPTOVATE LTD
发明人： WOODGATE GRAHAM JOHN , HARROLD JONATHAN
IPC分类号： H05B37/02 , H05B44/00
摘要： An illumination system comprises an array of light emitting elements, such as LEDs, an array of directional optical elements and a light deflecting means 4 arranged to provide a fan of light cones 6, 8, 10, 12, 14. A position detector 20 senses the retroreflection from an observer's eyes 16, 19 or other facial features and, in response, a control system 24, 26 controls the appropriate light emitting element or elements so as to reduce the intensity of light directed towards the retroreflection region. Such a system achieves glare reduction for a line-of-sight illumination apparatus.

42. 发明专利

GB2496183A Illumination apparatus 未知
公开(公告)号：GB2496183A
公开(公告)日：2013-05-08
申请号：GB201119111
申请日：2011-11-05
申请人： OPTOVATE LTD
发明人： WOODGATE GRAHAM JOHN , HARROLD JONATHAN
IPC分类号： H01L25/16 , H01L25/04 , H01L27/15 , H01L27/32
摘要： An illumination apparatus comprises an array of inorganic light emitting elements which is formed by selectively removing inorganic light emitting diodes (LEDs) from an array formed on a monolithic wafer and preserving the relative spatial positions of the diodes then forming an array of the selectively removed inorganic LEDs whilst maintaining the relative spatial positions, so that the inorganic LEDs 6, 8 are interspersed in gaps within an array of organic light emitting diodes (OLEDs) 4, positioned within apertures within OLEDs (see Fig. 6a), or formed on the surface of a continuous layer of OLEDs (see Fig. 7) the inorganic LEDs and OLEDs sharing a common substrate 2. There may be more than one array of inorganic LEDs 6, 8, each with different wavelength characteristics. The inorganic light emitting elements 6, 8 are provided at reduced density compared to the organic light emitting elements, achieving high efficiency, long lifetime and high uniformity for white light illumination over a large area.

44. 发明专利

GB2469693A A controllable light directional distributor for an illumination apparatus 未知
公开(公告)号：GB2469693A
公开(公告)日：2010-10-27
申请号：GB0907146
申请日：2009-04-25
申请人： OPTOVATE LTD
发明人： WOODGATE GRAHAM JOHN , HARROLD JONATHAN
IPC分类号： G02F1/139
摘要： A light directional distributor comprises a first lenticular lens structure 104, a second lenticular lens structure 106, and a layer 105 of electrically controllable birefringent material positioned between the two structures. Each structure has a plurality of lenticular elements. The birefringent layer's director orientation is electrically controlled by means of electrodes. The refractive indices of the three parts of the distributor are such that for incident light of a first polarisation the first lenticular lens structure and the birefringent layer cooperate to control the light directional distribution. The second lenticular lens structure then cooperates with the birefringent layer to further control the light directional distribution. The birefringent layer may be liquid crystal.

45. 发明专利

GB2463954A LED array fabrication 未知
公开(公告)号：GB2463954A
公开(公告)日：2010-04-07
申请号：GB0906714
申请日：2009-04-18
申请人： OPTOVATE LTD
发明人： WOODGATE GRAHAM JOHN , HARROLD JONATHAN
IPC分类号： H01L25/075 , H05B44/00
摘要： The LEDs (72,74) are fabricated as a monolithic structure on a semiconductor wafer and are separated by sawing, cutting etc. Selected non-adjacent LEDs are removed from the diced monolithic wafer and transferred to a heat dissipating substrate in a single process step whilst maintaining their relative positions and separations. An array of lenses 122, 124 or reflectors is also transferred onto the LED assembly formed on the heat dissipating substrate. The LEDs typically have dimensions of 25-100 microns which reduces losses due to internal reflection and increases light output. The density of the LED assembly on the heat dissipating substrate is smaller than the density of the LEDs as formed on the monolithic wafer, maintaining the relative positions and orientations of the transferred LEDs in this way ensures that heat can be effectively removed from the LEDs. The manufacturing efficiency is improved in comparison with conventional pick and place techniques where individual LEDs from the monolithic wafer are selected and transferred to an LED array substrate in a sequential manner.

46. 发明专利

GB0817917D0 Illumination apparatus 未知
公开(公告)号：GB0817917D0
公开(公告)日：2008-11-05
申请号：GB0817917
申请日：2008-10-01
申请人： OPTOVATE LTD
IPC分类号： H05B44/00
摘要： An illumination apparatus and method of manufacture of the same in which an array of light-emitting elements (218) is aligned to an array (220) of optical elements to achieve a thin and efficient light source that can also be arranged to provide directional and/or programmable illumination.

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