Light output device and control method
First Claim
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1. A light output device, comprising:
- a plurality of light source units arranged in a laminated glass structure for emitting light, wherein the light source units are arranged between a top glass plate and a bottom glass plate bonded to form the laminated glass structure,a plurality of compound parabolic concentrators for pre-collimating the light emitted by the light source units, anda plurality of switchable liquid crystal-based devices arranged to alter the beam shapes of light emitted by the light source units, wherein the top glass plate forms a transparent element, having a fixed refractive index, of each switchable liquid crystal-based device.
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Abstract
The present invention relates to a light output device (10) comprising a plurality of light source units (18) arranged in a laminated glass structure. The light output device is characterized by a plurality of switchable liquid crystal-based (24) devices arranged to alter the beam shapes of light emitted by the light source units when in a beam shape altering mode. The present invention also relates to a method for controlling a light output device.
7 Citations
3 Claims
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1. A light output device, comprising:
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a plurality of light source units arranged in a laminated glass structure for emitting light, wherein the light source units are arranged between a top glass plate and a bottom glass plate bonded to form the laminated glass structure, a plurality of compound parabolic concentrators for pre-collimating the light emitted by the light source units, and a plurality of switchable liquid crystal-based devices arranged to alter the beam shapes of light emitted by the light source units, wherein the top glass plate forms a transparent element, having a fixed refractive index, of each switchable liquid crystal-based device. - View Dependent Claims (2, 3)
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Specification
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Current AssigneeSignify Holding B.V. (Signify N.V.)
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Original AssigneeKoninklijke Philips N.V.
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InventorsWang, Lingli, De Boer, Dirk Kornelis Gerhardus
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Primary Examiner(s)Glick, Edward
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Assistant Examiner(s)CHUNG, DAVID Y
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Application NumberUS12/595,639Publication NumberTime in Patent Office2,153 DaysField of Search349 61- 65, 349/69, 362/612US Class Current349/69CPC Class CodesB32B 17/10036 comprising two outer glass ...B32B 17/10541 comprising a light source o...B32B 17/10761 containing vinyl acetalF21S 10/02 changing colors F21S10/002 ...F21V 14/003 by interposition of element...F21Y 2115/10 Light-emitting diodes [LED]
