Title:
LIGHTING DEVICE WITH THERMALLY VARIABLE REFLECTING ELEMENT
Document Type and Number:
WIPO Patent Application WO/2010/035171
Kind Code:
A3
Abstract:
The invention provides a lighting device (100) comprising a light source (10) arranged to generate light source light (11), an optional luminescent material and a thermally variable reflecting element (60). The optional luminescent material (205) is arranged downstream of the light source (10) and is arranged to convert at least part of the light source light (11) into luminescent material light (211). One or more of the light source (10) and the optional luminescent material (205) generate heat when the light source (10) generates light source light (11). The thermally variable reflecting element (60) is arranged downstream of the light source (10) and the optional luminescent material (205). The thermally variable reflecting element (60) has a first state wherein it is substantially reflecting and a second state wherein it is substantially transparent; heat induces a chance from the first state to the second state. The thermally variable reflecting element (60) is arranged to transmit at least part of one or more selected from the group consisting of the light source light (11) and optional luminescent material light (211) when being in the second state. The lighting device (100) is arranged to transport heat generated by one or more of the light source (10) and the optional luminescent material (205) to the thermally variable reflecting element (60).
Inventors:
VAN BOMMEL TIES (NL)
HIKMET RIFAT A M (NL)
HIKMET RIFAT A M (NL)
Application Number:
PCT/IB2009/054041
Publication Date:
May 20, 2010
Filing Date:
September 16, 2009
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
VAN BOMMEL TIES (NL)
HIKMET RIFAT A M (NL)
VAN BOMMEL TIES (NL)
HIKMET RIFAT A M (NL)
International Classes:
F21V14/00; F21V9/40; F21V29/505; F21Y101/02
Foreign References:
| US3648280A | 1972-03-07 | |||
| US5083251A | 1992-01-21 | |||
| US6056421A | 2000-05-02 |
Attorney, Agent or Firm:
BEKKERS, Joost, J., J. et al. (AE Eindhoven, NL)
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