Patent ID: 9580644
Date: 2017-02-28
CPC Classifications: C09K,F21W,F21Y,G02B

Claim:
1. A front-light, transparent illumination device for illuminating a surface, the device comprising: a first plurality of lighting elements, each lighting element being configured to emit light; a second plurality of lighting elements, each lighting element being configured to emit light; an illuminating body, comprising a light extraction layer configured to receive light emitted by the first and the second plurality of lighting elements and to deflect the received light to a surface of the illumination device to thereby illuminate an object; a controller, configured to control the first and the second plurality of lighting elements to emit light respectively; wherein the illuminating body further comprises a plurality of illuminating sub-areas, each illuminating sub-area corresponding to lighting elements selecting from the first plurality of lighting elements or from the second plurality of lighting elements; and, wherein the object being illuminated is observable by a user viewing the object through the illumination device.