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US 2013/0093331 A1Published application
Lamps
AssigneeLextar Electronics Corporation
InventorsFeng-Ling Lin, Po-Shen Chen, Hui-Ying Chen, Chun-Kuang Chen, Tung-Yu Chen
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Abstract
An embodiment of the invention provides a lamp comprising a control circuit and a light emitting device. The light emitting device comprises a plurality of light emitting units with different wavelengths. The control circuit calibrates a control signal according to an environment light to adjust a light spectrum of the light emitting device by controlling the luminance of each light emitting unit.
Claims18
A lamp, comprising:
- a light emitting device which comprises a plurality of light emitting units with different wavelengths;
- and
- a control circuit which calibrates a control signal according to an environment light, to adjust a light spectrum of the light emitting device by controlling the luminance of each light emitting unit.
A lamp, comprising:
- a light emitting device which comprises a green light emitting unit, a cyan light emitting unit and a red light emitting unit;
- and
- a control circuit which adjusts the luminance of the green light emitting unit, the cyan light emitting unit and the red light emitting unit according to an environment light signal related to environment light, wherein when a luminance of the environment light is increased, the control circuit reduces a first luminance of the cyan light emitting unit and increases a second luminance of the green light emitting unit, and when the luminance of the environment light is reduced, the controls circuit increases the first luminance of the cyan light emitting unit and reduces the second luminance of the green light emitting unit.
Dependencies are inferred from the claim text.