Dynamic color mixing LED device
AssigneeDialight Corporation
InventorGarrett J. Young
Life of this patent
Estimating the term…
Abstract
A dynamic color mixing LED device that includes a plurality of light emitting diode units. Each light emitting diode unit includes e.g. a first LED of a first color (e.g. red) and a second LED of a second color (e.g. green). A third LED of a third color (e.g. blue can also be provided). A controller supplies respective driving signals to each of the first LED, second LED, and third LEDs individually. The respective driving signals individually control relative intensity outputs of the respective first LED, second LED, and third LED. With such an individual control each of the light emitting diode units can be controlled to output different color signals.
Claims18
A dynamic color mixing device comprising:
- (a) at least one light emitting diode (LED) unit each including:
- (a1) a first LED of a first color;
- and
- (a2) a second LED of a second color;
- (b) a controller configured to supply respective driving signals to each of said first LED and second LED individually, said respective driving signals individually controlling relative intensity outputs of said respective first LED and second LED;
- and
- (c) a temperature sensor configured to sense a temperature at at least a portion of said at least one LED unit, and
- wherein said controller further monitors the sensed temperature of said at least one LED unit and integrates a current supplied to said at least one LED unit, and controls the amplitude modulation based on the monitored temperature and integrated current, to maintain a constant color intensity and chromaticity over time and ambient temperatures.
A dynamic color mixing device comprising:
- (a) at least one light emitting diode (LED) unit each including:
- (a1) a first LED of a first color;
- and
- (a2) a second LED of a second color;
- (b) means for supplying respective driving signals to each of said first LED and second LED individually, said respective driving signals individually controlling relative intensity outputs of said respective first LED and second LED;
- and
- (c) means for sensing a temperature at at least a portion of said at least one LED unit. and
- wherein said means for supplying further monitors the sensed temperature of said at least one LED unit and integrates a current supplied to said at least one LED unit, and controls the amplitude modulation based on the monitored temperature and integrated current, to maintain a constant color intensity and chromaticity over time and ambient temperatures.
Dependencies are inferred from the claim text.