TIME DIVISION LIGHT OUTPUT SENSING AND BRIGHTNESS ADJUSTMENT FOR DIFFERENT SPECTRA OF LIGHT EMITTING DIODES
First Claim
1. An apparatus comprising:
- a controller configured to at least adjust brightness of light emitted from a first light emitting diode (LED) and adjust brightness of light emitted from a second LED, wherein, during operation of the controller, the light emitted from the first LED has a different spectrum than the light emitted from the second LED and the controller is further configured to at least;
i. receive a first signal indicating a brightness of received light at a first time;
ii. receive a second signal indicating a brightness of the received light at a second time, wherein a relative contribution to the brightness from the first and second LEDs is different for the first and second times;
iii. determine the brightness of light emitted from the first LED and the brightness of light emitted from the second LED using information from the signals; and
iv. adjust the brightness of the light emitted from the first LED and the brightness of the light emitted from the second LED in accordance with one or more brightness related target values.
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Accused Products
Abstract
In at least one embodiment, brightness multiple LEDs is adjusted by modifying power to subgroups of the multiple LEDs during different times and detecting the brightness of the LEDs during the reductions of power. In at least one embodiment, once the brightness of the LEDs are determined, a controller determines if the brightness meet target brightness values, and, if not, the controller adjusts each LED with the goal meet the target brightness values. In at least one embodiment, a process of modifying power to the subgroups of multiple LEDs over time and adjusting the brightness of the LEDs is referred as “time division and light output sensing and adjusting. Thus, in at least one embodiment, a lighting system includes time division light output sensing and adjustment for different spectrum light emitting diodes (LEDs).
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Citations
40 Claims
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1. An apparatus comprising:
a controller configured to at least adjust brightness of light emitted from a first light emitting diode (LED) and adjust brightness of light emitted from a second LED, wherein, during operation of the controller, the light emitted from the first LED has a different spectrum than the light emitted from the second LED and the controller is further configured to at least; i. receive a first signal indicating a brightness of received light at a first time; ii. receive a second signal indicating a brightness of the received light at a second time, wherein a relative contribution to the brightness from the first and second LEDs is different for the first and second times; iii. determine the brightness of light emitted from the first LED and the brightness of light emitted from the second LED using information from the signals; and iv. adjust the brightness of the light emitted from the first LED and the brightness of the light emitted from the second LED in accordance with one or more brightness related target values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus comprising:
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a lamp having at least a first light emitting diode (LED) and a second LED, wherein, during operation, light output of the first LED has a different spectrum than light output from the second LED; one or more sensors to sense brightness of received light; and a controller coupled to the lamp and the sensor, wherein the controller is configured to at least; i. receive a first signal from at least one of the sensors indicating a brightness of the received light at a first time; ii. receive a second signal from at least one of the sensors indicating a brightness of the received light at a second time, wherein a relative contribution to the brightness from the first and second LEDs is different for the first and second times; iii. determine the brightness of light emitted from the first LED and the brightness of light emitted from the second LED using information from the signals; and iv. adjust the brightness of the light emitted from the first LED and the brightness of the light emitted from the second LED in accordance with one or more brightness related target values. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method to at least adjust brightness of light emitted from a first light emitting diode (LED) and adjust brightness of light emitted from a second LED, wherein the light emitted from the first LED has a different spectrum than the light emitted from the second LED, the method comprising:
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receiving a first signal indicating a brightness of received light at a first time; receiving a second signal indicating a brightness of the received light at a second time, wherein a relative contribution to the brightness from the first and second LEDs is different for the first and second times; determining the brightness of light emitted from the first LED and the brightness of light emitted from the second LED using information from the signals; and adjusting the brightness of the light emitted from the first LED and the brightness of the light emitted from the second LED in accordance with one or more brightness related target values. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification