LED SYSTEM FOR PRODUCING LIGHT
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Abstract
The invention relates to a system comprising a plurality of light emitting diodes, LEDs. The LEDs may be controlled in various in various manners in order to obtain any of one or more objects of the system. Thus, LEDs may be controlled for by controlling at least two of the following parameters: the luminous intensity of each of the LEDs, the luminous flux of each of the LEDs, the colour spectrum of the light being emitted from each of the LEDs, the spatial radiation pattern of the light being emitted from each of the LEDs, the spatial radiation pattern of the system, the junction temperature of each of the LEDs, the temperature of the surroundings to the LED, the amperage of the electrical power being supplied each or sections of the LEDs, the voltage of the electrical power being applied the LEDs and pulsing applied to the electrical power being applied each or sections of the LEDs.
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Citations
73 Claims
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1-57. -57. (canceled)
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58. A method for controlling light being emitted from a light-emitting system comprising a plurality of light emitting diodes, LEDs, said method comprising controlling at least all of the following parameters:
- the temperature of the surroundings of each of the LEDs, the luminous flux of each of the LEDs, and an electrical power being supplied to each of the LEDs, and where controlling the surrounding temperature controls the luminous intensity being emitted from the system, thus controlling the luminous flux of the LEDs, and does not decrease the lifetime of the LEDs by the current of the electrical power not being increased during the lifetime of the LEDs.
- View Dependent Claims (59, 60)
- 61. A system comprising a plurality of LEDs for producing light, wherein each or sections of the LEDs are emitting light at different wavelengths and said system further controlling the luminous flux of each or sections of the LEDs separately, and said system further controlling the luminous flux of the overall system comprising a plurality of LEDs by means of both controlling the surrounding temperature, either of each of the LEDs or commonly of all of the LEDs, and by means of controlling an electrical power being supplied to each of the LEDs, and where controlling the electrical power consists in not increasing the current during the lifetime of the LEDs for thereby not decreasing the lifetime of the LEDs.
Specification