Communications: electrical – Visual indication
Reexamination Certificate
2005-06-21
2005-06-21
Goins, Davetta W. (Department: 2632)
Communications: electrical
Visual indication
C340S815430, C340S815450, C340S815530, C340S815650, C345S082000, C345S589000, C315S291000, C362S086000
Reexamination Certificate
active
06909377
ABSTRACT:
Illumination device with light emitting diodes (LED) and an LED support element on which a number of light pixels are arranged which emit light are disclosed. The light pixels each comprise a number of LEDs with emission wavelengths suitable for additive color mixing of the light from the light pixels. A controller is provided on the LED support element, for setting a color temperature and intensity parameter of the additively color mixed light of each individual light pixel. The controller assigns electrical LED currents to the color temperature and intensity parameters and controls the LEDs in the light pixels using the assigned LED currents. Control devices measure the color temperature and intensity of the emitted light of at least one light pixel, compare the measured and the pre-set color temperature and intensity parameters of the light pixel and in the case of a difference in the measured and pre-set color temperature and intensity parameters regulates the controller such that the emitted light from the light pixel has the pre-set color temperature and intensity parameters.
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Arnold & Richter Cine Technik GmbH & Co. Betriebs KG
Goins Davetta W.
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