LIGHTING DEVICE HAVING DIFFERENT OLEDS IN SERIES AND SHUNTING SWITCH FOR SUBSET OF OLEDS
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United States of America Patent
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app pub date -
Nov 29, 2015
filing date -
May 30, 2013
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Abandoned
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Abstract
A lighting device is described. The lighting device 10 comprises at least a first OLED module 14a, 14b with a first OLED element 28a and a second OLED module 16a, 16b, 16c with a second OLED element 28b. The OLED elements include a front surface for emitting light, and a back surface. The front surfaces of the first and second OLED elements have different size. A power supply circuit 38 supplies a series operating current IS. The OLED modules 14a, 14b, 16a-c, are electrically connected in series to the power supply circuit 38 to be operated by the series operating current IS. In order to efficiently operate different OLED elements within the lighting device, an adjustment circuit 40 is provided to adjust a second operating current I2 supplied to the second OLED element 28b to a current value below a current value of the series operating current IS.
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