Patent ID: 8368316
Filing Date: 2013-02-05
Classification: H05B

Abstract:
1. A LED circuit comprising: a plurality of LED channels; a driving module to supply a driving voltage to the plurality of LED channels according to a feedback voltage; and a feedback-selecting module comprising: a minimum-selecting unit to perform a selection mechanism to select a minimum output voltage as the feedback voltage from the output voltage of each of the plurality of non-open LED channels, wherein the minimum-selecting unit comprises: a plurality of inputs, wherein a first part of the inputs corresponding to the non-open LED channels are connected to the non-open LED channels to receive the output voltage respectively and a second part of the inputs corresponding to the open LED channels are connected to a high voltage higher than a predetermined value respectively when the selection mechanism is performed; and a comparing module, wherein the selection mechanism is performed according to a comparison result of the output voltages of the plurality of non-open LED channels with the comparing module.