Patent ID: 7646154

Claim:
A light emitting apparatus, the apparatus comprising: a plurality of first light emitting parts which are connected with each other in series and a plurality of second light emitting parts connected with each other in series; a first and second current supply for supplying a first and second current to the plurality of first and second light emitting parts, respectively; and a plurality of first switches respectively connected in parallel with the plurality of first light emitting parts for selectively bypassing the first current supplied to the first light and a plurality of second switches respectively connected in parallel with the plurality of second light emitting parts for bypassing the second light emitting parts, wherein; a controller for receiving brightness information corresponding to each of the plurality of first and second light emitting parts and for controlling the plurality of first and second switches to make an overall light emitting time of each of the plurality of first and second light emitting parts within desired time intervals correspond to a brightness level of the brightness information.