Patent ID: 8026672

Claim:
A light emitting device comprising: a first plurality of light emitters comprising a first group and a second group, wherein said first group is connectable in series to said second group; a first driver connected to said first group; a second driver connectable to said second group; a first voltage comparator coupled to said first driver, wherein said voltage comparator compares the voltage of said first driver to a predetermined voltage; wherein said light emitting device is in a first state when the voltage of said first driver is less than said predetermined voltage; wherein said light emitting device is in a second state when the voltage of said first driver is greater than said predetermined voltage; wherein when said light emitting device is in said first state, said first group is connected in series with said second group to form a series circuit between said first driver and a reference voltage; and wherein when said light emitting device is in said second state, said first group is connected between said first driver and said reference voltage and said second group is connected between said second driver and said reference voltage.