Patent ID: 8750341
Filing Date: 2014-06-10
Classification: G02B,H01S,H04N

Abstract:
1. A method for reducing speckle in light output from an optical signal generator comprising: generating a drive signal by modulating drive signal to a first magnitude, a second magnitude, and a third magnitude, the first magnitude is greater than a threshold current for the optical signal generator, the second magnitude is near, at or less than the threshold current for the optical signal generator, and the third magnitude is between the second magnitude and zero, wherein the modulating the drive signal to the first magnitude, the second magnitude, and the third magnitude occurs continuously during operation of the optical signal generator, and during a single pixel period, the signal is modulated to each of the first magnitude, the second magnitude, and the third magnitude; presenting the drive signal to an optical signal generator; and driving an optical signal generator using the drive signal to generate an optical signal, wherein periodically changing the drive signal from the first magnitude to the second magnitude and the third magnitude reduces speckle in the optical signal and when the drive signal is at the third magnitude, establishing the drive signal at the second magnitude before establishing the drive signal at the first magnitude to thereby reduce turn on delay.