US 12,074,409 B2
Laser diode drive method and arrangement
Robert N. Stark, Saratoga, CA (US)
Assigned to Prysm Systems, Inc., Milpitas, CA (US)
Filed by Prysm Systems, Inc., Milpitas, CA (US)
Filed on Mar. 8, 2021, as Appl. No. 17/194,763.
Application 17/194,763 is a continuation of application No. 16/528,283, filed on Jul. 31, 2019, granted, now 10,944,239, issued on Mar. 9, 2021.
Claims priority of provisional application 62/714,027, filed on Aug. 2, 2018.
Prior Publication US 2021/0210927 A1, Jul. 8, 2021
Int. Cl. H01S 5/042 (2006.01); G09G 3/32 (2016.01); H01S 5/026 (2006.01)
CPC H01S 5/0428 (2013.01) [G09G 3/32 (2013.01); H01S 5/0261 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An arrangement, comprising:
a resistor arranged in parallel to a laser diode, wherein the arrangement is configured to receive current at the resistor and reduce current of the laser diode such that the current of the laser diode approaches zero while the current is applied to the resistor, wherein the arrangement is configured such that the current is applied in a pre-charge process, and wherein the pre-charge process comprises applying a first pulse in a burst of pulses, wherein the first pulse in the burst occurs after a sustained off period to fail to illuminate a pixel, and wherein the first pulse illuminates a pixel after the sustained not illuminated off period.