Patent · US Active

Actuation device for a laser diode, laser projection system and method for speckle reduction in a laser diode

US9065240B2 · kind B2 · utility

2Cited by

1References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Juergen Seidel · Schorndorf, DE
Reinhold Fiess · Durbach, DE
Juergen Hasch · Stuttgart, DE
Annette Frederiksen · Renningen, DE

Key dates

Filing date	Jan 25, 2013
Grant date	Jun 23, 2015
Priority date	—
Expiry date	Jan 25, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH01S2301/02
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An actuation device for a laser diode includes: a first driver device which is set up to generate a high-frequency modulated actuation signal and to feed the signal into the laser diode for speckle suppression, and an evaluation circuit, which is coupled with the first driver device, and which is set up to output to the first driver device an intensity signal indicating the intensity of the light emitted by the laser diode and a control signal as a function of the intensity signal in order to regulate the high-frequency modulated actuation signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.