Light source driving device
US4928248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | May 3, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/06216
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light source driving device for driving a light source such as a semiconductor laser comprises an input voltage generating section for superposing a pulse voltage on a predetermined DC voltage to provide an input voltage, a voltage converting section having an inductor and a step recovery diode, and a driving section having a delay element. The voltage converting section applies the input voltage through the inductor to the step recovery diode to provide a very short pulse voltage. The driving section applies the very short pulse voltage to the light source, and the delay element delays the very short pulse voltage, inverts the polarity thereof, and applies the inverted very short light pulse to the light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.