Laser driving circuit, laser driving method, projector apparatus and apparatus which uses laser light

摘要

Disclosed herein is a laser driving circuit, including: a plurality of laser driving video current generation circuits configured to generate a plurality of kinds of laser driving current for driving a plurality of laser light sources configured to emit laser light having wavelengths different from each other based on an inputted video signal; a high frequency superposition section configured to superpose a high frequency signal having a frequency higher than a frequency band of the video signal on the laser driving current generated by the laser driving video current generation circuits; and a waveform correction section configured to correct a waveform of the high frequency signal.

主权项

1. A laser driving circuit, comprising:
a plurality of current generation circuits configured to generate one or more laser driving currents for driving a plurality of laser light sources configured to emit laser light having wavelengths respectively based on an inputted video signal; a high frequency superposition section configured to superpose a high frequency signal having a frequency higher than a band of the video signal on the laser driving current generated by the current generation circuits; and a waveform correction section configured to correct a waveform of the high frequency signal, wherein the waveform correction section is configured from a duty adjustment circuit configured to adjust a duty of the high frequency signal within a range in which an amplitude of the high frequency signal crosses a respective threshold current of the laser light sources.