发明名称 |
Optical pickup apparatus, integrated circuit, and method for controlling laser output of optical pickup apparatus |
摘要 |
An optical-pickup apparatus includes: a first laser light source including a first laser diode to emit a laser beam having a first wavelength, and a back-monitor photodetector to receive the laser beam emitted in a backward direction, not being an optical-disc direction, and output a first monitor signal; a second laser-light source including a second laser diode to emit a laser beam having a second wavelength; a light-receiving circuit including a front-monitor photodetector to receive the laser beam emitted in a forward direction, being the optical-disc direction, and output a second monitor signal, and a switch circuit to be inputted with the first and second monitor signals, and output the first or second monitor signal according to a switch signal; and first and second drive circuits to drive the first and second laser diodes according to the first and second monitor signals outputted from the light-receiving circuit, respectively. |
申请公布号 |
US8427917(B2) |
申请公布日期 |
2013.04.23 |
申请号 |
US201213422242 |
申请日期 |
2012.03.16 |
申请人 |
UCHIYAMA HISAYOSHI;ARAI MASASHI;KOJIMA HIROSHI;KURIHARA RUI;SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC |
发明人 |
UCHIYAMA HISAYOSHI;ARAI MASASHI;KOJIMA HIROSHI;KURIHARA RUI |
分类号 |
G11B27/36;G11B7/00;H01S3/00 |
主分类号 |
G11B27/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|