Optical disc device and disc identification method
US8259548B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2010 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Dec 4, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To identify the type of a loaded disc, there is provided an optical disc device, comprising: a light source driven by a drive signal with a high frequency signal superimposed; a detector for detecting return light emitted from the light source; and a controller for controlling the amplitude of the high frequency signal to be superimposed on the drive signal, the optical disc device being configured to read data from an optical disc loaded therein by a signal outputted from the detector, wherein: the controller causes the light source to irradiate the loaded optical disc with light in a condition in which a high frequency signal different from a high frequency signal for data reading is superimposed on the drive signal; and the controller identifies a type of the loaded optical disc based on the return light from the loaded optical disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.