Apparatus for discriminating optical recording medium and method for discriminating optical recording medium
US7266065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2003 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Nov 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
It is an object of the present invention is to provide an apparatus for discriminating an optical recording medium and a method for discriminating an optical recording medium which can reliably discriminate the kind of an optical recording medium even in the case where the optical recording medium to be discriminated is formed with periodical undulation in the circumferential direction thereof. The apparatus for discriminating an optical recording medium according to the present invention includes a first electrode 11, a second electrode 12, an alternate current signal generation circuit 13 for applying an alternate current A to the first electrode 11, a detection circuit 14 for detecting a level of an alternate current B appearing at the second electrode 12, and a control circuit 15 for controlling the operations of the alternate current signal generation circuit 13 and the detection circuit 14.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.