Temperature compensating method and apparatus for an optical disc device
US7453557B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2006 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Aug 17, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1263
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A temperature compensating method and apparatus uses a front sensor to measure a first power of a light-emitting unit emitting a light, and a thermal sensor to measure the temperature of the light-emitting unit. The temperature is inputted into an I/O unit to figure out a second power from the equations of the temperature and power. Then, the first and second powers are inputted into a controller to adjust the power of the light-emitting unit, or the second powers are inputted into a write strategy to change an output clock to adjust the energy of the light without changing the power of the light-emitting unit. The optical disc device has the effect of the temperature compensation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.