| 摘要 |
The present invention relates to an optical drive capable of writing data to an optical carrier or disk, the optical drive having a laser driver device with an adjustable power level (VSL). The optical drive has a radiation source (4) capable of emitting a radiation beam (5) for writing data with a certain writing speed to an optical carrier and a laser driver device (LDD) comprising electronic circuitry means for providing a control current to the radiation source in response to a data signal (NRZ). The electronic circuitry means is supplied by an adjustable power supply (REG_SUP, 32) having a power level (VSL) that is adapted for being adjusted in response to the data writing speed to the optical carrier. The optical drive therefore has a reduced power dissipation compared with the hitherto known solutions. This results in an increased lifetime of the radiation source, e.g. the laser, and a reduced power usage. |
