Optical disc recording device
AssigneeFunai Electric Co., Ltd.
InventorTakayuki Ono
Life of this patent
Estimating the term…
Abstract
An optical disc recording device, wherein, during an OPC process addressing a write-once optical disc provided with only one or two recording layers, a recording power value of an optical pickup is changed within a range from (100−A) % of a reference recording power value to (100+B) % of the reference recording power value, and wherein, during an OPC process addressing a write-once optical disc provided with three or more recording layers of the same type as the aforementioned write-once optical disc, the recording power value of the optical pickup is changed within a range from (100−C) % of a reference recording power value to (100+D) % of the reference recording power value, D being set to be less than B.
Claims8
An optical disc recording device, provided with:
- an optical pickup for irradiating an optical disc with light and for using a photodetector to detect return light from the optical disc;
- and
- a determination unit for changing a recording power value of the optical pickup and writing test data onto a test region of the optical disc to determine an optimum recording power for the optical pickup,
- wherein:
- in a case where the optical disc having been mounted in the optical disc recording device is a write-once optical disc provided with only one or two recording layers for playing back or recording information by being irradiated with a laser beam of a specific wavelength band,
- the determination unit changes the recording power value of the optical pickup within a range from (100−A) % of a reference recording power value corresponding to a recording layer for writing the test data of the optical disc mounted in the optical disc recording device, to (100+B) % of the reference recording power value corresponding to the recording layer for writing the test data of the optical disc mounted in the optical disc recording device, and
- in a case where the optical disc mounted in the optical disc recording device is a write-once optical disc provided with three or more recording layers for playing back or recording information by being irradiated with a laser beam of a specific wavelength band,
- the determination unit changes the recording power value of the optical pickup within a range from (100−C) % of the reference recording power value corresponding to the recording layer for writing the test data of the optical disc mounted in the optical disc recording device, to (100+D) % of the reference recording power value corresponding to the recording layer for writing the test data of the optical disc mounted in the optical disc recording device,
- A, B, C, and D all being set to values greater than 0 and less than 100, and D being set to be lower than B.
Dependencies are inferred from the claim text.