| Patent application number | Description | Published |
|---|
| 20080267021 | Recording method, optical disk, reproduction method, and recording/reproduction device - A wide test region is ensured in an optical disk and the number of repeated recording instances is suppressed so that the optical disk is made insusceptible to damage and the test region can effectively be utilized. In an optical disk which includes a plurality of recording layers each having a power adjustment region for performing adjustment of power of a beam emitted while the data is recorded and in which the data can be rewritten in each recording layer, when, in performing the adjustment of power while the data is recorded, a region between a first power adjustment region that is a power adjustment region in a first recording layer and a second power adjustment region that is a power adjustment region in a second recording layer provided at a position that is more apart than that of the first recording layer from a plane from which the light beam enters becomes smaller, along a radial direction of the optical disk, than a predetermined size, a utilized region, in one of the first power adjustment region and the second power adjustment region, which is larger than that in the other is erased. | 10-30-2008 |
| 20080291798 | OPTICAL DISC RECORDING METHOD AND OPTICAL DISC - A recording method for an optical disc having at least three recording layers ( | 11-27-2008 |
| 20080298195 | Optical recording method and optical recording device - To adjust the parameters of a write strategy for recording data on an optical recording medium, the jitter value of a reproduced signal obtained from recorded data is detected. If the jitter value exceeds a prescribed threshold, a write strategy parameter having a comparatively small effect on the jitter value is adjusted, and subsequent data are written on the recording medium using the adjusted parameter. Parameters are selected for adjustment in ascending order of their effect on the jitter value. Stable data recording can thereby be carried out without significant jitter degradation. | 12-04-2008 |
| 20090303850 | OPTICAL DISC MEDIUM AND OPTICAL DISC DEVICE - When using an optical disc medium that includes pit trains having their widths narrower than a diffraction limit, it is difficult to detect a tracking error signal and take a tracking-servo control while increasing pit density in a direction orthogonal to a pit-train extension direction. | 12-10-2009 |
| 20100014401 | OPTICAL DISC RECORDING METHOD AND OPTICAL DISC - A recording method for an optical disc having at least three recording layers ( | 01-21-2010 |
| 20100110866 | OPTICAL DISC REPRODUCING LIGHT QUANTITY SETTING METHOD AND OPTICAL DISC APPARATUS - In a method of setting a quantity of light directed onto an optical disc for reproduction purposes, an area of the optical disc in which information has been recorded is reproduced with a test-reproducing light quantity (S | 05-06-2010 |
| 20100162282 | Optical-system driving device - An optical-system driving device is achieved that can switch over between objective lenses and is space-saving, lightweight, and simply-configured. | 06-24-2010 |
| 20100284260 | OBJECTIVE LENS DRIVING DEVICE AND OPTICAL PICKUP DEVICE - An objective lens driving device includes a lens holder ( | 11-11-2010 |
