By Sensing Distinguishing Features Of [n: Or On] Records, E.g. Diameter [n: End Mark] {g11b 19/12} Patents (Class G9B/19.017)

Cross-Reference Art Collections

[n: involving the detection of an identification or authentication mark (record carriers indicating unauthorised or prior use g9b/23.087)] [n0209] [c0210] {g11b 19/12c} (Class G9B/19.018)
[n: involving the detection of diameter of disks (feeding or guiding of a single record carrier g9b/17.013 and subgroups)] [n0209] [c0210] {g11b 19/12d} (Class G9B/19.019)
[n: involving the detection of carrier data format] [n0209] {g11b 19/12f} (Class G9B/19.02)
[n: involving detection of the number of sides, e.g. single or double, or layers, e.g. for multiple recording or reproducing layers] [n0209] [c0210] {g11b 19/12l} (Class G9B/19.021)
[n: involving the detection of track pitch or recording density] [n0209] {g11b 19/12p} (Class G9B/19.022)
  • INFORMATION STORAGE MEDIUM, RECORD REPRODUCING DEVICE, AND RECORD REPRODUCING METHOD
    Publication number: 20110310715
    Abstract: Provided is an information recording medium including a plurality of recording layers. Each recording layer may comprise at least one optical power control (OPC) area, and each OPC area is allocated so as not to overlap an adjacent layer in a given radius.
    Type: Application
    Filed: August 12, 2011
    Publication date: December 22, 2011
    Inventors: Sung-Hee Hwang, In-Oh Hwang, Jung-Wan Ko, Kyung-Geun Lee