Small form factor optical data storage disc and disc drive for use in mobile electronic device
AssigneeVmedia Research, Inc.
InventorsJerry E. Hurst, JR., Neil Deeman, Steven B. Volk
Life of this patent
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Abstract
An optical data storage disc measuring 32 mm in diameter contains 1 GB of data per layer. The data is designed to be readable by a disc drive that contains a blue wavelength laser, an objective lens having a numerical aperture of 0.72 and conventional DVD controller electronics. This combination of elements allows a full-length movie or a video game to be displayed with DVD-quality on a cell phone or other portable hand held device.
Claims22
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A combination comprising an optical data storage disc and a disc drive, the optical data storage disc measuring approximately 32 mm in diameter, the disc drive comprising an optical pickup head utilizing a blue laser beam for reading data recorded on the disc, the disc drive comprising an analog front end processor and a DVD controller for processing a signal output from the analog front end processor, wherein the disc comprises a Data Zone consisting of user data of entertainment or educational content, and wherein a channel bit length of data in the Data Zone is 67 nm±1% and wherein an average track pitch of data in the Data Zone is 378 nm±0.005 μm.
A combination comprising an optical data storage disc and a disc drive, the optical data storage disc measuring approximately 32 mm in diameter, the disc drive comprising an optical pickup head utilizing a blue laser beam for reading data recorded on the disc, the disc drive comprising an analog front end processor and a DVD controller for processing a signal output from the analog front end processor, wherein the disc comprises a Control Data Zone, the Control Data Zone including 256 identical error correction code (ECC) blocks.
An optical data storage disc, the optical data storage disc measuring approximately 32 mm in diameter, the disc comprising a Data Zone consisting of user data of entertainment or educational content, wherein a channel bit length of data in the Data Zone is 67 nm±1% and wherein an average track pitch of data in the Data Zone is 378 nm±0.005 μm.
A cartridge containing an optical data storage disc, the cartridge comprising a plastic shell having lateral walls and a floor, the cartridge further comprising a sheet metal cover plate attached to the plastic shell, a nondata side of the disc being positioned adjacent the floor of the plastic shell, a data side of the disc being positioned adjacent the sheet metal cover plate, the optical data storage disc measuring approximately 32 mm in diameter, the disc comprising a Data Zone consisting of user data of entertainment or educational content, wherein a channel bit length of data in the Data Zone is 67 nm±1% and wherein an average track pitch of data in the Data Zone is 378 nm±0.005 μm.
A combination comprising an optical data storage disc and disc drive, the optical data storage disc being mounted in the disc drive such that the disc drive is able to read data recorded on the optical data storage disc, the disc drive comprising:
- an optical pickup head comprising a laser diode adapted to generate a laser beam having a wavelength of approximately 405 nm and an objective lens having a numerical aperture of approximately 0.72;
- an analog front end processor and a DVD controller for processing a signal output from the analog front end processor;
- a spindle;
- and
- an attractive component adjacent the spindle;
- the disc comprising:
- a Data Zone consisting of user data of entertainment or educational content, wherein a channel bit length of data in the Data Zone is 67 nm±1% and wherein an average track pitch of data in the Data Zone is 378 nm±0.005 μm
- wherein a retainer ring is attached to a surface of the disc, at least one of the retainer ring and the attractive component comprising a magnetic material and the other of the retainer ring and the attractive component comprising a magnetizable material such that a magnetic force between the retainer ring and the attractive component holds the disc on the spindle;
- wherein the disc is housed in a cartridge, the cartridge comprising a plastic shell having lateral walls and a floor, the cartridge further comprising a sheet metal cover plate attached to the plastic shell, a nondata side of the disc being positioned adjacent the floor of the plastic shell, a data side of the disc being positioned adjacent the sheet metal cover plate;
- and
- wherein a stacking ring protrudes from the data side of the disc, the stacking ring located inside an Information Zone of the disc, the stacking ring being sized and positioned so as to prevent data recorded in the Information Zone from coming into contact with the cartridge.
A method of providing entertainment or educational content to a mobile host device comprising:
- providing an optical data storage disc containing data representing the entertainment or educational content, the disc measuring approximately 32 mm in diameter;
- reading the data with a blue laser beam to generate an electrical signal;
- passing the electrical signal through a DVD controller;
- and
- delivering an output of the DVD controller to the mobile host device.
An optical data storage disc comprising a burst cutting area, the burst cutting area being formed in an area of the disc comprising a reflective layer, the burst cutting area comprising pits that overlap each other in a radial direction to form a plurality of radial sub-stripes, the pits in each sub-stripe having a circumferential length and being spaced circumferentially from pits in an adjacent sub-stripes such that the plurality of sub-stripes together form a diffraction grating which appears as a dark stripe to an optical pick-up head reading the disc.
Dependencies are inferred from the claim text.