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US 8,081,541 B2Granted
Optical disc
AssigneeMurata Manufacturing Co., Ltd.
InventorsYuya Dokai, Noboru Kato, Ikuhei Kimura
Life of this patent
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Abstract
An optical disc includes an electromagnetic coupling module mounted therein. The electromagnetic coupling module includes a wireless IC chip and a feeder circuit substrate in which a feeder circuit including a resonant circuit having a predetermined resonant frequency is disposed. The electromagnetic coupling module is electromagnetically coupled to a reflective film defining a metal thin film of the optical disc, and the reflective film defines an antenna or radiation pattern of the electromagnetic coupling module.
Claims6
An optical disc comprising:
- an electromagnetic coupling module provided adjacent to a reflective film defining a metal thin film of the optical disc;
- wherein
- the electromagnetic coupling module includes a wireless IC chip and a feeder circuit substrate;
- the feeder circuit substrate includes a feeder circuit including a matching circuit;
- and
- the electromagnetic coupling module is electromagnetically coupled to the reflective film defining the metal thin film of the optical disc, and the reflective film defines an antenna or radiation pattern of the electromagnetic coupling module.
3 more elements
Dependencies are inferred from the claim text.