Method for transmitting acoustic signals from a memory or chip card, and card for implementing said method
AssigneeElva SA
InventorCédric Colnot
Life of this patent
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Abstract
A memory card or smart card for emitting sound signals. The card incorporates at least one controlling electronic micromodule which includes in particular processor circuits and a memory in which binary data is stored. An excitation device is connected to the micromodule to convert the binary data into sound signals. A vibrating membrane is connected to the excitation device to emit the sound signals. The vibrating mechanism is constituted by the card itself. Such a design is applicable in particular to transmitting binary data over a telephone line by acoustic coupling with a telephone.
Claims20
A method of emitting acoustic waves from a memory card or a smart card, said card comprising a plurality of precut plastic sheets stacked and affixed so as to hold at least an electro-acoustic transducer having an excitation device, the method comprising the steps of:
- producing mechanical vibration using the excitation device;
- and
- transmitting the mechanical vibration directly to the card, thereby causing the card to vibrate and emit the acoustic waves.
A method of emitting acoustic waves from a memory card or a smart card, said card comprising a plurality of precut plastic sheets stacked and affixed so as to hold at least an electro-acoustic transducer having means for vibrating, the method comprising the steps of:
- producing the mechanical vibration using the means for vibrating;
- transmitting the mechanical vibration directly to the card, thereby causing the card to vibrate and emit the acoustic waves, and
- wherein the means for vibrating does not include an acoustic chamber.
A memory card or a smart card for emitting acoustic waves, comprising:
- an electro-acoustic transducer having an excitation device for producing mechanical vibration;
- and
- a plurality of precut plastic sheets stacked and affixed so as to enclose at least the electro-acoustic transducer, the plurality of precut plastic sheets including a top sheet and a bottom sheet, and including an intermediate sheet having an opening with dimensions matching those of the excitation device,
- wherein the excitation device is secured to the card by arranging the excitation device within the opening of the intermediate sheet and by sandwiching the excitation device between the top and bottom sheets, and
- wherein the mechanical vibration from the excitation device is directly transmitted to the sheets, thereby causing the card to vibrate and emit the acoustic waves.
Dependencies are inferred from the claim text.