Portable device using inductive antenna to receive data transmitted via modulating vertical or horizonal line synchronization signals of a swept frame video display monitor
First Claim
1. A data transmission system comprising a data transmitter (1) and a portable information detection device (7) capable of receiving data transmitted by said data transmitter (1),wherein said data transmitter (1) comprisesswept frame display means (2),a composite video signal generator (20, 22) comprising a vertical and/or horizontal line signal generator to control the operation of said swept frame display means (2), andmodulation means (23) of at least one of the elementary signals constituting said composite video signals with said data to be transmitted, said modulation means (23) being adapted to modulate one of said line synchronization signals;
- and wherein said portable information detection device (7) intended to receive said data transmitted by said data transmitter (1) comprisesan inductive antenna (44,
45) to detect said modulated line synchronization signal.
1 Assignment
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Accused Products
Abstract
Data transmission system comprising a data transmitter (1) including:
swept frame display means (2), and
a generator of composite video signals (20, 22) to control the operation of said swept frame display means (2); and
a portable information detection device (7) for receiving said transmitted data by said data transmitter (1).
The data transmitter (1) further comprises means (23) for modulating at least one of the elementary signals constituting said composite video signals with the data to be transmitted, and said information detection device (7) further comprises any inductive antenna (44, 45) for detecting said modulated elementary signal.
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Citations
13 Claims
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1. A data transmission system comprising a data transmitter (1) and a portable information detection device (7) capable of receiving data transmitted by said data transmitter (1),
wherein said data transmitter (1) comprises swept frame display means (2), a composite video signal generator (20, 22) comprising a vertical and/or horizontal line signal generator to control the operation of said swept frame display means (2), and modulation means (23) of at least one of the elementary signals constituting said composite video signals with said data to be transmitted, said modulation means (23) being adapted to modulate one of said line synchronization signals; and wherein said portable information detection device (7) intended to receive said data transmitted by said data transmitter (1) comprises an inductive antenna (44,
45) to detect said modulated line synchronization signal.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
Specification