Remote control device for vehicle locks
First Claim
1. A remote control device for operating locks of a vehicle comprising, a receiver provided on the vehicle and a transmitter remote from the vehicle, said receiver being adapted to receive a remote control signal transmitted from said transmitter at a location remote from the vehicle and in response thereto control locking and unlocking of the vehicle locks, characterized in that:
- said transmitter comprising, means for coding keyword information, means for converting said coded information into pulses, means for pulse-modulating said pulses, and means for transmitting the pulse-modulated pulses as a remote control signal;
said receiver comprising, means for receiving said remote control signal, means for demodulating the received signal, means for decoding the demodulated signal into an encoded information signal, means for comparing said encoded information signal with a preset code and means for generating an execution signal for operating said locks upon occurrence of a predetermined relationship between the encoded information signal and said preset code;
said means for coding keyword information including a plurality of coding elements for producing at least two output signals with each of said at least two output signals being one of a high level voltage, a low level voltage and a high impedance relating to the information to be coded, and a voltage signal generator for generating a varying voltage signal and for supplying said varying voltage signal through resistors common to respective outputs of said coding elements.
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Accused Products
Abstract
A remote control device for operating vehicle locks having a transmitter for transmitting a remote control signal. The transmitter converts keyword information into pulses of corresponding pulse widths and then pulse modulates these converted pulses prior to transmission as a remote control signal. A receiver is provided for demodulating and decoding the signal and comparing it to a preset code. If the signal corresponds to the preset code an execution signal is generated to produce the locking and locking function.
41 Citations
3 Claims
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1. A remote control device for operating locks of a vehicle comprising, a receiver provided on the vehicle and a transmitter remote from the vehicle, said receiver being adapted to receive a remote control signal transmitted from said transmitter at a location remote from the vehicle and in response thereto control locking and unlocking of the vehicle locks, characterized in that:
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said transmitter comprising, means for coding keyword information, means for converting said coded information into pulses, means for pulse-modulating said pulses, and means for transmitting the pulse-modulated pulses as a remote control signal; said receiver comprising, means for receiving said remote control signal, means for demodulating the received signal, means for decoding the demodulated signal into an encoded information signal, means for comparing said encoded information signal with a preset code and means for generating an execution signal for operating said locks upon occurrence of a predetermined relationship between the encoded information signal and said preset code; said means for coding keyword information including a plurality of coding elements for producing at least two output signals with each of said at least two output signals being one of a high level voltage, a low level voltage and a high impedance relating to the information to be coded, and a voltage signal generator for generating a varying voltage signal and for supplying said varying voltage signal through resistors common to respective outputs of said coding elements. - View Dependent Claims (2, 3)
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Specification