FR2607611A1 - REMOTE CONTROL CODED TO CHANGE - Google Patents

Abstract

The invention relates to a coded remote control with a change of code, of the type comprising a transmitter comprising means for transmitting and transmitting a coded message, and a receiver comprising means for receiving the message sent by the issuer, means OF COMPARISON OF THE SAID MESSAGE TO A MESSAGE CONTAINED IN MEMORY, AND OF THE MEANS OF SENDING A COMMAND SIGNAL IN THE EVENT OF COINCIDENCE BETWEEN THE MESSAGE RECEIVED AND THE MESSAGE STORED IN MEMORY. THE REMOTE CONTROL ACCORDING TO THE INVENTION IS CHARACTERIZED BY THE FACT THAT THE RECEIVER CONTAINS IN MEMORY A PREDETERMINED FIXED CODE WHOSE RECEPTION DOES NOT PRODUCE THE SENDING OF THE SAID COMMAND SIGNAL BUT ACTIVATES MEANS OF ENTERING IN THE SAID MEMORY OF A COMMAND CODE RECEIVED AFTER THE FIXED CODE, THE PREDETERMINED FIXED CODE BEING SENT BY A PROGRAMMABLE TRANSMITTER. APPLICATION TO THE AUTOMOTIVE INDUSTRY.

Description

Remote coded change.

  The present invention relates to a coded remote control

  code change, of the type comprising an issuer

  both means for transmitting and transmitting a coded message, and a receiver comprising means for receiving the message sent by the transmitter, means for comparing said message with a message contained in the memory, and transmission means a control signal in case of coincidence

  between the received message and the message stored in memory.

  Such remote controls are used in particular in

  the automotive industry to control the lock-

  unlocking the doors, an alarm, locking devices

  vehicle age, etc. Usually, the transmitter and the receiver are paired

  to the same fixed code, which has many disadvantages

  for the chain-link during which the transmitter and the receiver are separated. In addition, the edition d%; Transmitting host, in case of loss, destruction or need of a new transmitter, requires an expensive installation

and a delicate operation.

  To overcome this disadvantage, it was proposed to provide TV

  control of programming means, for example an inter-

  switch, which can be operated by the user and allows

  both programming a new coded message to memorize

in the memory.

  Such an arrangement has the major drawback of

  put the change of the code contained in memory by an unauthorized third party having a new transmitter and having access

  programming means. Even though the means of

  may only be effective with the issue of the

  already contained in memory, as envisaged by a variant of the proposed device, a risk of code change by

a third remains.

  The present invention aims to overcome these disadvantages of

known devices.

  For this purpose, the remote control according to the invention is characterized

  the fact that the receiver contains in memory a predetermined fixed code whose reception does not produce the transmission of said control signal but operates means for input into said memory of a control code received after said fixed code, said predetermined fixed code

  being transmitted by a programmable transmitter.

  Preferably, the programmable transmitter is with coding wheels or keyboard. In one embodiment of the invention, the memory of the receiver is constituted by a stack of registers whose first register contains said fixed code

  predetermined, reception of said fixed code producing the

  on an offset and coding routine of the

second register.

  The system according to the invention allows the coding of a receiver after delivery of the vehicle, by means of a transmitter at

  any code, by means of the broadcast, by means of the

  programmable transmitter, of the predetermined fixed code specific to the vehicle

  cule. This programmable transmitter, which is in possession only authorized mechanics, thus makes it possible to introduce remotely, by the remote control itself, a code in the memory which did not contain it, or which contained a code

different from that of the issuer.

  The operation is identical when the memory already contains a code and the user wishes to change this code. It is

  the case for example of loss or destruction of the issuer.

  The user can then acquire a new transmitter, at a

  any code that can be introduced in place of the year

  cien code in the receiver's memory, provided that

  programmable memory and predetermined fixed code.

  born of the vehicle. This fixed code therefore constitutes an access code

in memory.

  In the case of a stack of registers that can contain several control codes, for example specific to various users, the operation is identical. The introduction of a new code removes from memory the code contained in the last register.

  The programmable transmitter is a simple and inexpensive device

  the use of which by dealers is easy

and economic.

Claims (3)

  1.- Code-coded remote control, of the type comprising   a transmitter comprising means for transmitting and transmitting a coded message, and a receiver comprising means for receiving the message sent by the transmitter, means for comparing said message & a message contained in the memory, and means transmission of a control signal in the event of coincidence between the message received and the message stored in memory, characterized in that the receiver   contains in memory a predetermined fixed code whose reception   tion does not produce the emission of said control signal but actuates means for introducing into said memory a command code received after said fixed code, said fixed code   predetermined being transmitted by a programmable transmitter.   2. Remote control according to claim 1, characterized in that the programmable transmitter is with coding wheels or keyboard.   3. Remote control according to one of claims 1 and 2,   characterized in that the memory of the receiver is constituted by a stack of registers whose first register contains said predetermined fixed code, the reception of said fixed code producing the opening on a subroutine   offset and coding of the second register.