Combined garage door and keyless entry fob

• US 20050258934A1
• Filed: 05/21/2004
• Published: 11/24/2005
• Est. Priority Date: 05/21/2004
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (Motors Liquidation Co. GUC Trust)
• Inventors: Tu, Thomas H., Buck, M. Scott
• Granted Patent: US 7,215,238 B2
• Time in Patent Office: Days
• US Class Current: 340/5.230
• CPC Class Codes: E05Y 2400/664 by radio waves
• CPC Class Codes: G07C 2009/00507 keyless data carrier having more than one function
• CPC Class Codes: G07C 2009/00928 for garage doors
• CPC Class Codes: G07C 2209/08 With time considerations, e.g. temporary activation, valid time window or time limitations
• CPC Class Codes: G07C 2209/62 Comprising means for indicating the status of the lock
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

Methods and apparatus are provided for a combined vehicle keyless entry and garage door (GD) opener fob. The fob comprises a receiver, transmitter, processor, memory, user activated function switches, and preferably a display. In a GD function learn mode, the fob memorizes the signal parameters of a GD activate signal received directly from a nearby GD opener. In the normal GD operate mode, the fob transmits a replica of the GD activate signal using the learned signal parameters stored in the memory. The optional display preferably tells the user that the learn mode is active, prompts the user to operate the nearby GD opener during the learn mode, indicates whether the learn operation was successful or not and shows when the fob has returned to normal (non-learn mode) operation. The GD modes of the fob are entirely self-contained and do not depend upon the vehicle electronics system.

Claims

1. A combined fob having vehicle keyless entry functions and garage door (GD) opener functions, comprising:

a receiver adapted to receive a GD activate signal directly from a GD opener;

a processor coupled to the receiver and configured to control the operation of the fob;

a user operated switch coupled to the processor, wherein the switch is adapted to permit the user to input at least ‘

enter GD learn mode’ and

‘

GD activate’

commands for the GD opener function and other commands for the keyless entry functions;

a transmitter coupled to the processor and configured to send vehicle keyless entry signals to a vehicle and GD activate signals to a GD actuation mechanism in response to user operation of the one or more user operated switches;

a memory coupled to the processor, wherein the memory is configured to store signal parameters of the GD activate signal received by the receiver, wherein the parameters are sufficient to allow the transmitter to replicate the GD activate signal under the direction of the processor;

wherein in response to an ‘

enter GD learn mode’

command input via the one or more user operated switches, the processor is configured to start a timer setting a period during which the receiver can receive a GD activate signal from the GD opener, wherein the received GD activate signal is analyzed to extract its signal parameters which are then stored in the memory thereby completing the learn mode; and

wherein the GD activate signal parameters are thereafter retrieved by the processor in response to an ‘

GD activate’

command entered by the user into the one or more user operated switches and used to control the transmitter to transmit a replica of the GD activate signal.

2. The fob of claim 1 further comprising a display coupled to the processor, wherein the display acting under the control of the processor is adapted to alert the user when the fob is in the learn mode.

3. The fob of claim 1 wherein the user operated switch is configured to cause the fob to enter the learn mode when activated for at least a predetermined time and to cause the fob to transmit a previously learned GD activate signal when activated for a time period smaller than the predetermined time.

4. The fob of claim 1 wherein the user operated switch is a dual mode switch adapted to cause the fob to enter the learn mode when the dual mode switch is pressed and held for a predetermined time and to cause the fob to transmit a previously learned GD activate signal when the dual mode switch is pressed and substantially immediately released.

5. The fob of claim 1 wherein the user operated switch is adapted to cause the fob to enter the learn mode and a second switch adapted to cause the fob to transmit a previously learned GD activate signal.

6. The fob of claim 1 further comprising a second user operated switch, wherein the user operated switch and second operated switch are configured to cause the fob to enter the learn mode when the switches are activated in combination.

7. A method for operating a wireless fob having keyless vehicle entry functions and garage door (GD) activation functions, comprising:

determining whether the fob has entered a GD learn mode, and if NO (FALSE), continuing or resuming normal operation, and if YES (TRUE), then;

maintaining the fob in the GD learn mode up to a predetermined learn mode time interval T2 while waiting for receipt of a GD activate signal directly from a GD opener;

determining whether the fob has received the GD activate signal during learn mode time interval T2, and if NO (FALSE), exiting the learn mode, and if YES (TRUE), then;

analyzing the received GD activate signal to determine parameters characterizing the GD activate signal to permit later replication of the signal by the fob;

then

storing the parameters characterizing the GD activate signal in memory; and

exiting the GD learn mode and resuming normal operation of the fob.

8. The method of claim 7 further comprising after the first determining step, energizing a display adapted to indicate to a user that the fob has entered the learn mode.

9. The method of claim 8 further comprising after the storing or exiting steps, energizing the display to indicate to a user that the fob is no longer in the learn mode.

10. The method of claim 7 wherein the analyzing step is performed at least in part in conjunction with the second determining step to test a received signal for consistency with known GD activate signal formats.

11. The method of claim 8 wherein after either the second determining step of outcome YES (TRUE) or the storing step, modifying the display to indicate that learn mode was successful.

12. The method of claim 7 wherein after the first determining step, prompting the user to activate a nearby GD opener so that the fob can obtain GD activate signal parameters directly from the GD opener.

13. A combined vehicle keyless entry and garage door (GD) opener fob, comprising:

a receiver configured to receive GD activate signals directly from a GD opener during a GD function learn mode of the fob;

a processor coupled to the receiver configured to analyze the GD activate signals received by the receiver directly from the GD opener, to obtain the GD activate signal parameters;

a memory coupled to the processor configured to store the GD activate signal parameters determined by the processor;

a transmitter coupled to the processor configured to transmit in response to a user command a replica of the received GD activate signal based on the parameters stored in the memory; and

a user activated function switch configured to place the fob in the GD function learn mode and thereafter to cause the fob to transmit the replica of the GD activate signal.

14. The fob of claim 13 further comprising a display coupled to the processor for indicating when the fob is in the learn mode, for prompting the user to operate the nearby GD opener for learning purposes and for indicating whether learning was successful or not.

15. The fob of claim 14 wherein the display further indicates when the fob has returned to normal, non-learn mode operation.

16. A method of operating a self-contained combined vehicle keyless entry and garage door (GD) opener fob, comprising:

in a learning mode, receiving a GD activate signal directly from a nearby GD opener;

analyzing the received GD activate signal in the fob to determine its parameters so as to permit subsequent replication thereof by the fob;

storing the GD activate signal parameters in memory in the fob thereby completing the learning mode; and

thereafter using the stored parameters on user command to cause the fob to transmit a replica of the GD activate signal

17. The method of claim 16 further comprising prior to the receiving step, prompting the user to activate the nearby GD opener.

18. The method of claim 16 further comprising after the storing step, indicating to the user that the learning mode is complete.