Extrinsic signal to shunt an acoustic driver in a cellular telephone, pager or the like

• US 7,043,286 B1
• Filed: 06/13/2001
• Issued: 05/09/2006
• Est. Priority Date: 06/13/2000
• Status: Expired due to Fees

• Current Assignee: Leason Holdings Company, LLC
• Original Assignee: Leason Holdings Company, LLC
• Inventors: Leason, David
• Primary Examiner(s): Beamer, Temica
• Assistant Examiner(s): Peaches, Randy
• Application Number:
  US09/880,630
• Time in Patent Office: 1,791 Days
• Field of Search: 455/404.1, 455/561, 455/411, 455/456.4, 455/518, 455/466, 455/514, 455/562.1, 455/565, 455/418, 455/420, 455/426, 455/63, 455/456, 455/76.1, 455/415, 455/410, 455/456.2, 455/456.1, 455/417, 455/422.1, 455/67.12, 455/701, 340/681, 370/95.1
• US Class Current: 455/701
• CPC Class Codes: H04M 1/72454 according to context-related or environment-related conditions
• CPC Class Codes: H04M 19/045 Call privacy arrangements, e.g. timely inhibiting the ring signal

Abstract

A method for selectively shunting an acoustic driver within an electronic device detects the presence of a squelch signal from a local emitter and automatically shunts the acoustic driver in response to the detection, free of any communication back to the emitter. The squelch signal originates from an emitter which is positioned extrinsic to the device, and can be broadcast so as to define a zone of influence within which the acoustic drivers of electronic devices will be squelched. In lieu of an acoustic driver, a vibrator can be activated to quietly alert the user of the incoming message while the squelch signal is present. As a result, the invention enables a proprietor to a greater degree of control over ringing and beeping noises generated by such devices when positioned within a designated space. A broadcast system for defining the zone of influence and electronic devices that include circuitry that implement the method are also disclosed.

Claims

1. An electronic device of the type which alerts a user to an incoming message by connecting an alert signal to a preselected one of a first alert device comprising a vibrator and a second alert devices, comprising:

a) a detector which monitors the incoming message to detect the presence of a squelch signal broadcast locally by an emitter and generates a control signal at its output when the squelch signal is detected;

b) a processor operatively connected to the output of the detector;

c) an alert-mode memory-cell storing one of a default binary value and a user-set binary value;

d) a buffer memory connected to the processor and (i) configured to store a predetermined binary value when the squelch signal is detected in response to the control signal and also (ii) configured to store the contents of the alert-mode memory-cell in the absence of detection of the squelch signal;

e) a switch, operatively connected to the processor, to (i) automatically direct the alert signal to the vibrator when buffer memory stores the predetermined binary value and (ii) automatically direct the alert signal to a predetermined one of the first and second alert devices as a function of the contents of the buffer memory in the absence of the squelch signal.

2. The electronic device of claim 1, further comprising a circuit configured to populate the buffer memory with the contents of the alert-mode memory-cell when the broadcast squelch signal ceases being detected.

3. The electronic device of claim 1, further comprising a software program which executes in the processor so as to populate the buffer memory with the contents of the alert-mode memory-cell when the broadcast squelch signal ceases being detected.

4. The electronic device of claim 1, wherein the buffer memory is configured to store only one bit.

5. In a device that alerts a user to an incoming message by activating one of an acoustic driver and a vibrator, the device including a buffer memory and an alert-mode memory, the alert mode memory containing one of a default binary value and a user-set binary value, a method for automatically placing the device in a quiet mode of operation comprising the steps of:

a) detecting the presence of a broadcast squelch signal by monitoring signals that arrive at the device from an emitter;

b) generating a control signal in response to the detection of the broadcast squelch signal;

c) writing to the butter memory (i) a first binary value which signifies the quiet mode of operation in response to the generated control signal and (ii) the contents of the alert-mode memory in the absence of the control signal;

d) controlling a state of an alert mode switch based on the contents of the buffer memory; and

e) activating (i) the vibrator in response to the incoming message whenever the buffer memory contains the first binary value, and (ii) either the vibrator or the acoustic driver in response to the incoming message whenever the buffer memory contains the contents of the alert-mode memory.

6. The method as in claim 5, the alert mode memory contents are a second binary value different than the first binary value, and wherein the alert mode switch activates the acoustic driver in response to the incoming message whenever the binary value in the buffer memory is the second binary value.

7. The method as in claim 5, wherein the squelch signal originates extrinsic to the device.

8. The method as in claim 5, wherein the detecting step comprises comparing incoming signals that arrive at the device to an expected signal pattern to detect the presence of a squelch signal.

9. The method as in claim 5, wherein the detecting step comprises processing incoming signals that arrive at the device to extract, when present, an indicium of the presence of the squelch signal and thereby detect the presence of a squelch signal.

10. The method as in claim 5, including the additional step of shunting the acoustic driver for a period of time after the broadcast squelch signal is detected.

11. The method as in claim 10, wherein the step of shunting the acoustic driver continues for a period of time after the broadcast squelch signal is no longer present.

12. The method of claim 5, wherein the detecting step monitors a header of the incoming message for inclusion of the broadcast squelch signal.

13. The method of claim 5, wherein the buffer memory is configured to store only one bit.

14. An electronic device of the type which alerts a user to an incoming message by connecting an alert signal to either a vibrator or an acoustic driver, comprising:

a) a detector which monitors the incoming message to detect the presence of a squelch signal broadcast locally by an emitter and generates a control signal at its output when the squelch signal is detected;

b) a processor operatively connected to the output of the detector;

c) an alert-mode memory-cell storing a user-settable binary value;

d) a buffer memory connected to the processor and configured to store (i) a predetermined binary digit in response to the control signal, and (ii) the contents of the alert-mode memory-cell in the absence of the control signal;

e) a switch, operatively connected to the processor, to automatically direct the alert signal to (i) the vibrator when buffer memory stores the predetermined binary digit, and (ii) the vibrator or the acoustic driver, as a function of the contents of the buffer memory, in the absence of the control signal.

15. The electronic device of claim 14, further comprising a circuit configured to populate the buffer memory with the contents of the alert-mode memory-cell when the broadcast squelch signal ceases being detected.

16. The electronic device of claim 14, further comprising a software program which executes in the processor so as to populate the buffer memory with the contents of the alert-mode memory, cell when the broadcast squelch signal ceases being detected.

17. The electronic device of claim 14, wherein the buffer memory is configured to store only one bit.

18. The electronic device of claim 14, wherein the detector includes a comparator configured to compare signals in the incoming messages to an expected signal pattern in order to detect the presence of the squelch signal.

19. The electronic device of claim 14, wherein the detector is configured to detect the presence of the squelch signal by extracting an indicium of the presence of the squelch signal.

20. The electronic device of claim 14, wherein the detector is configured to monitor a header of the incoming message for inclusion of the broadcast squelch signal.