ELECTRONIC DEVICE AND METHOD FOR CONTROLLING ELECTRONIC DEVICE

• US 20100293361A1
• Filed: 04/12/2010
• Published: 11/18/2010
• Est. Priority Date: 05/18/2009
• Status: Abandoned Application

• Current Assignee: Fujitsu Mobile Communications Limited (Fujitsu Limited)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: SHIBATA, Shigeru
• Application Number:
  US12/758,159
• Publication Number:
  US 20100293361A1
• Time in Patent Office: Days
• US Class Current: 713/1
• CPC Class Codes: G06F 1/24 Resetting means
• CPC Class Codes: H04M 1/236 including keys on side or rear faces
• CPC Class Codes: H04M 1/724 User interfaces specially adapted for cordless or mobile telephones
• CPC Class Codes: H04M 1/73 Battery saving arrangements

Abstract

An electronic device including a power key, a time counter which measures how long the power key is continuously pressed, and first and second controllers is provided. The first controller can be suspended while performing a software process upon identifying a length of time measured by the time counter as not being longer than a first given time length, and can be in control so that a power supply is turned off upon identifying the measured length of time as being longer than a second given time length which is longer than the first given time length and as not being longer than a third given time length which is longer than the second given time length. The second controller can send a resetting signal to the first controller upon identifying the measured length of time as being longer than the third given time length.

Claims

1. An electronic device, comprising:

a power key;

a time counter adapted for measuring how long the power key is continuously pressed;

a first controller adapted for being suspended while performing a software process upon identifying a length of time measured by the time counter as not being longer than a first given time length, the first controller being in control so that a power supply is turned off upon identifying the measured length of time as being longer than a second given time length which is longer than the first given time length and as not being longer than a third given time length which is longer than the second given time length; and

a second controller adapted for sending a resetting signal to the first controller upon identifying the measured length of time as being longer than the third given time length.

2. The electronic device according to claim 1, wherein the second controller is implemented only by hardware.

3. The electronic device according to claim 1, wherein the second controller is constituted by a differential circuit and a resetting signal forming circuit.

4. The electronic device according to claim 1, wherein the second controller can send the resetting signal to the first controller upon the first controller being suspended so that the first controller returns to an initial state.

5. The electronic device according to claim 4, wherein the initial state equals a state that the first controller is in just after the electronic device is powered on.

6. A method for controlling an electronic device which includes a power key and a controller, comprising:

measuring how long the power key is continuously pressed;

making the controller suspended while a software process is being performed upon a measured length of time for which the power key is continuously pressed being identified as not being longer than a first given time length;

making the controller in control so that a power supply is turned off upon the measured length of time being identified as being longer than a second given time length which is longer than the first given time length and as not being longer than a third given time length which is longer than the second given time length; and

sending a resetting signal to the controller upon the measured length of time being identified as being longer than the third given time length.

7. The method for controlling the electronic device according to claim 6, wherein the resetting signal is sent only by means of hardware.

8. The method for controlling the electronic device according to claim 6, wherein the resetting signal is sent by means of a differential circuit and a resetting signal forming circuit.

9. The method for controlling the electronic device according to claim 6, wherein the resetting signal is sent to the controller upon the controller being suspended so that the controller returns to an initial state.

10. The method for controlling the electronic device according to claim 9, wherein the initial state equals a state that the controller is in just after the electronic device is powered on.