Mobile radio telephone apparatus

• US 5,444,306 A
• Filed: 03/01/1993
• Issued: 08/22/1995
• Est. Priority Date: 03/02/1992
• Status: Expired due to Term

• Current Assignee: Fujitsu Mobile Communications Limited (Fujitsu Limited)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Hoshino, Makoto, Sawa, Buntaro
• Primary Examiner(s): Stephan, Steven L.
• Assistant Examiner(s): Krishnan, Aditya
• Application Number:
  US08/024,297
• Time in Patent Office: 904 Days
• Field of Search: 455/343, 455/99, 455/127, 379/58, 307/9.1, 307/10.1, 307/66, 307/38, 364/426
• US Class Current: 307/9.1
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: H04B 1/3822 specially adapted for use in vehicles H04B1/3827 takes precedence
• CPC Class Codes: H04M 1/6041 Portable telephones adapted for handsfree use
• CPC Class Codes: H04W 52/0274 by switching on or off the equipment or parts thereof
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The radio telephone apparatus which is mounted on a car is disclosed. An operational state of the apparatus is memorized therein as a power flag. On the basis of the power flag, the apparatus may be recovered to an operational state at a time when an ignition switch of the car is turned off. More specifically, the power flag may be referred every time a position of the ignition switch is changed from OFF position to ON position. At the event, if the flag indicates that the apparatus was in an operative state at a time when the ignition switch of the car is turned off, the power supply to the apparatus is resumed in response to the position change of the ignition switch. Contrarily, if the flag indicates that the apparatus was not in an operative state, the power supply to the apparatus is not initiated even if the position of the ignition switch is changed.

Claims

1. A radio telephone apparatus mounted on a car supplied power from a car battery, the car including an ignition switch having an "ON" position and an "OFF" position, the radio telephone apparatus comprising:

a power switch;

first detecting means for detecting an actuation of the power switch;

storing means coupled to the first detecting means for storing an operational state of the apparatus in response to a detection of the power switch actuation by the first detecting means;

second detecting means for detecting a functional position of the ignition switch;

power supply means for supplying the apparatus with electric power from the car battery; and

control means coupled to the storing means and the second detecting means for directing the electric power from the power supply means to selected sections of the apparatus if the operational state in the storing means indicates that the apparatus is in an operative state when the second detecting means detects that the ignition switch is switched from an "OFF" position to an "ON" position, and for not directing the electric power to the selected sections of the apparatus if the operational state in the storing means indicates that the apparatus is in a non-operative state when the second detecting means detects that the ignition switch is switched from the "OFF" position to the "ON" position.

2. A method for operating a radio telephone apparatus mounted on a car supplied power from a car battery, the car including an ignition switch having an "ON" position and "OFF" position, the method comprising the steps of:

detecting an actuation of a power switch of the apparatus;

storing an operational state of the apparatus in response to a detection of the actuation of the power switch;

detecting if the ignition switch is in the "ON" position or in the "OFF" position; and

supplying selected sections of the apparatus with electric power from the car battery if the stored operational state indicates that the apparatus is in an operative state when the ignition switch is detected to be switched from the "OFF" position to the "ON" position.

3. A radio telephone apparatus mounted on a car supplied power from a car battery, the car including an ignition switch having an "ON" position and an "OFF" position, the radio telephone apparatus comprising:

(a) switch means for generating a signal in response to a user'"'"'s actuation of the switch means;

(b) storing means connected to the switch means for storing the signal;

(c) power supply means connected to the car battery for supplying power to selected sections of the radio telephone apparatus in response to the signal; and

(d) control means for controlling the power supply means so that the power supply to the radio telephone apparatus is controlled on the basis of the signal stored in the storing means when the ignition switch is actuated.

4. A radio telephone apparatus as claimed in claim 3, further comprising detecting means for detecting the position of the ignition switch and wherein the control means is coupled to the detecting means and receives the detected position of the ignition switch.

5. A method for operating a radio telephone apparatus mounted on a car supplied power from the car battery, the car including an ignition switch having an "ON" position and "OFF" position, the method comprising the steps of:

(a) generating a signal in response to an actuation of a power switch of the apparatus;

(b) storing the signal as a flag indicative of an operational state of the apparatus; and

(c) supplying selected sections of the apparatus with electric power from the car battery if the stored flag indicates that the apparatus is in an operative state when a position of the ignition switch is changed from the "OFF" position to the "ON" position.