JPH01269316A - Potable data instrument terminal equipment - Google Patents

Abstract

PURPOSE:To eliminate the wasteful consumption of a power source by watching time during which a device main body is let alone when a user unhands it, and switching off the power source automatically when it reaches prescribed time. CONSTITUTION:When the device main body 13 is held in a hand for operation, the hand touches a metallic plate 15, and the oscillator OSC1 of a detecting side oscillates frequency different from that of the oscillator OSC2 of a reference side. Accordingly, a beat component is generated from a mixer MIX, and the decision signal A of deciding part DEC goes to '1'. When the device main body 13 is unhanded as a power switch 17 being switched on after the termination of the operation, the oscillated frequencies of the oscillators OSC1 and OSC2 coincide with each other, and the beat component of the mixer MIX is eliminated. As the result, the decision signal A becomes '0', and a time counting part 16 counts up, and when it comes to be prescribed count value, a power control part 11 turns off respective power supplies by a main battery 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a portable data device terminal device, and particularly to a device for controlling power off of the portable data device terminal device.

(Prior Art) FIG. 2 is a block diagram showing a circuit example of a conventional portable data device terminal device according to the present invention.

In the figure,] is a key power unit, 2 is a communication circuit unit for communicating with the outside, 3 is a liquid crystal display unit, 4 is a display control unit,
5 is a display power supply unit, 6 is a printer unit, 7 is a main memory that stores each control program, etc., 8 is a backup memory that stores information on each control process, etc., 9 is a sub battery, ] 0 is a main memory of this device A main battery supplies power to each part;]] is a power supply control section that monitors the voltage of the main battery 10 and performs power off control, etc.; ]2 is a main control section that supervises and controls this device. Note that, as for the power supply path of the main battery 10, only the path to the display power supply section 5 is shown and the rest are omitted.

The main control unit 12 programs data input from the key human power unit 1, displays it on the display unit 3, and transfers the data to a host device via the communication circuit unit 2 or to a printer according to the specifications of the key human power unit 1. Print it out using section 6. It also processes business programs sent from the host device through the communication circuit 2 and similarly sends the results to each section. When this device is not used for a predetermined period of time, a power off command is sent.

The power supply control unit]] monitors the voltage of the main battery 10 and controls the power supply to each part.If the key power unit 1 is not accessed for a predetermined period of time, it turns off the power of the main control unit 12. According to the command, the power supply by the main battery 10 is turned off.

(Problem to be solved by the invention) However, in the device with the above configuration, the time until the power supply is turned off when there is no access to the key power section is set to a constant value, so the set time If it is too long, the battery will be wasted, and if it is too short, the user will have to use unnecessary keystrokes frequently to prevent the power from turning off, resulting in problems with operability. was there.

In view of the above-mentioned problems, the present invention provides a portable data device terminal device that detects when the device is removed from the hand and turns off the power after a predetermined period of time has elapsed since the point of separation. The purpose is to

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a portable data device terminal device that is held and operated in the hand, in which a capacitive element is provided at an external position that is touched by the hand during operation. a touch sensor section that has a conductive member forming one electrode, and that determines whether a hand is in contact with the conductive member based on a change in capacitance of the capacitive element; and a touch sensor section that determines whether there is no contact with the conductive member. and a power supply control section that turns off the power when the time counter counts a predetermined time.

(Function) According to the present invention, when the device is held in the hand and the conductive part of the touch sensor part is touched, the conductive member is used as one electrode and the capacitance including the capacitance of the human body is A circuit is formed, and when you release your hand, its capacitance changes, and this change is detected and it is determined that your hand has not touched it. From then on, the time counter counts the elapsed time in that state, and a predetermined time is reached. When the time is counted, the power is turned off by the power control section.

(Embodiment) FIG. 1 is a block diagram of a circuit of a portable data device terminal device showing one embodiment of the present invention, and FIG. 3 is an external view of the portable data device terminal device.

In each of these figures, the same parts as in FIG. 2 are denoted by the same reference numerals, and the different parts will be mainly explained below.

13 is a main body of the apparatus, and the circuit shown in FIG. 2 is housed in the main body of the apparatus]3. 12A is a main control section that supervises and controls this device. Reference numeral 14 indicates a touch sensor section, and 5 indicates a metal plate serving as a conductive member of the touch sensor section 14. metal plate 1
5 are attached to both sides of the device main body 13, so that when the user holds the device main body 13 in his or her hand, the user's hand touches the device, and the touch sensor section 14 determines whether or not the user's hand is in contact with the device body 13. The signal is sent to the main control section 12A.

Reference numeral 16 denotes a time counter that counts the elapsed time during which the touch sensor unit 14 determines that the hand is not in contact.It is reset when it determines that there is no contact, and when a predetermined time has been counted, the main control unit The counting completion signal is sent to 12A. The main control unit 12A operates the touch sensor unit 14 and the time counting unit 16 except when the communication circuit unit 2 is communicating, and when receiving a counting completion signal from the time counting unit 16, the main control unit 12A operates the touch sensor unit 14 and the time counting unit 16. A power off command is sent to the target. Reference numeral 17 denotes a manual power switch, and when the power off command is sent and the power is turned off, the power supply is restored by turning off the switch 17 and then turning it on again.

Note that 18 is a connection code between the communication circuit section 2 and the host device;
Reference numeral 9 denotes print paper used in the printer section 6.

FIG. 4 is a circuit block diagram showing the configuration of the touch sensor section 14.

In the figure, 0801 is an oscillator on the detection side, and a metal plate]5 is connected as one electrode of a capacitance element for oscillation, and an external electrostatic charge such as a human body is connected to the metal plate]5. The circuit constants are set so that a sine wave signal of approximately 10 MH7 is oscillated when there is no contact between the capacitive elements. 0
3C2 is an oscillator on the reference side that similarly oscillates a sine wave signal, and C is a variable capacitor that adjusts its oscillation frequency, and the oscillation frequency is made to match the oscillation frequency of oscillator 08C1 when there is no external contact with the metal plate]5. ing. MIX is a mixer that mixes the output of each oscillator 08CI and 03C2,
[Metal plate] 5, each oscillator 03CI and 08C2
If the frequency is different, the output will contain a beat component. F is a notch filter for passing the beat component, and the filtering frequency is set to approximately 50 KHz. RFC is a rectifier circuit that rectifies and smoothes the output wave of the No-Sochi filter F, and CP is a rectifier circuit that compares the output level of the rectifier circuit RFC with a predetermined level to determine whether the oscillation frequencies of the oscillator OSCI and 03C2 match. It is a judgment unit that sets the judgment signal A to “0” when there is a match, and 1 when there is a difference.
”.

Next, the operation of the circuit shown in FIG. 1 will be explained. FIG. 5 is a flowchart showing the power-off control operation.

When the power switch 17 is turned on, the main control section 1.2A turns on the touch sensor section 14 if the communication circuit section 2 is not in communication.
and the time counting section 16 are specified to be in the operating state,
Touch sensor section] 4 performs power control processing based on the determination signal A.

When the apparatus main body 13 is held in a hand for operation, the hand touches the metal plate 15, and the detection side oscillator 08C1 oscillates at a different frequency from the reference side oscillator 08C2.

Therefore, a beat component is generated from the mixer MIX, and the determination signal A of the determination unit DEC becomes "1". In this state, the main control unit ]-2A waits for the determination signal A to become “O” (
Step SL).

When the operation is completed and the user releases the device main body 13 while leaving the power switch 17 on, the power control process continues.

The oscillation frequencies of each oscillator 08CI and 08C2 match, and the beat component of the mixer MIX disappears. As a result, when the judgment signal A becomes "0", the main control section 12A controls the time counting section 1.
6 is reset and reset (S2), and the time counter 16 counts up and down (S3). If the determination signal A remains at "0" (S4), the counting is repeated until a predetermined count value, for example, a count value set to about 1 minute is reached (S5). When the above-mentioned predetermined count value is reached, the time counting section] 6 is the main control section 1.
A counting completion signal is output to 2A. The main control unit 12A sends a power off command to the power supply control unit 1.1, and the power supply control unit 1 turns off each power supply from the main battery 10 (S6).

In step S4 during the above-mentioned counting, when the determination signal A changes to "1", the process moves to step Sl.

(Effects of the Invention) As explained above, according to the present invention, when the user takes the main body of the device out of his/her hand, the time it has been left unattended is monitored, and when a predetermined time has elapsed, the power is automatically turned off. Therefore, there is no unnecessary consumption of power, and there is no fear that the power will be turned off unexpectedly during operation, making it possible to provide a portable data device terminal device with improved economic efficiency and operability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a circuit of a portable data device terminal device showing an embodiment of the present invention, FIG. 2 is a block diagram of a circuit of a conventional portable data device terminal device, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a block diagram of the circuit of the touch sensor section, and FIG. 5 is a flowchart showing the power-off control operation by the circuit of FIG. 1. 10... Main battery, 11... Power control unit, 1
2A... Main control unit, 13... Device main body, 14...
Touch sensor section, 15... Metal plate (conductive member), 16
...Time counting section. Patent Applicant: Oki Electric Industry Co., Ltd. Agent Patent Attorney: Yoshi 1) External view of Ichinoki Takamoto's invention of Ichinoki Obi Contractor + Delivery Device Vertical Device

Claims (1)

[Scope of Claims] A portable data device terminal device that is held and operated in the hand, has a conductive member forming one electrode of a capacitance element at an external position that comes into contact with the hand during operation; a touch sensor unit that determines whether or not a hand is in contact with the capacitance element based on a change in capacitance of the capacitive element; a time counter unit that counts the time during which the touch sensor unit determines that there is no contact; and the time counter unit. 1. A portable data device terminal device, comprising: a power supply control unit that turns off the power when a predetermined time has been counted.