JPS5851632B2 - Computer wristwatch - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electronic wristwatch with a computer.

With the development of digital display wristwatches using liquid crystals, light emitting diodes, etc., digital display wristwatches with electronic computers have been added as one of the additional functions of the digital wristwatches.

In electronic computer digital wristwatches, the computer function must be housed in a limited space in order to maintain the appearance of a wristwatch.

Furthermore, the power consumption of a digital watch can last for about two years with a small battery for a wristwatch if there are few additional functions, but this is not necessarily guaranteed for two years if there are many additional functions.

In particular, when an electronic computer is used as an additional function, power consumption increases depending on the frequency of use of the calculation function, and a dedicated battery must be provided in addition to the battery that operates the clock function.

The present invention is intended to reduce the current consumption of electronic calculation functions as much as possible.

The electronic computer part consumes a lot of current in the computer oscillation part display part.When using an electronic computer, there is no need to display numerical values for a long time and keep the counter running, and it is possible to display the value only for the time it takes to read it and then If the light is turned off automatically, the numerical value is stored in a register in the electronic computer circuit, and the display is called up when necessary, the current consumption can be greatly reduced.

FIG. 1 shows an embodiment of the current consumption saving method of the present invention.

1 is a high frequency oscillation circuit, 2 is a low frequency oscillation circuit, 3 is an electronic computer circuit, 4 is a dynamic register, 5 is a drive circuit, and 6 is a display device.

7 is a key input circuit, and 8 is a keyboard.

Reference numeral 9 denotes a power switch for the electronic computer, and when the computer is used, when turned on, the low frequency oscillation circuit 2 and the control circuit 11 are activated, and the dynamic register 4 is activated.

Next, when a numeric key or function key on the keyboard is pressed, a signal indicating that the numeric key has been pressed enters the control circuit 11, and the signal applied to the line 12 is released, and the high frequency oscillation circuit 1 is activated. do.

The high-frequency oscillation circuit operates at a frequency of, for example, a speed necessary for electronic computer operation of about 300 KC, based on the operation command signal from the keyboard 8, and operates for a certain period of time, for example, 30 seconds after the key signal from the keyboard 8 disappears. After the high frequency oscillation circuit 1 electronic computer circuit 3 drive circuit 5 and display device 6 are activated, the electronic computer circuit is stopped by a timer signal from the control circuit, and the contents of the electronic computer circuit are stored in the dynamic register. .

Since the dynamic register is maintained only by the signal from the low frequency oscillator, the current consumption is extremely small.

The contents stored in the dynamic register can be called up and displayed using the operation keys 15, and calculations can be continued using the numerical values.

FIG. 2 shows another embodiment of the present invention, in which a power supply is switched instead of an oscillator.

The key input circuit 7 causes a timer circuit in the control circuit 11 to send a switching signal to the wire 2 for a certain period of time, for example, about 30 seconds.
2 and inputs a steady voltage, for example, about 6V, to an electronic computer circuit to operate it.

When the operating time of the timer expires, the voltage of the low voltage 21,
For example, at a low voltage of 1.5V, the electronic computer 3 drive 5 display 6 etc. will not operate, and only the static register 16 will be able to memorize and maintain the contents of the register, so current consumption will be extremely low during this period. Very little.

The contents of the register can be recalled again and calculations can continue.

As mentioned above, the electronic computer wristwatch of the present invention is designed to reduce the current consumption as much as possible even for a short period of time while using the computer, and this is effective when using a battery with a small capacity like a computer wristwatch. Thick.

[Brief explanation of drawings]

FIG. 1 is a circuit block diagram showing a method for switching the oscillation circuit in one embodiment of the present invention, and FIG. 2 is a circuit block diagram showing a method for switching the power supply in another embodiment of the invention. 1...High frequency oscillator, 2...Low frequency oscillator, 3...Electronic computer circuit, 4...
Dynamic register 16...Static register 20...Standard power supply, 21...
...Low voltage power supply, 8...Keyboard, 11...
...control circuit.

Claims (1)

[Claims of Claims] 1. A wristwatch with an electronic computer is provided with a high frequency oscillator and a low frequency oscillator, the high frequency oscillator is set to obtain a clock pulse for the electronic computer, and the low frequency oscillator is set to the lower limit frequency that can be stored in a dynamic register for storage. A wristwatch with an electronic calculator, characterized in that when not operating as a calculator, the dynamic register stores and maintains set numbers or calculated values at a minimum power frequency. 2. A wristwatch with a computer is equipped with a high-voltage power source and a low-voltage power source. The high-voltage power source is normally used for the computer, and the low-voltage power source is used by the static register of the computer circuit to operate the computer. An electronic wristwatch with an electronic calculator characterized in that the voltage is set near the lowest voltage for memorizing and maintaining set numbers or calculated values during times other than normal operation.