JPS5922591Y2 - Arithmetic unit - Google Patents

Description

[Detailed explanation of the invention] The present invention relates to an arithmetic unit, which has a specific arithmetic unit that operates all the time, and an arithmetic unit different from the specific arithmetic unit that operates only at any time. This invention relates to an arithmetic unit with limited power consumption.

Traditionally, so-called composite products include electronic clocks and frequency counters, and electronic clocks and electronic calculators, which consist of an electronic clock that is constantly operating, and a frequency counter or electronic calculator. It had a part that operated only at arbitrary times, and the display was dual-purposed by displaying only one of the parts.

Therefore, when any one of the multiple functions is operating, power is supplied to almost all the parts, which consumes a large amount of power.

Also, among the above-mentioned composite products for car use, there are some that only turn off the display when the engine key is removed;
Since the display is not displayed by inputting a blanking signal to the display driver, and the arithmetic unit and driver are still working, their power consumption is unavoidable.

However, in electronic devices powered by portable power sources, it is necessary to reduce wasteful power consumption as much as possible, especially when the devices have circuits that are constantly operating.

This proposal was created in consideration of the above points, and combines a function that operates all the time, like a health management device such as a step meter, and a function that operates only at arbitrary times, such as an electronic scale or electronic calculator. In this case, when the always-operating function is working, the power consumption of other functions including the display is cut off to reduce power consumption. The main proposal will be explained in detail.

The figure is a block diagram of the arithmetic unit of the above-mentioned embodiment of the present invention.

1 is a detection unit that outputs one pulse when a person takes a step.

For example, it is separated from the vibrator and the switch circuit element.

2 is a counter that counts the signals sent from the detection section 1, and when there is no signal, the result is stored until the next signal comes in or until it is reset by a reset means (not shown). Hold.

3 is a display register which sends given contents to the display section 4;

The display section 4 includes a display device made of liquid crystal, a light emitting diode, etc., and a driver circuit if necessary.

Reference numeral 5 denotes an arithmetic control section which outputs a control signal for the gate 6 which selects the input signal to the display register 3, sends and receives data to and from the memory 8 according to the signal from the input section 7, and performs various arithmetic operations. etc. is output.

Reference numeral 9 denotes a normally OFF power switch, which is interlocked with a normally ON signal switch 10 located between the detection section 1 and the counter 2.

In the figure, 10B indicates a power source, particularly a portable power source such as a dry battery.

In the arithmetic unit having the above configuration, the power switch 9 is turned to O.
If a person carries this computing unit with the FF set, a signal will be output from the detection unit 1 every time he or she walks.

Since the signal switch 10 is turned on, this detection section 1
The output signal of is counted by the counter 2.

Since all other blocks such as the display register 3 are powered off, only the counter 2 consumes power, which is an extremely small amount.

When you want to know the contents of the counter 2 or calculate something, turn on the power switch 9.

At this time, the smaller and lighter the computing unit is, the more various vibrations will be transmitted to the computing unit, but since the signal switch 10 is turned off at the same time as the power switch 9 is turned on, these vibrations are transmitted to the input of the counter 2. Miscalculation of the number of steps can be avoided.

If the switch circuit element of the detection unit 1 requires power, such as an optical coupler, a normally ON switch may be inserted in the power line of the switch circuit element instead of the signal switch 10.

By operating a predetermined key on the input section 7, the gate 6 opens toward the counter 2 for a predetermined period of time, and the contents of the counter 2 are transferred to the display register 3.

Therefore, the number of steps taken is displayed on the display section 4.

Further, in general calculations, the gate 6 is opened to the arithmetic control section 5 for a predetermined period of time by manipulating the numerical keys and operation keys of the human power section 7, and the arithmetic results etc. are transferred to the display register 3 and displayed.

Furthermore, if data can be sent and received between the contents of the display register 3 and the arithmetic control section 5, by operating the arithmetic key after transferring the contents of the counter 2 to the display register 3, the number of steps can be calculated, for example. Walking distance (step distance) can also be obtained by multiplying the walking length.

If this is not necessary at all, the circuit may be configured so that the contents of the counter 2 are immediately displayed on the display section 4.

As mentioned above, the present invention provides a computing unit that includes means for supplying power, a plurality of computing units, and a display unit.
In the above example, when the counter 2) is operating, the power to the other calculation units and the display unit is cut off, and when the other calculation units are operating, the calculation unit operates only to hold and transfer data. Since the power is limited, power consumption is efficient and the life of the portable power source is significantly extended.

Note that the present invention is not limited to the above-mentioned embodiments.
For example, if there is a constant that must be multiplied when displaying the contents of counter 2, a specific register for storing this constant may be included in the specific calculation section, within the scope of the present invention. Can be applied.

[Brief explanation of the drawing]

The figure is a block diagram of an embodiment of the present invention. 2...Counter, 4...Display unit, 5...Calculation control unit, 9...Power switch, 10B...Power source.

Claims (1)

[Scope of utility model registration request] In an arithmetic unit having a power supply means and a plurality of arithmetic units and display units, a specific arithmetic unit is always energized, and other arithmetic units and display units are energized by turning on a power switch. Therefore, when a specific calculation unit is operating, the power to other calculation units and display units is cut off, and when the power switch is turned on and other calculation units and display units are operating, the power is turned off in conjunction with the power switch. A computing unit characterized in that the operation of a specific computing unit is restricted by a switch.