JPS5919314B2 - Electronic clock with computer - Google Patents

Description

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

In recent years, wristwatches that display the time digitally using electro-optical display devices such as liquid crystals, light-emitting diodes, or electrochromic materials have rapidly developed, and with the development of integrated circuits, they have become smaller and more multifunctional. , long life, etc. are also sufficient for practical use. For example, the battery life of a crystal oscillation type digital wristwatch that uses liquid crystal for its display is already two years. On the other hand, electronic desktop calculators, like wristwatches, have become smaller and more functional with the development of integrated circuits, and low-power display devices such as liquid crystals have come to be used for display devices. The present invention focuses on the common features between the above-mentioned electronic calculator and a digital display wristwatch, and provides a wristwatch with an electronic calculator that can house the digital wristwatch and the electronic desktop calculator in the same wristwatch case and display the time and calculation functions on the same display device. This is to save power consumption of the electronic computer part of the computer. FIG. 1 is a system block diagram of an electronic timepiece with a computer according to the present invention, and 1 is a digital timepiece system, which is roughly composed of an oscillation circuit, 2 frequency dividers, 3 counters, 4 drive circuits, 6 power supplies 7, and the like.

On the other hand, the system of the electronic computer 10 includes a calculation oscillation circuit 11,
The keyboard 16 is generally composed of an arithmetic circuit 12, a display device 13, a power supply device 20, and a keyboard 16 including number keys, calculation keys, and the like. The power supply device 20 of the computer 10 includes a battery 18
, a boosting oscillation circuit 14, and a boosting circuit 15.

Reference numeral 21 denotes a control circuit for controlling the operation of the arithmetic oscillation circuit 11 and the boosting oscillation circuit 14 in cooperation with the keyboard to reduce power consumption in the computer section as much as possible;
An example of the configuration is shown in FIG.

FIG. 2a shows the input detection circuit 22 of the matrix keyboard, which also includes a buffer circuit.

Consisting of a timer circuit 23 and an oscillation frequency conversion circuit 24,
The oscillation frequency conversion circuit 24 changes the oscillation frequency of the arithmetic oscillation circuit 11 and the boost oscillation circuit 14, or changes the oscillation frequency from the stopped oscillation state to the oscillation state. That is, it detects that the keyboard is operated and causes the oscillation circuit to oscillate for a timer period, or converts a low oscillation frequency to a high oscillation frequency. Figure 2b shows a circuit 2 for detecting keyboard input signals of an electronic computer.
In this system, the timer circuit 23 is activated by the signal from the timer circuit 2, and the power supply of the electronic computer is kept in the ON state only for the timer period by the signal from the timer circuit 23.

FIG. 3 shows an implementation circuit diagram which is a more specific implementation of the block diagram shown in FIG.
Since pulse voltages with different phases are applied to ~T6, when any key on the keyboard 16 is operated, the line K1~
A clock pulse voltage is applied on K4 and therefore 0R
When a key on the keyboard 16 is pressed, a clock pulse voltage always appears in the human input detection circuit 22 consisting of a gate, and is applied to the flip-flop 26 and the timer circuit 23.

The clock pulse is normally about 60 Hz, and the timer may be a counter of about 30 seconds to 1 minute, for example. The flip-flop 26 is inverted by the clock pulse from the input detection circuit 22, causing the calculation oscillation circuit 11 and the boost oscillation circuit 14 to oscillate, and the timer circuit 23 which operates the calculation circuit 12 to operate the calculation circuit 12 for a predetermined period of time after the clock pulse from the keyboard is no longer input. Afterwards, the output is output and the flip-flop 26 is inverted to stop the oscillation of the calculation oscillation circuit 11 and the boost oscillation circuit 14, or to set the frequency to a low state. In FIG. 4, the control device of the present invention is used in the boost oscillation circuit 14, and the output signal of the flip-flop 26 causes the transistor 27 to turn on. 0ff, the oscillation circuit 14 can be brought into an oscillating state or a stopped state.

In FIG. 5, the power supply circuit is configured such that the transistors 28 are turned on, . This is a case where the power supply to the entire computer is stopped by turning it off. Also timer circuit 2
By using 3, power is not supplied to the computer for more than a certain period of time, so the power does not turn off automatically even if the power switch is not turned off after using the computer section, reducing battery consumption. It has great effects, such as being able to

[Brief explanation of the drawing]

The drawings show a computer wristwatch according to the present invention, FIG. 1 is a block diagram thereof, FIGS. 2A and 2B are block diagrams of a power saving method for the computer section, and FIG. 3 is an embodiment of the power saving method. FIG. 4 is a circuit diagram showing an embodiment of the oscillator section switch method, and FIG. 5 is a circuit diagram showing an embodiment of the power supply section switch method. 16...Keyboard, 21...Inertia (a)
Circuit, 22... Input detection circuit, 23...
・Timer circuit, 26...Flip-flop,
27, 28...transistor.

Claims (1)

[Claims] 1. In an electronic watch with a computer, a key input detection circuit that receives part of the matrix line group of the operation keys of the computer as input, and a booster circuit that has two types of oscillation frequencies to supply power to the computer. An oscillation circuit, a flip-flop circuit for keeping the oscillation frequency high by the output of the key input detection circuit and low by a timer circuit, and two types of voltages are generated by the boost oscillation circuit. An electronic timepiece with an electronic computer, characterized in that it has a booster circuit for supplying a power supply to an electronic computer, and an arithmetic circuit for the electronic computer that is controlled by the output of the booster circuit.