JPS584318B2 - Digital Tartokeisouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a digital display type timepiece device equipped with an alarm means.

Conventionally, in analog display type clock devices, the basic time is determined by, for example, a balance wheel, hours, minutes, and seconds are created by the ratio of gears, and the information is basically displayed on a circular display board.

In this case, the display board divides the circumference into 12 equal parts and divides the circumference into 1 to 1 parts.
By adding the number 2, it is divided in a so-called analog manner.

In the method of indicating time using the long hand, short hand, and second hand in this manner, it is well known that an alarm device such as a bell is attached to generate an alarm at a predetermined time.

In this case, a hand for setting the alarm time is provided on the circular display board, and it is extremely easy to read how many hours remain until the alarm generation time, for example, between the hand and the hour hand.

This is because each of the hands can be used as a kind of slide rule on the display board.

However, when considering this for digital display type clock devices, they display only the current time numerically, which is more convenient in that they can be read directly compared to analog display types, but they are more convenient than analog display type clock devices, such as the slide rule mentioned above. It cannot have a function.

Therefore, when a digital clock device is provided with an alarm means, it is not possible to easily know the time until the set visual report generation time unless two display devices are provided.

It also has the disadvantage that it is not easy to do numerical calculations mentally because it is based on sexagesimal system.

The present invention has been made in view of the above points, and an object of the present invention is to provide a digital display type clock device that can easily and accurately determine the time until the alarm generation time.

An embodiment of the present invention will be described below with reference to the drawings.

First, FIG. 1 shows an example of a generally considered digital clock device with an alarm device. A basic oscillator 11 is a drive source that can simultaneously drive a counter 12 for displaying time and a counter 13 for setting alarm time. It consists of a crystal oscillator frequency divider circuit, etc.

The time display counter 12 is connected to a digital display device 15 via a display decoder 14 to display the current time.

On the other hand, the alarm time setting counter 13 is connected to the alarm time annunciator 17 via an annunciator driver 16, and is activated by detecting, for example, the coincidence of the numbers set in both the counters 12 and 13. There is.

Although not shown in detail, the clock device is of course equipped with mechanisms such as a time setting switch and a switch for setting the alarm generation time.

FIG. 2 is a block diagram of a digital clock device showing one embodiment of the present invention.

Here again, the structure including the alarm means is basically the same as described above, and the same parts as in FIG. 1 are given the same numbers and the explanation thereof will be omitted.

The contents of the two counters 12 and 13 are calculated by a subtracter 18 operated by a changeover switch (not shown).
This makes it possible to finally read out the difference in the content of the numbers.

That is, the same display device 15 can appropriately display the current time, and can also display the time from the current time to the alarm generation time.

In this case, the alarm driver 1 that drives the alarm 17
6 can use the calculation result of the -L notation subtractor 18.

As described above, according to the present invention, it is possible to display the time difference between the alarm generation time and the current time in a digital display type clock device, so that the reading can be performed using a conventional analog display type clock device. No less easy and timely.
It is possible to provide a digital clock device that can extremely accurately display minutes and seconds.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a digital clock device equipped with an alarm device, and FIG. 2 is a block diagram showing an embodiment of the present invention. 11...Basic oscillator, 12...Counter for time display, 13...Counter for setting alarm time, 18...Subtractor.

Claims (1)

[Claims] 1 A basic oscillator, a time display counter driven by the basic oscillator, an alarm time setting counter for setting the alarm occurrence time, an alarm means activated at the alarm occurrence time, and a time display counter for setting the alarm occurrence time. A subtracter obtains the difference between the contents of the alarm time setting counter and the content of the time display counter or the difference obtained by the subtracter is decoded to determine the current time or the time from the current time to the alarm occurrence time. A digital clock device comprising: means for displaying.