JPS5815919Y2 - Digital Shikiden Shitokei Sochi - Google Patents

Description

[Detailed description of the invention] The invention relates to a digital electronic timepiece device.
Its purpose is a simple structure with 12 hour display and 24 hour display.
The object is to be able to display time and both.

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

The apparatus of this embodiment can be roughly divided into the following three parts.

That is, a clock drive circuit A that outputs an hour signal, a minute signal, and a second signal, a time display B that receives signals from the clock drive circuit A and displays the time, and a clock drive circuit A that outputs a time signal. It is inserted between display B and displays 12 hours.
This is a group C of interlocking changeover switches for switching the 24-hour display.

First, to explain the clock drive circuit A, a pickup signal from a commercial power supply with a frequency of 50 Hz or 60 Hz applied to a terminal 1 is passed through a waveform shaping circuit 2 and a frequency dividing circuit 3.
The signal is converted into a second signal, which is a reference signal, and applied to the counting circuit 4.

A required bias voltage is applied to the terminal 5 depending on whether the frequency of the signal applied to the terminal 1 is 50Hz or 60Hz, and the frequency divider circuit 4 is controlled so that the output terminal of the frequency divider circuit 4 always has a second It is configured to generate a signal.

Next, the counting circuit 4 to which this second signal is applied is composed of a second counting circuit 61, a minute counting circuit 72, and a clock counting circuit 8.
Each outputs a minute signal, an hour signal, and a 10 o'clock signal.

These time signals for seconds, minutes, hours, and 10 o'clock are applied to the display drive circuit 9, where they are converted into signals that can operate the time display B.

The display drive circuit 9 is brought into operation by the bias voltage applied to the terminals 10 and 11, and the seconds, minutes, and
The seconds digit of time display B receives the hour and 10 o'clock time signals.
It outputs signals for operating the display elements for the minute digit, 10 minute digit, hour digit, and 10 o'clock digit, as well as signals for displaying AM and PM.

In this embodiment, the output signals for the seconds, minutes, 10 minutes, and hour digits are not relevant, so their explanation will be omitted, and the following explanation will be given using only the output output amount for the 10 o'clock digit and the output signals for AM and PM display. .

Note that among the output terminals 12° 13.14 of the clock drive circuit A, the output terminal 12 is the output terminal for displaying the afternoon (PM), the output terminal 13 is the output terminal for displaying the morning (AM), and the output terminal 14 is for the 10 o'clock digit. Use as an output terminal.

Control terminal X of clock circuit A is a bias input terminal for distinguishing between 12-hour display and 24-hour display; when no bias voltage is applied to this terminal X, 12-hour display is displayed, and when bias voltage is applied, it is a bias input terminal. Then, the display drive circuit 9 is switched to perform a 24-hour display.

Next, to explain about time display B, this time display B
is composed of a fluorescent display tube and displays AM and PM.
, PM display elements 15 and 16, display elements 17 to 20 that display each digit of 10:00, 1:00, 10 minutes, and 1 minute, and display elements 17 to 20 that display the digits of 10 o'clock, 1 o'clock, 10 minutes, and 1 minute, and distinguish between the hour display element and the minute display element, and It has a display element 21 that repeatedly flashes at a certain rate to display seconds.

Each of the display elements 17 to 20 has seven segments (
It is composed of ``graphemes''.

A filament voltage is applied to the terminals 22.23 of the time display B, a grid voltage is applied to the terminals 24.25, and the segments of each of the display elements 17 to 21 serve as anodes.

The grid electrode and anode electrode are biased at the same potential,
It is set so that electrons can easily flow.

As mentioned above, in this embodiment, each digit display element for 1 hour, 10 minutes, 1 minute, and seconds is not relevant, so the explanation will be omitted, and the following 10 minutes will be used.
Hour digit display element 17 and AMlPM display elements 15 and 16
I will explain about it.

Now, the seven segments of the 10 o'clock digit display element 17 are referred to as a), b), C), d, e, f, and g, respectively, as shown in the figure.

For example, the number 2 is composed of a combination of as bSgv es d segments.

The changeover switch group C for switching between the 12-hour display and the 24-hour display has a movable contact l and fixed contacts m and n, and is composed of four interlocking switchover switches 26 to 29.

Next, the connection relationship between the changeover switch group C, the clock drive circuit A, and the time display B will be explained.
．． The output terminals 14 for the 10 o'clock digit each have a changeover switch 26.
~28 movable contacts 1.

The output terminal 14 for the 10 o'clock digit is also connected to the segment C of the 10 o'clock digit display element 17.

Further, a bias voltage of 10 B is applied to the movable contact l of the changeover switch 29.

Next, one fixed contact m of the changeover switch 26, together with the other fixed contact n of the changeover switch 28, connects the 10 hour digit display element 1.
7 segment C.

The other fixed contact n of the changeover switch 26 is connected to the PMM indicating element 16.

One fixed contact m of the changeover switch 27 is connected to the segments a, d, e, and g of the 10 o'clock display element 17, and the other fixed contact n is connected to the AMM display element 15.

One fixed contact n of the changeover switch 29 is connected to the control terminal X of the display drive circuit 9.

In addition, the fixed contact m of the changeover switch 28 and the changeover switch 29
The fixed contacts n are all contacts.

Next, the operation of this device will be explained.

First, when a 12-hour display is desired, the movable contacts 1 of the changeover switches 26 to 29 constituting the changeover switch group C are connected to the fixed contact n side.

In this state, the output terminals 12 to 14 of the clock drive circuit A are output to the AMM display element 15 and the PM display element 1 and 10 of the time display B, respectively.

Therefore, either the PMM indicating element 16 or the AMM indicating element 15 emits light in response to the PM display signal and AM display signal appearing at the output terminals 12 and 13 of the clock drive circuit A, thereby indicating whether it is PM or AM.

Furthermore, the segment b1c of the 10 o'clock digit display element 17 emits light due to the 10 o'clock digit display signal appearing at the output terminal 14, and the number 1 is displayed.

Therefore, together with the light emitting state of the hour digit display element 18,
10 o'clock, 11 o'clock, and 12 o'clock are displayed.

This display is performed regardless of whether the AM or PM display element is emitting light.

Next, when a 24-hour display is desired, the movable contacts 1 of the changeover switches 26 to 29 constituting the changeover switch group C are connected to the fixed contact m side.

In this state, the clock drive circuit A is
A bias voltage is applied to the display drive circuit 9 of the display device 9, and the circuit 9 is switched to perform a 24-hour display operation.

In this case, no output signal appears at the output terminals 12 to 14 of the clock circuit A during the time digits 0 to 9.

Next, when the hour digit is from 10 to 19, an output signal appears at the AMM display output terminal 13 and the 10 o'clock digit output terminal 14.

AMM indication output terminal 13 is connected to 1 via changeover switch 26.
Since the output terminal 14 for the 10 o'clock digit is directly connected to the segment B of the 0 o'clock digit display element 17 and the segment C of the 10 o'clock digit display element, the 10 o'clock digit display element emits the number 1.

Next, when the hour digit is between 20 and 23, the clock drive circuit A
Output signals appear on both AM and PM display output terminals 13 and 14.

These signals are passed through changeover switches 26, 27 to the segments as l) x g) el of the 10 hour display element 17.
d is applied to cause the segment to emit light, and the number 2 is emitted.

In this manner, the device of this embodiment switches the signals appearing at the output terminals 12 to 14 of the clock drive circuit A between 12-hour display and 24-hour display by operating the four interlocking changeover switches 26 to 29. At the same time, the connection of the seven segments (graphemes) a"-g that make up the 10 o'clock digit display element 17 is switched, and when displaying 12 hours, the number 1 or 2 is changed.
It is constructed so that the numbers 1 and 2 can be displayed when displaying 4 hours.

As described above with respect to one embodiment, the digital electronic timepiece device of the present invention is provided between the timepiece drive circuit that can output a 12-hour display signal and a 24-hour display signal and the time display that displays the time. A changeover switch is inserted, and the changeover switch changes the connection of the characters of the 10 o'clock digit display element of the time display, so that both 12-hour display and 24-hour display can be selectively displayed. ,
This is a practical dog that can display either 12-hour or 24-hour display with a simple configuration.

[Brief explanation of the drawing]

The drawing is a circuit configuration diagram showing an embodiment of the device of the present invention. A... Clock drive circuit, B... Time display, C... Changeover switch group, 2... Waveform shaping circuit, 3...・Frequency divider circuit, 4...
Counting circuit, 6...Second counting circuit, 7...
Minute counting circuit, 8... Clock counting circuit, 9...
-Display drive circuit, 26-29...changeover switch.

Claims (1)

[Scope of utility model registration request] A clock drive circuit capable of outputting a 12-hour display signal and a 24-hour display signal, and a time display device that displays the time, are provided to distinguish the clock drive circuit into a 12-hour display signal and a 24-hour display signal. A changeover switch interlocked with the selection switch is inserted, and the changeover switch selects an AM signal applied to the morning (AM) display element, a PM signal applied to the afternoon (PM) display element, and 10 out of the output signals from the clock drive circuit by the changeover switch. Digital % type configured to change the combination of glyphs of the 10 hour digit display element by switching connection to the hour digit display element and to selectively display both 12 hour display and 24 hour display. %