JPS6020075Y2 - Analog display electronic clock - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an analog display electronic timepiece in which the time is displayed using a three-hand system similar to a pointer system.

In conventional electronic watches, the time is either displayed directly in numbers or by the rotation of the hands, similar to conventional pointer-type watches.

With this hand-type display, it is possible to intuitively read not only the current time, but also time intervals such as the time from that time to a certain time, or the elapsed time from the previous time.

By the way, the display proposed for the conventional pointer-type analog display electronic watch is that one of the 60 rod-shaped display elements formed radially is selected according to the hour signal of the time signal to display the short hand, and one is selected similarly according to the minute signal. It has been proposed to select a book and display it with a long hand, and also display a second signal with a long hand.

However, in this type of display, when displaying the second signal, the selected display element is displayed for one second.
Therefore, the second hand appears to stop for one second, and at the same time, the minute hand and hour hand also appear to stop.

For this reason, at the moment of looking at this clock display device, it may be difficult to distinguish whether the long hand indicates seconds or minutes.

This device makes it possible to immediately distinguish between minute and second displays by changing the length or position of the light-emitting part of the rod-shaped display element when displaying seconds and when displaying hours. Make it.

Next, an embodiment of the analog display type electronic timepiece according to this invention will be described with reference to the drawings.

Rod-shaped display element S.

-559 six points are formed on the insulating substrate 11 at equal angular intervals over 360 degrees.

A rod-shaped anode 12 is formed at each display element position on the insulating substrate 11, and a phosphor layer 13 is formed on each of these anodes 12 to form a display element.

Each rod-shaped display element S.

Display element S to display -559 as short hand and long hand
A disk-shaped inner grid G1 is provided facing the 0 to S59 and centered on the radial center of the disk, and a donut-shaped outer grid G2 is disposed at the same center on the outside of the grid G1. .

- Provided opposite to S59. Also, in this example, there are display elements T showing time display positions on the outside of every fifth display element.

-T11 is provided facing the outer grid G2.

These grids G1. A plurality of cathodes 14 are provided on the opposite side of the substrate 11, facing G2, and further covered with a transparent glass cover 15 from the outside and fixed to the substrate 11.

This equal display element S.

An electric circuit for selectively displaying light emission from S5g to S5g based on a time signal is constructed, for example, as shown in FIG.

The output signal from a relatively stable oscillator 17 such as a crystal oscillator is frequency-divided by a frequency divider 18, and further frequency-divided by a divider 19 to produce a 1-second period signal (hereinafter referred to as 1-second signal). can get.

This one second signal passes through the NADN gate 21 and is counted by a second counter 22 which is an ω-adary counter.

The 1-minute cycle signal which is the carry output is similarly counted by the minute counter 23 of the ω-adary counter.

The least significant bit of the frequency division counter is set to 1 by the frequency division circuit 24.
The frequency is divided by 2, and the clock every 12 minutes thereafter is applied to the counter 25 when it is a 6-bit counter.

These seconds counter 22, minute counter 23, hour counter 2
5, the count contents are given to buffer circuits 26, 27, and 28, respectively.

? Pulses from the oscillator 29 of unidirectionally distributed KHz to several tens of KH2 are counted by a ternary ring counter 31, and outputs are sequentially and repeatedly obtained at its three output terminals Q and -Q.

The oscillator 29 and ring counter 31 constitute a switching display signal generator, and the outputs of the output terminals Q1 to +Q3 are called a second display signal, a minute display signal, and an hour display signal, respectively.

The buffer circuits 26, 27 and 28 supply the contents of the corresponding counters to the decoder driver 32 only when the switching display signal is applied to their chip select terminals.

The decoder driver 32 reads the received count contents from O to 59.
The display element S of the display device 33 decoded into any one of the above and described with reference to FIGS. 1 and 2.

-359 counterpart.

When adjusting the time, the switch 34 is controlled to invert the flip-flop 35 and close the NAND gate 21.
The NAND gate 36 is opened, and the switch 37 switches the input side of the NAND gate 36 to the output side of the oscillator 17 to enable high-speed time correction. By switching the end, it is possible to adjust the time at a low speed.

The output of NAND gate 36 is provided to seconds counter 22.

In the proposed system, instead of displaying seconds whose contents change every second, 0. Display each hoe.

Therefore, the duty of the second signal output from the frequency dividing circuit 19 is 5.
0%, which is supplied to the NAND gate 38,
The NAND gate 38 has a terminal Q1 of the ring counter 31.
The chip select terminal of the buffer circuit 26 is controlled by its output.

The respective outputs of the terminals Q2 and Q, that is, the minute display signal and the hour display signal, are applied to respective chip select terminals of the buffer circuits 27 and 28, respectively.

At the same time, the output of the terminal Q3 is applied to the outer grid electrode G2 of the display 33 through the inverter 41.

Therefore, when the contents of hour counter 25 are supplied to display 33, grid G2 is at a low level, and at other times grid G2 is at a high level.

A high level is always applied to the grid G1 from the terminal 42.

For example, when displaying 0:03:05 as shown in Figure 4, terminals Q~Q are repeatedly set to high level in sequence.
The contents of the second counter, minute counter, and hour counter are selected and provided to the decoder driver 32, respectively.

This is repeated at a high rate of several KHz.

The inner grid G□ is always at a high level, but the outer grid G2 is at a low level when the terminal G3 is at a high level.

When the terminal Q1 is at a high level, the contents of the second counter 22 are given to the decoder driver 32, 5 seconds are decoded, and the display element S becomes a high level, and the display element S5 emits light over its entire length to indicate that 5 seconds have passed. Is displayed.

Next, when the terminal Q2 becomes high level, the content of the minute counter 23, 3 minutes, is decoded and the display element S3 is similarly illuminated over its entire length.

Next, when the terminal Q3 becomes high level, the content O of the hour counter 25 is decoded and the display element S is decoded.

is displayed by emitting light, but at that time, since the level of the outer grid G2 is low, only the portion facing the inner grid G□ emits light and is displayed as an hour hand.

Since these displays are repeated at high speed, each display is 0.
Hours 3 minutes and 5 seconds seem to be displayed all the time.

Regarding the minute display and hour display, the display element S3 emits light every time the terminal Q2 becomes high level for 1 minute after 0:03, and similarly, 12 minutes after 0:00.

During this period, an hour hand is displayed each time the terminal Q3 becomes high level.

However, regarding seconds display, as shown in FIG. 5A, the duty of the output of the frequency dividing circuit 19 is 50%, so
Since the ND gate 38 is controlled, even if the output of terminal 7-Q becomes high level, the contents of second counter 22 are displayed only in the first half of that one second j, but in the second half, terminal Q1 becomes high level. This is also not provided to the second buffer circuit 26.

Therefore, when changing sequentially from 5 seconds to 7 seconds, for example, the display element S5 is selected as shown in FIG. It is between the hoe, and then 0. After the hoe break, the display element S6 is displayed for 0.5 seconds.

In this way, the second counter 22 changes its state and maintains that state for one second, during which only the O0 Kuwama is displayed.

Because of this display, the seconds display appears to be blinking compared to the minutes display, and when looking at the clock display 33, it is possible to instantly distinguish between the second hand and the minute hand.

In other words, even though the second display and the minute display use the same display element and are displayed with the same length, they can be immediately distinguished.

Also, by blinking in this way, the movement of the second hand can be more clearly seen.

In the above example, the seconds and minutes can be changed by displaying only a short period of time, such as half (this value can be arbitrarily selected), without displaying the entire period of 1 second, which is the display period of the seconds signal. Although the distinction from the display has been made clear, the display voltage is not applied to the second hand and minute hand, which rotate as long hands, in the middle of their lengths and at positions facing the gap between the inner grid electrode and the outer grid electrode. As a result, the light emitted is slightly weaker, giving an even more unnatural feel to the second hand, which rotates the fastest.

Therefore, this invention is an improvement in which the second display is distinguished from the minute display by displaying only the portion corresponding to the grid G2 of the display element.

In FIG. 6, parts corresponding to those in FIG. 3 are given the same reference numerals, and in this example, the output of the output terminal Q1 of the ring counter is applied to the first grid G1 through an inverter 44.

As a result, as shown in Fig. 7 corresponding to Fig. 4, the grid G becomes low level when the terminal Q1 is high level, and when the seconds are displayed, the display voltage is applied only to the grid G2. Selected display element S.

Only the portion of the display element facing the outer grid G2 emits light.

In this way, by adding only one inverter 44, the second display and the minute display can be easily distinguished even if the same display element is used for the minute display.

Furthermore, what is shown in FIGS. 3 and 6, respectively, is to display a part of the period during which the second counter maintains one state, rather than the entire duration, and to display the seconds display in a flashing manner. It can also be combined with displaying only the outside part.

In FIG. 8, parts corresponding to those in FIGS. 3 and 6 are shown with the same reference numerals, and their explanation will be omitted.

[Brief explanation of drawings]

Figure 1 is a plan view showing an example of the display of the analog display type electronic timepiece according to this invention, Figure 2 is its sectional view, and Figure 3 is an example of the electrical circuit of the proposed analog display type electronic timepiece. A block diagram, FIG. 4 is a waveform diagram to explain its operation, FIG. 5 is a waveform diagram showing the changing state of the second display, and FIG. 6 is an example of the electrical circuit of the analog display electronic timepiece according to this invention. 7 is a waveform diagram for explaining its operation, and FIG. 8 is a block diagram showing another example of the electric circuit of the electronic timepiece according to this invention. So~S59: Rod-shaped display element, G1. G2 Nigerid,
22: Second counter, 23: Minute counter, 25: Hour counter, 31: Ring counter.

Claims (1)

[Claims for Utility Model Registration] A fluorescent display tube in which 60 rod-shaped display elements are provided radially at equal angular intervals over 360 degrees, and a 1-second signal is divided by at least a second counter, a minute counter, and an hour counter. , the second counter counts clocks with a period of 1 second, the minute counter counts clocks with a period of 1 minute, and the hour counter counts clocks with a period of 1 minute.
A clock with a period of 2 minutes is counted, and the contents of these counters are decoded in a time-divisional manner as a second signal, a minute signal, and an hour signal, respectively, and supplied to the fluorescent display tube, and the hour signal is decoded and displayed on the above display. Select one of the elements and display it as a short hand, decode the above minute signal and display one of the display elements.
In an analog display electronic watch that selects a book and displays it as a long hand that is longer than the hour hand, and displays the hours and minutes in a time-division manner, the rod-shaped display element forms an anode on the substrate. A disc-shaped inner grid electrode, which is configured by forming a light-emitting layer and whose rod-shaped display element is centered at S, is disposed opposite to these rod-shaped display elements, and is adjacent to the outer periphery of the inner grid electrode. A ring-shaped outer grid electrode is disposed to face the bar-shaped display element, and a cathode is arranged to face the bar-shaped display element via the inner grid electrode and the outer grid electrode, and a second display signal; A switching display signal generator is provided which sequentially and repeatedly generates a minute display signal and an hour display signal, and is controlled by the second display signal to decode the second signal and select one of the display elements to generate the minute display signal. The minute signal is decoded under the control of the hour display signal, and the hour signal is decoded under the control of the hour display signal, and a display voltage is applied to the inner grid electrode when the minute display signal and the hour display signal are generated. When the second display signal is generated, its application is stopped, and when the minute display signal and second display signal are generated, the display voltage is applied to the outer grid electrode, but when the hour display signal is generated, the application is stopped, and the display voltage is An analog display type electronic timepiece configured such that the rod-shaped display element emits light only in a portion corresponding to an applied grid.