DE2319437A1 - DIGITAL DISPLAYING ELECTRONIC CLOCK - Google Patents

Description

Dipl.-ing. Heinz Lesser, patent attorney D-8 Mönchen 81, Cosimaslra | 81 each Telephone: ((SII) 983820

Kabushiki Kaisha Suwa Seikosha

Tokyo (Japan) L 10.037 / Fl / ho.

April 17th 1973

Digitally displaying electronic clock

The invention relates to a digital display Electronic clock, in particular wristwatch, with one based on a liquid crystal layer, light-emitting diodes Od. Like. Working display device and with switching devices for correcting the individual displays.

Especially when a multitude of different displays, i.e. beyond the seconds, minutes and hours display or the date, day of the week and / or the like. Are displayed, it makes great difficulties that so far for the Correction of these displays to arrange individually assigned switches so that they can be operated; this The problem arises particularly with small clocks such as wristwatches.

With the present invention, a watch is intended to be the initially mentioned type are made available, their display correction even with a large number of display points or the like, more space-saving with simple adjustment is provided.

This is achieved according to the invention by a selector switch for the respective display point to be displayed or the like, and by a setting switch for the continuation of the display of the selected display position, their combined actuation is required for correction.

Dipi.-lng. Heinz Lesser, Polentonwalt D -8 Munich 81, Cosimastroße 81 · Telephone; (0811) 95 38 20

According to the invention are therefore independent of the number of Individual display digits or displays to be set such as date, day of the week and / or year, only two in total Switch required; these can be provided in such a way that they are convenient and error-free, even with small watch dimensions are to be operated.

In a preferred embodiment, the display point controlled in each case with the aid of the selector switch is identified. This is done in particular by the fact that the playback the display of this display point takes place in a flickering rhythm. The frequency preferably corresponds to Flicker rhythm of those of the switching frequency given with the aid of the setting switch.

The invention is reproduced with reference to the in the drawing Detailed example / explained in more detail. Show it:

Fig. 1 is a schematic view of an embodiment \ an electronic Armbanduhr_.nach of the invention;

Fig. 2 is a block circuit diagram of an embodiment a circuit arrangement of the clock according to FIG. 1;

3 shows an exemplary embodiment of a control circuit block as a detail according to FIG. 2;

FIG. 4 shows a time diagram to illustrate the mode of operation of the control circuit block according to FIG. 3.

Fig. 1 is a schematic view showing an embodiment of a wrist watch with a liquid crystal display according to the invention. As can be seen from Fig. 1, that Date, day, hour, minute and second “SA” is one of the two pushbuttons on the front of the housing Correction switch assigned to correct the display, while "SS" is a selection switch for selecting a

3098U / 092

Üip! - Ing. Heinz Lesser, patent attorney D -8 Munich 81, Cosimastraße 81 · Telephone: (0811) 95 38

agreed in each case is assigned to the notification point to be corrected.

A crown is connected to a safety switch "S" on the side of the case. When the crown is inside " is pushed, the safety circuit is actuated and the pushbuttons cannot trigger any effect, even if they are pressed. In order to be able to operate the pushbuttons, the safety circuit must be released by pressing the Crown is pulled.

Fig. 2 is a block diagram showing a circuit construction 1. 1 to 6 form a group of counters. 1 is an oscillator and divider circuit block, where exactly one 1-second signal " is formed by counting the stable frequency of a '~ - Crystal oscillator "X" (e.g. 16,384 Hz). 2 denotes a counter block that forms a 1-minute signal, by dividing the second signal from 1 into 1/60. 3 forms a 1-hour signal by dividing the minute signal from 2 to 1/60. 4 forms a 1-day signal by dividing the hour signal from 3 into 1/24. 5 shares the daily signal of 4 in 1/31. 6 divides the daytime signal from 4 to 1/7.

7,8,9,10 and 11 form a group of decoders which convert BCD code signals from the aforementioned group of counters into signals for displaying a second, a minute, an hour, a date or a day. Furthermore, show ¹¹ L ₃ "," L _M "," L ₁₁ ", ¹¹ L ₀ " and "L _W ^M liquid crystal display elements (for example) with which a second, a minute, an hour, a date or a Day can be displayed.

Each of the inputs "S _b ", ^M M _b ", ¹¹ Hj ₃ ", "D _b ⁿ , and" Wj ₃ ¹¹ is connected to an input of a respective NAND gate circuit for driving the liquid crystal display element. The entrances are in the normal state

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2319432.

Dipl.-Ing. Heinz Lesser, patent attorney D - 8 Munich 81, Cosimastroße 81-- Telephone: (0811; 9ί>2-Λ; ύ

"S _b " , "M _b ", "H _b ", "D _b " and ¹¹ Wj ₅ "at a high voltage level (" 1 "signal), the liquid crystal display elements are therefore normally driven by the output DEC of the respective assigned decoder. 12 is a control circuit block. If a number display from the switch "S" is to be corrected to select a desired number, for example the number for one minute, the signal "P" of low frequency (20 H ζ ** a few Hz) of the counter 1 is connected to "M , ". Accordingly, the display element '"I» .- ¹¹ to display the minutes is switched according to the frequency "F". Since the frequency "F" is within the ability of the eye to resolve, the display flickers and can thus be easily distinguished from the other display elements. which are constantly visible and displayed. At the same time , the signal of the correction switch "S_" is connected to

χ *

"M," and thus the correction input ADJ of the associated

a ■ .

Transmitted to the counter . "SV is a safety switch to make the aforementioned function possible or impossible. Fig. 3 is a circuit diagram and Pig. 4 is a control diagram for the inputs and outputs, which explain the circuit arrangement 12 in more detail.

- ¹¹ PP ₁ ", - ¹¹ PF ₂ " and ¹¹ FP ₃ "are D-type flip-flops and form a hexadic" Johnson ¹¹ counter which is operated using the S "switch. In the operating state, when the crown is pushed in by the safety switch S ^, there is an electrical plus potential at the reset input ¹¹ R ". The NAND gates" G ₁ "to" G ₁₀ "are thereby closed. And also when the push button is pressed and If the switches "S '· and * S" are switched, the function can be carried out. If the crown is pulled out and an electrical minus potential is supplied to the reset "R", the circuit can be actuated. Corresponds to the selector button ^M S _S ^M the same name in Fig. 3, the time display correction signal ^H S _A "the terminals ^M S _b "

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Dipl.-Ing. Heinz Lesser, patent attorney D - 8 Munich 81, Cosimostcoß «11 · Telephone; (0811) f & 3 *

and "S" transmitted. Furthermore, the repeated actuation of the push button "S ₃ ' ¹ leads to the fact that the gates" G ₉ ' ¹ and "G ₁₀ " are opened, whereby a certain desired minute display can be set. The other numbers for the hour display, the date and the day can also be set, the work cycle is repeated accordingly.

Fig. 4 shows a timing diagram for the seconds display, the hour display and the clock pulse "F". The actuation time of ¹¹ S- " specifies the time during which a correction is possible at all. With the switch ¹¹ S ₅ ", the seconds display is first activated, which is then switched on by pressing "S" at the same time. Then press "Sg" twice to switch to the hour display.

So far, the correction switches were provided individually, or a display element for displaying the respective display point to be corrected was provided separately. However, with such known methods, it is impossible to provide a compact wristwatch which various displays, such as the display of month and year and / or a stopwatch device and houses an alarm facility.

On the contrary, the invention opens up a great deal Circle of activity and application, if they are in the case of a watch is applied with various bodies.

An example is an antrids process with direct current

has been described with a liquid crystal display. However, it is also possible to specify a number to be corrected by changing the drive frequency in two steps according to the drive method with alternating current, namely 32 Hz and 8 Hz.

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ORIGINAL tNSE * ECTSD

Claims (5)

Dipi.-lng. Heinx Lesser, Potentcinwolt D - · 8 Munich 81, Cosimosttoße 81 "· Telephone: (OB11) S5 3ί? C PATENT CLAIMS Digitally displaying electronic clock, in particular wristwatch, with one based on a liquid crystal Layer, light-emitting diodes or the like. Based display device and with switching devices .for correction of the individual advertisements, characterized by a _{selector switch (S g} ) for the respective display point to be displayed or the like and by a setting switch (Sj.) for the further display of the respectively selected display point, the combined actuation of which is required for correction. 2. clock according to claim 1, * characterized in that the settings for each setting are made using the selection, switch (S-) selected display point is identified. 3. clock according to claim 2, characterized by the fact that to identify the selected display point, the reproduction of their display in one Flicker rhythm takes place. 4. clock according to claim 3, marked by that the flicker rhythm corresponds to the frequency of the ad switching carried out to correct the display »; 5. Clock according to one of the preceding claims, 3G9844 / 0S20 DipL-li. «;. Heir .- 'Le & s. * F, Pcitti.tcinv.-olt Ü —S Munich 81, Coiiimastioiie 31 Telephone: (0811) 95 38 20 characterized in that the selection switch (S _g ) is assigned a flip-flop counter which can be switched further with it. Clock according to one of the preceding claims, characterized in that a safety switch (S _T ) is provided to prevent unintentional operation of the selection switch (S _g ) and / or the setting switch (& _A ). 3098U / Q920