JPS6045387B2 - Digital display clock display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device for a digital display clock that effectively displays not only time but also calendar information.

For example, various types of watches that display the time in digital numbers using liquid crystals, LEDs, etc. have been developed and put into practical use. In such a digital display type watch, the numerical display section for time display is used to display the "month" and "day".
Date information such as time information ↓i, Cao M Pass 1 -4-4-11
4 days. Therefore, by using such a clock, it becomes possible to effectively read not only the time but also the current date information.

However, in order to plan dates or confirm past dates in various normal business operations, it is strongly necessary to look at the calendar table for each month, not just the current date. requested. This calendar table specifies the relationship between the date and the day of the week for each year and month. For example, it is possible to specify the column ``Sunday'' and control the display using an electronic circuit for counting the day of the week, date, and month information as appropriate. However, in order to display a calendar table in addition to a digital time display, the clock display must be made larger, and the space for displaying the time is particularly constrained. It is difficult to implement this in a miniaturized watch.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a display device for a digital display clock that can effectively display a calendar table and display the time in a shared space. It is something to do.

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

Figure 1 is for explaining the configuration of the display screen.
Seven display elements 11a, 11b, etc. each consisting of numerical values from date display electrodes 1" to 3U are arranged horizontally in sequence to correspond to each day of the week from "Sunday" to "Saturday". The date display section 11 for one month is set by arranging the calendar table in the order of the 7th day of the week. In addition, it consists of 7 segment electrodes arranged in a 4-digit Japanese-shape to display the time in minutes. A colon 16 separating "minute" and "minute" is set and arranged so as to overlap the date display section 11. In this case, the above numerical values 12 to 15 correspond to the plurality of segment electrodes 12a, 12b, 13a, 13, respectively.
b..., 14a, 14b..., 15a, 1
The segment electrodes 12a, 12b to 15a, 15b, .
A display, which is a date numerical display electrode, is arranged and set between each column, between each row, etc. of the arranged display bodies 11a, 11b, etc., and is inside and outside of the 7-segment electrodes of numerical values 13, 14, and 15. The display bodies 11a, 11b, . . . are now located, and the display bodies 11a, 11b, .
11b, . . . are electrically connected via lead electrodes formed between the segment electrodes, as shown in FIG. Furthermore, above the rows corresponding to each of the seven days of the day in the date display section 11, for example, arrow-shaped indicator indicators 17a to 17g are disposed, and the indicator indicators 17
Above each of a to 17g are "0", "10", "
20"......Second display 18 with numerical values of "50"
A to 18f and a time auxiliary display section 18 consisting of a "PM" display 18g for determining morning and afternoon;
``u'', ``MO'', ``SA'', etc. A day of the week display section 19 with character display bodies 19a to 19g is arranged.

By specifying display on the indicator display bodies 17a to 17g, it is possible to display seconds in units of 10 seconds, specify AM or PM, and specify display of the day of the week. Here, a date display section 11, a numerical display section 12 for displaying the time,
15, a time auxiliary display section 18, a day of the week display section 19, etc., are constructed of, for example, a liquid crystal display device.

That is, a display body 11 as shown in the figure is provided on the inner surface of the upper transparent substrate of a pair of transparent substrates facing each other via a liquid crystal layer.
a, 11b..., segment electrodes 12a to 15
a, 15b1 colon 16, display body 18a, 18b...
, 19a, 19b, . . . are formed, and a transparent common electrode is formed on the inner surface of the substrate facing these electrodes. The liquid crystal molecules interposed between the two substrates are arranged in a helical structure twisted approximately 90 degrees between the two substrates. Then, by applying an electric field between the selected electrodes, the helical structure of the liquid crystal molecules collapses, optical rotation is lost, and the light is blocked by a polarizing plate (not shown) to correspond to the selected electrodes. The characters, numbers, etc. that are displayed are displayed. That is, in the state where the time is normally displayed, the display operation of the date display section 11 and the day of the week display section 19 is cut off, and as shown in FIG. Display section 18
Depending on the time, in the case of a diagram, "AM 1ctf function 20 seconds range" is displayed.

In addition, if the day of the week display section 19 is used instead of the auxiliary display section 18 as shown in Fig. 3, and the numbers 12 to 15 are used to display the "month" and "day", the date including the day of the week can be displayed. is “2
"Thursday, August 8th" will be displayed, and this can be switched between the time display and the above-mentioned time display by inputting, for example, a button on the old display. Furthermore, if only the date display section 11 and the indicator displays 17a to 17g are used as shown in FIG. 4A, a calendar table can be displayed instead of the time and specific date display. , a column for a specific day of the week, for example Sunday, in the calendar table can be specified using the indicator displays 17a to 17g.

At this time, as shown in FIG. 4B, the corresponding "month" of the calendar table can also be displayed using the time display section. In the case of this calendar display, the number of days in the month differs depending on the major month, minor month, February, etc., and the display bodies 11a, 11b, etc. of "1" to "31" are always displayed. If you just display it, it won't match the actual situation.

Therefore, as shown in FIG. 5, a common display drive signal is applied from the terminal 20a to the display bodies 11a, 11b, . ”, “
Display drive signals are applied to the display bodies 11X, 11Y, and 11Z of 31'' from terminals 20b, 20c, and 20d, respectively, and signals from the unadjusted logic circuit 21 are applied to these terminals 20a to 20d. Distribute and supply. This logic circuit 21 is an AND circuit in which respective discrimination signals for a large month, a small month, February of a leap year, and February of a normal year are combined from a large/small month discrimination circuit 22 controlled by a clock section to be described later. 23
a, 23b, 23c, 23d1 and AND circuit 23a
OR circuit 24a1 to which the output signal from ~23d is supplied
An OR circuit 24b1 to which the outputs of the AND circuits 23a to 23c are combined; and an OR circuit 24c to which the outputs of the AND circuits 23a and 23b are combined;
c output and AND circuit 23a output terminal 20a~
20d. And the AND circuit 23a
-23d, a gate signal is given by a calendar display command. That is, when a calendar display command is given when the discrimination circuit 22 obtains an output for determining a large month, an output signal is obtained from the AND circuit 23a, and all of the terminals 20a to 20b are output together with the outputs of the OR circuits 24a to 24c. A display drive signal is applied to the display drive signal, and all calendar tables "1" to "31" are displayed.

Similarly, depending on the state of the discrimination output of the discrimination circuit 22, "28
'', up to ``29'', up to ``30'', etc., and a calendar table with unadjusted months is controlled to be displayed.
FIG. 6 shows a clock display section of a timepiece equipped with the display device as described above.
A clock clock signal of 1 pulse per second (1P/10 seconds) is formed.

This timing clock signal is supplied as a step signal to a hexadecimal "second" counting circuit 27. This counting circuit 27 generates a "second" timing signal of 2 units per square, and further every minute. A carry signal is generated to count and drive the (1) decimal "minute" counting circuit 28. This counting circuit 28 generates a "minute" clock signal in units of 1 minute, and generates a carry signal every 6 minutes, that is, every hour to drive the 12-decimal "hour" counting circuit 29. ” to generate a clock signal. The time signals of "seconds", "minutes", and "hours" from these counting circuits 27, 28, and 29 are supplied to the switching control section 30, and in normal times when there is no switching command from the switching section 31, This clock signal is supplied to the decoder 32, which controls the driver 33 to display the time as shown in FIG. 2 on the display device 34 as described above. In this case, by counting the carry signal obtained every full period from the "hour" counting circuit 29 in the binary counting circuit 35, a daily signal is obtained, and according to the counting contents of the counting circuit 35, A morning/afternoon discrimination signal is obtained, and this discrimination signal is supplied to the switching control section 30.

Then, when displaying the above-mentioned time, the display control of the instruction display element 17g is performed to instruct whether the time displayed at that time is AM or PM. The carry signal from the binary counting circuit 35 is used as a "day" counting signal, and the "day" counting signal is obtained by counting and driving the 31-decimal "day" counting circuit 36. Also, by counting and driving the septadecimal "day of day" counting circuit 37, a "day of the month" count signal can be obtained.

A decimal "month" counting circuit 38 is provided corresponding to the "day" counting circuit 36. The count value of this "month" counting circuit 38 is used as "month" display information and is monitored by a month control circuit 39. This month control circuit 39 uses the value counted by the "month" counting circuit 38 to determine the last day "311".
The large moon of “B”, the small moon of “30 days”, and the “2
8th” in February, “29th” in February in a leap year, and “Sun”
In comparison with the date counted by the counting circuit 36, a reset command is given to the "day" counting circuit 36, and a reset command is sent to the "month" counting circuit 38.
A step command is given to the ``month'' and ``day'' counting control, which is controlled at the end of the month. Then, [mouth j counting circuit 36, "day of the month" counting circuit 37, and "month" counting circuit 3
8 count information is led to the switching control section 30, and the switch section 31 displays the date table. When the display command is issued, the date display information is selected and guided to the decoder 32, and displayed on the display device 34.
For example, the date is displayed as shown in FIG. In addition, in the month control circuit 39, in conjunction with the month-end control, "29", "30", "
31" includes the function of the circuit explained in FIG.
It gives a command to the switching control section 30 and also controls the count value of the day of the week standard counter 40.

This force counter 40 counts and stores the column position of, for example, "Sunday" when the calendar is displayed, and corrects the counted value in accordance with the conversion of "month", and corrects the counted value in response to the conversion of "month".
A selection display command for 17g is generated, and the switching control unit 30
supply to. When a calendar display command is generated by the switch section 31, the switching control section 30 gives a display command for the date display section 11 to the decoder 32, and also sends signals from the month control circuit 39 and the day of the week reference counter 40 to the decoder 32. 32 to produce a rendered display as shown in FIG. 4A. In this case, if the information from the "month" counting circuit 38 is also used at the same time, a display like B in FIG. 4 will be shown. FIG. 7 shows a part related to the month control circuit 39, which includes a large month/small month discrimination circuit 22 that detects the counting information of the "month" counting circuit 38. The output signals for determining the large month, small month, and February are supplied to AND circuits 41a, 41b, and 41c, respectively, and the output signals for determining the large month, small month, and February are supplied to AND circuits 41a, 41b, and 41c, respectively.
As shown in FIG. 5, the signal is used as a display control signal for the displays 11X, 11Y, and 11Z of "30", that is, as a monthly unadjusted signal.

Also, from the "day" counting circuit 36, "28", "29",
When the next step is taken from the date counting state of "30" and "31", the output signals are respectively taken out, and this "28"
”, “29”, and “30” are supplied to AND circuits 42c, 42b, and 42a.

The output signals from the AND circuits 42a to 42c are supplied to the OR circuit 43 together with the signal corresponding to the month of March.
The negative output signal from the OR circuit 43 is supplied as a gate signal to the AND circuits 41a to 41c, and is also supplied as a reset command to the "day" counting circuit 36.
The output signal from each of the AND circuits 41a to 41c is supplied to the month counting circuit 38 as a step command. For the day standard counter 40, "+4" and "
It is supplied as a count correction command of "+5" and "+6". The small month discrimination signal from the discrimination circuit 22 is coupled to the AND circuit 42a, and the AND circuits 42b and 42
The "February" discrimination signal from the discrimination circuit 22 is coupled to each of the terminals c.

Furthermore, in the calendar display, control related to the leap year that occurs once every four years is also required, and therefore, a leap year command signal is coupled to the leap year.

This leap year command signal is obtained, for example, by counting four carry signals for each year obtained from the "month" counting circuit 38. The leap year command signal obtained in this way is
A gate signal is given to the AND circuit 42c via the inverter 44, and is coupled to the AND circuits 41c and 45 as a gate signal.The AND circuit 45 is supplied with the "February" discrimination signal from the discrimination circuit 22, It is used as a signal to specify February of the year for month unadjusted control of calendar display. That is, in the month control circuit 39, assuming that the current month is October, for example, a gate signal is given from the discrimination circuit 22 to the AND circuit 41a.

In this state, the "day" counting circuit 36 counts "31 days", and when the next step command is coupled, an output signal corresponding to "31" is generated, and a signal is emitted from the OR circuit 43. , a command is coupled to the day of the week reference counter 40 from the AND circuit 41a to "+4". At the same time, a reset command is issued to the "day" counting circuit 36 to set the date count to "1" and an increment command is given to the "month" counting circuit 38 to set the month count to "November". Therefore, the indications on the indication bodies 17a to 17g of the display device are shifted by four positions to point to, for example, the column of ``Sunday'' in the calendar of ``November''. In this way, when the "month" counting circuit 38 starts counting "November", the discrimination circuit 22 generates a small month discrimination output,
A gate signal is now given to AND circuits 41b and 42a.

In this state, the count of the "day" counting circuit 36 progresses to "30".
When an output signal is obtained from the AND circuit 42a, an output signal is obtained from the OR circuit 43, and the "day" counting circuit 36 is reset.
The month" counting circuit 38 is incremented to convert to the date counting state of "December 1st." At the same time, an output signal is generated from the AND circuit 41b, and the day of the week reference counter 40 is controlled by "+5".
Enables the specified display of the "Sunday" column in the calendar table. Next, assuming the case of "February", in a normal year, the last day is "28th", and the column of "Sunday" in the calendar table of "February" and the calendar table of the next "March" This is the same as the "Sunday" column in .

Therefore, in this normal year, the output of the inverter 44 is "1", so when the "day" counting circuit 36 generates an output of "28", an output is obtained from the AND circuit 42c,
The "day" counting circuit 36 is reset by the output of the OR circuit 43,
Step the "month" counting circuit 38 and count the date to "March 1st"
Therefore, the count value of the day of the week reference counter 40 is not changed. Furthermore, in the case of "February" in a leap year, since there is a leap year command signal, an output of "29" is generated from the "day" counting circuit 36, and an output signal is obtained from the AND circuit 42b. The date count will be converted from "February 29th" to "March 1st".

At the same time, since the AND circuit 41c is connected to the "February" discrimination signal and the gate signal from the leap year command signal, the day of the week reference counter 40 is incremented by "+6" along with the output from the AND circuit 42b, and the leap year Instruction control for the "Sunday" column in the calendar table for "March" is now performed. FIG. 8 shows in more detail the parts related to the switching control section 30 shown in FIG.
AND circuits 46, 47, 48, counting circuit 37, which are connected to the time measurement signals in units of "1 hit 2", "minute", and "hour" from
AND circuits 49, 50, 51 to which the counting signals of "day, day, month" from 36, 38 are combined, and further counting circuit 3.
AND circuit 52 to which the "PM" instruction signals from 5 are combined.
, is provided with an AND circuit 54 to which a monthly unadjusted signal obtained from the month control circuit 39 is coupled to an AND circuit 53 to which the counting signal from the day of the week reference counter 40 is coupled, by means as shown in FIG.

Also, a switch section 3 that gives commands to this switching control section 30
1 consists of switches Sl and S2 that generate a logic "1" signal that is turned on when the switch is turned on. When the switch is turned on, the signal is sent to lines Ll and L2, and when it is not turned on, the signal is sent to lines L3 and L4 by inverters 52 and 56. A signal is generated for each. The signal on the line L1 from the switch section 31 is sent to AND circuits 49, 50, 51, the signal on the line is sent to AND circuits 53, 54, and the signal on line L3 is sent to AND circuits 46, 47, 48 and 52, 53. , line L
The signals No. 4 are supplied to AND circuits 46 to 52, respectively.

That is, in a steady state as shown in the figure in which the switches Sl and S2 are both open, the gates of the AND circuits 46 to 48 and 52 are opened to display "10 seconds", "minutes", "hours", and PM" information is selected and only the switch S1 is turned on, the gates of AND circuits 49 to 51 are opened, date display information of "Yoday" and "Sunday "Month" is selected, and the switch S2 is turned on. When only the signal is turned on, the gates of AND circuits 53 and 54 are opened, and the month unadjusted signal and day of the week reference signal for calendar display are selected. The output signals from the AND circuits 46, 49, 53 are sent to an OR circuit 57, and the output signals from the AND circuits 47, 50 are sent to an OR circuit 58.
Furthermore, the output signals of AND circuits 48 and 51 are coupled to OR circuit 59, and the output signals from OR circuits 57-59 are supplied to decoders 32a-32c. Further, the output signal from the AND circuit 54 is supplied to the decoder 32d. Here, the decoder 32a detects the seven indication indicators 1 of the display device.
The decoder 32b obtains a display signal for selectively displaying 7a to 17g.
5 display section, the decoder 32c displays the numerical value 12 in the unit of "hour",
The display unit 13 and the decoder 32d obtain display signals for the numerical display unit 11 based on a calendar display, and control the corresponding drivers 33a to 33d, respectively.
There is something to control the display drive. Further, as explained in FIG. 1, the display device 34 has seven display bodies 1.
It is provided with an auxiliary display section 18 and a day of the week display section 19 for giving auxiliary instructions on the display contents of 7a to 17g. As shown in FIGS. 2 to 4, both display portions 1-8 and 19 are
It is used as appropriate depending on the display mode, and is performed by the display control switch section 31. That is, the AND circuit 60 detects the outputs of the inverters 55 and 56,
A signal is taken out during normal operation when both switches Sl and S2 are not operated. This signal is supplied to the OR circuit 61 together with the signal on the line L2, and this OR circuit 61 issues a non-display command to the day of the week display section 19 in the upper stage, and the display control section 6
Supply to 2. Also, the OR circuit 63 detects the signals from the lines Ll and FL when the switches Sl and S2 are turned on, and issues a non-display command to the auxiliary display section 18 in the lower stage and supplies it to the display control section 62. OR circuit 61 at 62
, 63, the display section 18 of the display device 34
, 19 are displayed. That is, when the switches Sl and S2 are open, the auxiliary display section 18 is displayed as shown in FIG. 2, and when only the switch S1 is turned on, the day of the week display section 19 is displayed as shown in FIG. When only the display is turned on, both display sections 18 and 19 are set to a non-display state as shown in A and B in FIG. 4.

That is, in the timepiece configured as described above, during normal operation when the switches Sl and S2 are not operated in the switch unit 31, the AND circuits 46 to 48 and 52
The gates of ``Hour'', ``Minute'', ``1 [Phase]'', ``
PM" clock signal, the time is displayed as shown in FIG.

Furthermore, when only switch S1 is turned on, the date is displayed using the numerical segment of the time display as shown in Figure 3, and by further operating only switch S2, the numerical values 12 to 15 are displayed. Instead, a rendered display as shown in FIG. 4 in the form of a calendar is displayed. In this case, numerical time and date display,
The calendar table is displayed in the same display range of the display device 34.

However, as described above, the segment electrodes forming the numerical values 12 to 15 are
, 11b, . . ., all of the display element segments can be effectively arranged using one set of liquid crystal display bodies. As described above, according to the display device of the present invention, by effectively utilizing the limited area of the display section, in addition to the normal time display, the calendar display can be used effectively for checking dates, etc. is selected and displayed, and can be used effectively in combination with the date display as appropriate.

In particular, this display device exhibits great effects when applied to miniaturized timepieces such as wristwatches. In the examples, a case where a liquid crystal is used as the display means is shown, but it goes without saying that this can also be carried out in the same way using a display means such as LED electrophoresis or electrochromism that can perform similar display control. be.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating a display device according to an embodiment of the present invention, FIGS. 2 to 4 are diagrams each showing display modes of the display device, and FIG. 5 is a display of a calendar table of the display device. 6 is a diagram illustrating the timekeeping circuit configuration of only a watch equipped with the above-mentioned display device. FIGS. 7 and 8 are diagrams illustrating the timekeeping circuit configuration, particularly the month control section and switching in the calendar table. It is a figure explaining the example of a control part. 11... Funeral display section, 11a, 11b...
・Display body, 12-15...Numeric value, 17a-17g
...Instruction display body, 18...Auxiliary display section, 19...Day of the week display section, 22...Large month, small month discrimination circuit, 27 ~27... Counting circuit (for watches), 30... Switching control circuit, 31...
・Switch unit, 34...Display device, 36-38
... Counting circuit (for date), 39 ... Month control circuit, 40 ... Day of the week reference counter.

Claims (1)

[Claims] 1 Segment electrodes for time information display consisting of 7 segment electrodes arranged in a day shape, and segment electrodes "1" to "3" arranged in the order of the 7th day of the calendar to display a calendar table.
1" is a display device for a digital display watch comprising a plurality of numeric date display electrodes formed on the same substrate, wherein the plurality of date numeric display electrodes are formed of seven segments arranged in the Japanese character shape. The date numeric display electrode is arranged inside and outside the 7-segment electrode, and the date numeric display electrode is arranged outside the 7-segment electrode via a lead electrode formed between the 7-segment electrodes. 1. A display device for a digital display timepiece, characterized in that the display device is electrically connected to a date numeric display electrode.