JPS5836898B2 - calendar display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a calendar display device for displaying one month using an electro-optical material.

In recent years, display devices using electro-optical materials, mainly liquid crystals, have been developed and are widely used as displays in devices such as watches and calculators.

In display devices using such electro-optical materials, hours, minutes, seconds, etc. are displayed using a segment display method in which the numbers are divided into 7 to 8 segments.

- When displaying the month on the entire display device, the number of days in each month is different, and the day of the week for the first day is different, so in order to completely display one month, it is necessary to number of segments is required.

Therefore, the number of days in each month is displayed as 31 days.
A method was used to display a month by displaying a specific day of the week (mostly Sundays) above the first day of the date (Sunday), so that it could be displayed in advance without any modification. .

This method has drawbacks such as being difficult to see and understand because it is different from conventional calendar displays.

SUMMARY OF THE INVENTION An object of the present invention is to provide a calendar display device that eliminates the above-mentioned drawbacks and can perform a calendar display that is completely similar to the conventional calendar display.

Next, details of the present invention will be explained based on the drawings.

FIG. 1 is a sectional view showing an embodiment of a calendar display device according to the present invention.

Five transparent substrates 111, 112, 113, 114, 11
Transparent electrodes 211, 212, 22 on each opposing surface of 5
1 to 224, 231 to 234, and 241 to 244, these electrodes are used as electrodes for displaying the date of one month, a liquid crystal 4 is interposed between the electrodes via a spacer 3, and polarizing plates 5, 6 on both sides and a diffuser plate 7 on one side, a reflective calendar display device can be obtained.

A direction opposite to the direction of the diffuser plate 7 is called the front.

In this example, the electro-optical material is limited to liquid crystal, but
It can be used for all electro-optical materials such as transparent ferroelectric ceramics such as PLZT and electrochromic element materials.

The liquid crystal can be used in either FE mode, DS mode, or DS mode.

FIGS. 2 and 3 are plan views showing the electrode structure on both sides of the first liquid crystal layer 41 from the front.

FIG. 2 shows a transparent substrate 111 seen from the front, on which a transparent electrode 211 and terminal electrodes 811 to 831 for connecting other electrodes and circuits can be provided.

The electrode structure of the other transparent electrode 212 of the liquid crystal layer 41 or as shown in FIG. , 30th, and 31st can be divided into transparent electrodes 2122, 2123, and 2124 so that they can be displayed separately.

Transparent electrodes 2121 and 21 22, 21 23.21
24 is a transparent substrate 11 using conductive adhesive or the like.
1 terminal electrode 81 9, 828, 829, 830.

FIGS. 4 and 5 are plan views showing the electrode arrangement on both sides of the second liquid crystal layer 42 from the front.

The upper electrode of the second liquid crystal layer 42 when viewed from the front is provided at the lower part of the transparent substrate 112, and among the transparent electrodes that display the dates of the month, the transparent electrodes 2211 from the 1st to the 28th are provided.
Transparent electrodes 2212, 2213, and 2214 can be provided separately so that the 29th, 30th, and 31st days can be displayed separately.

Further, the position of the calendar display for the first day can be changed from the position of the calendar display for the first day on the first liquid crystal layer.

That is, if a day starts from Sunday in the first liquid crystal layer, one display in the second liquid crystal layer can start the day from Saturday.

As shown in this embodiment, the same liquid crystal layer can also display the past few months.

(Of course you can do it for multiple months more than this.

) In order to perform display for two months, transparent electrodes 223 and transparent electrodes 221 for another month can be provided on the transparent substrate 112 alternately.

The transparent electrode 2211 can be connected to the terminal electrode 825 using a conductive adhesive or the like.

Similarly, transparent electrodes 2212, 2213, 2214.223
can be connected to terminal electrodes 832, 817, 818, and 816, respectively.

In the lower part of the second liquid crystal layer 42, electrodes as shown in FIG. 5 can be formed on a transparent substrate 113.

A transparent electrode 222 can be provided for the transparent electrode 221 that displays the upper month.

A transparent electrode 224 can be provided for the other transparent electrode 223 that displays one month, and the transparent electrode 224 includes transparent electrodes 2241, 2242,
2243, 2244 (can be divided into 2243, 2244).

In addition, transparent electrodes 2241, 2242, 2243, 224
4.222 are terminal electrodes, 824, 828, 82 respectively
9,818,814.

In exactly the same way, the electrodes shown in FIGS. 6 and 7 can be constructed in the third liquid crystal layer 43 when viewed from the front.

Transparent electrode 2341. 2342.2343,2344,
2311, 2312, 2313, 2314.2315 and 232. 233 are terminal electrodes 822 and 828, respectively.
,829,830 ,823,828,829,830
, 823, 828, 829, 830, 826, and 812, 813.

Transparent electrodes 241 and 24 are arranged on the fourth liquid crystal layer 44 in a bolt-like manner.
2,243,244 can be provided as electrodes for displaying a calendar for two months.

In this embodiment, each liquid crystal layer displays a calendar for two months, and four liquid crystal layers are used to display all calendars, but one liquid crystal layer displays a calendar for more than three months. It is also possible to reduce the number of liquid crystal layers by doing this.

Furthermore, display electrodes for one month can be provided in one liquid crystal layer, and seven liquid crystal layers can be used to display all calendars.

When displaying each month, the day of the week on the first day of the month is determined from the last day of the previous month. For example, in the case of August 1979, the first day is Wednesday, so in this embodiment, the day of the week shown in FIG. An electric field may be applied between the transparent electrode 234 of FIG. 8 and the transparent electrode 233 of FIG.

Also, since August is the dog month, an electric field is applied to all the divided transparent electrodes until the 31st.

An example of this display is shown in FIG.

It is also possible to reduce the number of electrodes by displaying all days up to the 31st, regardless of dog month or small month.

It is also possible to make one electrode common to all the liquid crystal layers.

In this case, if the dog month and small month are to be distinguished, the divided electrodes from the 29th to the 31st must be divided into all the electrodes for each month.

That is, separate terminal electrodes are required for both the divided electrodes from the 29th to the 31st of the month starting from Sunday and the divided electrodes from the 29th to 31st of the month starting from Monday.

With the divided electrodes, 3×7=21 terminal electrodes are required.

By providing separate terminal electrodes for electrodes with no characters written on them as in this example, the number of terminal electrodes made by these terminal electrodes is 7.
However, since the divided electrodes from the 29th to the 31st can be connected to each other, only three terminal electrodes are required, and the number of terminal electrodes can be reduced by 22-10=12 terminal electrodes.

A block diagram of a timepiece using the calendar display device of the present invention is shown in FIG.

A signal from an oscillation circuit 10 is passed through a predetermined time signal by a frequency dividing circuit 11 to a drive circuit 12 to display time information on a display device 16.

If necessary, the frequency is further divided by the frequency dividing circuit 13, and time information such as year and month is displayed on the display device 17 through the drive circuit 12.

The dates of one month of the month are displayed on the calendar display device 18 through the discrimination circuit 14 which discriminates the year and month information.

An external view of the wristwatch is shown in No. 10.

The calendar display device according to the present invention can be applied to electrochromic materials, etc., without using liquid crystal as the electro-optical material.

Since electrochromic materials have memory properties, they are effective as display materials in the present invention.

For months that start on Fridays or Saturdays, the five stages of Karenoda do not fit all of them, so the 30th or 31st, which cannot be included, is placed in the topmost day and Monday, but six stages are created and the 6th stage is the 30th or 31st. It is also possible to provide 30 or 31 days.

When using a TN1 type field effect liquid crystal, the polarizing plate for the Sunday portion may be red, and the Saturday portion may be a blue polarizing plate.

A filter can also be provided in the DS mode liquid crystal.

In addition, when using electrochromic wood, Sunday
It is also possible to use an electrochromic material with a red or other colored effect on at least one side of the body.

As described above, according to the present invention, it is possible to provide a calendar display device that has an extremely small number of electrodes and can be used in exactly the same way as a general calendar.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a calendar display device according to the present invention, FIG. Figure 3 is a plan view showing the structure of the transparent electrode at the bottom of the first liquid crystal layer;
FIG. 4 is a plan view showing the structure of the transparent electrode at the top of the second liquid crystal layer, FIG. 5 is a plan view showing the structure of the transparent electrode at the bottom of the second liquid crystal layer, and FIG. FIG. 7 is a plan view showing the structure of the transparent electrode at the top of the third liquid crystal layer, FIG. 7 is a plan view showing the structure of the transparent electrode at the bottom of the third liquid crystal layer, and FIG. FIG. 9 is a block diagram of a timepiece using a calendar display device according to the present invention, and FIG. 10 is a plan view of the timepiece. 111, 112, 113, 114, 115...
Transparent substrate, 211, 212, 221 to 224, 231
~234,241~244...Transparent electrode, 3.
...Spacer, 41, 42, 43, 44...
...Liquid crystal layer, 5, 6...Polarizing plate, 7...
・Diffusion plate, 811-831...Terminal electrode, 10
...Oscillation circuit, 11, 13... Frequency dividing circuit, 12... Drive circuit, 14... Discrimination circuit, 16.17...・Display device, 18...
...Calendar display device.

Claims (1)

[Scope of Claims] 1. In a stacked display device C in which a plurality of display cells with an electro-optic substance interposed between the electrodes are stacked, at least seven sets of moons having different positions on the first day of the month are provided. Two sets of electrodes for calendar display are provided in each of the display cells, and one set of electrodes for each month display is provided for each display cell.
-28 days are used as electrodes to display simultaneously, 29 days, 30 days,
A KARENODA display device characterized in that each electrode for displaying the 31st day is one separate electrode. 2. Claims characterized in that a color polarizing plate or filter is provided on the days of the week such as Saturday and Sunday so that at least one of Saturday and Sunday is displayed in a different color from the other days of the week. The calendar display device according to item 1.