JPH0348613Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a calendar display device that displays a calendar for one month or more using a liquid crystal display or the like. An object of the present invention is to provide a calendar display device that can always display Sunday in either the left or right column when displaying the calendar for each month. Conventional display devices that can display the calendar for January display the dates from the 28th to the 31st in a fixed position, display Sunday in the upper row, and display this in the month. Accordingly, the calendar is displayed by moving seven locations. As is well known, in a normal calendar, Sunday is on the left edge (in Europe and America it is sometimes on the right edge), and even when using a liquid crystal display, it goes without saying that it is easier to recognize if Sunday is on the left edge. However, dividing one day's worth of dates into several segments and displaying them in seven different ways would be extremely difficult, since the number of electrodes would significantly increase when considering 31 days. Therefore, in conventional calendars, the date is fixed and specific days of the week are moved. Furthermore, the following method has also been considered conventionally. The date is displayed in 7 columns, but 6 columns of dates are added as pixels, making it displayed in 13 columns in total. FIG. 1 shows an embodiment of this pixel. If you light up the 7th column from the left end, the 1st day is a Sunday month, and if you light up the 2nd column to the 8th row from the left end, the 1st day is a Saturday month. If you light up columns 13 to 13, the first day of the month will be Monday. According to this method, since 6 out of 13 columns are erased, about half of the display surface becomes blank, resulting in an unbalanced layout, and the effective area also becomes smaller, making it difficult to see. The present invention is a calendar display device that eliminates such drawbacks. This will be described in detail with reference to embodiments and their drawings. Figures 2a and 2b show the electrodes of the embodiment of the present invention, and the parts that will become pixels are indicated by thick lines.
The lead portions are shown by thin lines, a is included in one transparent plate and is called a common electrode group, and b is included in the other transparent plate and is called a divided electrode group. Display is performed by overlapping both electrodes, sandwiching the liquid crystal, and applying an appropriate alternating voltage. In the end, this embodiment displays a calendar for January, and the date electrode group can light up 10 horizontal date columns and 6 vertical date lines classified by day of the week, and the 10 digits of the date. It has an electrode division that allows switching between nothing and 1, 1 and 2, and 2 and 3. In other words, when the 10-digit numerical display of the date is changed and used from the top row to the middle row (abbreviated as case A), and when it is used from the middle row to the bottom row (abbreviated as case B) There is. Furthermore, depending on the day of the week on the first day, 7 out of 10 columns
Select a column and turn it on to display a calendar. FIG. 3 shows a driving signal in an embodiment of the present invention, in which a signal based on a V-2V voltage averaging multiplex signal is used. Common electrodes 11, 12, 13 shown in Figure 2a
are the signals C1, C2, and C2 shown in FIG. 3, respectively.
C3 is normally applied. And in the above case A
In this case, the pixels included in the common electrodes 11 and 12 shown in FIG.
Appropriate signals are respectively applied to the divided electrodes 21 to 33 shown in FIG. In the above-mentioned case A, if the signal SA shown in FIG. 3 is applied to the divided electrode, the column corresponding to the divided electrode is displayed, and if the signal SC is applied, no display is performed. In case B described above, if the signal SB is applied to the divided electrodes, a display is made, and if the signal SC is applied, no display is made. In other words, there are three types of signals, SA, SB, and SC, that are applied to each divided electrode. How to create a signal for each divided electrode will be described later, but in any case, an effective voltage of √(58)0 is applied to the displayed pixels, that is, the lit parts, and display is performed, and the pixels that are not displayed, In other words, the non-lit part has √(18)0
Only the effective voltage of is applied and no display is performed. When applying the present invention, rather than using it as a calendar display alone, it is more useful if it is incorporated into a crystal oscillation type liquid crystal watch to display a calendar in synchronization with the time and date. Since a large number of reference signals are included in the circuit of a liquid crystal watch, it is easy to use drive signals and selection signals. The extraction of the drive signals C1, C2, and C3 applied to the common electrodes described above is a well-known method and will therefore be omitted.
To generate SA, SB, SC), the fourth
A drive circuit as shown in the figure may be used. 41,
42, 43, and 44 are known switch circuits, F and G are reference signals shown in FIG. 3, and H is a selection signal to be described later. A split electrode is connected to OUT, and if H is high level, the column connected to the split electrode is lit, and if H is low level, it is not lit. γ is one of the day of the week signal bits described later. It goes without saying that the number of drive circuits shown in FIG. 4 is the same as the number of divided electrodes. Next, the selection signal H will be explained. The first day of the week in seven different months is represented by 3-bit codes α, β, and γ. Table 1 is a correspondence table between days of the week and 3-bit codes. * in Table 1
Do not use marks. Next, the number of days in the month is 28th, 29th,
Since there are four dates, 30th and 31st, it can be expressed with 2-bit codes δ and ε. Table 2 is a correspondence table between the number of days in the month and the 2-bit code. 3 representing the day of the week
All months can be displayed using a combination of a bit code and a 2-bit code representing the number of days in the month, totaling 5 bits. Since this 5-bit data can be easily obtained using a clock counter or the like, the details will be omitted. These 5-bit data are logically combined for each divided electrode as shown below to create a selection signal H.
The calendar display of the present invention is made possible by supplying power to each drive circuit corresponding to each divided electrode.

【table】

[Table] Specifically, the divided electrode 21 is always displayed, so H=1; the divided electrode 22 is displayed on days other than Wednesday and Saturday, so H=+; and similarly, the divided electrode 23 is H=1. , the divided electrode 24 is H=*
β, divided electrode 25 is H=α*β, divided electrode 26 is H=β, divided electrode 27 is H=α+β, divided electrode 2
8 is H=ε+δ+γ, divided electrode 29 is H=δ+
γ, divided electrode 30 is H=ε*δ+γ, divided electrode 3
1, H=ε+δ for the divided electrode 32, H=ε*δ for the divided electrode 33, and the output thereof can be supplied to H in FIG. FIG. 6a shows an example of the logic circuit of the divided electrode 24, and FIG. 6b shows an example of the logic circuit of the divided electrode 30. Figures a, b, c, d, e, f, and g are specific calendar display examples according to the present invention when the number of days in a month is 31. In Figure 5a, α=β=γ=0,
δ=ε=1. Similarly, in Figure 5b, α=δ=
ε=1, β=γ=0, α=γ=0 in Figure 5c,
β=δ=ε=1, in Figure 5d α=β=δ=ε=
1, γ=0, α=γ=δ=ε=1 in Figure 5e,
β=0, α=0 in Figure 5f, β=γ=δ=ε=
1. In FIG. 5g, α=β=γ=δ=ε=1. As can be seen from FIGS. 5f and 5g, according to the present invention, the 29th, 30th, and 31st at the bottom may be displayed outside the seven day-of-the-week columns. As explained above, according to the present invention, it is possible to display a calendar with Sunday always on the left side with a small number of pixels and a small amount of display movement. The present invention is especially effective when used in combination with a wristwatch.

[Brief explanation of the drawing]

Figure 1 shows a conventional calendar display pixel. Figures 2a and 2b show electrode patterns of embodiments of the present invention. FIG. 3 shows each drive signal of the embodiment of the present invention.
Figure 4 shows the drive circuit for each divided electrode. Figure 5 a, b,
c, d, e, f, and g are calendar display examples according to the present invention. FIGS. 6a and 6b are examples of logic circuits for generating the selection signal H.

Claims (1)

[Scope of Claim for Utility Model Registration] A calendar display device that displays one month's worth of dates by turning on and off liquid crystal pixel groups arranged in 6 rows and 10 columns to display dates, wherein the calendar display device has 3 pixel groups. Following the day space, there is a first line in which pixels are arranged in order from the left that can display only dates from "1" to "7", and a first row that can display only dates from "5" to "10". Following the pixel, there is a pixel that can display the date "11" or "1", a pixel that can display the date "12" or "2", and a pixel that can display the date "13" or "3". A second row in which pixels, pixels capable of displaying the date "14" or "4" are arranged in order from the left, pixels capable of displaying the date "12" or "2", and pixels capable of displaying the date "13" or "2". A pixel that can display the date "3", a pixel that can display the date "14" or "4", a pixel that can display the date "15" or "5", and a pixel that can display the date "16" or "6". A pixel that can display the date "17" or "7", a pixel that can display the date "18" or "8", and a pixel that can display the date "19" or "9". a pixel capable of displaying a date of "20" or "10", and a pixel capable of displaying a date of "21" or "11" arranged in order from the left; A pixel that can display the date "19" or "9", a pixel that can display the date "20" or "10", a pixel that can display the date "21" or "11", and a pixel that can display the date "22". or a pixel capable of displaying the date "12", a pixel capable of displaying the date "23" or "13", a pixel capable of displaying the date "24" or "14", a pixel capable of displaying the date "25" or " A pixel that can display the date "15", a pixel that can display the date "26" or "16", a pixel that can display the date "27" or "17", and a pixel that can display the date "28" or "18". A fourth row in which pixels that can display the date of ``26'' or ``16'' are arranged in order from the left, a pixel that can display the date of ``26'' or ``16'', and a pixel that can display the date of ``27'' or ``17'' , a pixel capable of displaying the date "28" or "18", and a pixel capable of displaying the date "29" or "19",
A pixel capable of displaying a date of “30” or “20”;
A pixel capable of displaying the date “31” or “21”;
The fifth row has pixels that can only display dates from ``22'' to ``25'' arranged in order from the left, and pixels that can only display dates from ``23'' to ``31'' are arranged in order from the left. and a sixth row, the pixel group is composed of a common electrode group and a divided electrode group formed opposite to each other with the liquid crystal in between, and the common electrode group divides the pixel group into three groups. , has three electrodes that connect the pixels belonging to each group to each other, and the divided electrode group divides the pixel group into 13 groups, and has 13 electrodes that connect the pixels belonging to each group to each other. A calendar display device, characterized in that Sunday is always displayed at the left end by selectively driving the three electrodes of the common electrode group and the 13 electrodes of the divided electrode group.