JPH028785A - electronic memo pad - Google Patents

Abstract

PURPOSE:To avoid wasteful power consumption by performing no coincidence comparison of time data until the next unit time arrives when there is no schedule in a unit time within a data memory. CONSTITUTION:A signal inputted to a unit time circuit 10 from a clock circuit 19 is a carry signal of a unit time (e.g., a carry-up signal of 10 min or one hr). Therefore, when the carry-up signal of one-hour position is inputted from a circuit to the circuit 10, the circuit 10 outputs the time (set to a-o'clock) at that time at first to input the same to the second collation circuit 11. The time in the data memory 5 inputted to the circuit by one address by a control circuit 6 and each time is compared with a-o'clock. At the time of coincidence, time data is transmitted to a coincidence circuit 4 at every min carry-up to perform comparison or necessary display. At the time of non-coincidence, the next hr carry-up is performed after waiting. By this method, when there is no schedule for a time of 00-59 min in the memory 5, it is unnecessary to perform coincidence comparison and, therefore, wasteful power consumption is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a time verification method for an electronic memo pad that stores date, time and text electronically and displays the date and time by some means when the current time arrives.

A conventional example for explaining the functions of an electronic memo pad is shown in FIG. In the figure, reference numeral 1 indicates input and control keys (a plurality of keys).

2 is a display section for displaying stored contents. Table 1 shows one type of text to be stored.

January 24, 1980 A? 110:30 C0NFE
NCE January 24, 1980 11:45 AM ET
ING January 24, 1980 PM 3 o'clock O molecule ELH
PIIONE Table 1 The operator inputs the year, month, day, hour, minute, and text using the keys, and then presses the key (the number key in Figure 1) that commands storage in the data memory to complete the memorization operation. do.

On the other hand, the storage circuit has a structure as shown in FIG. In the example of FIG. 2, it is assumed that valid data has already been stored in the shaded area, and the blank space represents the address of the data to be stored, so the aforementioned data will be stored at address 5.

On the other hand, 9 is a circuit (clock circuit) having a timekeeping function, which generates year, month, day, hour, and minute data.

The data becomes an input to a 4-number circuit. The 1-minute digit carry signal from the clock circuit 9 is input as an output to the data memory control section 6, and the year to minute data at each address in the data memory is transferred to the 4-number circuit for matching. Take. If there is a match, the data at that address is transferred to the display memory 7 and displayed on the display circuit 8. If there is a mismatch, 6
In this case, the address of the data memory is incremented by one address, and the match verification is performed again using the minus number circuit. In this way, the carry signal at the minute digit is input to the control circuit of 6, and 1
When the match circuit 4 performs verification every minute, the verification operation is also performed at times when no data is stored in the data memory, which results in wasted power.

Particularly in portable devices such as electronic memo pads, the power source is a battery with a low current draw, and it is desirable to avoid unnecessary consumption. However, if the time is checked when the 10-minute digit is reached, a dilemma arises in that it becomes impossible to memorize the data in units of 5 minutes.

The present invention ameliorates the above-mentioned drawbacks. Figure 3 shows the circuit diagram. Circuits with the same functions as those in FIG. 2 are indicated by the same numbers. 19 is a clock circuit, and the signal inputted to 19-10 is a carry signal of a unit time (for example, a carry signal of 10 minutes or that of 1 hour). Now, when the 1 hour digit carry signal of 19 is input to the unit hour open time circuit shown at lO, 1
Starting from 0, the current time (assumed to be time a) is outputted and inputted to the second verification circuit shown at 11. In 11,
6, the times in the data memory are input one by one, each time is compared with time a, and if they match,
Time data is transferred from 19 to 4 every minute digit, and comparison and necessary display are performed.

If there is no match (when there is no existing time in the data memory), wait until the next time digit. By doing this, if there is no schedule from 00 minutes to 59 minutes in the data memory, there is no need to perform a -number comparison. This reduces unnecessary power wastage. Furthermore, it is possible to store data in minutes, which eliminates the dilemma described above.

Therefore, the present invention is a time verification method most suitable for portable electronic memos.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an electronic memo pad. FIG. 2 is a diagram showing a conventional memory circuit. FIG. 3 is a diagram showing an example of the circuit of the present invention. Prisoner 11 that's all Applicant: Seiko Epson Corporation Agent: Patent attorney Kizobe Suzuki and 1 other person Figure 2

Claims (1)

[Claims] The date and time or schedule are stored in the data memory, and when the time measured by the clock circuit and the stored time match, the display is driven and the electronic memo pad announces the arrival of the time. Detects the presence or absence of a schedule in memory,
When there is a time, detailed verification is carried out over a minute time within a unit time, and when there is no time, until the arrival of the next unit time,
An electronic memo pad characterized by stopping the verification operation.