JPS5825239B2 - display device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a display device for a watch.

Conventionally, in electronic digital watches, one front element only displays one clock output. Therefore, in watches with a small display space, it is necessary to display seconds or the date. was difficult.

Therefore, in order to eliminate the above-mentioned drawbacks, the present invention uses a part of the display element for displaying hours and minutes to switch and display the date, and also displays the displayed unit. , and can also be switched to display seconds.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figures 1 and 2, 1 is an oscillator such as a crystal oscillator, 2 is a frequency divider, and 3 to 8 are 1/2 seconds.
decimal counter for seconds, hexadecimal counter for seconds, decimal counter for minutes, hexadecimal counter for tens of minutes, decimal counter for hours, and decimal counter for hours. It is a binary counter of digits.

9 is a binary counter, and 10.11 is the 1st digit of the date.
A 0-decimal counter and a 10-digit quaternary counter for the date.

12 to 34 are AND gates, 35 to 42 are OR gates, and 43 and 44 are first and tenth decoders for hours, minutes, and seconds, respectively.

45 and 46 are the 1st decoder and the 10th decoder for date, hour and minute, respectively.

Reference numerals 47 to 50 indicate display elements such as liquid crystals and light emitting diodes for displaying the outputs of the decoders 43 to 46, respectively, forming a pattern of numbers.

Reference numerals 51 to 53 are indicating display elements representing hours, minutes, and seconds, forming patterns H, M, and S, respectively.

54 to 56 are indicator display elements representing the date, hour, and minute, respectively, and have patterns D and H.

Form M.

57 to 59 are inverters, 60 is a changeover switch I), 60a is a contact piece 1.60b, 60c, 60
d is a contact point.

Next, the operation will be explained.

When the contact piece 60a of the changeover switch 60 is connected to the contact point 60b, the output of the counter 7.8 is supplied to the decoder 43.44, and the output of the counter 10.11 is supplied to the decoder 45.44.
46, the date and time are displayed on display element 49.50 and display element 47.48.

On the other hand, instruction display elements 51, 54 are displayed indicating that the date and time are displayed.

When the contact piece 60a is connected to the contact point 60C, the outputs of the counters 5 and 6 are supplied to the decoders 43 and 44, and the outputs of the counters 7 and 8 are supplied to the decoders 45 and 46, so that hours and minutes are displayed. Ru.

Meanwhile, indication display elements 55,52 are displayed indicating that hours and minutes are being displayed.

When the contact piece 60a is connected to the contact 60d, the output of the counter 3.4 is supplied to the decoder 43.44, and the output of the counters 5 and 6 is supplied to the decoder 45.46, so that minutes and seconds are displayed. Ru.

At the same time, indicator display elements 56,53 are displayed indicating that minutes and seconds are being displayed.

In the above embodiment, the instruction display elements each have a pattern formed separately, but the present invention is not limited to this. For example, a character pattern may be formed by character elements made of liquid crystal, light emitting diode, etc. may be selectively displayed.

As detailed above, according to the present invention, the date and seconds are switched and displayed using a part of the display element that displays the hours and minutes. The date, hour, minute and second can be displayed, and since the indication display element indicates that the date is being displayed when the date is being displayed, it is possible to distinguish between the hour and minute display and the date display, preventing the display contents from being mistaken. There is no problem, and the practical effect is great.

[Brief explanation of drawings]

1 and 2 are logic circuit diagrams showing one embodiment of the present invention. 1... Oscillator, 2... Frequency divider, 3-1
1... Counter, 12-34... And gate, 35-42... Or gate, 47-5
0...display element, 54...indication display element, 60...changeover switch.

Claims (1)

[Claims] 1. Provide a reference signal generation source that generates a reference signal, provide a frequency divider that divides the frequency of this reference signal, and provide a counter that receives the output signal of this frequency divider and counts seconds, minutes, hours, and dates. and a display element for receiving count outputs of minutes and hours from the counter by one operation of the changeover switch and displaying the minutes and hours, and (ii) receiving count outputs of the minutes and hours from the counter by another operation of the changeover switch. A first selection circuit is provided to select and display the date using a part of the display element, and to select the count output of seconds from the counter by further operation of the changeover switch, and to display the date using a part of the display element J. 1. A display device comprising: a second selection circuit for displaying seconds using a second selection circuit; and an instruction display element for displaying the type of content being displayed on the display element.