JPS6212311Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a digital watch in which multiple sets of colons are installed between the hour display section and the minute display section, and the colons are blinking and one of the colons is always lit. Regarding the colon of the digital watch that holds.

Traditionally, digital watches have only one set of colons between the hour display and minute display,
Apply a 60Hz oscillation input and a 1Hz signal input to the exclusive OR logic circuit, make the colon blink every second,
It was possible to check the operation and read the countdown, and the hour display and minute display were distinguished by a colon, but there were times when the colon was off, making it difficult to distinguish between the hour and minute display. The disadvantages were that it was difficult to distinguish at a glance, and the numbers displayed were difficult to read.

FIG. 1 is an overall view of the display section of a conventional digital watch, and shows the state when colon 1 is off.
The hour display section 2 and the minute display section 3 are difficult to distinguish, resulting in poor visibility.

FIG. 2 is a diagram of the most common conventional driver circuit for driving an LCD.

This invention was devised in order to solve the above-mentioned drawbacks. Multiple sets of colons are installed in a digital clock, and while the colons blink every second, one of the colons is always lit. By eliminating the off-time period, a digital display with good visibility is provided.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is an overall view of the time display section of the digital watch according to the present invention, and is a state diagram when both the outer colon 4 and the inner colon 5 are lit.

The method of blinking the outer colon 4 and the inner colon 5 according to the present invention is not limited to one type, but includes the following three methods. In other words, (a) A method of blinking the outer colon 4 and the inner colon 5 alternately every 1 Hz.

(b) A method in which the outer colon 4 is always lit and the inner colon 5 is blinked every 1Hz.

(c) This is the opposite of (b), where the inner colon 5 is always lit and the outer colon 4 is blinked every 1Hz.

By the above method, by blinking the outer colon 4 and the inner colon 5, the hour display section 2 and minute display section 3 are always distinguished, the visibility of the time display is good, and it is possible to check the operation and count down. It is.

FIG. 4 is a driver circuit diagram for driving the LCD when the outer colon 4 and the inner colon 5 are alternately blinked every 1 Hz.

4 is an outer colon, 5 is an inner colon, 6 is an exclusive OR logic circuit, 7 is an inverter, 8 is a common, A is a signal input terminal, and B is an oscillation input line. Hereinafter, the signal input terminal will be referred to as A, and the oscillation input terminal line will be referred to as B.

1Hz signal input to A of exclusive OR logic circuit 6,
When a 32Hz oscillation input is applied to B, when the signal input of A is "H" level, exclusive logic with the oscillation input of B is established.
The output of the OR circuit 6 becomes the opposite phase, and the outer colon 4 lights up.

When the signal input of A is at the "L" level, the oscillation input of B and the output of the exclusive OR logic circuit 6 are in phase, the outer colon 4 disappears, and it blinks every second. When the signal input of A is fixed at the "H" level, the oscillation input of B and the output of the exclusive OR logic circuit 6 are always in opposite phase, and the outer colon 4 is always lit. When this is passed through an inverter 7 and another inner colon 5 is installed, it is inverted and lights up, and the outer colon 4 and the inner colon 5 blink alternately.

Figure 5 shows the LCD when the outer colon 4 is always on and the inner colon 5 is blinking every 1Hz.
FIG. In Figure 5, a 1Hz signal is input to A of exclusive OR logic circuit 6, and 32 to B is input.
When a Hz oscillation input is applied, when the signal input of A is at the "H" level, the oscillation input of B and the output of the exclusive OR logic circuit 6 become opposite in phase, the inner colon 5 lights up, and the signal input of A becomes At the "L" level, the oscillation input of B and the output of the exclusive OR logic circuit 6 are in phase, and the inner colon 5 blinks every 1 Hz.

Then, the outer colon 4 is passed through the inverter 7.
By disposing B in the exclusive OR logic circuit 6, the oscillation input of B and the output of the exclusive OR logic circuit 6 are always in opposite phases, and the outer colon 4 is always lit.

In addition, in the driver circuit that drives the LCD shown in Figure 5, by exchanging the outer colon 4 and the inner colon 5, the inner colon 5 can be turned on at all times, and the outer colon 4 can be turned on every second. can be made to flash.

With the above combinations, the present invention can select not only one type but many types of modes.

FIG. 6 is a time chart showing the operating state of the exclusive OR logic circuit 6.

In the embodiments of the present invention, the display element is a liquid crystal, but other display elements such as a light emitting diode,
It is optional to use various display elements such as a fluorescent element tube or a discharge display tube, and it is only necessary to select one in consideration of various digital clocks.

Since the present invention has the above-described structure, it is possible to check the operation of the clock, read the countdown, etc. when looking at the time display of a digital clock, but the hour display section and minute display section are connected to the outer colon. It is always distinguished by multiple sets of colons consisting of inner colons, and the time display is always clearly displayed.
It has a concentric structure of stages, and since either the inner or outer side is always blinking, you will not feel the feeling of the colon moving in response to the blinking of the colon, and a stable display can be achieved.

Note that an aesthetic sense can be added by devising the designs of the outer colon 4 and the inner colon 5.

[Brief explanation of the drawing]

FIG. 1 is a state diagram when the colon on the time display section of a conventional digital watch is blinking. Second
The figure is a diagram of a driver circuit that drives a conventional LCD. FIG. 3 is a front view of the digital clock display unit according to the present invention. FIG. 4 is a circuit diagram showing a first embodiment of a driver circuit for driving an LCD according to the present invention. FIG. 5 is a circuit diagram showing a second embodiment of a driver circuit for driving an LCD according to the present invention.
FIG. 6 is a time chart showing the operating state of the exclusive OR logic circuit. 1... Colon, 2... Hour display section, 3... Minute display section, 4... Outer colon, 5... Inner colon,
6...Exclusive OR logic circuit, 7...Inverter,
8...Common.

Claims (1)

[Scope of utility model registration request] In a digital watch, a plurality of sets of colons are installed between an hour display part and a minute display part, and an exclusive OR logic circuit is provided that introduces a signal input for blinking the colons and an oscillation input, and the plurality of sets of colons are arranged in a concentric manner. , and is formed in two stages, inside and outside, and an inverter is disposed between the exclusive OR logic circuit and the colon so that one of the colons is always lit.