JPS604156Y2 - clock lighting control device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a lighting control device for a watch.

Conventionally, even in watches that have a light-emitting element that illuminates the time display and also have a sleeve mechanism, in order to control the brightness and darkness of the lighting at times such as going to bed and waking up, the light-dark switch can be operated to switch between bright light-emitting elements and dark light-emitting elements. Previously, one of the light emitting elements was selected.

Therefore, when activating the sleeve mechanism before going to bed,
The user had to operate the set switch and then operate the light/dark switch to dim the lighting, which was cumbersome and undesirable.

Therefore, the present invention eliminates the above-mentioned drawbacks by controlling the illumination of the time display section by operating a switch for the sleeve.

An embodiment of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, 1 is a frame of the timepiece device, and 2 is a time display section composed of a liquid crystal cell, which is fixed to the frame 1. In FIG.

Reference numeral 3 denotes a lamp that illuminates the time display section 2, and is fixed to a protrusion 1a provided on the frame 1.

4 is a drive circuit for the time display section 2 and the lamp 3, which also has a timer.

5 is a reflective plate such as a mirror, 6, 7, and 8 are for sleeves, respectively.
This is an automatic return type switch for changing the light/darkness of the lamp 3 and for correcting fast forwarding.

FIG. 3 shows the drive circuit 4 in detail.

In the same figure, 9 is a crystal oscillator and 10 is a frequency divider, and output terminals a and b output a signal with a period of 1 second (hereinafter referred to as 1 second signal) and a signal with a period of 1 minute (hereinafter referred to as 1 minute period), respectively. occurs.

Reference numeral 11 denotes a clock circuit for counting time from the 1st digit of the minute to the w digit of the hour, and 12 is an omega-adic subtraction counter, which constitutes a timer.

Reference numerals 13 and 14 designate selection circuits, which are made up of semiconductor switching elements.

The selection circuits 13, 14 each have input terminals P1. When P2 is at a logical high level, the outputs of the clock circuit 11 and subtraction counter 12 are allowed to pass through.

15 is a decoder. 16 is a detection circuit consisting of a gate circuit, and the count content of the subtraction counter 12 is "4 Q 9
1. 59 outputs are generated from terminals P3 and P4, respectively.

17°18...21 are flip-flop circuits.

The flip-flop circuit 20 constitutes a holding circuit, and the output Q of the flip-flop circuit 21 is supplied to an external device such as a radio.

22, 23...26 are differentiating circuits.

27.28...31 are gate circuits, 32,33...
35 is a transmission element such as a semiconductor switching element.

Eo, El. E2 is a power supply, and power supply E1 is a power supply E2
Set it to a lower voltage.

Note that the same numbers as in FIGS. 1 and 2 indicate the same things.

Next, the operation will be explained.

First, normal operation will be explained.

Initially, it is assumed that the flip-flop circuits 17, 18, 19, 21 are all in the reset state, and the switch 8 is open.

The one minute signal from the frequency divider 10 passes through the gate circuit 28 and is supplied to the timer circuit 11.

Since the outputs Q and Q of the flip-flop circuit 18 are now at logical low level and high level, respectively, the selection circuit 13 is activated, and the time measurement output of the time measurement circuit 11 is output from the selection circuit 13.
The clock passes through and is supplied to the decoder 15 and displayed on the time display section 2.

When the above display is performed at night when the surrounding lighting is bright or during the day, the outputs Q and Q of the flip-flop circuit 20 are held at a high level and a low level, respectively, by closing the switch 7. Therefore, the transmission element 34 is held in the on state, and the power source E2 is supplied to the lamp 3, so that the lamp 3 emits light.

The time display section 2 is directly illuminated by the light emitted from the lamp 3 and is also illuminated by the light reflected by the reflector 5 shown in FIG. 2, so that the display is performed with sufficient contrast.

Further, when the illumination of the time display section 2 is dimmed when going to bed, etc., the flip-flop circuit 20 is closed by closing the switch 7.
The levels of the outputs Q and Q are inverted, and the transfer element 35 is held in the on state.

Therefore, the power E1 is supplied to the lamp 3, the luminous intensity of the lamp 3 becomes weaker than above, and the illumination of the time display section 2 becomes darker.

Next, a case will be described in which the subtraction counter 12 is activated at bedtime.

It is now assumed that the count content of the subtraction counter 12 is set to "'59".

Also, before going to bed, the surroundings are usually bright due to indoor lighting, so the lighting on the time display section 2 is usually bright.

Therefore, first, the switch 6 is closed to trigger the flip-flop circuit 17, and its output Q is inverted to a high level, thereby maintaining the single power of the gate circuit 29 at a high level.

On the other hand, this level inversion generates a differential output from the differentiating circuit 22, setting the flip-flop circuits 18, 19, and 21, and resetting the flip-flop circuit 20.

By resetting the flip-flop circuit 20, the transfer element 35 is turned on, and the power source E□ is supplied to the lamp 3.

Therefore, the illumination of the time display section 2 becomes dark.

On the other hand, by inverting the level of the output Q of the flip-flop circuit 21, power is supplied to an external device such as a radio.

Further, by inverting the level of the output Q of the flip-flop circuit 18, the selection circuit 14 is operated, and the count contents of the subtraction counter 12 are passed through and displayed.

Further, due to the level inversion of the output Q of the flip-flop circuit 19, the transfer element 32 is turned on, and the 1
The minute signal passes through transfer element 32 and gate circuit 30 and is supplied to subtraction counter 12 .

Then, the count content of the subtraction counter 12 is subtracted by the 1-minute signal, and when it reaches "0", the terminal P3 of the detection circuit 16 is inverted to a high level, and a differential output is generated from the differentiator circuit 24, which is the gate It passes through the circuit 31 and resets the flip-flop circuit 21.

This inversion of the level of output Q cuts off the power supply to the external device.

On the other hand, by inverting the level of the output Q of the flip-flop circuit 21, a differential output is generated from the differentiating circuit 25, and the flip-flop circuit 17 is reset.

Due to the level inversion of the output Q of the flip-flop circuit 17, a differential output is generated from the differentiating circuit 23, and the flip-flop circuit 18 is reset.

Therefore, the selection circuit 13 is activated, and the output of the clock circuit 11 passes through it and is automatically switched to the normal time display section.

On the other hand, after counting 0゛, the subtraction counter 12 converts the 1 minute signal into 1
In the pulse receiver, when the count reaches 59'', the terminal P4 of the detection circuit 16 is inverted to a high level, and the flip-flop circuit 19 is reset by the differential output.

Therefore, the transmission elements 32 and 33 are turned off and on, respectively, and the supply of the one-minute signal to the subtraction counter 12 is stopped, and the count content of the subtraction counter 12 is held at "59pa."

Then, when you wake up the next morning, close the switch 7 to trigger the flip-flop circuit 20, and the lamp 3 will be connected to the electric wire 2.
The illumination of the time display section 2 is supplied with brightness and display with sufficient contrast.

By the way, the subtraction counter 12 is set to 59 degrees, that is, 59 minutes, but if you want to set a shorter desired time than this, close the switch 8 and open the gate circuit 29, and then divide the frequency. The one second signal from the timer 10 is supplied to the subtraction counter 12, and the switch 8 is closed when the desired time is displayed on the time display section 2.

In addition, when stopping the drive of the external device while the subtraction counter 12 is operating as described above, the switch 6 is closed and the flip-flop circuit 17 is triggered to output its Q.
, invert Q to low and high levels, respectively.

By inverting the output enable level, the flip-flop circuit 18 is reset and switched to normal time display in the same manner as described above.

On the other hand, the flip-flop circuit 20 is maintained in a reset state, and the illumination of the time display section 2 remains dark.

Similarly to the above, when the subtraction counter 12 counts "59", it holds the count contents.

In the above embodiment, the subtraction counter 12 is used to automatically switch from displaying the count contents to displaying the time, but it is not limited to this, and it can also be used in cases where the switching is performed manually, for example, as shown in FIG. Output Q of flip-flop circuit 21
It may also be used in a device in which the display is switched only by closing the switch 6 without supplying it to the flip-flop circuit 17.

In this case, the operation control of the flip-flop circuit 20 is performed by triggering the flip-flop circuit 20 by closing each of the switches 6 and 7, and inverting the output level of the flip-flop circuit 20 each time the switches 6 and 7 are closed. It is.

That is, when the switch 6 is closed at bedtime, the subtraction counter 12 is activated, the display is switched and the lighting is dimmed, and the next morning when the switch 6 is closed again and the display is switched, the lighting is brightened.

As described above, in this case, the illumination is switched from bright to dark and from dark to bright by closing the switch 6.

Further, in the above embodiment, the present invention is used in a liquid crystal display timepiece, but the present invention is not limited to this, and may be used in a leaf-type timepiece, a drum-type timepiece, a pointer display timepiece, and the like.

In this case, the sleeve switch may be used to activate the timer and turn on the light emitting element at bedtime, and turn it off the next morning.

Furthermore, in the above embodiment, illumination was controlled by selecting the voltage value supplied to one lamp and controlling its luminous intensity; however, the present invention is not limited to this. The lighting may also be controlled by

Further, in the above embodiments, a lamp is used as the light emitting element, but the light emitting element is not limited to this, and for example, a fluorescent lamp, an electroluminescent plate, etc. may be used.

Furthermore, the holding circuit is not limited to a flip-flop circuit, and may be any type that selectively holds one of two output states, such as a latching relay.

As detailed above, according to the present invention, since the illumination of the time display section is controlled by the switch for the sleeve, the operation of the timer and the illumination of the time display section can be controlled in one operation. And depending on the lighting conditions,
It is also possible to determine whether the timer is working or not.

In particular, if the timer is used in a device that automatically switches to displaying the time after the timer ends, the time can be displayed with a level of illumination that does not prevent a person from sleeping soundly after the timer ends.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of a timepiece device embodying the present invention, FIG. 2 is a sectional view taken along line 1--2 in FIG. 1, and FIG. 3 is an electric circuit diagram of an embodiment of the present invention. 2...Time display section, 3...Lamp, 6
...Switch, 12...Subtraction counter,
20...Flip-flop circuit.

Claims (1)

[Scope of utility model registration request] A light-emitting element that illuminates the time display section, a timing device whose operation is controlled by a switch for the sleeve, and a timing device that selectively maintains one of two output states by operating the switch. A timepiece lighting control device comprising a holding circuit that changes the lighting state of the light emitting element according to the output state.