JPH08122468A - Analog lcd wrist watch wherein led display is provided - Google Patents

Abstract

PURPOSE: To accurately read time even in a dark place by adding a LED watch and causing a LED display to emit light by a LED watch driving circuit. CONSTITUTION: For a wristwatch 1a having a LED display 5, an analog movement 6 and a circuit board 7 to which the LED display 5 is stuck are connected together to constitute a module in a normal wristwatch case 3a. By a battery loaded in the wristwatch 1a, an LED watch circuit part and an analog watch circuit part are caused to continue their operations. Then, a button switch 18 formed in one side of the case 3a is operated while the LED display 5 is OFF, and an interlocking switch 19 is turned ON once. Thus, the LED display 5 is set, a light emission operation is performed for a certain time, a light is projected through a light diffusion filter 10a on the upper side to the character plate of a semi-transmissive light reflection plate 11a and a current time is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wristwatch provided with an LED display and having a nighttime reading function.
The IC circuit having the LED clock function causes the LED display to emit light to display the time so that the time can be easily read even in a dark place.

[0002]

2. Description of the Related Art Currently used wristwatches and the like have an analog clock and a liquid crystal display (LC
Most of them are digital clocks that display the time as numbers in D), and these have the disadvantage that the time cannot be read without an external light source. To compensate for this, in the former case, Applying a luminous body to the pointer so that the pointer can be read by the accumulated light, and in the latter case, a small lamp can be attached and the built-in battery can turn on the lamp to read the time. There are things that I was able to do.

[0003]

However, in the case of a light-emitting body, its function cannot be exhibited in a dark place unless the light is applied to the light for a certain period of time to accumulate the light, and in the case of a small lamp. However, due to the structural characteristics that it is attached to one side of the LCD, it is not possible to see clearly as a whole and its functions are limited, so that it is difficult to read the exact time at any time in a dark place. That inconvenience still existed.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, the present invention suspends the luminous body application pointer or the small lamp illumination system, and operates an LED that works in conjunction with a normal analog timepiece or LCD timepiece as shown in FIG. A clock is attached and the LED clock drive circuit causes the LED display to emit light, and the current time is displayed by numbers, so even when the surroundings are dark and it is not possible to read the time on the hands of the analog clock or the LCD, it is accurate. The time can be easily read, and the drawback that the conventional LED timepiece cannot always display the time due to excessive current consumption is compensated by an analog timepiece or an LCD timepiece.

[0005]

The present invention will now be described in detail with reference to the accompanying drawings. (Embodiment 1) When assembling a wristwatch 1a provided with an LED display 5 as shown in FIG. 1, an analog movement 6 and a circuit board 7 to which the LED display 5 is attached are combined in a normal wristwatch case 3a. The module 4 is composed of the analog movement 6 and the LED.
A metal plate 8 provided with an LED display window 9 on the upper side of the display 5 and a light diffusion filter 10a.
And the dial of the semi-transmissive reflection plate 11a are stacked in order to assemble, but the analog movement 6 and the LED are used.
It is also possible to omit the dial plate of the semi-transparent reflection plate 11a provided on the upper side of the display 5 and use the metal plate 8 provided with the LED display window 9 as the dial plate.

(Embodiment 2) When assembling a wristwatch 1b having an LED display 5 as shown in FIG.
6, the configuration of the module 4 is combined with the LCD clock circuit unit 31 different from the analog clock circuit unit 30 of FIG. 3, but the LED display 5 and the LCD clock IC are combined.
LC provided with a semi-transmissive reflection plate 11b on the upper side of the LED display 5 of the circuit board 13 provided with 21 and 21 via a light diffusion filter 10b.
It can also be configured with the D module 14.

1 to 4, reference numeral 16 is a battery holder, 23 is a connector, and 24 is a pointer. In the case of the first embodiment configured in this way, the LED clock circuit unit 25 and the analog clock circuit unit 30 continue to operate by the battery 15 mounted on the wristwatch 1a, but the LED display 5 is "OFF". In this state, the button switch 18 formed on one side of the case 3a is operated to turn on the interlocking switch 19 once to turn on the LED.
The display 5 emits light for a predetermined period of time, and the semi-transmissive reflection plate 11 is passed through the upper light diffusion filter 10a.
Light is projected on the dial a to display the current time. In the case of the second embodiment, the LED display 5 emits light in accordance with the “ON” operation of the switch 19 which is interlocked with the button switch 18, and the LCD 12 having the semi-transmissive reflection plate 11b attached thereto emits light through the upper light diffusion filter 10b. Is projected to display the current time. In this way, time reading in the dark is accurate and easy.

For reference, since the current consumption of the LED display 5 during the light emitting operation is too large, the operating time is limited to the minimum time at which the current time can be read to reduce the current consumption of the battery and increase the battery length. The electrical operation relationship of the LED timepiece and the analog timepiece drive circuit that enables the period use is briefly described as follows.

In FIG. 3, the crystal oscillator 26 connected to the input / output terminal of the internal oscillation circuit of the LED timepiece IC 20 oscillates at a frequency of 32,768 Hz when the power source of the battery 15 is applied, and this oscillation frequency is LED clock IC
A frequency dividing circuit and a counting circuit configured inside 20 make a counting output, and the counting output is converted into a code for displaying a change of time through a decoder and input to the LED display 5 to display the time. At the same time, the oscillation frequency at the output end of the internal oscillation circuit is converted into a motor drive pulse signal via the internal oscillation circuit, the frequency dividing circuit, and the conversion circuit of the analog timepiece IC 28 subordinately connected through the coupling capacitor 27. Then, the stepping motor 29 is interlocked with the pointer 24 to display the same time as the LED display 5.

FIG. 6 shows the analog clock circuit section 3 of FIG.
0 is converted into the LCD clock circuit unit 31 so as to work together with the LED clock circuit unit 25. Since the coupling relationship of the oscillation circuit unit is the same as the above, detailed description will be omitted.

As described above, according to the present invention, the LED timepiece provided with the ordinary analog timepiece or LCD timepiece is provided.
The LED clock drive circuit causes the LED display to emit light, and the current time is displayed numerically, so it is accurate and easy even when the surroundings are dark and the time cannot be read by the hands of the analog clock or the LCD. It is possible to read the time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an analog timepiece according to a first embodiment of the present invention, LE
It is an exploded perspective view showing the case where a D display is provided.

2 is a cross-sectional view (12 o'clock to 6 o'clock direction) of an analog module which is a main part of FIG.

FIG. 3 is a circuit diagram of FIG.

FIG. 4 shows an LED in the LCD timepiece that is the second embodiment of the present invention.
It is an exploded perspective view showing the case where a display is provided.

5 is a cross-sectional view (12:00 to 6:00) of the LCD module, which is the main part of FIG.

FIG. 6 is a circuit diagram of FIG.

[Explanation of symbols]

 3a, 3b Watch case 5 LED display 6 Analog movement 8 Metal plate 10a, 10b Light diffusion filter 11a, 11b Semi-transparent reflector 12 LCD (Liquid crystal display board) 15 Battery 17a, 17b Plastic housing 18 Button switch 20 LED clock IC 21 LCD clock IC 22 Back case 26 Crystal oscillator 27 Coupling capacitor 28 Analog clock IC

Claims (3)

[Claims] 1. A metal plate having an LED display window provided on the upper side of the LED display and the analog movement so that the circuit board provided with the LED display on a normal wristwatch case and the analog movement are coupled and interlocked with each other. A light diffusion filter and a semi-transparent reflecting dial plate are provided in this order inside the module. By operating a button switch on one side of the wristwatch case, the LED display emits light and the semi-transparent light is transmitted. An analog wrist watch provided with an LED display characterized by displaying time on a dial of a reflector. 2. The analog wristwatch according to claim 1, wherein the semi-transparent dial plate is omitted, and the dial plate can be provided with a metal plate provided with an LED display window. 3. An LED watch unit and an L are provided on a normal watch case.
By installing the LCD with the light diffusion filter and the semi-transmissive reflector attached to the upper side of the LED display so as to interlock with the CD clock section on the circuit board, the module is internally provided. An LCD wristwatch provided with an LED display characterized in that the LED display emits light by operating a button switch on one side of the wristwatch case, and time is also projected on the LCD.