JPH10186064A - Wrist watch device provided with power generating function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To invariably display the power generation state and electricity storage state by forming an opening section on the dial of a wrist watch, and displaying the power generation state or electric capacity on the opening section with characters or colors. SOLUTION: A watch case 11 is provided with a dial 13, a solar battery 14, a color filter plate 15 showing an electricity storage quantity, a day plate 16 showing a day, a circuit section 17, and a secondary battery 18 storing the generated electricity from the side of a windshield glass 12. The dial 13 is provided with a dial opening section 22 showing the day of the day plate 16 and the opening section 23 of the solar battery 14, and the color filter plate 15 showing the charge storage quantity of the secondary battery 18 is arranged on the day plate 16. The color filter plate 15 displays the reduction and exhaustion of the stored charges in yellow and in red respectively. The information of the color filter plate 15 and the information of the day plate 16 can be observed through the dial opening section 22 and solar battery opening section 23. When the stored charges are exhausted, for example, a red color filter is arranged above a day number in the solar battery opening section 23. A stop of the watch or a delay of time can be recognized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wristwatch device having a solar cell that uses light as an energy source as a power generation function, a power generation device that converts heat energy due to a temperature difference into electric energy, or a power generation device that uses kinetic energy. The present invention relates to means for informing a user of the situation based on the amount of generated power or the amount of stored electricity. further,
The present invention relates to a means for notifying a user of a state in which the amount of stored electricity has been exhausted and stopped. Further, when the liquid crystal display panel is provided to improve the function of the wristwatch device, a part of the display function of the liquid crystal display panel is stopped or the power consumption is reduced by using a part of the plurality of liquid crystal display panels. Related to means for performing the following.

[0002]

2. Description of the Related Art A conventional energy source for driving a wristwatch apparatus is a simple consumption type battery. When the battery is exhausted once and the function of the wristwatch stops, a means for replacing the battery has been used.

[0003] However, attention has been paid to wrist watches having a power generation function in order to eliminate the necessity of replacing batteries with attention to environmental problems or energy problems on the earth.

As a power generation function, a solar cell using light as an energy source, a power generation device that converts heat energy into electric energy, or uses kinetic energy have been developed.

The structure of a current wristwatch device will be described with reference to the drawings. FIG. 18 is a plan view schematically showing a planar structure of a wristwatch device in the related art. FIG. 19 shows F in FIG.
It is sectional drawing which shows the cross section in the -F line typically. The watch case 11 has a windshield 12 and a back cover 19, and a dial having a blinding effect that makes it difficult to recognize a pattern or a mechanism of a substrate (power generation device) 14 having a power generation function from the windshield 12. 13, a solar cell having a power generating mechanism by light energy, or a substrate 14 having a mechanism for converting thermal energy to electricity, or a mechanism for converting kinetic energy to electricity, a date plate 16 indicating the date, and a circuit section 17
And a secondary battery 18 for storing generated electricity.

The dial 13 has a dial opening 22 for indicating the date of the dial 16. Information on the dial 16 can be observed through the dial opening 22 of the dial 13.

Further, a hole 27 for an axis for driving the hour hand 20 and the minute hand 21 of the timepiece is provided at the center of each of the dial 13, the solar cell 14 and the date plate 16.

[0008]

However, a wristwatch device having a power generation function requires a method for generating power, for example, when a wristwatch with a solar cell power generation function is not irradiated with light or kinetic energy is used. By keeping the wristwatch stationary, the amount of power generation decreases and eventually stops.

In the case of the conventional battery type, the restart is started by replacing the battery, but in the case of having a power generation function, the wristwatch device starts the restart due to the contribution of energy contributing to power generation. .

For this reason, a method of notifying the user of the amount of generated power or the amount of stored electricity has been considered. For example, it is means for using a clock hand.

[0011] The amount of power generation or the amount of stored electricity is notified by the user's will by the scale of a clock corresponding to each amount.

Further, in the case of stopping once and urging the necessity of re-adjusting the time, a means for informing the user by moving the hand for 2 seconds or intermittently has been adopted.

However, as described above, the notification by the hand is complicated due to the user's intention or a method different from the basic operation such as two-second hand movement.

Further, since the operation is stopped once even after the amount of power generation or the amount of accumulation is sufficient, the operation of the hand continues to be different from the normal operation such as moving the hand for two seconds to urge the user to adjust the time. It is necessary to impair the function as a watch.

An object of the present invention is to be made in view of such a technical background. A wristwatch device having a power generation function uses a conventionally used opening, such as a day or a day of the week, to generate power. Alternatively, a means is provided for notifying the user of a reduction in the accumulated amount or a situation in which the storage is stopped once. Further, when the liquid crystal display panel is provided to improve the function of the wristwatch device, a part of the display function of the liquid crystal display panel is stopped or the power consumption is reduced by using a part of the plurality of liquid crystal display panels. Related to means for performing the following.

[0016]

Means for Solving the Problems In order to achieve the above object, a wristwatch device having a power generating function according to the present invention employs the following configuration.

The wristwatch device of the present invention is a wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor. Alternatively, electric capacity is displayed.

The wristwatch device of the present invention is a wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor and a capacity or a secondary battery for storing power generation. The power generation status or the electric capacity is displayed by characters or colors displayed on the section.

The wristwatch device of the present invention is a wristwatch device having a function of generating electricity by a solar cell or a temperature difference or a rotating motion of a rotor. , Or on a day of the week, a color filter for displaying different colors depending on the power generation state or the electric capacity is provided.

The wristwatch device of the present invention is a wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor. , Or on a day of the week, a color filter plate for circumferentially disposing a color filter for displaying different colors according to the power generation state or the electric capacity is provided.

The wristwatch device of the present invention is a wristwatch device having a function of generating electricity by a solar cell or a temperature difference or a rotating motion of a rotor. Or on a day of the week, a color filter and an opening for displaying different colors depending on a power generation state or an electric capacity are provided.

The wristwatch device of the present invention is a wristwatch device having a function of generating electricity by a solar cell or a temperature difference or a rotating motion of a rotor. Alternatively, a color filter for displaying different colors depending on a power generation state or an electric capacity and a color filter plate having openings arranged circumferentially are provided on the day of the week.

The wristwatch device of the present invention is a wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor. A liquid crystal display panel having different optical characteristics depending on electric capacity is provided, and information on the liquid crystal display panel is displayed through an opening.

The wristwatch device of the present invention is a wristwatch device having a function of generating power using a solar cell, wherein a dial plate of the wristwatch and a liquid crystal display panel for blindfolding the power generation device and a color filter for displaying different colors depending on the power generation state or electric capacity are provided. And the function of varying the transmittance of the liquid crystal display panel depending on the amount of power generation, and displaying the power generation state or electric capacity with a color filter.

The wristwatch device according to the present invention is a wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor. The wristwatch device has a liquid crystal display panel for displaying a power generation amount or an electric capacity. The panel is
A function of being arranged on a windshield of a wristwatch device, detecting a decrease in the amount of power generation, or a decrease in electric capacity by a circuit unit, and applying a decrease signal of the electric capacity to the liquid crystal display panel from the circuit unit;
The circuit portion has a function of stopping display of a portion other than a portion to which the reduction signal is applied.

The wristwatch device of the present invention is a wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor and a function of displaying information by a liquid crystal display panel. A function to detect the circuit part and limit the display function of the liquid crystal display panel, or stop the supply of voltage to the liquid crystal display panel, and display a decrease in the amount of power generation or a decrease in the electric capacity with the liquid crystal display panel Characterized by having a liquid crystal display panel.

The wristwatch device of the present invention is a wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor and a function of displaying information by a liquid crystal display panel. By performing a gradation display, or a color, or a positive / negative display, and detecting a decrease in the amount of power generation or an electric capacity by a circuit unit, and reducing the electric capacity, thereby reducing the number of driven liquid crystal display panels, In addition, the liquid crystal display panel has a liquid crystal display panel capable of displaying a decrease in the amount of power generation or a decrease in electric capacity.

The wristwatch device of the present invention is a wristwatch device having a function of generating electricity by a solar cell or a temperature difference or a rotating motion of a rotor and a function of displaying information by a liquid crystal display panel. Performs gradation display, color, or positive / negative display, and detects a decrease in the amount of power generation or electric capacity by the circuit unit. Stop in descending order,
In addition, the liquid crystal display panel includes a liquid crystal display panel capable of displaying a decrease in power generation amount or a decrease in electric capacity by a liquid crystal display panel having the lowest power consumption among the plurality of liquid crystal display panels.

The wristwatch device of the present invention is a wristwatch device having a function of generating power using a solar cell, comprising a plurality of liquid crystal display panels for displaying the amount of power generation or electric capacity, and at least one of the liquid crystal display panels. Is provided close to the upper surface of the solar cell, and has a function of increasing the transmittance by decreasing the electric capacity, and displaying a decrease in the amount of power generation or a decrease in the electric capacity by another liquid crystal display panel. I do.

(Operation) In the wristwatch device of the present invention, there is provided a power generation unit (power generation device) having a power generation function, an electric storage unit for storing electric charge generated by the power generation unit, and a time for generating a time signal by the electric charge of the electric storage unit. A wristwatch device having a signal generation unit, a clock hand indicating time, a date plate indicating date, or a day plate indicating day of the week, and a drive unit that rotates the hands and the like of each clock as necessary by the time signal generation unit. , A power generation amount detection unit for detecting the power generation amount, a storage amount detection unit for detecting the storage amount of the electric storage unit, and a remaining amount indicating the remaining amount of the electric storage unit or the stop of the time signal generation unit by a color filter or characters. By providing a display unit and a remaining amount display drive unit that drives the remaining amount detection unit based on the signal of the accumulated amount detection unit, the inaccuracy of the time due to the power generation state or the accumulation state of electricity or the stoppage of the time signal generation unit is reduced. Always table It can be.

Further, as means for enabling various types of display, a liquid crystal display unit or an electrochromic (EC)
The display is effective.

Further, since the operation of the hands of the timepiece can be made the same as the normal operation, the added value of the wristwatch can be improved without impairing the appearance of the wristwatch device which emphasizes decorativeness. .

Further, by using a color filter or a character display used for the remaining amount display unit and an opening for date or day of the week which is used for a conventional wristwatch, the decorativeness can be displayed without any difference in the decorativeness. Make it possible.

Furthermore, by providing a transparent portion without a color filter during normal operation, decorativeness which is not different from the conventional one can be obtained.

Further, when the hour hand, the minute hand and the second hand of the hand type wristwatch device are insufficiently displayed, for example, when a display such as character information or a telephone number has a liquid crystal display panel as a hand type supplementary information. In addition, the circuit unit detects a decrease in the amount of power generation or a decrease in the amount of electric storage, and has a function of partially stopping the display of the liquid crystal display panel. Since the transmission of the vibrator can be prevented from being stopped, the stop of the clock function can be prevented.

Further, when gradation display, color display, and positive / negative display are performed using a plurality of liquid crystal display panels as needle-type supplementary information, a decrease in the amount of power generation or a decrease in the amount of stored electricity is detected by the circuit unit. In addition, by reducing the number of driven liquid crystal display panels and reducing the power consumption of the liquid crystal display panels, the operation of the plurality of liquid crystal display panels is stopped in descending order of power consumption, and the amount of stored electricity is reduced. Is performed by the liquid crystal display panel with the minimum power consumption, a display with a large amount of information can be achieved in the steady state, and the duration of the basic performance of the watch can be extended in the case of a decrease in the amount of stored electricity, and It is possible to present a warning due to a decrease in the amount of stored electricity.

Further, in the case of a wristwatch device using a solar cell as a power generation means, at least one of the plurality of liquid crystal display panels is disposed on the solar cell, and the amount of electricity stored on the watch is reduced. By improving the transmittance of the liquid crystal display panel, the power generation amount of the solar cell can be improved from the steady state, so that the duration of the clock function can be extended and high-speed charging can be performed.

Further, the power generation can be increased by improving the transmittance of the liquid crystal display panel on the solar cell by the circuit section in accordance with an instruction from the user of the wristwatch device, and furthermore, in the steady state, The color display of the liquid crystal display panel, the white scattering display, and the black display can hide the color of the solar cell.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a wristwatch device having a power generation function according to a best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view illustrating an embodiment of a wristwatch device having a power generation function according to the present invention. FIG. 2 is a schematic sectional view taken along line BB of FIG. FIG. 3 is a schematic plan view of a color filter plate used in a wristwatch device having a power generation function according to the present invention. FIG. 4 is a block diagram for displaying the present invention.
Hereinafter, the first embodiment will be described with reference to FIGS. 1, 2, 3 and 4 alternately.

The watch case 11 is provided with a windshield 12 and a back cover 19.
Dial 13 which also has a masking effect to make it difficult to recognize the pattern of
And a color filter plate 15 indicating the amount of stored electricity, a date plate 16 indicating the date, a circuit section 17, and a secondary battery 18 for storing generated electricity.

The dial 13 has a dial opening 22 for indicating the date of the dial 16. The solar cell 14 also has a solar cell opening 23. Also, on the date plate 16, 2
A color filter plate 15 for indicating the amount of charge stored in the secondary battery is arranged, and a dial opening 22 and a solar cell opening 23 are provided.
Thereby, the information on the color filter plate 15 and the information on the date plate 16 can be observed.

As shown in FIG. 3, the color filter plate 1
Reference numeral 5 denotes a transparent portion 24 indicating a normal use condition and a yellow color filter 25 indicating that the accumulated charge is reduced.
And a red color filter 26 indicating that the stored electric charge has been exhausted and stopped, are alternately arranged in a circumferential shape.

If the wristwatch device having the power generation function does not generate power for a long time and the accumulated electric charge is depleted, FIG.
As shown in the figure, a red color filter 26 is arranged on the date in the dial opening 22 and the solar cell opening 23 of the dial 13.

As described above, it is possible to notify the user of the status of the stoppage of the clock or the status of time delay.

Further, at the center of each dial 13, solar cell 14, color filter 15, and date plate 16, the hour hand 2
0, a shaft hole 27 for driving the minute hand 21 is provided.

As shown in the block diagram of FIG. 4, electric charges generated by the solar cell 14 as power generating means are stored in the secondary battery 18. The charge amount of the secondary battery is detected by the voltage detection circuit 31.

The pulse excitation circuit 32 is activated by the signal of the voltage detection circuit 31, the pulse motor control circuit 33 is activated, and the color filter plate 1 is moved to predetermined color filters 24, 25 and 26 by the pulse motor 38.
Rotate 5 Further, a return circuit 34 is provided for returning the color filter plate 15 to a predetermined position.

The position of the color filter plate 15 is detected, for example, by changing the size of the notch for rotation at the place of the transparent portion 24 and the yellow color filter 25, detecting the torque with the gear, and detecting the position of each color filter. There is a means for detecting a torque difference.

The color filter is initialized to the transparent portion 24 when the user recognizes the user, for example, when the red color filter 26 notifies the depletion of the storage amount of the secondary battery 18 by the red color filter 26, and the user sets the time. There are also means.

In order to operate the hour hand 20 and the minute hand 21 of the timepiece, the hour hand 20, the hands, and the pointer are transmitted via a reference pulse generating means (OSC) 35, a time signal generating means 36, a pulse motor driving means 37 and a pulse motor 39. 39 (hour hand 2
0, the minute hand 21).

As described above, by using the color filter plate 15 for the wristwatch device having the power generation function of the present invention, special processing of the second hand of the timepiece or the dial 13 of the timepiece or the secondary battery 18 can be performed. The display can be performed without adding a special needle or the like for notifying the remaining amount of the battery.

Further, since the present embodiment can be achieved by the color filter plate 15 and the simple circuit configuration, the power generation status of the solar cell 14 or the charge storage status of the secondary battery 18 can be determined without impairing the important decorativeness of the wristwatch. It can be displayed.

Hereinafter, a second embodiment for carrying out the present invention will be described with reference to the drawings. FIG. 5 is a schematic plan view illustrating an embodiment of a wristwatch device having a power generation function according to the present invention. FIG. 6 is a schematic sectional view taken along the line B-B of FIG. FIG. 7 is a schematic cross-sectional view showing a mounting state of the solar cell and the liquid crystal display panel of FIG. FIG. 8 is a graph showing transmittance versus applied voltage of the liquid crystal display panel used in the present embodiment. Hereinafter, the second embodiment will be described with reference to FIGS. 5, 6, 7, and 8 alternately.

The watch case 11 is a so-called one-piece watch case 11 in which a windshield 12 is attached and the back cover is formed integrally with the watch case 11. From the windshield 12 side, the minute hand 21 and the hour hand 20 serving as hands, the dial 13 having a masking effect to make it difficult to recognize the pattern of the solar cell 14, the liquid crystal display panel 41, the solar cell 14, the circuit section 17, and the power generation And a secondary battery 18 for storing electricity to be stored. Also, on the dial 13,
The dial opening 22 is provided in a portion corresponding to the liquid crystal display panel 41 arranged at the 12 o'clock position.

For the liquid crystal display panel 41, a liquid crystal having a memory property is used. When the charge storage amount of the secondary battery 18 is reduced or exhausted, the state is stored in the memory liquid crystal, and the state is stored until specified again. . As the liquid crystal having a memory property, a ferroelectric liquid crystal may be used. The feature of the second embodiment is that the solar cell 1 has a configuration including a windshield 12, hands 20, 21, a dial 13, a liquid crystal display panel 41 having a memory function, a solar cell 14, and a circuit 17.
The point 4 is that the warning of the remaining amount is performed using the memory property of the liquid crystal display panel 41. Further, the liquid crystal display panel 41
By reducing the area of the photovoltaic device, a decrease in the ratio of the area that contributes to the power generation of the solar cell 14 is prevented. Furthermore, since the liquid crystal display panel 41 has a large transmittance in a normal state, the solar cell 14 can be irradiated with light through the liquid crystal display panel 41.

FIG. 7 shows this situation. FIG. 7 shows the applied voltage on the horizontal axis and the transmittance on the vertical axis. When the applied voltage is large (during normal operation), the transmittance is large, and when the voltage is small (no power generation or accumulated charge), , Small transmittance.

By arranging the liquid crystal display panel 41 on the upper layer of the solar cell 14, it is possible to prevent the solar cell 14 from being specially processed or reduced in area. Further, in the second embodiment, the liquid crystal display panel 41
The connection between the circuit and the external circuit (circuit 17) is made via an electrode on the solar cell 14, and a means for performing the same connection as the connection between the solar cell 14 and the circuit 17 is adopted. By this means, it is effective for thinning which is important as a watch device for decoration. further,
When thinning, the liquid crystal display panel 4
1 is provided directly. In this case, the solar cell 1
The substrate of No. 4 is used as the substrate of the liquid crystal display panel 41.
In the present embodiment, the former means for using the liquid crystal display panel 41 of the solar cell 14 using another substrate is employed.

FIG. 7 shows this state. FIG. 7 shows a cross section of the liquid crystal display panel 41 and the solar cell 14. Aluminum (A) having good reflection intensity is provided on the solar cell substrate 45.
1) A lower electrode 46 made of an alloy film of titanium (Ti) and a photovoltaic film 4 made of an amorphous silicon (Si) film provided on the lower electrode 46 and a part of the solar cell substrate 45.
7 and an upper electrode 48 made of an indium tin oxide (ITO) film provided on the photovoltaic film 47 and the solar cell substrate 45. The liquid crystal display panel 41 has the first
An electrode made of an indium tin oxide (ITO) film is provided on the first substrate 50 and the second substrate 53, and the first substrate 50 and the second substrate 53 have a predetermined gap with a sealant 51. And the first substrate 50 and the second substrate 5
3, a ferroelectric liquid crystal 52 is sealed. Second
An electrode (not shown) on the substrate 53 is made of a third electrode 4 made of the same film as the lower electrode of the solar cell by an anisotropic conductive film (ACF) 54 in which conductive particles are mixed with a thermosetting resin.
9 and is electrically connected. By using the anisotropic conductive film 54 and the third electrode 49, the liquid crystal display panel 41 can be mounted with a very small area.

The use of the memory-type liquid crystal for the liquid crystal display panel is very convenient because even if the charge is reduced or depleted, the situation can be stored without consuming energy.

The liquid crystal display panel 41 can be used as an information display panel 41 for displaying a date, a day of the week, information and the like in a normal state. However, when emphasis is placed on the decorativeness of a wristwatch, for example, a small display area may be provided at 12 o'clock or 6 o'clock to simply issue a warning of the amount of accumulated charge or a notification of a malfunction. So important that
In the present embodiment, the liquid crystal display panel 41 is arranged at the 12 o'clock position, has a small dial opening 22 at the 12 o'clock position of the dial 13, and issues a warning about the remaining amount of the solar battery or the secondary battery. Simple as shown. By providing the dial opening 22 in a small area, the decorativeness of the wristwatch is improved.

If the wristwatch device having the power generation function does not generate power for a long time and the accumulated electric charge is depleted, FIG.
As shown in the figure, information indicating that the liquid crystal display panel is turned off to disable normal operation is shown.

As described above, it is possible to notify the user of the situation such as the stoppage of the clock or the delay of the time.

By using the second embodiment of the present invention, since the medium indicating the charge accumulation amount is the liquid crystal display panel 41, it can be electrically easily controlled. Therefore, the control system of the liquid crystal display panel 41 is simple. Can be.

As is clear from the above description, the wristwatch device having the power generation function of the present invention displays a liquid crystal panel having a memory function with respect to a decrease in the amount of power generation or accumulation of the solar cell, and presents a warning. . When a warning is issued, the liquid crystal panel having the memory function can select the upper and lower electrodes in a short state or an open state to minimize the driving power of the liquid crystal panel. further,
By mounting the liquid crystal panel using the pattern on the solar cell, the number and volume of components can be reduced, and the thickness can be reduced.

Another embodiment will be described below with reference to the drawings. The third embodiment of the present invention is a combination of the first embodiment and the second embodiment. The dial 13 has a dial opening 22 and a part of the solar cell 14 has a liquid crystal display. The liquid crystal display panel 41 is provided with a date plate 16 in a lower layer. The schematic plan view is in accordance with FIG. 1, and FIG. 9 shows a schematic cross-sectional view. The symbols used are the same as those used in the first embodiment and the second embodiment. The third embodiment will be described below with reference to FIG.

The watch case 11 is a so-called one-piece watch case 11 in which a windshield 12 is attached and the back cover is integrally formed with the watch case 11. From the windshield 12 side, the minute hand 21 and the hour hand 20 serving as hands, a dial 13 having a masking effect for making it difficult to recognize the pattern of the solar cell 14, a liquid crystal display panel 41, the solar cell 14, the date plate 16, and a circuit. It has a unit 17 and a secondary battery 18 for storing generated electricity. The dial 13 has a dial opening 22 in a portion corresponding to the liquid crystal display panel 41.

For the liquid crystal display panel 41, a liquid crystal having a memory property is used. When the charge storage amount of the secondary battery 18 decreases or runs out, the state is stored in the memory liquid crystal, and the state is stored until specified again. . As the liquid crystal having memory properties, a ferroelectric liquid crystal may be used. The feature of the second embodiment is that the solar cell 1 has a configuration including a windshield 12, hands 20, 21, a dial 13, a liquid crystal display panel 41 having a memory function, a solar cell 14, and a circuit 17.
The point 4 is that the warning of the remaining amount is performed using the memory property of the liquid crystal display panel 41. Further, the liquid crystal display panel 41
The substrate constituting the solar cell 14 is used as a substrate on one side of the liquid crystal display panel 41 in order to reduce the material and make it thinner, and a plastic film is used for the opposing substrate. When the liquid crystal display panel 41 is normal, the liquid crystal display panel 41 has a large transmittance, so that the solar cell 14 can be transmitted through the liquid crystal display panel 41 and irradiated with light.

Further, by disposing the liquid crystal display panel 41 on the same surface as the electrode surface of the solar cell 14, the wiring of the liquid crystal display panel 41 and the wiring of the solar cell 14 can be formed of the same material. Since the date plate 16 is provided below the display panel 41, the date plate 16 is used as a diffusion plate of the liquid crystal display panel 41, which is economical. Furthermore, this third
In the embodiment, the connection between the liquid crystal display panel 41 and the external circuit (circuit 17) is via an electrode on the solar cell 14,
Further, means for performing the same connection as the connection between the solar cell 14 and the circuit 17 is employed. By this means, it is effective for thinning which is important as a decorative wristwatch.

A fourth embodiment will be described below with reference to the drawings. The fourth embodiment of the present invention has a configuration in which a liquid crystal display panel 41 is used for the dial 13. That is, the same liquid crystal display is used to display the pattern of the solar cell, the pattern of the thermoelectric generator 14, or the characters indicating the shielding and the time of the mechanism of the element 14 that converts kinetic energy into electricity, and a warning display indicating the amount of power generation or accumulated charge. This is performed by the panel 41. The symbols used are the same as those used in the first embodiment and the second embodiment. Hereinafter, a fourth embodiment will be described with reference to FIG.

The watch case 11 is a so-called one-piece watch case 11 in which a windshield 12 is attached and the back cover is integrally formed with the watch case 11. From the windshield 12, the minute hand 21, the hour hand 20, which is a pointer, the liquid crystal display panel 41 having a masking effect for making it difficult to recognize the pattern of the solar cell 14, the color filter plate 15, and the circuit unit 17 are used to generate electricity. It has a secondary battery 18 for storing. The solar cell 14 has a solar cell opening 2.
3

The liquid crystal display panel 41 uses a light scattering type liquid crystal whose light scattering property can be controlled by an applied voltage. Further, since the solar cell 14 is used as a power generating element, when the external light amount is weak, the light scattering property of the liquid crystal display panel 41 is reduced, and the pattern of the solar cell 14 is visible, but the transmittance of light to the solar cell 14 is high. And a method of improving the power generation efficiency of the solar cell 14 is employed. Further, the external light amount is measured by utilizing the power generation amount of the solar cell 14 and a means for feeding back to the liquid crystal display panel 41 is employed. In order to simply drive the liquid crystal display panel 41, characters indicating the time are printed on the substrate of the liquid crystal panel 41 by a printing method.

Further, a warning of a decrease in the amount of power generation or a decrease in the amount of accumulated charges can be displayed by controlling the light scattering properties of the color filter plate 15 and the liquid crystal display panel 41 at a location corresponding to the display of the color filter plate 15. .

By using the above configuration, particularly when the solar cell 14 is used as a power generation element, the optical characteristics of the liquid crystal display panel 41 are changed by the external light quantity by blindfolding the pattern of the power generation element, and the power generation amount is reduced. It becomes possible to control. Further, by using the color filter plate 15 and the liquid crystal display panel 41, it is possible to present a warning due to the characteristics of the power generation element or the exhaustion of the accumulated charge amount.

Next, a fifth embodiment of the present invention will be described with reference to the drawings. The fifth embodiment uses two liquid crystal display panels.
In addition, the liquid crystal display panel is arranged on the observer side with respect to the hour hand and the minute hand. The liquid crystal display panel is mainly divided into two parts, and the display area of the liquid crystal display panel is varied according to the amount of electric storage, and the display area of the liquid crystal display panel is reduced as the amount of electric storage decreases. It has a configuration to make it. FIG. 11 is a plan view showing the fifth embodiment, and FIG. 12 is a cross-sectional view taken along line CC shown in FIG. The fifth embodiment will be described below by using FIGS. 11 and 12 alternately. Further, the same symbols are used as in the first embodiment and the second embodiment.

The watch case 11 has a windshield 12 and a back cover 19. A first liquid crystal display panel 31 composed of a scattering type liquid crystal display panel and a second liquid crystal display panel 32 composed of a guest-host type liquid crystal display panel containing a dichroic dye in liquid crystal are provided from the windshield 12 side. The scattering type liquid crystal display panel is composed of a liquid crystal mixed with an organic monomer and a cholesteric liquid crystal, and sealed in a gap between a first substrate (not shown) and a second substrate (not shown). A material that scatters external light is used by utilizing the difference between the optical anisotropy of the liquid crystal and the refractive index of the polymer. The scattering type liquid crystal display panel is transparent when a small voltage is applied, and the scattering intensity increases as the voltage increases. For this reason, when no display is performed, the display power can always be kept low.

Further, a guest-host type liquid crystal display panel which has a dichroic dye and does not use a polarizing plate is disposed between the timepiece dial 13 and the scattering type liquid crystal display panel. Thereby, the transmittance of the second liquid crystal display panel 32 can be increased, and the contrast of the scattering type liquid crystal display panel 31 can be improved without being affected by the color of the dial 13. In the fifth embodiment, the color of the dichroic dye of the second liquid crystal display panel 32 is green. Since green has good visibility and feels bright, good display can be achieved by the balance between the scattering type liquid crystal display panel 31 and the second liquid crystal display panel 32. Further, the second liquid crystal display panel 32 employs a means that has a high transmittance when no voltage is applied and is colored by increasing the voltage. By adopting this means, it is possible to increase the transmittance of the first liquid crystal display panel 31 and the second liquid crystal display panel 32 simultaneously without applying a voltage. 3
2 can be very low in power consumption. In addition, the solar cell 14 is arranged on the clock portion 13 on the circuit portion 17 side. The transmittance of the timepiece dial 13 is about 60%, and the transmittance of the first liquid crystal display panel 31 and the second liquid crystal display panel 32 is increased when no voltage is applied, that is, without consuming power. Therefore, efficient power generation of the solar cell device 14 can be performed.

Further, since it is necessary to hold the first liquid crystal display panel 31 and the second liquid crystal display panel 32 on the hour hand 20 or the minute hand 21, the upper retainer 33 made of a rubber liquid crystal display panel and the U-shaped. 1st and 2nd by the upper and lower retainers 34 of the mold
Further, the circuit section 17 is connected to each of the liquid crystal display panels 31 and 32 by a connector 35. A predetermined drive signal is applied to the liquid crystal display panels 31 and 32 by the connector 35. FIG.
As shown in the figure, a character display section 37 for performing character display and a display restriction area 38 in which the display is stopped due to a decrease in the battery storage amount are provided. For this reason, the first liquid crystal display panel 31 and the second liquid crystal display panel 32 are composed of a plurality of block display areas, and adopt a means in which the display of each block is not affected by the mutual blocks. In order to apply the same voltage to the first liquid crystal display panel 31 and the second liquid crystal display panel 32, the input wiring section between the first liquid crystal display panel 31 and the second liquid crystal display panel 32 is provided. This can be easily achieved by employing means for interconnecting.

As described above, the hour hand 20 of the wristwatch device
A first liquid crystal display panel 31 and a second liquid crystal display panel 32 are arranged on the side of the windshield 12 above the minute hand 21, and the dial 13 or the hour hand 20 is arranged by the second liquid crystal display panel 32.
By shielding members located below the second liquid crystal display panel 32 such as the minute hand 21, the hour hand 20 or the minute hand 2
Since the display on the first liquid crystal display panel 31 can be performed without being affected by the information 1, the recognizability of information is greatly improved. Further, the first liquid crystal display panel 31 and the second liquid crystal display panel 32 are driven in the same manner, and further driven independently by a plurality of blocks, so that a display limited area is provided due to a decrease in the battery storage amount, and the display is performed. It is possible to stop, and by reducing the amount of stored electricity, it is possible to prevent the oscillation of the quartz crystal or the stop of the hour hand 20 or the minute hand 21.

Further, the first liquid crystal display panel 31 and the second
By simultaneously driving the liquid crystal display panel 32 with the first liquid crystal display panel 32 and the second liquid crystal display panel 32, the display restricted area can be provided at the same time.
And can be controlled.

Next, a sixth embodiment of the present invention will be described with reference to the drawings. In the sixth embodiment, the liquid crystal display panel has two
In addition, a configuration is used in which the liquid crystal display panel is disposed on a solar cell. Furthermore, the liquid crystal display panel has a configuration that is mainly divided into two, and the display area of the liquid crystal display panel is varied according to the amount of electric storage, and the display area of the liquid crystal display panel is reduced as the amount of electric storage decreases. It has a configuration to make it.
FIG. 13 is a plan view showing the sixth embodiment, and FIG.
FIG. 15 is a plan view showing details of a first liquid crystal display panel arranged on the observer side on the hour hand 20 and minute hand 21 sides of the wristwatch device shown in FIG. 13, and FIG. D
FIG. 16 is a sectional view taken along line EE, and FIG. 16 is a sectional view taken along line EE. FIG. 17 is a sectional view schematically showing a section of the wristwatch device shown in FIG. Hereinafter, FIG. 13, FIG.
The sixth embodiment of the present invention will be described by using FIGS. 15, 16 and 17 alternately.
An embodiment will be described.

The watch case 11 has a windshield 12 and a back cover 19. In the watch case 11, a back cover 19 is provided.
From the side, the secondary battery 18, the circuit section 17, the solar cell 14, the second
Liquid crystal display panel 61, first liquid crystal display panel 60, timepiece dial 13, hour hand 20, minute hand 21, and windshield 12
Becomes In the sixth embodiment, a guest-host liquid crystal for monochrome display is used for the first liquid crystal display panel 60. In this guest-host liquid crystal, a dichroic dye was mixed with the liquid crystal, and a means for making the orientation of the liquid crystal almost vertical when no voltage was applied was adopted, so that the transmittance could be extremely increased without applying a voltage.

Further, the second liquid crystal display panel 61 employs a scattering type liquid crystal, and adopts a mode in which the liquid crystal is transparent when no voltage is applied. Further, the transmittance is improved by lowering the voltage, and the scattering degree is improved by increasing the voltage. This measure is very convenient for the sixth embodiment of the present invention. That is, the solar cell 1
4, or by increasing the transmittance of the scattering liquid crystal by the circuit unit 17 at the request of the user of the wristwatch device, the amount of light transmitted to the solar cell 14 increases, and the power generation amount of the solar cell 14 increases. , The battery can be charged at a high speed. In addition, the color and appearance of the solar cell 14 can be shielded due to the scattering property of the scattering type liquid crystal display device of the second liquid crystal display panel 61, so that the shape of the solar cell 14 can be masked. . Further, it can contribute to an increase in the contrast between the transparent portion and the black display portion of the first liquid crystal display panel 60.

The first liquid crystal display panel 60 has a low-capacity display section 40 for displaying a date, a stopwatch and the like, and a high-capacity display section 41 for displaying a lot of information such as a memo display. Further, the low-capacity display unit 40 and the high-capacity display unit 4
In the vicinity of 1, a ring display unit 39 indicating the battery storage amount is provided. As shown in FIG. 13, the first liquid crystal display panel 60 has a low-capacity display unit 40 that displays a stop watch and a date display 39 and a high-capacity display unit 41 that displays a memo display 42 from a memory circuit. The low-capacity display unit 40
Has a wiring 47 for a low-capacity display section, and further has a circuit section 17.
And a low-capacity connection unit 45 connected to the power supply. The high-capacity display section 41 has a first electrode group 5 as a high-capacity display section wiring.
2 and a matrix electrode composed of a second electrode group 55,
Further, a first high capacity connection section 46 and a second high capacity connection section 49 connected to the circuit section 17 are provided. As described above, the low-capacity display unit 40 and the high-capacity display unit 41 have independent wirings 47, 52, and 53 and independent connection units 45, 46, and 49, respectively. It is possible to stop the display of the high-capacity display unit 41 which requires a large amount of power for display due to the decrease.

Further, the display of the first liquid crystal display panel 60 is stopped. However, since the display of the second liquid crystal display panel 61 is entirely the same, the power consumption is small by an order of magnitude. Aside from the solar cell 14
Is displayed for the blindfold effect. Furthermore, the secondary battery 1
If the storage amount of the storage unit 8 decreases, the driving of the low-capacity display unit 40 is stopped. If the storage amount further decreases, a step of stopping the display of the second liquid crystal display panel 61, improving the transmittance of the scattering type liquid crystal display panel, and improving the power generation efficiency of the solar cell 14 is provided.

The structure of the first liquid crystal display panel 60 is as follows.
As shown in the cross-sectional views of FIG. 15 and FIG.
On 1, a first electrode 52 is provided. First electrode 52
In the low-capacity display section 40, the electrode simply consists of one to several divided electrodes, and in the high-capacity display section 41, it has the shape of N column electrodes. Further, a second electrode 55 is provided on a second substrate 54 provided so as to face the first substrate 51.
And a low-capacity connection 45 connected to the second electrode 55, a first high-capacity connection 46 and a second high-capacity connection 49. In the low-capacity display unit 40, the second electrode 55
The high-capacity display portion 41 has a shape of M row electrodes, and has a shape of a column electrode (M) on the first substrate 51. First
Electrode 5) and a row electrode (second electrode 5) on the second substrate 54.
The matrix display of M * N becomes possible from the intersection with 5).

The first substrate 51 and the second substrate 54 are adhered to each other by a sealing material 58 via a predetermined gap. The first electrode 52 on the first substrate 51 is electrically connected to a part of the wiring of the low-capacity connection portion 45 on the second substrate 54 by the conductive particles 57 mixed in the sealing material 58. Similarly, the second high-capacity connecting portion 49 and the first electrode 52 are also connected by the conductive particles 57. This connection method is called an anisotropic conductive sealing method (ACS method), and the circuit is connected via only one of the two substrates (connection portion) of the first substrate 51 and the second substrate 54. It can be connected to the unit 17. That is, the low-capacity connection part 45, the first high-capacity connection part 46, and the second high-capacity connection part 49 provided on the second substrate are
Connection terminal. Each of the connection parts 45, 46, 49 connects to the circuit part 17 via a connector 62.

Further, in the sixth embodiment, since the second liquid crystal display panel 61 has the same display on the entire surface, the connection with the circuit portion 17 is extremely easy. I use.

As is apparent from the above description, the first liquid crystal display panel 60 and the second liquid crystal display panel 61 are combined to utilize the variable blinding effect of the solar cell 14 to change the color of the solar cell 14. In addition to being used for blindfolding of the pattern shape, it can be used not only for changing the power generation efficiency of the solar cell 14, but also for the interaction between the first liquid crystal display panel 60 and the second liquid crystal display panel 61. Thereby, the display performance of the first liquid crystal display panel 60 can be improved, and information can be appropriately displayed.
Further, the first liquid crystal display panel 60 employs means for improving transmittance when no voltage is applied, and the second liquid crystal display panel 61 employs means for improving transmittance when no voltage is applied. Even if it is placed immediately before the depletion of the secondary battery 18, not only can the power consumption be extremely low, but also the charging efficiency of the solar battery 16 can be greatly improved.

Further, the display area of the first liquid crystal display panel 60 is divided into a plurality of parts, the amount of storage in the secondary battery 18 is referred to by the power consumption of the display, and the display area is restricted, thereby limiting the display area. It is possible to balance the amount of storage of the battery 18 and the amount of power generated by the solar cell 14, which is very effective for a wristwatch device having the solar cell 14.

In the sixth embodiment, a guest-host type is used as the first liquid crystal display panel 60. However, when brightness is somewhat sacrificed, a twisted nematic (TN) type, Twisted nematic (S
A TN) type or the like is effective. Also, the second liquid crystal display panel 6
Although a polymer scattering type liquid crystal is used for 1, a cholesteric selective reflection type or an interface scattering type is also effective.
In particular, when the second liquid crystal display panel 32 is not of the white scattering type but is of a color display, the cholesteric selective reflection mode is, for example, when displaying green, other colors are transmitted. Very convenient for power generation. Therefore, when color display is performed on the second liquid crystal display panel 61, a cholesteric selective reflection type is actually adopted.

[0091]

As is apparent from the above description, the structure of the present invention, that is, the function of shielding the member having the power generation function, the color filter plate that warns the power generation amount or the accumulated charge amount, or the liquid crystal display By providing the panel, the effectiveness of the wristwatch having the power generation function can be more economically enhanced without impairing the decorativeness of the watch.

Further, by providing a portion having a color filter and an opening on the color filter plate, it is possible to present a warning or the like when power generation is to be performed.

Further, the liquid crystal display panel 41 uses a liquid crystal having a memory property, and furthermore, as a drive, it is possible to present a caution or the like in a state where energy is not required when the charge storage amount is exhausted. , The operating time of the watch can be extended.

Further, the color filter plate or the liquid crystal display panel can be more effectively used by aligning the display portion of the color filter plate or the liquid crystal display panel with the opening of the date plate or the day plate.

Further, by arranging a liquid crystal display panel on the side of the windshield 12 and further comprising a plurality of liquid crystal display panels, the liquid crystal display panel is not affected by the lower color of the liquid crystal display panel. Panel display can be performed. Further, by dividing the liquid crystal display panel into a plurality of parts and employing means for stopping the display according to the amount of stored electricity, the operating time of the hour hand or the minute hand can be extended, and the necessity of power generation is presented. be able to.

Further, a plurality of liquid crystal display panels are arranged on the solar cell, and the display quality of the upper liquid crystal display panel is improved by utilizing the transmittance of the liquid crystal display panel close to the solar cell. By varying the transmittance of the adjacent liquid crystal display panel, the amount of power generated by the solar cell can be controlled. Furthermore, by providing an area having a difference in the display capacity of the liquid crystal display panel, referring to the storage amount of the secondary battery and the power consumption of the display, and adopting means for limiting the display area, the operating time of the hour hand and the minute hand can be reduced. Extension and display of a large amount of information are possible.

The present embodiment is particularly effective in the case of having a power generation function. However, in the case of a wristwatch device having a large capacity liquid crystal display panel and large power consumption, the present embodiment is naturally effective. Become. Furthermore, even when the secondary battery in the wristwatch device is charged not from the wristwatch device itself but externally, it is naturally effective to use the embodiment of the present invention in accordance with the amount of electricity stored in the secondary battery. Become.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of a wristwatch according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing the structure of the wristwatch according to the first embodiment of the present invention.

FIG. 3 is a plan view showing a planar shape of a color filter plate used in the first embodiment of the present invention.

FIG. 4 is a circuit block diagram showing a circuit configuration used in an embodiment of the present invention.

FIG. 5 is a plan view showing a configuration of a wristwatch according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating a structure of a wristwatch device according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a mounting configuration of a solar cell and a liquid crystal display panel used in a second embodiment of the present invention.

FIG. 8 is a graph showing optical characteristics of a liquid crystal display panel used in a second embodiment of the present invention.

FIG. 9 is a sectional view showing a structure of a wristwatch device according to a third embodiment of the present invention.

FIG. 10 is a sectional view showing a structure of a wristwatch device according to a fourth embodiment of the present invention.

FIG. 11 is a plan view showing a structure of a wristwatch device according to a fifth embodiment of the present invention.

FIG. 12 is a sectional view showing a structure of a wristwatch device according to a fifth embodiment of the present invention.

FIG. 13 is a plan view showing a structure of a wristwatch device according to a sixth embodiment of the present invention.

FIG. 14 is a plan view illustrating a structure of a first liquid crystal display panel according to a sixth embodiment of the present invention.

FIG. 15 is a sectional view showing a structure of a first liquid crystal display panel according to a sixth embodiment of the present invention.

FIG. 16 is a sectional view showing a structure of a first liquid crystal display panel according to a sixth embodiment of the present invention.

FIG. 17 is a sectional view showing a structure of a wristwatch device according to a sixth embodiment of the present invention.

FIG. 18 is a plan view showing a configuration of a wristwatch device according to the related art.

FIG. 19 is a cross-sectional view showing a configuration of a wristwatch device according to the related art.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 watch case 12 windshield 13 dial 14 solar cell (power generation function device) 15 color filter plate 16 date plate 17 circuit section 18 secondary battery 20 hour hand 21 minute hand 22 dial opening 41 liquid crystal display panel 54 anisotropic conductive film

Claims (13)

[Claims] In a wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor, a power generation state or an electric capacity is displayed by an opening of a dial of a wristwatch and characters or colors displayed on the opening. A wristwatch device having a power generation function. 2. In a wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor and a capacity for storing power generation or a secondary battery, an opening of a dial of a wristwatch and characters displayed on the opening are provided. Alternatively, a wristwatch device having a power generation function characterized by displaying a power generation state or an electric capacity by a color. 3. A wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor, wherein an opening for displaying a day or a day of the week on a dial of a wristwatch and a day on the opening or a day on the day of the week are provided. A wristwatch device having a power generation function, comprising a color filter for displaying different colors according to the power generation state or electric capacity. 4. A wristwatch device having a function of generating electricity by a solar cell or a temperature difference or a rotating motion of a rotor, wherein an opening for displaying the day or day of the dial of the wristwatch and the day of the opening or the day on the day of the week is displayed. A wristwatch device having a power generation function, comprising: a color filter plate in which color filters for displaying different colors according to a power generation state or an electric capacity are arranged circumferentially. 5. A wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor, wherein an opening for displaying the day or day of the week of the wristwatch and the day of the opening or on the day of the week is displayed. A wristwatch device having a power generation function, comprising a color filter and a transparent portion for displaying different colors depending on the power generation state or electric capacity. 6. A wristwatch device having a function of generating electricity by means of a solar cell or a temperature difference or a rotating motion of a rotor, wherein an opening for displaying a day or a day of the week on a dial of a wristwatch and a day of the opening or a day on the day of the week are provided. A wristwatch device having a power generation function, comprising a color filter for displaying different colors according to a power generation state or an electric capacity and a color filter plate for arranging transparent parts in a circumferential shape. 7. A wristwatch device having a function of generating power by a solar cell, a temperature difference, or a rotational movement of a rotor, wherein the opening for displaying the day or day of the week on the dial of the wristwatch differs depending on the state of power generation or electric capacity. A wristwatch device having a power generation function, comprising a liquid crystal display panel having optical characteristics and displaying information of the liquid crystal display panel through an opening. 8. A wristwatch device having a function of generating power by a solar cell, comprising: a dial of the wristwatch; a liquid crystal display panel for blindfolding the power generation device; and a color filter for displaying different colors depending on the power generation state or electric capacity. A wristwatch device having a power generation function characterized by having a function of varying the transmittance of a liquid crystal display panel according to the amount of power generation and displaying a power generation state or an electric storage capacity with a color filter. 9. A wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor, comprising a liquid crystal display panel for displaying an amount of power generation or an electric capacity, wherein the liquid crystal display panel is a display device of the wristwatch device. A function to detect a decrease in the amount of power generation or a decrease in the electric capacity by the circuit unit and to apply a decrease signal of the electric capacity to the liquid crystal display panel from the circuit unit, and a unit to apply the decrease signal by the circuit unit. A wristwatch device having a power generation function, which has a function of stopping display of parts other than the above. 10. In a wristwatch device having a function of generating power by a solar cell or a temperature difference or a rotating motion of a rotor and a function of displaying information by a liquid crystal display panel, a decrease in the amount of generated power or electric capacity is detected by a circuit unit, A function to limit the display function of the liquid crystal display panel, or a liquid crystal display panel that stops the supply of voltage to the liquid crystal display panel and enables the liquid crystal display panel to display a decrease in power generation or a decrease in electric capacity A wristwatch device having a power generation function. 11. A wristwatch device having a function of generating electricity by a solar cell or a temperature difference or a rotating motion of a rotor and a function of displaying information by a liquid crystal display panel, wherein the liquid crystal display panel performs gradation display or display by a plurality of liquid crystal display panels. The color or positive / negative display is performed, and a decrease in the amount of power generation or electric capacity is detected by the circuit unit. Due to the decrease in electric capacity, the number of driven multiple liquid crystal display panels is reduced, and the amount of power generation is reduced by the liquid crystal display panels. Or a wristwatch device having a power generation function, comprising a liquid crystal display panel capable of displaying a decrease in electric capacity. 12. A wristwatch device having a function of generating electricity by a solar cell or a temperature difference or a rotating motion of a rotor and a function of displaying information by a liquid crystal display panel, wherein the liquid crystal display panel is a gradation display by a plurality of liquid crystal display panels. , Or color, or positive / negative display, and the amount of power generation, or the decrease in electric capacity is detected by the circuit unit, and the number of driven liquid crystal display panels is stopped in descending order of power consumption due to the decrease in electric capacity, A wristwatch device having a power generation function, comprising: a liquid crystal display panel capable of displaying a reduction in the amount of power generation or a reduction in electric capacity by using the liquid crystal display panel having the lowest power consumption among the plurality of liquid crystal display panels. 13. A wristwatch device having a function of generating power by a solar cell, comprising a plurality of liquid crystal display panels for displaying a power generation amount or an electric capacity, wherein at least one of the liquid crystal display panels is an upper surface of the solar cell. And a function of increasing the transmittance due to a decrease in electric capacity and providing a function of displaying a decrease in the amount of electric power generated or a decrease in electric capacity by another liquid crystal display panel. Watch device.