JPH1138162A - Wristwatch device having power generating function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct display of the quantity of generated power or the quantity of stored charge of a wristwatch device having a power generating function with a liquid crystal display panel and to conduct display of the necessity of power generation or an alarm on occurrence of a stop of the wristwatch and the control of the amount of power generation and the amount of charge storage. SOLUTION: This wristwatch device has a reflection type polarizing plate 72, which is disposed above or below a time indicating part or in a part constituting a part of the time indicating part and, moreover, a light-modulating function part, which varies the ratio between a transmission facilitation axis and a reflection facilitation axis of the reflection type polarizing plate 72 for the light from the observer side or the light from the opposite side to the observer side, according to a state of power generation or an electric capacity, and the state of power generation or the electric capacity is displayed therein.

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 a method of notifying 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 method of 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. How to do.

[0002]

2. Description of the Related Art A conventional energy source for driving a wristwatch device is a simple consumption type battery, and a method of replacing the battery when the battery is exhausted once and the function of the wristwatch is stopped has been performed.

[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. 13 is a plan view schematically showing a planar structure of a wristwatch device according to the related art. FIG. 14 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 in the center of the dial 13, the solar cell 14, and the date plate 16.

[0008]

However, a wristwatch device having a power generation function has a method for generating power, for example,
In the case where the wristwatch with a solar cell power generation function is not irradiated with light or uses kinetic energy, the wristwatch is kept stationary to reduce the amount of power generation and finally stop.

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, there is a method 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.

[0012] Further, in order to prompt the user to stop once and to readjust the time, a method has been adopted in which the user is informed of the hand by two-second hand movement or intermittent hand movement.

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 made in view of such a technical background, and is directed to a wristwatch device having a function of generating power by rotating a rotor and a time display unit, A light modulating function unit, for example, a substrate for holding a first polarizing plate and a liquid crystal layer, which is disposed at an upper portion or a lower portion of the time display portion, or a portion constituting a part of the time display portion, and applies a voltage. A liquid crystal display panel comprising an electrode to be formed and a second polarizing plate, and at least the first polarizing plate;
Alternatively, one of the second polarizers is formed of a reflective polarizer, and further controls the voltage applied to the liquid crystal display panel depending on the power generation state or the electric capacity, so that light from the observer side or the light opposite to the observer side is obtained. Provided is a wristwatch device having a function of changing a ratio between a transmission part and a reflection part of a liquid crystal display panel with respect to light from the side, and displaying an abnormality such as a power generation state or an electric capacity, or a stop of a time display part. It is.

[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.

In the wristwatch device of the present invention, there is provided 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 time display unit, wherein an upper portion, a lower portion, or a time display portion of the time display portion is provided. Having a reflective polarizing plate arranged on a part constituting a part of the part,
An optical modulation function that changes the ratio of the easy-to-transmit axis to the easy-to-reflective axis of the reflective polarizer for light from the observer side or light from the side opposite to the observer side, depending on the power generation state or electric capacity. And a function of displaying a power generation state or an electric capacity.

In the wristwatch device of the present invention, there is provided a wristwatch device having a function of generating electricity by a solar cell, a temperature difference, or a rotating motion of a rotor and a time display unit. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, which are arranged in a part of a part of the unit; Polarizer,
Alternatively, one of the second polarizers is formed of a reflective polarizer, and further controls the voltage applied to the liquid crystal display panel depending on the power generation state or the electric capacity, so that light from the observer side or the light opposite to the observer side is obtained. It has a function of changing the transmittance and the reflectance of the liquid crystal display panel with respect to light from the side, and displaying a power generation state or an electric capacity.

The wristwatch device according to 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 time display unit, wherein the time display unit is located at an upper portion, a lower portion, or a time display portion. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, which are arranged in a part of a part of the unit; Polarizer,
Alternatively, one of the second polarizers is formed of a reflective polarizer, and further controls the voltage applied to the liquid crystal display panel depending on the power generation state or the electric capacity, so that light from the observer side or the light opposite to the observer side is obtained. The liquid crystal display panel has a function of changing a ratio between a transmission part and a reflection part of the liquid crystal display panel with respect to light from the side to display a power generation state or an electric capacity.

In a wristwatch device according to the present invention, there is provided 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 time display unit, wherein the time display unit is located at an upper portion, a lower portion, or a time display portion. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, which are arranged in a part of a part of the unit; Polarizer,
Alternatively, one of the second polarizers is formed of a reflective polarizer, and further controls the voltage applied to the liquid crystal display panel depending on the power generation state or the electric capacity, so that light from the observer side or the light opposite to the observer side is obtained. The liquid crystal display panel has a function of changing the ratio of a transmission part and a reflection part of the liquid crystal display panel to light from the side, and opening or blocking information on the back cover side of the liquid crystal display panel.

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, wherein a substrate for holding a first polarizing plate and a liquid crystal layer is connected to a voltage. A liquid crystal display panel comprising an electrode to be applied and a second polarizing plate;
One of the polarizing plate or the second polarizing plate is formed of a reflective polarizing plate, has a liquid crystal display panel for displaying the amount of power generation, or the electric capacity, the liquid crystal display panel with respect to the time display portion of the wristwatch device The circuit section detects the decrease in the amount of power generation or the decrease in the electric capacity, and applies a signal to the liquid crystal display panel from the circuit section to reduce the electric capacity. The liquid crystal display panel has a mechanism in which display of a portion other than the application unit is stopped and the liquid crystal display panel is used as a transmission unit or a reflection unit.

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, wherein a substrate for holding a first polarizing plate and a liquid crystal layer is connected to a voltage. A liquid crystal display panel comprising an electrode to be applied and a second polarizing plate;
One of the polarizing plate and the second polarizing plate is formed of a reflective polarizing plate, and has a liquid crystal display panel for displaying a power generation amount or an electric capacity. The liquid crystal display panel is located on the back of the time display unit 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 capacitance to the liquid crystal display panel from the circuit unit. The display device is characterized in that a display is stopped in a portion other than the above, and the liquid crystal display panel is used as a transmission portion or a reflection portion.

The wristwatch device of the present invention is a wristwatch device having a function of generating electricity by a solar cell and a time display unit, and is provided at an upper portion or a lower portion of the time display portion, or at a portion constituting a part of the time display portion. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate to be arranged; at least the first polarizing plate or the second polarized light; One of the plates is composed of a reflective polarizing plate, and further controls the voltage applied to the liquid crystal display panel according to the power generation state or the electric capacity, so that the light from the observer side is transmitted and reflected by the liquid crystal display panel. And the function of varying the intensity of light incident on the solar cell.

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 time display unit, wherein the time display unit is located above or below the time display unit. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, which are arranged in a part of a part of the unit; Polarizer,
Alternatively, one of the second polarizers is formed of a reflective polarizer, and a plurality of liquid crystal display panels perform gradation display, color display, or positive / negative display, and generate power,
Alternatively, a decrease in the electric capacity is detected by the circuit unit, and the number of driven multiple liquid crystal display panels can be reduced by the decrease in the electric capacity, and the liquid crystal display panel can display a decrease in the amount of power generation or a decrease in the electric capacity. Characterized by having a liquid crystal display panel.

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 time display unit, wherein an upper portion, a lower portion, or a time display portion of the time display portion is provided. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, which are arranged in a part of a part of the unit; Polarizer,
Alternatively, one of the second polarizers is a reflective polarizer, and further detects an abnormality of the time display unit by the circuit unit due to a shortage of the electric capacity or a shortage of the power generation amount, and reflects the reflection between the transmission unit of the liquid crystal display panel and the reflection unit. It has a function of changing the ratio of the time display unit to display an abnormality of the time display unit or shielding the time display unit.

[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 charges generated by the power generation unit, and a time for generating a time signal by the electric charges in the electric storage unit. An analog system comprising a signal generator, 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 of each clock by a time signal generator as necessary. A wristwatch device having a time display unit, or a wristwatch device having a digital time display unit that performs character display by using a liquid crystal display panel or a light-emitting diode (LED) or the like; A storage amount detection unit for detecting the storage amount of the electric storage unit, and an upper or lower part of the time display unit,
Alternatively, a light modulation function unit, which is arranged in a part constituting a part of the time display unit, as a specific example, a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate And at least one of the first polarizing plate and the second polarizing plate is formed of a reflective polarizing plate. Further, the time is reduced due to a decrease or depletion of electric capacity or a shortage of power generation. The circuit unit detects abnormalities in the display unit, and changes the ratio between the transmissive unit and the reflective unit in the liquid crystal display panel to prevent inaccuracy in the time due to the power generation status or the accumulation status of electricity or the stoppage of the time signal generation unit. Can always be displayed.

Further, one of the polarization axes is a transmission axis, and the other is a reflection type polarization plate having a reflection axis as a first polarization plate,
The second polarizing plate is a reflection-type polarizing plate, or one of the polarizing axes is a transmission axis, and the other is an absorption-type polarizing plate having an absorption axis, the first polarizing plate is fixed, and the second polarizing plate is fixed. Is rotated, the transmission characteristic is exhibited at an angle (0 °) at which the transmission axes of the first and second polarizing plates are parallel to each other, and the second polarizing plate is orthogonal to the first polarizing plate ( In the case of 90 °), the reflection intensity can be increased.

Therefore, by using at least one of the polarizing plates constituting the liquid crystal display panel as a reflective polarizing plate, glossy reflection characteristics can be obtained by an external light source, and the electric capacity of a wristwatch device having a power generation function can be reduced. In the event of a decrease, exhaustion, or shortage of power generation, the liquid crystal display panel control signal from the detection circuit shuts off the reflection characteristics of the liquid crystal display panel, that is, the information on the back cover side of the liquid crystal display panel, or the liquid crystal. Information on the back cover side can be presented by the transmission characteristics of the display panel.

Furthermore, in the case of a wristwatch device, the decorativeness is more important than in the case of using an absorption type polarizing plate. First, in a limited area, the incident direction of light from the windshield can be limited, so that compared to a general liquid crystal display device, a plurality of reflective polarizers, or a reflective polarizer and A uniform metallic luster can be obtained by combining with a polarizing plate. Furthermore, by making the absorption polarizer a color polarizer,
The metallic luster and color are improved, and the versatility of the wristwatch device is improved.

Further, by arranging a high-reflectance color reflector on the back cover side of the reflective polarizing plate, it is possible to display a plurality of colors having a reflection characteristic. The power generation status or the electric capacity can be displayed in rich colors.

Further, by using a plurality of reflective polarizers or a combination of a reflective polarizer and an absorption polarizer, even when the reflectance is higher than that of a conventional absorption polarizer alone, the reflective polarizer can be used. Since it is possible to transmit light to the back cover side of the polarizing plate, especially when a solar cell is used as a power generation element,
The light from the windshield side can be transmitted to the solar cell while the pattern on the solar cell is shielded, so the use of light to the observer (windshield side) by using a reflective polarizing plate for the liquid crystal display panel Since the efficiency and the use efficiency of light to the solar cell can be improved, it is very effective for a wristwatch device using the solar cell as a power generation element. Further, by combining the control of the liquid crystal display panel and the power generation state of the solar cell in an electric circuit, it is possible to display the power generation state of the solar cell and control the amount of power generation.

In addition, 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 time display unit may cause an abnormality such as a stoppage of the function or a time delay depending on the power generation state or electric capacity. When doing, place a liquid crystal display panel with a reflective polarizing plate on the windshield side,
By making the entire surface a reflective part and not displaying the time display part or blocking the time display part, it informs the user of the wristwatch device abnormally and presents the wrong time to the surrounding people This is particularly effective for a wristwatch device having a power generation function.

Further, a hand-type wristwatch device, such as an hour hand, a minute hand, and a second hand, has a liquid crystal display panel as a supplementary hand-type display for displaying information such as character information or a telephone number which is insufficiently displayed. In this case, the circuit unit detects a decrease in the amount of power generation or a decrease in the amount of stored electricity, and has a function of partially stopping the display on the liquid crystal display panel. The transmission of the vibrator can be prevented from being stopped, which prevents the clock function from stopping, and the liquid crystal display panel using a reflective polarizer informs the user of the status of the power generation function and also provides the wrong time information. The design can be improved by the combination of the design of the ratio of the reflection part and the transmission part and the base of the liquid crystal display panel. it can.

Further, by designing the ratio of the reflective portion to the transmissive portion in a state where no voltage is applied to the liquid crystal display panel, especially when a solar cell is used as a power generation element, the power generation efficiency of the solar cell and the power generation efficiency of the solar cell can be improved. Reflective polarizers can be used for wristwatches that have limited decoration and limited space and external electrical replenishment, because they can reduce the electric capacity for driving the liquid crystal display panel and improve design. Alternatively, it is important to use a liquid crystal display panel incorporating a reflective polarizing plate.

Further, when gradation display, color display, and positive / negative display are performed using a plurality of liquid crystal display panels, a decrease in the amount of power generation or a decrease in the amount of stored electricity is detected by a circuit unit. Drive the number of
By reducing the power consumption of the liquid crystal display panel, the function of stopping the power consumption of the plurality of liquid crystal display panels in descending order of power consumption and performing a function of notifying the decrease in the amount of stored electricity is performed by the liquid crystal display panel with the minimum power consumption. In the steady state, a display with a large amount of information can be achieved, and in the case of a decrease in the amount of stored electricity, the duration of the basic performance of the watch is extended,
In addition, it is possible to present a warning due to a decrease in the amount of stored electricity.

[0036]

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 AA of FIG. FIG. 3 is an enlarged sectional view of the liquid crystal display panel taken along line AA in FIG. FIG. 4 is a graph showing optical characteristics of voltage, transmittance, and reflectance of a liquid crystal display panel using the reflective polarizing plate of the present invention. The characteristics of the absorbing polarizer are also shown for reference. FIG. 5 is a block diagram used in the embodiment of the present invention. Hereinafter, the first embodiment will be described with reference to FIGS. 1, 2, 3, 4, and 5 alternately.

The watch case 11 has a windshield 12 and a back cover 19, and a time display unit has an hour hand 20 connected to the substrate 17, the secondary battery 18, and the pointer shaft for driving the circuit board and the pointer shaft 74. And the minute hand 21. Further, the circuit board 1
7 has a disk, a coil, and a circuit unit for converting rotational motion into electric energy as a power generating element.

The liquid crystal display panel has a reflection type polarizing plate 72 as a first polarizing plate, a second substrate 54, a second electrode 55 provided on the second substrate 54, and a liquid crystal layer from the windshield 12 side. 59, a first substrate 51, a first electrode 52 provided on the first substrate 51, a sealing material 58 for holding the first substrate 51 and the second substrate 54, and conductive particles 57 included in the sealing material 58 And a reflective polarizing plate 73 as a second polarizing plate. As the reflective polarizing plate 73, an optical film DBEF (trade name) manufactured by Sumitomo 3M Limited is used. In the center of the liquid crystal display panel, a pointer shaft 7 is provided.
In order to provide the pointer shaft hole 27 for penetrating the pointer shaft 4, the periphery of the pointer shaft hole 27 is reinforced by a sealing material 58.

Further, on the first substrate 51 and the first electrode 52 and the second substrate 54 for aligning the liquid crystal layer 59.
An alignment film (not shown) is applied on the second electrode 55 and rubbed, and the liquid crystal layer 59 is twisted by 90 ° from the first substrate 51 to the second substrate 54. Nematic (TN) type is used. Further, the first reflective polarizing plate 72 and the second reflective polarizing plate 73 are arranged so that both the polarization direction and the reflection direction are substantially 90 ° (perpendicular).

Further, on the first reflection type polarizing plate, a seal member 58 constituting a liquid crystal display panel, and a blind plate 71 for shielding a processing end and the like are provided. For example, blindfold board 7
By using a color polarizing plate for 1 and writing a number indicating time on the color polarizing plate, it is possible to display time in a rich color.

Further, in order to connect the liquid crystal display panel to the circuit board 17, a zebra rubber 62 made of a laminate of conductive particles and an insulator is used.

As shown in FIG. 1, the liquid crystal display panel is provided with two types of display patterns, which are roughly divided. A first display area 87 shows information of year, day, day of the week, and country.
The second display area 88 indicates the amount of electricity stored in the secondary battery by the amount of power generated by the power generation element, and has a semicircular fan shape.
Has been split.

FIG. 4 shows the optical characteristics when the first polarizing plate and the second polarizing plate are arranged so that the polarization directions are orthogonal to each other, and both of them are reflection type polarizing plates and are combined with a TN type liquid crystal layer. Show. The horizontal axis represents the voltage applied to the TN type liquid crystal layer, the vertical axis represents the transmittance of the liquid crystal display panel in percent (%) on the left axis, and the right axis represents the reflectance of the liquid crystal display panel in percent. (%). A curve X is a graph showing characteristics of the applied voltage and the transmittance of the liquid crystal display panel. Although there is some difference depending on the measurement method, there is almost no difference in the tendency between the case where the reflection type polarizing plate is used and the case where the absorption type polarizing plate is used. Curve Y is a graph showing the relationship between the voltage applied to the liquid crystal display panel and the reflectance when a reflective polarizing plate is used. Curve Z is a graph showing the relationship between the voltage applied to the liquid crystal display panel and the reflectance when an absorption type polarizing plate is used. It can be seen that there is a large difference in the reflection characteristics between the curves Y and Z.

That is, in a region where the voltage applied to the liquid crystal display panel is small, the transmittance increases, and the light can pass through the base. In the region where the applied voltage is large,
The range is from a low transmittance area (black) to a high reflectance area. Here, in a notebook personal computer or the like, black is insufficient, a decrease in contrast and a glare due to reflection occur, and the current liquid crystal display device is considered to be a better display, so a simple experiment was performed. As a result, the wristwatch device should not be watched for a long time compared to a notebook computer or the like. Since the wristwatch device has a high surrounding margin for a limited area, the direction of light and the direction of a user (observer) of the wristwatch device are relatively limited. The uniqueness of the wristwatch device was obtained by the base of metallic luster or bright colors.

For this reason, in the present embodiment, V1 having a large transmittance and V3 having a large reflectance are used in the first display area 87 for displaying the amount of stored electricity. In the second display area 88 used for character display, V2 having a large transmittance and V2 having a relatively small reflectance and a blackish tint are used.
Use A gold film (not shown) is provided on the circuit board 17 side of the liquid crystal display panel in the second display area 88.
And a structure in which a voltage is small to the liquid crystal display panel or a region where no voltage is applied is golden. Further, on the circuit board 17 side of the liquid crystal display panel in the first display area 87, a gold-colored → blue metallic → green metallic → red metallic color film (not shown) is arranged according to the degree of reduction in the amount of stored electricity. Clarified the degree of reduction in the amount of stored electricity.

Next, as shown in the block diagram of FIG. 5, the electric charge generated by the rotating motion 14 of the rotor as the power generation means is 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 pointer 39 is protected by the pulse motor 38 by reducing the amount of electric storage. The hour hand 2 of the clock
0, the reference pulse generating means (O
SC) 35, time signal generating means 36, pulse motor driving means 37, and pulse motor 39 to reach hands 39 (hour hand 20, minute hand 21).

Further, the signal of the liquid crystal display panel driving circuit 75 is controlled by the information of the voltage detection circuit 31, the voltage waveform applied to the liquid crystal display panel 76 is controlled, and the display shown in FIG. 1 can be performed.

As is apparent from the above description, the adoption of a reflective polarizing plate for a liquid crystal display panel of a wristwatch device is as follows.
It is very effective due to the specialty of the wristwatch device.Furthermore, by controlling the reflectance and transmittance of the liquid crystal display panel using the reflective polarizing plate according to the amount of power generated by the power generation function element or the amount of electric storage, the wristwatch It is possible to display differently to reduce the decorativeness of the device, which can contribute to expanding the application range of the wristwatch device having the power generation function element.

Next, a second embodiment of the present invention will be described with reference to the drawings. In the second embodiment, a description will be given of a configuration in which a reflective polarizer is used for both polarizers constituting a liquid crystal display panel and a solar cell is used as a power generation function element. In addition, the ratio of the transmissive area of the liquid crystal display panel using the reflective polarizer to the transmissive area of the transmissive area and the reflective area of the transmissive area of the reflective liquid crystal panel is varied according to the intensity of the incident light on the solar cell and the magnitude of the electric storage amount. This is an embodiment in which the display of the power generation amount and the danger signal due to the decrease of the electric storage amount are performed, and the power generation amount of the solar cell is simultaneously controlled. Hereinafter, FIGS. 6 and 7
The second embodiment of the present invention will be described with reference to FIGS.

The watch case 11 has a windshield 12 and a back cover 19, and a time display unit includes a substrate 17, a secondary battery 18, and an hour hand 20 connected to the pointer shaft for driving the circuit board and the pointer shaft 74. And the minute hand 21. Further, the circuit board 1
7 has a solar cell 14 that converts light energy into electric energy as a power generating element.

The liquid crystal display panel has a windshield 12.
From the side, a reflective polarizer 72 as a first polarizer, a second substrate 54, and a second electrode 55 provided on the second substrate 54;
, Liquid crystal layer 59, first substrate 51, first electrode 52 provided on first substrate 51, first substrate 51, and second substrate 54
And a conductive particle 57 contained in the sealing material 58 and a reflective polarizing plate 73 as a second polarizing plate. In the center of the liquid crystal display panel, the pointer shaft hole 27 for penetrating the pointer shaft 74 is provided.
7 is reinforced by a sealing material 58.

Further, the first substrate 51 and the first electrode 52 and the second substrate 54 for aligning the liquid crystal layer 59 are processed.
An alignment film (not shown) is applied on the second electrode 55 and rubbed, and the liquid crystal layer 59 is twisted by 180 to 260 ° from the first substrate 51 to the second substrate 54. ,
A super twisted nematic (STN) type is used. Further, the first reflective polarizing plate 72 and the second reflective polarizing plate 73 are arranged so that both the polarization direction and the reflection direction are substantially 90 ° (perpendicular).

Further, on the first reflective polarizing plate 72, a sealing plate 58 for forming the liquid crystal display panel 76, a blind plate 71 for shielding a processing end and the like are provided. For example, by using a color polarizing plate as the blind plate 71, it is possible to display time in a rich color.

Further, the liquid crystal display panel 76 and the circuit board 1
In order to connect the zigzag 7, a zebra rubber 62 made of a laminate of conductive particles and an insulator is used.

Further, as shown in FIG. 6, the liquid crystal display panel 76 has pixels 77 and 78 which are divided into twelve pixels with the same number as the time twelve around the pointer shaft hole 27.
Furthermore, on the first reflective polarizing plate 72, numbers 79 from 1 to 12 representing time are printed.

Therefore, in the present embodiment, the ratio of the transmittance region of the liquid crystal display panel 76 is increased in order to increase the incidence of light on the solar cell 14 due to the decrease in the amount of stored electricity. Therefore, the transmission area is enlarged in the clockwise direction from the pixels 77 to 78. In addition, when the voltage applied to the liquid crystal display panel 76 is small, the transmittance of the liquid crystal display panel 76 is improved, so that the power consumption of the liquid crystal display panel 76 can be reduced and the transmittance of the liquid crystal display panel 76 can be increased. Become a very effective technology.

By forming an interference film on the surface of the solar cell 14, the transmittance of the liquid crystal display panel 76 can be improved even when the transmittance of the liquid crystal display panel 76 is increased. Become.

As is apparent from the above description, the adoption of the reflective polarizing plate for the liquid crystal display panel 76 of the wristwatch device is very effective due to the specialty of the wristwatch device. By controlling the reflectance and transmittance of the liquid crystal display panel 76 using a reflective polarizing plate according to the amount of stored electricity, the amount of stored electricity can be displayed without reducing the decorativeness of the wristwatch device. This makes it possible to contribute to expanding the application range of the wristwatch device having the power generation function element.

In the case of the solar cell 14 in particular, the amount of electric storage can be averaged by varying the intensity of light to the solar cell 14. Further, the liquid crystal display panel 76
By selecting the mode, the decorativeness, the display of the amount of stored electricity and the amount of generated power, the drive power of the liquid crystal display panel 76 can be reduced, and the intensity of light incident on the solar cell 14 can be improved.

When the solar cell 14 is employed as a power generation function element and a liquid crystal display panel 76 having a reflective polarizing plate is used, the solar cell is generally opaque, and light is Since light is required to be incident on the solar cell 14 using the transmission portion of the liquid crystal display panel 76 having a reflective polarizing plate, light that blocks light from the windshield to the solar cell is removed as much as possible. Is necessary. Therefore, in this embodiment, an auxiliary light source (not shown) used when using the wristwatch device in a dark environment.
Is disposed around the solar cell 14 between the liquid crystal display panel 76 having a reflective polarizing plate and the circuit board 17, and the solar cell 1
A method of using the reflection characteristics of the fourth and second reflective polarizers 73 to emit the light of the auxiliary light source to the observer side from the transmission part of the liquid crystal display panel 76 having the reflective polarizers was adopted. Arranging the second reflective polarizing plate 73 on the side facing the solar cell 14 is effective because the reflection characteristics of the reflective polarizing plate 73 can be used.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a schematic plan view for explaining an embodiment of a wristwatch device having a power generating function according to the present invention. FIG. 9 is a schematic cross-sectional view taken along line CC of FIG. In a third embodiment,
In order to increase the amount of character information, in order to adopt a matrix type liquid crystal display panel, the polarizing plate constituting the liquid crystal display panel, the second polarizing plate adopts a reflective polarizing plate, the first polarizing plate, Adopt absorption type polarizing plate. Further, a configuration utilizing thermoelectric power generation as a power generation functional element will be described. Also, the matrix type liquid crystal display panel is divided into upper and lower parts,
By stopping the display of one or both of the matrix type liquid crystal display panels depending on the amount of electricity stored in the thermal power generation,
The power consumption is reduced by reducing the electric storage amount. Further, in this embodiment, since a matrix type liquid crystal display panel is used, a digital time display unit for displaying time by characters or an analog time display unit for displaying time by hands is expressed by the liquid crystal display panel. It can be performed.

For this reason, the electrode arrangement of the matrix type liquid crystal display panel adopts an arrangement which spreads in a circular shape, and can be used as an analog time display section on one side of the upper and lower two divisions. In addition, it is possible to display one of the upper and lower sides of the matrix type liquid crystal display panel by reducing the power generation state of the thermoelectric power generation and the amount of electric storage. This will be described below with reference to FIGS.

The watch case 11 has a windshield 12 and a back cover 19, and a time display unit connects the circuit board 17, the secondary battery 18, the matrix type liquid crystal display panel 76, the liquid crystal display panel 76 and the substrate. And zebra rubber 62.
Time display is performed by a matrix type liquid crystal display panel 76. Further, a thermoelectric generator for converting thermal energy into electric energy is mounted on the circuit board 17 as a generator. The thermoelectric generator uses the difference between the body temperature of the user (observer) of the wristwatch device and the temperature of the environment of the wristwatch device as a temperature difference to generate thermoelectromotive force and generate power.

The matrix type liquid crystal display panel 76
From the windshield 12 side, an absorption type polarizing plate 72 as a first polarizing plate, a second substrate 54, a second electrode 55 provided on the second substrate 54, a liquid crystal layer 59 and a first substrate 51. And the first electrode 52 and the first electrode 5 provided on the first substrate 51
2, a switching element (not shown), a first substrate 51, and a sealing material 58 for holding the second substrate 54.
And conductive particles (not shown) included in the sealing material 58 and a reflective polarizing plate 73 as a second polarizing plate. In order to reduce the display quality and power consumption of the matrix type liquid crystal display panel 76, a switching element is employed.

Further, on the first substrate 51 and the first electrode 52 and the second substrate 54 for aligning the liquid crystal layer 59.
An alignment film (not shown) is applied on the second electrode 55 and rubbed, and the liquid crystal layer 59 is twisted by 90 ° from the first substrate 51 to the second substrate 54. Nematic (TN) type is used. Further, the first absorption-type polarizing plate 72 and the second reflection-type polarizing plate 73 are arranged to be substantially parallel to both the polarization direction and the reflection direction. That is, when the supply of power to the liquid crystal display panel 76 is stopped,
The liquid crystal display panel 76 includes the first absorption type polarizing plate 72 and the second absorption type polarizing plate 72.
The reflective polarizing plate 73 can display a metallic reflection characteristic.

Further, the first absorption type polarizing plate 72 is provided with a blind plate 71 for shielding the sealing material 58 constituting the liquid crystal display panel 76, a processing end and the like. For example, when a color polarizing plate is used for the blind plate 71 and a number indicating the time is described on the color polarizing plate, time display with rich colors can be performed.

Further, in order to connect the liquid crystal display panel and the circuit board 17, a zebra rubber 62 made of a laminate of conductive particles and an insulator is used. Since the electrode group (not shown) of the matrix type liquid crystal display panel 76 is vertically divided into two parts, the zebra rubber 62 is disposed on the circuit board 1 in three directions, that is, vertically and vertically.
7 is connected.

As a supplementary light source used when the wristwatch device is used in a dark environment, an electroluminescent lamp (EL) was used to reduce the thickness of the wristwatch device.
Further, a gap is provided between the EL and the second reflective polarizing plate 73, and when the auxiliary light source 80 is not lit, the display of the matrix type liquid crystal display panel 76 has a large binary contrast ratio between the reflective portion and the dark display. I decided to become. In FIG. 8, information is displayed in a first display area (upper side of the wristwatch device) 87 and a second display area 88 (lower side of the wristwatch device).
In order to reduce the amount of electricity stored, stop the full display,
This shows the situation with a reflective part.

Next, a fourth embodiment of the present invention will be described with reference to the drawings. The fourth embodiment relates to a wristwatch device using a plurality of liquid crystal display panels. A configuration in which the time display unit employs an analog type and uses a solar cell as a power generation function element will be described. In addition, when the ratio of a portion having a large transmittance of the liquid crystal display panel is increased due to a decrease in the amount of stored electricity, the structure also has an effect of preventing the surface of the solar cell from being seen. FIG.
A cross section similar to the schematic cross section taken along the line AA in FIG. 1 is shown, and the numbers in the drawings are used in the same manner for description. Hereinafter, a fourth embodiment of the present invention will be described with reference to FIG.

The watch case 11 has a windshield 12 and a back cover 19. The time display unit has an hour hand 20 connected to the circuit board 17, the secondary battery 18, and the pointer shaft for driving the circuit board and the pointer shaft 74. And the minute hand 21. Further, the circuit board 1
7 has a solar cell 14 that converts light energy into electric energy as a power generating element.

The liquid crystal display panel has a windshield 12.
From the side, a third substrate 82, a third electrode (not shown) provided on the third substrate 82, a second liquid crystal layer 85, a fourth substrate 84, which constitute a second liquid crystal display panel, Fourth electrode (not shown) provided on fourth substrate 84 and third substrate 8
The seal member 58 for holding the second and fourth substrates 84 and conductive particles (not shown) included in the seal member 58 are formed. The second liquid crystal layer 85 used for the second liquid crystal display panel 89 includes:
A polymer-dispersed liquid crystal display mode in which a polymer monomer was mixed with a liquid crystal and a polymer was formed using ultraviolet light was employed. In addition, the second liquid crystal display panel 89 has a mode in which when the supply of the voltage to the liquid crystal layer 58 is stopped, the liquid crystal layer 58 exhibits a scattering characteristic. The mode is scattered when no voltage is applied, and the transmittance is improved when the voltage is increased. It was adopted. This allows
When the amount of power generated by the solar cell is reduced or the amount of stored electricity is reduced, scattering is performed with the transmittance maintained, and the back cover 19 side can be shielded.

As the first liquid crystal display panel 76, a reflective polarizer 72 as a first polarizer, a second substrate 54, a second electrode 55 provided on the second substrate 54, and a liquid crystal layer 5.
9, a first substrate 51, a first electrode 52 provided on the first substrate 51, a sealing material 58 for holding the first substrate 51 and the second substrate 54, and conductive particles 57 included in the sealing material 58. And a reflective polarizing plate 73 as a second polarizing plate. In addition, since a pointer shaft hole 27 for penetrating the pointer shaft 74 is provided at the center between the first liquid crystal display panel 76 and the second liquid crystal display panel 89, a sealing material is provided around the pointer shaft hole 27. 58 for reinforcement.

Further, in order to perform an alignment treatment on the first liquid crystal layer 59, an alignment film (FIG. 10) is provided on the first substrate 51 and the first electrode 52, and on the second substrate 54 and the second electrode 55. (Not shown), and a rubbing process is performed.
A twisted nematic (TN) type that twists about 90 degrees from the first substrate to the second substrate 54 is used. Further, the first reflective polarizing plate 72 and the second reflective polarizing plate 73
The arrangement was such that both the polarization direction and the reflection direction were substantially 0 ° (parallel).

Further, on the first reflective polarizing plate 72, a sealing member 58 constituting the liquid crystal display panel 76, and a blind plate 71 for shielding a processed end and the like are provided. For example, by using a color polarizing plate as the blind plate 71, it is possible to display time in a rich color.

Further, the connection between the first liquid crystal display panel 76 and the circuit board 17 and the second liquid crystal display panel 89
Zebra rubbers 62 and 86 made of a laminate of conductive particles and an insulator are used for connection between the substrate and the circuit board 17.

In this embodiment, the ratio of the transmittance region of the first liquid crystal display panel 76 is increased in order to increase the incidence of light on the solar cell 14 due to the decrease in the amount of stored electricity. Further, the second liquid crystal display panel 89 is stopped to set the whole liquid crystal display mode. As described above, since the transmittance of the first liquid crystal display panel 76 is improved, the power consumption of the liquid crystal display panel 76 is reduced, and
Can be increased. Further, the pattern can be shielded by the scattering property of the second liquid crystal display panel 89.
The decorativeness of the watch device can be maintained.

As is clear from the above description, by using a plurality of liquid crystal display panels 76 and 89 for a wristwatch device, it is possible to adopt a reflective polarizing plate for the first liquid crystal display panel 76 of the wristwatch device. This is very effective due to the specialty of the wristwatch device, and further controls the reflectance and transmittance of the first liquid crystal display panel 76 using a reflective polarizing plate according to the amount of power generated by the power generation function element or the amount of electric storage. By doing
It is possible to display the amount of stored electricity without reducing the decorativeness of the wristwatch device, and further expand the application range of the wristwatch device having the power generation function element by introducing the shielding property of the second liquid crystal display panel 89. Can contribute to

In particular, in the case of the solar cell 14, the amount of electric storage can be averaged by changing the intensity of light to the solar cell 14. Further, the liquid crystal display panel 7
By selecting the mode of 6, the decorativeness, the display of the amount of electric storage and the amount of power generation, and the driving power of the liquid crystal display panel 76 are reduced,
In addition, the intensity of light incident on the solar cell 14 can be improved.

Next, a fifth embodiment of the present invention will be described with reference to the drawings. The fifth embodiment relates to a structure in which a liquid crystal display panel is arranged on a windshield side from a time display unit. FIG. 11 is a plan view of a wristwatch device showing a fifth embodiment, and FIG. 12 is a schematic cross-sectional view taken along line DD 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.

The watch case 11 has a windshield 12 and a back cover 19. From the windshield 12 side, as a liquid crystal display panel 76, a high transmittance absorption type polarizing plate 72 as a first polarizing plate, a second substrate 54, a second electrode 55 provided on the second substrate 54, and a liquid crystal layer 59. , A first substrate 51, a first electrode 52 provided on the first substrate 51, a sealing material 58 for holding the first substrate 51 and the second substrate 54, and conductive particles 57 contained in the sealing material 58 And a reflective polarizing plate 73 as a second polarizing plate. When the liquid crystal display panel 76 is adopted on the windshield side, if a reflective polarizer is used as the first polarizer, the reflectance is high, and the visibility of the time display unit on the back cover 19 side is reduced. Experiments show that it is better to use an absorption polarizer, and furthermore, it is important to improve the transmittance of the liquid crystal display panel and the colorlessness to improve the decorativeness of the wristwatch device. Was. for that reason,
In the present embodiment, an absorptive polarizing plate having a high transmittance is employed, and colorlessness in the visible region is emphasized.

Further, on the first substrate 51 and the first electrode 52 and the second substrate 54 for aligning the liquid crystal layer 59.
An alignment film (not shown) is applied and rubbed on the second electrode 55 and the second electrode 55, and the liquid crystal layer 59 is twisted by about 90 ° from the first substrate 51 to the second substrate 54. And a twisted nematic (TN) type. Further, the first absorption type polarizing plate 72 and the second reflection type polarizing plate 73 are arranged so that both the polarization direction and the reflection direction are substantially 90 ° (perpendicular).
The transparency was increased when no voltage was applied.

Further, since it is necessary to hold the liquid crystal display panel 76 on the hour hand 20 or the minute hand 21, the watch case 1
The liquid crystal display panel 76 is held from above and below by an upper presser 33 fixed to the watch holder 1 and a ring-shaped rubber packing 34, and is further fixed to the watch case 1 by a ring-shaped lower presser 90. Further, connection between the circuit section 17 and the liquid crystal display panel 76 is performed by the connector 35. A predetermined drive signal is applied to the liquid crystal display panel 76 by the connector 35. As shown in FIG. 11, a character display unit 88 for displaying a character can be provided on the time display unit, and the liquid crystal display panel 76 becomes transparent when no voltage is applied.

Further, on the back cover 19 side of the liquid crystal display panel 76, as a time display section, an hour hand 20 and a minute hand which are connected to the substrate 17, the secondary battery 18 and the pointer shaft for driving the circuit board and the pointer shaft 74. It becomes 21. Further, the circuit board 17 includes a solar cell 14 that converts light energy into electric energy as a power generation element. A white dial 16 is provided between the hour hand 20, the minute hand 21 and the solar cell 14 to shield the surface of the solar cell 14. White dial 1
6 was also made of ceramic having a high transmittance.

As described above, the hour hand 20 of the wristwatch device
LCD panel 76 on the side of windshield 12 above minute hand 21
Can be arranged and displayed, so that the recognizability of information is greatly improved. Further, the display is stopped due to the decrease in the battery storage amount, and the electric storage amount is reduced and the liquid crystal display panel 76 is stopped.
, The power generation efficiency of the solar cell 14 can be improved, and the oscillation of the crystal or the stop of the hour hand 20 or the minute hand 21 can be prevented.

Further, in this embodiment, by selecting the polarizing plate to be used, the first polarizing plate on the windshield side adopts a colorless absorption type polarizing plate having a high transmittance, and the second polarizing plate. Adopted a reflective polarizing plate in order to utilize the reflection characteristics for display. Therefore, the transmittance of the liquid crystal display panel was improved in order to improve the visibility of the display and the charging efficiency of the solar cell 14.

In the fifth embodiment, an embodiment using a solar cell as a power generation function element will be described. In order to improve the power generation efficiency of the solar cell due to a decrease in the amount of stored electricity, a windshield is provided. Adopted a method to improve the transmittance of the liquid crystal display panel provided, as a power generation function element, a power generation function element that converts kinetic energy to electrical energy,
Or, when converting heat energy into electric energy, it is possible to use the power generation function element to sense the usage status of the wristwatch device, so as to prevent the user from erroneously recognizing the time on the time display unit. It is possible to position the polarization axes of the first polarizing plate and the second polarizing plate at 0 ° (parallel) and employ means for reflecting the liquid crystal display panel when no voltage is applied, thereby shielding the time display section. In a wristwatch device having a power generation function element, it is very effective.

In the fourth embodiment, a TN type using a polarizing plate is used as the first liquid crystal display panel 76, and a polymer scattering type liquid crystal display device is used as the second liquid crystal display panel 89. Further, even when a plurality of liquid crystal display panels are used to perform complicated display, or when a guest-host type liquid crystal display device including a dichroic dye is used for the second liquid crystal display panel, the reflection of the present invention is also possible. An effective wristwatch device can be manufactured by adopting a configuration having at least a liquid crystal display panel using a mold-type polarizing plate and a power generation function element.

[0089]

As is apparent from the above description, the structure of the present invention, that is, the reflection type polarizing plate is adopted for the liquid crystal display panel, and the ratio between the reflectance and the transmittance of the liquid crystal display panel is controlled.
Impair the decorativeness of the watch by providing a function to shield members with a power generation function and a warning on the windshield or back cover side of the time display section to warn of an abnormality in the amount of power generation or accumulated charge. Therefore, the effectiveness of the wristwatch having the power generation function can be more economically improved.

Further, a liquid crystal display panel is arranged on the side of the windshield 12. Alternatively, by using a liquid crystal display panel having a plurality of panels, it is possible to shield the time display unit due to a decrease in the amount of stored electricity, improve display quality, or display the amount of power generation of the power generation function element, or control the amount of power generation. Become.
Further, by using the power generation function element as a sensor of the environment of the wristwatch device and connecting the information of the sensor and the liquid crystal display panel in a circuit, a more effective function as a wristwatch device can be provided.

Further, the liquid crystal display panel can be arranged on the solar cell, the transmittance of the liquid crystal display panel can be changed, and the power generation of the solar cell can be controlled. Furthermore, by providing a region having a difference in the display capacity of the liquid crystal display panel, and referring to the storage amount of the secondary battery and the power consumption of the display, and adopting a method of limiting the display region, the operation time of the hour hand and the minute hand is 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, the present embodiment is effective in the case of a wristwatch device having a large capacity liquid crystal display panel and consuming a large amount of power. . Furthermore, even when the secondary battery in the wristwatch device is charged from outside, not from the wristwatch device itself, it is effective to use the embodiment of the present invention according to the amount of electricity stored in the secondary battery. .

[Brief description of the drawings]

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

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

FIG. 3 is a sectional view showing a sectional structure of the liquid crystal display panel according to the first embodiment of the present invention.

FIG. 4 is a graph showing voltage dependence of transmittance and reflectance of a liquid crystal display panel using a reflective polarizing plate used in an embodiment of the present invention.

FIG. 5 is a block circuit diagram showing a circuit configuration used in an embodiment of the present invention.

FIG. 6 is a plan view showing a plan configuration of a wristwatch according to a second embodiment of the present invention.

FIG. 7 is a sectional view showing a sectional structure of a wristwatch device according to a second embodiment of the present invention.

FIG. 8 is a plan view showing a sectional structure of a wristwatch device according to a third embodiment of the present invention.

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

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

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

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

FIG. 13 is a plan view showing a plan configuration of a wristwatch device according to the related art.

FIG. 14 is a plan view showing a cross-sectional 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) 16 date plate 17 circuit section 18 secondary battery 20 hour hand 21 minute hand 22 dial opening 62 zebra rubber 76 liquid crystal display panel 72 first polarizing plate (reflection Type polarizing plate) 73 second polarizing plate (reflective polarizing plate) 77, 78 pixels 87 first display area 88 second display area

Claims (9)

[Claims] 1. 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 and a time display section, wherein the watch display section forms an upper portion, a lower portion, or a part of the time display portion. And a reflection type polarizing plate disposed in a portion to be reflected. Further, depending on the power generation state or electric capacity, light from the observer side or light from the side opposite to the observer side can easily pass through the reflection type polarizing plate. A wristwatch device having a power generation function, comprising: a light modulation function unit that varies a ratio between an axis and an easy reflection axis, and displays a power generation state or an electric capacity. 2. 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 time display unit, wherein the wristwatch device has an upper portion, a lower portion, or a part of the time display portion. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, which is disposed at a portion where the first polarizing plate or the second polarizing plate is provided. One of the two polarizers is a reflective polarizer, and further controls the voltage applied to the liquid crystal display panel according to the power generation state or electric capacity, and controls light from the observer side or from the side opposite to the observer side. A wristwatch device having a power generation function, characterized in that the transmittance and the reflectance of the liquid crystal display panel are varied with respect to the above light, and the power generation state or the electric capacity is displayed. 3. 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 time display unit, wherein an upper part or a lower part of the time display unit or a part of the time display unit is formed. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, which is disposed at a portion where the first polarizing plate or the second polarizing plate is provided. One of the two polarizers is a reflective polarizer, and further controls the voltage applied to the liquid crystal display panel according to the power generation state or electric capacity, and controls light from the observer side or from the side opposite to the observer side. A wristwatch device having a power generation function, wherein the ratio of the transmission part to the reflection part of the liquid crystal display panel is varied with respect to the light of the above, and the power generation state or the electric capacity is displayed. 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 and a time display unit, wherein an upper part or a lower part of the time display unit or a part of the time display unit is formed. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, which is disposed at a portion where the first polarizing plate or the second polarizing plate is provided. One of the two polarizers is a reflective polarizer, and further controls the voltage applied to the liquid crystal display panel according to the power generation state or electric capacity, and controls light from the observer side or from the side opposite to the observer side. A wristwatch device having a power generation function, characterized in that the ratio of the transmissive part to the reflective part of the liquid crystal display panel with respect to the light is changed to open or block information on the back cover side of the liquid crystal display panel. 5. A wristwatch device having a function of generating electricity by a solar cell or a temperature difference or a rotating motion of a rotor, comprising: a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second electrode for applying a voltage. And a liquid crystal display panel comprising at least one of the first polarizing plate and the second polarizing plate is formed of a reflective polarizing plate, and displays power generation or electric capacity. And the liquid crystal display panel has
A function of being arranged on the windshield side with respect to the time display unit of the wristwatch device, detecting a decrease in the amount of power generation or a decrease in the electric capacity by the circuit unit, and applying a decrease signal of the electric capacity to the liquid crystal display panel from the circuit unit. The display of the part other than the application part of the drop signal is stopped by the circuit part,
Alternatively, a wristwatch device having a power generation function, which is a reflection portion. 6. A wristwatch device having a function of generating electricity by a solar cell or a temperature difference or a rotating motion of a rotor, comprising: a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second electrode for applying a voltage. And a liquid crystal display panel comprising at least one of the first polarizing plate and the second polarizing plate is formed of a reflective polarizing plate, and displays power generation or electric capacity. The liquid crystal display panel is disposed on the back cover side of the time display unit of the wristwatch device, a decrease in the amount of power generation or a decrease in the electric capacity is detected by the circuit unit, and a signal of a decrease in the electric capacity is sent from the circuit unit to the liquid crystal display panel. A wristwatch device having a power generation function, comprising: a function of applying a voltage signal; and a circuit unit, the display of a portion other than the application unit of the drop signal is stopped, and the liquid crystal display panel is used as a transmission unit or a reflection unit. 7. A wristwatch device having a function of generating electricity by a solar cell and a time display unit, wherein the watch device is disposed at an upper portion or a lower portion of the time display portion, or a portion constituting a part of the time display portion. A liquid crystal display panel including a polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, and at least one of the first polarizing plate and the second polarizing plate is reflective. It controls the voltage applied to the liquid crystal display panel according to the power generation status or electric capacity, and changes the ratio of the transmission part and the reflection part of the liquid crystal display panel to the light from the observer side. A wristwatch device having a power generation function, wherein the intensity of light incident on a solar cell is varied. 8. 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 time display unit, wherein the wristwatch device has an upper portion, a lower portion, or a part of the time display portion. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, which is disposed at a portion where the first polarizing plate or the second polarizing plate is provided. One of the polarizers consists of a reflective polarizer,
Further, a plurality of liquid crystal display panels perform gradation display, color display, or positive / negative display, and a circuit unit detects a decrease in the amount of power generation or electric capacity, and a plurality of liquid crystal displays are displayed by the decrease in electric capacity. A wristwatch device having a power generation function, characterized in that the wristwatch device has a liquid crystal display panel that reduces the number of driven panels and enables the liquid crystal display panel to display a reduction in the amount of power generation or a reduction in electric capacity. 9. 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 time display unit, wherein the watch display unit has an upper portion, a lower portion, or a part of the time display portion. A liquid crystal display panel including a first polarizing plate, a substrate for holding a liquid crystal layer, an electrode for applying a voltage, and a second polarizing plate, which is disposed at a portion where the first polarizing plate or the second polarizing plate is provided. One of the two polarizers is a reflective polarizer, and further detects an abnormality of the time display unit due to a shortage of electric capacity or an insufficient amount of power generation by a circuit unit, and the transmission unit and the reflection unit of the liquid crystal display panel are detected. A wristwatch device having a power generation function, characterized in that the wristwatch device has a function of displaying the abnormality of the time display unit or shielding the time display unit by changing the ratio of the time display unit.