JP2001108771A - Timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a timepiece capable of providing a display varied in design. SOLUTION: This timepiece is equipped with a liquid crystal display panel for displaying at least time-of-day information or calendar information. In a liquid-crystal cell made by putting liquid crystal between two transparent substrates each having an electrode on their inner surfaces confronting each other, a polarizing sheet is disposed outside each substrate, and a light absorbing plate is disposed across one polarizing sheet from the cell. As the polarizing sheet, a sheet is used reflecting linearly polarized light having a vibration surface making a right angle with an easy-transmission axis. A background part and one of display segment parts are displayed in a metallic color and the other thereof in the same color as the absorbing plate has.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clock for displaying at least one of time information such as hours, minutes, and seconds and calendar information such as dates, days, months, and years using a liquid crystal display panel. In addition to a clock that digitally displays time and calendar information, a combination clock with an analog type that displays time information with hands, a dial on the LCD display panel, and pseudo-display of hands such as the hour hand, minute hand, and second hand It also includes analog clocks that do.

[0002]

2. Description of the Related Art A clock that digitally displays time information such as hours, minutes, and seconds and calendar information such as date, day of the week, month, and year using a liquid crystal display panel has conventionally been provided with a crystal oscillation circuit. It is frequently used in watches and clocks. There is also a combination clock that combines an analog display in which time information is displayed with hands and a digital display in which time information and calendar information are displayed by numbers and characters.

Further, there has been proposed an analog timepiece in which a dial is constituted by a liquid crystal display panel to selectively display various scale patterns, or to simulately display hands such as an hour hand, a minute hand and a second hand. (See, for example,
No. 153066). In such a watch,
2. Description of the Related Art A conventional liquid crystal display panel for displaying time information, calendar information, and the like has two electrodes each having an inner surface facing each other.
An upper polarizing plate and a lower polarizing plate are arranged on both sides of a liquid crystal cell in which liquid crystal is sealed between two transparent substrates. When a voltage is applied between the electrodes of the pair of substrates of the liquid crystal cell and an electric field is applied, the optical characteristics of the liquid crystal change, and the transmission and absorption of light incident on the liquid crystal display panel are partially controlled to a predetermined value. Is displayed.

The upper polarizing plate and the lower polarizing plate are both polarizing plates that absorb linearly polarized light having a vibration plane perpendicular to the axis of easy transmission. In such a timepiece using a conventional liquid crystal display panel, in a general normally white mode, time information and calendar information are displayed in black on a white background.

[0005]

However, simply displaying the time information and calendar information in black on a white background as described above does not change the design, lacks an interesting taste, and makes consumers tired. . For this reason, the consumption of digital display clocks has been declining in recent years. Also, combination clocks have not become very popular, and analog display clocks using liquid crystal display panels have not become widespread. The present invention has been made in view of such a situation, and an object of the present invention is to provide a timepiece capable of digital display or analog display with a design change using a liquid crystal display panel.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a timepiece having a dot matrix type liquid crystal display panel for displaying at least one of time information and calendar information. The configuration is as follows. 2 each having electrodes on opposing inner surfaces
A polarizing plate is arranged on the viewing side of a liquid crystal cell in which liquid crystal is sealed between two transparent substrates, a polarizing sheet is arranged on the side opposite to the viewing side, and a light absorbing plate is arranged on the side of the polarizing sheet opposite to the liquid crystal cell. .

As the polarizing plate, a polarizing plate that absorbs linearly polarized light having a vibration plane perpendicular to the easy transmission axis is used. As the polarizing sheet, linearly polarized light having a vibration plane perpendicular to the easy transmission axis is reflected. (A reflective polarizing sheet or a polarizing plate) is used. The thus configured timepiece according to the present invention can perform metallic display by controlling whether to reflect or absorb half of the incident light from the viewing side (upper side) of the liquid crystal display panel. And
The metal feeling (gloss) of the entire display section can be suppressed, the display can be easily viewed, and the viewing angle characteristics can be improved.

[0008] The easy transmission axis of the polarizing plate disposed on the viewing side of the liquid crystal cell is determined by making the transmission axes of the polarizing plate and the polarizing sheet on both sides of the liquid crystal cell orthogonal or parallel, or by setting the easy transmission axis of the polarizing plate disposed on the viewing side of the liquid crystal cell. Depending on whether the molecules are aligned or orthogonal to the long axis direction, or depending on the type of liquid crystal or voltage application, either the background part or the display segment part is the metal color due to the reflection of the polarizing sheet, and the other is the color of the light absorbing plate. Can be displayed.

For example, a polarizing plate and a polarizing sheet arranged vertically above and below a liquid crystal cell are arranged such that each easy axis of transmission is parallel to each other, and a liquid crystal cell filled with a twisted nematic liquid crystal having a twist angle of 90 degrees is used. Then, half of the light incident from the viewing side (upper side) of the liquid crystal cell is absorbed by the upper polarizing sheet. The other half is transmitted through the liquid crystal cell, but the transmitted light is rotated by 90 degrees in the background where no voltage is applied to the liquid crystal of the liquid crystal cell. Therefore, the vibration plane orthogonal to the easy transmission axis of the lower polarizing sheet is provided. And is reflected by the lower polarizing sheet. Therefore, the background portion is displayed in a metal color (mirror shape).

On the other hand, since a voltage is applied to the liquid crystal in the segment portion for displaying the time information and calendar information of the liquid crystal cell, the light passing through the liquid crystal cell is not rotated, and the light passing through the easy axis of the lower polarizing sheet is not rotated. Since the light becomes linearly polarized light having a vibration plane in the same direction, it passes through the lower polarizing sheet and is absorbed by the light absorbing plate. Therefore, although the display segment is displayed in black, if a colored light absorbing plate is used, only light of a specific color is reflected, and the light is reflected on the lower polarizing sheet, the liquid crystal cell, and the upper side. The light passes through the polarizing sheet in the opposite direction and exits to the viewing side, and is displayed in the color of the light absorbing plate. However, since half of the incident light is absorbed by the upper polarizing plate, the metal tone of the liquid crystal display panel is suppressed, and the display is easy to see.

As described above, the display can be inverted so that the background portion is displayed in the color of the light absorbing plate and the display segment portion is displayed in the metal color. For this reason, in comparison with a conventional timepiece that displays time information and calendar information in black on a white background, the timepiece according to the present invention can display fresh and changing time information and calendar information, and the design is changed. And it has some interesting taste.

In the timepiece according to the present invention, a backlight can be displayed at night or in a dark place by arranging a backlight in place of the light absorbing plate. If a semi-transmissive absorbing plate is provided between the backlight and the polarizing sheet adjacent to the backlight, the transmissive display by the backlight and the reflective display by the external light can be easily viewed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a timepiece according to the present invention will be described below with reference to the drawings. First, an example of the appearance of a digital display type quartz timepiece embodying the present invention and its internal structure will be described with reference to FIGS. FIG. 1 is a perspective view showing the appearance of the quartz timepiece, and FIG. 2 is a sectional view showing the internal structure thereof.

The timepiece case 20 of the quartz timepiece is formed by joining a windshield 22 and a back cover 23 to a metal body 21. The windshield 22 is made of a transparent material such as sapphire glass, tempered glass, or a resin material, and is fitted to and joined to the front side of the body 21 via bonding or packing. The back cover 23 is fitted and joined to the back side of the body 21 via screwing or packing.

As described above, the inside of the watch case 20 has an airtight structure so that dust and moisture do not enter.
A liquid crystal display panel (liquid crystal display) 10 is provided on the windshield 22 side of the watch case 20 as a display unit for displaying time and the like. This liquid crystal display panel 10 includes:
There are a time display section 10a for displaying hours, minutes, and seconds, a calendar display section 10b for displaying months, days, and days of the week, and a colon mark display section 10c that blinks every second.

The normal time display function of 12 hours or 24 hours, alarm function, stopwatch function,
The display of a timer function etc. is enabled. The switching of the display function and the time correction are performed by the body 21 of the watch case 20.
The operation is performed by operating a plurality of operation switches 24 provided in the above. The operation switch 24 is provided with a packing between the operation switch 24 and the body 21 so that dust and moisture do not enter the inside of the watch case 20.

As shown in FIG. 2, the liquid crystal display panel 10 and the circuit board 30 are arranged substantially in parallel in the watch case 20 inside the quartz timepiece.
A battery 31 serving as a driving power source is disposed on the side. On the circuit board 30, a crystal oscillator 32 having an oscillation frequency of 32,768 Hz, a crystal oscillation circuit or a frequency dividing circuit that oscillates the crystal oscillator to generate a predetermined signal, and a liquid crystal display panel 10 are driven. And a semiconductor integrated circuit 33 equipped with a central processing unit (CPU) for integrally controlling the quartz clock.

The liquid crystal display panel 10 and the circuit board 30
They are electrically connected by a zebra rubber 34 disposed therebetween. Then, the liquid crystal display panel 10 and the circuit board 3
The zebra rubber 34 is configured to be compressed in its thickness direction in order to ensure electrical connection with the zero. The zebra rubber 34 is formed by forming conductive layers containing carbon or metal particles in silicon rubber, which is an insulator, at a constant pitch. Is in an insulated state. The connection terminal patterns are formed on the opposing surfaces of the liquid crystal display panel 10 and the circuit board 30 at the same pitch so as to correspond to the vertical conductive portions and the insulating portions formed by the conductive layers of the zebra rubber 34 being alternately arranged. Are formed.

The structure of the liquid crystal display panel 10 will be described below in detail with reference to FIGS. FIG. 3 is a schematic cross-sectional view for explaining a configuration example of the liquid crystal display panel 10, in which the distance between layers is enlarged. This liquid crystal display panel 10 is, as shown in FIG.
1, a first polarizing sheet 12 disposed on the upper surface side thereof,
Second polarizing sheet 13 arranged on the lower surface side of liquid crystal cell 11
And a light absorbing plate 14 provided therebelow.

The liquid crystal cell 11 is sealed with a sealing material 4 so as to confine the liquid crystal 3 between the two glass substrates 1 and 2 as shown in FIG. 4, and the liquid crystal 3 has a twist angle of 90 degrees or less. Twisted nematic (TN) is used. Then, transparent electrodes 5 and 6 made of indium tin oxide (ITO) are formed on the surfaces of the two glass substrates 1 and 2 on the side in contact with the liquid crystal 3, respectively.
An alignment process is performed so that the liquid crystal molecules are aligned in a predetermined direction.

Then, by applying a voltage between the electrodes 5 and 6, the orientation of the liquid crystal 3 between the electrodes 5 and 6 is changed, and time information and calendar information are digitally displayed. The first polarizing sheet 12 and the second polarizing sheet 13 arranged vertically above and below the liquid crystal cell 11 are arranged such that their easy axes of transmission are parallel.

Then, the first polarizing sheet 12 and the second
Are polarizing sheets (reflection-type polarizing sheets) that reflect linearly polarized light having a vibration plane orthogonal to the easy transmission axis. As the first polarizing sheet 12 and the second polarizing sheet 13, for example, an optical film DBEF (trade name) manufactured by Sumitomo 3M Limited is used. Such a reflective polarizing element has been developed by the Minnesota Mining and Manufacturing Company of the United States and is disclosed in Japanese Patent Publication No. 9-507308 (International Publication No. WO95 / 17691) and Japanese Patent Publication No. 9-511844 (International Publication No. Publication number: WO95 / 2
7919).

According to the quartz timepiece of this embodiment, half of the light incident from above the liquid crystal display panel 10 in FIG. 3 is reflected by the first polarizing sheet 12 and half is transmitted. Then, in the background portion displaying the time information and calendar information, since no voltage is applied to the liquid crystal 3 of the liquid crystal cell 11, half of the transmitted light is rotated by 90 degrees when transmitted through the liquid crystal cell 11, and the second light is rotated. Since the light becomes a linearly polarized light having a vibration plane orthogonal to the axis of easy transmission of the polarizing sheet 13, the light is reflected by the second polarizing sheet 13.

Therefore, in the background portion of the information display, almost all of the incident light is reflected, and the display is in a metal color (mirror shape). In the display segment portion to which the voltage of the liquid crystal cell 11 for digitally displaying the time information and calendar information is applied, the light transmitted through the first polarizing sheet 12 is not rotated when transmitted through the liquid crystal cell 11, and the second rotation is not performed. Since the light becomes linearly polarized light having a vibration plane in the same direction as the easy transmission axis of the polarizing sheet 13, the second polarizing sheet 13
And is absorbed by the light absorbing plate 14, so that the image is displayed in black.

If the light absorbing plate 14 is colored so as to reflect only a light component of a specific wavelength,
Digital display of time information and calendar information can be performed in any color. As a result, the timepiece according to the present invention can perform digital display in an arbitrary color on a metal-tone background as compared with a conventional digital display type clock that digitally displays time information and calendar information in black display on a white background. The design can be changed and the taste can be increased.

Further, the first polarizing sheet 12 and the second polarizing sheet 13 arranged vertically above and below the liquid crystal cell 11 are
If the easy-to-transmit axes are arranged so as to be perpendicular to each other so as to match the twist angle of the liquid crystal 3, the brightness of the background portion and the display segment portion are inverted, and digital display can be performed in a metal color. Further, the light absorbing plate 14 in FIG. 3 is omitted, and the display segment portion or the background portion through which half of the incident light is transmitted becomes transparent, so that the internal structure of the timepiece such as the circuit board 30 shown in FIG. 2 can be seen. You can also.

It is to be noted that such a liquid crystal display panel is a liquid crystal display panel of a dot matrix display, or that a large number of pointer patterns are formed at slightly different angles so that the hands such as an hour hand, a minute hand and a second hand are simulated. It is also possible to configure an analog display type timepiece that displays a graphic image on the display.

Further, only the calendar information is digitally displayed, and the time information is displayed in an analog manner by the hands. Only the time information is displayed, and other displays for various functions such as an alarm and a stopwatch are added. It is of course possible to do so. Although the example in which the liquid crystal sealed in the liquid crystal cell 11 is a twisted nematic (TN) liquid crystal has been described, the super twisted nematic (STN) liquid crystal is used.
Liquid crystal or cholesteric liquid crystal can be used.

Next, another configuration example of the liquid crystal display panel used in the timepiece of the present invention will be described with reference to FIGS. These figures are schematic cross-sectional views similar to FIG. 3 showing different configuration examples of the liquid crystal display panel used in the present invention, and the same parts as those in FIG. Is omitted.

The liquid crystal display panel shown in FIG. 5 has, similarly to the liquid crystal display panel 10 shown in FIG. , But a backlight 15 is provided below the second polarizing sheet 13 instead of the light absorbing plate 14. As the backlight 15, an electroluminescence (EL) element, a light emitting diode (LED) element, a cold cathode tube, a hot cathode tube, or the like is used.

The display function of this liquid crystal display panel using external light is the same as that of the liquid crystal display panel 10 described above.
The light transmitting portion is displayed in the color of the surface of the backlight 15 instead of being displayed in the color of the light absorbing plate 14. Further, if the backlight 15 is caused to emit light when the external light is insufficient, the light is emitted to the viewing side (upward in FIG. 5) through the light transmitting portion, so that either the display segment portion or the background portion is backlighted. It is displayed brightly with 15 emission colors.

Therefore, the backlight 15 has red, green,
Various color displays can be performed by using a color light emitting device such as a yellow light emitting device or a combination of a white light emitting device and a color filter. Even when this liquid crystal display panel is used, timepieces of various display forms can be realized as in the above-described example.

The liquid crystal display panel shown in FIG. 6 has a transflective plate 1 between a backlight 15 and a second polarizing sheet 13 adjacent thereto in the liquid crystal display panel shown in FIG.
6 is provided. In this way, the display of the reflection type by the external light is displayed in the color of the semi-transmissive absorption plate 16 so as to be easily seen. The transmissive display by the backlight is also soft and easy to see because light emitted by the backlight 15 is attenuated when transmitted through the transflective plate 16.

The liquid crystal display panel shown in FIG. 7 has a configuration in which a polarizing plate 17 is arranged above the first polarizing sheet 12 of the liquid crystal display panel 10 shown in FIG. This polarizing plate 17
The linearly polarized light having a vibration plane orthogonal to the easy transmission axis is a normal absorption type polarizing plate that absorbs the light, and the direction of the easy transmission axis is made to substantially coincide with the direction of the easy transmission axis of the first polarizing sheet 12. Deploy.

According to the liquid crystal display panel 10, half of the incident external light is absorbed by the polarizing plate 17, and the other half is formed on the first polarizing sheet 12 by a straight line having a vibration plane in the same direction as the easy transmission axis. Since the light enters as polarized light, the light passes through the first polarizing sheet 12 and enters the liquid crystal cell 11. Other functions are the same as those of the liquid crystal display panel 10 of FIG. 3. The incident light of the portion rotated by 90 degrees in the liquid crystal cell 11 is reflected by the second polarizing sheet 13 and is displayed in a metal color. The incident light of the unrotated portion is absorbed by the light absorbing plate 14 and is displayed in the color of the light absorbing plate 14.

In this case, the display is somewhat dark because the reflected light on the entire surface by the first polarizing sheet 12 is almost eliminated.
The metal feeling (gloss) of the entire display section can be suppressed, the display can be easily viewed, and the viewing angle characteristics can be improved. As the polarizing plate 17, a color polarizing plate that mainly absorbs light of a specific wavelength among linearly polarized light having a vibration plane orthogonal to the easy transmission axis may be used. Then, the metal feeling (glossy) of the entire display section can be suppressed, the display can be easily viewed, and the viewing angle characteristics can be improved without significantly lowering the brightness of the display.

The light absorbing plate 14 in this liquid crystal display panel
Instead, a backlight 15 similar to the liquid crystal display panel shown in FIG. 5 may be provided, or a semi-transmissive absorption plate 16 and a backlight 15 may be provided similarly to the liquid crystal display panel shown in FIG. You may. Alternatively, all of them may be omitted so that the internal structure of the timepiece can be seen in the transparent part.

The liquid crystal display panel shown in FIG. 8 has a structure in which a light diffusion sheet 18 is provided as a light diffusion layer above the first polarizing sheet 12 of the liquid crystal display panel 10 shown in FIG. The light diffusion sheet 18 may be formed by embossing the surface of a transparent base film or by dispersing light scattering particles in the base film.
Further, instead of providing the light diffusion sheet 18 alone, a light diffusion layer may be applied to the upper surface of the first polarizing sheet 12 or a light diffusion film may be bonded.

Even in this case, the first polarizing sheet 12
The light reflected on the entire surface is diffused to suppress the metal feeling, a soft display can be achieved, and the viewing angle characteristics are also improved.
However, the contrast of the display is slightly reduced. Also in this liquid crystal display panel, a backlight 15 similar to the liquid crystal display panel shown in FIG. 5 may be provided instead of the light absorbing plate 14, and similarly to the liquid crystal display panel shown in FIG.
The transflective plate 16 and the backlight 15 may be provided. Alternatively, all of them may be omitted so that the internal structure of the timepiece can be seen in the transparent part.

The liquid crystal display panel shown in FIG. 9 differs from the liquid crystal display panel 10 shown in FIG. 3 in that, instead of the first polarizing sheet 12, the absorption type polarizing plate 17 shown in FIG. Is arranged. The polarizing plate 17 is
It is desirable that the axis of easy transmission be arranged so as to be parallel or perpendicular to the axis of easy transmission of the second polarizing sheet 13. This liquid crystal display panel also
The display function equivalent to the liquid crystal display panel 10 shown in FIG.

The liquid crystal display panel shown in FIG. 10 is different from the liquid crystal display panel shown in FIG. 9 in that a semi-transmissive absorption plate 16 and a backlight 15 are provided instead of the light absorption plate 14. The display functions of the respective liquid crystal display panels shown in FIG. In the liquid crystal display panel shown in FIG. 10, the transflective absorbing plate 16 can be omitted, or both the transflective absorbing plate 16 and the backlight 15 can be omitted so that the internal structure of the timepiece can be seen in the transparent part. You may.

[0042]

According to the present invention, the display of time information, calendar information, and the like on the liquid crystal display panel can be performed using various colors of the metal color and black or the light absorbing plate, or the emission color of the backlight. Therefore, it is possible to bring about a change in the design of a wristwatch or a table clock, and it is possible to provide a digital display, an analog display, or a combination display that is colorful and has an interesting taste.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of the appearance of a digital display type quartz timepiece embodying the present invention.

FIG. 2 is a sectional view showing the internal structure.

FIG. 3 is a schematic cross-sectional view for explaining a configuration example of a liquid crystal display panel used for a timepiece according to the present invention.

FIG. 4 is an enlarged sectional view showing a configuration of the liquid crystal cell.

FIG. 5 is a schematic sectional view similar to FIG. 3 for explaining another different configuration example of the liquid crystal display panel used in the timepiece according to the present invention.

FIG. 6 is a schematic cross-sectional view similar to FIG. 3 for explaining still another configuration example of the liquid crystal display panel used in the timepiece according to the present invention.

FIG. 7 is a schematic cross-sectional view similar to FIG. 3 for explaining still another configuration example of the liquid crystal display panel used in the timepiece according to the present invention.

FIG. 8 is a schematic cross-sectional view similar to FIG. 3 for explaining still another configuration example of the liquid crystal display panel used in the timepiece according to the present invention.

FIG. 9 is a schematic cross-sectional view similar to FIG. 3 for explaining still another configuration example of the liquid crystal display panel used in the timepiece according to the present invention.

FIG. 10 is a schematic cross-sectional view similar to FIG. 3 for explaining still another configuration example of the liquid crystal display panel used in the timepiece according to the present invention.

[Explanation of symbols]

 1, 2: glass substrate 3: liquid crystal 4: sealing material 5, 6: electrode 10: liquid crystal display panel 10a: time display section 10b: calendar display section 10c: mark display section 11: liquid crystal cell 12: first polarizing sheet 13 : Second polarizing sheet 14: light absorbing plate 15: backlight 16: semi-transmissive absorbing plate 17: polarizing plate 18: light diffusing sheet 20: watch case 21: body 22: windshield 23: back cover 24: operation switch 30: circuit board 31: battery 32: crystal oscillator 33: crystal oscillator 34: zebra rubber

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09F 9/00 362 G09F 9/30 349E 9/30 349 349Z G04G 9/00 308B // G04G 9/00 308 G02F 1/1335 530 (72) Inventor Kintaka Sekiguchi 840 Takeno, Shimotomi, Tokorozawa-shi, Saitama Citizen Watch Co., Ltd. (72) Inventor Masami Kikuchi 840 Takeno, Shimotomi, Tokorozawa-shi, Saitama Citizen Watch Co., Ltd.Technical Research Laboratory (72) Inventor Yuichi Akiba 840 Taketomo, Shimotomi, Tokorozawa-shi, Saitama Citizen Watch Co., Ltd. 840 Citizen Watch Co., Ltd.Technology Research Institute (72) Inventor Takashi Toida Ojiro, Tokorozawa, Saitama Wealth character Takeno 840 address Shea Chizun watch Co., Ltd. Tokorozawa plant

Claims (3)

[Claims] 1. A timepiece including a liquid crystal display panel of a dot matrix display for displaying at least one of time information and calendar information, wherein the liquid crystal display panel has two transparent electrodes each having an electrode on an opposing inner surface. A liquid crystal cell in which liquid crystal is sealed between substrates, a polarizing plate disposed on the viewing side of the liquid crystal cell, a polarizing sheet disposed on the side opposite to the viewing side of the liquid crystal cell, and a polarizing sheet opposite to the liquid crystal cell. A light absorbing plate disposed on the side, the polarizing plate is a polarizing plate that absorbs linearly polarized light having a vibration plane orthogonal to the easy transmission axis, and the polarizing sheet has a vibration plane perpendicular to the easy transmission axis. A watch characterized by having a sheet that reflects linearly polarized light. 2. A timepiece provided with a liquid crystal display panel of a dot matrix display for displaying at least one of time information and calendar information, wherein the liquid crystal display panel has two transparent electrodes each having an electrode on an opposing inner surface. A liquid crystal cell in which liquid crystal is sealed between substrates, a polarizing plate disposed on the viewing side of the liquid crystal cell, a polarizing sheet disposed on the side opposite to the viewing side of the liquid crystal cell, and a polarizing sheet opposite to the liquid crystal cell. A polarizing plate that absorbs linearly polarized light having a vibration plane perpendicular to the easy transmission axis, and the polarizing sheet has a vibration plane perpendicular to the easy transmission axis. A watch characterized by a sheet that reflects linearly polarized light. 3. The timepiece according to claim 1, wherein a semi-transmissive absorption plate is provided between the backlight and the polarizing sheet.