JP2006275803A - Electronic timepiece, electronic timepiece hand position detection control method, electronic timepiece hand position detection program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic timepiece capable of detecting surely a position of a hand without impairing an appearance, a hand position detection control method for the electronic timepiece, a hand position detection program, and a recording medium. <P>SOLUTION: A light emitting device and a photoreceiver for a hand position detector 8 are arranged in a reverse face side of a translucent dial 5. Specular parts 611, 621, 631 are formed in a reverse face side of the hand 6. Light emitted from the light emitting device is transmitted through the dial 5, is reflected by the specular parts 611, 621, 631, and is received by the photoreceiver. Since the dial 5 is translucent, the hand position detector 8 can be arranged in the reverse face side of the dial 5 not to impair the appearance of a radio-controlled timepiece 1. The light from the light emitting device is transmitted through the dial 5, because the dial 5 is translucent, to detect surely the position of the hand 6, even when the hand position detector 8 is arranged in the reverse face side of the dial 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic timepiece having a hand position detection function for detecting the position of a pointer, a hand position detection control method for the electronic timepiece, a hand position detection program for the electronic timepiece, and a recording medium on which the hand position detection program is recorded. .

Conventionally, for detecting the position of a pointer of an electronic timepiece, for example, a photoelectric sensor is attached to a window formed on a dial, and light emitted by the photoelectric sensor is reflected on the back surface of the pointer and received by the photoelectric sensor. A method of detecting the position of the pointer is known (for example, see Patent Document 1).
As another method for detecting the position of the pointer, for example, the tip side of the pointer is folded and formed into a hook shape, and the light from the light emitting port is reflected by the tip surface and received from the light receiving port. There has been proposed a method of detecting the position of (see, for example, Patent Document 2).
In these electronic timepieces such as Patent Document 1 and Patent Document 2, the position of the pointer is directly detected, unlike the case where the position of the pointer is recognized by detecting the rotation angle of the conventional gear, and the like. Can be detected.

Japanese Utility Model Publication No. 6-56787 (Fig. 2) Japanese Utility Model Publication No. 6-30795 (FIG. 6)

  However, in the electronic timepiece of Patent Document 1, it is necessary to form a window on the dial in order to attach the photoelectric sensor, and there is a problem that the appearance of the electronic timepiece is impaired. In the electronic timepiece of Patent Document 2, it is necessary to bend the hands in a hook shape, which also deteriorates the appearance of the timepiece. Further, in the timepiece of Patent Document 2, since it is necessary to form the hands in a hook shape, the design of the hands is restricted and the diversification of the design cannot be promoted.

  In order to detect the position of the pointer with the photoelectric sensor, it is necessary to emit light from the photoelectric sensor toward the pointer. For example, when the electronic watch is a wristwatch, strong light such as sunlight is used when used outdoors. May be irradiated on the dial. In such a case, the light from the photoelectric sensor becomes relatively weak so that the reflected light cannot be received well and the pointer cannot be detected, or the photoelectric sensor is erroneously detected by receiving sunlight. Therefore, it is difficult to ensure the detection performance of the pointer.

The first object of the present invention is an electronic timepiece capable of reliably detecting the position of the hands without impairing the appearance, a control method for the electronic timepiece, a hand position detection program for the electronic timepiece, and a hand position detection program. It is to provide a recording medium.
The second object of the present invention is to provide an electronic timepiece capable of reliably detecting the position of the pointer without being affected by the external environment such as external light irradiation, a method for controlling the electronic timepiece, and a hand position of the electronic timepiece. The object is to provide a recording medium in which a detection program and a needle position detection program are recorded.

  An electronic timepiece according to the present invention includes a dial having translucency, a pointer disposed on the front side of the dial, and a photovoltaic device that generates light by converting light energy into electrical energy disposed on the back side of the dial. An electronic timepiece that is disposed on the back side of the dial and emits light toward the pointer, and is reflected from the pointer out of the light that is disposed on the back side of the dial and is emitted from the light emitting device. A needle position detecting device having a light receiving device that receives reflected light and a needle position detecting unit that recognizes the position of the pointer by receiving reflected light from the light receiving device is provided.

According to the present invention, the light from the light emitting device passes through the translucent dial, reaches the pointer, is reflected by the pointer, and is received by the light receiving device. The needle position detector recognizes the position of the pointer by receiving light from the light receiving device. Since the dial has translucency and the light emitting device and the light receiving device are arranged on the back side of the dial, the light emitting device and the light receiving device are not exposed from the dial, and the appearance of the electronic timepiece is improved. There is no loss. In addition, since the dial has translucency, even if the light emitting device and the light receiving device are arranged on the back side of the dial, the emitted light and the reflected light from the pointer pass through the dial well. Therefore, the position of the hands can be reliably detected while ensuring a good appearance of the electronic timepiece. Thereby, the first object of the present invention is achieved.
Here, the surface side of the dial plate refers to the surface side of the dial plate that is visible from the outside, and the back surface side of the dial plate refers to the surface side opposite to the front surface side.

In the present invention, the pointer includes at least an hour hand and a minute hand, and the hand position detection device includes an hour hand position detection device that detects the position of the hour hand, and a minute hand position detection device that detects the position of the minute hand. It is desirable that the light emitting device and the light receiving device of the position detecting device are arranged closer to the center of rotation of the pointer than the light emitting device and the light receiving device of the minute hand position detecting device.
According to the present invention, since the light emitting device and the light receiving device of the hour hand position detecting device are disposed closer to the center of rotation of the pointer than the light emitting device and the light receiving device of the minute hand position detecting device, both are arranged in the radial direction. It is arranged at a shifted position. Therefore, malfunctions such as detection of the minute hand by the hour hand position detection device and detection of the hour hand by the minute hand position detection device are prevented, and the position detection of the pointer is more reliable. In particular, when the hour hand is formed shorter than the minute hand and is arranged on the dial side of the minute hand, if the light emitting device and the light receiving device of the minute hand position detecting device are arranged radially outward from the tip of the hour hand, the minute hand The position detection device does not detect the hour hand, and erroneous detection is prevented more reliably.

In the present invention, the pointer includes a second hand and at least one of an hour hand and a minute hand, and the hand position detection device includes a second hand position detection device that detects the position of the second hand, and an hour hand position detection device that detects the position of the hour hand. And a minute hand position detecting device for detecting the position of the minute hand, and a light emitting device and a light receiving device for the second hand position detecting device are a light emitting device and a light receiving device for the hour hand position detecting device, and a minute hand position detecting device. It is desirable that at least one of the light-emitting device and the light-receiving device is disposed on the opposite side across the center of rotation of the pointer.
According to the present invention, since the second hand position detecting device is disposed on the opposite side of the hour hand position detecting device and the minute hand position detecting device with the center of rotation of the pointer interposed therebetween, Even at a position where at least one of the second hand and the second hand overlap, the second hand is detected without being disturbed by the minute hand or the hour hand, so that the position detection of the second hand is ensured.

In the present invention, the photovoltaic power generation device includes a substrate and a photoelectric conversion unit that is disposed on the substrate and generates power by photoelectric conversion. The photoelectric conversion unit is divided into a plurality of portions on the substrate, and the light emitting device and At least one of the light receiving devices is desirably arranged in a gap formed between a plurality of photoelectric conversion units.
According to the present invention, since at least one of the light emitting device and the light receiving device is disposed in the gap portion, the reduction of the area of the photoelectric conversion portion is prevented. Accordingly, a decrease in power generation efficiency is prevented, and good power generation efficiency of the photovoltaic power generation apparatus is ensured.

  An electronic timepiece according to the present invention is an electronic timepiece including a dial, a pointer disposed on the surface side of the dial, and a photovoltaic power generation device that converts light energy into electric energy to generate electric power. A light emitting device that emits light, a light receiving device that receives reflected light reflected from the pointer out of light emitted from the light emitting device, and a needle position detector that recognizes the position of the pointer by receiving the reflected light from the light receiving device; A needle position detection device having an illuminance, an illuminance detection unit for detecting the illuminance of light irradiated on the dial, and a needle position detection control unit for controlling the operation of the needle position detection device in accordance with the illuminance detected by the illuminance detection unit It is characterized by comprising.

  According to the present invention, the light from the light emitting device is reflected by the pointer and received by the light receiving device. The needle position detector recognizes the position of the pointer by receiving light from the light receiving device. Since the hand position detection control unit controls the operation of the hand position detection device according to the illuminance detected by the illuminance detection unit, for example, when sunlight is strongly incident from the outside of the electronic timepiece at noon or at night By controlling the operation of the needle position detection device according to the external situation, such as when almost no light is incident on the lens, flexible operation according to the situation becomes possible, the position detection of the pointer becomes more accurate, and the position detection performance Will improve. This achieves the second object of the present invention.

In the present invention, the needle position detection control unit desirably stops the needle position detection operation of the pointer when the illuminance detected by the illuminance detection unit is larger than a preset illuminance.
For example, when sunlight is strongly incident from the outside of the electronic watch outdoors at daytime, the illuminance detected by the illuminance detection unit increases. In this case, the light emitted from the light emitting device becomes relatively weak, or the light receiving device receives sunlight from the outside and erroneously detects it, or the light receiving operation at the light receiving device is unstable. It may become. According to this invention, when the illuminance detected by the illuminance detection unit is larger than the set illuminance, the hand position detection control unit does not perform the pointer position detection operation, and thus erroneous detection is prevented. In addition, when it is determined that the position of the hands cannot be properly detected, a wasteful position detection operation is not performed, and thus labor saving of the electronic timepiece is promoted.

In the present invention, the needle position detection control unit desirably adjusts the light emission output of the light emitting device or the detection capability of the needle position detection unit according to the illuminance detected by the illuminance detection unit.
According to this invention, the light amount of the reflected light received by the light receiving device is also adjusted by adjusting the light emission output of the light emitting device according to the illuminance detected by the illuminance detecting unit. Therefore, for example, if the light output of the light emitting device is increased when the incident light is strong and the illuminance is large, the amount of light received by the light receiving device also increases, and the needle position detection of the pointer is good regardless of the external environment. Done.
Further, the needle position detection control unit adjusts the detection capability of the needle position detection unit according to the illuminance, for example, when the incident light from the outside is strong and the illuminance is high, the detection capability of the needle position detection unit is increased. Thus, the reflected light from the pointer is detected well, and the position of the pointer is detected well. Therefore, the position of the pointer is detected well regardless of the external environment.

  An electronic timepiece hand position detection control method according to the present invention includes a dial, a pointer disposed on the surface side of the dial, a photovoltaic device that generates light by converting light energy into electrical energy, a light emitting device, and a light receiving device. A hand position detection control method for an electronic timepiece that includes a hand position detection device that detects the position of a pointer, and emits light from the light emitting device toward the pointer and is emitted from the light emitting device by the light receiving device A needle position detecting step of receiving reflected light reflected from the pointer and recognizing the position of the pointer by receiving reflected light from the light receiving device; and an illuminance detecting step of detecting the illuminance of the light irradiated on the dial And a needle position detection control step for controlling a needle position detection operation in the needle position detection step according to the illuminance detected in the illuminance detection step.

  According to the present invention, in the hand position detecting step, light from the light emitting device passes through the transparent dial, reaches the pointer, is reflected by the pointer, and is received by the light receiving device. The needle position detector recognizes the position of the pointer by receiving light from the light receiving device. Since the illuminance detection step and the needle position detection control step control the needle position detection operation in accordance with the illuminance of the light irradiated on the dial, an appropriate needle position detection operation according to the external environment is possible. Accordingly, it is possible to accurately detect the position of the pointer without being affected by the external environment. Thereby, the second object of the present invention is achieved.

  An electronic timepiece hand position detection program according to the present invention includes a dial, a pointer disposed on the surface side of the dial, a photovoltaic device that generates light by converting light energy into electrical energy, a light emitting device, and a light receiving device. A hand position detection program for an electronic timepiece equipped with a hand position detection device for detecting the position of the pointer having a light emitted from the light emitting device toward the pointer to a computer incorporated in the electronic timepiece, The needle position detecting step of receiving the reflected light reflected from the pointer out of the light emitted from the light emitting device and recognizing the position of the pointer by receiving the reflected light from the optical device, and the illuminance of the light irradiated to the dial And an illuminance detection step for detecting the needle position and a needle position detection control step for controlling the needle position detection operation in the needle position detection step according to the illuminance detected in the illuminance detection step.

  The recording medium of the present invention is a computer-readable recording medium on which the needle position detection program is recorded.

  Also in these inventions, in the hand position detection control process, since the operation of the hand position detection process is controlled according to the illuminance detected in the illuminance detection process, for example, when sunlight is strongly incident from the outside of the electronic timepiece at noon Controlling the movement of the hand position detection process according to the external situation, such as when almost no light is incident on the electronic watch at night, enables flexible movement according to the situation, and the position of the pointer can be detected. It becomes more accurate and the position detection performance is improved. Thereby, the second object of the present invention is achieved.

  An electronic timepiece according to the present invention is an electronic timepiece including a dial, a pointer disposed on the surface side of the dial, and a photovoltaic power generation device that converts light energy into electric energy to generate electric power. A light emitting device that emits light, a light receiving device that receives reflected light reflected from the pointer out of light emitted from the light emitting device, and a needle position detector that recognizes the position of the pointer by receiving the reflected light from the light receiving device; Stylus position detection device, an illuminance detection unit that detects the illuminance of light irradiated on the dial, a shutter device that is disposed on the surface side of the dial and can shield light irradiation on the dial, and illuminance detection And a shutter operation control unit that controls the operation of the shutter device in accordance with the illuminance detected by the unit.

According to the present invention, the light from the light emitting device is reflected by the pointer and received by the light receiving device. The needle position detector recognizes the position of the pointer by receiving light from the light receiving device. Since the electronic timepiece is provided with a shutter device, it is possible to shield light irradiation on the dial. Therefore, for example, when sunlight from the outside is strong in the daytime, if the shutter device is controlled by the shutter operation control unit to block light irradiation on the dial, the light emitting device and the light receiving device of the hand position detecting device The operation of the apparatus is performed stably. Therefore, the position of the pointer is accurately and stably detected regardless of the external environment. Thereby, the second object of the present invention is achieved.
The light emitted from the light-emitting device is preferably light that can be distinguished from external light such as natural light and fluorescent light, and can be distinguished from external light by appropriately setting the frequency, wavelength, and the like. It is preferable.

In the present invention, the shutter device is preferably an electro-optical device.
According to the present invention, since the shutter device is an electro-optical device, the shutter operation is quickly performed by an electrical signal, and the light irradiation can be cut off, so that the responsiveness of the shutter device is improved. Further, since the shutter device is an electro-optical device, the shutter device can be reduced in size and thickness. Therefore, downsizing and thinning of the electronic timepiece are promoted, and the appearance of the electronic timepiece is not impaired. Examples of the electro-optical device include a liquid crystal device.

  An electronic timepiece hand position detection control method according to the present invention includes a dial, a pointer disposed on the surface side of the dial, a photovoltaic device that generates light by converting light energy into electrical energy, a light emitting device, and a light receiving device. And a hand position detection device that detects the position of the pointer, and emits light toward the pointer from the light emitting device, and the pointer out of the light emitted from the light emitting device by the light receiving device A needle position detecting step of receiving reflected light reflected from the light source and recognizing the position of the pointer by receiving the reflected light at the light receiving device; an illuminance detecting step of detecting the illuminance of light irradiated on the dial; And a shutter operation control step for controlling the operation of a shutter device that is arranged on the surface side of the dial plate and can block light irradiation on the dial plate according to the illuminance detected in the detection step. .

According to the present invention, in the needle position detecting step, light from the light emitting device is reflected by the pointer and received by the light receiving device. The needle position detector recognizes the position of the pointer by receiving light from the light receiving device. By the shutter operation control process, it is possible to shield light irradiation on the dial according to the illuminance detected in the illuminance detection process. Therefore, for example, when sunlight from outside is strong in the daytime, if the shutter device is controlled in the shutter operation control process to block the light from being emitted to the dial, the light emitting device and the light reception are detected in the hand position detection process. The operation of the apparatus is performed stably. Therefore, the position of the pointer is accurately and stably detected regardless of the external environment. Thereby, the second object of the present invention is achieved.
In the shutter operation control process, it is desirable that the shutter device shields light from being emitted onto the dial plate until the light emitting operation from the light emitting device and the light receiving operation by the light receiving device are completed. According to such a method, more stable and stable needle position detection is performed.

  An electronic timepiece hand position detection program according to the present invention includes a dial, a pointer disposed on the surface side of the dial, a photovoltaic device that generates light by converting light energy into electrical energy, a light emitting device, and a light receiving device. A hand position detection program for an electronic timepiece equipped with a hand position detection device for detecting the position of the pointer having a light emitted from the light emitting device toward the pointer to a computer incorporated in the electronic timepiece, The needle position detection process that receives the reflected light reflected from the pointer out of the light emitted from the light emitting device and recognizes the position of the pointer by receiving the reflected light from the light receiving device, and the illuminance of the light irradiated to the dial Illuminance detection process for detecting the illuminance and shutter operation control for controlling the operation of a shutter device arranged on the surface side of the dial plate and capable of blocking light irradiation on the dial plate according to the illuminance detected in the illuminance detection process Characterized in that to execute a degree.

  The recording medium of the present invention is a computer-readable recording medium on which the needle position detection program is recorded.

  Also in each of these inventions, since the electronic timepiece is provided with the shutter device, it is possible to shield light irradiation on the dial. Therefore, for example, when sunlight from the outside is strong in the daytime, if the shutter device is controlled by the shutter operation control process to cut off the light irradiation to the dial, the light emitting device in the hand position detection process and The operation of the light receiving device is performed stably. Therefore, the position of the pointer is accurately and stably detected regardless of the external environment. Thereby, the second object of the present invention is achieved.

  According to the electronic timepiece, the electronic timepiece control method, the electronic timepiece hand position detection control method, the electronic timepiece hand position detection program, and the recording medium of the present invention, the position of the pointer can be reliably set without impairing the appearance of the electronic timepiece. It can be detected. According to the present invention, the position of the pointer can be detected accurately and stably regardless of the external environment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the second and subsequent embodiments described later, the same components and components having the same functions as those in the first embodiment described below are denoted by the same reference numerals, and description thereof will be simplified or omitted.

[First embodiment]
FIG. 1 shows a plan view of a radio-controlled timepiece 1 as an electronic timepiece according to the first embodiment of the present invention. 2 shows a side sectional view of the radio-controlled timepiece 1. The radio-controlled timepiece 1 of this embodiment is a wristwatch-type electronic timepiece that receives a long-wave standard radio wave on which time information is superimposed and corrects the display time.

The radio-controlled timepiece 1 is attached to the outer case (body) 2 formed in an approximately cylindrical shape, the cover glass (windshield) 3 attached to the front surface side of the outer case 2, and the rear surface side of the outer case 2 detachably. The back cover 4 is provided.
The outer case 2 is made of a metal material such as stainless steel, brass, or titanium. The cover glass 3 is made of a non-conductive and non-magnetic light-transmitting material, and is made of, for example, inorganic glass or organic glass. The back cover 4 is made of a material that can pass wireless information such as standard radio waves such as non-metallic and non-magnetic materials such as inorganic glass and ceramics, and electromagnetic waves for charging.

  In the exterior case 2, a dial 5, a pointer 6 that is arranged on the cover glass 3 side (front side) of the dial 5 and displays the time in an analog manner, and light that generates light by converting light energy into electrical energy A power generation device 7 and a needle position detection device 8 for detecting the position of the pointer 6 are provided. Further, on the back cover 4 side of the dial plate 5, an analog movement 9 for driving the pointer 6, an antenna 12 (see FIG. 6), a circuit board 91, and the like are arranged.

  The dial plate 5 is made of a material having non-conductivity, non-magnetism, and translucency. For example, inorganic glass, plastic, ceramics, papers, and other arbitrary materials can be adopted. A surface (front surface) that can be visually recognized from the outside of the dial plate 5 is a time display surface 51, and a decorative sheet 52 having translucency is provided on the time display surface 51. Near the outer edge of the decorative sheet 52, decorations 53 such as numerals and letters representing time are printed in an annular shape.

As the pointer 6, an hour hand 61, a minute hand 62, and a second hand 63 are provided. The hour hand 61 is disposed closer to the dial plate 5 side than the minute hand 62 and the second hand 63, and the minute hand 62 is disposed closer to the dial plate 5 side than the second hand 63. The length dimension from the rotation center to the tip of the hour hand 61 is set shorter than the length dimension from the rotation center to the tip of the minute hand 62 and the second hand 63, and the length dimension from the rotation center to the tip of the minute hand 62 is The second hand 63 is set slightly shorter than the length dimension from the center of rotation to the tip. The second hand 63 is formed with an extending portion 632 that extends to the opposite side of the rotation point from the side indicating the time.
FIG. 3 shows the back side of the pointer 6. As shown in FIG. 3, on the back side of the hour hand 61, the minute hand 62, and the second hand 63, mirror surface portions 611, 621, and 631 that reflect light emitted from the hand position detecting device 8 are formed. . The other portions of these mirror surface portions 611, 621, 631 are pear surfaces on which fine irregularities are formed. The mirror surface portion 611 of the hour hand 61 and the mirror surface portion 621 of the minute hand 62 are formed on the distal ends of the hour hand 61 and the minute hand 62, respectively. Since the hour hand 61 has a shorter length than the minute hand 62, the mirror surface portion 611 is disposed closer to the center of rotation of the hour hand 61 and the minute hand 62 than the mirror surface portion 621. The mirror surface portion 631 of the second hand 63 is disposed on the distal end side of the extending portion 632.

FIG. 4 shows a plan view of the photovoltaic device 7. As shown in FIG. 4, the photovoltaic device 7 includes a photoelectric conversion element 71 as a photoelectric conversion unit that generates power by photoelectric conversion, and a support substrate 72 as a substrate that supports the photoelectric conversion element 71. It is configured.
The photoelectric conversion elements 71 are formed in a substantially fan-shaped panel shape with a central angle of about 90 degrees, and four photoelectric conversion elements 71 having the same shape are arranged on a support substrate 72, and these photoelectric conversion elements 71 are connected in series. It is connected. The photoelectric conversion element 71 is configured by laminating a transparent electrode layer (TOC), a semiconductor layer, and a transparent electrode layer in this order from the dial 5 side (not shown). The transparent electrode layer has a transparent conductive film, and examples of the transparent conductive film include SnO2, ZnO, ITO (Indium Tin Oxide), and the like. The semiconductor layer is a PIN photodiode having a pn junction structure made of microcrystalline or amorphous silicon. A reflective metal film may be deposited on the transparent electrode layer on the side separated from the dial 5. Between the adjacent photoelectric conversion elements 71, a gap 73 in which the support substrate 72 is exposed is formed.
The support substrate 72 is made of a non-magnetic and non-conductive material such as polyimide resin, glass-filled epoxy resin, or ceramics. The support substrate 72 is a substantially circular plate having substantially the same area as the dial plate 5, and is bonded to the photoelectric conversion element 71 on the opposite side to the dial plate 5.
Such a photovoltaic device 7 is fixed by joining the photoelectric conversion element 71 to the dial plate 5.

  The hand position detecting device 8 includes an hour hand position detecting device 8A for detecting the hour hand 61, a minute hand position detecting device 8B for detecting the minute hand 62, and a second hand position detecting device 8C for detecting the second hand 63. These needle position detection devices 8 (8A, 8B, 8C) emit light emitted from the light emitting devices 81 (81A, 81B, 81C) (see FIG. 6) that emit light toward the hands 6 (61, 62, 63), respectively. A light receiving device 82 (82A, 82B, 82C) (see FIG. 6) that receives reflected light reflected from the pointer 6 (61, 62, 63) out of the light emitted from the device 81 (81A, 81B, 81C); A needle position detector 83 (83A, 83B, 83C) (see FIG. 6) that recognizes the position of the pointer 6 (61, 62, 63) by receiving reflected light from the light receiving device 82 (82A, 82B, 82C). It has.

FIG. 5 shows an hour hand position detection device 8 </ b> A of the hand position detection device 8.
The light emitting device 81A and the light receiving device 82A of the hour hand position detecting device 8A are arranged at positions corresponding to the mirror surface portion 611 at the position where the hour hand 61 points to 12:00. The light emitting device 81 </ b> A and the light receiving device 82 </ b> A are arranged in the gap 73 between the photoelectric conversion elements 71 of the photovoltaic power generation device 7, inserted into the holes 721 formed in the support substrate 72, and mounted on the circuit board 91 to be fixed. Has been. Therefore, the light emitting device 81A and the light receiving device 82A of the hour hand position detecting device 8A are arranged in close contact with the back surface of the dial plate 5. As shown in FIG. 5, each of the light emitting device 81A and the light receiving device 82A is configured so that the light emitted from the light emitting device 81A is reflected by the mirror surface portion 611 of the hour hand 61 and enters the light receiving device 82A. The arrangement angle has been adjusted.

  The light emitting device 81B and the light receiving device 82B of the minute hand position detecting device 8B are arranged at positions corresponding to the mirror surface portion 621 at the position where the minute hand 62 points to 0 minute. The light emitting device 81B and the light receiving device 82B have the same configuration as the light emitting device 81A and the light receiving device 82A of the hour hand position detecting device 8A, are disposed in the gap 73 of the photovoltaic power generator 7, and are mounted on the circuit board 91. The dial 5 is disposed in close contact with the back surface. With such an arrangement, the light emitting device 81B and the light receiving device 82B of the minute hand position detecting device 8B have the center of rotation of the pointer 6 (the hour hand 61 and the minute hand 62) more than the light emitting device 81A and the light receiving device 82A of the hour hand position detecting device 8A. It is arranged on the outer peripheral side.

The light emitting device 81C and the light receiving device 82C of the second hand position detecting device 8C are disposed at a position corresponding to the mirror surface portion 631 at a position where the second hand 63 indicates 0 second. Here, since the mirror surface portion 631 is formed in the extending portion 632 of the second hand 63, the light emitting device 81C and the light receiving device 82C of the second hand position detecting device 8C are the light emitting device 81A and the light receiving device of the hour hand position detecting device 8A. Arranged on the opposite side with respect to the device 82A and the light emitting device 81B and the light receiving device 82B of the minute hand position detecting device 8B with the rotation center of the hands 6 (the hour hand 61, the minute hand 62, and the second hand 63) interposed therebetween, the radio wave correction The timepiece 1 is arranged in the 6 o'clock direction.
The light emitting device 81C and the light receiving device 82C of the second hand position detecting device 8C have the same configuration as the light emitting device 81A and the light receiving device 82A of the hour hand position detecting device 8A, and are arranged in the gap 73 of the photovoltaic power generation device 7 and circuit. It is mounted on the substrate 91 and arranged in close contact with the back surface of the dial 5. The light emitting device 81C and the light receiving device 82C of the second hand position detecting device 8C are arranged closer to the rotation center of the pointer 6 (the hour hand 61 and the second hand 63) than the light emitting device 81A and the light receiving device 82A of the hour hand position detecting device 8A. ing.

  The antenna 12 is configured to be able to receive a long-wave standard radio wave (for example, 40 to 77.5 kHz) such as a ferrite rod wound with a coil. Moreover, the shape may be a rod-like (straight) shape like a general bar antenna, or an antenna curved in a planar arc shape.

Next, the circuit configuration of the radio-controlled timepiece 1 will be described with reference to FIG.
The radio-controlled timepiece 1 includes a radio wave receiving unit 10 that receives a long wave standard radio wave (wireless information) on which time information is superimposed, and a hand movement control unit 30, and is driven by power from a power source 25.

  The radio wave receiving means 10 includes a reception unit 11, an antenna 12, a reception control unit 13, a storage unit 14 that can store time information output from the reception unit 11, and a reception schedule unit 15 that sets a reception schedule. Prepare.

The receiving unit 11 includes an amplifying circuit, a bandpass filter, a demodulating circuit, a decoding circuit, and the like (not shown), processes long-wave standard radio waves received by the antenna 12 to extract time information (time code), and the time information is accurate. It is configured so that it can be determined and stored in the storage unit 14.
As a method for determining whether or not the received time information is accurate, various methods used in conventional radio-controlled timepieces can be employed. For example, if there is a non-existing time or day, such as 68 minutes, and each time data represents an expected time, that is, if it is time data received continuously, Therefore, a method for confirming whether the time data is accurate from the point of whether each data is such time can be adopted.

  As will be described later, the reception control unit 13 controls the operation of the reception unit 11 in accordance with the reception timing (schedule) content instructed from the reception schedule unit 15.

  The reception schedule unit 15 includes a reception schedule storage unit 21, an external operation unit 22, and a forced reception instruction unit 23.

  The reception schedule storage unit 21 stores a reception time (periodic reception time) set in advance by a watch manufacturer as a reception processing time by the radio wave receiving means 10. As the basic reception time, for example, 2:00 am every day is set as the basic reception time, and as a re-reception time when reception is not possible at the basic reception time, the time is lowered every hour (3 am, 4 am, 5 am Hour ...) is set.

The external operation unit 22 includes a crown 54 (see FIG. 1) and first and second buttons 55 (see FIG. 1) provided in the radio-controlled timepiece 1. In the present embodiment, the forced reception instructing unit 23 is configured to be operated by the operation of the external operation unit 22.
The forced reception instructing unit 23 is configured to instruct the reception control unit 13 to receive the standard radio wave regardless of the reception time of the reception schedule storage unit 21 when the external operation unit 22 is operated.

The hand movement control unit 30 includes an oscillation unit 31, a frequency division unit 32, an internal counter 33, a comparison unit 34, a correction control unit 35, a drive unit 36, a needle position detection device 8, a needle position counter 84, and a needle position comparison unit 85. The driving of the pointer 6 is controlled.
In the present embodiment, the driving means 36 includes an hour / minute hand driving means 36A for driving the hour hand 61 and the minute hand 62, and a second hand driving means 36B for driving the second hand 63. The hour / minute hand driving means 36A includes an hour / minute motor, an hour / minute wheel train, and an hour / minute control section (not shown). The second hand driving means 36B includes a second motor, a second wheel train, and a second control unit (not shown).

  An oscillation unit (oscillation circuit) 31 oscillates a reference oscillation source such as a crystal resonator at high frequency, and a frequency division unit (frequency division circuit) 32 divides the oscillation signal to obtain a predetermined reference signal (for example, a signal of 1 Hz). Output as. The internal counter 33 counts this reference signal and measures the current time. Therefore, each of the oscillation unit 31, the frequency dividing unit 32, and the internal counter 33 constitutes an internal time measuring unit that measures the internal time.

  The drive control unit of the drive unit 36 outputs drive pulses for driving the motors of the drive units 36A and 36B according to the counter value of the internal counter 33. For example, a second counter and an hour / minute counter are provided in the internal counter 33, and when each counter value is counted up, the drive control unit of the drive means 36 outputs a drive pulse to the corresponding hour / minute motor or second motor. It is configured.

  The comparison unit 34 compares the time information of the standard radio wave stored in the storage unit 14 with the time information based on the counter value of the internal counter 33 when the standard radio wave is received by the reception unit 11, and the internal counter 33 When the time information based on is different from the time information of the standard radio wave, the time difference information is output to the correction control unit 35.

  The correction control unit 35 updates the internal counter 33 to the current time based on the time difference information. Along with the update of the internal counter 33, each motor is driven via the drive control unit of each drive means 36, and the pointer 6 is corrected to the current time.

The needle position counter 84 is reset when a needle position detection signal is received from the needle position detection device 8 and counts a drive signal from the drive control unit of the drive means 36. Thereby, the count value of the needle position detecting device 8 corresponds to the position of the pointer 6.
The hand position comparison unit 85 compares the internal time data counted by the internal counter 33 with the hand position data counted by the hand position counter 84, and corrects the internal counter 33 or the pointer 6 if they do not match. Then, the needle position counter 84 is corrected.

The power source 25 includes the photovoltaic device 7, a storage battery 26 that stores electric power generated by the photovoltaic device, and an overcharge prevention unit 27 provided between the photovoltaic device 7 and the storage battery 26.
The overcharge prevention unit 27 includes a voltage detection circuit that detects the voltage of the storage battery 26 and an overcharge prevention control circuit that controls a built-in charge control switch in accordance with the detection voltage. That is, the overcharge prevention unit 27 detects the state of charge (charge voltage) of the storage battery 26 using the voltage detection circuit, and when the battery reaches a predetermined charge level, the overcharge prevention control circuit disconnects the charge control switch and turns off the storage battery 26. To prevent overcharging.

[Needle position detection operation]
An operation for detecting the position of the pointer 6 in the radio-controlled timepiece 1 having such a configuration will be described.
FIG. 7 is a flowchart showing the hand position detection process of the radio-controlled timepiece 1. As shown in FIG. 7, when it is detected that the radio-controlled timepiece 1 is at start-up or system reset (step S1), a hand position detection process at start-up / system reset is executed (step S10).
The radio-controlled timepiece 1 also determines whether the internal time (current time) counted by the internal counter 33 is 0: 0: 0 or 12:00:00 (step S2). If there is, the hand position detection process at 0 o'clock or 12 o'clock is executed (step S30).
Further, the radio-controlled timepiece 1 determines whether the internal time (current time) counted by the internal counter 33 is every minute, that is, 0 seconds (step S3). A position detection process is executed (step S60).

That is, when the radio-controlled timepiece 1 is started or when the system is reset, it is necessary to detect the hand position because the hand position counter 84 has no hand position information. For this reason, when the radio-controlled timepiece 1 is activated or the system is reset, the radio-controlled timepiece 1 executes a hand position detection process S10.
The radio-controlled timepiece 1 detects the position of the hour hand 61 and the minute hand 62 every 12 hours during normal hand movement, and detects the position of the second hand 63 every minute.

[Needle position detection process at startup / system reset]
Next, the needle position detection process (step S10) at the time of activation and system reset will be described based on FIG.
First, the radio-controlled timepiece 1 operates the hand position detection device 8 to execute a hand position detection process. In the present embodiment, first, the second hand position detection device 8C is operated, and the position detection process of the second hand 63 is performed (step S11). Specifically, the light emitting device 81C of the second hand position detecting device 8C is operated to emit light. The light emitted from the light emitting device 81C passes through the translucent dial plate 5. At this time, only when the second hand 63 is positioned at the 0 second position, the light is reflected by the mirror surface portion 631 of the second hand 63. The reflected light is received by the light receiving device 82C. With this light reception, the hand position detection unit 83C detects the second hand 63 and outputs a second hand position detection signal (hand position detection step).

In step S12, it is determined whether or not it has been detected in the second hand position detection detection process (step S11) that the second hand 63 is in the 0 second position based on whether or not the second hand position detection signal has been output. Here, when the second hand position detection signal is not output (N in step S12), one drive signal is output (one pulse) via the drive control unit of the second hand driving means 36B, and the second motor is moved one step. The minute drive is performed (step S13). When the second hand 63 moves, the radio-controlled timepiece 1 performs the second hand 63 position detection process again (step S11), and determines whether the second hand 63 has been detected (step S12).
When the processes in steps S11 to S13 are repeated, the second hand 63 is detected in step S12 while the second hand 63 moves one round (60 seconds).

  When the second hand 63 is detected in step S12 (Y in step S12), the radio-controlled timepiece 1 operates the hour hand position detection device 8A and the minute hand position detection device 8B to perform the position detection processing of the hour hand 61 and the minute hand 62. Perform (step S14). Specifically, the light emitting device 81A of the hour hand position detecting device 8A and the light emitting device 81B of the minute hand position detecting device 8B are operated to emit light. The light emitted from the light emitting devices 81A and 81B is transmitted through the dial plate 5, and only when the hour hand 61 and the minute hand 62 are located at the 0 o'clock (12 o'clock) and 0 minute positions, the light is reflected on the mirror surface portion 611. Reflected by 621, the reflected light is received by the light receiving devices 82A and 82B. With this light reception, the hand position detection units 83A and 83B detect the hour hand 61 and the minute hand 62, respectively, and output an hour hand position detection signal and a minute hand position detection signal, respectively (needle position detection step).

In step S15, it is determined whether or not it is detected in the hour / minute hand position detection process (step S14) that the minute hand 62 is in the 0 minute position, based on whether or not the minute hand position detection signal is output. If the minute hand position detection signal is not output (N in step S15), one drive signal is output (one pulse) via the drive control unit of the hour / minute hand driving means 36A, and the hour / minute motor is turned on. Drive for one step (step S16). When the hour hand 61 and the minute hand 62 are moved, the radio-controlled timepiece 1 performs the hour / minute hand position detection process again (step S15).
When the processes in steps S14 to S16 are repeated, the minute hand 62 is detected in step S15 while the minute hand 62 moves one round (60 minutes).

When the minute hand 62 is detected in step S15 (Y in step S15), the hour hand position detection signal indicates whether or not the hour hand has detected that the 61 is in the 0 o'clock (12 o'clock) position in step S17. Judgment is made based on whether or not is output. If the hour hand position detection signal is not output (N in step S17), the process proceeds to step S16 and the same processing as described above is performed.
When the hour hand 61 is detected in step S17 (Y in step S17), the minute hand 62 is in the 0 minute position and the hour hand 61 is in the 0 hour (12 o'clock) position. (Step S18).

When a second hand position detection signal is output from the second hand position detection device 8C in step S12, the second hand 63 is stopped at the 0 second position. For this reason, the hand position counter 84 that has received the second hand position detection signal resets the second hand position counter provided therein and returns it to 0 so that the counter value of the second hand position counter and the position of the second hand 63 are synchronized. ing.
Similarly, when the minute hand position detection signal is output in step S15 and the hour hand position detection signal is output in step S17, the hour hand 61 and the minute hand 62 are stopped at the 0: 0 position. The hand position counter 84 resets the hour hand position counter and the minute hand position counter provided therein, and the counter values of the hour hand position counter and the minute hand position counter are synchronized with the positions of the hour hand 61 and the minute hand 62, respectively. Yes.

  When returning to the normal hand movement in step S18, the radio-controlled timepiece 1 drives the driving means 36 until the counter value of the hand position counter 84 matches the counter value of the internal counter 33 in the hand position comparison unit 85. To fast-forward the pointer 6 and move to the current time. After that, the normal hand movement according to the reference signal from the frequency divider 32 is performed.

[Pointer position detection processing at 0 o'clock or 12 o'clock]
Next, the needle position detection process (step S30) at 0:00 or 12:00 will be described with reference to FIG.
First, the radio-controlled timepiece 1 operates the hour hand position detection device 8A and the minute hand position detection device 8B to execute the position detection process of the hour hand 61 and the minute hand 62 (step S31). In step S32, it is determined whether or not it has been detected in the hour / minute hand position detection process (step S31) that the minute hand 62 is at the 0 minute position, based on whether or not the minute hand position detection signal has been output. If the minute hand position detection signal has been output (Y in step S32), the process proceeds to step S35, where the hour hand position detection signal is output indicating whether or not the hour hand 61 has been detected at the 0 or 12 o'clock position. Judgment is made based on whether or not If the hour hand position detection signal is output (Y in step S35), it can be detected that the hour hand 61 and the minute hand 62 are in the correct positions, so the hand position detection process is terminated and the display returns to the current time display. Returning to normal hand movement (step S38), the needle position detection process S30 at 0 o'clock or 12 o'clock is terminated.
Here, since the hour / minute hand position detection process (step S30) is executed when the internal counter 33 is 0: 0 or 12:00:00, the hour hand 61 and the minute hand 62 are normally detected (Y in step S32). In step S35, the needle position detection process S30 at 0 o'clock or 12 o'clock is immediately terminated.

On the other hand, if the minute hand 62 cannot be detected in step S32 (N in step S32), the hour hand 61 and the minute hand 62 are moved step by step because the minute hand 62 is deviated from the time information of the internal counter 33. The position is detected each time.
Specifically, first, it is determined whether or not the detection of the minute hand 62 has failed for 60 minutes at the time indicated by the minute hand 62 (step S33). Here, if 60 minutes have failed, that is, if the minute hand 62 has not been detected even after being moved by one revolution (Y in step S33), the hand position detection process is terminated (step S38). This is because, for example, when the light intensity of the light emitting device 81B of the minute hand position detection device 8B is reduced and erroneous detection occurs, it is highly possible that the minute hand 62 cannot be detected even if the hand position detection process is continued. is there.

If the detection of the minute hand 62 has not yet failed for 60 minutes in step S33 (N in step S33), the hour / minute motor is driven by one step, and the hour hand 61 and the minute hand 62 are moved by one step (step S33). S34). In the present embodiment, the minute hand 62 is set to move for one minute in one step. That is, the minute hand 62 is set to rotate once (moves 360 degrees) in 60 steps, and rotates in an angle of 6 degrees in one step. At this time, the hour hand 61 is rotated in conjunction with the minute hand 62 by the hour / minute wheel train.
When the hour hand 61 and the minute hand 62 move in step S34, the hour / minute hand position detection process S31 in step S31 is executed again.

  If the hour hand 61 cannot be detected in step S35 (N in step S35), it is determined whether or not it has failed for 12 hours at the time indicated by the hour hand 61 (step S36). Here, when the failure has occurred for 12 hours, that is, when the hour hand 61 has not been detected even after being moved by one revolution (Y in step S36), the hand position detection process is terminated (step S38). This is because, for example, when the light intensity of the light emitting device 81A of the hour hand position detection device 8A is reduced and erroneous detection occurs, it is highly possible that the hour hand 61 cannot be detected even if the hand position detection process is continued. is there.

If the detection of the hour hand 61 has not yet failed for 12 hours in step S36 (N in step S36), the hour / minute motor is driven by one step and the hour hand 61 and the minute hand 62 are moved by one step (step S36). S37).
When the hour hand 61 and the minute hand 62 move in step S37, the process returns to step S31 to execute the hour / minute hand position detection process again.

[Every minute hand position detection process]
Next, the minute hand position detection processing S60 will be described with reference to FIG.
When the hand position detection process S60 is executed, the second hand position detection device 8C is operated, and the second hand position detection process is performed (step S61). The second hand position detection process (step S61) is the same process as the second hand position detection process (step S11) in FIG.
The radio-controlled timepiece 1 determines whether or not the second hand 63 has been detected (step S62). If the second hand 63 has not been detected, the second hand by driving the second motor until the detection failure reaches 60 seconds (step S63). The movement 63 (step S64) and the second hand position detection process (step S61) are repeated.

  On the other hand, if the second hand 63 is detected in step S62 or if the detection failure is 60 seconds in step S63, the hand position detection process is terminated and normal hand movement is resumed (step S65). The resumption of the normal hand movement is performed by first returning the pointer 6 to the current time based on the hand position information counted by the hand position counter 84 and the current time information counted by the internal counter 33, and thereafter performing normal hand movement processing. I do.

  In this embodiment, every time one drive signal is output from the second hand drive means 36B to the second motor, the second hand 63 moves one second, and at that time, the second hand position detection process S61 is executed, and step S63 is executed. If the detection failure is 60 seconds, it means that the second hand 63 could not be detected even if the second hand 63 was rotated one revolution. This is because there is a high possibility that the second hand 63 cannot be detected when, for example, the light quantity of the light emitting device 81C is reduced and erroneous detection occurs.

[Time correction processing]
Next, time correction processing for correcting the time by receiving a standard radio wave will be described with reference to FIG.
When the forced reception instructing unit 23 notifies the reception control unit 13 that the standard radio wave is received by the operation of the external operation unit 22 (Y in step S21), the reception control unit 13 activates the reception unit 11. The reception process is executed (step S23).
Even when there is no operation of the external operation unit 22 (N in step S21), the reception control unit 13 refers to the reception time data set in the reception schedule storage unit 21 to determine whether or not the reception time has come. Confirm (step S22). When the reception time comes, the reception schedule unit 15 notifies the reception control unit 13 that the reception time has come (Y in step S22), and the reception control unit 13 operates the reception unit 11 to execute reception processing. (Step S23). If the reception time has not been reached in step S22 (N in step S22), the reception control process is terminated without adjusting the time.

In the reception process (step S <b> 23), the receiving unit 11 receives a standard radio wave via the antenna 12.
Next, the receiving unit 11 determines whether or not the reception is successful (step S24). If the reception is successful (Y in step S24), the received time information is stored in the storage unit 14. The comparison unit 34 compares the time information stored in the storage unit 14 with the counter value of the internal counter 33 and outputs time difference information corresponding to the error between the two to the correction control unit 35. The correction control unit 35 corrects the internal counter 33 based on the time difference information, and the driving means 36 drives the pointer 6 according to the correction of the internal counter 33, corrects the display time, and displays an accurate time. (Step S25), the time correction process is terminated.
If reception fails in step S24 (N in step S24), the time adjustment process is terminated without performing time adjustment.

According to such a first embodiment, the following effects can be obtained.
(1) Since the light emitting devices 81A, 81B, 81C and the light receiving devices 82A, 82B, 82C of the hand position detecting device 8 (8A, 8B, 8C) are arranged on the back side of the dial plate 5, the radio wave correction timepiece 1 It is possible to ensure a good appearance without impairing the appearance.
In addition, since the dial 5 has translucency, the light emitted from the light emitting devices 81A, 81B, 81C satisfactorily reaches the pointer 6 even in such an arrangement, and the reflected light from the pointer 6 is not reflected. Since it reaches the light receiving devices 82A, 82B, and 82C satisfactorily, the position of the pointer 6 can be reliably detected.
Further, since the position of the pointer 6 is detected by receiving the reflected light from the mirror surface portions 611, 621, 631 of the pointer 6, the position of the pointer 6 can be directly detected unlike the case of detecting the rotational position of the conventional gear. Therefore, the position of the pointer 6 can be detected more reliably.

(2) The mirror surface portion 611 of the hour hand 61 is disposed closer to the rotation center side of the pointer 6 than the mirror surface portion 621 of the minute hand 62. Accordingly, the light emitting device 81A and the light receiving device 82A of the hour hand position detecting device 8A are Since the minute hand position detecting device 8B is disposed closer to the center of rotation of the pointer 6 than the light emitting device 81B and the light receiving device 82B, the hour hand position detecting device 8A detects the minute hand 62, or the minute hand position detecting device. It is possible to reliably prevent erroneous detection such as detecting the hour hand 61 at 8B.
Further, since the mirror surface portions 611, 621, 631 are formed on the pointer 6 and other portions are formed in a satin shape, for example, even if light from the light emitting device 81A of the hour hand position detecting device 8A hits the minute hand 62, the satin surface Therefore, the reflected light is not received by the light receiving device 82A. For this reason, the minute hand 62 is not detected by the hour hand position detecting device 8A, and the hour hand 61 is not detected by the minute hand position detecting device 8B.
Further, the hour hand 61 is disposed on the dial plate 5 side with respect to the minute hand 62, the hour hand 61 is shorter than the minute hand 62, and the minute hand position detecting device 8B is disposed outside the tip of the hour hand 61. Thus, even when the hour hand 61 and the minute hand 62 overlap, both the hour hand 61 and the minute hand 62 can be detected.

 (3) Since the second hand 63 has the extending portion 632 and the mirror surface portion 631 is formed on the extending portion 632, the second hand 63 can be detected even at the position where the hour hand 61, the minute hand 62, and the second hand 63 overlap. . Further, since the mirror surface portion 631 is disposed closer to the rotation center side of the pointer 6 than the mirror surface portion 611 of the hour hand 61 and the mirror surface portion 621 of the minute hand 62, the second hand 63 is moved by the hour hand position detecting device 8A or the minute hand position detecting device 8B. There is no detection and erroneous detection can be reliably prevented.

 (4) Since each of the light emitting devices 81A, 81B, 81C and the light receiving devices 82A, 82B, 82C is disposed in the gap 73 between the photoelectric conversion element 71 and the photoelectric conversion element 71 of the photovoltaic power generation device 7, Good power generation efficiency can be ensured without reducing the area of the conversion element 71.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. The second embodiment is different from the first embodiment except that the operation of the hand position detection device is controlled in accordance with the illuminance of light irradiated near the dial plate 5 in the radio-controlled timepiece 1 except for the first embodiment. It is the same.
FIG. 12 shows a configuration block diagram of the radio-controlled timepiece 1 according to the second embodiment. As shown in FIG. 12, the radio-controlled timepiece 1 includes a power generation voltage detection unit 74 as an illuminance detection unit that detects a power generation voltage generated by the photovoltaic power generation device 7, and an illuminance detected by the power generation voltage detection unit 74. And a needle position detection control unit 75 for controlling the operation of the needle position detection device 8 according to the above. As the illuminance detection unit, any illuminance detection method such as detecting the value of a current flowing through a predetermined resistor can be adopted in addition to detecting the generated voltage.

The generated voltage detection unit 74 detects the generated voltage generated by the photoelectric conversion element 71 of the photovoltaic power generation device 7 as a detection value corresponding to the illuminance of the light irradiated on the dial plate 5, and detects this generated voltage in the hand position detection. Output to the control unit 75.
The hand position detection control unit 75 includes a light emission output storage unit (not shown) in which the relationship between the light emission outputs of the light emitting devices 81A, 81B, and 81C with respect to the generated voltage is preset and stored. The hand position detection control unit 75 refers to the light emission output information in the light emission output storage unit and determines an appropriate light emission output according to the power generation voltage detected by the power generation voltage detection unit 74.

The light emission output adjustment processing in the second embodiment will be described with reference to FIG.
FIG. 13 shows a flowchart of the light emission output adjustment processing according to the second embodiment. In the second embodiment, before the needle position detection processing of the first embodiment (needle position detection processing at start-up / system reset, needle position detection processing at 0 o'clock or 12 o'clock, and needle position detection processing at every minute) The light emission output adjustment process is performed.
In the light emission output adjustment process, first, the power generation voltage detection unit 74 detects the power generation voltage of the photoelectric conversion element 71 and outputs it to the needle position detection control unit 75 (step S41, illuminance detection step). The hand position detection control unit 75 refers to the light emission output storage unit to determine the light emission output of the light emitting devices 81A, 81B, 81C corresponding to the detected power generation voltage (step S42). Then, the needle position detection control unit 75 adjusts the light emission outputs of the light emitting devices 81A, 81B, 81C of the needle position detection devices 8A, 8B, 8C according to the determined light emission output (step S43, needle position detection control). Process).
Here, when the detected power generation voltage is large, for example, when the dial 5 is irradiated with sunlight, since the illuminance of light irradiated on the dial 5 is large, the light emitting devices 81A, 81B, 81C May not be received correctly by the light receiving devices 82A, 82B, and 82C. Therefore, the needle position detection control unit 75 adjusts the light emission outputs of the light emitting devices 81A, 81B, and 81C of the needle position detection devices 8A, 8B, and 8C in the increasing direction.

According to such a second embodiment, in addition to the same effects as the effects (1) to (4) of the first embodiment, the following effects can be obtained.
(5) Since the power generation voltage detection unit 74 and the needle position detection control unit 75 are provided, the needle position detection control unit 75 determines whether the light emitting devices 81A, 81B, and 81C are in accordance with the illuminance of light applied to the dial plate 5. The light emission output can be increased. Therefore, for example, even when the dial 5 is exposed to strong direct sunlight, an appropriate amount of light is emitted from the light emitting devices 81A, 81B, and 81C, and is reliably reflected by the light receiving devices 82A, 82B, and 82C. Can be received. Therefore, the position of the pointer 6 can be detected reliably and stably without being affected by the external environment.

[Third embodiment]
Next, a third embodiment of the present invention will be described. In the third embodiment, the radio wave correction timepiece 1 in the first embodiment is provided with a shutter device.
FIG. 14 is a block diagram showing the configuration of the radio-controlled timepiece 1 according to the third embodiment of the present invention. The radio-controlled timepiece 1 includes a power generation voltage detection unit 74 having the same configuration as that of the second embodiment, a shutter device 76 that can shield light irradiation on the dial plate 5, and a shutter operation that controls the operation of the shutter device 76. And a control unit 77. The means for detecting the illuminance of the light applied to the dial plate 5 may be the other illuminance detection section described in the second embodiment in addition to the generated voltage detection section 74.

FIG. 15 is a side sectional view of the shutter device 76. The shutter device 76 is an electro-optical device having a configuration in which a liquid crystal material (not shown) is sealed between two substrates 761 and 762 provided in contact with the back side of the cover glass 3. Transparent electrodes are formed on the entire inner surfaces of the substrates 761 and 762, respectively. In such a shutter device 76, when a voltage is applied to the transparent electrode, the refractive index of the liquid crystal molecules between the substrates 761 and 762 changes, and external light is diffusely reflected, thereby obtaining a cloudy display. Thereby, the light from the outside is shielded by the shutter device 76, and the irradiation of the light to the dial 5 from the outside is suppressed.
Note that the shutter device 76 may be configured to perform electro-optical display by forming electrodes in multiple layers. In this case, the analog time display by the hands 6 and the electro-optical display such as letters, numbers, and patterns by the shutter device 76 can be displayed in an overlapping manner.
If the generated voltage detected by the generated voltage detection unit 74 is equal to or higher than a predetermined value, the shutter operation control unit 77 operates the shutter device 76 to block light from the outside.

Such processing in the third embodiment will be described with reference to FIG.
FIG. 16 shows a flowchart of the light shielding determination process according to the third embodiment. In the third embodiment, before the needle position detection processing of the first embodiment (needle position detection processing at start-up / system reset, needle position detection processing at 0 o'clock or 12 o'clock, and needle position detection processing at every minute) The light blocking judgment process is performed.

In the light blocking determination process, first, the power generation voltage detection unit 74 detects the power generation voltage of the photoelectric conversion element 71 and outputs it to the shutter operation control unit 77 (step S51, illuminance detection step). The shutter operation control unit 77 determines whether or not the detected power generation voltage is greater than or equal to a predetermined value (step S52). When the generated voltage is equal to or higher than the predetermined value (Y in step S52), the light emitted from the outside is strong, and the reflected light by the light emitted from the light emitting devices 81A, 81B, 81C is received by the light receiving devices 82A, 82B, 82C. May not be able to receive light well. Therefore, the shutter operation control unit 77 operates the shutter device 76 to apply a voltage between the electrodes of the substrates 761 and 762 to make the shutter device 76 cloudy and shield light from the outside (step S53, needle position detection). Control process). In this state, the same needle position detection processing as described in the first embodiment (needle position detection processing at start-up / system reset, needle position detection processing at 0 o'clock or 12 o'clock, and needle position detection processing at every minute) I do. Here, the time during which the shutter device 76 shields the light is the light emitting operation of the light emitting devices 81A, 81B, 81C, the light receiving operation of the light receiving devices 82A, 82B, 82C, and the detection operation of the needle position detectors 83A, 83B, 83C. It is desirable to set it longer than the required time.
In step S52, when the generated voltage is less than the predetermined value (N in step S52), the shutter operation control unit 77 determines that it is not necessary to block light from the outside, and the shutter device 76 operates. The light blocking judgment process is terminated without performing the above.

According to such a third embodiment, in addition to the same effects as the effects (1) to (4) of the first embodiment, the following effects can be obtained.
(6) Since the radio-controlled timepiece 1 includes the shutter device 76, when the light radiated from the outside to the dial plate 5 is strong, the shutter device 76 can be operated to shield the light from the outside. Therefore, even when the radio wave correction watch 1 is irradiated with strong light such as direct sunlight and it is difficult to detect the position of the pointer 6 by the hand position detecting device 8, the hand position is detected after the light from the outside is blocked by the shutter device 76. By performing the detection process, the position detection process of the pointer 6 can be performed reliably and stably without being affected by the external environment.
(7) Since the shutter device 76 is composed of an electro-optical device in which a liquid crystal material is sealed, light from the outside can be quickly shielded by applying a voltage to the transparent substrate. Therefore, the responsiveness of the shutter device 76 can be improved.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
The arrangement of the hand position detection device in the plan view of the light emitting device and the light receiving device is not limited to that of the above-described embodiment, and any arrangement can be adopted according to the specifications and performance of the electronic timepiece. That is, for example, as shown in FIG. 17, the light emitting device and the light receiving device of the hour hand position detecting device 8A are placed in the 2 o'clock direction of the electronic timepiece, and the light emitting device and the light receiving device of the minute hand position detecting device 8B are connected to the electronic timepiece. In the 12 o'clock direction, the light emitting device and the light receiving device of the second hand position detecting device 8C may be arranged in the 6 o'clock direction of the electronic timepiece. In this case, it is possible to detect the hour hand 61 at the 2 o'clock position, the minute hand 62 at the 0 minute position, and the second hand at the 0 second position. As described above, the arrangement of the light emitting device and the light receiving device of the needle position detecting device in plan view can be arbitrarily set. When the light emitting device and the light receiving device of the hand position detecting device are arranged as shown in FIG. 17, for example, when the standard radio wave reception schedule of the radio wave correction watch 1 is set around 2 o'clock, the hand position is detected. Since the time correction process can be performed immediately after that, more accurate time correction can be performed.

The arrangement of the light emitting device and the light receiving device of the needle position detecting device in a plan view is not limited to the one arranged in the gap formed between the adjacent photoelectric conversion units, as shown in FIG. The position where the photoelectric conversion element 71 is disposed may be used. In this case, the light emitting devices and the light receiving devices of all the needle position detecting devices do not have to be at the positions where the photoelectric conversion elements 71 are disposed. For example, at least one of the plurality of light emitting devices and light receiving devices is disposed in the gap 73. May be.
In addition, the photovoltaic device is not limited to the one in which the photoelectric conversion unit is divided into four parts, and the photoelectric conversion element 71 is divided into two parts and arranged on the support substrate 72 as shown in FIG. The shape and arrangement thereof are arbitrary. Further, the photoelectric conversion unit may not be divided into a plurality of parts.

The arrangement of the light emitting device and the light receiving device of the hand position detecting device in a side view is not limited to that arranged in contact with the back side of the dial as shown in FIG. 5, but for example as shown in FIG. Alternatively, the decorative sheet 52 may be disposed in contact with the back surface side. In FIG. 18, the light emitting device and the light receiving device of the hand position detecting device 8 are mounted on a circuit board 91 and inserted through a mounting hole 56 formed in the dial plate 5. The light emitting device and the light receiving device of the hand position detecting device 8 are arranged in contact with the back side of the decorative sheet 52 of the dial plate 5. Even with such an arrangement, it can be said that the arrangement is on the back side of the dial plate 5 and the effect that the appearance of the radio-controlled timepiece 1 is not impaired is obtained as in the above-described embodiment.
Further, as shown in FIG. 19, when the dial 5 is not provided with the decorative sheet 52, the needle position detection device in the side view of the light-emitting device and the light-receiving device is recessed on the back side of the dial 5. 57 may be formed, and the light emitting device and the light receiving device of the needle position detecting device 8 may be disposed in the concave portion 57. Even in this case, it can be said that the light emitting device and the light receiving device of the hand position detecting device 8 are arranged on the back surface side of the dial plate 5, and the effect that the appearance of the radio-controlled timepiece 1 is not impaired is the same as in the above-described embodiment. can get.

The hands may not be the second hand 63, the minute hand 62, and the hour hand 61. For example, only the minute hand and the hour hand may be used, or only the hour hand may be used, and the combination thereof is arbitrary.
In the pointer, the mirror surface portions 611, 621, and 631 are formed on the back surface side in each of the above embodiments, but the shape of these mirror surface portions 611, 621, and 631 is arbitrary. That is, for example, as shown in FIG. 20, the shape of the mirror surface portion may be formed so that the width dimension is smaller than the mirror surface portions 611, 621, 631 of the above-described embodiments. In particular, since the minute hand 62 and the hour hand 61 have a small rotation angle per unit time, light from the light emitting device may be continuously reflected by the mirror surface portions 611 and 621 in a plurality of unit times. Then, since the width of the mirror surface portions 611 and 621 is small, the light of the light emitting device can be reflected only at the predetermined positions of the minute hand 62 and the hour hand 61, so that the detection accuracy of the pointer 6 can be increased. The width dimensions of the mirror surface portions 631, 621, and 611 of the second hand 63, the minute hand 62, and the hour hand 61 are preferably made smaller in the order of the pointer with the smaller rotation amount (movement amount) per unit time. The width dimension of 611 is preferably smaller than the width dimension of the mirror surface portion 621 of the minute hand 62, and the width dimension of the mirror surface portion 621 of the minute hand 62 is preferably set smaller than the mirror surface portion 631 of the second hand 63.

  The illuminance detection unit is not limited to detecting the illuminance of light to the dial plate by detecting the power generation voltage of the photovoltaic device, for example, by detecting the current value flowing through a predetermined resistance of the photovoltaic device, It may be one that detects the illuminance of light. In addition, the illuminance detection unit may directly detect the illuminance of light by providing an illuminance meter on the back side of the cover glass (windshield) or the dial, for example.

The needle position detection control unit is not limited to adjusting the light emission output of the light emitting devices 81A, 81B, and 81C as in the second embodiment. For example, the needle position detection control unit is in accordance with the illuminance of light detected by the illuminance detection unit. You may be comprised so that control which does not perform a detection process may be performed. In this case, for example, when the power generation voltage output from the illuminance detection unit is equal to or higher than a predetermined value, the needle position detection control unit can detect the needle position satisfactorily because the light irradiated from the outside is strong. It is determined that there is no needle position, the needle position detection operation is stopped (stopped), and the needle position detection process is terminated. According to such a configuration, the hand position detecting operation in a situation where the hand position cannot be detected accurately can be omitted, and labor saving of the electronic timepiece can be promoted.
The needle position detection control unit is not limited to adjusting the light emission output of the light emitting device, and is configured to adjust the detection capability of the needle position detection unit according to the illuminance of light detected by the illuminance detection unit, for example. It may be. In this case, the hand position detection control unit determines whether or not the illuminance detected by the illuminance detection unit is greater than or equal to a predetermined value set in advance. What is necessary is just to increase the detection capability (detection sensitivity) of a needle position detection part, judging that light is strong and needle position detection cannot be performed favorably. According to such a configuration, since the detection capability of the needle position detection unit can be adjusted according to the illuminance of light from the outside, the needle position can always be detected satisfactorily without being greatly affected by the external environment.

  The shutter device is not limited to the liquid crystal device as in the third embodiment, and for example, an organic EL or any other electro-optical device can be applied. The shutter device is not limited to an electro-optical device, and may be a mechanical shutter device that can mechanically shield light. Further, the shutter device is not limited to a device that blocks light over all wavelengths, but may be a device that blocks or transmits only light having a predetermined wavelength (frequency), or a predetermined filter using a polarizing filter or the like. Only light having a polarization plane may be blocked or transmitted. In such cases, the light from the light-emitting device can be distinguished from the light from the light-emitting device and external light if the wavelength and polarization plane of the transmitted light are different from each other. The position can be detected reliably.

When the electronic timepiece has an illuminance detection unit and is equipped with a hand position detection control unit that controls the operation of the hand position detection device according to the illuminance detected by the illuminance detection unit, or detected by the illuminance detection unit In the case of an electronic timepiece having a shutter operation control unit that controls the operation of the shutter device according to the illuminance, the light emitting device and the light receiving device of the hand position detecting device are not necessarily arranged on the back side of the dial May be. In other words, the light emitting device and the light receiving device of the hand position detecting device are arranged so as to be exposed on the surface side of the dial, for example, or arranged on the outer peripheral side of the dial so that the light emitting device can be rotated from the outer edge to the center of the dial It may be configured to emit light toward the center. In this case, the dial can be made of a non-transparent member such as metal, so that the decorativeness of the dial can be improved. Furthermore, even in the above case, the pointer can be reliably detected regardless of the external environment by controlling the needle position detection operation according to the illuminance of the illuminance detection unit or controlling the shutter device. Two goals can be achieved.
In the case of the second embodiment and the third embodiment, as the needle position detection device, a light emitting device that is directed toward the pointer, and reflected light that is reflected by the light emitted from the light emitting device are received. However, the present invention is not limited to this. In other words, the needle position detection device, for example, forms an opening such as a small hole in each gear of the train wheel that drives the pointer, and receives light received from the light receiving device when the openings of the plurality of gears coincide. May be configured to indirectly confirm the pointer position by receiving light. In this case, an illuminance detector is provided in accordance with the gist of the second embodiment or the third embodiment, and the capabilities of the light emitting device and the light receiving device are made variable according to the detected illuminance, or a shutter device is provided to Position detection may be performed easily and reliably.

Further, when the electronic timepiece is an electronic timepiece having the hand position detection control unit of the second embodiment and the shutter operation control unit of the third embodiment, the dial is not necessarily made of a material having translucency. For example, it may be made of a non-translucent material. Even in this case, the needle position detection control unit or the shutter operation control unit controls the operation of the needle position detection device or the operation of the shutter device according to the illuminance of the light radiated to the dial. Can be reliably detected, and the second object of the present invention can be achieved.
Furthermore, in the above case, the photovoltaic device is not always necessary, and even an electronic timepiece having no photovoltaic device can produce an effect that the pointer can be reliably detected regardless of the external environment. The second objective of can be achieved. When the electronic timepiece does not have a photovoltaic power generation device, the illuminance detection unit does not detect the power generation voltage or power generation current of the photovoltaic power generation device, for example, an illuminance meter that directly detects the illuminance of light. Etc. may be used.

The radio wave correction clock is a watch type, but the radio wave correction clock may be a table clock or a pocket watch. In particular, the present invention can be widely applied to various radio wave correction watches that are carried and used, such as watches and pocket watches whose reception environment (living environment) changes because they are carried and used.
The electronic timepiece can be applied to various electronic timepieces such as a multi-function timepiece in addition to the radio timepiece.
The hand position detection device and the hand position detection control method of the present invention may be any type of electronic timepiece hand as long as it detects the position of the hand of the electronic timepiece. A time difference setting pointer, a 24-hour display hand, or the like may be used. Further, a CG hour hand, a CG minute hand, a CG second hand, a CG 1/5 second hand, a CG 1/10 second hand, a CG 1/100 second hand, and a CG 24 hour hand for chronograph (CG) may be used. Further, it may be used for each pointer for alarm or an alarm setting needle. The detection of the position of each pointer is used to check whether the pointer position matches the electronic circuit of the internal counter, or to check whether the internal counter matches the set pointer position. It is done.

Furthermore, in the present invention, each means such as the needle position detection unit in the radio wave reception unit and the hand movement control unit, the needle position detection control unit, and the shutter operation control unit is configured by hardware such as various logic elements. In addition, a computer having a CPU (Central Processing Unit), a memory (storage device), etc. is provided in a watch or a portable device, and a predetermined program or data (data stored in each storage unit) is incorporated in the computer. It may be configured to realize the means.
Here, the program and data may be stored in advance in a memory such as a RAM or a ROM incorporated in an electronic device such as a clock. Further, for example, a predetermined control program and data may be installed in a memory in an electronic device such as an electronic timepiece via a communication means such as the Internet or a recording medium such as a CD-ROM or a memory card. Then, each means may be realized by operating a CPU or the like with a program stored in the memory. In order to install a predetermined program or the like on an electronic timepiece or the like, a memory card or a CD-ROM or the like may be directly inserted into the electronic timepiece or the like. It may be connected to a watch or the like. Furthermore, a program or the like may be supplied and installed by communication by connecting a LAN cable, a telephone line, or the like to an electronic watch, or may be supplied and installed by wireless.

  If a control program or the like provided by such a recording medium or communication means such as the Internet is incorporated in an electronic device such as a watch, the functions of the inventions can be realized only by changing the program. A desired control program can be selected and incorporated. In this case, since various electronic devices having different control formats can be manufactured only by changing the program, the parts can be shared, and the manufacturing cost when developing variations can be greatly reduced.

Although the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.
Therefore, the description limited to the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

The top view which shows the electronic timepiece concerning 1st embodiment of this invention. 1 is a side sectional view of an electronic timepiece according to a first embodiment. The figure which shows the back surface side of a pointer | guide. The figure which shows a photovoltaic device. The sectional side view which shows a needle position detection apparatus. 1 is a configuration block diagram of an electronic timepiece according to a first embodiment. The flowchart which shows a hand position detection process. The flowchart which shows the needle | hook position detection process at the time of starting and system reset. The flowchart which shows the hand position detection process at 0:00 or 12:00. The flowchart which shows the needle position detection process for every minute. The flowchart which shows a time correction process. The block diagram of the configuration of the electronic timepiece according to the second embodiment of the present invention. The flowchart which shows the needle position detection process of 2nd embodiment. The block diagram of the configuration of the electronic timepiece according to the third embodiment of the present invention. The sectional side view which shows a shutter apparatus. The flowchart which shows the light interruption | blocking judgment process of 3rd embodiment. The figure which shows the modification of this invention. The figure which shows another modification of this invention. The figure which shows another modification of this invention. The figure which shows the modification of the pointer | guide of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Radio wave correction clock (electronic timepiece), 6 ... Hand, 8 ... Hand position detection device, 8A ... Hour hand position detection device, 8B ... Minute hand position detection device, 7 ... Photoelectric generator, 8C ... Second hand position detection device , 61 ... hour hand, 62 ... minute hand, 63 ... second hand, 71 ... photoelectric conversion element (photoelectric conversion part), 72 ... support substrate (substrate), 73 ... gap part, 74 ... illuminance detection part, 75 ... needle position detection control part , 76 ... Shutter device, 77 ... Shutter operation control unit, 81 (81A, 81B, 81C) ... Light emitting device, 82 (82A, 82B, 82C) ... Light receiving device, 83 (83A, 83B, 83C) ... Needle position detection unit .

Claims (15)

An electron comprising a dial having translucency, a pointer arranged on the front side of the dial, and a photovoltaic device arranged on the back side of the dial and converting light energy into electric energy to generate electricity A watch,
A light emitting device arranged on the back side of the dial and emitting light toward the pointer, and a reflected light reflected from the pointer out of light emitted from the light emitting device arranged on the back side of the dial is received. An electronic timepiece comprising: a light receiving device; and a hand position detecting device having a hand position detecting unit that recognizes the position of the pointer by receiving the reflected light by the light receiving device. The electronic timepiece according to claim 1,
The pointer includes at least an hour hand and a minute hand,
The hand position detecting device includes an hour hand position detecting device for detecting the position of the hour hand, and a minute hand position detecting device for detecting the position of the minute hand,
The electronic timepiece characterized in that the light emitting device and the light receiving device of the hour hand position detecting device are arranged closer to the center of rotation of the pointer than the light emitting device and the light receiving device of the minute hand position detecting device. The electronic timepiece according to claim 1 or 2,
The pointer includes a second hand and at least one of an hour hand and a minute hand,
The hand position detecting device includes at least one of a second hand position detecting device for detecting the position of the second hand, an hour hand position detecting device for detecting the position of the hour hand, and a minute hand position detecting device for detecting the position of the minute hand. With
The light emitting device and the light receiving device of the second hand position detecting device are arranged such that the pointer is at least one of the light emitting device and the light receiving device of the hour hand position detecting device and the light emitting device and the light receiving device of the minute hand position detecting device. An electronic timepiece characterized by being arranged on the opposite side across the center of rotation. The electronic timepiece according to any one of claims 1 to 3,
The photovoltaic device includes a substrate and a photoelectric conversion unit that is disposed on the substrate and generates power by photoelectric conversion,
The photoelectric conversion unit is divided into a plurality of parts on the substrate,
At least one of the light emitting device and the light receiving device is disposed in a gap formed between a plurality of the photoelectric conversion units. An electronic timepiece comprising a dial, a pointer disposed on the surface side of the dial, and a photovoltaic device that generates light by converting light energy into electrical energy,
A light emitting device that emits light toward the pointer, a light receiving device that receives reflected light reflected from the pointer out of the light emitted from the light emitting device, and reception of the reflected light by the light receiving device. A needle position detection device having a needle position detection unit for recognizing the position;
An illuminance detector that detects the illuminance of the light applied to the dial;
An electronic timepiece comprising: a hand position detection control unit that controls the operation of the hand position detection device in accordance with the illuminance detected by the illuminance detection unit. The electronic timepiece according to claim 5,
The electronic timepiece, wherein the hand position detection control unit stops the hand position detection operation of the pointer when the illuminance detected by the illuminance detection unit is larger than a preset illuminance. The electronic timepiece according to claim 5 or 6,
The electronic timepiece wherein the hand position detection control unit adjusts the light emission output of the light emitting device or the detection capability of the hand position detection unit according to the illuminance detected by the illuminance detection unit. A dial, a pointer disposed on the surface side of the dial, a photovoltaic device that generates light by converting light energy into electrical energy, and a needle position that detects the position of the pointer having a light emitting device and a light receiving device An electronic timepiece position detection control method comprising a detection device,
The light emitted from the light emitting device toward the pointer, the light receiving device receives reflected light reflected from the pointer out of the light emitted from the light emitting device, and the light receiving device receives the reflected light. A needle position detection step for recognizing the position of the pointer;
An illuminance detection step of detecting the illuminance of light irradiated on the dial,
And a hand position detection control step of controlling a hand position detection operation in the hand position detection step according to the illuminance detected in the illuminance detection step. A dial, a pointer disposed on the surface side of the dial, a photovoltaic device that generates light by converting light energy into electrical energy, and a needle position that detects the position of the pointer having a light emitting device and a light receiving device An electronic timepiece hand position detection program comprising a detection device,
In the computer incorporated in the electronic watch,
The light emitted from the light emitting device toward the pointer, the light receiving device receives reflected light reflected from the pointer out of the light emitted from the light emitting device, and the light receiving device receives the reflected light. A needle position detection step for recognizing the position of the pointer;
An illuminance detection step of detecting the illuminance of light irradiated on the dial,
A hand position detection program for an electronic timepiece, which executes a hand position detection control step for controlling a hand position detection operation in the hand position detection step in accordance with the illuminance detected in the illuminance detection step.   A computer-readable recording medium on which the electronic watch hand position detection program according to claim 9 is recorded. An electronic timepiece comprising a dial, a pointer disposed on the surface side of the dial, and a photovoltaic device that generates light by converting light energy into electrical energy,
A light emitting device that emits light toward the pointer, a light receiving device that receives reflected light reflected from the pointer out of the light emitted from the light emitting device, and reception of the reflected light by the light receiving device. A needle position detection device having a needle position detection unit for recognizing the position;
An illuminance detector that detects the illuminance of the light applied to the dial;
A shutter device arranged on the surface side of the dial plate and capable of shielding light irradiation to the dial plate;
An electronic timepiece comprising: a shutter operation control unit that controls the operation of the shutter device according to the illuminance detected by the illuminance detection unit. The electronic timepiece according to claim 11,
The electronic timepiece, wherein the shutter device is an electro-optical device. A dial, a pointer disposed on the surface side of the dial, a photovoltaic device that generates light by converting light energy into electrical energy, and a needle position that detects the position of the pointer having a light emitting device and a light receiving device An electronic timepiece position detection control method comprising a detection device,
The light emitted from the light emitting device toward the pointer, the light receiving device receives reflected light reflected from the pointer out of the light emitted from the light emitting device, and the light receiving device receives the reflected light. A needle position detection step for recognizing the position of the pointer;
An illuminance detection step of detecting the illuminance of light irradiated on the dial,
A shutter operation control step for controlling the operation of a shutter device that is arranged on the surface side of the dial plate and can block light irradiation to the dial plate according to the illuminance detected in the illuminance detection step. An electronic timepiece position detection control method characterized by the above. A dial, a pointer arranged on the front side of the dial, a photovoltaic device arranged on the back side of the dial to generate light by converting light energy into electrical energy, a light emitting device and a light receiving device An electronic timepiece hand position detection program comprising a hand position detection device for detecting the position of the hands,
In the computer incorporated in the electronic watch,
The light emitted from the light emitting device toward the pointer, the light receiving device receives reflected light reflected from the pointer out of the light emitted from the light emitting device, and the light receiving device receives the reflected light. A needle position detection step for recognizing the position of the pointer;
An illuminance detection step of detecting the illuminance of light irradiated on the dial,
And a shutter operation control step for controlling an operation of a shutter device arranged on the surface side of the dial plate and capable of blocking light irradiation on the dial plate according to the illuminance detected in the illuminance detection step. A program for detecting the position of the hands of an electronic timepiece.   A computer-readable recording medium on which the electronic watch hand position detection program according to claim 14 is recorded.

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