JP2017138160A - Electronic device and control method of electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus and a control method of the electronic apparatus which can reduce the possibility of failure of reception until reception conditions are precisely set, and which can reduce time until the reception conditions are precisely set.SOLUTION: An electronic apparatus 1 includes: a reception part 45 for receiving a satellite signal from a positional information satellite; an illuminance detection part for detecting a value related to the illuminance of applied light; a threshold setting part 55 for setting a value of an illuminance threshold on the basis of positional information on a current place; and a reception control part 51 which determines whether or not the illuminance is the illuminance threshold or more on the basis of the value detected by the illuminance detection part, and which performs reception processing by operating the reception part 45 when the illuminance is the illuminance threshold or more.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electronic device that receives satellite signals and a method for controlling the electronic device.

2. Description of the Related Art Conventionally, in an electronic device that receives a satellite signal from a position information satellite such as a GPS satellite, an electronic device that performs a reception process for receiving a satellite signal when a preset reception condition is met is known. Among such electronic devices, there is one that optimizes reception conditions in accordance with the living environment of a person who uses the electronic device (see, for example, Patent Document 1).
When the electronic device of Patent Document 1 detects a high illuminance state in which the illuminance of light hitting the solar cell is equal to or greater than the illuminance threshold, the electronic device determines that the electronic device is exposed to sunlight outdoors and receives a satellite signal. Execute. And when the said electronic device fails in reception, it raises an illumination intensity threshold value 1 step | paragraph and makes reception conditions severe. In addition, when the reception process is not executed for a predetermined period (for example, 24 hours), the illuminance threshold is lowered by one step, and the reception condition is relaxed.
Moreover, the electronic device of other embodiment of patent document 1 performs a reception process, when the continuation time of a high illumination state is more than a time threshold value. And when the said electronic device fails in reception, a time threshold value is lengthened by one step, and reception conditions are made severe. When the reception process is not executed for a predetermined period, the time threshold is shortened by one step, and the reception condition is relaxed.

JP 2012-150047 A

Here, for example, when the electronic device of Patent Document 1 moves from a high-latitude region to a low-latitude region or the like and moves to a region where the energy of sunlight is greatly different, an appropriate illuminance threshold value or time threshold value is set. It may be significantly different from the illuminance threshold or the time threshold.
For example, when an appropriate illuminance threshold value or time threshold value is larger than the set illuminance threshold value or time threshold value, light emitted to the electronic device when a user carrying the electronic device passes through a window in a room. As a result, reception processing may be failed. However, since the illuminance threshold value or the time threshold value is changed to a value larger by one step only when reception fails in the electronic device of Patent Document 1, at least until the reception fails, the illuminance threshold value or time The threshold cannot be changed to an appropriate value. For this reason, failure to receive cannot be avoided and power consumption may increase.
In the electronic device disclosed in Patent Document 1, the illuminance threshold value or the time threshold value is changed to a smaller value by one step only when the reception process is not executed for a predetermined period. Therefore, contrary to the above case, if the appropriate illuminance threshold or time threshold is smaller than the set illuminance threshold or time threshold, it takes time until the illuminance threshold or time threshold reaches an appropriate value. As a result, the reception process may not be executed for a long time.

  An object of the present invention is to provide an electronic device and an electronic device that can reduce the possibility of reception failure before the reception condition is properly set and can shorten the time until the reception condition is properly set. It is to provide a control method.

  The electronic apparatus according to the present invention sets a value of an illuminance threshold value based on position information of a current position, a receiving unit that receives a satellite signal from a position information satellite, an illuminance detecting unit that detects a value related to the illuminance of irradiated light And determining whether or not the illuminance is equal to or greater than the illuminance threshold based on a value detected by the illuminance detection unit, and when the illuminance is equal to or greater than the illuminance threshold, A reception control unit that executes reception processing.

For example, the electronic device includes a solar cell as a power generation unit, and the illuminance detection unit includes the solar cell as a light receiving unit. And an illuminance detection part detects the value regarding the illuminance of the light irradiated to a solar cell. The value relating to the illuminance is a value having a correlation with the illuminance, for example, an open circuit voltage or a short circuit current of the solar cell.
According to the present invention, when the light is irradiated on the light receiving unit of the illuminance detection unit and the illuminance is equal to or greater than the illuminance threshold set by the threshold setting unit, the reception control unit operates the reception unit to execute reception processing.
Here, the threshold setting unit sets the value of the illuminance threshold based on the current location information. For example, the position information is latitude and altitude, and the threshold setting unit sets the illuminance value corresponding to the latitude and altitude of the current location as the illuminance threshold.
For example, a case where the position information is latitude will be described. The energy of sunlight changes according to the latitude. For example, the energy of sunlight in a low latitude region is larger than the energy of sunlight in a high latitude region. Since the appropriate illuminance threshold value is a lower limit value of the illuminance of light that can be determined to be outdoors, when the energy of sunlight changes, the appropriate illuminance threshold value also changes. For example, as the energy of sunlight increases, the energy of sunlight that enters from a window indoors also increases. Therefore, in order to avoid performing reception processing indoors, the illuminance threshold needs to be increased. For this reason, an appropriate illumination intensity threshold changes according to the latitude.
According to the present invention, when the electronic device moves to an area having a different latitude, a value corresponding to the latitude of the current location can be set as the illuminance threshold, and therefore the illuminance threshold can be set to an appropriate value.
Further, according to this, the illuminance threshold is changed only by increasing the illuminance threshold when reception fails and lowering the illuminance threshold when reception processing is not executed for a predetermined period (for example, 24 hours). Compared to the case, it is possible to reduce the possibility of reception failure before the illuminance threshold is set to an appropriate value, and to shorten the time until the illuminance threshold is set to an appropriate value.

  The electronic device according to the present invention includes a receiving unit that receives a satellite signal from a position information satellite, an illuminance detecting unit that detects a value related to the illuminance of the irradiated light, and an illuminance threshold value based on time information indicating the current time. Based on a threshold value setting unit for setting a value and a value detected by the illuminance detection unit, it is determined whether or not the illuminance is equal to or greater than the illuminance threshold value. A reception control unit that operates to execute reception processing.

According to the present invention, when light is emitted to the illuminance detection unit and the illuminance is equal to or greater than the illuminance threshold set by the threshold setting unit, the reception control unit operates the reception unit to execute reception processing.
Here, the threshold setting unit sets the value of the illuminance threshold based on the time information. For example, the time information is a morning / noon / evening time or a month / month / day month, and the threshold setting unit sets an illuminance value corresponding to the current morning / noon / evening time or month as an illuminance threshold.
For example, a case where the time information is a month will be described. The energy of sunlight changes according to the season. For example, the energy of sunlight in summer is greater than the energy of sunlight in winter. For this reason, an appropriate illumination intensity threshold changes according to a season.
According to the present invention, since the value corresponding to the current month can be set as the illuminance threshold, the illuminance threshold can be set to an appropriate value.
In addition, according to this, compared with the case where the illuminance threshold is changed only by increasing the illuminance threshold when reception fails and lowering the illuminance threshold when reception processing is not executed for a predetermined period of time, It is possible to reduce the possibility of reception failure before the illuminance threshold is set to an appropriate value, and to shorten the time until the illuminance threshold is set to an appropriate value.

  The electronic device of the present invention sets a time threshold value based on a receiving unit that receives a satellite signal from a position information satellite, an illuminance detecting unit that detects a value related to the illuminance of irradiated light, and position information of the current location And determining whether or not the duration of the high illuminance state in which the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold based on the value detected by the threshold setting unit and the illuminance detection unit. A reception control unit that operates the reception unit to execute a reception process when the duration of is equal to or greater than the time threshold.

According to the present invention, when light is emitted to the illuminance detection unit and the duration of the high illuminance state is equal to or greater than the time threshold set by the threshold setting unit, the reception control unit operates the reception unit to execute reception processing To do.
Here, the threshold value setting unit sets a time threshold value based on the current location information. For example, the position information is latitude and altitude, and the threshold setting unit sets a time value corresponding to the latitude and altitude of the current location as the time threshold.
For example, a case where the position information is latitude will be described. The energy of sunlight changes according to the latitude. The appropriate time threshold value is a lower limit value of the time that can be determined to be outdoors, so that the appropriate time threshold value changes when the energy of sunlight changes. For example, the greater the energy of sunlight, the wider the range of sunlight that illuminates at or above the illuminance threshold at indoor windows, so the illuminance applied to the electronic device when a user carrying the electronic device passes by the window. The time during which the light exceeding the threshold is irradiated becomes longer. For this reason, in order to avoid receiving processing being performed indoors, it is necessary to lengthen the time threshold. For this reason, an appropriate time threshold value changes according to the latitude.
According to the present invention, when the electronic device moves to an area having a different latitude, a value corresponding to the latitude of the current location can be set as the time threshold, so that the time threshold can be set to an appropriate value.
Also, according to this, as compared with the case where the time threshold is changed only by increasing the time threshold when reception fails and shortening the time threshold when reception processing is not executed for a predetermined period, The possibility that reception may fail before the time threshold is set to an appropriate value can be reduced, and the time until the time threshold is set to an appropriate value can be shortened.

  The electronic device according to the present invention includes a receiving unit that receives a satellite signal from a position information satellite, an illuminance detecting unit that detects a value related to the illuminance of the irradiated light, and a time threshold value based on time information indicating the current time. Based on a threshold setting unit for setting a value and a value detected by the illuminance detection unit, it is determined whether or not the duration of the high illuminance state in which the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold. And a reception control unit that operates the reception unit to execute reception processing when the duration of the high illuminance state is equal to or greater than the time threshold value.

According to the present invention, when light is emitted to the illuminance detection unit and the duration of the high illuminance state is equal to or greater than the time threshold set by the threshold setting unit, the reception control unit operates the reception unit to execute reception processing To do.
Here, the threshold value setting unit sets a time threshold value based on the time information. For example, the time information is morning / noon / night time or month / month / day month, and the threshold setting unit sets a time value corresponding to the current morning / noon / night time or month as the time threshold.
For example, the energy of sunlight changes according to the season. For this reason, a suitable time threshold value changes according to a season.
According to the present invention, since a value corresponding to the current month can be set as the time threshold, the time threshold can be set to an appropriate value.
Also, according to this, as compared with the case where the time threshold is changed only by increasing the time threshold when reception fails and shortening the time threshold when reception processing is not executed for a predetermined period, The possibility that reception may fail before the time threshold is set to an appropriate value can be reduced, and the time until the time threshold is set to an appropriate value can be shortened.

  The electronic device of the present invention is based on a receiving unit that receives a satellite signal from a position information satellite, an illuminance detecting unit that detects a value related to the illuminance of irradiated light, time information indicating the current time, and position information of the current location. Based on the value detected by the illuminance detection unit and the threshold value setting unit that sets the illuminance threshold value and the time threshold value, the duration of the high illuminance state in which the illuminance is equal to or greater than the illuminance threshold value is the time threshold value. It is determined whether or not it is above, and when the duration of the high illuminance state is equal to or greater than the time threshold, a reception control unit that operates the reception unit to execute reception processing is provided.

According to the present invention, when the illuminance detection unit is irradiated with light and the duration of the high illuminance state is equal to or greater than the time threshold, the reception control unit operates the reception unit to execute reception processing.
Here, the threshold value setting unit sets the illuminance threshold value and the time threshold value based on the time information and the current location information.
The energy of sunlight changes according to the latitude and season. For example, in the low-latitude area, the fluctuation of the solar energy according to the season is small, but in the high-latitude area, the fluctuation of the solar energy according to the season is large. For this reason, it is preferable that the illuminance threshold and the time threshold are set in consideration of not only the latitude but also the season. Thus, the appropriate illuminance threshold and time threshold vary according to latitude and season.
According to the present invention, the illuminance threshold and the time threshold can be set to appropriate values because the values corresponding to the latitude and the current month of the current location can be set as the illuminance threshold and the time threshold.
Further, according to this, the illuminance threshold value and the time threshold value are increased only when the illuminance threshold value and the time threshold value are increased when reception fails and the illuminance threshold value and the time threshold value are decreased when reception processing is not executed for a predetermined period. Compared to changing the threshold value, the possibility of reception failure before each threshold value is set to an appropriate value can be reduced, and the time until each threshold value is set to an appropriate value is shortened. it can.

  In the electronic device according to the aspect of the invention, the reception unit acquires and outputs the position information by executing a positioning calculation based on the satellite signal, and the threshold setting unit outputs the position output from the reception unit. It is preferable to set a threshold value based on the information.

  According to the present invention, the position information of the current location can be acquired by receiving the satellite signal and performing the positioning calculation. For example, the user sets the position information of the current location by operating the operation unit of the electronic device. There is no need to do this, and convenience can be improved.

  In the electronic device according to the aspect of the invention, the receiving unit acquires and outputs the position information by executing positioning calculation based on the satellite signal, and stores the position information output from the receiving unit. When the position information stored in the position information storage unit is updated, the threshold setting unit preferably sets a threshold value based on the updated position information.

According to the present invention, the position information of the current location can be acquired by receiving the satellite signal and performing the positioning calculation. For example, the user sets the position information of the current location by operating the operation unit of the electronic device. There is no need to do this, and convenience can be improved.
Also, when the position information output from the receiving unit is the same as the position information stored in the position information storage unit since the electronic device has not moved since the position information stored in the position information storage unit was updated In this case, since the threshold value can be prevented from being set, the processing load can be reduced as compared with the case where the setting is always performed every time position information is output from the receiving unit.

  In the electronic device of the present invention, an operation unit that performs a selection operation for selecting city information indicating a city, the city information is selected according to the selection operation of the operation unit, and the position based on the selected city information It is preferable to include a position information setting unit that sets information.

  According to the present invention, the user can set the location information of the current location by selecting the city information of the current location by operating the operation unit. For example, the user directly sets the location information such as latitude by operating the operation unit. Compared to the case, the position information can be set easily.

  The present invention is a method for controlling an electronic device, comprising: a step of detecting a value related to the illuminance of irradiated light; a step of setting a value of an illuminance threshold value based on position information of a current location; and the detecting step. Determining whether the illuminance is greater than or equal to the illuminance threshold based on the detected value, and executing a reception process of receiving a satellite signal from a position information satellite if the illuminance is greater than or equal to the illuminance threshold; It is characterized by providing.

According to the present invention, for example, when the electronic device moves to an area having a different latitude, a value corresponding to the latitude of the current location can be set as the illuminance threshold, so the illuminance threshold can be set to an appropriate value.
In addition, according to this, compared with the case where the illuminance threshold is changed only by increasing the illuminance threshold when reception fails and lowering the illuminance threshold when reception processing is not executed for a predetermined period of time, It is possible to reduce the possibility of reception failure before the illuminance threshold is set to an appropriate value, and to shorten the time until the illuminance threshold is set to an appropriate value.

  The present invention is a method for controlling an electronic device, the step of detecting a value related to the illuminance of the irradiated light, the step of setting a value of an illuminance threshold based on time information indicating the current time, and the detection A step of determining whether or not the illuminance is equal to or greater than the illuminance threshold based on the value detected in the step of performing a receiving process of receiving a satellite signal from a position information satellite if the illuminance is equal to or greater than the illuminance threshold; And.

According to the present invention, for example, since a value corresponding to the current month can be set as the illuminance threshold, the illuminance threshold can be set to an appropriate value.
In addition, according to this, compared with the case where the illuminance threshold is changed only by increasing the illuminance threshold when reception fails and lowering the illuminance threshold when reception processing is not executed for a predetermined period of time, It is possible to reduce the possibility of reception failure before the illuminance threshold is set to an appropriate value, and to shorten the time until the illuminance threshold is set to an appropriate value.

  The present invention is a method for controlling an electronic device, comprising: a step of detecting a value related to the illuminance of irradiated light; a step of setting a time threshold value based on position information of a current location; and the step of detecting Based on the detected value, it is determined whether the duration of the high illuminance state where the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold, and if the duration of the high illuminance state is equal to or greater than the time threshold, And a step of executing a reception process for receiving a satellite signal from a position information satellite.

According to the present invention, for example, when the electronic device moves to an area having a different latitude, a value corresponding to the latitude of the current location can be set as the time threshold, so that the time threshold can be set to an appropriate value.
Also, according to this, as compared with the case where the time threshold is changed only by increasing the time threshold when reception fails and shortening the time threshold when reception processing is not executed for a predetermined period, The possibility that reception may fail before the time threshold is set to an appropriate value can be reduced, and the time until the time threshold is set to an appropriate value can be shortened.

  The present invention relates to a method for controlling an electronic device, the step of detecting a value related to the illuminance of the irradiated light, the step of setting a time threshold value based on the current time, and the detection step. Based on the obtained value, it is determined whether or not the duration of the high illuminance state where the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold, and if the duration of the high illuminance state is equal to or greater than the time threshold, And a step of executing reception processing for receiving a satellite signal from an information satellite.

According to the present invention, for example, since a value corresponding to the current month can be set as the time threshold, the time threshold can be set to an appropriate value.
Also, according to this, as compared with the case where the time threshold is changed only by increasing the time threshold when reception fails and shortening the time threshold when reception processing is not executed for a predetermined period, The possibility that reception may fail before the time threshold is set to an appropriate value can be reduced, and the time until the time threshold is set to an appropriate value can be shortened.

  The present invention relates to a method for controlling an electronic device, the step of detecting a value related to the illuminance of irradiated light, and the values of the illuminance threshold and the time threshold based on time information indicating the current time and position information of the current location. And determining whether or not the duration of the high illuminance state in which the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold based on the value detected by the detecting step and the high illuminance A step of receiving a satellite signal from a position information satellite if the duration of the state is equal to or greater than the time threshold value.

According to the present invention, for example, values corresponding to the latitude of the current location and the current month can be set as the illuminance threshold and the time threshold, so the illuminance threshold and the time threshold can be set to appropriate values.
Further, according to this, the illuminance threshold value and the time threshold value are increased only when the illuminance threshold value and the time threshold value are increased when reception fails, and the illuminance threshold value and the time threshold value are decreased when reception processing is not executed for a predetermined period. Compared to changing the threshold value, the possibility of reception failure before each threshold value is set to an appropriate value can be reduced, and the time until each threshold value is set to an appropriate value is shortened. it can.

1 is a schematic diagram showing an electronic timepiece according to a first embodiment of the present invention. The front view of the electronic timepiece in 1st Embodiment. Sectional drawing of the electronic timepiece in 1st Embodiment The block diagram which shows the circuit structure of the electronic timepiece in 1st Embodiment. The figure which shows the data structure of the memory | storage device in 1st Embodiment. The figure which shows the threshold value data in 1st Embodiment. The flowchart which shows the automatic reception process in 1st Embodiment. The figure explaining the operation timing of charge condition detection, open circuit voltage detection, and reception processing. The graph which shows the relationship between the illumination intensity of the light which hits a solar cell, and the open circuit voltage of a solar cell. The graph which shows the relationship between the illumination intensity of the light which hits a solar cell, and the short circuit current of a solar cell. The figure which shows the relationship between the open voltage in the solar cell in each detection level, and the illumination intensity of the light which hits a solar cell. The figure which shows the relationship between the frequency | count of determination and determination time. The graph which shows transition of the illumination intensity of the light which hits a solar cell. The figure which shows the relationship between reception conditions (state 1) and a reception result. The figure which shows the relationship between reception conditions (state 2) and a reception result. The figure which shows the relationship between reception conditions (state 3) and a reception result. The figure which shows the threshold value data of 2nd Embodiment which concerns on this invention. The figure which shows the threshold value data of 3rd Embodiment which concerns on this invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is a schematic view showing an electronic timepiece 1 of the present embodiment.
An electronic timepiece 1 as an electronic device receives a satellite signal from at least one GPS satellite 100 among a plurality of GPS satellites 100 orbiting the earth in a predetermined orbit, acquires time information, and at least It is configured to receive satellite signals from the three GPS satellites 100 and calculate and acquire position information. The GPS satellite 100 is an example of a position information satellite, and a plurality of GPS satellites 100 exist over the earth. Currently, about 30 GPS satellites 100 orbit.

[Schematic configuration of electronic watch]
FIG. 2 is a front view of the electronic timepiece 1, and FIG. 3 is a cross-sectional view showing an outline of the electronic timepiece 1.
As shown in FIGS. 2 and 3, the electronic timepiece 1 includes an exterior case 30, a cover glass 33, and a back cover 34. The exterior case 30 is configured by fitting a bezel 32 made of ceramic to a cylindrical case 31 made of metal. On the inner peripheral side of the bezel 32, a disk-shaped dial plate 11 is disposed as a time display portion via a ring-shaped dial ring 35 formed of plastic.
From the center of the dial 11, an A button 2 is provided at a position at 2 o'clock, a B button 3 is provided at a position at 4 o'clock, and a crown 4 is provided at a position at 3 o'clock. Yes. Here, the A button 2, the B button 3, and the crown 4 are examples of the operation unit of the present invention.

In the electronic timepiece 1, as shown in FIG. 3, the opening on the front surface side of the two openings of the metal case 31 is closed by the cover glass 33 via the bezel 32, and the opening on the back surface side is It is closed by a back cover 34 made of metal.
Inside the outer case 30, a dial ring 35 attached to the inner periphery of the bezel 32, a light-transmitting dial 11, hands 21, 22, 23, 24, 25, 26, 27, 28, A calendar wheel 20 and a driving mechanism 140 for driving the hands and the calendar wheel 20 are provided.

  The dial ring 35 has an outer peripheral end that is in contact with the inner peripheral surface of the bezel 32, a flat plate portion that is parallel to the cover glass 33, and an inner peripheral end that is in contact with the dial 11. An inclined portion inclined toward the plate 11 side is provided. The dial ring 35 has a ring shape in a plan view and a mortar shape in a cross-sectional view. A donut-shaped storage space is formed by the flat plate portion of the dial ring 35, the inclined portion, and the inner peripheral surface of the bezel 32, and the ring-shaped antenna body 110 is stored in the storage space.

The dial 11 is a circular plate that displays the time inside the outer case 30, is formed of a light-transmitting material such as plastic, and includes dials 21 to 28 between the cover glass 33 and the dial ring. 35 is disposed inside.
A solar cell 135 that performs photovoltaic power generation is provided between the dial plate 11 and the ground plate 125 to which the drive mechanism 140 is attached. The solar cell 135 is a circular flat plate in which a plurality of photovoltaic elements that convert light energy into electrical energy are connected in series. The dial plate 11, the solar cell 135, and the ground plate 125 are formed with holes through which the pointer shafts 29 of the pointers 21 to 23 and the pointer shafts (not shown) of the hands 24 to 28 pass. Further, the dial 11 and the solar cell 135 are formed with openings of the calendar small windows 15.

The drive mechanism 140 is attached to the ground plane 125 and is covered with the circuit board 120 from the back side. The drive mechanism 140 has a step motor and a wheel train such as a gear, and the step motor drives each pointer by rotating the pointer shaft 29 and the like through the wheel train.
Specifically, the drive mechanism 140 includes first to sixth drive mechanisms. The first drive mechanism drives the hands 22 and 23, the second drive mechanism drives the hands 21, the third drive mechanism drives the hands 24, the fourth drive mechanism drives the hands 25, and the fifth drive. The mechanism drives the hands 26 to 28, and the sixth drive mechanism drives the calendar wheel 20.

  The circuit board 120 includes a GPS receiving circuit 45, a control circuit 50, and a storage device 60. Further, the circuit board 120 and the antenna body 110 are connected by using antenna connection pins 115. On the back cover 34 side of the circuit board 120 on which the GPS receiving circuit 45, the control circuit 50, and the storage device 60 are provided, a circuit presser 122 for covering these circuit components is provided. A secondary battery 130 such as a lithium ion battery is provided between the ground plate 125 and the back cover 34. The secondary battery 130 is charged with electric power generated by the solar cell 135.

[Electronic watch display mechanism]
On the inner peripheral side of the dial ring 35 that surrounds the outer peripheral portion of the dial plate 11, a scale that divides the inner periphery into 60 divisions is shown as shown in FIG. Using this scale, the hand 21 displays “second” of the first time at normal time, the hand 22 displays “minute” of the first time, and the hand 23 displays “hour” of the first time. Since the “second” of the first time is the same as the “second” of the second time described later, the user can grasp the “second” of the second time by checking the pointer 21.
The dial ring 35 has an alphabet “Y” at the 12-minute position and an alphabet “N” at the 18-minute position. The letters indicate reception (acquisition) results (Y: reception (acquisition) success, N: reception (acquisition) failure) of various information based on the satellite signal received from the GPS satellite 100. The pointer 21 indicates either “Y” or “N” and displays the reception result of the satellite signal. The reception result is displayed by pressing the A button 2 for less than 3 seconds.

  The pointer 24 is provided at a position in the 2 o'clock direction from the center of the dial 11. The letters “S”, “M”, “T”, “W”, “T”, “F”, and “S” indicating seven days are written on the outer periphery of the rotation area of the pointer 24. The pointer 24 displays the day of the week by instructing one of “S” to “S”.

The pointer 25 is provided at a position in the 10 o'clock direction from the center of the dial 11. Hereinafter, the notation of the outer periphery of the rotation region of the pointer 25 will be described. The “n hour direction” (n is an arbitrary natural number) is the direction when the outer periphery of the rotation region is viewed from the pointer axis of the pointer 25. .
On the outer periphery of the range of rotation of the pointer 25 from the 6 o'clock direction to the 7 o'clock direction, an English letter “DST” and a symbol “◯” are written. DST (daylight saving time) means daylight saving time. The pointer 25 indicates the setting of daylight saving time (DST: daylight saving time ON, ○: daylight saving time OFF) by indicating these letters and symbols.

  On the outer periphery of the rotation region of the pointer 25 from the 8 o'clock direction to the 9 o'clock direction, there is a crescent-shaped symbol 12 having a thick base end in the 9 o'clock direction and a thin tip in the 8 o'clock direction along the circumference. It is written. This symbol 12 is a power indicator of the secondary battery 130 (see FIG. 3), and the remaining battery level is displayed when the pointer 25 indicates a position corresponding to the remaining battery level. The pointer 25 indicates the symbol 12 at normal times.

  An airplane-shaped symbol 13 is written on the outer periphery of the rotation region of the pointer 25 in the 10 o'clock direction. This symbol represents the airplane mode. When aircraft take off and landing, the reception of satellite signals is prohibited by the Aviation Law. The pointer 25 indicates that the in-flight mode is set and no reception is performed by designating the symbol 13.

  A number “1” and a symbol “4+” are written on the outer periphery of the rotation region of the pointer 25 from the 11 o'clock direction to the 12 o'clock direction. These numbers and symbols represent satellite signal reception modes. “1” receives time information and the internal time is corrected (timekeeping mode), “4+” receives time information and orbit information, calculates position information that is the current position, This means that time zone data to be described later is corrected (positioning mode).

The hands 26 and 27 are provided at a position in the 6 o'clock direction from the center of the dial 11. The hand 26 displays “minute” of the second time, and the hand 27 displays “hour” of the second time.
The pointer 28 is provided at a position in the 4 o'clock direction from the center of the dial 11 and displays the morning and afternoon of the second time.
The calendar small window 15 is provided in the opening part which opened the dial 11 in the rectangular shape, and the number printed on the calendar wheel 20 can be visually recognized from the opening part. This number represents the “day” of the date.

Also, on the dial ring 35, time difference information 37 representing a time difference with Coordinated Universal Time (UTC) is indicated by numerals and symbols other than numbers along the inner scale. The numerical time difference information 37 represents an integer time difference, and the symbol time difference information 37 represents a time difference other than an integer. The time difference between the first time displayed by the hands 21 to 23 and UTC can be confirmed by the time difference information 37 indicated by the hand 21 by pressing the B button 3.
Further, the bezel 32 provided around the dial ring 35 includes city information 36 representing the representative city name of the time zone using the standard time corresponding to the time difference of the time difference information 37 written on the dial ring 35. Is also written in the time difference information 37.

[Circuit configuration of electronic watch]
FIG. 4 is a block diagram showing a circuit configuration of the electronic timepiece 1. As shown in this figure, the electronic timepiece 1 includes a solar cell 135, a secondary battery 130, a GPS receiving circuit 45, a time measuring device 46, a storage device 60, an input device 47, a control circuit 50, a diode. 41, a charge control switch 42, a charge state detection circuit 43, and a voltage detection circuit 44. The configuration including the solar cell 135, the charge state detection circuit 43, and the voltage detection circuit 44 is an example of the illuminance detection unit of the present invention.

  The diode 41 is provided in a path that electrically connects the solar cell 135 and the secondary battery 130, and without interrupting the current (forward current) from the solar cell 135 to the secondary battery 130, the secondary battery 130. To the solar cell 135 (reverse current). Note that the forward current flows only when the voltage of the solar cell 135 is higher than the voltage of the secondary battery 130, that is, during charging. Further, a field effect transistor (FET) may be employed instead of the diode 41.

The charge control switch 42 connects and disconnects a current path from the solar cell 135 to the secondary battery 130, and is a switching provided in a path that electrically connects the solar cell 135 and the secondary battery 130. An element 421 is provided. When the switching element 421 transitions from the off state to the on state, it is turned on (connected), and when the switching element 421 transitions from the on state to the off state, it is turned off (disconnected).
For example, when the battery voltage of the secondary battery 130 is equal to or higher than a predetermined value so that the battery characteristics do not deteriorate due to overcharging, the charging is performed based on the binary control signal CTL3 output from the control circuit 50. The control switch 42 is turned off. In this case, the operation of the voltage detection circuit 44 described later is stopped based on the control signal CTL2 output from the control circuit 50.

  The switching element 421 is a p-channel transistor, and is turned on when the gate voltage Vg1 is at a low level, and turned off when the gate voltage Vg1 is at a high level. The gate voltage Vg1 is controlled by the control circuit 50.

  The charging state detection circuit 43 operates based on a binary control signal CTL1 that specifies the detection timing of the charging state output from the control circuit 50, and the charging state (charging state) from the solar cell 135 to the secondary battery 130 is performed. ) And the detection result RS1 is output to the control circuit 50. The state of charge is “charging” or “not charging”, and the detection is performed based on the battery voltage VCC and the PVIN of the solar cell 135 when the charge control switch 42 is on. For example, when the voltage drop of the diode 41 is Vth and the on-resistance of the switching element 421 is ignored, it is determined as “charging” when PVIN−Vth> VCC, and “non-display” when PVIN−Vth ≦ VCC. It can be determined that charging is in progress.

  In the present embodiment, the control signal CTL1 is a pulse signal having a cycle of 1 second, and the charge state detection circuit 43 detects the charge state during a period in which the control signal CTL1 is at a high level. That is, the charge state detection circuit 43 repeatedly detects the charge state at a cycle of 1 second while maintaining the charge control switch 42 in the connected state.

  The reason why the state of charge is detected intermittently is to reduce the amount of power consumed by the state of charge detection circuit 43. If this reduction is unnecessary, the state of charge may be detected continuously. The charge state detection circuit 43 can be configured using, for example, a comparator, an A / D converter, or the like.

  The voltage detection circuit 44 operates based on a binary control signal CTL2 that specifies the detection timing of the voltage output from the control circuit 50, and detects the terminal voltage PVIN of the solar cell 135, that is, the open voltage of the solar cell 135. . During the period when the voltage detection circuit 44 detects the open circuit voltage, the charge control switch 42 is turned off based on the control signal CTL3 output from the control circuit 50. Further, the voltage detection circuit 44 outputs the detection result RS2 of the open circuit voltage to the control circuit 50.

A GPS receiving circuit 45 serving as a receiving unit is connected to the antenna body 110 and processes satellite signals received via the antenna body 110 to acquire time information and position information.
Although not shown, the GPS receiving circuit 45 receives a satellite signal transmitted from the GPS satellite 100 and converts it into a digital signal, as in a normal GPS device, and a received signal Information acquisition for obtaining and outputting time information and position information (positioning information) from the navigation message (satellite signal) demodulated by the BB unit (baseband unit) that performs correlation determination and demodulates the navigation message Means.

  The input device 47 includes the A button 2, the B button 3, and the crown 4 shown in FIG. 2, and executes various processes based on the pressing and releasing of the buttons 2 and 3 and the pulling and pushing of the crown 4. An operation to be instructed is detected, and an operation signal corresponding to the detected operation is output to the control circuit 50.

  The time measuring device 46 includes a crystal resonator driven by the electric power stored in the secondary battery 130, and updates time data using a reference signal based on an oscillation signal of the crystal resonator.

As illustrated in FIG. 5, the storage device 60 includes a time data storage unit 610, a time zone data storage unit 620, a position information storage unit 630, and a threshold storage unit 640.
The time data storage unit 610 includes reception time data 611, leap second update data 612, internal time data 613, first display time data 614, second display time data 615, and first time zone data. 616 and second time zone data 617 are stored.
The reception time data 611 stores time information (GPS time) acquired from satellite signals. The reception time data 611 is normally updated every second by the timing device 46, and when the satellite signal is received, the acquired time information (GPS time) is stored.
The leap second update data 612 stores at least current leap second data. That is, in subframe 4 and page 18 of the satellite signal, “current leap second”, “leap second update week”, “leap second update date”, and “leap second after update” are included as data relating to leap seconds. Each data is included. Among these, in the present embodiment, at least “current leap second” data is stored in the leap second update data 612.

  Internal time information is stored in the internal time data 613. This internal time information is updated by the GPS time stored in the reception time data 611 and the “current leap second” stored in the leap second update data 612. That is, the internal time data 613 stores UTC (Coordinated Universal Time). When the reception time data 611 is updated by the timing device 46, the internal time information is also updated.

The first display time data 614 stores time information obtained by adding the time zone data (time difference information) of the first time zone data 616 to the internal time information of the internal time data 613. The first time zone data 616 is set as time zone data obtained when the user manually selects or receives in the positioning mode. Here, the time information of the first display time data 614 corresponds to the first time displayed by the hands 21 to 23.
The second display time data 615 stores time information obtained by adding the time zone data of the second time zone data 617 to the internal time information of the internal time data 613. The second time zone data 617 is set as time zone data obtained when the user manually selects. Here, the time information of the second display time data 615 corresponds to the second time displayed by the hands 21, 26 to 28.

  The time zone data storage unit 620 stores position information (latitude, longitude) and time zone data (time difference information) in association with each other. For this reason, when the position information is acquired in the positioning mode, the control circuit 50 can acquire the time zone data based on the position information (latitude, longitude).

  The time zone data storage unit 620 further stores a city name and time zone data in association with each other. Therefore, when the user selects a city name for which the local time is desired by operating the crown 4, the control circuit 50 searches the time zone data storage unit 620 for the city name set by the user and corresponds to the city name. Time zone data to be acquired is acquired and set in the first time zone data 616 or the second time zone data 617.

  The location information storage unit 630 stores location information of the current location. Specifically, the latitude received by the GPS receiving circuit 45 receiving a satellite signal and performing a positioning calculation based on the satellite signal, or the latitude of the city selected according to the operation of the crown 4 is used as the position information. Remembered.

The threshold value storage unit 640 stores threshold value data.
As shown in FIG. 6, latitude, threshold level, and threshold number are stored in the threshold data in association with each other.
In the example of FIG. 6, the threshold data stores 26 °, 50 °, and 70 ° as latitudes in the northern hemisphere, and −26 °, −50 °, and −70 ° as latitudes in the southern hemisphere.
The threshold level and the threshold number determine the reception conditions for the control circuit 50 to execute the automatic reception process. As will be described in detail later, the control circuit 50 detects the open voltage of the solar cell 135 detected by the voltage detection circuit 44. When the detected level becomes equal to or higher than the threshold level continuously for the threshold number of times, the GPS reception circuit 45 is operated to execute the automatic reception process.
As shown in FIG. 6, the lower the latitude, the higher the corresponding threshold level and the higher the corresponding threshold number.

The control circuit 50 includes a CPU that controls the electronic timepiece 1. The control circuit 50 executes various programs stored in the storage device 60, so that an automatic reception control unit 51, a manual reception control unit 52, a time zone setting unit 53, a time correction unit 54, a threshold setting unit 55, position information It functions as the setting unit 56.
The automatic reception control unit 51 operates the GPS reception circuit 45 to execute the reception process in the timekeeping mode when the reception condition that is a condition for executing the reception is satisfied (automatic reception process). Here, the automatic reception control unit 51 is an example of a reception control unit of the present invention. Details of the automatic reception process will be described later.
When the manual reception control unit 52 detects that the A button 2 is pressed for 3 seconds or more and less than 6 seconds based on the output signal of the input device 47, the manual reception control unit 52 operates the GPS reception circuit 45 to perform reception processing in the timekeeping mode. (Manual reception processing in timekeeping mode). When it is detected that the A button 2 has been pressed for 6 seconds or longer, the GPS reception circuit 45 is operated to execute the reception process in the positioning mode (manual reception process in the positioning mode).

When the reception process in the timekeeping mode is executed, the GPS receiving circuit 45 acquires at least one GPS satellite 100, receives a satellite signal transmitted from the GPS satellite 100, and acquires time information.
When the reception processing in the positioning mode is executed, the GPS receiving circuit 45 captures at least three, preferably four or more GPS satellites 100, receives satellite signals transmitted from the respective GPS satellites 100, and positions them. Calculate and obtain information. The GPS receiving circuit 45 can also acquire time information at the same time when a satellite signal is received.

The time zone setting unit 53 sets time zone data based on the acquired position information (latitude, longitude) when the position information is successfully acquired in the reception process in the positioning mode. Specifically, time zone data (time zone information, that is, time difference information) corresponding to the position information is selected and acquired from the time zone data storage unit 620 and stored in the first time zone data 616.
For example, since Japan Standard Time (JST) is a time (UTC + 9) that is 9 hours ahead of UTC, when the acquired location information is Japan, the time zone setting unit 53 includes the time zone data storage unit 620. The time difference information (+9 hours) in Japan standard time is read out from the first time zone data 616 and stored.
In addition, when either the time difference information 37 or the city information 36 is selected by the operation of the operation unit, the time zone setting unit 53 sets the time zone data corresponding to the selected time difference information 37 or the city information 36 as the first time zone data. The first time zone data 616 or the second time zone data 617 is stored.

The time correction unit 54 stores the acquired time information in the reception time data 611 when acquisition of time information is successful in the reception processing in the time measurement mode or the positioning mode. Thereby, the internal time data 613, the first display time data 614, and the second display time data 615 are corrected.
Further, the time correction unit 54 corrects the first display time data 614 using the first time zone data 616 and corrects the second display time data 615 using the second time zone data 617. Therefore, the first display time data 614 and the second display time data 615 are times obtained by adding each time zone data to the internal time data 613 that is UTC.

  The threshold setting unit 55 sets the threshold level and the threshold number for determining the reception condition for executing the automatic reception process based on the position information stored in the position information storage unit 630. Details of the threshold level and threshold number setting method will be described later.

When the GPS reception circuit 45 executes the reception process in the positioning mode and acquisition of the position information is successful, the position information setting unit 56 overwrites and stores the latitude of the position information in the position information storage unit 630. If the latitude of the position information acquired by the GPS receiving circuit 45 is the same as the latitude stored in the position information storage unit 630, the position information storage unit 630 is not updated.
Further, when the user operates the crown 4 to select the city information by instructing the pointer 21 with the city information 36, the location information setting unit 56 displays the city information according to the selection operation. Select and get the latitude corresponding to the selected city information. Then, the acquired latitude is overwritten and stored in the position information storage unit 630.

[Automatic reception processing]
Next, automatic reception processing executed by the electronic timepiece 1 will be described based on the flowchart of FIG.
The control circuit 50 starts control at 0:00, 0 seconds every day. First, the automatic reception control unit 51 operates the charge state detection circuit 43 at a constant cycle (SA1). In the present embodiment, as shown in FIG. 8, the control circuit 50 outputs a control signal CTL1 at intervals of 1 second, and operates the charge state detection circuit 43. When the control signal CTL1 is input, the charging state detection circuit 43 outputs a detection result RS1 indicating whether or not the charging state is present to the control circuit 50. For this reason, the automatic reception control unit 51 determines whether or not charging is in progress (SA2). The charge control switch 42 is switched off only at the timing when the voltage detection circuit 44 is operated, as will be described later.

[Control in non-charged state]
When the light hitting the electronic timepiece 1 is dark and no power generation is performed in the solar cell 135, the charging state detection circuit 43 outputs a detection result RS <b> 1 of “not charging” to the control circuit 50. In this case, the automatic reception control unit 51 determines that charging is not being performed (SA2: No), and outputs a low-level control signal CTL2 from the control circuit 50.
Therefore, when it is determined No in SA2, the automatic reception control unit 51 can determine that there is a high possibility that the electronic timepiece 1 is not disposed outdoors and is not disposed in a location suitable for receiving satellite signals. .

[Control while charging]
On the other hand, the automatic reception control unit 51 operates the voltage detection circuit 44 (SA3) when it is determined in SA2 that the battery is charged (SA2: Yes). At this time, the charging control switch 42 is switched to the off state by the automatic reception control unit 51. That is, when the automatic reception control unit 51 detects that the charging state detection circuit 43 is charging, the automatic reception control unit 51 outputs the control signal CTL2 at intervals of 1 second and operates the voltage detection circuit 44. At this time, since the charge control switch 42 is controlled to be turned off by the control signal CTL3 from the control circuit 50, the solar cell 135 and the voltage detection circuit 44 are disconnected from the secondary battery 130. For this reason, the voltage detection circuit 44 can detect an open voltage corresponding to the illuminance of light hitting the solar cell 135 without being affected by the charging voltage of the secondary battery 130.
When the charge control switch 42 is off, the charge state cannot be detected by the charge state detection circuit 43. Therefore, the automatic reception control unit 51 sets the control signal CTL1 and the control signal CTL2 so that the output timing of the control signal CTL1 to the charging state detection circuit 43 and the output timing of the control signal CTL2 to the voltage detection circuit 44 do not match. The output timing is shifted.

In the present embodiment, the open circuit voltage detected by the voltage detection circuit 44 increases as the illuminance in the solar cell 135 increases, as shown in FIG.
Further, instead of the open voltage of the solar cell 135, a configuration in which the short-circuit current of the solar cell 135 is detected as a value corresponding to the illuminance of light hitting the solar cell 135 may be used. That is, as shown in FIG. 10, a configuration may be applied in which a short-circuit current that increases as the illuminance in the solar cell 135 increases is detected. In the configuration for detecting the short-circuit current, similarly to the configuration for detecting the open-circuit voltage, the secondary battery 130 is electrically disconnected by turning off the charging control switch 42 and electrically disconnecting the secondary battery 130. It is necessary to avoid the influence of the battery 130.
Such an open circuit voltage and a short circuit current have a correlation with an output value in the solar cell 135. Therefore, in this embodiment, an open circuit voltage or a short circuit current is detected as a detection value. That is, the open circuit voltage and the short circuit current are examples of values relating to the illuminance of the present invention.

  The automatic reception control unit 51 determines the detection level corresponding to the open circuit voltage based on the detection result RS2 output from the voltage detection circuit 44 (SA4). In the present embodiment, the automatic reception control unit 51 determines the detection level based on the relationship shown in FIG. Note that the open circuit voltage and illuminance in FIG. 11 represent the lower limit values at each detection level. For example, the automatic reception control unit 51 has a detection level of “7” when the open circuit voltage is 5.6 V or more and less than 5.8 V, and when the open voltage is 5.9 V or more and less than 6.2 V, the detection level is “9”. Judge that there is.

  Next, as shown in FIG. 7, the automatic reception control unit 51 determines whether or not the detection level obtained in SA4 is continuously equal to or higher than the threshold level for the threshold number of times or more based on the voltage detection at 1 second intervals. Is determined (SA5). Although the threshold level and the number of thresholds will be described later in detail, they can be set in a plurality of stages and are set in advance by the threshold setting unit 55.

Since the relationship between the detection level and the illuminance of light hitting the solar cell 135 has a correlation as shown in FIG. 11, it is determined whether the detection level is equal to or higher than the threshold level. It can be determined whether or not the illuminance is in a high illuminance state where the illuminance is equal to or greater than the illuminance threshold. For example, when the threshold level is set to “4”, it is determined whether or not the illuminance of light hitting the solar cell 135 is equal to or greater than 3000 lux by determining whether or not the detection level is equal to or greater than the threshold level. it can.
Note that the relationship between the detection level and the illuminance of light hitting the solar cell 135 is not limited to the relationship shown in FIG. 11 and can be set as appropriate.

The number of determinations based on voltage detection and the determination time have the relationship shown in FIG. In addition, the relationship of FIG. 12 has shown the case where an open circuit voltage is detected at intervals of 1 second. For example, when the number of determinations is “2”, the determination time is 2 seconds. For this reason, it can be determined whether the continuation time of a high illumination state is more than a time threshold value by determining whether a detection level is more than a threshold level continuously and more than a threshold level.
Note that the relationship between the number of determinations and the determination time is not limited to the relationship shown in FIG. 12, but changes according to the voltage detection interval. For example, when the open circuit voltage is detected at intervals of 2 seconds, if the number of determinations is “2”, the determination time is 4 seconds.

  When it is determined No in SA2 or SA5, the automatic reception control unit 51 determines whether or not the current time is 23:59:59 on the day when the control circuit 50 starts control (SA6). When it is determined No in SA6, the automatic reception control unit 51 returns to SA1 and operates the charge state detection circuit 43 at a constant cycle.

  On the other hand, when it is determined Yes in SA6, the threshold setting unit 55 resets the threshold level to be one level lower (SA7). That is, the illuminance threshold is changed to a value that is one level lower. And the control circuit 50 complete | finishes a process, and transfers to a standby state until the control resumption time when a process is started next. Here, the control resumption time is 0 hour 0 minute 0 second after 1 second. When the state where the detection level continuously exceeds the threshold level for the predetermined number of times does not occur for a predetermined period, the detection level is set to be lower than the threshold level by resetting the threshold level to be one level lower. It becomes easy to become. As described above, since the conditions for operating the GPS receiving circuit 45 are more relaxed, an opportunity to operate the GPS receiving circuit 45 can be provided.

On the other hand, when it is determined Yes in SA5, the automatic reception control unit 51 determines that the electronic timepiece 1 is placed outdoors and is in an environment suitable for reception, and operates the GPS reception circuit 45 to operate GPS. Reception processing for receiving a satellite signal from the satellite 100 is started (SA8).
In the automatic reception process, the reception process in the timekeeping mode is performed. That is, in the positioning mode, signals must be received from three or more GPS satellites 100 in order to detect the position, and the reception processing time becomes long. For this reason, it is preferable to place the electronic timepiece 1 outdoors until the signal reception is completed. However, in the automatic reception process, the user does not notice that the signal is being received and moves indoors even during reception. There is also a risk. For this reason, it is preferable that the reception in the positioning mode is performed only when the user intentionally performs a reception operation, that is, only during the manual reception process.
On the other hand, in the timekeeping mode, time information can be acquired even by receiving a signal from one GPS satellite 100, and the reception processing time can be shortened. Therefore, even if the user does not intend, the reception process can be executed, which is suitable for the automatic reception process.

Next, the threshold setting unit 55 determines whether or not the reception is successful by the reception process started in SA8 (SA9).
The GPS receiving circuit 45 first searches for the GPS satellite 100, and the GPS receiving circuit 45 detects the satellite signal. When the satellite signal is detected (when the GPS satellite 100 is captured), the satellite signal is continuously received and the time information is received. When the time information can be received in this way, it is determined that the reception is successful. In other cases, that is, when a satellite signal is not detected by the GPS receiving circuit 45 or when time information cannot be received, it is determined that reception has failed.
If it is determined that the reception has succeeded (SA9: Yes), the control circuit 50 ends the process and shifts to a standby state until 00: 00: 0 on the next day, which is the control resumption time.

  On the other hand, when it is determined that the reception has failed (SA9: No), the threshold setting unit 55 resets the threshold level so as to increase by one level (SA10). That is, the illuminance threshold is changed to a value one level higher. And the control circuit 50 complete | finishes a process and transfers to a standby state until control resumption time. In this way, when the SA1 process is resumed from 00: 00: 00: 00 on the next day, the threshold level is increased by one level, so that the detection level is less likely to be higher than the threshold level. As described above, when the reception fails, the GPS receiving circuit 45 can be operated in an environment suitable for receiving satellite signals by making the conditions for operating the GPS receiving circuit 45 more stringent.

[Threshold setting process]
Next, threshold setting processing executed by the electronic timepiece 1 will be described.
According to the electronic timepiece 1, when the user moves to an area with a different latitude, for example, the user operates the operation unit of the electronic timepiece 1 to execute manual reception processing in the positioning mode, or selects city information. The latitude of the current location can be stored in the position information storage unit 630.
Then, the threshold value setting unit 55 receives the position information from the position information storage unit 630 when the position information of the position information storage unit 630 is updated or when a preset threshold setting timing such as once every two days is reached. Read a latitude.

Then, the threshold setting unit 55 sets the threshold level and the threshold number based on the read latitude and the relationship between the latitude stored in the threshold storage unit 640, the threshold level, and the threshold number.
Specifically, the threshold setting unit 55 determines the latitude closest to the latitude read from the position information storage unit 630 among the latitudes stored in the threshold storage unit 640. Then, the threshold level and the threshold number associated with the determined latitude are set to the threshold level and the threshold number.
For example, in the example of FIG. 6, when the read latitude is 35 °, for example, the threshold setting unit 55 has a threshold level “4” and a threshold count “4” associated with 26 °, which is the latitude closest to 35 °. Is set to the threshold level and the threshold count.
According to such a threshold setting process, the threshold level and the threshold number can be set to values corresponding to the latitude of the current location.

Here, the energy of sunlight changes according to the latitude. For example, the energy of sunlight in a low latitude region is larger than the energy of sunlight in a high latitude region.
Since the appropriate threshold level is a lower limit value of the detection level that can be determined to be outdoors, the appropriate threshold level changes when the energy of sunlight changes. For example, as the energy of sunlight increases, the energy of sunlight that enters from a window indoors also increases. Therefore, the threshold level needs to be increased in order to avoid performing reception processing indoors. For this reason, an appropriate threshold level changes according to the latitude.
According to the electronic timepiece 1, when the electronic timepiece 1 moves to an area with a different latitude, the threshold level can be set to a value corresponding to the latitude of the current location by the above threshold setting process, so the threshold level is set to an appropriate value. it can.

Also, the appropriate threshold number varies depending on the latitude.
FIG. 13 is a graph showing an example of a change in illuminance of light irradiated on the solar cell 135 when the user carrying the electronic timepiece 1 passes through the window (a position about 1 m away from the window) indoors. It is.
Since the energy of sunlight is larger in the low-latitude area than in the high-latitude area, the range in which sunlight with an intensity equal to or greater than the illuminance threshold is radiated is wide at the indoor window. For this reason, as shown in FIG. 13, when the user carrying the electronic timepiece 1 passes by the window, the time when the solar cell 135 is irradiated with light of an illuminance threshold (for example, 3000 lux) or more is higher than that in the high latitude region. The lower latitude area is longer. That is, the number of times that the high illuminance state is detected is greater in the low latitude region than in the high latitude region.
According to the electronic timepiece 1, when the electronic timepiece 1 moves to an area having a different latitude, the threshold count can be set to a value corresponding to the latitude of the current location, and thus the threshold count can be set to an appropriate value.

Here, in the example of FIG. 13, for example, a reception result when the illuminance threshold is set to 4000 lux and the time threshold is set to 10 seconds (state 1) will be described.
FIG. 14A is a diagram illustrating a reception result of state 1. 14A to 14C, “◯” indicates reception success (threshold is appropriate), “×” indicates reception failure (threshold is inappropriate), “−” indicates that reception processing is not executed, “◎” indicates that reception is performed better than “◯”.
In the case of the state 1, in the low-latitude area, there is a case where light having an illuminance threshold (4000 lux) or more is continuously irradiated for 10 seconds or more at the indoor window, and reception processing may be executed indoors. Therefore, reception may fail.
Further, in a high latitude area, light exceeding the illuminance threshold value is not continuously emitted for 10 seconds or more at the indoor window, so that it is possible to avoid receiving processing indoors.

In order to avoid the reception process being executed indoors in the low latitude area with respect to the state 1, the time threshold value in the low latitude area may be increased from 10 seconds to, for example, 20 seconds (state 2).
FIG. 14B is a diagram illustrating a reception result of state 2.
In the case of the state 2, in the low latitude area, the light exceeding the illuminance threshold is not continuously irradiated for 20 seconds or more at the indoor window, so the reception processing is performed indoors by setting the time threshold to 20 seconds. Can be avoided and the success rate of reception can be improved.
Note that by increasing the illuminance threshold, it is possible to make it difficult for the reception process to be performed indoors. However, in this case, even if the electronic timepiece 1 is placed outdoors, the solar cell 135 is irradiated on a rainy day or the like. The illuminance of the emitted light does not exceed the illuminance threshold, the reception process may not be executed, and the reception frequency outdoors may be low. In such a case, as described above, it is preferable to improve the indoor reception success rate and to suppress the outdoor reception frequency from decreasing by changing the time threshold.
In the case of the state 2, in a low-latitude area, for example, when the electronic timepiece 1 comes out of the shadow of a building and immediately hides in the shadow of another building, the time for receiving satellite signals is short and it is outdoors. Can reduce the possibility that the reception process is executed in a situation where the reception is not successful. For this reason, the outdoor reception success rate can be further improved.

Furthermore, in order to increase the reception frequency outdoors in the high latitude region with respect to the state 2, the illuminance threshold value in the high latitude region may be lowered from 4000 lux to, for example, 3000 lux (state 3).
FIG. 14C is a diagram illustrating a reception result of state 3.
In the case of the state 3, the reception frequency can be increased outdoors in a high-latitude region, so that reception can be performed more appropriately. Further, in a high latitude area, light exceeding an illuminance threshold (3000 lux) is not continuously irradiated for 10 seconds or more at the indoor window, so that it is possible to avoid receiving processing indoors.
Thus, the reception condition can be set more appropriately by changing not only the time threshold but also the illuminance threshold.

[Effects of First Embodiment]
When the electronic timepiece 1 moves to an area having a different latitude, values corresponding to the latitude of the current location can be set as the threshold level and the threshold number, so that the threshold level and the threshold number can be set to appropriate values.
Also, according to this, the threshold level and the threshold count are increased when reception fails, and the threshold level and threshold count are decreased only when reception processing is not executed for a predetermined period (for example, 24 hours). Compared with the case where the threshold level and the threshold number are changed, the possibility of failure in reception before the threshold level and the threshold number are set to appropriate values can be reduced, and the power consumption can be reduced. Furthermore, the time until the threshold level and the threshold number are set to appropriate values can be shortened.

Since the GPS reception circuit 45 executes the reception process in the positioning mode, the latitude of the current location can be acquired. For example, it is not necessary for the user to set the latitude of the current location by operating the operation unit, and convenience can be improved. .
Further, since the position information in the position information storage unit 630 has been updated immediately before, the electronic timepiece 1 has not moved, and the latitude of the position information output from the GPS receiving circuit 45 is stored in the position information storage unit 630. If the latitude is the same, the position information in the position information storage unit 630 is not updated, and the threshold level and the threshold number are not set. According to this, the processing load can be reduced as compared with the case where the setting is always performed every time position information is output from the GPS receiving circuit 45.
In addition, the user can set the latitude of the current location by selecting the city information of the current location by operating the operation unit. For example, compared with the case of setting the latitude directly by operating the operation unit Can be easily performed.

  When reception fails, the threshold level and the threshold count increase. When the reception process is not executed for a predetermined period, the threshold level and threshold count decrease. For example, the current location latitude is set in the position information storage unit 630. Even if appropriate values are not set for the threshold level and the threshold count, the values can be changed according to the usage environment, so that the reception success rate can be improved and the reception process is not executed for a long time. Can be avoided.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
In the electronic timepiece 1 of the first embodiment, the threshold level and the threshold number are set according to the latitude of the current location, but in the electronic timepiece of the present embodiment, they are set according to the current month. Since the other configuration is the same as that of the first embodiment, the detailed description thereof is omitted or simplified.

In the electronic timepiece of the present embodiment, as shown in FIG. 15, the threshold value data of the threshold value storage unit 640 stores the month range, the threshold level, and the threshold number in association with each other.
In the example of FIG. 15, four ranges of March to May (spring), June to August (summer), September to November (autumn), and December to February (winter) are stored as month ranges. Yes.
As shown in FIG. 15, the corresponding threshold level is higher in summer than in winter, and the corresponding threshold number is increased. In addition, a threshold level between summer and winter and a threshold number are associated with spring and autumn.

  In the present embodiment, the threshold value setting unit stores the internal time data 613 when the time information (GPS time) is successfully acquired by the reception process or when a preset threshold setting timing such as once every two days is reached. The month is determined based on the time information. Here, in this embodiment, the month is an example of time information of the present invention.

Then, the threshold setting unit sets the threshold level and the threshold number based on the determined month, the range of the month stored in the threshold storage unit 640, the threshold level, and the threshold number.
Specifically, the threshold value setting unit determines a range to which the month determined based on the internal time information belongs among the month ranges stored in the threshold value storage unit 640. Then, the threshold level and the threshold number associated with the determined month range are set to the threshold level and the threshold number.
For example, in the example of FIG. 15, when the month determined based on the internal time information is, for example, August, the threshold setting unit sets the threshold level “3” and the threshold number “ 3 ”is set to the threshold level and the threshold count.
According to such a threshold setting process, the threshold level and the threshold count can be set to values corresponding to the current month.

[Effects of Second Embodiment]
The energy of sunlight changes according to the season. For example, the energy of sunlight in summer is greater than the energy of sunlight in winter. For this reason, an appropriate threshold level and threshold number change according to a season.
According to the present embodiment, the threshold level and the threshold count can be set to values corresponding to the current month, so that the threshold level and the threshold count can be set to appropriate values.
Further, according to this, the threshold level and the threshold number are increased only when reception fails, and the threshold level and threshold number are decreased only when reception processing is not executed for a predetermined period. Compared to changing the number of times, it is possible to reduce the possibility of reception failure before the threshold level and threshold number are set to appropriate values, and the threshold level and threshold number are set to appropriate values. Can be shortened.

The relationship between the magnitude of solar energy and the season is opposite in the northern and southern hemispheres. For this reason, when the threshold value data of the threshold value storage unit 640 is set assuming the northern hemisphere, for example, when the electronic clock is used in the southern hemisphere, the threshold level and the threshold number are not set to appropriate values. There is a case.
Even in such a case, according to the present embodiment, as in the first embodiment, the threshold level and the number of thresholds increase when reception fails, and the threshold level and threshold are increased when reception processing is not executed for a predetermined period. Since the number of times becomes small, the value can be changed according to the use environment, so that the success rate of reception can be improved and the reception process can be prevented from not being performed for a long time.
In addition, according to this embodiment, the same effect as 1st Embodiment can be acquired by the structure similar to 1st Embodiment.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.
The threshold level and the number of thresholds are set according to the latitude in the electronic timepiece 1 of the first embodiment, and set according to the month in the electronic timepiece of the second embodiment, but in the electronic timepiece of the present embodiment, Set according to latitude and month. Since other configurations are the same as those of the first embodiment and the second embodiment, detailed description thereof is omitted or simplified.

In the electronic timepiece of the present embodiment, as shown in FIG. 16, the threshold data of the threshold storage unit 640 stores a range of months for each latitude, a threshold level, and a threshold number in association with each other.
In the example of FIG. 16, 26 °, 50 °, 70 ° −26 °, −50 °, and −70 ° are stored as the latitude, and further, the range of the month is 3 to May and 9 to 9 for each latitude. Three ranges, November (spring and autumn), June to August (summer), and December to February (winter), are stored.
As shown in FIG. 16, in the northern hemisphere, the corresponding threshold level is higher in summer than in winter and the corresponding threshold number is higher, but in the southern hemisphere, the corresponding threshold level is higher in winter than in summer. Becomes higher and the corresponding threshold number increases.

In the present embodiment, the threshold value setting unit reads the position information from the position information storage unit 630 when the position information in the position information storage unit 630 is updated or when a preset threshold setting timing such as once every two days is reached. Read out the latitude. Further, the threshold setting unit determines the month of the year / month / day based on the internal time information of the internal time data 613. The threshold setting unit sets the threshold level and the threshold number based on the relationship between the read latitude and the determined month, the range of the month for each latitude stored in the threshold storage unit 640, the threshold level, and the threshold number. To do.
Specifically, the threshold setting unit includes the internal time in the range of the month closest to the latitude read from the position information storage unit 630 out of the range of the month for each latitude stored in the threshold storage unit 640. The range to which the month determined based on the information belongs is determined. Then, the threshold level and the threshold number associated with the determined month range are set to the threshold level and the threshold number.
For example, in the example of FIG. 16, when the latitude that has been read is 35 °, for example, and the month determined based on the internal time information is August, the threshold setting unit has a latitude of 26 ° that is the closest latitude to 35 °. The threshold level “5” and the threshold number “5” associated with June to August are set as the threshold level and the threshold number.
According to such a threshold setting process, the threshold level and the threshold number can be set to values corresponding to the latitude of the current location and the current month.

[Effects of Third Embodiment]
The energy of sunlight changes according to the latitude and season. For example, in the low-latitude area, the fluctuation of the solar energy according to the season is small, but in the high-latitude area, the fluctuation of the solar energy according to the season is large. For this reason, it is preferable that the threshold level and the threshold frequency are set in consideration of not only the latitude but also the season. Thus, the appropriate threshold level and threshold number vary with latitude and season.
According to the present embodiment, the threshold level and the threshold count can be set to values corresponding to the latitude of the current location and the current month, and therefore the threshold level and the threshold count can be set to appropriate values.
Further, according to this, the threshold level and the threshold number are increased only when reception fails, and the threshold level and threshold number are decreased only when reception processing is not executed for a predetermined period. Compared to changing the number of times, it is possible to reduce the possibility of reception failure before the threshold level and threshold number are set to appropriate values, and the threshold level and threshold number are set to appropriate values. Can be shortened.
In addition, according to this embodiment, the same effect as 1st Embodiment and 2nd Embodiment can be acquired by the structure similar to 1st Embodiment and 2nd Embodiment.

[Other Embodiments]
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.

  In the first and third embodiments, the threshold level and the threshold number are set according to the latitude of the current location, but the present invention is not limited to this. For example, the threshold level and the number of thresholds may be set according to position information such as altitude where the energy of sunlight changes according to the value.

  In the second and third embodiments, the threshold level and the number of thresholds are set according to the month, but the present invention is not limited to this. For example, the threshold level and the number of times of threshold may be set according to time information such as the time of morning and evening when the energy of sunlight changes according to the value.

  In each of the embodiments described above, in the automatic reception process, when reception fails, the threshold level is changed to a value higher by one level, and when the reception process is not executed for a predetermined period, the threshold level is changed to a value lower by one level. However, the present invention is not limited to this. For example, if reception fails, the threshold count may be changed to a value that is increased by one, and if the reception process is not executed for a predetermined period, the threshold count may be changed to a value that is decreased by one. Further, when the state where the detection level does not become equal to or higher than the threshold level continues for a predetermined period, the threshold level and the threshold count may be changed to a value smaller by one step. In the automatic reception process, the threshold level and the threshold number need not be changed.

  In each of the above embodiments, the threshold level and the threshold number are set according to the latitude and the month, but the present invention is not limited to this. That is, it is sufficient that at least one of the threshold level and the threshold number is set according to the latitude and the moon. However, the reception condition can be set more appropriately if both the threshold level and the threshold number are set according to the latitude and the month.

  In each of the above embodiments, in the automatic reception process, the reception process is executed when it is determined that the detection level is continuously greater than or equal to the threshold number of times, but the present invention is not limited to this. For example, the reception process may be performed when it is determined that the detection level is equal to or higher than the threshold level. In this case, only the threshold level may be set according to the latitude and the month.

In the first and third embodiments, the threshold setting unit sets the threshold level and the threshold number based on the latitude stored in the position information storage unit 630, but the present invention is not limited to this. For example, the threshold setting unit may directly acquire the latitude of the position information output from the GPS receiving circuit 45 and set the threshold level and the threshold number based on the latitude.
In the first and third embodiments, the threshold setting unit selects the latitude closest to the latitude read from the position information storage unit 630 among the latitudes stored in the threshold storage unit 640, and selects the selected latitude. Although the threshold level and the threshold number associated with are set to the threshold level and the threshold number, the present invention is not limited to this.
For example, the threshold setting unit may select a latitude that is lower than the latitude read from the position information storage unit 630 and closest to the read latitude among the latitudes stored in the threshold storage unit 640. . For example, when the read latitude is 40 °, 26 ° may be selected. When the read latitude is lower than 26 ° and −26 °, 26 ° and −26 ° are selected. According to this, compared with the case where the latitude that is closest to the read latitude is selected, the reception conditions can be made stricter, so that the probability of reception failure can be reduced.
On the other hand, the threshold setting unit selects a latitude that is higher than the latitude read from the position information storage unit 630 out of the latitudes stored in the threshold storage unit 640 and is closest to the read latitude. May be. For example, when the read latitude is 30 °, 50 ° may be selected. When the read latitude is higher than 70 ° and −70 °, 70 ° and −70 ° are selected. According to this, since the reception condition can be relaxed compared with the case of selecting the latitude closest to the read latitude, the frequency of the reception process can be increased.

  In each said embodiment, although the illumination intensity detection part is comprised by the solar cell 135, the charge condition detection circuit 43, and the voltage detection circuit 44, this invention is not limited to this. In other words, any configuration that includes a light receiving unit and outputs a value that changes according to the illuminance of light that strikes the light receiving unit (a value that correlates with illuminance) may be used.

  In each of the above embodiments, reception is performed in the timekeeping mode during automatic reception processing, and reception in the positioning mode is performed only during manual reception processing, but naturally, reception in the positioning mode may be performed by automatic reception processing. Good. For example, the user can select the reception mode at the time of automatic reception processing in advance, and when the positioning mode is selected, reception is performed in the positioning mode at the time of automatic reception processing, and automatically when the timing mode is selected. What is necessary is just to receive in timekeeping mode at the time of a reception process.

  The electronic device of the present invention is not limited to a wristwatch (electronic timepiece), and is widely used in devices that receive satellite signals transmitted from a position information satellite, such as a mobile phone and a portable GPS receiver used for mountain climbing. Available.

  In each of the above embodiments, the GPS satellite 100 has been described as an example of the position information satellite, but the present invention is not limited to this. For example, as the position information satellite, a satellite used in other global public navigation satellite systems (GNSS) such as Galileo (EU), GLONASS (Russia), and Beidou (China) can be applied. Further, a geostationary satellite such as a geostationary satellite type satellite navigation augmentation system (SBAS) or a satellite such as a regional satellite positioning system (RNSS) that can search only in a specific region such as a quasi-zenith satellite can be applied.

  DESCRIPTION OF SYMBOLS 1 ... Electronic timepiece (electronic device), 100 ... GPS satellite (position information satellite), 130 ... Secondary battery, 135 ... Solar cell, 2 ... A button, 3 ... B button, 4 ... Crown, 41 ... Diode, 42 ... Charge control switch, 421... Switching element, 43... Charge state detection circuit, 44... Voltage detection circuit, 45... GPS reception circuit (reception unit), 46. Automatic reception control unit (reception control unit) 52 ... Manual reception control unit 53 ... Time zone setting unit 54 ... Time correction unit 55 ... Threshold setting unit 56 ... Position information setting unit 610 ... Time data storage unit 630 ... Position information storage unit, 640 ... Threshold storage unit.

Claims (13)

A receiver for receiving satellite signals from the position information satellite;
An illuminance detector that detects a value related to the illuminance of the irradiated light;
A threshold setting unit for setting the value of the illuminance threshold based on the position information of the current location;
Based on the value detected by the illuminance detection unit, it is determined whether or not the illuminance is equal to or greater than the illuminance threshold value. When the illuminance is equal to or greater than the illuminance threshold value, reception is performed by operating the reception unit. An electronic device comprising: a control unit. A receiver for receiving satellite signals from the position information satellite;
An illuminance detector that detects a value related to the illuminance of the irradiated light;
A threshold setting unit for setting a value of the illuminance threshold based on time information indicating the current time;
Based on the value detected by the illuminance detection unit, it is determined whether or not the illuminance is equal to or greater than the illuminance threshold value. When the illuminance is equal to or greater than the illuminance threshold value, reception is performed by operating the reception unit. An electronic device comprising: a control unit. A receiver for receiving satellite signals from the position information satellite;
An illuminance detector that detects a value related to the illuminance of the irradiated light;
A threshold setting unit for setting a time threshold value based on the location information of the current location;
Based on the value detected by the illuminance detection unit, it is determined whether the duration of the high illuminance state where the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold, and the duration of the high illuminance state is the time. An electronic device comprising: a reception control unit that activates the reception unit to execute reception processing when the threshold is equal to or greater than a threshold value. A receiver for receiving satellite signals from the position information satellite;
An illuminance detector that detects a value related to the illuminance of the irradiated light;
A threshold setting unit that sets a value of a time threshold based on time information indicating the current time;
Based on the value detected by the illuminance detection unit, it is determined whether the duration of the high illuminance state where the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold, and the duration of the high illuminance state is the time. An electronic device comprising: a reception control unit that activates the reception unit to execute reception processing when the threshold is equal to or greater than a threshold value. A receiver for receiving satellite signals from the position information satellite;
An illuminance detector that detects a value related to the illuminance of the irradiated light;
A threshold setting unit for setting values of an illuminance threshold and a time threshold based on time information indicating the current time and position information of the current location;
Based on the value detected by the illuminance detection unit, it is determined whether the duration of the high illuminance state where the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold, and the duration of the high illuminance state is An electronic device comprising: a reception control unit that activates the reception unit to execute reception processing when the time threshold is exceeded. The electronic device according to any one of claims 1, 3, and 5,
The receiving unit acquires and outputs the position information by executing a positioning calculation based on the satellite signal,
The electronic apparatus according to claim 1, wherein the threshold value setting unit sets a threshold value based on the position information output from the receiving unit. The electronic device according to any one of claims 1, 3, and 5,
The receiving unit acquires and outputs the position information by executing a positioning calculation based on the satellite signal,
A location information storage unit that stores the location information output from the reception unit;
The threshold value setting unit sets a threshold value based on the updated position information when the position information stored in the position information storage unit is updated. The electronic device according to claim 1, claim 3, or claim 5 to claim 7,
An operation unit in which a selection operation for selecting city information indicating a city is performed;
An electronic device comprising: a location information setting unit that selects the city information in accordance with the selection operation of the operation unit and sets the location information based on the selected city information. An electronic device control method comprising:
Detecting a value related to the illuminance of the irradiated light;
Setting an illuminance threshold value based on the location information of the current location;
Based on the value detected in the detecting step, it is determined whether or not the illuminance is equal to or greater than the illuminance threshold value, and when the illuminance is equal to or greater than the illuminance threshold value, a reception process of receiving a satellite signal from a position information satellite is executed. And a step for controlling the electronic device. An electronic device control method comprising:
Detecting a value related to the illuminance of the irradiated light;
Setting an illuminance threshold value based on time information indicating the current time;
Based on the value detected in the detecting step, it is determined whether or not the illuminance is equal to or greater than the illuminance threshold value, and when the illuminance is equal to or greater than the illuminance threshold value, a reception process of receiving a satellite signal from a position information satellite is executed. And a step for controlling the electronic device. An electronic device control method comprising:
Detecting a value related to the illuminance of the irradiated light;
Setting a time threshold value based on location information of the current location;
Based on the value detected in the detecting step, it is determined whether or not the duration of the high illuminance state in which the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold, and the duration of the high illuminance state is the time. And a step of executing a reception process of receiving a satellite signal from the position information satellite when the threshold value is equal to or greater than the threshold value. An electronic device control method comprising:
Detecting a value related to the illuminance of the irradiated light;
Setting a time threshold value based on the current time;
Based on the value detected in the detecting step, it is determined whether or not the duration of the high illuminance state in which the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold, and the duration of the high illuminance state is the time. And a step of executing a reception process of receiving a satellite signal from the position information satellite when the threshold value is equal to or greater than the threshold value. An electronic device control method comprising:
Detecting a value related to the illuminance of the irradiated light;
Setting the illuminance threshold value and the time threshold value based on time information indicating the current time and position information of the current location;
Based on the value detected by the detecting step, it is determined whether the duration of the high illuminance state where the illuminance is equal to or greater than the illuminance threshold is equal to or greater than the time threshold, and the duration of the high illuminance state is And a step of performing a reception process of receiving a satellite signal from the position information satellite when the time threshold is not less than the time threshold value.

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