U.S. patent application number 16/826724 was filed with the patent office on 2020-07-16 for portable electronic apparatus.
This patent application is currently assigned to SEIKO EPSON CORPORATION. The applicant listed for this patent is SEIKO EPSON CORPORATION. Invention is credited to Hironori HASEI, Noriaki HIRAIDE, Takuya HIRAIDE.
Application Number | 20200221999 16/826724 |
Document ID | / |
Family ID | 65014548 |
Filed Date | 2020-07-16 |
United States Patent
Application |
20200221999 |
Kind Code |
A1 |
HIRAIDE; Takuya ; et
al. |
July 16, 2020 |
PORTABLE ELECTRONIC APPARATUS
Abstract
A wrist apparatus includes a case, a solar battery that is
provided in the case, and an optical sensor unit as a biological
information measurement unit that is provided in the case, measures
biological information, and is disposed at a position overlapping
the solar battery in a plan view of a light reception surface of
the solar battery.
Inventors: |
HIRAIDE; Takuya; (Okaya-shi,
JP) ; HASEI; Hironori; (Azumino-shi, JP) ;
HIRAIDE; Noriaki; (Shiojiri-shi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SEIKO EPSON CORPORATION |
Tokyo |
|
JP |
|
|
Assignee: |
SEIKO EPSON CORPORATION
Tokyo
JP
|
Family ID: |
65014548 |
Appl. No.: |
16/826724 |
Filed: |
March 23, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
16029099 |
Jul 6, 2018 |
10631784 |
|
|
16826724 |
|
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H02S 20/30 20141201;
G04R 20/02 20130101; G04G 19/00 20130101; G16H 40/67 20180101; G04G
21/025 20130101; A61B 5/02438 20130101; A61B 5/0205 20130101; A61B
5/0022 20130101; A61B 5/02427 20130101; H02S 40/38 20141201; A61B
5/742 20130101; G04G 9/007 20130101; A61B 5/681 20130101; A61B
2560/0214 20130101; H02S 10/40 20141201; A61B 5/1126 20130101; A61B
5/1112 20130101; G04C 10/02 20130101 |
International
Class: |
A61B 5/00 20060101
A61B005/00; A61B 5/024 20060101 A61B005/024; A61B 5/11 20060101
A61B005/11; H02S 10/40 20060101 H02S010/40; G04G 21/02 20060101
G04G021/02; H02S 40/38 20060101 H02S040/38; A61B 5/0205 20060101
A61B005/0205; H02S 20/30 20060101 H02S020/30; G04R 20/02 20060101
G04R020/02; G04C 10/02 20060101 G04C010/02 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 19, 2017 |
JP |
2017-139731 |
Claims
1. A portable electronic apparatus comprising: a case having an
opening; a plate covering the opening; a display panel disposed in
the case; a solar battery disposed between the plate and the
display panel in the case and around the display panel in a plan
view; a biological information measurement unit that is disposed in
the case on an opposite side of the display panel from the solar
battery, measures biological information, and is disposed at a
position overlapping the solar battery in the plan view; and a
circuit board that is provided in the case, and is electrically
connected with the display panel, the solar battery, and the
biological information measurement unit, wherein a distance between
the circuit board and the solar battery is shorter than a distance
between the circuit board and the biological information
measurement unit in a sectional view from a direction which is
orthogonal to a normal direction to a light reception surface of
the solar battery.
2. The portable electronic apparatus according to claim 1, further
comprising: a secondary battery disposed between the display panel
and the biological information measurement unit in the case, and
that is electrically connected to the solar battery.
3. The portable electronic apparatus according to claim 1, wherein
the portable electronic apparatus has a region in which the solar
battery, the display panel, and the biological information
measurement unit overlap each other in the plan view.
4. The portable electronic apparatus according to claim 1, wherein
the biological information measurement unit includes a measurement
window portion provided in the case, and the measurement window
portion is disposed at a position overlapping the solar battery in
the plan view.
5. The portable electronic apparatus according to claim 1, wherein
the circuit board has a first surface and a second surface which is
different from the first surface, and the solar battery is
connected to the first surface, and the biological information
measurement unit is connected to the second surface.
6. The portable electronic apparatus according to claim 5, further
comprising: an illumination unit that illuminates the display
panel, wherein the illumination unit is connected to the first
surface of the circuit board.
7. The portable electronic apparatus according to claim 1, wherein
the biological information measurement unit includes a light
emitting portion, a light receiving portion, and a sensor substrate
that supports light emitting portion and the light receiving
portion, and the sensor substrate overlaps with the solar battery.
Description
CROSS-REFERENCES TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. application Ser.
No. 16/029,099, filed Jul. 6, 2018, the contents of which are
incorporated herein by reference.
[0002] This application claims priority to Japanese Patent
Application No. 2017-139731, filed Jul. 19, 2017, the entirety of
which is herein incorporated by reference.
BACKGROUND
1. Technical Field
[0003] The present invention relates to a portable electronic
apparatus.
2. Related Art
[0004] In the related art, there is a portable electronic apparatus
which is mounted on the wrist of a wearer (user) with a band or the
like, measures biological information such as a pulse wave of the
wearer, and has a clock display function. For example,
JP-A-2006-320735 discloses a wearable life support apparatus which
is mounted on the body of a wearer, and acquires biological
information or body motion information by using a mounted optical
pulse wave sensor or acceleration sensor. In the wearable life
support apparatus, since electric energy for operating various
sensors increases, a method for reducing power consumption is
proposed through power source management, for example, message
display to a user is turned off during sleeping, or a specific
sensor is stopped during sleeping.
[0005] However, in power source management in the wearable life
support apparatus which is an example of a portable electronic
apparatus, in a case where a sensor with high power consumption or
various sensors are mounted, electric energy of a power source may
be insufficient, and thus a user may experience inconvenience such
as not being able to perform measurement or the need for a charging
operation. Meanwhile, in order to secure power supply, measures
such as installing a solar battery capable of obtaining a
sufficient power generation amount (charge amount) are conceivable.
However, there is concern that a sufficient plane area of the solar
battery may not be secured, and a sufficient power generation
amount may not be obtained, depending on a disposition position of
the solar battery.
SUMMARY
[0006] An advantage of some aspects of the invention is to solve at
least a part of the problems described above, and the invention can
be implemented as the following forms or application examples.
Application Example 1
[0007] A portable electronic apparatus according to this
application example includes a case; a solar battery that is
provided in the case; and a biological information measurement unit
that is provided in the case, measures biological information, and
is disposed at a position overlapping the solar battery in a plan
view from a normal direction to a light reception surface of the
solar battery.
[0008] According to the portable electronic apparatus according to
the application example, since the solar battery and the biological
information measurement unit are disposed to overlap each other in
the plan view, a plane area of the solar battery can be increased
such that a power generation amount can be increased, and thus a
charge amount of a power source can be increased. Consequently, it
is possible to reduce concern that electric energy of the power
source may be insufficient.
Application Example 2
[0009] In the portable electronic apparatus according to the
application example, it is preferable that the solar battery is
annular in the plan view, and wherein the centroid of the solar
battery overlaps the biological information measurement unit in the
plan view.
[0010] According to this application example, a balance of the
portable electronic apparatus can be improved, and thus
mountability for a user can be improved.
Application Example 3
[0011] It is preferable that the portable electronic apparatus
according to the application example further includes a display
unit that is provided in the case; and a secondary battery that is
provided in the case, and is electrically connected to the solar
battery, the solar battery overlaps the display unit, and the
display unit is disposed between the solar battery and the
secondary battery.
[0012] According to this application example, a user can easily
visually recognize display on the display unit without being
blocked by the secondary battery.
Application Example 4
[0013] In the portable electronic apparatus according to the
application example, it is preferable that the secondary battery is
disposed between the display unit and the biological information
measurement unit.
[0014] According to this application example, it is possible to
block so-called stray light which is light incident toward the
solar battery for power generation but enters the inside of the
case as leakage light through a gap or the like from the solar
battery side, with the secondary battery, and can thus to reduce
the influence of external light on the biological information
measurement unit.
Application Example 5
[0015] In the portable electronic apparatus according to the
application example, it is preferable that the portable electronic
apparatus has a region in which the solar battery, the display
unit, and the biological information measurement unit overlap each
other in the plan view.
[0016] According to this application example, it is possible to
increase a plane area of the solar battery and thus to increase a
power generation amount.
Application Example 6
[0017] In the portable electronic apparatus according to the
application example, it is preferable that the biological
information measurement unit includes a measurement window portion
provided in the case, and the measurement window portion is
disposed at a position overlapping the solar battery in the plan
view.
[0018] According to this application example, it is possible to
increase a plane area of the solar battery and thus to increase a
power generation amount.
Application Example 7
[0019] It is preferable that the portable electronic apparatus
according to the application example further includes a circuit
board that is provided in the case, and a distance between the
circuit board and the solar battery is shorter than a distance
between the circuit board and the biological information
measurement unit in a sectional view from a direction which is
orthogonal to a normal direction to the light reception
surface.
[0020] According to this application example, since the distance
between the circuit board and the solar battery is short, a
transmission loss of power generated by the solar battery can be
reduced, and thus it is possible to increase charging
efficiency.
Application Example 8
[0021] It is preferable that the portable electronic apparatus
according to the application example further includes a circuit
board that is provided in the case, and a distance between the
circuit board and the solar battery is longer than a distance
between the circuit board and the biological information
measurement unit in a sectional view from a direction which is
orthogonal to a normal direction to the light reception
surface.
[0022] Since the distance between the circuit board and the solar
battery is made long, the solar battery is hardly influenced by
heat generation from the circuit board or other constituent
elements. Consequently, it is possible to suppress a temperature
increase in the solar battery and thus to increase power generation
efficiency in the solar battery.
Application Example 9
[0023] In the portable electronic apparatus according to the
application example, it is preferable that the circuit board has a
first surface and a second surface which is different from the
first surface, and the solar battery is connected to the first
surface, and the biological information measurement unit is
connected to the second surface.
[0024] According to this application example, routing of a wiring
for connection can be made the minimum, and it is also possible to
block so-called stray light which is light incident toward the
solar battery for power generation but enters the inside of the
case as leakage light through a gap or the like from the solar
battery side, with the circuit board, and can thus to reduce the
influence of external light on the biological information
measurement unit.
Application Example 10
[0025] It is preferable that the portable electronic apparatus
according to the application example further includes an
illumination unit that illuminates the display unit, the
illumination unit is connected to the first surface of the circuit
board, and the biological information measurement unit is connected
to the second surface of the circuit board.
[0026] According to this application example, routing of a wiring
for connection can be made the minimum, and it is also possible to
block light emitted from the illumination unit with the circuit
board, and can thus to reduce the influence of stray light on the
biological information measurement unit.
Application Example 11
[0027] In the portable electronic apparatus according to the
application example, it is preferable that the biological
information measurement unit includes a light emitting portion and
a light receiving portion, and the light emitting portion is
disposed outside the light receiving portion in the plan view.
[0028] According to this application example, since the light
receiving portion is located inside the light emitting portion, it
is possible to suppress external light from entering the light
receiving portion and thus to reduce the influence of the external
light on the biological information measurement unit.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The invention will be described with reference to the
accompanying drawings, wherein like numbers reference like
elements.
[0030] FIG. 1 is a schematic configuration diagram illustrating a
summary of a workout support system to which a wrist apparatus as a
portable electronic apparatus is applied.
[0031] FIG. 2 is an exterior perspective view from a front side
(display surface side) illustrating a schematic configuration of
the wrist apparatus.
[0032] FIG. 3 is an exterior perspective view from a rear side
illustrating a schematic configuration of the wrist apparatus.
[0033] FIG. 4 is a sectional view illustrating a configuration of
the wrist apparatus.
[0034] FIG. 5 is a plan view illustrating a configuration of the
wrist apparatus.
[0035] FIG. 6 is a functional block diagram illustrating a
schematic configuration of the wrist apparatus.
[0036] FIG. 7 is a partial sectional view illustrating a
disposition example 1 of constituent elements of the wrist
apparatus.
[0037] FIG. 8 is a partial sectional view illustrating a
disposition example 2 of constituent elements of the wrist
apparatus.
[0038] FIG. 9 is a plan view illustrating Modification Example 1 of
disposition of a solar battery and an optical sensor.
[0039] FIG. 10 is a plan view illustrating Modification Example 2
of disposition of a solar battery and an optical sensor.
[0040] FIG. 11 is a plan view illustrating Modification Example 3
of disposition of a solar battery and an optical sensor.
DESCRIPTION OF EXEMPLARY EMBODIMENTS
[0041] Hereinafter, embodiments of a system related to the
invention will be described. The embodiments described below are
not intended to improperly limit the content of the invention
disclosed in the appended claims. All constituent elements
described in each embodiment are not essential constituent elements
of the invention.
1. Method of Present Embodiment
[0042] First, a description will be made of a workout support
system as an example of a system to which a portable electronic
apparatus according to the present embodiment of the invention is
applied. Hereinafter, as an example of a portable electronic
apparatus, a description will be made of a wrist apparatus
(wearable apparatus) which is mounted on the wrist of a user and
includes a pulse wave sensor or a body motion sensor.
[0043] A wrist apparatus as a portable electronic apparatus used
for a workout support system is provided with a solar battery on a
display unit side, and includes a pulse wave sensor acquiring pulse
wave information as biological information of a user or a body
motion sensor acquiring action information of the user. The wrist
apparatus includes a global positioning system (GPS) acquiring
position information of the user as an example of a positioning
system using a position information satellite called a global
navigation satellite system (GNSS). A portable electronic apparatus
is not limited to the wrist apparatus, and may be a wearable
apparatus which is mounted on other parts of the user, such as the
neck or the ankle.
[0044] The pulse wave sensor as an example of a biological
information measurement unit acquires pulse wave information such
as a pulse rate. As the pulse wave sensor, for example, a
photoelectric sensor (optical sensor) is used. In this case, the
photoelectric sensor may detect reflected light or transmitted
light of light applied to a living body. Since an amount of applied
light absorbed or reflected in the living body differs depending on
a blood flow rate in a blood vessel, sensor information detected by
the photoelectric sensor is converted into a signal corresponding
to the blood flow rate, and information regarding pulsation can be
acquired by analyzing the signal. However, a pulse wave sensor is
not limited to a photoelectric sensor, and may employ other sensors
such as an electrocardiograph or an ultrasonic sensor.
[0045] The photoelectric sensor (optical sensor) is required to
receive necessary light and to block unnecessary light. For
example, in a case of a pulse wave sensor, reflected light
including a pulse wave component reflected at a subject
(particularly, a part including a measurement target blood vessel)
which is a measurement target object is required to be received,
and other light is a noise component and is thus required to be
blocked.
[0046] The body motion sensor is a sensor detecting motion of the
user. As the body motion sensor, an acceleration sensor, an angular
velocity sensor, an azimuth sensor (geomagnetic sensor), a pressure
sensor (altitude sensor), or the like may be used, but other
sensors may be used.
[0047] The GPS stands for a global positioning system, and is a
satellite positioning system for measuring the current position on
the earth on the basis of a plurality of satellite signals. The GPS
has a function of acquiring position information of a user by
performing positioning calculation by using GPS time information
and orbit information, and a time correction function in a clock
function.
2. Workout Support System
[0048] Next, with reference to FIG. 1, a description will be made
of a configuration of a workout support system to which a wrist
apparatus as a portable electronic apparatus is applied. FIG. 1 is
a schematic configuration diagram illustrating a summary of a
workout support system to which a wrist apparatus as a portable
electronic apparatus is applied.
[0049] A workout support system 100 according to the present
embodiment includes, as illustrated in FIG. 1, a wrist apparatus
200 as a portable electronic apparatus which is a detection
apparatus including a pulse wave sensor as a biological sensor
(photoelectric sensor) or a GPS; a portable apparatus 300 as a
workout support apparatus; and a server 400 as an information
processing apparatus which is connected to the portable apparatus
300 via a network NE.
[0050] The GPS as a global navigation satellite system provided in
the wrist apparatus 200 has a function of receiving electric waves
(satellite signals) from GPS satellites 8, and correcting internal
time or acquiring position information by positioning calculation.
Each of the GPS satellites 8 is an example of a position
information satellite which orbits on a predetermined orbit in the
sky above the earth and transmits high-frequency electric waves
superimposed with a navigation message to the ground. In the
following description, an electric wave superimposed with a
navigation message will be referred to as a satellite signal.
[0051] A satellite signal from the GPS satellite 8 includes GPS
time information which is considerably accurate, and a time
correction parameter for correcting a time error. The wrist
apparatus 200 may receive a satellite signal (electric wave) from a
single GPS satellite 8 so as to acquire time information by using
the GPS time information and the time correction parameter included
therein.
[0052] The satellite signal also includes orbit information
indicating a position on an orbit of the GPS satellite 8. The wrist
apparatus 200 may perform positioning calculation by using the GPS
time information and the orbit information. The positioning
calculation is performed on the premise that some extent of an
error is included in an internal time of the wrist apparatus 200.
In other words, a time error is also an unknown number in addition
to x, y and z parameters for specifying a three-dimensional
position of the wrist apparatus 200. Thus, the wrist apparatus 200
may receive satellite signals (electric waves) transmitted from,
for example, three or more GPS satellites 8, and may perform
positioning calculation by using GPS time information and orbit
information included therein so as to acquire position information
of the current location.
[0053] The portable apparatus 300 as a workout support apparatus
may be formed of, for example, a smart phone or a tablet terminal
apparatus. The portable apparatus 300 is connected to the wrist
apparatus 200 in which a pulse wave sensor as a biological sensor
which is a photoelectric sensor via short-range radio communication
such as Bluetooth (registered trademark) communication or wired
communication (not illustrated). The portable apparatus 300
receives measurement information from the wrist apparatus 200, and
notifies a user of processed pulse wave information or body motion
information of the user, or position information. However, the
portable apparatus 300 may be variously modified, for example, by
including an optical sensor unit 40, a body motion sensor unit 170,
or a GPS reception unit 160 which will be described later included
in the wrist apparatus 200.
[0054] The wrist apparatus 200 and the portable apparatus 300 have
a Bluetooth function, and the portable apparatus 300 and the wrist
apparatus 200 are connected to each other via Bluetooth
communication, for example, Bluetooth Low Energy (also called
Bluetooth 4.0). Bluetooth Low Energy focuses on power saving, and
can considerably save power compared with an old version so as to
increase available time of the wrist apparatus.
[0055] The portable apparatus 300 may be connected to the server
400 such as a personal computer (PC) or a server system via the
network NE. The network NE here may employ various networks NE such
as a wide area network (WAN), a local area network (LAN), a mobile
phone communication network, and short-range radio communication.
In this case, the server 400 is realized as a processing storage
unit which receives pulse wave information or body motion
information measured by the wrist apparatus 200 or data processed
by the portable apparatus 300 from the portable apparatus 300 via
the network NE, and stores the information or the data.
[0056] In the embodiment, the wrist apparatus 200 is not required
to be directly connected to the network NE as long as the wrist
apparatus 200 can perform communication with the portable apparatus
300. Therefore, a configuration of the wrist apparatus 200 can be
simplified. However, in the workout support system 100, a
modification may occur in which the portable apparatus 300 is
omitted, and the wrist apparatus 200 is directly connected to the
server 400. In this case, the wrist apparatus 200 has a function,
which is a function of the portable apparatus 300, of processing
measurement information, and a function of transmitting measurement
information to the server 400 or receiving information from the
server 400.
[0057] The workout support system 100 is not limited to a
configuration including the server 400. For example, processes or
functions performed in the workout support system 100 may be
realized by the portable apparatus 300. For example, the portable
apparatus 300 such as a smart phone has restrictions in processing
capability, a storage region, and a battery capacity compared with
a server system, but may secure sufficient processing capability
and the like in consideration of the recent capability improvement.
Therefore, if the needs for the processing capability and the like
are satisfied, the portable apparatus 300 can independently realize
processes or functions performed in the workout support system 100
according to the present embodiment.
[0058] The workout support system 100 according to the present
embodiment is not limited to being realized by three apparatuses.
For example, the workout support system 100 may include two or more
apparatuses among the wrist apparatus 200, the portable apparatus
300, and the server 400. In this case, processes performed in the
workout support system 100 may be performed by any one of
apparatuses, and may be distributed to and performed by a plurality
of apparatuses. The workout support system 100 according to the
present embodiment may include apparatuses which are different from
the wrist apparatus 200, the portable apparatus 300, and the server
400. However, in a case of taking into consideration improvement of
terminal capability or a use form, there may be an embodiment in
which the workout support system 100 according to the present
embodiment is realized by the wrist apparatus 200.
[0059] The workout support system 100 of the present embodiment
includes a memory storing information (for example, programs or
pieces of data), and a processor which operates on the basis of the
information stored in the memory. In the processor, for example, a
function of each unit may be realized by individual hardware, and
may be realized by integrated hardware. The processor may be, for
example, a central processing unit (CPU). However, the processor is
not limited to a CPU, and may employ various processors such as a
graphics processing unit (GPU) or a digital signal processor (DSP).
The processor may be a hardware circuit using an ASIC. The memory
may be, for example, a semiconductor memory such as a static random
access memory (SRAM) or a dynamic random access memory (DRAM), may
be a register, may be a magnetic storage device such as a hard disk
device, and may be an optical storage device such as an optical
disc device. For example, the memory stores computer readable
commands, and the commands are executed by the processor such that
a function of each unit of the workout support system 100 is
realized. The commands here may be commands forming a program, and
may be commands for instructing a hardware circuit to perform an
operation.
3. Wrist Apparatus
[0060] Next, with reference to FIGS. 2 to 8, a description will be
made of a configuration of the wrist apparatus as a portable
electronic apparatus. FIG. 2 is an exterior perspective view from a
front side (display surface side) illustrating a schematic
configuration of the wrist apparatus. FIG. 3 is an exterior
perspective view from a rear side illustrating a schematic
configuration of the wrist apparatus. FIG. 4 is a sectional view
illustrating a configuration of the wrist apparatus. FIG. 5 is a
plan view illustrating a configuration of the wrist apparatus. FIG.
6 is a functional block diagram illustrating a schematic
configuration of the wrist apparatus. FIG. 7 is a partial sectional
view illustrating a disposition example 1 of constituent elements
of the wrist apparatus. FIG. 8 is a partial sectional view
illustrating a disposition example 2 of constituent elements of the
wrist apparatus.
[0061] In the following description of the wrist apparatus 200,
when an apparatus main body 30 is worn by a user, a side located on
a target object side which is a target part for measuring
biological information or the like will be referred to as
.quadrature.a rear side or a rear surface side.quadrature., and a
display surface side of the apparatus main body 30 opposite side
thereto will be referred to as .quadrature.a front side or a front
surface side.quadrature.. A measurement .quadrature.target object
(target part).quadrature. will be referred to as a
.quadrature.subject.quadrature. in some cases. A coordinate system
is set with a case 31 of the wrist apparatus 200 as a reference,
and a direction which becomes distant from the case 31 in a normal
direction to light reception surfaces 80a, 80b, 80c, and 80d of a
panel forming a solar battery 80 is defined as a positive Z axis
direction (+Z axis direction). Two axes orthogonal to the Z axis
are defined as XY axes, and, particularly, a direction in which
band portions 10 are attached to the case 31 is set to the Y axis.
The light reception surfaces 80a, 80b, 80c, and 80d are surfaces
via which light is incident to the solar battery 80.
[0062] FIG. 2 is a perspective view in which the wrist apparatus
200 to which the band portion 10 is fixed is viewed from the +Z
axis direction which is a direction directed toward the front side
(display unit 50 side) from the rear side corresponding to a
subject side in a mounting state. FIG. 3 is a perspective view in
which the wrist apparatus 200 is viewed from the rear side opposite
to FIG. 2, that is, from the .quadrature.Z axis direction. FIG. 4
is a sectional view in which the wrist apparatus 200 is viewed from
the +Y axis direction.
[0063] As illustrated in FIGS. 2 to 4, the wrist apparatus 200 as a
portable electronic apparatus is mounted on a predetermined part
(for example, a measurement target part such as the wrist) of the
user, and measures pulse wave information, position information, or
the like. The wrist apparatus 200 includes the apparatus main body
30 which includes the case 31 and is in close contact with the user
so as to measure pulse wave information or the like, and a pair of
band portions 10 which is attached to the apparatus main body 30
and is used to mount the apparatus main body 30 on the user.
[0064] The apparatus main body 30 including the case 31 is provided
with the display unit 50, the annular solar battery 80 including
the light reception surfaces 80a, 80b, 80c, and 80d of the panel
directed in the +Z axis direction and disposed at an outer edge
part of the display unit 50, and a measurement window portion 45
corresponding to the optical sensor unit 40 (refer to FIG. 4) as a
biological information measurement unit. The display unit 50 and a
part of the solar battery 80 may be disposed to overlap each other
in a plan view from the +Z axis direction (the normal direction to
the light reception surfaces 80a, 80b, 80c, and 80d). A plurality
of operation units (operation buttons) 58 are provided on an outer
surface of the apparatus main body 30, and a bezel 57 is provided
to annularly surround an outer edge of the display unit 50.
However, the wrist apparatus 200 is not limited to such a
configuration, and may be variously modified by omitting some of
the constituent elements or adding other constituent elements
thereto.
[0065] The apparatus main body 30 has the case 31 which is open on
the front side. The measurement window portion 45 of the optical
sensor unit 40 is provided at the top of a protrusion portion 32
protruding from the rear surface which is a rear side surface of
the case 31 on the rear side of the case 31. The optical sensor
unit 40 as a biological information measurement unit is disposed at
a position corresponding to the measurement window portion 45 in a
plan view from the +Z axis direction, and a transparent cover 44 is
inserted into the measurement window portion 45. The transparent
cover 44 may protrude from the top of the protrusion portion 32. At
least apart of the measurement window portion 45 is preferably
disposed at a position overlapping the solar battery 80 in a plan
view from the +Z axis direction. As mentioned above, since at least
a part of the measurement window portion 45 of the optical sensor
unit 40 is disposed at the position overlapping the solar battery
80 annularly provided, a plane area of the solar battery 80, that
is, a light reception area can be increased, and thus it is
possible to increase an amount of generated power.
[0066] The case 31 may be formed by using, for example, metal such
as stainless steel, or a resin. A configuration of the case 31 is
not limited to an integrated configuration, and may be a
configuration of being divided into a plurality of parts, for
example, the case 31 may have a dual structure in which a lid is
provided on the side mounted on a user.
[0067] The apparatus main body 30 is provided with the bezel 57 on
an outer circumferential side of a projection 34 which projects and
stands in the +Z axis direction at the outer edge of the opening of
the case 31 located on the front side of the apparatus main body
30, and is also provided with a windshield plate 55 (a glass plate
in this example) which is a transparent plate as a top plate for
protecting the internal structure inside the bezel 57. The
windshield plate 55 is disposed to close the opening of the case 31
in a plan view from a direction facing the light reception surfaces
80a, 80b, 80c, and 80d of the solar battery 80, that is, from the
+Z axis direction. The windshield plate 55 is attached on an inner
edge side of the projection 34 of the case 31 via a joint member 56
such as a packing or an adhesive. An internal space 36 which is a
closed space is provided inside the case 31 surrounded by the case
31 and the windshield plate 55 closing the opening of the case
31.
[0068] The windshield plate 55 is not limited to a glass plate, and
may be a member which is a light-transmissive member through which
the display unit 50 can be viewed and is made of materials such as
transparent plastic other than glass as long as the materials have
the strength sufficient to protect element components accommodated
in the internal space 36, for example, a liquid crystal display
(LCD 60) forming the display unit 50.
[0069] As illustrated in FIG. 4, as element components forming the
wrist apparatus 200, for example, a circuit board 20, an azimuth
sensor 22 and an acceleration sensor 23 as sensors included in the
body motion sensor unit 170 (refer to FIG. 6), a GPS antenna 28,
the optical sensor unit 40, the liquid crystal display
(hereinafter, referred to as the display panel 60) forming the
display unit 50, an illumination unit 61 of the display panel 60, a
secondary battery 70 (lithium secondary battery), and the solar
battery 80 are stored in the internal space 36 of the case 31.
However, the apparatus main body 30 is not limited to the
configuration illustrated in FIG. 4, and may be added with other
sensors such as a pressure sensor for calculating an elevation or a
temperature sensor for measuring a temperature, or a vibrator. The
circuit board 20 is connected to connection wires with the
above-described element components, a central processing unit (CPU)
21 which is a control circuit controlling the respective sensors
forming the wrist apparatus 200 or the display unit 50 or a control
circuit including a drive circuit, and other circuit elements
24.
[0070] Among the element components forming the wrist apparatus 200
disposed in the internal space 36, the circuit board 20, the
optical sensor unit 40, the secondary battery 70, the display panel
60, and the solar battery 80 are disposed in an order of the solar
battery 80, the display panel 60, the circuit board 20, the
secondary battery 70, and the optical sensor unit 40 from the
windshield plate 55 side. The solar battery 80 is disposed to cover
at least a part of the display unit 50.
[0071] As mentioned above, the display panel 60 forming the display
unit 50 is disposed between the solar battery 80 and the secondary
battery 70 due to the disposition of the element components in the
case 31. With this disposition, the user can easily visually
recognize display on the display unit 50 without being blocked by
the secondary battery 70.
[0072] Since the display panel 60 forming the display unit 50 is
disposed between the solar battery 80 and the optical sensor unit
40 in the case 31, it is possible to block so-called stray light
which is light incident toward the solar battery 80 for power
generation but enters the inside of the case 31 as leakage light
through a gap or the like from the solar battery 80 side, with the
display panel 60, and can thus to reduce the influence of external
light (stray light) on the optical sensor unit 40.
[0073] The secondary battery 70 is disposed between the display
unit 50 and the optical sensor unit 40 due to the disposition of
the element components in the case 31. With this disposition, it is
possible to block so-called stray light which is light incident
toward the solar battery 80 for power generation but enters the
inside of the case 31 as leakage light through a gap or the like
from the solar battery 80 side, with the secondary battery 70, and
can thus to reduce the influence of external light on the optical
sensor unit 40.
[0074] Preferably, there is provided a region in which the solar
battery 80, the display panel 60 forming the display unit 50, and
the optical sensor unit 40 overlap each other in a plan view from
the +Z axis direction. With this overlapping disposition, it is
possible to increase a plane area of the solar battery 80 and thus
to increase a power generation amount.
[0075] As illustrated in FIG. 7, preferably, the circuit board 20,
the optical sensor unit 40, and the solar battery 80 are disposed
such that a distance L2 (the shortest distance between the circuit
board 20 and the solar battery 80) between the circuit board 20 and
the solar battery 80 is longer than a distance L1 (the shortest
distance between the circuit board 20 and the optical sensor unit
40) between the circuit board 20 and the optical sensor unit 40 in
a sectional view from the .quadrature.Y axis direction which is
orthogonal to the +Z axis direction (the normal direction to the
light reception surfaces 80a, 80b, 80c, and 80d). As mentioned
above, if the distance L2 between the circuit board 20 and the
solar battery 80 is made long, the solar battery 80 is hardly
influenced by heat generation from the circuit board 20 or other
constituent elements. In other words, it is possible to suppress a
temperature increase in the solar battery 80 and thus to suppress a
reduction in power generation efficiency in the solar battery
80.
[0076] As illustrated in FIG. 8, the circuit board 20, the optical
sensor unit 40, and the solar battery 80 are disposed such that the
distance L2 (the shortest distance between the circuit board 20 and
the solar battery 80) between the circuit board 20 and the solar
battery 80 may be shorter than the distance L1 (the shortest
distance between the circuit board 20 and the optical sensor unit
40) between the circuit board 20 and the optical sensor unit 40 in
a sectional view from the .quadrature.Y axis direction which is
orthogonal to the +Z axis direction (the normal direction to the
light reception surfaces 80a, 80b, 80c, and 80d). As mentioned
above, if the distance L2 between the circuit board 20 and the
solar battery 80 is made short, a transmission loss of power
generated by the solar battery 80 can be reduced, and thus it is
possible to increase charging efficiency.
[0077] Since the circuit board 20 is disposed between the solar
battery 80 and the optical sensor unit 40 in the case 31, it is
possible to block so-called stray light which is light incident
toward the solar battery 80 for power generation but enters the
inside of the case 31 as leakage light through a gap or the like
from the solar battery 80 side, with the circuit board 20, and can
thus to reduce the influence of external light (stray light) on the
optical sensor unit 40.
[0078] Hereinafter, each element component will be described also
with reference to the functional block diagram of FIG. 6.
[0079] The circuit board 20 has a front surface 20f as a first
surface and a rear surface 20r as a second surface which is
different from the front surface 20f and is an opposite surface to
the front surface 20f, and ends thereof are attached to the inside
of the case 31 via a circuit case 75. The azimuth sensor 22 and the
acceleration sensor 23 as sensors included in the body motion
sensor unit 170, the CPU 21 as a control circuit, and the like are
mounted on the front surface 20f of the circuit board 20, and other
circuit elements 24 and the like are mounted on the rear surface
20r.
[0080] The display panel 60 and the solar battery 80 are connected
to the front surface 20f of the circuit board 20 via a connection
wiring portion 63 and a connection wiring portion 81 formed of
flexible boards or the like. The optical sensor unit 40 is
electrically connected to the rear surface 20r of the circuit board
20 which is an opposite surface to the front surface 20f via a
connection wiring portion 46 formed of a flexible board or the
like. With such disposition, routing of a wiring for connection can
be made the minimum, and it is also possible to block stray light
which is light incident for power generation but enters the inside
of the case as leakage light from the solar battery 80 side, with
the circuit board 20, and can thus to reduce the influence of
external light on the optical sensor unit 40. The circuit case 75
can guide the secondary battery 70 or the like.
[0081] The azimuth sensor (geomagnetic sensor) 22 or the
acceleration sensor 23 included in the body motion sensor unit 170
may measure information related to motion of the user's body, that
is, body motion information. The azimuth sensor (geomagnetic
sensor) 22 or the acceleration sensor 23 outputs a body motion
detection signal which is a signal changing depending on body
motion of the user, and transmits the body motion detection signal
to the CPU 21 as a control circuit.
[0082] The CPU 21 forms a control circuit or the like controlling a
circuit which controls the GPS reception unit 160 including the GPS
antenna 28, a circuit which drives the optical sensor unit 40 so as
to measure a pulse wave, a circuit which drives the display unit 50
(display panel 60), a circuit which drives the body motion sensor
unit 170 so as to measure body motion information, and a power
generation circuit in the solar battery 80. The CPU 21 transmits
pulse wave information or body motion information measured at each
part, or position information of the user to a communication unit
29 as necessary.
[0083] The GPS antenna 28 is included in the GPS reception unit 160
along with a signal processing portion 66, and receives a plurality
of satellite signals. The signal processing portion 66 performs
positioning calculation on the basis of the plurality of satellite
signals received by the GPS antenna 28, and acquires as position
information of the user.
[0084] The communication unit 29 transmits the pulse wave
information or the body motion information, or the position
information of the user transmitted from the CPU 21 to the portable
apparatus 300 or the like as necessary.
[0085] The optical sensor unit 40 as a biological information
measurement unit measures a pulse wave or the like, and includes
the light receiving portion 41, and a plurality of (in the present
embodiment, two) light emitting portions 42 disposed on both sides
of the light receiving portion 41, that is, outside the light
receiving portion 41 (on the outer circumferential side of the case
31) in a plan view. In other words, the light receiving portion 41
is disposed further toward the center of the case 31 than the light
emitting portion 42 in a plan view from the +Z axis direction.
Therefore, in a plan view from the +Z axis direction, a distance
from the outer edge of the case 31 to the optical sensor unit 40
increases, and thus light emitted from the light emitting portions
42, and natural light or illumination light (hereinafter, referred
to as external light) which is different from light emitted from
the light emitting portions 42 and reflected from the user hardly
reach the light receiving portion 41, so that the influence of the
external light on the light receiving portion 41 can be reduced.
The number of light emitting portions 42 is not limited to two, and
may be one or three or more. The light receiving portion 41 and the
two light emitting portions 42 are attached to one surface of a
sensor substrate 43, and is covered with a transparent cover 44
which is formed of a light-transmissive member made of a
thermosetting resin. A portion of the transparent cover 44
including a region corresponding to the light receiving portion 41
and the two light emitting portions 42 is inserted into the
measurement window portion 45 provided in the case 31. The
transparent cover 44 may protrude from the top of the protrusion
portion 32 of the case 31.
[0086] As described above, in the optical sensor unit 40, a subject
(measurement target object) is irradiated with light emitted from
the light emitting portion 42, and the reflected light is received
by the light receiving portion 41, and thus pulse wave information
is measured. The optical sensor unit 40 outputs a signal detected
by the pulse wave sensor including the light emitting portion 42
and the light receiving portion 41, as a pulse wave measurement
signal. For example, a photoelectric sensor is used as the optical
sensor unit 40. In this case, there may be a method in which
reflected light or transmitted light of light applied to a living
body (the wrist of the user) from the light emitting portion 42 is
detected by the light receiving portion 41. In this method, since
an amount of applied light absorbed or reflected in the living body
differs depending on a blood flow rate in a blood vessel, sensor
information detected by the photoelectric sensor is converted into
a signal corresponding to the blood flow rate, and information
regarding pulsation can be acquired by analyzing the signal.
However, a pulse wave sensor is not limited to a photoelectric
sensor, and may employ other sensors such as an electrocardiograph
or an ultrasonic sensor.
[0087] As illustrated in FIG. 5, at least a part of the optical
sensor unit 40 is disposed to overlap the solar battery 80 to
overlap the annularly formed solar battery 80 in a plan view from
the direction (+Z axis direction) facing the light reception
surfaces 80a, 80b, 80c, and 80d of the solar battery 80. Here, the
optical sensor unit 40 includes a region up to the outer edge of
the transparent cover 44 or a region up to the outer edge of the
sensor substrate 43 in a plan view from the +Z axis direction. In
the present embodiment, the sensor substrate 43 overlaps the solar
battery 80 annularly formed. The term overlapping indicates a state
of S>0 if an area where the solar battery 80 and the optical
sensor unit 40 overlap each other in a plan view from the +Z axis
direction is indicated by S.
[0088] As mentioned above, since at least a part of the optical
sensor unit 40 is disposed at a position overlapping the annularly
disposed solar battery 80 in a plan view from the +Z axis
direction, a plane area of the solar battery 80 can be increased
such that a power generation amount can be increased, and thus a
charge amount of the power source can be increased.
[0089] As illustrated in FIG. 5, at least a part of the annularly
formed optical sensor unit 40 is preferably disposed to overlap the
centroid G of the solar battery 80 in a plan view from the +Z axis
direction. With the disposition of the optical sensor unit 40 and
the solar battery 80, biasing of the centroid in the apparatus main
body 30 can be suppressed. In other words, the centroid G of the
solar battery 80 and the optical sensor unit 40 are located at the
center of the apparatus main body 30 in a plan view from the +Z
axis direction. Therefore, since the centroid of the apparatus main
body 30 is located at the center of the apparatus main body 30 in a
plan view from the +Z axis direction, a balance (centroid position)
is favorable, and thus mountability for a user can be improved. The
centroid G may be replaced with the center of mass. In a case of a
solid object, the centroid G may be defined in a structure of the
solid object, or may be defined in a space. The term
.quadrature.overlapping the centroid may be defined as a state of
overlapping the centroid in a case where the position of the
centroid is projected onto a two-dimensional plane or a
predetermined target object when viewed from a predetermined
direction.
[0090] The display unit 50 can be visually recognized by the user
through the windshield plate 55, and is formed of numbers or icons
displayed on a display member such as the display panel 60, or time
display indicators. In other words, in the present embodiment,
various pieces of information such as measured biological
information or information indicating a workout state are displayed
by using the display panel 60, and the display is presented to the
user from the front side (in the +Z axis direction). As the display
member, instead of the display panel 60 which is a liquid crystal
display, an organic electroluminescence (EL) display, an
electrophoretic display (EPD), or a light emitting diode (LED)
display may be used.
[0091] The illumination unit 61 functions as a backlight of the
display panel 60. The illumination unit 61 is connected to the
front surface 20f as a first surface of the circuit board 20. Since
the illumination unit 61 is connected to the circuit board 20 as
described above, routing of a wiring for connection can be made the
minimum, and it is also possible to block light emitted from the
illumination unit 61 with the circuit board 20, and can thus to
reduce the influence of stray light on the optical sensor unit
40.
[0092] The secondary battery 70 has both of polarity terminals
connected to the circuit board 20 via a connection board (not
illustrated), and supplies power to a circuit controlling a power
source. The power is converted into predetermined voltages by the
circuit, so as to be supplied to respective circuits, and thus to
drive a circuit which drives the optical sensor unit 40 to measure
a pulse, a circuit which drives the display panel 60, and a control
circuit (CPU 21) which controls the respective circuits. The
secondary battery 70 is charged via a pair of charging terminals
which are electrically connected to the circuit board 20 via a
conduction member (not illustrated) such as a coil spring, or is
charged by using power generated by the solar battery 80.
[0093] The solar battery (solar cell) 80 generates power by
converting light energy of external light such as sunlight into
power by using a photoelectromotive force effect. The solar battery
80 of the present embodiment is disposed to be divided into four
panels between the windshield plate 55 and the display panel 60,
and the light reception surfaces 80a, 80b, 80c, and 80d of the
respective panels are disposed to be directed in the +Z axis
direction. The solar battery 80 is disposed on the outer edge side
of the display panel 60 (the outer edge of the display unit 50),
and is formed in a so-called annular shape (ring shape) of which
the central portion has a penetration hole. In other words, the
solar battery 80 has an outer circumference along the outer edge of
the case 31 and an inner circumference of which a circumferential
length is shorter than that of the outer circumference. In this
configuration, the annular solar battery 80 using the four panels
is exemplified, but the solar battery 80 may be formed of an
integrated panel. In a case where the solar battery 80 is formed of
a plurality of panels, any number of panels may be used. Any shapes
of panels forming the solar battery 80 may be used.
[0094] A storage unit 180 stores biological information such as a
pulse wave from the optical sensor unit 40, position information
from the GPS reception unit 160, and body motion information from
the body motion sensor unit 170, under the control of the CPU
21.
[0095] According to the wrist apparatus 200 as a portable
electronic apparatus, since at least a part of the optical sensor
unit 40 is disposed at the position overlapping the annularly
disposed solar battery 80 in a plan view from the +Z axis
direction, a plane area of the solar battery 80 can be increased
such that a power generation amount can be increased, and thus a
charge amount of the power source can be increased. Consequently,
it is possible to reduce inconvenience such as not being able to
perform measurement or the need for a charging operation due to
insufficiency of electric energy of the power source (secondary
battery 70). The centroid G of the solar battery 80 and the optical
sensor unit 40 are located at the center of the apparatus main body
30 in a plan view from the +Z axis direction. Therefore, since the
centroid of the apparatus main body 30 is located at the center of
the apparatus main body 30 in a plan view from the +Z axis
direction, a balance (centroid position) is favorable, and thus
mountability for a user can be improved.
3.1 Modification Example of Disposition of Solar Battery and
Optical Sensor
[0096] In the above description, a description has been made of the
configuration in which the annular solar battery 80 is disposed on
the outer edge side of the display panel 60, and the optical sensor
unit 40 is disposed on the central portion side of the solar
battery 80 in a plan view from the +Z axis direction, but a
disposition configuration of the solar battery 80 and the optical
sensor unit 40 is not limited thereto. A disposition and a
configuration (shape) of the solar battery 80 and a disposition of
the optical sensor unit 40 may be realized as described in the
following modification examples, for example. A disposition
configuration of the solar battery 80 and the optical sensor unit
40 is not limited to the modification examples, and may employ
other configurations. Hereinafter, with reference to FIGS. 9 to 11,
Modification Example 1 to Modification Example 3 of disposition of
the solar battery and the optical sensor will be described in this
order. FIGS. 9 to 11 are plan views illustrating modification
examples of disposition of the solar battery and optical sensor, in
which FIG. 9 illustrates Modification Example 1, FIG. 10
illustrates Modification Example 2, and FIG. 11 illustrates
Modification Example 3.
Modification Example 1
[0097] With reference to FIG. 9, a description will be made of
Modification Example 1 of disposition of the solar battery and the
optical sensor. As illustrated in FIG. 9, in the same manner as in
the above-described embodiment, a solar battery 80 according to
Modification Example 1 is located on the outer edge side of the
display panel 60 (refer to FIG. 4) between the windshield plate 55
and the display panel 60, and light reception surfaces 80a, 80b,
80c, and 80d of four respective panels which are disposed to be
separate from each other are disposed to be directed in the +Z axis
direction. The solar battery 80 is formed in an annular shape (ring
shape) of which the central portion has a penetration hole, and the
display unit 50 is provided at the central portion. The solar
battery 80 may be formed of an integrated panel not divided.
[0098] Here, an optical sensor unit 401 includes a sensor substrate
431 connected to light emitting portions 421 and a light receiving
portion 411, a transparent cover 441 covering the above-described
constituent elements, and a measurement window portion 451 into
which a part of the transparent cover 441 is inserted. The optical
sensor unit 401 is disposed at a position where the centroid PG of
the optical sensor unit 401 is deviated in the .quadrature.Y axis
direction in a plan view from the +Z axis direction. Consequently,
at least a part of the optical sensor unit 401, for example, a
substantially half of the optical sensor unit 401 in the
.quadrature.Y axis direction overlaps the solar battery 80 in a
plan view from the +Z axis direction in this configuration.
[0099] According to the disposition of Modification Example 1,
since at least a part of the optical sensor unit 401 is disposed at
the position overlapping the annularly disposed solar battery 80 in
a plan view from the +Z axis direction, a plane area of the solar
battery 80 can be increased such that a power generation amount can
be increased, and thus a charge amount of the power source can be
increased.
Modification Example 2
[0100] With reference to FIG. 10, a description will be made of
Modification Example 2 of disposition of the solar battery and the
optical sensor. As illustrated in FIG. 10, a solar battery 801
according to Modification Example 2 is formed of a semicircular
single panel of which an outer circumferential side forms a
circular arc-shaped outer edge and a center side forms a
substantially linear outer edge along the Y axis between the
windshield plate 55 and the display panel 60 (refer to FIG. 4). The
solar battery 801 is disposed on the +X axis side (three o'clock
side) of the case 31. Therefore, a display unit 501 is disposed on
the .quadrature.X axis side (nine o'clock side) of the case 31. A
light reception surface 80i of the panel forming the solar battery
801 is disposed to be directed in the +Z axis direction.
[0101] Here, the optical sensor unit 40 includes at least the
sensor substrate 43 connected to the light emitting portions 42 and
the light receiving portion 41, and is located at the center of the
case 31 in a plan view from the +Z axis direction. In other words,
the optical sensor unit 40 is disposed to partially overlap the
substantially linear outer edge side of the solar battery 801 along
the Y axis in a plan view from the +Z axis direction. A
configuration of the optical sensor unit 40 is the same as
described above, and thus a description thereof will be omitted
here.
[0102] According to the disposition of Modification Example 2,
since at least apart of the optical sensor unit 40 is disposed at a
position overlapping the solar battery 801 disposed in a
semicircular shape in a plan view from the +Z axis direction, a
plane area of the solar battery 801 can be increased such that a
power generation amount can be increased, and thus a charge amount
of the power source can be increased.
[0103] The +X axis side (three o'clock side) of the case 31 is
often located at the fingertip side of the user when the wrist
apparatus 200 is mounted on the user's wrist, and is thus hardly
hooked by clothes (sleeve) of the user. Therefore, in a case where
the solar battery 801 is disposed on the +X axis side (three
o'clock side) of the case 31 as in Modification Example 2, it is
possible to increase a probability that sunlight may be received
and also to perform more efficient power generation.
Modification Example 3
[0104] With reference to FIG. 11, a description will be made of
Modification Example 3 of disposition of the solar battery and the
optical sensor. As illustrated in FIG. 11, a solar battery 802
according to Modification Example 3 is formed of a semicircular
single panel of which an outer circumferential side forms a
circular arc-shaped outer edge and a center side forms a
substantially linear outer edge along the X axis between the
windshield plate 55 and the display panel 60 (refer to FIG. 4). The
solar battery 802 is disposed on the +Y axis side (twelve o'clock
side) of the case 31. Therefore, a display unit 502 is disposed on
the .quadrature.Y axis side (six o'clock side) of the case 31. A
light reception surface 80n of the panel forming the solar battery
802 is disposed to be directed in the +Z axis direction.
[0105] Here, the optical sensor unit 40 includes at least the
sensor substrate 43 connected to the light emitting portions 42 and
the light receiving portion 41, and is located at the center of the
case 31 in a plan view from the +Z axis direction. In other words,
the optical sensor unit 40 is disposed to partially overlap the
substantially linear outer edge side of the solar battery 802 along
the X axis. A configuration of the optical sensor unit 40 is the
same as described above, and thus a description thereof will be
omitted here.
[0106] According to the disposition of Modification Example 3,
since at least a part of the optical sensor unit 40 is disposed at
a position overlapping the solar battery 802 disposed in a
semicircular shape in a plan view from the +Z axis direction, a
plane area of the solar battery 802 can be increased such that a
power generation amount can be increased, and thus a charge amount
of the power source can be increased.
[0107] In the embodiment, as an example of a positioning system
using a position information satellite, a description has been made
of the GPS using the GPS satellite 8 as a position information
satellite included in a global navigation satellite system (GNSS),
but this is only an example. The global navigation satellite system
may include other systems such as Galileo (EU), GLONASS (Russia),
or BeiDou (China), or a positioning information satellite
transmitting a satellite signal, for example, a stationary
satellite or a quasi-zenith satellite such as SBAS. In other words,
the wrist apparatus 200 may be configured to acquire any one of
date information, time information, position information, and speed
information obtained by processing electric waves (radio signals)
from position information satellites including satellites other
than the GPS satellites 8. Instead of the global navigation
satellite system, a regional navigation satellite system (RNSS) may
be used.
* * * * *