U.S. patent application number 12/556766 was filed with the patent office on 2010-09-30 for wireless device.
This patent application is currently assigned to Kabushiki Kaisha Toshiba. Invention is credited to Koichi SATO, Makoto TABATA.
Application Number | 20100245265 12/556766 |
Document ID | / |
Family ID | 42269345 |
Filed Date | 2010-09-30 |
United States Patent
Application |
20100245265 |
Kind Code |
A1 |
SATO; Koichi ; et
al. |
September 30, 2010 |
WIRELESS DEVICE
Abstract
A wireless device includes: a casing having a first face; a
display configured to be visible from the first face; a touch
sensor formed by a transparent material and mounted in the casing
with respect to the display as a part of the first face; a
substrate mounted to a side opposite to the first face with respect
to the display; and an antenna element including: a first portion
built in the casing, connected to a feeding point included in the
substrate, and located within a first range occupied by the touch
sensor when viewed from a direction perpendicular to the first
face; and a second portion located within a second range other than
the first range.
Inventors: |
SATO; Koichi; (Tokyo,
JP) ; TABATA; Makoto; (Tokyo, JP) |
Correspondence
Address: |
FRISHAUF, HOLTZ, GOODMAN & CHICK, PC
220 Fifth Avenue, 16TH Floor
NEW YORK
NY
10001-7708
US
|
Assignee: |
Kabushiki Kaisha Toshiba
Tokyo
JP
|
Family ID: |
42269345 |
Appl. No.: |
12/556766 |
Filed: |
September 10, 2009 |
Current U.S.
Class: |
345/173 |
Current CPC
Class: |
H01Q 21/28 20130101;
G06F 1/1698 20130101; H01Q 1/243 20130101; G06F 1/1626 20130101;
H01Q 9/30 20130101; H01Q 9/0421 20130101; H01Q 9/42 20130101 |
Class at
Publication: |
345/173 |
International
Class: |
G06F 3/041 20060101
G06F003/041 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 30, 2009 |
JP |
2009-082341 |
Claims
1. A wireless device comprising: a casing having a first face; a
display configured to be visible from the first face; a touch
sensor formed by a transparent material and mounted in the casing
with respect to the display as a part of the first face; a
substrate mounted to a side opposite to the first face with respect
to the display; and an antenna element including: a first portion
built in the casing, connected to a feeding point included in the
substrate, and located within a first range occupied by the touch
sensor when viewed from a direction perpendicular to the first
face; and a second portion located within a second range other than
the first range.
2. The wireless device of claim 1, wherein: current of a relatively
large amplitude is distributed at the first portion when power is
fed, and voltage of a relatively large amplitude is distributed at
the second portion when power is fed.
3. The wireless device of claim 1, wherein the antenna element
includes a portion extending from the feeding point in a direction
away from the first face.
4. The wireless device of claim 1, comprising a conductive member
arranged between the first portion of the antenna element and the
touch sensor.
5. The wireless device of claim 1, wherein the antenna element
includes an open-ended monopole antenna, a folded monopole antenna,
and an inverted-F antenna.
6. The wireless device of claim 1, wherein: the first face has a
shape of a rectangle, and the antenna element is mounted in a
vicinity of one short side of the rectangle.
7. The wireless device of claim 6, further comprising an antenna
element mounted in the vicinity of the one short side of the
rectangle.
8. The wireless device of claim 6, further comprising an antenna
element mounted in a vicinity of the other short side of the
rectangle.
9. A wireless device comprising: a casing having a first face; a
touch panel including a display and a touch sensor, the touch panel
being a part of the first face; a substrate in the casing; and an
antenna element in the casing including: a first portion connected
to a feeding point included in the substrate, and located within a
first range occupied by the touch panel when viewed from a
direction perpendicular to the first face; and a second portion
located within a second range other than the first range.
10. The wireless device of claim 9, wherein: current of a
relatively large amplitude is distributed at the first portion when
power is fed, and voltage of a relatively large amplitude is
distributed at the second portion when power is fed.
11. The wireless device of claim 9, wherein the antenna element
includes a portion extending from the feeding point in a direction
away from the first face.
12. The wireless device of claim 9, comprising a conductive member
arranged between the first portion of the antenna element and the
touch panel.
13. The wireless device of claim 9, wherein the antenna element
includes an open-ended monopole antenna, a folded monopole antenna,
and an inverted-F antenna.
14. The wireless device of claim 9, wherein: the first face has a
shape of a rectangle, and the antenna element is mounted in a
vicinity of one short side of the rectangle.
15. The wireless device of claim 14, further comprising an antenna
element mounted in the vicinity of the one short side of the
rectangle.
16. The wireless device of claim 14, further comprising an antenna
element mounted in a vicinity of the other short side of the
rectangle.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The entire disclosure of Japanese Patent Application No.
2009-082341 filed on Mar. 30, 2009, including specification,
claims, drawings and abstract is incorporated herein by reference
in its entirety.
BACKGROUND
[0002] 1. Field of the Invention
[0003] One aspect of the invention relates to a wireless device, in
particular, to a wireless device including a touch panel configured
by a display device and a touch sensor.
[0004] 2. Description of the Related Art
[0005] A touch panel configured by combining a touch sensor and a
display device such as a liquid crystal panel is used as an
operation input means for various electronic devices, for example,
mobile phones, handheld terminals, copiers, portable game machines,
electronic dictionaries, car navigators, electric appliances,
automatic ticket vending machines, cash dispensers, etc.).
[0006] In such a touch panel, since the operation keys displayed on
a screen of the display device can be set up variously and freely
by the software, greater flexibility of operation input is obtained
compared to a mechanical operation key.
[0007] However, any attempts to use the touch panel in small
wireless devices such as mobile phones will face various
challenges. In order to have multiple and diverse functions like
recent mobile phones and as well as obtaining an easily visible
display, it is necessary to form the screen size of the display
device as large as possible. Furthermore, a circuit substrate or a
battery may be housed in a space formed in the rear of the display
screen. Thus, in order to arrange an antenna, which is an essential
part of the wireless device, within a casing, it is necessary to
utilize the limited space formed on the periphery of the casing and
outside the frame of the display screen.
[0008] The peripheral portion of the casing corresponds to the
periphery of the touch sensor mounted so as to cover the display
screen, and in addition an electric line for signaling information
regarding a detected position is mounted in the vicinity of the
periphery of the casing. Thus, if such line approaches the antenna,
there is concern it will have an unfavorable influence on a
characteristic of the antenna (for example, a decrease of
impedance, electromagnetic interference, etc.).
[0009] As a technique to address such an issue, a technique where
the antenna is built in the display device including a touch panel
is known (See JP-A-2006-48166, 5 and 8 pages, FIGS. 2 and 8). The
touch panel of the display device disclosed in JP-A-2006-48166 has
an operation unit which is a region where touch operation is able
to be performed, and a frame unit formed therearound, and further
includes an antenna unit in a part of the frame unit.
[0010] For the display device disclosed in JP-A-2006-48166, as
shown in FIG. 8 of JP-A-2006-48166, the antenna is mounted in the
frame unit of the touch panel, specifically, a position overlapped
with a support substrate of the touch panel when viewed from a
direction perpendicular to the display screen. Thus, disposing the
entire antenna in a position overlapped with the substrate may
cause unfavorable issues in the light of the characteristic of the
antenna described above.
SUMMARY
[0011] One of objects of the invention is to provide a wireless
device having a touch panel, capable of preventing deterioration in
the characteristic of an antenna.
[0012] According to an aspect of the invention, there is provided a
wireless device including: a casing having a first face; a display
configured to be visible from the first face; a touch sensor formed
by a transparent material and mounted in the casing with respect to
the display as a part of the first face; a substrate mounted to a
side opposite to the first face with respect to the display; and an
antenna element including: a first portion built in the casing,
connected to a feeding point included in the substrate, and located
within a first range occupied by the touch sensor when viewed from
a direction perpendicular to the first face; and a second portion
located within a second range other than the first range.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Embodiment may be described in detail with reference to the
accompanying drawings, in which:
[0014] FIG. 1 is an exemplary perspective view illustrating an
appearance of a wireless device related to a first embodiment of
the invention;
[0015] FIG. 2 is an exemplary front view illustrating a
configuration of the wireless device related to the first
embodiment of the invention;
[0016] FIG. 3 is an exemplary side view illustrating the
configuration of the wireless device related to the first
embodiment of the invention;
[0017] FIG. 4 is an exemplary rear view illustrating the
configuration of the wireless device related to the first
embodiment of the invention;
[0018] FIG. 5 is an exemplary view illustrating the wireless device
of FIG. 3 on an enlarged scale, in which a second feeding point 22,
a second antenna element 32, a third feeding point 23 and a third
antenna element 33 are added;
[0019] FIG. 6 is an exemplary side view illustrating a modification
of the wireless device 1 in which the second substrate 18 shown in
FIG. 5 is extended;
[0020] FIG. 7 is an exemplary front view illustrating a
configuration of a wireless device related to a second embodiment
of the invention;
[0021] FIG. 8 is an exemplary diagram illustrating a state where
the wireless device related to the second embodiment in the same
direction shown in FIG. 7 is grasped by a left hand;
[0022] FIG. 9 is an exemplary diagram illustrating a state where
the wireless device related to the second embodiment is rotated
counterclockwise by 90 degrees from the state shown in FIG. 7 and
grasped by both hands;
[0023] FIG. 10 is an exemplary front view illustrating a
modification of the wireless device related to the second
embodiment of the invention;
[0024] FIG. 11 is an exemplary diagram illustrating a state where
the modification of the wireless device related to the second
embodiment in the same direction shown in FIG. 10 is grasped by a
left hand;
[0025] FIG. 12 is an exemplary diagram illustrating a state where
the modification of the wireless device related to the second
embodiment are rotated counterclockwise by 90 degrees from the
state shown in FIG. 10 and grasped by both hands; and
[0026] FIG. 13 is an exemplary diagram illustrating the
configuration of an antenna element according to the modification
of the wireless device related to the second embodiment.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] Now, exemplary embodiments of the invention will be
described with reference to accompanying drawings.
[0028] In addition, as used herein with reference to each drawing,
unless otherwise noted, terms "top and bottom, left and right, or
horizontal, perpendicular (vertical)" mean that these are "top and
bottom, left and right, or horizontal, perpendicular (vertical)"
with respect to a plane of the paper. Further, the same reference
characters are used to designate the same configuration throughout
the drawings.
First Embodiment
[0029] A first embodiment of the invention will be described herein
below, with reference to FIG. 1 to FIG. 6. FIG. 1 is a perspective
view illustrating an appearance of a wireless device 1 related to
the first embodiment of the invention. The wireless device 1
includes a touch panel 11 at a front (a face facing the user during
use) of the casing 10 having a rectangular shape with a thickness
(the rectangular shape includes a shape similar to a rectangle with
rounded corners, as shown). The touch panel 11 is configured to
overlap, for example, a liquid crystal display device with a touch
sensor made of a transparent material, which will be described
later. The touch panel 11 is used as an operation input unit by
displaying software-controlled operation keys on a screen of the
display device, and used as a display unit capable of displaying
various texts or images.
[0030] FIG. 2 is a front view illustrating main configurations of
the wireless device 1 when viewed from the front (i.e., from a
direction perpendicular to the front of the casing 10). FIG. 3 is a
side view illustrating the main configurations of the wireless
device 1 when viewed from the right side of FIG. 2. In FIG. 3, the
left side and the right side respectively correspond to the front
of the casing 10 and the rear side opposite to the front of the
casing 10. FIG. 4 is a rear view illustrating the main
configurations of the wireless device 1 viewed from the rear side
of the casing 10.
[0031] As shown in FIG. 2, a display 12 including, for example a
liquid crystal device is mounted so as to be visible from the front
of the casing 10. Referring to FIG. 3, a touch sensor 13 is mounted
at the front of the casing 10 with respect to the display 12. In
FIG. 2, the touch sensor 13 is illustrated as a rectangle with a
broken line. The touch sensor 13 is made of a transparent material,
and as shown in FIGS. 2 and 3, is mounted to the front of the
casing 10 so as to be a part of the casing 10. The touch panel 11
described with reference to FIG. 1 includes the display 12 and the
touch sensor 13.
[0032] As shown in FIG. 3, a supporting member 14 for reinforcing
the mechanical strength of the display 12 is mounted to the rear
side of the display 12. Further, a first substrate 15, a battery
16, a speaker 17 and a second substrate 18 are mounted to the rear
side of the supporting member 14 from the upside of FIG. 3 in
order. Referring to FIG. 4, it is apparent that the main portion of
the rear side of the casing 10 is occupied by the first substrate
15, the battery 16 and the second substrate 18. The speaker 17 and
a vibrator 19 used for call alert in a manner mode are mounted to
the second substrate 18.
[0033] As shown in FIG. 4, a first feeding point 21 and a second
feeding point 22 are mounted in the vicinity of the center of the
upper side in the first substrate 15. Each of the first feeding
point 21 and the second feeding point 22 is connected to an RF
circuit (not shown) loaded on the first substrate 15. As shown in
FIG. 4, the third feeding point 23 is mounted in the vicinity of
the left and lower end of the second substrate 18. The third
feeding point 23 is connected to an RF circuit (not shown) loaded
on the first substrate 15 via a connection line (not shown) (for
example, a coaxial cable) connecting between the first substrate 15
and the second substrate 18. In addition, the third feeding point
23 may be connected to an RF circuit (not shown) mounted on the
second substrate 18.
[0034] As shown in FIG. 4, a first antenna element 31, a second
antenna element 32 and a third antenna element 33 are connected to
the first feeding point 21, the second feeding point 22 and the
third feeding point 23, respectively. The first antenna element 31
and the second antenna element 32 are built in the casing 10 using
the upper mounting space of the casing 10 in FIG. 4. The third
antenna element 33 is built in the casing 10 using the lower
mounting space of the casing 10 in FIG. 4.
[0035] While a part of each antenna element related to the first
embodiment has been described with reference to the side view of
FIG. 3, which for simplicity does not illustrate the antenna
element, the characteristics of each antenna element related to the
first embodiment when viewed from the side of the casing 10 will be
described later, with reference to FIG. 5. As shown in FIG. 4, the
camera 20 is mounted to the upper mounting space of casing 10 at a
position between the first antenna element 31 and the second
antenna element 32.
[0036] As shown in FIG. 4, the third antenna element 33 is formed
as an open-ended line, and, regarding voltage distribution along
the line when power is fed to through the third feeding point 23,
voltage with a relatively high amplitude is distributed at the open
terminal (for example, an open-ended monopole antenna). In
addition, current with relatively high amplitude is distributed at
a power-supply terminal. In FIG. 4, as in FIG. 2, the touch sensor
13 is represented by a rectangle with a broken line.
[0037] As shown in FIG. 4, when viewed from the rear side of the
casing 10 (i.e., when viewed from the direction perpendicular to
the front of the casing 10; the case when viewed from the front is
also the same), the power-supply terminal and the open terminal of
the third antenna element 33 are respectively mounted so as to be
located inside and outside of a range that the touch sensor 13
occupies.
[0038] As described above, since an electrical wiring line for
transmitting detected position information is mounted in the
peripheral portion of the touch sensor 13, it may lead to an
unfavorable influence on the characteristics of the antenna. In
particular, in a layout in which a portion where the voltage with
relatively high amplitude is distributed when power is fed to the
antenna is hidden by the touch sensor 13, such influence is too
much. According to the first embodiment, as shown in FIG. 4, by
selecting a configuration in which the open terminal of the third
antenna element 33 is arranged beside a range that the touch sensor
13 occupies (i.e., not hidden by the touch sensor 13), such
unfavorable influence is able to be reduced.
[0039] In addition, as shown in FIG. 4, the first antenna element
31 and the second antenna element 32 are arranged so that the open
terminals are not hidden by the touch sensor 13 when viewed from a
direction perpendicular to the front of the casing 10. Thus, since
the influence on the first antenna element 31 and the second
antenna element 32 caused by the electrical wiring line formed at a
peripheral portion of the touch sensor 13 is reduced, deterioration
in characteristics of the antenna is able to be suppressed.
[0040] Referring to FIG. 2 or FIG. 4, a portion located beside a
range that the touch sensor 13 occupies in the casing 10
corresponds to the periphery of the casing 10 when the casing 10 is
viewed from a direction perpendicular to the front of the casing
10. This is based on the fact that the ratio of the area occupied
by the touch sensor 13 with respect to the front or rear area of
the casing 10 is relatively large in FIG. 2 or FIG. 4. On the other
hand, if the area ratio that the touch sensor 13 occupies is not so
large, the visible portion beside the portion that the touch sensor
13 occupies may be not limited to the periphery of the casing
10.
[0041] FIG. 5 is a side view illustrating the wireless device 1 of
FIG. 3 on an enlarged scale, in which the second feeding point 22,
the second antenna element 32, the third feeding point 23 and the
third antenna element 33 are added. Similarly to FIG. 3, the left
side corresponds to the front of the casing 10, and the right side
corresponds to the rear side of the casing 10, respectively. For
simplicity, description of elements shown in FIG. 5 similar to
elements shown in FIG. 3 or 4 will be omitted.
[0042] As shown in FIG. 5, a portion including a position connected
to the second feeding point 22 of the second antenna element 32 is
formed so as to be heading toward the rear side of the casing 10.
In addition, a portion including a position connected to the third
feeding point 23 of the third antenna element 33 is formed so as to
be heading toward the rear side of the casing 10. Thus, by
disposing the antenna elements within the limited mounting space as
far as possible from the touch sensor 13, the influence of the
peripheral electrical wiring line of the touch sensor 13 on the
antenna elements is able to be reduced.
[0043] FIG. 6 is a side view illustrating a modification of the
wireless device 1, in which the second substrate 18 shown in FIG. 5
is extended such that the lower position of the second substrate 18
shown in FIG. 5 corresponds with the lower position of the touch
sensor 13 at a direction perpendicular to the paper. Similarly to
FIG. 3 or FIG. 5, the left side corresponds to the front of the
casing 10, and the right side corresponds to the rear side of the
casing 10, respectively. For simplicity, description of elements
shown in FIG. 6 similar to elements shown in FIG. 5 will be
omitted.
[0044] In FIG. 6, a broken line proceeding from the lower end to
the right side of the touch sensor 13 is represented. The portion
of the third antenna element 33 located above the broken line is
the portion hidden by the touch sensor 13 when viewed from the
front of the casing 10, as shown in FIG. 6. As shown in FIG. 6, by
extending the second substrate 18 in a downward direction, the
second substrate 18 is arranged between the portion of the third
antenna element 33 hidden by the touch sensor 13 and the touch
sensor 13. Further, by mounting a conductive member (for example, a
conductor pattern) to the second substrate 18, the conductive
member is arranged between the portion of the third antenna element
33 hidden by the touch sensor 13 and the touch sensor 13.
[0045] If ground potential is applied to the conductive member, the
isolation effect between the third antenna element 33 and the touch
sensor 13 is able to be increased. In particular, if the
radio-frequency current in the vicinity of the third feeding point
23 is relatively high, a further improved isolation effect is able
to be obtained.
[0046] The first antenna element 31, the second antenna element 32
or the third antenna element 33 may be implemented by, for example,
a folded monopole antenna or an inverted-F antenna, besides an
open-ended monopole antenna. In addition, any other antennas may be
used.
[0047] The first antenna element 31, the second antenna element 32
and the third antenna element 33 are mounted in the vicinity of the
one short side of the rectangular casing 10. This is because if the
area that the display 12 occupies is large, it is difficult to
obtain the antenna mounting space in the vicinity of the long side
of the rectangular due to the need for strength in the casing.
[0048] As shown in the first embodiment, a plurality of antenna
elements (for example, the first antenna element 31 and the second
antenna element 32) may be mounted in the vicinity of the one short
side of the rectangle, and the one side and the other side of a
plurality of antenna elements (for example, the first antenna
element 31 and the third antenna element 33) may be mounted in the
vicinity of the upper short end and lower short side of the
rectangle, respectively.
[0049] In addition, according to the wireless device 1 of the first
embodiment, as shown in FIG. 4, the first feeding point 21 and the
second feeding point 22 are mounted in the vicinity of the center
of the upper short end of the casing 10. According to such a
configuration, when a user views the screen unit 12 with the short
side of the wireless device 1 (a state that the wireless device 1
in FIG. 2 is rotated by 90 degrees counterclockwise) grasped by
both hands, thereby overlapping the position of the first feeding
point 21 and the second feeding point 22 with the position of the
one hand (in this case, a left hand). Thus, the possibility that
the performance of the antennas will deteriorate is able to be
decreased. Furthermore, since a fitting rib for assembling the
casing 10 is able to be formed far from the first feeding point 21
and the second feeding point 22, instances of breakage or bad
contact regarding these feeding points is able to be reduced.
[0050] As shown in FIG. 4, any functional parts such as a camera 20
may be mounted between the first feeding point 21 and the second
feeding point 22. Since space corresponding to the feeding points
of the antenna can be formed so that the influence due to the close
metal contained in the functional parts is less than the position
of high electric field (for example, the ends of the antenna
element, etc.), space between the two feeding points can be
efficiently utilized.
[0051] For example, when the wireless device 1 has a function of
receiving Digital Terrestrial Television Broadcasting (DTTB), the
second antenna element 32 may be used as an antenna for DTTB
reception. By disposing the second antenna element 32 in the left
and upper part when viewed from the user, when a user views the
screen unit 12 with the short side of the wireless device 1 grasped
by both hands, the possibility of deterioration in reception
performance due to the second antenna element 32 being hidden by
the user's left hand is able to be decreased.
[0052] According to the first embodiment of the invention described
above, in a wireless device where a touch panel occupies the
majority of the area of the casing, deterioration in the
performance of the antenna caused by the antenna element being
hidden by the touch sensor is able to be suppressed.
Second Embodiment
[0053] Next, a second embodiment of the invention will be described
with reference to FIGS. 7 to 12. For simplicity, description of
configurations similar to the wireless device 1 related to the
first embodiment shown in FIGS. 1 to 5 will be omitted. Each
configuration of the wireless device 5 related to the second
embodiment of the invention, other than the elements of the
wireless device 1, will be described hereinafter.
[0054] FIG. 7 is a front view illustrating the main configurations
of the wireless device 5 related to a second embodiment of the
invention when viewed from the front of the paper as in FIG. 2. The
wireless device 5 includes the display 52 in the front of the
casing 50. For the wireless device 5, a first feeding point 61 and
a second feeding point 62 are mounted at the upper part of the
casing 50 in FIG. 7, and a first antenna element 71 and a second
antenna element 72 respectively connected to the feeding points are
built in the casing 50.
[0055] As shown in FIG. 7, the first feeding point 61 and the
second feeding point 62 are mounted in the vicinity of the center
of the upper short end of the casing 50. The open end of the first
antenna element 71 is bent to a direction close to the first
feeding point 61 and located in the vicinity of the center of the
upper short side of the casing 50. The open end of the second
antenna element 72 is bent to a direction close to the second
feeding point 62 and located in the vicinity of the center of the
upper short side of the casing 50.
[0056] FIG. 8 is a diagram illustrating a state where the wireless
device 5 in the same direction shown in FIG. 7 is grasped by a left
hand. For simplicity, reference numerals for each element will be
omitted. As shown in FIG. 8, according to the arrangement of the
first feeding point 61, the second feeding point 62, and the shape
of the first antenna element 71 and the second antenna element 72,
the possibility that the feeding points of the respective antenna
elements and the end portion where a voltage with a relatively high
amplitude is distributed are covered by the left hand is able to be
decreased.
[0057] FIG. 9 is a diagram illustrating a state where the wireless
device 5 is rotated counterclockwise by 90 degrees from the state
shown in FIG. 7 and grasped by both hands. For simplicity,
reference numerals for each element will be omitted. As shown in
FIG. 9, according to the arrangement of the first feeding point 61,
the second feeding point 62, and the shape of the first antenna
element 71 and the second antenna element 72, the possibility that
the feeding points of respective antenna elements and the end
portion where a voltage with a relatively high amplitude is
distributed are covered by the left hand is able to be
decreased.
[0058] FIG. 10 is a front view illustrating a modification of the
wireless device 5 as the main configurations of a wireless device
5M when viewed from the front of the paper as in the FIG. 7. In
addition to the elements of the wireless device 5, the wireless
device 5M further includes the third feeding point 63, the third
antenna element 73 and the fourth antenna element 74. The third
feeding point 63 is mounted at the right and lower part of the
casing 50 in FIG. 10. The third antenna element 73 and the fourth
antenna element 74 are connected to the third feeding point 63 and
built in the casing 50. Other elements besides the elements
described above are similar to elements shown in FIG. 7, for
simplicity, description thereof will be omitted.
[0059] As shown in FIG. 10, the open end of the third antenna
element 73 is bent to a direction close to the third feeding point
63 and located in the vicinity of the center of the lower short
side of the casing 50. The open end of the fourth antenna element
74 is located in the vicinity of the center of the lower short side
of the casing 50.
[0060] FIG. 11 is a diagram illustrating a state where the wireless
device 5M in the same direction shown in FIG. 10 is grasped by a
left hand. For simplicity, reference numerals for each element will
be omitted. As shown in FIG. 11, according to the arrangement of
the first feeding point 61, the second feeding point 62 and the
third feeding point 63, and the shape of the first antenna element
71, the second antenna element 72, the third antenna element 73 and
the fourth antenna element 74, the possibility that the feeding
points of respective antenna elements and the end portion where a
voltage with a relatively high amplitude is distributed are covered
by the left hand is able to be decreased.
[0061] FIG. 12 is a diagram illustrating a state where the wireless
device 5M is rotated counterclockwise by 90 degrees from the state
shown in FIG. 10 and grasped by both hands. For simplicity,
reference numerals for each element will be omitted. As shown in
FIG. 12, according to the arrangement of the first feeding point
61, the second feeding point 62 and the third feeding point 63, and
the shape of the first antenna element 71, the second antenna
element 72, the third antenna element 73 and the fourth antenna
element 74, the possibility that the feeding points of respective
antenna elements and the end portion where a voltage with a
relatively high amplitude is distributed are covered by the left or
right hands is able to be decreased.
[0062] FIG. 13 is a diagram illustrating each part of the third
antenna element 73 and the fourth antenna element 74 shown in FIG.
10. In the example shown in FIG. 13, by insert-molding a plate to a
surface of an antenna member 70 made of resin, the third antenna
element 73 and the fourth antenna element 74 are formed (the
molding technique for the antenna element is not limited to the
above method, but may include any other molding methods). The third
antenna element 73 is formed of a folded monopole antenna, and one
end of the antenna element 73 opposite to the third feeding point
63 is grounded. The fourth antenna element 74 is formed of an
open-ended monopole antenna having a relatively wide shape.
[0063] The power-supply terminal and the ground terminal of the
third antenna element 73, as shown in FIG. 13, may be grounded and
power-fed through matching circuits 77 and 78 having, for example,
a reactance element, etc. By providing a suitable connection
position 79 between a going line and a coming line in the third
antenna element 73, impedance viewed from the third feeding point
63 can be adjusted.
[0064] As described above, by selecting the arrangement and the
shape of an antenna element according to the second embodiment of
the invention, even when a user grasps a wireless device in which a
touch panel occupies the majority of the area of the casing,
deterioration in the performance of the antenna caused by the hands
can be suppressed.
[0065] In descriptions of the respective embodiments,
configuration, shapes, connection manners and molding methods of a
wireless device, a touch panel and an antenna, and shape and
arrangement of other elements are exemplarily illustrated, and thus
various modifications can be made without departing from the spirit
or scope of the invention. For example, the casing of the wireless
device is not limited to a single element; the invention is
applicable to a wireless device having a configuration in which two
or more casings are movably connected with each other.
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