Communications: radio wave antennas – Antennas – With radio cabinet
Reexamination Certificate
2002-08-06
2004-11-30
Wong, Don (Department: 2821)
Communications: radio wave antennas
Antennas
With radio cabinet
C343S846000
Reexamination Certificate
active
06825811
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a display-antenna integral structure, in which a built-in antenna and a display used for a mobile phone and so on are integrated.
2. Related Art of the Invention
Mobiles phone terminals have rapidly decreased in size and thickness. Further, antennas have been integrated in the housings of mobile phone terminals in accordance with the worldwide trend.
FIG.
12
(
a
) is a perspective view schematically showing a configuration of a built-in antenna of a mobile phone terminal according to a conventional technique. FIG.
12
(
b
) is a side view showing the same. In FIGS.
12
(
a
) and
12
(
b
), an antenna element
1201
is means of transmitting and receiving radio waves from a mobile phone terminal, a substrate
1202
is means having a shield case
1206
and a communication radio circuit
1207
integrated in the shield case
1206
, and an LCD display
1203
is means of displaying information of the mobile phone terminal.
Moreover, the antenna element
1201
is fed from a feeding point
1204
on the substrate
1202
and has an end electrically connected to a part of the substrate
1202
via a conductive connecting part
1205
. Here, the part of the substrate
1202
and the shield case
1206
are electrically connected to each other and serve as a grounding plate of the antenna element
1201
. Therefore, the antenna element
1201
, the part of the substrate
1202
, and the shield case
1206
constitute the built-in antenna.
The built-in antenna of the conventional mobile phone terminal has the above-described configuration. In order to respond to smaller and thinner terminals, as shown in FIG.
12
(
b
), the conventional built-in antenna substantially has three layers of the antenna element
1201
, the substrate
1202
, which includes the radio circuit
1207
and is provided for forming the grounding plate, and the LED display
1203
. Since the substrate
1202
is included, the thickness is considerably large and has been obstruction of realizing a thinner terminal.
As a technique for solving the above-described problem, a configuration example shown in FIGS.
13
(
a
) and
13
(
b
) has been proposed: in a housing
1301
of a mobile phone terminal, a space for a built-in antenna is provided on the upper part of an LCD display
1203
, a part of a substrate
1202
is placed as a grounding plate
1208
in the space on the side of an LCD display screen
1203
a
, and an antenna element
1201
is placed so as to be opposed to the grounding plate
1208
. Here, FIG.
13
(
a
) schematically shows a side sectional view of the mobile phone terminal, and FIG.
13
(
b
) schematically shows the front of the terminal.
However, mobile phone terminals have been transformed into data terminals from conventional telephones, and displays thereof have remarkably increased in size.
In response, when the space for the antenna is obtained on the upper part of the LCD display as shown in the configuration example of FIGS.
13
(
a
) and
13
(
b
), the larger the display, the mobile phone terminal increases in height. The increased height has made it difficult to achieve folding-type mobile phone terminals that are suitable for larger displays.
SUMMARY OF THE INVENTION
The present invention has been achieved in view of the above-described problem and provides a display-antenna integral structure, a communication apparatus, and a portable communication terminal, whereby even when a display is larger, a space for a built-in antenna can be sufficiently obtained and a housing can be reduced in thickness.
One aspect of the present invention is a display-antenna integral structure comprising an antenna and a display
wherein said antenna has an antenna element and a grounding plate,
said antenna element and said display are opposed to each other, and
a part of said display has conductivity and is commonly used as said grounding plate.
Another aspect of the present invention is the display-antenna integral structure,
wherein said display comprises a display main body,
a frame provided around said display main body, and
a reflecting plate provided on a back of an image display screen of said display main body, and
all or part of said reflecting plate has conductivity and is commonly used as said grounding plate.
Still another aspect of the present invention is the display-antenna integral structure,
wherein said reflecting plate and said antenna element are integrally-molded.
Yet still another aspect of the present invention is the display-antenna integral structure,
wherein said display comprises a display main body, and
a frame provided around said display main body, and
all or part of said frame has conductivity and is commonly used as said grounding plate.
Still yet another aspect of the present invention is the display-antenna integral structure,
wherein said frame and said antenna element are integrally-molded.
A further aspect of the present invention is the display-antenna integral structure,
wherein said display further comprises a reflecting plate provided on a back of an image display screen of said display main body, and
all or part of said reflecting plate has conductivity and is commonly used as said grounding plate.
A still further aspect of the present invention is the display-antenna integral structure,
wherein said frame and reflecting plate are integrally-molded and are commonly used as said grounding plate.
A yet further aspect of the present invention is a communication apparatus comprising said display-antenna integral structure and a housing for storing said display-antenna integral structure,
wherein at least all or part of said housing opposed to said antenna element has conductivity and is commonly used as said grounding plate.
A still yet further aspect of the present invention is the display-antenna integral structure,
wherein no driving circuit for driving said display is provided between said antenna element and said display.
An additional aspect of the present invention is the display-antenna integral structure, further comprising a dielectric provided entirely or partially in a space between said antenna element and said grounding plate.
A still additional aspect of the present invention is the display-antenna integral structure,
wherein said antenna resonates at a plurality of frequencies.
A yet additional aspect of the present invention is the display-antenna integral structure,
wherein a part of said frame on the side of said image display screen extends on a surface space adjacent to said display,
said antenna element partially extends in a direction of said surface space,
said extended frame and said antenna element are opposed to each other in said surface space, and
a feeding point of said antenna element is provided on said opposing part.
A still yet additional aspect of the present invention is the communication apparatus,
wherein said antenna element partially extends in a direction of a surface space adjacent to said display,
said extended antenna element is partially opposed to the conductive part of said housing, and
a feeding point of said antenna element is provided on said opposing part.
A supplementary aspect of the present invention is the display-antenna integral structure,
wherein said antenna element and said display are partially opposed to each other, and
a driving circuit for driving said display is provided on a back of a remainder of said display, said remainder not being opposed to said antenna element.
A still supplementary aspect of the present invention is the communication apparatus,
wherein a part not being opposed to said antenna element on said housing has no conductivity.
A yet supplementary aspect of the present invention is the display-antenna integral structure,
wherein said antenna further comprises a passive element on a side having said antenna element placed thereon, said element being opposed to said display.
A still yet supplementary aspect of the present invention is the display-antenna integral structure, further comprising a plurality of said antenna ele
Iwai Hiroshi
Kosugi Hiroaki
Ogawa Koichi
Yamada Ken'ichi
Yamamoto Atsushi
Matsushita Electric - Industrial Co., Ltd.
RatnerPrestia
Tran Chuc
Wong Don
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