JP2007306347A - Portable terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the receiving quality of a portable terminal for receiving terrestrial digital television broadcast or the like during the viewing of the TV or the like. <P>SOLUTION: A second casing 11b of a cellular phone having a tuner of a digital TV or the like can be rotated at 90° and more around a contact with a rotary mechanism part 17 connected to a first casing 11a as a rotation axis. A cellular antenna 18 is arranged in the vicinity of a microphone of the first casing 11a, a TV/radio antenna 15 is arranged on the upper end part of the first casing 11a and a TV/radio diversity receiving antenna 16 is arranged on the second casing 11b. Switching diversity reception is performed by switching the connection of the antenna 15 or the antenna 16 to the TV tuner by a control signal from a control part to a switching part. In the case of viewing the TV while carrying the cellular phone with a hand, a picture display of a liquid crystal display part 14 is changed to long sideways display by rotating the display at 90° so as to view a large screen and then the second casing 11b can be rotated at 90°. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mobile terminal, and more particularly to a technique for improving communication quality of a mobile terminal.

  In recent years, mobile phones with a TV (TV) function are gradually spreading. In particular, one-segment broadcasting, which is a terrestrial digital TV broadcast for mobile phones that began on April 1, 2006, is much stronger in receiving and moving images than analog broadcasting. It has been sent.

  Many portable terminals with a TV function are designed so that images can be easily viewed when displayed on a horizontally long screen by a biaxial rotating hinge or the like. As the antenna to be mounted, a whip antenna arranged mainly in the lower housing is adopted, and when watching TV broadcast, the whip antenna is pulled out and used.

JP 2005-260701 A

  When video data such as video and TV is received by a portable terminal, higher quality communication is required due to the large amount of information. In addition, since the video data is easier to see when the display screen is larger and the power increases, many mobile phones with a TV function are designed so that the video data can be viewed in a horizontally long display. . On the other hand, as the display screen becomes larger, the problem that the deterioration of image quality due to the deterioration of communication quality becomes more conspicuous becomes obvious, so the larger the display screen, the higher the quality of communication necessary. Become.

  As one means for improving communication quality, a method of using a relatively large and good antenna such as an earphone antenna as an external antenna is used. However, when using an earphone antenna or an external antenna, it is necessary to always carry the earphone or the external antenna. Especially when using an earphone antenna, the antenna characteristics are greatly increased by routing the cable. There are problems such as fluctuation.

  On the other hand, diversity reception technology is known as another means for improving communication quality. However, since the video data and the like as described above are mainly serviced in a low band of the UHF band, In such a small case, the distance between the sub-antenna for diversity and the main antenna cannot be sufficiently secured, and the effect as space diversity and the great diversity effect due to the deterioration due to mutual coupling between antennas can be obtained. Absent.

  In addition, as in the technique described in Patent Document 1 below, a method of performing diversity reception using an earphone antenna and an antenna mounted on a mobile phone by combining the above two points has also been proposed. However, it is necessary to carry the earphone, and there still remains a problem that the characteristics of the earphone antenna greatly fluctuate depending on the routing and usage method.

  The present invention has been made in view of such problems, and it is an object of the present invention to provide a diversity antenna arrangement technique that is more efficient when using a horizontally long screen for viewing video data that requires high communication quality. To do.

  The present invention provides a rotation mechanism that can rotate a first housing and a second housing having a display unit so as to have a rotation axis that is parallel to the thickness direction of the second housing. Diversity reception of content to be displayed on a display unit using a first antenna disposed in a first housing and a second antenna disposed in a second housing When the second casing is rotated, the receiving position in the state where the major axis direction of the second antenna and the major axis direction of the second antenna intersect with each other is received. It is a position. In particular, it is preferable to arrange them so as to be substantially orthogonal.

  For example, when holding a mobile terminal of the present invention in hand and viewing video data of landscape display such as a TV, many users first display the display unit from a vertically long display state in order to project a large image on the display unit. For example, it is rotated 90 degrees in software so that a landscape display state is obtained. Next, the second housing on which the display portion is mounted is rotated by 90 degrees. At this time, the long side direction of the second housing and the display unit is substantially parallel to the horizontal plane, and the current flowing through the built-in antenna is also parallel to the horizontal plane, so that the polarization is substantially horizontal polarization. At the same time, since the direction of the current flowing through the whip antenna and the direction of the current flowing through the built-in antenna are orthogonal, the polarization planes of the respective antennas are also orthogonal. Therefore, the polarization diversity effect can be obtained by the first and second antennas.

  As described above, according to the mobile terminal of the present invention, when receiving and viewing video data such as TV with the display unit of the mobile terminal in the landscape display state, higher quality communication is possible, and communication quality is improved. Can be improved.

  Also, when the rotation mechanism has a structure connected to the upper end of the first casing and the lower end of the second casing, the second casing is rotated 90 degrees to display The same effect can be obtained when the portion is displayed horizontally. In addition, since the total length of the mobile phone becomes longer when the second casing is rotated 180 degrees, the transmitter becomes closer to the mouth and the transmitter transmits the voice of the user. It becomes easy to recognize. Further, when the second casing is not rotated, the entire length of the mobile phone is shortened, so that it is easy to carry.

  By configuring the first antenna and the second antenna with antennas that can be pulled out, such as whip antennas, the respective antenna characteristics are improved and the communication quality is further improved.

  According to another aspect of the present invention, a second housing having a hinge portion that connects the first housing and the third housing so as to be openable, a display portion, and the third housing. In a portable terminal having a rotation mechanism portion that rotatably connects a body with a rotation axis that is parallel to the thickness direction of the second casing, the first terminal disposed in the first casing Diversity reception of content to be displayed on the display unit is performed using the first antenna and the second antenna arranged in the second housing, and the second antenna is rotated to rotate the first antenna. There is provided a portable terminal characterized in that the major axis direction and the major axis direction of the second antenna are configured to be substantially orthogonal.

  With respect to this portable terminal as well, the same effect can be obtained with respect to the reception characteristics when the second casing is rotated 90 degrees and the display unit is displayed in landscape orientation. In addition, when the user looks at the portable terminal on a desk or the like, both the whip antenna and the built-in antenna become horizontally polarized waves, and the effect of polarization diversity cannot be obtained. Are orthogonal to each other and the directivity becomes a figure of 8, so that the effect of directivity diversity can be obtained.

  As described above, when receiving and viewing video data with this mobile terminal displayed in landscape orientation, communication quality has been improved not only when the user views it while holding it in his / her hand but also when viewing it on a desk or the like. Is possible.

  The same effect can be obtained even if the position of the rotation axis of the second casing is changed. Since the distance between the hinge part and the second casing when rotated by 90 degrees can be adjusted by moving the rotation axis, the width of (design) in the casing design is widened.

  In addition, by making the first antenna and the second antenna antennas that can be pulled out, such as whip antennas, the respective antenna characteristics are improved and the communication quality is further improved.

  According to another aspect of the present invention, at least two or more rotating shafts that connect the first housing and the second housing provided with a display unit or the like so as to be openable and closable and rotatable in an orthogonal direction are provided. Diversity of contents displayed on a display unit using a first antenna disposed in a first housing and a second antenna disposed in a second housing in a portable terminal having the hinge portion A portable terminal is provided in which the long axis direction of the first antenna and the long axis direction of the second antenna are substantially orthogonal to each other by performing reception and rotating the second housing.

  By using a pullable antenna such as a whip antenna for the first antenna and the second antenna, the characteristics of the antenna itself are improved and the communication quality is improved.

  According to the portable terminal of the present invention, it is possible to obtain at least two types of diversity effects of spatial diversity, polarization diversity, or directional diversity depending on the state of the portable terminal, and there is an advantage that the reception sensitivity of the system can be improved. is there.

  The diversity antenna refers to an antenna that uses two receiving antennas, and there are various types such as polarization diversity, spatial diversity, frequency diversity, and the like. In the plain, television radio waves are generally sent by a method called horizontal polarization, and in the mountainous area, vertical polarization is often used. In applications where the radio wave condition changes as a mobile terminal or a car moves, the influence of fading is large, so that the diversity system is used to receive the signal as best as possible. In the diversity system, a plurality of antenna elements (about 2 to 4) are arranged in different places. For example, in the case of switching diversity or selective diversity, only one is actually used for reception, and the most suitable element for each location is automatically detected and switched, and the body such as the housing It is preferable to use the metal part as far as possible so as not to cause interference. There are various other methods such as synthetic diversity.

  Hereinafter, a mobile terminal according to an embodiment of the present invention will be described using a mobile phone as an example with reference to the drawings. 1 and 2 are diagrams showing a mobile phone according to a first embodiment of the present invention. FIG. 1A is a view of a mobile phone as viewed from the front, and FIG. 1B is a liquid crystal display unit 14 (display unit: liquid crystal is an example in a mobile phone, and display based on organic EL, LED, etc. FIG. 2 is a block diagram showing details of diversity reception. FIG. 2 is a diagram showing a state when the second housing 11b in which the second housing 11b is arranged is rotated 90 degrees.

  The cellular phone includes a digital TV / radio tuner, and further includes a first housing 11a having an operation unit 12 and the like, and a second housing 11b having a liquid crystal display unit 14 and the like. 17 is connected.

  Further, as shown in FIG. 1B, the second casing 11b has at least 90 degrees on a plane perpendicular to the thickness direction of the second casing 11b itself with the contact point with the rotation mechanism portion 17 as a rotation axis. The rotation is thus possible (see arrow AR1). Further, the cellular phone has a cellular antenna 18 disposed at the mouth of the first casing 11a (near the microphone), and a whip type (drawer type) for TV / radio at the upper end of the first casing 11a. The antenna 15 for diversity reception for TV / radio is arranged in the second casing 11b so as to be parallel to the long side direction of the liquid crystal display unit 14.

  Here, the antenna format of the diversity receiving antenna 16 is a dipole antenna. As shown in FIG. 2, the cellular phone according to the present embodiment receives switching diversity by switching the connection between the antenna 15 or the antenna 16 and the TV tuner 111 according to a control signal transmitted from the control unit 19 to the switching unit 110. (Reception switching unit). When viewing a TV with a mobile phone in hand, since the TV image is horizontally long, first, the screen display of the liquid crystal display unit 14 is, for example, 90 degrees in terms of software so that many users view on a larger screen. After rotating and changing from portrait display to landscape display (display switching unit), as shown in FIG. 1B, the second casing 11b can be rotated 90 degrees, for example.

  At this time, the directions of currents flowing through the diversity receiving antenna 16 and the whip antenna 15 are orthogonal to each other. The diversity receiving antenna 16 is substantially horizontally polarized and the whip antenna 15 is substantially vertically polarized. Thus, the polarization diversity effect can be obtained because the polarization of each antenna is different and orthogonal. Therefore, in the mobile phone according to the present embodiment, it is possible to obtain a good reception sensitivity and improve the communication quality when performing TV viewing or the like with the screen display on the mobile phone being displayed horizontally. There are advantages. In addition, although it cannot be expected that the effect as great as the case where the second casing 11b is rotated, the effect of space diversity between the two antennas can be obtained even when the second casing 11b is not rotated.

  In this embodiment, switching diversity is used as diversity reception. However, other types of diversity reception such as synthesis diversity and selectivity diversity performed by using two TV tuners may be used, and similar effects are obtained. Can be obtained. The effect is not particularly dependent on the location of the cellular antenna 18 and the same effect can be obtained. In addition, an example in which the two antennas are in a state of being substantially orthogonal when viewing content is shown, but it is not necessarily required to be orthogonal, and an effect of improving the reception state can be obtained if the antennas are arranged so as to intersect each other. . The same applies to the following embodiments.

  Next, a second embodiment of the present invention will be described with reference to the drawings. 3A (A) to 3 (C) are views showing the state of the mobile phone according to the present embodiment, FIG. 3A (A) is a view of the mobile phone as viewed from the front, and FIG. FIG. 3A is a diagram showing a state (AR2) in which the second casing 21b in which the liquid crystal display unit 24 is arranged in the cellular phone is rotated 90 degrees, and FIG. It is a figure which shows a mode that the 2nd housing | casing 21b was rotated only 180 degree | times from the reference position shown to FIG. 3A (A) (AR3).

  The configuration of the mobile phone according to the present embodiment is the same as that of the first embodiment, but the position where the rotation mechanism unit 17 is provided in the first embodiment is changed, and the upper end of the first casing 21a is changed. The difference is that the rotating mechanism 27 connects the overlapping portions of the first portion and the lower end of the second housing 21b. The effect of the present embodiment is the same as the effect of the first embodiment, but the shape of the mobile phone according to the present embodiment is the same as that of the second housing 21b as shown in FIG. 3A (C). The liquid crystal display unit 24 is configured so that it can be made compact when carried by being rotated so that the lower end of the first casing 21a and the upper end of the second casing 21b overlap each other. Even if the size of the mobile phone is increased, it is excellent in that the size in the minimum form of the mobile phone itself does not become too large.

  FIG. 3B is a diagram illustrating an arrangement example of antennas different from FIG. 3A, and the same reference numerals are attached. 3B is that the positional relationship between the built-in antenna 26 and the whip antenna 25 is reversed with the liquid crystal unit 24 interposed therebetween. Such an arrangement is also excellent in that interference between the two antennas can be reduced because the current flowing directions of the two antennas are orthogonal when the arrangement shown in FIG. 3B (B) is used. 3A and 3B, it is better to arrange the two antennas as far apart as possible.

  Next, a mobile phone according to a third embodiment of the present invention will be described with reference to the drawings. 4A to 4C are diagrams showing the configuration of the mobile phone according to the present embodiment, FIG. 4A is a view of the mobile phone as viewed from the front, and FIG. FIG. 4C is a diagram illustrating a state when the second casing 31b in which the liquid crystal display unit is disposed in the cellular phone is rotated 90 degrees, and FIG. 4C is a diagram illustrating the cellular phone viewed from the rear. is there. FIG. 5A is a diagram showing the mobile phone viewed from the right side, and FIG. 5B is a whip antenna in which the first casing 31a and the second casing 31b are closed. FIG. 5C is a diagram in which the horizontal line of the first casing 31a and the horizontal line of the second casing 31b intersect each other at 120 degrees. It is a figure which shows a mode that the state which opened the mobile telephone was seen from the right side.

  The cellular phone according to the present embodiment is equipped with a digital TV / radio tuner, and further includes a first casing 31a having an operation unit 32 and the like, a second casing 31b having a liquid crystal unit 34 and the like, and a rotation. A third housing 31c having a mechanism portion 37 and the like, and the first housing 31a and the second housing 31b can be opened and closed at the hinge portion 33 as shown in FIG. It is connected to the. The second housing 31b and the third housing 31c are connected by the rotation mechanism unit 37, and the second housing 31b can be rotated at least 90 degrees as shown in FIG. 4B.

  The mobile phone according to the present embodiment has a TV / radio receiving whip antenna 35 in the vicinity of the hinge portion 33 of the casing 31a, and a diversity receiving built-in antenna 36 inside the casing 31b. 34 is arranged so as to be parallel to the long side direction. The antenna form of the built-in antenna 36 uses a dipole antenna. Furthermore, a gravity sensor (not shown) is mounted on the second casing 31b of the mobile phone. The display content of the liquid crystal display unit 34 is a vertically long display when the long side direction of the liquid crystal display unit 34 is close to the horizontal plane, and conversely, a horizontal display when the long side direction of the liquid crystal display unit 34 is close to the horizontal plane. It is set to be.

  As described in the first embodiment of the present invention, since a TV image is generally horizontally long, when the user wants to view it on a large screen, the user can display the second image as shown in FIG. The housing 31b is rotated 90 degrees. Then, the display screen of the liquid crystal display unit 34 is automatically displayed in landscape orientation by the gravity sensor. At this time, the direction of current flow in the built-in antenna 36 and the whip antenna 35 is orthogonal, the built-in antenna 36 is substantially horizontally polarized, and the whip antenna 35 is almost vertically polarized. Therefore, in the two antennas 35 and 36, The effect of polarization diversity can be obtained.

  In addition, the mobile phone can be viewed on a desk or the like for TV viewing. In that case, in order to make the image of the liquid crystal display unit 34 easy to see, the angle formed by the housing 31a and the housing 31b is 120 degrees. It is conceivable to use to the extent. At this time, both the built-in antenna 36 and the whip antenna 35 are substantially horizontally polarized, but the direction of current flow of the antenna is orthogonal and the directivity of each is 8 so that the effect of directional diversity is achieved. Obtainable. In addition, although not so great, there is a space diversity effect between the two antennas even when the casing 31b is not rotated by 90 degrees.

  As described above, in the mobile phone according to the present embodiment, in addition to the effect of the first embodiment, the mobile phone according to the present embodiment is configured so as to obtain a directional diversity effect when viewing on a TV placed on a desk. There is an advantage that the communication quality at that time can be improved. Note that this embodiment is more preferably applied to a portable terminal that is used mainly for stationary.

  Next, a mobile phone according to a fourth embodiment of the present invention will be described with reference to the drawings. 6A (A), (B), and FIGS. 7 (A) to (C) are views showing a mobile phone according to the present embodiment, and FIG. 6A (A) is a view of the mobile phone as viewed from the front. 6A (B) is a view showing a state in which the second casing 41b is rotated 90 degrees from the state of FIG. 6A (A). FIG. 6 (A) to FIG. It is the figure which looked at a mode that changes from (A) to Drawing 6A (B) from the back.

  The structure of the mobile phone according to this embodiment is the same as that of the third embodiment, and FIG. 6A corresponds to FIG. The difference from the third embodiment is that the rotation mechanism 37 in the third embodiment is changed as shown below so that the rotation axis of the second casing 41b can be moved. That is, as shown in FIG. 7A, the connecting portion 47b is provided at the rotation center point that becomes the rotation axis of the second casing 41b (rotates like AR8, AR9), and the third casing The slit 47a provided in the body 41c allows the contact point between the connecting portion 47b and the third housing 41c to move on the slit 47a along the direction of the up and down arrows shown in FIGS. 7B and 7C. It is connected. Reference numeral 41c denotes a third housing.

  The effect in the present embodiment is the same as the effect in the third embodiment, but when the second casing 41b is rotated 90 degrees by adding the above-described device to the moving mechanism, the hinge portion 43 and the second casing 41b can be adjusted, particularly by reducing the distance between the second casing 41b and the second casing 41b by further adjusting the position of the connecting portion 47b on the second casing 41b. The range of mobile phone designs that can freely adjust left and right symmetry and asymmetry when 41b rotates 90 degrees is widened.

  6B is a diagram corresponding to FIG. 6A, and as shown in FIG. 6B (B), when the second casing 41b is rotated 90 degrees, the left and right are asymmetric with respect to the first casing 41a. In particular, the internal antenna 46 and the whip antenna 45 are asymmetrical so that the distance between them is increased. This improves the antenna characteristics of each other.

  Next, a mobile phone according to a fifth embodiment of the present invention will be described with reference to the drawings. FIGS. 8A to 9B are diagrams showing the mobile phone according to the present embodiment, FIG. 8A is a view of the mobile phone as viewed from the front, and FIG. FIG. 9A is a diagram showing a state when the second casing 51b in which the liquid crystal display unit 54 is arranged in the cellular phone is rotated 90 degrees, and FIG. 9A is a diagram of the cellular phone viewed from the right side; FIG. 9B is a view of the state in which the first housing 51a and the second housing 51b are closed and the whip antenna 55 is stored as viewed from the right side.

  The cellular phone according to the present embodiment is equipped with a digital analog TV / radio tuner, and further includes a first casing 51a in which an operation unit 52 and the like are arranged, and a second casing in which a liquid crystal display unit 54 and the like are arranged. The body 51b is connected by a hinge portion 53 configured to be openable and closable and rotatable in an orthogonal direction.

  A TV / radio receiving whip antenna 55 is disposed on the hinge portion 53 of the first casing 51a, and a diversity receiving built-in antenna 56 is disposed on the second casing 51b in the long side direction of the liquid crystal display section 54. Are arranged in parallel with each other. The above mobile phone exhibits the same effect as the first embodiment, but since the mobile phone according to the present embodiment is a foldable type, even if the display screen is enlarged, The point that it can be stored compactly is excellent.

  The difference in antenna arrangement between FIG. 3B and FIG. 8B is that the two antennas do not cross when the second casing rotates 90 degrees (the distance between them can be maintained to some extent), so that the coupling between the antennas is reduced. There is an advantage that the characteristics of each antenna are slightly improved.

  Next, a mobile phone according to a sixth embodiment of the present invention will be described with reference to the drawings. FIGS. 10A to 10C are diagrams showing the mobile phone according to the present embodiment, and FIG. 10A is a view of the mobile phone according to the present embodiment as viewed from the front. FIG. 10B is a view of the state where the second casing 61b in which the liquid crystal display unit 64 is arranged is rotated 90 degrees in the cellular phone as viewed from the back side, and FIG. It is the figure which looked at from the back.

  The basic configuration of the mobile phone according to the present embodiment is the same as that of the fourth embodiment, and the second casing 61b rotates with respect to the rotation mechanism portion 67 as indicated by the arrow AR12. The difference is that the diversity receiving built-in antenna 46 in the cellular phone according to the fourth embodiment is replaced with a rod-shaped antenna 66 in this embodiment. As shown in FIG. 10C, the rod-shaped antenna 66 is housed in the back surface of the second housing 61b so as to be pulled out in parallel with the long side direction of the liquid crystal display unit 64. The rod-shaped antenna 66 has substantially the same characteristics as the built-in antenna 46 in the fourth embodiment when housed, but when the rod-shaped antenna 66 is pulled out, it moves away from the housing (antenna GND). Will improve. That is, as described in the description of diversity, the antenna has poor characteristics when close to GND or a metal object. Therefore, the antenna can be pulled out for the purpose of keeping away from GND. By improving the characteristics of the rod-shaped antenna 66, the communication quality can be further improved.

  Next, a cellular phone according to a seventh embodiment of the present invention will be described with reference to the drawings. FIGS. 11A, 11B, and 12 are diagrams showing a mobile phone according to the present embodiment, and the configuration of the mobile phone is the same as that of the first embodiment except for one point described later. 11A, 11B, and 12 correspond to FIGS. 1A, 1B, and 2, respectively.

  The mobile phone according to the present embodiment is different in that a gravity sensor 112 is added to the second casing 11b of the mobile phone according to the first embodiment. When the gravity sensor 112 detects the gravity in the second housing 11b, the control unit 19 determines whether the second housing 11b is in the vertically long state or the horizontally long state by a signal transmitted from the gravity sensor 112. Can do. The switching unit 110 connects the whip-type antenna 15 and the TV radio tuner 111 when the second casing 11b is vertically long according to a control signal from the controller 19, and the second casing 11b is horizontally long. In this case, the antenna 15 and the antenna 16 are switched as in the first embodiment.

  The effect based on the above configuration is the same as in the case of the first embodiment. However, in the mobile phone according to the present embodiment, when the second casing 11b as shown in FIG. Diversity reception is not executed because only the reception effect is not obtained, and only the whip antenna 15 is used, and diversity reception is performed only when the second casing 11b is horizontally long as shown in FIG. Control to run. In the present embodiment, an example is shown in which a gravity sensor is used to determine the state (arrangement) of the second housing 11b. However, other determination means, for example, a means for mechanically determining the position is used. Needless to say, the same effect can be obtained.

  Next, a mobile phone according to an eighth embodiment of the present invention will be described with reference to the drawings. FIGS. 13A and 13B are diagrams showing a mobile phone according to the present embodiment, and FIG. 13A is a view of the mobile phone according to the present embodiment as viewed from the front, and FIG. ) Is a diagram showing a state (AR13) when the second casing 81b in which the liquid crystal display unit is arranged is rotated 90 degrees in the mobile phone according to the present embodiment.

  The configuration of the mobile phone according to the present embodiment is the same as that of the first embodiment except for a part, but a cellular antenna 88 is arranged at the upper end of the first casing 81a, and the first The wireless LAN main antenna 86 is disposed in parallel with the short side direction of the casing 81a, and the wireless LAN sub antenna 85 is disposed in parallel with the short side direction of the second casing 81b. The main antenna 86 and the sub antenna 85 differ in that diversity reception is performed.

  When communication is performed in the above configuration, the main antenna 86 is used for transmission and reception, and the sub-antenna 85 is used only for reception.

  In the first to seventh embodiments, an antenna for diversity reception is arranged in the long side direction of the second casing. On the other hand, in the eighth embodiment, an antenna 85 for diversity reception is arranged in the short side direction of the second casing 81b. As an antenna in the short side direction, an antenna having a relatively high frequency (having a short wavelength) can be used. As an example, diversity of BT can be used. However, diversity reception of a wireless LAN is generally used. Diversity may also be achieved with a cellular antenna. The influence of the transmission of the antenna for cellular use largely depends on the isolation between the antennas, but there is a considerable influence. As a countermeasure, a notch filter or the like can be used for each antenna so as not to be affected.

  According to the present embodiment, as in the first embodiment, when the video data is received using the wireless LAN, the second casing 81b rotates 90 degrees as shown in FIG. 13B. In this case, since the current flowing directions in the main antenna 86 and the sub antenna 85 are orthogonal to each other, polarization diversity is established and reception sensitivity is improved.

  It should be noted that the same effect can be obtained even if this antenna configuration is applied to the mobile phone according to the second to fifth embodiments.

  Next, a cellular phone according to a ninth embodiment of the present invention will be described with reference to the drawings. FIGS. 14A, 14B, and 15 are diagrams showing the mobile phone according to the present embodiment, and FIG. 14A is a view of the mobile phone according to the present embodiment as viewed from the front. FIG. 14B is a diagram showing a state (AR14) in which the second housing 21b in which the liquid crystal display unit 24 is arranged is rotated 90 degrees in the mobile phone according to the present embodiment (FIG. 14). It is a figure which shows the example which changed the rod-shaped shape of the internal antenna 26 in A) into the meander shape.

  The configuration example of the mobile phone according to the present embodiment is basically the same as that of the mobile phone according to the second embodiment, but instead of the whip antenna 25 in the second embodiment, the first casing 21a. The difference is that the built-in antenna 95 is arranged so as to be parallel to the long side direction of the first casing. The obtained effect is the same as in the second embodiment. The built-in antenna 26 may be changed to a meander-shaped antenna 26 'as shown in FIG. 15 as long as the polarization planes are substantially the same, and the effect is basically the same. The same is true if the built-in antenna 95 has a meander shape.

  As described above, in the telephone according to the present embodiment, the example in which the polarizations of the two antennas forming diversity reception are orthogonal to each other has been described. The effect of wave diversity can be obtained.

  Further, in the above embodiments, when the second casing is set in the horizontally long state, strictly speaking, the long axis directions of the two antennas that perform diversity reception are not orthogonal, but FIG. ) And FIG. 5C, the two antennas that perform diversity reception are almost orthogonal to each other if they appear to be orthogonal when viewed from an angle as shown in FIG. Diversity effect can be obtained.

  As described above, the mobile phone according to the present embodiment can obtain at least two types of diversity effects of space diversity, polarization diversity, and directional diversity depending on the state of the mobile phone. There is an effect that the reception sensitivity can be improved. In the above example, a mobile phone has been described as an example. However, the present invention can be applied to other home appliances such as a portable TV and a portable TV having a communication function, such as a portable terminal and a notebook PC.

  The present invention is applicable to a mobile phone having a display function such as television broadcasting.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a mobile phone according to a first embodiment of the present invention, FIG. 1 (A) is a view of the mobile phone as viewed from the front, and FIG. It is a figure which shows a mode when the 2nd housing | casing 11b is rotated 90 degree | times. It is the block diagram which showed the detail of the diversity reception in FIG. 3A (A) to 3 (C) are views showing the state of the mobile phone according to the second embodiment of the present invention, FIG. 3 (A) is a view of the mobile phone as viewed from the front, and FIG. FIG. 10 is a diagram showing a state in which the second casing 11b in which the liquid crystal display unit 24 is arranged in the mobile phone is rotated 90 degrees, and (C) is a second case in which the liquid crystal display unit 24 is arranged in the mobile phone. It is a figure which shows a mode that the body 11b was rotated only 180 degree | times from the reference position shown to (A). FIG. 3B is a diagram corresponding to FIG. 3A, and FIG. 3B is a diagram illustrating an antenna arrangement example different from FIG. 3A. FIGS. 4A to 4C are diagrams showing the configuration of the mobile phone according to the third embodiment of the present invention, and FIG. 4A is a view of the mobile phone as viewed from the front. 4 (B) is a diagram showing a state when the second casing 31b in which the liquid crystal display unit is arranged in the mobile phone is rotated 90 degrees, and FIG. 4 (C) is a view of the mobile phone from the rear. It is a figure which shows a mode. FIG. 5A is a diagram illustrating a mobile phone viewed from the right side. FIG. 5B is a diagram illustrating a case where the first casing 31a and the second casing 31b are closed and the whip antenna is accommodated. FIG. 5C is a view of the above state viewed from the right side, and FIG. 5C is such that the angle at which the horizontal line in the longitudinal direction of the first casing 31a and the horizontal line in the longitudinal direction of the second casing 31b intersect each other is 120 degrees. It is a figure which shows a mode that the state which opened the mobile telephone was seen from the right side. 6A (A) and (B) are diagrams showing a mobile phone according to a fourth embodiment of the present invention, (A) is a view of the mobile phone as viewed from the front, and (B) is (A) It is a figure which shows the state which rotated the 2nd housing | casing 41b 90 degree | times from the state of (). 6B is a diagram corresponding to FIG. 6A, and as shown in FIG. 6B (B), when the second casing 41b is rotated 90 degrees, the left and right are asymmetric with respect to the first casing 41a. In particular, the internal antenna 46 and the whip antenna 45 are asymmetrical so that the distance between them is increased. FIGS. 7A to 7C are diagrams showing the mobile phone according to the present embodiment, and are views of the transition from FIG. 6A (A) to FIG. 6A (B) as seen from the back. FIGS. 8A and 8B are views showing a mobile phone according to the fifth embodiment of the present invention. FIG. 8A is a view of the mobile phone as viewed from the front, and FIG. ) Is a diagram showing a state when the second casing 51b in which the liquid crystal display unit 54 is arranged is rotated 90 degrees in the mobile phone. FIGS. 9A and 9B are diagrams showing a mobile phone according to the present embodiment, FIG. 9A is a view of the mobile phone viewed from the right side, and FIG. 9B is a first housing 51a and a second housing 51b. Is a view of the state in which the whip antenna 55 is stored as viewed from the right side. FIGS. 10A to 10C are views showing a mobile phone according to the sixth embodiment of the present invention, and FIG. 10A is a view of the mobile phone according to the present embodiment as viewed from the front. FIG. 10B is a view of a state in which the second housing 61b in which the liquid crystal display unit 64 is disposed in the mobile phone is rotated 90 degrees, as viewed from the back, and FIG. It is the figure which looked at the state which pulled out 66 from the back. FIGS. 11A and 11B are diagrams showing a mobile phone according to the seventh embodiment of the present invention, and the configuration of the mobile phone is a diagram corresponding to FIGS. 1A and 1B. . FIG. 12 is a block diagram illustrating details of diversity reception in FIG. 11, corresponding to FIG. 2. 13A and 13B are views showing a mobile phone according to an eighth embodiment of the present invention, and FIG. 13A is a view of the mobile phone according to the present embodiment as viewed from the front. FIG. 13B is a diagram showing a state in which the second casing 81b in which the liquid crystal display unit is arranged is rotated 90 degrees in the mobile phone according to the present embodiment. FIG. 14A is a diagram showing a cellular phone according to a ninth embodiment of the present invention, FIG. 14A is a diagram of the cellular phone according to the present embodiment as viewed from the front, and FIG. It is a figure which shows a mode that the 2nd housing | casing 11b in which the liquid crystal display part 24 is arrange | positioned in the mobile telephone by a form rotated 90 degree | times. It is a figure which shows the example which changed the rod-shaped shape of the internal antenna 26 in FIG. 14 (A) into the meander shape.

Explanation of symbols

11a, 21a, 31a, 41a, 51a, 61a, 81a: first housing
11b, 21b, 31b, 41b, 51b, 61b, 81b: second housing
11c, 31c, 41c: Third housing
12, 22, 32, 42, 52, 62, 82: Operation unit
14, 24, 34, 44, 54, 64, 84: LCD
15, 25, 35, 45, 55, 65: Whip antenna
16, 26, 36, 46, 56, 95: Built-in antenna
85: Sub antenna
86: Main antenna
66: Rod antenna
19: Control unit
110: Switching part
111: TV / Radio tuner
112: Gravity sensor
18, 88: Cellular antenna

Claims (15)

A mobile having a first housing, a second housing having a display portion, and a first rotating shaft that rotates the first housing and the second housing on substantially the same plane. In a portable terminal provided with a first antenna disposed in the first housing and a second antenna disposed in the second housing,
The receiving position is a stop position where the major axis direction of the first antenna and the major axis direction of the second antenna intersect due to relative rotation between the first casing and the second casing. A portable terminal characterized by that.   2. The mobile terminal according to claim 1, wherein the mobile terminal has a reception position in which the major axis direction of the first antenna and the major axis direction of the second antenna are substantially orthogonal to each other.   The mobile terminal according to claim 1, wherein diversity reception of content displayed on the display unit is performed at the reception position.   The said 1st rotating shaft connects the upper end part of the said 1st housing | casing, and the lower end part of the said 2nd housing | casing, The any one of Claim 1 to 3 characterized by the above-mentioned. Mobile device.   5. The apparatus according to claim 1, further comprising a reception switching unit that includes a third antenna and switches to diversity reception between the first antenna and the second antenna when the reception position is reached. The portable terminal of Claim 1.   A display size changing unit for changing a content display size displayed on the display unit, and a large content when a major axis direction of the first antenna and a major axis direction of the second antenna are substantially orthogonal to each other; The portable terminal according to any one of claims 1 to 5, wherein display is possible with a display size.   The portable terminal according to any one of claims 1 to 6, wherein at least one of the first antenna and the second antenna can be pulled out from a housing. A third housing;
A hinge part that foldably connects the first housing and the third housing;
A second rotating shaft for rotating the second casing and the third casing on substantially the same plane;
Diversity reception of content to be displayed on the display unit using the first antenna and the second antenna, and rotating the second casing, the major axis direction of the first antenna 8. The mobile terminal according to claim 1, wherein the mobile terminal has a reception position in which a major axis direction of the second antenna is substantially orthogonal to the second antenna.   9. The portable terminal according to claim 8, further comprising a slit provided in the third housing, the second rotation shaft being insertable.   10. The mobile terminal according to claim 8, further comprising a display size changing unit configured to change a content display size in the display unit, and displaying the content at a large content display size at the reception position.   The mobile terminal according to any one of claims 8 to 10, wherein at least one of the first antenna and the second antenna can be pulled out from a housing. At least two or more connecting the first casing, the second casing having a display unit, and the first casing and the second casing so as to be foldable and rotatable on substantially the same plane. In a portable terminal having a hinge portion having a rotation axis of
Content that is displayed on the display unit using a first antenna that is arranged in the first housing and has a long axis direction and a second antenna that is arranged in the second housing and has a long axis direction When the first housing and the second housing are relatively rotated, the major axis direction of the first antenna and the major axis direction of the second antenna are substantially the same. A portable terminal having orthogonal reception positions. A display size changing unit for changing a content display size in the display unit;
The mobile terminal according to claim 12, wherein when the major axis direction of the first antenna and the major axis direction of the second antenna are substantially orthogonal to each other, a large content display size is displayed.   The portable terminal according to claim 12 or 13, wherein at least one of the first antenna and the second antenna can be pulled out.   The mobile terminal according to claim 1, wherein the mobile terminal is a mobile phone with a digital broadcast receiving function.

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