JP2005341547A - Radio communications device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communications device with an antenna structure which can improve the transmission-reception sensitivities in all directions. <P>SOLUTION: An armor portion of a body portion 11 and speaker-receiving portions 12a, 12b consist of a front cabinet and a rear cabinet, and are fixed by a screw or the like, with a component housed in between both the cabinets. The body part 11 houses a component, such as a liquid crystal panel portion 13 and is electromagnetically shielded. The speaker-receiving portions 12a, 12b house speakers 14a, 14b and antennas 15a, 15b in the inside and are not electromagnetically shielded. The antennas 15a, 15b are arranged one by one so that the installation directions thereof are shifted 90 degrees to each other. The horizontal-plane directional pattern of one antenna of the antennas is stronger than that of the vertical-plane directional pattern, and the vertical-plane directional pattern of the other antenna is stronger than the horizontal-plane directional pattern. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wireless communication device, and is suitable for use in a portable type such as a liquid crystal television device, an EL television device, a PDP television device, and a CRT television device.

  In recent years, portable wireless communication devices such as liquid crystal television devices and CRT television devices have appeared. As such a wireless communication apparatus, an apparatus that transmits and receives a video signal using an SS (Spread Spectrum) wireless system compliant with IEEE 802.11 or IEEE 802.11B has been proposed. Such a wireless communication device is used not only for the wireless method described above, but also for a next-generation mobile phone device, PHS (Personal Handy-Phone System), or Blue Tooth whose data transfer speed is increased. Some have been proposed.

  By the way, in such a wireless system, a receiving antenna is required. In general, the antenna length of the antenna element for the frequency band of 2.4 GHz used in the SS radio system, the Blue Tooth radio system, and the like is about 3 cm corresponding to ¼ of the radio wavelength. The antenna length of 3 cm is significantly shorter than the antenna length in the antenna element for the VHF and UHF frequency bands, and an elongated shape such as a rod antenna is not necessary.

  However, although it is shortened, in a portable wireless communication device such as a small liquid crystal television device, the antenna element may become a protrusion that cannot be ignored.

  Patent Document 1 discloses a configuration in which an antenna element is built in a handle portion in a portable wireless transceiver. According to this, as shown in FIG. 5, the liquid crystal television device 50 has a configuration in which two antenna elements 53 a and 53 b are built in a handle portion 52 attached to a cabinet 51. The built-in antenna elements 53a and 53b are connected to the screws 54a and 54b at both ends of the handle portion 52 so that the built-in antenna elements 53a and 53b are in a parallel positional relationship with each other. To do.

According to this, it is possible to realize a portable liquid crystal television device having a neat structure without adding extra space to the liquid crystal television device 50 and without causing extra projections.
JP 2002-261646 A (published on September 13, 2002)

  However, the technology of Patent Document 1 realizes a portable liquid crystal television device with a neat structure without adding extra space to the liquid crystal television device 50 and without causing extra projections. However, unless the handle 52 is pulled out from the cabinet (display device main body) 51, the reception sensitivity to the radio wave transmitted from the front of the display screen is poor, and the antenna directivity is external. There is a problem that it is easy to change due to contact and is easily damaged.

  That is, in the technique of Patent Document 1, since the handle is provided with an antenna and the mounting position of the antenna is on the back side of the display unit that is electromagnetically shielded, the reception sensitivity of radio waves from the front side of the display unit is poor. More specifically, since the handle portion 52 including the antenna elements 53a and 53b is located on the back side of the cabinet 51 that is electromagnetically shielded, unless the handle portion 52 is pulled out above the cabinet 51 and used. The radio wave passing through the cabinet 51 from the front of the display screen is difficult to receive. In addition to the electromagnetic shield, the cabinet 51 includes a large number of reception radio wave shielding objects such as a liquid crystal panel, a wiring board, and internal structural parts, which also block radio waves from the entire screen, and receive sensitivity. Is further reduced.

  In addition, since the antenna is attached to the outside of the display device body, the direction of the antenna may be changed or damaged due to external contact or the like. That is, the antenna elements 53a and 53b are built in the handle portion 52 attached to the cabinet 51, and the length and orientation of the internal antenna elements 53a and 53b are adjusted by adjusting the pull-out amount and angle of the handle portion 52. It is supposed to be. Therefore, if something touches the handle portion 52, the directionality of the antenna elements 53a and 53b is changed, and if it is severe, the antenna elements 53a and 53b are damaged. In other words, damage to the handle portion 52 results in damage to the antenna. In the case of a portable liquid crystal television device or the like, because it is used in various places due to its characteristics, there is a high possibility that something will come into contact with the handle 52 compared to a fixed television device or the like. The risk of damage is also high.

  Further, in order to eliminate the directivity by arranging the antennas in multiple directions, it is necessary to provide a space for arranging the antennas, and it is difficult to secure the space in the configuration in which the antennas are accommodated in the handle as in Patent Document 1, and therefore, the liquid crystal television apparatus It can also be arranged inside. However, the internal arrangement is disadvantageous for receiving radio waves because it is covered with an electromagnetic shield such as unnecessary radiation. Further, as described above, there are a lot of reception radio wave shields (liquid crystal panels, wiring boards, internal structural components, etc.) in addition to the electromagnetic shield as described above, and the reception sensitivity is lowered. There was a problem that. Therefore, it has been difficult to arrange the antenna inside the apparatus.

  The present invention has been made in view of the above problems, and an object thereof is to provide a wireless communication apparatus having an antenna structure capable of improving the communication sensitivity of an antenna while suppressing the influence of an electromagnetic shield. In other words, it is an object to provide a wireless communication apparatus having an antenna structure that has good communication sensitivity and that does not change or break the antenna directivity due to external contact.

  In order to solve the above-described problems, a wireless communication device of the present invention is formed integrally with the device main body and an electromagnetic shield on the outer periphery of the display screen of the device main body containing a display unit having a display screen. An antenna housing portion that is not provided is provided, an antenna is disposed in the antenna housing portion, and the mounting directions of the antennas disposed in different antenna housing portions are different from each other by 90 degrees, and one antenna is disposed in the speaker housing portion. In this state, one of the antennas is characterized in that the horizontal plane directivity is stronger than the vertical plane directivity, and the other antenna is characterized in that the vertical plane directivity is stronger than the horizontal plane directivity.

  According to the above configuration, the antenna is formed integrally with the device main body on the display screen outer periphery of the device main body containing the display unit having the display screen, and is not provided with an electromagnetic shield. Since the antenna is arranged, the antenna can receive radio waves without being affected by the electromagnetic shield applied to the display portion, and communication sensitivity including radio waves from the front of the screen can be improved. In addition, since the antenna housing is provided at the outer periphery of the display screen, it is not affected by electromagnetic shielding, but there are few radio wave shields on the display, circuit board, and other parts, and communication sensitivity is also good in that respect. It becomes.

  Moreover, since the antenna is arranged in the antenna housing unit formed integrally with the apparatus main body, the directionality of the antenna does not change or break due to external contact, and Compared to the case of storing in the handle as in the prior art, the storage space can be ensured, so that the antenna can be arranged so as not to have directivity.

  In addition, the mounting directions of the two antennas arranged in the same or different antenna housing portions are 90 degrees different from each other, and one antenna is placed in the speaker housing portion one by one with horizontal plane directivity characteristics. Since the other antenna has a directional characteristic stronger than the vertical directional characteristic and the vertical directional characteristic is stronger than the horizontal directional characteristic, the communication sensitivity can be improved.

  In order to solve the above-described problem, another wireless communication device of the present invention is formed integrally with the device main body on the outer peripheral portion of the display screen of the device main body containing the display unit having the display screen. An antenna housing portion having a ventilation portion composed of a through hole is provided, an antenna is disposed in the antenna housing portion, and the mounting directions of the antennas disposed in the different antenna housing portions are different from each other by 90 degrees, and the inside of the speaker housing portion is One antenna has a horizontal plane directivity stronger than the vertical plane directivity, and the other antenna has a vertical plane stronger directivity than the horizontal plane directivity. Yes.

  According to the above configuration, the antenna is an antenna having a ventilation portion formed integrally with the device main body portion and formed of a plurality of through holes on the outer peripheral portion of the display screen of the device main body that houses the display portion having the display screen. Since the antenna is arranged in the storage unit, the antenna can receive radio waves without being affected by the electromagnetic shield applied to the display unit, and communication sensitivity can be improved including radio waves from the front of the screen. In addition, since the antenna housing is provided at the outer periphery of the display screen, it is not affected by electromagnetic shielding, but there are few radio wave shields on the display, circuit board, and other parts, and communication sensitivity is also good in that respect. It becomes.

  Moreover, since the antenna is arranged in the antenna housing unit formed integrally with the apparatus main body, the directionality of the antenna does not change or break due to external contact, and Compared to the case of storing in the handle as in the prior art, the storage space can be ensured, so that the antenna can be arranged so as not to have directivity.

  In addition, the mounting directions of the two antennas arranged in the same or different antenna housing portions are 90 degrees different from each other, and one antenna is placed in the speaker housing portion one by one with horizontal plane directivity characteristics. Since the other antenna has a directional characteristic stronger than the vertical directional characteristic and the vertical directional characteristic is stronger than the horizontal directional characteristic, the communication sensitivity can be improved.

  Here, in each of the wireless communication devices, the number of antennas arranged in one antenna housing unit may be one or plural, and the number of antenna housing units may be plural. For example, it is good also as a structure provided in the both right and left sides of the said display screen.

  Further, in each of the wireless communication devices, in addition to the above configuration, the antenna storage unit may be provided on both the left and right sides of the display screen. In that case, the antenna storage unit may be a speaker storage unit. It is also possible to adopt a configuration in which an antenna and a speaker are housed inside each of them.

  By using the antenna storage part also as a speaker storage part for storing a speaker, it is not necessary to add a special space to the wireless communication device for storing the antenna, and the antenna storage part and the outer peripheral part of the display screen The design can be improved as compared with the configuration in which the speaker storage unit is individually provided.

  Further, in each of the wireless communication devices, in addition to the above-described configuration, a plurality of antennas arranged in the same or different antenna storage unit can also be configured as a diversity antenna, and the diversity antenna effect It becomes possible to cope with. As the antenna, an inverted L antenna or an inverted F antenna can be used.

  As described above, the wireless communication device of the present invention is formed integrally with the device main body portion and provided with an electromagnetic shield on the outer peripheral portion of the display screen of the device main body containing the display portion having the display screen. There is no antenna storage section, antennas are disposed in the antenna storage sections, and the mounting directions of the antennas disposed in different antenna storage sections are 90 degrees different from each other, and one antenna is disposed in the speaker storage section. Thus, one of the antennas is characterized in that the horizontal plane directivity is stronger than the vertical plane directivity, and the other antenna is characterized in that the vertical plane directivity is stronger than the horizontal plane directivity.

  Accordingly, it is possible to provide a wireless communication apparatus having an antenna structure that can improve the communication sensitivity of the antenna while suppressing the influence of the electromagnetic shield. In other words, the communication sensitivity is good and the antenna directivity is high. There is an effect that it is possible to provide a wireless communication apparatus having an antenna structure that does not change or break due to external contact.

  As described above, another wireless communication device of the present invention is formed integrally with the device main body portion on the outer peripheral portion of the device main body containing the display portion having the display screen, and has a plurality of through holes. An antenna housing portion having a ventilation portion is provided, the antenna is disposed in the antenna housing portion, and the mounting directions of the antennas disposed in different antenna housing portions are different from each other by 90 degrees, and one antenna housing portion is provided in the speaker housing portion. One antenna is characterized in that the horizontal plane directivity is stronger than the vertical plane directivity, and the other antenna is characterized in that the vertical plane directivity is stronger than the horizontal plane directivity.

  Accordingly, it is possible to provide a wireless communication apparatus having an antenna structure that can improve the communication sensitivity of the antenna while suppressing the influence of the electromagnetic shield. In other words, the communication sensitivity is good and the antenna directivity is high. There is an effect that it is possible to provide a wireless communication apparatus having an antenna structure that does not change or break due to external contact.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  First, an example of a usage environment in which a liquid crystal television device (wireless communication device) according to an embodiment of the present invention is arranged will be described with reference to FIG.

  FIG. 6 is an explanatory diagram showing an outline of the wireless AV system 1 which is a display-separated type wireless TV receiver. As shown in FIG. 6, a wireless AV system 1 includes a wireless center unit (hereinafter referred to as a wireless center) 2 as a base device and a television (TV) main unit (hereinafter referred to as a TV main body) as a portable terminal (wireless terminal). 3), and the wireless center 2 and the TV body 3 (wireless communication device) are paired to form a wireless transmission network.

  As shown in FIG. 6, the TV body 3 is wireless with a built-in battery. In addition, a remote controller 4 is provided so that a remote control such as a video deck can be operated. The wireless center 2 is connected to an antenna such as a BS or U / V, or an AV device such as a DVD player or a video deck. Then, video and / or audio data is wirelessly transmitted from the wireless center 2 to the TV body 3.

  The TV main body 3 is a thin display device that is separable from the wireless center 2 and can be carried or carried with a built-in battery. For example, a variety of liquid crystal televisions (hereinafter referred to as liquid crystal televisions), inorganic EL / organic EL displays, plasma displays, and the like. The display device is a wide concept including the display device and is not limited by the display mechanism. The TV main body 3 according to the present embodiment will be described using a liquid crystal television as an example of a thin display device.

  FIG. 1 is a front view showing a liquid crystal television apparatus having a radio communication apparatus antenna structure according to the present invention, FIG. 2 is a perspective view showing the structure of the antenna, and FIG. 3 is an exploded perspective view of this liquid crystal television apparatus. FIG.

  As shown in FIG. 1, the liquid crystal television device 10 includes a main body 11 in which components such as a liquid crystal panel (display) 13 are stored, and semicircular speakers arranged on both left and right sides of the main body 11. A storage unit (antenna storage unit / speaker storage unit) 12a, 12b is provided, which are integrally formed.

  As shown in FIG. 3, the exterior portion of the main body 11 and the speaker storage portions 12 a and 12 b includes a front cabinet 23 and a rear cabinet 24. In the front cabinet 23, the front exterior parts of the main body 11 and the speaker storage parts 12a and 12b are integrally formed. The rear cabinet 24 is integrally formed with the rear exterior portions of the main body 11 and the speaker storage portions 12a and 12b. The front cabinet 23 and the rear cabinet 24 have a structure in which components are accommodated between the front cabinet 23 and the rear cabinet 24 and the cabinets 23 and 24 are fixed with screws or the like.

  As described above, the main body part 11 accommodates components such as the liquid crystal panel part 13, and the main body part 11 is provided with an electromagnetic shield so that an electromagnetic wave exceeding a certain standard does not leak to the outside.

  On the other hand, sound emitting holes 16a and 16b, which are through-holes, are formed in the speaker storage portions 12a and 12b (on the outer surface), and the speakers 14a and 14b and the antennas 15a and 15b are provided inside. I have. The speaker storage units 12a and 12b are not electromagnetically shielded.

  Further, a heat radiating hole 17 that is a through-hole to the inside is formed on the display surface side of the main body 11 to release heat inside the main body 11. The sound emitting holes 16a and 16b and the heat radiating hole 17 are all ventilation portions for ventilating the inside of the apparatus. Since the region where the heat dissipation hole 17 is formed in the main body 11 is the outer peripheral portion of the liquid panel portion 13 and outside the end of the display screen, the electromagnetic shield is similar to the speaker storage portions 12a and 12b. Not given.

  Thus, the antennas 15a and 15b are arranged in the speaker storage units 12a and 12b, which are non-electromagnetic shield units. The speaker storage units 12a and 12b are located on the outer side of the display screen of the display unit 13 and are located away from the display unit 13 which is an electromagnetic shield unit. Therefore, the antennas 15a and 15b arranged in the speaker storage units 12a and 12b can maintain good transmission / reception sensitivity (communication sensitivity).

  Here, the outward side of the display screen of the display unit 13 is any direction indicated by an arrow in FIG. 1 and means the outside of the end of the display screen of the display unit 13. That is, in the figure, the outer region indicated by the right-pointing arrows a and a from the right end portion of the display screen indicated by the broken line L1, the outer region indicated by the right-pointing arrows b and b from the upper end portion of the display screen indicated by the broken line L2, and the broken line L3 is an outer region indicated by left arrows c and c from the left end portion of the display screen indicated by L3, an outer region indicated by downward arrows a and a from the lower end portion of the display screen indicated by a broken line L4, and an outer peripheral portion of the display screen That is.

  FIG. 2 is a perspective view showing the structure of the antennas arranged as the antennas 15 a and 15 b, where (a) is the inverted L-type antenna 15, and (b) is the inverted F-type antenna 26. The inverted L-type antenna 15 includes a rectangular antenna substrate 21 and an antenna element portion 22 made of a side-side inverted L-shaped metal plate. On the other hand, the inverted F-type antenna 26 includes a rectangular antenna substrate 27 and an antenna element portion 28 made of a metal plate having an inverted side F shape. Either type of antenna may be used as the antennas 15a and 15b, but in the present embodiment, the inverted L-type antenna 15 is used.

  In the example of FIGS. 1 and 3, the antennas 15a and 15b are arranged so that their mounting directions are different from each other by 90 degrees. Here, the antennas 15a and 15b are arranged above the speakers 14a and 14b. By mounting in this manner, one antenna 15a has a horizontal plane directivity stronger than the vertical plane directivity, and the other antenna 15b has a vertical plane directivity in a state where one antenna is disposed in each of the speaker storage portions 12a and 12b. Has a directional characteristic stronger than the horizontal plane directional characteristic. Note that, depending on the usage environment, the antennas 15a and 15b may be attached in the same direction in a state where one speaker storage unit 12a and 12b are arranged in the speaker storage units 12a and 12b.

  The antenna element portion 22 is electrically connected to the wireless transmission / reception circuit in the main body portion 11. The two antennas 15a and 15b function as diversity antennas.

  FIG. 4 is a block diagram showing the wireless transmission / reception circuit 30. The radio transmission / reception circuit unit 30 includes a transmission circuit unit 31 that transmits a radio signal, a reception circuit unit 32 that receives a radio signal, and a bandpass filter for transmitting and receiving only the frequency band of the radio signal to the antennas 15a and 15b. BPF) 34, and a diversity switch 33 for switching the transmission circuit unit 31 and the reception circuit unit 32 over time to connect to the BPF 34, and diversity for switching over the antennas 15 a and 15 b over time to connect to the BPF 34. A switch 35 is provided. The diversity switch 35 is a time-division switch for connecting the radio transmission / reception circuit unit 30 to the antennas 15a and 15b constituting the diversity antenna by switching over time by, for example, a microcomputer (not shown).

  With such a connection configuration, the radio signal input / output to / from the radio transmission / reception circuit unit 30 passes only the frequency band of the radio signal to be used by the BPF 34 and causes the antennas 15a and 15b to function as a diversity antenna.

  As described above, in the liquid crystal television device 10 according to the present embodiment, the antennas 15a and 15b are provided outside the main body 11 covered with the electromagnetic shield and are not covered with the electromagnetic shield. Since it is accommodated in the parts 12a and 12b, it is advantageous in terms of transmission / reception sensitivity. In addition, the speaker storage portions 12a and 12b have few radio wave shielding objects such as a liquid crystal panel, a substrate, and other components, which is advantageous in terms of transmission / reception sensitivity. Moreover, since it is accommodated in the speaker storage parts 12a and 12b, the directivity of the antenna does not change or break due to external contact. Furthermore, as compared with the case of storing in the handle as in the prior art, the storage space can be secured, the mounting directions of the antennas 15a and 15b can be different from each other by 90 degrees, and the transmission / reception sensitivity can be improved in all directions. There is also.

  In the present embodiment, the antennas 15a and 15b are accommodated in the speaker storage portions 12a and 12b that are provided outside the main body 11 covered with the electromagnetic shield and are not covered with the electromagnetic shield. However, if there is no problem even if an electromagnetic shield is not provided, the antenna can be arranged with good communication sensitivity if it is the outer peripheral portion of the display screen indicated by broken lines Ll to L4 and arrows a to d in FIG.

  Therefore, an antenna housing portion that is not provided with an electromagnetic shield is formed integrally with the main body portion 11 on the outer peripheral portion of the display screen, and the antennas 15a and 15b are housed therein, so that the communication sensitivity is good, A sufficient arrangement space can be secured to improve transmission / reception sensitivity in all directions, and an antenna structure in which the directivity of the antenna does not change or break due to external contact can be obtained. For example, the region where the heat radiating hole 17 is formed at the lower portion of the main body 11 shown in FIG. 1 is the outer peripheral portion of the liquid panel portion 13 and outside the end portion of the display screen, so the speaker storage portions 12a and 12b. Similarly to the above, since the electromagnetic shield is not provided, it is possible to arrange the antennas 15a and 15b in this portion.

  However, like the liquid crystal television device 10 according to the present embodiment, the antenna storage portion is also used as the speaker storage portions 12a and 12b for storing the speakers 14a and 14b, so that the antenna storage portion is special for storing the antenna. It is not necessary to add a space to the wireless communication device, and the design can be improved as compared with the configuration in which the antenna storage portion is provided separately from the speaker storage portions 12a and 12b on the outer periphery of the display screen.

  In the present embodiment, one antenna is disposed in each of the left and right speaker storage units 12a and 12b. However, the antenna is disposed in the speaker storage units 12a and 12b according to the received radio wave intensity and the viewing environment of the liquid crystal television device 10. There may be a plurality of antennas (arranged in the antenna housing portion), and the number of antenna housing portions to be provided may be one or plural. When two antennas are arranged in each of the left and right speaker storage units, for example, if the two antennas on the left and right sides are set to be 90 degrees different from each other, when the wireless communication device is used as a portable type, Since the degree of freedom of usage that is not limited to the installation position and installation direction is increased, the usability can be further improved.

  In this embodiment, the antenna is arranged in a direction different by 90 degrees so as not to be limited to the type of polarization plane of the incoming radio wave. However, the present invention is not limited to this, and transmission / reception sensitivity increases in all directions. Thus, the attachment direction may be determined. The antenna may be installed in the same direction. In this case, the space of the installation width (depth) of the antenna can be suppressed, and it is used for thin equipment such as a liquid crystal television without impairing the characteristic of being thin. it can.

  Furthermore, in the present embodiment, two antennas are arranged as the antennas 15a and 15b. However, one antenna may be arranged, and in that case, the number of antenna storage portions provided is naturally one.

  In this embodiment, the example in which the liquid crystal television device is mounted has been described. However, the mounted device is not limited to this, and for example, an EL television device, a PDP television device, a CRT television device, It can be suitably used for portable devices such as mobile phones and mobile terminal devices.

  In other words, the present invention can also be expressed as follows. That is, the present invention is characterized in that a non-electromagnetic shield portion is provided on each side outside the display screen in the main body having a display screen for displaying an image, and an antenna is disposed inside each non-electromagnetic shield portion. Is a wireless communication device (first wireless communication device).

  Further, the present invention is characterized in that a ventilation portion including a plurality of through holes is provided outside the display screen in the main body having a display screen for displaying an image, and an antenna is disposed inside each of the ventilation portions. A wireless communication device (second wireless communication device).

  Further, according to the present invention, in the first and second wireless communication devices, speaker storage portions are further disposed on both the left and right sides of the display screen, and the antenna is disposed in each of the speaker storage portions. It can also be a feature (third wireless communication device).

  In the third wireless communication apparatus, the antennas may be further arranged one by one in the speaker housing portion, and each mounting direction may be different by 90 degrees.

  Similarly, in the third wireless communication apparatus, one antenna is disposed in the speaker housing portion, the mounting directions are different by 90 degrees, and one antenna is disposed in the speaker housing portion. One antenna may have a horizontal plane directivity stronger than a vertical plane directivity, and the other antenna may have a vertical plane stronger than the horizontal plane directivity. .

  And in the said 1st-3rd radio | wireless communication apparatus, the said antenna is an inverted L type or an inverted F type antenna at least, and it is any one of the combination of the same antenna, and a different combination on the both right and left sides of the said main-body part. It can also be characterized by being arranged in two combinations.

  In the third wireless communication apparatus, the antenna may be provided so as to protrude from the speaker mounting flat portion in the speaker housing portion. Here, the speaker mounting plane portion in FIG. 1 is a surface parallel to the opening surface of the speaker in the speaker storage portions 12a and 12b to which the speakers 14a and 14b are attached. A surface parallel to the surface. With such a configuration, even when a small plate-like planar antenna is attached to a place where the space of the attachment housing portion is limited, radio wave reception sensitivity can be improved.

  Furthermore, in the first to third wireless communication apparatuses, the antenna may be a diversity antenna.

  As described above, according to the present invention, the antenna is arranged by providing the non-electromagnetic shield part on the outer side of the display screen of the main body part, or the ventilation part is provided on the outer side of the display screen of the main body part. Since it is arranged, it is possible to improve the communication sensitivity of the antenna without being affected by the electromagnetic shield. Further, since the antenna is not exposed to the outside of the display device main body, the problem that the direction of the antenna is changed or damaged due to external contact or the like can be improved.

  Further, the wireless communication device of the present invention is an antenna housing that is integrally formed with the device main body portion and is not electromagnetically shielded on the outer peripheral portion of the device main body housing the display portion having a display screen. And an antenna is arranged in the antenna housing portion.

  According to the above configuration, the antenna is formed integrally with the device main body on the display screen outer periphery of the device main body containing the display unit having the display screen, and is not provided with an electromagnetic shield. Since the antenna is arranged, the antenna can receive radio waves without being affected by the electromagnetic shield applied to the display portion, and communication sensitivity including radio waves from the front of the screen can be improved. In addition, since the antenna housing is provided at the outer periphery of the display screen, it is not affected by electromagnetic shielding, but there are few radio wave shields on the display, circuit board, and other parts, and communication sensitivity is also good in that respect. It becomes.

  Moreover, since the antenna is arranged in the antenna housing unit formed integrally with the apparatus main body, the directionality of the antenna does not change or break due to external contact, and Compared to the case of storing in the handle as in the prior art, the storage space can be ensured, so that the antenna can be arranged so as not to have directivity.

  Another wireless communication device of the present invention is formed integrally with the device main body at the outer peripheral portion of the display main body of the device main body containing the display unit having the display screen, and has a ventilation portion including a plurality of through holes. The antenna housing portion is provided, and the antenna is disposed in the antenna housing portion.

  According to the above configuration, the antenna is an antenna having a ventilation portion formed integrally with the device main body portion and formed of a plurality of through holes on the outer peripheral portion of the display screen of the device main body that houses the display portion having the display screen. Since the antenna is arranged in the storage unit, the antenna can receive radio waves without being affected by the electromagnetic shield applied to the display unit, and communication sensitivity can be improved including radio waves from the front of the screen. In addition, since the antenna housing is provided at the outer periphery of the display screen, it is not affected by electromagnetic shielding, but there are few radio wave shields on the display, circuit board, and other parts, and communication sensitivity is also good in that respect. It becomes.

  Moreover, since the antenna is arranged in the antenna housing unit formed integrally with the apparatus main body, the directionality of the antenna does not change or break due to external contact, and Compared to the case of storing in the handle as in the prior art, the storage space can be ensured, so that the antenna can be arranged so as not to have directivity.

  Here, in each of the wireless communication devices, the number of antennas arranged in one antenna housing unit may be one or plural, and the number of antenna housing units may be plural. For example, it is good also as a structure provided in the both right and left sides of the said display screen.

  In each of the wireless communication devices, in addition to the above configuration, the antenna storage unit is provided on both the left and right sides of the display screen and also serves as a speaker storage unit. The antenna and the speaker are stored in each of the wireless communication devices. It can also be set as the structure currently made.

  By using the antenna storage part also as a speaker storage part for storing a speaker, it is not necessary to add a special space to the wireless communication device for storing the antenna, and the antenna storage part and the outer peripheral part of the display screen The design can be improved as compared with the configuration in which the speaker storage unit is individually provided.

  In addition to the above-described configuration, each of the wireless communication devices may have a configuration in which the mounting directions of the two antennas arranged in the same or different antenna storage portions are different from each other by 90 degrees.

  With such a configuration, in the state where one antenna is arranged in the speaker storage unit, one of the antennas has a higher horizontal plane directivity than a vertical plane directivity, and the other antenna has a vertical plane directivity. Since the directional characteristic is stronger than the horizontal directional characteristic, the communication sensitivity can be improved.

  Further, in each of the wireless communication devices, in addition to the above-described configuration, a plurality of antennas arranged in the same or different antenna storage unit can also be configured as a diversity antenna, and the diversity antenna effect It becomes possible to cope with. As the antenna, an inverted L antenna or an inverted F antenna can be used.

  The present invention can be preferably applied to portable devices such as liquid crystal television devices, EL television devices, PDP television devices, CRT television devices, mobile phones, and mobile terminal devices.

It is a front view which shows the liquid crystal television apparatus which has the antenna structure of the radio | wireless communication apparatus which concerns on this invention. It is a perspective view which shows the structure of an antenna, (a) is an inverted L type antenna, (b) is a figure which shows an inverted F type antenna. It is a disassembled perspective view of a liquid crystal television apparatus. It is a block diagram which shows a radio | wireless transmission / reception circuit. It is a rear view which shows the antenna structure of the conventional liquid crystal television apparatus. It is explanatory drawing which showed the outline of the wireless AV system with which the liquid crystal television apparatus shown in FIG. 1 is distribute | arranged as a television main body unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Liquid crystal television apparatus 11 Main-body part 12a, 12b Speaker storage part (speaker storage part, antenna storage part)
13 Liquid crystal panels 14a and 14b Speakers 15a and 15b Antennas 21 and 27 Antenna substrates 22 and 28 Antenna element unit 23 Front cabinet 24 Rear cabinet 30 Radio transmission / reception circuit unit 31 Transmission circuit unit 32 Reception circuit unit 33 Changeover switch 34 Bandpass filter 35 Diversity switch

Claims (5)

  An antenna housing portion that is integrally formed with the device body portion and is not electromagnetically shielded is provided on the outer periphery of the display body of the device body housing the display portion having a display screen. The antennas are arranged, and the mounting directions of the antennas arranged in different antenna housing parts are different from each other by 90 degrees, and one antenna is placed in the antenna housing part in a state where the horizontal plane directivity is a vertical plane A wireless communication apparatus characterized in that the antenna has a directional characteristic stronger than the directional characteristic and the other antenna has a vertical directional characteristic stronger than a horizontal directional characteristic.   An antenna housing portion that is formed integrally with the device main body portion and has a ventilation portion that includes a plurality of through holes is provided on the outer periphery of the display screen of the device body that houses the display portion having a display screen. Antennas are arranged in the storage units, and the mounting directions of the antennas arranged in the different antenna storage units are 90 degrees different from each other, and one antenna is placed in the antenna storage unit, and one of the antennas has a horizontal plane directivity characteristic. A wireless communication device characterized in that is stronger than a vertical plane directivity and the other antenna has a directivity higher than a horizontal plane directivity.   The wireless communication apparatus according to claim 1, wherein the antenna storage unit is provided on both left and right sides of the display screen.   4. The wireless communication device according to any one of 1 to 3, wherein a plurality of antennas arranged in the same or different antenna housing portions constitute a diversity antenna.   The wireless communication apparatus according to claim 1, wherein the antenna is an inverted L antenna or an inverted F antenna.

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