JP3071278U - Antenna device for portable communication equipment - Google Patents

Abstract

(57) [Problem] To improve the light emission drive efficiency of a light emitting element with a simple configuration and to make the light emitting element emit light stably. SOLUTION: A voltage at a connection point between a linear antenna 106 and a helical antenna 201 is picked up by a resonance circuit including a coil 302 and a capacitor 303, rectified by a rectifier diode 301, and then lit by an LED 203.
Is supplied with a drive current, whereby the LED 203 emits light. At the same time, the driving power of the LED 203 is supplied by electromagnetic coupling with the helical antenna 201, and the LED 203 is also driven to emit light.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an antenna device for a portable communication device used for a portable communication device such as a mobile phone and a PHS (Personal Handyphone System).

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, a portable communication device such as a mobile phone and a PHS uses an antenna device for a portable communication device for transmitting and receiving radio waves. As a method of notifying that a call has arrived at the portable communication device, a method of audibly notifying by generating a ringtone has been widely adopted. However, the method of notifying by a ringtone sounds noise to surrounding people, so a method of visually notifying the incoming call by a light-emitting display instead of the ringtone is also adopted.

In a method of visually notifying an incoming call, a light-transmitting case member is attached to a tip of a linear antenna, and a light-emitting display circuit including a light-emitting diode and a driving circuit is provided in the case member. Is arranged. As shown in FIG. 5, the light-emitting display circuit includes a first rectifier diode 503 and a second rectifier diode 503, one ends of which are connected to an antenna unit composed of a linear antenna 501 and a coil antenna 502 so as to be in mutually opposite directions. And a light-emitting diode (LED) 505 connected between the other ends of the rectifier diode 503 and the rectifier diode 504. A current generated by the AC voltage obtained from the antenna unit is rectified by rectifier diodes 503 and 504, and the LED 505 is driven to emit light by using the rectified diodes as power sources. This allows the portable communication device to visually notify that there is an incoming call. Also, by connecting a plurality of LEDs in parallel, a variety of light-emitting displays using a mixture of these LEDs have been performed.

[0004]

[Problems to be solved by the invention]

 In the antenna device for a portable communication device having the above-described configuration, the current generated by the AC voltage of the antenna unit is merely rectified by the rectifier diodes 503 and 504 to drive the LED 505 to emit light. When the power generated in the antenna unit is small, there is a problem that the LED 505 does not emit light. In addition, since two rectifier diodes are used, there is a problem that the circuit configuration is complicated and the price is high. Further, when a plurality of LEDs are simply connected in parallel, there is a problem that the plurality of LEDs do not emit light at the same time due to a difference in the ON resistance (resistance when the LED emits light).

An object of the present invention is to improve the light emission driving efficiency of a light emitting element with a simple configuration and to stably emit light from the light emitting element. Another object of the present invention is to enable a plurality of LEDs to emit light at the same time to perform various displays.

[0006]

[Means for Solving the Problems]

 According to the present invention, there is provided an antenna unit, a case member having at least a part thereof having translucency and integrally formed with the antenna unit, and a light emitting element disposed in the case member. And a rectifier diode having one end connected to the antenna unit, and a rectifier diode having one end connected to the antenna unit, wherein the light emitting element emits light using electric power generated in the antenna unit as a power source. A capacitor and a coil connected in series with the antenna unit; and a light emitting element connected between a connection point of the capacitor and the coil and the other end of the rectifier diode. The present invention provides an antenna device for a portable communication device, characterized in that the antenna device forms a resonance circuit that resonates at least in the vicinity of the frequency of a used radio wave. A voltage generated in the antenna unit is picked up by a resonance circuit, and a current generated by the voltage is rectified by a rectifier diode, whereby the light emitting element is driven to emit light.

Here, the antenna unit may include a helical antenna, and the rectifier diode, the capacitor, and the coil may be arranged in an electromagnetic field generated by the helical antenna. As a result, driving power for driving the light emitting element is supplied from the helical antenna by electromagnetic coupling. Further, the rectifier diode, the capacitor, and the coil may be configured to be disposed in the helical antenna. Further, the light emitting element may be constituted by a plurality of light emitting diodes connected in series. Further, the light emitting element may be constituted by a plurality of light emitting diodes connected in parallel or in series / parallel, and the plurality of light emitting diodes connected in parallel may have an on-resistance equal to each other. Thereby, each light emitting diode emits light simultaneously.

[0008]

[Embodiment of the invention]

 FIG. 1 is a front view of an antenna device for a portable communication device according to a first embodiment of the present invention, and shows an example of an antenna device for a mobile phone applied to a mobile phone. FIG. 2 is a partially enlarged sectional view of FIG. 1, and the same parts as those in FIG. 1 are denoted by the same reference numerals. 1 and 2, the antenna device for a mobile phone according to the present embodiment includes an antenna body 101 formed in a linear shape and a case member 104 detachably attached to an upper end of the antenna body 101. Have.

The antenna main body 101 includes, for example, a linear antenna 106 formed of a shape memory alloy, and a tube member formed of a light-transmitting member (for example, a light-transmitting resin) in a cylindrical shape and covering the linear antenna 106. 107, a conductive upper contact portion 105 formed integrally with the linear antenna 106, and a conductive lower contact portion 110 formed integrally with the linear antenna 106. The linear antenna 106 is colored, and is configured to be covered with the tube member 107 so as to prevent peeling of the coloring and generation of scratches.

The upper contact portion 105 is configured to be electrically connected to a power supply circuit (not shown) of the mobile phone via the fixing member 108 when the antenna main body 101 is stored in the mobile phone (not shown). The lower contact portion 110 is configured to be electrically connected to a power supply circuit of the mobile phone via the fixing member 108 when the antenna main body 101 is pulled out from the mobile phone and protruded. The fixing member 108 is formed of a conductive material, and has a through hole (not shown) and a screw portion 109. The fixing member 108 has the linear antenna 106 and the tube member 107 inserted through the through-holes, and is screwed into the mobile phone with the screw portion 109 to attach the antenna main body 101 to the mobile phone so as to be able to come and go. The through hole is configured to fit into the upper contact portion 105 and the lower contact portion 110.

The case member 104 has a rounded upper portion and is formed in a substantially cylindrical shape as a whole. The case member 104 is attached to the upper end of the upper contact portion 105 of the antenna main body 101 and at least a part thereof has light transmittance. In the present embodiment, the light-transmitting member is formed of a member, for example, a light-transmitting resin such as a transparent resin, a light-transmitting resin, or a light-transmitting resin mixed with a light storage agent. And a case bottom 103 made of a non-translucent conductive metal. A screw portion 206 is formed on the lower outer peripheral surface of the case top portion 102 and the inner peripheral surface of the case bottom portion 103, respectively, and these are integrated by screwing them together. Thus, the case top 102 can be replaced (for example, it can be replaced with a case having a different color).

A through hole having a screw portion 207 formed on the inner peripheral surface is provided at the center of the bottom of the case bottom portion 103, and a screw portion 207 is also formed on the upper outer peripheral surface of the upper contact portion 105. The case member 104 is detachably attached to the upper contact portion 105 by screwing the two screw portions 207 together. As a result, the case member 104 is detachably attached to the antenna main body 101, and is replaceable together with the light emitting display circuit provided in the case member 104. Here, the screw portion 207 formed on the case bottom portion 103 and the upper contact portion 105 constitutes an attachment member for detachably attaching the case member 104 to the antenna main body portion 101, and also constitutes a screw member.

With such a configuration, the case member 104 can be replaced (for example, a case member having a different color or a case member having an LED that emits a different color can be replaced). . In addition, as an attachment member for detachably attaching the case member 104 to the antenna main body 101, a convex portion is formed on one of the case member 104 and the antenna main body portion 101, and a concave portion fitted with the convex portion is formed on the other. And the case member 104 may be detachably attached to the antenna body 101. In this case, the protrusions and the recesses form a mounting member, and also form a fitting member.

On the other hand, as shown in FIG. 2, a helical antenna 201 which functions as an antenna and also functions as a spring member, a conductive pedestal 205, and a fixing means such as soldering or caulking are attached to the case member 104. A circuit board 202 is provided which is fixed and electrically connected to the circuit board 202. The helical antenna 201 and the linear antenna 106 constitute an antenna unit. The pedestal 205 is electrically connected to the upper contact portion 105 of the antenna body 101 via the case bottom 103 and the screw portion 207, and is also directly connected to the upper contact portion 105 of the antenna body 101. I have. It should be noted that the pedestal 205 is held in a state of being placed in the case bottom 103, and the electrical connection between the pedestal 205 and the upper contact portion 105 is made by the urging force of the helical antenna 201 as described later. Therefore, it is configured to be surely realized.

A light emitting diode (LED) 203 as a light emitting element and a drive circuit 204 for driving the LED 203 to emit light are fixed to the circuit board 202 by soldering. The drive circuit 204 includes a rectifier diode, a capacitor, and a coil, as described later, and is connected by a wiring pattern formed on the circuit board 202. The drive circuit 204 and the LED 203 constitute a light emitting display circuit. One (upper) of the helical antenna 201 abuts the inner wall of the case top 102 and the other (lower) abuts the pedestal 205, and the pedestal 205 is urged downward by the extension force of the helical antenna 201, As a result, the pedestal 205 is in contact with the case bottom 103 and the upper contact 105.

With the above configuration, the helical antenna 201, the pedestal 205, the antenna main body 101, and the light emitting display circuit of the circuit board 202 are electrically connected. Note that the circuit board 202 is provided in the helical antenna 201, whereby the drive circuit 204 and the LED 203 formed on the circuit board 202 are provided in the helical antenna 201. When the mobile phone transmits a radio wave, the one end of the helical antenna 201 is set at a point where the maximum voltage is reached, and the base 205 is connected to an intermediate point between the maximum voltage point and the minimum voltage point. I have.

When assembling the antenna device for a mobile phone configured as described above, the upper contact portion 105 and the lower contact portion 110 are caulked while the linear antenna 106 is inserted into the tube member 107. The antenna main body 101 is formed by attaching to the linear antenna 106 by the above method. Thus, the antenna main body 101 in which the linear antenna 106 is covered with the tube member 107 is completed. Next, after the circuit board 202 on which the LED 203 and the drive circuit 204 are soldered to the wiring pattern is integrally mounted on the pedestal 205 by soldering, caulking, or the like, the pedestal 205 is placed in the case bottom 103. At this time, the donut-shaped lowermost surface of the pedestal 205 contacts the case bottom 103. Next, the helical antenna 201 is placed on the pedestal 205 and the screw portion 206 is screwed together, so that the case top portion 102 and the case bottom portion 103 are integrally assembled. Assembling of the antenna head housing the display circuit is completed.

At this time, the helical antenna 201 is pressed by the inner wall of the case top 102 and is compressed to generate an elongation, whereby the pedestal 205 is fixed in a state pressed against the case bottom 103. Therefore, the helical antenna 201 and the light emitting display circuit are electrically connected via the pedestal 205. Further, the circuit board 202 is provided in the helical antenna 201, whereby the light emitting display circuit formed on the circuit board 202 is provided in a state of being completely accommodated in the helical antenna 201.

Thereafter, the case member 104 is attached to the antenna main body 101 by screwing the screw part 207 of the case bottom part 103 and the screw part 207 of the upper contact part 105. At this time, the pedestal 205 is electrically connected directly to the upper contact portion 105 by pressing the recess formed in the lower center of the pedestal 205 directly into the upper contact portion 105 by the urging force of the helical antenna 201. , And is electrically connected to the upper contact portion 105 via the case bottom 103. Thereby, the antenna device for a portable communication device according to the present embodiment is completed.

As described above, the helical antenna 201 and the light-emitting display circuit can be electrically connected to the antenna main body 101 without using a special mounting device and without performing a lot of complicated soldering work. It is possible to connect to the device, the configuration is simple, and the assembly is extremely easy. Also, the antenna body 101 and the case member 104 can be removed and replaced with another combination. Further, even when the antenna main body 101 is housed in the mobile phone, the helical antenna 201 protrudes from the mobile phone, so that it is possible to suppress a decrease in the transmission / reception sensitivity, and based on the radio wave at the time of answering the incoming call. The light-emitting display circuit emits light, and it is possible to display an incoming call.

The light-emitting display circuit is not only supplied with power directly from the antenna main body 101, but also the light-emitting display circuit formed on the circuit board 202 is provided in the helical antenna 201 and is controlled by the electromagnetic field. In response to an incoming call, the light emitting display circuit is located in the strong electromagnetic field region of the helical antenna 201, and the helical antenna 201 is also supplied with driving power by electromagnetic coupling. You. Therefore, the driving efficiency of the light emitting element is improved.

FIG. 3 is a circuit diagram according to the first embodiment shown in FIGS. 1 and 2, and the same parts are denoted by the same reference numerals. 3, an anode, which is one end of a rectifier diode 301, is connected to a connection point between the linear antenna 106 and the helical antenna 201. That is, the anode, which is one end of the rectifier diode 301, is connected to the antenna unit.

A capacitor 303 and a coil 302 connected in series are connected between a connection point between the linear antenna 106 and the helical antenna 201 and a cathode, which is the other end of the rectifier diode 301. The coil 302 and the capacitor 303 constitute a parallel resonance circuit for efficiently picking up a voltage from a connection point between the linear antenna 106 and the helical antenna 201, and the resonance frequency of the resonance circuit depends on the radio wave used. Frequency. It is preferable that the resonance frequency of the resonance circuit completely coincides with the frequency of the radio wave used, from the viewpoint of voltage pickup efficiency, but it is sufficient if the voltage required to drive the LED 203 is obtained. Therefore, the voltage may be set in the vicinity of the operating frequency at which the voltage can be obtained in consideration of the variation in accuracy of the components to be used, that is, the resonance frequency of the resonance circuit is at least used. It may be set to be near the frequency of the radio wave.

Further, the resonance circuit does not necessarily need to be constituted only by the coil 304 and the capacitors 305 and 306, but includes the coil 304 and the capacitors 305 and 306 including the distributed capacitance and the distributed inductance. It may be. That is, the coil 304 and the capacitors 305 and 306 may constitute a resonance circuit that resonates at least near the frequency of the radio wave used. An LED 203 as a light emitting element is connected between a cathode, which is the other end of the rectifier diode 301, and a connection point of the capacitor 303 and the coil 302. Here, the rectifier diode 301, the coil 302, and the capacitor 303 constitute a drive circuit.

Next, the operation of the circuit according to the first embodiment configured as described above will be described. When transmitting a radio wave from a mobile phone, for example, when answering an incoming call of the mobile phone, a current flows from the mobile communication device to the linear antenna 106 and the helical antenna 201, and the radio wave is transmitted. At this time, a voltage generated at a connection point between the linear antenna 106 and the helical antenna 201 is picked up by a resonance circuit constituted by at least a coil 302 and a capacitor 303, and a current generated by this voltage is rectified by a diode 301, A driving current is supplied to the LED 203. Thereby, the LED 203 emits light efficiently.

Since the rectifier diode 301, the coil 302, and the capacitor 303 are disposed in an electromagnetic field generated by the helical antenna 201, for example, in the helical antenna 201, the driving circuit includes the antenna 106 and the helical antenna Not only is power supplied directly from the connection point of the antenna 201, but also power is supplied from the helical antenna 201 by electromagnetic coupling, and therefore, the driving efficiency of the LED 203 is improved.

As described above, the antenna device for a portable communication device according to the embodiment of the present invention has an antenna portion, at least a part of which has translucency, and is formed integrally with the antenna portion. An antenna device for a portable communication device, comprising: a case member; and a light-emitting element disposed in the case member, wherein the light-emitting element emits light using electric power generated in the antenna section as a power source. A rectifier diode 301 having one end connected to the antenna unit (the linear antenna 106 and the helical antenna 201); a capacitor 303 and a coil 302 connected in series between the other end of the rectifier diode 301 and the antenna unit; , An LED 203 connected between a connection point of the capacitor 303 and the coil 302 and the other end of the rectifier diode 301. The 303 and the coil 302 constitute a resonance circuit that resonates at least in the vicinity of the frequency of the radio wave used. Therefore, the light emission driving efficiency of the LED 203 can be improved, and the LED 203 can emit light stably. Further, since a rectifier circuit is formed by one rectifier diode 301, it can be realized with a simple configuration.

The antenna unit has a helical antenna 201, and the rectifier diode 301, the capacitor 303 and the coil 302 are disposed in the helical antenna 201, thereby enabling the helical antenna 201 to generate an electromagnetic field. With this configuration, the driving power of the LED 203 is supplied by electromagnetic coupling, and the driving efficiency can be further improved.

FIG. 4 is a circuit diagram according to a second embodiment of the present invention, and the same parts as those in FIG. 3 are denoted by the same reference numerals. In the first embodiment, one LED 203 is provided. In the second embodiment, a plurality of LEDs 203, 401, and 402 are connected in series and emit light of different colors. This is different from the first embodiment. Other points such as the drive circuit and the LEDs 203, 401, and 402 are disposed in the helical antenna 201 and are disposed in the electromagnetic field of the helical antenna 201 are the same as those in the first embodiment. .

Hereinafter, only the difference will be described. The current generated by the voltage picked up by the resonance circuit is rectified by the diode 301 and then supplied to the three LEDs 401, 203 and 402 connected in series. The LEDs 401, 203, and 402 simultaneously emit light of different colors. As a result, the incoming call state of the mobile phone is displayed in a mixed color of the LEDs 401, 203, and 402. As described above, in the second embodiment, since the plurality of LEDs 203, 401, and 402 are connected in series, the on-resistances (resistances during light emission) of the LEDs 203, 401, and 402 are different from each other. In this case, the LEDs 203, 401, and 402 can be driven to emit light at the same time, and a variety of light-emitting displays can be performed with a mixture of these colors.

In the second embodiment, a plurality of LEDs 401, 203, and 402 are connected in series. However, a plurality of LEDs are connected in parallel, or a combination of series connection and parallel connection (series-parallel connection). Connection), a plurality of LEDs may emit light simultaneously. At this time, in order to cause a plurality of LEDs connected in parallel to emit light at the same time, the LEDs connected in parallel should have the same on-resistance.

Although the above embodiments have been described with reference to the example of the antenna device for a mobile phone, the embodiments can be applied to an antenna device for another portable communication device such as a PHS. Further, it is not always necessary to dispose the driving circuit, or the LED and the driving circuit so as to completely fit in the helical antenna 201, and when a desired effect is obtained, it is convenient to assemble parts. In consideration of the properties and the like, a part of these may be arranged so as to be exposed near the outside of the helical antenna 201. That is, if the drive circuit, or the LED and the drive circuit are arranged in an electromagnetic field generated by the helical antenna 201, the above-described effect can be obtained. Further, in each of the above embodiments, the antenna main body 106, the helical antenna 201, and the drive circuit are configured to be directly electrically connected. However, all or a part of them may be connected by magnetic coupling, electrostatic coupling, or the like. You may comprise so that it may electrically connect using the method by electromagnetic coupling.

[0033]

[Effect of the invention]

 ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to improve the light emission drive efficiency of a light emitting element and to make a light emitting element emit light stably with a simple structure. In addition, by causing the plurality of light emitting elements to emit light, there is an effect that various light emitting displays can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an antenna device for a mobile phone according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view according to the first embodiment of the present invention.

FIG. 3 is a circuit diagram according to a first embodiment of the present invention.

FIG. 4 is a circuit diagram according to a second embodiment of the present invention.

FIG. 5 is a circuit diagram of a conventional mobile phone antenna device.

[Explanation of symbols]

101: Antenna body 104: Case member 105: Upper contact 106: Linear antenna constituting the antenna 108: Antenna mounting 110: Lower contact 201 ... A helical antenna 202 that constitutes an antenna unit 202 circuit boards 203, 401, and 402 LEDs as light emitting elements 204 drive circuits 205 pedestals 301 rectifier diodes 302 that constitute drive circuits ... Coil forming drive circuit and resonance circuit 305... Capacitor forming drive circuit and resonance circuit

Claims (5)

[Utility model registration claims] An antenna unit, a case member having at least a part thereof having a light-transmitting property and integrally formed with the antenna unit, and a light-emitting element provided in the case member; An antenna device for a portable communication device configured to cause the light emitting element to emit light by using power generated in the antenna unit as a power supply, a rectifier diode having one end connected to the antenna unit,
A capacitor and a coil connected in series between the other end of the rectifier diode and the antenna unit, and a light emitting element connected between a connection point of the capacitor and the coil and the other end of the rectifier diode. Wherein the capacitor and the coil constitute a resonance circuit that resonates at least in the vicinity of the frequency of the radio wave used. 2. The mobile phone according to claim 1, wherein the antenna section has a helical antenna, and the rectifier diode, the capacitor, and the coil are disposed in an electromagnetic field generated by the helical antenna. Antenna device for portable communication equipment. 3. The antenna device for a portable communication device according to claim 2, wherein said rectifier diode, capacitor and coil are disposed in said helical antenna. 4. The antenna device for a portable communication device according to claim 1, wherein said light emitting element is constituted by a plurality of light emitting diodes connected in series. 5. The light emitting device according to claim 1, wherein the plurality of light emitting diodes are connected in parallel or in series / parallel, and the plurality of light emitting diodes connected in parallel have the same on-resistance. 4. The antenna device for a portable communication device according to any one of claims 3 to 3.