JP3069282U - Antenna device for portable communication equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To notify by various light-emitting displays and to improve the driving efficiency of light-emitting elements, and to reduce transmission / reception sensitivity even when the antenna body is housed in a portable communication device. Control. SOLUTION: A helical antenna 201 electrically connected to an antenna body 101 is disposed in a case member 104, and an LED array 20 having a plurality of LEDs is provided.
3 and a drive circuit for selectively driving the plurality of LEDs to emit light are provided in the helical antenna 201.

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, in a portable communication device such as a mobile phone and a PHS, an antenna device for a portable communication device having a linear antenna body has been used 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, in the method of notifying by a ring tone, a method of visually notifying the incoming call by light-emitting display without using the ring tone has been used, because it causes noise to surrounding people.

In the method of visually notifying an incoming call, a case member is attached to an upper end of the antenna main body, and a light emitting display circuit is provided in the case member. The light emitting display circuit includes a rectifying diode electrically connected to the antenna body, and a light emitting diode (LED) that emits light by the output of the rectifying diode. The rectifying diode rectifies the alternating current power to direct current and drives the LED to emit light using the output of the rectifying diode as a power supply, thereby visually notifying that a portable communication device has received an incoming call. I try to do it.

[0004]

[Problems to be solved by the invention]

 In the above-described antenna device for a portable communication device that visually notifies an incoming call, since a single LED is used, there is a problem that the light emission display is performed in a single color and becomes monotonous. As a method of solving this problem, a method of using a plurality of LEDs can be considered. However, when a plurality of single-piece LEDs are accommodated in the case member, the size of the case member becomes extremely large. Therefore, there is a problem that the size of the portable communication device is increased in spite of being an antenna device for the portable communication device, and the portability of the portable communication device is deteriorated.

Further, in the portable communication device antenna device, the light emitting display circuit is simply connected to the antenna main body. Therefore, there is a problem that the driving efficiency of the LED is poor because the LED is driven only by using the power directly input from the antenna main body. Further, when the antenna main body is housed in the portable communication device, there is a problem that the transmission / reception sensitivity of the portable communication device is deteriorated.

According to the present invention, it is possible to perform notification by various light emission displays and to improve the driving efficiency of the light emitting element, and to suppress the deterioration of the transmission / reception sensitivity even when the antenna body is housed in the portable communication device. The task is to be able to do so. Another object of the present invention is to reduce the size.

[0007]

[Means for Solving the Problems]

 According to the present invention, a linear antenna main body, a case member having at least a part thereof having translucency and attached to the antenna main body, and a light emitting element disposed in the case member are provided. Wherein the light emitting element emits light using electric power generated in the antenna main body as a power source, wherein the helical antenna electrically connected to the antenna main body is connected to the case member. And a conversion circuit for converting an AC signal from the antenna main body into a DC signal and outputting the signal, a plurality of light emitting elements, and selectively using the output of the conversion circuit as a power supply. And a driving circuit for driving light emission is provided in the helical antenna. The drive circuit selectively drives the plurality of light emitting elements to emit light using the output of the conversion circuit as a power supply.

Further, according to the present invention, a linear antenna main body, at least a part of which is translucent, and a case member attached to the antenna main body, and a case member disposed in the case member. A light emitting element, wherein the light emitting element emits light using electric power generated in the antenna main body as a power supply, wherein the helical antenna electrically connected to the antenna main body. A conversion circuit for converting an AC signal from the antenna main body into a DC signal and outputting the converted signal, a plurality of light emitting elements, and the plurality of light emitting devices using the output of the conversion circuit as a power supply. There is provided an antenna device for a portable communication device, wherein a driving circuit for selectively driving an element to emit light is disposed in an electromagnetic field generated by the helical antenna. . The drive circuit selectively drives the plurality of light emitting elements to emit light using the output of the conversion circuit as a power supply.

The driving circuit has an oscillation circuit and a plurality of output terminals connected to the plurality of light emitting elements, and selectively emits the plurality of light emitting elements in response to an output signal of the oscillation circuit. It may be configured to include a light-driven counter means. Further, the counter means is constituted by a ring counter having a plurality of output terminals connected to the plurality of light emitting elements, and the ring counter responds to an output signal of the oscillation circuit to supply a drive signal to the plurality of light emitting elements. May be sequentially output to selectively drive the plurality of light emitting elements to emit light.

Further, the plurality of light emitting elements may be constituted by a plurality of light emitting diodes disposed in one chip. Furthermore, the conversion circuit, the plurality of light emitting elements, and the drive circuit may be formed on a single circuit board and arranged in the helical antenna.

[0011]

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

The antenna main body 101 is formed in a cylindrical shape by a light-transmitting member (for example, a light-transmitting resin) and covers the linear antenna portion 106 formed of, for example, a shape memory alloy. It comprises a tube member 107, a conductive upper contact portion 105 formed integrally with the linear antenna portion 106, and a conductive lower contact portion 110 formed integrally with the linear antenna portion 106. The linear antenna portion 106 is colored, and is covered with the tube member 107 so as to prevent peeling of 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 portion 106 and the tube member 107 inserted through the through-holes, and is screwed into the mobile phone with the screw portion 109 so that the antenna main body portion 101 is attached 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 part 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 (eg, 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. Threads 208 are formed on the lower outer surface of the case top 102 and the inner surface of the case bottom 103, respectively, and 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 209 is formed at the center of the bottom of the case bottom portion 103, and a screw portion 209 is formed on the upper outer surface of the upper contact portion 105. The case member 104 is detachably attached to the upper contact portion 105 by screwing the two. 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 disposed in the case member 104. Here, the screw portions 209 formed on the case bottom portion 103 and the upper contact portion 105 constitute a mounting member for detachably attaching the case member 104 to the antenna main body portion 101, and also constitute 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 light of 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 207, and a fixing means such as soldering or caulking are attached to the pedestal 207 in the case member 104. A circuit board 202 is provided which is fixed and electrically connected to the circuit board 202. The pedestal 207 is electrically connected to the upper contact portion 105 of the antenna body 101 via the case bottom 103 and the screw portion 209, and is also directly connected to the upper contact portion 105 of the antenna body 101. I have. The pedestal 207 is held in a state of being placed in the case bottom 103, and the electrical connection between the pedestal 207 and the upper contact portion 105 is made by the urging force of the helical antenna 201 as described later. It is configured so as to be surely realized.

A light emitting diode (LED) array 203 as a light emitting element, a driving circuit 204, a smoothing capacitor 205, and a rectifying diode 206 are fixed to the circuit board 202 by soldering. The LED array 203, the drive circuit 204, the smoothing capacitor 205, and the rectifying diode 206 are connected by a wiring pattern formed on the circuit board 202, as shown in FIG. The LED array 203 is a one-chip light emitting element having a plurality of light emitting elements, and is constituted by a plurality of light emitting diodes as a plurality of light emitting elements disposed in one chip. Note that, in the present embodiment, the LED array 203 includes three LEDs of a red (R) light emitting LED, a green (G) light emitting LED, and a blue (B) light emitting LED.

The rectifier diode 206 is a one-chip rectifier diode composed of two rectifier diodes. Here, the LED array 203, the driving circuit 204, the smoothing capacitor 205, and the rectifying diode 206 constitute a light emitting display circuit. The helical antenna 201 has one (upper) abutting on the inner wall of the case top 102 of the case member 104 and the other (lower) abutting on the pedestal 207. The base 207 is pressed and urged, and is in contact with the case bottom portion 103 and the upper contact portion 105.

With the above configuration, the helical antenna 201, the pedestal 207, 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 light emitting display circuit formed on the circuit board 202 is provided in the helical antenna 201. Also, when the mobile phone transmits a radio wave, the one end of the helical antenna 201 is set to a point where the maximum voltage is reached (in other words, a point where the current becomes zero). It is connected.

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 connected while the linear antenna portion 106 is inserted into the tube member 107. The antenna main body 101 is formed by attaching to the linear antenna 106 by a method such as caulking. Thereby, the antenna main body 101 in which the linear antenna section 106 is covered with the tube member 107 is completed.

Next, after the circuit board 203 on which the LED array 203, the drive circuit 204, the capacitor 205, and the rectifying diode 206 are soldered to the wiring pattern is integrally mounted on the base 207 by soldering, caulking, or the like, The pedestal 207 is placed in the case bottom 103. At this time, the donut-shaped lowermost surface of the pedestal 207 contacts the case bottom 103. Next, the helical antenna 201 is placed on the pedestal 207 and the screw portion 208 is screwed together, whereby the case top 102 and the case bottom 103 are integrally assembled, and the light emitting display circuit is housed in the case member 104. The antenna head assembly is completed.

At this time, the helical antenna 201 is pressed and compressed by the inner wall of the case top 102, whereby the pedestal 207 is fixed while being pressed against the case bottom 103. Therefore, the helical antenna 201 and the light emitting display circuit are electrically connected via the pedestal 207. 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 portion 209 of the case bottom portion 103 and the screw portion 209 of the upper contact portion 105. At this time, the pedestal 207 is electrically connected directly to the upper contact portion 105 by the pressing force of the helical antenna 201 causing the concave portion formed at the lower center of the pedestal 207 to be directly pressed into contact with the upper contact portion 105. , 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-dedicated 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 because the light emitting display circuit formed on the circuit board 202 is disposed in the helical antenna 201, At the time of answering the incoming call, the light emitting display circuit is located in the strong electric field region of the helical antenna 201, and power is also supplied from the helical antenna 201 by electromagnetic coupling. Therefore, the driving efficiency of the light emitting element is improved.

FIG. 3 is a circuit diagram according to the embodiment shown in FIGS. 1 and 2, and shows a linear antenna portion 302 (corresponding to the linear antenna portion 106 in FIGS. 1 and 2). FIG. 3 is a diagram showing a helical antenna 301 (corresponding to the helical antenna 201 in FIG. 2) provided in a case member 104 and a light emitting display circuit formed on a printed circuit board 203.

In FIG. 3, a connection point between the linear antenna section 301 and the helical antenna 302 is provided with an anode of a rectifying diode 303 (corresponding to the rectifying diode 206 in FIG. 2) and a rectifying diode 304 (FIG. 2). Corresponding to the rectifying diode 206.) is connected to the cathode. The cathode of the rectifier diode 303 and the anode of the rectifier diode 304 are connected via a smoothing capacitor 305 (corresponding to the smoothing capacitor 205 in FIG. 2).

Both terminals of the smoothing capacitor 305 are connected to a power supply terminal and a reference terminal of an oscillation circuit 306 and a ring counter 307 as a counter means, and a red light emitting LED 308, a green light emitting LED 309, and a blue light emitting LED of the LED array 203. It is connected to the anode terminal of LED 310. An output terminal of the oscillation circuit 306 is connected to a clock input terminal of the ring counter 307. The three output terminals of the ring counter 307 are connected to the cathode terminals of the LEDs 308 to 310, respectively.

The ring counter 307 responds to a clock pulse input from the oscillation circuit 306 to sequentially drive the LEDs 308 to 310 connected to the three output terminals to emit light one by one, and to repeat the driving. Operate. Here, the two rectifying diodes 303 and 304 and the smoothing capacitor 305 connected in reverse form a conversion circuit that converts an AC signal from the antenna main body 101 into a DC signal and outputs the DC signal. The oscillation circuit 306 and the ring counter 307 constitute a drive circuit. The two rectifying diodes 303 and 304, the smoothing capacitor 305, the oscillation circuit 306, the ring counter 307, and the LEDs 308 to 310 constitute a light emitting display circuit. The rectifying diodes 303 and 304 are constituted by Schottky barrier diodes having a small voltage drop, and the rectifying diodes 303 and 304 constitute a rectifying circuit.

Next, the operation of the light emitting display circuit configured as described above will be described. When transmitting a radio wave from a mobile phone, for example, when receiving a call from the mobile phone, a current flows from the mobile communication device to the linear antenna unit 302 and the helical antenna 301, and the radio wave is transmitted. At this time, an AC signal is output to the rectifying diodes 303 and 304 from the connection point between the linear antenna unit 302 and the helical antenna 301. The AC signal is rectified by rectifying diodes 303 and 304, then smoothed by a smoothing capacitor 305, converted into a DC signal, and output. The DC power is supplied to the oscillation circuit 306, the ring counter 307, and the LEDs 308 to 310 as DC power.

The oscillation circuit 306 starts the oscillating operation in response to the supply of the power, and outputs a clock pulse to the ring counter 307. Each time the clock pulse is input, the ring counter 307 sequentially drives the LEDs 308 to 310 to emit light one by one, and repeats this. That is, upon receiving the first clock pulse from the oscillation circuit 306, the ring counter 307 first drives only the LED 308 to emit light in response to this. As a result, the LEDs 309 and 310 do not emit light but only the LED 308 emits light, so that the LED array 203 appears to emit red light as a whole.

Next, upon receiving the next clock pulse from the oscillation circuit 306, the ring counter 307 drives only the LED 309 to emit light in response to the next clock pulse. Accordingly, the LEDs 308 and 310 do not emit light, and only the LED 309 emits light. Therefore, the LED array 203 appears to emit green light as a whole. Next, when receiving the next clock pulse from the oscillation circuit 306, the ring counter 307 drives only the LED 310 to emit light in response to the next clock pulse. As a result, the LEDs 308 and 309 do not emit light, and only the LED 310 emits light. Therefore, the LED array 203 appears to emit blue light as a whole. Next, upon receiving the next clock pulse from the oscillation circuit 306, the ring counter 307 drives only the LED 308 to emit light in response to the next clock pulse. Accordingly, the LEDs 309 and 310 do not emit light, and only the LED 308 emits light. Therefore, the LED array 203 appears to emit red light as a whole.

Thereafter, each time a clock pulse is input from the oscillation circuit 306, the ring counter 307 sequentially drives the LEDs 308 to 310 to emit light as described above. Accordingly, when the mobile phone responds to the incoming call, the LEDs 308 to 310 sequentially emit light, so that the notification of the incoming call to the mobile phone is substantially performed by multicolor light emission display. Further, not only is the electric power supplied directly from the antenna main body 101 to the light emitting display circuit, but also because the light emitting display circuit is disposed in the helical antenna 201, the electric power is also supplied from the helical antenna 201 by electromagnetic coupling. Is supplied, and the driving efficiency of the LEDs 308 to 310 is improved.

As described above, the antenna device for a portable communication device according to the embodiment of the present invention includes a linear antenna main body 101 and at least a part of the antenna main body 101 having translucency. A portable communication device having a case member 104 attached to the base member, and a light emitting element disposed in the case member 104, wherein the light emitting element emits light using electric power generated in the antenna body 101 as a power supply. A helical antenna 201 connected to the antenna main body 101 by wire or electromagnetic coupling in the case member 104, and a conversion circuit for converting an AC signal from the antenna main body 101 into a DC signal and outputting the DC signal. (Diodes 303 and 304, capacitor 305), a plurality of light emitting elements (LEDs 308 to 310), and an output of the conversion circuit. A driving circuit (an oscillation circuit 306 and a ring counter 307) for selectively driving the plurality of light emitting elements to emit light as a light source is provided in the helical antenna 301. Therefore, it is possible to perform notification by various light emission displays. Further, the presence of the helical antenna 201 makes it possible to suppress the deterioration of the transmission / reception sensitivity even when the antenna main body 101 is housed in the portable communication device.

Here, the driving circuit has an oscillation circuit 306 and a plurality of output terminals connected to the plurality of light emitting elements, and selects the plurality of light emitting elements in response to an output signal of the oscillation circuit 306. And a counter means for driving light emission. Further, the counter means is constituted by a ring counter 307 having a plurality of output terminals connected to the plurality of light emitting elements, and the ring counter 307 responds to an output signal of the oscillation circuit 306 to the plurality of light emitting elements. By sequentially outputting drive signals, the plurality of light emitting elements are selectively driven to emit light. Therefore, various light-emitting displays can be performed with a simple configuration.

Further, since the plurality of light emitting elements are constituted by a plurality of light emitting diodes 308 to 310 disposed in one chip, the light emitting elements can be miniaturized and have excellent portability. An antenna device for a portable communication device can be provided. Further, the conversion circuit, the plurality of light-emitting elements, and the driving circuit are formed on one circuit board 202 and are disposed in the helical antenna 201. Power is also supplied to the light emitting display circuit by the applied electromagnetic field, and the driving efficiency of each light emitting element is improved.

Although the present embodiment has been described with reference to the example of the antenna device for a mobile phone, the present invention can be applied to an antenna device for another portable communication device such as a PHS. In addition, the conversion circuit, the plurality of light emitting elements, and the driving circuit do not necessarily need to be disposed so as to be completely accommodated in the helical antenna 201. If a desired effect can be obtained, the conversion circuit, a plurality of light emitting elements, and the driving circuit are required. In consideration of convenience and the like, a part of them may be arranged so as to be exposed near the outside of the helical antenna 201, and the wording that they are arranged inside the helical antenna includes this case. It is what is done. That is, if the conversion circuit, the plurality of light emitting elements, and the driving circuit are arranged in an electromagnetic field generated by the helical antenna 201, the above-described effect can be obtained. Further, in the present embodiment, the antenna body 106, the helical antenna 201, and the light emitting display circuit are configured to be directly electrically connected. However, all or a part of these components may be magnetically coupled or electrostatically coupled. It may be configured to be electrically connected by using a method by electromagnetic coupling.

Furthermore, in the present embodiment, the LEDs 308 to 310 are sequentially driven to emit light one by one using the ring counter 307, but various counters are configured using a shift register or the like. Thus, it is possible to perform light emission driving in various modes such as light emission driving two by two or light emission driving in a random order.

[0041]

[Effect of the invention]

 According to the present invention, it is possible to perform notification by various light emission displays and improve the driving efficiency of the light emitting element, and it is possible to reduce the deterioration of the transmission / reception sensitivity even when the antenna body is housed in a portable communication device. It becomes possible to suppress. Further, according to the present invention, it is possible to reduce the size.

[Brief description of the drawings]

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

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

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

[Explanation of symbols]

101: Antenna body 104: Case member 105: Upper contact 106, 302: Linear antenna 110: Lower contact 201, 301: Helical antenna 202: Circuit board 203: LED array as a plurality of light emitting elements constituting a light emitting display circuit 204 ... Driving circuits 205, 305 ... Smoothing capacitors 206, 303, 304 constituting a conversion circuit and a light emitting display circuit ..Rectifier diodes 207 constituting the conversion circuit and the light emitting display circuit 207... Pedestals 208 and 209... Thread part 306 constituting the mounting member 306... .Ring counters 308 to 310 as counter means constituting a driving circuit and a light emitting display circuit. Emitting diode as an element

Claims (6)

[Utility model registration claims] 1. An antenna device comprising: a linear antenna main body; a case member having at least a part thereof translucent; being attached to the antenna main body; and a light emitting element disposed in the case member. An antenna device for a portable communication device in which the light emitting element emits light using electric power generated in the antenna main body as a power source, wherein a helical antenna electrically connected to the antenna main body is arranged in the case member. And a conversion circuit for converting an AC signal from the antenna main body into a DC signal and outputting the signal, a plurality of light emitting elements, and selectively driving the plurality of light emitting elements to emit light using an output of the conversion circuit as a power supply. An antenna device for a portable communication device, wherein a driving circuit is provided in the helical antenna. 2. An antenna device comprising: a linear antenna main body; a case member having at least a part thereof having translucency and attached to the antenna main body; and a light emitting element disposed in the case member. An antenna device for a portable communication device in which the light emitting element emits light using electric power generated in the antenna main body as a power source, wherein a helical antenna electrically connected to the antenna main body is arranged in the case member. A conversion circuit for converting an AC signal from the antenna main body into a DC signal and outputting the converted signal; a plurality of light emitting elements; and selectively driving the plurality of light emitting elements to emit light using an output of the conversion circuit as a power supply. An antenna device for a portable communication device, comprising a drive circuit and an electromagnetic field generated by the helical antenna. 3. The driving circuit has an oscillation circuit and a plurality of output terminals connected to the plurality of light emitting elements, and selectively drives the plurality of light emitting elements in response to an output signal of the oscillation circuit. 3. The antenna device for a portable communication device according to claim 1, further comprising: counter means for driving light emission. 4. The light emitting device according to claim 1, wherein said counter means comprises a ring counter having a plurality of output terminals connected to said plurality of light emitting elements, said ring counter responding to an output signal of said oscillation circuit. 4. The antenna device for a portable communication device according to claim 3, wherein the plurality of light emitting elements are selectively driven to emit light by sequentially outputting drive signals to the plurality of light emitting elements. 5. The portable communication device according to claim 1, wherein the plurality of light emitting elements are constituted by a plurality of light emitting diodes disposed in one chip. Antenna device. 6. The helical antenna according to claim 1, wherein the conversion circuit, the plurality of light emitting elements, and the driving circuit are formed on a single circuit board and disposed in the helical antenna. 9. The antenna device for a portable communication device according to claim 1.