JP2000134013A - Display device for portable communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembly with a simple configuration by providing a display circuit that is electrically connected to mount and a helical antenna which is electrically connected to the mount and electrically connects the mount to a linear antenna by energising the mount. SOLUTION: One part (upper part) of a helical antenna 201 is brought into contact by pressing with the inner wall of a case 101, the other (lower part) also comes into contact with mount 206, and the mount 206 is energized downward by the spring function of the helical antenna 201, is brought into contact with and is electrically connected to a linear antenna 103 by such a manner that pressure is applied. Thus, the helical antenna 201 and a display circuit provided in a printed wiring board 202 are connected to a linear antenna 100 through the mount 206. A lower part 108 is attached to the linear antenna 100 by screwing screws 207 and 208 and then, the printed wiring board 202 to which a LED 205, etc., is soldered and the mount 206 provided integrally with it are mounted inside the lower part 108.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a display device for a portable communication device, such as an S (Personal Handyphone System) or the like, which can visually recognize an incoming radio wave condition or the like.

[0002]

2. Description of the Related Art Conventionally, a light-transmitting case has been attached to the end of a linear antenna of a mobile phone so as to visually inform the user when the mobile phone enters a call incoming or a call state. A display device for a mobile phone in which a display circuit including a rectifying diode and a light emitting diode is disposed in the case is used. In the display device for a mobile phone, when a call to the mobile phone is made, a response radio wave output from the mobile phone in response to the call signal is rectified by the rectifying diode to light the light emitting diode. By emitting light, an incoming call to the mobile phone is visually notified.

[0003]

However, when the linear antenna is housed in a portable telephone, the sensitivity of the linear antenna is reduced. As a method of compensating for a decrease in sensitivity when the linear antenna is stored in a mobile phone, a helical antenna connected to the linear antenna is disposed in the case, and the helical antenna is stored in a state where the linear antenna is stored. A method is conceivable in which the antenna projects from the mobile phone.

However, if the helical antenna is housed in the case and the helical antenna is electrically connected to the linear antenna by soldering or the like, the structure and the assembly process become complicated. there were. Further, when the display device is used for another portable communication device such as a PHS, the same problem may occur.

The present invention has been made in view of the above problems, and has as its object to provide a display device for a portable communication device that has a simple structure and is easy to assemble.

[0006]

A display device for a portable communication device according to the present invention comprises a linear antenna and at least a part thereof having translucency and being attached to the linear antenna. In the case, a pedestal having conductivity, a display circuit electrically connected to the pedestal, and the pedestal being linearly connected to the pedestal by being electrically connected to the pedestal and energizing the pedestal. And a helical antenna electrically connected to the antenna. The helical antenna biases the base toward the linear antenna,
Thereby, the helical antenna and the linear antenna are electrically connected via the pedestal, and a decrease in sensitivity when the linear antenna is housed in the portable communication device is compensated. Further, the display is performed by the display circuit based on the AC signal supplied through the pedestal.

The display circuit includes a drive circuit that rectifies and outputs an AC signal supplied through the pedestal, and a plurality of light emitting diodes that emit light of different colors according to the output of the drive circuit. Can be configured. The drive circuit may include a rectifying diode for rectifying the AC signal, and a smoothing capacitor for smoothing an output of the rectifying diode and driving the light emitting diode to emit light.

[0008]

FIG. 1 is a front view of a display device for a portable communication device according to a first embodiment of the present invention, showing an example of a display device for a portable telephone applied to a portable telephone. .
FIG. 2 is a partial front view showing the inside of the translucent case 101 in FIG. 1, and the same parts as those in FIG. 1 are denoted by the same reference numerals.

Referring to FIGS. 1 and 2, the display device for a portable telephone according to the present embodiment includes a linear antenna 100 formed linearly and a case 101 disposed above the linear antenna 100. I have.

The linear antenna 100 includes a linear antenna element 103 formed in a straight line, and a fixing portion 10 when the linear antenna element 103 is stored in a portable telephone (not shown).
4, a linear antenna element 10 electrically connected to a power supply circuit (not shown) of the mobile phone through
3 is extended from the mobile phone, the lower contact portion 105 electrically connected to the power supply circuit of the mobile phone via the fixing portion 104, and the linear antenna element 103 and the protection tube 106 are provided in the through holes (not shown). Is inserted and screwed into the mobile phone with a screw 109 to fix the mobile phone display device to the mobile phone, and the conductive fixing in which the through holes are fitted to the upper contact portion 102 and the lower contact portion 105. And a unit 104.

The case 101 is fixed to the tip of the upper contact portion 102, and is formed at least in part of a resin having a light transmitting property. It is constituted by a bottom portion 108 formed of a light metal. Top 107
A screw (not shown) is formed on each of the and bottom portions 108, and these are integrated by screwing them together. With this configuration, the top 107 can be replaced (for example, replaced with a top having a different color). A female screw 208 is formed in the center of the bottom part 108, and the case 101 is attached to the linear antenna 100 by screwing with a male screw 207 integrally formed on the upper part of the upper contact part 102. In addition, the linear antenna element 10
3 has a decorative color and is a transparent protective tube 1
06.

On the other hand, as shown in FIG. 2, a case 101 has a helical antenna 201 which functions as an antenna and also functions as a spring member. Pedestal 206, printed circuit board 202 fixed to pedestal 206 by soldering or caulking and electrically connected
Is provided. A light emitting diode (LED) 205 as a light emitting element, two rectifying diodes 203, and a smoothing capacitor 204 are fixed to the printed circuit board 202 by soldering.

The pedestal 206 is held in a state of being placed in the bottom portion 108, and the pedestal 206 and the linear antenna 1 are held.
Electrical contact with 00 is made by the urging force of the helical antenna 201 as described later. In addition, LED
205, the rectifying diode 203 and the smoothing capacitor 204 constitute a display circuit.

The helical antenna 201 has one (upper) contact with the inner wall of the case 101 and the other (lower) with the pedestal 206.
The pedestal 206 is urged downward by the first spring function, is pressed and contacts the linear antenna 103, and is electrically connected. Thus, the display circuits provided on the helical antenna 201 and the printed circuit board 202 are electrically connected to the linear antenna 100 via the base 206.
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 is zero).
6 is connected to the intermediate point.

When assembling the display device for a portable telephone constructed as described above, the bottom portion 108 is attached to the linear antenna 100 by screwing the screws 207 and 208, and then the LED 205 and the like are soldered. The printed circuit board 202 and the pedestal 206 integrated therewith are
8. Next, the helical antenna 201 is placed on the pedestal 206, and the top portion 107 is screwed into the bottom portion 108 to complete the process. At this time, the helical antenna 201 is pressed and compressed by the inner wall of the top 107, whereby the pedestal 206 is moved to the linear antenna 10.
It is fixed while being pressed against the 0 male screw 207.
Therefore, the helical antenna 20 is
1. The display circuit and the linear antenna 100 are electrically connected.

Therefore, the helical antenna 201 and the display circuit can be connected to the linear antenna 10 without using any special mounting-dedicated parts and without performing a complicated soldering operation.
Since it is possible to electrically connect to zero, the configuration is simple and the assembly is extremely easy. In addition, even when the linear antenna element 103 is stored in the mobile phone, the helical antenna 201 protrudes from the mobile phone, thereby making it possible to suppress a decrease in sensitivity. Can be displayed.

FIG. 3 is a circuit diagram according to the first embodiment shown in FIGS. 1 and 2, in which a linear antenna 301 (corresponding to the linear antenna 100 in FIGS. 1 and 2) and a case 10 are shown.
FIG. 3 is a diagram showing a helical antenna 302 (corresponding to the helical antenna 201 in FIG. 2) and a display circuit disposed in the device 1;

In FIG. 3, a rectifying diode 3 is connected to a connection point between the linear antenna 301 and the helical antenna 302.
Connection points 03 and 304 are connected. Diode 3
03, the anode and the cathode of the diode 304, the LED 306 (the LED 205 of FIG. 2).
Corresponding to ) Are connected in series in a loop. LE
A smoothing capacitor 305 is connected in parallel with D306. The two rectifying diodes 303 and 304, the smoothing capacitor 305, and the LED 306 constitute a display circuit. The rectifier diodes 303 and 304 and the smoothing capacitor 305 constitute a drive circuit. The rectifier diodes 303 and 304 are constituted by Schottky barrier diodes having a small voltage drop.
It constitutes a half-wave flow circuit.

In the display device configured as described above, the linear antenna 301 is used when the mobile phone answers an incoming call or the like.
An AC signal is output from a connection point between the helical antenna 302 and the helical antenna 302. At this time, as described above, the one end, which is the uppermost part of the helical antenna 302, is set to the point where the maximum voltage is reached (in other words, the point where the current becomes zero). Since the point is connected to the midpoint of the entire antenna, the diode 303,
An alternating current is supplied to a connection point 304. The AC signal is rectified by rectifying diodes 303 and 304, and then smoothed by a smoothing capacitor 305.
A direct current is supplied to the LED 306 to emit light. Therefore, the notification of the incoming call is substantially displayed by the light-emitting display when the mobile phone answers the incoming call.

FIG. 4 is a circuit diagram of a display device for a portable telephone according to a second embodiment of the present invention. The front view of the display device for a mobile phone according to the present embodiment and the internal configuration diagram of the case have substantially the same configuration as those in FIGS. 1 and 2, but are connected to two LEDs having different emission colors and the LEDs. The second embodiment differs from the first embodiment in that two smoothing capacitors are used. The description of the same parts as those in the first embodiment will be omitted, and the following description will be made with reference to FIGS.
The difference will be described with reference to FIG.

Although not shown, in the second embodiment, two LEDs 403, 408, two smoothing capacitors 404, 407, two Rectifier diodes 405, 4
06 is soldered and housed in the case 101 in the same manner as in the first embodiment.

A linear antenna 401 (see FIGS. 1 and 2)
Corresponding to the linear antenna 100. ) And the helical antenna 402 (corresponding to the helical antenna 201 in FIG. 2) are connected to the cathode of the rectifying diode 405. The anode and cathode of the diode 405, the LED 403, the anode and cathode of the diode 406, and the LED 408 are connected in series in a loop. In parallel with the LEDs 403 and 408,
Smoothing capacitors 404 and 407 are connected. Rectifier diodes 405 and 406 and smoothing capacitor 4
Reference numerals 04 and 407 constitute a drive circuit. Note that the diodes 405 and 406 are constituted by Schottky barrier diodes with a small voltage drop, and constitute a half-wave rectifier circuit.

In the display device configured as described above, the linear antenna 401 is used when the mobile phone answers a call.
An AC signal is output from a connection point between the helical antenna 402 and the helical antenna 402. At this time, as in the first embodiment, the one end, which is the uppermost part of the helical antenna 402, is set to the point where the maximum voltage is reached (in other words, the point where the current is zero), and the diode Since the cathode of 405 is connected to the midpoint of the whole antenna, the diode 40
The cathode side of 5 is supplied with an alternating current. The AC signal is rectified by rectifying diodes 405 and 406, and then smoothed by smoothing capacitors 404 and 407. A DC current is supplied to LEDs 403 and 408.
The LEDs 403 and 408 emit light of different colors. Therefore, the display of the incoming call response of the mobile phone substantially provides a notification display at the time of the incoming call.

As described above, in each of the above embodiments, at least a part of the linear antennas 100, 301, and 401 has translucency, and
301, a case 101 attached to 401,
A pedestal 206 having conductivity, a display circuit electrically connected to the pedestal 206, and a linear antenna 1 electrically connected to the pedestal 206 and energizing the pedestal 206 in the case 101.
Since it is provided with helical antennas 201, 302, and 402 electrically connected to 00, 301, and 401, it is possible to provide a display device for a mobile phone that has a simple configuration and is easy to assemble. Become.

The display circuit includes rectifying diodes 405 and 406 for rectifying and outputting an AC signal supplied through the pedestal 206, and smoothing capacitors 404 and 40.
7 and a plurality of light emitting diodes 403, 4 emitting light of different colors depending on the outputs of the smoothing capacitors 404, 407.
08 makes it possible to emit light in different colors. Although each of the embodiments has been described with reference to a mobile phone, the present invention is applicable to a display device for another portable communication device such as a PHS. Also, an example of a half-wave rectifier circuit using two diodes as the rectifier circuit has been described.
A bridge rectifier circuit is composed of four diodes,
Full-wave rectification may be performed.

[0026]

According to the present invention, it is possible to provide a display device for a portable communication device which has a simple structure and is easy to assemble.

[Brief description of the drawings]

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

FIG. 2 is a partial front view of FIG.

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

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

[Explanation of symbols]

100, 301, 401: Linear antenna 101: Case 103: Linear antenna element 201, 302, 402: Helical antenna 203, 303, 304, 405, 406: Display circuit configuration Rectifying diodes 204, 305, 404, 407... Smoothing capacitors 205, 306, 403, 408... Constituting a display circuit. Light emitting diodes 206 as light emitting elements constituting a display circuit.

Claims (3)

[Claims] 1. A linear antenna, at least a part of which has translucency, and has a case attached to the linear antenna, wherein the case has a conductive pedestal, and the pedestal has A display circuit electrically connected thereto, and a helical antenna electrically connected to the pedestal and electrically connecting the pedestal to the linear antenna by urging the pedestal. Characteristic display device for portable communication device. 2. The display circuit according to claim 1, further comprising: a driving circuit that rectifies and outputs an AC signal supplied through the pedestal, and a plurality of light emitting diodes that emit light of different colors according to an output of the driving circuit. The display device for a portable communication device according to claim 1, wherein: 3. The driving circuit includes a rectifying diode for rectifying the AC signal, and a smoothing capacitor for smoothing an output of the rectifying diode and driving the light emitting diode to emit light. The display device for a portable communication device according to claim 2.