JP3007220U - Mobile phone display device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To propose a display device for visually notifying a user of a mobile phone when the mobile phone is in a ringing state or a call state. [Structure] By connecting a pair of rectifying diodes 12 connected in reverse direction to the tip of an antenna and connecting a light emitting element 14 between the other ends, a transmitter of a mobile phone transmits a carrier wave. The transmitted state can be notified by turning on the light emitting element.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a display device for a mobile phone, and more particularly to a display device for a mobile phone, which is capable of visually displaying a call incoming or call status.

[0002]

[Prior art]

 Mobile phones have the convenience of being able to talk over a wireless line, allowing the user to make a call wherever they want, without being constrained to a particular place, but at the same time, a ring tone sounds when a call arrives. Doing so may be inconvenient.

[0003]

[Problems to be solved by the device]

 In conventional mobile phones, when a call arrives, a ring tone is generated to alert the user that a call has occurred. If you are in a place where it should not be released into the surroundings (for example, when you are in a music venue), turn off the power of the mobile phone to prevent the ringing tone from being generated. ing. However, it is practically inconvenient that the call function of the mobile phone cannot be used even when the mobile phone user needs to receive a call even in such a place.

The present invention has been made in consideration of the above points, and provides a display device for a mobile phone having a simple structure capable of visually notifying a mobile phone user that a call has been made. It is a proposal.

[0005]

[Means for Solving the Problems]

 In order to solve such a problem, according to the present invention, in a portable telephone 1 that transmits and receives a transmission / reception signal via an antenna 3 in a wireless manner, first and first antennas connected to the tip of the antenna 3 in opposite directions. Two rectifying diodes 12A, 12B, first and second conductive legs 13A, 13B connected to the other ends of the first and second rectifying diodes 12A, 12B, respectively, and first and second And the light emitting element 14 connected between the conductive legs 13A and 13B.

[0006]

[Action]

 When the mobile phone 1 enters the ringing state or the calling state and the carrier transmits the carrier wave to the wireless line through the antenna 3, the high frequency current distributed on the antenna 3 is supplied to the rectifying diodes 12A and 12B. Therefore, the light is rectified and applied to the light emitting element 14 through the pair of conductive legs 13A and 13B. At this time, the light emitting element 14 emits light, so that the user can visually know that the portable telephone is in a call incoming state or a transmitting / receiving state.

[0007]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1C, reference numeral 1 denotes a mobile phone as a whole, and an antenna 3 can be pulled out from the case 2 or pushed in the side surface of the rectangular parallelepiped case 2 in the longitudinal direction. It is installed so that

Thus, by coupling the antenna 3 to the wireless communication line, the user of the mobile phone 1 operates the push key 4 provided at the center of the case 2 to communicate with the other party of the phone number entered. The contents of the call are transmitted via the transmitter device provided inside the transmission hole 5, and the contents of the call transmitted from the other party are connected to the antenna 3 in the case 2 and provided inside the reception hole 6. It is designed to be able to receive from the existing receiver.

In this case, the antenna 3 functions as a whip antenna, and the display device 7 is attached to the tip thereof. In the display device 7, as shown in FIG. 1A, a diode portion 12 is connected to the tip of the antenna 3 through a connector 11 fixed by, for example, an adhesive material.

As shown in FIG. 1B, the diode section 12 has a structure in which one ends of a pair of rectifying diodes 12A and 12B, which are Schottky diodes, are connected in opposite directions to each other. The anode and the cathode of the other rectifying diode 12B are connected to each other), and the other ends of the Schottky diodes 12A and 12B respectively extend in the front end direction substantially in parallel and have a length of several mm. It is connected to a pair of conductive legs 13A and 13B of length.

A light emitting diode (LED) 14 as a light emitting element is connected to the tip end position between the conductive legs 13A and 13B, and thus the pair of conductive legs 13A and 13B is connected via the pair of diodes 12A and 12B. When a direct current is supplied to the light emitting diode 14, the light emitting diode 14 can be turned on at the tip position of the display device 7, and hence at the tip position of the antenna 3.

In the case of this embodiment, the connector 11, the diode member 12, the conductive legs 13A and 13B, and the light emitting diode 14 which constitute the display device 7 are formed by, for example, injection molding in a container 15 which is entirely made of transparent resin. It is sealed. Considering the equivalent circuit when the portable telephone 1 is in the state of transmitting the transmission signal to the wireless communication line in the above configuration, it is provided in the case 2 as shown in FIG. 2 (B). The radio wave is emitted by the high frequency current i generated on the antenna 3 by the carrier wave fed from the transmitting device 21 to the feeding terminal 22 of the antenna 3.

At this time, the effective length of the Annatte 3 is from the tip position of the display device 7 including the pair of conductive legs 13 A and 13 B, that is, from the position where the light emitting diode 14 is arranged to the power supply terminal 22. It can be considered to be the length, and when the effective length of the antenna 3 is ¼ wavelength or less, the value of the high frequency current i becomes the minimum at the tip as shown in FIG. 2 (A). It is thought to be distributed as follows.

Accordingly, since the high frequency current i corresponding to the distance from the light emitting diode 14 is distributed at the tip position of the antenna 3 to which the pair of diodes 12A and 12B are connected, during the positive period thereof. A rectified direct current flows to the light emitting diode 14 through the diode 12A and further through the conductive leg 13A, and a rectified direct current flows to the diode 14 through the diode 12B and further through the conductive leg 13B during its negative period.

As a result, a direct current always flows in the light emitting diode 14 in the forward direction, so that the light emitting diode 14 continuously emits light. Here, the frequency of the radio wave actually used in the mobile phone 1 is around the 800 [MHz] band, so that the length of the conductive legs 13A and 13B can be made sufficiently short in practical use, and the transmission power is 0.6-. The relatively large size of about 1 [W] allows the light emitting diode 14 to stably emit light. As a result, the size of the display device 7 can be selected to be an appropriate size in view of the size balance of the mobile phone 1 with respect to the case 2.

According to experiments, the length of the conductive legs 13A and 13B is selected to be 3 to 20 [mm], preferably about 7 [mm], and the antenna 3 is put in and taken out of the case 2. The light-emitting diode 14 could be stably and continuously lit without any hindrance to the operation or the user's conversation operation.

According to the above configuration, when the transmitter 21 of the mobile phone 1 is in the state of transmitting the carrier wave to the wireless communication line, the high frequency current i is distributed in the antenna 3, which is the diode 12A and the diode 12A. The light-emitting diode 14 is continuously lit by being rectified by 12B and flowing to the light-emitting diode 14.

Therefore, the user of the mobile phone 1 can know that the mobile phone 1 is in the transmission state by visually reading that the display device 7 has performed the display operation, and as a result, As a result, the mobile phone 1 can be used more safely.

Incidentally, in general, when a call arrives at the mobile phone 1, the mobile phone 1 first transmits a response signal before the ringing tone of the incoming call is generated. At the time of transmitting the response signal, the display device The lighting operation of 7 allows the user to know the arrival of a call before the ringing tone is generated.

Since such lighting is performed, it is not necessary to prepare a dedicated power source for performing the display operation of the display device 7, so that the entire configuration can be simplified. Also, if there is a user carrying the mobile phone 1 whose display device 7 is lit, a third party can easily know that the user is currently in a call.

When the display device 7 is applied to the mobile phone 1 that has already been sold, the work of simply replacing the antenna of the conventional device with the antenna 3 provided at the tip of the display device 7 as shown in FIG. Therefore, it is not necessary to modify the device in the case 2, and thus it can be safely applied to the conventional mobile phone.

As described above, the light emitting diode 14 is connected to the tip end position of the antenna 3 by the structure in which the light emitting diode 14 is connected to the other ends of the pair of diodes 12 A and 12 B reversely connected to the tip end of the antenna 3. The principle of being able to emit light with has been confirmed by experiments as follows.

First, as described above with reference to FIG. 2A, in order to cause the light emitting diode 14 to emit light at the tip of the antenna 3, paying attention to the high frequency current i distributed when the antenna 3 is in the transmitting state. As shown in FIG. 3, when the light emitting diode 14 was connected to the full-wave rectifying bridge composed of the four diodes 12A to 12D, it was found that the light emitting diode 14 was continuously lit.

However, in the first experimental device of FIG. 3, it is necessary to provide the antenna member 3B at the tip of the full-wave rectification circuit, and thus the light emitting diode 14 cannot emit light at the true tip position of the antenna 3. It was inconvenient.

In order to improve this, next, as a second experimental device, as shown in FIG. 4, a light emitting diode 14 is provided by a pair of conductive legs 13A and 13B provided along the antenna member 3B. When it was pulled out from the antenna member 3B to the tip position, the light emitting diode 14 was continuously lit.

By the way, considering an equivalent circuit for the high-frequency current i in the second experimental apparatus of FIG. 4, as shown in FIG. 5, the stray capacitance C0 between the pair of conductive legs 13A and 13B and the conductive leg 13A. And the stray capacitances C1 and C2 between the antenna member 3B and the antenna member 3B are considered to be distributed between the antenna member 3B and the conductive legs 13A and 13B.

In particular, considering the stray capacitance existing between both ends of the light emitting diode 14, the high frequency current i rectified by the diodes 12A and 12B is smoothed by the stray capacitance between the both ends and the light emitting diode is It is considered that a DC voltage is generated that excites both ends of 14 in the forward direction.

Considering in this way, the reverse bias voltage is constantly applied to the diodes 12C and 12D that form a part of the full-wave rectification bridge, so that the high-frequency current i is either positive or negative. However, it is considered that the reverse bias is always applied.

Therefore, by omitting the diodes 12C and 12D and the antenna member 3B, a display device 7 as shown in FIGS. 1A and 1B in which the light emitting diode 14 is continuously lit is obtained.

In the above-mentioned embodiment, the case where the display device 7 is fixed to the tip of the antenna 3 with the adhesive using the connector 11 has been described, but instead of this, the antenna 3 and Even if the connector 11 is detachably mounted by means of, for example, a screwing type coupling means, the same effect as in the above case can be obtained.

Further, in the above-mentioned embodiment, the case where the container 15 is made of the colorless and transparent synthetic resin material as a whole has been described, but instead of this, a colored (for example, red) transparent synthetic resin material may be used. It is also possible to make only the portion of the light emitting diode 14 at the tip transparent and make the other portion of the tip from a non-transparent material so that it can be easily visually confirmed from the outside. In this case, the light emitting diode 14 forming the transparent portion at the tip has a convex lens function to enhance the luminance of light emitted to the outside, thereby facilitating visual confirmation from the outside. good.

In the above-mentioned embodiment, the length of the conductive legs 13A and 13B is selected to be several [mm] so that practically sufficient sensitivity can be obtained. Basically, the length of the conductive legs 13A and 13B may be increased within a range in which the total length of the antenna 3 does not exceed 1/4 wavelength.

Further, in the above-described embodiment, the light emitting diode 14 is connected between the tips of the conductive legs 13A and 13B, but instead of this, the conductive legs are provided further ahead of the connection end of the light emitting diode 14. The light emitting diode 14 may be connected in the middle of the conductive legs 13A and 13B by extending 13A and 13B, and as a result, the sensitivity may be increased. Even in this case, the basic operation is the same as in the case of FIG. 1, so that the same effect as the above case can be obtained.

Further, in the above-mentioned embodiment, the case where the display of the light emitting diode 14 is used together with the ringing tone at the time of incoming call is described, but instead of this, the ringing tone may be omitted. good. Further, in the above-described embodiment, the container 15 is sealed by injection molding, but instead of this, a tube structure can also obtain the same effect as in the above case.

[0036]

[Effect of device]

 As described above, according to the present invention, the light emitting element is connected to the other end of the pair of rectifying diodes reversely connected to the tip of the antenna, so that the portable telephone is in a ringing state or a call. It is possible to easily realize a display device capable of visually notifying the user that the condition is present.

[Brief description of drawings]

1 (A), (B) and (C) are a partial perspective view, an equivalent circuit diagram and a perspective view showing a display device according to the present invention and a mobile phone using the same.

2A and 2B are a signal waveform diagram and an equivalent circuit diagram for explaining the operation of the display device.

FIG. 3 is a circuit diagram showing an equivalent circuit of a first experimental device manufactured until reaching the present invention.

FIG. 4 is an equivalent circuit diagram showing an equivalent circuit of a second experimental device.

5 is an equivalent circuit diagram provided for consideration of an equivalent circuit of the second experimental device in FIG.

[Explanation of symbols]

1 ... mobile phone, 2 ... case, 3 ... antenna,
4 ... Pushkey, 5 ... Transmission hole, 6 ... Reception hole, 7
...... Display device, 11 ...... Connector, 12 ...... Diode part, 13A, 13B ...... Conductive leg, 14 ...... Light emitting diode, 15 ...... Container.

Claims (4)

[Scope of utility model registration request] 1. A portable telephone for transmitting and receiving a transmission / reception signal through an antenna in a wireless manner, wherein first and second rectifying terminals are connected to opposite ends of the antenna in opposite directions. A diode, first and second conductive legs respectively connected to the other ends of the first and second rectifying diodes, and a light emitting element connected between the first and second conductive legs A display device for a mobile phone, comprising: 2. The display device for a mobile phone according to claim 1, wherein the light emitting element is connected to tip positions of the first and second conductive legs. 3. The display device for a mobile phone according to claim 1, wherein the light emitting element is connected to an intermediate position of the first and second conductive legs except for the tip end portions thereof. 4. The first and second conductive legs are 3 to 20 [m
The display device for a mobile phone according to claim 1, 2 or 3, wherein the display device has a length of m].