JP3067620U - Light emitting display for mobile phone - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a display device for visually informing a user of a state when a portable telephone enters a call incoming state or a call state. A portable telephone is connected to a pair of rectifying diodes (14) connected in the opposite direction via an inductor (13) to an end of an antenna and to a light emitting element (16) between the other ends. The state in which the transmitting device transmits the carrier wave can be notified by lighting of the light emitting element.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a light-emitting display device for a mobile phone, and more particularly to a device capable of visually displaying a call reception state or a call state of the mobile phone.

[0002]

[Prior art]

 Mobile phones allow users to make calls over a wireless line, which makes it convenient for telephone users to move freely wherever they move without being restricted to a specific location, but generates a ring tone when a call arrives Doing so may be inconvenient.

[0003]

[Problems to be solved by the invention]

 In a conventional mobile phone, when a call is received, a ringing tone is generated to visually notify the user of the occurrence of the call. When you are in a place where it should not be released to the surroundings (for example, when you are in a music venue), it is used so that turning off the mobile phone does not generate a ringing tone. ing.

[0004] However, even if the user of the mobile phone needs to receive a call even in such a place, it is practically inconvenient that the calling function of the mobile phone cannot be used.

In consideration of this point, a display device for a mobile phone having a simple configuration capable of visually notifying a mobile phone user that a call has been made in consideration of this point has been proposed in Utility Model Registration No. 3007220. Have been.

The present invention intends to propose a light emitting display device for a mobile phone, which further improves the luminous efficiency.

[0007]

[Means for Solving the Problems]

 In order to solve such a problem, in the present invention, in a portable telephone 1 for transmitting and receiving a transmission / reception signal in a wireless manner via an antenna 3, an inductor 13 connected to a tip of the antenna 3 and a tip of the inductor 13 First and second rectifying diodes 14A and 14B connected in opposite directions, and first and second conductive diodes connected to the other ends of the first and second rectifying diodes 14A and 14B, respectively. The legs 15A and 15B and the light emitting element 16 connected between the first and second conductive legs 15A and 15B are provided.

When the portable telephone 1 is in a call incoming state or a call state and a carrier is transmitted from the transmitting device to the wireless line via the antenna 3, the high frequency signal generated by the antenna 3 is increased by the inductor 3. At the same time, the light is rectified by the rectifying diodes 14A and 14B and supplied to the light emitting element 16 through the pair of conductive legs 15A and 15B.

At this time, the light emitting element 16 emits light more brightly by the provision of the inductor 3, so that the user can visually recognize with high sensitivity that the portable telephone has entered the ringing state or the transmitting / receiving state. Can be.

[0010]

[Embodiment of the invention]

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1 (C), reference numeral 1 denotes a portable telephone as a whole, and an antenna 3 is pulled out of the case 2 as needed at a right side position of a longitudinal end face of a rectangular parallelepiped case 2. It is installed so that it can be pushed in.

When the antenna 3 is coupled to the wireless communication line, the user of the portable telephone 1 operates the push key 4 provided at the center of the surface of the case 2 to communicate with the telephone number of the telephone number input. At the same time, the contents of a call are transmitted via a transmitting device provided inside the transmitting hole 5 and the contents of the call transmitted from the other party are connected to the antenna 3 in the case 2 and the receiving hole 6 The receiver can receive a call from a receiver provided inside.

In this case, the antenna 3 functions as a whip antenna, and the light-emitting display device 7 is mounted at the tip thereof.

As shown in FIG. 1A, the light-emitting display device 7 has a rectangular printed circuit board 12 connected to a distal end of the antenna 3 via a connector 11 fixed by, for example, soldering.

An inductor 13 having one end connected to the antenna 3 is mounted on the lower end of the printed circuit board 12, and the other end of the inductor 13 includes a pair of diodes 14 A and 14 B therein. A block 14 is attached.

As shown in FIG. 1B, the diode block 14 has a configuration in which one end of a pair of rectifying diodes 14A and 14B formed of a shot key diode are connected in opposite directions (one rectifying diode 14A). And the other ends of the Schottky diodes 14A and 14B extend substantially parallel to the tip direction, respectively, and have a length of several mm. ] Are connected to a pair of conductive legs 15A and 15B formed of a printed wiring layer having a length.

A light-emitting diode (LED) 16 as a light-emitting element attached to the front end of the printed circuit board 12 is connected to the ends of the conductive legs 15A and 15B, and thus a pair of conductive layers is provided via a pair of diodes 14A and 14B. When a DC current is supplied to the legs 15A and 15B, the light emitting diode 16 can be turned on at the position of the tip of the light emitting display device 7, that is, at the position of the tip of the antenna 3.

In the case of this embodiment, the connector 11 constituting the light-emitting display device 7, the interactor 13 mounted on the printed board 12, the diode block 14, the conductive legs 15A and 15B, and the light-emitting diode 16 as a whole It is sealed in a container 17 made of a transparent resin, for example, by injection molding.

In the above configuration, an equivalent circuit around the antenna 3 when the portable telephone 1 transmits a transmission signal to the wireless communication line will be considered. As shown in FIG. 2B, the stray capacitances C1 and C2 between the conductive legs 15A and 15B and the distal end portion of the antenna 3, and the stray capacitances C1 and C2 between the conductive legs 15A and 15B and the root side portion of the antenna 3 respectively. Considering that there are stray capacitances C3 and C4 between the conductive legs 15A and 15B and stray capacitance C5 between the conductive legs 15A and 15B, power is supplied from the transmitting device 21 provided in the case 2 to the power supply terminal 22 of the antenna 3. The carrier wave generates a high-frequency voltage v on the antenna 3 as shown in FIG. 2A, and a high-frequency current flowing according to the high-frequency voltage v emits a radio wave.

At this time, the effective length of the antenna 3 is determined from the position of the tip including the pair of conductive legs 15 A and 15 B of the light emitting display device 7, that is, from the position where the light emitting diode 16 is provided to the power supply terminal 22. In the case where the effective length of the antenna 3 is そ れ wavelength or less, as shown in FIG. It is considered that the value of the voltage v1 is distributed so as to increase toward the tip when the feeding point 22 is set as a reference (v = 0).

That is, when looking at the value of the voltage v generated with reference to the feeding point 22 (l = 0, v = 0), the antenna 3 between the feeding point 22 and the inductor 13 mainly includes the antenna 3 And the stray capacitances C3 and C4, and a high-frequency voltage v is obtained which relatively increases relatively slowly from the voltage at point a on the root side to the voltage at point b on the tip side. Can be

On the other hand, since the inductor 13 has a large inductor in a short period of time between the root end and the tip of the inductor 13, it is mainly determined by the large inductor and the stray capacitances C 1 and C 2, and A high-frequency voltage v is obtained such that the voltage rapidly increases in the direction toward the tip.

On the other hand, the diodes 14A and 14B, the conductive legs 15A and 15B, and the light emitting diode 16 connected to the tip of the integrator 13 mainly include the inductance of each part and the stray capacitances C3, C4 and C5. , And a high-frequency voltage v having a relatively small change is obtained.

Therefore, at the tip end of the inductor 13 to which the pair of diodes 14A and 14B are connected, a high-frequency voltage that slowly increases from the feed point 22 to the antenna 3 and a high-frequency voltage that rapidly increases by the inductor 13 are provided. A summed value of the high frequency voltage is obtained, which is rectified by the diodes 14A and 14B and applied as a DC voltage between the conductive legs 15A and 15B. Thus, while the high-frequency voltage v is positive, a rectified DC current flows through the diode 14A and further through the conductive leg 15A to the light emitting diode 16, and during the negative period through the diode 14B and further through the conductive leg 15B. A rectified DC current flows through the light emitting diode 16.

When the equivalent circuit of FIG. 2 is rewritten from the viewpoint of causing the light emitting diode 16 to emit light, it can be considered that two ordinary voltage doubler rectifier circuits are overlapped as shown in FIG.

That is, the high-frequency power supply vb (high-frequency potential difference between the point b near the inductor 13 on the antenna 3 and the conductive legs 15A and 15B) is detected and rectified by the diodes 14A and 14B, and added to the stray capacitance C1. A voltage is generated, and a negative voltage is generated in the stray capacitance C2, thereby obtaining a voltage doubled rectified voltage in the stray capacitance C5 and causing the light emitting diode 16 to emit light.

The high-frequency power supply va (high-frequency potential difference between the point a near the feed point 22 on the antenna 3 and the conductive legs 15A and 15B) is detected and rectified by the diodes 14A and 14B, and the floating capacitance C3 Then, a positive voltage is generated at the same time, and a negative voltage is generated at the stray capacitance C4. As a result, a double voltage rectified voltage is obtained at the stray capacitance C5, and the light emitting diode 16 emits light.

As a result, a direct current always flows through the light emitting diode 16 in the forward direction, so that the light emitting diode 16 emits light continuously.

According to an experiment, in a mobile phone of 800 [MHz], when a value of about 50 [nH] was selected as the inductor 13, the luminous intensity of the light emitting diode 16 was further increased. In the case of a 1.5 [GHz] mobile phone, when the inductor 13 having a value of about 10 [nH] was selected, the light emission of the light emitting diode 16 was further increased.

According to the above configuration, when the transmitting device 21 of the portable telephone 1 is in a state of transmitting a carrier wave to the wireless communication line, the high frequency voltage v is distributed to the antenna 3, which is the diode 14 A and the diode 14 A. By being rectified by 14B and flowing to the light emitting diode 16 with a direct current, the light emitting diode 16 is continuously turned on.

In particular, the high-frequency voltage v _L generated at the connection end of the diodes 14A and 14B can be further increased by the inductor 13 inserted between the antenna 3 and the pair of diodes 14A and 14B (corresponding to FIG. 2). By giving the same reference numerals to the portions, and FIG. 4 shows a case where the inductor 13 is not inserted), the luminous intensity of the light emitting diode 16 can be further increased.

In particular, in a mobile phone, when a call is made in a place close to the base station, control is performed so that the emission intensity of the power supply is weakened by a program of the mobile phone itself. In such a case, the brightness of the light emitting diode is increased. However, according to the configuration in which the inductor 13 is provided as described above, it is possible to brightly light even in such a case (up to about 2 to 3 times as compared with the case where the inductor 13 is not inserted). Thus, the luminous sensitivity can be improved.

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

In general, when a call arrives at the portable telephone 1, the portable telephone 1 first transmits a response signal before generating a ringing tone for the incoming call. By the lighting operation of the device 7, the user can know the incoming call before the ringing tone is generated.

In such lighting, the configuration as a whole can be simplified because there is no need to prepare a dedicated power supply for performing the display operation of the light emitting display device 7.

If there is a user carrying the portable telephone 1 with the light emitting display device 7 turned on, a third party can easily know that the user is currently talking.

When the light-emitting display device 7 is applied to a portable telephone 1 already sold, the antenna of the conventional device is simply replaced with the antenna 3 provided with the display device 7 at the tip as shown in FIG. It is not necessary to remodel the device in the case 2 by only the work, and thus it can be safely applied to the conventional portable telephone.

FIG. 5 shows another embodiment of the present invention, in which a film-shaped printed circuit board 31 having a width of about 5 mm and a length of about 30 mm is viewed from one end thereof. The antenna part 32, the inductor 33, the diode block 34, the conductive legs 35A and 35B, and the light emitting diode 36 are provided in order toward the other end.

The antenna section 32 extends in a rectangular shape along the longitudinal direction of the sheet-shaped printed circuit board 31 formed of a printed wiring layer, and a part of a chip-shaped inductor 33 is connected to the other end. In addition, the other end of the inductor 33 is connected to a common connection end of a diode block 34 composed of a pair of diodes connected in antiparallel to each other.

The other ends of the pair of diodes of the diode block 34 are connected to conductive legs 35 A and 35 B, which are printed wiring layers and extend in the longitudinal direction of the printed circuit board 31 in parallel with each other. The light emitting diode 36 is connected between the legs 35A and 35B.

The printed board 31 is housed in an envelope 37 made of a transparent sheet as a whole, thus forming a flat tag-shaped light-emitting display device 38.

In the above configuration, as shown in FIG. 6, the light-emitting display device 38 includes, for example, an adhesive (double-sided tape) on the upper right side of the case 2 of the portable telephone 1 to which the antenna 3 is attached. Like).

When the antenna 3 emits a radio wave, the radio wave is coupled to the antenna unit 32 of the light emitting display device 38 and equivalently serves as a high-frequency signal source of the light emitting display device 38. Similarly, the high-frequency signal is rectified by a pair of diodes of the diode block 34 to cause the light emitting diode 36 to emit light.

At this time, the inductor 33 operates so as to increase the high-frequency voltage abruptly as it goes toward the distal end, so that a rectified voltage large enough to cause the light emitting diode 36 to emit light is supplied to the pair of diode blocks 34. Can be obtained from the diode.

According to the above configuration, in addition to the effects of the above-described embodiment, the light-emitting diode 36 is caused to emit light when the power is emitted by simply attaching the light-emitting display device 38 to the case 2 of the mobile phone 1. This makes it possible to obtain a light-emitting display device 38 that is simple in the task of modifying a mobile phone, such as supporting the antenna 3, is low in cost, and is easy to attach.

In the above-described embodiment, the case has been described in which the light emitting display device 7 is fixed to the distal end portion of the antenna 3 by using the connector 11 with an adhesive material. Even if the connector 11 is detachably mounted by a connecting means such as a screw-in type, the same effect as in the above case can be obtained.

In the above-described embodiment, a case where a colorless and transparent synthetic resin material is used as the container 15 as a whole has been described. Alternatively, a colored (for example, red) transparent synthetic resin material may be used. Alternatively, only the light emitting diode 14 at the tip may be made transparent, and the other part may be made of a non-transparent material so that it can be easily visually confirmed from the outside. In this case, the light-emitting diode 14 constituting the transparent portion at the tip is provided with a convex lens function, so that the light emission luminance to the outside is increased, thereby facilitating visual confirmation from the outside. Anyway.

For example, as shown in FIG. 7, a light emitting display device 38 having the same configuration as that described above with reference to FIG. 5 is made of a flat, vertically long, streamlined, opaque soft resin as a whole. A light-emitting window 42 made of a transparent resin is provided at the light-emitting diode 36 in the envelope 41, and an adhesive layer 43 made of a double-sided tape is provided on the back surface.

The sticking type light emitting display device 44 having the above-described configuration is similar to the light emitting display device 38 described above with reference to FIG. The light emission operation is performed according to the operation.

When the sticking type light emitting display device 44 is attached to the case 2 in this manner, the envelope 41 has flexibility as a whole, so that even if there are some irregularities in the case 2, it is adapted to this. As a result, the envelope 41 can be firmly attached to the case 2.

In the above-described embodiment, sufficient sensitivity can be obtained by setting the lengths of the conductive legs 15A and 15B to several mm. What is necessary is just to lengthen the length of the conductive legs 15A and 15B as long as the total length does not exceed １ ／ wavelength.

In the above-described embodiment, the light emitting diode 16 is connected between the tips of the conductive legs 15A and 15B. However, instead of this, the light emitting diode 16 is connected further forward than the connection end of the light emitting diode 16. By extending the legs 15A and 15B, the light emitting diode 16 may be connected in the middle of the conductive legs 15A and 15B, and as a result, the sensitivity may be increased. Incidentally, even in this case, since the basic operation is the same as in the case of FIG. 1, the same operation and effect as in the above-described case can be obtained.

Further, in the above-described embodiment, the case where the display of the light emitting diode 4 is used together with the ringing sound at the time of incoming call is described, but the ringing sound may be omitted instead. good.

In the above-described embodiment, the container 15 is sealed by injection molding. Alternatively, the same effect as in the above case can be obtained by using a tube structure.

[0055]

[Effect of the invention]

 As described above, according to the present invention, a light emitting element is connected to the other end of a pair of rectifying diodes connected in the opposite direction via an inductor at the tip of the antenna, so that the portable telephone can be used. It is possible to easily realize a light-emitting display device that can visually notify the user of the incoming call state or the call state with high sensitivity.

[Brief description of the drawings]

FIGS. 1A, 1B and 1C are a partial perspective view, an equivalent circuit diagram and a perspective view showing a light emitting display device according to the present invention and a portable telephone using the same.

FIGS. 2A and 2B are a voltage intensity waveform diagram and an equivalent circuit diagram for explaining the operation of the light emitting display device.

FIG. 3 is a circuit diagram showing an equivalent circuit in light emission operation.

FIG. 4 is an equivalent circuit diagram showing an equivalent circuit when no inductor is provided.

FIG. 5 is a perspective view showing a light emitting display device according to another embodiment.

6 is a perspective view showing a use state in which the light emitting display device of FIG. 5 is attached to a case of a mobile phone.

FIGS. 7A, 7B, 7C, and 7D are a perspective view, a front view, a right side view, and a bottom view showing another embodiment of the sticking type light emitting display device. .

[Explanation of symbols]

1 ... portable telephone, 2 ... case, 3 ... antenna,
4 ... Push key, 5 ... Transmission hole, 6 ... Reception hole,
7, 38 ... light-emitting display device, 11 ... connector, 12,
31 ... printed circuit board, 13, 34 ... diode block, 15A, 15B, 35A, 35B ... conductive leg,
14, 36 ... light emitting diode, 15 ... container, 32 ...
... antenna section.

Claims (2)

[Utility model registration claims] 1. A mobile phone for transmitting and receiving signals in a wireless manner via an antenna, wherein an inductor connected to a tip of the antenna and one end of the inductor are connected to the tip of the inductor in opposite directions. First and second rectifying diodes, first and second conductive legs respectively connected to the other ends of the first and second rectifying diodes, and the first and second conductive legs. A light-emitting display device for a mobile phone, comprising: a light-emitting element connected between legs. 2. A portable telephone for transmitting and receiving signals in a wireless manner via an antenna, comprising: a sheet-like substrate; and a high-frequency signal provided on the sheet-like substrate and coupled to radio waves emitted from the antenna. And an inductor provided on the sheet-shaped substrate and connected to a tip of the antenna, and an end provided on the sheet-shaped substrate and having one end at the tip of the inductor so as to be in opposite directions to each other. Are connected to the first and second rectifying diodes, and the first and second conductive elements provided on the sheet-like substrate and connected to the other ends of the first and second rectifying diodes, respectively. A light-emitting display device for a mobile phone, comprising: a leg; and a light-emitting element provided on the sheet-like substrate and connected between the first and second conductive legs.