JP2003060740A - Cradle for charging of portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cradle for charging of a portable telephone set capable of surely notifying an incoming call with light even while a portable telephone set is mounted on the mounting stand for charging. SOLUTION: This mounting stand for charging of a portable telephone set is provided at least with a means for detecting the fluctuations of a charging voltage of the portable telephone set when an incoming call is received, an emitter such as a LED 84 disposed at a prescribed position of the main body of a mounting stand 1 for charging, and a LED driving circuit 8 for controlling the LED 84 in relation to fluctuations of a charging voltage. The stand uses a fluctuation detecting means formed by combining a resistor 4, a capacitor 5, etc., to detect fluctuations of a charging voltage, amplifies the fluctuations with an amplifier 6, makes the LED 84 flicker and thereby can surely make an incoming call noticed regardless of a simple configuration. Since a power source of the LED 84 is supplied from an AC adapter, light emission intensity can be increased or a plurality of light sources can be provided so as to make it easy to confirm an incoming call.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging stand for a mobile phone.

[0002]

2. Description of the Related Art Mobile phones have come into widespread use, and in particular, recently, mobile phones having functions as a mobile terminal, a camera, and a music reproducing device as well as a phone have been provided. Is becoming. In such a mobile phone, it is necessary to periodically charge the battery, and especially when the mobile phone consumes a large amount of power, the battery is charged by being installed in a charger (charging stand) when not in use. .

[0003]

The mobile phone is equipped with a function of notifying an incoming call by blinking sound or light, vibration, etc., and the user can select the function at any time according to the usage pattern. For example, if you set the mobile phone to the mode that does not ring the ringtone and install the mobile phone on the charging stand as it is, the light-emitting body provided on the mobile phone blinks to notify you of the incoming call. Since the light source installed in the mobile phone is small and the light is weak, it is difficult to recognize the incoming call when the charging stand is not near the user, and the incoming call may not be noticed especially in a bright place.

The present invention has been made in view of the above problems, and its main purpose is to reliably notify an incoming call by light even when a mobile phone is installed on a charging stand. It is to provide a stand for charging a mobile phone that can be used.

[0005]

In order to achieve the above object, the charging stand for a mobile phone according to the present invention comprises means for detecting a change in the charging voltage of the mobile phone at the time of an incoming call, a light emitting body, and the charging. And a means for controlling the light-emitting body in association with a change in voltage.

In the present invention, the fluctuation detecting means is
At least, it is preferably configured by a combination of a resistor and a capacitor.

Further, in the present invention, the luminous body is
It is preferable to include an LED or an EL element.

Further, in the present invention, the luminous body is
A plurality of charging bases may be installed around the charging base.

Further, in the present invention, a mobile telephone which operates in the TDMA system may be installed.

As described above, in the present invention, the charging stand is provided with the means for detecting a minute change in the charging voltage and the means for turning on / off the light emitter in association with the minute change. Therefore, not only the mobile phone but also the charging stand can emit light when receiving an incoming call, and the light source that consumes a large amount of power can be used by supplying the power supply for emitting light from the AC adapter. The user can be surely notified.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In a preferred embodiment of the charging stand for a mobile phone according to the present invention, means for detecting fluctuations in the charging voltage of the mobile phone at the time of an incoming call and a main body for the charging stand are provided. A light-emitting body such as an LED provided at a predetermined position and an LE that controls the LED in association with fluctuations in the charging voltage
A D drive circuit is provided at least, the fluctuation of the charging voltage is detected by using a fluctuation detecting means which is a combination of a resistor and a capacitor, and the fluctuation is amplified to blink the LED provided on the charging stand. By doing so, it is possible to reliably notify the incoming call with a simple configuration. Also, L
Since the power source of the ED is supplied from the AC adapter, the light emission intensity can be increased or a plurality of light sources can be provided, which facilitates confirmation of incoming calls.

[0012]

EXAMPLES Examples of the present invention will be described with reference to the drawings in order to describe the above-described embodiments of the present invention in more detail.

[Embodiment 1] First, a charging stand for a mobile phone according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a circuit diagram showing the configuration of the charging stand according to the present embodiment, FIG. 2 is a circuit diagram showing the configuration of the LED drive circuit, and FIG. 3 is a signal waveform at each point in the charging stand. It is a figure. Further, FIG. 4 is a perspective view showing an example of the external appearance of the charging stand according to the present embodiment.
[Fig. 3] is a diagram showing functions of a mobile phone.

First, the structure of the charging stand of this embodiment will be described with reference to FIG. The charging stand 1 is AC
It has a connection terminal 2 connected to the adapter and a connection terminal 3 that comes into contact with the charging terminal of the mobile phone (charging terminal 91 in FIG. 5). The connection terminal 2 has a (+) terminal 21 and a (−) terminal 22, and the connection terminal 3 has a (+) terminal 31 and a (−) terminal.
And a terminal 32. The (−) terminal 22 and the (−) terminal 32 are connected, and the (+) terminal 21 is connected to the (+) terminal 31 via the resistor 4. The (+) terminal 31 is connected to the amplifier 6 via the capacitor 5,
The output of the amplifier 6 is connected to the comparator 7. Comparator 7
The output of is connected to the drive circuit 8 which drives the LED 84. In addition, the amplifier 6, the comparator 7, the LED drive circuit 8
Is connected to the (+) terminal 21.

FIG. 4 shows an example of the external appearance of the charging stand 1 of this embodiment. When the mobile phone 9 is mounted on the charging stand 1, the current output from the AC adapter is applied to the connection terminal 2,
It is supplied to the mobile phone 9 through the resistor 4 and the connection terminal 3.

Next, the signal waveform at each point inside the charging stand 1 will be described with reference to FIG. 3 when an incoming call is received with the mobile phone 9 installed on the charging stand 1 having the above-mentioned configuration. To do.

First, when there is no incoming call, the current flowing through the point A in FIG. 1 (the input portion of the (+) terminal 31 of the connection terminal 3) is direct current as shown in FIG. Is a charging circuit 92 provided inside the mobile phone 9 (FIG. 5)
Follow the behavior of.

When the mobile phone 9 receives an incoming call, the circuits (reception circuit 93, transmission circuit 94, control circuit 96) inside the mobile phone 9 start operating. Mobile phone 9 is TDMA
In the case of the (Time Division Multiplex Access) system, the operating current is a state (state 1) in which the transmission circuit 94 + reception circuit 93 + control circuit 96 is operating and the reception circuit 93.
In the state where the + control circuit 96 is operating (state 2), two different values are exhibited, and they change in a constant cycle.

For example, in the PDC type mobile phone 9,
(State 1) is repeated at a cycle of 20 ms (or 40 ms). (State 1) is about 7 ms and the current value is about 60
0 mA, (state 2) is about 13 ms (or 33 ms), and the current value is about 50 mA. If the resistance value of the resistor 4 is 0.1Ω, a ripple of 55 mV will be generated at the point A when a call arrives (see FIG. 3B).

When the ripple component passes through the capacitor 5, the DC component is removed, and the ripple component has a waveform as shown in FIG.

Then, the input ripple component is amplified by the amplifier 6
Is amplified by. If the amplification degree of the amplifier 6 is 100 times, the output of the amplifier 6 will be 5.5V (see FIG. 3D).

After this, the amplified signal is input to the comparator 7 having a specific threshold value, and the (state 1) and (state 2) described above are applied.
The signal changes according to the change of. The comparator 7 is mainly intended to remove the amplitude noise component, and the signal output from the comparator 7 has a pulse-like waveform as shown in FIG.

The signal from the comparator 7 is input to the LED drive circuit 8, and the LED drive circuit 8 controls ON / OFF of the LED 84 in synchronization with the output signal of the comparator 7. An embodiment of the LED drive circuit 8 is shown in FIG. Reference numeral 82 is a transistor, 81 is a resistor for limiting the current flowing through the LED 84, and 83 is a resistor for applying a DC bias to the base.

As described above, the charging stand 1 of the mobile phone 9 of this embodiment is a simple combination of the resistor 4, the capacitor 5, etc., for minute fluctuations in the charging voltage in the mobile phone 9 when an incoming call arrives. With such a configuration, the detected signal is amplified and the light emitting means such as the LED 84 installed in the charging stand 1 is blinked. Therefore, it is easier to confirm the incoming call as compared with the conventional configuration in which only the mobile phone 9 is blinked. Becomes

Further, since the power source of the LEDs 84 is supplied from the AC adapter, a large current can be passed to make the LEDs brightly emit light, or the number of the LEDs 84 can be increased, so that the user can be notified of the incoming call more reliably.

In this embodiment, the charging stand 1 has an L
The example in which two ED84s are provided has been described, but the LED8
The number and arrangement of 4 can be set arbitrarily, for example, L
The ED84 is installed around the charging stand 1 so that the blinking of the LED 84 can be confirmed from any position,
A delay circuit may be provided to scan the light by shifting the lighting of each LED 84, or the LEDs 84 may be arranged in a matrix to display characters or figures.

In the above embodiment, the LED 84 is turned on.
Although the case of performing ON / OFF control has been described, the configuration may be such that the light emission intensity is changed, and by constantly turning on the LED, the location of the charging stand can be confirmed especially when it is installed in a dark place. And convenient.

[Embodiment 2] Next, a charging stand for a mobile phone according to a second embodiment of the present invention will be described with reference to FIGS. 6 to 9. FIG. 6 is a circuit diagram showing the configuration of the charging stand according to the second embodiment, and FIG. 7 is a perspective view showing an example of its appearance. In addition, FIG. 8 and FIG.
It is a figure which shows the other structure of an LED drive circuit, FIG. 8 is a circuit diagram, FIG. 9 is a figure which shows an output waveform. It should be noted that the present embodiment describes a variation of the first embodiment.

In the first embodiment, the LED 84 is used as the light emitting means because it is inexpensive and easy to drive, but the light emitting means is not limited to the LED and any light emitting source may be used. You can For example, an EL element that emits light on the surface can be used. The circuit configuration at that time is as shown in FIG. 6, and the EL drive circuit 11 and the EL element 10 are used in place of the LED drive circuit 8 and the LED 84. Further, as for the appearance of the charging stand 1, for example, as shown in FIG. 7, the EL element 10 is provided on the entire side surface of the charging stand 1,
It can be configured to blink the entire stand,
By emitting light in a wide area, an incoming call can be notified more reliably, and the design becomes more excellent.

Further, as the LED drive circuit 8 of the first embodiment described above, as shown in FIG. 8, a capacitor 85 is arranged at the base of the transistor 82 of the LED drive circuit 8 to smooth the input pulse signal. It may be configured to achieve
The current flowing through the LED 84 at this time is
Is smoothed to form a waveform as shown in FIG. 9, and the emission intensity of the LED 84 changes according to this waveform.

In each of the above-mentioned embodiments, the configuration of notifying the incoming call by light is described, but the present invention is not limited to the above-mentioned embodiment, and the sound such as chime or melody is interlocked with the blinking of light. May be made to sound, and the light-emitting body may be made to blink not only when a call is received, but also to be kept blinking for a predetermined time after the call is received.

[0032]

As described above, according to the charging base of the mobile phone of the present invention, when the mobile phone being charged on the charging base receives an incoming call, the charging base is provided on the charging base. Since the light-emitting body (LED, EL element, etc.) can be made to blink, it is possible to make the arrival of an incoming call more prominent. In particular, the effect is great when the mobile phone is set so as not to generate a ring tone.

Further, since the power source of the light emitting source such as the LED or EL element is required for the output of the AC adapter, a large current is passed to make the LED or EL element emit light brightly, or LE
It is possible to increase the quantity of D and improve functionality and design.

Further, since the circuit for detecting the incoming call is only the combination of the resistor and the capacitor, it can be realized at a very low cost.

In recent years, more and more charging stands have excellent design. As one of the design elements of mobile phones, the tip of the antenna is lit,
Something that makes some cases shine has already been commercialized. When considering the evolution of the design of the charging stand, it can be said that incorporating an illuminant into a part of the exterior is one of the most interesting evolutionary forms.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of a charging stand of a mobile phone according to a first embodiment of the present invention.

FIG. 2 is an L of the charging stand according to the first embodiment of the present invention.
It is a circuit diagram which shows the structure of an ED drive circuit.

FIG. 3 is a diagram showing waveforms at respective points of the charging stand according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing an example of the external appearance of the charging stand according to the first embodiment of the present invention.

FIG. 5 is a block diagram showing functions of a mobile phone.

FIG. 6 is a circuit diagram showing a configuration of a charging stand of a mobile phone according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing an example of an external appearance of a charging stand according to a second embodiment of the present invention.

FIG. 8 is an L of the charging stand according to the second embodiment of the present invention.
It is a circuit diagram which shows the structure of an ED drive circuit.

FIG. 9 is an L of the charging stand according to the second embodiment of the present invention.
It is a figure which shows the output waveform of an ED drive circuit.

[Explanation of symbols]

1 Charging stand A few connection terminals 21 (+) terminal 22 (-) terminal 3 connection terminals 31 (+) terminal 32 (-) terminal 4 resistors 5 capacitors 6 amplifier 7 comparator 8 LED drive circuit 81 resistor 82 transistor 83 resistor 84 LED 9 mobile phones 91 Connection terminal 92 Charging circuit 93 Receiver circuit 94 Transmission circuit 95 antenna 96 control circuit 97 batteries 10 EL element 11 EL drive circuit

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04M 1/21 H04M 1/725 1/725 H04B 7/26 YF term (reference) 5G003 AA01 BA01 FA03 5K023 AA07 BB11 HH04 HH08 LL03 MM27 5K027 AA11 BB02 FF03 FF22 HH26 MM16 5K067 AA25 AA41 BB04 CC04 FF19 FF24 FF27 FF31 FF33 KK06

Claims (5)

[Claims] 1. At least a means for detecting a change in charging voltage of a mobile phone at the time of an incoming call, a light emitting body, and a means for controlling the light emitting body in association with the change in the charging voltage. Charging stand for mobile phones. 2. The cradle for charging a mobile phone according to claim 1, wherein the fluctuation detecting means is composed of at least a combination of a resistor and a capacitor. 3. The charging stand for a mobile phone according to claim 1, wherein the light emitting body includes an LED or an EL element. 4. The charging stand for a mobile phone according to claim 3, wherein a plurality of the light emitters are installed around the charging stand. 5. The cradle for charging a mobile phone according to claim 1, wherein a mobile phone that operates in a TDMA system is installed.