JP2001069202A - Light emitting device for communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a light emitting device for communication equipment capable of adopting various designs and also obtaining sufficient luminance. SOLUTION: A battery BT for driving is set to a battery holding part 21 of a circuit part 20 while an exterior package 40 is removed. A thin string 30 acting as an antenna is attached to a hole for mounting of a portable telephone main body. When radio waves are transmitted from the antenna of the portable telephone side, a part of the radio waves is detected by the string 30. This signal is supplied to a circuit part 20. In the part 20, the direct current power of the battery BT is converted into alternating current power based on the detection of the radio waves and further boosted to be supplied to an EL element 10. Thus, the element 10 is made to emit light and notifies that an incoming call comes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a portable telephone and a PHS
And a light emitting device for communication equipment such as

[0002]

2. Description of the Related Art For example, in a mobile phone, a radio wave is output from an antenna not only at the time of calling but also at the time of receiving a call. Therefore, by detecting this radio wave and driving a light emitting diode or the like, the user can know that there is an incoming call. Various types of such light emitting devices for communication devices have already been proposed and put into practical use, but all use light emitting diodes as light emitting means. In addition, many use electric waves transmitted from antennas of mobile phones as power sources.

However, since the light emitting diode emits light at a point, it is monotonous in design. Further, depending on the means for detecting the radio wave transmitted from the antenna of the mobile phone, there is also a disadvantage that the driving power is insufficient and the light cannot be emitted with good luminance. The present invention focuses on this point, and it is an object of the present invention to provide a light emitting device for a communication device that enables a variety of designs and provides sufficient luminance.

[0004]

In order to achieve the above object, the present invention is characterized in that an EL element is used as a light emitting means. According to the main aspect, a radio wave detecting means for detecting a radio wave transmitted from an antenna of a communication device; an EL element which emits light when a drive voltage is applied; Driving means for applying a driving voltage.

According to another aspect, a plurality of the EL elements are provided. Alternatively, the invention is characterized in that the EL element doubles as a strap or protector of the communication device. According to still another aspect, the driving unit includes:
Detecting means for detecting the output of the radio wave detecting means; switching means for switching DC power supply based on a detection signal from the detecting means; inverter means for converting DC supplied by the switching means into AC. It is characterized by having.

According to another aspect, the radio wave detecting means, E
An L element and the driving means are provided near a main body of the communication device. Alternatively, the radio wave detecting means,
An EL element and the driving means are provided in a housing of the communication device. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

[0007]

Embodiments of the present invention will be described below in detail. Embodiment 1 FIG. 1 (A) shows a main part of Embodiment 1 of the present invention, in which a fiber EL (electroluminescence) element 10 is used as a light emitting means. Many EL elements 10 are attached to the circuit section 20. The circuit unit 20 detects the transmission of the radio wave from the antenna of the mobile phone, and turns on the EL element 10 based on the detection result. A thin string 30 for attaching the present apparatus to a mobile phone body is attached to the circuit section 20. In the present embodiment, the thin string 30 functions as an antenna. The circuit part 20 is covered with an exterior 40.

[0008] Of the above-mentioned components, the EL element 10 is, as is well known, a material in which a luminescent substance is dispersed in plastic or the like. In the present embodiment, an element that emits light in a fiber shape is used.

Next, the circuit section 20 incorporates a circuit as shown in FIG. 2, for example. In the figure, the thin string 30 acting as the above-mentioned antenna is connected to the input side of the voltage doubler detection circuit 22. An output side of the voltage doubler detection circuit 22 is connected to an oscillation circuit 26 via a switching circuit 24. Further, the output side of the oscillation circuit 26 is connected to the EL element 10 via a booster circuit 28.

More specifically, the voltage doubler detection circuit 2
Numeral 2 is composed of a capacitor C1 and diodes D1 and D2, and is configured to detect a signal received by the antenna, which is the thin string 30, with a double voltage. The switching circuit 24 includes capacitors C2 and C3, a transistor Q1, and a battery BT. The transistor Q1 performs a switching operation according to the detection output of the voltage doubler detection circuit 22. As a result, switching of the output of the battery BT with respect to the oscillation circuit 26 is performed. As the battery BT, for example, a button battery is used.
As shown in (A), it is attached to a battery holding part 21 provided in a housing of the circuit part 20.

The oscillating circuit 26 functions as an inverter and includes a transistor Q2, a capacitor C4, an electric field capacitor C5, and resistors R1 and R2. The oscillating circuit 26 converts DC power supplied from the switching circuit 24 into AC power. Things. The booster circuit 28 is configured by a transformer T, which boosts the input AC voltage, and has an output side connected to the EL element 10.

Returning to FIG. 1, the thin string 30 is made of, for example, a covered conductor so as to function also as an antenna for detecting a radio wave transmitted from a mobile phone.
The exterior 40 is formed of, for example, a resin material, and has an appropriate shape such as a character. E in the circuit section 20
When the L element 10 and the thin string 30 are attached, the state becomes as shown in FIG. 1A, and when the exterior 40 is further attached, the state becomes as shown in FIG. 1B. As described above, the EL element 10 functions as a strap of a mobile phone. E for mobile phone
At the time of mounting the L element 10, a housing having a considerable strength is used as the circuit unit 20 in order to secure a considerable strength.
An appropriate method such as resin molding of the entire circuit unit 20 is used.

The EL element 10 has a ring shape as shown in FIG.
Various shapes may be used. In addition, the number of the EL elements 10 may be one or plural. When a plurality of color filters are used, they may be either a single color or a plurality of colors. Further, the replacement of the battery BT is performed by moving the exterior 40 in the direction of the thin string 30 so that the battery holding unit 21 of the circuit unit 20 can be seen.

FIG. 3 shows a state in which the light emitting device having the above-described configuration is attached to a mobile phone. As shown in the figure,
The thin string 30 is attached to the attachment hole 52 of the main body of the mobile phone 50. In this state, when there is a call or a call response on the mobile phone 50 and a radio wave is transmitted from the antenna 54,
A part of this radio wave is detected by the thin string 30. This signal is
The output is detected by the voltage doubler detection circuit 22 of the circuit section 20, and the output of the battery BT is switched by the switching circuit 24 based on the detection result. That is, when radio waves are transmitted from the mobile phone 50, DC power is supplied from the battery BT to the oscillation circuit 26. In the oscillation circuit 26, the input DC power is converted into AC power, which is boosted by the booster
It is supplied to the element 10. Thereby, the EL element 10 emits light.

As described above, according to the present embodiment, the mobile phone 5
When there is a transmission or an incoming call response at 0, the EL element 10 constituting the strap emits light as a whole. Therefore, for example, a considerable luminance can be obtained as compared with the case where the light emitting diode emits light, and the incoming call can be clearly confirmed. In addition, it is possible to obtain a strap with a novel design that emits light of various colors that emits light as a whole.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the light emitting device of the present invention is applied to a protector of a display surface of a mobile phone, and FIG. 4A shows a front view and FIG. 4B shows a side view. FIG. 5 is an exploded view of each part.

In these figures, a protector 100 for protecting a display surface of a mobile phone and a circuit section 102 for emitting an EL element are mounted on upper and lower frames 104 and 106 so as to be substantially parallel to each other. Of these, the protector 100 is usually constituted by a transparent EL element. The circuit unit 102 has the same configuration as that of FIG.
The circuit board on which the L drive circuit is formed is housed in an appropriate case, so that the protector 100 emits light at the time of calling and answering a call. Upper and lower frame 1
Reference numerals 04 and 106 each have a shape into which the body of the mobile phone 110 can be fitted, and are made of, for example, an elastic resin. Further, the upper frame 104 is provided with an antenna 105 along the upper frame 104. The EL element terminals of the protector 100 are guided to the circuit section 102 together with the antenna 105 along the upper and lower frames 104 and 106 (not shown).

Next, the operation of the present embodiment will be described. When a radio wave is output from the antenna 112 of the mobile phone 110, this is detected by the antenna 105 provided along the upper frame 104. Then, the EL element is driven in the same manner as in the first embodiment, and the protector 100 is driven.
Emits light. In the present embodiment, the protector 1
Instead of 00, one or both of the upper and lower frames 104 and 106 may include an EL element, or the upper and lower frames 104 and 106 may be formed of EL elements.

Third Embodiment Next, a third embodiment of the present invention will be described. In this embodiment, EL elements are provided on the top and side surfaces of a mobile phone.
FIG. 6 shows a state at the time of attachment. In the figure, the light emitting unit 150 is formed in a substantially U-shape that covers a side surface from the top of the mobile phone 190. This light emitting unit 150
Is made of, for example, a PVC sheet, has a structure in which a fiber-like EL element 152 and an antenna 154 are housed inside, and a peripheral end is sealed by a method such as welding.

The double-sided adhesive tape 156 is provided inside each of the feet of the light emitting section 150. Light emitting unit 1
A circuit section 160 is provided on the top of 50. The circuit section 160 has a configuration in which a circuit board on which an EL drive circuit having the same configuration as that of FIG. 2 described above is formed is accommodated in an appropriate case. Drives light emission. Light emitting unit 150 described above
The EL element 152 and the antenna 154 of this circuit section 1
60 respectively. The circuit section 160 is also provided with a double-sided adhesive tape 162.

FIG. 7 shows a side view of a state in which the light emitting device of the present embodiment is attached to a portable telephone. Light emitting unit 1
50 is attached so as to sandwich the mobile phone 190 from the top side to the side by its U-shape. Light emitting unit 1
The light emitting unit 150 is adhesively fixed to the mobile phone 190 by the double-sided adhesive tape 156 on the inside of both feet 50. Further, the circuit section 160 is bent to the back side of the mobile phone 190 and is adhesively fixed to the mobile phone 190 with a double-sided adhesive tape 162.

Next, the operation of the present embodiment will be described.
When a radio wave is output from the, this is detected by the antenna 154 provided in the light emitting unit 150. Then, the circuit section 160 makes the EL display similar to the first embodiment.
The element 152 is driven to emit light. Thus, according to the present embodiment, when there is an incoming call to the mobile phone 190, the mobile phone 1
The top and sides of 90 emit light.

<Embodiment 4> Next, Embodiment 4 of the present invention will be described. In this embodiment, an EL element is provided on a pouch (accessory), and a portion of the pouch emits light when radio waves are transmitted from a mobile phone.

FIG. 8 shows an external appearance, and FIG. 9 shows an exploded main part. In these figures, ring-shaped EL elements 206 and ring-shaped antennas 208 are provided inside the rims 202 and 204 of the pouch 200, respectively.
Is stored. Further, a circuit section 210 is provided at an appropriate position in the pouch 200. The circuit unit 210
A circuit board on which an EL drive circuit having the same configuration as that of FIG. 2 described above is formed is housed in an appropriate case.
Drive 6 light emission. The EL element 206 and the antenna 208 described above are connected to the circuit unit 210.

Next, the operation of the present embodiment will be described. The portable telephone 220 is housed in the porch 200 with the fastener 201 of the porch 200 opened. Mobile phone 2 in this state
When radio waves are output from the 20 antennas 222, the radio waves are detected by the antennas 208 provided on the porch rims 202 and 204. Then, the EL element 206 is driven in the same manner as in the first embodiment, and the porch 20 is driven.
The 0 borders 202 and 204 emit light.

As described above, according to this embodiment, the mobile phone 2
When there is an incoming call at 20, the rims 202, 2 of the pouch 200
04 emits light. Therefore, the user can know the incoming call without performing an incoming call operation such as ringing a tone on the mobile phone 220 side or driving a vibrator. Although the present embodiment is an example of a pouch, an EL element may be embedded in various kinds such as a case or a bag of a mobile phone.

The present invention has many embodiments, and various modifications can be made based on the above disclosure. For example, the following is also included. (1) Processing such as attaching a color or pattern to an exterior portion or treating a character or the like may be performed as necessary. E
The same applies to the color and shape of the L element. (2) As the EL element, there are various shapes such as a fiber shape and a panel shape, but an appropriate shape may be used as necessary. Also, different shapes may be combined. The site for attaching the EL element is also arbitrary.

(3) In the above embodiment, the radio wave transmitted from the mobile phone is detected by an antenna provided separately. However, various means for detecting the radio wave are known. May be used. Various circuits are also known for driving the EL elements, and any of them may be used.

FIG. 10 shows an example of a drive circuit using an EL IC (integrated circuit). In the figure, an antenna 30 is provided with a voltage doubler detection circuit 3 as in the embodiment of FIG.
00 is connected. Voltage doubler detection circuit 3 in this example
00 is a capacitor C10, diodes D10 and D12.
It is constituted by. This voltage doubler detection circuit 300
Are connected to the switching circuit 302 as in FIG. The switching circuit 302 in the present example is configured by R10 to R14 and a capacitor C12 around a transistor Q10. The oscillation circuit and the booster circuit shown in FIG. 1 are configured by a circuit centering on the IC 304 in this example. As the IC 304, Si
“SP4424” manufactured by Pex Corporation is used.

The emitter of the transistor Q10 of the switching circuit 302 is directly connected to the terminal 6 of the IC 304, and is also connected to the battery BT10. Further, the emitter of the transistor Q10 is further connected to the terminal 3 of the IC 304 via the coil L10. The coil L10 is for adjusting the resonance frequency. IC
Terminal 1 of 304 is connected to ground via a capacitor C14, and terminal 2 is connected to ground. The terminal 8 is connected to the ground via a capacitor C16. The terminal 7 is connected to the collector of the transistor Q10, and the terminals 4 and 5 are connected to the EL element 10.

When a radio wave is detected by the voltage doubler detection circuit 300, the output voltage of the battery BT 10 is applied to the IC 304 by the switching circuit 302. The IC 304 receives power supply from the battery BT10, performs oscillation and boosting,
A drive voltage is supplied to the EL element 10. Thereby, EL
The element 10 emits light. As described above, by using an integrated circuit for driving an EL element, the entire driving circuit can be reduced in size, which is convenient for a portable device.

(4) In the above embodiment, the present invention is mainly applied to a portable telephone. However, the present invention is applicable to various communication devices such as a PHS, a transceiver, a portable information terminal and the like which output radio waves. It is.

[0033]

As described above, according to the present invention,
The following effects are obtained. (1) Since an EL element is used, it is possible to obtain a light emitting device of various and novel designs. (2) Sufficient brightness can be obtained because of battery operation,
Confirmation of an incoming call or the like can be easily performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing an example of a configuration of a circuit section for driving an EL element according to the first embodiment.

FIG. 3 is a diagram showing a state when the first embodiment is used.

FIG. 4 is a diagram showing a second embodiment of the present invention.

FIG. 5 is a diagram showing a main part of the second embodiment.

FIG. 6 is a diagram showing a main part of a third embodiment of the present invention.

FIG. 7 is a diagram showing a state when the third embodiment is used.

FIG. 8 is a diagram showing a fourth embodiment of the present invention.

FIG. 9 is a diagram showing a main part of the fourth embodiment.

FIG. 10 is a circuit diagram showing another example of the EL element drive circuit.

[Explanation of symbols]

10, 152, 206 EL element 20, 102, 160, 210 Circuit part 21 Battery holder 22, 300 Voltage doubler detection circuit 24, 302 Switching circuit 26 Oscillator circuit 28 Boost circuit 30 ... Thin string 40 ... Exterior 50, 110, 190, 220 ... Mobile phone 52 ... Mounting holes 54, 105, 112, 154, 192, 208, 22
2 Antenna 100 Protector 104 Upper frame 106 Lower frame 150 Light emitting unit 156, 162 Double-sided adhesive tape 200 Pouch 201 Fastener 202 Pouch border 202 202 Border 304 IC BT, BT10 Battery C Capacitor D: Diode Q: Transistor T: Transformer

Claims (6)

[Claims] A radio wave detecting means for detecting a radio wave transmitted from an antenna of a communication device; an EL element which emits light when a driving voltage is applied; a driving voltage is applied to the EL element when a radio wave is detected by the radio wave detecting means. A light emitting device for a communication device, comprising: 2. The light emitting device for communication equipment according to claim 1, comprising a plurality of said EL elements. 3. The light emitting device for a communication device according to claim 1, wherein the EL element doubles as a strap or a protector of the communication device. 4. The driving means comprises: a detecting means for detecting an output of the radio wave detecting means; a switching means for switching DC power supply based on a detection signal from the detecting means; a DC power supplied by the switching means. 4. A light emitting device for a communication device according to claim 1, further comprising inverter means for converting the light into an alternating current. 5. The light emitting device for a communication device according to claim 1, wherein said radio wave detecting means, the EL element, and said driving means are provided near a main body of said communication device. 6. The light emitting device for a communication device according to claim 1, wherein the radio wave detection means, the EL element, and the driving means are provided in a housing of the communication device.