JP2001292201A - Light emitting device for portable telephone set and method for making emitted light into compound color - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting device for portable telephone set, which can improve both visibility and fashionability and can be driven with a small power. SOLUTION: This device is provided with a tuner circuit A to tune to the transmitting/receiving carrier wave of a portable telephone set 8 and an LED 4, which is made into one chip, equipped with three colors of red LED 41, green LED 42 and blue LED 43 to be emitted by the output of this tuner circuit A, two of these colors alternately flicker in a desired cycle by a C-MOS 6 and at the same time, the other color flicker and is added in a desired cycle by the C-MOS 6. Thus, the desired light emitting color is created by combining the light in three colors of the red LED 41, green LED 42 and blue LED 43. Namely, multicolor can be easily created.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-emitting device for a portable telephone, which informs that the portable telephone is in a transmitting / receiving state by lighting a light-emitting body.

[0002]

2. Description of the Related Art In recent years, mounting of a light-emitting device has become popular in which a portable telephone is notified of an incoming call state by turning on an LED (light-emitting diode). The configuration of the light emitting device is such that an LED serving as a light emitting body is attached to an LC resonance circuit that tunes to a transmission / reception carrier (high frequency) of a mobile phone. This is the lighting power.

This light-emitting device is mounted on the tip of an antenna rod of a mobile phone, and a light-emitting body provided in the light-emitting device includes one LED of a color excellent in visibility at the time of lighting.
They are individually selected and provided. Further, recently, in order to further improve visibility and fashionability, a device having a plurality of LEDs has appeared, and the visibility has been improved at least as compared with a conventional device having one LED.

[0004] However, since a plurality of LEDs emit light at the same time, the light emission color appears to be a single mixed color when viewed from a distance. And this color was not a pretty luminescent color, it was more conspicuous than visibility, and it was not acceptable to young people who value fashion.

[0005]

An object of the present invention is to provide a light emitting device for a mobile phone which can improve both visibility and fashionability and can be driven with weak power. It is intended for.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention is a light emitting device including a tuning circuit for tuning to a transmission / reception carrier of a mobile phone, and a plurality of light emitters for emitting light at the output of the tuning circuit. The illuminators of the mobile phone, wherein each of the illuminants is of a different color, two of the illuminants alternately flash at a desired cycle, and the other illuminants also light or flash at a desired cycle. Device.

[0007] A portable telephone to which the present invention is applied is a device for communicating wirelessly, and includes all wireless devices that communicate using high-frequency transmission / reception carrier waves. The antenna rod for transmitting and receiving carrier waves is an antenna means for transmitting and receiving the radio wave, and the total length of the transmitting and receiving antennas is fixed or variable, and usually the length can be adjusted to enhance the tuning effect. There are many things.

The tuning circuit which tunes to the transmission / reception carrier of the portable telephone comprises an LC resonance circuit or the like. Specifically, a coil serving as a tuning antenna electromagnetically coupled to the transmission / reception carrier of the portable telephone is provided on a printed circuit board. And a diode, and connected to a capacitor or a virtual capacitor means having a capacitor function. DC voltage generated by this tuning circuit is LED
Drive power.

The LED blinks at a desired cycle. The method of blinking is not particularly limited, and a blinking circuit may be constituted by suitable components. It is sufficient to use a certain C-MOS, set a time constant with an appropriate resistor (R) and capacitor (C), and set a blinking (lighting / off) time. The printed circuit board on which the tuning circuit is provided is electrically insulated from the antenna rod and coupled only electromagnetically to be provided at the tip of the antenna rod of the mobile phone.

The C-MOS is for turning on / off an input DC voltage at an appropriate cycle and outputting the DC voltage. That is, a voltage of a certain level is switched between a high level and a zero level and output. The switching cycle is generally performed by setting a time constant using a resistor and a capacitor, but may be performed by switching of the IC itself. C-
A suitable MOS may be selected and used.

It is preferable to use an LED as the luminous body, and it is preferable to provide three luminous bodies which emit red, green and blue light adjacent to each other. Further, a one-chip LED having three colors of red, green and blue may be used. Then, the colors to be blinked alternately are two desired colors among the three colors, the two colors are blinked alternately at an appropriate cycle, and one color blinked at an appropriate cycle is added thereto. For example, red and green may be alternately blinked at an appropriate cycle, and blue blinked at an appropriate cycle may be added thereto.

There are no particular restrictions on the colors that blink alternately or the colors that blink independently, and any desired color may be combined. Also, the blinking period is not particularly limited,
A desired period may be set according to the time constant of the resistor and the capacitor. For example, by making the blinking cycle of a color that blinks alone 1.5 times the blinking cycle of one color that blinks alternately, the emission colors become four.

[0013]

Since the light emitting device of the present invention is constructed as described above, if the portable telephone is in the transmitting / receiving state, a voltage is generated on the antenna rod, and the tuned antenna or coil which is electromagnetically coupled to the antenna rod is excited. , The voltage of which is rectified to a DC voltage by a diode, and the DC voltage alternately flashes two colors, and a C-MOS that flashes independently.
S is applied to each of them.

Each of the C-MOSs switches a DC voltage between a high level and a zero level at a cycle of a time constant set by a resistor and a capacitor, and supplies the DC voltage to each LED connected to an output terminal. As a result, the two LEDs alternately flash, and the one LED flashes independently at the cycle of the time constant set respectively.

The two colors that alternately flash are red and green,
If one color that blinks alone is blue, the emission color is red / green, and the mixture of red and blue is purple, and the mixture of green and blue is sky blue. Can be made into four colors.

[0016]

FIG. 1 is a circuit diagram of a light emitting device according to the present invention. FIG. 1 is a circuit diagram of a light emitting device according to the present invention. The rectifier diode 3 is a capacitor effect obtained by making the printed circuit board 7 or a conductor (not shown) in the circuit and the antenna rod 9 insulated with a virtual capacitor, and does not actually exist in the circuit. Reference numeral 41 denotes a red LED, reference numeral 42 denotes a green LED, reference numeral 43 denotes a blue LED, and reference numeral 5 denotes a resistor for adjusting a voltage.

6 is a C-MOS which is a low power IC
The DC voltage is switched between a high level and a zero level at the cycle of the time constant set by the resistor 61 and the capacitor 62, and the red LED 41, the green LED 42, and the blue L
The LEDs of the ED 43 blink. 8 is a mobile phone, 9
Is a light emitting device provided at the tip of the antenna rod 9 of the mobile phone 8.

FIG. 2 is a perspective view showing a light emitting device provided at the tip of the antenna rod, where 1 is a coil, 2 is a diode, and 4 is an LED.
This is a one-chip device having a blue LED 43. Reference numeral 6 denotes a C-MOS, which is provided on the printed circuit board 7.

FIG. 3 is a waveform diagram showing a pulse waveform of the C-MOS, wherein red and green have a relationship of being inverted. That is, they flash alternately. The pulse width of blue is 1.5 times that of red / green. In addition, the circuit is configured so that the light is turned on at the time of zero.

FIG. 4 is a diagram showing an example of colors of emitted light, and it is possible to generate at least four colors. Further, by changing the setting of the pulse width or changing the combination of the two colors, it is possible to obtain a more variety of emission colors.

[0021]

As described above, the light-emitting device of the present invention comprises a light-emitting portion composed of LEDs of red, green, and blue light-emitting colors, so that a desired light-emitting color can be easily obtained by combining the three colors of light. Can be produced. That is, multicolor can be easily created. This allows
Since light can be emitted in a color with excellent visibility and the emission color can be changed periodically, both visibility and fashion can be improved to a high level. In addition, since the C-MOS, which is a low power IC, is used for the blinking circuit for combining the three colors, the operation can be performed without any problem even with weak power, and the blinking cycle can be easily set.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a light emitting device according to the present invention.

FIG. 2 is a perspective view showing a light emitting device provided at the tip of an antenna rod.

FIG. 3 is a waveform diagram showing a pulse waveform by a C-MOS.

FIG. 4 is a diagram illustrating an example of a color that emits light.

[Explanation of symbols]

1-coil, 2-diode, 3-virtual capacitor, 4
-LED, 41-red LED, 42-green LED, 43
-Blue LED, 5-resistor, 6-C-MOS, 61-resistor, 62-capacitor, 7-printed circuit board, 8-cell phone, 9-antenna rod, 10-light emitting device, 11-top fitting, 12-cover , A-tuned circuit

Claims (5)

[Claims] 1. A light-emitting device comprising a tuning circuit for tuning to a transmission / reception carrier of a mobile phone, and a plurality of light-emitting members which emit light at the output of the tuning circuit, wherein each of the light-emitting members has a different color. A light emitting device for a mobile phone, wherein two of the light emitting elements alternately flash at a desired cycle, and the other light emitters also light or flash at a desired cycle. 2. The light-emitting device of a mobile phone according to claim 1, wherein said light-emitting body is a one-chip LED and has three colors of red, green and blue. 3. A light emitting device for a portable telephone according to claim 1, wherein said light emitting body is turned on and off by a C-MOS. 4. A light emitting device for a mobile phone according to claim 1, wherein said tuning circuit is provided on a printed circuit board, and said printed circuit board is electromagnetically coupled to an antenna rod only. 5. A one-chip LED having three colors of red, green, and blue alternately blinks two desired colors at a desired cycle, and blinks another color at a desired cycle. Method of complex coloring characterized by adding