KR100653755B1 - El-sheet drive circuit having function of transmitting and receiving wireless signal for a streetlight switch - Google Patents

Abstract

An EL-sheet inverter drive circuit having a function of transmitting and receiving a wireless signal for a streetlight switch is provided to conveniently manage and repair by detecting an error of each circuit and informing the error to a remote control room wirelessly. In an EL-sheet inverter drive circuit(202) having a function of transmitting and receiving a wireless signal for a streetlight switch, an operation power supplying unit(204) supplies a frequency and an AC voltage to drive the EL sheet by receiving external AC power. A transmitting and receiving unit(212) transmits error information of each component of the inverter drive circuit to a remote control room wirelessly and receives a wireless control signal transmitted from the control room. A control circuit unit(214) controls the operation of each component unit, and receives the wireless signal through the transmitting and receiving unit(212) and changes and controls the operation pattern of the EL-sheet.

Description

EL-SHEET DRIVE CIRCUIT HAVING FUNCTION OF TRANSMITTING AND RECEIVING WIRELESS SIGNAL FOR A STREETLIGHT SWITCH}

1 is a schematic configuration diagram of an inverter circuit for a conventional EL display device;

2 is a block diagram of an EL-sheet inverter driving circuit capable of transmitting / receiving a radio signal according to an exemplary embodiment of the present invention.

3 is a detailed block diagram of a control circuit part in the EL-sheet inverter driving circuit shown in FIG. 2;

<Brief description of the major symbols in the drawings>

200: AC power source 202: EL-sheet inverter drive circuit

206: converter section 208: smoothing circuit section

210: inverter unit 212: transmitter / receiver

214: control circuit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EL (Electro-Luminescene) display element, which is a self-luminous display element, and more particularly to an EL-sheet inverter drive circuit for a display capable of transmitting / receiving a wireless signal.

In general, an EL display device is an active display device that emits light when an electric field is applied to a semiconducting phosphor material. When an AC voltage is applied to a transparent organic film or a linear structure coated with a light emitting phosphor, Due to the rapid charging and discharging of the phosphor, the movement of electrons in the charge / discharge cycle is seen as light.

 As the light emitting device using the EL phenomenon, EL-Sheet, EL-Wire, EL-Strip, etc. have been developed, and are not only thin and light, but also emit light of short wavelength and emit various colors. Since it can be easily expressed, it is used for decorative purposes in small items such as portable terminals, picture frames, interiors, etc., and has been variously applied to advertisement signs and vehicle decorations.

These EL display elements are usually operated with a voltage of AC 100V to 240V and a frequency of 400Hz to 4kHz. An EL inverter, which is a power supply, controls the brightness and the flashing speed of light by varying the input voltage and frequency. And produce a variety of colors.

1 shows a schematic block configuration of an inverter for a conventional EL light emitting device. Referring to FIG. 1, the inverter driving circuit 102 for a conventional EL light emitting device includes a smoothing circuit 104, an inverter 106, and a control. Circuit 108.

The smoothing circuit 104 is composed of a diode and a condenser to convert an AC voltage applied from an external AC power source 100 to convert a DC voltage, and the inverter 106 from the smoothing circuit 104. While controlling the switching width of the converted DC voltage, it is converted into an AC voltage and a frequency for driving the EL sheet, and applied to the EL sheet. The control circuit 108 controls the operation of the smoothing circuit 104 and the inverter 106 to control the operation of the EL sheet by applying an external AC power supply 100 to the EL sheet.

However, the above-described conventional EL light emitting device inverter 106 only serves to supply operating power to the EL sheet connected to the inverter 106 according to a control signal from the control circuit 108. In addition, it was not possible to control the brightness and the flashing speed of the light by software and to produce various colors. Also, it is not equipped with the means to communicate wirelessly with the remote control station. In order to manage the operation of the remote control station, such as having to go and inspect it by hand.

Accordingly, an object of the present invention is to transmit and receive a wireless signal, and to control the brightness and the flashing speed of light by software and to transmit and receive a wireless signal for a street lamp flasher that can produce various colors. An EL-sheet inverter driving circuit is provided.

The present invention for achieving the above object is an EL sheet inverter driving circuit capable of wireless transmission / reception for a street lamp blinker, the operation power supply for supplying a frequency and AC voltage for driving the EL sheet by receiving an external AC power; A wireless transmission of an abnormality and other matters of each component of the inverter driving circuit to the winchage control room, a transmission / receiving unit receiving a wireless control signal transmitted from the control room, and controlling the operation of each component of the inverter driving circuit, It is characterized in that it comprises a control circuit unit for controlling the operation pattern of the EL-sheet by changing the program of the one-chip microcomputer without changing the circuit of the EL-sheet and the inverter using the one-chip microcomputer by receiving the radio signal through the transmitting / receiving unit.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the preferred embodiment according to the present invention.

2 illustrates a detailed block configuration of an EL-sheet inverter capable of transmitting / receiving a radio signal according to an embodiment of the present invention. The EL-sheet inverter driving circuit 202 of the present invention is attached to a street lamp blinker or the like, and is used to display various tourist attractions promotion information of a corresponding city / state or display an advertisement.

Referring to FIG. 2, the EL-sheet inverter driving circuit 202 of the present invention includes an operating power supply unit 204 for supplying a frequency and an AC voltage for driving an EL sheet by receiving an external AC power source 200; The transmission / reception unit 212 wirelessly transmits the abnormality of the components of the inverter driving circuits and other matters to the winchastic control room, and receives the wireless control signal transmitted from the control room, and controls the operation of the components of the inverter driving circuit. And, by receiving the radio signal through the transmission / reception unit 212, using a one chip micom (one chip micom) to change the control pattern of the EL-sheet by changing the program of the one-chip micom without changing the circuit of the EL-sheet and inverter The control circuit unit 214 is included.

Hereinafter, an operation of the EL-sheet inverter driving circuit 202 capable of transmitting / receiving a radio signal according to the present invention will be described in detail with reference to FIG. 2.

First, the converter 206 in the operation power supply unit 204 converts an AC voltage applied from the external AC power supply unit 200 into a DC voltage and applies it to the smoothing circuit unit 208. The smoothing circuit unit 208 removes the pulsation and ripple voltage of the power supply voltage converted into the DC voltage through the converter unit 206 and converts it into a stable DC voltage. That is, after the AC voltage applied from the external AC power supply unit 200 is rectified by the diode of the converter 206, the pulsed current and the ripple voltage are removed through the low pass filter (LPF) of the smoothing circuit unit 208. Stable DC voltage is converted.

Inverter 210 is applied to drive the EL-sheet while controlling the switching width of the rectified DC voltage by applying a stable DC voltage rectified and pulsated from the converter unit 206 and the smoothing circuit unit 208 Convert to AC voltage and frequency and apply to EL sheet.

The transmitter / receiver 212 wirelessly transmits an abnormality of each component of the inverter driving circuit and other matters to the remote control room, receives the wireless control signal transmitted from the remote control room, and applies it to the control circuit unit 214.

As shown in FIG. 3, the control circuit unit 214 includes a driving circuit 300, a protection circuit 302, a one chip micom 304, and an input / output transformer 306. The driving circuit controls the operation of each component. The driving circuit 300 is used as a comparison signal of the one-chip microcomputer by generating a pulse wave of a certain period, the protection circuit 302 is a fire protection and circuit protection unit due to lightning or overvoltage and overheating, input / output transformer ( 306 is a resonant circuit portion for amplifying a small signal of a square wave coming from a microcomputer and converting it into an alternating sine wave.

In addition, when the control circuit unit 214 receives the radio signal through the transmitter / receiver 212 according to an exemplary embodiment of the present invention, the control circuit unit 214 removes an unnecessary signal through a process of modulation / demodulation to provide a protocol of the received signal. One-chip microcomputer is handed over to the one-chip microcomputer. Then, one-chip microcomputer can decode the signal protocol and store it in memory to control the brightness and flashing speed of software and to produce various colors without changing the circuit of EL-sheet and inverter. It is possible to easily change the operation pattern of the EL-sheet simply by changing the program of the one-chip microcomputer by the transmission signal.

In addition, the control circuit unit 214 can be multi-channel according to the present invention, the EL-sheet brightness can be adjusted by software, and the EL-sheet inverter driving circuit by supplying a stable current by detecting the supply current of the EL-sheet. Long life is guaranteed. In addition, it provides the convenience of maintenance by detecting the abnormality of each circuit and notifying the remote control station of the failure. In this case, the multi-channel means that a plurality of EL sheets can be controlled by using one inverter, and the control circuit unit 214 expresses various colors by overlapping a plurality of EL sheets with one inverter through a multi-channel function. This makes it possible to achieve brightness and vibrant color expression.

On the other hand, the remote control station can change the color and pattern of the backlight plate provided in the control circuit unit 214 through the transmission / reception unit 212 provided in the EL-sheet inverter driving circuit using only a radio signal. The abnormality of the control circuit unit 214 is inspected and transmitted to the control station through the transmission / reception unit 212, so that the remote monitoring of the control circuit unit 214 is possible even if the administrator does not go directly to the control circuit unit 214 to check the state. do.

As described above, in the present invention, in the EL-sheet inverter driving circuit, the transmitting / receiving unit capable of transmitting / receiving a wireless signal with the remote control room is implemented in the driving circuit, thereby using the one-chip microcomputer of the control circuit unit via the wireless signal. It is possible to easily change the operating pattern of EL-sheet by changing the program of one-chip microcomputer without changing the circuit of seat and inverter, multi-channel is possible, and the brightness of EL-sheet can be adjusted by software. In addition, the long-life is guaranteed by detecting the supply current of the EL-sheet and supplying a stable current, and it is convenient to maintain and maintain it by detecting the abnormality of each circuit and wirelessly notifying the remote control station.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the invention should be determined by the claims rather than by the described embodiments.

As described above, in the present invention, in the EL-sheet inverter driving circuit, by implementing a transmitting / receiving unit capable of transmitting / receiving a radio signal with a remote control room in a driving circuit, the one-chip of the control circuit unit via a radio signal Using microcomputer, you can easily change the operating pattern of EL-sheet by changing the program of one-chip microcomputer without changing the circuit of EL-sheet and inverter, multi-channel is possible, and the brightness of EL-sheet can be adjusted by software. There is this. In addition, the long-life is guaranteed by detecting a supply current of the EL-sheet and supplying a stable current, and there is an advantage that maintenance is also convenient by detecting an abnormality of each circuit and informing the remote control station wirelessly.

Claims (4)

EL sheet inverter driving circuit capable of wireless transmission / reception for street light flasher, An operating power supply for supplying a frequency and an AC voltage for driving the EL sheet by receiving an external AC power; A transmission / reception unit wirelessly transmitting abnormality information of each component of the inverter driving circuit to a win remote control room, and receiving a wireless control signal transmitted from the control room; The control circuit unit controls the operation of each component of the inverter driving circuit, and controls the operation pattern of the EL-sheet by changing the program of the one-chip microcomputer without changing the circuit of the EL-sheet and the inverter by receiving a radio signal through the transmitter / receiver. EL-sheet inverter drive circuit capable of wireless transmission and reception including a. The method of claim 1, The operation power supply unit, A converter unit for converting an AC voltage applied from an external AC power supply unit into a DC voltage; A smoothing circuit unit for removing the ripple and ripple voltage of the power voltage converted into the DC voltage through the converter unit and converting it into a stable DC voltage; Inverter unit for converting into a DC voltage and frequency for driving the EL-sheet while controlling the switching width of the rectified DC voltage by receiving a stable DC voltage rectified and removed from the converter and smoothing EL-sheet inverter drive circuit capable of wireless transmission and reception comprising a. The method of claim 1, The control circuit unit, Multi-channel is possible by using one-chip microcomputer, EL-sheet brightness can be adjusted by software, and wireless transmitting / receiving EL-sheet is characterized by supplying stable current by detecting supply current of EL-sheet. Inverter driving circuit. The method of claim 1, The control circuit unit, The EL-sheet inverter driving circuit capable of detecting the abnormality of the EL-sheet inverter driving circuit and wirelessly notifying the control station located at a remote location.

Images