KR920015671A - Discharge light circuit fault detection display device and automatic power off device - Google Patents

Abstract

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Description

Discharge light circuit fault detection display device and automatic power off device

Since this is an open matter, no full text was included.

1 is a block diagram of a discharge lamp circuit failure detection and display device of the present invention, and FIG. 2 is a detailed circuit diagram of a discharge lamp circuit failure detection and display device of the present invention.

Claims (7)

1. A discharge lamp circuit failure detection and display device which detects and displays a fault portion in combination with a discharge lamp circuit comprising a choke coil, a high voltage pulse generator circuit, and a discharge lamp, comprising: a first power supply terminal (A) connected to one lead of the choke coil; A second power supply terminal (B) connected to one lead of the lamp connected in series with the choke coil; A voltage abnormality display unit 64 comprising a resistor R10 and a first light emitting element LD2 connected in series and connected between the first power supply terminal and the second power supply terminal; two or more resistors and a diode connected in series A voltage divider circuit 62 connected between the choke coil and the lamp connection point and the second power supply terminal; A zener diode, a second light emitting element LD1 and a resistor R7 which are sequentially connected in series are connected between the second power supply terminal and the resistor and the resistance connection point D of the voltage divider circuit, and the zener diode and the second light emitting element A pulse abnormality display section 63 formed by connecting a capacitor C3 between a connection point of the circuit and the second power supply terminal; A current transformer, a resistor, and a third light emitting element LD3, which are magnetically coupled to a power lead between the choke coil terminal opposite to the first power terminal and the second power terminal, are connected in series. Discharge lamp circuit failure detection display device comprising a lamp abnormality display unit 65 of which is gradually connected to the power lead. The method of claim 1, wherein the first resistor R8 for the digital signal is added between the first light emitting device and the first or second power supply terminal, and between the third light emitting device and the current transformer or the resistor of the lamp fault display unit. Discharge lamp circuit failure detection and display device, characterized in that a digital signal second resistor (R9) is added, and a terminal opposite to the light emitting element of the second resistor is connected to a power lead. The discharge lamp circuit failure detection and display device according to claim 1, further comprising a diode and a resistor for protecting said third light emitting element. 4. The discharge lamp circuit failure detection and display device according to claim 1, 2 or 3, wherein the cathode electrode of the zener diode ZD is connected to the SCR trigger electrode connection point of the high voltage pulse generator circuit and the voltage divider circuit is removed. A discharge lamp circuit automatic power cut-off device coupled with a discharge lamp lighting circuit composed of a choke coil, a high voltage pulse generator circuit, and a discharge lamp to detect a fault condition and cut off power, wherein the power control switch turns on or off the power supply to the discharge lamp circuit. (1) and; A control signal generation circuit (5) for turning on the power control switch (1) for a boiling point time after the power is turned on to the power control switch and then applying a control signal to turn off the switch when a failure occurs; A timer (4) for supplying a timing signal to the control signal generation circuit; A discharge lamp circuit automatic power cutoff including a fault detection display device 6 for detecting a power supply fault, a pulse fault and a lamp fault condition of the discharge lamp circuit and supplying a fault signal to the control signal generating circuit 5 in case of a fault. Device. 6. The apparatus of claim 5, wherein the power control switch is a solid state relay (SSR). 7. The control signal generating circuit (5) according to claim 5 or 6, comprising one OR gate with three inputs, one AND gate with two inputs, and one inverter, the output of the OR gate. Is connected to a control input terminal of an electronic control switch, one of two inputs of an OR gate is connected to the output of the timer, and the other is connected to an output of the AND gate, and one of three inputs of the AND gate. Is connected to one electrode of the pulse abnormality display device (light emitting device) of the fault detection display device via the inverter, and the other two inputs are respectively connected to one of the power failure and lamp failure display device of the fault detection display device. Discharge lamp circuit automatic power cut-off device characterized in that. ※ Note: The disclosure is based on the initial application.