Gas discharge lamp trigger control circuit

Abstract

The invention relates to a gas discharge lamp trigger control circuit. The gas discharge lamp trigger control circuit includes a trigger circuit used for performing trigger actuation on a gas discharge lamp, a sampling circuit used for sampling the voltage of the input end of the trigger circuit and outputting a sampling value, and a timing control circuit used for judging whether the gas discharge lamp is turned on according to the sampling value; if the gas discharge lamp is turned on, the timing control circuit outputs turn-off signals to the trigger circuit, so that the trigger circuit terminates the trigger actuation; if the gas discharge lamp is not turned on, the timing control circuit continuously outputs turn-on signals to the trigger circuit in a first period immediately, so that the trigger circuit keeps the trigger actuation; when the time comes to the first period, and the gas discharge lamp is not turned on, the timing control circuit enters a timing mode and outputs turn-off signals to the trigger circuit; and when the time comes to a period set by the timing mode, the timing control circuit outputs turn-on signals to the trigger circuit, so that a new round of trigger operation can be performed on the gas discharge lamp. The gas discharge lamp trigger control circuit is advantageous in low damage rate.

Description

technical field [0001] The invention relates to the technical field of trigger control, in particular to a trigger control circuit for a gas discharge lamp. Background technique [0002] A gas discharge lamp (High Intensity Discharge, HID) is a lamp that emits light by discharging gas, metal vapor, or a mixture of several gases and metal vapor. Gas discharge lamps have the advantages of selective radiation spectrum, high efficiency, long life and good light output maintenance characteristics. Gas discharge lamps are widely used in industry, agriculture, health care and scientific research. [0003] In some areas with large voltage fluctuations such as rural gas stations, the gas discharge lamp will automatically go out due to voltage fluctuations. After the gas discharge lamp is automatically extinguished, its trigger control circuit will continue to trigger, and the gas discharge lamp in a hot state cannot be hot-started. Therefore, if the trigger control circuit generat...

AI Technical Summary

Problems solved by technology

Therefore, if the trigger control circuit generates high-voltage pulses for a long time, it is easy to damage the bulb electrodes, resulting in shortened or even damaged bulb life, and at the same time, it will shorten the life of the trigger control circuit and cause a high damage rate.

Moreover, in unattended industrial sites and lamps installed at high altitudes, when the bulb has not been replaced for a long time due to expiration or damage, the continuous triggering action of the trigger control circuit will lead to a reduction in the life of the trigger or even damage. higher rate

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