Plasma body display screen over current detection device
A plasma and detection device technology, applied in the field of plasma display screen overcurrent detection devices, can solve the problems of long transmission delay time, complex circuit structure of detection device, unsuitable for plasma display screen and the like, and achieves short transmission delay time, The effect of preventing misoperation and simple structure
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[0018] see figure 2 . The overcurrent detecting device of the present invention is for detecting that the first, second and third output voltages of the plasma display driver (not shown) gradually drop below the corresponding normal voltage due to the overcurrent of the plasma display situation and generate an output control signal to the driver. This overcurrent detecting means includes a switching transistor TRs, a voltage signal generating section 21 and switching supporting sections ZR21, ZR22, R21 and R22. Here, the switching transistor TRs is an NPN bipolar transistor.
[0019] The +18 volt bias voltage Vcc applied to the bias power port 22 drops at a specific rate through the resistor R23 and VR, and the dropped bias voltage is applied to the collector C of the switching transistor TRs. The emitter E of the switching transistor TRs is connected to the ground through the ground terminal G. The switching transistor TRs operates according to the level of the voltage ap...
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