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The LCD screen electric measuring machine is introduced as follows:
There are two groups of signals sent by the LCD screen electric measuring machine, one group is the common electrode COM signal, one group is the segment electrode SEG signal. COM signal is mainly input to the back electrode through the silver point of the liquid crystal display, while SEG signal is directly input to the surface electrode. In this way, if an AC voltage is added to the intersection area of the back electrode and the surface electrode, when such a driving voltage (COM-SEG) When the effective value of is greater than the threshold voltage of the liquid crystal display, it will be displayed, showing the corresponding strokes or graphics. The electric measuring machine can test the display quality of various LCD display screens, and can judge the excessive current caused by short circuit and pollution of LCD devices and sound and light alarm.
1. Performance index of LCD electric measuring machine
2. Operating voltage range continuously adjustable: 0-5 V, the display value is SEG- COM synthesis waveform Uop 1/2
3, working frequency: 100HZ
4, working voltage range adjustable 0-1uA; 0-5uA; 0-10uA; 0- 50uA
5. The upper limit alarm point can be set arbitrarily.
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