The LED is turned off the light bulb is still dim how to solve
as we all know, light access when a fire YiLingLiangTiao wire at both ends and normal bright light. When light two access wire at the same time, the light will surely not bright, also won't dim or shine. If two head lamp at the same time access after the zero line will present the following conditions, good quality, light not on the poor quality of lamp and some of the so-called super bright light appears dim or shine.
why will appear this kind of situation? This from LED work principle, the LED is work in the pure state of dc or pulse dc, circuit board of the rectifier circuit first 220 to 220 v ac? 吗? 2 = 310 v dc pulse, and then a direct current pulse pump power components will drop to suitable for LED dozens of volts. In order to avoid electronic components on the circuit board is not it? The peak voltage breakdown of 2, usually in the input series ac circuits of a high value of resistance to pressure limiting, with the volume of resistance to current limit. Hours when the resistance tolerance, through double switch closed the induction voltage on the zero line, will trigger conduction pump power LED, homework, because of the zero line induced current is not strong, so the LED in the dim state, this situation is the same as the digital sensor test pencil.
in domestic outfit embedded lines, total brake, if be to adopt a single p open a lamp control set of combination, induced current on the zero line will make LED dim light in the environment. If there is only one open, because don't have much zero, so the LED will shine like cars turn lights.
understand the reason of improvement measures, find vendors swaps LED lights. If the lamp is shopping, transfer is not practical, only add the largest resistance tolerance on printed circuit boards, using three tables to measure the resistance of the gear, the added value of the resistance is f test 1. 1 to 1. Three times, constant or variable resistor original volume, increase the resistance of LED lamp brightness will drop slightly, the human eye feel not to come out and just yourself.
another kind of improvement method is to use a non-polar capacitors in parallel on the LED, capacitance pressure must be above 660 v, otherwise it will due to the thunderstorm weather outdoor electrical wiring in the lightning, breakdown lead to open the capacitor tripping