Folding LED touch lamp generally will be problematic
This question is very open Should be easy problems is that the light bead life and heat dissipation The second is the touch failure problem
Is the most prone to problem of LED lights, light failure after the time far short of the publicity of use fixed number of year. Followed by touch components, due to the aging over time, after a certain period of time, the original set of voltage and current value has been far away from the original design value, prone to touch difficult, the problem of interval are not allowed to touch.
This topic is not answer, because the LED control method are many, and the way of touch also many, control way is very much also, only from the basic principles. Caused by electric current is the main reason for the failure of light, at the same time, the LED lamps and lanterns has typical characteristics of diode (very small voltage variation, huge current change) so, LED lights control method based on current control is the best, since it is control cannot use constant current source, but to use can control constant current source. In controllable constant current source, a switch type and linear type, because the switch type is inductance as the main device, and a sharp tuning switch frequency will cause many problems, it is easy to damage the leds, controllable linear constant current source is low efficiency, but the problem is less easy to implement.
That should see is a circuit board, or no circuit board, if there is a circuit board, circuit board regulated part of the easy problems, no circuit board switch are problematic
