Light-emitting diode (LED) lamp box provided with constant-current power supply devices
A technology of LED light box and constant current power supply, which is applied to the components of lighting devices, lighting devices, circuit layout, etc. It can solve the problems of inconsistency in series connection of current limiting resistors, decrease in cost and efficiency, and many constant current units. Complicated wiring, improved efficiency, and reduced quantity
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[0013] The present invention will be further described below in conjunction with the accompanying drawings.
[0014] Such as Figure 1 to Figure 3 As shown, the present invention includes a light box 3 and a light bar 1 arranged in the light box 3 . Each wick 2 on the light bar 1 is connected in series, and each light bar 1 is connected in parallel; the light bar 1 is also provided with a constant current power supply device 4 which is respectively connected in series with the wicks 2 on the light bar 1 .
[0015] Such as Figure 4 As shown, the power supply voltage of the constant current power supply device 4 in the present invention passes through the power supply anti-reverse connection device successively through a filter, a transformer, a frequency converter, a rectifier, a voltage detector, and the amplifier is then connected back to the transformer through the controller. The signal after the current detection is sent to the controller, and the voltage output by the ...
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