Cold cathode florescent lamp converter, control method thereof and control module thereof
A technology of a control module and a control method, which is applied to instruments, static indicators, lighting devices, etc., can solve the problems of cost, time-consuming, and the inability to adjust the duty cycle of the control signal, and achieve the effect of reducing labor and time costs.
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[0043] The present invention will be described in detail below with reference to the drawings and embodiments.
[0044] Refer to image 3 and Figure 4 , Is the first preferred embodiment of the cold cathode lamp commutation device (hereinafter referred to as the commutation device) of the present invention. The commutation device 1 is applied to a cold cathode lamp (Cold Cathod Fluorescent Lamp, CCFL) 2 as As a backlight liquid crystal display, the inverter device 1 includes an inverter 3 and a control module 4. Such as Figure 4 As shown, the inverter 3 includes a controller 31 and a driving circuit 32. The drive circuit 32 includes a push-pull parallel resonant circuit for lighting cold cathode lamps, and has a DC power supply 30. The drive circuit 32 mainly uses two power transistors 33 and 34 that are controlled by the controller 31 as switches. An input DC voltage is converted into an AC voltage through a transformer 35, and then a resonant circuit 36 composed of an indu...
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