Driving device for LED and the driving method thereof

A driving device for an LED, wherein, said driving device for an LED includes:

• a bridge rectifier, at least one LED-lamp bunch, at least one LED-lamp group, at least one P-type switching module, at least one N-type driving module, and a logic controller;
• said bridge rectifier, applied to rectify input signals;
• said P-type switching module, applied to drive said LED-lamp bunch;
• said N-type driving module, applied to drive said LED-lamp group;
• said logic controller, applied to control said P-type switching module and N-type driving module;
• wherein, the number of said LED-lamp bunch is the same as that of said P-type LED-lamp switching module;
• while the number of said LED-lamp groups is the same as that of said N-type driving module;
• said LED-lamp bunch connects to said LED-lamp group in serial;
• an anode of said LED-lamp bunch connects to a positive output end of said bridge rectifier, while a negative output end of said bridge rectifier gets grounded;
• a cathode of said LED-lamp bunch connects to the anode of said LED-lamp group;
• said logic controller connects to the anode and cathode of said LED-lamp bunch, respectively, through said P-type switching module;
• and said logic controller connects to the cathode of the LED-lamp group, through said N-type driving module;
• while said logic controller also connects to a negative input end of said bridge rectifier;
• 2 LED-lamp bunches, that is, a first LED-lamp bunch and a second LED-lamp bunch, respectively;
• 2 P-type switching modules, that is, a first P-type switching module and a second P-type switching module, respectively;
• 4 LED-lamp groups, that is, a first LED-lamp group, a second LED-lamp group, a third LED-lamp group and a fourth LED-lamp group, respectively;
• 4 N-type driving modules, that is, a first N-type driving module, a second N-type driving module, a third N-type driving module and a fourth N-type driving module, respectively;
• wherein said first LED-lamp bunch, second LED-lamp bunch, first LED-lamp group, second LED-lamp group, third LED-lamp group and fourth LED-lamp group are connecting one by one in the sequence;
• the anode of said first LED-lamp bunch connects to the positive output end of said bridge rectifier, while the negative output end of said bridge rectifier gets grounded;
• said logic controller connects to the anode and cathode of said first LED-lamp bunch, through said first P-type switching module, respectively;
• the cathode of said first LED-lamp bunch connects to the anode of said second LED-lamp bunch;
• said logic controller connects to the anode and cathode of said second LED-lamp bunch, through said second P-type switching module, respectively;
• the cathode of said second LED-lamp bunch connects to the anode of said first LED-lamp group;
• the cathode of said first LED-lamp group connects to the anode of said second LED-lamp group;
• said logic controller connects to the cathode of said first LED-lamp group, through said first N-type driving module;
• the cathode of said second LED-lamp group connects to the anode of said third LED-lamp group;
• said logic controller connects to the cathode of said second LED-lamp group, through said second N-type driving module;
• the cathode of said third LED-lamp group connects to the anode of said fourth LED-lamp group;
• said logic controller connects to the cathode of said third LED-lamp group, through said third N-type driving module;
• said logic controller connects to the cathode of said fourth LED-lamp group, through said fourth N-type driving module.