| 摘要 |
A light module with linear LED serial group drive device comprises an AC input rectifier unit having an input end coupled to an AC Power to convert an AC half-wave voltage signal into a DC full-wave voltage signal for output, and an intelligent control having a protection unit. when the input voltage is higher than the set start voltage of the LED serial group, the corresponding constant current control drive circuit switch is turned on immediately by the intelligent control to control the power, luminous flux, and power factor of the LED serial light module for achieving stable power output of LED light source. Moreover, the present invention without transformers, inductors and other magnetic components has thin thickness and small volume to improve the conventional problems. |
| 主权项 |
1. A light module with linear LED serial group drive device, comprising:
an AC input rectifier unit having an input end coupled to an AC Power to convert an AC half-wave voltage signal into a DC full-wave voltage signal for output; an operating voltage control unit having a first end coupled to the AC input rectifier unit via a first passive element, and a second end coupled to ground via a second passive element; a microprocessor coupled to the operating voltage control unit; a dimming control unit coupled between the AC input rectifier unit, operating voltage control unit, and microprocessor; a current setting unit coupled to the microprocessor; an EMI suppression unit having an end coupled to an output end of the AC input rectifier unit via a third passive element, and another end coupled to the microprocessor; an LED serial light module composed of a plurality of LEDs serially connected to each other, the LED serial light module divided into one or more LED groups (L1˜Ln), and the LED serial light module having a current input end coupled to an output end of the DC full-wave voltage signal; one or more switch units corresponding to the LED groups (L1˜Ln) having one or more of switches (SW1˜SWn), and the switches (SW1˜SWn) having an end coupled to the microprocessor, and another end coupled to the current output end of the LED groups (L1˜Ln); whereby an intelligent control is composed of the operating voltage control unit, microprocessor, dimming control unit, current setting unit, EMI suppression unit, and the switch unit; the LED serial light module is divided into a plurality of the LED groups (L1˜Ln) which are respectively controlled by the input points of the switch unit; when the DC full-wave voltage signal is higher than the set voltage across the first LED group (L1), the first switch (SW1) of the switch unit is turned on for lighting on the first LED group (L1), and outputting the set current; when the DC full-wave voltage signal is higher than the set voltage across the first LED group (L1) and the second LED group (L2), the second switch (SW2) of the switch unit is turned on for lighting on the first LED group (L1) and the second LED group (L2), and outputting the set current; accordingly, the switches (SW1˜SWn) are turned on in sequence to control the power, luminous flux, and power factor of the LED serial light module. |
