| 摘要 |
<p>PURPOSE: An LED operation apparatus is provided to control a power efficiency calibrator according to a current amount of an LED, thereby utilizing the output of the power efficiency calibrator as a boost circuit for LED operation. CONSTITUTION: An LED part(800) comprises an LED(810). A control part(600) uniformly controls a current supplied to the LED part by receiving current feedback of the LED part. A rectifier part(200) rectifies an AC power source(100). A power efficiency calibrator(300) controls power efficiency of power rectified in the rectifier part according to a control signal of the control part. A switching part(400) switches output power of the power efficiency calibrator according to the control signal of the control part. A transformer(500) converts power applied according to the switching operation of the switching part according to a predetermined winding ratio. A synthesizing part(700) rectifies both end current outputted in the transformer. An efficiency improvement part(900) acquires maximum efficiency improvement effects by changing an inductance value.</p> |
