Patent ID: 7802913
Filing Date: 2010-09-28
Classification: F21K,F21S,F21Y

Abstract:
1. A high efficiency LED lamp comprising: a positioning frame base having a fixing frame and a base plate; said fixing frame being a rectangular frame having peripheral edge portions bent inwardly forming two opposing first sheets and two opposing second sheets, said fixing frame forming a cavity, each said second sheet having an edge portion bent outwardly forming a combining member; said base plate having its peripheral edge portions bent to form narrow sheets and defining an accommodating space, wherein said base plate is disposed on an inner side of said first and second sheets of said fixing frame; LED bars respectively each composed of a plurality of LEDs soldered onto a respective plate, said LED bars attached to inner walls of said narrow sheets of said base plate of said positioning frame base; a light guide plate including a transparent plate having a dot pattern formed on a major side surface and a light guide emission face formed opposite the dot pattern, said LED bars positioned along the edge of the light guide plate; wherein the accommodating space of said base plate receives said light guide plate with said LED bars; and a power supply unit disposed at a rear side of said base plate of said positioning frame base, said power supply unit including a distributor for receiving and properly shunting AC/DC power, said distributor being connected to a DC conversion circuit for outputting DC power to said LED bars.