LED (light emitting diode) fluorescent lamp

Abstract

The embodiment of the invention discloses an LED (light emitting diode) fluorescent lamp which comprises a fluorescent lamp tube, fluorescent lamp end covers and a constant current source circuit, wherein the fluorescent lamp end covers are installed at two ends of the fluorescent lamp tube; the constant current source circuit is connected between an LED lamp bank in the fluorescent lamp tube and the metal needles of the end covers, and is used for supplying electricity for the LED lamp bank. The LED fluorescent lamp is characterized in that the fluorescent lamp tube comprises a tube body; the tube body is composed of an arc-shaped metal sectional material and a transmitting lamp cover which is arranged above the metal sectional material; the part, which is positioned at the inner side of the tube body, of the metal sectional material is provided with a clamping groove; a flexible PCB (printed circuit board) which has bending radian same as that of the metal sectional material is buckled on the clamping groove; and the LED lamp bank is welded on the flexible PCB. The LED fluorescent lamp has good radiation performance, and the secondary grading effect of the LED is good.

Description

technical field [0001] The invention relates to the field of electronics, in particular to an LED fluorescent lamp. Background technique [0002] The huge advantages of energy saving and environmental protection of LED light sources make it have excellent application prospects in commercial lighting, and LED fluorescent lamps are the most widely used products in commercial lighting. As we all know, LED light sources generate a lot of heat while emitting light, so how to dissipate heat from the light source has always been a hot topic in the industry. figure 1 It shows a cross-sectional view of a commonly used LED fluorescent tube in the market. It can be seen from the figure that the LED fluorescent tube usually includes a lower arc-shaped aluminum plate 10 and a printed circuit buckled on the arc-shaped aluminum plate 10. Board (PCB, Printed Circuit Board) board 11, the LED light source 12 welded on the PCB board and the light-transmitting lampshade 13 covered on the arc-s...

AI Technical Summary

Problems solved by technology

but from figure 1 It can be seen that the PCB board installed with the LED light source is horizontally installed in the lamp tube, and the PCB is in horizontal contact with the aluminum plate, and its heat dissipation surface is only the contact plane of the two, and its heat dissipation effect is not good.

In addition, the PCB board is placed horizontally in the LED lamp tube, which is not conducive to the secondary light distribution of the light source.

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