LED fluorescent lamp

Abstract

The invention discloses a light-emitting diode (LED) fluorescent lamp, which comprises a shell, a plurality of LEDs and a circuit board which is electrically connected with the LEDs, wherein the circuit board is formed on the shell integrally; and the LEDs are welded on the shell and are electrically connected with the circuit board. The shell of the LED fluorescent lamp is an integrated shell which integrates heat dissipation and the circuit board, and can improve the radiating efficiency, so that heat generated by the LEDs can be conducted out quickly to reduce the attenuation aging of a luminous chip due to overhigh temperature; and the shell integrates the heat dissipation and the circuit board, so the assembly process can be simplified substantially, namely the LEDs are needed to be welded on the integrated shell only without coating heat conducting glue, adding heat conducting silica gel mats, assembling the circuit board like the conventional LED fluorescent lamp. Each LED monomer on the LED fluorescent lamp has a polycrystal-parallel encapsulation structure, so the luminance and color-rendering properties of the white LEDs can be improved effectively.

Description

technical field [0001] The invention relates to a fluorescent lamp tube, in particular to an LED fluorescent lamp tube. Background technique [0002] The traditional fluorescent lamp emits ultraviolet light through the conduction of the gas (argon and mercury vapor) between the filaments, so that the phosphor powder coated on the inner wall of the lamp tube emits soft visible light. Traditional fluorescent lamps have the following defects: A. The fluorescent tube contains heavy metals such as mercury. The heavy metals released after bursting will cause environmental pollution and harm to the human body, which does not meet the current environmental protection requirements; B. The light is not stable enough. It will flicker according to the working frequency of the power grid, which is harmful to human eyes; C. It is difficult to light up when the voltage is low when it is started by a large current; The inverter structure has low power and high power consumption, resulting ...

AI Technical Summary

Problems solved by technology

Traditional fluorescent lamps have the following defects: A. The fluorescent tube contains heavy metals such as mercury. The heavy metals released after bursting will cause environmental pollution and harm to the human body, which does not meet the current environmental protection requirements; B. The light is not stable enough. It will flicker according to the working frequency of the power grid, which is harmful to human eyes; C. It is difficult to light up when the voltage is low when it is started by a large current; The converter structure has low power and high power consumption, resulting in waste of energy

However, the existing LED fluorescent tubes have the following defects: A. Generally, 3528 series white LEDs are used. Due to the limitation of brackets and chips, the luminous flux generally cannot exceed 10LM, and the color rendering cannot reach more than 90 between 70-80; B. The circuit board with LED soldered is separated from the shell, and the heat is transmitted to the shell by the circuit board and air, which seriously hinders the conduction of heat and shortens the life of the LED. Between the board and the case, apply thermal paste or add a heat-conducting silicone pad to quickly conduct heat to the case. This assembly has the following disadvantages: First, if the thermal paste is applied unevenly during the assembly process, the silicone heat-conducting pad is uneven or The deformation of the circuit board will cause the heat to not be exported in time and affect the service life of the fluorescent tube. Second, due to the different thermal conductivity of each object and when the two objects are in contact, there will be a gap between the contact surfaces, which affects the heat. Fast conduction; C. The assembly process is more complicated, cumbersome and inefficient

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