CN202040598U - High-lighting effect light-emitting diode (LED) fluorescent tube - Google Patents

Abstract

The utility model discloses a high-lighting effect light-emitting diode (LED) fluorescent tube, which comprises a metal heat dissipation piece (1) and a lampshade (2), wherein both ends of the metal heat dissipation piece (1) are provided with a lamp cap (5). The high-lighting effect LED fluorescent tube is characterized in that the metal heat dissipation piece (1) is provided with a circuit layer; the metal heat dissipation piece (1) is provided with a plurality of circular arc-shaped grooves (3); an LED chip (4) is arranged in each circular arc-shaped groove (3); the metal heat dissipation piece (1) is provided with LED chip welding spots (6) at both sides of each circular arc-shaped groove (3), wherein the LED chip welding spots are electrically connected with the circuit layer; and the LED chip welding spots (6) are electrically connected with the two poles of the LED chip (4) through leads. According to the high-lighting effect LED fluorescent tube, the LED chips are encapsulated into the metal heat dissipation piece to form an LED and metal heat dissipation piece solidified body, thus, the heat dissipation steps are reduced. The high-lighting effect LED fluorescent tube has a good heat dissipation effect, is capable of effectively reducing the temperature when the LED chips work and is capable of performing a good action on improving the lighting effect of the LED and prolonging the service life of the LED.

Description

The LED fluorescent tube of high light efficiency

Technical field

The utility model relates to a kind of lighting, specifically is meant a kind of LED fluorescent tube of high light efficiency.

Background technology

LED fluorescent tube structure mainly is made up of lampshade, metal heat sink, power supply, led light source.Along with the semi-conductor industry development of technology, the light emitting diode cost performance improves day by day, and it is trend of the times that the LED fluorescent tube replaces traditional fluorescent tube.

At present, on the market on the substrate (as aluminium base) of the most weld metal material of the LED of all LED fluorescent tubes.The heat radiation approach of whole fluorescent tube: outside LED → pcb board (aluminium base) → thermal conductive insulation glue → metal shell → lamp body.Though metal substrates such as aluminium base have very good heat conductivility and high-intensity electrical insulation properties, but the heat radiation approach is oversize, the heat that LED produces is difficult for getting rid of, cause the LED junction temperature to raise, the rising of LED junction temperature can make transistorized current amplification factor increase sharply, cause collector current to increase, junction temperature is further raise, finally cause the LED light efficiency to descend until inefficacy.In addition, the LED fluorescent tube is under the high temperature work for a long time, can cause bad phenomenon such as insulating properties degeneration, components and parts damage, the heat ageing of material, low melting point weld cracking, the solder joint of fluorescent tube come off.

In addition, the Heat Conduction Material that in heat radiation, adopts, a lot of LED manufacturers still use heat-conducting silicone grease as the heat conduction packing material always.The heat-conducting silicone grease that adopts is as the heat conduction packing material, it is along with the light fixture working time prolongs, and the main component silicone oil volatilization slowly of the inside becomes dry to the end, its heat conductivility will reduce greatly, has dispelled the heat affecting the normal of light fixture. and at this moment the life-span of light fixture is also and then influenced.

Radiating treatment has become one of vital challenge in the design of LED fluorescent tube, promptly tighten at framework, under the more and more littler situation in operating space, how to solve the heat radiation of LED, the heat that PN junction is produced can distribute as soon as possible, not only can improve the luminous efficiency of product, also improve reliability of products and life-span simultaneously; In view of LED to the having relatively high expectations of radiating condition, the limit value if the PN junction junction temperature is above standard, LED will aggravate light decay, reduces luminous efficiency, even quits work.So, improve the light efficiency of LED fluorescent tube, in fact just need to solve the heat dissipation problem of LED.

The utility model content

The purpose of this utility model is to provide the heat dissipation problem of a kind of LED of solution to improve the LED fluorescent tube of LED luminous efficiency.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the LED fluorescent tube of high light efficiency, comprise aluminum metal radiating piece and lampshade, the two ends of metal heat sink are provided with lamp holder, described metal heat sink is provided with line layer, described metal heat sink is provided with several circular grooves on the one side of line layer, be provided with led chip in the described circular groove, metal heat sink is provided with the led chip solder joint that is electrically connected with line layer in the both sides of each circular groove, the led chip solder joint is electrically connected with the two poles of the earth of led chip by lead.

Be filled with thermal conductive insulation glue between described LED and the circular groove.

Owing to adopted above-mentioned structure, the utility model is encapsulated into led chip in the metal heat sink, forms LED and metal heat sink firming body, and it has following beneficial effect:

(1), directly is encapsulated on " metal heat sink " owing to " led chip ", take the vertical, horizontal radiating treatment, area of dissipation increases, and can effectively solve the drawback of the heat radiation difficulty of LED existence, junction temperature when having effectively reduced LED work avoids causing the irreversibility light decay;

(2), because " led chip " is potted directly on " metal heat sink ", can save raw material such as aluminium base and heat-conducting silicone grease, simultaneously in the production of LED fluorescent tube, reduced by three road manufacturing procedures at least, be suitable for the LED fluorescent tube and produce in batches;

(3), because " led chip " is potted directly on " metal heat sink ", and the LED fluorescent tube reaches 80000 hours service life, as calculating by 8 hours every days, the theoretical life-span is more than 27 years, be the general lighting lamp 10-20 doubly, even higher;

(4), LED is cold light source, photochromic soft, free from glare contains some pernicious gases (as containing poisonous mercury vapour in the fluorescent lamp) unlike other light source, and the recyclable utilization of LED waste products, is real green energy conservation product;

(5), led light source is a kind of high hardness resin illuminator, and lampshade is damaged material easily such as non-glass, so seismic force is higher relatively, the environment temperature adaptive faculty is strong;

(6), the LED fluorescent tube, need not starter and ballast, start soon, power is little, no stroboscopic is not easy visual fatigue, energy-conserving and environment-protective;

(7), the dustproof and waterproof grade that adopts of LED fluorescent tube is up to IP54, LED fluorescent tube light source electrical equipment is integrated, install simple, easy maintenance.

(8), since " led chip " be potted directly on " metal heat sink ", effectively solved the heat dissipation problem of LED fluorescent tube, improve the LED luminous efficiency exactly; Under this prerequisite, sustainment rate 〉=96% of sustainment rate 〉=98%, the 10000 hour luminous flux of 5000 hours luminous fluxes of LED fluorescent tube;

(9), than energy-conservation more than 70% with traditional fluorescent tube (as fluorescent lamp) of illumination;

(10), because " led chip " is potted directly on " metal heat sink ", and the heat radiation approach shortens, and light fixture adopts the directional type radiating treatment, the heat that produces when making fluorescent tube work conducts to shell rapidly;

(11), lampshade adopts nanometer abrasive material, the light free from glare that light fixture sends.

Description of drawings

Fig. 1 is the structural representation of the LED fluorescent tube of high light efficiency.

Fig. 2 is the sectional view of the LED fluorescent tube of high light efficiency.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.

As depicted in figs. 1 and 2, the LED fluorescent tube of high light efficiency described in the utility model, comprise metal heat sink 1 and lampshade 2, the two ends of metal heat sink 1 are provided with lamp holder 5, described metal heat sink 1 is provided with line layer, described metal heat sink 1 is provided with several circular grooves 3, is provided with led chip 4 in the described circular groove 3, is filled with thermal conductive insulation glue between described led chip 4 and the circular groove 3.Metal heat sink 1 is provided with the led chip solder joint 6 that is electrically connected with line layer in the both sides of each circular groove 3, led chip solder joint 6 is electrically connected by lead the two poles of the earth with led chip 4.

The utility model is when concrete encapsulation, circular groove is set on metal heat sink, led chip is placed in the circular groove, between led chip and circular groove, fill thermal conductive insulation glue, in the both sides of circular groove the led chip solder joint is set, the led chip solder joint is electrically connected with the line layer of metal heat sink, and the P of led chip, the N utmost point require to make copper foil circuit in metal heat sink according to actual production by playing the gold thread connection or deciding machine group with group and decide to the led chip solder joint then.Take this method for packing, led chip and metal heat sink become a LED and metal heat sink firming body.Compare with traditional outer heat radiation approach of LED → pcb board (aluminium base) → thermal conductive insulation glue → metal shell → lamp body, the utility model heat radiation approach is for outside LED and the metal heat sink firming body → lamp body, the step of only need dispelling the heat together just can solve the heat dissipation problem of LED illuminating lamp.Adopt the light fixture good heat dissipation effect of such method for packing, the temperature when effectively reducing led chip work can improve LED luminous efficiency and service life effectively.

In a word; though the utility model has exemplified above-mentioned preferred implementation; but should illustrate; though those skilled in the art can carry out various variations and remodeling; unless such variation and remodeling have departed from scope of the present utility model, otherwise all should be included in the protection domain of the present utility model.

Claims (2)

1. the LED fluorescent tube of a high light efficiency, comprise metal heat sink (1) and lampshade (2), the two ends of metal heat sink (1) are provided with lamp holder (5), it is characterized in that: described metal heat sink (1) is provided with line layer, described metal heat sink (1) is provided with several circular grooves (3), be provided with led chip (4) in the described circular groove (3), metal heat sink (1) is provided with the led chip solder joint (6) that is electrically connected with line layer in the both sides of each circular groove (3), led chip solder joint (6) is electrically connected by lead the two poles of the earth with led chip (4).

2. according to the LED fluorescent tube of the described high light efficiency of claim 1, it is characterized in that: be filled with thermal conductive insulation glue between described led chip (4) and the circular groove (3).