CN202024132U

CN202024132U - LED illuminating device with good heat radiation and high color rendering property

Info

Publication number: CN202024132U
Application number: CN2011200540603U
Authority: CN
Inventors: 刘东芳
Original assignee: DONGGUAN YUANDA OPTOELECTRONIC TECHNOLOGY Co Ltd
Current assignee: DONGGUAN YUANDA OPTOELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2011-03-03
Filing date: 2011-03-03
Publication date: 2011-11-02
Anticipated expiration: 2021-03-03

Abstract

The utility model discloses an LED illuminating device with good heat radiation and high color rendering property. The LED illuminating device with good heat radiation and high color rendering property includes an aluminum substrate (1), a metal radiating piece (6) and several RGB three primary color LED chips (3). The front surface of the aluminum substrate (1) is provided with a line layer; the metal radiating piece (6) is contact to the back surface of the aluminum substrate (1); the front surface of the aluminum substrate (1) is provided with several grooves (2); the RGB three primary color LED chips (3) are packaged in the grooves (2); two sides of every groove (2) on the aluminum substrate (1) are provided with LED chip solder joints (4) which are electrically connected with the line layer; and the LED chip solder joints (4) are electrically connected with two poles of the RGB three primary color LED chips (3) through leads (5). In the utility model, the RGB three primary color LED chips are packaged in the aluminum substrate to form a firming body of the LED and the aluminum substrate, thus a heat radiation step is decreased, and color rendering property of an LED lamp is enhanced.

Description

The LED illuminating device of the good and high-color rendering of heat radiation

Technical field

The utility model relates to a kind of LED illuminating lamp device, specifically is meant a kind of LED illuminating device of dispel the heat good and high-color rendering.

Background technology

LED illuminating lamp 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 illuminating lamp replaces the traditional lighting lamp.

At present, on the market on the substrate (as aluminium base) of the most weld metal material of the LED of all LED illuminating lamps.The heat radiation approach of whole illuminating lamp: 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, and causes the LED junction temperature to raise.The rising of LED junction temperature can make transistorized current amplification factor increase sharply, and causes collector current to increase, and junction temperature is further raise, and finally causes LED to lose efficacy.In addition, the LED illuminating lamp 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 illuminating lamp come off.

Radiating treatment has become one of vital challenge in the design of LED illuminating lamp, promptly tighten at framework, under the condition of limited of 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, lowers efficiency, even quits work.So heat dissipation problem is the most scabrous key of LED illuminating lamp.

In addition, the preparation method of white light LEDs main flow is that blue-light LED chip excites yellow fluorescent powder.Can obtain the higher white light of luminous flux and luminous efficiency.Shortcoming is the white light that is difficult to obtain low colour temperature high-color rendering, owing to lack the ruddiness composition in the spectrum, so colour temperature height and colour rendering is poor.At present, the scheme that blue-light LED chip and yellow fluorescent powder mix is difficult to be implemented in 4, low colour temperature and Ra that 000K is following〉white light of 80 high-color renderings.The color drift of great power LED is not only by the aging institute of fluorescent material and is caused that main factor is the variation of material itself.Encapsulating material (as silica gel etc.) aging easily under the irradiation of ultraviolet light, the lost of life can cause the color drift of LED serious.Do not hinder eyes for the LED lamp is sent, give the comfortable warm white light of human eye perceives, just need to improve the LED colour rendering.

The utility model content

The purpose of this utility model is to provide a kind of LED illuminating device of dispel the heat good and high-color rendering, solves the difficult problem of LED heat radiation and colour rendering, shortens the heat radiation approach of LED illuminating lamp, improve the LED colour rendering, make the LED illuminating lamp send soft warm white light, do not hinder eyes, give human eye perceives comfortable.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the LED illuminating device of dispel the heat good and high-color rendering, comprise aluminium base, metal heat sink and several RGB three-primary color LED chips, the aluminium base front is provided with line layer, metal heat sink is attached on the back side of aluminium base, described aluminium base front is provided with several grooves, described RGB three-primary color LED chip is encapsulated in the groove, aluminium base is provided with the led chip solder joint that is electrically connected with line layer in the both sides of each groove, the led chip solder joint is electrically connected by lead the two poles of the earth with RGB three-primary color LED chip.

Be filled with thermal conductive insulation glue between described RGB three-primary color LED chip and the groove.

Described groove is a circular groove.

Described groove is a square groove.

Owing to adopted above-mentioned structure, the utility model adds the fluorescent material technology with traditional blue light and compares its light efficiency height, colour rendering index height, light decay is low, and the colour temperature drift is little, adopts the RGB three primary colours to mix luminous intensity distribution, regulate the proportioning of RGB three primary colours, can obtain versicolor light.Advantage is the efficient height, uses flexibly, since luminous all from three kinds of LED of red, green, blue, do not need to carry out the spectrum conversion, so its energy loss minimum, most effective.Simultaneously because the RGB three-primary color LED can be luminous separately, and its luminous intensity can regulate separately, so have higher flexibility.

The utility model forms " LED and aluminium base firming body " in " RGB three-primary color LED chip " integrated being encapsulated into " aluminium base ", can effectively shorten the heat radiation approach of LED lamp, and it has following beneficial effect:

(1), one or more groups " RGB three-primary color LED chip " is encapsulated on the aluminium base shortening heat radiation approach, good heat dissipation effect, LED work light efficiency height, long service life.

(2), " RGB three-primary color LED chip " takes distributed layout on same aluminium base, 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.

(3), add the fluorescent material technology with traditional blue light and compare, adopt " RGB three-primary color LED chip " to be potted directly on the aluminium base, its light efficiency height, the colour rendering index height, light decay is low.

(4), adding the fluorescent material technology with traditional blue light compares, adopt " RGB three-primary color LED chip " to be potted directly on the aluminium base, owing to do not need encapsulating material such as fluorescent material, bad problems such as encapsulating material such as fluorescent material is aging can not appear, can solve the problem of colour temperature drift effectively.

(5), since " RGB three-primary color LED chip " be potted directly on " aluminium base ", the LED illuminating lamp reaches 80000 hours service life.

(6), " groove " can carry out optically focused to LED, strengthens the directionality and the centrality of led light source, it is simple in structure, cost is low.

(7), LED is cold light source, photochromic soft, free from glare contains some pernicious gases unlike other light source, and the recyclable utilization of LED waste products, is real green energy conservation product.

(8), led light source is that a kind of high hardness resin illuminator but not tungsten filament glass etc. damage light source easily, so seismic force is higher relatively, the environment temperature adaptive faculty is strong.

(9), because " RGB three-primary color LED chip " is potted directly on the aluminium base, in the production of LED illuminating lamp, reduced one manufacturing procedure of " LED is welded on the aluminium base ", be suitable for the LED illuminating lamp and produce in batches.

(10), low colour temperature (about 3000K), soft warm white light is not hindered eyes, gives human eye perceives comfortable.

(11), since " RGB three-primary color LED chip " be potted directly on " aluminium base ", effectively solved the heat dissipation problem of LED illuminating lamp, sustainment rate 〉=96% of sustainment rate 〉=98%, the 10000 hour luminous flux of 5000 hours luminous fluxes of LED illuminating lamp.

Description of drawings

Fig. 1 dispels the heat well and the three-dimensional cutaway view of the LED illuminating device of high-color rendering.

The specific embodiment

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

As shown in Figure 1, the LED illuminating device of the good and high-color rendering of heat radiation described in the utility model comprises aluminium base 1, metal heat sink 6 and several RGB three-primary color LED chips 3.Aluminium base is made up of circuit layer (copper foil layer), heat conductive insulating layer and metal-based layer, and aluminium base has the excellent capacity of heat transmission, favorable mechanical processing characteristics and intensity, good capability of electromagnetic shielding, good magnetic force performance.Aluminium base 1 front is provided with line layer, and metal heat sink 6 is attached on the back side of aluminium base 1, and described aluminium base 1 front is provided with several grooves 2, and described groove 2 is circular grooves, also can be square groove.Described RGB three-primary color LED chip 3 is encapsulated in the groove 2, is filled with thermal conductive insulation glue between described RGB three-primary color LED chip 3 and the groove 2.Described aluminium base 1 is provided with the led chip solder joint 4 that is electrically connected with line layer in the both sides of each groove 2, led chip solder joint 4 is electrically connected with the two poles of the earth of RGB three-primary color LED chip 3 by lead 5.

The utility model is when concrete encapsulation, groove is set on aluminium base, RGB three-primary color LED chip is placed in the groove, between RGB three-primary color LED chip and groove, fill thermal conductive insulation glue, in the both sides of groove the led chip solder joint is set, the led chip solder joint is electrically connected with the line layer of aluminium base, and the P of RGB three-primary color LED chip, the N utmost point require to make aluminium base copper foil circuit at the copper foil layer of aluminium base 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, RGB three-primary color LED chip and aluminium base become a LED and aluminium base firming body.Compare with the outer heat radiation approach of LED → pcb board (aluminium base) → thermal conductive insulation glue → metal shell → lamp body, adopting the heat radiation approach of the illuminating lamp of this encapsulation technology design is outside LED and the aluminium base firming body → thermal conductive insulation glue → metal shell → lamp body, has reduced the step of dispelling the heat together.Adopt the good heat dissipation effect of the utility model encapsulated LED light fixture, the temperature in the time of can effectively reducing RGB three-primary color LED chip operation can play good effect to improving LED colour rendering and life-span.

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

1. one kind dispels the heat well and the LED illuminating device of high-color rendering, it is characterized in that: comprise aluminium base (1), metal heat sink (6) and several RGB three-primary color LED chips (3), aluminium base (1) front is provided with line layer, metal heat sink (6) is attached on the back side of aluminium base (1), described aluminium base (1) front is provided with several grooves (2), described RGB three-primary color LED chip (3) is encapsulated in the groove (2), aluminium base (1) is provided with the led chip solder joint (4) that is electrically connected with line layer in the both sides of each groove (2), led chip solder joint (4) is electrically connected with the two poles of the earth of RGB three-primary color LED chip (3) by lead (5).

2. the LED illuminating device of good according to the described heat radiation of claim 1 in high-color rendering is characterized in that: be filled with thermal conductive insulation glue between described RGB three-primary color LED chip (3) and the groove (2).

3. the LED illuminating device of good according to claim 1 or 2 described heat radiations in high-color rendering, it is characterized in that: described groove (2) is a circular groove.

4. the LED illuminating device of good according to claim 1 or 2 described heat radiations in high-color rendering, it is characterized in that: described groove (2) is a square groove.