CN201897133U

CN201897133U - LED desk lamp with high luminous efficiency and high color rendering property

Info

Publication number: CN201897133U
Application number: CN2010206575917U
Authority: CN
Inventors: 刘东芳
Original assignee: HEYUAN CHIUYUE OPTOELECTRONICS TECHNOLOGY Co Ltd
Current assignee: HEYUAN CHIUYUE OPTOELECTRONICS TECHNOLOGY Co Ltd
Priority date: 2010-12-14
Filing date: 2010-12-14
Publication date: 2011-07-13
Anticipated expiration: 2020-12-14

Abstract

The utility model discloses an LED (light-emitting diode) desk lamp with a high luminous efficiency and a high color rendering property, comprising a base (1), a bracket (2) and a metal radiating piece (3), wherein the base (1) is internally provided with a power supply; the bracket (2) is connected with the base (1) and the metal radiating piece (3); the metal radiating piece (3) is provided with a line layer and a plurality of arc-shaped grooves (4); the arc-shaped grooves (4) are internally provided with RGB (red, green and blue) three-base-color LED chips (5); the two sides of each arc-shaped groove (4) on the metal radiating piece (3) are provided with LED chip welding spots (6) which are electrically connected with the line layer; and the LED chip welding spots (6) are electrically connected with two poles of the RGB three-base-color LED chips (5) by leads. In the LED desk lamp disclosed by the utility model, the difficulty of the LED radiation is solved, the radiating path of the LED desk lamp is shortened, and the luminous efficiency, the color rendering property and the service life of an LED can be effectively improved.

Description

The LED desk lamp of high light efficiency and high-color rendering

Technical field

The utility model relates to a kind of lighting, specifically is meant the LED desk lamp of a kind of high light efficiency and high-color rendering.

Background technology

LED desk lamp structure mainly is made up of base, support, metal heat sink, power supply, led light source, and be applicable to readings, write, drawing, computer design, file are read and made comments etc. handled official business or learnt the place.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 desk 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 desk lamps.The heat radiation approach of whole desk 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, 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 desk 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 desk lamp 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 desk lamp, 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 desk lamp, in fact just need to solve the heat dissipation problem of LED, heat dissipation problem is the most scabrous key of LED desk lamp.

In addition, the preparation method of white light LEDs main flow is that blue-light LED chip excites the YAG:Ce3+ 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 YAG:Ce3+ 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 an a kind of difficult problem of the LED of solution heat radiation, shortens the heat radiation approach of LED, improves the LED light efficiency, improves the LED colour rendering, makes it send soft warm white light, does not hinder eyes, gives the comfortable LED desk lamp of human eye perceives.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the LED desk lamp of high light efficiency and high-color rendering, comprise base, support, metal heat sink, be provided with power supply in the base, the two ends of described support are hinged with base and metal heat sink respectively, described metal heat sink is provided with line layer, metal heat sink is provided with several circular grooves, be provided with RGB three-primary color 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 by lead the two poles of the earth with RGB three-primary color LED chip.

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

Be equiped with the frosted lampshade on the described metal heat sink.

Owing to adopted above-mentioned structure, the utility model is encapsulated into RGB three-primary color 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 " RGB three-primary color 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), aspect the production of LED desk lamp, because " RGB three-primary color LED chip " is potted directly on " metal heat sink ", can save raw material such as aluminium base and heat-conducting silicone grease, in the production of LED desk lamp, reduce by three road manufacturing procedures at least simultaneously, be suitable for the LED desk lamp and produce in batches;

(3), add the fluorescent material technology with traditional blue light and compare, adopt " RGB three-primary color LED chip " to be potted directly on " metal heat sink ", 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 " metal heat sink ", owing to do not need encapsulating materials such as fluorescent material, bad problems such as encapsulating material such as fluorescent material is aging can not occur, can solve the problem of colour temperature drift effectively;

(5), because " RGB three-primary color LED chip " is potted directly on " metal heat sink ", and the LED desk lamp reaches 80000 hours service life, as calculating by 8 hours every days, the theoretical life-span is more than 27 years, be common desk lamp 10-20 doubly, even higher;

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

(7), 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;

(8, the LED desk lamp switch response time is short, no stroboscopic phenomenon, low colour temperature (about 3000K), soft warm white light is not hindered eyes, and is comfortable to human eye perceives;

(9), the dustproof and waterproof grade that adopts of LED desk lamp is up to IP54, LED desk lamp light source electrical equipment is integrated, install simple, easy maintenance;

(10), since " RGB three-primary color LED chip " be potted directly on " metal heat sink ", effectively solved the heat dissipation problem of LED desk lamp, 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 desk lamp;

(11), can be more than 70% than conventional table Lantern Festival with illumination;

(12), because " RGB three-primary color 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 desk lamp work conducts to shell rapidly;

(13), the constant-current driving power supply of desk lamp has over-voltage over-current protection, the anti-surge surge protection of start, good functions such as EMI processing; Have the PFC circuit for rectifying, have higher power factor, improve the utilization rate of whole electrical network;

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

(15), the two ends of support are hinged with base and metal heat sink respectively, can adjust rising angle easily.

Description of drawings

Fig. 1 is the structural representation of the LED desk lamp of high light efficiency and 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 desk lamp of high light efficiency described in the utility model and high-color rendering, comprise base 1, support 2, metal heat sink 3, be provided with power supply in the base 1, the two ends of described support 2 are hinged with base 1 and metal heat sink 3 respectively, the damping location can be adopted in the hinged place, can adjust the rising angle of LED easily.Metal heat sink 3 is made by aluminium, and metal heat sink 3 peripheries are provided with fin.Described metal heat sink 3 is provided with line layer, metal heat sink 3 is provided with several circular grooves 4, be provided with RGB three-primary color LED chip 5 in the described circular groove 4, be filled with thermal conductive insulation glue between described RGB three-primary color LED chip 5 and the circular groove 4.Metal heat sink 3 is provided with the led chip solder joint 6 that is electrically connected with line layer in the both sides of each circular groove 4, led chip solder joint 6 is electrically connected by lead the two poles of the earth with RGB three-primary color LED chip 5.

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 outside LED and the metal heat sink firming body → lamp body, has reduced three roads heat radiation step.Adopt the good heat dissipation effect of the LED desk lamp of the utility model substrate, the temperature in the time of can effectively reducing RGB three-primary color LED chip operation can improve LED luminous efficiency, colour rendering 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

1. the LED desk lamp of high light efficiency and high-color rendering, it is characterized in that: comprise base (1), support (2), metal heat sink (3), base is provided with power supply in (1), the two ends of described support (2) are hinged with base (1) and metal heat sink (3) respectively, described metal heat sink (3) is provided with line layer, metal heat sink (3) is provided with several circular grooves (4), be provided with RGB three-primary color LED chip (5) in the described circular groove (4), metal heat sink (3) is provided with the led chip solder joint (6) that is electrically connected with line layer in the both sides of each circular groove (4), led chip solder joint (6) is electrically connected by lead the two poles of the earth with RGB three-primary color LED chip (5).

2. according to the LED desk lamp of described high light efficiency of claim 1 and high-color rendering, it is characterized in that: be filled with thermal conductive insulation glue between described RGB three-primary color LED chip (5) and the circular groove (4).

3. according to the LED desk lamp of claim 1 or 2 described high light efficiencies and high-color rendering, it is characterized in that: described metal heat sink is equiped with the frosted lampshade on (3).