CN202756968U

CN202756968U - Light-emitting diode (LED) lamp

Info

Publication number: CN202756968U
Application number: CN2012204050805U
Authority: CN
Inventors: 曹承朝; 刘德权; 吴巨
Original assignee: HUNAN PUSISAT OPTO TECHNOLOGY Co Ltd
Current assignee: HUNAN PUSISAT OPTO TECHNOLOGY Co Ltd
Priority date: 2012-08-16
Filing date: 2012-08-16
Publication date: 2013-02-27
Anticipated expiration: 2022-08-16

Abstract

The utility model discloses a light-emitting diode (LED) lamp which comprises a heat dissipating body of the lamp, a transparent cover arranged on the heat dissipating body, red-green-blue (RGB) chips arranged in the transparent cover, and an aluminum substrate formed by copper foil, an insulating layer and an aluminum plate in composite mode. Countersunk head holes are formed in the aluminum substrate by penetrating through the copper foil and the insulating layer. Each RGB chip is arranged in each countersunk head hole and fixed on the aluminum plate through a high thermal conductivity silver colloid layer. The LED lamp has the advantages that due to the fact that the RGB chips are directly fixed on the aluminum substrate, the number of thermal conductivity layers is decreased, contacting thermal resistance between the thermal conductivity layers is decreased, junction temperature is low, and heat dissipation efficiency is remarkably improved. Fluorescent powder coated on the chip, a polycarbonate (PC) lens on each chip and silica gel filled in the PC lenses are removed, grading is finished at one time through light emitted by the RGB chips, and therefore uniformity is increased while light loss is reduced, also, cost is reduced, and glare is decreased.

Description

A kind of LED light fixture

Technical field

The utility model relates to a kind of LED light fixture.

Background technology

Heat radiation and luminous intensity distribution in the design chips of LED light fixture are very important.The structure of existing LED light fixture as shown in Figure 1, the radiator 4 of light fixture is provided with PC cover (or cloche) 1, be provided with a plurality of lamp pearls 2 in the PC cover 1, lamp pearl 2 is fixed on the aluminium base 3, be applied on the aluminium base 3 to reduce the gap of 4 of aluminium base 3 and radiators with heat-conducting silicone grease 207 again, with screw aluminium base 3 be fixed on the radiator 4.Lamp pearl 2 as shown in Figure 2, comprise copper pedestal 206, be fixed on the chip 204 on the copper pedestal 206, be coated with fluorescent material 203 on the chip 204, fluorescent material 203 and glue prepare in proportion rear with some powder machine point on chip 204, recharge that silica gel 202 is rear to be covered with PC lens 201.

The heat radiation of existing LED light fixture chips 204, that chip 204 is fixed on the copper pedestal 206 by high heat conduction elargol 205, chip 204 is welded on the copper stent 208 by gold thread 210, copper stent 208 usefulness scolding tin 209 are welded on the copper pool 301, copper pedestal 206 contacts to reduce LED copper pedestal 206 and copper by the pool of the copper on heat-conducting silicone grease 207 and the aluminium base 3 301 again and moors 301 gap, copper pool 301 is pressed together on the aluminium sheet 303 by insulating barrier 302, and the below fills up the space of 4 of the radiators of aluminium base 3 and light fixture again by heat-conducting silicone grease 207.The heat radiation approach of light fixture heat: the radiator of chip-high heat conduction elargol-copper pedestal-heat-conducting silicone grease-copper pool-insulating barrier-aluminium sheet-heat-conducting silicone grease-light fixture.This radiator structure of LED light fixture, heat-conducting layer is many, and thermal contact resistance is large between the heat-conducting layer, junction temperature is high, radiating efficiency is very low.Use in the high-power LED illumination process in reality, because the heat that the chip thermal source discharges can not derive and shed effectively, cause the problems such as light efficiency is low, light decay is large, the life-span is short, therefore, can not well satisfy the demand of lighting.

The luminous intensity distribution of existing LED light fixture comprises the once light-distribution of lamp pearl 2 and the translucent cover secondary light-distribution of light fixture.Luminous intensity distribution approach: chip-fluorescent material+glue-filling gel-PC lens-translucent cover.As seen, what chip sent only reaches illuminating effect in the air by diffusing to behind which floor medium again, and light assembles relatively, uniformity be not fine, light loss is also larger comparatively speaking.

The utility model content

In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model provides a kind of LED light fixture that improves the chip cooling effect and improve light distribution effect, to prolong the life-span of light source and light fixture, increases the uniformity of light when effectively reducing light loss.

The technical scheme that realizes the employing of the utility model purpose is as follows:

The LED light fixture that the utility model provides comprises the radiator of light fixture, the translucent cover that radiator is provided with (comprising PC cover or cloche, lens etc.), is located at RGB chip in the translucent cover, by copper pool, insulating barrier, the compound aluminium base that consists of of aluminium sheet; Have counter sink at described aluminium base through copper pool, insulating barrier, described RGB chip places in the described counter sink and by high heat conduction elargol layer and is fixed on the described aluminium sheet, described aluminium base is fixed on the radiator of light fixture, and the heat-conducting silicone grease layer is arranged between aluminium base and radiator.

Characteristics of the present utility model: the one, the RGB chip directly is fixed on the aluminium base, reduced heat-conducting layer, the heat radiation approach of light fixture heat: the radiator of chip-high heat conduction elargol-aluminium sheet-heat-conducting silicone grease-light fixture.This radiator structure has reduced that thermal contact resistance, junction temperature between the heat-conducting layer is low, radiating efficiency is significantly improved, and can effectively solve the problem that the prior art light efficiency is low, light decay is large, the life-span is short; The 2nd, cancelled the silica gel of filling in fluorescent material, the PC lens on the chip and the PC lens that cover on the chip, the direct disposable luminous intensity distribution of the light that utilizes the RGB chip to send out when reducing light loss, has increased uniformity like this, also reduce cost, reduced especially dazzle.The 3rd, reduced encapsulation step, simplified the technological process of production.

Further specify the technical solution of the utility model below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the structural representation of existing LED light fixture.

Fig. 2 is the structural representation of lamp pearl in the existing LED light fixture.

Fig. 3 is structural representation of the present utility model.

Fig. 4 is the structural representation of aluminium base in the utility model.

The specific embodiment

Referring to Fig. 3, Fig. 4, the LED light fixture that the utility model provides, the radiator 4 that comprises light fixture, the translucent cover that radiator 4 is provided with (comprises PC cover or cloche, lens etc.) 1, be located at the beam intensity ratio of the RGB chip 204(RGB in the translucent cover 1 by 3:6:1), by copper pool 301, insulating barrier 302, the aluminium base 3 of aluminium sheet 303 compound formations, see through copper pool 301 at described aluminium base 3, insulating barrier 302 has the taper counter sink (also can adopt rectangle, other shape such as cylindrical shape) 304, RGB chip 204 places in the described counter sink 304 and by high heat conduction elargol layer 205 and is fixed on the described aluminium sheet 303, the bottom of aluminium base 3 scribbles heat-conducting silicone grease layer 207 with the gap of minimizing with radiator, with conventional methods such as screw or riveted joints aluminium base 3 is fixed on the radiator 4 of light fixture.

Claims

1. LED light fixture, comprise light fixture radiator, translucent cover that radiator is provided with, be located at RGB chip in the translucent cover, by copper pool, insulating barrier, the compound aluminium base that consists of of aluminium sheet; It is characterized in that having counter sink at described aluminium base through copper pool, insulating barrier, described RGB chip places in the described counter sink and by high heat conduction elargol layer and is fixed on the described aluminium sheet, described aluminium base is fixed on the radiator of light fixture, and the heat-conducting silicone grease layer is arranged between aluminium base and radiator.