CN203052253U

CN203052253U - Light-emitting diode (LED) lighting device

Info

Publication number: CN203052253U
Application number: CN2012205558523U
Authority: CN
Inventors: 罗海亮
Original assignee: Shaoxing Wen Jia Environmental Friendly Material Co Ltd
Current assignee: Shaoxing Wen Jia Environmental Friendly Material Co Ltd
Priority date: 2012-10-25
Filing date: 2012-10-25
Publication date: 2013-07-10
Anticipated expiration: 2022-10-25

Abstract

The utility model is suitable for the light-emitting diode (LED) lighting field, and provides an LED lighting device which comprises a circuit board; the circuit board is provided with a plurality of LED chips; the surface of each LED chip is provided with a protective glue layer; and a transparent fluorescent cover is arranged on the circuit board and covers the LED chips. The distribution of fluorescent powder in the transparent fluorescent cover and the uniformity of the thickness of the transparent fluorescent cover are more easily controlled, so that the distribution of fluorescent powder is more uniform, the phenomena including glare and uneven color and intensity of the emitted light can be avoided, the problem of poor white light consistency caused by uneven distribution of the fluorescent powder on the surfaces of the different chips when the plurality of LED chips are available can be solved, the yield is higher, the production efficiency is improved, and the cost is saved; and furthermore, the transparent fluorescent cover is far away from the LED chips, so that the LED chips can more rapidly dissipate heat, the conversion efficiency of the fluorescent powder is further improved, the luminous decay is reduced, the luminous efficiency is improved, and the service life of a lamp is prolonged.

Description

A kind of LED lighting device

Technical field

The utility model belongs to the LED lighting field, particularly a kind of LED lighting device.

Background technology

LED has environmental protection, the life-span is long, energy-efficient, volume is little, response is fast, adaptability reaches the good characteristics of security by force, is widely used in various productions, sphere of life.The LED lamp is a kind of widely used lighting, with reference to the accompanying drawings 1, tradition LED lamp generally includes a reflector 101, in reflector 101, led light source is set, this led light source adopts the form at the surface-coated fluorescent material 103 of led chip 102 usually, and this traditional structure has many defectives, on the one hand, apply fluorescent material or be mixed with fluorescent colloid at chip surface, the uniformity of fluorescent material is wayward, causes the wavelength conversion uneven easily, makes the photochromic coloured silk of outgoing and intensity inhomogeneous, easily cause dazzle and form hot spot, if have a plurality of chips simultaneously, the uniformity of fluorescent material thickness is difficult to hold on the different chips, also can cause the white light uniformity poor, influence yields, the substandard product that is eliminated has also caused the increase of cost.Prior art arranges the atomizing lampshade to play certain equal light action in the bright dipping side usually, and the light transmittance of the lampshade that still atomizes is relatively low, can cause brightness of illumination to descend again, and its resultant effect is unsatisfactory.On the other hand, chip is the direct heat source that produces heat, directly applies fluorescent material or fluorescent colloid at chip surface, certainly will cause the heat conduction bad, and then reduces the conversion efficiency of fluorescent material and accelerate light decay, influences light extraction efficiency and service life.

The utility model content

The purpose of this utility model is to provide a kind of LED lighting device, is intended to solve inhomogeneous and because the bad light decay problem that causes of heat radiation of traditional LED lamp emergent light.

The utility model is to realize like this; a kind of LED lighting device comprises a wiring board, is provided with a plurality of led chips at described wiring board; the surface of each described led chip is equipped with the protection glue-line, in being covered with transparent fluorescence cover on the described wiring board and outside described led chip.

As optimal technical scheme of the present utility model:

Described wiring board is strip, and a plurality of described led chip is along the length direction word order of described wiring board.

The horizontal section of described transparent fluorescence cover is semicircle.

Described led chip is blue-light LED chip, has yellow fluorescent powder in the described transparent fluorescence cover.

The LED lighting device that the utility model provides is provided with transparent fluorescence cover, the uniformity of the distribution of the fluorescent material in the transparent fluorescence cover and transparent fluorescence cover thickness is more easy to control, compare with direct structure at chip surface coating fluorescent material, because the distribution of fluorescent material is more even, and then avoided the phenomenon of dazzle and bright dipping color and intensity inequality, situation for a plurality of led chips, can not occur because the problem of the white light uniformity difference that different chip surface fluorescent material inequalities cause yet, therefore this light fixture yields is higher, has improved production efficiency and has saved cost;

In addition, transparent fluorescence cover is conducive to the led chip quick heat radiating away from led chip, and then has improved the transformation efficiency of fluorescent material greatly, reduces light decay, improves light extraction efficiency, prolongs the service life of light fixture.

Description of drawings

Fig. 1 is the structural representation of LED lamp in the prior art;

Fig. 2 is the structural representation of the utility model embodiment LED lighting device;

Fig. 3 is the enlarged drawing of a-quadrant among Fig. 2;

Fig. 4 is the sectional view of the utility model embodiment LED lighting device.

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

Below in conjunction with specific embodiment specific implementation of the present utility model is described in detail:

Fig. 2 shows the structural representation of the utility model embodiment LED lighting device, and Fig. 3 shows the enlarged drawing of a-quadrant among Fig. 2, and Fig. 4 shows the sectional view of this LED lighting device, for convenience of explanation, only shows the part relevant with present embodiment.

With reference to figure 2 ~ 4, this LED lighting device mainly comprises a wiring board 1, is provided with a plurality of led chips 2 at wiring board 1, is provided with protection glue-line 3 on the surface of led chip 2, to prevent its oxidation deactivation.In addition, also be covered with a transparent fluorescence cover 4 on the wiring board 1, transparent fluorescence cover 4 constitutes closure casing with wiring board 1, led chip 2 is preferably disposed on the central authorities of wiring board 1, and then its centre of luminescence is positioned on the central shaft or the plane of symmetry of transparent fluorescence cover 4, guarantee the symmetry of transparent fluorescence cover 4 bright dippings.Transparent fluorescence cover 4 one side are for the protection of the led chip of inside; on the other hand; be mixed with fluorescent material 41 in the transparent fluorescence cover 4; can carry out the wavelength conversion; the illumination that led chip 2 sends is mapped on the transparent fluorescence cover 4; excite fluorescent material 41 wherein, make its light that sends another kind of wavelength, and mix with exciting light and then form white light.

Further with reference to figure 2, wiring board 1 specifically can be a kind of strip structure, and a plurality of led chips 2 form a strip source preferably along the length direction word order of wiring board 1, transparent fluorescence cover 4 then is long arch, and its horizontal section can be the arc of semicircle or non-semicircle.

This LED lighting device has a transparent fluorescence cover 4, the uniformity of fluorescent material 41 distributions in the transparent fluorescence cover 4 and the thickness of transparent fluorescence cover 4 is more easy to control, compare with direct structure at chip surface coating fluorescent material, because the distribution of fluorescent material is more even, and then avoided the phenomenon of dazzle and bright dipping color and intensity inequality, situation for a plurality of led chips, can not occur because the problem of the white light uniformity difference that different chip surface fluorescent material inequalities cause yet, therefore this light fixture yields is higher, has improved production efficiency and has saved cost.In addition, transparent fluorescence cover 4 is conducive to led chip 2 quick heat radiatings away from led chip 2, and then has improved the transformation efficiency of fluorescent material greatly, reduces light decay, improves light extraction efficiency, prolongs the service life of light fixture.

Further, transparent fluorescence cover 4 specifically can evenly mix the back by PC (Merlon) and fluorescent material and form, the concentration of fluorescent material 41 wherein can produce certain influence to the transformation efficiency of light wave, concentration is crossed the low or too high wavelength conversion that all can't carry out appropriateness, and then be difficult to obtain desirable white light, preferred as present embodiment, the mass ratio of PC and fluorescent material can be 1:0.08 ± 0.01, avoid fluorescent material 41 not enough or excessive, to obtain desirable white light.

Further, the led chip 2 in the present embodiment is preferably blue-light LED chip, and fluorescent material is yellow fluorescent powder, and namely by blue-light excited and produce the fluorescent material of gold-tinted, this fluorescent material 41 can mix the formation fluorescent colloid according to aforementioned proportion with PC.

In the present embodiment, the surface of wiring board 1 can have reflective membrane, and the light that is used for being mapped on the wiring board 1 reflects to transparent fluorescence cover 4, to improve light utilization, increases brightness of illumination.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. a LED lighting device is characterized in that, comprises a wiring board, is provided with a plurality of led chips at described wiring board, and the surface of each described led chip is equipped with the protection glue-line, in being covered with transparent fluorescence cover on the described wiring board and outside described led chip.

2. LED lighting device as claimed in claim 1 is characterized in that, described wiring board is strip, and a plurality of described led chip is along the length direction word order of described wiring board.

3. LED lighting device as claimed in claim 2 is characterized in that, the horizontal section of described transparent fluorescence cover is semicircle.

4. as claim 1,2 or 3 described LED lighting devices, it is characterized in that described led chip is blue-light LED chip.