CN201198966Y

CN201198966Y - LED light fitting

Info

Publication number: CN201198966Y
Application number: CNU2008200457996U
Authority: CN
Inventors: 樊邦弘
Original assignee: Heshan Lide Electronic Enterprise Co Ltd
Current assignee: Heshan Lide Electronic Enterprise Co Ltd
Priority date: 2008-03-31
Filing date: 2008-03-31
Publication date: 2009-02-25
Anticipated expiration: 2018-03-31

Abstract

The utility model discloses an LED lamp which comprises a lamp housing and an LED module which is arranged in the lamp housing, and the LED module comprises at least three types of a white light LED, a red light LED and a green light LED. As light contains red and green spectra, the color rendering index thereof is higher than the LED with only two colors; as the LED lamp adopts the method of using the white light LED to be matched with the red light LED and the green light LED to control the color temperature, the lighting effect is not affected by fluorescent powder, so the lighting effect is higher than the similar products under the situation of the same low color temperature.

Description

A kind of LED light fixture

Technical field

The utility model relates to a kind of light fixture, particularly a kind of light fixture that uses LED as light source.

Background technology

LED means light emitting diode from the abbreviation of English LIGHT EMITTING DIODE.The simplest light-emitting diode structure comprises, P-type semiconductor, N-type semiconductor and formed between the two PN junction are when electric current passes through diode, at above-mentioned PN junction place, just produce electric charge carrier, i.e. electronics and hole, electronics combines with the hole and gives off energy with the form of photon.The LED lamp compare with white lights such as common tengsten lamp, fluorescent lamps have life-span length, power saving, durable, firm, reaction is fast, low used heat and be suitable for advantage such as batch process, thereby be able to promote at lighting field gradually.

But find but that in the process of promoting employing LED is that the light fixture of light source exists a lot of technical bottlenecks simultaneously, many optical parametrics are difficult to surmount traditional light fixture, and this also is up till now for can't replace the reason of conventional lamp fully to the LED light fixture.Such as colour rendering index, LED light is monochromatic light, can't reduce the true colors of irradiated object, the cross-color of object is serious under the monochromatic light irradiation, though now a lot of technology adopt the method for mixed light to produce white light LEDs, the white light LEDs that adopts blue wafer and YAG yellow fluorescent powder method to make as Japanese Ri Ya company, because only contain blueness and yellow spectrum in its white light, colour rendering index still is significantly less than conventional lamp, the white light LEDs that also has the method manufacturing of some RGB three wafers or fluorescent material, cost is very high though its colour rendering index increases, and the problem that the white light LEDs of these three primary colours all exists decay to differ, so also not in general lighting field large-scale popularization.There is technical problem on white light LEDs light efficiency and the colour temperature too, the white light LEDs of low colour temperature can be built warm ambiance, in occasions such as furniture a large amount of demands is arranged, but because the characteristic of fluorescent material launching efficiency, the light efficiency of low color temperature white light LED also can't be accomplished the same with high color temperature white light LED high at present on encapsulation technology, therefore, the light efficiency of raising low color temperature white light LED light fixture has also just become a solid demand of industry.

Summary of the invention

The technical problems to be solved in the utility model is: provide a kind of low colour temperature, high color rendering index (CRI), the white light LEDs light fixture of high light efficiency.

The utility model solves above-mentioned technical problem by following technical proposals:

A kind of LED light fixture comprises lamp housing and is installed in LED module in the lamp housing, and described LED module comprises three kinds of white light LEDs, red-light LED and green light LEDs at least.

The beneficial effects of the utility model are that owing to comprise the red-green glow spectrum in the light, its colour rendering index is than the LED height that two kinds of colors are only arranged; Because adopt white light LEDs to join the method control colour temperature of ruddiness green light LED, its light efficiency is not subjected to the influence of fluorescent material, thus under the situation of hanging down colour temperature equally than like product light efficiency height.Below be partial test parameter of the present utility model: the zone of light color on chromatic diagram is: x:0.34 y:0.37, x:0.43 y:0.36, x:0.35 y:0.42, x:0.43 y:0.4, colour rendering index is low by 80, colour temperature 3500K about, light efficiency is not less than 501m/W.

The utility model can also be done following improvement:

The light strength ratio of described white light LEDs, red-light LED and green light LED is 7～8:1.4～2:1.

The light strength ratio of described white light LEDs, red-light LED and green light LED further is set to 7:2:1.

Also be provided with astigmatism plate before the described LED module.

Be connected with radiating fin on the described LED module.

The zone of described light color on chromatic diagram is: x:0.34 y:0.37, x:0.43 y:0.36, x:0.35 y:0.42, x:0.43 y:0.4.

Description of drawings

Fig. 1 is an overall structure schematic diagram of the present utility model;

Fig. 2 is the cutaway view of Fig. 1;

Fig. 3 is a decomposition texture schematic diagram of the present utility model;

Fig. 4 is the zone of light color of the present utility model on chromatic diagram.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described further,

A kind of LED light fixture comprises lamp housing 1 and is installed in the interior LED module 2 of lamp housing that described LED module comprises white light LEDs, green light LED and red-light LED at least.

With reference to Fig. 1, Fig. 2 and Fig. 3, lamp housing 1 is for having the cylindric of concentration structure, inwall be coated with reflectorized material or directly polishing to having good reflection action.LED module 2 comprises aluminium base 21 and the plurality of LEDs 22 that is installed on the aluminium base 21, at least comprise three kinds of white light LEDs, red-light LED and green light LEDs in the plurality of LEDs 22, the colour temperature of regulating light fixture by the luminous ratio of regulating white light LEDs, red-light LED and green light LED three, colour temperature is about 3500K, preferred light intensity ratio is: white light: ruddiness: green glow=8～15:1:1, wherein Zui Jia ratio is 7:2:1.As shown in Figure 4, the zone of light color on chromatic diagram is: x:0.34y:0.37, x:0.43 y:0.36, x:0.35 y:0.42, x:0.43 y:0.4 is owing to comprise the red-green glow spectrum in the light, so its colour rendering index is than only containing two kinds of color LED height, adopt white light LEDs to join the method control colour temperature of ruddiness green light LED, its light efficiency is not subjected to the influence of fluorescent material, thus under the situation of hanging down colour temperature equally light efficiency than like product light efficiency height.For making light softer evenly, can also be that the light-emitting window of lamp housing 1 is provided with astigmatism plate 7 before the LED module.Aluminium base 21 tops can also be provided with heat-conducting plate 3, connect radiating fin 4 on the heat-conducting plate 3 again, help improving radiating efficiency like this when using high-capacity LED.Install for convenient, can also top cover 5 be set, hook 6 is set on the top cover 5 on radiating fin 4 tops.

Claims

1. LED light fixture, comprise lamp housing and be installed in the interior LED module of lamp housing, it is characterized in that: described LED module comprises three kinds of white light LEDs, red-light LED and green light LEDs at least, and the light strength ratio of described white light LEDs, red-light LED and green light LED is 7～8:1.4～2:1.

2. a kind of LED light fixture according to claim 1 is characterized in that: also be provided with astigmatism plate before the described LED module.

3. a kind of LED light fixture according to claim 1 is characterized in that: be connected with radiating fin on the described LED module.