CN203517397U

CN203517397U - Side face back projection type LED panel light

Info

Publication number: CN203517397U
Application number: CN201320609117.0U
Authority: CN
Inventors: 庄其仁; 梁德娟; 赖丽萍
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2013-09-29
Filing date: 2013-09-29
Publication date: 2014-04-02
Anticipated expiration: 2023-09-29

Abstract

The utility model provides a side face back projection type LED panel light which comprises a frame, two LED lamp bars, a diffuser plate and a reflector plate, wherein the frame is arranged horizontally, the two LED lamp bars are arranged on the left and right opposite sides of the frame respectively, the diffuser plate is arranged on the upper side of the frame, and the reflector plate is arranged on the lower side of the frame. The lamp beads of the two LED lamp bars are arranged to illuminate inward and oblique upward corresponding to the diffuser plate. Thus, the side face back projection type LED panel light breaks through the structural pattern of a traditional LED panel light, no light guide plate structure is needed, when the side face back projection type LED panel light works, the upper side is a light emitting front face, the two LED lamp bars illuminate the diffuser plate directly in the inward and oblique upward modes, most light rays form even flat lights through scattering, the small parts of light rays irradiate on the reflector plate directly or indirectly can also be reflected and scattered through the diffuser plate, and finally an even and soft area light source can be formed. The defects of the traditional LED panel light that light is reflected for multiple times through a light guide plate and luminous efficiency is low are overcome, and compared with the prior art, the side face back projection type LED panel light is high in luminous efficiency, small in size, light in weight, novel and reasonable in structure, low in cost and strong in practicality.

Description

A kind of side back projection type LED flat lamp

Technical field

The utility model relates to LED light-emitting device field, is specifically related to the high and uniform side back projection type LED flat lamp of a kind of light emission rate.

Background technology

Along with semiconductor lighting industry is risen in the whole world, to have light efficiency high because of it for LED light source, and cost is low, and pollution-free, meet the advantages such as national energy-saving environmental protection theme, be more and more subject to people's favor, wherein LED flat lamp is owing to can keeping the integral body of building decoration unified and attractive in appearance, do not destroy light fixture setting, it is inner that light source is hidden building decoration, and light source does not expose, free from glare, light is soft, even, is widely used.LED flat lamp of a great variety, if the LED flat lamp based on liquid crystal (LCD) back light source technique is with its large area average illumination with without the feature of dazzling optical illumination, is mainly used in high-grade office building, office lighting.

But on market, the existing side based on LCD backlight source technology need adopt LGP according to formula LED flat lamp, the use of LGP has not only increased weight and the cost of flat lamp, and make the light sending from LED lamp bar first will be coupled to LGP, then after LGP multiple reflections, from the scattering object of exit surface, penetrate again, light, through being repeatedly coupled and reflecting and loss occurs, has reduced the light extraction efficiency of LED flat lamp.

In addition, although existing straight lower back projection type LED flat lamp is higher according to the light extraction efficiency of formula LED flat lamp than the side based on LCD backlight source technology, but it needs LED lamp pearl enormous amount, and the thickness of flat lamp is also difficult to reduce, therefore whole lamp manufacturing cost is high, volume is large, weight is large.

Given this, this case inventor further investigate the problems referred to above, then has this case to produce.

Utility model content

The purpose of this utility model is to provide a kind of light extraction efficiency high and uniform side back projection type LED flat lamp, and volume is little, lightweight, novel and reasonable structure, and cost is low, practical.

In order to achieve the above object, the utility model adopts such technical scheme:

A side back projection type LED flat lamp, comprises that horizontally disposed framework, two are divided into the LED lamp bar of framework left and right opposite side, are arranged at the diffuser plate of frame upper side and are arranged at the reflector of framework underside; Described in two the lamp pearl of LED lamp bar inwardly and obliquely corresponding described diffuser plate irradiate and arrange.

Each lamp pearl of two above-mentioned LED lamp bars is all equipped with reflector.

Above-mentioned lamp pearl above-mentioned LED lamp bar in the plane be projected as ellipse, and this oval-shaped major axis is parallel with the length direction of described LED lamp bar; Above-mentioned reflector forms the oval-shaped installing hole mating with described lamp pearl.

Above-mentioned diffuser plate is the surperficial diffuser plate that is formed with the PMMA material of directional light palisade striped.

Adopt after technique scheme, side of the present utility model back projection type LED flat lamp, break through the structural form of traditional LED flat lamp, it is without light conducting plate structure, during work, upside is that bright dipping is positive, two LED lamp bars are direct irradiation diffuser plate inwardly and obliquely, most of light forms uniform planar light through scattering, and the small part light being directly or indirectly radiated on reflector also can be reflected, through diffuser plate, shed, the final evenly soft area source that forms, because light is before diffuser plate penetrates, number of times through reflection is few, light loss is little, light emission rate is high, overcome traditional LED flat lamp through LGP multiple reflections and the defect such as light extraction efficiency is low, compared with prior art, side of the present utility model back projection type LED flat lamp, its light extraction efficiency is high, astigmatism is good, can form uniform planar light, environmental protection, novel and reasonable structure, volume is little, light reliable, cost is low, practical.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model except framework;

Fig. 2 is the cross-sectional schematic of the utility model except framework;

Fig. 3 is the cross-sectional schematic of another angle of the utility model except framework.

In figure:

1-LED lamp bar 11-lamp pearl

12-reflector 2-diffuser plate

3-reflector

The specific embodiment

In order further to explain, be described in detail the technical solution of the utility model below by specific embodiment.

A kind of side of the present utility model back projection type LED flat lamp, as Figure 1-3, comprises horizontally disposed framework (not shown), LED lamp bar 1, diffuser plate 2 and reflector 3.

Two LED lamp bars 1 are divided into the left and right opposite side of framework, and diffuser plate 2 is arranged at the upside of framework as exiting surface, and reflector 3 is arranged at framework underside as the back side; The lamp pearl 11 of two LED lamp bars 1 inwardly and obliquely corresponding diffuser plate 2 is irradiated and arranges, and two LED lamp bars 1 all have the minute angle of upwards lifting; The utility model is without light conducting plate structure, during work, two LED lamp bars 1 are direct irradiation diffuser plate 2 inwardly and obliquely, most of light forms uniform planar light through scattering, and the small part light being directly or indirectly radiated on reflector 3 also can be reflected, through diffuser plate 2, shed, the final evenly soft area source that forms, because light is before diffuser plate 2 penetrates, number of times through reflection is few, light loss is little, and light emission rate is high, overcomes traditional LED flat lamp through LGP multiple reflections and the defect such as light extraction efficiency is low.

In order to strengthen converging and directionality of LED lamp bar 1 light, preferably, each lamp pearl 11 of two LED lamp bars 1 is all equipped with reflector 12.

In order to form more evenly soft area source, preferably, lamp pearl 11 1 of LED lamp bar in the plane be projected as ellipse, and this oval-shaped major axis is parallel with the length direction of LED lamp bar 1; Reflector 12 is formed with the oval-shaped installing hole mating with lamp pearl 11, oval-shaped lamp pearl 11 can send the prolate light parallel with LED lamp bar 1 length direction, and the prolate light that each lamp pearl 11 sends forms the uniform overlay region of a plurality of light on diffuser plate 2, after diffuser plate 2 scatterings, light is more evenly soft.

Concrete form is such, and the utility model is when work, and on the one hand, the divergent beams that lamp pearl 11 sends, enter reflector, through reflector, converge on diffuser plate 2; Observe from the side, the light beam after reflector 12 converges is narrower, and from diffuser plate 2 top views, light beam is wider; Because light beam is undertaken directly projecting on diffuser plate 2 after back projection type optically focused by reflector 3, there is no the multiple reflections loss of LGP, so LED light outgoing efficiency of the present utility model is higher than the outgoing efficiency of general light guidance board type flat lamp;

On the other hand, centered by the installing hole of lamp pearl 11 and reflector 12, coaxially arrange, light beam after reflector 12 optically focused is plunderred and is penetrated on diffuser plate 2 with smaller angle (5-10 °), known according to the distribution curve flux of LED, the light beam that is radiated at diffuser plate 2 is less in the luminous intensity of the side near reflector 12, luminous intensity on the main shaft of reflector 12 and lamp pearl 11 is maximum, because the incidence angle (angles of light and diffuser plate 2 normals) of the latter's light is larger than the former, so the numerical values recited of the illumination in the unit are on this side can be accomplished substantially constant, and light beam is in the side away from reflector 12, because luminous intensity is little and incidence angle is large, therefore illumination is also little, so the central area of diffuser plate 2 is the stack of the light beam of two LED lamp bars 1, make illumination and the both sides of central area basically identical, again after the scattering process of diffuser plate 2, can obtain the area source that light is evenly distributed, so LED light of the present utility model outgoing is even, light is soft.

In order to strengthen the diffusion effect of diffuser plate 2, preferably, diffuser plate 2 is formed with the directional light palisade striped PMMA(polymethyl methacrylate of (each striped is parallel arrangement) for surface) diffuser plate of material, the thickness of diffuser plate 2 can be 1-2mm.

Side of the present utility model back projection type LED flat lamp, the form of diffuser plate and material etc. also can be adjusted and choose according to actual requirement; Lamp pearl is preferably the oval white LED lamp pearl of small-power 5mm, and the angle of divergence of outgoing beam is 30-60 °, and concrete form also can be adjusted and design according to actual requirement, and the quantity of lamp pearl also can be adjusted according to actual requirement; The outline line size of reflector and the angle between LED lamp bar and diffuser plate are that the size (being the light-emitting area of diffuser plate) according to framework designs, the light-emitting area of corresponding different diffuser plate, outline line size that can appropriate change reflector and the angle between LED lamp bar and diffuser plate thereof, make diffuser plate form scattering uniformly comprehensively thus; The concrete form of lamp pearl, LED lamp bar, reflector and the form that is connected between three etc. also can be adjusted and design according to actual requirement; LED lamp bar is preferably corresponding frame equal in length of its length and framework, and width is 6-8mm, and concrete size also can be adjusted and design according to actual requirement; The angle of inclination of lifting that LED lamp bar makes progress can be adjusted and design according to actual requirement; Framework is the frame structure of existing LED flat lamp, and its concrete structure can be cooperation the technical solution of the utility model and does adaptive structural adjustment.

Product form of the present utility model is not limited to this case diagram and embodiment, and anyone carries out suitable variation or the modification of similar thinking to it, all should be considered as not departing from patent category of the present utility model.

Claims

1. a side back projection type LED flat lamp, is characterized in that: comprise that horizontally disposed framework, two are divided into the LED lamp bar of framework left and right opposite side, are arranged at the diffuser plate of frame upper side and are arranged at the reflector of framework underside; Described in two the lamp pearl of LED lamp bar inwardly and obliquely corresponding described diffuser plate irradiate and arrange.

2. a kind of side according to claim 1 back projection type LED flat lamp, is characterized in that: each lamp pearl of two above-mentioned LED lamp bars is all equipped with reflector.

3. a kind of side according to claim 2 back projection type LED flat lamp, is characterized in that: above-mentioned lamp pearl above-mentioned LED lamp bar in the plane be projected as ellipse, and this oval-shaped major axis is parallel with the length direction of described LED lamp bar; Above-mentioned reflector forms the oval-shaped installing hole mating with described lamp pearl.

4. according to a kind of side back projection type LED flat lamp described in claim 1,2 or 3, it is characterized in that: above-mentioned diffuser plate is the surperficial diffuser plate that is formed with the PMMA material of directional light palisade striped.