CN203560826U

CN203560826U - Lampshade for daylight type LED lamp tube

Info

Publication number: CN203560826U
Application number: CN201320724840.3U
Authority: CN
Inventors: 侯李群
Original assignee: XIAMEN FLOW PHOTOELECTRIC Co Ltd
Current assignee: XIAMEN FLOW PHOTOELECTRIC Co Ltd
Priority date: 2013-11-13
Filing date: 2013-11-13
Publication date: 2014-04-23
Anticipated expiration: 2023-11-13

Abstract

The utility model relates to a lampshade for a daylight type LED lamp tube. A lampshade body is formed by transparent materials, the section of the lampshade body is of an arc structure, and buckling pins for locating are symmetrically formed on the two edges of the lampshade body respectively. The lampshade for the daylight type LED lamp tube is characterized in that the outer surface of the lampshade body is smooth, thin stripes are formed on the inner surface of the lampshade body, and are densely arranged, and the section of each thin stripe is of a circular-arc downwards-concave structure, so that concave lens light diffusion mirror surfaces are formed; the height of the circular arc of each thin stripe is smaller than 0.3mm, and the radius of the circular arc of each thin stripe is smaller than 0.6mm. The downwards-concave circular-arc-shaped thin stripes and especially asymmetrical downwards-concave thin stripes are designed on the inner surface of the lampshade body, and are densely arranged, the concave lens light diffusion mirror surfaces are formed, light diffusion is achieved, the light-emitting angles are more discrete, emergent light on the surface of the lampshade body is even, and the defect of glare of an LED light source is overcome; due to the fact that the similarly-semicircular-arc-shaped structure or the similarly-semiellipse-arc-shaped structure is adopted for the lampshade body, light intensity on the two sides is improved.

Description

A kind of daylight type LED fluorescent tube lampshade

Technical field:

The utility model belongs to lighting field, particularly a kind of improvement of daylight type LED fluorescent tube lampshade.

Background technology:

As everyone knows, its light efficiency of transparent lampshade is the highest, but it can know and see light source, concerning the LED lamp pearl of high brightness, exists obviously not enoughly, easily cause the injury of vision, and dazzle is serious.For this reason, LED light source adopts frosted lampshade mostly, realizes atomization diffusion, to improve rising angle, and adjusts optical uniformity.But design unreasonablely, especially the small faceted pebble printing opacity of lampshade rate variance, total reflection are serious, cause emergent light heterodyne, and brightness reduces.How to design LED lampshade, both met light diffusion needs, can reduce again the structure of total reflection, become the object of the utility model research.

Summary of the invention:

The purpose of this utility model is that a kind of inner surface of design forms the recessed stria of circular arc, can form the daylight type LED fluorescent tube lampshade of concavees lens light diffusion effect.

Technical solutions of the utility model are achieved in that a kind of daylight type LED fluorescent tube lampshade, lampshade is by high light-transmitting materials moulding, cross section camber structure, two edge symmetrical molding have the button pin of location use, it is characterized in that lampshade smooth outer surface, inner surface forms the stria of dense arrangement, and stria cross section is circular arc concave configuration, forms concavees lens light diffusion minute surface; Described stria crown height is less than 0.3mm, and radius is less than 0.6mm.

The arc surface of the stria of described lampshade inner surface is two circular arc compositions, and take lampshade median plane as boundary, the circular arc of every stria is constant towards the arc radius of median plane one side, away from the arc radius of median plane one side, successively decreases one by one.

Described lampshade is 0.4-0.6mm towards the arc radius of median plane one side, away from the arc radius of median plane one side, successively decreases one by one, and its decrement is 0.01-0.02mm.

Described lampshade cross section camber structure refers to it is that central area radius is large, toward two side areas radius, diminishes gradually, becomes class semi arch or class semiellipse arc structure.

The utility model lampshade adopts the diffusion material moulding of high transmission rate, inner surface is designed to the sunken arcs stria of dense arrangement, form complex trace concavees lens light diffusion minute surface, especially asymmetric recessed stria, realize the diffusion of light, lighting angle is more discrete, and lampshade surface bright dipping is more even, has eliminated LED light source dazzle defect; And lampshade employing class semi arch or class semiellipse arc structure, both sides light intensity is improved.

Accompanying drawing explanation:

Below in conjunction with concrete legend, the utility model is described further:

Fig. 1 lampshade schematic cross-section

Fig. 2 Fig. 1 X partial enlarged drawing

Fig. 3 lampshade optical path analysis figure

Fig. 4 Fig. 3 A point index path

Fig. 5 Fig. 3 B point index path

Fig. 6 Fig. 3 C point index path

Wherein

1-lampshade 2-buckle pin 3-stria

Y-median plane R-nearly circular arc R `-circular arc far away

The specific embodiment:

See figures.1.and.2, daylight type LED fluorescent tube lampshade, lampshade 1 is by transparent material moulding, cross section camber structure, this arcuate structure refers to it is that central area radius is large, toward two side areas radius, diminishes gradually, become class semi arch or class semiellipse arc structure, certainly also do not get rid of semi arch or semiellipse arc structure; 1 liang of edge symmetrical molding of lampshade has the inside pin 2 of buckleing, and lampshade 1 smooth outer surface, inner surface form the stria 3 of dense arrangement, and stria 3 cross sections are circular arc concave configuration, forms concavees lens light diffusion minute surface; Described stria 3 crown heights are less than 0.3mm, and radius is less than 0.6mm; More particularly, the arc surface of the stria 3 of lampshade 1 inner surface is two circular arc compositions, take lampshade median plane Y as boundary, the circular arc of every stria 3 is constant towards the arc radius of median plane Y mono-side, arc radius away from median plane Y mono-side successively decreases one by one, its parameter is that lampshade 1 is 0.4-0.6mm towards the arc radius of median plane one side, away from the arc radius of median plane one side, successively decreases one by one, and its decrement is 0.01-0.02mm.As Fig. 2, the circular arc of low beam cover 1 median plane Y mono-side, is called nearly circular arc R, and the circular arc of median plane Y mono-side far away, is called circular arc R ` far away.

Optical path analysis

With reference to Fig. 3 to Fig. 6, lampshade described in the invention is as above shown in Fig. 3, the curved surface that lampshade outer surface is smooth one, and inner side is the rough curved surface of intensive sunken arcs stria composition.Crown height is no more than 0.3 millimeter, and circular arc is no more than 0.6 millimeter, and arc radius becomes to successively decrease by median plane Y outside on one side one by one, and more past both sides are less.

As the local refraction of light path angle of Fig. 4, the light sending from LED, through after inner surface, the circular arc of different curvature reflects into the light of different angles, curvature larger (arc radius is less) refraction angle is larger, the angle of this sidelight is reformed larger, just has more light to be refracted to the left like this at the light in left side.As can be seen from the figure, after light is reflected by inner surface, produce and intersect, the angle of the light sending from lampshade surface is more discrete, and visually, light is more evenly soft.

As the local refraction of light path angle of Fig. 5, the light sending from LED, through after inner surface, the circular arc of different curvature reflects into the light of different angles, symmetrical spreading out.We also see that light is intersected by rear generation of adjacent stria arc surface refraction equally.

As the local refraction of light path angle of Fig. 6, the light sending from LED, through after inner surface, the circular arc of different curvature reflects into the light of different angles, curvature larger (arc radius is less) refraction angle is larger, the angle of this sidelight is reformed larger, just has more light to be refracted to the right like this at the light on right side.Light is angle spread and opens.

Lampshade as of the present invention in Fig. 3, the concavees lens that each stria forms, can be diffused as light larger angle, are symmetrical concavees lens at center, extend both sides, and concavees lens angle design becomes toward laterally inclined, can realize more light and send from the side.The lighting angle D that makes bright dipping, is greater than 180 degree.

Moreover, when the light that LED sends arrives lampshade inner surface, also have part light to be reflected back, the reflector (exceeding 90% reflectivity) of high reflectance is installed in inner side, light after being reflected by reflector again transmission to lampshade, thus, there is more light to go out lampshade on the one hand and send, on the other hand, from lampshade face, the angle of light is out more discrete, visual effect light is more even, soft, greatly improves glare problem.

Sum up:

1. according to lambertian, the subtended angle of the present invention from light source to lampshade edge is 45 degree, and Cos45=0.707. arrives the light of lampshade inner surface, edge also have a central light strength of 70%.Visually can not differentiate power.Can think that it is uniform that light arrives lampshade inner surface.

2. through the circular arc refraction of the different radians of inner surface, the light sending from outer surface any point is all the compound light of multiple angles, and lighting angle is discrete.The light sending from outer surface is like this just more even.Eliminated dazzle.

3. from reflector, being reflected back the light of lampshade, is also multiple angles, arrives lampshade, and after the circular arc refraction of different radians, discrete angle is overflowed from lampshade surface especially.In addition, the light being reflected by reflector, also has the translateral circular arc of part to reflect to larger angle, has increased overall lighting angle.

4. the result that actual product detects is analyzed as us.Whole lamp is luminous evenly soft, and lighting angle exceedes 200 degree, and average beam angle exceedes 120 degree.

Claims

1. a daylight type LED fluorescent tube lampshade, lampshade is by transparent material moulding, cross section camber structure, two edge symmetrical molding have the button pin of location use, it is characterized in that lampshade smooth outer surface, inner surface forms the stria of dense arrangement, and stria cross section is circular arc concave configuration, forms concavees lens light diffusion minute surface; Described stria crown height is less than 0.3mm, and radius is less than 0.6mm.

2. a kind of daylight type LED fluorescent tube lampshade according to claim 1, the arc surface that it is characterized in that the stria of lampshade inner surface is two circular arc compositions, take lampshade median plane as boundary, the circular arc of every stria is constant towards the arc radius of median plane one side, away from the arc radius of median plane one side, successively decreases one by one.

3. a kind of daylight type LED fluorescent tube lampshade according to claim 2, is characterized in that lampshade is 0.4-0.6mm towards the arc radius of median plane one side, away from the arc radius of median plane one side, successively decreases one by one, and its decrement is 0.01-0.02mm.

4. a kind of daylight type LED fluorescent tube lampshade according to claim 1 and 2, is characterized in that it is that central area radius is large that lampshade cross section camber structure refers to, toward two side areas radius, diminishes gradually, becomes class semi arch or class semiellipse arc structure.