CN201177211Y

CN201177211Y - Lens for LED energy conserving lamp

Info

Publication number: CN201177211Y
Application number: CNU2008200474436U
Authority: CN
Inventors: 肖成钢; 徐刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-07
Filing date: 2008-05-07
Publication date: 2009-01-07
Anticipated expiration: 2018-05-07

Abstract

The utility model discloses a novel lens used for an LED energy-saving lamp, belonging to the illuminating refractor technical field. In the novel lens used for the LED energy-saving lamp, a lens body (6) comprises a bottom surface (1), a top surface (2) and two side surfaces (3), wherein two sides of the top surface are connected with the bottom surface; the other two sides of the top surface is connected with the bottom surface through side surfaces; the middle part of the bottom surface is provided with a pit (4) where can be provided with an LED; a wall surface (5) of the pit forms an incident surface; the top surface surrounding the pit forms a fully reflecting surface which can fully reflect light entering from the incident surface to the two side surfaces; and the two side surfaces form an emergent surface. The novel lens can reasonably control light distribution, and light spots of the light emitted via the lens body are of a rectangular shape, and have clear edges and even illumination intensity. The novel lens for the LED energy-saving lamp can be widely applied to lighting fields with special requirements on lighting areas, such as road lighting, advertisement projection and the like.

Description

The new type lens that is used for the LED electricity-saving lamp

Technical field

The utility model belongs to the technical field of the refractor that throws light on, and specifically is meant a kind of new type lens of the LED of being used for electricity-saving lamp.

Background technology

At present, the street illumination light fixture mainly is sodium vapor lamp, mercury lamp or Metal halogen lamp, and these light fixtures have power consumption big, and the life-span is short, and shortcomings such as maintenance cost height can not adapt to the demand of social development.And LED (light emitting diode) light fixture has energy consumption low, and therefore the advantage that the life-span is long, adopts the LED tool to substitute the development trend that conventional lamp has become lighting field.

The LED energy-conserving road lamp usually can establish lens in the LED outside so that collected light, and the hot spot that existing lens focus on projection be a circle, and the illumination of each point of hot spot differs bigger, lack of homogeneity.Need in one direction to throw light on a large scale for some, and with the orthogonal direction of first direction on need the occasion of throwing light among a small circle, as road lighting, road lighting requires large-scale field of illumination on the road bearing of trend, then the field of illumination claimed range is less on the direction that vertical road extends.Lens light fixture for existing circular light spot LED, if reduce road cloth lamp quantity, will increase along the field of illumination on the road bearing of trend, and circular light spot LED lens, can only increase the illumination zone of both direction simultaneously, and the direction vertical with road do not need so big illumination zone, therefore causes very big waste.In addition, because dim spot can appear in circular light spot overlapping, so the road surface average illumination is low and the uniformity is poor, the illumination of this bright dark inequality influences driver's vision response and traffic safety.

The utility model content

It is good that technical problem to be solved by this invention provides a kind of light distribution effect, makes the LED street lamp meet the Illumination Distribution of road lighting and the new type lens that is used for the LED electricity-saving lamp of energy-conservation requirement.

For solving the problems of the technologies described above, the present invention adopts following technical scheme: the new type lens that is used for the LED electricity-saving lamp, lenticular body comprises bottom surface, end face and two s' side, the both sides and the bottom surface of described end face join, the other both sides of end face join by side and bottom surface, the middle part of described bottom surface is provided with a capable for LED and is installed on its interior pit, the hole wall of pit constitutes the plane of incidence, described end face constitutes around pit can be totally reflected to the light of plane of incidence incident two fully reflecting surfaces on the side, and described two sides constitute exit facet.

Described pit is the semicircle sphere.

Described pit is cylindrical.

The end face of described columniform pit is an arc surface.

Described end face is an arcwall face.

Described end face is the compound eye face that is made of little curved surface.

Described lenticular body is made by transparent PC material.

Described lenticular body is made by transparent PMMA material.

Owing to adopted above-mentioned structure, LED is installed in the pit at middle part of bottom surface, the light that LED sends is injected in the lenticular body through the plane of incidence that the hole wall constitutes, when the light of incident is mapped to the fully reflecting surface of end face formation, incidence angle can be mapped on two sides through total reflection greater than the light of critical angle, penetrate through two sides again, and incidence angle can directly reflect from end face less than the light of critical angle.The light that sends of LED has most to penetrate from the both sides of lenticular body like this, applicable to the situation that needs on the direction to throw light on a large scale.The utility model can rationally be controlled distribution of light, and the hot spot of the light that penetrates through lenticular body is rectangular, the hot spot edge clear, and illumination is very even, can be widely used in road lighting, advertisement light projector etc. have specific (special) requirements to the field of illumination lighting field.

Description of drawings

Fig. 1 is the stereogram of first kind of embodiment that is used for the new type lens of LED electricity-saving lamp;

Fig. 2 is the front view of first kind of embodiment that is used for the new type lens of LED electricity-saving lamp;

Fig. 3 is the cutaway view along A-A line among Fig. 1;

Fig. 4 is the new type lens when work light refraction diagram that is used for the LED electricity-saving lamp;

Fig. 5 is the cutaway view of second kind of embodiment that is used for the new type lens of LED electricity-saving lamp;

Fig. 6 is the cutaway view of the third embodiment that is used for the new type lens of LED electricity-saving lamp;

Fig. 7 is the stereogram of the 4th kind of embodiment that is used for the new type lens of LED electricity-saving lamp;

Fig. 8 is the stereogram of the 5th kind of embodiment that is used for the new type lens of LED electricity-saving lamp.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.

As Fig. 1, Fig. 2, shown in Figure 3, the new type lens that is used for the LED electricity-saving lamp described in the utility model, lenticular body 6 is made by transparent PC material or PMMA material, also can be made by transparent materials such as glass certainly, the general high material of preferred index.Described lenticular body 6 comprises bottom surface 1, end face 2 and two sides 3 of being located at both sides respectively.The both sides of described end face 2 and bottom surface 1 join, and the other both sides of end face 2 join by side 3 and bottom surface 1.The middle part of described bottom surface 1 is provided with a capable for LED and is installed on its interior pit 4, and the hole wall 5 of pit 4 constitutes the planes of incidence.Described end face 2 middle parts are lower, and two ends upwarp, whole become two arcwall faces be trapped among pit 4 around, end face 2 constitutes around pit 4 can be totally reflected to the light of plane of incidence incident two fully reflecting surfaces on the side 3, described two sides 3 constitute exit facets.

As shown in Figure 4, LED7 is installed in the pit 4 at middle part of bottom surface 1, the substrate of LED7 is against on the lower edge of pit 4.The light that LED7 sends is injected in the lenticular body through the plane of incidence that hole wall 5 constitutes, when the light of incident is mapped to the fully reflecting surface of end face 2 formation, incidence angle can be mapped on two sides 3 through total reflection greater than the light of critical angle, penetrate through two sides 3 again, and incidence angle can directly reflect from end face 2 less than the light of critical angle.The light that sends of LED7 has most to penetrate from the both sides of lenticular body 6 like this, applicable to the situation that needs on the direction to throw light on a large scale.

As Fig. 3, Fig. 5, shown in Figure 6, described pit 4 can be that the semicircle sphere is cylindrical, end face is the cylindrical of arc surface.

As Fig. 1 and shown in Figure 7, described end face 2 is an arcwall face, and wherein the arcwall face of Fig. 7 is made up of several little arcwall faces again, when light is mapped to the fully reflecting surface of end face 2 formation, can form diffuse reflection, the mixed light better performances.

As shown in Figure 8, described end face 2 is the compound eye faces that are made of little curved surface, when light is mapped to the fully reflecting surface of end face 2 formation, and the formed diffuse reflection of the structure of compound eye face, the mixed light performance is good, and illuminance uniformity is good.

Claims

1. new type lens that is used for the LED electricity-saving lamp, it is characterized in that: lenticular body (6) comprises bottom surface (1), end face (2) and two sides (3), the both sides of described end face (2) and bottom surface (1) join, the other both sides of end face (2) join by side (3) and bottom surface (1), the middle part of described bottom surface (1) is provided with a capable for LED and is installed on its interior pit (4), the hole wall (5) of pit (4) constitutes the plane of incidence, described end face (2) constitutes the fully reflecting surface that the light of plane of incidence incident can be totally reflected on two sides (3) around pit (4), and described two sides (3) constitute exit facet.

2. according to the described new type lens that is used for the LED electricity-saving lamp of claim 1, it is characterized in that: described pit (4) is the semicircle sphere.

3. according to the described new type lens that is used for the LED electricity-saving lamp of claim 1, it is characterized in that: described pit (4) is for cylindrical.

4. according to the described new type lens that is used for the LED electricity-saving lamp of claim 3, it is characterized in that: the end face of described columniform pit (4) is an arc surface.

5. according to claim 1 or 2 or the 3 or 4 described new type lens that are used for the LED electricity-saving lamp, it is characterized in that: described end face (2) is an arcwall face.

6. according to claim 1 or 2 or the 3 or 4 described new type lens that are used for the LED electricity-saving lamp, it is characterized in that: described end face (2) is the compound eye face that is made of little curved surface.

7. according to claim 1 or 2 or the 3 or 4 described new type lens that are used for the LED electricity-saving lamp, it is characterized in that: described lenticular body is made by transparent PC material.

8. according to claim 1 or 2 or the 3 or 4 described new type lens that are used for the LED electricity-saving lamp, it is characterized in that: described lenticular body is made by transparent PMMA material.