CN205332087U - A many curved lens for LED table lamp - Google Patents

Abstract

The utility model relates to a many curved lens for LED table lamp, many curved lens for ellipsoid form, and the cross -section appears for the waist, many curved lens are a holistic refraction plane and grading curved surface including the combination, the refraction plane is waist shape plane, it sets up inside sunken refraction hemisphere face to reflect planar middle part, the ball center position of refraction hemisphere face be used for installing the LED light source, the grading curved surface be located the refraction planar below, the up end of grading curved surface is unanimous with the refraction aspect, and the up end is inwards sunken. Many curved lens eliminated the glare that LED table lamp produced completely when using for people's eye can not produce dazzlingly yet in desk lamp below, solve that current LED table lamp can lead to people's eye because light source and reflector and produce the problem of dazzling defect.

Description

A kind of many toroidal lenss for LED desk lamp

Technical field

This utility model relates to desk lamp technical field, particularly to the luminous intensity distribution of many toroidal lenss, and specifically a kind of many toroidal lenss for LED desk lamp。

Background technology

LED is environmental protection light source, has that voltage is low, life-span length, responds fast and energy-efficient feature, only needs 3-5 watt of power just can meet desk lamp lighting requirement, be the good light source making desk lamp。

Owing to current LED luminous efficiency is high, intensity of illumination is big, if the eyes of human body are too near near light source, will be easy to burn the eyes of people, the eyes of people are treated after a period of time under light source, it is easy for making people dazzling, if life-time service not past any encapsulation or through the LED light device of common encapsulation, this easily causes the damage of eye。

Meanwhile, if without any encapsulation or only through common encapsulation, the laser propagation effect of light will be substantially reduced LED light device, it is unfavorable for saving the energy and environmental protection。

Chinese Patent Application No. be 200710170553.1 descriptions be a kind of be changed luminous intensity distribution to the LED light fixture being light source, achieve distribution of not sharing the same light to need to carry out accurately limited luminous intensity distribution, and in this patent, due to adopt be multiple convex lens overlapping combinations together, the configuration to light source can be realized, but can not solve human eye from light source too close to and the defect that makes people dazzling, be unsuitable for human eye on the desk lamp close to light source or other illuminators。

Utility model content

The purpose of this utility model is to provide a kind of many toroidal lenss for LED desk lamp, described many toroidal lenss completely eliminate dazzle, make eye dazzling without producing below desk lamp, in order to solve existing LED desk lamp can cause human eye due to from light source too close to and the problem that produces dazzling defect。

For achieving the above object, scheme of the present utility model is: a kind of many toroidal lenss for LED desk lamp, described many toroidal lenss are ellipsoid shape, and cross section is kidney-shaped, described many toroidal lenss include plane of refraction and light distribution curved surface, described plane of refraction is as a whole with light distribution curved surface combination, and plane of refraction is positioned at the back side of many toroidal lenss, light distribution curved surface is positioned at the front of many toroidal lenss, described plane of refraction is kidney-shaped plane, the middle part of described plane of refraction arranges the refraction hemisphere face caved inward, the hemispherical sphere center position of described refraction is used for installing LED light source, the end face that described light distribution curved surface combines with plane of refraction caves inward。

Further, according to the many toroidal lenss for LED desk lamp described in the utility model, described many toroidal lenss are provided with installation limit, and described limit of installing is arranged at the periphery of plane of refraction, and described many toroidal lenss are fixed on the shell of LED desk lamp lamp body by installing limit。

Further, according to the many toroidal lenss for LED desk lamp described in the utility model, described many toroidal lenss adopt glass material。

Further, according to the many toroidal lenss for LED desk lamp described in the utility model, the lateral surface of described many toroidal lenss scribbles anti-reflection film。

The beneficial effect that this utility model reaches: by adopting many toroidal lenss of the present utility model; the LED desk lamp maintaining uniform illumination of design; completely eliminate dazzle; even if eye is dazzling without producing below desk lamp; human eye is made to be protected; the luminous utilization rate of light source can reach more than 90% simultaneously, and is all the place projecting and needing illumination, and the effective rate of utilization of light source luminescent is greatly improved。

Accompanying drawing explanation

Fig. 1 is the structural representation of the many toroidal lenss of this utility model；

Fig. 2 is the profile diagram of this utility model light distribution curved surface。

In figure, 1 is refraction hemisphere face, and 2 is plane of refraction, and 3 for installing limit, and 4 is technique curved surface, and 5 is light distribution curved surface。

Detailed description of the invention

Below in conjunction with accompanying drawing and specific embodiment, this utility model is described in further detail。

As shown in Figure 1, many toroidal lenss described in the utility model are ellipsoid shape, and cross section is kidney-shaped, described many toroidal lenss include plane of refraction and light distribution curved surface, described plane of refraction is as a whole with light distribution curved surface combination, and plane of refraction is positioned at the back side of many toroidal lenss, light distribution curved surface is positioned at the front of many toroidal lenss, described plane of refraction is kidney-shaped plane, the middle part of described plane of refraction arranges the refraction hemisphere face caved inward, the hemispherical sphere center position of described refraction is used for installing LED light source, the end face that described light distribution curved surface combines with plane of refraction caves inward。

Refraction hemisphere face is the hemisphere face of spill, is positioned at lens centre, reflects the hemispherical centre of sphere and overlap with plane of refraction, and LED light source is placed on the centre of sphere, it may ensure that the light of LED emission enters lens and reduces reflection loss。

If adopting the planar LED light source without once light-distribution, it is also possible to directly replace spill hemisphere face with plane of refraction。The refraction by plane of refraction of the light of LED emission, is directly entered lens, and the relatively larger light of angle of incidence has more reflection loss。

The present embodiment is also provided with installing limit, and described limit of installing is arranged at the periphery of plane of refraction, utilizes installation limit to be fixed on the shell of desk lamp lamp body by many toroidal lenss, can adjust the relative position of LED light source and lens simultaneously。

Light distribution curved surface adopts glass material, utilize the refraction principle of glass, free form surface is designed according to lighting requirement, the utilization rate that its feature is light is high, dazzle is completely eliminated, the theoretical glazing loss through glass refraction face is 4-5%, after the present embodiment plates anti-reflection film on glass, may decrease to 1%, the absorption loss water of glass is very little, and therefore the utilization rate of light can accomplish more than 90%, and illuminate region and can pass through design con-trol completely, not having veiling glare, it does not have dazzle, above-mentioned utilization rate is entirely effective rate of utilization。

The needs of demoulding during for ensureing that many toroidal lenss produce in a large number, many toroidal lenss of the present embodiment are also provided with technique curved surface。And the LED light source adopted is made up of LED chip and metal fin, described LED chip is arranged on metal diffusion sheet。

By adopting many toroidal lenss of the present utility model; make the LED desk lamp maintaining uniform illumination of design; completely eliminate dazzle; eye is dazzling without producing below desk lamp; human eye is made to be protected; the luminous utilization rate of light source can reach more than 90% simultaneously, and is all the place projecting and needing illumination, and the effective rate of utilization of light source luminescent is greatly improved。

Claims (4)

1. the many toroidal lenss for LED desk lamp, it is characterized in that: described many toroidal lenss are ellipsoid shape, and cross section is kidney-shaped, described many toroidal lenss include plane of refraction and light distribution curved surface, described plane of refraction is as a whole with light distribution curved surface combination, and plane of refraction is positioned at the back side of many toroidal lenss, light distribution curved surface is positioned at the front of many toroidal lenss, described plane of refraction is kidney-shaped plane, the middle part of described plane of refraction arranges the refraction hemisphere face caved inward, the hemispherical sphere center position of described refraction is used for installing LED light source, the end face that described light distribution curved surface combines with plane of refraction caves inward。

2. the many toroidal lenss for LED desk lamp according to claim 1, it is characterized in that, described many toroidal lenss are provided with installation limit, and described limit of installing is arranged at the periphery of plane of refraction, and described many toroidal lenss are fixed on the shell of LED desk lamp lamp body by installing limit。

3. the many toroidal lenss for LED desk lamp according to claim 1, it is characterised in that described many toroidal lenss adopt glass material。

4. the many toroidal lenss for LED desk lamp according to claim 1, it is characterised in that the lateral surface of described many toroidal lenss scribbles anti-reflection film。