CN101709833B

CN101709833B - LED light focusing and flooding lamp

Info

Publication number: CN101709833B
Application number: CN200910110786.1A
Authority: CN
Inventors: 周明杰; 刘廷明
Original assignee: Oceans King Lighting Science and Technology Co Ltd; Shenzhen Oceans King Lighting Engineering Co Ltd
Current assignee: Oceans King Lighting Science and Technology Co Ltd; Shenzhen Oceans King Lighting Engineering Co Ltd
Priority date: 2009-10-16
Filing date: 2009-10-16
Publication date: 2014-01-08
Anticipated expiration: 2029-10-16
Also published as: CN101709833A

Abstract

The invention provides an LED light focusing and flooding lamp which is suitable for the fixed or the movable illumination of the electric torch, the head lamp and the like. The LED light focusing and flooding lamp comprises a reflector (1) and an LED (2), wherein the LED (2) is arranged in the reflector (1), the front of the LED (2) is provided with a lens (3), and the lens (3) is arranged on an adjustable lens support (4) which can move along the main optical axis of the LED (2). When focusing the light, the LED light focusing and flooding lamp can ensure that the center of the light spot has high light intensity and high luminous flux utilization ratio, and when flooding the light, the LED light focusing and flooding lamp can ensure that no dark spot appears in the center of the light spot and the illumination of the light spot in the center is uniform.

Description

A kind of LED focus and flood lamp

Technical field

The present invention relates to a kind of LED light fixture, the LED light fixture that espespecially a kind of optically focused floodlight is adjustable.

Background technology

LED, as a kind of energy-saving and environmental protection light source, has been widely used in the spotlight lamps such as flashlight, head lamp.Simultaneously fixedly Flood lamps and lanterns and removable Flood lamps and lanterns also in constantly progress, but it is more rare to have the adjustable light fixture of two kinds of functions of optically focused and floodlight and spot size, only focus and flood lamp is fairly simple on the market at present, this light fixture installs paraboloid additional by LED and forms, thus the wherein adjustable switching realized between optically focused and floodlight in the position of reflector.As shown in Figure 1, this kind of focus and flood lamp operation principle be, LED light source is placed on the focus of paraboloid, thereby the light that LED light source sends parallel outgoing after this paraboloid emission realizes optically focused; LED light source can realize that away from the parabola focus it is floodlight that hot spot is dispersed along the central shaft of this paraboloid.

Though the mode that this focus and flood lamp makes LED light source move relative to reflector focal point can realize poly-floodlight switching illumination, but also exist following deficiency: at first, only have the light 13 parallel outgoing of ability of reflecting through reflector during optically focused and be utilized, the stronger light 14 in center is gone out to disperse and is difficult to be utilized due to direct projection, cause its central light strength lower, thereby effect is not quite desirable; Secondly, as shown in Figure 2, during floodlight, LED light source departs from the focus of paraboloid, can depart from reflector the place ahead the place, axis through light 15 and the light 16 of reflector reflection and converge, and forms bright ring, in be formed centrally blackening, hot spot is inhomogeneous, affects illuminating effect.

Summary of the invention

The uniform LED focus and flood lamp of hot spot during high, the floodlight of central light strength when the purpose of the embodiment of the present invention is to provide a kind of optically focused, the inhomogeneous problem of hot spot during low, the floodlight of central light strength while being intended to solve existing LED focus and flood lamp optically focused.

The embodiment of the present invention is achieved in that a kind of LED focus and flood lamp, comprising: reflector and the LED be located in reflector, and lens are established in the place ahead of described LED, and described lens are located at along the LED primary optical axis and are moved adjustable lens carrier; Described reflector (1) is paraboloid, and its equation is y ²=16X; Described lens (3) are convex lens, and wherein LED (2) is located on the focus of reflector (1); During optically focused, the focus of lens (3) overlaps with the focus of reflector (1); During floodlight, the spacing of LED (2) and lens (3) is less than the focal length of lens (3); Described lens carrier (4) comprises base (5) and support column (6), and an end of described support column (6) is fixedly connected with lens (3), and its other end is fixed on base (5); Described support column (6) is four.

During optically focused of the present invention, the spot center light intensity is high, utilance is also high.During floodlight, spot center not there will be blackening, and illumination uniformity is good.

The accompanying drawing explanation

Fig. 1 is the optically focused index path that prior art provides;

Fig. 2 is the floodlight index path that prior art provides;

Fig. 3 be the embodiment of the present invention provide LED focus and flood lamp optically focused the time structure chart;

Fig. 4 be the embodiment of the present invention provide LED focus and flood lamp floodlight the time structure chart;

Fig. 5 be the embodiment of the present invention provide LED focus and flood lamp optically focused the time index path;

Fig. 6 be the embodiment of the present invention provide LED focus and flood lamp optically focused the time index path.

The specific embodiment

In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.

As shown in Figure 3,4, LED focus and flood lamp of the present invention comprises a reflector 1 and the LED2 be located in reflector 1, and reflector 1 is paraboloid, and its equation is y ²=16X; Wherein LED2 is located on the focus of reflector 1.LED2 the place ahead be provided with lens 3, and lens 3 are located at one and move adjustable lens carrier 4 along the LED primary optical axis, lens carrier 4 comprises base 5 and some support columns 6, an end of support column 6 is fixedly connected with lens 3, its other end is fixed on base 5.In the present embodiment, lens 3 are convex lens, and support column 6 is four, the mobile switching that drives the poly-floodlight of convex lens 3 realization of scioptics support 4.

As shown in Figure 5, during optically focused, mobile lens support 4 makes LED2 be positioned at the focus of lens 3, and the focus of lens 3 overlaps with the focus of paraboloid 1.What LED2 dispersed at center originally is mapped to lens 3 than high light line 7, parallel outgoing after lens 3 are assembled, and this part is utilized than the high light line; Be collimated into parallel light emergence after the light 8 that the angle of divergence is larger is mapped to paraboloid 1, this part light also is utilized; Also have 9 direct projections of fraction light to go out, generally can't be utilized.The light overwhelming majority that LED2 sends so all is collimated outgoing, and spot center light intensity now is high, utilance is also high.

As shown in Figure 6, during floodlight, mobile lens support 4 makes the spacing d of LED and lens 3 be less than the focal length of lens 3, after most light 10 scioptics 3 outgoing that LED sends, evenly disperse, only a few light 11 (light energy seldom) parallel outgoing after paraboloid 1 is only arranged, but this part light does not affect the integral illumination effect of light fixture floodlight, now can continue mobile lens support 4 makes the EDGE CONTACT of lens 3 to reflector 1 inwall, also be movable to the lens contact in LED, perhaps change the convex lens of larger diameter curvature, the light of this parallel outgoing is eliminated, all can realize the floodlight effect that dispersion angle is different.Spot center now not there will be blackening, and illumination uniformity is good.

Than prior art, the mobile drive lens 3 of scioptics support 4 of the present invention realizes the switching of poly-floodlight.During optically focused, the focus of lens 3 overlaps with the focus of paraboloid 1, and the light overwhelming majority that LED2 sends all is collimated outgoing, and now the spot center light intensity is high, utilance is also high.During floodlight, the spacing of LED2 and lens 3 is less than the focal length of lens 3, after most rays pass through lens 3 outgoing that LED2 sends, evenly disperses, and now spot center not there will be blackening, and illumination uniformity is good.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims

1. a LED focus and flood lamp, comprise: reflector (1) and be located at the LED (2) in reflector, it is characterized in that, lens (3) are established in the place ahead of described LED (2), and described lens (3) are located at along the LED primary optical axis and are moved adjustable lens carrier (4); Described reflector (1) is paraboloid, and its equation is y ²=16x; Described lens (3) are convex lens, and wherein LED (2) is located on the focus of reflector (1); Described reflector (1) encloses a reflection cavity, and described lens (3) are contained in described reflection cavity, and described LED (2) and lens (3) spacing setting; During optically focused, the focus of lens (3) overlaps with the focus of reflector (1); During floodlight, the spacing of LED (2) and lens (3) is less than the focal length of lens (3); Described lens carrier (4) comprises base (5) and support column (6), and an end of described support column (6) is fixedly connected with lens (3), and its other end is fixed on base (5); Described support column (6) is four.