WO2015169175A1

WO2015169175A1 - Led light projection lamp

Info

Publication number: WO2015169175A1
Application number: PCT/CN2015/077957
Authority: WO
Inventors: 廖德明
Original assignee: 廖德明
Priority date: 2014-05-04
Filing date: 2015-04-30
Publication date: 2015-11-12
Also published as: CN203836755U

Abstract

An LED light projection lamp, which relates to the field of LED illumination and comprises a lamp board (1) and a convex lens (4), wherein the lamp board is installed at the tail end of the LED light projection lamp; the convex lens is installed in an opening at the front end of the LED light projection lamp; the geometric centre of the convex lens and the geometric centre of the lamp board are on the same line; the lamp board and the convex lens are parallel; and the lamp board is trapezoidal. The LED light projection lamp has the beneficial effects that by adding the convex lens at the front end of the LED light projection lamp, it can be achieved that the LED light projection lamp can refract LED light rays, through the cooperation of the trapezoidal lamp board, it is possible to accurately illuminate a rectangular area to be illuminated in the case where an angle is formed by the light projection lamp and the area to be illuminated.

Description

LED flood light

Technical field

The utility model relates to the field of LED illumination, in particular to an LED floodlight.

Background technique

LED floodlights commonly used on the market usually consist of five parts: light source, reflective surface, protective glass, electrical components, and housing. The light source used is a metal halide lamp, an LED integrated lamp board, and the like. The characteristic is that the projected light forms a fan-shaped illumination surface on the surface of the illuminated object, and the projected illumination area of the fan is inconsistent with the rectangular (or approximately rectangular) illumination object, resulting in more light waste and adjacent non- The light pollution in the lighting area causes the light energy to be wasted, and the corresponding power resources are also wasted.

Summary of the invention

The purpose of the present invention is to provide an LED flood light to solve the above problems.

The LED flood light provided by the utility model comprises a light board and a convex lens, the light board is installed at the end of the LED flood light, the convex lens is mounted on the opening of the front end of the LED flood light, and the geometry of the convex lens The center is on the same line as the geometric center of the light panel, the light panel is parallel to the convex lens, and the light panel is trapezoidal.

By mounting a convex lens at the front end of the LED floodlight, the light source emitted from the light panel is refracted, and the size of the trapezoid of the light panel is calculated by the refraction of the light. By controlling the shape of the trapezoid, it is possible to achieve precise illumination of the area irradiated by the rectangular strip when the LED floodlight is at an angle to the surface to be illuminated.

Further, the edge of the light board is an arc. The edge of the light board is designed as an arc, which can effectively compensate for the error caused by the edge of the LED flood light in actual production. In practical engineering applications, since the convex lens is often not an ideal convex lens, the projected light shadow will not be a straight line at the edge, but an inner curved or outer curved shape. At this time, based on the reversible principle of the optical path, the corresponding modification of the lamp panel will also be reversed.

Further, a distance between the light panel and the convex lens is smaller than a focal length of the convex lens. The distance from the light panel to the convex lens is smaller than the focal length of the convex lens. The distance from the light board to the convex lens is smaller than the focal length of the convex lens. According to the principle of convex lens imaging, if the distance between the convex lens and the light board is u, so that the projected light and shadow form a clear image on the surface of the illuminated area, the projected light and shadow will appear. The image of each LED chip itself on the lamp board. At this time, u should be adjusted to u' such that u' < u, and the image depths of the respective LED chips themselves on the thrown lamp plate are defocused and diffused to fuse with each other. According to the imaging principle, the blurred image is blurred, and the illumination precision of the single LED is blurred, so that the image of the illumination area is more uniform and the overall illumination effect is better.

Further, the convex lens is a Fresnel convex lens. The use of Fresnel convex lens not only has good refraction effect, but also has a thin thickness, which is favorable for ensuring sufficient light transmittance even when the same refractive index is achieved, and does not reduce the illumination effect of the light.

Further, the LEDs on the lamp panel are arranged in an equal difference from top to bottom. The LEDs of the equidistant arrangement are distributed according to the attenuation of the light on the surface to be illuminated, so that the illumination value of the LED can be more evenly distributed on the surface to be illuminated.

The utility model provides the beneficial effects that by adding a convex lens at the front end of the LED floodlight, the LED floodlight can be refracted by the LED light, and the trapezoidal light panel can be used. In the case where the spotlight is now at an angle to the area to be illuminated, the rectangular area to be illuminated is precisely illuminated.

DRAWINGS

1 is a schematic view of an LED flood light provided by a first embodiment of the present invention;

2 is a schematic diagram of a lamp panel of an LED floodlight according to a first embodiment of the present invention;

3 is a schematic diagram of a light panel of an LED floodlight according to a second embodiment of the present invention;

4 is a schematic view of a Fresnel lens of an LED floodlight according to a fourth embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to specific embodiments and drawings.

1-2 is a LED floodlight according to a first embodiment of the present invention, comprising a light board 1 and a convex lens 4, the light board 1 is installed at the end of the LED flood light, and the convex lens 4 is installed at an opening of the front end of the LED flood light. The geometric center of the convex lens 4 is on the same line as the geometric center of the lamp panel 1, the lamp panel 1 and the convex lens 4 are parallel, and the lamp panel 1 has a trapezoidal shape.

The glass cover of the prior art LED floodlight is replaced by a convex lens 4, and the light emitted from the light plate 1 is refracted by the convex lens 4. The light plate is used to calculate the light plate 1 by combining the focal length of the convex lens 4. The size of the trapezoid. By controlling the shape of the trapezoid, it is possible to achieve precise illumination of the area irradiated by the rectangular strip when the LED floodlight is at an angle to the surface to be illuminated.

3 is an LED floodlight according to a second embodiment of the present invention, comprising a light board 1 and a convex lens 4, the light board 1 is mounted at the end of the LED flood light, and the convex lens 4 is mounted at the front end of the LED flood light, the convex lens 4 The geometric center is on the same line as the geometric center of the light board 1, the light board 1 and the convex lens 4 are parallel, the light board 1 is trapezoidal, and the edge of the light board 1 is an arc.

The edge of the lamp panel 1 is designed as an arc, which can effectively compensate for the error caused by the edge of the LED floodlight in actual production. In practical engineering applications, since the convex lens 4 is often not the ideal convex lens 4, the projected light shadow will not be a straight line at the edge, but an inner arc or an outer arc distortion. At this time, based on the reversible principle of the optical path, the corresponding modification of the lamp panel 1 will also be performed. It is possible to make the edges of the illuminated pattern more straight. Conducive to the formation of rectangular boundaries to achieve more precise rectangular illumination.

The LED flood light provided by the third embodiment of the present invention comprises a light board 1 and a convex lens 4. The light board 1 is installed at the end of the LED flood light, and the convex lens 4 is installed at the opening of the front end of the LED flood light, and the geometric center of the convex lens 4 On the same line as the geometric center of the lamp panel 1, the lamp panel 1 and the convex lens 4 are parallel, and the lamp panel 1 has a trapezoidal shape. The distance from the lamp panel 1 to the convex lens 4 is smaller than the focal length of the convex lens 4.

The distance from the light board 1 to the convex lens 4 is smaller than the focal length of the convex lens 4. According to the imaging principle of the convex lens 4, if the distance between the convex lens 4 and the light board 1 is u, so that the projected light shadow forms a clear image on the surface of the illuminated area, then The projected light and shadow will appear as an image of each LED 3 itself on the light panel 1. At this time, u should be adjusted to u' such that u' < u, and the image depth of each of the LEDs 3 on the projected lamp panel 1 is defocused and spread to fuse with each other. According to the imaging principle, a blurred inverted image is formed, and a single LED 3 is blurred, and the overall illumination effect is better.

The LED flood light provided by the fourth embodiment of the present invention includes a light board 1 and a convex lens 4, the light board 1 is installed at the end of the LED flood light, and the convex lens 4 is installed at the opening of the front end of the LED flood light. The geometric center of the convex lens 4 is on the same line as the geometric center of the lamp panel 1, the lamp panel 1 and the convex lens 4 are parallel, and the lamp panel 1 has a trapezoidal shape. The edge of the light board 1 is an arc. The distance from the lamp panel 1 to the convex lens 4 is smaller than the focal length of the convex lens 4.

By attaching the convex lens 4 to the front end of the LED floodlight, the light source emitted from the lamp panel 1 is refracted, and the size of the trapezoidal shape of the lamp panel 1 is calculated by the refraction of the light. By controlling the shape of the trapezoid, it is possible to achieve precise illumination of the area irradiated by the rectangular strip when the LED floodlight is at an angle to the surface to be illuminated.

The edge of the lamp panel 1 is designed as an arc, which can effectively compensate for the error caused by the edge of the LED floodlight in actual production. In practical engineering applications, since the convex lens 4 is often not the ideal convex lens 4, the projected light shadow will not be a straight line at the edge, but an inner curved shape or an outer curved shape. At this time, based on the reversible principle of the optical path, the corresponding modification of the lamp panel 1 will also be performed. The distance between the lamp panel 1 and the convex lens 4 is smaller than the focal length of the convex lens 4. The distance from the lamp panel 1 to the convex lens 4 is smaller than the focal length of the convex lens 4. According to the imaging principle of the convex lens 4, if the distance between the convex lens 4 and the light board 1 is u, so that the projected light shadow forms a clear image just on the surface of the illuminated area, the projected light shadow will appear on each of the LEDs 3 on the light board 1. image. At this time, u should be adjusted to u' such that u' < u, and the image depth of each of the LEDs 3 on the projected lamp panel 1 is defocused and spread to fuse with each other. According to the imaging principle, a blurred inverted image is formed, and a single LED 3 is blurred, and the overall illumination effect is better.

Meanwhile, in the present invention, the convex lens 4 is a Fresnel convex lens as shown in FIG. The Fresnel convex lens not only has good refraction effect, but also has a thin thickness, which is favorable for ensuring sufficient light transmittance even when the same refractive index is achieved, and does not reduce the illumination effect of the light.

The LEDs 3 on the lamp panel 1 are arranged in an equal difference from top to bottom. The LEDs of the equal-distribution arrangement can make the brightness value of the light more evenly distributed on the surface to be illuminated.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, various modifications and changes can be made in the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

An LED floodlight, comprising: a light panel mounted on an end of the LED floodlight, and a convex lens mounted on an opening of a front end of the LED floodlight, the convex lens The geometric center is on the same line as the geometric center of the light panel, the light panel being parallel to the convex lens, the light panel being trapezoidal.
The LED flood light of claim 1 wherein the edge of the light panel is an arc.
The LED floodlight of claim 1 wherein the distance between the light panel and the convex lens is less than the focal length of the convex lens.
The LED flood light of claim 1 wherein said convex lens is a Fresnel convex lens.
The LED floodlight of claim 1 wherein the LEDs on said panel are equally spaced from top to bottom.