CN204100134U - A kind of LED lens and lens module - Google Patents

Abstract

The utility model discloses a kind of LED lens, comprises polarisation unit, reflector element, base; Described base is provided with LED light source installing hole, described polarisation unit to be positioned on base and to cover on described LED light source installing hole, described reflector element to be positioned on base and to be arranged on the side of polarisation unit, the peak of described reflector element vertical direction is higher than the peak of polarisation unit, reflector element horizontal direction maximum length is greater than the horizontal direction maximum length of polarisation unit, and reflector element horizontal direction is symmetrical relative to C90-270.Realizing LED light source realizes after secondary light-distribution through reflection from lens, and can make the directed homed on its target region of effective light-emitting line of 90%, radiation response is good, prior art of comparing, and can significantly improve illumination efficiency under identical power consumption.The utility model also provides a kind of lens module.

Description

A kind of LED lens and lens module

technical field

The utility model relates to the technical field of LED optical light distribution lighting, in particular to an LED lens and a lens module group thereof.

Background technique

LED is easy to achieve various forms of light distribution. A commonly used technical method is to design light distribution through secondary optical lenses, that is, to install independent lenses on the basis of well-made LED single lamps for light distribution design. The lens used is generally a polycarbonate (PC) lens, which is independent of the LED single lamp and is called a secondary lens. The secondary lens and the LED single lamp together form an optical system to obtain the target light distribution form.

The C-plane system is a commonly used coordinate system for measuring and describing the spatial light intensity distribution of light sources or lamps. This system can be used in photometric testing of LED light sources or lamps. The C-plane system is a set of planes whose intersection (polar axis) is a plumb line through the photometric center. The C-plane system is strictly positioned within the space and does not tilt with the luminaire. The first axis usually passes through the photometric center and is perpendicular to the face of the light exit. The second axis lies in the C=0O plane. Measure and describe the spatial light intensity distribution of LED light sources or lamps under the C-plane system. The light intensity distribution is generally described by the light distribution curve; The light intensity value corresponding to each angle on the light plane, and depict the curve of the light intensity value changing with the angle; people generally focus on and analyze the light distribution on the two light distribution planes of C0-C180 and C90-C270 Curve; from the light distribution curve diagram, the light distribution curves on the two planes can be coincident or completely different; we define the angle on the left side of the 0-degree angle line in the light distribution curve diagram as a positive angle (indicated by "+"), and the angle on the right side of the 0-degree angle line is a negative angle (indicated by "-"), then the light distribution curve on each plane can be symmetrical (relative to the 0-degree angle line about Symmetrical), it can also be asymmetrical (relative to the 0-degree angle line left and right asymmetry). The value of the beam angle can be read from the light distribution curve. We define the beam angle of the light distribution curve on a certain light distribution plane as: beam angle = the angle line of the maximum light intensity on the light distribution curve rotates counterclockwise to 50% of the maximum light intensity The angle value turned by the angle line + the angle value turned by when the maximum light intensity angle line rotates clockwise to 50% of the maximum light intensity angle line.

In the lighting of billboards, in order to realize the lighting of outdoor billboards in the past, traditional lighting usually adopts the installation method of two rows of upper and lower rows, which is very unfavorable for installation and subsequent maintenance. Or some use single row installation for the convenience of installation, that is, installation on the upper edge or lower edge, which makes the lighting effect of the billboard very poor. The more common phenomenon is that the middle of the billboard is too bright, and the surrounding area is very dark, or the whole area where the lamp is installed is bright, but the brightness of other areas is not enough, and there is a gradual change from bright to dark. It makes it difficult for customers to read and watch the content on the billboards, and the investment in advertising costs cannot achieve the desired publicity effect and other warning functions due to poor lighting effects.

Traditional billboards generally use floodlights to brighten billboards. The light distribution curve of this kind of lamp is generally a symmetrical light distribution curve, and the installation of the lamp is single-row installation, which makes the brightness of the billboard appear polarized when it is used, that is, the brightness of the area near the lamp is too high. The brightness of the area far away from the lamp is insufficient.

Therefore, in order to make the brightness of the billboard area using floodlights uniform, it is necessary to install lenses with different angles on different lamp modules, so that each module can illuminate different areas of the billboard, so as to improve the lighting effect uniformity. Disadvantages of this method: 1. When the brightness needs to be increased, it is necessary to increase the modules at different angles at the same time to maintain uniformity; 2. The angle between the light-emitting surface of each module and the billboard is different, which is difficult for installation engineers. Provided technical problems, it is necessary to repeatedly adjust the angle during installation; 3, because the angles of the LED lenses used are not the same, it is necessary to open multiple sets of LED lens molds, which increases the cost of the lamp.

To sum up, it is because the traditional light distribution of lamps does not have corresponding optical design for billboards, and the lighting effect of billboards has been poor due to poor control of secondary optics.

Contents of the invention

In order to solve the above-mentioned technical problems and aim at the shortcomings of similar products on the existing market, the utility model provides a new LED lens and lens module, which realizes the secondary light distribution of the LED light source through the reflection of the lens, and can make 90% effective The luminous light is directed to the target area, and the irradiation effect is good. Compared with the existing technology, the irradiation efficiency can be doubled under the same power consumption.

The utility model is realized by the following technical means:

An LED lens, comprising a polarizing unit, a reflection unit, and a base; the base is provided with an LED light source mounting hole, the polarizing unit is located on the base and covers the LED light source mounting hole, and the reflective The unit is located on the base and arranged on one side of the polarizing unit, the highest point of the reflection unit in the vertical direction is higher than the highest point of the polarization unit, the maximum length of the reflection unit in the horizontal direction is greater than the maximum length of the polarization unit in the horizontal direction, and the horizontal direction of the reflection unit is greater than that of the polarization unit. It is symmetrical about C90-270.

Wherein, the overall shape of the polarizing unit is hemispherical, including an outer surface and an inner surface, and the outer surface and the inner surface of the polarizing unit are free-form surfaces with asymmetrical and non-equal changes.

Wherein, the outer surface of the polarizing unit is approximately spherical, the inner surface of the polarizing unit is approximately drop-shaped with one end pointy and the other round, and the rounder end of the inner surface of the polarizing unit is close to the reflecting unit, and the inner surface and the outer surface form a Together, the center of the polarizing unit is thicker, the edge is thinner, and the thicker center is located at the C90 end.

Wherein, an inner cavity is formed between the inner surface of the polarizing unit and the base, and the section of the inner cavity in the horizontal direction is elliptical.

Wherein, the center of the inner surface of the polarizing unit and the center of the outer surface are on the same straight line perpendicular to the horizontal plane of the base. The center point of the outer surface, the center point of the outer surface of the reflection unit is the intersection point of the C90-270 section of the polarization unit and the outer surface of the reflection unit.

Wherein, an LED light source is placed in the inner cavity of the LED lens, and the light source is located at the center of the inner cavity of the lens.

Wherein, the reflective unit includes a reflective rear surface, the reflective rear surface is arc-shaped, and the concave surface of the arc faces the polarizing unit.

Finally, the polarizing unit, the reflecting unit and the base are integrally manufactured.

An LED lens module includes a plurality of LED lenses, and the plurality of LED lenses form an integrated structure.

The LED lens realized above and the LED lens module product composed of multiple LED lenses, through professional secondary light distribution, make the light distribution shape no longer simple symmetry, but the light ratio of left and right on the same reference plane About 1:9, that is, 90% of the light is deflected to the direction of the billboard, and the light in the other direction is almost none. In addition to ensuring the uniform lighting of the billboard, it improves the utilization rate of light and reduces the waste of light. At the same time, when the technology has different brightness requirements for different billboards, you can increase or decrease the modules at will to meet different brightness requirements. You only need to increase or decrease one by one, and there is no need to increase or decrease the modules exponentially. Light distribution The curve and uniformity are not affected by the number of lamp modules. The flexibility of installation and use of customers is guaranteed. The overall uniformity of the overall illuminated billboard can reach more than 0.8, and the uniformity of the key center can reach 0.87.

Description of drawings

Fig. 1 is a schematic diagram of LED lens structure;

Fig. 2 is a schematic diagram of LED lens C plane coordinates;

Figure 3 is a schematic cross-sectional view of the LED lens in the C0-180 direction;

Figure 4 is a cross-sectional view of the LED lens C90-270;

Figure 5 is a cross-sectional view of C0-180 after the combination of LED lens and LED light source;

Figure 6 is a cross-sectional view of C90-270 after the combination of LED lens and LED light source;

Fig. 7 is a schematic diagram of light reflection of the LED lens C0-180 section;

Fig. 8 is a schematic diagram of light reflection of the LED lens C90-270 section;

FIG. 9 is a schematic diagram of a lens module composed of multiple LED lenses.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

In this utility model, for the convenience of expression, the C plane is defined as a horizontal plane parallel to the base, and the surface that coincides with the C0-C180 light distribution plane in the LED lens structure is called the C0-C180 section, which is the same as the C90-C270 light distribution plane. The surface where the planes overlap is called the C90-C270 section, and the C0-C180 section and the C90-270 section are used as the cross-sectional plane of the LED lens structure.

The LED lens 1 shown in Figure 1 includes a polarizing unit 3, a reflection unit 2, and a base 4; the base 4 is provided with an LED light source mounting hole 5 (shown in Figure 4), and the polarizing unit 3 is located on the base 4 and covers the LED light source installation hole 5, and the reflection unit 2 is hemispherical, located on the base 4 and set on one side of the polarizing unit 3. In the vertical direction, that is, in the direction perpendicular to the horizontal plane where the base is located, the highest point of the reflective unit 2 is higher than the highest point of the polarizing unit 3, and in the horizontal direction where the base is located, the maximum length of the reflective unit 2 is greater than that of the polarizing unit 3, the reflection unit 2 is horizontally symmetrical with respect to C90-270.

Specifically, as shown in Figure 2, the coordinate diagram of the C plane of the LED lens, the C0-180 axis and the C90-270 axis are perpendicular to each other, and the two axes pass through the C0-180 section and the 90-270 plane respectively, and the midpoint where the two axes meet It is the light emitting center point of the LED light source.

The LED lens shown in Figure 3 and Figure 4 is in the cross-sectional view of C0-180 and C90-270, the polarizing unit contains an outer surface 7 and an inner surface 8, as shown in Figure 3, the outer surface 7 of the polarizing unit And the inner surface 8 is a free-form surface with asymmetric and non-equal changes. As shown in FIG. 4 , the outer surface 7 of the polarizing unit is approximately hemispherical, and the inner surface 8 is approximately drop-shaped with a pointed end and a round end. The rounder end of the inner surface 8 of the polarizing unit is close to the reflecting unit 2. The surface 8 and the outer surface 7 jointly form a shape in which the center of the polarizing unit is thicker, the edge is thinner, and the thicker center is located at the C90 end, and the thicker part is located away from the reflection unit 2 . As shown in FIG. 3 , an inner cavity 6 is formed between the inner surface 8 of the polarizing unit 3 and the base 4 . As shown in FIG. 2 , the horizontal section of the inner cavity is elliptical.

As shown in Figure 5, the center point C of the inner surface of the polarizing unit 3 and the center point B of the outer surface are on the same straight line, the straight line coincides with the light emitting center line of the LED light source 9 and is perpendicular to the horizontal plane of the base, and point O is The apex of the LED light source 9. And as shown in FIG. 6 , the horizontal plane where the central point B of the outer surface of the polarizing unit 3 passes through the central point A of the outer surface of the reflecting unit 2 , and the central point A of the outer surface of the reflecting unit 2 is the C90-270 section of the polarizing unit 3 and The intersection point of the outer surface of the reflection unit 2 . The reflective unit 2 includes a reflective rear surface 21 , as shown in FIG. 8 , the reflective rear surface is arc-shaped, and the concave surface of the arc faces the polarizing unit.

An LED light source is placed in the inner cavity of the LED lens, and the light source is located at the center of the inner cavity of the lens. When the LED light source 9 emits light, its light distribution is shown in Figure 7 and Figure 8. The initial state of the light emission is uniform divergence around the LED light source as the center. Refraction, the propagation direction of the light is changed as shown in Figure 7 and Figure 8, both the light wants to go to the thicker area of the polarizing unit, and the light emitted in the thinner area also changes the original propagation direction after being reflected by the lower surface of the reflection unit 2, Turn to the direction of the polarizing unit to transmit most of the light emitted by the LED light source toward the set direction. For the application on the advertising board, that is, most of the light is converted into effective light that illuminates the advertising area, which enhances the recognition of the advertisement and saves energy.

A plurality of LED lens units can be combined into a lens module as shown in FIG. 9 as required. The polarizing unit, reflection unit, and base are manufactured integrally, and the lens module is also manufactured integrally.

The schemes obtained by simply changing the utility model are also within the protection scope of the present invention, and are not listed here one by one.

Claims (9)

1. LED lens, comprise polarisation unit, reflector element, base; Described base is provided with LED light source installing hole, described polarisation unit to be positioned on base and to cover on described LED light source installing hole, described reflector element to be positioned on base and to be arranged on the side of polarisation unit, the peak of described reflector element vertical direction is higher than the peak of polarisation unit, reflector element horizontal direction maximum length is greater than the horizontal direction maximum length of polarisation unit, and reflector element horizontal direction is symmetrical relative to C90-270.

2. LED lens according to claim 1, is characterized in that: described polarisation whole unit is hemispherical, and containing outer surface and inner surface, the outer surface of described polarisation unit and inner surface are the free form surface of asymmetric non-equivalent change.

3. LED lens according to claim 2, it is characterized in that: described polarisation unit outer surface almost spherical, described polarisation unit inner surface is the approximate water-drop-shaped of a point circle, one end that described polarisation unit inner surface is comparatively justified is near reflector element, and described inner surface and outer surface are formed and jointly form that polarisation unit center is thicker, edge is thinner and the thicker C90 that is centrally located at holds.

4. the LED lens according to the arbitrary claim of Claims 2 or 3, is characterized in that: form inner chamber between the inner surface of described polarisation unit and base, and described inner chamber cross section is in the horizontal direction oval.

5. LED lens according to claim 1, it is characterized in that: described polarisation unit inner surface center and outer surface center are on the same straight line perpendicular to base horizontal plane, described straight line overlaps with the optical center line line that goes out of LED light source, and the horizontal plane at place, described polarisation unit outer surface center is through reflector element outer surface central point, described reflector element outer surface central point is the interface point of polarisation unit C90-270 cross section and reflector element outer surface.

6. LED lens according to claim 4, is characterized in that: place LED light source in the inner chamber of described LED lens, light source is positioned at the center of lens inner chamber.

7. LED lens according to claim 1, is characterized in that: described reflector element comprises reflective rear surface, described reflective rear surface is curved, and the concave surface facing polarisation unit of described arc.

8. LED lens according to claim 1, is characterized in that: described polarisation unit, reflector element, base are integrally manufactured.

9. a LED lens module, is characterized in that: comprise multiple LED lens, multiple described LED set of lenses integralization structure.