KR20130110967A

KR20130110967A - Floodlighting lens

Info

Publication number: KR20130110967A
Application number: KR1020120033355A
Authority: KR
Inventors: 석대일; 이창섭; 이창모
Original assignee: 삼성전자주식회사
Priority date: 2012-03-30
Filing date: 2012-03-30
Publication date: 2013-10-10

Abstract

PURPOSE: A floodlighting lens is provided to distribute a beam pattern by asymmetrically forming at least one of an input part and an output part. CONSTITUTION: Light from a light emitting device passes through a lens body (110). The lens body is arranged on the front surface of the light emitting device. An input part inputs the light from the light emitting device. An output part (130) is formed on the front surface of the lens body. At least one of the input part and the output part is asymmetrically formed.

Description

Floodlight {FLOODLIGHTING LENS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light transmitting lens used for a floodlight, and more particularly, to a light transmitting lens capable of condensing and distributing a light emitting device of a light emitting device in an asymmetrical shape.

Light Emitting Diode (LED) is a semiconductor device that emits light when current flows, and is a PN junction diode made of gallium arsenide (GaAs) and gallium nitride (GaN) optical semiconductors, and converts electrical energy into light energy. It is an electronic component.

Recently, blue LEDs and ultraviolet LEDs implemented using nitrides having excellent physical and chemical properties have emerged. Also, blue or ultraviolet LEDs and fluorescent materials can be used to produce white light or other monochromatic light, thereby expanding the application range of light emitting devices. have.

The light emitting device has advantages such as long lifetime, miniaturization and light weight, strong directivity of light and low voltage driving, and is resistant to shock and vibration, and does not require preheating time and complicated driving. It is possible. For example, the application range of LEDs has recently been expanded from small lights of mobile terminals to general lighting in indoors and outdoors, automobile lights, and backlights for large LCDs.

In particular, floodlights are the most commonly used lighting fixtures for industrial and landscape lighting. Conventionally, floodlight fixtures using HID lamps and reflector lamps have been used, but recently, as the performance of light emitting devices improves, development of LED floodlight fixtures employing light emitting devices has been actively conducted.

In general, the light distribution type of the conventional flood light fixtures and LED flood light fixtures implement symmetrical light distribution. This symmetrical light distribution can be achieved simply by designing a parabolic reflector or by using a hemispherical or conical lens. Therefore, there is an advantage that it is easy to design and also easy to manufacture.

According to the NEMA classification, floodlight fixtures are classified according to beam angle, but are usually classified according to beam angle of symmetrical light distribution. That is, the LED floodlight fixtures are used for various beam angles according to the purpose and place of use, and to control the light distribution by using a reflector or a secondary optical lens to implement light distribution having various beam angles. Usually, symmetrical light distribution is used a lot, and when looking at the beam pattern formed on the irradiation surface, a circular beam pattern is formed. On the other hand, the light distribution focused in an asymmetrical shape is not mentioned separately.

However, depending on the lighting environment, a light distribution type focused on an asymmetrical shape may implement a better lighting effect than a light distribution type focused on a symmetrical shape. For example, when projecting a wall surface of a building or illuminating a rectangular floor surface rather than a square floor surface, light distribution focused in an asymmetrical form may be advantageous. In addition, asymmetric light distribution can achieve a good uniformity even when illuminating signboards and sculptures.

Embodiments of the present invention provide a light transmitting lens capable of condensing light rays of a light emitting device in an asymmetrical shape to distribute light in an asymmetrical beam pattern.

In addition, an embodiment of the present invention provides a light transmitting lens capable of condensing light rays of a light emitting device in an asymmetrical shape using only a refraction method without using a total reflection method.

In addition, an embodiment of the present invention, it is possible to easily implement asymmetrical light distribution by simply changing the structure of the light-transmitting lens, and provides a light-transmitting lens that can easily manufacture the light-transmitting lens.

Embodiments of the present invention relate to a light transmitting lens that distributes light emitted from a light emitting device.

According to an embodiment of the present invention, the lens body disposed in front of the light emitting device and the light beam of the light emitting device passes, the incident formed on the rear portion of the lens body facing the light emitting device so that the light beam of the light emitting device is incident And a light emitting part including a light emitting part formed at a front portion of the lens body so that light incident on the incident part is emitted toward the front of the lens body. Here, at least one of the incident part or the exit part may be formed in an asymmetrical shape to condense and distribute light rays of the light emitting device in an asymmetrical shape. In addition, the edge portion of the emission part may be formed in a straight cross-sectional shape in which the light beam of the light emitting device may come out at the maximum luminous intensity.

Therefore, the present embodiment can easily implement asymmetrical light condensing by a simple method of forming the incidence portion or the emission portion in an asymmetrical shape. In addition, since the edge portion of the exit portion according to the present embodiment is formed in a straight cross-sectional shape, it is possible to simply manufacture the mold of the light-transmitting lens, it is possible to simply separate the mold from the light-transmitting lens in the manufacture of the light-transmitting lens.

According to one embodiment, at least one of the incident part or the exit part may be formed to have different cross-sectional shapes on optical axis planes including the optical axis of the lens body. At least one of the incident part and the exit part may be formed in an elliptical dome structure around the optical axis.

According to one embodiment, the output unit, the first output unit formed in the center of the front portion of the lens body and formed of an elliptical dome structure around the optical axis of the lens body, and to surround the outer periphery of the first output unit The light emitting device may include a second emission part having a light emitting part having a linear cross-sectional shape so that the light beam of the light emitting device may come out at the maximum luminous intensity.

The second output unit may include a straight exit surface formed in the shape of an outer circumferential surface of one of cones or cylinders having an optical axis of the lens body as a central axis, and an inclined exit surface formed to be inclined between the straight exit surface and the first exit unit. It can be provided.

Here, the angle between the linear emission surface and the optical axis may be set so that the light rays of the light emitting device can come out at the maximum luminous intensity. That is, the linear emission surface may be formed to be parallel to the optical axis, or may be formed to be substantially parallel to the optical axis. When the straight exit surface is formed as described above, the mold structure of the light transmitting lens may be simply formed, and the mold may be simply separated from the light transmitting lens when the light transmitting lens is manufactured.

The inclined exit surface may be inclined in the same direction as the traveling direction of the light beam passing through the lens body. Therefore, the light rays passing through the lens body are not emitted to the outside through the inclined emission surface. That is, the light beam of the light emitting device is incident through the incident part and then exits through the first emission part and the straight exit surface.

The incident part and the exit part may be formed to focus the light of the light emitting device only by a refractive method. That is, since the light transmitting lens according to the present exemplary embodiment has a structure in which the light beams of the light emitting device collect only the refractive method instead of the total reflection method, the light loss can be reduced than the light transmitting lens using the total reflection method.

According to another embodiment of the invention, the lens body disposed in front of the light emitting device and the light beam of the light emitting device passes, the incident formed on the rear portion of the lens body facing the light emitting device so that the light beam of the light emitting device is incident And a light emitting part including a light emitting part formed at a front portion of the lens body so that light incident on the incident part is emitted toward the front of the lens body. Here, at least one of the incident part or the exit part may be formed in an asymmetrical shape to condense and distribute light rays of the light emitting device in an asymmetrical shape. The incidence part and the emission part may be formed to focus the light of the light emitting device only by a refractive method.

At least one of the incident part or the exit part may be formed to have different cross-sectional shapes on optical axis planes including the optical axis of the lens body. At least one of the incident part and the exit part may be formed in an elliptical dome structure around the optical axis.

The transmissive lens according to the exemplary embodiment of the present invention may condense the light rays of the light emitting device in an asymmetric shape and then distribute the light in a non-symmetrical beam pattern. Therefore, the present embodiment may be very advantageous due to the asymmetrical condensing light distribution when illuminating an exterior and a sign of a building or a sculpture, or illuminating a rectangular bottom surface instead of a square bottom.

In addition, the transmissive lens according to an embodiment of the present invention may implement asymmetric beam pattern light distribution by only a simple structural change to change the shape of at least one of the incidence part or the exit part to an asymmetric shape. Therefore, in the present embodiment, by appropriately changing the shape of the incidence portion or the emission portion, it is possible to smoothly change the asymmetrical beam pattern in accordance with the lighting environment and design conditions.

In addition, the light transmitting lens according to the embodiment of the present invention focuses the light of the light emitting device in an asymmetrical shape by using only a refraction method instead of the total reflection method at the incidence part and the exit part, thereby preventing light loss due to total reflection. Can thereby improve the performance of the floodlight lens.

In addition, the light transmitting lens according to the embodiment of the present invention, since the edge of the exit portion is formed in a straight cross-sectional shape, it is possible to simplify the structure of the mold used for the production of the light-transmitting lens, the light from the mold during the production of the light-transmitting lens The lens can be easily removed.

1 is a perspective view showing a light transmitting lens according to an embodiment of the present invention.
FIG. 2 is a front view illustrating the floodlight lens shown in FIG. 1.
3 is a cross-sectional view illustrating an installation state of a light transmitting lens along a first optical axis plane illustrated in FIG. 2.
4 is a reference diagram for describing a cross-sectional shape of the light transmitting lens of FIG. 3.
5 is a cross-sectional view illustrating an installation state of a light transmissive lens along a second optical axis plane illustrated in FIG. 2.
FIG. 6 is a reference diagram for describing a cross-sectional shape of the light transmissive lens illustrated in FIG. 5.
7 is a perspective view showing another example of a light transmitting lens according to an embodiment of the present invention.
8 and 9 are reference views showing the path of the light beams according to the shape of the inclined exit surface of the light transmitting lens according to an embodiment of the present invention.
10 is a view showing a light distribution simulation result of a light transmitting lens according to an embodiment of the present invention.
FIG. 11 is a view illustrating an illuminance curve of the floodlight lens according to the exemplary embodiment of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. Like reference symbols in the drawings denote like elements.

1 is a perspective view showing a light transmitting lens 100 according to an embodiment of the present invention, Figure 2 is a front view showing a light transmitting lens 100 shown in FIG. 3 is a cross-sectional view illustrating an installation state of the light transmitting lens 100 along the first optical axis plane AA illustrated in FIG. 2, and FIG. 4 illustrates a cross-sectional shape of the light transmitting lens 100 illustrated in FIG. 3. See also for reference. In addition, FIG. 5 is a cross-sectional view illustrating an installation state of the transmissive lens 100 along the second optical axis plane BB illustrated in FIG. 2, and FIG. 6 illustrates a cross-sectional shape of the translucent lens 100 illustrated in FIG. 5. See also for reference.

1 to 6, the light transmitting lens 100 according to the exemplary embodiment of the present invention collects light rays L1, L2, and L3 of the light emitting device 102 in an asymmetrical shape and distributes the light in an asymmetrical beam pattern. It is an optical member. For example, the light transmitting lens 100 includes a lens body 110, an incident part 120, and an exit part 130.

1 to 6, the lens body 110 may be disposed in front of the light emitting device 102, and may be formed of a transparent material such that light rays L1, L2, and L3 emitted from the light emitting device 102 pass through the lens body 110. Can be formed. The main body 110 as described above may be formed in a dome shape to cover the light emitting device 102. On the other hand, in the present embodiment will be described by setting the direction in which the light beam (L1, L2, L3) is emitted from the light emitting device 102 to the front for convenience of description.

The mounting portion 112 for installing the lens body 110 may be formed at an edge portion of the lens body 110. The mounting part 112 may be formed to protrude in a flange structure along the edge portion of the lens body 110. For example, the mounting portion 112 is mounted on the installation place of the lens body 110 using a fixing member such as an adhesive or a fastening member, or is fitted to an assembly groove formed at the installation place of the lens body 110. It can be mounted as.

On the other hand, the light emitting device 102 is a light source used for illumination, it will be described below that the LED package is used as the light emitting device (102). However, the present invention is not limited thereto, and various kinds of light sources may be used according to design conditions and lighting environments.

1 to 6, the incidence part 120 is a member for injecting light rays L1, L2, and L3 emitted from the light emitting device 102 into the lens body 110. It may be formed on the rear portion of the lens body 110 facing the. The emission unit 130 is a member that emits light rays L1, L2, and L3 passing through the lens body 110 to the outside, and may be formed on the front portion of the lens body 110.

As shown in FIG. 3 or FIG. 5, the incident part 120 and the exit part 130 may be formed to condense the light beams L1, L2, and L3 of the light emitting device 102 only by a refractive method. That is, the light rays L1, L2, and L3 of the light emitting device 102 may be incident into the lens body 110 while being refracted by the incidence part 120, and the light rays L1, which pass through the lens body 110, may be incident. L2 and L3 may be emitted toward the front of the translucent lens 100 while being refracted by the exit unit 130. Therefore, the light transmitting lens 100 according to the present exemplary embodiment may collect the light rays of the light emitting device 102 in a refractive manner rather than in total reflection. Since the optical loss of the refraction method is generally smaller than the total reflection method, the light transmitting lens 100 according to the present embodiment may improve the light condensing performance and the light distribution performance than the lens employing the total reflection method.

1 to 6, at least one of the incident part 120 or the exit part 130 may be formed in an asymmetrical shape so as to condense the light beams L1, L2, L3 of the light emitting device 102 in an asymmetrical shape. have. As such, when at least one of the incident part 120 or the exit part 130 is formed in an asymmetrical shape, the incident part 120 or the exit part 130 emits light rays L1, L2, and L3 of the light emitting device 102. The light may be refracted in an asymmetrical shape to condense, and the beam pattern emitted from the light transmitting lens 100 may be formed in an asymmetrical shape.

In detail, the conventional transmissive lens has an incidence part and an outgoing part formed in a symmetrical shape with respect to the optical axis of the lens, but the conventional incidence part and the outgoing part have a spherical shape around the optical axis. However, the light transmitting lens 100 of the present exemplary embodiment may form at least one of the incident part 120 or the exit part 130 in an asymmetrical shape to distribute the beam pattern in an asymmetrical shape. For example, at least one of the incident part 120 or the exit part 130 may be formed to have different cross-sectional shapes on the optical axis planes AA and BB including the optical axis CC of the lens body 110. have. Here, the optical axis planes A-A and B-B mean virtual planes that include the entire optical axis C-C of the lens body 110. The optical axis planes A-A and B-B may be provided in plural in accordance with an angle rotated about the optical axis C-C of the lens body 110.

3 and 5, the cross-sections of the incidence portion 120 and the emission portion 130 of the light transmitting lens 100 according to the present embodiment are shown on two optical axis planes A-A and B-B orthogonal to each other. 3 illustrates a cross section along the first optical axis plane AA of the two optical axis planes AA and BB, and FIG. 5 illustrates the second optical axis plane BB of the two optical axis planes AA and BB. A cross section is shown. That is, any one of the incident part 120 or the exit part 130 may be formed in different cross-sectional shapes on the two optical axis planes AA, BB, thereby the incident part 120 or the exit part 130. Any one may be formed in an asymmetrical shape.

Hereinafter, in the present embodiment, for convenience of description, only the exit part 130 of the entrance part 120 or the exit part 130 is described as being formed in an asymmetric shape, but only the entrance part 120 is formed in an asymmetric shape or is incident Both the part 120 and the exit part 130 may be formed in an asymmetrical shape. In addition, in the present exemplary embodiment, the emitter 130 is described as having an elliptic dome structure around the optical axis CC of the lens body 110, but is not limited thereto. It can be formed as.

Accordingly, the incident part 120 may be formed convexly toward the front of the lens body 110 in a hemispherical shape, and the exit portion 130 may be formed in the front of the lens body 110 in the shape of an ellipse dome. It may be formed convex toward. The exit unit 130 may be formed in an ellipse shape having a long radius 132a and a short radius 132b, and the size of the long radius 132a and the short radius 132b may be appropriately adjusted according to the lighting environment and design conditions. .

When the curvature of the at least one of the incident part 120 or the exit part 130 as described above, the size or shape of the long radius 132a and the short radius 132b is changed, the light distribution of the light transmitting lens 100 is distributed in an asymmetric shape. Performance can be adjusted accordingly to the lighting environment and design conditions.

1 to 6, at least a portion of the edge portion of the emission unit 130 may be formed in a straight cross-sectional shape so that the light beam of the light emitting device 102 may come out at the maximum luminous intensity. Meanwhile, an edge portion of the exit unit 130 may form a side surface of the light transmitting lens 100. Therefore, the side surface of the light transmitting lens 100 may be formed in a straight cross-sectional shape along the front and rear directions.

As described above, when the side surface of the light transmitting lens 100 is formed in a straight shape, it may have various advantages than when the side surface of the light transmitting lens 100 is formed in a curved shape. For example, since the structure of the light transmitting lens 100 is simplified, a mold used in manufacturing the light transmitting lens 100 can be manufactured more simply, and the side surface of the light transmitting lens 100 is formed long in the front-rear direction. The light transmitting lens 100 and the mold can be easily separated.

That is, when the edge portion of the exit portion 130 is formed in a curved cross-sectional shape, it is very difficult to accurately form a mold with a set curvature of the curved cross section, and the light transmitting lens 100 having the side of the curved cross section is separated from the curved mold. It is also very difficult to do. In addition, when the side surface of the light-transmitting lens 100 is formed in a curved cross-sectional shape with a predetermined curvature, the light reflection is likely to occur at the curved portion, and thus the light loss is likely to occur.

3 to 6, the emission unit 130 according to the present embodiment may include a first emission unit 132 and a second emission unit 134.

Here, the first emission unit 132 is an emission unit formed in the center of the front portion of the lens body 110. The first emission unit 132 may have an elliptic dome structure around the optical axis C-C of the lens body 110.

In addition, the second emission unit 134 may be formed to surround the outer circumference of the first emission unit 132. The second emission unit 134 may have a light emitting portion L3 having a straight cross-sectional shape so that the light beam L3 passing through the lens body 110 may come out at the maximum luminous intensity.

Accordingly, the first output unit 132 may collect light rays L1 and L2 passing through the center portion of the lens body 110, and the second output unit 134 may pass through the outer portion of the lens body 110. The light beam L3 can be focused.

On the other hand, a portion of the second emission unit 134 may be formed in a straight section at an angle for emitting the light L3 at the maximum luminous intensity. For example, the second emission unit 134 may include a straight exit surface 136 and an inclined exit surface 138.

The straight exit surface 136 may be formed in a shape similar to the outer circumferential surface of any one of a cone or a cylinder having a central axis of the optical axis C-C of the lens body 110. Meanwhile, the angle θ3 formed between the linear emission surface 136 and the optical axis C-C may be set so that the light ray L3 of the light emitting device 102 may come out at the maximum luminous intensity. For example, the linear emission surface 136 may be formed in parallel with the optical axis C-C, or may be formed within a range in which the angle θ3 between the optical axis C-C has an acute angle.

The inclined exit surface 138 may be formed to be inclined between the straight exit surface 136 and the first exit portion 132. The inclined exit surface 138 may be inclined in the same direction as the traveling direction of the light beam L3 passing through the lens body 110. Therefore, the light beam L3 passing through the lens body 110 may not be emitted through the inclined emission surface 138 and may be emitted only to the straight emission surface 136. That is, the light rays L1, L2, and L3 of the light emitting device 102 are incident into the lens body 110 through the incident part 120, and then the first emission part 132 and the straight exit surface 136 are formed. Can be emitted outside.

4 and 6 are reference diagrams for explaining the shape of the light transmitting lens 100 according to the present embodiment. Hereinafter, the shape of the light transmitting lens 100 will be described in more detail with reference to FIGS. 4 and 6.

4 and 6, the incident part 120 may be formed in a surface shape of a sphere. The incident part 120 may be formed at an appropriate curvature such that the light rays L1, L2, and L3 emitted from the light emitting device 102 are refracted at an angle that can be refracted in the lens body 110.

The radius of curvature R1 of the incident part 120 may be set to the same value in all parts of the incident part 120. Accordingly, the incident part 120 may be formed in the same shape in all optical axis planes formed around the optical axis CC, and curvature in all angles θ1 formed between the optical axis CC and the optical axis CC within one optical axis plane. Radius R1 may be formed equally. Preferably, the radius of curvature R1 of the incident portion 120 may be set to a value between 5-15mm. The radius of curvature R1 of the incident part 120 may be changed by the radiation pattern of the light emitting device 102, the beam angle to be implemented, and the size of the light transmitting lens 100.

The width W1 of the incidence part 120 may also be identically formed in all optical axis planes, and the height H1 of the incidence part 120 may be identically formed in all optical axis planes. Preferably, the width W1 of the incident part 120 may be set to a value between 3 and 12 mm, and the height H1 of the incident part 120 may be set to 1 to 5 mm.

4 and 6, the first emission unit 132 of the emission unit 130 may have different shapes and dimensions in the first optical axis plane A-A and the second optical axis plane B-B.

The center of the first emission unit 132 is a portion through which the optical axis C-C passes, and the radius of curvature R2 may be set to 0 mm or close to 0 mm. Preferably, the center of the first exit portion 132 is preferably formed to the curvature radius (R2, R4) to 0mm, it may be designed to various values close to 0mm depending on the design conditions and circumstances of the light-transmitting lens 100. have. For example, in the first optical axis plane AA, the radius of curvature R2 of the center of the first emission unit 132 is 0 mm, but in the second optical axis plane BB, the curvature of the center of the first emission unit 132 is central. The radius R4 may be set to a value between 0 and 8 mm.

The edge portion of the first emission unit 132 is a portion in contact with the second emission unit 134 and has different curvature radii R3 and R5 in the first optical axis plane AA and the second optical axis plane BB. Can be. This is because the radius of curvature R3 of the edge portion of the first emission part 132 varies according to the directions of the optical axis planes A-A and B-B because the first emission part 132 is formed in an elliptical shape. Preferably, the radius of curvature R3 of the edge portion of the first output unit 132 may be set to 5 to 15mm, the radius of curvature R5 in the first optical axis plane AA is the second optical axis plane BB. It may be formed larger than the radius of curvature (R1).

The radius of curvature at any position of the first output unit 132 as described above may be set to an intermediate value between the radius of curvature R2 and R4 of the center portion and the radius of curvature R3 and R5 of the edge portion. It may be formed continuously along the exit portion 132.

4 and 6, the second emission unit 134 of the emission unit 130 may have the same shape and dimensions in the first optical axis plane A-A and the second optical axis plane B-B.

Here, the linear emission surface 136 of the second emission unit 134 is disposed in parallel with the optical axis CC, or inclined at a predetermined angle toward the optical axis CC based on a line segment parallel to the optical axis CC. It can be formed as. Preferably, the inclination angle θ3 of the straight exit surface 136 may be set to 0 to 10 degrees.

When the inclination of the linear emission surface 136 as described above is increased, the advancing direction of the light rays L1, L2, L3 refracted by the linear emission surface 136 may be changed in a direction closer to the optical axis CC. have. Thus, the range of light distribution by the light transmitting lens 100 can be reduced.

The inclined emission surface 138 of the second emission unit 134 may be formed between the first emission unit 132 and the linear emission surface 136 to be parallel to the light beam L3 emitted from the light emitting device 102. Can be. That is, the inclination angle of the inclined exit surface 138 may be determined according to the traveling direction of the light beam L3 passing through the lens body 110. The advancing direction of the light beam L3 may be changed in various ways depending on the material of the lens body 110, the incident angle at the incident part 120, the critical angle and the refraction angle of the light beam L3, and the like. .

Preferably, the inclined exit surface 138 and the optical axis CC may be set at an angle between 50 and 70 degrees. On the other hand, when the angle between the inclined exit surface 138 and the optical axis CC is formed too large, the light beam L3 may be totally reflected at the inclined exit surface 138, and the angle between the inclined exit surface 138 and the optical axis CC If is formed to be too small may be formed a portion of the inclined exit surface 138 where the light does not reach.

7 is a perspective view showing another example of a light transmitting lens 200 according to an embodiment of the present invention. In Fig. 7, the same reference numerals as those shown in Figs. 1 to 6 denote the same members. Hereinafter, descriptions will be made mainly on points different from the light transmitting apparatus 100 illustrated in FIGS. 1 to 6.

Referring to FIG. 7, the light transmitting lens 200 according to another exemplary embodiment of the present invention differs from the light transmitting lens 100 shown in FIG. 1 by having a relatively large angle θ3 ′ between the optical lens CC and the optical axis CC. The difference is that a straight exit surface 236 having a) is formed.

That is, although the linear emission surface 136 of the translucent lens 100 illustrated in FIGS. 1 to 6 is formed to be substantially parallel to the optical axis CC, in the present embodiment, the linear emission surface 236 of the transmissive lens 100 is formed. It may be formed in a structure that is inclined greatly in the direction close to the optical axis (CC). For example, in FIGS. 1 to 6, an angle between the optical axis CC and the linear emission surface 136 may be formed at 1.1 degrees, and an angle between the optical axis CC and the linear emission surface 236 is shown in FIG. 7. May be formed at 50.9 degrees.

Therefore, the linear emission surface 236 of the emission unit 230 illustrated in FIG. 7 is formed at the angle of the lens body (3 ′) larger than the angle θ3 of the linear emission surface 136 illustrated in FIGS. 1 to 6. It may be formed in a shape larger than the optical axis (CC) of the 110. Therefore, the emission unit 230 of the present exemplary embodiment may focus the light beam L3 ′ closer to the optical axis C-C of the lens body 110.

As in the present embodiment, when the angle θ3 'between the linear emission surface 136 and the optical axis CC is appropriately adjusted, it can be seen that the light distribution range of the light transmitting lens 100 can be easily adjusted according to the lighting environment and situation. have.

8 and 9 are reference diagrams showing the paths of travel of the light beams L1, L2, and L3 according to the shapes of the inclined exit surfaces 338 and 438 of the light transmitting lenses 300 and 400 according to another exemplary embodiment of the present invention. . 8 to 9 schematically show paths of travel of the light beam L3 when the inclined exit surfaces 338 and 438 are formed in the same direction as the light beams L1, L2, and L3 of the light emitting device 102. . In this case, the same reference numerals as those shown in FIGS. 1 to 6 in FIGS. 8 and 9 denote the same members.

Referring to FIG. 8, the inclined emission surface 338 of the second emission unit 134 is formed closer to the optical axis C-C than the traveling direction of the light ray L3 passing through the lens body 110. That is, the angle formed between the inclined exit surface 338 and the optical axis C-C is smaller than the angle θ3 formed in FIGS. 1 to 6.

When formed as described above, the light beam L3 may not be transmitted to the portion S of the inclined emission surface 138 of FIG. 8 that is relatively increased than the inclined emission surface 138 formed in FIGS. 1 to 6. Therefore, the overall size of the light transmitting lens 300 may be unnecessarily increased, and the manufacturing cost may also increase. In addition, there is a possibility that some of the light beams L2 emitted through the first emission unit 132 are reincident to the inclined exit surface 338.

Referring to FIG. 9, the inclined emission surface 438 of the second emission unit 434 is formed farther from the optical axis C-C than the traveling direction of the light ray L3 passing through the lens body 110. That is, the angle formed between the inclined exit surface 138 and the optical axis C-C is larger than the angle θ3 formed in FIGS. 1 to 6.

When formed in this way, the light beam L3 transmitted to the inclined exit surface 438 of FIG. 9 may be totally reflected. That is, when the angle of inclination of the light emitting surface 438 is greater than or equal to the critical angle reflecting the light L3, the light ray L3 is totally reflected by the light emitting surface 438 and then may be emitted to the outside while refracting through the straight light emitting surface 436. have. Therefore, the light efficiency of the light transmitting lens 400 may be reduced due to the total reflection of the inclined exit surface 438 and the light beam L3, and the beam pattern of the light transmitting lens 400 may be unevenly distributed.

Looking at the operation and test results of the light transmitting lens 100 according to an embodiment of the present invention configured as described above are as follows. Hereinafter, for convenience of description, the light-transmitting lens 100 illustrated in FIGS. 1 to 6 will be described.

6 is a view showing a light distribution simulation result of the light transmitting lens 100 according to an embodiment of the present invention, Figure 7 is a light illuminance curve of the light transmitting lens 100 according to an embodiment of the present invention Drawing.

First, the light beams L1, L2, and L3 emitted from the light emitting element 102 are incident to the inside of the lens body 110 through the incident part 120. In this case, the light rays L1, L2, and L3 emitted from the light emitting device 102 may be refracted at a predetermined angle in the incident part 120.

The light beams L1, L2, and L3 incident to the lens body 110 pass through the lens body 110 and are emitted to the outside through the emission unit 130. In this case, the light rays L1, L2, and L3 passing through the lens body 110 may be refracted by the output unit 130 at a predetermined angle.

As described above, the light rays L1, L2, and L3 emitted from the light emitting device 102 may be focused while being refracted only by the total reflection of the incident part 120 and the exit part 130. 3 and 4 partially illustrate the paths of the light beams L1, L2, and L3 that are distributed through the light transmitting lens 100.

Here, the light beam L1 passing through the lens body 110 along the optical axis CC among the light beams L1, L2, and L3 incident on the incident part 120 is formed through the center of the first output part 132. Can be launched by the same path as (CC).

The light beam L2 passing through the central portion of the lens body 110 among the light beams L1, L2, and L3 incident on the incident part 120 may be emitted to the front through the first emission part 132. Among the light rays L1, L2, and L3 incident to the incident part 120, the light beam L3 passing through the edge portion of the lens body 110 is passed through the straight exit surface 136 of the second emission part 134. Can be fired forward.

As described above, the light-transmitting lens 100 of the present embodiment performs light distribution of the light beams L1, L2, L3 using only refraction without reflecting the light beams L1, L2, L3 of the light emitting element 102. Optical loss due to reflection of L1, L2, L3) can be excluded.

On the other hand, the light rays L1, L2, L3 emitted from the light transmitting lens 100 of the present embodiment are condensed in an asymmetrical shape by the first output unit 132 formed in an asymmetrical shape and then distributed in an asymmetrical beam pattern. Can be.

When light distribution is performed in the asymmetric beam pattern as described above, the light distribution efficiency may be maximized in an environment of illuminating the exterior and signboard of a building or sculpture, or an environment of illuminating a rectangular bottom surface instead of a square bottom.

6 shows the results of performing light distribution simulation using the light transmitting lens 100 according to the embodiment of the present invention. In general, the asymmetric light converging light distribution of this embodiment has a different beam angle (D, E) radially compared to the conventional symmetrical light converging light distribution.

Referring to the light distribution result shown in FIG. 6, it appears that the beam axis D of 50 degrees with respect to the first optical axis plane AA of the optical axis planes AA and BB shown in FIG. 2 is shown, and the optical axis plane shown in FIG. 2. It is shown that it has a beam angle E of 80 degrees with respect to the 2nd optical axis plane BB among (AA, BB). However, the present invention is not limited thereto, and the beam angles D and E may vary depending on design conditions of the light transmitting lens 100 and types of optical axis planes A-A and B-B.

FIG. 7 shows an illuminance curve using the light transmitting lens 100 according to the embodiment of the present invention. The beam pattern of the light transmitting lens 100 may be formed in an oval asymmetric shape. Therefore, in a specific lighting environment or light distribution conditions, light distribution efficiency may be higher than that of a conventional circular beam pattern.

In particular, the asymmetric light converging light distribution according to the present embodiment can be used more efficiently in an environment requiring uniformity than the generally used symmetric light condensing light distribution, and is relatively relatively in the rectangular one instead of the square one. More uniform lighting can be provided.

Although the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And various modifications and changes may be made thereto without departing from the scope of the present invention. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

100, 200, 300, 400: Floodlight lens
102: light emitting element
110: lens body
120: entrance part
130, 230, 330, 430: exit
132: first exit
134, 234, 334, 444: second exit
136, 236: straight exit
138, 338, and 438: sloped slope
L1, L2, L3, L3 ': Ray
AA, BB: optical axis plane
CC: optical axis

Claims

A light transmitting lens for distributing light rays emitted from a light emitting element,
A lens main body disposed in front of the light emitting element and configured to pass light rays of the light emitting element;
An incidence portion formed on a rear portion of the lens body facing the light emitting element so that the light beam of the light emitting element is incident; And
An emission unit formed on a front surface of the lens body such that light incident on the incident unit is emitted toward the front of the lens body;
Including;
At least one of the incidence portion or the emission portion is formed in an asymmetrical shape to condense and distribute light rays of the light emitting device in an asymmetrical shape,
An edge portion of the exit portion is formed of a light-transmitting lens having a linear cross-sectional shape in which the light rays of the light emitting element can come out at the maximum luminous intensity.

The method of claim 1,
At least one of the incidence portion or the exit portion is a transmissive lens formed to have a different cross-sectional shape on the optical axis planes including the optical axis of the lens body.

3. The method of claim 2,
At least one of the incidence portion or the output portion is a light-transmitting lens formed of an elliptical dome structure around the optical axis.

The method of claim 1,
The exit unit,
A first emission part formed in the center of the front part of the lens body and formed of an elliptical dome structure around the optical axis of the lens body; And
A second emission part formed to surround the outer circumference of the first emission part, and the emission part of the light beam having a straight cross-sectional shape so that the light beam of the light emitting device can be emitted at maximum brightness;
Floodlight lens having a.

5. The method of claim 4,
The second output unit,
A straight exit surface formed in the shape of an outer circumferential surface of any one of a cone or a cylinder having an optical axis of the lens body as a central axis; And
An inclined exit surface inclined between the straight exit surface and the first exit unit;
Floodlight lens having a.

The method of claim 5,
And the angle between the linear emission surface and the optical axis is set so that the light beam of the light emitting element can come out at the maximum luminous intensity.

The method of claim 5,
The inclined emission surface is a transmissive lens, characterized in that formed inclined in the same direction as the traveling direction of the light rays passing through the lens body.

8. The method according to any one of claims 1 to 7,
The incident part and the exit part is a transmissive lens formed so as to focus the light of the light emitting element only in a refractive system.

A light transmitting lens for distributing light rays emitted from a light emitting element,
A lens main body disposed in front of the light emitting element and configured to pass light rays of the light emitting element;
An incidence portion formed on a rear portion of the lens body facing the light emitting element so that the light beam of the light emitting element is incident; And
An emission unit formed on a front surface of the lens body such that light incident on the incident unit is emitted toward the front of the lens body;
Including;
At least one of the incidence portion or the emission portion is formed in an asymmetrical shape to condense and distribute light rays of the light emitting device in an asymmetrical shape,
The incident part and the exit part is a transmissive lens formed so as to focus the light of the light emitting element only in a refractive system.

10. The method of claim 9,
At least one of the incidence portion or the exit portion is a transmissive lens formed to have a different cross-sectional shape on the optical axis planes including the optical axis of the lens body.

The method of claim 10,
At least one of the incidence portion and the exit portion is a light-transmitting lens formed of an elliptical dome structure around the optical axis.