KR101089786B1 - Asymmetric led lens for unilateral light projection and the led lamp using the same - Google Patents

Abstract

The present invention relates to an asymmetric type LED lens and an LED lamp using the same, which is capable of unidirectional projection for projecting light by emitting light to the front side which is the optical axis direction of the LED element and not limited to the side to be illuminated. A body portion having a recess formed in a concave groove, first and second reflection surfaces inclined with respect to the optical axis direction on the front surface of the body portion, a projection surface perpendicularly formed in the optical axis direction between the first and second reflection surfaces, and the first And an outer circumferential surface surrounding the second reflective surface and the projection surface.

According to the present invention, the glare is prevented from the front surface by projecting the light of the LED element to the front side in the optical axis direction without being radiated to the light, but limited to the side direction to be projected through the projection surface and the outer circumferential surface. Even without aiming, it has an excellent projection effect, light is smoothly diffused, and an excellent effect that can be effectively used in a projector or the like without a separate louver for preventing glare from the front is obtained.

Unidirectional Projection, Asymmetrical LED Lens, LED Lamp, Reflective Surface, Projection Surface, Aiming

Description

Asymmetric LED lens with unidirectional projection and LED lamp using the same {ASYMMETRIC LED LENS FOR UNILATERAL LIGHT PROJECTION AND THE LED LAMP USING THE SAME}

The present invention relates to an LED lens and an LED lamp using the same. More specifically, the front surface of the LED element does not emit light to the front side of the optical axis, and the light projection is limited to the side direction to be reflected to prevent glare on the front side. The projection effect is excellent even without aiming the ground, the ground or the wall, and the light is diffused smoothly by projecting the light in asymmetrical direction, and it is improved not to install a separate louver to prevent glare. The present invention relates to an asymmetric LED lens capable of one-way projection and an LED lamp using the same.

Currently, the LED lamp is a device that illuminates using the light projected from the LED element, and is used as an efficient light source because high power can be obtained while consuming low power.

Such LED lamps are used as floodlights and applied to landscape lighting, and are used to illuminate various sculptures or walls, and are also used as headlights of automobiles.

Such LED lamps often require light emission to the front and light projection in the lateral direction, depending on the intended use.

For example, when used to indirectly illuminate a wall or the like, or to be used for a headlamp of a vehicle, light is required to be directed toward a road instead of the front of the vehicle in order to prevent glare of the opposite vehicle driver.

On the other hand, the LED element used in such an LED lamp has a characteristic that the intensity of the projected light is different depending on the projection direction.

That is, as shown in FIG. 1A, the light intensity 15a of the light emitted from the upper surface of the LED element 10, that is, the central portion of the light emitting surface along the optical axis direction P direction is emitted from both sides of the light emitting surface. It has a stronger intensity distribution than (15b).

In addition, such an LED lamp has an LED lens 30 incorporating the LED element 10, the structure of the conventional LED lens 30 is shown in Figure 1b.

Such a conventional LED lens 30 is usually made of an acrylic material, the front surface 32 has a curved arc-shaped symmetric structure, has a body portion 35 made of acrylic material, the body of the body 35 In the rear, a groove 37 for mounting the LED element 10 is formed concave.

The LED lamp equipped with such a conventional symmetrical LED lens 30 has an even light projection to the front surface of the light emitting surface, as shown in Figure 2a, the optical axis direction (P) as shown in Figure 2b It has a 15 degree cone projection area S at the center.

Therefore, the LED lamp 50 equipped with such a conventional symmetrical LED lens 30 has an advantageous side because the irradiation distance is long in the optical axis direction (P), but the irradiation distance in the lateral direction, as well as the light intensity of the lateral illumination There is an unsuitable problem.

That is, as shown in Figure 2a, when indirect lighting of the wall 60 is required, if the direction of the LED lamp 50 is not directed toward the wall, the light intensity is small, the lighting area 70 is reduced, a plurality of LED It is required to use the lamp 50.

In addition, in order to aim the target object using the conventional LED lamp 50, the direction of the LED lamp 50 itself must be installed in a reverse direction, but there are many working sites that cannot be installed in such a manner.

In addition, when used as a projector had a lot of problems in use, such as the need to install a separate louver (louver) for preventing the glare of nearby people.

The present invention is to solve the conventional problems as described above, the purpose is to prevent light from being emitted to the front side in the optical axis direction of the LED element, and to project light by limiting to the side to be reflected to prevent the glare of the front side The present invention provides an asymmetric type LED lens capable of unidirectional projection and an LED lamp using the same.

Another object of the present invention is to have an excellent projection effect even without aiming the ground or wall, light is smoothly diffused, without a separate louver for preventing glare from the front The present invention provides an asymmetrical LED lens capable of improved unidirectional projection and an LED lamp using the same.

In order to achieve the above object, the present invention, in the LED lens used in the LED lamp, the body portion for embedding the LED element in the concave groove; First and second reflective surfaces inclined with respect to the optical axis direction on the front surface of the body portion; A projection surface perpendicularly formed in the optical axis direction between the first and second reflection surfaces; And an outer circumferential surface surrounding the first and second reflective surfaces and the projection surface; and reflecting the light projected from the LED element in one direction with respect to the optical axis direction through the first and second reflective surfaces, through the projection surface and the outer circumferential surface. Provided is an asymmetrical LED lens capable of one-way projection for external projection.

Therefore, in the present invention, the first and second reflecting surfaces occupy the entire front surface of the body part, and thus the light projection can be limited to the side to be illuminated without emitting light to the front surface in the optical axis direction of the LED element. .

The present invention preferably provides asymmetrical LED lenses capable of unidirectional projection, in which the first and second reflective surfaces are each formed in a semicircular cross section having a straight edge on one side and a semicircular edge on the other side, and formed in the same cross-sectional size. do.

In addition, the present invention preferably the projection surface is to share the upper and lower edges of the first and second reflective surface, respectively, the upper and lower corners, and to form a vertical edge on both sides connecting the straight edges of the first and second reflective surface It is formed in a rectangular cross section, and provides an asymmetrical LED lens capable of unidirectional projection formed in the center of the body portion.

And the present invention preferably provides an asymmetrical LED lens capable of unidirectional projection consisting of a circular side surface parallel to the optical axis direction, the outer peripheral surface shares the semi-circular corners of the first and second reflective surface.

In order to achieve the above object, the present invention provides an LED lamp that uses the light emitted from the LED element as a light source and projects the light through the lens, the asymmetrical LED lens; And an LED element mounted in the asymmetrical LED lens to emit light by power supply, wherein the asymmetrical LED lens includes a body part having an LED element embedded therein, and an inclined member with respect to the optical axis direction on the front of the body part. Light projected from the LED element, including a first and a second reflective surface, a projection surface perpendicularly formed in the optical axis direction between the first and second reflective surfaces, and an outer circumferential surface surrounding the first and second reflective surfaces and the projection surface The present invention provides a LED lamp capable of unidirectional projection, which reflects the light toward the optical axis in one direction through the first and second reflective surfaces of the LED lens and projects the light through the projection surface and the outer circumferential surface.

In another aspect, the present invention preferably provides a LED lamp capable of unidirectional projection to pass the light reflected primarily from the first reflecting surface to the projection surface, and then secondary reflection from the surface of the second reflecting surface.

The present invention preferably provides an LED lamp capable of unidirectional projection for refracting the primary reflected light from the second reflective surface through the outer circumferential surface and projecting it to the outside.

According to the asymmetric type LED lens and the LED lamp equipped with the unidirectional projection according to the invention according to the first and second reflecting surface formed on the front of the body portion, the light of the LED element does not emit light to the front surface in the optical axis direction In this case, the projection is limited to the lateral direction to be projected through the projection surface and the outer circumferential surface.

Therefore, according to the present invention, when the light emitted laterally through the projection surface and the outer circumferential surface is prevented from glare from the front surface of the LED lens, it is possible to effectively project light by limiting it to one side of the ground or wall. Even without aiming, it has excellent projection effect, light is diffused smoothly, and it can be effectively used in the projector without attaching a separate louver to prevent glare from the front.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 3, the asymmetrical LED lens 100 capable of unidirectional projection according to the present invention has a body portion 130 in which the LED element 110 is embedded in the concave groove 112.

The body 130 is made of an acrylic material, and has a first and second reflective surfaces 140a and 140b that are inclined with respect to the optical axis direction P on its front surface.

The first and second reflective surfaces 140a and 140b are for limiting and projecting the light projected from the LED element 110 to one side rather than the front side of the optical axis direction P. FIGS. 4A and 4B. As shown in FIG. 1, each has a semicircular cross section having straight edges 142a and 142b on one side and semicircular edges 144a and 144b on the other side, and is formed in the same cross-sectional size.

In addition, a projection surface 150 vertically formed in the optical axis direction P is formed between the first and second reflection surfaces 140a and 140b, and the projection surface 150 is the first and second reflection surfaces. The vertical edges 142a and 142b of 140a and 140b are shared at upper and lower edges, respectively, and the vertical edges 142a and 142b of the first and second reflective surfaces 140a and 140b are connected to each other. Corners 152a and 152b are formed on both sides to form a rectangular cross section. In addition, it is formed perpendicular to the center of the body portion 130.

The asymmetric type LED lens 100 capable of unidirectional projection according to the present invention includes a structure including an outer circumferential surface 160 surrounding the first and second reflective surfaces 140a and 140b and the projection surface 150. The same outer circumferential surface 160 has a structure consisting of circular side surfaces 162 sharing the semicircular edges 144a and 144b of the first and second reflective surfaces 140a and 140b and parallel to the optical axis direction P.

Therefore, in the structure as described above, the first and second reflective surfaces 140a and 140b occupy both the front surface of the body portion 130, and as a result, the light projected from the LED element 110 is emitted in the optical axis direction P. That is, blocking the front surface of the body portion 130, and both the first and second reflecting surfaces (140a, 140b) reflects laterally.

5a shows an LED lamp 180 equipped with an asymmetrical LED lens 100 capable of unidirectional projection in accordance with the present invention.

In the LED lamp 180 capable of unidirectional projection according to the present invention, the asymmetrical LED lens 100 is formed of the body portion 130 as described above, and is formed on the front surface of the body portion 130 inclined with respect to the optical axis direction P. A projection surface 150 vertically formed in the optical axis direction P between the first and second reflecting surfaces 140a and 140b, the first and second reflecting surfaces 140a and 140b, and the first and second reflection surfaces 140a and 140b. It is a structure provided with the reflecting surface 140a, 140b and the outer peripheral surface 160 which encloses the projection surface 150. As shown in FIG.

Therefore, the light projected from the LED element 110 is reflected in one direction with respect to the optical axis direction P through the first and second reflective surfaces 140a and 140b of the asymmetrical LED lens 100, and the projection surface Projected to the outside through the 150 and the outer peripheral surface (160).

That is, when the light directed toward the first reflecting surface 140a among the first and second reflecting surfaces 140a and 140b reaches the first reflecting surface 140a, the light is primarily directed toward the projection surface 150. Reflected, and is emitted to the outside of the body portion 130 through the projection surface 150, and then secondary reflected through the surface of the second reflective surface 140b and projected laterally without facing in the optical axis direction (P) do.

In addition, when the light directed toward the second reflecting surface 140b among the first and second reflecting surfaces 140a and 140b reaches the second reflecting surface 140b, the light passes through the second reflecting surface 140b. In the first reflection, the refracted through the outer peripheral surface 160 is projected to the outside of the body portion 130. At this time, the direction does not face in the optical axis direction P, but in a lateral direction.

The projection area S 'obtained by the LED lamp 180 equipped with the asymmetrical LED lens 100 capable of unidirectional projection according to the present invention is shown in FIG. 5B. Such a projection area S 'has a projection area that is biased by being biased toward one side by approximately 30 degrees with respect to the optical axis direction P. As shown in FIG.

Therefore, as shown in Figure 5a, when indirect lighting of the wall 185 is required, even if the direction of the LED lamp 180 toward the wall side, the light intensity is strong, the lighting area 190 is very large, one Sufficient lighting effect can be obtained even with the LED lamp 180.

6a shows a state in which the LED lamp 50 equipped with the symmetrical LED lens 30 according to the prior art is turned on for indirect lighting of a wall.

As can be seen in Figure 6a according to the conventional LED lamp 50, the light emission is strong toward the front surface of the optical axis direction (P) of the LED element 110, it can be seen that the glare, that is, glare occurs severely, the side Because there is little light to the wall of the wall, you need to use multiple LED lamps to get the indirect lighting effect of the wall.

However, the LED lamp 180 equipped with the asymmetrical LED lens 100 capable of unidirectional projection according to the present invention emits light toward the front surface of the optical axis direction P of the LED element 110 as shown in FIG. 6B. It is possible to prevent the glare of the front surface by projecting light only to the side of the side wall to be reflected, and the projection effect is excellent even without aiming the wall.

In addition, the LED lamp 180 capable of unidirectional projection of the present invention diffuses the light smoothly by projecting light in an asymmetrical direction, and as a result, most of the light is directed to the side wall, so that a wall is sufficient even with one LED lamp. Indirect lighting effect of can be obtained.

As described above, the asymmetric type LED lens 100 capable of unidirectional projection and the LED lamp 180 having the same include the first and second reflective surfaces 140a and 140b formed on the front surface of the body 130. Through the light emitted from the LED element 110 to the front surface of the optical axis direction (P) does not emit light, it is projected by limiting laterally through the projection surface 150 and the outer peripheral surface 160.

Therefore, when the light emitted laterally through the projection surface 150 and the outer circumferential surface 160 is used to prevent glare from the front surface of the LED lens 100, it is limited to one side to enable effective light projection. It has an excellent projection effect even without aiming the ground or the wall, and can be effectively used for the projector without installing a separate louver for preventing glare from the front.

Although the present invention has been described in detail with reference to specific embodiments thereof with reference to the accompanying drawings, the present invention is not limited to such specific structures. Those skilled in the art will be able to variously modify or change the embodiments of the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. Nevertheless, it will be apparent that all such modifications or design modifications to such simple embodiments will clearly fall within the scope of the present invention.

FIG. 1A is an explanatory diagram illustrating the intensity distribution of light emitted from an LED device according to directions of light.

Figure 1b is a perspective view of a symmetrical LED lens according to the prior art.

2A is an explanatory diagram showing light intensity when an LED lamp equipped with a symmetrical LED lens according to the prior art illuminates a wall indirectly.

2B is a cone diagram showing the projection angle of a symmetrical LED lens according to the prior art.

3 is a perspective view illustrating an asymmetric type LED lens capable of unidirectional projection according to the present invention.

4A is a plan view illustrating an asymmetric type LED lens capable of unidirectional projection according to the present invention.

Figure 4b is a side view showing an asymmetrical LED lens capable of unidirectional projection according to the present invention.

5A is an explanatory view showing light intensity when an LED lamp equipped with an asymmetric type LED lens capable of unidirectional projection according to the present invention indirectly illuminates a wall.

5B is a cone diagram showing the projection angle of the asymmetric type LED lens capable of unidirectional projection according to the present invention.

Figure 6a is a photograph showing a state in which the LED lamp equipped with a symmetrical LED lens according to the prior art projects the light.

6B is a photograph showing a state in which the LED lamp equipped with an asymmetrical LED lens capable of unidirectional projection according to the present invention projects light.

Description of the Related Art

10 ..... LED device 15a ..... Intensity of front light

15b .... both side light intensity 30 ..... LED lens

32 ..... Front 35 ..... Body

37 ..... Home 50 ..... LED Lamp

60 ..... wall 70 ..... lighting area

100 .... asymmetrical LED lens with one-way projection

110 .... LED element 112 ..... concave groove

130 .... Body portion 140a, 140b .... First and second reflective surface

142a, 142b .... Straight corners 144a, 144b .... Semicircular corners

150 .... projection surface 152a, 152b .... vertical edge

160 .... circumference 162 .... circular side

180 .... LED lamp with one-way projection

185 ..... wall 190 ..... lighting area

P ..... Optical axis direction S, S '..... Projection area

Claims (7)

In the LED lens used for the LED lamp, A body part 130 in which the LED element 110 is embedded in the concave groove 112; First and second reflective surfaces 140a and 140b inclined with respect to the optical axis direction P on the front surface of the body part 130; A projection surface 150 vertically formed in the optical axis direction P between the first and second reflection surfaces 140a and 140b; And An outer circumferential surface 160 enclosing the first and second reflective surfaces 140a and 140b and the projection surface 150 to reflect the light projected from the LED element 110 to the first and second reflective surfaces 140a. Asymmetrical LED lens capable of unidirectional projection, characterized in that to project to the outside through the projection surface 150 and the outer peripheral surface 160 by reflecting in one direction with respect to the optical axis direction (P) through (140b). The method of claim 1, wherein the first and second reflecting surfaces (140a, 140b) are each formed in a semi-circular cross section having a straight edge (142a), 142b on one side and semi-circular corners (144a, 144b) on the other side; , Asymmetrical LED lens capable of one-way projection, characterized in that formed in the same cross-sectional size with each other, the projection surface 150 is formed therebetween, the outer peripheral surface 160 is formed around it. 3. The projection surface 150 of claim 2, wherein the projection surfaces 150 share the straight edges 142a and 142b of the first and second reflection surfaces 140a and 140b to upper and lower corners, respectively. Vertical edges 152a and 152b connecting the straight edges 142a and 142b of the slopes 140a and 140b are formed on both sides to have a rectangular cross section, and are formed at the center of the body 130. Asymmetrical LED lens 100 capable of one-way projection. 3. The circular side surface 162 of claim 2, wherein the outer circumferential surface 160 shares semicircular edges 144a and 144b of the first and second reflective surfaces 140a and 140b and is parallel to the optical axis direction P. 4. Asymmetrical LED lens capable of unidirectional projection, characterized in that consisting of (100). In the LED lamp which uses the light emitted from the LED element as a light source and projects the light through the lens, Asymmetrical LED lens 100; And And a LED element 110 mounted in the asymmetrical LED lens 100 to emit light by power supply. The asymmetrical LED lens 100 has a body portion 130 in which the LED element 110 is embedded, and first and second half inclined with respect to the optical axis direction P on the front surface of the body portion 130. The projection surface 150 vertically formed in the optical axis direction P between the slopes 140a and 140b, the first and second reflection surfaces 140a and 140b, and the first and second reflection surfaces 140a. First and second reflective surfaces 140a and 140b of the asymmetrical LED lens 100 including light projected from the LED element 110, including a 140b and an outer circumferential surface 160 surrounding the projection surface 150. LED lamp 180 capable of unidirectional projection to reflect outward in one direction with respect to the optical axis direction (P) through the projection surface 150 and the outer circumferential surface (160). The method of claim 5, wherein the asymmetrical LED lens 100 passes the light reflected first from the first reflecting surface 140a to the projection surface 150, the secondary at the surface of the second reflecting surface (140b) LED lamp 180 capable of one-way projection, characterized in that for reflecting. The unidirectional projection LED of claim 5, wherein the asymmetrical LED lens 100 projects the light reflected primarily from the second reflective surface 140b through the outer circumferential surface 160 to be projected to the outside. Lamp 180.

Images