KR20120003084A - Led diffusion lense, light diffusing sheet using it and light apparatus having it - Google Patents

Abstract

PURPOSE: An LED diffusion lens, a diffusion lens sheet using the same, and a lamp including the same are provided to save energy by widening an irradiation range and maintaining light quantity. CONSTITUTION: A concave lens unit(21) is formed with ± 15 to 30 degrees based on a central axis. A positive deflection convex lens unit(22) is formed on the edge with 15 to 30 degrees. A negative deflection convex lens unit(23) refracts the outer light of an LED source within the irradiation range of the positive deflection convex lens unit. The concave lens unit has a focal distance of 0.1 to 8 mm range.

Description

LED light diffusing lens, diffused lens sheet using the same, and luminaire having same {LED DIFFUSION LENSE, LIGHT DIFFUSING SHEET USING IT AND LIGHT APPARATUS HAVING IT}

The present invention relates to an LED light diffusing lens, a diffusion lens sheet using the same, and a luminaire having the same, and more particularly, LED light diffusing lens to prevent hot spots even while light is effectively and evenly distributed. A seat and a luminaire having the same.

In general, a light emitting diode (LED) is a device that generates a small number of carriers (electrons or holes) injected using a P-N junction structure of a semiconductor and emits light by recombination thereof.

LEDs are widely used in various display devices, various home appliances, and various automation devices because they emit light with high efficiency at low voltage.

1 is a view for explaining a conventional LED light source module, as shown in the LED light source module is a lead body 11 having a lead terminal, a module body formed with a molding material injection space inside the lead frame 11 12, an LED chip 13 mounted to be located inside the module body 12, a lead wire 14 for energizing the LED chip 13 and the lead frame, and a molding material injection space of the module body 12 It is provided with a molding material 16 that is filled in to protect the LED chip and the lead wire. And, the upper portion of the module body 12 is coupled to the lens 18 is coupled by the adhesive to improve the light divergence efficiency. The lens 18 is configured in various forms to focus or diffuse the light emitted from the light source.

For example, Korean Patent Registration No. 10-0756174 discloses a first lens unit 200 made of a convex aspheric lens in the center of a transparent body 110 in order to focus light diffused to a specific region as shown in FIG. 2A. The LED condensing lens including the second lens unit 300 surrounding the edge portion of the first lens unit 200 is disclosed.

In addition, Korean Patent Publication No. 10-2009-0026671 discloses a concave lens shape 110 at a portion facing the central axis of the LED 130 as the point light source, as shown in FIG. Disclosed is a point light source diffuser lens for a backlight formed in the convex lens shape 120.

According to the aforementioned Patent Registration No. 10-0756174, it is possible to condense light to a specific area, and thus has an advantage of efficiently using light that is wasted in unnecessary parts. However, the LED condensing lens has a problem in that light spots (hereinafter, referred to as hot spots) are formed due to different illuminance or luminance of light when the lamp is manufactured using the light concentrating in a specific area. Will cause. In particular, in the case of LED lamps (hereinafter referred to as LED fluorescent lamps) manufactured by arranging a plurality of LEDs on a flat plate to replace the conventional fluorescent lamps, numerous hot spots are generated on the light diffusion plate, resulting in low illuminance and light on the diffuser plate surface. The nonuniform distribution causes a problem that the aesthetics are also very poor.

In addition, the aforementioned Patent Publication No. 10-2009-0026671 has the advantage that the illumination or luminance is kept constant at a predetermined distance by dispersing the light concentrated in the central axis toward the farther from the central axis. However, the spot light source diffusion lens for the backlight also has a hot spot in the angular portion of the center, and to solve this, a separate microbead 250 must be configured on the diffusion lens 200, and this microbead ( Since 250 is refracted or scattered, the waste of light is severe and the efficiency is lowered. In addition, since the light is concentrated only on the concave lens shape 210 facing the central axis of the LED 230 and the light is narrowly diffused on both sides of the spot light source diffusion lens for the backlight, the LED fluorescent lamp In the case of the illuminance or luminance is uneven, there is still a limit that many hot spots are generated.

In particular, the LED fluorescent lamp is to remove and install the ceiling finish of the building, the thickness of the fluorescent light fixture is slimmer for the convenience and interior effect of the installation of the anti-deformation lighting fixture of the building structure and the LED light source and light diffuser plate The shorter the distance is, the more hot spots are generated. Therefore, in order to spread and spread LED fluorescent lamps, which are being spotlighted for energy saving, it is essential to reduce the hot spots as well as to efficiently emit light, which is an important challenge in this field.

In addition, although LED light sources are energy efficient, they emit a lot of heat, and when exposed to such heat, the amount of light is significantly reduced and the lifespan is shortened. However, conventional LED fluorescent lamps are too dense in order to eliminate hot spots. As a result, the heat is excessively released and the temperature rises between each other, which lowers the energy efficiency of the LED light source, shortens the lifespan, and increases the manufacturing cost.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, and an object thereof is to provide an LED light diffusion lens, a diffused lens sheet using the same, and a luminaire having the same, in which light does not generate hot spots evenly and efficiently.

Another object of the present invention, LED light diffusion lens that can be effectively used as a light source module of the LED fluorescent lamp by preventing a hot spot even if the distance between the LED light source and the light diffusion plate is short, provided with a diffusion lens sheet using the same, and To provide one luminaire.

In order to achieve the above object, the LED light-diffusion lens according to the present invention, in the LED light-diffusion lens for diffusing the light emitted from the LED light source, ± 15 relative to the central axis of the central light so as to diffuse the central light of the LED light source A concave lens portion formed at an angle of ± 30 °; A forward deflection convex lens portion which is formed at an angle range of 15 to 30 ° successively to the edge of the concave lens portion and is formed eccentrically so that the floor portion is located on the outer side; And a convex part formed successively in the forward deflection convex lens part, and a floor portion is eccentrically formed so as to be in contact with the boundary with the forward deflection convex lens part, thereby refracting the outside light of the LED light source to the irradiation range of the forward deflection convex lens part. It characterized in that it comprises a reverse deflection convex lens portion.

In this case, the concave lens portion is formed in a concave lens shape having a focal length in the range of 0.1 to 8 mm, and the forward deflection convex lens portion is a distance between the both ends of the forward deflection convex lens portion when the position of the floor portion is D. It is formed to have a curved surface at a position corresponding to (0.30 to 0.85) D / 2 at the center thereof and deflected toward the reverse deflection block lens portion, and a focal length of 0.1 to 5 mm may be applied.

Further, the concave lens portion is formed in a concave lens shape having a focal length in the range of 0.1 to 8 mm, and the forward deflection convex lens portion is formed by a plurality of small biconvex lens protrusions which protrude in succession toward the reverse deflection block lens portion side. It is formed, and when the distance between the both ends of the plurality of small bi-lens lens projection D is formed in a structure in which the height is sequentially raised so that the position of the highest point is in the position corresponding to (0.30 ~ 0.85) D / 2 from its center Applicable

On the other hand, the inner surface of the LED light diffusing lens may be formed in a planar structure, or a hemispherical groove structure having an inner arc length of πd / 2 when the diameter of the emitter side of the LED light source is d.

In order to achieve the above object, the diffusion lens sheet using the LED light diffusing lens according to the present invention is characterized in that the plurality of LED light diffusing lenses described above are integrally arranged and formed on a sheet having light transmittance.

In order to achieve the above object, a luminaire having an LED light diffusing lens according to the present invention comprises a light source module in which a plurality of LED light sources are arranged at predetermined intervals; A diffusion lens sheet formed of a sheet having light transmittance and having an LED light diffusion lens integrally formed at a position corresponding to the LED light source; A light diffusion plate disposed in proximity to the diffusion lens sheet; And a luminaire body in which the light source module, the diffusion lens sheet, and the light diffusion plate are sequentially mounted.

In addition, the light diffusion plate is preferably disposed to have a separation distance of about 10 ~ 20mm from the conversion lens sheet.

The LED light diffusing lens of the present invention comprises a concave lens portion, a forward deflection convex lens portion, and a reverse deflection convex lens portion, so that the irradiation range of the light can be widened while maintaining a constant amount of light required for illumination, so that the LED light source having high light output is used as a lighting device. Even if applied, hot spots are not generated at all and the gap between LED module and light diffuser is narrower than that of conventional LED luminaires. Therefore, high light is distributed on light diffuser plate, which enables efficient lighting and saves energy and reduces carbon dioxide. Can contribute to the prevention of environmental pollution.

In addition, due to the effective light diffusion effect of the LED light diffusion lens, the LED placement interval can be widened in the LED module, thereby improving lighting efficiency by improving heat dissipation efficiency, as well as reducing manufacturing cost and extending the life of the LED light source. It has an effect.

In addition, the LED light-diffusion lens can widen the irradiation range of the light while maintaining a constant amount of light required for lighting, and thus can reduce the height of the luminaire, thereby making it possible to slim down the luminaire in comparison with the existing LED luminaire. It can also be used to prevent waste of resources, to reduce manufacturing costs and installation and maintenance costs, as well as to improve the convenience of use.

In addition, according to the LED light diffusing lens according to the present invention, since the irradiation range of the light can be widened, even if a light diffusing plate having high transmittance is not generated, a hot spot does not occur. It can be applied to double the energy efficiency.

1 to 2b are views for explaining a conventional LED light diffusion lens,
3A is a cross-sectional view showing an LED light diffusing lens according to an embodiment of the present invention;
3B is a cross-sectional view showing a modification of the LED light diffusing lens according to the embodiment of the present invention;
3C is a schematic enlarged view of portion A of FIG. 3A;
4 is a cross-sectional view showing an LED light diffusing lens according to another embodiment of the present invention;
5A is a cross-sectional view illustrating a diffusion lens sheet using an LED light diffusing lens according to an embodiment of the present invention;
5B is a cross-sectional view illustrating a modification of the diffusion lens sheet using the LED light diffusing lens according to the embodiment of the present invention;
6 is an exploded perspective view showing a luminaire having an LED light diffusing lens according to an embodiment of the present invention;
7 is a cross-sectional view of a main portion of a light diffusing plate applied to a diffusion lens sheet using a luminaire having an LED light diffusing lens according to an embodiment of the present invention;
8 is a view for explaining the operation of the luminaire having an LED light diffusing lens according to an embodiment of the present invention.

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

Figure 3a is a cross-sectional view showing an LED light diffusing lens according to an embodiment of the present invention, Figure 3b is a cross-sectional view showing a modified example of the LED light diffusing lens according to an embodiment of the present invention, Figure 3c is a schematic As the phosphorus magnification, the LED light diffusing lens according to the modified example of the embodiment is different only in its inner structure, and thus, the embodiment will be described with reference to one embodiment, and like parts will be described with the same reference numerals.

Referring to Figure 3a, the LED light diffusing lens 20 according to an embodiment of the present invention is installed on the light emitting side of the LED light source to diffuse the emitted light, the body surrounding the light emitting side of the LED light source The concave lens portion 21, the forward deflection convex lens portion 22, and the reverse deflection convex lens portion 23 are integrally formed.

In addition, the LED light diffusing lens 20 according to an exemplary embodiment is configured to utilize an LED having a Lambertian characteristic as a lamp among light emitting diode (LED) light sources. LEDs with Lambertian characteristics generally exhibit Lambertian patterns with respect to the angle, so that they have an angular width (Δη) of η = ± 60 ° (Δη = 120 °). It is necessary to adjust the irradiation range of light. Here, the directional angle width Δη refers to a range of angles that is half of the brightness at the front.

Light emitting diode (LED) light source 30 is referred to as an LED module, a lead frame (not shown) having lead terminals, a module body 31 having a molding material injection space formed inside the lead frame, and a module body. LED chip 32 mounted to be located inside the 31 and the molding material (not shown) is filled in the molding material injection space of the module body 31 to protect the LED chip and the lead wire.

The concave lens portion 21 is formed in the center portion so as to diffuse the central light of the LED light source, the angle range of ± 15 to ± 30 ° relative to the central axis (a) of the LED light source 20 (that is, 30 ~ 60 ° angle range). At this time, the concave lens portion 21 is formed in the form of concave lens having a focal length in the range of 0.1 to 8mm.

The forward deflection convex lens portion 22 is formed in an angular range of 15 to 30 degrees at the edge of the concave lens portion 21 and is formed eccentrically so that the floor portion is located on the outer side.

In particular, the positive deflection convex lens portion 22 is constituted by the convex lens so that no hot spot is generated at the boundary with the light diffused by the concave lens portion 21, and the floor thereof is as shown in Fig. 3C. When the position of the portion (b) is D, the distance between both ends of the forward deflection convex lens portion is at a position corresponding to (0.30 to 0.85) D / 2 at its center (o; the center of the forward convex lens portion) and It is formed to have a curved surface deflected toward the deflection block lens portion 23 side. At this time, the positive deflection convex lens portion 22 is formed in the form of a convex lens having a focal length in the range of 0.1 to 5 mm.

The reverse deflection convex lens unit 23 is configured to irradiate the outside light of the LED light source 30 to be overlapped within the irradiation range of the forward deflection convex lens unit 22 to improve light efficiency and attenuate hot spots. It is formed in succession to one forward deflection convex lens portion 22, but the floor portion (c) is formed to be eccentric in the opposite direction so as to be located in contact with the boundary with the forward deflection convex lens portion 22 to define the outside light of the LED light source 20 The deflection is refracted in the irradiation range of the convex lens portion 22.

In addition, the reverse deflection convex lens portion 23 has a distance between the two ends of the reverse deflection convex lens portion at the center thereof (0.30 to 0.85) D, similarly to the positive deflection convex lens portion. It is formed to have a curved surface at a position corresponding to / 2 and deflected toward the above-mentioned deflecting block lens portion side. At this time, the reverse deflection convex lens portion 23 is formed in the form of a convex lens having a focal length in the range of 0.1 to 5 mm.

Meanwhile, the LED light diffusing lens 20 according to the present invention is formed using a material such as acrylic, polycarbonate, silicon, PET, which has excellent light transmittance and excellent moldability, and has a structure for light diffusion of a single LED light source. 3A and 3B, an extension part 24 is formed to extend downward from the reverse deflection ball roll lens part 23 to surround the module body 31 of the LED light source 20. Configure.

In addition, the inner surface of the LED light diffusing lens 20 is formed in a hemispherical groove structure having an inner arc length of πd / 2 when the diameter of the light emitting side of the LED light source 30 is d as shown in FIG. 3A. .

As such, when the inner surface of the LED light diffusing lens 20 is formed as a hemispherical groove structure, the diffusion angle of the light is widened, so that the irradiated surface having uniform illuminance is formed at a close position of about 10 to 20 mm as shown in a specific embodiment to be described later. It has the advantage of being.

In addition, the LED light diffusing lens 20 according to the present invention may be formed in a planar structure by the inner surface of the LED light diffusion lens 20 in contact with the light emitting portion side of the light source. As such, when the inner surface of the LED light diffusing lens 20 is formed in a planar structure, the manufacturing is very easy. However, in this case, the diffusion angle of the light is narrowed, so that an irradiated surface having a uniform illuminance is formed at a distance farther from the LED light source than the hemispherical groove structure.

4 is a cross-sectional view illustrating an LED light diffusing lens according to another exemplary embodiment of the present invention. In addition, detailed description is abbreviate | omitted about the structure similar and similar to one Embodiment mentioned above.

Referring to FIG. 4, the LED light diffusing lens 40 according to another embodiment of the present invention includes a concave lens part formed at an angle range of ± 15 ° to ± 30 ° based on the central axis a of the LED light source 30. 41), the positive deflection convex lens portion 42 and the positive deflection convex lens portion which are formed in an angular range of 15 to 30 degrees successively at the edges of the concave lens portion 41 and eccentrically so that the floor portion b is located on the outer side thereof. A reverse deflection convex lens portion 43 is formed to be eccentrically reversed so that the floor portion is in contact with the boundary with the forward deflection convex lens portion 42, and the forward deflection convex lens portion 42 is reverse deflection. It is formed by a plurality of small double-lens lens protrusions 42a projecting in a direction biased toward the block lens portion 43 side.

When the distance between both ends of the plurality of small double-lens lens protrusion 43a described above is D, the height is sequentially formed so that the position of the highest point is at a position corresponding to (0.30 to 0.85) D / 2 at the center thereof. do.

In addition, although the positive deflection convex lens portion 42 may constitute two or four small biconvex lens protrusions 42a or more, in the present embodiment, as shown in FIG. 42a) are arranged in succession, and the floor height is gradually increased, and the floor portion c of the third small convex lens protrusion 42a is positioned at (0.30 to 0.85) D / 2 at the center thereof. have.

5A is a cross-sectional view showing a diffusion lens sheet using an LED light diffusing lens according to an embodiment of the present invention, and FIG. 5B is a cross-sectional view showing a modified example of a diffusion lens sheet using an LED light diffusing lens according to an embodiment of the present invention. to be.

5A and 5B, the diffusion lens sheet 50 using the LED light diffusing lens is formed in a structure in which the above-described LED light diffusing lenses 20 are arranged in a planar sheet. That is, the planar sheet is formed using a material such as acrylic, polycarbonate, silicone, PET, and the LED light diffusing lens 20 is integrally formed on the upper side where the LED light source 30 is located. 20 is configured to be connected by the connecting portion 51 of the flat plate structure.

In addition, when the inner surface of the LED light diffusing lens 20 has a planar structure, the diffusion lens sheet 50 using the LED light diffusing lens is formed in the shape shown in FIG. 5B, and the inner surface of the LED light diffusing lens 20 is hemispherical. In the case of the structure is formed in the form shown in Figure 5a.

6 is an exploded perspective view showing a luminaire having an LED light diffusing lens according to an embodiment of the present invention, Figure 7 is applied to a diffused lens sheet using a luminaire having an LED light diffusing lens according to an embodiment of the present invention It is sectional drawing of the principal part of the light-diffusion plate.

Referring to FIG. 6, a luminaire having an LED light diffusing lens according to the present invention includes a light source module 60 in which an LED light source 30 is arranged, a diffusion lens sheet 50 installed in contact with the light source module 60, And a light diffusing plate 70 spaced apart from and installed to have a predetermined distance from the diffusion lens sheet 50, respectively, in the luminaire body 80 in order.

The light source module 60 is arranged on the printed circuit board 61 such that a plurality of LED light sources 30 have a predetermined interval. In the present embodiment, as described above, the light diffusion module 60 emits light evenly in a wide range. By applying the LED light diffusing lens 20 it is possible to widen the front, rear, left and right installation interval of the LED light source 30 as much as possible to reduce the amount of installation of the LED light source 30 can be reduced material and assembly costs. In particular, since the installation interval between the LED light source 30 is widened, the cooling efficiency to determine the lighting efficiency of the LED chip is improved to have the advantage of maximizing the lighting efficiency and the life of the LED.

 The diffusion lens sheet 50 is formed by integrally forming a plurality of light diffusion lenses on the sheet so as to be in a position corresponding to the LED light source, as shown in Figure 6, a separate LED light diffusion lens for each LED light source It may also be configured to form.

The light diffusion plate 70 is disposed to be close to the diffusion lens sheet 50 to further diffuse the light via the LED light diffusion lens 20 to double the uniformity of the indoor lighting to improve the lighting effect. To this end, the light diffusion plate 70 is integrally embedded with a plurality of reflectors 72 having different refractive indices inside the diffuser plate body 71 having light transparency. The fixed frame 73 is coupled to the edge of the light diffusion plate 70 so as to be mounted on the luminaire body 80 to be described later.

The diffusion plate body 71 is formed by molding an acrylic (MMA: Methy methacrylate) or polycarbonate material into a plate shape, and integrating the reflector 72 into the molding process.

As shown in FIG. 7, the reflector 72 has a refractive index different from that of the diffuser body 71 and is 0.1 to 1 mm using at least one of materials such as glass, silicon, optical fiber, and crystal. It forms as the sphere which has a particle size of a range.

When the light diffusion plate 70 is formed as described above, even though light is irregularly incident on the incident surface of the light diffusion plate 70, the reflectors 72 having different refractive indices in the process of moving the light beam to the exit surface Since various refractions, reflections, and total reflections are repeated depending on the conditions of the numerous interfaces as the light passes through), light irregularly concentrated on the incident surface is uniformly diffused at the exit surface and then irradiated toward the illumination space.

The luminaire body 80 is a frame-shaped member into which the light source module 60, the diffusion lens sheet 50, and the installation groove 81 into which the light diffusion plate 70 is inserted and installed are recessed inwards. Although not limited, the present embodiment is formed in a rectangular frame shape so as to replace a fluorescent lamp widely used as an indoor lighting. Accordingly, the luminaire with the LED light diffusing lens according to the present embodiment has the advantage that it can utilize the luminaire body for fluorescent lamps installed on the existing ceiling as it is.

Hereinafter, the operation of the LED light diffusing lens and the luminaire having the same according to the present invention through a specific embodiment.

 8 is a view for explaining the operation of the luminaire having an LED light diffusing lens according to an embodiment of the present invention.

6 and 7, a luminaire having an LED light diffusing lens includes a printed circuit board 61 in which an LED light source 30 is formed in a rectangular shape corresponding to the size of the installation groove 81 of the luminaire body 80. Arrange the installation interval so that the distance from the central axis (a) of the LED light source 30 is approximately 69mm to prepare the light source module 60, and at the same position as the arrangement position of the LED light source 30 The diffusion lens sheet 50 is formed by using an acrylic resin to prepare the LED light diffusing lens 20.

The LED light diffusing lens 20 formed on the diffusion lens sheet 50 has a concave lens having a focal length of 8 mm so as to have a angular range of ± 30 ° (total angle 60 °) with respect to the central axis a of the LED light source. The lens portion 21 is formed, and the positively-convex convex lens portion 22 is formed so that the convex lens having a focal length of 5 mm from the edge of the concave lens portion 21 is within an angle of 30 degrees, and the floor portion (b) It is formed to be curved so that the position of is at the point of 0.8D / 2 from the center with respect to the distance (D) between the both ends of the positive deflection convex lens portion 22.

The light diffusion plate 70 uses acrylic as a material of the diffusion plate body 71, and the reflector 72 is formed of spheres having a particle diameter in the range of 0.1 to 1 mm, respectively, of polycarbonate, glass, silicon, and optical fiber. Apply. The manufacturing method of the light diffusion plate 70 will be described in more detail. First, an acrylic resin for molding the diffusion plate body 71 is prepared, and the reflector 72 is introduced into the acrylic resin, but the reflector 72 is provided. After the stirring process is carried out so as to be equally distributed, an acrylic resin in which the reflector 72 is mixed is molded into a mold (mould). At this time, the ratio of spheres formed of polycarbonate, glass, silicon, and optical fiber is added in a weight ratio of 1: 1: 1: 1, respectively, so that the total weight of the spheres is 1 to 5% by weight relative to the total weight of the acrylic resin. It is desirable to.

As described above, when the light source module 60, the diffusion lens sheet 50, and the light diffusion plate 70 are prepared, the light source module 60 and the diffusion lens sheet 50 are integrated with each other. Assemble sequentially in the installation groove (81). At this time, the light diffusing plate 70 is very important because the separation distance with the diffusion lens sheet 50 should consider the installation interval of the LED light source and the optical characteristics of the LED light diffusing lens. In this embodiment, assembling is arranged so as to have a separation distance of about 10 to 20 mm from the conversion lens sheet 50.

When the assembly of the luminaire including the LED light diffusing lens is completed and the power is supplied, the light is emitted by the lighting of the LED light source 30 is diffused while passing through the LED light diffusing lens 20 and the light diffusion plate 70 Once again diffused, light rays are emitted into the external illumination space.

At this time, the light passing through the concave lens portion 21 is irradiated to the e region of the light diffusion plate 70, and the light passing through the forward deflection convex lens portion 22 is refracted in the forward direction to the f region in contact with the e region. It can be seen that the light irradiated through the reverse deflection convex lens portion 23 is refracted in the reverse direction and irradiated to the f region. In the f region, light passing through the positive deflection convex lens portion 22 in which the amount of light is smaller than light passing through the concave lens portion 21 is irradiated, but light passing through the reverse deflection convex lens portion 23 is f. Since the area is irradiated redundantly, the difference in the amount of light is compensated. In addition, since the light of the forward deflection convex lens portion 22 and the reverse deflection convex lens portion 23 of the adjacent LED light source 30 is overlapped once again, it can be seen that the illuminance per unit area of the f region is approximated to the e region. have. According to this, even if the energy-efficient LED light source 30 is applied to a lighting device such as a fluorescent lamp, it is possible to efficiently light without any hot spots and to save energy and to prevent environmental pollution by reducing carbon dioxide. Can contribute to

On the other hand, in the luminaire having the LED light diffusing lens, the installation distance between the LED light source 30 (installed at a separation distance of about 69mm in this embodiment) due to the effective light diffusion action of the LED light diffusing lens 20 is significantly farther away. Therefore, the cooling efficiency is improved, so there is no need to install a separate heat sink, thereby reducing manufacturing costs, improving energy efficiency, and extending the life of the LED light source.

The luminaire with the LED light diffusing lens is also required for illumination by the LED light diffusing lens 20, which is composed of the concave lens portion 21, the forward deflection convex lens portion 22, and the reverse deflection convex lens portion 23. Since the irradiation range of the light can be widened while maintaining a constant amount of light, the upper and lower heights of the luminaires can be reduced, thereby making the luminaire slimmer, and the existing luminaire body can be utilized to prevent waste of resources, manufacturing costs and installation and maintenance. Not only can the maintenance cost be reduced, but it can also be convenient for use.

What has been described above is just one embodiment for implementing the LED light diffusing lens according to the present invention, the diffusion lens sheet using the same, and the luminaire having the same, the present invention is not limited to the above embodiment, the following patents As claimed in the claims, any one of ordinary skill in the art without departing from the gist of the present invention will have the technical idea of the present invention to the extent that various modifications can be made.

20, 40: LED light diffusing lens 21, 41: concave lens part
22, 42: forward deflection convex lens portion 23, 43: reverse deflection convex lens portion
30: LED light source 50: Diffusion lens sheet
60: light source module 70: light diffusion plate
80: luminaire body

Claims (7)

In the LED light diffusion lens for diffusing light emitted from the LED light source,
A concave lens portion formed at an angle of ± 15 to ± 30 ° with respect to a central axis thereof so as to diffuse central light of the LED light source;
A forward deflection convex lens portion which is formed at an angle range of 15 to 30 ° successively to the edge of the concave lens portion and is formed eccentrically so that the floor portion is located on the outer side; And
It is formed in succession to the positive deflection convex lens portion, but the floor portion is formed to be eccentric in the opposite direction so as to be located in contact with the boundary portion with the positive deflection convex lens portion to deflect the outside light of the LED light source to the irradiation range of the positive deflection convex lens portion. An LED light diffusing lens comprising a reverse deflection convex lens portion.
The method of claim 1,
The concave lens portion is formed in the concave lens shape having a focal length in the range of 0.1 to 8mm,
The forward deflection convex lens portion is located at a position corresponding to (0.30 to 0.85) D / 2 at the center of the floor when the position of the floor portion is a distance between both ends of the forward deflection convex lens portion, and the reverse deflection block lens An LED light diffusing lens is formed to have a curved surface deflected to the negative side, the focal length is 0.1 to 5mm.
The method of claim 1,
The concave lens portion is formed in the concave lens shape having a focal length in the range of 0.1 to 8mm,
The forward deflection convex lens portion is formed by a plurality of small double-convex lens protrusions projecting to be deflected successively toward the reverse deflection block lens portion side, and the position of the highest point when the distance between both ends of the plurality of small double-convex lens protrusions is D. LED light diffusion lens, characterized in that formed in a structure that the height is sequentially raised so that the position corresponding to (0.30 ~ 0.85) D / 2 at the center thereof.
4. The method according to any one of claims 1 to 3,
The inner surface of the LED light diffusing lens is a planar structure or a hemispherical groove structure having an inner arc length of πd / 2 when d is the diameter of the emitting part side of the LED light source.
A diffusion lens sheet using an LED light diffusing lens, characterized in that a plurality of claim 4 LED light diffusing lenses are integrally arranged and formed on a sheet having light transmittance.
A light source module in which a plurality of LED light sources are arranged at predetermined intervals;
A diffusion lens sheet formed of a sheet having light transmittance and integrally formed with the LED light diffusing lens of claim 4 at a position corresponding to the LED light source;
A light diffusion plate disposed in proximity to the diffusion lens sheet; And
And a light fixture body in which the light source module, the diffusion lens sheet, and the light diffusing plate are sequentially mounted.
The method of claim 6,
The light diffusion plate is a luminaire having an LED light diffusion lens, characterized in that arranged to have a distance of 10 ~ 20mm from the conversion lens sheet.

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