KR101053951B1 - Icicle type light adjustment lens for LED lighting device - Google Patents

Abstract

The present invention relates to an eyeglass type light adjusting lens for an LED (LED) lighting device, comprising a lens structure having a body which is made of any one selected from glass, acrylic plastic, or PMMA, and the whole of which is filled; The lens structure is formed in the normal direction in which the divergent light of the LED, which is the light source, is incident to form an inner surface of the lens structure, and has a form of acid and valleys, and is a left-right symmetrical structure in which a light adjustment protrusion such as icicle is formed in the center portion. Disclosed is a technical configuration including an inner surface formed with an aspherical aspherical surface and an outer surface formed by a spherical surface or an aspherical surface forming an outer surface of the lens structure.

The present invention has a very simple structure and acts as a light diffusing unit, which can lead to maximum efficiency as an indoor lighting device when applied to an indoor lighting device, and utilizes an aspherical surface, allowing the light diffusing angle to be arbitrarily adjusted freely. By adjusting the surface light source for the same area can be controlled evenly with the same brightness per area, eliminating the glare caused by the use of the existing LED can be induced to even brightness.

Lighting unit, diffused light, aspheric surface, icicle type, light adjusting protrusion, internal reflection / refraction

Description

Icicle type light adjustment lens for LED lighting device {ICICLE TYPE LIGHT ADJUSTING LENS FOR LED ILLUMINATION DEVICE}

The present invention relates to a light adjustment lens for use in the light distribution adjustment of the LED (LED) lighting device, more specifically, a very simple structure, but when applied to the indoor lighting device to maximize the efficiency as indoor lighting The present invention relates to an icicle type light adjusting lens for an LED lighting device that can function as a diffuser and to be controlled at an even brightness.

In general, lighting devices are used to illuminate the surroundings using various light sources. Recently, LEDs have been actively applied to light sources throughout the industry, including lighting devices, as well as researches on lighting systems for effective use of LEDs. It's going on.

1 illustrates an embodiment of a conventional LED lighting apparatus, and includes a packaged power LED having a primary lens 10 covered by an LED chip 30 used as a light source, and a secondary mounted on the primary lens. It consists of a lens 20, the light emitted from the LED chip 30 to adjust the divergent light through the lens portion of the primary lens 10 and the secondary lens 20 to have a directivity.

However, the light adjusting lens used in the conventional LED lighting apparatus having the structure as shown in FIG. 1 is a structure for inducing the direct light of the LED light source, and thus adopting the conventional LED lighting apparatus is quite inefficient to use the conventional LED lighting apparatus for indoor lighting. In the related art, the primary lens 10 and the secondary lens 20 including the LED chip 30, which is a light source, may be matched with the structural design and mutually matched products. Not only is it difficult to apply, but also has a large disadvantage of light loss, and there is a problem that the overall light adjustment efficiency is lowered.

In addition, it is not possible to eliminate the glare caused by the sparking point that has been pointed out as a conventional problem by having a central focusing light characteristic of the LED, there was a problem that does not induce even brightness due to the difficulty of light adjustment.

Further, the lens 10, 20 used as a light adjusting unit of the conventional LED lighting device has only a low degree of freedom for light adjustment because there is a problem that the light adjustment efficiency is lowered because it uses only one of the reflection or refraction of light, The structure was very complicated.

Meanwhile, in the conventional LED lighting device, a plurality of microlenses 40 are arranged on the upper surface of the secondary lens 20 applied as the light adjusting unit to perform light distribution adjustment such as light diffusion, but additional structures and many materials (micro Lens), the LED lighting device is structurally complicated or the product cost increases a lot, and in the past, there was a significant difficulty and difficulty in adjusting the divergent light of the LED such as light concentration and light diffusion, and the light distribution was arbitrarily There was a difficulty in free tuning.

The present invention has been devised in view of the above problems, and has a very simple structure, and when applied to an indoor lighting device, can maximize efficiency as indoor lighting, and utilizes an aspherical surface to arbitrarily freely diffuse light. Through the internal structure and reflection through the efficient structure design inside the center part, the light diffusion and light distribution can be adjusted to spread the central light with strong power of the LED light source to the left and right sides. The purpose of the present invention is to provide an icicle type light adjusting lens for LED lighting device that can be controlled evenly.

The present invention can function as a light diffusion unit to eliminate or minimize the glare caused by the centralized light and flash of the LED unique to the center, LED suitable for near-field irradiation of indoor lighting use and induces even brightness It is to provide an icicle type light adjusting lens for an illumination device.

The present invention is to be easily mounted and used in the existing LED chip, etc., and to design a structure that can produce a hat-shaped radiation pattern and to maximize the efficiency as an indoor lighting icicle type light adjustment lens for the LED lighting device To provide.

The present invention provides a light adjustment lens for the LED (LED) lighting device,

It is a lens structure having a body which is made of any one selected from glass, acrylic plastic or PMMA, the whole of which is filled; The lens structure is formed in the normal direction in which the divergent light of the LED, which is the light source, is incident to form an inner surface of the lens structure, and has a form of acid and valleys, and is a left-right symmetrical structure in which a light adjustment protrusion such as icicle is formed in the center portion. It is characterized in that it comprises a configuration including an inner surface formed aspherical aspherical surface and the outer surface of the spherical or aspherical surface to form the outer surface of the lens structure.

The lens structure is characterized in that the end of the light adjustment protrusion formed on the inner surface of the aspherical aspheric surface directly contact with the upper surface of the LED mounted on the lens structure or protrude as close as possible.

The lens structure is to adjust the light distribution to form a hat-shaped radiation pattern in the Cartesian coordinate system, and to adjust the light distribution to form a shield-shaped radiation pattern in the spherical coordinate system for the divergent light of the LED.

The present invention has a very simple structure and can act as a light diffusing unit to maximize efficiency as indoor lighting when applied to an indoor lighting device, and can adjust the light diffusing angle arbitrarily freely by utilizing an aspherical surface.

The present invention can be controlled evenly by the same brightness per the same area by adjusting the surface light source for the LED light source, and in particular, the structure design to increase power while spreading the light concentrated in the center of the LED unique left and right when lighting the existing LED It can eliminate or minimize the glare caused by the sparkling that is generated, and it can be suitable for near-field irradiation of indoor lighting and induce even brightness.

The present invention can be easily mounted and used in the existing LED chip, and the light adjusting part and the LED light source diverging part (LED chip) in the present invention can be configured in a one-to-one corresponding size to produce a compact size. In addition, there is no need for an additional application for light adjustment such as the arrangement of microlenses, and the light distribution density is continuously formed in the middle without interruption, and fine control adjustment and freedom of the light emitted from the LED can be increased. It is possible to produce hat-shaped radiation pattern in Cartesian coordinate system, and it is very useful to maximize lighting efficiency as interior lighting unit.

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

2 and 3, the icicle type light adjusting lens 100 for LED (LED) lighting apparatus according to the present invention is glass or acrylic plastic or polymethyl methacrylate excellent in light transmittance (hereinafter referred to as "PMMA") It is made of any one selected from among but consists of a lens structure 110 having a body that is filled with the entire interior.

The lens structure 110 is for accommodating and disposing an LED to be used as a light source, and the recess stepped part 111 is formed symmetrically with respect to the center at the lower end in the normal direction in which the divergent light of the LED is incident, and the recess end. It is formed as an aspherical surface of the left and right symmetrical structure is formed extending in the upper direction from the inside of the jaw portion 111 to have an approximately "M" shaped structure in the form of hills and valleys, but formed light adjustment protrusions 112a such as icicles in the central portion. It is composed of a configuration including an outer surface 113 by an aspherical surface or an aspherical surface extending in an upward direction from the outer side of the groove stepped portion 111 and the icicle (icicle) aspherical surface (111).

In this case, the recess step 111 may be any structural form as long as it can accommodate the light source diverging portion (eg, LED chip) of the LED.

The aspherical aspherical surface 112 of the lens structure 110 forms an inner surface of the lens structure and is a portion at which the divergent light of the LED begins to be incident and is provided to the divergent light of the LED mounted on the recess 111. It is a light distribution adjusting part that functions as an actual diffuse light unit, and induces the simultaneous action of internal reflection and refraction with respect to the emitted light of the LED through the light adjusting protrusion 112a formed like the icicle. In the inner surface of the left and right side portions 112b and 112c having the concave surface in the LED side direction except for the light adjusting protrusion 112a, the LED diffused light is refracted with respect to the divergent light of the LED so that the divergent light of the LED is uniformly diffused to become a surface light source. Done.

Here, when a portion where the upper surface of the mounting LED mounted on the lens structure 110 is located is referred to as the horizontal reference plane A, the light adjusting protrusion 112a such as an icicle formed at the center of the inner aspherical surface 112 of the icicle aspheric surface is formed. It is preferable to protrude so that the end of the length protruding downwards is in direct contact with the horizontal reference plane (A) or positioned as close as possible.

In other words, a distance of 0 to 0.3 mm may be most preferable between the horizontal reference plane A and the end of the light adjusting protrusion 112a of the lens structure 110, which is necessarily required for the center emitting light of the LED. In order to increase the light distribution adjusting efficiency by inducing reflection and refraction by passing through and colliding at one point of the light adjusting protrusion 112a, thereby increasing the overall brightness and power to increase the brightness over the entire area. For sake.

In addition, as the aspherical inner surface 112 is formed as an aspherical surface, the shape structure such as the adjustment of the bend angle of the inner surface can be easily changed design, it is possible to freely adjust the light distribution to the divergent light of the LED.

The outer surface 113 of the lens structure 110 forms the outer surface of the lens structure and transmits the light through the LED light source in the light diffusion and light adjustment state through the eyeball aspherical surface 112 in a forward direction Will be in charge.

The LED-type light adjusting lens 100 for an LED lighting device according to the present invention having such a configuration is a light adjusting unit that diffuses and adjusts a light distribution with respect to divergent light of an LED which is a light source, thereby treating a surface light source instead of a point light source. It is to use as appropriate.

Meanwhile, Table 1 below shows aspherical data for the icicle-type light adjusting lens 100 according to the present invention. The shape of the light adjusting lens 100 is schematically illustrated together with aspherical data for clarity.

Table 1. Aspherical data of an icicle type optical adjustment lens according to the present invention

Here, Table 1 shows a state in which R1 corresponding to the outer surface 113 has only a curvature value and is formed as a spherical surface, and is an optical distribution adjusting part that functions as an actual diffuse light unit for the emitted light of the LED. Aspheric inner surface 112 is formed as an aspherical surface and has been shown to have aspherical curvature value, aspherical conic constant (conic constant) and aspheric surface coefficient.

As a result, by adjusting the aspherical conic constant and aspheric coefficient with respect to the inner aspherical surface 112, the radiation path and the light distribution can be arbitrarily adjusted freely with respect to the divergent light of the LED.

FIG. 4 is simulation data showing a field-specific radiation path (light ray diagram) of light adjustment according to the incident of the LED divergent light through the eyeglass-type light adjusting lens 100 according to the present invention. Referring to the drawing which can be compared with the drawing that the rays of each field in FIG. 5 are shown below, it shows that the vertical radiation and the emitted light of a certain angle of view are directed in completely different directions in the 0.0 field. It can be seen that the light emitted in a vertical field of view and a certain field of view in 0.5 field is directed in the same direction due to internal reflection and refraction in the center, so that light can be finely controlled for each field and effective light amount adjustment can be performed as shown in FIG. Is showing.

FIG. 5 shows an illumination raster simulation chart for each field using the icicle-type light adjusting lens 100 of the present invention that performs diffuse light adjustment in the form of a light beam as shown in FIG. 4. The g functions are in the form that the radiant energy of the LED coming from the point points of each field is transmitted through the light adjusting lens 100 of the present invention. When the integrated energy distribution is integrated (combined) using Equation 1 below, as shown in FIG. 6, the total radiant energy distribution of the LED may be represented, and a hat-shaped (or stepped) emission may be generated in a rectangular coordinate system. Demonstrates that patterns can be formed.

[Equation 1]

This indicates that the icicle-type light adjusting lens 100 of the present invention can control light finely for each field in a manner that has not been conventionally performed at all, and when applied to an indoor lighting device, the efficiency as indoor lighting is improved. It is shown as data that light adjustment is performed as a diffused light unit which can lead to the maximum.

In addition, as shown in the figure shown in the upper left of Figure 5, the icicle-type light adjustment lens 100 of the present invention is the size of the LED light, which is the light source and the size of the inner circumferential surface 112 of the icicle aspherical surface 1 Correspondingly formed in one size, the size of the light adjusting lens 100 and the LED lighting device (product) can be reduced, and the product can be manufactured in a compact structure.

On the other hand, Figure 7 is a graph comparing the radiation pattern adjusted by the light distribution through the LED light adjustment lens 100 for the LED lighting apparatus according to the present invention and the original radiation pattern of the LED itself as a light source, the upper graph in the Cartesian coordinate system Shows the radiation pattern of and the lower graph shows the radiation pattern in the spherical coordinate system.

Referring to FIG. 7, when comparing the radiation patterns in the Cartesian coordinate system, the LED light source itself represents a Gaussian probability distribution type radiation pattern, and the icicle type light adjusting lens 100 according to the present invention is covered with a cover of the LED light source. When it is used, it shows that the light distribution density is adjusted by controlling the LED emission light finely for each field so that the light distribution density is adjusted by the hat-shaped (stepped) radiation pattern which is continuously formed in the middle.

In addition, when comparing the radiation pattern in the spherical coordinate system, the LED light source itself represents a circular radiation pattern, through which the light-type light adjustment lens 100 according to the present invention adjusts the light distribution to the shield-type radiation pattern. Is showing.

8 is a graph showing the light distribution density of the LED light source through the LED light adjusting lens 100 for the LED lighting apparatus according to the present invention, each of the light distribution density on the X-axis and Y-axis It shows that it forms the radiation of the surface light source radiating over a wide area without centralization.

9 is a comparative graph showing the pattern stability according to the actual use distance change in the present invention, the four graphs shown here are data that simulates the pattern stability according to the distance change, such as 2mm, 20mm, 200mm, 3000mm, the relationship to the distance change All of them show the same pattern of radiation and show that they are very stable and perform the same type of light adjustment even if the actual distance is changed.

Meanwhile, the icicle type light adjusting lens 100 according to the present invention is mainly intended to be used as a unit of an indoor lighting device, but sometimes used as an LED lighting device such as an electronic signboard in a 5 * 5 array as shown in FIG. 10. FIG. 11 shows an exemplary raster simulation chart used as the electronic display plate of FIG. 10, and the light beam is diffused by the icicle type light adjusting lens 100 according to the present invention which functions as a diffuse light unit. By overlapping the distributions, it shows that light is generated from a single lens, and the light distribution is adjusted and evenly distributed with the same brightness.

1 is an exemplary view showing a light adjusting lens applied to a conventional LED lighting apparatus.

Figure 2 is a bottom perspective view showing an icicle type light adjusting lens for the LED lighting apparatus according to the present invention.

3 is a cross-sectional view showing an icicle type light adjusting lens for LED lighting apparatus according to the present invention.

Figure 4 is a simulation data showing the field-specific radiation path of the light adjustment according to the incidence of the LED divergent light through the eye-shaped light adjustment lens according to the present invention.

Figure 5 is a field-by-field roughness raster simulation chart utilizing the eye-cycle type light adjustment lens of the present invention.

6 is a diagram showing a state of integrating the energy distribution emitted from each field point of the LED.

Figure 7 is a graph comparing the radiation pattern of the light distribution and the light emitting pattern itself through the LED light adjustment lens for LED lighting apparatus according to the present invention and the light source itself.

8 is a graph showing the light distribution density of the LED through the eye-shaped light adjustment lens for the LED lighting apparatus according to the present invention.

9 is a comparison graph showing the pattern stability according to the actual use distance change in the present invention.

10 is a view showing an example utilizing the LED light fixture of the display board using the eye-shaped light adjustment lens according to the present invention.

FIG. 11 is an example raster simulation chart used with the electronic display of FIG. 10. FIG.

Explanation of symbols on the main parts of the drawings

110: lens structure 112: the aspherical aspherical surface

112a: light adjusting protrusion 113: outer surface

Claims (3)

In the light adjusting lens for LED lighting device, It is a lens structure having a body which is made of any one selected from glass, acrylic plastic or PMMA, the whole of which is filled; The lens structure is formed in the normal direction in which the divergent light of the LED, which is the light source, is incident to form an inner surface of the lens structure, and has a form of acid and valleys, and is a left-right symmetrical structure in which a light adjustment protrusion such as icicle is formed in the center portion. Aspherical inner surface formed, Icicle type light adjustment lens for the LED lighting device, characterized in that the configuration comprising an outer surface by a spherical or aspherical surface to form the outer surface of the lens structure. The method of claim 1, The lens structure is an icicle type light adjustment for the LED lighting device, characterized in that the end of the light adjustment protrusion formed in the center of the inner aspherical surface to directly contact or protrude as close as possible to the upper surface of the LED mounted on the lens structure. lens. The method of claim 1, The lens structure is to adjust the light distribution to form a hat-shaped radiation pattern in the Cartesian coordinate system with respect to the divergent light of the LED, LED lighting device characterized in that to adjust the light distribution to form a shield radiation pattern in the spherical coordinate system Icicle type optical adjustment lens

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