KR20180003213A - Led light utilizing rounded surface mirror as reflecting mirror - Google Patents

Abstract

More particularly, the present invention relates to an LED light fixture which uses a curved mirror (concave mirror or parabolic mirror) as a reflector of an illuminating lamp and irradiates the LED with the LED light to uniformly and efficiently irradiate the light. The present invention relates to an LED lighting lamp.
The LED illuminating lamp using the curved mirror according to the present invention as a reflector has a curved mirror as a reflector, an LED light source disposed in the vicinity of the focus of the curved mirror, And an optical axis reflector for dispersing the light beam.

Description

{LED LIGHT UTILIZING ROUNDED SURFACE MIRROR AS REFLECTING MIRROR}

More particularly, the present invention relates to an LED light fixture which uses a curved mirror (concave mirror or parabolic mirror) as a reflector of an illuminating lamp and irradiates the LED with the LED light to uniformly and efficiently irradiate the light. The present invention relates to an LED lighting lamp.

The point light source and the linear light source emit light simultaneously in front and rear, but the LED light source has a feature that light is radiated forward only.

Therefore, the point light source and the light source are used to reflect the light radiated to the rear in the forward direction or to block the back radiated light, and the LED lamp is generally used to reflect the side beam only to be.

LEDs and the like use a reflector that reflects only the side beam, so that the reflector is made of a material having a reflective property, but the reflector is not made of a mirror.

Korean Patent Laid-Open Publication No. 10-2009-0122566 discloses a street lamp, which is provided with a concave mirror-shaped reflector.

However, the concave mirror is meaningful in the shape itself, and the concave mirror is not used as a reflector. That is, it is a technical feature that the reflector has a concave shape, and in the detailed description of the present invention, the reflector can be coated with a material having a high reflectance.

In order to increase the efficiency of the light source, a reflector is used, and the structure and shape of the reflector are described in Korean Patent Nos. 10-1130972, 10-1248092, 10-1381308, 10-1441624, 10-1564998, There are many examples of such improvements, but there are no technologies that use the reflector as a mirror surface.

Patent Document 1: Korean Patent Publication No. 10-2009-0122566 Patent Document 1: Korean Patent No. 10-1130972 Patent Document 1: Korean Patent No. 10-1248092 Patent Document 1: Korean Patent No. 10-1381308 Patent Document 1: Korean Patent No. 10-1441624 Patent Document 1: Korean Patent No. 10-1564998 Patent Document 1: Korean Patent Publication No. 10-2010-84766

An object of the present invention is to provide an LED lamp which can minimize glare by significantly reducing the amount of light entering the field of view by dispersing light by indirect illumination using a curved mirror as a reflector.

Also, it is intended to provide an LED lamp which can focus the light by positioning the LED light source in the vicinity of the focus of the curved mirror reflector so that the irradiation distance becomes long and the irradiation distribution can be evened.

It is also intended to provide an LED lighting lamp that is made of a curved mirror and has a light reflector added to the reflector so that the light source can be irradiated in a certain direction.

According to an aspect of the present invention, there is provided an LED lamp using a curved mirror as a reflector, wherein the curved mirror is a reflector, an LED light source is disposed near a focus of the curved mirror, And an optical axis reflector for dispersing the reflected light in the optical axis direction of the LED light source.

Preferably, the optical axis reflector has a shape having one or more inclined surfaces having vertexes at one point of the optical axis of the curved mirror.

Here, it is preferable that the optical axis reflector has a conical shape, an other conical shape, or a triangular prism shape.

Preferably, the optical axis reflector is a conical or other conical shape, and the diameter of the conical or other conical circle or the long diameter of the ellipse is smaller than 1/10 of the diameter of the entrance portion of the curved mirror.

Here, when the LED modules are arranged in one to four arrays, the support frame on which the LED modules are mounted may be mounted on the flat support.

Here, when the LED modules are arranged in two to four arrays, the support frame on which the LED modules are mounted may be mounted on an inclined support having at least one inclined surface.

Here, when the LED modules are arranged in four or more arrays, the LED module may be mounted on the optical axis reflector, and the optical axis reflector may serve as a dispersion reflector and a heat dissipation support for the LED module.

Here, the curved mirror may be any one of elliptic spherical, parabolic, concave spherical, and semicircular spherical shapes.

According to the above-described configuration, the present invention can disperse light by indirect illumination of the curved mirror reflector, thereby dramatically reducing the amount of light entering the field of view, thereby minimizing glare.

The present invention places the LED light source near the focus of the curved mirror reflector so that the light is focused to increase the irradiation distance and even the irradiation distribution.

The present invention can be configured so that the LED module installed to irradiate the light to the reflector can be irradiated in a predetermined direction according to predetermined positions and angles.

1 is a schematic view for explaining a light source irradiation direction of a light source and a spherical mirror for using a curved mirror according to the present invention as a reflector.
FIG. 2 is a schematic view for explaining a light source irradiation direction when a curved mirror according to the present invention is used as a reflector and an LED illumination lamp is positioned at a focus of a curved mirror.
FIG. 3 shows shapes of a reflector and an optical axis reflector of a LED lighting lamp using a curved mirror according to the present invention as a reflector.
4 is a view for explaining a structure of an LED module array, a heat dissipation support, and an optical axis reflector using a curved mirror according to the present invention as a reflector.
FIG. 5 is an explanatory view of a light source irradiation direction in a two-row array of LED modules and an optical axis reflector structure using a curved mirror according to the present invention as a reflector.
FIG. 6 is an explanatory diagram of a light source irradiation direction in a four-row array of LED modules and an optical axis reflector structure using a curved mirror according to the present invention as a reflector.

Hereinafter, an LED lighting lamp using a curved mirror according to the present invention as a reflector will be described in detail with reference to the drawings.

The detailed description of the specific embodiments shown in the accompanying drawings is read in conjunction with the accompanying drawings, which are considered a part of the description of the entire invention. The reference to direction or orientation is for convenience of description only and is not intended to limit the scope of the invention in any way.

Specifically, terms indicating positions such as "lower, upper, horizontal, vertical, upper, lower, upper, lower, upper, lower ", or their derivatives (e.g.," horizontally, Etc.) should be understood with reference to both the drawings and the associated description. In particular, such a peer is merely for convenience of description and does not require that the apparatus of the present invention be constructed or operated in a specific direction.

It should also be understood that the term " attached, attached, connected, connected, interconnected ", or the like, refers to a state in which the individual components are directly or indirectly attached, And it should be understood as a term that encompasses not only a movably attached, connected, fixed state but also a non-movable state.

FIG. 1 is a schematic view for explaining a light source direction and a spherical mirror irradiation direction for using a curved mirror according to the present invention as a reflector. FIG. 2 is a schematic view of a curved mirror according to the present invention, Is a schematic view for explaining a light source irradiation direction in a case where the light source is placed in focus.

Referring to FIG. 1, the geometric elements representing the characteristics of the spherical mirror include a centroid, a sphere, an optical axis, a focal point, a radius of curvature, and a focal length.

The centroid (C) is the center of curvature of the spherical surface that forms the mirror surface, and the center of the mirror surface is called the centroid (c). The straight line passing through the center of gravity (c) and the center of gravity (C) is called the central axis.

When considering a hypothetical spherical surface including a mirror surface, the radius of this spherical surface is the radius of curvature (R). Therefore, the distance between the focus and the center of gravity is R / 2, which is called the focal length (f).

In the concave mirror, the focus (F) located in front of the mirror surface is located at the midpoint between the pole and the center of the optical axis, so that when the light incident parallel to the optical axis is reflected, the reflected light passes through the focus. Conversely, the light that enters beyond the focus causes the reflected light to be reflected parallel to the optical axis.

(a) is a curved mirror, (b) is a spherical mirror of a curved mirror, and (c) is a parabolic mirror of a curved mirror. The parabolic mirror of (c) is the same as the curved mirror of (a) and the spherical mirror of (b) has different focus positions. The reason for this is that spherical aberration occurs when chromatic aberration, which is a spherical aberration, occurs at the time of incident of parallel rays, but spherical aberration does not occur in parabolic mirrors.

By applying the principle of the curved mirror, when the LED light source is placed on the curved mirror focus with the LED light source facing the curved mirror surface as shown in FIG. 2, the LED light is scattered and focused efficiently, thereby irradiating the light efficiently. The LED light located near the focus can be reflected by the reflected light in parallel with the optical axis in accordance with the principle of the curved mirror to efficiently illuminate the light.

Conventional LEDs use LED light as a light source or use a part of a reflector, but only a side beam is used for a reflector instead of an LED center beam, so that it is difficult for the light to be radiated uniformly and the center beam is directly irradiated, to be. In order to reduce the glare, dispersion treatment of the LED or the like by a diffusion film or an oil surface treatment causes a decrease in light efficiency.

Accordingly, the present invention improves this point by placing the LED light source in the vicinity of the focus to increase the light irradiation efficiency, and in addition, to construct an optical axis reflector of the curved mirror to distribute and concentrate the light. This is explained below again.

FIG. 3 shows shapes of a reflector and an optical axis reflector of a LED lighting lamp using a curved mirror according to the present invention as a reflector.

Referring to FIG. 3, the LED illumination lamp of the present invention applies a curved mirror as a reflector, and forms an optical axis reflector in the center of the curved mirror to efficiently scatter and focus reflected light.

The shape of the optical axis reflector changes according to the shape of the curved mirror, and examples thereof are shown in Figs. 3 (a) to 3 (c). (a) shows an example in which an elliptic spherical curved mirror 11 and a suitable optical axis reflector 12 are formed, (b) shows a parabolic and concave spherical curved mirror 21 and a corresponding optical axis reflector 22 (C) shows a semi-spherical spherical curved mirror 31 and a corresponding optical axis reflector 32 formed thereon.

The optical axis reflector 12 has a conical shape whose bottom surface is elliptical. The optical axis reflector 22 is conical having a circular bottom face. The optical axis reflector 32 may have a triangular prism shape.

The reason why the optical axis reflectors 12, 22, and 32 are formed is as follows.

When the LED light source passes the curved mirror optical axis, the reflected light is reflected back to the optical axis, so that the optical axis reflector is formed as a sloped surface with a point located at the optical axis of the curved mirror, So that the light source passing through the optical axis is not reflected back to the optical axis.

The distance b from the mirror when f <a <r is r <b <∞, where a = f, b is a parallel ray (distant), and a < When f, b becomes b <0. Therefore, it is preferable that the position of the light source is close to the focus in the center (radius) of the focus or spherical surface.

Also, it is preferable that the diameter of the optical axis reflectors (12, 22, 32) for preventing parallel reflection on the optical axis is smaller than one tenth of the diameter of the spherical mirror wide entrance portion.

4 is a view for explaining a structure of an LED module array, a heat dissipation support, and an optical axis reflector using a curved mirror according to the present invention as a reflector.

One of the additional considerations in the LED lighting design of the present invention is the number of LEDs and the arrangement relationship.

LED Beam Angle is 20 ° ~ 140 °, so you should choose the LED for your application. For example, a spotlight type should use a narrow LED beam width because it should concentrate light on a narrow area, and a wide LED beam width should be selected for general illumination. In addition, in the case of a streetlight, a vehicle headlight, and a searchlight, the size of the curved mirror is different, and the LED quantity to be mounted differs according to the LED output to be used in the LED module configuration.

The LED module determines the number of LED elements and heat that can be mounted according to the mountable size of the curved mirror. The radius of the semicircular spherical curved mirror is determined according to the length of the semicircular spherical surface.

The higher the light output, the higher the value, and the higher the light emitting efficiency, the lower the heat output. Therefore, when considering the price of LED modules, the number of LEDs will be selectively changed.

The LED illumination lamp of the present invention is an almost parallel ray and a diffused ray because the LED module is in focus.

Diffusion in the direction of the central axis of the mirror between the focus and the center of the mirror (O) increases as the distance from the focus increases, and the diffusion decreases as the center approaches the center. As the diffusion increases from the focus to the center of the mirror (M), the diffusion increases toward the outside of the center of the mirror, and the diffusion decreases as the center of the mirror becomes closer to the center (M).

Considering the above circumstances, a plurality of LEDs may be mounted on one row of LEDs, and a plurality of LEDs may be arranged from one array.

In particular, a plurality of LEDs are mounted on a heat-dissipating support, and the structure of the heat-dissipating support may vary depending on the required luminous efficiency, LED orientation angle, and number of arrays.

4A shows an example in which a plurality of LEDs are arranged in a row array from a single column to a four-column array, and the plate-like heat radiation support 44 is used. The LEDs can be modularized into the flat plate type heat dissipation support base 44. [

(a) to (d) illustrate examples in which a plurality of LEDs are arranged in one to four LEDs, respectively.

The LED module arranged on the flat heat-dissipating base 44 has the optical axis reflector 42, which is an inclined plane located at a position near the focus of the curved mirror and has a vertex at one point of the optical axis at a position facing the light source, .

4 (B) illustrates a support structure that can be applied to a case where a plurality of LEDs are arranged in two to four arrangements, and shows an inclined support.

(A) shows a case where the LED array is a two-column arrangement, (b) shows a case where the LED arrangement is a three-column arrangement, and (c) shows a case where the LED arrangement is a four-column arrangement. That is, (a) is a two-plane inclination support 54a structure in which two inclined planes face downward, (b) is a structure of a triaxial inclination support 54b in a case where the LED directing angle is 120 degrees or less, Shows the structure of the tetrahedron inclined support 54c when the LED directing angle is 90 degrees or less.

(b) and (c) may have LEDs on each side, and a plurality of inclined supports 54b and 54c may form an array of LED modules in the form of a regular triangle or a tetrahedron.

(d) is a schematic representation of the arrangement position of the inclination support, the LED module and the optical axis reflector.

4C shows a structure in which the LED 63 is mounted on the optical axis reflector 62 as an example of a case in which the arrangements as shown in FIGS.

At this time, the shape of the optical axis reflector 62 may have a shape as shown in (a) to (c).

FIG. 5 is an explanatory diagram of a light source irradiation direction in a two-row array of LED modules and an optical axis reflector structure of a LED lighting lamp using a curved mirror according to the present invention as a reflector. FIG. 6 is a cross- Fig. 5 is an explanatory diagram of a light source irradiation direction in a four-row array of LED modules and an optical axis reflector structure. Fig.

5A is a structure and a positional view of a two-plane inclination support 54a and an optical axis reflector 52. FIG. 5B is a sectional view of the optical axis reflector 52 when a light source is arranged as shown in FIG. 5A. And the direction of the reflected light is described.

In the principle of the concave mirror, light incident parallel to the optical axis OM is reflected from the mirror and passes through the focus F. [ Therefore, the reflected light strikes the LED module located at the focus.

Light directed toward the center of the mirror is reflected symmetrically on the optical axis OM. That is, the angle of incidence ∠PMO and the angle of reflection ∠QMO are the same. Therefore, the reflected light strikes the LED module located at the focus.

Therefore, in order to prevent the reflected light from hitting the LED module located near the focus, a conical optical axis reflector with MN + as the radius of the bottom surface is required at the mirror center M of the optical axis OM.

In this case, O denotes the center of gravity, F denotes the focal point, P denotes the light source, M denotes the center of the mirror, and N denotes a point of contact with the mirror surface when incident from the light source in parallel with the optical axis.

6A shows a case in which the curved mirror 61 and the optical axis reflector 62 and the LED 63 are mounted on the optical axis reflector 62, ) Mounting structure, and (B) is a schematic view of the incidence direction and the reflection direction of the light source at that time.

It can be seen that the LED module of the optical axis reflector 62 (which also serves as the heat dissipating support of the LED module) is located near the focus as shown in FIG. 5B, and the reflected light is a light beam that is diffused as almost parallel rays.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications and variations are possible within the scope of the claims and the claims.

It is evident, however, that such simple modifications and variations are not to be regarded as a departure from the scope of the present invention.

11, 21, 31, 41, 51, 61: curved mirror
12, 22, 32, 42, 52, 62:
44, 54: inclined support

Claims (8)

The curved mirror is used as a reflector,
An LED light source is disposed near the focus of the curved mirror,
And an optical axis reflector for dispersing the reflected light of the LED light source in the optical axis direction is formed in the center of the inner side surface of the curved mirror, wherein the curved mirror is used as a reflector. The method according to claim 1,
Wherein the optical axis reflector has a shape having at least one inclined surface having a vertex at one point of the optical axis of the curved mirror, wherein the curved mirror is used as a reflector. The method according to claim 1,
The optical axis reflector is a cone, a cone, or a triangular prism, and the LED illuminator uses a curved mirror as a reflector. The method according to claim 1,
The optical axis reflector may be conical or other conical,
Wherein the diameter of the cone or cone-shaped circle or the long diameter of the ellipse is smaller than one-tenth of the diameter of the entrance portion of the curved mirror, wherein the curved mirror is used as a reflector. The method according to claim 1,
In the case where the LED modules are arranged in one to four arrays, the support frame on which the LED modules are mounted is mounted on a flat support. LED lights using a curved mirror as a reflector. The method according to claim 1,
In the case where the LED modules are arranged in two to four arrays, the support frame on which the LED modules are mounted is mounted on an inclined support having at least one inclined surface. The method according to claim 1,
When the LED module is arranged in four or more arrays, the LED module is mounted on the optical axis reflector, and the optical axis reflector serves also as a dispersion reflector and a heat dissipation support part of the LED module. The method according to claim 1,
The curved mirror may be an elliptic spherical, parabolic, concave spherical, or semicircular spherical type LED light using a curved mirror as a reflector.

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