KR20150041692A - Reflective diffusion lens and lighting installation - Google Patents

Abstract

The present invention relates to a reflective diffusion lens and a lighting device. The present invention includes: a bottom surface which includes a concave surface which is recessed in the direction of a reflective surface and guides light emitted to the concave surface to the reflective surface; a reflective surface which faces the bottom surface and allows the concave surface formed in the direction of the bottom surface to totally reflect light emitted to the bottom surface; and a lateral surface which connects the bottom surface and the reflective surface. The diameter of the reflective surface is smaller than or equal to that of the bottom surface.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a reflection type diffusing lens,

To a reflection type diffusion lens and a lighting apparatus.

A backlight unit is used for an LCD display. The backlight unit may include a light guide plate (light guide plate) type and a direct lower type.

At this time, the light guide plate may be a plastic molded lens serving to uniformly illuminate light emitted from the cold cathode fluorescent lamp (CCFL) to the entire surface of the LCD.

When a light guide plate is adopted, a surface light source having a size of 1 m 2 or more can be manufactured to a thickness of 10 mm or less, and luminance uniformity can be made 80% or more.

However, as the size of the light guiding plate increases, the processing yield decreases, the processing cost increases, and the light efficiency decreases.

In recent years, the backlight unit for an LCD display has been applied to a direct type rather than a light guide plate type. In direct lighting type, the light efficiency is 1.5 to 2 times higher than that of the light guide plate type, The manufacturing cost can be reduced.

One aspect of the reflection type diffusion lens and the illumination device is to provide a reflection type diffusion lens and a lighting device for eliminating the optical interference phenomenon between the lenses while maintaining the light diffusion property.

According to an aspect of the present invention, there is provided a reflection type diffusion lens comprising: a bottom surface including a concave surface concavely formed in a reflective surface direction so that light incident on the concave surface is incident on a reflective surface;

A concave surface formed to be concave in the direction of the bottom surface to face the bottom surface, the reflecting surface being formed to totally reflect light incident from the bottom surface; And

And a side surface formed to connect the bottom surface and the reflective surface, wherein a surface irregularity is formed partially or entirely on the bottom surface, or surface irregularities are formed partially or entirely on the side surface.

Further, the diameter of the reflecting surface may be smaller than or equal to the diameter of the bottom surface.

In addition, the concave surface of the bottom surface may include a section having a parabolic shape or a normal distribution profile in its longitudinal section, a section having a height equal to a height between neighboring points, and a section having an inflection point.

In addition, the concave surface of the bottom surface may be formed in a parabolic shape or a regular distribution shape in its longitudinal section, but may have surface irregularities.

In addition, the surface irregularities may be formed such that a geometric shape including a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid is recessed toward the reflection surface, or protruded in a direction opposite to the reflection surface.

In addition, the surface irregularities can be processed through at least one of the following methods: sand blasting, etching, collision of fine particles, chemical corrosion, and friction with a surface irregular surface have.

Also, the side surface may be a mirror surface.

In addition, the side surface may have a pattern formed on the entire surface or a part thereof on the mirror finished surface.

The pattern formed on the side surface may be formed such that a geometric shape including a step shape, a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid protrudes or sinks.

The pattern formed on the side surface may be processed by at least one of the following methods: sandblasting, etching, collision of fine particles, chemical etching, and rubbing with a surface irregular surface .

The concave surface of the bottom surface may have a curvature to condense the light emitted from the light source so that the light can be irradiated onto the reflection surface.

The concave surface of the reflecting surface may have a curvature that causes total reflection or refraction of light irradiated from the light source within a range of 20 degrees with respect to the central axis of the reflection type diffusing lens, May have a curvature that totally reflects light to be irradiated in a range of 20 to 60 degrees.

The concave surface of the bottom surface or the concave surface of the reflection surface may have a parabolic shape or a normal distribution shape in the longitudinal section, and the parabolic shape or the normal distribution shape may be a single curve inclined to the central axis of the reflection- A plurality of curved lines inclined to the central axis, a plurality of straight lines inclined to the central axis, and a curved line inclined to the central axis and a shape formed of a straight line.

The depth of the concave surface of the reflecting surface may be formed deeper than the depth of the concave surface of the bottom surface with respect to the central axis of the reflecting diffusion lens.

Further, each of the bottom surface and the reflection surface may have a symmetrical structure with respect to the central axis of the reflection type diffusion lens.

In addition, the symmetrical structure of the reflective diffusion lens on the central axis may have a rotationally symmetric structure.

The relationship between the diameter Dia_L of the reflection type diffusing lens and the height H_L of the reflection type diffusing lens is Dia_L > = < EMI ID = 2 * [Dis (Light_Lens) * tan60 + H_L * tan (asin ((sin60 * n_s) / n_L))].

According to another aspect of the disclosed invention, an illumination device includes at least one light source for emitting light; A reflection type diffusing lens positioned above the light source for diffusing light emitted from the light source; And a reflection plate disposed under the light source and adjusting a direction or a light amount of a light ray reaching the light source, wherein the reflection type diffusion lens includes a concave surface formed concavely in the reflective surface direction, A concave surface formed so as to be concave in the direction of the bottom surface, and a reflecting surface formed to totally reflect light incident from the bottom surface; And a surface irregularity may be formed on a part or the whole surface of the bottom surface, or surface irregularities may be formed on a part or the entire surface of the side surface.

Further, the diameter of the reflecting surface may be smaller than or equal to the diameter of the bottom surface.

In addition, the concave surface of the bottom surface may include a section having a parabolic shape or a normal distribution profile in its longitudinal section, a section having a height equal to a height between neighboring points, and a section having an inflection point.

In addition, the concave surface of the bottom surface may be formed in a parabolic shape or a regular distribution shape in its longitudinal section, but may have surface irregularities.

In addition, the surface irregularities may be formed such that a geometric shape including a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid is recessed toward the reflection surface, or protruded in a direction opposite to the reflection surface.

In addition, the surface irregularities can be processed through at least one of the following methods: sand blasting, etching, collision of fine particles, chemical corrosion, and friction with a surface irregular surface have.

Also, the side surface may be a mirror surface.

In addition, the side surface may have a pattern formed on the entire surface or a part thereof on the mirror finished surface.

The pattern formed on the side surface may be formed such that a geometric shape including a step shape, a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid protrudes or sinks.

The pattern formed on the side surface may be processed by at least one of the following methods: sandblasting, etching, collision of fine particles, chemical etching, and rubbing with a surface irregular surface .

The concave surface of the bottom surface may have a curvature to condense the light emitted from the light source so that the light can be irradiated onto the reflection surface.

The concave surface of the reflecting surface may have a curvature that causes total reflection or refraction of light irradiated from the light source within a range of 20 degrees with respect to the central axis of the reflection type diffusing lens, May have a curvature that totally reflects light to be irradiated in a range of 20 to 60 degrees.

The concave surface of the bottom surface or the concave surface of the reflection surface may have a parabolic shape or a normal distribution shape in the longitudinal section, and the parabolic shape or the normal distribution shape may be a single curve inclined to the central axis of the reflection- A plurality of curved lines inclined to the central axis, a plurality of straight lines inclined to the central axis, and a curved line inclined to the central axis and a shape formed of a straight line.

The depth of the concave surface of the reflecting surface may be formed deeper than the depth of the concave surface of the bottom surface with respect to the central axis of the reflecting diffusion lens.

Further, each of the bottom surface and the reflection surface may have a symmetrical structure with respect to the central axis of the reflection type diffusion lens.

In addition, the symmetrical structure of the reflective diffusion lens on the central axis may have a rotationally symmetric structure.

The relationship between the diameter Dia_L of the reflection type diffusing lens and the height H_L of the reflection type diffusing lens is Dia_L > = < EMI ID = 2 * [Dis (Light_Lens) * tan60 + H_L * tan (asin ((sin60 * n_s) / n_L))].

In addition, the light source may include a light emitting diode (LED).

The diffusing plate may further include a diffuser disposed on the reflective diffusion lens to adjust the direction or amount of light.

According to one aspect of the reflection type diffusing lens and the illumination device, since the surface treatment is applied to the reflection type diffusion lens, the inter-lens light generated when the light diffusibility of the lens is increased in the direct- The effect of reducing the interference phenomenon and improving the light uniformity and reducing the visibility defect can be expected.

Further, since the structure for preventing the optical interference phenomenon is designed in advance in the design of the reflection type diffusion lens, it is possible to shorten the period and cost required for lens development.

1 is a perspective view of a reflection type diffusion lens.
2 is a view showing an embodiment of a longitudinal section of a reflection type diffusion lens.
3 is a view showing another embodiment of the longitudinal section of the reflection type diffusion lens.
4 is a view showing an embodiment in which concave and convex portions are formed on a bottom surface of a reflection type diffusion lens.
5 is a view showing another embodiment in which concave and convex portions are formed on the bottom surface of the reflection type diffusion lens.
Figs. 6 to 8 are views showing areas where concave and convex portions are formed in the bottom surface of the reflection type diffusion lens. Fig.
9 is a view showing an embodiment in which a pattern is formed on a side surface of a reflection type diffusion lens.
10 is a view showing another embodiment in which a pattern is formed on the side surface of the reflection type diffusion lens.
11 is a view showing depths of grooves formed on the bottom surface and the reflection surface of the reflection type diffusion lens.
12 is a view for explaining the angle of incidence of the light source of the reflection type diffusion lens.
13 is a diagram showing the structure of a reflection type diffusion lens for explaining the relationship between the height and the diameter of the reflection type diffusion lens when light is totally reflected on the reflection surface.
14 is a view showing a structure in which a projection is formed on a reflection type diffusion lens.
15 is a diagram showing a configuration of a lighting apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. In this specification, the terms first, second, etc. are used to distinguish one element from another, and the element is not limited by the terms.

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

FIG. 1 is a perspective view of a reflection type diffusion lens, FIG. 2 is a view showing an embodiment of a longitudinal section of a reflection type diffusion lens, and FIG. 3 is a view showing another embodiment of a longitudinal section of a reflection type diffusion lens.

1 to 3, the reflection type diffusion lens 100 is formed by cutting out the upper part of the conical shape, and a groove 10 is formed in the central part of the reflection surface 130 and the bottom surface 110 . The longitudinal axis of the reflective diffusion lens 100 may have a trapezoidal shape, and the left lens portion and the right lens portion may have a symmetrical structure with respect to the center axis I. Thus, each of the bottom surface 110 and the reflecting surface 130 may have a symmetrical structure with respect to the central axis I of the reflective diffusion lens 100. At this time, the symmetrical structure on the center axis I of the reflection type diffusion lens 100 may have a rotationally symmetric structure.

The reflective diffusion lens 100 includes a concave surface 101 formed concavely in the reflective surface direction and is formed on the bottom surface of the reflective surface 130 so that light incident on the concave surface 101 is incident on the reflective surface 130. [ A concave surface 103 formed to be concave in the direction of the bottom surface facing the surface 110 and the bottom surface 110 includes a reflecting surface 130 formed to totally reflect light incident from the bottom surface 110, And a side surface 120 formed to connect the reflective surface 110 and the reflective surface 130 with each other. At this time, surface irregularities may be formed partially or entirely on the bottom surface 130, or surface irregularities may be formed partially or entirely on the side surface 120. At this time, the surface irregularities are for preventing the occurrence of interference light by inducing the angle change, the path change, or the scattering of the light rays. The surface irregularities are not limited to the bottom surface 110 and the side surface 120 but may be formed in any region where interference light is generated between the reflection type diffusion lenses. The diameter of the reflective surface 130 may be less than or equal to the diameter of the bottom surface 110.

As shown in FIG. 2, the concave surface 101 of the bottom surface 110 may include a section having a parabolic shape or a regular distribution shape in its longitudinal section, in which the height between neighboring points is the same and the inflection point exists . For example, the concave surface 101 of the bottom surface 110 has a parabolic shape or a shape similar to a normal distribution, and in some areas, a flat section (a section perpendicular to the central axis I of the reflective diffusion lens 100) And the inflection points where the sign of the slope changes or the slope changes discontinuously. That is, the concave surface 101 of the bottom surface 110 can be formed in a stepwise shape along the parabolic or normal distribution shape as a whole.

The reason why the shape of the concave surface 101 of the bottom surface 110 is formed as a curved surface of a parabolic shape or a normal distribution shape is to collect light so as to minimize the radius at which the total reflection occurs in the reflecting surface 130, The reason why the concave surface 103 of the reflecting surface 130 is formed as a curved surface of a parabolic or normal distribution shape is that it is easy to adjust the angle at which the light reflected by the reflecting surface 130 spreads to the side surface of the lens.

As shown in FIG. 3, the concave surface 101 of the bottom surface 110 is formed in a parabolic shape or a regular distribution shape in its longitudinal section, and surface irregularities may be formed. At this time, the surface irregularities may be formed such that a geometric shape including a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid is recessed toward the reflection surface or protruded in a direction opposite to the reflection surface. Also, the surface irregularities can be processed through at least one of the following methods: sandblasting, etching of fine particles including etching, chemical etching, and friction with a surface irregularities.

The concave surface 101 of the bottom surface 110 or the concave surface 103 of the reflecting surface 130 may have a parabolic shape or a normal distribution shape in its longitudinal section. Although not shown, a parabolic shape or a normal distribution shape is formed by a single curved line inclined to the central axis I of the reflective diffusion lens 100, a plurality of curved lines inclined to the central axis, a plurality of straight lines inclined to the central axis, A shape inclined by an axis and a shape formed by a straight line.

The concave surface 101 of the bottom surface 110 described above may be formed over the entire surface of the bottom surface 110 or may be formed in a part of the area and corresponds to the concave surface 103 of the reflecting surface 130 . That is, the entire bottom surface 110 may be the concave surface 101 or not.

5 is a view showing another embodiment in which concave and convex portions are formed on the bottom surface of the reflection type diffusing lens, and FIGS. 6 to 8 are cross- FIG. 7 is a view showing a region where concave and convex portions are formed in the bottom surface of the reflection type diffusion lens. FIG.

As shown in Figs. 4 and 5, the bottom surface 110 of the reflection type diffusing lens 100 may have surface irregularities formed on a part or whole surface (not shown). At this time, the surface irregularities are formed such that a geometric shape including a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid is recessed in the direction of the reflection surface (see 112 in FIG. 5) or protruded in a direction opposite to the reflection surface 111 "). Also, the surface irregularities can be processed through at least one of the following methods: sandblasting, etching of fine particles including etching, chemical etching, and friction with a surface irregularities.

6 to 8, the surface irregularities formed on the bottom surface 110 of the reflection type diffusing lens 100 are formed on the edge 110 of the bottom surface 110 (refer to 113 in FIG. 6) (See FIG. 8), or may be formed on the entire surface (115 in FIG. 8), but is not limited thereto.

FIG. 9 is a view showing an embodiment in which a pattern is formed on a side surface of a reflection type diffusion lens, and FIG. 10 is a view showing another embodiment in which a pattern is formed on a side surface of a reflection type diffusion lens.

As shown in Figs. 9 and 10, the side surface 120 of the reflection type diffusing lens 100 may be a mirror surface. In this case, the mirror surface means that the surface roughness is a mirror surface. For example, the surface roughness may be 80 nm or less, but is not limited thereto.

As shown in Figs. 9 and 10, the side surface 120 of the reflection type diffusing lens 100 can be formed in a front surface (not shown) or a part (Figs. 9 and 10) have. At this time, the pattern may be formed 121 in the longitudinal direction of the reflection type diffusion lens 100, or may be formed 123 in the height direction of the reflection type diffusion lens 100, but not limited thereto, As shown in FIG. That is, as shown in Figs. 9 and 10, the surface irregularities can be formed in a pattern in which grooves are formed in the side surface 120. Fig.

In addition, the pattern formed on the side surface 120 may be formed such that a geometric shape including a stepped shape, a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid protrudes or sinks. In addition, the pattern formed on the side surface 120 may be formed by at least one of the following methods: sand blasting, etching, collision of fine particles, chemical corrosion, and friction with a surface irregular surface Can be processed.

11 is a view showing depths of grooves formed on the bottom surface and the reflection surface of the reflection type diffusion lens.

11, the reflection type diffusion lens 100 has a depth (Dep_top) of the concave surface 103 of the reflection surface 130 with respect to the central axis (I in Fig. 2) of the reflection type diffusion lens 100, May be formed deeper than the depth (Dep_bot) of the concave surface 101 of the bottom surface 110. That is, the depth of the concave surface 103 of the reflecting surface 130 (the depth of the groove formed in the reflecting surface) is greater than the depth of the concave surface 101 of the bottom surface 110 The depth of the groove formed in the recessed portion). The above-described structure is intended to cause effective total reflection at the reflective surface 130 to occur.

12 is a view for explaining the angle of incidence of the light source of the reflection type diffusion lens.

12, the concave surface 101 of the bottom surface 110 of the reflection type diffusing lens 100 is configured to condense the light emitted from the light source 200 so that the curvature Lt; / RTI >

12, the concave surface 101 of the bottom surface 110 of the reflection-type diffusion lens 100 is inclined with respect to the center axis I of the reflection-type diffusion lens 100 from the light source 200 A curvature for total reflection or refraction of light to be irradiated within a range of 20 to 20 degrees or a curvature for totally reflecting light emitted from the light source 200 in a range of 20 to 60 degrees with respect to the central axis of the reflection type diffusion lens 100 And the like.

This is because the light rays originating from the light source 200 existing on the optical axis among the lower part of the reflection diffusion lens 100 are incident on the bottom surface 110 and refracted, Is incident on the lens, and the total reflection is performed on the reflection surface 130 of the lens, and then the light travels to the lens side 120. When the angle formed by the light beam originating from the light source 200 and the optical axis is within 20 degrees, total reflection is performed on the lens reflection surface 130, or refraction and reflection are partially or completely performed on the lens reflection surface 130 It also reflects the characteristics that can be achieved.

13 is a diagram showing the structure of a reflection type diffusion lens for explaining the relationship between the height and the diameter of the reflection type diffusion lens when light is totally reflected on the reflection surface.

13, the height of the reflection type diffusion lens 100 can be defined as H_L, which is the distance from the reflection surface 130 to the floor surface 110. [ The distance between the reflective surface 130 and the bottom surface 110 may be a distance measured based on a distance parallel to the central axis I of the reflective diffusion lens 100. The distance between the light source 200 and the bottom surface 110 of the reflective diffusion lens 100 can be defined as Dis (Light_Lens).

The diameter of the reflection type diffusion lens 100 can be defined as Dia_L with respect to a plane having a larger diameter among the reflection surface 130 and the bottom surface 110 as a reference.

The incident angle from the light source (200 in FIG. 12) to the central axis I of the reflective diffusion lens 100 is .theta.1, the incident angle of the light incident on the bottom surface 110 of the reflective diffusion lens 100 is .theta.1, The angle of refraction which is the angle formed by the light refracted by the light source 100 with the normal line can be defined as? 2.

The distance from the center axis of the reflection type diffusing lens 100 to the point where the light enters the bottom surface 110 is x1 in the longitudinal direction of the reflection type diffusing lens 100, The distance in the longitudinal direction of the reflection type diffusion lens 100 from the point of incidence on the plane 130 to the point of incidence on the reflection plane 130 can be defined as x2.

Through the above definition, the relationship between the diameter Dia_L of the lens and the height H_L of the lens can be expressed by Equation (1) or (2).

If the medium around the reflection type diffusion lens 100 is air, n_S is 1. Therefore, it can be expressed more simply as shown in Equation (3).

That is, when the height and the diameter of the reflection type diffusion lens 100 are made to satisfy the above formula, the light can be totally reflected on the reflection surface 130.

14 is a view showing a structure in which a projection is formed on a reflection type diffusion lens.

As shown in FIG. 14, the reflection type diffusion lens 100 may include a projection 140 on the bottom surface 110. At this time, the protrusion 140 is located in a flat section where the optical path of the bottom surface 110 of the reflective diffusion lens 100 is minimized, and a printed circuit board or a reflector 300, As shown in FIG.

Fig. 15 is a diagram showing the configuration of the illumination device, and will be described with reference to Figs. 1 to 14 described above.

15, the illumination device 500 may include a light source 200, a reflection type diffusion lens 100, a reflection plate 300, and a diffusion plate 400. At this time, the reflection type diffusing lens 100 is the same as the description of FIGS. 1 to 14, and thus the detailed description thereof will be omitted.

In more detail, the reflection type diffusion lens 100 may be disposed on the reflection plate 300 or the printed circuit board. The reflective diffusion lens 100 includes a concave surface 101 formed concavely in a reflective surface direction and includes a bottom surface 110 formed so that light incident on the concave surface 101 is incident on the reflective surface 130, A concave surface 103 which is positioned to face the bottom surface 110 and is recessed in the bottom surface direction includes a reflecting surface 130 and a bottom surface 110 formed to totally reflect light incident from the bottom surface 110, And a side surface 120 formed to connect the reflecting surface 130. At this time, surface irregularities may be formed partially or entirely on the bottom surface 110, or surface irregularities may be formed partially or entirely on the side surface 120.

1 and 2, the reflection type diffusion lens 100 has a shape in which the upper part of the conical shape is cut out, and a groove 10 is formed in the central part of the reflection surface 130 and the bottom surface 110 . The longitudinal axis of the reflective diffusion lens 100 may have a trapezoidal shape, and the left lens portion and the right lens portion may have a symmetrical structure with respect to the center axis I. Thus, each of the bottom surface 110 and the reflecting surface 130 may have a symmetrical structure with respect to the central axis I of the reflective diffusion lens 100.

As shown in FIG. 3, the concave surface 101 of the bottom surface 110 is formed in a parabolic shape or a regular distribution shape in its longitudinal section, and surface irregularities may be formed.

The concave surface 101 of the bottom surface 110 or the concave surface 103 of the reflecting surface 130 may have a parabolic shape or a normal distribution shape in its longitudinal section. Although not shown, a parabolic shape or a normal distribution shape may be formed by a single curved line inclined to the central axis of the reflective diffusion lens, a plurality of curved lines inclined to the central axis, a plurality of straight lines inclined to the central axis, And a straight line shape.

The light source 200 may be configured to emit light, and may be one or more. The light source 200 is disposed between the reflection plate 300 and the printed circuit board (not shown) and the reflection type diffusion lens 100 and is disposed on the bottom surface 110 of the reflection type diffusion lens 100. [ It can be located in a concave groove. At this time, the light source 200 may be disposed in a region adjacent to the central axis I of the reflection-type diffusion lens 100, or may be disposed in more than one region. The light source may include an LED (Light Emitting Semiconductor).

The reflector 300 is positioned at a lower portion of the light source 200 and can adjust the direction or amount of light to reach. The width of the reflector 300 may be determined considering that it may include one or more reflective diffuser lenses 100 depending on the desired brightness. That is, the reflection type diffusion lens 100 is located above the light source 200 and diffuses light emitted from the light source 200. At this time, the reflection plate 300 may include a structure (not shown) for fixing the reflection type diffusion lens 100 and the light source 200. The reflection plate 300 may have a reflectance of 30% or more.

The diffusion plate 400 may be disposed on the reflective diffusion lens 100 to adjust the direction or amount of light. At this time, the diffusion plate 400 can protect the reflection diffusion lens 100, the light source 200, and the reflection plate 300 from external stimuli. As shown in FIG. 15, the diffuser plate 400 may be positioned above the reflective diffuser lens 100, but may be spaced apart. The diffusion plate 400 may have a transmittance of 10% or more.

The above-described lighting apparatus 500 can be applied to a thin type lighting apparatus, for example, a back light unit for an LCD display, a lighting apparatus for household appliances, an industrial lighting apparatus, a building lighting apparatus, a portable lighting apparatus, , But is not limited thereto.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: home
100: Reflective diffusion lens
101: concave surface of bottom surface
103: concave surface of reflecting surface
110: bottom surface
120: side
130: Reflecting surface
140: projection
200: Light source
300: reflector
400: diffusion plate
500: Lighting device

Claims (36)

A bottom surface including a concave surface concavely formed in the reflective surface direction, the light incident on the concave surface being incident on the reflective surface;
A concave surface formed to be concave in the direction of the bottom surface to face the bottom surface, the reflecting surface being formed to totally reflect light incident from the bottom surface; And
A side surface formed to connect the bottom surface and the reflective surface;
Wherein a surface irregularity is formed partially or entirely on the bottom surface, or surface irregularities are formed on a part or the entire surface of the side surface.
The method according to claim 1,
And the diameter of the reflecting surface is smaller than or equal to the diameter of the bottom surface.
The method according to claim 1,
The concave surface of the bottom surface
And a section where the vertical cross-section has a parabolic shape or a normal distribution shape, and the height between adjacent points is the same and the inflection point exists.
The method according to claim 1,
The concave surface of the bottom surface
A reflection type diffusing lens in which a longitudinal section is formed in a parabolic shape or a normal distribution shape, and surface irregularities are formed.
The method according to claim 1 or 4,
In the surface irregularities,
Wherein a geometric shape including a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid is formed to be recessed in the direction of the reflection surface, or is formed so as to protrude in a direction opposite to the reflection surface.
The method according to claim 1 or 4,
In the surface irregularities,
A reflection type diffusion lens processed through at least one of the following methods: sand blasting, etching of fine particles including etching, chemical etching, and friction between a surface and an uneven surface.
The method according to claim 1,
Wherein the side surface is a mirror surface.
The method according to claim 1,
Wherein the side surface is a mirror-finished surface, and a pattern is formed on the front surface or a part of the surface.
The method of claim 8,
Wherein the pattern formed on the side surface comprises:
A reflection type diffusion lens in which a geometric shape including a step shape, a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid protrudes or sinks.
The method of claim 8,
Wherein the pattern formed on the side surface comprises:
A reflection type diffusion lens processed through at least one of the following methods: sand blasting, etching of fine particles including etching, chemical etching, and friction between a surface and an uneven surface.
The method according to claim 1,
The concave surface of the bottom surface
Wherein the diffusing lens has a curvature that converges the light emitted from the light source so that the light can be irradiated onto the reflection surface.
The method according to claim 1,
Wherein the concave surface of the reflecting surface
Has a curvature that causes total reflection or refraction of light irradiated from the light source within a range of 20 degrees with respect to the central axis of the reflection type diffusion lens,
A reflection type diffusion lens having a curvature that totally reflects light emitted from a light source in a range of 20 degrees to 60 degrees with respect to a central axis of a reflection type diffusion lens.
The method according to claim 1,
Wherein the concave surface of the bottom surface or the concave surface of the reflection surface has a parabolic shape or a normal distribution shape in its longitudinal section,
The parabolic shape or the normal distribution shape may be,
A reflection type diffusion comprising a single curved line inclined to the central axis of the reflection type diffusing lens, a plurality of curved lines inclined to the central axis, a plurality of straight lines inclined to the central axis, and a curved line inclined to the central axis, lens.
The method according to claim 1,
Wherein the depth of the concave surface of the reflective surface is formed to be deeper than the depth of the concave surface of the bottom surface with respect to the central axis of the reflective diffusion lens.
The method according to claim 1,
Wherein each of the bottom surface and the reflection surface has a symmetrical structure with respect to a center axis of the reflection type diffusion lens.
16. The method of claim 15,
Wherein the reflection type diffusing lens has a rotationally symmetric structure with a symmetrical structure with respect to the center axis of the reflection type diffusing lens.
The method according to claim 1,
The relationship between the diameter Dia_L of the reflection type diffusing lens and the height H_L of the reflection type diffusing lens is Dia_L > = 2 * [Dis (Light_Lens) * tan60 + H_L * tan (asin ((sin60 * n_s) / n_L))].
At least one light source for emitting light;
A reflection type diffusing lens positioned above the light source for diffusing light emitted from the light source; And
And a reflection plate disposed under the light source and adjusting a direction or a light amount of a light ray reaching the light source,
Wherein the reflective diffusion lens includes a concave surface formed concavely in a reflective surface direction, the bottom surface being formed such that light incident on the concave surface is incident on the reflective surface, A concave surface formed concavely has a reflective surface formed to totally reflect light incident from the bottom surface and a side surface formed to connect the bottom surface and the reflective surface, and a surface irregularity is formed partially or entirely on the bottom surface , Or surface irregularities are formed on a part or the entire surface of the side surface.
19. The method of claim 18,
And the diameter of the reflecting surface is smaller than or equal to the diameter of the bottom surface.
19. The method of claim 18,
The concave surface of the bottom surface
Wherein the vertical plane has a parabolic shape or a normal distribution shape, and the height between neighboring points is the same or an inflection point section exists.
19. The method of claim 18,
The concave surface of the bottom surface
Wherein the longitudinal section is formed in a parabolic shape or a regular distribution shape, and surface irregularities are formed.
The method according to claim 18 or 21,
In the surface irregularities,
Wherein a geometric shape including a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid is formed to be recessed in the direction of the reflection surface, or is formed so as to protrude in a direction opposite to the reflection surface.
The method according to claim 18 or 21,
In the surface irregularities,
Wherein at least one of the following methods is employed: at least one of a sandblasting, a collision method of fine particles including etching, a chemical erosion method, and a friction method with a surface irregularities.
19. The method of claim 18,
Wherein the side surface is a mirror surface.
19. The method of claim 18,
Wherein the side surface has a pattern formed on a front surface or a part thereof on a mirror finished surface.
26. The method of claim 25,
Wherein the pattern formed on the side surface comprises:
Wherein the geometric shape including a step shape, a hemisphere, a cylinder, a polygonal column, a cone, and a polygonal pyramid protrudes or sinks.
26. The method of claim 25,
Wherein the pattern formed on the side surface comprises:
Wherein at least one of the following methods is employed: at least one of a sandblasting, a collision method of fine particles including etching, a chemical erosion method, and a friction method with a surface irregularities.
19. The method of claim 18,
The concave surface of the bottom surface
And has a curvature to condense the light emitted from the light source so that the light can be irradiated onto the reflection surface.
19. The method of claim 18,
Wherein the concave surface of the reflecting surface
Has a curvature that causes total reflection or refraction of light irradiated from the light source within a range of 20 degrees with respect to the central axis of the reflection type diffusion lens,
And has a curvature that totally reflects light emitted from a light source in a range of 20 degrees to 60 degrees with respect to the central axis of the reflection type diffusion lens.
19. The method of claim 18,
Wherein the concave surface of the bottom surface or the concave surface of the reflection surface has a parabolic shape or a normal distribution shape in its longitudinal section,
The parabolic shape or the normal distribution shape may be,
Wherein the light emitting device comprises a single curved line inclined to the central axis, a plurality of curved lines inclined to the central axis, a plurality of straight lines inclined to the central axis, and a curved line inclined to the central axis and a straight line shape.
19. The method of claim 18,
The depth of the concave surface of the reflecting surface is formed deeper than the depth of the concave surface of the bottom surface with respect to the center axis of the reflecting diffusion lens.
19. The method of claim 18,
Wherein each of the bottom surface and the reflection surface has a symmetrical structure with respect to a center axis of the reflection type diffusion lens.
33. The method of claim 32,
Wherein the symmetrical structure on the central axis has a rotationally symmetric structure.
19. The method of claim 18,
The relationship between the diameter Dia_L of the reflection type diffusing lens and the height H_L of the reflection type diffusing lens is Dia_L > = 2 * [Dis (Light_Lens) * tan60 + H_L * tan (asin ((sin60 * n_s) / n_L))].
19. The method of claim 18,
Wherein the light source comprises an LED (Light Emitting Semiconductor).
19. The method of claim 18,
A diffusion plate disposed on the reflective diffusion lens to adjust the direction or amount of light;
Further comprising:

Images