KR20180004439A - Optical lens, light uint and lighting apparatus having thereof - Google Patents

Abstract

An optical lens disclosed in an embodiment of the present invention includes: a recess concave from a bottom surface at a lower portion of a transparent body; a plurality of incident surfaces having a first incident surface on an upper surface of the recess, and a second incident surface and a third incident surface corresponding to both sides of the recess; a first total reflection plane and a second total reflection plane disposed on opposite sides of the body; and a first emission surface on an upper center of the body, a second emission surface on both sides of the first emission surface, and a third emission surface, wherein the first emission surface has a convex surface, the second emission surface has a convex surface, and the third emission surface includes a concave surface.

Description

TECHNICAL FIELD [0001] The present invention relates to an optical lens, a light unit having the optical lens,

The present invention relates to an optical lens.

The present invention relates to a light unit having an optical lens and a lighting apparatus.

Semiconductor devices including compounds such as GaN and AlGaN have many merits such as wide and easy bandgap energy, and can be used variously as light emitting devices, light receiving devices, and various diodes.

Particularly, a light emitting device such as a light emitting diode or a laser diode using a semiconductor material of Group 3-5 or 2-6 group semiconductors can be applied to various devices such as a red, Blue, and ultraviolet rays. By using fluorescent materials or combining colors, it is possible to realize a white light beam with high efficiency. Also, compared to conventional light sources such as fluorescent lamps and incandescent lamps, low power consumption, , Safety, and environmental friendliness.

In addition, when a light-receiving element such as a photodetector or a solar cell is manufactured using a semiconductor material of Group 3-5 or Group 2-6 compound semiconductor, development of a device material absorbs light of various wavelength regions to generate a photocurrent , It is possible to use light in various wavelength ranges from the gamma ray to the radio wave region. It also has advantages of fast response speed, safety, environmental friendliness and easy control of device materials, so it can be easily used for power control or microwave circuit or communication module.

Accordingly, the semiconductor device can be replaced with a transmission module of an optical communication means, a light emitting diode backlight replacing a cold cathode fluorescent lamp (CCFL) constituting a backlight of an LCD (Liquid Crystal Display) display device, White light emitting diodes (LEDs), automotive headlights, traffic lights, and gas and fire sensors. In addition, semiconductor devices can be applied to high frequency application circuits, other power control devices, and communication modules.

The embodiment provides a new optical lens.

The embodiment provides an optical lens having a long bar shape.

Embodiments provide an optical lens having at least three different incidence planes and at least three different emergence planes.

Embodiments provide an optical lens in which at least one of a first incident surface and a first exit surface has an asymmetric shape with respect to a central axis perpendicular to the bottom center of the recess.

An embodiment provides an optical lens in which a first incident surface and a first exit surface have an asymmetric shape with respect to a central axis perpendicular to the bottom center of the recess.

Embodiments provide an optical lens in which a second incident surface and a third incident surface disposed on both sides of the recess with respect to a central axis perpendicular to the bottom center of the recess have an asymmetrical shape with respect to each other.

The embodiment provides an optical lens in which the second exit surface and the third exit surface have an asymmetric shape with respect to a central axis perpendicular to the bottom center of the recess.

The embodiment provides a collimator lens of an asymmetrical shape.

The embodiment provides a light unit having an optical lens having a straight or curved bar shape on a plurality of light emitting elements.

The embodiment provides an optical lens having a long length in the arrangement direction of a plurality of light emitting elements and a light unit having the optical lens.

The embodiment provides an optical lens having a recess, an incident surface, and an exit surface in the arrangement direction of light emitting elements, and a light unit having the same.

The embodiment provides a light unit in which one or a plurality of optical lenses are arranged on one circuit board.

Embodiments provide a light unit in which light emitted from a plurality of optical lenses is emitted in the same direction or in mutually opposite directions.

A light unit and an illumination device each having an optical lens and a light emitting device according to an embodiment are provided.

An optical lens according to an embodiment includes: a recessed recess at a bottom of a transparent body from a bottom surface; A plurality of incident surfaces having a first incident surface on the upper surface of the recess, a second incident surface and a third incident surface corresponding to both sides of the recess; A first total reflection plane and a second total reflection plane disposed on opposite sides of the body; And a second exit surface and a third exit surface on both sides of the first exit surface, wherein the first exit surface has a convex curved surface, and the second exit surface Convex curved surface, and the third emitting surface includes a concave curved surface.

A lighting apparatus according to an embodiment includes: a housing having an open area inside; An optical member in an open region of the housing; A light emitting module having a plurality of light emitting elements on the housing and a circuit board on which the plurality of light emitting elements are arranged; An optical lens on the light output side of the light emitting module; And a top cover on the optical lens, the optical lens comprising: a recess in a lower portion of the transparent body, the recess being concave from the bottom surface and having a length longer than the width in the first axial direction; A plurality of incident surfaces having a first incident surface on the upper surface of the recess, a second incident surface and a third incident surface corresponding to both sides of the recess; A first total reflection plane and a second total reflection plane disposed on opposite sides of the body; And a second exit surface and a third exit surface on both sides of the first exit surface, wherein the first exit surface has a convex curved surface, and the second exit surface Convex curved surface, and the third emitting surface includes a concave curved surface.

A light unit or an illumination device having an optical lens according to an embodiment.

The embodiment can reduce noise such as hot spot caused by light emitted from the optical lens.

The embodiment can improve the light uniformity in the light unit.

The embodiment can emit the edge light in a uniform distribution with the optical lens.

The embodiment can improve the uniformity of light in the side view type light unit.

The embodiment can improve the reliability of a light unit having an optical lens and a lighting apparatus having the same.

1 is a perspective view showing an optical lens according to the first embodiment.
2 is an example of a side sectional view of the optical lens of Fig.
Fig. 3 is an example of a side sectional view for explaining the structure of the optical lens of Fig. 2;
Fig. 4 is an enlarged view of a first incident surface of the optical lens of Fig. 2;
Fig. 5 is a view showing an example of a first incident surface and a first exit surface of the optical lens of Fig. 2;
Fig. 6 is a view for explaining the relationship between the first incident surface and the second and third incident surfaces in the optical lens of Fig. 2;
7 is a side sectional view of the light unit having the optical lens of Fig.
8 is another example of the light unit of Fig.
FIG. 9 is a view for explaining a light path traveling to the first incident surface and the first exit surface in the optical lens of FIG. 7; FIG.
10 is a view for explaining a light path traveling to the second and third incident surfaces and the second and third exit surfaces in the optical lens of FIG.
Figs. 11 to 13 are modification examples of the light unit of Fig. 7, and are examples having a plurality of light units.
Figs. 14 and 15 are modification examples of the light unit of Fig. 7, in which a plurality of light units are disposed on opposite sides of each other.
16 is an exploded perspective view of the illumination device having the optical lens of Fig. 1, in the illumination device according to the second embodiment.
17 is an assembled perspective view of the illumination device of Fig.
Fig. 18 is a bottom view of the illumination device of Fig. 17; Fig.
Fig. 19 is a perspective view showing the AA side cross section of the illumination device of Fig. 17; Fig.
20 is a partially enlarged view of the illumination device of Fig.
Fig. 21 is a front view showing the AA side cross section of the illumination device of Fig. 17;
22 is a view for explaining the optical path by the optical lens of the illumination device of FIG.
23 is a view showing a light emitting element of the illumination device of Fig.
24 is a side cross-sectional view of the light emitting device of Fig.
25 is a diagram showing the light distribution of the illumination device according to the embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

In the description of the embodiment according to the present invention, in the case of being described as being formed "on or under" of each element, the upper (upper) or lower (lower) or under are all such that two elements are in direct contact with each other or one or more other elements are indirectly formed between the two elements. Also, when expressed as "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

The semiconductor device may include various electronic devices such as a light emitting chip or a light receiving chip. The light emitting chip and the light receiving chip may include the first conductivity type semiconductor layer, the active layer, and the second conductivity type semiconductor layer. The semiconductor device according to this embodiment may be a light emitting chip. The light emitting chip recombines electrons and holes to emit light, and the wavelength of the light is determined by the inherent energy bandgap of the material. Thus, the light emitted may vary depending on the composition of the material.

≪ Optical lens &

FIG. 1 is a perspective view showing the optical lens according to the first embodiment, FIG. 2 is an example of a side sectional view of the optical lens of FIG. 1, and FIG. 3 is an example of a side sectional view for explaining the structure of the optical lens of FIG. 2 .

1 to 3, the optical lens 300 according to the embodiment is a transparent body and has a length Y1 in the direction of the second axis Y is longer than a width X1 in the direction of the first axis X Can be arranged largely. The length Y1 of the optical lens 300 may be three times or more of the width X1. The direction of the first axis X may be the width direction of the optical lens 300 and the direction of the second axis Y may be the length direction of the optical lens 300. [ The width of the optical lens 300 may be the same as the width of the exit surfaces (or the length in the X-axis direction), and the length may be the same as the length of the exit surface (or the length in the Y-axis direction).

The optical lens 300 according to the embodiment may be a bar shape having a straight line shape. In the linear bar, the optical lenses 300 may be arranged in a linear shape with a predetermined length. The optical lens 300 may have a bar shape having a curved shape. In the curved bar, the optical lens 300 may have a predetermined curvature and a long length. The curved bar may have a bar shape in which the exit surfaces 340, 342 and 344 face each other or a bar shape in which the incident surface 310 and the bottom surfaces 302 and 304 correspond to each other. The curved bars may have a shape in which the centers of the lenses are arranged in the same line or the centers of the lenses are placed in different directions or gradually shifted such that the exit surfaces face different directions.

The thickness Z1 of the optical lens 300 according to the embodiment may be set to be less than the width X1 of the optical lens 300 and not more than 1 / 2.5 of the width X1 of the optical lens 300, 2.5 to 1 / 1.8. If the thickness Z1 of the optical lens 300 is smaller than the above range, the light extraction efficiency may be deteriorated. If the thickness Z1 is larger than the above range, the efficiency of light may be deteriorated. The optical lens 300 according to the embodiment can reduce the number of lenses and improve the luminance of the illumination light and the light uniformity.

The optical lens 300 may include a light-transmitting material. The optical lens 300 may include at least one of polycarbonate (PC), polymethyl methacrylate (PMMA), silicon or epoxy resin, or glass. The optical lens 300 may have a refractive index of 2 or less and may include a transparent material in a range of 1.4 to 1.7, for example.

2 and 3, the optical lens 300 includes a plurality of bottom surfaces 302 and 304, recesses 315 concavely recessed between the plurality of bottom surfaces 302 and 304, recesses 315, And a plurality of exit surfaces 340, 342, 344 for emitting light incident on the total reflection surfaces 332, 334, and a plurality of exit surfaces 340, 342, 344 for outputting light incident on the plurality of incident surfaces 310, ).

The plurality of bottom surfaces 302 and 304 of the optical lens 300 are a bottom surface of the body and include first and second bottom surfaces 302 and 304. The first and second bottom surfaces 302 and 304 are formed by the optical lens 300, And may be disposed on both sides of the recess 315. [0052] As shown in FIG. Here, the recess 315 may be recessed between the first and second bottom surfaces 302 and 304 in a light emitting direction. The second and third incident surfaces 312 and 314 may be disposed on both sides of the recess 315 in the width direction. Both longitudinal sides of the recess 315 may be open or other sides may be disposed. The first and second bottom surfaces 302 and 304 may support the optical lens 300. The bottom surfaces 302 and 304 may have a concave-convex structure along the longitudinal direction, but the present invention is not limited thereto. The first and second bottom surfaces 302 and 304 may be flat surfaces, and may be protrusions or protrusions.

The first bottom surface 302 overlaps with the second exit surface 342 in a vertical direction to support a bottom portion of the optical lens 300. A part of the first bottom surface 302 may overlap the region of the first exit surface 340 or the boundary region of the first and second exit surfaces 340 and 342 vertically. The first bottom surface 302 may not overlap the first total reflection surface 332 in the vertical direction or may be disposed inside the area of the first total reflection surface 332. [

The second bottom surface 304 may be disposed to overlap with the first exit surface 340 in the vertical direction to support a part of the bottom surface of the optical lens 300. A portion of the second bottom surface 304 may overlap vertically to the area of the third exit surface 344 or the boundary area of the first and third exit surfaces 340 and 344. [ The second bottom surface 304 may not overlap the second total reflection surface 334 in the vertical direction or may be disposed on the inner side of the second total reflection surface 334.

The first and second bottom surfaces 302 and 304 may be long in the longitudinal direction and disposed parallel to each other at the bottom center ZO of the recess 315. Each of the first and second bottom surfaces 302 and 304 may have a width of 2 mm or less, for example, a range of 0.5 mm to 2 mm. The width of the first and second bottom surfaces 302 and 304 is a width on an axis X0 that is horizontal to the bottom center ZO of the recess 315. If the width is narrower than the above range, There is a problem that the width X1 of the optical lens 300 becomes too large. The first and second bottom surfaces 302 and 304 may have the same or different widths in the asymmetric optical lens 300.

The length of the recess 315 may be long in the second axial direction, i.e., the longitudinal direction. The length of the recess 315 may be the same as the length Y1 of the optical lens 300. [ The length of the recess 315 may be smaller than the length Y1 of the optical lens 300. In this case, another incidence surface or another total reflection surface may be disposed outside the optical lens 300 in the longitudinal direction have.

The recess 315 may be disposed at a predetermined depth and a predetermined width from the bottom center ZO. The recess 315 may have a shape in which the upper width D3 is narrower than the bottom width D2. The difference between the upper width D3 and the lower width D2 may be a difference of 0.8 mm or more, for example, in a range of 0.8 mm to 1.2 mm Lt; / RTI > If the difference between the top width D3 of the recess 315 and the bottom width D2 is larger or smaller than the above range, the incident distribution of light may be varied. The bottom width D2 of the recess 315 may be in the range of 3 mm or more, for example, 3 mm to 4 mm, and the top width D3 of the recess 315 may be in the range of 2 mm to 2.8 mm. The bottom width D2 of the recess 315 may be two times wider than the width of the light emitting device described later. The upper width D3 of the recess 315 is arranged to be larger than the width of the light emitting device described later, so that the lowering of the incidence efficiency of light can be prevented. Since the recess 315 is long in the longitudinal direction, a plurality of light emitting elements can be disposed inside the recess 315, thereby maximizing the light incidence efficiency.

The plurality of incidence planes 310, 312, and 314 may be disposed on the upper surface and both sides of the recess 315, The plurality of incident surfaces 310, 312 and 314 includes a first incident surface 310 which is the upper surface of the recess 315 and second and third incident surfaces 312 and 314 which are both sides of the recess 315. The first incident surface 310 may be curved and may include a convex curved surface that protrudes toward the bottom of the recess 315, for example. The first incident surface 310 may include a curved surface having a predetermined radius of curvature. Since the first incident surface 310 is provided as a curved surface with a downward convex shape, the incident light can be refracted to the first exit surface 340.

The second and third incident surfaces 312 and 314 may be opposite to each other or correspond to each other. The second incident surface 312 may be disposed between the first incident surface 310 and the first bottom surface 302 and the third incident surface 314 may be disposed between the first incident surface 310 and the first bottom surface 302, And the second bottom surface (304).

The second incidence surface 312 may be a concave curved surface and the concave curved surface may be a curved surface recessed toward the first total reflection surface 332. The second incident surface 312 has a concave curved surface, thereby suppressing the reflection of the incident light and refracting the incident light to the first total reflection surface 332. As another example, the second incident surface 312 may be a convex curved surface or a flat inclined surface. The third incident surface 314 may have a concave curved surface and the concave curved surface may be a curved surface concaved in the direction of the second total reflection surface 334. The third incidence plane 314 has a concave curved surface, thereby suppressing the reflection of the incident light and refracting the incident light to the second total reflection plane 334. As another example, the third incident surface 314 may be a convex curved surface or a flat inclined surface.

As shown in FIG. 2, the plurality of exit surfaces 340, 342, and 344 are disposed on the upper portion of the body. The plurality of exit surfaces 340, 342, and 344 are convex first exit surfaces 340, Emitting surfaces 342 and 344. The first exit surface 340 may be disposed between the second and third exit surfaces 324 and 344. The plurality of exit surfaces 340, 342, and 3444 may include a first exit surface 340 for refracting and emitting the light incident on the first incident surface 310, a second exit surface 340 for reflecting the light incident through the second incident surface 312, A second exit surface 342 for refracting and emitting light, and a third exit surface 344 for refracting the light incident through the third incident surface 314 and emitting the light. The area of the first exit surface 310 may overlap the first incident surface 310, the second and third incident surfaces 312 and 314 in the vertical direction.

The second exit surface 342 has a curved surface convex in the light exit direction, and the third exit surface 344 has a curved surface convex in the light exit direction, For example, a concave curved surface that is depressed in the direction of the second total reflection surface 334. In the embodiment, the first and second exit surfaces 340 and 342 are formed in a convex curved surface, and the third exit surface 344 is disposed in a concave curved surface, so that the light refracted by the third exit surface 344, 2 traveling in the traveling direction of the light refracted by the emitting surfaces 340 and 342, and can be irradiated to different regions or mixed with each other.

The plurality of total reflection surfaces 332 and 334 are disposed along the longitudinal direction of the optical lens 300 as both sides of the width direction of the body and reflect the path of the incident light in the emission direction. The plurality of total reflection surfaces 332 and 334 include first and second total reflection surfaces 332 and 334 and the first total reflection surface 332 is disposed between the first bottom surface 302 and the second emission surface 342 And the second total reflection surface 334 is disposed between the second bottom surface 304 and the third emission surface 344. The plurality of total reflection surfaces 332 and 334 includes a first total reflection surface 332 disposed outside the second incident surface 312 and the second emission surface 342 and a second total reflection surface 332 disposed between the third incident surface 314 and the second exit surface 342. [ And a second total reflection surface (334) disposed outside the third exit surface (344)

The first total reflection surface 332 has an outwardly convex curved surface and reflects the light incident on the second incident surface 312 to the second exit surface 342. The second total reflection surface 334 has an outwardly convex curved surface and reflects the light incident on the third incident surface 314 to the third emission surface 344. [ Each of the first and second total reflection surfaces 332 and 334 may include curved surfaces having different radii of curvature.

2, the first exit surface 340 of the optical lens 300 is disposed in the center area of the exit side and has a convex curved surface in the direction of the central axis P0, It can have a curved surface convex in the opposite direction. The first exit surface 340 may include a curved surface having a curvature radius smaller than the curvature radius of the first incident surface 310.

The width X2 of the first exit surface 340 may be set to be at least two times the width D3 of the first incident surface 310, for example, 1.2 to 5 times. When the width X2 of the first exit surface 340 is smaller than the above range, the amount of light incident on the first exit surface 340 through the first incident surface 310 is reduced, When the width X2 of the first exit surface 340 is larger than the above range, the improvement of the exit efficiency is insignificant and the width X3 of the second and third exit surfaces 342 and 344 ) May be different.

The first through third exit surfaces 340, 342, and 344 may have the same length as the length Y1 of the optical lens 300. [ Since the first to third emitting surfaces 340, 342 and 344 are arranged to have the same length as the recess 315, refraction is performed on the light incident through the first to third incident surfaces 310, 312 and 314, can do. As another example, the first exit surface 340 may have a length equal to the length Y1 of the optical lens 300, and the second and third exit surfaces 342 and 344 may have a length equal to the length Y1 of the optical lens 300 And may have a length shorter than the length Y1. This is because the area adjacent to the first and second total reflection surfaces 332 and 334 of the side walls (346 and 348 in FIG. 1) of the optical lens 300 can be arranged as a sloped surface. Both sidewalls 346 and 348 of the optical lens 300 may be formed in a vertical plane or a sloped area in a region adjacent to the first and second exit surfaces 342 and 344.

In the embodiment, the optical lens 300 has an asymmetric shape with respect to the center axis PO orthogonal to the bottom center Z0. The centers of the first, second, and third incident surfaces 310, 312, and 314 and the center of the first exit surface 340 are shifted from the center axis P0 in the direction of the first full reflection surface 334, for example.

At least one or both of the first incident surface 310 and the second emergent surface 340 may have an asymmetric shape with respect to a central axis PO perpendicular to the bottom center of the recess 315 . For example, the first incident surface 310 may be formed asymmetrically with respect to the center axis P0. The first exit surface 340 may have an asymmetric shape with respect to the center axis PO.

The second incident surface 312 and the third incident surface 314 have an asymmetric shape with respect to the center axis P0 perpendicular to the bottom center of the recess 315. [ The first total reflection surface 332 and the second total reflection surface 334 may be asymmetric with respect to the center axis P0. The second exit surface 342 and the third exit surface 344 have an asymmetrical shape with respect to the center axis PO. The recess 315 has an asymmetric shape with respect to the center axis PO. The asymmetric shape may be a left or right direction with respect to the center axis P0 or the X axis direction, a width direction of the optical lens, or an asymmetric shape in the X axis direction.

2 and 3, the height Z1 of the second exit surface 342 is higher than the height Z2 of the third exit surface 344 in the thickness direction of the optical lens 300, The low point height Z3 of the second exit surface 342 may be arranged to be higher than the low point height Z4 of the third exit surface 344. [ The high point of the second exit surface 342 is a boundary point P3 between the second exit surface 342 and the first total reflection surface 332 and the low point of the second exit surface 342 is a point Is the boundary point P1 between the exit surface 340 and the second exit surface 342 and the peak of the third exit surface 344 is the boundary between the third exit surface 344 and the second total exit surface 344 And a low point of the third exit surface 344 may be a boundary point P2 between the third exit surface 344 and the first exit surface 340. [ The height Z5 of the apex of the first exit surface 340 may be disposed at a position higher than both the points P1 and P2. The height Z3 of the boundary point P1 between the first and second exit surfaces 340 and 342 is set to be higher than the height Z4 of the boundary point P2 between the first and third exit surfaces 340, . The height Z6 of the boundary point P5 between the first incident surface 310 and the second incident surface 312 is greater than the height Z5 between the first incident surface 310 and the third incident surface 314 P6, respectively, as shown in Fig. The height of each of the points P1, P2, P3, P4, P5, and P6 may be a straight line (X0 in FIG. 2) horizontal to the bottom of the optical lens 300. The relation of the heights has a relation of Z1> Z2> Z3> Z4> Z6> Z7, and Z5 can have the relationship of Z2> Z5> Z3> Z4.

The optical lens 300 has an asymmetrical shape having a height difference between the two points P5 and P6 of the first incident surface 310 and a height difference between the two points P1 and P2 of the first emitting surface 340 The path of the emitted light can be adjusted and the distribution of light can be uniformly provided by different optical paths.

The width X2 connecting the two points P1 and P2 of the first emitting surface 340 is determined by the width X3 connecting the two points P1 and P3 of the second emitting surface 342, The relationship of the width X4 connecting the two points of the third emission surface 344 may have a relationship of X3 > = X2 > X4. The widths (X2, X3, X4) represent the straight line length in the horizontal direction.

3, the angles of the respective points with reference to the bottom center Z0 and the central axis P0 of the optical lens 300 are the angles of the first incident surface 310, The angle R1 between the center point P0 and the center point P0 may be equal to or less than the angle R2 between the point P6 and the center axis P0. That is, R1? R2, R2 is in the range of 34 degrees to 38 degrees, and the difference between R1 and R2 may be 3 degrees or less. By arranging the first incident surface 310 having such angles R1 and R2 on the recess 315, the light emitted to the upper surface of the light emitting element can be effectively incident. The first incident surface 310 effectively receives light in the region between the second and third incident surfaces 312 and 314 because R1 and R2 have an angle less than 1/2 of the half angle angle at the light directing angle of the light emitting device, Can receive.

The angle R4 between the point P1 and the center axis P0 with respect to the bottom center Z0 is smaller than the angle R5 between the point P2 and the center axis P0 . The angle R5 between the point P3 and the point P1 may be greater than the angle R6 passing the point P2 and point P4. R5 is an angle of the second exit surface 342, R6 is an angle of the third exit surface 344, and R5> R6, and R5 is at least three times, for example, four times to six times Range. The angle R3 of the first exit surface 340 may be more than 50 degrees and the angles R4 and R5 may be different from each other with respect to the central axis P1. The third exit surface 344 having the concave curved surface is arranged to be smaller than 1/3 of the angle R5 of the second exit surface 342 having the curved surface with the convex angle R6, The emitted light amount and the optical path can be adjusted.

4, the structure of the first incident surface 310 includes a line extending from the point P5 to the tangent line of the first incident surface 310 and a center axis P0 (B1 / b2) of the first triangle connected to the first triangle may be in the range of 0.5 0.02. The relationship between the height b1 and the base b2 of the triangle may be a relationship of b1 < b2, for example, b2 may be at least 1.5 times b1. A tangent value b3 / b4 of the second triangle connecting the extension line of the tangent line from the point P6 to the first incident surface 310 to the center axis P0 with respect to the point P6 of the first incident surface 310, May be in the range of 0.25 0.02. The relationship between the height b3 of the triangle and the base b4 may be a relation of b3 < b4, for example, b4 may be three times or more of b1. Here, the ratio of the tangent value of the first triangle to the tangent value of the second triangle may be in the range of 0.5 0.06, for example, the tangent value of the second triangle may be 1.5 times larger than the tangent value of the first triangle. This is because the height of the point P5 and the point P6 of the first incident surface 310 are different and the difference between the tangent of the first incident surface 310 and the tangent of the first incident surface 310 causes the light incident on the first incident surface 310 May be refracted to be incident on the first exit surface (340).

Referring to FIG. 5, the left region of the optical lens 300 is referred to as a center (P0) of the optical lens 300. The left region corresponds to the center of the upper surface of the light emitting device 100, the central axis P0, (C3 / c4) of the second triangle connecting the tangent (c2 / c1) of the first triangle to the center 101, the central axis P0 and the point P1 of the upper surface of the light emitting device 100 May have a range of 1.5 or more, for example, 1.75 + 0.15. The tentance value c3 / c4 of the first triangle may be in the range of 0.6 to 0.9, for example, 0.7 +/- 0.02, and the tangent value c3 / c4 of the second triangle may be in the range of 0.3 to 0.6, 0.02 &lt; / RTI &gt; The c4 may be at least two times c1. The top surface center 101 of the light emitting device 100 may be the center of the emission side and may be positioned higher than the bottom of the recess 315 by a range of 0.5 to 1 mm.

The right side region of the optical lens 300 has a tangent of a third triangle connecting the center 101 of the upper surface of the light emitting element 100, the central axis P0, The ratio of the tangent value e3 / e4 of the fourth triangle connecting the value e2 / e1 to the center 101 of the upper surface of the light emitting device 100, the central axis P0 and the point P2 is 0.9 to 1.5 For example, 1.072 +/- 0.07. The tentant value e3 / e4 of the third triangle may be in a range of 0.6 to 0.9, for example, 0.75 ± 0.02, and the tangent value e3 / e4 of the fourth triangle may be in a range of 0.6 to 0.9, 0.02 &lt; / RTI &gt; E4 may be at least two times e1. The center of the top surface of the light emitting device may be the center of the emitting surface, and may be positioned higher than the bottom of the recess 315 by a range of 0.5 to 1 mm. The tangent values of the first to fourth triangles are larger than the tangent values of the first and fourth triangles, and the tangent values of the second triangles are larger than the tangent values of the second triangles. have.

When the ratio of the tangent values of the first and second triangles is a first ratio and the ratio of tangent values of the third and fourth triangles is a second ratio, the relationship between the first ratio and the second ratio is not less than 1.5, 1.5 or more and 1.9 or less.

Referring to FIG. 6, the relationship between the light emitting device and the first to third incident planes 310, 312, and 314 is shown as a tangent of a first triangle connecting a horizontal straight line on the upper surface of the light emitting device 100 and a straight line perpendicular to the point P5 the value of the tangent (e5 / e1) of the second triangle connecting the straight line perpendicular to the point P6 may be in the range of 0.3 or more, for example, 0.34 ± 0.02 have. Here, the tangent of the first triangle may be smaller than the tangent of the second triangle. The ratio of the tangent of the first triangle to the tangent of the second triangle may be in the range of 0.5 or more, for example, 0.5 to 0.7.

Referring to FIG. 7, in the light unit according to the embodiment, the circuit board 400 and the light emitting device 100 may be disposed under the optical lens 300. The light emitting module may include the light emitting device 100 and the circuit board 400 and the light unit may include the optical lens 300, the circuit board 400, and the light emitting device 100.

One or more, for example, a plurality of light emitting devices 100 may be disposed on the circuit board 400 in the longitudinal direction of the optical lens 300. The plurality of light emitting devices 100 may be arranged along the optical lens 300 at a predetermined interval. The light emitting device 100 may be disposed in the recess 315 of the optical lens 300. The upper surface of the light emitting device 100, that is, the light emitting surface may be disposed above the bottom of the recess 315. The light emitting device 100 has one or a plurality of LED chips therein, and its thickness D1 may be 1.2 mm or less, for example, 1 mm or less.

The circuit board 400 may connect the plurality of light emitting devices 100 to each other, for example, in series, parallel, or series-parallel. The circuit board 400 may include a layer disposed below the optical lens 300 and absorbing or reflecting the light leaked from the optical lens 300. The optical axis of the light emitting device 100 may be aligned with the center axis P0 of the optical lens 300 so that the optical axis may be the center axis P0. The light emitting device 100 may be symmetrical with respect to the center axis P0. With respect to the optical axis of the light emitting device 100, the first incident surface 312 may have an asymmetric shape. The second incident surface 312 and the third incident surface 314 may have an asymmetric shape with respect to the optical axis of the light emitting device 100. [ With respect to the optical axis of the light emitting device 100, the first emitting surface 340 may have an asymmetric shape. The both side second exit surface 342 and the third exit surface 344 of the first exit surface 340 may have an asymmetric shape with respect to the optical axis of the light emitting device 100. [ The first total reflection plane 332 and the second total reflection plane 334 may have an asymmetric shape with respect to the optical axis of the light emitting device 100. [

The circuit board 400 may include at least one of a resin-made PCB, a metal core PCB (MCPCB) having a metal core, and a flexible PCB (FPCB), but the present invention is not limited thereto. The light emitting device 100 may emit at least one or more than two of white, blue, green, red, yellow, and ultraviolet light, but the present invention is not limited thereto.

The width of the circuit board 400 may be wider than the bottom width (D2 in FIG. 2) of the recess 315, and may be 5 mm or more. The circuit board 400 may be in contact with the first and second bottom surfaces 302 and 304 of the optical lens 300. The width of the circuit board 400 may be wider than the width of the optical lens 300 in order to reflect the light traveling downward from the optical lens 300.

The length of the circuit board 400 is longer than the length of the optical lens 300 (Y1 in FIG. 1), and the light leaked from the optical lens 300 can be absorbed or reflected. One or a plurality of optical lenses 300 may be disposed on the circuit board 400.

The light emitting device 100 may be disposed in the recess 315 of the optical lens 300. The light emitting device 100 may be disposed adjacent to the first incident surface 310 and the second and third incident surfaces 312 and 314 of the recess 315. The lower surface of the light emitting device 100 may be disposed above the bottom surfaces 302 and 304 of the optical lens 300. The lower surface of the light emitting device 100 may be disposed above the upper surface of the circuit board 400. The lower surface of the light emitting device 100 may be disposed above the upper surface of the circuit board 400. The light emitted from the light emitting device 100 is incident on the first incident surface 310 of the optical lens 300 and the second incident surface 310 of the optical lens 300, May be incident through the surfaces 312 and 314. Thus, the loss due to the light emitted from the light emitting device 100 can be reduced.

As shown in FIG. 8, the light emitting device may be disposed below the recess 315. The light emitting device 100 may be disposed on the same horizontal line as the bottom surfaces 302 and 304 of the optical lens 300 or may be disposed further below. Considering the light-directing angle distribution of the light emitting device 100, the light emitting device 100 may be disposed below the bottom surface of the optical lens 300, or the depth of the recess 315 may be reduced. The relationship between the top surface center 101 of the light emitting device 100, the recess 315, and the incident surfaces can be applied to the relationships shown in Figs. 4 and 5. The depth of the recess 315 may be 2 mm or less.

Referring to FIG. 9, the angle of the light traveling to the left or upper region with respect to the center axis P0 of the optical lens 300 can be compared with the angle of the light traveling to the right region or the lower region. The left area or the upper area may be defined as a first area, and the right area or the lower area may be defined as a second area. Light traveling to the first region may be represented by a positive angle, and light traveling to a second region may be represented by a negative angle.

The first exit surface 340 of the optical lens 300 is inclined at a first angle a1 with respect to the center axis P0 on the first incident surface 310, And the first angle a1 may be in a range of 0 degree to +38 degrees, and the second angle a2 May have an angle smaller than the first angle a1. Here, the ratio of a2 / a1 may be 0 or more and 1 or less, and may have a range of 0? A2 / a1? 1, for example.

The first exit surface 340 of the optical lens 300 has a first incident surface 310 at a first angle with respect to the central axis P0 as viewed from the second region of the first exit surface 340, and the first angle b1 may be in the range of -36 degrees to 0 degrees, and the second angle (b2) may be in the range of -36 degrees to 0 degrees, and the second angle (b2) b2 may have an angle smaller than the first angle b1. Here, the ratio a2 / a1 may be -0.7 or more and 0 or less, for example, -0.7? B2 / b1? 0. The lights L1 and L2 emitted to the first exit surface 340 may be emitted in a direction away from the center axis P0 with respect to the center axis P0. This allows the light L1 and L2 emitted to the first exit surface 340 to refract not only in the horizontal light but also in the upward direction from the central axis P0.

10, the second exit surface 342 of the optical lens 300 is positioned on the second incident surface 312 with respect to the center axis P0 The first angle c1 is refracted with respect to the third light L3 incident at the first angle c1 and emitted at the second angle c2, and the first angle c1 is in a range of 36 degrees to 60 degrees And the second angle c2 may have an angle smaller than the first angle c1. Here, the ratio of c2 / c1 may be 0 or more and 0.1 or less, and may have a range of 0? C2 / c1? 0.1, for example.

The third exit surface 344 of the optical lens 300 has a third incident surface 314 at a first angle d1 with respect to the central axis PO as viewed from the second exit- The first angle d1 may be in a range of -60 degrees to -36 degrees (+/- 2), and the second angle d2 may be in a range of -60 degrees to -36 degrees (+/- 2 degrees) The second angle d2 may have an angle smaller than the first angle d1. Here, the ratio of d2 / d1 may be -0.2 or more and 0 or less, for example, -0.2? D2 / d1? 0.

The light L3 emitted to the second exit surface 342 may be emitted in a direction away from the center axis P0 with respect to the center axis P0. This allows the light L3 emitted to the second exit surface 342 to be refracted in a direction higher than the central axis P0 so as to form a light distribution in the upper direction. The light L4 emitted to the third exit surface 343 may be emitted in a direction approaching the center axis P0 with respect to the center axis P0. This allows the light L4 emitted to the third exit surface 343 to travel in a direction approaching the central axis P0 from the lower portion of the central axis PO to form a light distribution in the upper direction.

As shown in Figs. 9 and 10, the embodiment differs from the first embodiment in that the light beams L1, L2, L3 and L4 emitted through the first exit surface 340, the second exit surface 342 and the third exit surface 344 are refracted It can be irradiated toward different targets on the first region by being angled and proceeding in the direction of the first region. Thus, the light distribution can be provided with a uniform distribution.

11 to 15 are modifications of the light unit according to the embodiment.

11, the first optical lens 300 of the first light unit and the second optical lens 300B of the second light unit are arranged in parallel to each other, and the first optical lens 300 and the second optical lens 300B The lens 300B may be arranged to be symmetrical with respect to each other. For example, the first optical lens 300 is arranged such that the second exit surface 342 is disposed on the left first region with respect to the center axis P0, and the second optical lens 300B is disposed with respect to the center axis PO And the second exit surface 342 is disposed on the right second area. Accordingly, the first and second optical lenses 300 and 300B can be irradiated with light in opposite directions with respect to the center.

12, the first optical lens 300 of the first light unit and the second optical lens 301 of the second light unit are arranged in parallel to each other, and the first optical lens 300 and the second optical lens 301 The lenses 301 may be arranged in the same structure. For example, in the first optical lens 300, the second exit surface 342 is disposed on the left first area with respect to the center axis PO, and the second optical lens 301 is disposed on the left- A second exit surface 342 is disposed on the first area. Accordingly, the first and second optical lenses 300 and 301 can be irradiated with light in the first region direction with respect to the center.

13, the first optical lens 300 of the first light unit and the second optical lens 300 of the second light unit are arranged in parallel with each other, and the first optical lens 300 and the second optical lens 300, The lenses 300 can be arranged symmetrically with respect to each other. For example, the first optical lens 300 has the second exit surface 342 disposed on the right second area with respect to the center axis PO, and the second optical lens 300 has the center axis P0 as the reference And a second exit surface 342 is disposed on the left first area. Accordingly, the first and second optical lenses 300 can be irradiated with light in the center direction with respect to the center.

Referring to FIG. 14, the first optical lens 300 of the first light unit and the second optical lens 300C of the second light unit may be opposed to each other or may be located on opposite sides. The first optical lens 300 and the second optical lens 300C may be disposed symmetrically with respect to the center. For example, the first optical lens 300 is arranged such that the second exit surface 342 is disposed on the upper first region with respect to the central axis PO, and the second optical lens 300C is disposed with respect to the central axis PO And a second exit surface 342 is disposed on the upper first region. Accordingly, the first and second optical lenses 300 and 300C can be irradiated with light in the upward direction of the center. In this case, the first and second optical lenses 300 and 300C may have a reflective sheet 160A or a reflective structure disposed thereon, and a sheet 180A for transmitting light may be disposed thereunder. The sheet 180A for light transmission may include at least one of a diffusion sheet, a prism sheet, and a transparent sheet. The first and second light units may be disposed at the same height or at different heights.

Referring to FIG. 15, the first optical lens 300 of the first light unit and the second optical lens 300 of the second light unit may be arranged to face each other. The first optical lens 300 and the second optical lens 300 may be disposed in opposite directions with respect to the center. For example, the first optical lens 300 has the second exit surface 342 disposed on the upper first region with respect to the central axis PO, and the second optical lens 300 has the center axis P0 as the reference And the third emission surface 344 is disposed on the lower first region. Accordingly, the first and second optical lenses 300 can be irradiated with light in the upper / lower direction of the center. In this case, the first and second light units may be arranged at the same height or at different heights.

The optical lens 300 according to the embodiment may be a bar shape having a linear shape or a bar shape having a curved shape. Hereinafter, for convenience of explanation, a bar-shaped optical lens 300 having a curved shape and an illumination device having the optical lens 300 will be described.

16 is an exploded perspective view showing the illumination device having the optical lens of Fig. 2, Fig. 17 is an assembled perspective view of the illumination device of Fig. 16, and Fig. 18 is an exploded perspective view of the illumination device of Fig. 19 is a perspective view showing the AA side end face of the illumination device of Fig. 17, Fig. 20 is a partially enlarged view of the illumination device of Fig. 19, and Fig. 21 is a cross- And FIG. 22 is a view for explaining the optical path by the optical lens of the illumination device of FIG.

16 to 22, the lighting device includes a housing 110 having a circular outer periphery and an open region 10 disposed at a lower portion thereof, a plurality of An optical lens 300 according to an embodiment of the present invention is disposed on the light emitting side of the light emitting module 170 and a light emitting module 170 disposed on the rear side of the light emitting module 170, An upper cover 160 coupled to the housing 110 at the outside of the heat radiating frame 150 and reflecting the light emitted from the optical lens 300, And an optical member 180 disposed in the open region 105 of the optical lens 300 and diffusing and emitting the light emitted from the optical lens 300 and the light reflected by the top cover 160.

As shown in FIGS. 16 to 19, the housing 110 has a circular shape in its lower periphery, for example, an outer shape. The radius r2 of the housing 110 may be 100 mm or more, for example, 130 mm or more, but is not limited thereto. The thickness of the lighting apparatus having such a housing 110 may be 10 mm or more, for example, 15 mm or more. The thickness of the illumination device may range from 15 mm to 30 mm. The illuminating device can reduce the light diffusion space by employing the optical lens 300 inside. Here, the radius r1 of the optical lens 300 may be 90 mm or more, for example, 110 mm or more. One or more, for example, two or more of the optical lenses 300 may be arranged along the ring shape in the illumination device. The two or more optical lenses 300 may have the same length or different lengths.

The housing 110 includes at least one of a plastic material such as PC (Polycarbonate), PET (polyethylene terephthalate glycol), PE (polyethylene), PSP (polystyrene paper), PP can do. The housing 110 may be formed of a material having high light reflectivity, or a reflective layer may be further formed on the inner surface. The housing 110 may be a metal or a non-metallic material. In the case of the metal, it may include at least one of aluminum, an aluminum alloy, silver, and a silver alloy.

As shown in FIG. 20, the housing 110 may have an outer frame 112 around the outer periphery. A light emitting module (170) is disposed in the outer frame (112). The outer frame 112 may be coupled to the outer frame 165 of the upper cover 160. The outer frame 112 may be integrally formed with the housing 110 or may be coupled with another material. The outer frame part 112 may protrude outward around the outer circumference of the housing 110 to enhance the rigidity of the outer circumference of the housing 110. The outer frame part 160 of the upper cover 160 Can be easily combined with each other.

The outer frame part 112 of the housing 110 includes a recess 27 on the inner side and the recessed part 26 of the recessed part 26 can be engaged with the outer protrusion 155 of the heat dissipating frame 150. The supporting portion 113 of the housing 110 supports the outer circumference of the optical member 180.

A plurality of fastening holes 17 may be formed in the housing 110 and fastening means may be fastened through the fastening holes 16 of the outer frame 165 of the upper cover 160 .

A heat radiating frame 150 is coupled to the housing 110 and a lower portion of the heat radiating portion 151 of the heat radiating frame 150 can be inserted into the groove 20 of the housing 110. The grooves 20 may be formed in a circular shape along the lower portion of the heat radiation frame 150. The heat dissipation frame 150 is a heat dissipation member made of a metal and can dissipate heat generated from the light emitting module 170. The heat dissipation frame 150 may include an optional alloy having at least one or at least one of Ag, Ni, Al, Rh, Pd, Ir, Ru, Mg, Zn, Pt, Cu, . The heat radiating frame 150 may be a single layer or a multilayer.

The heat radiating frame 150 may be formed to be wider than the width (height) of the circuit board for heat radiation efficiency, thereby increasing the heat radiating surface area.

The optical lens 300 may be disposed on the light emitting module 170 and on the support portion 153 of the heat dissipating frame 150. The supporting portion 153 of the heat dissipating frame 150 supports the optical lens 300 and supports the top surface of the optical member 180. The supporting portion 153 of the heat dissipating frame 150 protrudes inward and may be disposed between the upper surface of the optical member 180 and the optical lens 300.

The light emitting module 170 may include a circuit board 171 and a plurality of light emitting devices 173 arranged inside the circuit board 171. At least one or a plurality of the circuit boards 171 may be arranged in a circular shape. The circuit board 171 may be a flexible board or may include at least one of a resin printed circuit board (PCB), a metal core PCB (MCPCB), and a ceramic substrate. have. As another example, the light emitting module 170 may be bonded to another member without the circuit board 171. The circuit board 171 may be attached to the heat radiating portion 151 of the heat radiating frame with an adhesive member or a heat dissipative adhesive. The circuit board 171 may be disposed perpendicularly to the heat dissipation unit 151. The back surface of the circuit board 171 may be disposed at an angle of 90 degrees with respect to the horizontal axis, or may be disposed within a range of 90 degrees or more and 120 degrees or less. That is, the circuit board 171 may be disposed at an angle of 90 degrees or more with respect to the horizontal axis, so that the amount of light directly irradiated to the optical member 180 from the light emitted from the light emitting device 173 can be reduced.

The emitting surface of the light emitting device 173 may correspond to or be offset from the circuit substrate 171 on the opposite side. The emitting surface of the light emitting device 173 may be disposed at an angle of 90 degrees or more with respect to a horizontal axis. The light emitting devices 173 may be arranged on the circuit board 171 in one row or two or more rows, but the present invention is not limited thereto. The light emitting device 173 may emit at least one of blue, red, green, white, and UV light, and may emit white light for illumination. The light emitting device 173 may be mounted on the circuit board 171 in the form of a chip or a package and the directional angle of the light emitting device 173 may be in the range of 115 degrees or more, However, it is not limited thereto.

The light emitting device 173 according to the embodiment may include a warm white LED and a cool white LED on the circuit board 171, for example. Warm white light emitting diodes and cool white light emitting diodes emit white light. White light emitting diodes and cool white light emitting diodes can emit white light of mixed light by radiating the correlated color temperature, so that a color rendering index (CRI) indicating a close proximity to natural sunlight is increased. Therefore, it is possible to prevent the color of the actual object from being distorted and to reduce the fatigue of the user's eyes.

One or a plurality of the optical lenses 300 may be formed in a ring shape in the illumination device. The number of the plurality of optical lenses is two or three or more, but is not limited thereto. The optical lens 300 is an optical lens of the embodiment, for example, with reference to the structure and description as shown in Fig.

Here, the upper cover 160 may be made of a plastic material or a resin material. The upper cover 160 may be a highly reflective resin material. The upper cover 160 may be made of, for example, PET poly (ethylene terephthalate), PC (polycarbonate), or PVC poly (vinyl chloride) resin, but is not limited thereto. The reflective resin material may be formed of a highly reflective resin material by adding impurities to a resin material such as silicon or epoxy. The impurities may include at least one of materials such as SiO ₂ , TiO ₂ , Al ₂ O ₃ , and MgO. The upper cover 160 may have a reflective surface 163 corresponding to the optical member 180 under the reflective portion 161 and the reflective surface 163 may have a highly reflective surface or a rough surface have. By employing the optical lens 300, the reflection surface of the optical member 180 can be provided in a flat or horizontal plane. The reflective surface may be a flat surface, a concave curved surface, and / or a convex curved surface. The reflecting surface 163 may be coated with or coated with a reflective material, or a highly reflective material may be formed roughly.

The outer circumference of the optical member 180 can be sandwiched between the supporting portion 153 of the heat dissipating frame 150 and the supporting portion 113 of the housing 110 to prevent the external movement from being blocked, . The optical member 180 may include a diffusion sheet. The diffusion sheet spreads the incident light so that the light is irradiated to the illumination area with a uniform light intensity. The optical member 180 may include at least one of a diffusion material such as polymethyl methacrylate ( PMMA ), polypropylene (PP), polyethylene (PE), and polystyrene (PS). A plurality of optical sheets may be disposed on the optical member 180, but the present invention is not limited thereto. The lower circumference of the optical member 180 can be prevented from being struck by the support portion 113 of the housing 110. [

2, the optical lens 300 is disposed such that the first exit surface 340 is disposed above the third exit surface 344 and the second exit surface 342 is disposed above the first exit surface 340 . Light emitted to the first and second exit surfaces 340 and 342 of the optical lens 300 may be emitted toward the upper direction with respect to the central axis P0 in the direction of the reflection portion 161 of the upper cover 160 . The light emitted to the third emitting surface 344 of the optical lens 300 travels in the direction of the central axis P0 or in the direction of the reflecting portion 161 of the upper cover 160. [ The light emitted by the first, second and third emitting surfaces 340, 342 and 344 of the optical lens 300 is irradiated to different regions of the upper cover 160 to provide a uniform light distribution. In this case, Light of a uniform distribution can be irradiated toward the optical member by the light guide 160.

19 and 22, the central point of the upper cover 160 is defined as (0.0), and the light emitting module portion on the opposite side is defined as a light entrance portion. For example, the left side is defined as a left light entrance portion, And can be defined as a light-incoming portion. The center of the upper cover 160 is defined as (-1,0) the left light incoming portion point, (1,0) the right light incoming portion point, and the intermediate point between the center point and the left light entrance portion -0.5), and an intermediate point between the center point and the right light-incoming portion is assumed to be (0.5), the light is emitted to the first exit surface 340 of the first region as shown in FIG. 9 with reference to the left light- The first light advances to a point of -0.5 and the second light traveling to the second exit surface 342 of the second region proceeds to a point of 0.25, and the second light exit surface 342 of the first region, The light emitted to the third exit surface 344 of the second region proceeds to the center point. That is, the light emitted from the optical lens 300 of the one light-incident portion covers from the -0.5 point to the opposite side 0.25 point of the upper cover 160, so that the light emitted from the optical lens 300, The entire area of the upper cover 160 can be irradiated. Light traveling to the first, second, and third portions 340, 342, 344 of the optical lens 300 is uniformly distributed over the entire area of the upper cover 160.

The upper cover 160 reflects the incident light as described above to the optical member 180, and the optical member 180 further diffuses the uniformly distributed light and emits the light. Accordingly, the hot spot problem in the emitted light can be suppressed, and the uniform light intensity distribution as shown in FIG. 25 can be obtained. The unity index (UGR) of the lighting apparatus of the present invention is 19 or less, indicating that the user does not have an uncomfortable glare. In the CIE criteria, users are classified as having discomfort when the Discomfort Index (UGR) is 21 or more.

23 and 24 are views showing an example of a light emitting element in an illumination device or an optical lens according to the embodiment.

23 and 24, the light emitting device 173 includes a body 210 having a concave portion 260, a plurality of lead frames 221 and 231 in the concave portion 260, 260 at least one light emitting chip (271, 272).

The body 210 may include an insulating material or a conductive material. The body 210 may include at least one of a resin material such as polyphthalamide (PPA), a silicon (Si), a metal material, a photo sensitive glass (PSG), a sapphire (Al ₂ O ₃ ), a printed circuit board Can be formed. For example, the body 210 may be made of a resin material such as polyphthalamide (PPA), epoxy, or silicone. A filler, which is a metal oxide such as TiO ₂ or SiO ₂ , may be added to the epoxy or silicon material used as the body 210 to enhance the reflection efficiency. The body 210 may include a ceramic material. As another example, the body 210 may include a circuit board, and may include at least one of a resin substrate, a metal core PCB, and a ceramic substrate. The body 210 may be formed of a dark color or a black color to improve contrast, but the present invention is not limited thereto.

The body 210 includes a recess 260 having a predetermined depth. The concave portion 260 may be formed in a concave cup shape, a cavity structure, or a recessed shape from the top surface 25 of the body 210, but the present invention is not limited thereto. The sidewalls of the recess 260 may be perpendicular or inclined with respect to the bottom, and two or more of the sidewalls may be inclined at the same angle or at different angles. A reflective layer of another material may be further disposed on the surface of the concave portion 260, but the present invention is not limited thereto.

The shape of the body 210 may be a polygonal shape such as a triangle, a rectangle, or a pentagon, a shape having a circular shape, an elliptical shape, a curved shape, or a polygonal shape having a curved edge, Do not.

The outer surface of the body 210 may be formed as a vertical or inclined surface with respect to the lower surface of the body 210. The length Y5 of the body 210 may be different from the width X5. For example, the length Y5 may be two times or more, for example, three times or more of the width X5, May be shorter than the length Y6. The longitudinal direction of the body 210 is orthogonal to the width direction. In the light emitting device 173, a plurality of light emitting chips 271 and 272 may be arranged in the longitudinal direction.

A plurality of light emitting chips 271 and 272 may be arranged in the light emitting device 173 at predetermined intervals in the longitudinal direction. The light emitting element 173 may have the light emitting chips 271 and 272 disposed on the respective lead frames 221 and 231 on the side of heat dissipation, or a plurality of light emitting chips may be disposed on one lead frame. Further, by arranging the light emitting element 173 longer than the width, the heat radiation efficiency of each light emitting chip 271, 272 can be improved, the size of the light emitting chip 271, 272 can be increased, can do.

A plurality of lead frames 221 and 231 are disposed in the concave portion 260 of the body 210. The plurality of lead frames 221 and 231 include at least two or three or more metal frames, and may include first and second lead frames 221 and 231, for example. The first and second lead frames 221 and 231 can be separated by the gap portion 219.

One or a plurality of light emitting chips 271 and 272 may be disposed in the concave portion 260. The plurality of light emitting chips 271 and 272 may include at least two or three or more LED chips, and may include first and second light emitting chips 271 and 272, for example. One or a plurality of light emitting chips 271 and 272 may be disposed on at least one of the plurality of lead frames 221 and 231. For example, at least one light emitting chip 271 and 272 may be disposed on each of the plurality of lead frames 221 and 231 . The plurality of light emitting chips 271 and 272 may be selectively connected to the plurality of lead frames 221 and 231. Each of the light emitting chips 271 and 272 may be defined as a light source.

At least one of the plurality of lead frames 221 and 231 may include a cavity having a lower depth than the bottom of the recess 260. The first lead frame 221 includes a first cavity 225 and the first cavity 225 is recessed to a depth lower than the bottom of the concave portion 260. The first cavity 225 may have a concave shape such as a cup shape or a recess shape from the bottom of the concave portion 260 in the bottom direction of the body 210. The first cavity 225 may be formed by bending or etching the first lead frame 221, but the present invention is not limited thereto.

The sidewall and bottom of the first cavity 225 are formed by the first lead frame 221 and the peripheral sidewall of the first cavity 225 may be formed obliquely from the bottom of the first cavity 225 have. Two opposing sidewalls of the sidewalls of the first cavity 225 may be inclined at the same angle or inclined at different angles. The frame thickness of the sidewalls and bottom of the first cavity 225 may be the same as the thickness of the first lead frame 221.

The second lead frame 231 includes a second cavity 235 and the second cavity 235 is recessed to a lower depth than the bottom of the cavity 260. The second cavity 235 may have a concave shape such as a cup structure or a recess in the bottom surface of the body 210 from the top surface of the second lead frame 231 or the bottom of the concave portion 260, and a recess shape. The second cavity 235 may be formed by bending or etching the second lead frame 231, but the present invention is not limited thereto. The bottom and sidewalls of the second cavity 235 may be formed by the second lead frame 231 and the sidewalls of the second cavity 235 may be formed obliquely from the bottom of the second cavity 235 . The corresponding two sidewalls of the sidewalls of the second cavity 235 may be inclined at the same angle or inclined at different angles. The frame thickness of the sidewalls and bottom of the second cavity 235 may be the same as the thickness of the second lead frame 231.

The bottom shapes of the first cavity 225 and the second cavity 235 may be a polygonal shape, a polygonal shape having a partial curved surface, a circle or an elliptical shape, but are not limited thereto.

A bottom surface of the first lead frame 221 and a surface of the second lead frame 231 are exposed to the lower portion of the body 210 and may be disposed on the same plane as the lower surface of the body 210, have. The lower surfaces of the first and second lead frames 221 and 231 include opposite sides of the bottom surfaces of the first and second cavities 225 and 135. The opposite sides of the first and second cavities 225 and 135 may be exposed on the lower surface of the body 210.

The first lead frame 221 includes a first lead portion 223 and the first lead portion 223 may protrude from the outer side of the body 210. The second lead frame 231 may include a second lead portion 233 and the second lead portion 233 may protrude from the outer side of the body 210. One or a plurality of the first lead portions 223 may protrude, and one or a plurality of the second lead portions 233 may protrude. The first and second lead portions 223 and 233 may protrude in opposite directions with respect to the concave portion 260.

The first lead frame 221 and the second lead frame 231 may be formed of a metal material such as Ti, Cu, Ni, Au, Cr, And may include at least one of tantalum (Ta), platinum (Pt), tin (Sn), silver (Ag), and phosphorous (P). The thickness of the first and second lead frames 221 and 231 may be 0.15 mm or more, for example, 0.18 mm to 1.5 mm. If the thickness of the first and second lead frames 221 and 231 is less than 0.15 mm, injection molding is difficult. When the thickness of the first and second lead frames 221 and 233 exceeds 1.5 mm, the thickness and the size of the light emitting device 173 may be increased and the material cost may be increased. If the thickness of the first and second lead frames 221 and 231 is less than 0.15 mm, the electrical characteristics and the heat dissipation characteristics may be deteriorated.

The first and second lead frames 221 and 231 may have the same thickness, but the present invention is not limited thereto. The first and second lead frames 221 and 231 function as a lead frame for supplying power. In addition to the first and second lead frames 221 and 231, a metal frame for radiating heat or an intermediate frame for electrically connecting between the first and second lead frames 221 and 231 may be further disposed in the recess 260, It is not limited thereto.

A first light emitting chip 271 is disposed in the first cavity 225 of the first lead frame 221. The first light emitting chip 271 is bonded to the first cavity 225 with an adhesive But it is not limited thereto. A second light emitting chip 272 is disposed in the second cavity 235 of the second lead frame 231. For example, the second light emitting chip 272 is bonded to the second cavity 235 with an adhesive But it is not limited thereto. The adhesive may be an insulating adhesive or a conductive adhesive. The insulating adhesive may include a material such as epoxy or silicone, and the conductive adhesive may include a bonding material such as solder.

The first and second light emitting chips 271 and 272 can selectively emit light in the range of visible light band to ultraviolet light band. For example, ultraviolet LED chip, red LED chip, blue LED chip, green LED chip, yellow green ) LED chips, and white LED chips. The first and second light emitting chips 271 and 272 include an LED chip including at least one of a compound semiconductor of group III-V elements and a compound semiconductor of group II-VII elements. The first and second light emitting chips 271 and 272 may be a horizontal chip structure in which two electrodes in the chip are arranged adjacent to each other or may be arranged as vertical chips disposed on opposite sides of the chip. When the light emitting chips 271 and 272 are horizontal chips, the lower insulating substrate may be bonded to the lead frame with an insulating or conductive adhesive. Alternatively, when the light emitting chips 271 and 272 are vertical chips, the lower electrode of the vertical chip may be electrically connected to the lead frame by a conductive adhesive.

The first light emitting chip 271 is connected to the first lead frame 221 disposed at the bottom of the concave portion 260 by the first wire 273 and the second lead frame 221 is connected to the second lead frame 274 by the second wire 274. [ 231, but it is not limited thereto. The second light emitting chip 272 may be connected to the first lead frame 221 by a third wire 275 and may be connected to the second lead 272 by a fourth wire 276, Frame 231, but it is not limited thereto.

The light emitting element 173 may include a protection element. The protection element may be disposed on a part of the first lead frame 221 or the second lead frame 231. The protection element may be disposed within the body 210. The protection device may be implemented with a thyristor, a Zener device, or a TVS (Transient voltage suppression), and the Zener device protects the light emitting chips 271 and 272 from electrostatic discharge (ESD). The protection element may be connected in parallel to the connection circuit of the first light emitting chip 271 and the second light emitting chip 272.

The molding member 281 may be formed on at least one or both of the concave portion 260, the first cavity 225, and the second cavity 235. The molding member 281 includes a light-transmitting resin layer such as silicon or epoxy, and may be formed as a single layer or a multilayer. At least one kind of fluorescent substance may be added to the molding member 281.

The surface of the molding member 281 may be formed in a flat shape, a concave shape, a convex shape, or the like, but is not limited thereto.

The light emitting device 173 may be a blue light emitting device or a white light emitting device having a high color rendering index (CRI). The light emitting device 173 may be a light emitting device that emits white light by molding a synthetic resin containing a phosphor on a blue light emitting chip. Here, the phosphor may include at least one of a garnet (YAG, TAG), a silicate, a nitride, and an oxynitride.

The phosphor may include at least one or more of a blue phosphor, a cyan phosphor, a green phosphor, a yellow phosphor, and a red phosphor, and may be disposed in a single layer or in multiple layers. In the fluorescent film, a phosphor is added in the light transmitting resin material. The light transmitting resin material may include a material such as silicon or epoxy, and the phosphor may be selectively formed from YAG, TAG, Silicate, Nitride, and Oxy-nitride materials. The resin layer 260 may include a fluorescent material such as a quantum dot. The quantum dot may include an II-VI compound or a III-V compound semiconductor, and may include at least one of red, green, yellow, and red quantum dots or different types. The quantum dot is a nanometer sized particle that can have optical properties resulting from quantum confinement. The specific composition (s), structure and / or size of the quantum dots can be selected so that light of a desired wavelength is emitted from the quantum dots upon excitation with a specific excitation source. By changing the size, the quantum dots can be adjusted to emit light throughout the visible spectrum. The quantum dot may include one or more semiconductor materials, and examples of the semiconductor material include a Group IV element, a Group II-VI compound, a Group II-V compound, a Group III-VI compound, a Group III- VI compound, an I-III-VI compound, a II-IV-VI compound, a II-IV-V compound, an alloy comprising any of the above, and / or a tertiary and quaternary mixture or alloy , And mixtures of any of the foregoing. The quantum dot is, for example, ZnS, ZnSe, ZnTe, CdS , CdSe, CdTe, GaN, GaP, GaAs, GaSb, InP, InAs, InSb, AlS, AlP, AlAs, PbS, PbSe, Ge, Si, CuInS 2, CuInSe 2 , MgS, MgSe, MgTe, and the like, and combinations thereof.

The features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100, 173: light emitting element 300: optical lens
302, 304: bottom surface 310: first incident surface
312: second incident surface 314: third incident surface
315: recesses 332, 334:
340: first emitting surface 342: second emitting surface
344: third emitting surface 171, 400: circuit board

Claims (15)

A recessed recess from the bottom surface at the bottom of the transparent body;
A plurality of incident surfaces having a first incident surface on the upper surface of the recess, a second incident surface and a third incident surface corresponding to both sides of the recess;
A first total reflection plane and a second total reflection plane disposed on opposite sides of the body; And
A first exit surface on an upper center of the body, a second exit surface on both sides of the first exit surface, and a third exit surface,
Wherein the first emitting surface has a convex curved surface,
The second exit surface has a convex curved surface,
And the third exit surface has a concave curved surface. [2] The apparatus of claim 1, wherein the first incident surface has an asymmetric shape with respect to a central axis perpendicular to a bottom center of the recess,
Wherein the second incident surface and the third incident surface have an asymmetric shape with respect to the central axis. [3] The apparatus according to claim 2, wherein the first emitting surface has an asymmetric shape with respect to a central axis perpendicular to the bottom center of the recess,
And the second exit surface and the third exit surface have an asymmetric shape with respect to the central axis. 4. The optical element according to any one of claims 1 to 3, wherein the first incident surface has a convex curved surface in the recess bottom direction,
And the second and third incident surfaces have a concave curved surface. The optical lens according to any one of claims 1 to 3, wherein the center of the first exit surface is spaced from a central axis perpendicular to the bottom center of the recess. 4. The optical pickup device according to any one of claims 1 to 3, wherein a boundary point between the first incident surface and the second incident surface is an optical surface having an optical axis higher than a boundary point between the first incident surface and the third incident surface lens. The optical lens according to claim 5, wherein a boundary point between the first exit surface and the second exit surface is disposed higher than a boundary point between the first exit surface and the third exit surface. A housing having an open area therein;
An optical member in an open region of the housing;
A light emitting module having a plurality of light emitting elements on the housing and a circuit board on which the plurality of light emitting elements are arranged;
An optical lens on the light output side of the light emitting module;
And an upper cover on the optical lens,
Wherein the optical lens comprises:
A recess in the lower portion of the transparent body, the recess being concave from the bottom surface and having a length greater than the width in the first axial direction;
A plurality of incident surfaces having a first incident surface on the upper surface of the recess, a second incident surface and a third incident surface corresponding to both sides of the recess;
A first total reflection plane and a second total reflection plane disposed on opposite sides of the body; And
A first exit surface on an upper center of the body, a second exit surface on both sides of the first exit surface, and a third exit surface,
Wherein the first emitting surface has a convex curved surface,
The second exit surface has a convex curved surface,
And the third exit surface has a concave curved surface. The optical device according to claim 8, wherein the optical member is circular,
Wherein the optical lens is formed of a curved surface having a curvature. 10. The illuminating device according to claim 9, wherein the optical lens irradiates light emitted to the first, second and third emission surfaces to different areas of the upper cover. 11. The lighting apparatus of claim 10, wherein the top cover comprises a reflective material. The lighting device according to claim 10, further comprising a heat dissipation frame behind the light emitting module. 11. The light emitting device according to claim 10, wherein the first incident surface and the first exit surface have an asymmetric shape with respect to a central axis perpendicular to the bottom center of the recess,
Wherein the second incident surface and the third incident surface have an asymmetrical shape with respect to the central axis,
Wherein the second exit surface and the third exit surface have an asymmetrical shape with respect to the central axis. 14. The light-emitting device according to claim 13, wherein the first incident surface has a convex curved surface toward the recessed bottom,
The second and third incident surfaces having a concave curved surface,
And the center of the first exit surface is spaced from a central axis perpendicular to the bottom center of the recess. 14. The apparatus of claim 13, wherein a boundary point between the first incident surface and the second incident surface is disposed higher than a boundary point between the first incident surface and the third incident surface,
And a boundary point between the first exit surface and the second exit surface is disposed higher than a boundary point between the first exit surface and the third exit surface.

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