KR20150094550A - Side emitting light emitting diode lens - Google Patents

Abstract

The present invention relates to a side emitting-type LED lens which laterally emits lights emitted from LEDs. The side emitting-type LED lens, according to one embodiment of the present invention, comprises: a base surface provided with an incidence plane on which lights emitted from LEDs are incident; an upper surface for totally reflecting a direct incident light among the lights incident on the incidence plane; a lateral surface from which the light totally reflected on the upper surface and the direct incident light among the lights incident on the incidence plane are emitted; and a corrosion surface formed on the lateral surface, wherein the corrosion surface is capable of being formed in a partial area from at least two areas formed on the lateral surface in a vertical direction.

Description

SIDE EMITTING LIGHT EMITTING DIODE LENS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side-emitting type LED lens that emits light emitted from an LED to a side surface.

2. Description of the Related Art Generally, a liquid crystal display (LCD) is provided in a display device used for a computer monitor or a TV. However, such a liquid crystal display device requires a separate light source because it can not emit light by itself .

As a light source for a liquid crystal display device, a plurality of fluorescent lamps such as CCFL (Cold Cathode Fluorescent Lamp) and EEFL (External Electrode Fluorescent Lamp) may be used, or a plurality of LEDs may be used. The light source is provided in a backlight unit (BLU) together with a light guide plate, a plurality of optical sheets, and a reflection plate.

In recent years, LEDs among these light sources have been attracting attention as a next generation light source because they have low power consumption, good durability, and low manufacturing cost. However, when an LED is used as a light source, light tends to concentrate and diverge into a narrow area. In order to apply the LED to a surface light source such as a display device, it is necessary to distribute light evenly over a wide area.

Accordingly, researches on an LED lens that performs such a function are being actively carried out in recent years, and a representative example of the LED lens is a side-emitting type LED lens that emits light emitted from the LED to the side.

A side-emitting type light emitting diode lens, a backlight unit and a display device having the side emitting type light emitting diode (hereinafter referred to as "prior art "Quot;) is started.

However, in the case of a conventional display device having a lens according to the related art, the edge portion of the display panel, that is, the edge portion of the display panel, There is a problem of brightening.

Further, in the case of a display device having a lens according to the related art, there is a problem that a color deviation occurs between the edge portion and the center portion of the display panel.

DISCLOSURE OF THE INVENTION The present invention has been made in order to solve the problems of the conventional side-emitting type LED according to the prior art (Korean Patent No. 10-1299528), and the phenomenon that the edge portion of the display panel becomes brighter as compared with the center portion, Emitting type LED lens capable of improving the color deviation caused by the light emitted from the light source.

A lens for a side emitting type LED according to an embodiment of the present invention includes a bottom surface having an incident surface on which light emitted from the LED is incident; An upper surface that totally reflects incident light directly incident on the incident surface; A side surface through which light incident directly on the incidence surface and light totally reflected on the upper surface emerge; And a corrosion surface formed on the side surface, wherein the corrosion surface may be formed in a part of at least two areas divided perpendicularly to the side surface.

This makes it possible to improve the phenomenon that the edge portion on the display panel of the display device provided with the lens according to the present invention is brighter than the center portion and to improve the color distribution of the light emitted to the side surface, Can be improved.

In the lens for LED according to an embodiment of the present invention, the at least two areas are divided into a first area, a second area, a third area and a fourth area sequentially from the upper side of the side surface, The corrosion surface may be formed in the first region and the second region, or may be formed in any one of the first region and the second region and in any one of the third region and the fourth region. have.

In addition, a lens for an LED according to an embodiment of the present invention includes a bottom surface having an incident surface on which light emitted from the LED is incident; An upper surface that totally reflects incident light directly incident on the incident surface; A side surface through which light incident directly on the incidence surface and light totally reflected on the upper surface emerge; A connecting surface connecting the upper surface and the side surface; And a corrosion surface formed on the connection surface.

Thus, it is possible to smoothly manufacture the lens according to the present invention, and to prevent the problem caused by the connection surface, that is, the bright portion of the lens on the panel from being illuminated.

The lens for the side-emitting type LED according to the present invention can selectively improve the phenomenon that the edge portion of the display sub-panel is brighter than the center portion by selectively forming the erosion surface on a part of the plurality of regions divided in the vertical direction on the side surface At the same time, the color deviation phenomenon occurring between the edge portion and the center portion is also improved.

In addition, the lens for the side-emitting type LED according to the present invention has a connecting surface for connecting the upper surface and the side surface so that the manufacturing can be smoothly performed, and a corrosion surface is formed on the connecting surface, It is possible to prevent the phenomenon that the upper portion becomes brighter as compared with the surroundings.

The effects according to the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims and the detailed description It will be possible.

1 is a vertical sectional view showing a side-emitting LED lens according to the present invention,
FIGS. 2 and 3 are views for explaining the effect that the lens according to the present invention can reduce the total volume by the configuration of the central region and the peripheral region of the incident surface, and FIG.
FIG. 4 is a chart showing the result of measurement of the color distribution of light emitted to the side in accordance with the change in the area of the formation of the corrosion surface, FIGS. 5 to 9 are views showing various embodiments of the formation area of the corrosion surface,
10 is a vertical sectional view showing a side-emitting LED lens according to another embodiment of the present invention,
Fig. 11 is a view showing the light distribution on the reflection sheet in the display device provided with the lens according to the present embodiment, and Fig. 12 is a diagram showing the light distribution on the panel of the display device.
13 is a plan view schematically showing a state where a corrosion surface is formed on a connection surface,
FIG. 14 is a view showing a light distribution on a reflection sheet in a display device provided with a lens having a corrosion surface on a connection surface, and FIG. 15 is a diagram showing a light distribution on a panel of the display device.

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

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the intention is not to limit the invention to the particular forms disclosed and that the embodiments of the invention are provided so that this disclosure may be more fully understood by those skilled in the art, And all changes, equivalents, and alternatives falling within the spirit and scope of the invention. In the accompanying drawings, thickness and size may be exaggerated for clarity of description, and the present invention is not limited by the relative size or thickness shown in the accompanying drawings.

Also, the terms used in the present application are used only to describe certain embodiments and are not intended to limit the present invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be construed to have meanings consistent with the contextual meanings of the related art and are not to be construed as ideal or overly formal meanings as are expressly defined in the present application .

1 is a vertical cross-sectional view illustrating a side-emitting LED lens according to an embodiment of the present invention.

1, a light emitting diode (LED) lens 10 according to an exemplary embodiment of the present invention includes a bottom surface 20, an upper surface 30, a bottom surface 20, and an upper surface 30 (Not shown). The lens 10 according to the present invention may further include a leg 50 extending downward from a predetermined position of the bottom surface 20 to support the lens 10.

The bottom surface 20 is provided with an incident surface 100 on which light emitted from the LED 11 is incident and the incident surface 100 may be formed on the inner surface of the groove 21 formed in the center of the bottom surface 20.

The incident surface 100 includes an upper incidence surface 110 and a lower incidence surface 110. The upper incidence surface 110 inclines the light L1 and L2 diverging within a predetermined angle range with respect to the optical axis 12 among the light emitted from the LED 11, And a side incidence surface 120 that allows light L3 other than light incident on the upper incidence surface 110 of the light emitted from the LED 11 to enter the side surface 40. [

The upper incidence plane 110 includes a central region 112 that includes the optical axis 12 of the LED 11 and refracts light emitted from the LED 11 in a direction away from the optical axis 12 to enter the upper face 30 And a peripheral region 114 connected to the central region 112 and refracting light emitted from the LED 11 in a direction toward the optical axis 12 and causing the light to be incident on the top surface 30. [

The center region 112 is a portion of the light emitted from the LED 11 in the vicinity of the optical axis 12, that is, the light L1 diverging toward the central portion of the upper incident surface 110 in a direction away from the optical axis 12 And the peripheral region 114 allows the light L2 emitted from the LED 11 to the periphery of the upper incident surface 110 to be incident on the upper surface 30, And incident on the upper surface 30. The side incident face 120 connects the peripheral region 114 and the bottom face 20 and refracts light L3 other than light incident on the upper incident face 110 to enter the side face 40. [

The LED 10 according to the present invention having such a structure can reduce the height H of the lens 10 by the central region 112 and reduce the width H of the lens 10 by the peripheral region 114. [ (W) can be reduced. A detailed description thereof will be described later.

The upper surface 30 is symmetrical with respect to the optical axis 12 of the LED 11 and is incident on the upper incident surface 110 of the incident surface 100 and then refracted to be incident directly onto the upper surface 30 L1 and L2 are optically totally reflected by the side surface 40. The side surface 40 is formed by totally reflecting light from the top surface 30 and light incident on the side incident surface 120 and then refracted and directly incident on the side surface 40 ) To the outside of the lens (10).

The side surface 40 may have a shape inclined by a predetermined angle? As it goes downward. For example, the side surface 40 may be formed as an inclined surface inclined at a constant inclination toward the upper side with respect to the optical axis 12 of the LED 11, or may be curved downwardly.

The lens 10 for LED according to the present invention is a transparent material having excellent transmittance such as glass, acrylic resin, polymethylmethacrylate (PMMA), polycarbonate (PC), and polyethyleneterephthalate It can be made in one-body.

Hereinafter, with reference to FIGS. 2 and 3, the effect of reducing the total volume of the lens according to the present invention by the configuration of the central region and the peripheral region of the incident surface will be described.

Fig. 2 is a diagram for explaining the configuration and action of the center region. 2, the central region 112 of the incident surface 100 emits light L1 that is emitted near the optical axis 12 of the LED 11, that is, a light that diverges to the center of the upper incident plane 110 The light L1 is refracted in the direction away from the optical axis 12 and incident on the upper surface 30. When the light L1 is incident on the upper surface 30, And therefore the upward slope of the top surface 30 for total reflection of such light L1 can be made small. The center region 112 is formed so as to be directed downward as it is further away from the optical axis 12 in order to refract the light L1 incident at an arbitrary point P4 on the central region 112 in the direction away from the optical axis 12. [ The intersection P5 of the central region 112 and the peripheral region 114 is the lowest end of the central region 112. In this case,

For example, as shown in the figure, the central region 112 may be a curved line having a peak point in the vertical section on the optical axis 12, and in another embodiment may be a straight line inclined downwardly at a predetermined angle, Or may be formed in a convex shape. In addition, there may be an inflection point P6 on the central region 112 so that the central region 112 may be in the form of a smooth curve at the intersection P5.

3 is a diagram for explaining the configuration and operation of the peripheral region. 3, when the peripheral region 114 of the incident surface 100 receives the light L2 incident at an arbitrary point P7 on the peripheral region 114 in a direction approaching the optical axis 12 The light L2 is made closer to the optical axis 12 when it is incident on the upper surface 30 so that the width (or radius) of the lens 10 is reduced correspondingly . Particularly, a point at which the light L8 incident on the edge end point P8 of the peripheral region 114 is refracted at the end point P8 and is incident on the upper surface 30 corresponds to the upper surface 30 of the lens 10 according to the present invention As shown in the figure, when the peripheral region 114 refracts the light L8 in the direction of the optical axis 12, the corner end point of the top surface 30 is shifted from P9 'to P9 The width of the lens 10 can be reduced by approximately W. [ The more the light L2 incident on the arbitrary point P7 of the peripheral region 114 is refracted in the direction toward the optical axis 12, the more the width of the lens 10 is further reduced In particular, as the refraction angle increases toward the edge of the peripheral region 114, the width of the lens 10 can be directly reduced.

The peripheral region 114 is formed so as to refract light L2 incident at an arbitrary point P7 on the central region 114 in the direction toward the optical axis 12, The intersection P5 between the central region 112 and the peripheral region 114 is the lowest end of the central region 112 and the peripheral region 112 is inclined toward the optical axis 12. In this case, (114). That is, the intersection point P5 is the lowermost end of the upper incident surface 110.

For example, as shown in the figure, the peripheral region 114 may be curved upwardly away from the optical axis 12 in the vertical cross-section, and in another embodiment may have a straight or downwardly convex shape . Further, the peripheral region 114 may have a shape in which the slope of the tangent line increases toward the edge, and if the slope of the tangential line toward the edge of the peripheral region 114 increases, The refraction angle in the direction of the optical axis 12 at the end point P8 of the peripheral region 114 is maximized and therefore the width of the lens 10 can be directly reduced most greatly.

Meanwhile, the LED lens 10 according to the present invention further includes a corrosion surface 200 formed on the side surface 40.

The corrosion surface 200 may be formed by a corrosion treatment. The corrosion treatment may be formed by chemical corrosion on a mold core used for injection molding of the lens 10, or by applying sanding corrosion.

When the erosion surface 200 is formed on the side surface 40 as described above, the light emitted to the side surface 40 is scattered by the erosion surface 200, thereby improving the phenomenon that the edge portion of the display panel, that is, can do.

However, when the corrosion surface 200 is formed on the entire side surface 40, the phenomenon that the edge portion of the panel becomes brighter than the center portion can be remarkably reduced, but the light uniformity at the central portion is deteriorated.

This is because the lens 10 according to the present invention has a distribution of light that emits light from the LED 11 to the side 40 (e.g., the angle of light emitted to the side 40, And the amount of light emitted to the bottom), the overall size of the display panel, the number of lenses 10 provided in the display device, and the OD (optical distance) distance. Here, the OD distance is a distance at which the light emitted from the LED 11 reaches the display panel, which is an important factor for determining the thickness of the display device. Generally, the OD distance is determined by a reflector provided at a lower portion of the display device, The distance to the diffuser provided.

In addition, even if the lens 10 according to the present invention emits light emitted from the LED 11 to the side surface 40, not all light is illuminated only to the edge portion of the display panel, and a plurality of LEDs Even if the lens 10 according to the present invention emits the light emitted from the LED 11 to the side surface 40 because the reflective sheet is provided on the lower part of the display device and the diffuser is provided on the upper part of the display device, And the diffuser can uniformly illuminate the light on the display panel.

Therefore, in order to minimize the influence of the edge of the panel on the uniformity of light at the central portion while improving the brightness of the edge portion of the panel, the corrosion surface 200 is divided into at least two regions in the vertical direction of the side surface 40 It is preferable to selectively form a part of the region.

In addition, when the corrosion surface 200 is selectively formed in a partial area of the side surface 40, it is possible to improve the phenomenon that the edge portion of the display sub-panel is brighter than the center portion, The deviation phenomenon can be also improved. Hereinafter, this will be described in detail.

FIG. 4 is a chart showing the result of measurement of the color distribution of light emitted to the side in accordance with the change of the formation surface of the corrosion area, and FIGS. 5 to 9 are views showing various embodiments of the formation area of the corrosion surface.

4 to 9, in the present embodiment, the at least two regions are sequentially formed from the top of the side surface 40 to the bottom of the first region 42, the second region 43, (45) and the fourth region (47).

In the present embodiment, the measurement of the color distribution of light emitted to the side surface 40 is performed in the case where the corrosion surface 200 is not formed at all on the side surface 40 (A) (C, FIG. 6) formed only in the first region 42 and the fourth region 47, the first region 42 and the third region 45 (FIG. 6) Only the second region 43 and the third region 45 are formed only in the second region 43 and the fourth region 47 (E in Fig. 8) (F, FIG. 9), and the measurement results are shown in the table below.

domain Y B B / Y A


The first region 378 197 0.521164 The second region 372 190 0.510753 The third region 378 178 0.470899 The fourth zone 456 160 0.350877 B


The first region 425 255 0.6 The second region 404 248 0.613861 The third region 384 237 0.617188 The fourth zone 344 210 0.610465 C


The first region 432 255 0.590278 The second region 401 247 0.61596 The third region 378 241 0.637566 The fourth zone 376 235 0.625 D


The first region 454 255 0.561674 The second region 416 247 0.59375 The third region 412 244 0.592233 The fourth zone 398 226 0.567839 E


The first region 409 232 0.567237 The second region 411 232 0.564477 The third region 407 227 0.55774 The fourth zone 454 230 0.506608 F


The first region 434 234 0.539171 The second region 431 238 0.552204 The third region 422 224 0.530806 The fourth zone 451 213 0.472284

In Table 1, the B value is the amount of light of the blue wavelength in each region, the Y value is the light quantity value of the yellow wavelength, and the B / Y value is the Y value divided by the B value.

4 is a chart showing the results measured in Table 1. In FIG. 4, the X-axis represents each region and the Y-axis represents the B / Y value. Therefore, the lower the value of B / Y, the stronger the yellow.

As shown in FIG. 4, it can be seen that the color deviation of the lens 10 according to the present invention is large if the side surface 40 is not provided with the corrosion surface 200. yellow shows a tendency to be strong.

On the other hand, in the case where the corrosion surface 200 is formed only in a part of the first to fourth regions of the side surface 40, as in the case of B to F, the color distribution of the light emitted to the side surface 40 is generally uniform So that the color deviation occurring between the edge portion and the center portion on the panel can be improved.

Although not shown in the drawing, the color distribution of light emitted to the side surface 40 can be made uniform even when the corrosion surface 200 is formed on all the first to fourth regions, that is, on the entire side surface 40 However, as described above, there arises a problem that the light uniformity at the central portion of the panel deteriorates, which is not preferable in view of the overall light distribution of the panel.

Also, unlike the case of B, even when the erosion surface 200 is formed only in the third region 45 and the fourth region 47, the color distribution of light emitted to the side surface 40 can be made uniform, In this case, there is a limit in improving the phenomenon that the edge portion on the panel becomes brighter than the center portion. In the lens 10 according to the present invention, the light emitted from the LED 11 is totally reflected on the upper surface 30 and emitted to the side surface 40, The corrosive surface 200 is formed only in the third region 45 and the fourth region 47 because the light is emitted to the outside of the lens 10 through the first region 42 and the second region 43 of the first region 40 There is a limit in improving the phenomenon that the edge portion on the panel becomes brighter than the center portion.

Thus, in the lens 10 according to the present invention, the erosion surface 200 may be formed in the first region 42 and the second region 43, or between the first region 42 and the second region 43 It is preferable that the first region 47 is formed in any one of the third region 45 and the fourth region 47.

10 is a vertical sectional view showing a side-emitting LED lens according to another embodiment of the present invention.

The LED lens 10 according to the present embodiment further includes a connecting surface 70 connecting the upper surface 30 and the side surface 40 in comparison with the above embodiment.

The connection surface 70 may be formed in a substantially flat shape. When the substantially flat connection surface 70 is provided, the lens 10 can be manufactured smoothly.

The top surface 30 of the lens 10 according to the present invention is configured to totally reflect the incident light to the side surface 40 so that when the top surface 30 is directly connected to the side surface 40, This causes a large number of defects in the lens 10 during injection molding.

However, as in the present embodiment, when the connecting surface 70, which is formed in a substantially flat shape, is interposed between the upper surface 30 and the side surface 40, it is possible to prevent the connecting portion from becoming sharp, So that the production can be smooth.

However, as in the present embodiment, when the substantially flat connecting surface 70 connecting the top surface 30 and the side surface 40 is formed, the light incident on the connecting surface 70 is totally reflected by the side surface 40, The light distribution on the display panel is adversely affected, which will be described in detail.

Fig. 11 is a view showing the light distribution on the reflection sheet in the display device provided with the lens according to the present embodiment, and Fig. 12 is a diagram showing the light distribution on the panel of the display device.

11, it can be seen that the light distribution on the reflective sheet produces a circular bright band 72 around the immediate vicinity of the lens 10 according to the present embodiment, Incident light is reflected by the reflective sheet without being totally reflected, and is directly incident on the upper portion of the lens 10 on the panel.

As shown in FIG. 12, it can be seen that the light distribution on the panel is uneven by the circular light band 72, and the lens top 74 is brighter than the surroundings.

This is because the circular light band 72 generated on the reflecting sheet by the connecting surface 70 is reflected by the connecting surface 70 and enters the reflecting sheet in a substantially vertical state, And is incident vertically on the lens upper portion 74 on the panel.

Therefore, in the case of further including the connecting surface 70 connecting the upper surface 30 and the side surface 40, as in the lens 10 according to the present embodiment, It is necessary to solve the problem, and as shown in FIG. 13, the lens 10 according to the present embodiment can solve such a problem by forming the corrosion surface 200 on the connection surface 70.

FIG. 14 is a view showing a light distribution on a reflection sheet in a display device provided with a lens having a corrosion surface on a connection surface, and FIG. 15 is a diagram showing a light distribution on a panel of the display device.

It can be seen that the circular light band 72 in FIG. 11 generated immediately adjacent to the lens 10 is removed by the corrosion surface 200 formed on the connection surface 70 as shown in FIG. 14, Accordingly, it can be seen that the light distribution on the panel is uniform as shown in FIG.

That is, the lens 10 according to the present invention further includes a substantially flat connection surface 70 connecting the top surface 30 and the side surface 40, and the connection surface 70 has a corrosion surface 200 It is possible to smoothly manufacture the lens 10 and to prevent the problem caused by the connection surface 70, that is, the phenomenon that the lens upper portion 74 on the panel is illuminated brightly.

On the other hand, as shown in FIG. 11, it can be seen that light circles on the reflection sheet generate light circles of different circular shapes around the circular bright band 72 generated by the connecting surface 70, As shown in Figs. 12 and 15, the light distribution effect on the panel by the other round bright bands is compared with the circular bright bands 72 generated immediately adjacent to the lens 10 by the connecting surface 70 This is because the light beams that generate the other circular light bands are not incident at a large angle of incidence on the reflection sheet and spread widely when they are reflected back to the panel.

As described above, the present invention is to solve the problem of the side-emitting type LED according to the prior art (Korean Patent No. 10-1299528). The present invention relates to a phenomenon in which the edge portion of the display panel becomes brighter The present invention relates to a side-emitting type LED lens capable of improving color deviation occurring between an edge portion and a center portion, and the embodiments can be modified in various forms. Accordingly, the present invention is not limited to the embodiments disclosed herein, and all changes which can be made by those skilled in the art are also within the scope of the present invention.

10: lens 11: LED (or LED)
12: optical axis 20: bottom surface
21: groove portion 30: upper surface
40: side 50: leg
70: connecting surface
100: incidence plane 110: upper incidence plane
112: center area 114: peripheral area
120: side incidence plane 200: corroded surface

Claims (7)

A side-emitting type LED lens for emitting light emitted from a light emitting diode (LED)
A bottom surface having an incident surface on which light emitted from the LED is incident;
An upper surface that totally reflects incident light directly incident on the incident surface;
A side surface through which light incident directly on the incidence surface and light totally reflected on the upper surface emerge; And
And a corrosion surface formed on the side surface,
Wherein the corrosion surface is formed in a part of at least two areas divided perpendicularly to the side surface. The method according to claim 1,
Wherein the at least two regions are divided into a first region, a second region, a third region and a fourth region sequentially from the upper side of the side face,
Wherein the corrosion surface is formed in the first region and the second region. The method according to claim 1,
Wherein the at least two regions are divided into a first region, a second region, a third region and a fourth region sequentially from the upper side of the side face,
Wherein the corrosion surface is formed in any one of the first region, the second region, and the third region and the fourth region. The method according to claim 1,
Wherein the lens further comprises a connecting surface connecting the upper surface and the side surface,
And the corrosion surface is further formed on the connection surface. A side-emitting type LED lens for emitting light emitted from a light emitting diode (LED)
A bottom surface having an incident surface on which light emitted from the LED is incident;
An upper surface that totally reflects incident light directly incident on the incident surface;
A side surface through which light incident directly on the incidence surface and light totally reflected on the upper surface emerge;
A connecting surface connecting the upper surface and the side surface; And
And a corrosion surface formed on the connection surface. A bottom surface having an incident surface on which light emitted from the LED is incident; An upper surface that totally reflects incident light directly incident on the incident surface; And a side surface through which light directly incident on the incident surface and totally reflected on the upper surface are emitted, wherein the incident surface has a predetermined angle range with respect to an optical axis of the LED, And a side incidence surface for allowing light, other than light incident on the upper incidence surface, of the light emitted from the LED to enter the side surface, As a result,
Wherein the lens for the side-emitting type LED further comprises a corrosion surface formed on the side surface,
Wherein the corrosion surface is formed in a part of at least two regions formed in the vertical direction on at least two sides of the side surface. A bottom surface having an incident surface on which light emitted from the LED is incident; An upper surface that totally reflects incident light directly incident on the incident surface; And a side surface through which light directly incident on the incident surface and totally reflected on the upper surface are emitted, wherein the incident surface has a predetermined angle range with respect to an optical axis of the LED, And a side incidence surface that allows light from the light emitted from the LED to be incident on the side surface, the light incident on the side surface of the upper incidence surface, the upper incidence surface, A central region including an optical axis of the LED and refracting light emitted from the LED in a direction away from the optical axis so as to reduce the height of the lens and incident on the upper surface; (Or radius) of the light emitting diode to the light emitting diode By refraction in a side emission type LED lenses made of a peripheral region of joining to the upper surface,
Wherein the lens for the side-emitting type LED further comprises a corrosion surface formed on the side surface,
Wherein the corrosion surface is formed in a part of at least two regions formed in the vertical direction on at least two sides of the side surface.

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