KR20130051854A - Member for controlling luminous flux and display device having the same - Google Patents

Abstract

PURPOSE: A flux control member and a display device including thereof are provided to solve the brightness inhomogeneity, in which the light is concentrated in a specific segment, by diffusing and emitting the light from the light source. CONSTITUTION: A flux control member comprises a first refraction side(210), a second refraction side(220), a diffusing unit(230), and a rear side(240). The first refraction side is extended from the outside of a depression unit(100). The second refraction side is formed adjacently in the first refraction side. The second refraction side is extended to the diffusing unit from the rear side. The diffusing unit is formed between the first refraction side and the second refraction side. The diffusing side surrounds an area around an optical axis(OA) of a light emitting diode(20).

Description

Luminous flux control member and a display device including the same {MEMBER FOR CONTROLLING LUMINOUS FLUX AND DISPLAY DEVICE HAVING THE SAME}

Embodiments relate to a light beam control member and a display device including the same.

In general, liquid crystal displays (LCDs) have tended to be gradually widened due to their light weight, thinness, and low power consumption. In accordance with this trend, liquid crystal displays are used in office automation equipment, audio / video equipment, and the like. The liquid crystal display device displays a desired image on a screen by adjusting a transmission amount according to image signals applied to a plurality of control switches arranged in a matrix form.

Since the liquid crystal display device is not a self-luminous display device, a backlight unit is provided to provide light to the rear surface of the liquid crystal display panel on which an image is displayed.

A general liquid crystal display device includes a color filter substrate and an array substrate that are spaced apart from each other to face each other, and a liquid crystal panel including a liquid crystal layer interposed between the color filter substrate and the array substrate and a backlight unit that emits light to the liquid crystal panel. Include.

The backlight unit used in such a liquid crystal display may be generally divided into an edge type backlight unit or a direct type backlight unit.

The edge type backlight unit includes a light guide plate and light emitting diodes. The light emitting diodes are disposed on the side of the light guide plate, and the light guide plate guides the light emitted from the light emitting diode through total reflection or the like and exits toward the liquid crystal panel.

The direct type backlight unit does not use the light guide plate, and the light emitting diodes are disposed on the rear surface of the light guide plate. Accordingly, the light emitting diodes emit light toward the rear side of the liquid crystal panel.

Such a backlight unit should emit light uniformly toward the liquid crystal panel. That is, efforts are being made to improve the luminance uniformity of liquid crystal displays.

Embodiments provide a light flux control member and a display device having improved luminance uniformity and color uniformity.

In one embodiment, a light beam control member includes an incident surface to which light is incident; A first refractive surface on which light incident through the incident surface is emitted; A second refracting surface formed next to the first refracting surface; And a scattering portion between the first and second refractive surfaces.

In one embodiment, a light beam control member includes an incident surface to which light is incident; A depression recessed toward the incident surface; A rear surface extending from the incident surface; And a refractive surface extending from the outer side of the depression to the rear surface, and a scattering pattern is formed on the refractive surface.

A display device according to an embodiment includes a light source; A light flux control member through which light from the light source is incident; And a display panel to which light from the luminous flux control member is incident, wherein the luminous flux control member comprises: a first refractive surface on which light from the light source is emitted; A second refracting surface formed next to the first refracting surface; And a scattering portion between the first and second refractive surfaces.

The light beam control member according to the embodiment includes the scattering unit. The scattering portion emits light by scattering light from the light source between the first refractive surface and the second refractive surface.

Accordingly, the luminous flux control member according to the embodiment can solve the luminance non-uniformity such as dark and bright mura generated by the concentration of light in a specific portion. Further, the light emitting device according to the embodiment can easily eliminate color unevenness such as a yellow ring generated by interference or the like.

1 is an exploded perspective view illustrating a light beam control member, a light emitting diode, and a driving substrate according to an embodiment.
2 is a cross-sectional view showing a cross section of the luminous flux control member according to the embodiment.
3 is a view illustrating a luminous flux of light emitted through a luminous flux control member according to an exemplary embodiment.
4 to 6 are cross-sectional views illustrating modified examples of the light beam control member according to the embodiment.
7 is an exploded perspective view illustrating a liquid crystal display according to an embodiment.
FIG. 8 is a cross-sectional view taken along the line AA ′ of FIG. 7.
9 is a sectional view showing a light beam control member according to an experimental example.
10 and 11 are diagrams showing the luminance distribution in the experimental example and the comparative example.

In the description of the embodiments, each panel, sheet, member, guide or unit, etc. is described as being formed "on" or "under" of each panel, sheet, member, guide or unit, etc. In the case, “on” and “under” include both being formed “directly” or “indirectly” through other components. In addition, the upper or lower reference of each component is described with reference to the drawings. The size of each component in the drawings may be exaggerated for the sake of explanation and does not mean the size actually applied.

1 is an exploded perspective view illustrating a light beam control member, a light emitting diode, and a driving substrate according to an embodiment. 2 is a cross-sectional view showing a cross section of the luminous flux control member according to the embodiment. 3 is a view illustrating a luminous flux of light emitted through a luminous flux control member according to an exemplary embodiment. 4 to 6 are cross-sectional views illustrating modified examples of the light beam control member according to the embodiment.

1 to 6, a light source, for example, a light emitting diode 20 and a driving substrate 30, are coupled to the luminous flux control member 10 according to the embodiment, thereby forming a light emitting device.

The luminous flux control member 10 according to the embodiment is disposed on the driving substrate 30. The luminous flux control member 10 covers the light emitting diode 20. The luminous flux control member 10 may accommodate some or all of the light emitting diodes 20, and may be disposed above the light emitting diodes 20 without receiving the light emitting diodes 20.

Light emitted from the light emitting diodes 20 is incident on the light beam control member 10. The filling part 21 may be disposed between the luminous flux control member 10 and the light emitting diode 20. Light emitted from the light emitting diodes 20 may be incident on the luminous flux control member 10 through the filler 21.

The luminous flux control member 10 includes a depression 100 and a recess 200.

The depression 100 is formed on the light beam control member 10. The depression 100 corresponds to the light emitting diode 20. In addition, the depression 100 is recessed toward the light emitting diode 20. The depression 100 is recessed toward the recess 200. In more detail, the depression 100 is recessed toward the inner surface of the recess 200. The depression 100 is formed at the central portion of the luminous flux control member 10.

The center of the inner surface 110 of the recess 100 may be disposed on the optical axis OA of the light emitting diode 20. The optical axis OA of the light emitting diode 20 passes through the center of the inner surface 110 of the depression 100. In addition, the depression 100 may have a line-symmetric structure about the optical axis OA of the light emitting diode 20.

In addition, the center 201 of the inner surface of the concave portion 200 may be disposed on the optical axis OA of the light emitting diode 20. The optical axis OA of the light emitting diode 20 may pass through the center of the inner surface 110 of the recess 100 and the center 201 of the inner surface of the recess 200.

The inner surface 110 of the depression 100 may function as a reflective surface and a refractive surface.

The concave portion 200 corresponds to the light emitting diode 20. In addition, the recess 200 is opposite to the recess 100. The recess 200 is formed below the luminous flux control member 10. That is, the recess 200 is formed below the luminous flux control member 10.

The light emitting diodes 20 are disposed in the concave portion 200. In more detail, some or all of the light emitting diodes 20 are disposed in the recess 200. That is, some or all of the light emitting diodes 20 are disposed in the luminous flux control member 10.

In this case, the light emitted from the light emitting diode 20 may be incident through the inner surface of the recess 200. Accordingly, the inner surface of the concave portion 200 is an incident surface on which light is incident. That is, most of the light may be incident on the light beam control member 10 through the inner surface of the recess 200.

Unlike this, the concave portion 200 may not be formed in the luminous flux control member 10. In this case, the light emitting diodes 20 may be disposed on a flat rear surface of the luminous flux control member 10. In this case, the rear surface may be an entire incident surface.

In addition, the luminous flux control member 10 includes a first refractive surface 210, a second refractive surface 220, a scattering unit 230, and a rear surface 240.

The first refractive surface 210 extends from the outside of the depression 100. The first refractive surface 210 may extend laterally from the inner surface 110 of the depression 100. It may extend in a direction away from the optical axis OA of the light emitting diode 20 from the outside of the recess 100. As used herein, the term "optical axis" refers to a direction in which light travels in the center of a three-dimensional luminous flux from a point light source.

The first refracting surface 210 is a curved surface that is gently curved. The first refracting surface 210 may be spherical or aspheric. When the first refractive surface 210 is a spherical surface, it may have a radius of curvature of about 1.5 mm to about 2.5 mm. The first refractive surface 210 may refract the light emitted from the light emitting diodes 20. In more detail, the first refraction surface 210 may refract the light from the light emitting diodes 20 laterally or laterally.

 The first refractive surface 210 may surround the optical axis OA of the light emitting diode 20. In addition, the first refracting surface 210 may surround the recess.

The light refracted by the first refraction surface 210 may satisfy Equation 1 below.

Equation 1

θ2 / θ1> 1, and the θ2 / θ1 values become smaller as θ1 increases.

Here, θ1 is an angle between the light incident on the first refractive surface 210 and the optical axis OA of the light emitting diode 20, θ2 the light and the light emitting diode refracted by the first refractive surface 210. 20 is the angle between the optical axes OA.

The second refractive surface 220 is formed adjacent to the first refractive surface 210. The second refracting surface 220 extends from the first refracting surface 210 from the rear surface 240 of the luminous flux control member 10. The second refracting surface 220 extends laterally from the first scattering unit 230. In more detail, the second refractive surface 220 may extend from the first scattering portion 230 toward the driving substrate 30.

In addition, the second refractive surface 220 extends to the rear surface 240. That is, the second refractive surface 220 may meet the rear surface 240. That is, the second refractive surface 220 extends from the rear surface to the scattering unit 230. The rear surface 240 faces the driving substrate 30. In addition, the rear surface 240 extends from the inner surface of the recess 200.

The first refracting surface 210 is a curved surface that is gently curved. The second refractive surface 220 may be spherical or aspheric. When the second refractive surface 220 is a spherical surface, the radius of curvature of the second refractive surface 220 may be about 3.5 mm to about 7 mm. The second refractive surface 220 may emit light by refracting the light from the light emitting diodes 20.

The light refracted by the first refracting surface 210 may satisfy Equation 2 below.

Equation 2

θ4 / θ3> 1, and the θ4 / θ3 values become smaller as θ3 increases.

In this case, θ3 is an angle between the light incident on the second refractive surface 220 and the optical axis OA of the light emitting diode 20, θ4 the light refracted by the second refractive surface 220 and the light emitting diode ( 20 is the angle between the optical axes OA.

Here, the main function of the first refractive surface 210 and the second refractive surface 220 is a refractive function, but the first refractive surface 210 and the second refractive surface 220 may reflect some light. That is, the first refracting surface 210 and the second refracting surface 220 transmit and refract most of the light, but may reflect only a portion of the light.

The scattering unit 230 is formed between the first refractive surface 210 and the second refractive surface 220. The scattering unit 230 is bent or bent from the first refractive surface 210 to extend to the second refractive surface 220. In addition, the scattering unit 230 is bent or bent from the second refracting surface 220 to extend to the first refracting surface 210.

In addition, the scattering unit 230 surrounds the optical axis OA of the light emitting diode 20. In addition, the scattering unit 230 may surround the first refractive surface 210. The scattering unit 230 may have a ring shape when viewed from the top side.

As shown in FIG. 2 and FIG. 3, the scattering unit 230 may have a wrinkle structure. In this case, the wrinkles 231 of the scattering unit 230 may be formed to extend along the circumference of the first refractive surface 210. The scattering unit 230 may have a wrinkled structure once or twice. Accordingly, the scattering unit 230 may have a sin wave-shaped cross-sectional structure.

As shown in FIG. 4, the scattering unit 230 may have a bent structure. That is, the scattering unit 230 may have a mountain shape. Accordingly, according to the inclination of the inclined surface 232 of the scattering unit 230, the scattering unit 230 may change the path in various directions to emit light.

As shown in FIG. 5, the scattering unit 230 may include a scattering pattern 233. The scattering pattern 233 may be a fine uneven pattern. That is, the scattering pattern 233 may be a fine groove pattern or a protrusion pattern. The scattering pattern 233 may be formed by a process such as scratching.

In this case, the pitch of the scattering pattern 233 may be about several micrometers to about several tens of micrometers. The scattering pattern 234 may have a pitch of about 1 μm to about 100 μm. In addition, the width of the scattering pattern 233 may be about several micrometers to about several tens of micrometers. In addition, the height (or depth) of the scattering pattern 233 may be about 0.1㎛ to about 100㎛. The scattering pattern 233 may emit light from the light emitting diodes 20 in a random direction.

The scattering unit 230 may scatter incident light. That is, the scattering unit 230 may change the path of incident light in various directions. As shown in FIG. 3, light may be emitted from the scattering unit 230 in various directions. In this case, the light beam F3 of the light emitted from the scattering unit 230 may overlap the light beam F1 of the light emitted from the first refraction surface 210. In addition, the luminous flux F4 of the light emitted from the scattering unit 230 may overlap the luminous flux F2 of the light emitted from the second refracting surface 220. In this case, the light flux F1 of the light emitted from the first refractive surface 210 and the light flux F2 of the light emitted from the second refractive surface 220 do not overlap each other.

An angle between a straight line from the center 201 of the inner surface of the concave portion 200 to the scattering portion 230 and the optical axis OA of the light emitting diode 20 may be about 45 ° to about 55 °. . That is, the scattering unit 230 may be formed within an angle of about 45 ° to about 55 ° based on the optical axis OA of the light emitting diode 20.

In addition, a first straight line L1 may be defined from the center 201 of the inner surface of the concave portion 200 to a portion where the scattering portion 230 and the first refractive surface 210 meet. In this case, an angle θ6 between the first straight line L1 and the optical axis OA of the light emitting diode 20 may be about 45 ° to about 47 °.

In addition, a second straight line L2 may be defined from the center 201 of the inner surface of the concave portion 200 to the portion where the scattering portion 230 and the second refractive surface 220 meet. In this case, an angle θ5 between the second straight line L2 and the optical axis OA of the light emitting diode 20 may be about 53 ° to about 55 °.

As such, the scattering unit 230 may be formed in a region where luminance and / or color unevenness may occur, such as a mura and / or a yellow ring. In this case, since the scattering unit 230 scatters the emitted light, it is possible to easily eliminate such luminance and color uniformity.

Referring to FIG. 6, the scattering unit 230 may be formed entirely on the first and second refractive surfaces. That is, scattering patterns 234 may be formed on the first and second refractive surfaces.

That is, the second refracting surface and the first refracting surface are connected to each other without being bent or bent. Thus, the second refractive surface and the first refractive surface form one refractive surface 201.

In this case, the scattering pattern 234 is formed on the refractive surface 201 as a whole. In this case, a pitch of the scattering pattern 234 may be about several micrometers to about several tens of micrometers. The scattering pattern 234 may have a pitch of about 1 μm to about 100 μm. In addition, the scattering pattern 234 may have a width of about several μm to about several tens of μm. In addition, the height (or depth) of the scattering pattern 234 may be about 0.1㎛ to about 100㎛.

As such, since the scattering pattern 234 is directly formed on the refractive surface 201, the luminous flux control member 10 may improve luminance uniformity as a whole.

The first refracting surface 210, the second refracting surface 220, and the scattering unit 230 are formed on the side of the light beam control member 10.

The luminous flux control member 10 is transparent. The refractive index of the luminous flux control member 10 may be about 1.4 to about 1.5. The luminous flux control member 10 may be formed of plastic or glass. In addition, the ratio of the radius D and the thickness T of the luminous flux control member 10 may be about to about.

The luminous flux control member 10 may be attached to the driving substrate 30 by the adhesive part 300. In addition, the filling part 21 is filled in the recess 200. The filling part 21 may be in close contact with the inner surface of the concave part 200. In addition, the filling part 21 may be integrally formed with the adhesive part 300.

The light emitting diodes 20 generate light. The light emitting diode 20 may be a point light source. The light emitting diodes 20 are electrically connected to the driving substrate 30. The light emitting diode 20 may be mounted on the driving substrate 30. Accordingly, the light emitting diode 20 receives an electrical signal from the driving substrate 30. That is, the light emitting diodes 20 are driven by the driving substrate 30, thereby generating light.

The driving substrate 30 supports the light emitting diodes 20 and the luminous flux control member 10. In addition, the driving substrate 30 is electrically connected to the light emitting diodes 20. The driving substrate 30 may be a driving substrate 30. In addition, the driving substrate 30 may be rigid or flexible.

In the present exemplary embodiment, one light emitting diode 20 and one luminous flux control member 10 are disposed on one driving substrate 30, but embodiments are not limited thereto. For example, a plurality of light emitting diodes 20 may be disposed on one driving substrate 30. In addition, a plurality of luminous flux control members 10 may be disposed to correspond to each light emitting diode 20.

As described above, the light emitting device according to the embodiment includes the scattering unit 230. The scattering unit 230 scatters light from the light emitting diodes 20 between the first refractive surface 210 and the second refractive surface 220 and emits the light.

Accordingly, the light emitting device according to the embodiment can solve the luminance non-uniformity such as Mura caused by the concentration of light in a specific portion. Further, the light emitting device according to the embodiment can easily eliminate color unevenness such as a yellow ring generated by interference or the like.

Accordingly, the light beam control member 10 can efficiently diffuse the light emitted from the light emitting diodes 20.

Accordingly, the luminous flux control member 10 according to the embodiment may have improved luminance uniformity and color uniformity, and may be suitable for forming a surface light source.

7 is an exploded perspective view illustrating a liquid crystal display according to an embodiment. FIG. 8 is a cross-sectional view taken along the line A-A 'of FIG. 7. In this embodiment, the above-described light emitting device is referred to. That is, the description of the light emitting device of the foregoing embodiment can be essentially combined with the description of this embodiment.

7 and 8, the liquid crystal display according to the embodiment includes a liquid crystal display panel 50 and a backlight unit 40. The liquid crystal display panel 50 displays an image. Although not shown in detail, the liquid crystal display panel 50 is bonded to a thin film transistor (TFT) substrate and a color filter substrate to maintain a uniform cell gap facing each other, and a liquid crystal interposed between the two substrates. Layer. A plurality of gate lines are formed in the thin film transistor substrate, a plurality of data lines intersecting the plurality of gate lines are formed, and a thin film transistor TFT is formed at an intersection area of the gate line and the data line.

A gate driving printed circuit board 51 for supplying a scan signal to the gate line and an data driving PCB for supplying a data signal to the data line are provided at the edge of the liquid crystal display panel 50. circuit board 52 is provided.

The gate and data driving PCBs 51 and 52 are electrically connected to the liquid crystal display panel 50 by a chip on film (COF). Here, the COF may be changed to a TCP (Tape Carrier Package).

In addition, the liquid crystal display according to the embodiment surrounds the panel guide 54 supporting the liquid crystal display panel 50 and the edge of the liquid crystal display panel 50, and is coupled to the panel guide 54. 53).

The backlight unit 40 is configured in a direct manner provided in a large liquid crystal display device of 20 inches or more. The backlight unit 40 includes a bottom cover 41, a driving substrate 30, a plurality of light emitting diodes 20, a plurality of luminous flux control members 10, and optical sheets 42.

The bottom cover 41 has a box shape with an open upper surface, and accommodates the driving substrate 30. In addition, the bottom cover 41 supports the optical sheets 42 and the liquid crystal display panel 50.

The bottom cover 41 may be made of metal or the like. For example, the bottom cover 41 may be formed by bending or bending a metal plate. That is, the drive substrate 30 is accommodated in a space that is bent or curved.

The driving substrate 30 is disposed inside the bottom cover 41. The driving substrate 30 may be a driving substrate 30. The driving substrate 30 is electrically connected to the light emitting diodes 20. That is, the light emitting diodes 20 may be mounted on the driving substrate 30.

The driving substrate 30 has a plate shape. The driving substrate 30 is electrically connected to the light emitting diodes 20 and supplies a driving signal to the light emitting diodes 20.

A reflective layer may be coated on the upper surface of the driving substrate 30 to improve the performance of the backlight unit 40. That is, the reflective layer may reflect the light emitted from the light emitting diodes 20 upward.

The light emitting diodes 20 generate light by using an electrical signal applied through the driving substrate 30. That is, the light emitting diodes 20 are light sources for generating light. More specifically, each light emitting diode 20 is a point light source, and each of the light emitting diodes 20 is gathered to form a surface light source. Here, the light emitting diodes 20 are a light emitting diode package 20 including a light emitting diode chip 20.

The light emitting diodes 20 are mounted on the driving substrate 30. The light emitting diodes 20 may be disposed on the driving substrate 30 at regular intervals.

The light emitting diodes 20 emit white light. Alternatively, the light emitting diodes 20 may emit blue light, green light, and red light evenly.

The luminous flux control members 10 cover the light emitting diodes 20, respectively. Light from the light emitting diodes 20 is incident on the luminous flux control member 10, respectively. The incident light is emitted upward by the luminous flux control member 10 with improved luminance uniformity. The configuration and features of the luminous flux control members 10 may be substantially the same as the luminous flux control member 10 of the previous embodiment.

The optical sheets 42 improve the characteristics of the light passing through. The optical sheets 42 may be, for example, a polarizing sheet, a prism sheet, or a diffusion sheet.

As described in the above embodiment, the luminous flux control member 10 can effectively assure the light emitted from the light emitting diodes 20. Accordingly, the backlight unit 40 according to the embodiment emits light having improved luminance uniformity to the liquid crystal panel.

Therefore, the liquid crystal display device according to the embodiment has improved luminance uniformity and can realize an improved image quality.

In addition, 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 may be combined or modified with respect to other embodiments by those 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 to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood 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.

Experimental Example

As shown in Fig. 9, a light flux control member 10 is provided. In this case, the radius D of the luminous flux control member 10 is about 14 mm, the thickness T is about 4.7 mm, the radius of curvature of the first refractive surface is about 2.5 mm, and the radius of curvature of the second refractive surface is About 7 mm. In addition, the scattering unit was formed from about 62 ° to about 64 ° based on the optical axis of the light emitting diode. The scattering portion was composed of wrinkles having an amplitude of about 50 μm.

Comparative example

Except for the scattering portion, it was configured similarly to the experimental example. The first refracting surface and the second refracting surface were gently connected, and no scattering portion was formed separately.

result

The light emitting diodes 20 were arranged in the luminous flux control members of the experimental example and the comparative example, and the directivity angle luminance distribution of the light emitted from the luminous flux control member 10 was measured as shown in FIGS. 10 and 11.

In addition, yellow rings were observed in the comparative examples, whereas yellow rings were hardly observed in the experimental examples. In addition, the mura in the experimental example was observed more blurring than the mura in the comparative example.

Claims (20)

An incident surface on which light is incident;
A first refractive surface on which light incident through the incident surface is emitted;
A second refracting surface formed next to the first refracting surface; And
And a scattering portion between the first refracting surface and the second refracting surface. The method of claim 1, further comprising a depression recessed toward the incident surface,
The first refracting surface surrounds the periphery of the depression,
And the second refracting surface surrounds the periphery of the first refracting surface. The light beam control member of claim 1, wherein the scattering portion is bent or bent from the first refractive surface to extend to the second refractive surface. The method of claim 2, further comprising a recess corresponding to the depression,
And the incident surface is an inner surface of the concave portion. The luminous flux control member according to claim 1, wherein the luminous flux of light emitted from the scattering portion overlaps the luminous flux of light emitted from the first refracting surface. The luminous flux control member according to claim 5, wherein the luminous flux of light emitted from the scattering portion overlaps the luminous flux of light emitted from the second refracting surface. The light beam control member of claim 1, wherein an angle between a straight line from the light emitting diode to the scattering portion and the optical axis of the light source is 45 ° to 55 °. The optical axis of claim 2, wherein an optical axis through which a center of the incidence surface and an inner surface of the depression pass simultaneously through a center is defined.
A straight line extending from the center of the incident surface to a portion where the scattering portion and the first refracting surface meet and an angle between 45 ° and 47 °,
And a straight line extending from the center of the incident surface to a portion where the scattering portion and the second refractive surface meet each other, and the angle between the optical axis and the light axis is 53 ° to 55 °. The light beam control member according to claim 1, wherein the scattering portion includes wrinkles extending along the circumference of the first refractive surface. The light beam control member of claim 1, wherein the scattering unit comprises a scattering pattern. The light flux control member of claim 10, wherein the scattering pattern has a pitch of 1 μm to 100 μm. According to claim 1, further comprising a back surface extending from the incident surface,
And the second refracting surface extends to the rear surface. An incident surface on which light is incident;
A depression recessed toward the incident surface;
A rear surface extending from the incident surface; And
A refractive surface extending from the outer edge of the depression to the rear surface;
And a scattering pattern formed on the refractive surface. The method of claim 13, wherein the scattering pattern has a height of 0.1 ㎛ to 100 ㎛,
The pitch of the scattering pattern is luminous flux control member 1㎛ to 100㎛. The light beam control member of claim 13, wherein an area in which the scattering pattern is formed extends along a circumference of the depression. The light beam control member according to claim 13, wherein the refractive surface has a convex shape. Light source;
A luminous flux control member through which light from the light source is incident; And
A display panel to which light from the light beam control member is incident;
The light flux control member
A first refractive surface on which light from the light source is emitted;
A second refracting surface formed next to the first refracting surface; And
And a scattering unit between the first refractive surface and the second refractive surface. The display device of claim 17, wherein an angle between a straight line extending from the light source to the scattering part and an optical axis of the light source is 45 ° to 55 °. The method of claim 17, wherein the scattering portion is bent or bent from the first refracting surface,
The scattering portion is bent or bent from the second refractive surface. The display device of claim 17, wherein the luminous flux of the light emitted through the scattering portion overlaps with the luminous flux of the light emitted from the first and second refractive surfaces.

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