KR20210023151A - Light route control member and display device - Google Patents

Abstract

According to an embodiment, provided is a light path control member having improved frontal luminance and reducing the moire effect, which includes a base substrate, a resin layer disposed on the base substrate, and a plurality of pattern units disposed on the base substrate. The resin layer may include a first resin layer disposed on the base substrate, a second resin layer disposed on the base substrate and alternately disposed with the first resin layer, and a third resin layer disposed on the first resin layer and the second resin layer. The pattern unit is disposed between the first resin layer and the second resin layer, and the width of the pattern portion is 100 nm to 1000 nm.

Description

TECHNICAL FIELD [0002] A light path control member and a display device including the same

The embodiment relates to a light path control member and a display device including the same.

The shading film blocks the transmission of light from the light source, and is attached to the front of the display panel, which is a display device used for mobile phones, notebook computers, tablet PCs, vehicle navigation, and vehicle touch, and the incident angle of light when the display transmits the screen. It is used for the purpose of expressing clear image quality at the viewing angle required by the user by adjusting the viewing angle of light according to the method.

In addition, it can be used for windows of vehicles or buildings to partially shield external light to prevent glare or to prevent the inside from being seen from the outside.

That is, the light-shielding film controls the path of light, blocks light in a specific direction and transmits light in a specific direction, so that the user can visually recognize only light of a viewing angle in a specific angular range.

Meanwhile, such a light blocking film may be applied to a display device such as a navigation device or an instrument panel for a vehicle in a moving means such as a vehicle, and may be applied to various fields according to various purposes.

In the light shielding film, a plurality of patterns for converting the path of light may be formed on a transparent substrate in order to control the path of light.

Since these patterns serve to block light, there is a problem in that the transmittance of light decreases as the area of the patterns increases.

In addition, when a light shielding film including such patterns is combined with a display panel, the pattern of the light shielding film and the patterns of the display panel may be disposed to overlap each other, and a moire phenomenon may occur due to the overlapping phenomenon.

This moire phenomenon is recognized by external users, and may cause a decrease in visibility to the user.

Accordingly, there is a need for a light path control member having a new structure capable of increasing light transmittance to improve front luminance and preventing moire phenomenon according to a pattern.

An embodiment is to provide a light path control member that has improved front luminance and can reduce moire phenomenon and the like.

The optical path control member according to the embodiment includes: a base substrate; A resin layer disposed on the base substrate; And a plurality of pattern portions disposed on the base substrate, wherein the resin layer comprises: a first resin layer disposed on the base substrate; A second resin layer disposed on the base substrate and alternately disposed with the first resin layer; And a third resin layer disposed on the first resin layer and the second resin layer, wherein the pattern portion is disposed between the first resin layer and the second resin layer, and the width of the pattern portion is 100 nm To 1000 nm.

The optical path control member according to the embodiment includes: a base substrate; A resin layer disposed on the base substrate; And a plurality of pattern portions disposed on the base substrate, wherein the resin layer comprises: a first resin layer disposed on the base substrate; And a second resin layer disposed on the base substrate and alternately disposed with the first resin layer, wherein the pattern portion is disposed between the first resin layer and the second resin layer, and the width of the pattern portion Is from 100 nm to 1000 nm.

The optical path control member according to the embodiment may reduce the width of the pattern portion. Accordingly, since the aspect ratio can be increased by increasing the thickness while reducing the width of the pattern portion, it is possible to increase the light transmittance while easily controlling the viewing angle of the user.

In addition, the light path control member according to the embodiment may bury the pattern portion in the resin layer. Accordingly, it is possible to stably fix the pattern portion and prevent distortion of the pattern portion. In addition, by preventing the pattern portion from being exposed to the outside, it is possible to prevent characteristic change and characteristic deterioration due to oxidation of the pattern portion.

In addition, the optical path control member according to the embodiment may control the pitch of the pattern portion. Accordingly, a moire phenomenon caused by overlapping of the pattern portion of the light path control member and the pattern portion of the panel coupled to the light path control member may be alleviated, thereby improving user visibility.

In addition, the light path control member according to the embodiment may have a pattern portion inclined at a certain angle, so that the viewing angle of a user to be implemented may be easily controlled.

In conclusion, the light path control member according to the embodiment may improve the front luminance by increasing the light transmittance, thereby improving the user's visibility and improving the reliability of the light path control member.

1 is a view showing a perspective view of an optical path control member according to a first embodiment.
2 is a diagram illustrating a top view of an optical path control member according to an embodiment.
3 and 4 are diagrams illustrating cross-sectional views of the optical path control member according to the first embodiment taken along the area AA′ of FIG.
5 to 9 are views for explaining a method of manufacturing the optical path control member according to the first embodiment.
10 is a view showing a perspective view of an optical path control member according to a second embodiment.
11 is a diagram illustrating a top view of an optical path control member according to an embodiment.
12 and 13 are diagrams illustrating a cross-sectional view of an optical path control member according to a second embodiment of the present invention by cutting the area BB′ of FIG. 11.
14 to 18 are views for explaining a method of manufacturing an optical path control member according to the second embodiment.
19 to 22 are views showing cross-sectional views of an optical path control member according to a third embodiment.
23 is a graph for explaining a moire phenomenon of an optical path control member according to an embodiment and a comparative example.
24 is a diagram illustrating a cross-sectional view of a display device to which an optical path control member according to example embodiments is applied.
25 is a diagram for describing an embodiment of a display device to which an optical path control member according to the embodiment is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical idea of the present invention is not limited to some of the embodiments to be described, but may be implemented in a variety of different forms, and within the scope of the technical idea of the present invention, one or more of the constituent elements may be selectively selected between the embodiments. It can be combined with and substituted for use.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention are generally understood by those of ordinary skill in the art, unless explicitly defined and described. It can be interpreted as a meaning, and terms generally used, such as terms defined in a dictionary, may be interpreted in consideration of the meaning in the context of the related technology.

In addition, terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular form may also include the plural form unless specifically stated in the phrase, and when described as “at least one (or more than one) of A and (and) B and C”, it may be combined with A, B, and C. It may contain one or more of all possible combinations.

In addition, terms such as first, second, A, B, (a), and (b) may be used in describing the constituent elements of the embodiment of the present invention. These terms are only for distinguishing the constituent element from other constituent elements, and are not limited to the nature, order, or order of the constituent element by the term.

And, when a component is described as being'connected','coupled' or'connected' to another component, the component is not only directly connected, coupled, or connected to the other component, but also the component and The case of being'connected','coupled', or'connected' due to another component between the other components may also be included.

In addition, when it is described as being formed or disposed on the “top (top) or bottom (bottom)” of each component, the top (top) or bottom (bottom) is one as well as when the two components are in direct contact with each other. It also includes the case where the above other component is formed or disposed between the two components.

In addition, when expressed as “up (up) or down (down)”, the meaning of not only an upward direction but also a downward direction based on one component may be included.

Hereinafter, a light path control member according to embodiments will be described with reference to the drawings.

First, an optical path control member according to a first embodiment will be described with reference to FIGS. 1 to 9.

1 to 4, the light path control member according to the first embodiment may include a base substrate 100, a resin layer 150, and a pattern part 200.

The base substrate 100 may include a transparent material. The base substrate 100 may include a flexible material. The base substrate 100 may include plastic.

For example, the base substrate 100 may include a plastic material such as PET (Poly-ester), PMMA (Poly Methyl Meta acryl), PA (Poly Carbonate), or PC (Polycarbonate).

One of the horizontal and vertical directions of the base substrate 100 may be a long side, and the other may be a short side, and the base substrate 100 may have a rectangular parallelepiped shape. Alternatively, the sizes of sides of the base substrate 100 in the horizontal direction and the vertical direction are the same, and the base substrate may have a cube shape. The base substrate may be variously changed according to the shape of other members constituting a display or the like.

The base substrate 100 may include one side and the other side. For example, the base substrate 100 may include one surface and the other surface opposite to the one surface based on the thickness direction of the base substrate 100. That is, the base substrate 100 may include two surfaces opposite to each other, that is, facing each other.

Any one surface of the base substrate may be defined as a direction viewed by the user. In addition, the other side of the base substrate may be defined as a direction in which a light source such as a display panel that emits light is disposed in the direction of the base substrate.

That is, light is emitted in the direction of the base substrate by a light source such as a display panel disposed on the other surface of the base substrate, and exit light is incident on any one surface of the base substrate and a display is displayed, The user can visually recognize the display on any one surface of the base substrate.

The resin layer 150 may be disposed on the base substrate 100. The resin layer 150 may be disposed in direct contact with the base substrate 150. The resin layer 150 may include a photocurable resin such as a UV resin or a thermosetting resin.

Alternatively, the resin layer 150 may include the same material as the base substrate 100. For example, the resin layer 150 may be integrally formed with the base substrate 100.

The resin layer 150 may be disposed on at least one of one surface and the other surface of the base substrate 100. That is, the resin layer may be disposed on one surface of the base substrate 100 in the user direction or the other surface of the base substrate 100 in the display panel direction.

3 and 4, the resin layer 150 may include a first resin layer 151, a second resin layer 152 and a third resin layer 153.

In detail, the first resin layer 151 and the second resin layer 152 may be disposed on the base substrate 100. In detail, the first resin layer 151 and the second resin layer 152 may be alternately disposed on the base substrate 100. That is, any one first resin layer 151 is disposed between two second resin layers 152, and any one second resin layer 152 is between two first resin layers 151 Can be placed on

The first resin layer 151 and the second resin layer 152 may be disposed on the base substrate 100 to have different widths. In detail, the width of the first resin layer 151 may be greater than the width of the second resin layer 152.

In addition, the first resin layer 151 and the second resin layer 152 may be disposed on the base substrate 100 to have the same thickness.

That is, the first resin layer 151 and the second resin layer 152 may be disposed on the base substrate 100 in different areas. That is, the area of the first resin layer 151 may be larger than the area of the second resin layer.

The third resin layer 153 may be disposed on the first resin layer 151 and the second resin layer 152.

The thickness of the third resin layer 153 may be smaller than the thickness of the first resin layer 151 and the thickness of the second resin layer 152.

The first resin layer 151, the second resin layer 152, and the third resin layer 153 may include materials that are the same as or different from each other.

For example, the second resin layer 152 and the third resin layer 153 include the same material, and the first resin layer 151 is the second resin layer 152 and the third resin layer 153. It may include a material different from that of the resin layer 153. In this case, a difference in refractive index between the first resin layer 151, the second resin layer 152, and the third resin layer 153 may be 0.005 or less.

When the difference in refractive index between the first resin layer 151 and the second resin layer 152 and the third resin layer 153 exceeds 0.005, the first resin layer 151 and the second resin layer Due to the difference in refractive index between the 152 and the third resin layer 153, light scattering occurs through the optical path control member, and a plurality of double images, that is, virtual images, may be generated to the user, thereby reducing visibility. .

Alternatively, the first resin layer 151, the second resin layer 152, and the third resin layer 153 may include different materials. That is, the first resin layer 151, the second resin layer 152, and the third resin layer 153 may all include materials having different refractive indices.

At this time, the difference in refractive index between the first resin layer 151 and the second resin layer 152, the difference in refractive index between the first resin layer 151 and the third resin layer 153, and the second resin layer ( The difference in refractive index between 152 and the third resin layer 153 may be 0.005 or less.

When the difference in refractive index between the first resin layer 151, the second resin layer 152, and the third resin layer 153 exceeds 0.005, the first resin layer 151 and the second resin layer Due to the difference in refractive index between the 152 and the third resin layer 153, light scattering occurs through the optical path control member, and a plurality of double images, that is, virtual images, may be generated to the user, thereby reducing visibility. .

Alternatively, the first resin layer 151, the second resin layer 152, and the third resin layer 153 may include the same material. That is, the first resin layer 151, the second resin layer 152, and the third resin layer 153 may all include materials having the same or similar refractive index.

The pattern part 200 may be disposed between the resin layers. In detail, the pattern part 200 may be disposed between the first resin layer 151 and the second resin layer 152. In addition, the pattern part 200 may be disposed between the base substrate 100 and the third resin layer 153.

That is, the first resin layer 151 and the second resin layer 152 are disposed to be spaced apart from each other, and the pattern part 200 includes the first resin layer 151 and the second resin layer 152 Can be placed in between.

That is, as shown in FIG. 3, the pattern part 200 may be disposed surrounded by the first resin layer 151, the second resin layer 152, and the third resin layer 153. Alternatively, as shown in FIG. 4, the pattern part 200 is arranged surrounded by the base substrate 100, the first resin layer 151, the second resin layer 152, and the third resin layer 153. Can be.

Accordingly, since the pattern part 200 is not exposed to the outside, the reliability of the pattern part 200 may be improved by preventing oxidation of the pattern part 200.

The pattern part 200 may be disposed while having a certain inclination angle with respect to one surface of the base substrate 100. In detail, the pattern part 200 may be disposed with an inclination angle of about 1° to 89° with respect to the top or bottom surface of the base substrate 100.

The inclination angle of the pattern part 200 may be related to a viewing angle of a user who visually recognizes a display or the like through the light path member. That is, the inclination angle of the pattern unit 200 may be changed according to the size of the viewing angle of the user to be implemented.

The pattern part 200 may have light transmittances different from those of the first resin layer 151, the second resin layer 152, and the third resin layer 153.

In detail, the light transmittance of the pattern part 200 may be lower than the light transmittance of the first resin layer 151, the second resin layer 152, and the third resin layer 153.

That is, the pattern part 200 may include a material having a low light transmittance. The pattern part 200 may include an opaque material. The pattern part 200 may include a colored material.

For example, the pattern part 200 may include a metallic material. For example, the pattern part 200 may include a metallic material such as chromium (Cr), titanium carbide (TiC), or diamond-like carbon (DLC). Alternatively, the pattern portion may include graphite.

That is, the pattern part 200 may serve as a light shielding function. That is, the pattern part 200 may be a light blocking pattern part.

That is, the light incident on the light path control member is transmitted through the first resin layer 151, the second resin layer 152, and the third resin layer 153, and is blocked by the pattern part 200. Can be.

In detail, the movement path of the incident light incident on the light path control member by the pattern unit 200 may be changed. That is, the light path control member according to the embodiment may partially block incident light and partially transmit it, so that the light is transmitted only at a desired angle and at a desired position. Accordingly, the viewing angle of the user may be controlled by the light that passes through the light path member and is emitted toward the user.

The pattern part 200 may have a certain width w. In detail, the pattern part 200 may have a fine line width. In the following description, the width w of the pattern part 200 may be defined as the maximum width of the pattern part 200.

The width w of the pattern part 200 may have a size in a nanometer unit. In detail, the width w of the pattern part 200 may be 1000 nm or less. In more detail, the width w of the pattern portion may be 100 nm to 1000 nm.

It may be difficult to implement the width w of the pattern part 200 to be 100 nm or less in the process, and the width of the pattern part 200 may be too small to reduce the light blocking effect. In addition, when the width w of the pattern portion 200 exceeds 1000 nm, the overall transmittance of the light path control member is lowered by the pattern portion serving as a light shielding portion, thereby deteriorating user visibility.

Meanwhile, the pattern part 200 may have different widths according to positions. For example, the pattern part 200 may have an upper width w1 of the pattern part 200 and a lower width w2 of the pattern part having different sizes.

In detail, the upper width w1 of the pattern part 200 may be larger than the lower width w2 of the pattern part. For example, the pattern part 200 may be formed to gradually decrease in width while extending from the top to the bottom.

The pattern part 200 may have a certain thickness t. In detail, the thickness of the pattern part 200 may have a size in micrometer units. In detail, the thickness t of the pattern part 200 may be 100 μm or less. In more detail, the thickness t of the pattern portion 200 may be 20 μm to 80 μm. In more detail, the thickness t of the pattern portion 200 may be 30 μm to 50 μm.

It may be difficult to implement the thickness t of the pattern portion 200 exceeding about 100 μm in the process. In addition, when the thickness t of the pattern portion is less than about 20 μm, the light shielding effect by the pattern portions May deteriorate. In addition, since the height of the pattern portion is too low to be visible to other users outside the required viewing angle range, a privacy problem may occur. In addition, a virtual image may be displayed on the windshield or window of the vehicle to obstruct the user's view. The luminance of light may decrease at the viewing angle viewed by the user due to the dispersion of light.

In addition, the aspect ratio (t/w) of the pattern part 200 may be 1000 or less. In detail, the length ratio of the pattern part 200 may be 200 to 500. That is, the pattern portion 200 is implemented with a fine line width, so that the aspect ratio of the pattern portion may be increased. Therefore, it is possible to easily control the viewing angle of the user to be implemented. That is, even if the thickness of the pattern portion is increased, the width of the pattern portion is maintained at a fine width, so that the viewing angle of the user can be easily controlled while maintaining the light transmittance.

In addition, the pitch (p) of the pattern portion 200 may be about 10 μm or less. In detail, the pitch p of the pattern part 200 may be about 1 μm to 10 μm.

The range of the pitch p of the pattern part 200 is a range for minimizing moire due to an overlapping phenomenon between patterns when the optical path control member according to the embodiment is combined with another member.

In the case of the pattern part 200, when the light path control member including the pattern part is combined with a display panel and the like to form a display device, the pattern and the light path of the display panel have a directionality extending in one direction or in a plurality of directions. Moire may occur due to an overlapping phenomenon between patterns of the control member.

Due to the moire phenomenon, a user who looks at the display device from the outside may visually recognize the pattern generated by the moire phenomenon from the outside, and accordingly, the user's visibility may be deteriorated.

When the pitch (p) of the pattern portion exceeds about 10 μm, the pattern due to the moire phenomenon due to the overlapping of the pattern portion of the optical path control member and the pattern portion of another member is recognized from the outside, thereby reducing the visibility of the user. I can.

In this case, the moire reduction effect according to the range of the pitch p of the pattern portion may have an optimum effect when the pitch of the pattern of the other member coupled to the optical path control member exceeds about 100 μm.

In detail, the moire reduction effect according to the range of the pitch p of the pattern portion may have an optimum effect when the pitch of the pattern of another member coupled to the optical path control member is 100 μm to 150 μm.

In more detail, the moire reduction effect according to the range of the pitch p of the pattern portion may have an optimum effect when the pitch of the pattern of another member coupled to the optical path control member is 120 μm to 145 μm.

Hereinafter, a method of manufacturing the optical path control member according to the first embodiment will be described with reference to FIGS. 5 to 9.

Referring to FIG. 5, first, a base substrate 100 may be prepared, and a first resin material M1 may be disposed on the base substrate 100.

Subsequently, referring to FIGS. 6 and 7, a plurality of concave portions E may be formed on the first resin material M1. In detail, a plurality of concave portions E formed from one surface to the other surface may be formed on one surface of the first resin material M1.

The intaglio portions E may be formed such that inner surfaces of the intaglio portions have a constant inclination with respect to one surface of the base substrate 100.

The concave portions E may be formed by an imprinting process by disposing an embossed mold on one surface of the first resin material M1.

Accordingly, as shown in FIG. 6, the concave portions E penetrate one surface of the first resin material M1 and are etched to a predetermined depth to form an opening. Accordingly, one end of the first resin material M1 is opened. And, a plurality of concave portions having a groove shape in which the other end is closed may be formed.

Alternatively, as shown in FIG. 7, the concave portions E may be formed to penetrate both one surface and the other surface of the first resin material M1. Accordingly, in the first resin material M1, a plurality of concave portions having a hole shape formed by opening both one end and the other end may be formed.

Subsequently, referring to FIG. 8, a pattern part 200 may be formed in the intaglio part E. The pattern part 200 may be formed by a sputtering process. That is, the pattern part 200 may be deposited on one inner surface of the intaglio part E using a metal material capable of a sputtering process.

Accordingly, the pattern portion 200 may be partially disposed in the space of the intaglio portion E. That is, the pattern portion 200 may be formed to have a width smaller than the width of the intaglio portion E.

In detail, since the pattern portion 200 is formed by a sputtering process, the pattern portion 200 may be implemented in a nanometer unit, that is, a fine line width having a width of 100 nm to 1000 nm.

In this case, the pattern portion 200 formed in the intaglio portion E may have a width of an upper region larger than that of a lower region. For example, the pattern part 200 may extend from an upper region to a lower region and may be formed to have a smaller width.

Next, referring to FIG. 9, a second resin material M2 may be disposed on the first resin material M1. The second resin material M2 may be disposed while filling the inside of the intaglio portion, that is, the inside of the intaglio portion where the pattern portion is not formed.

That is, the second resin material M2 may be disposed on the first resin material M1 while filling the intaglio portion of the first resin material M1.

Accordingly, the pattern portion may be disposed surrounded by the resin material. That is, the pattern part 200 may be embedded and disposed in a resin material. Accordingly, since the pattern portion can be stably fixed to prevent distortion of the pattern portion, a change in the viewing angle due to the distortion of the pattern portion can be prevented.

In addition, since the pattern portion may be prevented from being exposed to the outside, oxidation of the pattern portion including a metal material may be prevented.

The optical path control member according to the first embodiment may reduce the width of the pattern portion. Accordingly, since the aspect ratio can be increased by increasing the thickness while reducing the width of the pattern portion, it is possible to increase the light transmittance while easily controlling the viewing angle of the user.

In addition, the light path control member according to the first embodiment may bury the pattern portion in the resin layer. Accordingly, it is possible to stably fix the pattern portion and prevent distortion of the pattern portion. In addition, by preventing the pattern portion from being exposed to the outside, it is possible to prevent characteristic change and characteristic deterioration due to oxidation of the pattern portion.

In addition, the optical path control member according to the first embodiment may control the pitch of the pattern portion. Accordingly, a moire phenomenon caused by overlapping of the pattern portion of the light path control member and the pattern portion of the panel coupled to the light path control member may be alleviated, thereby improving user visibility.

In addition, the optical path control member according to the first exemplary embodiment forms the pattern portion to have an inclination at a predetermined angle, so that the viewing angle of a user to be implemented can be easily controlled.

In conclusion, the light path control member according to the first embodiment may improve the front luminance by increasing the light transmittance, thereby improving the user's visibility and improving the reliability of the light path control member.

Hereinafter, an optical path control member according to a second embodiment will be described with reference to FIGS. 10 to 18. In the description of the optical path control member according to the second embodiment, descriptions similar to those of the optical path control member according to the first embodiment described above will be omitted. In addition, the same reference numerals are assigned to the same configuration as the optical path control member according to the first embodiment.

10 to 13, the optical path control member according to the second embodiment may include a base substrate 100, a resin layer 150, and a pattern portion 200.

The base substrate 100 and the pattern portion 200 of the optical path control member according to the second embodiment are the same as the base substrate 100 and the pattern portion 200 of the optical path control member according to the first embodiment described above. The following description is omitted.

The optical path control member according to the second embodiment may have different configurations of the light path control member according to the first embodiment and the resin layer 150.

In detail, the optical path control member according to the second embodiment may include a first resin layer 151 and a second resin layer 152.

In detail, the first resin layer 151 and the second resin layer 152 may be disposed on the base substrate 100. In detail, the first resin layer 151 and the second resin layer 152 may be alternately disposed on the base substrate 100. That is, any one first resin layer 151 is disposed between two second resin layers 152, and any one second resin layer 152 is between two first resin layers 151 Can be placed on

The first resin layer 151 and the second resin layer 152 may be disposed on the base substrate 100 to have different widths. In detail, the width of the first resin layer 151 may be greater than the width of the second resin layer 152.

In addition, the first resin layer 151 and the second resin layer 152 may be disposed on the base substrate 100 to have the same thickness.

That is, the first resin layer 151 and the second resin layer 152 may be disposed on the base substrate 100 in different areas. That is, the area of the first resin layer 151 may be larger than the area of the second resin layer.

In the optical path control member according to the second embodiment, a separate additional resin layer is not disposed on the first resin layer 151 and the second resin layer 152, and the upper surface of the pattern part 200 It can be exposed and placed.

Therefore, since no additional resin layer is further disposed, the process time can be shortened, and the thickness of the optical path control member can be reduced. In addition, it is possible to prevent scattering due to a difference in refractive index of the resin layer, thereby preventing a virtual image, and increasing the transmittance of light passing through the light path control member by reducing the thickness of the resin layer.

Hereinafter, a method of manufacturing an optical path control member according to a second embodiment will be described with reference to FIGS. 14 to 18.

Referring to FIG. 14, first, a base substrate 100 may be prepared, and a first resin material M1 may be disposed on the base substrate 100.

Subsequently, referring to FIGS. 15 and 16, a plurality of concave portions E may be formed on the first resin material M1. In detail, a plurality of concave portions E formed from one surface to the other surface may be formed on one surface of the first resin material M1.

The intaglio portions E may be formed such that inner surfaces of the intaglio portions have a constant inclination with respect to one surface of the base substrate 100.

The concave portions E may be formed by an imprinting process by disposing an embossed mold on one surface of the first resin material M1. Accordingly, as shown in FIG. 15, the concave portions E are formed by penetrating one surface of the first resin material M1 and being etched to a predetermined depth. Accordingly, one end of the first resin material M1 is opened. And, a plurality of concave portions having a groove shape in which the other end is closed may be formed.

Alternatively, as shown in FIG. 16, the concave portions E may be formed to penetrate both one surface and the other surface of the first resin material M1. Accordingly, in the first resin material M1, a plurality of concave portions having a hole shape formed by opening both one end and the other end may be formed.

Subsequently, referring to FIG. 17, a pattern portion 200 may be formed in the intaglio portion E. The pattern part 200 may be formed by a sputtering process. That is, the pattern part 200 may be deposited on one inner surface of the intaglio part E using a metal material capable of a sputtering process.

Accordingly, the pattern portion 200 may be partially disposed in the space of the intaglio portion E. That is, the pattern portion 200 may be formed to have a width smaller than the width of the intaglio portion E.

In detail, since the pattern portion 200 is formed by a sputtering process, the pattern portion 200 may be implemented in a nanometer unit, that is, a fine line width having a width of 100 nm to 1000 nm.

In this case, the pattern portion 200 formed in the intaglio portion E may have a width of an upper region larger than that of a lower region. For example, the pattern part 200 may extend from an upper region to a lower region and may be formed to have a smaller width.

Subsequently, referring to FIG. 18, a second resin material M2 may be disposed on the first resin material M1. The second resin material M2 may be disposed while filling the inside of the intaglio portion, that is, the inside of the intaglio portion where the pattern portion is not formed. In detail, the second resin material M2 may be disposed only inside the concave portion where the pattern portion is not formed.

That is, the second resin material M2 may be disposed such that the top surface of the second resin material M2 is positioned on the same plane as the top surface of the first resin material M1.

Hereinafter, a light path control member according to a third embodiment will be described with reference to FIGS. 19 to 22. In the description of the optical path control member according to the third embodiment, descriptions similar to those of the optical path control members according to the first and second embodiments described above will be omitted. In addition, the same reference numerals are assigned to the same configurations as those of the optical path control member according to the first and second embodiments.

19 to 22, the light path control member according to the third embodiment may include a base substrate 100, a resin layer 150, and a pattern portion 200.

The base substrate 100 and the resin layer 150 of the optical path control member according to the third embodiment are the base substrate 100 and the resin layer 150 of the optical path control member according to the first and second embodiments described above. Since the same, the following description will be omitted.

The optical path control member according to the third exemplary embodiment may have different configurations of the pattern layer 200 from the optical path control member according to the first and second exemplary embodiments.

In detail, in the light path control member according to the third embodiment, the pattern portion 200 may be disposed in a direction perpendicular to one surface of the base substrate 100. That is, the pattern part 200 does not have an inclination, and may be disposed to extend in a vertical direction with respect to one surface of the base substrate 100.

Accordingly, the optical path control member according to the third exemplary embodiment may uniformly arrange the pattern portions 200. That is, the pattern portion 200 does not have an inclination and is uniformly disposed in a direction perpendicular to one surface of the base substrate 100, so that the inclination angle of the pattern portion may be prevented from becoming uneven for each area due to an error during the process. have.

Accordingly, the light path control member may prevent the light transmittance and the light blocking rate from being different for each area of the light path member, and may have a uniform light transmittance and light blocking rate for each area.

Hereinafter, the present invention will be described in more detail through the Moire measurement of the optical path control member according to Examples and Comparative Examples. These examples are merely presented as examples to describe the present invention in more detail. Therefore, the present invention is not limited to these examples.

Example

After arranging the UV resin on the polyethylene terephthalate substrate, a plurality of groove-shaped concave portions were formed on the UV resin by an imprinting process.

Subsequently, a pattern portion was formed on the inner surfaces of the plurality of metal intaglios through a sputtering process.

At this time, the pattern part included any one of chromium (Cr), titanium carbide (TiC), diamond like carbon (DLC), and graphite/

Subsequently, an additional resin was applied on the UV resin to form a resin layer on the inside of the concave portion in which the pattern portion was not formed and on the UV resin to prepare a final light path control member.

Subsequently, after the light path control member was disposed on the display panel, the light path control member and the display panel were bonded to each other by an adhesive layer.

Subsequently, a moire phenomenon of light emitted from the display panel, incident from the upper surface of the UV resin, and emitted in the direction of the polyethylene terephthalate substrate was observed.

At this time, the pitch of the pattern portion was observed in the range of 10 μm or less (Examples 1 to 16), respectively, the Moire phenomenon.

At this time, the presence or absence of the moire was measured by measuring the bonding wavelength (λ, µm) by the following equation, and when the bonding wavelength (λ) was 2500 or more, moire was generated, and when it was less than 2500, moire was not generated.

In detail, the coupling wavelength λ may be defined by the following equation using the pitch and number of the pattern portions of the optical path control member and the pitch and number of the pixel patterns of the display panel.

[Equation]

(P1 is the pitch of the pattern portion of the light path control member, P2 is the pitch of the pixel pattern of the display panel, k is the number of pattern portions of the light path control member, and m is the number of pixel patterns of the display panel.)

At this time, the pitch of the pixel pattern of the display panel was selected in the range of 123 μm to 141 μm,

In addition, as shown in Table 1 below, the moire phenomenon was observed in the ranges (series 1 to 16) of the number of patterns (k) of the optical path control member and the number of pixel patterns (m) of the display panel, respectively.

Number of pattern copies of the optical path control member (k) Number of pixel patterns on the display panel (m) Series 1 One 4 Series 2 One 3 Series 3 One 3 Series 4 One 3 Series 5 One 4 Series 6 One 4 Series 7 3 4 Series 8 One 3 Series 9 2 4 Series 10 One 4 Series 11 2 3 Series 12 2 4 Series 13 3 4 Series 14 2 3 Series 15 One 3 Series 16 2 4

Referring to FIG. 23, it can be seen that a moire phenomenon does not occur in the optical path control member according to the embodiment.

23 shows a pattern portion pitch P1 of the light control member from 0.5 μm to 126.5 μm for each of the pitches P2 123, 126, 129, 132, 135, 138, and 141 μm of the display panels of the series 1 to 16. It is a graph of the measured coupling wavelength with increasing 0.5㎛ increments up to.

As can be seen in FIG. 23, when the pitch P1 of the pattern part of the light control member is 10 μm or less, regardless of the pitch P2 of the series and the display panel, all of the combination wavelengths are less than 2500 μm. You can see that it doesn't happen. That is, when the pitch P1 of the pattern portion of the light control member is designed to be 10 μm or less, the underside phenomenon can be controlled without considering the pitch of the display panel, the number of patterns of the light control member, and the number of pixels on the display panel. .

Below. A display device and a display device to which an optical path control member according to an exemplary embodiment is applied will be described with reference to FIGS. 24 and 25.

Referring to FIG. 24, the light path control member 1000 according to the embodiment may be disposed on the display panel 2000.

The display panel and the light path control member 1000 may be adhered to each other and disposed. For example, the display panel and the light path control member 1000 may be adhered to each other through an adhesive layer 1500 that transmits light. The adhesive layer 1500 may be transparent. For example, the adhesive layer 1500 may include an adhesive or an adhesive layer including an optically transparent adhesive material.

The display panel 2000 may include a first substrate 2100 and a second substrate 2200. When the display panel 2000 is a liquid crystal display panel, the display panel 2000 includes a first substrate 2100 including a thin film transistor (TFT) and a pixel electrode, and a second substrate including color filter layers. 2200 may be formed in a structure bonded with a liquid crystal layer therebetween.

In addition, in the display panel 2000, a thin film transistor, a color filter, and a black matrix are formed on the first substrate 2100, and the second substrate 2200 is bonded to the first substrate 2100 with a liquid crystal layer therebetween. It may be a liquid crystal display panel having a color filter on transistor (COT) structure. That is, a thin film transistor may be formed on the first substrate 2100, a protective layer may be formed on the thin film transistor, and a color filter layer may be formed on the protective layer. Further, a pixel electrode in contact with the thin film transistor is formed on the first substrate 2100. In this case, in order to improve the aperture ratio and simplify the mask process, the black matrix may be omitted, and the common electrode may be formed to serve as the black matrix.

In addition, when the display panel 2000 is a liquid crystal display panel, the display device may further include a backlight unit that provides light from a rear surface of the display panel 2000.

Alternatively, when the display panel 2000 is an organic light emitting display panel, the display panel 2000 may include a self-luminous device that does not require a separate light source. In the display panel 2000, a thin film transistor may be formed on a first substrate 2100, and an organic light emitting device in contact with the thin film transistor may be formed. The organic light-emitting device may include an anode, a cathode, and an organic light-emitting layer formed between the anode and the cathode. In addition, a second substrate 2200 serving as an encapsulation substrate for encapsulation on the organic light emitting device may be further included.

Further, although not shown in the drawings, a polarizing plate may be further disposed between the light path control member 1000 and the display panel 2000. The polarizing plate may be a linear polarizing plate or an anti-reflection polarizing plate. For example, when the display panel 2000 is a liquid crystal display panel, the polarizing plate may be a linear polarizing plate. In addition, when the display panel 2000 is an organic light emitting display panel, the polarizing plate may be a polarizing plate for preventing reflection of external light.

In addition, an additional functional layer 1300 such as an anti-haze layer, an anti-reflection layer, or anti-glare may be further disposed on the light path control member 1000. In detail, the functional layer 1300 may be adhered to one surface of the base substrate 100 of the light path control member. Although not shown in the drawings, the functional layer 1300 may be adhered to each other through the base substrate 100 and the adhesive layer of the light path control member. In addition, a release film for protecting the functional layer may be further disposed on the functional layer 1300.

In addition, a touch panel may be further disposed between the display panel and the light path control member.

In the drawings, it is illustrated that the light path control member is disposed above the display panel, but embodiments are not limited thereto, and the light control member is a position at which light can be adjusted, that is, a lower portion of the display panel or the display panel It may be disposed in various positions, such as between the upper and lower substrates of the.

Referring to FIG. 25, the optical path control member according to the embodiment may be applied to a vehicle.

Referring to FIG. 25, a display device to which an optical path control member according to an embodiment is applied may be disposed inside a vehicle.

For example, the display device according to the embodiment may display vehicle information and an image confirming a moving path of the vehicle. The display device 3100 may be disposed between a driver's seat and a passenger seat of a vehicle.

In addition, the optical path control member according to the embodiment may be applied to the instrument panel 3200 that displays a vehicle speed, an engine, and a warning signal.

In addition, the light path control member according to the embodiment may be applied to the windshield FG or the left and right window glass W of a vehicle.

Features, structures, effects, and the like described in the above-described 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 each embodiment may be combined or modified for other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

In addition, although the embodiments have been described above, these are only examples and do not limit the present invention, and those of ordinary skill in the field to which the present invention pertains are illustrated above within the scope not departing from the essential characteristics of the present embodiment. It will be seen that various modifications and applications that have not been made are possible. For example, each component specifically shown in the embodiments can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (20)

Base substrate;
A resin layer disposed on the base substrate; And
Including a plurality of pattern portions disposed on the base substrate,
The resin layer,
A first resin layer disposed on the base substrate;
A second resin layer disposed on the base substrate and alternately disposed with the first resin layer; And
Including a third resin layer disposed on the first resin layer and the second resin layer,
The pattern portion is disposed between the first resin layer and the second resin layer,
The width of the pattern portion is 100nm to 1000nm light path control member. The method of claim 1,
The pattern portion is a light path control member disposed surrounded by the first resin layer, the second resin layer and the third resin layer. The method of claim 1,
The second resin layer and the third resin layer contain the same material,
The first resin layer is a light path control member comprising a material different from the second resin layer and the third resin layer. The method of claim 3,
A light path control member in which a difference between the refractive index of the first resin layer, the refractive index of the second resin layer, and the refractive index of the third resin layer is 0.005 or less. The method of claim 1,
The pattern portion is a light path control member disposed to have an inclination with respect to one surface of the base substrate. The method of claim 1,
The light path control member including the pattern portion metal. The method of claim 6,
The pattern part is a light path control member including any one of chromium (Cr), titanium carbide (TiC), diamond like carbon (DLC), and graphite. The method of claim 1,
The pattern portion is a light path control member having a width of an upper portion of the pattern portion greater than a width of a lower portion of the pattern portion. The method of claim 8,
The pattern part extends from the upper part of the pattern part to the lower part of the pattern part, and the width of the pattern part decreases. The method of claim 1,
An optical path control member having an aspect ratio (thickness/width) of the pattern portion of 200 to 500. The method of claim 1,
The optical path control member having a pitch of the plurality of pattern portions is 10 μm or less. The method of claim 1,
The pattern portion is a light path control member disposed to extend in a vertical direction with respect to one surface of the base substrate. The method of claim 1,
The lower surface of the pattern part is in contact with the first resin layer,
The upper surface of the pattern portion is a light path control member in contact with the second resin layer. The method of claim 1,
The lower surface of the pattern part is in contact with the base substrate,
The upper surface of the pattern portion is a light path control member in contact with the second resin layer. Base substrate;
A resin layer disposed on the base substrate; And
Including a plurality of pattern portions disposed on the base substrate,
The resin layer,
A first resin layer disposed on the base substrate; And
And a second resin layer disposed on the base substrate and alternately disposed with the first resin layer,
The pattern portion is disposed between the first resin layer and the second resin layer,
The width of the pattern portion is 100nm to 1000nm light path control member. The method of claim 15,
A light path control member on which the upper surface of the pattern part is exposed and disposed. The method of claim 15,
The first resin layer and the second resin layer contain different materials,
A light path control member having a difference in refractive index between the first resin layer and the second resin layer of 0.005 or less. The method of claim 15,
An optical path control member in which an upper surface of the first resin layer and an upper surface of the second resin layer are positioned on the same plane. The method of claim 15,
The pattern part is a light path control member including any one of chromium (Cr), titanium carbide (TiC), diamond like carbon (DLC), and graphite. The method of claim 15,
The optical path control member having a pitch of the plurality of pattern portions is 10 μm or less.

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