KR20120139280A - Optical assembly and backlight unit assembly - Google Patents

Abstract

PURPOSE: An elastic resin composition, optical element capable of preventing damages by adjacent optical film or optical sheets and a back light unit assembly are provided to facilitate handling and to maintain stable optical path. CONSTITUTION: An elastic resin composition comprises one or more compounds selected from chemical formulas 1, 2, 3, and 4. The content of one ore more compounds is 15-80 wt% based on the total resin composition. The optical member is a light guide plate which includes a structure layer in which patterns are formed on one or more surfaces of the substrate. The structure layer is a cured resin layer manufactured with the resin composition. The backlight unit assembly includes the optical member.

Description

Optical Assembly and Backlight Unit Assembly

The present invention relates to an optical member used in a liquid crystal display and a backlight unit assembly including the same.

BACKGROUND ART A liquid crystal display used as an optical display element is an indirect light emission method in which an image is controlled by controlling a transmittance of an external light source, and a backlight unit, which is a light source device, is used as an important component for determining characteristics of a liquid crystal display.

The backlight unit (hereinafter sometimes referred to as "BLU") may be a light source such as a cold cathode fluorescent lamp (CCFL) or an external electrofluorescent lamp (EEFL). The light emitted by the light is sequentially passed through the light guide plate or the diffusion plate, the diffusion sheet, and the prism sheet to reach the liquid crystal panel.

Here, the light guide plate is mounted in the case of the edge type backlight unit, and transmits the light emitted from the light source mounted on the side of the BLU to be distributed on the front surface of the flat liquid crystal panel, and the diffusion plate serves as a support for the films placed on the upper surface. While the light emitted from the light source mounted on the lower surface of the BLU diffuses the light through the diffuser plate to obtain a uniform light intensity across the entire screen to conceal the device such as the light source mounted on the lower part from the front Do this. In addition, the lower portion of the light guide plate or the diffuser plate is provided with a reflective sheet for increasing the use efficiency of the light source by allowing the light that is not delivered to the liquid crystal panel to be reflected and used again.

Recently, various flat panel display devices that can reduce the weight and volume, which are disadvantages of the cold cathode fluorescent lamp (CCFL) or the external electrode fluorescent lamp (EEFL), have emerged. Such flat panel displays include field emission displays (FEDs), plasma display panels (PDPs), and light emitting devices (LEDs). In particular, the use of LEDs (Light Emitting Diodes) is rapidly increasing. LEDs can improve color reproducibility without using toxic mercury (Ag) among the above-mentioned display devices. It maximizes energy efficiency and has excellent color reproducibility.

The direct type BLU that distributes LEDs on the bottom front of the BLU is able to realize excellent image quality, but it consumes a large number of LEDs and is high in price, and it requires high power consumption as a large number of LEDs are used. There are many problems that reduce the durability of the product. In addition, as the diffuser is positioned at regular intervals so that the LED placed on the back is not visible from the front, the thickness is relatively thicker than the edge type BLU, which has a disadvantage in terms of design.

Accordingly, the application range of the edge type BLU in which the LED light source is distributed on the side of the BLU is expanding.

Edge type BLU is manufactured by using a light guide plate so that light is distributed to the front surface by attaching a light source to one or more surfaces of the BLU. The light guide plate used in the edge-type BLU has a pattern formed so that light incident from a light source located at the side of the edge type BLU can be emitted toward the front of the LCD panel.

The printing method is the oldest light guide plate rear processing method and has the shortest processing time among the current mass production methods. It is also the most popular technology due to low equipment price and high productivity. However, by using a mask made of silk screen, such a mask is abruptly shortened in life with use, and exhibits relatively low luminance as compared to other processes. In addition, there are various failure factors such as the screen shaking during the operation, resulting in a relatively low yield. In addition, most of the resins used include chlorine groups, and thus suffer from harmful processes. Mold injection method is basically a method of making a mold made of a shape that can be injected relatively inexpensive. However, the backside machining time is relatively long and there is a need to bear the high mold cost. In addition, in order to manufacture the optimized shape, the mold must be repeatedly made many times, which requires a long development period and requires expensive equipment. In addition, a method for securing uniformity necessary for large area is under development, and it is difficult to apply it to a large light guide plate. V-cutting is a V-shaped machine that processes prisms that are connected to or separated from the back of the light guide plate, and can achieve higher luminance than the printing method. However, since the prism line pattern must be formed one line for each light guide plate, a long processing time is required and the productivity is very low. Recently, laser processing is the most preferred method for the backside of the light guide plate, which has a longer processing time than other backside processing methods, but it is possible to realize high brightness and to produce a product immediately by adjusting only a program. It is short and works without direct contact with the light guide plate itself, so that it is possible to reduce defects and to process precise patterns. However, such laser processing also requires a lot of processing time since the individual line patterns must be carved out one by one.

In order to overcome the low luminance or long working time found in these various processing methods, there is an imprinting method as a new research method. This is to make a mold of the shape opposite to the desired shape and then to cure the resin on the light guide plate by using ultraviolet rays, heat, etc. It takes a certain time to make the initial mold, but relatively stable quality and low It is known that the defective rate is shown and the desired shape can be made into various molds, and the effect is high also for improving the luminance.

However, this imprinting method reduces the overall brightness due to repetitive friction or impact of the resin layer formed on the light guide plate due to repetitive friction or impact on the lower surface of the light guide plate. This may cause a poor quality of the product, and may also cause a defect in the whole product.

In addition, the conventional light guide plate has been used a light guide plate of the state without any form of processing on the upper surface.

The light guide plate has relatively low luminance because light emitted to the upper surface is scattered in all directions. In order to overcome this, recently, a polygonal, semi-circular or semi-elliptic polyhedron or columnar shape is applied to the upper surface of the light guide plate. When processing a polygonal, semi-circular or semi-elliptic polyhedron or column shape on the upper surface of the light guide plate, the light incident from the side is condensed to the front through the polyhedron or column shape acting as a kind of lens. The effect of improving the uniformity of. In addition, when formed in a columnar shape, it acts as a kind of optical path to enable screen division driving, and high contrast ratio can be realized even in edge type BLUs such as direct type BLUs to realize high image quality.

The polyhedron or columnar pattern formed on the upper surface of the light guide plate is most advantageous because it is not necessary to make a separate polyhedron or columnar pattern when the light guide plate is made at the same time in the injection or extrusion process. However, such an injection or extrusion process requires a higher process precision and uniformity than a process of simply making a patternless light guide plate, which includes a lot of defect occurrence conditions, which may cause a low yield, and may be produced in an injection or extrusion process. In the case of making a complicated shape without a pattern, it is necessary to form a pattern using a separate photocurable resin or a thermosetting resin.

The pattern of the upper surface is also damaged by the resin layer formed on the light guide plate due to repetitive friction or impact with the optical film of the upper surface to reduce the overall brightness, and to generate defects that may appear by intensively damaging the pattern at a specific position.

According to the present invention, when the optical member including the patterned structural layer is applied to a display, the patterned structural layer is not damaged by an adjacent optical sheet or an optical film, so as to be easily handled, and a stable optical path is provided. An object of the present invention is to provide an elastic resin composition and an optical member made of the resin composition, which can be maintained to prevent a decrease in luminance.

Accordingly, the present invention provides a resin composition comprising any one or more compounds of the following Chemical Formulas 1, 2, 3 and 4 as a preferred embodiment.

Formula 1

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

R ₇ and R ₈ may be the same as or different from each other as —H or an alkyl group having 1 to 15 carbon atoms,

d is an integer from 0 to 25,

Except that a = b = 0.

(2)

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

w is an integer from 1 to 20,

Except that a = b = 0.

(3)

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

v is an integer from 1 to 20,

Except that a = b = 0.

Formula 4

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

이고, R₆는 -H 또는 탄소수 1 ~ 15의 알킬기이고, c는 0 ~ 25 사이의 정수이고, x는 1 ~ 20 사이의 정수이며,R ₃ is

R ₆ is -H or an alkyl group having 1 to 15 carbon atoms, c is an integer of 0 to 25, x is an integer of 1 to 20,

R ₉ is —H or an alkyl group having 1 to 15 carbon atoms,

Except that a = b = c = 0.

As a second preferred embodiment of the present invention, a light guide plate including a substrate layer and a structure layer having a pattern formed on a surface of at least one surface of the substrate layer, wherein the structure layer is any one or more of the following Chemical Formulas 1, 2, 3 and 4 It provides an optical member, characterized in that the resin cured layer made of a resin composition comprising a compound.

Formula 1

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

R ₇ and R ₈ may be the same as or different from each other as —H or an alkyl group having 1 to 15 carbon atoms,

d is an integer from 0 to 25,

Except that a = b = 0.

(2)

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

w is an integer from 1 to 20,

Except that a = b = 0.

(3)

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

v is an integer from 1 to 20,

Except that a = b = 0.

Formula 4

here,

이고, R₄는 HR ₁ is

R ₄ is H

 Or an alkyl group having 1 to 15 carbon atoms, a is an integer from 0 to 25, z is an integer from 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

이고, R₆는 -H 또는 탄소수 1 ~ 15의 알킬기이고, c는 0 ~ 25 사이의 정수이고, x는 1 ~ 20 사이의 정수이며,R ₃ is

R ₆ is -H or an alkyl group having 1 to 15 carbon atoms, c is an integer of 0 to 25, x is an integer of 1 to 20,

R ₉ is —H or an alkyl group having 1 to 15 carbon atoms,

Except that a = b = c = 0.

In the optical member according to the embodiment, the elastic recovery rate expressed by Equation 1 may be 80% or more.

Equation  One

In the above formula, D ₁ means the depth that is compressed by the external pressure is applied, D ₂ is the difference between the height of the optical member and the height of the optical member when the external pressure is removed to recover the external pressure is applied. it means.

The pattern according to the embodiment has a polyhedron shape, the shape of which is selected from among polygon, semi-circle and semi-ellipse in cross section; A columnar shape in which the cross section is selected from polygonal, semi-circular and semi-elliptic; And the cross-section may be selected from the group consisting of a curved column shape selected from polygonal, semi-circular and semi-elliptic.

The content of the resin composition including any one or more of Chemical Formulas 1, 2, 3, and 4 according to the embodiment may be 5 to 99% by weight based on the total resin forming the structural layer.

Optical member according to the embodiment may be made of a material selected from the group consisting of polycarbonate resin, polystyrene resin, acrylic resin, olefin resin, copolymers thereof, mixtures thereof and derivatives thereof.

As a third preferred embodiment of the present invention, a backlight unit assembly including the optical member is provided.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a resin composition comprising a compound of any one or more of the formulas (1), (2), (3) and (4) as a material that enables the optical member to exhibit elasticity.

Formula 1

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

R ₇ and R ₈ may be the same as or different from each other as —H or an alkyl group having 1 to 15 carbon atoms,

d is an integer from 0 to 25,

Except that a = b = 0.

(2)

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

w is an integer from 1 to 20,

Except that a = b = 0.

(3)

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

v is an integer from 1 to 20,

Except that a = b = 0.

Formula 4

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

이고, R₆는 -H 또는 탄소수 1 ~ 15의 알킬기이고, c는 0 ~ 25 사이의 정수이고, x는 1 ~ 20 사이의 정수이며,R ₃ is

R ₆ is -H or an alkyl group having 1 to 15 carbon atoms, c is an integer of 0 to 25, x is an integer of 1 to 20,

R ₉ is —H or an alkyl group having 1 to 15 carbon atoms,

Except for a = b = c0.

In the resin composition, the content of any one or more of the compounds of Formulas 1, 2, 3 and 4 may be 15 to 80% by weight relative to the total resin composition in consideration of elasticity and scratch resistance, and, When two or more compounds represented by 2, 3, and 4 are used simultaneously, the content of each compound may be 5% by weight or more based on the total resin composition.

The present invention also provides an optical member comprising a base layer and a structural layer having a pattern formed on at least one surface of the base layer, wherein the structural layer comprises a resin composition comprising any one or more compounds of the following Chemical Formulas 1, 2, 3 and 4 It relates to an optical member, characterized in that the resin cured layer prepared by.

Formula 1

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

R ₇ and R ₈ may be the same as or different from each other as —H or an alkyl group having 1 to 15 carbon atoms,

d is an integer from 0 to 25,

Except that a = b = 0.

(2)

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

w is an integer from 1 to 20,

Except that a = b = 0.

(3)

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

v is an integer from 1 to 20,

Except that a = b = 0.

Formula 4

here,

이고, R₄는 -H 또는 탄소수 1 ~ 15의 알킬기이고, a는 0 ~ 25 사이의 정수이고, z는 1 ~ 20 사이의 정수이고,R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

이고, R₅는 -H 또는 탄소수 1 ~ 15의 알킬기이고, b는 0 ~ 25 사이의 정수이고, y는 1 ~ 20 사이의 정수이고,R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,

이고, R₆는 -H 또는 탄소수 1 ~ 15의 알킬기이고, c는 0 ~ 25 사이의 정수이고, x는 1 ~ 20 사이의 정수이며,R ₃ is

R ₆ is -H or an alkyl group having 1 to 15 carbon atoms, c is an integer of 0 to 25, x is an integer of 1 to 20,

R ₉ is —H or an alkyl group having 1 to 15 carbon atoms,

Except that a = b = c = 0.

The compounds of Formulas 1, 2, 3 and 4 are each a compound having a molecular weight of 100 ~ 10,000, and cured by adjusting the type and length of the flexible alkylene oxide chain in the molecular structure to improve the elastic modulus to improve the base layer and the structural layer It is preferable to form the structural layer of the optical member containing.

The optical member including a structural layer, which is a resin cured layer made of a resin composition containing any one or more of the compounds of Formulas 1, 2, 3, and 4, is 0.2031 mN / using a planar indenter on the upper surface of the structure layer pattern surface. When pressing the pressure up to the maximum compression force 1g _f at a pressing speed of sec, and stops compression for 5 seconds when reaching the maximum compression force, and releases the compression force, the elastic recovery rate expressed by Equation 1 may be 80% or more.

Equation  One

In the above formula, D ₁ means the depth that is compressed by the external pressure is applied, D ₂ is the difference between the height of the optical member and the height of the optical member when the external pressure is removed to recover the external pressure is applied. it means.

The alkylene glycol structure in Formula 1 increases the modulus of elasticity, and when used as Formulas 2, 3, and 4 when forming the structure layer, satisfies the optical properties while satisfying the elastic recovery rate.

The patterned structure layer is partially concentrated due to the force given from the outside, so that damage due to friction or impact may easily occur. However, when the resin composition is used, the structural layer is easily deformed and then easily restored, so that the external impact is not easily damaged. Do not.

In addition, even if the hardness of the optical member is not improved by simply improving the hardness, it does not damage other optical components unlike the case where the adjacent optical film or the reflective sheet is damaged.

On the other hand, the pattern is a polyhedron shape of which the cross-section is selected from polygonal, semi-circular and semi-elliptic; A columnar shape in which the cross section is selected from polygonal, semi-circular and semi-elliptic; And the cross section may be selected from the group consisting of a curved column shape selected from polygonal, semi-circular and semi-elliptic, but is not limited thereto.

The resin composition for forming the structural layer applied to the present invention contains 5 to 99% by weight, preferably 20 to 80% by weight, based on the total resin for forming the structural layer. At this time, if less than 5% by weight, the increase in elastic recovery rate is minimal. In addition to the above resins, light or thermal curing agents, initiators and the like may be included.

The optical member of the present invention may be prepared by adding an additive such as a curing agent and an initiator to the resins of Chemical Formulas 1, 2, 3, and 4 to prepare a liquid composition, coating the substrate layer of the optical member, and curing the same.

In addition, the optical member of the present invention includes a structural layer having a plurality of three-dimensional structures on any one or more of the upper and lower surfaces of the optical member, the surface of the structure is a resin cured layer structured, the cross section of the structural layer is polygonal, semi-circular or semi-elliptic It may be a polyhedron shape, or may be a column shape having a polygonal, semi-circular or semi-elliptical cross section, or a structural layer formed with a plurality of patterns selected from a plurality of curved column shapes having a polygonal, semi-circular or semi-elliptic cross section. It may be.

Such an optical member may be a light guide plate, a prism film, or the like. When applied to a backlight unit assembly, the optical member may prevent damage due to an adjacent optical film or an optical sheet due to the elasticity of the structural layer of the optical member. In addition, it is possible to maintain a stable optical path to prevent the luminance decrease.

The present invention will now be described in detail with reference to specific examples. However, it should be understood that the present invention is not limited to these embodiments and that various changes and modifications may be made therein without departing from the scope of the present invention. Of course.

Synthetic example  1-1 to 1-10

1.05 mol of Compound R ₁ was added to 1 mol of the compound represented by Chemical Formula 5 in a reaction vessel, and the reaction was performed under reflux for 6 hours under a tetrahydrofuran solvent. Thereafter, 1.05 moles of Compound R ₂ were added to the mixture to reflux for 6 hours. After the reaction, the unreacted material and the solvent were distilled off under reduced pressure to synthesize a compound represented by Chemical Formula 1. The parameters of each compound in Synthesis Examples 1-1 to 1-10 are as described in Table 1.

[Chemical Formula 5]

Cl- [CR ₇ R ₈ ] _d -Cl

Here, R ₇ and R ₈ may each be the same as or different from each other as -H or an alkyl group having 1 to 15 carbon atoms, and d is an integer between 0 and 25.

R ₁ is CH ₂ = CR ₄ COO — [(CH ₂ ) _z O] _a -H, a is an integer from 0 to 25, and z is an integer from 1 to 20.

R ₂ is CH ₂ = CR ₅ COO-[(CH ₂ ) _y O] _b -H, b is an integer from 0 to 25, y is an integer from 1 to 20,

Except that a = b = 0.

Synthetic example R ₄ R ₅ R ₇ R ₈ z y a b d 1-1 H H H H 2 2 5 5 2 1-2 H H H CH ₃ 2 3 7 2 3 1-3 H H CH ₃ CH ₃ One 2 8 8 4 1-4 CH ₃ H CH ₃ CH ₃ 2 2 5 5 2 1-5 CH ₃ CH ₃ H CH ₃ One One 8 3 4 1-6 H H H H One One 5 One 5 1-7 H H H CH ₃ 2 One 3 7 2 1-8 H H CH ₃ CH ₃ 3 One 9 5 3 1-9 CH ₃ H CH ₃ CH ₃ 3 2 10 One 5 1-10 CH ₃ CH ₃ H CH ₃ One 3 11 10 5

Synthetic example  2-1 to 2-5

Put the R ₁ of 1.05 mol Compound 1 mole represented by the general formula (6) in a reaction vessel under a tetrahydrofuran solvent and was stirred in after the 50 ℃ completely added dropwise, taking care not to exceed two hours at room temperature progress the reaction, R ₂ to 1.05 moles In addition, the reaction proceeded. Unreacted material and solvent were removed by distillation under reduced pressure to synthesize a compound represented by the formula (2). The parameters of each compound in Synthesis Examples 2-1 to 2-5 are as described in Table 2.

[Formula 6]

OCN-C ₆ H _4- (CH ₂ ) w C ₆ H ₄ -NCO

Where w is an integer between 1 and 20.

R ₁ is CH ₂ = CR ₄ COO — [(CH ₂ ) _z O] _a -H, a is an integer from 0 to 25, and z is an integer from 1 to 20.

R ₂ is CH ₂ = CR ₅ COO-[(CH ₂ ) _y O] _b -H, b is an integer from 0 to 25, y is an integer from 1 to 20,

Except that a = b = 0.

Synthetic example R ₄ R ₅ z y w a b 2-1 H H 2 2 2 5 2 2-2 H CH ₃ 2 3 3 2 3 2-3 H CH ₃ One 2 4 8 4 2-4 CH ₃ H 2 2 4 5 2 2-5 CH ₃ CH ₃ One One 6 3 4

Synthetic example  3-1 to 3-7

Formula _{7 OCN- (CH 2) v-} NCO compounds into the R ₁ 1.05 mol to 1 mol of the reaction vessel under tetrahydro-furan solvent was stirred in after the 50 ℃ completely added dropwise, taking care not to exceed two hours at room temperature and the reaction proceeds , R ₂ 1.05 mol was added to proceed with the reaction. Unreacted material and solvent were removed by distillation under reduced pressure to synthesize a compound represented by the formula (3). The parameters of each compound in Synthesis Examples 3-1 to 3-7 are as described in Table 3.

[Formula 7]

OCN- (CH ₂ ) v-NCO

Where v is an integer between 1 and 20.

R ₁ is CH ₂ = CR ₄ COO — [(CH ₂ ) _z O] _a -H, a is an integer from 0 to 25, and z is an integer from 1 to 20.

R ₂ is CH ₂ = CR ₅ COO-[(CH ₂ ) _y O] _b -H, b is an integer from 0 to 25, y is an integer from 1 to 20,

Except that a = b = 0.

Synthetic example R ₄ R ₅ z y v a b 3-1 H H 2 2 2 6 7 3-2 H CH ₃ 2 3 3 9 5 3-3 H CH ₃ One 4 5 4 5 3-4 CH ₃ H 2 2 5 5 5 3-5 CH ₃ H 3 5 3 5 3 3-6 CH ₃ CH ₃ One 5 2 8 2 3-7 CH ₃ CH ₃ 4 4 2 3 2

Synthetic example  4-1 to 4-10

1.05 mol of R ₁ CH ₂ = CR ₄ COO-[(CH ₂ ) _z O] _a -H was added to 1 mol of the compound represented by the formula (8) in a reaction vessel, and completely added dropwise while being careful not to exceed 50 ° C under a tetrahydrofuran solvent. After stirring for 2 hours at room temperature, the reaction proceeds, and sequentially R ₂ CH ₂ = CR ₅ COO-[(CH ₂ ) _y O] _b -H 1.05 mol, R ₃ CH ₂ = CR ₆ COO-[(CH ₂ ) _x O] _c -H 1.05 mol was added at intervals of two hours to proceed with the reaction. Unreacted material and solvent were removed by distillation under reduced pressure to synthesize a compound represented by the formula (4). The parameters of each compound in Synthesis Examples 4-1 to 4-10 are as described in Table 4.

[Formula 8]

R ₉ is —H or an alkyl group having 1 to 15 carbon atoms.

R ₁ is CH ₂ = CR ₄ COO — [(CH ₂ ) _z O] _a -H, a is an integer from 0 to 25, and z is an integer from 1 to 20.

R ₂ is CH ₂ = CR ₅ COO — [(CH ₂ ) _y O] _b -H, b is an integer between 0 and 25, and y is an integer between 1 and 20.

R ₃ is CH ₂ = CR ₆ COO-[(CH ₂ ) _x O] _c -H, c is an integer from 0 to 25, x is an integer from 1 to 20,

Except that a = b = 0.

Synthetic example R ₄ R ₅ R ₆ R ₉ z y x a b c 4-1 H H CH ₃ CH ₃ 2 One 2 2 5 9 4-2 H CH ₃ H CH ₃ 2 One 2 3 3 8 4-3 H CH ₃ CH ₃ H 3 One 2 4 7 8 4-4 CH ₃ H CH ₃ CH ₃ 3 3 2 5 5 8 4-5 CH ₃ CH ₃ H CH ₃ One 3 2 8 5 7 4-6 H H H H One 3 One 7 8 5 4-7 CH ₃ CH ₃ H CH ₃ 2 3 One 9 6 4 4-8 H H CH ₃ H 2 3 One 9 8 3 4-9 CH ₃ H CH ₃ CH ₃ 3 5 One 8 8 3 4-10 CH ₃ CH ₃ H H 3 5 One 9 9 3

Synthetic example  5-1 to 5-4

Formula _{5 Cl- [CR 7 R 8]} d -Cl compounds into the R ₁ to 1.05 mol per mol in the reactor vessel was carried out for 6 hours under reflux the reaction solvent is tetrahydrofuran. Thereafter, 1.05 mol of R ₂ was added to proceed with reflux for 6 hours. After the reaction, the unreacted material and the solvent were distilled off under reduced pressure to synthesize a compound. The parameters of each compound in Synthesis Examples 5-1 to 5-4 are as described in Table 5.

[Chemical Formula 5]

Cl- [CR ₇ R ₈ ] _d -Cl

Here, R ₇ and R ₈ may each be the same as or different from each other as -H or an alkyl group having 1 to 15 carbon atoms, and d is an integer between 0 and 25.

R ₁ is CH ₂ = CR ₄ COO — [(CH ₂ ) _z O] _a -H, a is an integer from 0 to 25, and z is an integer from 1 to 20.

R ₂ is CH ₂ = CR ₅ COO — [(CH ₂ ) _y O] _b -H, b is an integer between 0 and 25, and y is an integer between 1 and 20.

Synthetic example R ₄ R ₅ R ₇ R ₈ a b d 5-1 H H H H 0 0 10 5-2 H H CH ₃ CH ₃ 0 0 8 5-3 H H CH ₃ CH ₃ 0 0 12 5-4 CH ₃ CH ₃ CH ₃ CH ₃ 0 0 12

Example  1 to 32

40 wt% of butyl acrylate and hydroxy ethyl acrylate based on 40 wt% of the compounds prepared in Synthesis Examples 1-1 to 4-10 above based on 100 wt% of the total composition

(hydroxyethyl acrylate) 18% by weight, photoinitiator benzophenone (1% by weight)

Water Aldrich), Irgacure 184C (Ciba) 1% by weight was mixed at room temperature.

A pattern was formed by curing the above resin in a mold having a plurality of fine prism shapes having a pitch of 30 μm and a height of 15 μm on a PMMA light guide plate (manufactured by KOLON, 3 mm) as a substrate layer.

Comparative example  1-4

40 wt% of butyl acrylate (hydroxybutyl acrylate) to 40 wt% of the compounds prepared in Synthesis Examples 5-1 to 5-4 based on 100 wt% of the total composition

(hydroxyethyl acrylate) 18% by weight, photoinitiator benzophenone (1% by weight)

Water Aldrich), Irgacure 184C (Ciba) 1% by weight was mixed at room temperature.

A pattern was formed by curing the above resin in a mold having a plurality of fine prism shapes having a pitch of 200 μm and a height of 100 μm on a PMMA light guide plate (manufactured by KOLON, 3 mm) as a base material layer.

The elastic recovery rate and scratch resistance of the light guide plates manufactured in Examples 1 to 32 and Comparative Examples 1 to 4 were measured as follows, and the results are shown in Table 6.

(1) elastic recovery rate

Examples and Comparative Examples of the pattern portion of the light guide plate is manufactured using the D 'Load-Unload test' item using the smiling compression hardness tester manufactured by Shimadzu Corporation in Japan (Shimadzu DUH-W201S) ₁ and the elastic recovery was measured at. After placing the pointed part of the mountain in the light guide plate structure layer at the center of the planar indenter having a diameter of 50 μm, under the following conditions, D ₁ , D ₂ And the elastic recovery rate is repeated five times and the average value is obtained.

Here, D ₁ means the depth that is compressed by the external pressure is applied, D ₂ means the difference between the height of the light guide plate in the state without the external pressure and the height of the light guide plate when the external pressure is removed.

[Measuring conditions]

a. Maximum compressive force applied: 1g _f (= 9.807mN)

b. Compression force per hour: 0.2031mN / sec

c. Stop time at maximum compression: 5 sec

(2) scratch resistance

When a minimum pressure was applied to the pattern portion of the light guide plate manufactured in the above Examples and Comparative Examples using the basic weight of the Big Heart test apparatus of IMOTO, the scratches of the structural layer were measured. The degree of damage was visually judged and the criteria are as follows.

Bad scratch resistance ← × <△ <○ <◎ → Excellent scratch resistance

Initial pattern height (um) D1 (um) D2 (um) Elastic recovery rate (%) Scratch resistance Example 1 100 7.842 1.280 83.7% ◎ Example 2 100 7.689 1.094 85.8% ◎ Example 3 100 7.599 1.013 86.7% ◎ Example 4 100 7.598 1.184 84.4% ◎ Example 5 100 7.846 1.209 84.6% ◎ Example 6 100 7.198 1.423 80.2% ○ Example 7 100 7.694 1.276 83.4% ◎ Example 8 100 7.592 1.348 82.2% ◎ Example 9 100 7.384 1.240 83.2% ◎ Example 10 100 7.094 1.094 84.6% ◎ Example 11 100 7.543 1.243 83.5% ◎ Example 12 100 7.419 1.302 82.5% ◎ Example 13 100 7.192 1.286 82.1% ◎ Example 14 100 7.913 1.220 84.6% ◎ Example 15 100 7.840 1.432 81.7% ○ Example 16 100 7.019 1.273 81.9% ◎ Example 17 100 7.164 1.042 85.5% ◎ Example 18 100 7.549 1.118 85.2% ◎ Example 19 100 7.359 1.194 83.8% ◎ Example 20 100 7.642 1.280 83.3% ◎ Example 21 100 7.448 1.243 83.3% ◎ Example 22 100 7.418 1.009 86.4% ◎ Example 23 100 7.628 1.432 81.2% ○ Example 24 100 7.945 1.416 82.2% ◎ Example 25 100 7.594 1.093 85.6% ◎ Example 26 100 7.149 1.432 80.0% ◎ Example 27 100 7.546 1.413 81.3% ◎ Example 28 100 7.184 1.091 84.8% ◎ Example 29 100 7.814 1.223 84.3% ◎ Example 30 100 7.643 1.421 81.4% ◎ Example 31 100 7.031 1.043 85.2% ◎ Example 32 100 7.094 1.394 80.3% ○ Comparative Example 1 100 7.943 3.418 57.0% × Comparative Example 2 100 7.188 3.912 45.6% × Comparative Example 3 100 7.840 2.843 63.7% △ Comparative Example 4 100 7.642 3.712 51.4% ×

As a result of measuring the physical properties, it can be seen that the pattern made of the resin composition including at least one selected from Chemical Formulas 1, 2, 3, and 4 in the light guide plate has an elastic recovery rate of 80% or more and excellent scratch resistance.

Claims (8)

Resin composition comprising a compound of any one or more of the following formula (1), (2), (3) and (4).

Formula 1

here,
R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,

R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,
R ₇ and R ₈ may be the same as or different from each other as —H or an alkyl group having 1 to 15 carbon atoms,
d is an integer from 0 to 25,
Except that a = b = 0.

(2)

here,
R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,
R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,
w is an integer from 1 to 20,
Except that a = b = 0.

(3)

here,
R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,
R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,
v is an integer from 1 to 20,
Except that a = b = 0.

Formula 4

here,
R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,
R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,
R ₃ is

R ₆ is -H or an alkyl group having 1 to 15 carbon atoms, c is an integer of 0 to 25, x is an integer of 1 to 20,
R ₉ is —H or an alkyl group having 1 to 15 carbon atoms,
Except that a = b = c = 0.
The method of claim 1,
The content of any one or more of the compounds of Formulas 1, 2, 3 and 4 is a resin composition, characterized in that 15 to 80% by weight relative to the total resin composition.
A light guide plate comprising a substrate layer and a structural layer having a pattern formed on at least one surface of the substrate layer,
The structural layer is an optical member, characterized in that the resin cured layer made of a resin composition containing any one or more compounds of the following formula (1), (2), (3) and (4).

Formula 1

here,
R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,
R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,
R ₇ and R ₈ may be the same as or different from each other as —H or an alkyl group having 1 to 15 carbon atoms,
d is an integer from 0 to 25,
Except that a = b = 0.

(2)

here,
R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,
R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,
w is an integer from 1 to 20,
Except that a = b = 0.

(3)

here,
R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,
R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,
v is an integer from 1 to 20,
Except that a = b = 0.

Formula 4

here,
R ₁ is

R ₄ is -H or an alkyl group having 1 to 15 carbon atoms, a is an integer of 0 to 25, z is an integer of 1 to 20,
R ₂ is

R ₅ is -H or an alkyl group having 1 to 15 carbon atoms, b is an integer of 0 to 25, y is an integer of 1 to 20,
R ₃ is

R ₆ is -H or an alkyl group having 1 to 15 carbon atoms, c is an integer of 0 to 25, x is an integer of 1 to 20,
R ₉ is —H or an alkyl group having 1 to 15 carbon atoms,
Except that a = b = c = 0.
The method of claim 3,
An optical member having an elastic recovery rate of 80% or more represented by Equation 1.
Equation 1

In the above formula, D ₁ means the depth that is compressed by the external pressure is applied, D ₂ is the difference between the height of the optical member and the height of the optical member when the external pressure is removed to recover the external pressure is applied. it means.
The method of claim 3,
The pattern may have a polyhedron shape whose cross section is selected from a polygon, a semicircle and a semi-ellipse; A columnar shape in which the cross section is selected from polygonal, semi-circular and semi-elliptic; And a cross section having a curved column shape selected from polygonal, semi-circular and semi-elliptic shapes.
The method of claim 3,
The content of the resin composition comprising any one or more of Formulas 1, 2, 3, and 4 is an optical member, characterized in that 5 to 99% by weight based on the total resin forming the structural layer.
The method of claim 3,
The optical member is made of a material selected from the group consisting of polycarbonate resin, polystyrene resin, acrylic resin, olefin resin, copolymers thereof, mixtures thereof and derivatives thereof.
A backlight unit assembly comprising the optical member of any one of claims 1 to 7.