KR102544196B1 - Optical film for improving side-visibility - Google Patents

Abstract

The present invention relates to an optical film for improving side visibility.

Description

Optical film for improving side visibility {OPTICAL FILM FOR IMPROVING SIDE-VISIBILITY}

The present invention relates to an optical film for improving side visibility.

There is a significant demand in the industry for an optical film capable of improving a lateral viewing angle, a lateral contrast ratio, and even black visibility.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an optical film for improving side visibility.

The present invention may also have as its object to achieve other objects that can be easily derived by a person of ordinary skill in the art from these objects and the overall description of this specification in addition to the above clear objects.

In order to achieve the above object, the optical film for improving side visibility of the present invention,

A plurality of pillar-shaped first structures formed in a spaced apart state, and

A first layer of a resin material having on an upper surface a second structure having a columnar shape formed between the first structures, and

A second layer covering the upper surface of the first layer,

The first layer is a pressure sensitive adhesive,

The refractive index of the second layer is greater than that of the first layer.

In addition, cross sections of the first structure and the second structure may be rounded rectangles.

And, the cross section of the first structure and the second structure may be a rounded trapezoid.

In addition, the height of the first structure may be higher than the height of the second structure.

Also, the ridge line width of the first structure may be 3 to 5 μm.

And, the width of the bottom surface of the first structure may be 8 to 10 μm.

And, the height of the first structure may be 8 to 12 ㎛.

And, the first structure may be formed one by one every 22 to 27 ㎛.

Also, an angle between the slope of the first structure and the first layer may be 100 to 105 degrees.

And, the width of the ridge line of the second structure may be 3 to 4 μm.

And, the width of the bottom surface of the second structure may be 5 to 7 μm.

And, the height of the second structure may be 4 to 6 ㎛.

And, the second structure may be formed one by one every 22 to 27 ㎛.

Also, an angle between the slope of the second structure and the first layer may be 100 to 105 degrees.

And, the refractive index of the first structure may be 1.46 to 1.48.

And, the refractive index of the second structure may be 1.58 to 1.60.

And, the first layer may be an ultraviolet curable urethane resin.

And, the second layer may be an ultraviolet curable fluororesin.

In addition, the optical film for improving side visibility of the present invention may be in contact with an optical panel.

According to the problem solving means of the present invention as described above, various effects including the following can be expected. However, the present invention is not established when all of the following effects are exerted.

The optical film for improving side visibility according to the present invention has the advantage of improving a side viewing angle, a side contrast ratio, and furthermore, black visibility.

1 is a cross-sectional view of an optical film for improving side visibility according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail.

However, the following is only a detailed description by exemplifying specific embodiments, and since the present invention may be variously changed and may have various forms, the present invention is not limited to the specific embodiments illustrated. It should be understood that the present invention includes all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In addition, in the following description, many specific details such as specific components are described, which are provided to help a more general understanding of the present invention, and it is common in the art that the present invention can be practiced without these specific details. It will be self-evident to those who have the knowledge of And, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

And, the terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

In this application, expressions in the singular number include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention.

In this application, terms such as 'comprise', 'include' or 'having' are intended to indicate that the features, components (or components), etc. described in the specification exist, but one or more other features or It does not mean that components or the like do not exist or cannot be added.

1 is a cross-sectional view of an optical film for improving side visibility according to an embodiment of the present invention.

The optical film for improving side visibility of the present invention, as shown in FIG. 1 to achieve the above object,

A plurality of columnar first structures 12 formed in a spaced apart state, and

A first layer 10 made of a resin material having a second structure 14 formed between the first structure 12 and having a columnar shape on an upper surface thereof, and

A second layer 20 covering the upper surface of the first layer 10,

The first layer 10 is a pressure sensitive adhesive,

The refractive index of the second layer (20) is greater than that of the first layer (10).

In addition, cross sections of the first structure 12 and the second structure 14 may be rounded rectangles.

In addition, cross sections of the first structure 12 and the second structure 14 may be trapezoidal rounded.

Also, the height of the first structure 12 may be higher than that of the second structure 14 .

Also, the ridge line width of the first structure 12 may be 3 to 5 μm.

And, the width of the bottom surface of the first structure 12 may be 8 to 10 μm.

Also, the height of the first structure 12 may be 8 to 12 μm.

And, the first structure 12 may be formed one by one every 22 to 27 ㎛.

In addition, the angle between the slope of the first structure 12 and the first layer 10 may be 100 to 105 degrees.

Also, the width of the ridge line of the second structure 14 may be 3 to 4 μm.

And, the width of the bottom surface of the second structure 14 may be 5 to 7 μm.

Also, the height of the second structure 14 may be 4 to 6 μm.

And, the second structures 14 may be formed one by one every 22 to 27 μm.

In addition, the angle between the slope of the second structure 14 and the first layer 10 may be 100 to 105 degrees.

And, the refractive index of the first structure 12 may be 1.46 to 1.48.

And, the refractive index of the second structure 14 may be 1.58 to 1.60.

And, the first layer 10 may be an ultraviolet curable urethane resin.

And, the second layer 20 may be an ultraviolet curable fluororesin.

When the above conditions are satisfied, the optical film for improving side visibility of the present invention can sufficiently improve the side viewing angle, side contrast ratio, and black visibility.

In addition, the optical film for improving side visibility of the present invention may be in contact with an optical panel.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications without departing from the gist of the present invention. Of course it is possible. Therefore, the scope of the present invention should not be construed as being limited to the above embodiments, and should be defined by not only the claims to be described later, but also those equivalent to these claims.

10: first layer
12: first structure
14: second structure
20: second layer

Claims (3)

A plurality of pillar-shaped first structures formed in a spaced apart state, and
A first layer of a resin material having on an upper surface a second structure having a columnar shape formed between the first structures, and
A second layer covering the upper surface of the first layer,
The first layer is a pressure sensitive adhesive,
The refractive index of the second layer is greater than the refractive index of the first layer,
Characterized in that the cross section of the first structure and the second structure is a rounded trapezoid,
Characterized in that the height of the first structure is higher than the height of the second structure,
The angle formed by the slope of the first structure and the first layer is 100 to 105 °,
The angle formed by the slope of the second structure and the first layer is 100 to 105 °,
The ridge line width of the first structure is 3 to 5 μm,
The bottom width of the first structure is 8 to 10 μm,
The height of the first structure is 8 to 12 μm,
The first structure is formed one by one every 22 to 27 μm,
The ridge line width of the second structure is 3 to 4 μm,
The bottom width of the second structure is 5 to 7 μm,
The height of the second structure is 4 to 6 μm,
The second structure is formed one by one every 22 to 27 μm,
Optical film for improving side visibility.
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