TWI730831B - Manufacturing method of brightening film in transfer manner and brightening film - Google Patents

Abstract

The present invention provides a manufacturing method of brightening film in a transfer manner and a brightening film. The manufacturing method of brightening film includes manufacturing a brightening film transfer roller and rolling a light-transmitting film by the brightening film transfer roller to form the brightening film. A manufacturing process of the brightening film transfer roller includes coating a negative photoresist layer on an outer surface of a light-transmitting tube; providing a light source that is surrounded by a photomask and is configured to emit a pre-determined light shape through the photomask and be extended into the transparent tube so that the pre-determined light shape will pass through the light-transmitting tube and illuminate the negative photoresist layer; rotating the light-transmitting tube relative to the light source and photomask so that a part of the negative photoresist layer on the outer surface of the light-transmitting tube can be irradiated with the predetermined light shape to form a microstructure transfer layer; removing the other part of the negative photoresist layer that has not formed the microstructure transfer layer to constitute the brightening film transfer roller.

Description

Transfer type manufacturing method of brightness enhancement film and brightness enhancement film

The invention relates to a method for manufacturing a brightness enhancement film and a brightness enhancement film, in particular to a transfer type manufacturing method of the brightness enhancement film and a brightness enhancement film manufactured by the transfer type manufacturing method of the brightness enhancement film.

Existing brightness enhancement film manufacturing methods often require special manufacturing processes (such as diamond carving knife cutting). The above-mentioned special manufacturing processes often require a lot of money and time, which greatly increases the manufacturing time and manufacturing cost of the brightness enhancement film.

Therefore, how to overcome the above-mentioned shortcomings through the design and improvement of the manufacturing method of the brightness enhancement film has become one of the important issues to be solved by this business.

The embodiment of the present invention provides a transfer type manufacturing method of a brightness enhancement film and a brightness enhancement film for the shortcomings of the prior art, which can effectively improve the defects that may occur in the existing brightness enhancement film manufacturing method.

The embodiment of the present invention discloses a transfer type manufacturing method of a brightness enhancement film, which includes: a roller manufacturing step: manufacturing a brightness enhancement film transfer roller, and the manufacturing process includes: a coating step: a light-transmitting tube The outer surface is coated with a negative photoresist layer that surrounds 360 degrees; a light shape step: a light source is combined with a mask to jointly extend into the transparent tube, so that the light emitted by the light source can pass through The light shield passes through the light-transmitting round tube in a predetermined light shape and irradiates the negative photoresist layer; an exposure step: the light source and the light shield are opposed to the light-transmitting round tube Rotate so that a part of the negative photoresist layer adjacent to the outer surface of the light-transmitting tube can be irradiated by the light having the predetermined light shape to form a microstructure transfer Layer; and a developing step: removing another part of the negative photoresist layer where the microstructure transfer layer is not formed, so that the light-transmitting tube and the light-transmitting tube formed on the The microstructure transfer layers together constitute the brightness-enhancing film transfer roller; and a brightness-enhancing film transfer step: the brightness-enhancing film transfer roller is continuously rolled on a light-transmitting film, In this way, the light-transmitting film is formed with a plurality of micro-structures, thereby forming a brightness enhancement film.

The embodiment of the present invention discloses a brightness enhancement film, which is made by the transfer type manufacturing method of the above brightness enhancement film.

One of the beneficial effects of the present invention is that the transfer type manufacturing method of the brightness enhancement film and the brightness enhancement film provided by the present invention can make the light-transmitting tube and the brightness enhancement film through the "exposure step and the development step". The microstructure transfer layer formed on the light-transmitting tube together constitutes the brightness enhancement film transfer roller" and "the brightness enhancement film transfer step is based on the brightness enhancement film transfer roller not Rolling on the light-transmitting film intermittently, so that the light-transmitting film is formed with a plurality of microstructures, and then constitutes the "brightness enhancement film" technical solution, so as to greatly reduce the manufacturing of the brightness enhancement film Time and manufacturing cost.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings about the present invention. However, the provided drawings are only for reference and description, and are not used to limit the present invention.

The following are specific examples to illustrate the implementation of the "brightness enhancement film manufacturing method and brightness enhancement film" disclosed in the present invention. Those skilled in the art can understand the advantages of the present invention from the content disclosed in this specification. And effect. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although terms such as "first", "second", and "third" may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another, or one signal from another signal. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

Please refer to FIGS. 1 to 8B, which are embodiments of the present invention. It should be noted that the drawings corresponding to this embodiment and the related numbers and appearances mentioned in this embodiment are only used for specific description. The embodiments of the present invention are used to facilitate the understanding of the content of the present invention, rather than to limit the protection scope of the present invention.

The embodiment of the invention discloses a brightness enhancement film 500 and a transfer type manufacturing method of the brightness enhancement film. In order to facilitate the understanding of the structure of the brightness enhancement film 500, the following will first introduce the transfer type manufacturing method of the brightness enhancement film, and then explain the structure of the brightness enhancement film 500, but the brightness enhancement film of this embodiment 500 is not limited to being made according to this manufacturing method. Wherein, as shown in FIG. 1, the transfer manufacturing method of the brightness enhancement film includes a roller manufacturing step S1 and a brightness enhancement film transfer step S2 in this embodiment.

The manufacturing process of the roller manufacturing step S1 includes the following steps in sequence: a coating step S11, a light shaping step S12, an exposure step S13, and a developing step S14, but the invention is not limited to this. For example, in other embodiments not shown in the present invention, the roller manufacturing step S1 may further include a baking step connected to the developing step S14.

As shown in FIG. 1 and FIG. 2, the coating step S11 is to provide a light-transmitting circular tube 1, and coating the outer surface 12 of the light-transmitting circular tube 1 with a negative photoresist layer 2 surrounding 360 degrees. It should be noted that, in this embodiment, the light-transmitting circular tube 1 defines a central axis 11, and the light-transmitting circular tube 1 is made of soda lime glass, quartz glass, or acrylic glass, and other materials with transparent properties. The negative photoresist layer 2 is mainly made of materials such as polyisoprene rubber (Polyisoprene rubber) or epoxy-based polymer (Epoxy-based polymer), but the present invention is not limited to this. For example, the light-transmitting round tube 1 can also be made of other transparent materials such as Pyrex glass; the negative photoresist layer 2 can also be made of Thiol-enes (OSTE ) Polymer) and other negative photoresist materials.

As shown in FIGS. 1 and 3, the light shape step S12: provide a light source 200 and a light cover 300 that surrounds the light source 200 at intervals, and then the light source 200 is combined with the light cover 300 to extend into Inside the light-transmitting round tube 1, so that the light emitted by the light source 200 can pass through the mask 300, and pass through the light-transmitting round tube 1 in a predetermined light shape and irradiate the negative light.防层2。 Resistance layer 2. Wherein, the light source 200 can be used to emit ultraviolet light in this embodiment, and preferably includes at least one light-emitting diode chip capable of emitting between 340 nanometers (nm) and 410 nanometers, and at least One type of the light-emitting diode chip includes a laser diode chip, but the type of at least one light-emitting diode chip can be adjusted and changed according to design requirements, and the present invention is not limited thereto.

As shown in FIG. 3, the photomask 300 is a grayscale photomask in this embodiment, and the grayscale values of the photomask 300 are gradually distributed. Furthermore, the gray scales of the photomask 300 have obvious boundaries. The photomask 300 can control the predetermined light shape by adjusting its grayscale value distribution, but the invention is not limited to this. For example, the grayscale values of the mask 300 may also be continuously and progressively distributed. In other words, there is no obvious boundary between the gray levels of the photomask 300.

As shown in Figure 1, Figure 3 and Figure 4, the exposure step S13: Rotate the light source 200 and the mask 300 with respect to the light-transmitting tube 1 so as to be adjacent to the light-transmitting tube 1 A portion of the negative photoresist layer 2 of the outer surface 12 can be irradiated with the light having the predetermined light shape to form a microstructure transfer layer 3. Wherein, the transparent circular tube 1 rotates along the central axis 11, and when the transparent circular tube 1 rotates, the light source 200 and the light cover 300 move from one end of the transparent circular tube 1 To the other end.

It should be noted that, as shown in FIGS. 5A and 7A, in a cross section of the microstructure transfer layer 3 perpendicular to the central axis 11, the microstructure transfer layer 3 is in a closed shape. Moreover, the microstructure transfer layer 3 has a plurality of elongated structures 31 that are parallel to each other and connected in sequence. Wherein, each of the elongated structures 31 extends from one end to the other end of the light-transmitting round tube 1, and any two adjacent elongated structures 31 have the same height, but the present invention does not Limited to this. For example, as shown in FIG. 5B and FIG. 7B, any two adjacent elongated structures 31 may also have different heights; as shown in FIG. 7C and FIG. 7D, each of the elongated structures 31 31 may also surround the light-transmitting circular tube 1, and any two adjacent elongated structures 31 may have the same height, but the present invention is not limited to this. For example, in other embodiments not shown in the present invention, any two adjacent elongated structures 31 may also have different heights.

It should be noted that, as shown in FIGS. 5A and 5B, the widths of the cross-sections perpendicular to the long axis direction of any two adjacent elongated structures 31 are different, but the present invention is not limited to this. For example, in other embodiments not shown in the present invention, the width of the cross section perpendicular to the long axis direction of any two adjacent long strip structures 31 may be the same.

It should be noted that, as shown in FIGS. 7A to 7D, each of the elongated structures 31 is parallel to the central axis 11, and the longitudinal direction of any two adjacent elongated structures 31 is perpendicular to its longitudinal axis. The sections have different shapes. In more detail, in this embodiment, the cross-sections perpendicular to the long axis direction of any two adjacent elongated structures 31 have different triangles, but the present invention is not limited to this. For example, in other embodiments not shown in the present invention, the cross section perpendicular to the long axis direction of any two adjacent elongated structures 31 may also have a semicircle or a triangle.

It should be noted that the shape of any one of the elongated structures 31 is different corresponding to the gray scale value of the part of the photomask 300. Wherein, the part of the photomask 300 can be defined as a color block 301. Furthermore, the user can control the predetermined light shape by adjusting the grayscale value distribution of each color block 301, and then adjust the shape of the corresponding elongated structure 31. As shown in FIG. 5A and FIG. 5B, when the grayscale value distribution of each color block 301 is different, the microstructure transfer layer 3 correspondingly forms a variety of elongated structures 31 with different shapes.

For example, as shown in FIG. 6A, when the grayscale value of each color block 301 is roughly distributed in a deep-light-dark gradation, the negative photoresist irradiated with the predetermined light shape The part of the layer 2 forms an isosceles triangle structure. As shown in FIG. 6B, when the gray scale value of the partial section of each color block 301 changes sharply, the portion of the negative photoresist layer 2 irradiated with the predetermined light shape forms an asymmetric Triangle structure.

As shown in FIG. 6C and FIG. 6D, when the grayscale value of each color block 301 is approximately a continuous and progressive distribution of deep-light-deep, the negative photoresist layer irradiated with the predetermined light shape The part of 2 forms a semicircular structure. When the gray scale value of each color block 301 is continuously and gradually distributed from light to dark, the portion of the negative photoresist layer 2 irradiated with the predetermined light shape forms a right-angled triangle structure.

As shown in FIGS. 1, 7A and 7B, the developing step S14: remove another part of the negative photoresist layer 2 where the microstructure transfer layer 3 is not formed, so as to make the light transparent The round tube 1 and the microstructure transfer layer 3 formed on the light-transmitting round tube 1 together constitute a brightness enhancement film transfer roller 100. In this embodiment, a developer corresponding to the negative photoresist layer 2 can be used to dissolve another part of the negative photoresist layer 2 where the microstructure transfer layer 3 is not formed (that is, , The part of the negative photoresist layer 2) that is not irradiated by the light having the predetermined light shape.

As shown in FIGS. 1 and 8A, the brightness enhancement film transfer step S2: the brightness enhancement film transfer roller 100 is continuously rolled on a light-transmitting film 400 to make the light-transmitting film 400 A plurality of microstructures 501 are formed to form a brightness enhancement film 500. The above is the description of the transfer type manufacturing method of the brightness enhancement film of this embodiment, and the structure of the brightness enhancement film 500 in this embodiment will be described below, but the present invention is not limited thereto.

As shown in FIG. 8A, the brightening microstructure 501 of the brightness enhancement film 500 is continuously rolled on the light-transmitting film through a plurality of elongated structures 31 of the brightness enhancement film transfer roller 100 400 is formed, and the microstructures 501 are connected in sequence without interruption. Wherein, the number of the plurality of striped microstructures 501 of the brightness enhancement film 500 is greater than the number of the strips 31 of the striped microstructure transfer layer 3. It should be noted that in this embodiment, any two adjacent elongated structures 31 have the same height, so that any two adjacent scallop microstructures 501 have the same height, but The present invention is not limited to this. For example, as shown in FIG. 8B, any two adjacent strip-shaped structures 31 have different heights, so that any two adjacent striped microstructures 501 have different heights.

In addition, as shown in FIG. 7B and FIG. 8B, the embodiment of the present invention also discloses a brightness enhancement film transfer roller 100, which includes the light-transmitting circular tube 1 and the light-transmitting circular tube in order from the inside to the outside. The microstructure transfer layer 3 on the outer surface 12 of 1. The light-transmitting round tube 1 defines the central axis 11. The microstructure transfer layer 3 is formed by exposing the negative photoresist layer 2, and the microstructure transfer layer 3 is used to roll and transfer on the light-transmitting film 400 to form multiple strips. The faint microstructure 501 further constitutes the brightness enhancement film 500. Wherein, the microstructure transfer layer 3 includes a plurality of the elongated structures 31 each parallel to the central axis 11 and arranged in an annular shape, and any two of the elongated structures 31 are perpendicular to the central axis 11 The cross-sections of the adjacent elongated structures 31 have different shapes, but the present invention is not limited to this. For example, as shown in FIG. 7C and FIG. 7D, the microstructure transfer layer 3 may also include a plurality of the elongated structures 31 each perpendicular to the central axis 11.

In addition, as shown in FIG. 8B, the embodiment of the present invention also discloses a microstructure transfer layer 3 of a brightness enhancement film transfer roller 100, which is formed by exposing the negative photoresist layer 2 for use in the The light-transmitting film 400 rolls and transfers to form a plurality of 稜鏡 microstructures 501 to form the brightness enhancement film 500; wherein, the 稜鏡 microstructure transfer layer 3 includes multi-layers arranged parallel to each other and arranged in an annular shape. There are two elongated structures 31, and the cross-sections of any two adjacent elongated structures 31 perpendicular to their long axis directions have different shapes, but the present invention is not limited to this. For example, as shown in FIG. 7C and FIG. 7D, the microstructure transfer layer 3 may also include a plurality of the elongated structures 31 each perpendicular to the central axis 11.

[Beneficial effects of the embodiment]

One of the beneficial effects of the present invention is that the transfer type manufacturing method of the brightness enhancement film and the brightness enhancement film provided by the present invention can be transferred by "providing the brightness enhancement film with the microstructure transfer layer. "Printing roller" and "using the brightness enhancement film transfer roller to continuously roll on the light-transmitting film, so that the light-transmitting film is formed with a plurality of microstructures to form the brightness enhancement film "To greatly reduce the manufacturing time and manufacturing cost of the brightness enhancement film.

The content disclosed above is only the preferred and feasible embodiments of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the description and schematic content of the present invention are included in the application of the present invention. Within the scope of the patent.

100: Brightening film transfer roller 1: Translucent round tube 11: Central axis 12: Outer surface 2: Negative photoresist layer 3: 稜鏡 microstructure transfer layer 31: Long strip structure 200: light source 300: Mask 301: color block 400: Translucent film 500: Brightening film 501: 稜鏡 Microstructure S1: Roller manufacturing steps S11: Coating step S12: Light Shape Step S13: Exposure step S14: Development step S2: Brightening film transfer step

FIG. 1 is a schematic flow chart of the steps of a transfer type manufacturing method of a brightness enhancement film according to an embodiment of the present invention.

FIG. 2 is a three-dimensional schematic diagram of a light-transmitting round tube coated with a negative photoresist layer according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of the action of the light source and the light shield jointly extending into the light-transmitting circular tube according to the embodiment of the present invention.

FIG. 4 is a three-dimensional schematic diagram of the light-transmitting round tube illuminated by a predetermined light shape according to an embodiment of the present invention.

5A to 5B are schematic cross-sectional views taken along the line VA-VA in FIG. 4.

6A to 6D are schematic cross-sectional views of a strip structure according to an embodiment of the present invention.

7A to 7C are three-dimensional schematic diagrams of a brightness enhancement film transfer roller according to an embodiment of the present invention.

Fig. 7D is a schematic cross-sectional view of Fig. 7C along the line VIID.

8A to 8B are schematic diagrams of the movement of embossing the light-transmitting film with the brightness-enhancing film transfer roller according to an embodiment of the present invention.

S1: Roller manufacturing steps

S11: Coating step

S12: Light Shape Step

S13: Exposure step

S14: Development step

S2: Brightening film transfer step

Claims (9)

A transfer type manufacturing method of a brightness enhancement film, comprising: a roller manufacturing step: manufacturing a brightness enhancement film transfer roller, and the manufacturing process includes: a coating step: coating the outer surface of a light-transmitting tube around A negative photoresist layer of 360 degrees; a light shape step: a light source is combined with a light shield to jointly extend into the transparent circular tube, so that the light emitted by the light source can pass through the light shield, And pass through the light-transmitting tube in a predetermined light shape and irradiate the negative photoresist layer; an exposure step: rotate the light source and the mask relative to the light-transmitting tube to make adjacent A portion of the negative photoresist layer on the outer surface of the light-transmitting tube, which can be irradiated with the light having the predetermined light shape to form a microstructure transfer layer; and a developing Step: remove another part of the negative photoresist layer where the transfer layer of the microstructure is not formed, so that the light-transmitting circular tube and the microscopic microstructure formed on the light-transmitting tube The structural transfer layer jointly constitutes the brightness enhancement film transfer roller; and a brightness enhancement film transfer step: the brightness enhancement film transfer roller is continuously rolled on a transparent film to make the transparency The light film is formed with a plurality of microstructures to form a brightness enhancement film; wherein, during the manufacturing process of the brightness enhancement film transfer roller, the microstructure transfer layers are formed parallel to each other and in sequence A plurality of connected elongated structures; wherein, a plurality of the scallop microstructures are formed by rolling a plurality of elongated structures on the light-transmitting film uninterruptedly, and are connected in sequence without interruption. The transfer-type manufacturing method of the brightness enhancement film according to claim 1, wherein any two adjacent elongated structures have different heights, so that any two adjacent microstructures Have different heights. The transfer type manufacturing method of the brightness enhancement film according to claim 1, wherein the cross-sections perpendicular to the long axis direction of any two adjacent elongated structures have different shapes. The transfer type manufacturing method of the brightness enhancement film according to claim 1, wherein the cross sections perpendicular to the long axis direction of any two adjacent elongated structures have different triangles. The transfer-type manufacturing method of the brightness enhancement film according to claim 1, wherein the number of the plurality of the microstructures of the brightness enhancement film is greater than the number of the plurality of the microstructure transfer layers of the brightness enhancement film The number of long strips. The transfer-type manufacturing method of the brightness enhancement film according to claim 1, wherein the gray scale value of the mask portion corresponding to any one of the elongated structures is distributed gradually. The transfer-type manufacturing method of the brightness enhancement film according to claim 1, wherein the light-transmitting circular tube defines a central axis, and each of the elongated structures is parallel to the central axis. The transfer type manufacturing method of the brightness enhancement film according to claim 1, wherein the light source includes at least one light-emitting diode chip capable of emitting between 340 nanometers (nm) and 410 nanometers. A brightness enhancement film manufactured by the transfer type manufacturing method of the brightness enhancement film as described in claim 1.

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