CN113917583B - Transfer printing type manufacturing method of brightness enhancement film and brightness enhancement film - Google Patents
Transfer printing type manufacturing method of brightness enhancement film and brightness enhancement film Download PDFInfo
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- CN113917583B CN113917583B CN202010655547.0A CN202010655547A CN113917583B CN 113917583 B CN113917583 B CN 113917583B CN 202010655547 A CN202010655547 A CN 202010655547A CN 113917583 B CN113917583 B CN 113917583B
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- transfer printing
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
Abstract
The invention discloses a transfer printing type manufacturing method of a brightness enhancement film and the brightness enhancement film, wherein the transfer printing type manufacturing method of the brightness enhancement film comprises the following steps: manufacturing a brightness enhancement film transfer roller; rolling a light-transmitting film by using a brightness enhancement film transfer roller to form a brightness enhancement film. The manufacturing process of the brightness enhancement film transfer roller comprises the following steps: coating a negative photoresist layer on the outer surface of a transparent round tube; a light source is matched with a photomask to extend into the transparent round tube together, and passes through the transparent round tube in a preset light shape and irradiates the negative photoresist layer; rotating the light source and the photomask relative to the transparent circular tube so that one part of the negative photoresist layer on the outer surface of the transparent circular tube can be irradiated by light rays with a preset light shape to form a prism microstructure transfer layer; and removing the other part of the negative photoresist layer which is not provided with the prism microstructure transfer printing layer to form the brightness enhancement film transfer printing roller. The brightness enhancement film provided by the invention can greatly reduce the manufacturing time and the manufacturing cost of the brightness enhancement film by the transfer printing type manufacturing method of the brightness enhancement film.
Description
Technical Field
The present invention relates to a method for producing a brightness enhancement film and a brightness enhancement film, and more particularly, to a transfer-printing type method for producing a brightness enhancement film and a brightness enhancement film produced by the transfer-printing type method for producing a brightness enhancement film.
Background
The conventional brightness enhancement film manufacturing method often needs to be manufactured by special treatment (such as cutting by a diamond carving knife), and the special treatment often needs to consume a great deal of expense and time, so that the manufacturing time and the manufacturing cost of the brightness enhancement film are greatly improved.
Therefore, how to overcome the above-mentioned drawbacks by design and improvement of the brightness enhancement film manufacturing method has become one of the important issues to be solved by this industry.
Disclosure of Invention
The embodiment of the invention provides a transfer printing type manufacturing method of a brightness enhancement film and the brightness enhancement film, which can effectively improve the defects possibly generated by the prior manufacturing method of the brightness enhancement film.
One embodiment of the present invention discloses a transfer printing type manufacturing method of a brightness enhancement film, comprising: a roller manufacturing step: a brightness enhancement film transfer roller is manufactured, the manufacturing process comprising: a coating step: coating a negative photoresist layer surrounding 360 degrees on the outer surface of a transparent round tube; a light shaping step: a light source is matched with a photomask to extend into the light-transmitting circular tube together, so that light rays emitted by the light source can pass through the photomask, pass through the light-transmitting circular tube in a preset light shape and irradiate the negative photoresist layer; an exposure step: rotating the light source and the photomask relative to the transparent round tube so that a part of the negative photoresist layer adjacent to the outer surface of the transparent round tube can be irradiated by the light with the preset light shape to form a prism microstructure transfer layer; and a developing step: removing another part of the negative photoresist layer which is not provided with the prism microstructure transfer layer, so that the light-transmitting circular tube and the prism microstructure transfer layer formed on the light-transmitting circular tube jointly form the brightness enhancement film transfer roller; a brightness enhancement film transfer printing step: the brightness enhancement film transfer roller is continuously rolled on a light-transmitting film, so that a plurality of prism microstructures are formed on the light-transmitting film, and a brightness enhancement film is formed.
Preferably, in the manufacturing process of the brightness enhancement film transfer roller, the prism microstructure transfer layer is formed with a plurality of elongated structures which are parallel to each other and are sequentially connected; the prism microstructures are formed by rolling the light-transmitting films in an uninterrupted manner through a plurality of strip-shaped structures, and are connected in sequence and uninterrupted.
Preferably, any two adjacent ones of the elongated structures have different heights, such that any two adjacent ones of the prismatic microstructures have different heights.
Preferably, any two adjacent elongated structures have different shapes in cross section perpendicular to the long axis direction thereof.
Preferably, any two adjacent elongated structures have different triangular cross sections perpendicular to the long axis direction thereof.
Preferably, the number of the plurality of prismatic microstructures of the brightness enhancement film is greater than the number of the plurality of the elongated structures of the prismatic microstructure transfer layer.
Preferably, the gray scale values of the mask portions corresponding to any one of the elongated structures are distributed in a stepwise manner.
Preferably, the light-transmitting circular tube defines a central axis, and each of the elongated structures is parallel to the central axis.
Preferably, the light source comprises at least one light emitting diode chip capable of emitting light between 340 nanometers (nm) and 410 nm.
One embodiment of the invention discloses a brightness enhancement film which is manufactured by the transfer printing type manufacturing method of the brightness enhancement film.
In summary, one of the advantages of the present invention is that the transfer printing method for manufacturing a brightness enhancement film and the brightness enhancement film provided by the present invention can enable the transparent round tube and the prism microstructure transfer printing layer formed on the transparent round tube to jointly form the brightness enhancement film transfer printing roller through the exposure step and the development step, and enable the brightness enhancement film transfer printing roller to be continuously rolled on the transparent film through the brightness enhancement film transfer printing step, so that the transparent film is formed with a plurality of prism microstructures, thereby forming the brightness enhancement film, and the manufacturing time and the manufacturing cost of the brightness enhancement film are greatly reduced.
For a further understanding of the nature and the technical aspects of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the invention.
Drawings
Fig. 1 is a schematic flow chart of a transfer printing method for manufacturing a brightness enhancement film according to an embodiment of the present invention.
Fig. 2 is a schematic perspective view of a light-transmitting round tube coated with a negative photoresist layer according to an embodiment of the invention.
FIG. 3 is a schematic diagram illustrating the operation of the light source and the mask extending into the transparent round tube together according to the embodiment of the present invention.
Fig. 4 is a schematic perspective view of the transparent round tube irradiated by the predetermined light shape according to the embodiment of the invention.
Fig. 5A to 5B are schematic cross-sectional views of fig. 4 taken along the VA-VA line.
Fig. 6A to 6D are schematic cross-sectional views of an elongated structure according to an embodiment of the invention.
Fig. 7A to 7C are perspective views illustrating 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 section VIID.
Fig. 8A to 8B are schematic views illustrating an operation of embossing a light-transmitting film by a brightness enhancement film transfer roller according to an embodiment of the present invention.
Detailed Description
The following specific examples are given to illustrate the embodiments of the present invention disclosed herein with respect to the method for producing a brightness enhancing film and the brightness enhancing film, and those skilled in the art will appreciate the advantages and effects of the present invention from the disclosure herein. The invention is capable of other and different embodiments and its several details are capable of modification and variation in various respects, all from the point of view and application, all without departing from the spirit of the present invention. The drawings of the present invention are merely schematic illustrations, and are not intended to be drawn to actual dimensions. The following embodiments will further illustrate the related art content of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
It will be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or signal from another signal. In addition, the term "or" as used herein shall include any one or combination of more of the associated listed items as the case may be.
Referring to fig. 1 to 8B, which are examples of the present invention, it should be noted that the drawings corresponding to the present invention and the related numbers and shapes thereof are only used to specifically illustrate the embodiments of the present invention, so as to facilitate understanding of the present invention, and are not intended to limit the scope of the present invention.
The embodiment of the invention discloses a brightness enhancement film 500 and a transfer printing type manufacturing method of the brightness enhancement film. In order to facilitate understanding of the structure of the brightness enhancement film 500, a transfer-type manufacturing method of the brightness enhancement film will be described below, and then the structure of the brightness enhancement film 500 will be described, but the brightness enhancement film 500 of the present embodiment is not limited to being manufactured according to the manufacturing method. As shown in fig. 1, the transfer printing method of the brightness enhancement film in the present embodiment includes a roller manufacturing step S1 and a brightness enhancement film transfer printing step S2.
The manufacturing process of the roller manufacturing step S1 sequentially comprises the following steps: a coating step S11, a light shaping step S12, an exposing step S13, and a developing step S14, but the present invention is not limited thereto. For example, in other embodiments of the present invention, not shown, the roller manufacturing step S1 may further include a baking step connected to the developing step S14.
As shown in fig. 1 and 2, the coating step S11: a light-transmitting round tube 1 is provided, and a negative photoresist layer 2 surrounding 360 degrees is coated on the outer surface 12 of the light-transmitting round tube 1. It should be noted that, in the present embodiment, the light-transmitting circular tube 1 defines a central axis 11, and the light-transmitting circular tube 1 is made of a material having transparent properties, such as soda lime glass, quartz glass or acrylic glass; the negative photoresist layer 2 is mainly made of a material such as polyisoprene rubber (Polyisoprene rubber) or Epoxy-based polymer, but the present invention is not limited thereto. For example, the transparent tube 1 may be made of other transparent materials such as Pyrex glass; the negative photoresist layer 2 may be made of a negative photoresist material such as Thiol-ene (OSTE) polymer.
As shown in fig. 1 and 3, the light shaping step S12: providing a light source 200 and a light cover 300 surrounding the light source 200 at intervals, and then co-extending the light source 200 into the transparent round tube 1 together with the light cover 300, so that the light emitted by the light source 200 can pass through the light cover 300, pass through the transparent round tube 1 in a predetermined light shape and irradiate the negative photoresist layer 2. In this embodiment, the light source 200 may be configured to emit ultraviolet light, and preferably includes at least one light emitting diode chip capable of emitting light between 340 nanometers (nm) and 410 nm, and the at least one light emitting diode chip includes a laser diode chip, but the at least one light emitting diode chip may be adjusted and changed according to design requirements, which is not limited by the present invention.
As shown in fig. 3, the mask 300 is a gray scale mask in this embodiment, and gray scale values of the mask 300 are distributed in a stepwise manner. Further, the gray levels of the mask 300 have distinct boundaries therebetween. The mask 300 may control the predetermined light shape by adjusting the gray level distribution thereof, but the present invention is not limited thereto. For example, the gray scale values of the mask 300 may also be continuously and gradually distributed. That is, there is no distinct boundary between the gray levels of the mask 300.
As shown in fig. 1, 3 and 4, the exposure step S13: the light source 200 and the photomask 300 are rotated relative to the transparent circular tube 1 so that a portion of the negative photoresist layer 2 adjacent to the outer surface 12 of the transparent circular tube 1 can be irradiated with the light having the predetermined light shape to form a prism microstructure transfer layer 3. 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 shade 300 move from one end to the other end of the transparent circular tube 1.
As shown in fig. 5A and 7A, in a cross section of the prism microstructure transfer layer 3 perpendicular to the central axis 11, the prism microstructure transfer layer 3 is closed, and the prism microstructure transfer layer 3 has a plurality of elongated structures 31 that are parallel to each other and are sequentially connected. Each of the elongated structures 31 extends from one end to the other end of the light-transmitting circular tube 1, and any two adjacent elongated structures 31 have the same height, but the present invention is not limited thereto. For example, as shown in fig. 5B and 7B, any two adjacent elongated structures 31 may have different heights; as shown in fig. 7C and 7D, each of the elongated structures 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 thereto. For example, in other embodiments not shown in the present disclosure, any two adjacent elongated structures 31 may have different heights.
As shown in fig. 5A and 5B, the widths of the cross sections of any two adjacent elongated structures 31 perpendicular to the longitudinal direction thereof are different from each other, but the present invention is not limited thereto. For example, in other embodiments not shown in the present disclosure, the widths of the cross sections of any two adjacent elongated structures 31 perpendicular to the long axis direction thereof may be the same.
As shown in fig. 7A to 7D, each of the elongated structures 31 is parallel to the central axis 11, and the cross section of any two adjacent elongated structures 31 perpendicular to the long axis direction thereof has a different shape. In more detail, in the present embodiment, any two adjacent elongated structures 31 have different triangular cross sections perpendicular to the long axis direction thereof, but the present invention is not limited thereto. For example, in other embodiments not shown in the present disclosure, the cross-section of any two adjacent elongated structures 31 perpendicular to the long axis direction thereof may also have a semicircular shape and a triangular shape.
The shape of any one of the elongated structures 31 is different according to the gray scale value of the portion of the mask 300. Wherein the portion of the mask 300 may be defined as a color block 301. Further, the user can control the predetermined light shape by adjusting the gray level distribution of each color patch 301, thereby adjusting the shape of the corresponding elongated structure 31. As shown in fig. 5A and 5B, when the gray-scale value distribution of each color patch 301 is different, the prism microstructure transferring layer 3 is correspondingly formed with a plurality of elongated structures 31 with different shapes.
For example, as shown in fig. 6A, when the gray scale value of each color block 301 is distributed in a gradient manner of substantially deep-shallow-deep, the portion of the negative photoresist layer 2 irradiated by the predetermined light form forms an isosceles triangle structure. As shown in fig. 6B, when the gray scale value of a portion of each color block 301 changes sharply, the portion of the negative photoresist layer 2 irradiated by the predetermined light pattern forms an asymmetric triangle structure.
As shown in fig. 6C and 6D, when the gray scale value of each color patch 301 is substantially continuously and gradually distributed from deep to shallow to deep, the portion of the negative photoresist layer 2 irradiated with the predetermined light pattern forms a semicircular structure. When the gray scale value of each color block 301 is continuously and gradually distributed from shallow to deep, the part of the negative photoresist layer 2 irradiated by the predetermined light shape forms a right triangle structure.
As shown in fig. 1, 7A and 7B, the developing step S14: and removing the other part of the negative photoresist layer 2 where the prism microstructure transfer layer 3 is not formed, so that the transparent round tube 1 and the prism microstructure transfer layer 3 formed on the transparent round tube 1 together form a brightness enhancement film transfer roller 100. In the present embodiment, another portion of the negative photoresist layer 2 where the prism microstructure transferring layer 3 is not formed (that is, a portion of the negative photoresist layer 2 not irradiated with the light having the predetermined light shape) may be dissolved using a developer corresponding to the negative photoresist layer 2.
As shown in fig. 1 and 8A, the brightness enhancement film transfer step S2: the brightness enhancement film transfer roller 100 is continuously rolled on a transparent film 400, so that the transparent film 400 is formed with a plurality of prism microstructures 501 to form a brightness enhancement film 500. The following describes the structure of the brightness enhancement film 500 in this embodiment, but the invention is not limited thereto.
As shown in fig. 8A, the prism microstructures 501 of the brightness enhancement film 500 are formed by rolling the plurality of elongated structures 31 of the brightness enhancement film transfer roller 100 onto the light-transmitting film 400 without interruption, and the prism microstructures 501 are connected in sequence without interruption. Wherein the number of the plurality of prismatic microstructures 501 of the brightness enhancement film 500 is greater than the number of the plurality of the elongated structures 31 of the prismatic microstructure transfer layer 3. It should be noted that, in the present embodiment, any two adjacent elongated structures 31 have the same height, so that any two adjacent prismatic microstructures 501 have the same height, but the present invention is not limited thereto. For example, as shown in fig. 8B, any two adjacent elongated structures 31 have different heights, so that any two adjacent prismatic microstructures 501 have different heights.
In addition, as shown in fig. 7B and 8B, the embodiment of the present invention further discloses a brightness enhancement film transfer roller 100, which sequentially includes the transparent circular tube 1 and the prism microstructure transfer layer 3 formed on the outer surface 12 of the transparent circular tube 1 from inside to outside. The light-transmitting circular tube 1 defines the central axis 11. The prism microstructure transferring layer 3 is formed by exposing the negative photoresist layer 2, and the prism microstructure transferring layer 3 is used for rolling transfer printing on the light-transmitting film 400 to form a plurality of prism microstructures 501, thereby forming the brightness enhancement film 500. The prismatic microstructure transferring layer 3 includes a plurality of elongated structures 31 each parallel to the central axis 11 and arranged in a circular ring shape, and any two adjacent elongated structures 31 perpendicular to the central axis 11 have different shapes in cross section, but the present invention is not limited thereto. For example, as shown in fig. 7C and 7D, the prismatic microstructure transfer layer 3 may also include a plurality of 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 prism microstructure transfer layer 3 of the brightness enhancement film transfer roller 100, which is formed by exposing the negative photoresist layer 2, and is used for rolling transfer printing on the light-transmitting film 400 to form a plurality of prism microstructures 501, so as to form the brightness enhancement film 500; the prism microstructure transferring layer 3 includes a plurality of elongated structures 31 arranged in parallel and in a circular ring shape, and any two adjacent elongated structures 31 have different shapes in cross section perpendicular to the long axis direction thereof, but the invention is not limited thereto. For example, as shown in fig. 7C and 7D, the prismatic microstructure transfer layer 3 may also include a plurality of elongated structures 31 each perpendicular to the central axis 11.
Advantageous effects of the embodiment
The brightness enhancement film transfer roller and the prism microstructure transfer layer thereof provided by the invention have the beneficial effects that the prism microstructure transfer layer can be formed on the outer surface of the light-transmitting round tube through exposing the negative photoresist layer, and the technical scheme that the sections of any two adjacent strip-shaped structures of the prism microstructure transfer layer have different shapes can be adopted, so that the manufacturing cost and the manufacturing time for manufacturing the brightness enhancement film transfer roller with the complex surface microstructure are effectively saved.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims and their equivalents.
Claims (10)
1. A transfer printing type manufacturing method of a brightness enhancement film, characterized in that the transfer printing type manufacturing method of the brightness enhancement film comprises the following steps:
a roller manufacturing step: a brightness enhancement film transfer roller is manufactured, the manufacturing process comprising:
a coating step: coating a negative photoresist layer surrounding 360 degrees on the outer surface of a transparent round tube;
a light shaping step: a light source is matched with a photomask to extend into the light-transmitting circular tube together, so that light rays emitted by the light source can pass through the photomask, pass through the light-transmitting circular tube in a preset light shape and irradiate the negative photoresist layer;
an exposure step: rotating the light source and the photomask relative to the transparent round tube so that a part of the negative photoresist layer adjacent to the outer surface of the transparent round tube can be irradiated by the light with the preset light shape to form a prism microstructure transfer layer; a kind of electronic device with high-pressure air-conditioning system
A developing step: removing another part of the negative photoresist layer which is not provided with the prism microstructure transfer layer, so that the light-transmitting circular tube and the prism microstructure transfer layer formed on the light-transmitting circular tube jointly form the brightness enhancement film transfer roller; and
a brightness enhancement film transfer printing step: the brightness enhancement film transfer roller is continuously rolled on a light-transmitting film, so that a plurality of prism microstructures are formed on the light-transmitting film, and a brightness enhancement film is formed.
2. The transfer printing type manufacturing method of a brightness enhancement film according to claim 1, wherein in the manufacturing process of the brightness enhancement film transfer printing roller, the prism microstructure transfer printing layer is formed with a plurality of elongated structures which are parallel to each other and are connected in sequence; the prism microstructures are formed by rolling the light-transmitting films in an uninterrupted manner through a plurality of strip-shaped structures, and are connected in sequence and uninterrupted.
3. The transfer printing method of manufacturing a brightness enhancement film according to claim 2, wherein any two adjacent elongated structures have different heights such that any two adjacent prismatic microstructures have different heights.
4. The transfer printing method according to claim 2, wherein cross sections of any two adjacent elongated structures perpendicular to the long axis direction thereof have different shapes.
5. The transfer printing method according to claim 2, wherein cross sections of any two adjacent elongated structures perpendicular to the long axis direction thereof have different triangles.
6. The transfer printing method of manufacturing a brightness enhancement film according to claim 2, wherein the number of the prism microstructures of the brightness enhancement film is greater than the number of the elongated structures of the prism microstructure transfer printing layer.
7. The method according to claim 2, wherein the gray-scale values of the mask portions corresponding to any one of the elongated structures are distributed in a stepwise manner.
8. The method of claim 2, wherein the light transmissive tube defines a central axis and each of the elongated structures is parallel to the central axis.
9. The method of claim 1, wherein the light source comprises at least one light emitting diode chip capable of emitting light in the range of 340 nm to 410 nm.
10. A brightness enhancing film produced by the transfer printing method of the brightness enhancing film according to claim 1.
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| CN202010655547.0A CN113917583B (en) | 2020-07-09 | 2020-07-09 | Transfer printing type manufacturing method of brightness enhancement film and brightness enhancement film |
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| CN202010655547.0A CN113917583B (en) | 2020-07-09 | 2020-07-09 | Transfer printing type manufacturing method of brightness enhancement film and brightness enhancement film |
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| CN113917583B true CN113917583B (en) | 2023-07-25 |
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| CN113917583A (en) | 2022-01-11 |
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