阅读说明：本技术 一种复合增光膜背涂面结构及制作方法 (Composite bright enhancement film back coating surface structure and manufacturing method ) 是由 周鹏 沈渊 刁全利 王磊 孙亮 于 2020-06-11 设计创作，主要内容包括：本发明公开了一种复合增光膜背涂面结构及制作方法,该复合增光膜背涂面结构包括基材,基材具有一对相反的表面,分别为进光面和背涂面,背涂面为粗糙的棱镜表面,粗糙的棱镜表面是由改进成型辊加工而成；改进成型辊包括基辊和电镀在其外侧的镍磷层,基辊在电镀前对其表面进行车平处理,电镀后在镍磷层上用金刚石刀具对其进行螺纹切削雕刻处理,金刚石刀具的下刀深度为2-5um,下刀频率为15000-20000HZ,镍磷层经过螺纹切削雕刻处理后表面形成有微凹结构。本发明结构设计科学合理,其通过对成型辊加工改进来得到粗糙的棱镜表面,提升遮蔽性的同时,能够减小光的漫反射传播,进而保障了增亮效果,可以提升增光增益值2-3％。(The invention discloses a composite brightness enhancement film back coating surface structure and a manufacturing method thereof, wherein the composite brightness enhancement film back coating surface structure comprises a base material, the base material is provided with a pair of opposite surfaces which are a light inlet surface and a back coating surface respectively, the back coating surface is a rough prism surface, and the rough prism surface is formed by processing an improved forming roller; the improved forming roller comprises a base roller and a nickel-phosphorus layer electroplated on the outer side of the base roller, the surface of the base roller is subjected to flattening treatment before electroplating, the nickel-phosphorus layer is subjected to thread cutting and engraving treatment by using a diamond cutter after electroplating, the depth of a lower cutter of the diamond cutter is 2-5 mu m, the frequency of the lower cutter is 15000-20000HZ, and a micro-concave structure is formed on the surface of the nickel-phosphorus layer after the thread cutting and engraving treatment. The invention has scientific and reasonable structural design, and the rough prism surface is obtained by processing and improving the forming roller, so that the shielding property is improved, the diffuse reflection propagation of light can be reduced, the brightening effect is further ensured, and the brightening gain value can be improved by 2-3%.)

1. The utility model provides a compound membrane of adding lustre to back scribbles face structure, includes the substrate, the substrate has a pair of opposite surface, is into smooth surface and back respectively and scribbles the face, its characterized in that: the back coating surface is a rough prism surface, and the rough prism surface is processed by an improved forming roller; improve the forming roller and include the base roll and electroplate the nickel phosphorus layer in its outside, the base roll carries out the flat processing of car to its surface before electroplating, is in after electroplating it carries out the thread cutting sculpture processing to it with diamond cutter on the nickel phosphorus layer, diamond cutter's lower sword degree of depth is 2-5um, and the lower sword frequency is 15000-.

2. The back coating structure of the composite brightness enhancement film according to claim 1, wherein: the rough prism surface is provided with a plurality of convex points, and the surfaces of the convex points are reflective.

3. The back coating structure of the composite brightness enhancement film according to claim 1, wherein: the haze corresponding to the micro-concave structure is 10-30%.

4. The back coating structure of the composite brightness enhancement film according to claim 1, wherein: the thickness of the nickel-phosphorus layer is 200-300mm, and the hardness is 550-580 HB.

5. The back coating structure of the composite brightness enhancement film according to claim 4, wherein: the thickness of the nickel-phosphorus layer is 230-270mm, and the hardness is 572-575 HB.

6. The back coating structure of the composite brightness enhancement film according to claim 1, wherein: the diamond cutter is a cutter with an R angle of 100-200 mu m and an arc degree.

7. The manufacturing method of the back coating surface structure of the composite bright enhancement film is characterized by comprising the following steps:

1) the base roller is arranged on the ultra-precision processing machine, the run-out value of the base roller is calibrated, and the surface of the base roller is subjected to flat turning treatment by a diamond cutter;

2) cleaning the base roller with a metal cleaning agent, then washing with clear water, and finally activating the surface of the roller core with dilute sulfuric acid;

3) electroplating a nickel-phosphorus layer on the surface of the base roller, wherein the thickness of the nickel-phosphorus layer is between 200 and 300 mu m, and the hardness is between 550 and 580 HB;

4) replacing a diamond cutter with an R angle of 100-;

5) the roller body subjected to thread cutting and carving is an improved forming roller, a micro-concave structure with the corresponding haze of 10-30% is formed on the surface of the improved forming roller, and the rough prism surface can be formed by utilizing the back coating surface formed by the improved forming roller.

8. The method for manufacturing the back coating surface structure of the composite brightness enhancement film according to claim 7, is characterized in that: in the step 3), after the base roller finishes electroplating the nickel-phosphorus layer, the base roller is placed, cooled and kept at the constant temperature for 22-26 h.

Technical Field

The invention relates to the technical field of liquid crystal display, in particular to a composite bright enhancement film back coating surface structure and a manufacturing method thereof.

Background

With the popularization of TFT-LCD liquid crystal display technology, the demand of backlight modules and related optical films thereof is increasing. With the impact of new OLED technology, the industry has reduced the selling price of LCD liquid crystal displays, and the corresponding raw materials also need to be lower in price and lower in cost. The brightness enhancement film for the backlight module of the LCD must reduce the cost, and the brightness enhancement film mainly plays the roles of brightness enhancement and shielding in the backlight module. The back coating surface structure has a atomization effect and certain fog, and mainly aims to improve the shielding property of the brightness enhancement film, but the atomization effect of the back coating surface structure can be used for scattering light, so that the brightness enhancement effect of the brightness enhancement film is poor.

In order to solve the above problems, the back coating surface in the prior art is designed to have irregular small pits as shown in fig. 1, so as to achieve the atomization effect and improve the shielding property of the brightness enhancement film. However, the back coating surface structure is a common sand blasting structure made by a common sand blasting device, and the formed back coating surface structure is a pit.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provide a composite brightness enhancement film back coating surface structure, which can improve the shielding property and reduce the diffuse reflection propagation of light so as to ensure the brightness enhancement effect.

In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:

the back coating surface structure of the composite brightness enhancement film comprises a base material, wherein the base material is provided with a pair of opposite surfaces, namely a light inlet surface and a back coating surface, the back coating surface is a rough prism surface, and the rough prism surface is processed by an improved forming roller; improve the forming roller and include the base roll and electroplate the nickel phosphorus layer in its outside, the base roll carries out the flat processing of car to its surface before electroplating, is in after electroplating it carries out the thread cutting sculpture processing to it with diamond cutter on the nickel phosphorus layer, diamond cutter's lower sword degree of depth is 2-5um, and the lower sword frequency is 15000-.

Furthermore, in the above composite brightness enhancement film back coating surface structure, the rough prism surface has a plurality of convex points, and the surfaces of the convex points have reflectivity.

Further, in the back coating surface structure of the composite brightness enhancement film, the haze corresponding to the micro-concave structure is 10-30%.

Furthermore, in the back coating surface structure of the composite brightness enhancement film, the thickness of the nickel-phosphorus layer is 200-300mm, and the hardness is 550-580 HB.

Furthermore, in the back coating surface structure of the composite brightness enhancement film, the thickness of the nickel-phosphorus layer is 230-270mm, and the hardness is 572-575 HB.

Further, in the above composite brightness enhancement film back coating surface structure, the diamond tool is a tool with an R angle of 100-.

A manufacturing method of a back coating surface structure of a composite bright enhancement film comprises the following steps:

1) the base roller is arranged on the ultra-precision processing machine, the run-out value of the base roller is calibrated, and the surface of the base roller is subjected to flat turning treatment by a diamond cutter;

2) cleaning the base roller with a metal cleaning agent, then washing with clear water, and finally activating the surface of the roller core with dilute sulfuric acid;

3) electroplating a nickel-phosphorus layer on the surface of the base roller, wherein the thickness of the nickel-phosphorus layer is between 200 and 300 mu m, and the hardness is between 550 and 580 HB;

4) replacing a diamond cutter with an R angle of 100-;

5) the roller body subjected to thread cutting and carving is an improved forming roller, a micro-concave structure with the corresponding haze of 10-30% is formed on the surface of the improved forming roller, and the rough prism surface can be formed by utilizing the back coating surface formed by the improved forming roller.

Further, in the manufacturing method of the back coating surface structure of the composite brightness enhancement film, in the step 3), after the nickel-phosphorus layer is electroplated on the base roller, the base roller is placed and cooled for 22-26 hours.

The invention has the beneficial effects that:

the back coating surface structure of the composite brightness enhancement film provided by the invention is scientific and reasonable in design, the rough prism surface is obtained by processing and improving the forming roller, the shielding property is improved, and meanwhile, the diffuse reflection propagation of light can be reduced, so that the brightness enhancement effect is ensured; compared with the prior art structure, the gain value of the light increasing can be improved by 2-3%.

Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of an electron microscope scanning of a prior art back-coating surface structure in the background art;

FIG. 2 is a schematic view showing the structure of a base roll in the present invention;

FIG. 3 is a schematic view of the construction of the improved form roll of the present invention;

FIG. 4 is a schematic view of a scanning electron microscope illustrating a back coating surface structure of the composite brightness enhancement film according to the present invention;

FIG. 5 is a schematic view of an AFM of the back coating surface structure of the composite brightness enhancement film of the present invention;

FIG. 6 is a schematic view of height data of the bumps under a scanning electron microscope according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-base roller, 2-nickel-phosphorus layer, 3-micro concave structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.