Compensation film and preparation process thereof

Abstract

The invention discloses a compensation film and a preparation process thereof, and particularly relates to the technical field of compensation films, the compensation film comprises a polarizing film, a first prism optical film is fixedly adhered to the bottom end of the polarizing film, a second prism optical film is fixedly adhered to the bottom end of the first prism optical film, the first prism optical film comprises a first polyester film, and the second prism optical film comprises a second polyester film. The first prism optical film comprises a first polyester film, a first ultraviolet resin film is fixedly bonded to the top end of the first polyester film, the second prism optical film comprises a second polyester film, and a second ultraviolet resin film is fixedly bonded to the top end of the second polyester film. The polarizing film, the first prism optical film and the second prism optical film are matched to form the compensation film, the first prism optical film and the second prism optical film are used for collecting light towards the center direction, so that the consumption of light energy can be reduced, the brightness of the display screen can be improved, and the brightness of the display screen can be improved through matching of the protrusions and the grooves. The delamination phenomenon between a polarizing film and a first prism optical film and between the first prism optical film and a second prism optical film can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of compensation films, and more specifically to a compensation film and a preparation process thereof. Background Art

[0002] Compensation film is a material that eliminates the blue-violet light and yellow-green light that appear on the LCD screen by compensating for the difference in light transmission speed, making the black and white display more vivid. At the same time, the compensation film can also improve the contrast and viewing angle characteristics, make up for the shortcomings in the display, such as improving the distribution of dark state light leakage and improving the contrast of the display; it can also optimize the color and viewing angle, and optimize the optical performance of the display mode, such as transmittance, color shift and viewing angle.

[0003] Existing compensation films are usually composed of brightness enhancement films and prism films. According to the principle of geometric optics, the light emitted from the backlight source passes through the prism film and the backlight system, and finally converges in the straight-view direction to emit, thereby achieving a brightening effect. When the film is used in the backlight source of a display screen, when the light from the light source passes through the prism structure, only the light within a certain angle range can be emitted through refraction. The rest of the light is reflected back to the light source by the edge of the prism because it does not meet the refraction condition, and then re-emitted by the reflective sheet at the bottom of the light source. In this way, the light in the backlight source is continuously recycled under the action of the prism structure. The light that originally diverged in all directions is controlled to an angle range of 70 degrees after passing through the prism film, thereby achieving the effect of axial brightness enhancement.

[0004] For example, the prior art publication number CN105717573B is a compensation film polarizer and a liquid crystal display. The invention sets the positional relationship between the third triacetate cellulose film and the liquid crystal polymer film, and cleverly sets the compensation value range of the third triacetate cellulose film, the compensation value range of the liquid crystal polymer film, and the compensation value of the matching liquid crystal layer. Under the synergistic effect of the above, the technical problems of the existing liquid crystal display background color blue and light leakage can be effectively solved, and the background colors of the liquid crystal display can be consistent in direction and without light leakage.

[0005] However, the above-mentioned prior art still has the following problems when in use: since the components inside the display screen will generate heat, when the heat is transferred to the compensation film, the compensation film will exhibit anisotropic expansion under high temperature conditions, resulting in deformation, forming a Mura color unevenness phenomenon, and the brightness enhancement film and prism film combined to form the compensation film will also delaminate. Based on this, the present invention provides a compensation film and a preparation process thereof. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a compensation film and a preparation process thereof. The compensation film is constituted by a polarizing film, a prism optical film 1 and a prism optical film 2, which can greatly improve the brightness of the display screen. Heat dissipation hole 1, heat dissipation hole 2 and heat dissipation hole 3 are arranged to realize the circulation of air in the prism optical film 1 and the prism optical film 2, thereby reducing the phenomenon that the polyester film 1 and the polyester film 2 expand due to high temperature, so as to solve the problems arising from the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a compensation film, comprising a polarizing film, wherein a prismatic optical film 1 is fixedly bonded to the bottom end of the polarizing film, a prismatic optical film 2 is fixedly bonded to the bottom end of the prismatic optical film 1, the prismatic optical film 1 comprises a polyester film 1, an ultraviolet resin film 1 is fixedly bonded to the top end of the polyester film 1, the prismatic optical film 2 comprises a polyester film 2, an ultraviolet resin film 2 is fixedly bonded to the top end of the polyester film 2, the cross-sections of the ultraviolet resin film 1 and the ultraviolet resin film 2 are arranged in a wavy shape, the tops of the ultraviolet resin film 1 and the ultraviolet resin film 2 are both formed with a plurality of reflecting surfaces and a plurality of refractive surfaces, the bottom ends of the polarizing film and the bottom ends of the polyester film 1 are both processed with wavy printing grooves adapted to the ultraviolet resin film 2, the tops of the ultraviolet resin film 1 and the ultraviolet resin film 2 are respectively arranged inside the two wavy printing grooves, the front end of the polyester film 1 is provided with a plurality of heat dissipation holes 1, and the bottom end of the polyester film 2 is provided with a plurality of heat dissipation holes 2.

[0008] In a preferred embodiment, protective films are fixedly bonded around the outer walls of the polarizing film, polyester film one and polyester film two, a thermal conductive film is fixedly bonded to the inner wall of the protective film, and a light-shielding paint is applied to the inner wall of the thermal conductive film. The light-shielding paint can improve the light-shielding property of the protective film, thereby reducing the penetration of light.

[0009] In a preferred embodiment, the outer walls on both the front and rear sides of the protective film are provided with a plurality of heat dissipation holes three, and the plurality of heat dissipation holes three are respectively connected with the plurality of heat dissipation holes one and the plurality of heat dissipation holes two. The heat dissipation holes three cooperate with the heat dissipation holes one and two to realize the circulation of air inside the polyester film one and the polyester film two, thereby realizing the heat dissipation of the polyester film one and the polyester film two.

[0010] In a preferred embodiment, the outer wall surface of the protective film, the inner wall surface of each heat dissipation hole 1, the inner wall surface of each heat dissipation hole 2 and the inner wall surface of each heat dissipation hole 3 are all coated with antibacterial coating. The antibacterial effect of the protective film, polyester film 1 and polyester film 2 can be improved by using the antibacterial coating.

[0011] In a preferred embodiment, a plurality of protrusions are fixedly provided on the top of the UV resin film 1 and the UV resin film 2, a plurality of grooves matching the protrusions are provided at the bottom ends of the two wavy printing grooves, and the plurality of protrusions are respectively arranged in the plurality of grooves. By cooperating with the protrusions and the grooves, the firmness of the fit between the prism optical film 1 and the polarizing film, and between the prism optical film 2 and the prism optical film 1 can be improved.

[0012] In a preferred embodiment, a connecting film is connected to the bottom end of the protective film, and the outer wall of the connecting film is provided with a hot melt adhesive layer bonded to the display screen backlight source. When the compensation film is pasted, the connecting film is bonded to the side of the display screen backlight source, which can not only improve the bonding firmness between the compensation film and the display screen backlight source, but also further reduce the emission of light.

[0013] The present invention also includes a process for preparing the polarizing film, and the specific steps are as follows:

[0014] Step 1: Use a resin granulator to fully fuse the resin and PEN material together. The fused material is extruded into strips by the resin granulator. The strips are cooled in a cooling tank and then transported to a pelletizing device. The pelletizing device is used to cut the strips into masterbatches.

[0015] Step 2: transporting the masterbatch to an extrusion device, and using the extrusion device to extrude to form a base film;

[0016] Step 3: Using a stretching device to stretch the base film in step 2 to form a polyester film 1 and a polyester film 2;

[0017] Step 4: Use a hot pressing device to bond the UV resin film 2 on top of the polyester film 1 and the polyester film 2;

[0018] Step 5: Use a hard mold to press out wavy patterns on the surfaces of the UV resin film 1 and the UV resin film 2, and use a UV lamp to irradiate the UV resin film 1 and the UV resin film 2, and use a laminating device to laminate the UV resin film 1 and the polarizing film, and the UV resin film 2 and the polyester film 1 together;

[0019] Step 6: Use a glue injection device to apply a layer of adhesive on the surface of the polarizing film, and then use a laminating device to bond the polarizing film and the prismatic optical film 1 together, and then bond the prismatic optical film 1 and the prismatic optical film 2 together, and use a drying chamber to dry the bonded polarizing film, the prismatic optical film 1 and the prismatic optical film 2 to obtain the product;

[0020] Step 7: Glue the protective film to the outer wall of the product in step 6, and glue the connecting film to the outer wall of the protective film to obtain the final product.

[0021] Technical effects and advantages of the present invention:

[0022] 1. The present invention forms a compensation film by combining a polarizing film, a prism optical film 1 and a prism optical film 2, and uses the prism optical film 1 and the prism optical film 2 to gather light toward the center, thereby reducing the consumption of light energy, thereby improving the brightness of the display screen, and combining the protrusions and the grooves to reduce the delamination phenomenon between the polarizing film and the prism optical film 1, and between the prism optical film 1 and the prism optical film 2;

[0023] 2. The protective film can not only protect the side of the compensation film, but also reduce light penetration with the help of the shading paint on the protective film, thereby further reducing the consumption of light energy. The thermal conductive film can be used for heat dissipation of polarizing film, prism optical film 1 and prism optical film 2;

[0024] 3. By setting heat dissipation hole 1, heat dissipation hole 2 and heat dissipation hole 3, air circulation can be achieved in prism optical film 1 and prism optical film 2, thereby facilitating heat dissipation and preventing polyester film 1 and polyester film 2 from expanding due to high temperature, thereby reducing the problem of deformation of polyester film 1 and polyester film 2 and improving the environmental tolerance of polyester film 1 and polyester film 2.

[0025] 4. The preparation process of the compensation film of the present invention is simple. A resin granulator is used to make masterbatch, and a stretching process is performed to improve the environmental tolerance of the prism optical film 1 and the prism optical film 2. The polarizing film is bonded to the prism optical film 1 and the prism optical film 2 through a bonding process, thereby improving the strength of the compensation film. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0028] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0029] Figure 4 A bottom view of the polarizing film of the present invention;

[0030] Figure 5 A top view of the prismatic optical film of the present invention;

[0031] Figure 6 A bottom view of the prismatic optical film of the present invention;

[0032] Figure 7 It is a second top view of the prismatic optical film of the present invention;

[0033] Figure 8 It is a bottom view of the prismatic optical film of the present invention;

[0034] Fig. 9Schematic diagram of the protective film of the present invention.

[0035] The accompanying drawings are marked as follows: 1, polarizing film; 2, prismatic optical film 1; 3, prismatic optical film 2; 4, reflecting surface; 5, refractive surface; 6, wavy printing groove; 7, heat dissipation hole 1; 8, heat dissipation hole 2; 9, protective film; 10, thermal conductive film; 11, shading paint; 12, heat dissipation hole 3; 13, antibacterial paint; 14, protrusion; 15, groove; 16, connecting film; 17, hot melt adhesive layer;

[0036] 201. polyester film one; 202. ultraviolet resin film one;

[0037] 301. Polyester film 2; 302. UV resin film 2. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Refer to the instruction manual Figure 1-9 The present invention provides a compensation film, comprising a polarizing film 1, wherein a prismatic optical film 2 is fixedly bonded to the bottom end of the polarizing film 1, a prismatic optical film 3 is fixedly bonded to the bottom end of the prismatic optical film 2, the prismatic optical film 2 comprises a polyester film 201, an ultraviolet resin film 202 is fixedly bonded to the top end of the polyester film 201, the prismatic optical film 3 comprises a polyester film 301, an ultraviolet resin film 302 is fixedly bonded to the top end of the polyester film 301, the cross-sections of the ultraviolet resin film 202 and the ultraviolet resin film 302 are arranged in a wavy shape, and the tops of the ultraviolet resin film 202 and the ultraviolet resin film 302 are both provided with a plurality of reflecting surfaces 4 and a plurality of refractive surfaces 5;

[0040] The bottom of the polarizing film 1 and the bottom of the polyester film 1 201 are both processed with a wavy printing groove 6 adapted to the ultraviolet resin film 2 302, the tops of the ultraviolet resin film 1 202 and the ultraviolet resin film 2 302 are respectively arranged inside the two wavy printing grooves 6, the front end of the polyester film 1 201 is provided with a plurality of heat dissipation holes 1 7, and the bottom of the polyester film 2 301 is provided with a plurality of heat dissipation holes 2 8;

[0041] The tops of the UV resin film 1 202 and the UV resin film 2 302 are both fixed with a plurality of protrusions 14, and the bottoms of the two wave-shaped printing grooves 6 are both provided with a plurality of grooves 15 adapted to the protrusions 14, and the plurality of protrusions 14 are respectively arranged in the plurality of grooves 15, and the cooperation between the protrusions 14 and the grooves 15 can improve the bonding firmness between the prism optical film 1 2 and the polarizing film 1, and between the prism optical film 2 3 and the prism optical film 1 2;

[0042] The bottom end of the protective film 9 is connected to a connecting film 16, and the outer wall of the connecting film 16 is provided with a hot melt adhesive layer 17 bonded to the display screen backlight source. When pasting the compensation film, the connecting film 16 is bonded to the side of the display screen backlight source, which can not only improve the bonding firmness between the compensation film and the display screen backlight source, but also further reduce the emission of light.

[0043] The compensation film is formed by combining the polarizing film 1, the prism optical film 1 2 and the prism optical film 2 3. The compensation film is pasted between the backlight source of the display screen and the LCD. Between the cells, the light emitted by the backlight source of the display screen is reflected and refracted inside the prism optical film 1 2 and the prism optical film 2 3, and the light is gathered toward the center, so that the consumption of light energy can be reduced, and the brightness of the display screen can be improved. In addition, the wavy ultraviolet resin film 1 202 and the ultraviolet resin film 2 302 are bonded with the wavy printing groove 6 to improve the bonding firmness between the prism optical film 1 2 and the polarizing film 1, and between the prism optical film 2 3 and the prism optical film 1 2. In addition, a plurality of protrusions 14 are arranged on the ultraviolet resin film 1 202 and the ultraviolet resin film 2 302, and the protrusions 14 are used to cooperate with the plurality of grooves 15 on the inner wall of the wavy printing groove 6 to improve the bonding firmness between the polarizing film 1 and the ultraviolet resin film 1 202, and between the ultraviolet resin film 2 302 and the polyester film 1 201, and thus the delamination phenomenon between the polarizing film 1 and the prism optical film 1 2, and between the prism optical film 1 2 and the prism optical film 2 3 can be reduced.

[0044] Refer to the instruction manual Figure 1 , 2 , 3 and 9, the outer walls of the polarizing film 1, the polyester film 1 201 and the polyester film 2 301 are all fixedly bonded with a protective film 9, the inner wall of the protective film 9 is fixedly bonded with a thermal conductive film 10, and the inner wall of the thermal conductive film 10 is coated with a light-shielding paint 11. The light-shielding paint 11 can improve the light-shielding property of the protective film 9, thereby reducing the penetration of light;

[0045] In addition, the outer wall surface of the protective film 9, the inner wall surface of each heat dissipation hole 1 7, the inner wall surface of each heat dissipation hole 2 8 and the inner wall surface of each heat dissipation hole 3 12 are all coated with antibacterial coating 13. The antibacterial coating 13 can improve the antibacterial effect of the protective film 9, polyester film 1 201 and polyester film 2 301.

[0046] By setting a protective film 9 on the outer wall of the polarizing film 1, the prism optical film 1 2 and the prism optical film 2 3, the protective film 9 can play a protective role on the side of the prism optical film 1 2 and the prism optical film 2 3, and at the same time, a light-shielding paint 11 is applied on the protective film 9 to reduce the penetration of light and thus reduce the consumption of light energy, and a heat-conducting film 10 is set on the inner wall of the protective film 9 to accelerate the heat dissipation effect of the polarizing film 1, the prism optical film 1 2 and the prism optical film 2 3.

[0047] Refer to the instruction manual Figure 1-9 The outer walls of the front and rear sides of the protective film 9 are provided with a plurality of heat dissipation holes three 12, which are respectively connected with the plurality of heat dissipation holes one 7 and the plurality of heat dissipation holes two 8. The heat dissipation holes three 12 cooperate with the heat dissipation holes one 7 and the heat dissipation holes two 8 to realize the circulation of air inside the polyester film one 201 and the polyester film two 301, thereby realizing the heat dissipation of the polyester film one 201 and the polyester film two 301.

[0048] By setting a plurality of heat dissipation holes 7 on the polyester film 201, the heat dissipation inside the polyester film 201 can be improved by using the heat dissipation holes 7. A plurality of heat dissipation holes 28 are set at the front end of the polyester film 2 301, which can also dissipate the heat of the polyester film 2 301. At the same time, a plurality of heat dissipation holes 3 12 are set on the protective film 9 to achieve air circulation, thereby preventing the polyester film 201 and the polyester film 2 301 from expanding due to high temperature, thereby reducing the problem of deformation of the polyester film 201 and the polyester film 2 301.

[0049] The present invention also includes a process for preparing the polarizing film 1, and the specific steps are as follows:

[0050] Step 1: Use a resin granulator to fully fuse the resin and PEN material together. The fused material is extruded into strips by the resin granulator. The strips are cooled in a cooling tank and then transported to a pelletizing device. The pelletizing device is used to cut the strips into masterbatches.

[0051] Step 2: transporting the masterbatch to an extrusion device, and using the extrusion device to extrude to form a base film;

[0052] Step 3: Use a stretching device to stretch the base film in step 2 to form a polyester film 1 201 and a polyester film 2;

[0053] Step 4: Using a hot pressing device to bond the second ultraviolet resin film 302 on top of the first polyester film 201 and the second polyester film 301;

[0054] Step 5: Use a hard mold to press out wavy patterns on the surface of the UV resin film 1 202 and the UV resin film 2 302, and use a UV lamp to irradiate the UV resin film 1 202 and the UV resin film 2 302, and use a laminating device to laminate the UV resin film 1 202 and the polarizing film 1, and the UV resin film 2 302 and the polyester film 1 201 together;

[0055] Step 6: Use a glue injection device to apply a layer of adhesive on the surface of the polarizing film 1, and then use a laminating device to bond the polarizing film 1 and the prismatic optical film 2 together, and then bond the prismatic optical film 2 and the prismatic optical film 3 together, and use a drying chamber to dry the bonded polarizing film 1, the prismatic optical film 2 and the prismatic optical film 3 to obtain the product;

[0056] Step 7: The protective film 9 is bonded to the outer wall of the product in step 6, and the connecting film 16 is bonded to the outer wall of the protective film 9 to obtain the final product.

[0057] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A compensation film, comprising a polarizing film (1), characterized in that: The bottom end of the polarizing film (1) is fixedly bonded with a prismatic optical film (2), and the bottom end of the prismatic optical film (2) is fixedly bonded with a prismatic optical film (3); The prism optical film 1 (2) comprises a polyester film 1 (201), the top of which is fixedly bonded with an ultraviolet resin film 1 (202), and the prism optical film 2 (3) comprises a polyester film 2 (301), the top of which is fixedly bonded with an ultraviolet resin film 2 (302), the cross-sections of the ultraviolet resin film 1 (202) and the ultraviolet resin film 2 (302) are arranged in a wavy shape, the tops of the ultraviolet resin film 1 (202) and the ultraviolet resin film 2 (302) are both provided with a plurality of reflection surfaces (4) and a plurality of refraction surfaces (5), the bottoms of the polarizing film (1) and the polyester film 1 (201) are both processed with wavy printing grooves (6) adapted to the ultraviolet resin film 2 (302), and the tops of the ultraviolet resin film 1 (202) and the ultraviolet resin film 2 (302) are respectively arranged inside the two wavy printing grooves (6); The front end of the polyester film 1 (201) is provided with a plurality of heat dissipation holes 1 (7), and the bottom end of the polyester film 2 (301) is provided with a plurality of heat dissipation holes 2 (8).

2. A compensation film according to claim 1, characterized in that: The outer walls of the polarizing film (1), polyester film 1 (201) and polyester film 2 (301) are all fixedly bonded with protective films (9), the inner walls of the protective films (9) are fixedly bonded with thermal conductive films (10), and the inner walls of the thermal conductive films (10) are coated with light-shielding paint (11).

3. A compensation film according to claim 2, characterized in that: The outer walls on both the front and rear sides of the protective film (9) are provided with a plurality of heat dissipation holes three (12), and the plurality of heat dissipation holes three (12) are respectively connected to the plurality of heat dissipation holes one (7) and the plurality of heat dissipation holes two (8).

4. A compensation film according to claim 3, characterized in that: The outer wall surface of the protective film (9), the inner wall surface of each heat dissipation hole one (7), the inner wall surface of each heat dissipation hole two (8) and the inner wall surface of each heat dissipation hole three (12) are all coated with antibacterial coating (13).

5. A compensation film according to claim 1, characterized in that: The tops of the ultraviolet resin film 1 (202) and the ultraviolet resin film 2 (302) are both fixedly provided with a plurality of protrusions (14), the bottoms of the two wave-shaped printing grooves (6) are both provided with a plurality of grooves (15) adapted to the protrusions (14), and the plurality of protrusions (14) are respectively arranged in the plurality of grooves (15).

6. A compensation film according to claim 2, characterized in that: The bottom end of the protective film (9) is connected to a connecting film (16), and the outer wall of the connecting film (16) is provided with a hot melt adhesive layer (17) bonded to the backlight source of the display screen.

7. A process for preparing the compensation film according to any one of claims 1 to 6, characterized in that: The specific steps are as follows: Step 1: Use a resin granulator to fully fuse the resin and PEN material together. The fused material is extruded into strips by the resin granulator. The strips are cooled in a cooling tank and then transported to a pelletizing device. The pelletizing device is used to cut the strips into masterbatches. Step 2: transporting the masterbatch to an extrusion device, and using the extrusion device to extrude to form a base film; Step 3: Using a stretching device to stretch the base film in step 2 to form a polyester film 1 (201) and a polyester film 2; Step 4: Using a hot pressing device to bond the second ultraviolet resin film (302) on top of the first polyester film (201) and the second polyester film (301); Step 5: using a hard mold to press out wavy patterns on the surfaces of the UV resin film 1 (202) and the UV resin film 2 (302), and using a UV lamp to irradiate the UV resin film 1 (202) and the UV resin film 2 (302), and using a laminating device to laminate the UV resin film 1 (202) and the polarizing film (1), and the UV resin film 2 (302) and the polyester film 1 (201); Step 6: Use a glue injection device to apply a layer of adhesive on the surface of the polarizing film (1), and then use a bonding device to bond the polarizing film (1) and the prismatic optical film (2), and then bond the prismatic optical film (2) and the prismatic optical film (3) together, and use a drying chamber to dry the bonded polarizing film (1), the prismatic optical film (2) and the prismatic optical film (3) to obtain a product; Step 7: The protective film (9) is bonded to the outer wall of the product in step 6, and the connecting film (16) is bonded to the outer wall of the protective film (9) to obtain the final product.

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