Method for preventing orange peel phenomenon of liquid crystal screen and grating film full lamination

Abstract

The present application belongs to the technical field of liquid crystal screen processing, and particularly relates to a method for preventing orange peel phenomenon of a liquid crystal screen and a grating film. The method comprises the following steps: step one: patching, patching the grating film with back adhesive and the liquid crystal screen by using a roll-to-sheet patching mode to form a patching product; the patching humidity is maintained within 40%, and the temperature is normal room temperature; step two: bubble removal, placing the patching product into a bubble removal mechanism, initially normal room temperature, initial air pressure is atmospheric pressure, temperature and pressure rising time is 30 minutes, temperature is raised to 80 degrees, and pressure is raised to 7 kg; step three: pressure maintaining, continuously pressing the patching product; step four: pressure reduction, reducing the pressure and temperature of the patching product. The method for preventing orange peel phenomenon of the liquid crystal screen and the grating film has the effect of preventing the deformation caused by uneven OCA optical stress due to uneven patching roller pressure, thereby preventing the patching product from generating orange peel phenomenon, and improving the appearance effect of the patching product.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of grating films, and particularly relates to a method for preventing orange peel phenomenon of a liquid crystal screen and a grating film. BACKGROUND

[0002] In LCD display screen products, full bonding process gradually becomes a popular trend. For example, a reflective sheet is fully bonded with a back plate, which can prevent the influence of deformation of the reflective sheet on the backlight effect. An optical film sheet can also be fully bonded with a direct type diffusion plate to prevent the display picture effect from being degraded due to deformation of the film material. Similarly, a liquid crystal screen can also be fully bonded to further enhance the display effect or the stability of the mechanism. However, since the liquid crystal screen is an imaging component in the display and is the outermost component in the display, when uneven bonding occurs in the full bonding, the display picture effect will be directly affected.

[0003] OCA optical adhesive is the most widely used optical adhesive in full bonding. It has high light transmittance, strong viscosity and long service life, which are its irreplaceable advantages. However, as a pressure-sensitive adhesive, if the pressure of each area of the bonded product cannot be kept highly consistent during bonding, different local deformation amounts of OCA may occur due to uneven local pressure, which may cause the bonded product to present orange peel phenomenon after being lighted. If this phenomenon occurs in the full bonding process of the liquid crystal screen, the display picture effect will be seriously affected. SUMMARY

[0004] The purpose of the present application is to provide a method for preventing orange peel phenomenon of a liquid crystal screen and a grating film, so as to solve the technical problem that different local deformation amounts of OCA may occur due to uneven local pressure, which may cause the bonded product to present orange peel phenomenon after being lighted. The purpose is to prevent different deformation amounts of OCA caused by uneven pressure of the bonding roller, which may cause the bonded product to present orange peel phenomenon, and to improve the appearance effect of the bonded product.

[0005] In order to solve the above technical problem, the present application provides a method for preventing orange peel phenomenon of a liquid crystal screen and a grating film, which comprises the following steps:

[0006] Step 1: bonding, bonding the grating film with adhesive with the liquid crystal screen by using roll-to-sheet bonding method to form a bonded product; the bonding humidity is maintained within 40%, and the temperature is normal room temperature;

[0007] Step 2: bubble removal, placing the bonded product into a bubble removal mechanism, the initial normal room temperature, the initial air pressure is atmospheric pressure, the temperature and pressure rising time is 30 minutes, the temperature is raised to 80 degrees, and the pressure is raised to 7 kg;

[0008] Step 3: pressure maintaining, continuously pressing the bonded product;

[0009] Step four: pressure reduction, the pressure and temperature of the bonded product are reduced, the pressure returns to atmospheric pressure, and the temperature returns to room temperature.

[0010] Further, in step one, the tension of the film material is controlled at 15-17N during bonding, and the bonding pressure is maintained at 2-3kg.

[0011] Further, in step three, the pressure application time of the bonded product is 20 minutes, the pressure is maintained at a constant 7kg, and the temperature is maintained at a constant 80 degrees.

[0012] Further, in step four, the pressure reduction time of the grating film is 10 minutes.

[0013] Further, the defoaming mechanism comprises a cylindrical placement chamber, a heating element arranged in the cylindrical placement chamber, and an exhaust fan arranged at the circular end face of the cylindrical placement chamber.

[0014] Further, the heating element comprises a plurality of heating pipes arranged in the cylindrical placement chamber and a fixing frame for fixing the heating pipes.

[0015] The beneficial effects of the present application are:

[0016] 1. By expanding the bonded product and applying temperature and pressure and maintaining pressure, the deformation caused by uneven pressure of the bonding roller and uneven optical stress of OCA is prevented, which leads to different deformation amounts and causes orange peel phenomenon of the bonded product, thereby improving the appearance effect of the bonded product.

[0017] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0019] Fig. 1 is a structural schematic diagram of the method for preventing orange peel phenomenon of liquid crystal screen and grating film of the present application;

[0020] Fig. 2 is a side view of the defoaming mechanism of the method for preventing orange peel phenomenon of liquid crystal screen and grating film of the present application.

[0021] In the drawings:

[0022] 1. bubble-removing mechanism; 11. cylindrical placement chamber; 12. heating member; 121. heating pipe; 122. fixing frame; 13. exhaust fan. DETAILED DESCRIPTION

[0023] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be described below in connection with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0024] Embodiment:

[0025] As shown in Figs. 1-2 , a method for preventing orange peel phenomenon of liquid crystal screen and grating film, comprising the following steps:

[0026] Step one: patching, patching the grating film with adhesive with the liquid crystal screen, using the roll-to-sheet patching method to form a patching product; the patching humidity is maintained within 40%, and the temperature is normal room temperature; when patching, the tension of the film material is controlled at 15-17N, and the patching pressure is maintained at 2-3kg; the film material is preliminarily fixed by tension and pressure.

[0027] Step two: bubble removal, placing the patching product into the bubble-removing mechanism, the initial normal room temperature, the initial atmospheric pressure, the temperature and pressure rising time is 30 minutes, the temperature rises to 80 degrees, and the pressure rises to 7kg; Step three: pressure maintaining, continuously pressing the patching product, the pressure maintaining time of continuously pressing the patching product is 20 minutes, the pressure is maintained at a constant 7kg, and the temperature is maintained at a constant 80 degrees; the bubbles in the patching product are discharged by rising pressure and pressure maintaining, thereby improving the quality of the patching product.

[0028] Step four: pressure reduction, reducing the pressure and temperature of the patching product, the pressure returns to atmospheric pressure, and the temperature returns to room temperature; the pressure reduction time of the grating film is 10 minutes.

[0029] As shown in Fig. 1 and Fig. 2 , the bubble-removing mechanism comprises a cylindrical placement chamber, a heating member arranged in the cylindrical placement chamber, and an exhaust fan, the exhaust fan is arranged at the circular end face of the cylindrical placement chamber. The heating member comprises a plurality of heating pipes arranged in the cylindrical placement chamber and a fixing frame for fixing the heating pipes. The user places the patching product in the cylindrical placement chamber, and uniformly heats the patching product by the annular heating pipes.

[0030] In summary: by opening the attached product, and heating and pressurizing and holding pressure, thereby preventing the uneven deformation caused by uneven pressure of the attached roll, and preventing the uneven deformation of the attached product from causing orange peel phenomenon, and improving the appearance of the attached product.

[0031] Each device selected in the present application is a general standard part or a component known to those skilled in the art, and its structure and principle can be known to those skilled in the art through a technical manual or through a conventional experimental method.

[0032] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and must be determined by the scope of the claims.

Claims

1. A method of preventing orange peel phenomenon in liquid crystal panel and grating film, characterized by, The method comprises the following steps: Step 1: patching, patching the back glue grating film and the liquid crystal screen, using the roll-to-sheet patching method to form a patching product; the patching humidity is maintained within 40%, and the temperature is normal room temperature; Step 2: defoaming, the patching product is put into the defoaming mechanism, the initial normal room temperature, the initial air pressure is atmospheric pressure, the temperature and pressure rising time is 30 minutes, the temperature rises to 80 degrees, and the pressure rises to 7kgf / c㎡; Step 3: pressure maintaining, the patching product is continuously pressed; Step 4: pressure reducing, the patching product is reduced in pressure and temperature, the pressure returns to atmospheric pressure, and the temperature returns to room temperature; In step 1, when patching, the tension of the film material is controlled at 15-17N, and the patching pressure is maintained at 2-3kgf / c㎡; In step 3, the patching product is continuously pressed for 20 minutes, the pressure is maintained at a constant 7kgf / c㎡, and the temperature is maintained at a constant 80 degrees; In step 4, the pressure reducing time of the grating film is 10 minutes.

2. The method for preventing orange peel phenomenon of liquid crystal screen and grating film according to claim 1, wherein the defoaming mechanism comprises a cylindrical placing chamber, a heating element arranged in the cylindrical placing chamber, and an exhaust fan, and the exhaust fan is arranged on the circular end face of the cylindrical placing chamber.

3. The method for preventing orange peel phenomenon of liquid crystal screen and grating film according to claim 2, wherein the heating element comprises a plurality of heating pipes arranged in the cylindrical placing chamber and a fixing frame for fixing the heating pipes. ​ ​

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