Laminating film for liquid crystal display, and liquid crystal display backlight module

Abstract

The invention discloses a laminating film for a liquid crystal display (LCD), and a liquid crystal display backlight module. The laminating film for the LCD comprises a first structural layer film, asecond structural layer film, and a composite glue layer; the first structure layer film comprises a first base film, a first prism layer and a back coating; the first prism layer is formed by continuously arranging multiple first prisms, the first prism layer is arranged on an upper surface of the first base layer, and the back coating is arranged at a lower surface of the first base film; the structure layer film comprises a second base film and a second prism layer; the second prism layer is formed by continuously arranging multiple second prisms; the second prism layer is arranged on the upper surface of the second base film; the composite glue layer comprises PBMA or PMMA microspheres; and the first prisms are laminated on the second base film through the composite glue layer. In thepremise of ensuring that the brightness can achieve a liquid crystal display product requirement, the masking can achieve the requirement, thereby ensuring that the interference and the glare are avoided, and the visual effect reaches the standard.

Description

technical field [0001] The invention relates to a bonding film for a liquid crystal display and a backlight module of a liquid crystal display. Background technique [0002] With the popularization of TFT-LCD liquid crystal display technology, the demand for its backlight module and related optical films is also increasing. The previously adopted 4-diaphragm structure of lower diffusion, 90-degree brightening, 0-degree brightening, and upper diffusion is gradually replaced by three or even two diaphragms. With the increasing size of liquid crystals, higher requirements for stiffness, continuous thinning of products, and increasingly simplified assembly requirements for film assembly in assembly lines, DOP (increasing brightness + diffusion) laminating films and POP (increasing brightness) also appeared on the market. + lightening) laminating film, but the low brightness of DOP in the existing technology is not suitable for the use of many high-resolution LCD screens, result...

AI Technical Summary

Problems solved by technology

In order to save cost, there are two ways of enhancing the brightness: the lower enhancement is mostly used (high transparency or high fog) enhancement, and the upper enhancement is generally used to solve the interference problem with small spacing (16-25 microns) enhancement, such a small spacing enhancement when cutting It needs to be turned to different angles according to the matching with the LCD screen, generally 3-8 degrees, which not only increases the cost of materials due to the increase in material loss, but also replaces the LCD screen to verify the matching work is cumbersome, prolonging the lead-in cycle and cost; Low luminance requires the use of high-refractive index resins to increase luminance, resulting in increased costs, and low production and assembly yields due to the small-pitch structure and poor scratch resistance; Small-pitch brightening products have poor shielding performance and can be clearly seen with slight deformation; and when applied to large sizes, the stiffness of a single diaphragm is insufficient and easy to wrinkle, which is limited for large-size applications; cutting and assembling the other two diaphragms separately will cause Increased risk of poor manufacturing process, increased rework rate leading to increased loss

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