Composite optical film structure with multiple coatings

Abstract

The invention relates to a composite optical film structure with multiple coatings. With a diffusion layer with an interface microstructure as a photo diffusion mechanism, the invention comprises a transparent base material, a multiple coating and a protection coating; wherein a diffusion layer combination of the inner layer of the multiple coating is provided with at least more than one diffusion layer with a port microstructure, a condensation layer at the first surface layer of the multiple coating is provided with an optical rotation microstructure. On the basis, composite design is carried out by light source diffusion as a result of the multiple coating technology and condensation effect; with the optical film structure integrated into an optical film, material cost can be effectively reduced; and when the diffusion layer with the port microstructure serves as the photo diffusion mechanism, not only brightness performance can be effectively improved, meanwhile quality variables created by dispersion of doping ions and film material warpage and the like can also be reduced; as a result, while assembly of a backlight module is simplified to improve assembly efficiency thereof, film material quality and optical property of the composite optical film can also be improved.

Description

Technical field: [0001] The invention relates to a multi-layer coated composite optical film structure, especially an optical film used in a backlight module that uses a diffusion layer with an interface microstructure as a light diffusion mechanism to provide a high-brightness and high-quality light source. Background technique: [0002] Currently, the liquid crystal display device structure with a backlight in a liquid crystal display (LCD) is widely used, which mainly includes a front panel part and a back light source module part. The panel part includes liquid crystal, alignment film, ITO conductive glass, color filter, polarizer and driver IC module, etc., which can provide color control of color screen; while the backlight module part includes cold cathode Tube (Cold Cathode Fluorescent Lamp, CCFL) or Light-Emitting Diode (Light-Emitting Diode, LED) and other light sources, reflectors, light guide plates, diffusers, diffusers and concentrators, etc., can provide high-...

AI Technical Summary

Problems solved by technology

However, according to the design of the above-mentioned composite optical film 5, it is not only difficult to control the warpage variability of the film material, but also the dispersion of the diffusion particles is also prone to complicated technical problems such as variation in uniformity. The particles are easy to cause scratches and defects on the surface of the underlying optical film; at the same time, the light diffusing particles are also easy to reduce the light transmittance, which in turn causes the optical properties of the composite optical film to be impaired

Therefore, it generally cannot meet the expectations of users in actual use.

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