Optical composite film and preparation method thereof

Abstract

The invention relates to the field of an optical film for a backlight module, in particular to an optical composite film and a preparation method thereof. In order to solve the problem that an existing composite film cannot realize luminance gain, covering performance and interference relieving at the same time, the invention provides the optical composite film and the preparation method thereof.The optical composite film comprises a first layer of optical film and a second layer of optical film, wherein the first layer of optical film is arranged above the second layer of optical film; the first layer of optical film and the second layer of optical film are bonded together through an attaching layer; the first layer of optical film sequentially comprises a micro lens structure layer anda first layer of substrate layer; and the second layer of optical film sequentially comprises a prism layer, a second layer of substrate layer and a back coating layer. The optical composite film provided by the invention has the advantages that the luminance gain effect can be improved; a good covering effect is achieved; and meanwhile, excellent interference relieving performance is realized. Byusing the preparation method of a micro lens film provided by the invention, the production cost of the micro lens structure is greatly reduced.

Description

technical field

[0001] The invention relates to the field of optical films for backlight modules, in particular to an optical composite film and a preparation method thereof. Background technique

[0002] Optical films with brightness enhancement and diffusion functions in the backlight module generally include three types: brightness enhancement film, microlens film, and diffusion film. With the development of liquid crystal display towards the trend of "large size" and "light and thin" in recent years, the demand for high-performance optical films will increase greatly. Under the current trend of ultra-thin optical displays, how to design suitable products to integrate the backlight module Further thinning is a topic that various component factories have begun to consider. Therefore, the optical compounding of enhancement film, microlens film, and diffusion film has become a new research focus because it can adapt to the current trend of ultra-thinning and large-scale. ...

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