Optical slice and manufacture method thereof

Abstract

The embodiment of the invention discloses an optical slice and a manufacture method thereof, belonging to the field of the optical slice. The flaky optical slice is used inside a backlight module, and the surface of the optical slice is provided with a plurality of first micro-structures. The optical slice is characterized by being made of hardened photosensitive hardening adhesive. The method comprises the following steps: applying the photosensitive hardening adhesive which is not hardened to a forming die, wherein a plurality of second micro-structures are arranged on the surface of the forming die, and the photosensitive hardening adhesive is applied to the second micro-structures; covering a pressure plate on the photosensitive hardening adhesive, wherein the pressure plate is formed by a transparent material which hardly performs bridging effect with the photosensitive hardening adhesive; hardening the photosensitive hardening adhesive to form the optical slice; and separating the optical slice from the forming die and the pressure plate. The optical slice provided by the embodiment of the invention has better performance and lower cost.

Description

technical field [0001] The invention belongs to the field of optical sheets, in particular to an optical sheet arranged inside a backlight module. Background technique [0002] In recent years, traditional cathode ray tube (CRT, Cathode Ray Tube) displays have been gradually replaced by liquid crystal displays, mainly because the amount of radiation emitted by liquid crystal displays is much smaller than that of CRT displays, and the manufacturing cost of liquid crystal displays in recent years also decreased significantly. Generally speaking, a liquid crystal display includes a backlight module and a liquid crystal panel. The main function of the backlight module is to provide a light source for the liquid crystal display. [0003] see Figure 1A , Figure 1A Shown is a prior art backlight module. The backlight module 100 includes a cold cathode fluorescent lamp (CCFL, Cold Cathode Fluorescent Lamp) 110, a reflector 120, a diffuser plate 130, a diffuser film 142 and a bri...

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Problems solved by technology

[0007] However, the arrangement of the substrate 144a will increase the material cost

Moreover, after light I1 is incident from the incident surface 144c of the brightness enhancement film 144, it needs to pass through two layers of media (ie, the substrate 144a and the structural layer 144b) before it can be emitted from the exit surface 144d of the brightness enhancement film 144, which will increase the loss of light.

In addition, since the substrate 144a and the structural layer 144b are made of different materials and have different refractive indices, the light I1 needs to be refracted at least three times before it can be emitted from the exit surface 144d of the brightness enhancement film 144, further increasing the loss of light.

Moreover, the designer of the brightness enhancement film 144 also needs to consider more variables during the design, which increases the difficulty of the design.

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