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A must‑read tip! Kimoto will explain what functions diffuser films serve.

Release Date:

2020-08-26 11:29

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A must‑read tip! Kimoto will explain what functions diffuser films serve.

　　Kimoto mylar sheets, aluminum foils, and crystal epoxy resins—when compared in terms of their functional properties and material characteristics—are widely used in a variety of electronic products, including laptops, gaming consoles, game controller handles, audio devices, Bluetooth headphones, mobile phones, cameras, lighting equipment, LEDs, projectors, LCD monitors, and more. From the selection of raw and auxiliary materials through testing, procurement, and the production process, we maintain comprehensive and rigorous technical documentation and standardized manufacturing procedures.

　　Kimoto introduces the function of diffuser sheets:

　　A diffuser is one of the components of a backlight module; it is also referred to as a diffusion sheet. Its primary function is to provide the display with a uniform surface light source.

　　A diffuser is one of the key components of a backlight module; it is also referred to as a diffusion sheet. Its primary function is to provide the display with a uniform surface light source. The substrate material should have high light transmittance, such as PET, PC, or PMMA. Traditionally, diffuser films incorporate microscopic chemical particles within the film matrix to serve as scattering agents. In modern diffuser sheets, these micro‑particles are dispersed throughout the resin layers. As light passes through the diffusion layer, it repeatedly traverses interfaces between media with different refractive indices, resulting in numerous refractions, reflections, and scatterings that collectively produce an optical diffusion effect.

　　The structure of a diffuser typically consists, from bottom to top, of an antistatic coating layer, a PET substrate, and a diffusion layer.

　　The material stack of a backlight module, from bottom to top, consists of a reflector, a light guide plate, a lower diffuser, a prism sheet, and an upper diffuser. The diffuser works by utilizing the refraction and reflection of scattering materials to diffuse the light source and redirect light emitted at small angles toward the front, thereby enhancing front‑side luminance. The lower diffuser primarily concentrates the light exiting the light guide plate and evenly directs it onto the prism sheet, while the upper diffuser’s main function is to further diffuse the light emerging from the prism sheet and ensure uniform light transmission. Additionally, the upper diffuser helps protect the prism sheet.

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