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TV Diffuser Sheet

Product Name: TV Backlight Diffuser Sheet
Thickness: 0.12–3.0 mm
Size: Compatible with 32–98 inch TVs; custom cutting available
Light Transmittance: 60–80%
Advantages: Uniform light diffusion (eliminates lamp shadows), high heat resistance with low shrinkage, high light transmission, anti-static, and scratch-resistant.

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Product Introduction

Rina Technology Co., Ltd. is one of the leading manufacturers and suppliers of tv diffuser sheet in China. Welcome to wholesale durable products in stock here and get quotation from our factory. All customized products are with high quality and low price.

Products Description

I. Product Overview: TV Diffuser Sheet

The TV diffuser sheet-a critical optical film component within the backlight modules of LCD and Mini-LED televisions-is a key consumable in the backlight optical supply chain. Manufactured via an extrusion process that combines eco-friendly PMMA or PC polymer substrates with optical diffusion additives.

Unlike standard lighting diffuser sheets, TV diffuser sheets are precision-engineered to meet the optical standards of television displays, balancing four core attributes: high light transmission, low light loss, high-temperature resistance, and dimensional stability.

Moving beyond traditional frosted diffusion techniques, the product employs a composite approach-integrating nano-diffusion particles within the substrate while applying surface micro-texturing-to eliminate visual defects such as hotspots, lamp shadows, and uneven brightness (bright/dark edges).

Designed to support 4K and 8K high-definition display requirements and withstand the high temperatures associated with prolonged operation, the product offers a service life that aligns with the television's overall lifespan, serving as a vital optical component for optimizing screen luminance quality and ensuring display stability.

2. Material composition of TV Diffuser Sheet

Material	Properties	Common Uses
PMMA	High light transmittance (92%), strong weather resistance, high cost, easy to scratch	High-end lamps, advertising light boxes
PC	Good impact resistance (explosion-proof), high temperature resistance, but easy to yellow under long-term ultraviolet radiation	Car lights, outdoor display screens
PS	Low cost, lightweight, low light transmittance (about 88%), easy to crack	Ordinary indoor lighting, packaging materials

II. Core Functions of TV Diffuser Sheets

2.1 Light Source Uniformity Enhancement
The primary function of the TV diffuser sheet is to restructure and homogenize the light source. It transforms the concentrated, intense light emitted by point-source LEDs or linear LED strips into a uniform, soft planar backlight. This is achieved through a triple-action optical process-involving refraction, diffusion, and transmission via internal nanoparticles-which disperses localized hotspots.
2.2 Image Quality Optimization and Light Control
TV diffuser sheets precisely control the light emission angle, filtering out stray light, glare, and chromatic dispersion. They optimize backlight color temperature uniformity, preventing issues such as yellow or blue tints and localized color shifts. Furthermore, they work in synergy with brightness-enhancing films and reflective films to improve light utilization efficiency;

Structural Composition of TV Diffuser Sheets

3.1 Overall Layered Structure

Mass-produced commercial TV diffuser sheets utilize an integrated three-layer co-extrusion structure, eliminating the need for post-production adhesive lamination. The structure comprises three main modules: a core substrate layer, a middle light-diffusing modified layer, and a functional protective surface layer. This integrated molding design prevents delamination and adhesive yellowing, making it suitable for the sealed, high-temperature assembly environments of TV backlights.

3.2 Core Substrate Layer

The core substrate layer serves as the primary structural support, accounting for over 85% of the total thickness. High-purity GPPS (polystyrene) is the standard choice for the substrate, while PMMA (acrylic) is used for high-end large-screen and Mini-LED TVs; key characteristics include high light transmission, low water absorption, and excellent dimensional stability.

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3.3 Middle Light-Diffusing Modified Layer

The middle light-diffusing modified layer acts as the core optical functional layer. It features a uniform blend of composite diffusing particles-specifically nano-silica and organic acrylic-with particle sizes calibrated for even distribution and no agglomeration. By leveraging the refractive index difference between the particles and the polymer substrate, the layer achieves multiple light scattering; this is the critical mechanism for ensuring uniform light distribution, eliminating hotspots, and controlling color temperature. Unlike standard single-layer additive processes, this design improves light diffusion efficiency by more than 15%. 3.4 TV Diffuser Sheet: Functional Protective Surface Layers
Ultra-thin functional coatings are applied to both the top and bottom surfaces of the sheet. The top side (facing the panel) features an anti-scratch and anti-glare coating to prevent assembly-related scratches and glare during direct viewing.

Application scenarios of TV Diffuser Sheets

1. LED lighting

2. Display devices

3. Advertising signage

4. Automotive lighting

RINA TECHNOLOGY

is a high-tech enterprise specializing in research, development, production ,sales of Optical LED products and provide the one step optical lighting solution for customers.Established in 2011, Hong Kong, after years of rapid development, Rina Tech has settled office and factory in Shenzhen,and has professional senior technicians and qualified managers,has a talented team for product research and designing.

Nowadays, we have laser cutting machines, printers, film cutting machines, injection molding equipments,high-standard assembly workshops, BM-7 clean machines and other advanced equipments.

Our factory daily output is more than 80000pcs. to cater for the market at home and abroad.With years of unremitting effort,RINA TECH has passed get the Registration Certificate ofCustoms Declaration Unit of the People's Republic of China , National Credit Cultivation Certificate and Get our own Brand already.
We has made many breakthroughs in researching and manufacturing and has
obtained lots of good reputation from oversea customers.

Now we has cooperated with and become strategic partner of some famous enterprises such as LG, Samsung, Lenovo etc."Living on Sincerity, following with Market, Advancing by Specialty" is our eternal philosophy,and the company motto is "Good at Production, Good for Society".

We look forward to cooperating with you to make the world better and future brighter!

FAQ

Q1: Can TV diffuser sheets and standard lighting diffuser sheets be used interchangeably?

A: No, they are not directly interchangeable. TV diffuser sheets undergo specialized optical tuning for color temperature, brightness, heat resistance, and dimensional stability to match the color gamut parameters of LCD panels. In contrast, standard lighting diffuser sheets feature coarse diffusing particles, significant color temperature deviation, and a tendency to shrink at high temperatures; using them as replacements leads to issues such as screen color shifts, visible LED shadows, edge warping, and blurred image quality, failing to meet TV display standards.

Q2: What causes TV diffuser sheets to yellow and experience reduced light transmission?

A: There are three primary causes: first, the use of low-end recycled base materials, which oxidize and yellow after prolonged high-temperature operation; second, wear on the sheet's protective coating, allowing dust and oil to penetrate the diffusing layer; and third, heat dissipation failures in the TV backlight module, where prolonged exposure to excessive heat accelerates the aging of optical additives. The solution is to replace the sheet with a new one made from virgin material and optimize the module's heat dissipation.

Q3: Do TVs of different sizes require custom-specified TV diffuser sheets?

A: Yes, dimensions, thickness, and microstructures must all be customized to match the specific application. Thin film-type diffuser sheets are used for small home TVs, while thicker, high-uniformity sheets are required for large commercial displays and Mini-LED backlight TVs. Additionally, the ratio of diffusing particles must be adjusted in tandem with LED layout density; using generic, non-standard cut sheets results in uneven brightness across the screen.

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