Large Backlight Plate
Product Name: Large Decorative Backlight Panel
Material: Light guide plate, diffuser film, reflective film, LED strip, light-shielding strip
Size: Customizable
Thickness: 1.2mm and above (customizable)
Advantages: Customizable light effect
Uniform light emission
Long service life
- Fast Delievery
- Quality Assurance
- 24/7 Customer Service
Product Introduction
Rina Technology Co., Ltd. is one of the leading manufacturers and suppliers of large backlight plate 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
Introduction to Large Backlight Plates
Large backlight plates are core optical components in liquid crystal display (LCD) modules, primarily used in large-size display terminals, ranging from 13 inches to 85 inches and above. Their size, thickness, and shape can be customized to meet specific needs.
As the "light control center" of the LCD display system, it does not emit light itself. Instead, through a precise optical structure, it transforms the point or line light source of LED strips into a uniform and stable surface light source, providing an ideal optical foundation for the liquid crystal layer.
This directly determines the brightness uniformity, visual effect, and overall performance of large-size displays. Its core components include a light guide plate, diffusion film, reflective film, LED strips, and aluminum profiles, made from PMMA, PC, or a blend of both.
These materials feature high light transmittance, high temperature resistance, and impact resistance, adapting to the needs of various applications. They are a crucial prerequisite for achieving clear and uniform display in large-size display devices.
Functions of the Large Backlight Plate
1. - High-efficiency light guiding and uniform light distribution: This is its core function. Through the microstructure design of the light guide plate (such as laser-engraved dots and prism arrays) and the scattering effect of the diffusion film, the light from the side or bottom-mounted LED strips is efficiently conducted and uniformly diffused, transforming point/line light sources into a uniform surface light source across the entire screen. This eliminates dark areas, bright areas, and hot spots, ensuring consistent brightness across the entire large-size panel. Brightness uniformity can reach over 85%, providing a fundamental guarantee for clear display.
2. - High brightness output and adjustment: Equipped with high-power LED strips and high-efficiency optical materials, it achieves high-brightness illumination, meeting the needs of outdoor displays and high-brightness presentations. It also supports brightness adjustment, flexibly adapting to changes in ambient light, balancing visual experience and energy consumption control. Some products achieve ERP Class A energy efficiency (ηtm≥120 lm/w).
3.- Image Quality Support: Utilizing high-transmittance materials (≥92%) and precision machining processes, it reduces light refraction loss and stray light interference, ensuring light purity. This provides the foundation for high-definition display and wide color gamut presentation on large-size screens, resulting in clearer image details and more realistic colors, meeting the demands of high-end displays.
4. - Stable Protection and Heat Dissipation: Possessing certain high-temperature resistance and impact resistance, it protects internal components such as LED strips from minor external impacts. Simultaneously, through an aluminum profile casing and a rational LED strip layout, it quickly dissipates heat generated during operation, preventing performance degradation caused by high temperatures, ensuring long-term stable operation, and extending the equipment's lifespan.
Production Process of Large Backlight Plate
1. Raw Material Selection and Preparation: High-transmittance and high-stability materials are prioritized, primarily PMMA, PC, or blends of both (haze value ≤3%). Auxiliary components such as reflective films, diffusion films, LED strips, aluminum profiles, and UV-curable adhesives are also prepared. All raw materials must undergo tests for transmittance, heat resistance, and other indicators to ensure compliance with production standards. Some high-end products utilize new materials such as MS resin and COC to enhance performance.
2. Light Guide Plate Molding and Microstructure Processing: The main body of the light guide plate is manufactured through injection molding, laser engraving, or printing processes. Injection molding can directly produce light guide plates with microstructures, suitable for mass production; laser engraving can achieve precision dots ≤10μm, meeting high-end demands; printing processes have lower costs and are suitable for mid-to-low-end large-size products. During processing, 3D optical simulation is used to optimize the dot layout to ensure uniform light guiding.
3. Composite of Reflective Layer and Optical Film: A metal reflective layer (mostly aluminum-based silver-plated composite material with a reflectivity ≥95% and a honeycomb microstructure etched on the surface) is composited onto the bottom surface of the light guide plate using a hot-pressing process to maximize reflected light and improve light utilization. Subsequently, diffuser films, prism sheets, and other optical films are sequentially laminated onto the surface of the light guide plate using automated equipment to avoid air bubbles and misalignment, ensuring stable optical performance.
4. LED Strip Installation and Fixing: A groove is pre-drilled along the edge of the light guide plate. A graphene conductive coating is applied to the bottom of the groove, and an LED strip assembly with heat dissipation fins is embedded. A dual fixing method, combining welding and electromagnetic attraction coupling, is used to ensure installation accuracy. Subsequently, a UV-curable adhesive doped with nanoparticles is used to fill the gap between the strip and the groove, forming an optical diffusion layer to improve light uniformity and heat dissipation.
5. Cutting, Packaging, and Assembly: A CO₂ laser is used to cut the backlight panel in segments along a pre-set stress groove, forming the main backlight panel structure in one go, avoiding burrs and stress concentration caused by mechanical cutting. Then, the entire backlight panel is packaged and fitted with an aluminum profile shell, completing the overall assembly and ensuring structural stability and good heat dissipation. An interface is also provided for easy connection with the display panel.
6. Finished Product Inspection and Shipment: A comprehensive inspection is conducted on the molded Large backlight plate, including indicators such as brightness uniformity, light transmittance, heat dissipation performance, voltage stability, and surface flatness. Unqualified products are rejected. After passing inspection, the plate is cleaned, packaged, and labeled with specifications, completing the shipment process. For some customized products, sample delivery can be achieved in 3-5 days, and batch delivery in 2-3 weeks.
Application scenarios of Industrial Backlight
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: What is the maximum size that the Large backlight plate supports? Is customization supported?
A1: Currently, the standard supported size range is 13 inches to 85 inches. For special scenarios, ultra-large sizes of 100 inches and above can be customized. Thickness (standard 0.5-5mm), shape (flat, curved, etc.), and color (white, RGB, etc.) can be flexibly customized according to device requirements to adapt to the installation and usage needs of different large-size display devices.
- Q2: How can its brightness uniformity reach over 85%? What is the core guarantee?
A2: The core guarantee of brightness uniformity comes from two aspects: First, the precise microstructure design of the light guide plate (laser-engraved dots, prism array, etc.) enables efficient light transmission and uniform dispersion; second, the synergistic effect of multiple optical films (diffuser film, prism sheet) eliminates dark areas, bright areas, and hot spots. Combined with high-purity optical materials, this ultimately achieves brightness uniformity of over 85%, with some high-end products reaching over 90%.
- Q3: How do you ensure the high-temperature resistance and impact resistance of the large backlight plate for outdoor use?
A3: Outdoor products improve adaptability primarily through two aspects: In terms of materials, we use high-temperature resistant (withstanding environments from -20℃ to 80℃) and impact-resistant PMMA/PC blend materials. Some high-end products add UV stabilizers to prevent aging from sun exposure. Structurally, we equip the product with a thickened aluminum profile shell, which enhances impact resistance, allows for rapid heat dissipation, and provides a sealed design to prevent dust and moisture ingress, ensuring long-term stable operation outdoors.
- Q4: Which stages in the production process directly affect the product's optical performance?
A4: There are three core influencing stages: First, raw material selection; substandard transmittance and haze directly reduce light utilization. Second, the microstructure processing of the light guide plate; dot accuracy and layout determine the uniform light effect. Third, optical film lamination; air bubbles and misalignments can generate stray light, affecting display clarity. Therefore, this stage must be completed in a cleanroom using automated equipment.
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