Industry-Verified Manufacturing Data (2026)

Backlight Assembly

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Backlight Assembly used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Backlight Assembly is characterized by the integration of LED Light Bar and Light Guide Plate. In industrial production environments, manufacturers listed on CNFX commonly emphasize LED chips construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A component assembly that provides uniform illumination for LCD displays by generating and distributing light behind the screen.

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Product Specifications

Technical details and manufacturing context for Backlight Assembly

Definition
The backlight assembly is a critical component within display systems that supplies the necessary illumination for LCD panels to become visible. It consists of multiple sub-components working together to generate, diffuse, and direct light evenly across the entire display area, enabling image visibility in various lighting conditions.
Working Principle
The assembly typically uses LED light sources that emit light, which is then diffused through light guide plates and optical films to create uniform brightness across the display surface. The light is directed toward the LCD panel, where it passes through liquid crystal cells and color filters to create the visible image.
Common Materials
LED chips, Light guide plate (LGP), Reflective film, Diffuser film, Prism film
Technical Parameters
  • Overall thickness of the backlight assembly, typically ranging from 0.5mm to 5mm depending on application (mm) Standard Spec
Components / BOM
  • LED Light Bar
    Primary light source consisting of multiple LED chips arranged in a linear array
    Material: LED chips on PCB substrate
  • Light Guide Plate
    Distributes light evenly across the display area through total internal reflection and scattering
    Material: PMMA (acrylic) or polycarbonate
  • Reflective Film
    Redirects downward light back toward the display to improve efficiency
    Material: PET with reflective coating
  • Diffuser Film
    Scatters light to eliminate hotspots and create uniform illumination
    Material: PET with diffusing particles
  • Prism Film
    Increases brightness by focusing light in the normal viewing direction
    Material: PET with micro-prism structures
Engineering Reasoning
3.0-5.5 VDC, 20-80 mA current, -20°C to +70°C ambient temperature
LED junction temperature exceeding 125°C, voltage drop below 2.8 VDC or above 6.0 VDC, current exceeding 100 mA
Design Rationale: Thermal degradation of LED phosphor coating at temperatures above 125°C reduces luminous efficacy by 50% per Arrhenius equation with activation energy of 0.7 eV, causing permanent brightness loss
Risk Mitigation (FMEA)
Trigger Electrostatic discharge exceeding 8 kV HBM (Human Body Model) at LED driver IC input pins
Mode: Gate oxide breakdown in MOSFET switching transistors causing short-circuit current of 500 mA
Strategy: TVS diodes with 5.5 V clamping voltage and 1 pF capacitance placed within 5 mm of IC input pins
Trigger Mechanical stress exceeding 50 MPa on LED solder joints during thermal cycling between -20°C and +70°C
Mode: Solder joint fatigue cracking following Coffin-Manson relationship with exponent n=2.5, increasing electrical resistance from 10 mΩ to 100 mΩ
Strategy: Underfill epoxy with CTE of 25 ppm/°C and glass transition temperature of 120°C applied between LED chips and substrate

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Backlight Assembly.

backlight assembly for LCD displays LED backlight panel components light guide plate for uniform illumination optical film backlight assembly LCD display backlight replacement parts

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Display
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric pressure only (non-pressurized assembly)
other spec: Humidity: 10-90% RH non-condensing, Vibration: 10-500Hz at 1.5G max
temperature: -20°C to +70°C (operating), -40°C to +85°C (storage)
Media Compatibility
✓ Clean room environments ✓ Indoor electronic enclosures ✓ Medical device displays
Unsuitable: Outdoor direct sunlight exposure (UV degradation)
Sizing Data Required
  • Display diagonal size (inches/mm)
  • Required luminance output (nits/cd/m²)
  • Power supply voltage/current (V/A)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
LED Degradation
Cause: Thermal stress from prolonged operation causing phosphor layer deterioration and lumen output reduction
Diffuser Panel Delamination
Cause: UV exposure and thermal cycling weakening adhesive bonds between layers
Maintenance Indicators
  • Inconsistent brightness or dark spots across the display surface
  • Audible buzzing or flickering during operation indicating power supply instability
Engineering Tips
  • Implement thermal management with heat sinks and controlled ambient temperature to reduce LED junction temperature
  • Use UV-resistant materials and periodic inspection of optical layers for early delamination detection

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems IEC 60598-1:2020 - Luminaires - Part 1: General Requirements and Tests CE Marking - Conformité Européenne for EU Market Access
Manufacturing Precision
  • LED Alignment: +/-0.1mm
  • Light Uniformity: +/-10% Luminance Variation
Quality Inspection
  • Luminance and Chromaticity Testing
  • Environmental Stress Screening (ESS) for Thermal Cycling

Factories Producing Backlight Assembly

Verified manufacturers with capability to produce this product in China

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✓ 96% Supplier Capability Match Found

S Sourcing Manager from Australia Feb 25, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
P Procurement Specialist from Singapore Feb 22, 2026
★★★★☆
"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this Backlight Assembly meets all ISO standards. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Germany Feb 19, 2026
★★★★★
"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The Backlight Assembly arrived with full certification."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

12 sourcing managers are analyzing this specification now. Last inquiry for Backlight Assembly from India (30m ago).

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Frequently Asked Questions

What are the key components of a backlight assembly?

A backlight assembly consists of LED chips, a light guide plate (LGP), reflective film, diffuser film, and prism film, all working together to generate and distribute uniform light behind LCD screens.

How does a backlight assembly improve display quality?

By using optical films and precise light distribution, backlight assemblies eliminate hotspots and shadows, providing consistent brightness and enhanced color accuracy across the entire display surface.

What industries use backlight assemblies?

Backlight assemblies are essential in computer, electronic, and optical product manufacturing, including monitors, laptops, televisions, medical displays, and automotive infotainment systems.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Computer, Electronic and Optical Product Manufacturing sector.

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