Backlight Assembly for LCD Displays

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. 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. This product is used in a range of applications, from small portable devices to large monitors and televisions. The backlight assembly is characterized by parameters such as screen size (7–75 inches), brightness (250–1000 cd/m²), color temperature (5000–10000 K), uniformity (≥80%), operating temperature (-20–70 °C), storage temperature (-30–80 °C), input voltage (9–36 V DC), power consumption (5–50 W), LED lifetime (30000–50000 hours), thickness (1.5–10 mm), weight (0.1–5 kg), and interface (LVDS/eDP). These values are typical ranges and must be verified for the specific model and application. The assembly is designed for integration into LCD display systems, and its performance directly affects the visual quality and reliability of the display. Proper handling and installation are essential to avoid damage to the optical components. The backlight assembly is a key part in the manufacturing of electronic displays, and its quality is crucial for end-user satisfaction. Buyers should confirm all specifications with the legal manufacturer or supplier before procurement.

Working Principle

The backlight assembly operates by using LED chips as the light source. The emitted light enters a light guide plate (LGP), which distributes it across the entire display area. Reflective film at the back redirects light forward, while diffuser film and prism film enhance uniformity and brightness. The light then passes through the LCD panel, where liquid crystal cells and color filters modulate it to form the image. The assembly ensures even illumination, which is critical for display clarity.

Common Materials

LED chips, Light guide plate (LGP), Reflective film, Diffuser film, Prism film

Technical Parameters

Parameter	Typical range	Notes & selection driver
Screen Size	7–75 inch	Diagonal size of the LCD panel
Brightness	250–1000 cd/m²	Typical luminance for indoor/outdoor use
Color Temperature	5000–10000 K	Adjustable for display calibration
Uniformity	≥80 %	Luminance uniformity across the active area
Operating Temperature	-20–70 °C	Ambient temperature range for reliable operation
Storage Temperature	-30–80 °C	Non-operating temperature limits
Input Voltage	9–36 V DC	Wide input range for various power supplies
Power Consumption	5–50 W	Depends on size and brightness
LED Lifetime	30000–50000 h	Time to 70% lumen maintenance
Thickness	1.5–10 mm	Overall assembly thickness
Weight	0.1–5 kg	Depends on size and materials
Interface	LVDS/eDP	Connection to display driver

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

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 Part
Redirects downward light back toward the display to improve efficiency

Material: PET with reflective coating
Diffuser Film Part
Scatters light to eliminate hotspots and create uniform illumination

Material: PET with diffusing particles
Prism Film Part
Increases brightness by focusing light in the normal viewing direction

Material: PET with micro-prism structures

Applied To / Applications

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

Display

View system integration details

Manufacturers of Backlight Assembly

Manufacturer profiles associated with Backlight Assembly.

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Frequently Asked Questions

What is the typical screen size range for this backlight assembly?

The typical screen size range is 7 to 75 inches, but this must be confirmed for the specific model.

What is the expected LED lifetime?

The LED lifetime is typically 30,000 to 50,000 hours, based on time to 70% lumen maintenance. Actual lifetime depends on operating conditions.

What interface does the backlight assembly use?

The interface is typically LVDS or eDP, which connects to the display driver. Confirm compatibility with your system.

What are the operating temperature limits?

The operating temperature range is -20 to 70 °C, and storage temperature is -30 to 80 °C. Ensure the environment meets these limits.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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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)

Backlight Assembly

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards