LED Light Bar for Backlight Assemblies | Component Specifications

Product Specifications

Technical details and manufacturing context for LED Light Bar

Definition

The LED Light Bar is a critical component within the Backlight Assembly, providing uniform illumination for displays. It consists of multiple LEDs arranged in a linear configuration on a PCB, which is then integrated into the assembly structure. This component directly determines the brightness, color temperature, and energy efficiency of the backlight system. The LED Light Bar is available in custom lengths ranging from 300 to 3000 mm, with widths typically between 8 and 15 mm depending on the LED package size. The LED count can vary from 30 to 300 per meter, with higher counts increasing brightness. Color temperature options span from warm to cool white (2700–6500 K), and luminous flux ranges from 500 to 1500 lm/m, depending on LED efficiency. The bar operates at a constant voltage of 12–24 V DC, with power consumption between 8 and 20 W/m, affecting heat generation. The Color Rendering Index (CRI) ranges from 80 to 95 Ra, with higher values for accurate color reproduction. Operating temperature is -20 to 60 °C, with derating above 50 °C. Ingress protection ratings from IP20 to IP67 are available, with IP67 suitable for outdoor use. PCB material can be FR-4 or aluminum, with aluminum offering better heat dissipation. Weight ranges from 50 to 200 g/m, depending on PCB thickness. Materials used include LED chips, PCB, solder, and encapsulation resin. This component is essential for display backlighting, and its performance directly impacts the overall display quality. When selecting an LED Light Bar, it is crucial to verify model-specific values and standards with the legal manufacturer or supplier, as the directory provides reference ranges only.

Working Principle

When electrical current is applied to the LEDs through the PCB circuitry, the semiconductor materials within each LED emit photons (light) through electroluminescence. The light is then diffused and directed by other components in the backlight assembly to create uniform illumination across the display surface. The PCB provides mechanical support and electrical connections, while solder ensures reliable contacts. Encapsulation resin protects the LED chips and circuitry from environmental factors. The linear arrangement of LEDs ensures even light distribution along the bar, and the choice of PCB material (FR-4 or aluminum) influences thermal management, which is critical for maintaining performance and longevity. The operating principle is based on the conversion of electrical energy into light, with efficiency determined by the LED's semiconductor properties and the design of the PCB circuitry.

Common Materials

LED chips, Printed Circuit Board (PCB), Solder, Encapsulation resin

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	300–3000 mm	Custom lengths available
Width	8–15 mm	Depends on LED package size
LED Count	30–300 pcs/m	Higher count increases brightness
Color Temperature	2700–6500 K	Warm to cool white
Luminous Flux	500–1500 lm/m	Depends on LED efficiency
Input Voltage	12–24 V DC	Constant voltage operation
Power Consumption	8–20 W/m	Affects heat generation
Color Rendering Index	80–95 Ra	Higher CRI for accurate colors
Operating Temperature	-20–60 °C	Derate above 50°C
Ingress Protection	IP20–IP67	IP67 for outdoor useIEC 60529
PCB Material	FR-4 or Aluminum	Aluminum for better heat dissipation
Weight	50–200 g/m	Depends on PCB thickness

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 Chip Part
Primary light-emitting element that converts electrical energy to visible light

Material: Semiconductor materials (gallium arsenide, gallium phosphide, etc.)
PCB Substrate Part
Provides structural support and electrical connections for the LED chips

Material: FR-4 fiberglass or aluminum
Solder Points Part
Electrical and mechanical connection between LED chips and PCB

Material: Tin-lead or lead-free solder alloy
Encapsulation Layer Part
Protects LED chips from environmental factors and helps diffuse light

Material: Silicone or epoxy resin

Applied To / Applications

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

Backlight Assembly

View system integration details

Manufacturers of LED Light Bar

Manufacturer profiles associated with LED Light Bar.

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Frequently Asked Questions

What is the typical length range for an LED light bar?

The typical length range is 300 to 3000 mm, with custom lengths available. The exact length should be confirmed with the manufacturer for your specific application.

How does the color temperature affect the display?

Color temperature ranges from 2700 K (warm white) to 6500 K (cool white). It determines the perceived warmth or coolness of the light, which can affect the display's visual appearance and suitability for different environments.

What is the significance of the ingress protection (IP) rating?

The IP rating indicates the level of protection against dust and water. Ratings from IP20 to IP67 are available, with IP67 suitable for outdoor or harsh environments. Choose the rating based on the installation location.

Why is PCB material important?

PCB material affects thermal management and mechanical strength. Aluminum PCBs offer better heat dissipation, which is beneficial for high-power applications, while FR-4 is a common cost-effective option. The choice depends on the thermal requirements of your design.

Data Basis

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

Preliminary Technical Classification

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pressure:	Atmospheric (non-pressurized enclosure)
other spec:	Humidity: 5-95% RH non-condensing, Input Voltage: 12-24V DC, IP Rating: IP65/IP67 typical
temperature:	-40°C to +85°C (operating), -55°C to +100°C (storage)

LED Light Bar

Product Specifications

Applied To / Applications

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Application Fit & Sizing Matrix

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