Light Emitting Diode (LED) Array: Beam Angle 15° - 120°

Component Specifications

Definition

An LED array is an integrated electronic component consisting of multiple individual Light Emitting Diodes (LEDs) mounted on a common substrate or within a single package. In industrial contexts, particularly within Light Source Modules, these arrays are engineered to provide high-intensity, uniform, or patterned illumination for machine vision, inspection systems, process lighting, and status indication. They are characterized by their electrical configuration (series, parallel, or matrix), optical output (luminous flux, color temperature, beam angle), and thermal management design.

Working Principle

The LED array operates on the principle of electroluminescence in semiconductor materials. When a forward voltage is applied across the p-n junction of each diode, electrons recombine with electron holes, releasing energy in the form of photons. The array's driver circuit regulates current to the individual or grouped LEDs, controlling brightness and preventing thermal runaway. The spatial arrangement and optical elements (like lenses or diffusers) determine the light distribution pattern.

Materials

LED chips: Typically Gallium Arsenide (GaAs), Gallium Phosphide (GaP), or Indium Gallium Nitride (InGaN) semiconductors for specific wavelengths. Substrate: Aluminum, ceramic (e.g., Al2O3), or metal-core printed circuit board (MCPCB) for thermal conductivity. Encapsulation: Epoxy resin or silicone for protection and optical shaping. Bonding wires: Gold or aluminum. Phosphor coatings (for white LEDs): Yttrium Aluminum Garnet (YAG).

Technical Parameters

Parameter	Typical range	Notes & selection driver
IP Rating	IP65 - IP68 (for sealed arrays)
Beam Angle	15° - 120°
Luminous Flux	50 - 10,000 lumens (total array output)
Color Temperature	2700K - 6500K (for white LEDs)
Dominant Wavelength	385nm (UV) to 940nm (IR) for monochromatic
Forward Current (If)	20mA - 1500mA (depending on power rating)
Forward Voltage (Vf)	2.0V - 3.6V per LED (typical)
Operating Temperature	-40°C to +85°C
CRI (Color Rendering Index)	70 - 95 (for white LEDs)

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

Standards

ISO 23551-7, DIN EN 62471, IEC 60825-1

Parent Products

This component is used in the following industrial products

Light Source Module

A modular component that provides controlled illumination for optical scanning systems.

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Engineering Analysis

Risks & Mitigation

Thermal runaway leading to premature failure
Electrostatic discharge (ESD) damage during handling
Incompatible driver causing overcurrent
Moisture ingress in non-sealed environments
Color consistency variation between batches

FMEA Triads

Trigger: Insufficient heat sinking or poor thermal interface material
Failure: Overheating, accelerated lumen depreciation, and catastrophic LED junction failure
Mitigation: Design with adequate heatsinks, use thermal pads/compound, implement temperature sensors with feedback to driver, and follow thermal derating curves.

Trigger: Voltage spikes or incorrect polarity from power supply
Failure: Instantaneous overcurrent, damaging LED chips or bond wires
Mitigation: Incorporate reverse polarity protection, transient voltage suppressors (TVS), and constant current LED drivers with overvoltage protection.

Trigger: Mechanical vibration or shock in industrial environment
Failure: Cracked solder joints, detached LEDs, or broken internal connections
Mitigation: Use robust mounting (e.g., screws vs. adhesives), conformal coating, and perform vibration testing per IEC 60068-2-6.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Luminous flux: ±10% typical; Chromaticity coordinates: within 4-step MacAdam ellipse per ANSI C78.377; Forward voltage: ±0.2V per LED.

Test Method

Photometric testing per IESNA LM-79; Thermal testing via thermal imaging or thermocouples; Electrical testing with parameter analyzer; Environmental testing per IEC 60068 for temperature, humidity, and vibration.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Light Emitting Diode (LED) Array

Manufacturer profiles associated with Light Emitting Diode (LED) Array.

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Frequently Asked Questions

What is the main advantage of using an LED array over a single high-power LED?

LED arrays provide better thermal distribution, higher total luminous output, redundancy (if one LED fails, others may remain operational), and more uniform light distribution over a larger area, which is critical for machine vision and inspection applications.

How is the brightness of an LED array controlled?

Brightness is primarily controlled through Pulse Width Modulation (PWM) or constant current reduction via a dedicated LED driver circuit, which adjusts the duty cycle or current level to dim the array without shifting color temperature significantly.

What are common failure modes for industrial LED arrays?

Common failures include thermal degradation (from inadequate heat sinking), electrostatic discharge (ESD) damage, solder joint fatigue from thermal cycling, and phosphor degradation in white LEDs, leading to lumen depreciation or color shift.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Light Emitting Diode (LED) Array