LED Light Bar and COB LED Measurement System by ZOLIX

Overview

The LED Light Bar and COB LED Measurement System by ZOLIX is a dedicated optical metrology platform engineered for photometric and radiometric characterization of planar and high-density LED light sources. Designed for integration into production line quality control and R&D validation workflows, the system operates on the principle of calibrated spectral radiance measurement using a high-stability reference detector traceable to NIST-traceable standards. It employs a precisely aligned integrating sphere–spectroradiometer configuration with auxiliary stabilization lighting to minimize ambient drift and thermal-induced signal variance. The architecture supports both absolute luminous flux (lm), chromaticity coordinates (CIE 1931 x,y), correlated color temperature (CCT), color rendering index (CRI), and spectral power distribution (SPD) acquisition — all compliant with CIE Publication No. 127, IES LM-79-19, and ISO/CIE 11664 series standards.

Key Features

• NIST-traceable calibration path maintained through annual recalibration certificates issued by accredited third-party laboratories (e.g., CNAS-accredited labs in China)
• Integrated auxiliary stabilization lamp system to suppress measurement drift caused by ambient light fluctuations or thermal transients during extended batch testing
• Modular optical head design accommodating variable source geometries: optimized for linear light bars (up to 1200 mm length), Chip-on-Board (COB) modules (≥5 mm × 5 mm active area), and high-power flash LEDs (pulse width ≥10 µs)
• Motorized sample positioning stage with programmable X-Y-Z translation and tilt adjustment (±2° resolution) for repeatable alignment under standardized IESNA viewing angles
• Robust mechanical housing with EMI-shielded enclosure and thermally stabilized optical bench (±0.1°C internal temperature control) to ensure long-term photometric reproducibility (RSD ≤0.8% over 8-hour continuous operation)
• Compliance-ready firmware supporting audit trails, user access levels (admin/operator), and electronic signature capability per FDA 21 CFR Part 11 requirements

Sample Compatibility & Compliance

This system is validated for use with flat-panel display backlight units (BLUs) based on edge-lit or direct-lit LED light bars; COB packages used in architectural and industrial lighting; high-intensity flash modules employed in machine vision and automotive signaling; and general-purpose LED bulbs meeting IEC 62504 and GB/T 24824–2009 specifications. All measurement protocols align with international photometric test standards including IES LM-79-19 (Electrical and Photometric Measurements of Solid-State Lighting Products), CIE S 025/E:2015 (Test Method for LED Lamps, LED Luminaires and LED Modules), and ISO/CIE 11664-1:2019 (Colorimetry – Part 1: CIE Standard Colorimetric Observers). Data outputs are structured to support GLP/GMP documentation workflows and factory acceptance testing (FAT) reporting.

Software & Data Management

ZOLIX LED-Measure Suite v3.2 provides full instrument control, real-time spectral visualization, and automated report generation in PDF and CSV formats. The software implements dual-mode acquisition: continuous integration for steady-state sources and gated sampling for pulsed emitters. All raw spectra are stored with metadata including date/time stamp, operator ID, calibration certificate ID, ambient temperature/humidity, and instrument configuration parameters. Built-in statistical analysis tools compute mean chromaticity deviation (Δu’v’), CCT shift vs. drive current, and CRI subcomponents (R1–R15). Audit logs record every parameter change, file export, and calibration event — fully exportable for regulatory review. Optional API integration enables direct data ingestion into MES (Manufacturing Execution Systems) and LIMS platforms via RESTful endpoints.

Applications

• Photometric verification of LED light bars used in LCD/Mini-LED display backlights, ensuring uniformity across viewing angles and luminance stability under varying DC bias conditions
• Batch-level chromaticity binning and lifetime prediction of COB modules through accelerated aging correlation with SPD degradation metrics
• Flash LED pulse fidelity assessment — including rise/fall time, peak irradiance consistency, and spectral stability across >10⁵ trigger cycles
• QC release testing for LED retrofit lamps and integrated luminaires per ENERGY STAR SSL V2.1 and DLC QPL requirements
• Development-stage validation of phosphor-converted white LEDs where precise CCT and R9 values determine market compliance for retail and healthcare lighting

FAQ

Is NIST traceability provided with each unit shipment?
Yes — each system ships with an initial calibration certificate referencing NIST SRM 2020 or equivalent national standard, accompanied by uncertainty budgets at 95% confidence level.
Can the system measure pulsed LED sources?
Yes — the spectroradiometer supports gated integration down to 10 µs exposure windows synchronized with external TTL triggers.
What is the minimum measurable luminous flux?
The system achieves reliable detection down to 0.1 lm for narrow-band monochromatic sources and 1.0 lm for broadband white LEDs under standard 2π geometry.
Does the software support multi-user environments with role-based permissions?
Yes — administrator, technician, and viewer roles are enforced with password protection and session timeout policies.
Is remote diagnostics and firmware update supported?
Yes — secure SSH-enabled remote maintenance is available with prior customer authorization and network isolation protocols.