Konica Minolta ProMetric Y Imaging Photometer for LCD, LED Backlight, and OLED Display Testing

Overview

The Konica Minolta ProMetric Y is a high-resolution scientific imaging photometer engineered for quantitative luminance and spatial uniformity characterization of self-emissive and transmissive flat-panel displays—including LCDs with LED backlights, microLED arrays, and OLED modules. Operating on the principles of calibrated CCD-based photometry, the system captures full-field luminance (cd/m²) and chromaticity (CIE x,y or u’v’) distributions in a single exposure, enabling pixel-level photometric analysis without mechanical scanning. Its optical architecture integrates a telecentric lens system, thermally stabilized silicon photodiode-based sensor calibration traceable to NIST standards, and an f/2.8 aperture optimized for low-light sensitivity and minimal vignetting across wide field-of-view configurations. Designed explicitly for integration into R&D labs and high-throughput production test environments, the ProMetric Y delivers sub-1% photometric repeatability (k=2) under controlled ambient conditions—meeting foundational requirements for display qualification per IEC 62341-6-3 (OLED), ISO 9241-307 (display ergonomics), and ASTM E308 (colorimetric computation).

Key Features

• High-dynamic-range (HDR) monochrome CMOS sensor with 16-bit digitization and programmable exposure control (10 µs to 60 s), supporting luminance measurements from 0.001 cd/m² to 10⁶ cd/m²
• Interchangeable lens options (24 mm, 35 mm, 50 mm, 100 mm) with motorized focus and aperture control, enabling field-of-view adaptation from small-area keyboard zones to full-size 85″ UHD panels
• Integrated thermal stabilization subsystem maintaining sensor temperature within ±0.5°C over 8-hour continuous operation—critical for long-term photometric stability
• Hardware-accelerated real-time defect detection engine compatible with TrueTest™ software, executing >12 simultaneous Mura classification algorithms (e.g., butterfly, edge leakage, random Mura) at frame rates up to 30 Hz
• Ruggedized aluminum alloy chassis rated IP52 for dust resistance and vibration tolerance (5–500 Hz, 0.15 mm peak displacement), validated for factory-floor deployment
• Native support for USB 3.2 Gen 2 and GigE Vision interfaces, enabling deterministic image transfer latency (<15 ms) and synchronization with external triggers (TTL/RS-422)

Sample Compatibility & Compliance

The ProMetric Y accommodates planar and gently curved emissive surfaces with radii ≥300 mm. It is routinely deployed for evaluation of TFT-LCD modules with edge-lit or direct-lit LED backlights, rigid and flexible OLED panels (including foldable prototypes), automotive instrument clusters, and consumer electronics keypads. Measurement protocols align with industry-standard test methods including ISO 13406-2 (visual ergonomics), VESA DisplayHDR™ certification workflows, and internal OEM specifications for luminance uniformity (ΔL/L 1000:1), and Mura severity grading (per JIS Z 8401). Data integrity complies with FDA 21 CFR Part 11 requirements when used with TrueTest’s electronic signature, audit trail, and role-based access control modules.

Software & Data Management

TrueTest™ Automated Optical Inspection Software serves as the primary analysis platform, providing configurable pass/fail criteria, statistical process control (SPC) charting, and automated report generation (PDF/CSV/XML). TrueMura™ extension enables AI-assisted Mura classification trained on >50,000 labeled defect instances across 12 Mura morphologies. All raw image data (.tif/.raw) and metadata (exposure time, lens ID, calibration timestamp, operator ID) are stored with SHA-256 hashing for forensic traceability. Software validation documentation (IQ/OQ/PQ protocols) and 21 CFR Part 11 compliance packages are available upon request for regulated manufacturing environments.

Applications

• FPD manufacturing: Pixel-level luminance mapping, dead/stuck pixel detection, backlight clouding quantification, and grayscale inversion analysis
• Automotive HMI validation: Instrument cluster readability under simulated daylight (10,000 lux) and night-driving (0.1 cd/m²) conditions
• Medical display QA: Verification of DICOM GSDF compliance through luminance step-table measurements
• AR/VR microdisplay screening: Contrast uniformity assessment across curved waveguide exit pupils
• Keyboard and membrane switch testing: Character legibility, inter-character brightness deviation (<±3%), and edge glow quantification
• Light guide plate (LGP) evaluation: Hotspot detection, speckle pattern analysis, and side-emission homogeneity scoring

FAQ

What calibration standards does the ProMetric Y reference?
The system is factory-calibrated against NIST-traceable standard luminance sources and includes annual recalibration services with documented uncertainty budgets per ISO/IEC 17025.
Can it measure chromaticity alongside luminance?
Yes—when equipped with the optional ProMetric Y-CCD+ configuration featuring integrated CIE 1931 color-matching filters and dual-sensor spectral correction, enabling concurrent xyY output with Δu’v’ < 0.002 repeatability.
Is remote operation supported for cleanroom integration?
All control functions operate via TCP/IP commands (ASCII protocol) or GenICam-compliant API; no local GUI required—enabling full headless operation behind Class 1000 cleanroom walls.
How is Mura severity objectively quantified?
TrueMura uses spatial frequency-weighted RMS deviation from ideal uniformity, normalized to display size and viewing angle, generating a unitless Mura Index (MI) score aligned with JIS B 7152-2019 Annex B guidelines.
Does the system support automated focus calibration for curved displays?
Yes—the optional AutoFocus Pro module performs multi-point z-height profiling using laser triangulation feedback, updating lens focus maps in real time during stage translation.