IEC 62341-6-4:2017

Overview

IEC 62341-6-4:2017 defines standardized methods for measuring the optical performance related to the transparent properties of organic light emitting diode (OLED) display panels and modules. Issued by the International Electrotechnical Commission (IEC), this standard focuses on establishing consistent measurement conditions and techniques that ensure the precise evaluation of transparency, haze, reflectance, luminance, and color properties in transparent OLED displays. The document addresses testing under both darkroom and various illumination conditions, providing a comprehensive framework for manufacturers, laboratories, and quality assurance teams to assess transparent OLED performance reliably.

Key Topics

IEC 62341-6-4:2017 covers several essential aspects related to the optical measurement of transparent OLED displays:

• Standard Measurement Conditions: Defines the reference environmental conditions (temperature, humidity, and atmospheric pressure) and setup requirements for consistent results.
• Transparent Property Measurements: Details on measuring hemispherical transmittance, transmitted haze, directional transmittance, and purity.
• On-Screen Performance: Outlines methods for evaluating luminance, uniformity, chromaticity, contrast ratio, grayscale, gamma, color gamut, and directional optical characteristics under dark and ambient lighting.
• Reflectance Assessment: Explains how to measure both hemispherical and directional reflectance factors, ensuring comprehensive evaluation of light reflections in practical environments.
• Ambient and Illumination Impact: Describes the effect of various ambient light conditions on transparency and visual performance, along with the relevance of standard illuminants such as CIE D65.
• Reporting and Calibration: Emphasizes the importance of documenting measurement deviations, ensuring equipment calibration, and maintaining measurement repeatability for robust transparent OLED display evaluation.

Applications

The measurement methods defined in IEC 62341-6-4:2017 deliver practical value across a range of industries and applications where transparent OLED displays are used:

• Display Manufacturing: Ensures product consistency and quality by providing measurable benchmarks for transparency, color, and reflectance.
• Consumer Electronics: Applies to transparent screens in devices such as smartphones, tablets, AR/VR headsets, and automotive HUDs, where display clarity and transparency are critical.
• Quality Control & Compliance Testing: Enables labs to verify that OLED modules meet international standards, regulatory requirements, and customer specifications.
• Research & Development: Offers an objective basis for innovation in OLED display technology, supporting comparative analysis of new materials and display architectures.
• System Integration: Assists integrators in selecting OLED panels with certified transparent performance for applications in advertising, retail, architecture, and public information systems.

Related Standards

IEC 62341-6-4:2017 is part of the larger IEC 62341 series for OLED displays, and references several key international standards for terminology and measurement methods, including:

• IEC 62341-1-2: OLED displays - Terminology and letter symbols
• IEC 62341-6-1: OLED displays - Measuring methods of optical and electro-optical parameters
• IEC 62341-6-2: OLED displays - Measuring methods of visual quality and ambient performance
• ISO 9241-307: Ergonomics of human-system interaction - Analysis and compliance test methods for electronic visual displays
• ISO 11664-2: Colorimetry - CIE standard illuminants
• CIE 15-2004: Colorimetry

Manufacturers, test laboratories, and engineers involved in OLED display technology should use IEC 62341-6-4:2017 in conjunction with these related standards to ensure comprehensive compliance, optimal product performance, and international market acceptance.

Keywords: transparent OLED display measurement, optical performance testing, hemispherical transmittance, transmitted haze, reflectance factor, luminance uniformity, IEC 62341-6-4, colorimetry OLED, display standards.