IEC 62679-3-2:2013

Overview

IEC 62679-3-2:2013 specifies standardized electro-optical measuring methods for electronic paper display (EPD) modules, encompassing both monochromatic and color types using segment, passive, or active matrix technologies. Developed by the International Electrotechnical Commission (IEC), this standard promotes uniform, reliable measurement and reporting of key performance parameters in electronic paper displays to enhance comparability and transparency throughout the display industry.

The document details procedure-dependent parameters, prescribes the methods and test conditions for their measurement, and standardizes the evaluation of critical optical and electrical properties. This ensures that results are meaningful, reproducible, and appropriate for integration into product specifications, quality testing, or research.

Key Topics

• Electro-optical Performance Measurement:

  • Defines how to measure luminance, contrast, response time, frame response, and image retention in EPD modules.
  • Outlines proper use of light measuring devices (LMD), such as spectro-radiometers or photometers with V(λ) correction.

• Standard Measurement Locations:

  • Establishes standardized positions on display surfaces (matrix and segment displays) for consistent, repeatable optical measurements.

• Operating and Measuring Conditions:

  • Specifies standard conditions for device operation, including environmental stability, driving signals, and illumination, to ensure accurate measurement.

• Response and Frame Time Testing:

  • Details procedures for measuring the time taken for the display to transition between different optical states, capturing both module and panel response characteristics.

• Electrical Energy Assessment:

  • Introduces methods for measuring the electric energy required for rewriting display content and for maintaining image contrast.

• Image Retention Duration:

  • Defines how to measure and report how long an image persists at a readable level on an EPD module after the driving signal is removed.

Applications

This standard is essential for a wide range of professionals and industries that develop, evaluate, or utilize electronic paper displays, including:

• Display Manufacturers:

  • Use standardized procedures to benchmark and improve product performance, leading to more reliable and competitive EPD technologies.

• Component Suppliers:

  • Assess sub-module performance within electronic paper display assemblies.

• Quality Assurance & Testing Labs:

  • Conduct repeatable, recognized tests on EPD modules for validation, certification, or R&D purposes.

• Product Integrators (e-readers, signage, instruments):

  • Evaluate displays for optimal contrast, response time, and energy consumption, ensuring compliance with performance requirements.

By utilizing IEC 62679-3-2:2013, organizations ensure a common language and approach to EPD measurement, fostering trust across the global supply chain.

Related Standards

For comprehensive testing and evaluation, IEC 62679-3-2 should be considered in conjunction with other international standards and references, including:

• IEC 62679 series:

  • Additional parts of the series cover other EPD aspects, such as environmental and durability testing.

• CIE/ISO 10527:

  • Defines photopic response functions (V(λ)), essential for optical measurements.

• IEC 62679-3-1:

  • Planned to specify illumination and general optical measurement methodology for EPD modules.

• General IEC display standards:

  • For broader electronic display performance requirements and test methods.

Keywords

Electronic paper display, electro-optical measurement, display standards, IEC 62679-3-2, EPD modules, segment display, matrix display, display performance, luminance measurement, contrast ratio, image retention, response time, electronic display benchmarking, display energy consumption.