PD IEC TR 62977-5-2-2021 PDF

Full title and description

Electronic displays - Part 5-2: Visual assessment - Colour discrimination according to viewing direction. This IEC Technical Report specifies a visual assessment method using special test patterns to evaluate how colour discrimination, image structure and luminance are perceived when viewing direction changes for electronic display devices.

Abstract

This Technical Report describes procedures for a structured visual assessment of viewing-direction characteristics of display devices. It defines test pattern construction, test-room and device setup, observer instructions and result presentation; it also shows experimental results demonstrating the method's effectiveness while noting that physical measurements remain necessary to confirm quantitative performance specifications. The report includes informative annexes on fill-factor and luminance dependencies and on a pattern generator.

General information

• Status: Technical Report (published / definitive).
• Publication date: 11 March 2021 (IEC publication).
• Publisher: International Electrotechnical Commission (IEC), TC 110.
• ICS / categories: 31.120 (Electronic display devices).
• Edition / version: Edition 1.0 (2021).
• Number of pages: 35 pages (main IEC publication).

Scope

The report provides a visual assessment method for the viewing-direction dependence of colour discrimination and related perceived image attributes in electronic displays. It covers test pattern geometry and colour assignment, test-room and measurement geometry, observer selection and instructions, repeatability considerations, and methods for presenting and interpreting experimental assessment results. The method is intended as a practical tool for identifying image-quality issues associated with viewing direction while recognising that objective physical measurements are needed to confirm device performance.

Key topics and requirements

• Definition of viewing-direction coordinate system and standard measuring equipment for visual assessment.
• Construction and colour assignment of specialised test patterns for colour-discrimination tasks.
• Test-room conditions, device drive/setup parameters and observer-selection criteria.
• Procedure for conducting visual assessments, instructions to observers, and repeatability checks.
• Presentation formats and interpretation guidelines for experimental results, including statistical plots and colour-difference analyses (e.g., S‑CIELAB comparisons and correlations with physical measures).
• Informative annexes addressing fill-factor dependency, luminance dependency and pattern-generator implementation.

Typical use and users

This report is used by display engineers, quality and test laboratories, R&D teams, colour scientists and manufacturers to design and run visual experiments that detect viewing-direction related image-quality issues. It is also useful for standards committees and test-house personnel who develop or validate subjective test protocols for display evaluation.

Related standards

IEC TR 62977-5-2 is part of the IEC 62977 series on electronic displays; related items in the series include generic measurement and practical guidance documents (for example parts in the 1‑xx and 2‑xx families) and evaluation parts in the 3‑xx family that cover optical performance and colour capability measurements. Users often apply this TR alongside the measurement-oriented parts of IEC 62977 (e.g., parts addressing fundamental optical measurements, ambient performance and colour-evaluation methods).

Keywords

electronic displays, visual assessment, colour discrimination, viewing direction, test patterns, luminance, S‑CIELAB, TC 110, subjective evaluation, display QA.

FAQ

Q: What is this standard?

A: It is an IEC Technical Report (IEC TR 62977-5-2:2021) that specifies a structured visual-assessment method for evaluating colour discrimination and related perceived image changes as viewing direction varies for electronic displays.

Q: What does it cover?

A: It covers test-pattern design, viewing-direction geometry, test-room and device setup, observer selection and instructions, assessment procedures, repeatability considerations and guidance for presenting and interpreting experimental results; informative annexes give additional details on fill-factor and luminance dependencies.

Q: Who typically uses it?

A: Display manufacturers, test and quality laboratories, R&D and colour-science teams, and standards developers use the report to design subjective tests and to interpret viewing-direction related image-quality effects.

Q: Is it current or superseded?

A: The document was published in March 2021 (Edition 1.0) and is published as a Technical Report; the IEC record indicates a stability period (stability date) aligned with the IEC publication details (2021). Users should check for later amendments or newer related parts in the IEC 62977 series before relying on it for long-term compliance.

Q: Is it part of a series?

A: Yes — IEC TR 62977-5-2 belongs to the IEC 62977 family of documents addressing electronic-display measurement and evaluation; other parts in the series cover fundamental optical measurements, ambient performance, and optical-evaluation methods.

Q: What are the key keywords?

A: electronic displays, visual assessment, colour discrimination, viewing direction, test patterns, luminance, subjective testing, display evaluation.