IEC 61747-5-2-2011 PDF

Full title and description

Liquid crystal display devices - Part 5-2: Environmental, endurance and mechanical test methods - Visual inspection of active matrix colour liquid crystal display modules. This international standard defines quality-assessment procedures, defect definitions and the method for human-eye visual inspection of the active area of transmissive-type active-matrix colour LCD modules (mura was explicitly excluded in this edition).

Abstract

IEC 61747-5-2:2011 specifies general rules and procedures for visual inspection of active-matrix colour liquid crystal display modules, including defect definitions, recommended inspection conditions and reporting practices. It was published as a first edition in 2011 and later replaced by IEC 61747-20-3:2016 which updates numbering and technical content. The standard is intended to be used together with customer-specific acceptance criteria.

General information

• Status: Replaced / withdrawn (replaced by IEC 61747-20-3:2016).
• Publication date: 16 June 2011 (first edition).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 31.120 (Electronic display devices).
• Edition / version: Edition 1.0 (2011).
• Number of pages: 29 pages (IEC published PDF length).

Key bibliographic details above are based on the IEC product record for this publication and related library records.

Scope

This part of IEC 61747 applies to subjective (human-eye) visual inspection of the active area of transmissive active-matrix colour LCD modules. It gives quality-assessment procedures, defines defect types (for example subpixel, line, surface and contamination defects), and describes inspection methods, conditions and record-keeping. The standard notes that mura was not specified in this edition and that final defect limits (types, numbers and sizes) are to be agreed in customer acceptance specifications.

Key topics and requirements

• Definitions and classification of visual defects (subpixel bright/dark/intermediate, line defects, scratches, foreign material, bubbles, light leakage, etc.).
• Standardized inspection conditions and setup (illumination, viewing distance, electrical drive conditions and module mounting to ensure repeatable inspections).
• Inspection procedures and use of limit/reference samples for pass/fail assessment.
• Sampling and reporting practices; requirement that final acceptance limits be specified in customer/supplier quality contracts.
• Exclusion note: mura (non-uniformity phenomena) was excluded from the 2011 edition and handled separately in later work.

These topics summarize the technical content and principal requirements of the 2011 edition.

Typical use and users

Used by LCD module manufacturers, display-module incoming-inspection teams, set makers, quality-control engineers, test laboratories and procurement/specification engineers to define and perform visual inspection and acceptance testing of active-matrix colour LCD modules. It is typically paired with customer-specific acceptance tables (AQLs or incoming inspection specifications).

Related standards

Part of the IEC 61747 series for liquid crystal display devices. The 2011 Part 5-2 edition was superseded by IEC 61747-20-3:2016 (Visual inspection - Active matrix colour liquid crystal display modules). Other related parts of the series (e.g., module sectional specifications and other test-method parts) are commonly referenced together when specifying display quality and test sequences.

Keywords

liquid crystal display; active matrix; colour LCD; visual inspection; defect classification; quality assessment; inspection conditions; mura (excluded); display modules; IEC 61747.

FAQ

Q: What is this standard?

A: IEC 61747-5-2:2011 is an international standard that provided rules and procedures for human-eye visual inspection of active-matrix colour LCD modules (environmental, endurance and mechanical test methods: visual inspection).

Q: What does it cover?

A: It covers defect definitions, recommended inspection conditions (illumination, viewing distance, electrical drive), inspection procedures including use of limit samples, and reporting practices. The edition noted that mura was not specified within this part and that acceptance limits are to be set by customer agreement.

Q: Who typically uses it?

A: Manufacturers of LCD modules, quality-control and incoming-inspection teams at panel and set makers, independent test laboratories, and procurement/specification engineers who need standardized visual inspection methods.

Q: Is it current or superseded?

A: Superseded — IEC 61747-5-2:2011 was replaced by IEC 61747-20-3:2016, which constitutes a technical revision and aligns numbering within the IEC 61747 series. Users should reference the 2016 part for the current visual-inspection requirements.

Q: Is it part of a series?

A: Yes — it belongs to the IEC 61747 family (Liquid crystal display devices) and is intended to be used alongside other parts of the series (module sectional specs, test-method parts and related technical reports). The 2016 replacement reclassified this content under Part 20-3 to align with series numbering.

Q: What are the key keywords?

A: Visual inspection, defect classification, active-matrix colour LCD, inspection conditions, quality assessment, acceptance criteria, display modules, IEC 61747.