IEC 61747-1-1:2014

Overview

IEC 61747-1-1:2014 is the generic specification developed by the International Electrotechnical Commission (IEC) for liquid crystal display (LCD) devices. This international standard establishes general procedures for testing and measuring the electrical and optical characteristics of LCD devices, along with rules for climatic, mechanical, and endurance tests. As the foundational part of the IEC 61747 series, it serves as a baseline for defining quality assessment, inspection, and standardization processes across the LCD industry.

This edition represents a technical revision, superseding the previous publication (IEC 61747-1:1998 and its amendment), and aligns industry practices with updated references, reorganized content, and clarified guidelines.

Key Topics

• Test Procedures: Describes standardized methods for evaluating both electrical and optical properties of LCD devices, ensuring consistent performance assessment throughout production.
• Quality Control: Specifies grouping and quality categories for inspection lots, detailing sampling procedures and inspection groups (A, B, C, D) to maintain uniform product quality.
• Climatic and Mechanical Testing: Outlines rules for subjecting devices to environmental, endurance, and mechanical stresses to verify durability and reliability in various operational conditions.
• Device Identification and Traceability: Ensures every device and its packaging are clearly marked with codes for proper traceability, aiding efficient lot management and product recall capabilities.
• Quality Assessment and Sampling: Incorporates acceptance quality levels (AQL), lot tolerance percentage defective (LTPD) plans, and rigorous statistical sampling for both lot-by-lot and periodic inspections.
• Classification of Defects: Lays out guidelines for visual, mechanical, and functional defect classification, and provides requirements for corrective actions and lot re-submission if failures occur.
• Documentation and Conformity: Addresses the systematic recording of inspection results, supporting transparent conformity assessment in line with IEC practices.

Applications

The guidance and requirements from IEC 61747-1-1:2014 are widely applied across various sectors involved in the manufacturing, testing, and supply of LCD devices, including:

• Display Manufacturers: Used as a crucial quality assurance tool for ensuring product uniformity, performance, and compliance with global regulations in LCD screens for consumer electronics, automotive displays, medical panels, and more.
• Testing Laboratories: Serves as a procedural benchmark for third-party labs performing conformance and endurance tests, supporting international trade and certification schemes.
• Component Suppliers: Provides clear inspection and traceability rules for suppliers of LCD subassemblies or modules, enabling integration into complex systems.
• OEMs and Integrators: Helps equipment manufacturers and system integrators specify and verify LCD components that meet standardized criteria, reducing supply chain risk.
• Regulatory Bodies & Certification Authorities: Acts as a reference for conformity assessment, product certification, and market acceptance of LCD technologies worldwide.

Related Standards

IEC 61747-1-1:2014 is part of a broader set of international standards that support the lifecycle of LCD devices. Key related standards include:

• IEC 61747-1-2: Liquid crystal display devices - Terminology and letter symbols.
• IEC 60410 & ISO 2859: Sampling plans for inspection by attributes.
• IEC 60747 Series: Semiconductor devices - Discrete devices and integrated circuits.
• IEC 60749: Semiconductor devices - Mechanical and climatic test methods.
• IEC 61747-5, 10-1, 10-2: Methods for environmental, endurance, and mechanical testing of display devices.
• IEC 61747-20: Visual inspection methods for LCD devices.
• IEC 61747-30-1: Measuring methods for transmissive type LCD modules.

By adhering to IEC 61747-1-1:2014 and these related standards, stakeholders ensure robust, reliable, and interoperable LCD products suitable for demanding global markets.