IEC 61747-3:2015

Overview

IEC 61747-3:2015 is the sectional IEC standard for segment-type monochrome liquid crystal display (LCD) cells. It specifies the quality assessment framework, inspection and screening sequences, sampling requirements, and the test and measurement procedures needed to assess LCD cells. This part is intended to be read in conjunction with IEC 61747-1-1:2014 (generic specification) and is one part of the broader IEC 61747 series for liquid crystal display devices.

Key edition notes:

• Edition 3.0 (2015) updated normative references and removed references to IECQ/QC per ISO/IEC Directives.
• Allows use of a capability approval procedure as an alternative to the qualification approval procedure for products manufactured in a defined process.

Key Topics

• Scope and applicability: Targets segment-type monochrome LCD cells rather than matrix or color modules.
• Quality assessment procedures: Defines primary manufacturing stages and the structure for assessing quality across production lines.
• Production process breakdown: Describes distinct manufacturing stages including electrode patterning, alignment treatment, assembly, liquid crystal filling, finishing and inspection.
• Inspection and screening: Specifies screening sequences and screening test items (see standard for test conditions and limits).
• Sampling and lot control: Provides fixed sampling sizes and sampling plans for lot-by-lot and periodic tests (Group A–D classifications).
• Structural similarity procedures: Rules that permit reduced testing when products are demonstrably structurally similar.
• Subcontracting controls: Requirements for oversight, documentation and acceptance testing when processes or tests are subcontracted.
• Test and measurement procedures: References IEC 61747-10 series for environmental, mechanical and endurance test methods; detailed test procedures are included or referenced.

Applications

IEC 61747-3:2015 is used by:

• LCD manufacturers for product development, internal quality control and formal approval of production lines.
• Quality engineers and test laboratories implementing sampling plans, screening and conformance tests.
• Procurement and supply-chain managers to define acceptance criteria and supplier audit requirements.
• Contract manufacturers and subcontractors to comply with documentation, transfer and acceptance test obligations.
• Compliance officers and certification bodies verifying that monochrome segment LCD cells meet agreed assessment and production controls.

Practical benefits:

• Enables consistent acceptance testing and lot release procedures.
• Supports risk reduction through defined screening and sampling.
• Reduces redundant testing via structural similarity and capability approval paths.

Related standards

• IEC 61747-1-1:2014 - Liquid crystal display devices - Generic specification (to be read with this part)
• IEC 61747-10-1 - Mechanical test methods
• IEC 61747-10-2 - Environmental and endurance test methods
• Other parts of the IEC 61747 series for different LCD device types and test methods.

Keywords: IEC 61747-3:2015, LCD cells, segment type monochrome, quality assessment, screening sequences, sampling requirements, test procedures, IEC standard.