IEC 61747-30-1:2012

Overview

IEC 61747-30-1:2012 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies the measuring methods for transmissive liquid crystal display (LCD) modules. This standard covers segment, passive, and active matrix LCD modules, including both achromatic and color types. It also includes the transmissive modes of transflective LCD modules when their backlights are activated. Importantly, this standard excludes LCD modules combined with touch-panels or front-light-units due to measurement inaccuracies; such components must be removed before measurement.

This standard assumes that integrated backlights provide illumination for all measurement procedures. In cases where LCD modules without integrated backlights are used, external backlights may be provided, and the measurement approaches generally remain applicable. The 2012 edition represents a technical revision of IEC 61747-6:2004, aligning its document structure with IEC 61747-6-2 and incorporating various technical and editorial updates. IEC 61747-30-1:2012 should be used in conjunction with IEC 61747-1:1998.

Key Topics

• Scope and Application: Focused on transmissive LCD modules, including segment, passive, and active matrix architectures.
• Measurement Geometry: Defines illumination and viewing-direction coordinate systems critical for accurate, reproducible measurements.
• Standard Equipment and Set-Up: Specifies the use of light measuring devices (LMDs), positioning, alignment, and standard measurement arrangements.
• Measurement Parameters:
  • Luminance and photometric evaluation
  • Contrast ratio analysis
  • Chromaticity and color reproduction with photoelectric/colorimetric methods
  • Viewing angle range testing for contrast, luminance, and chromaticity stability
  • Electro-optical transfer function measurements (both photometric and colorimetric)
  • Lateral variation assessments including luminance uniformity, cross-talk, mura, and image sticking
  • Reflectance from the active area surface
  • Spectral transmittance factor evaluations
  • Temporal variations including response time, flicker, and critical flicker frequency
  • Electrical characteristics such as power consumption and current measurements
  • Warm-up characteristics detailing device behavior on startup
• Standardized Conditions: Clearly defined environmental and operational parameters to ensure consistent and comparable measurement results.

Applications

IEC 61747-30-1:2012 is essential for manufacturers, testing laboratories, and quality assurance teams involved in the design, production, and validation of transmissive LCD modules. The standard provides:

• Reliable Measurement Protocols: To accurately assess critical optical and electrical performance metrics under consistent conditions, ensuring comparability between products and batches.
• Design Validation: Enables verification of contrast ratios, viewing angles, color fidelity, and response times to meet application-specific requirements, such as consumer electronics, automotive displays, and industrial equipment.
• Quality Control: Facilitates detection of defects like mura and image sticking, improving product reliability and customer satisfaction.
• Performance Benchmarking: Supports competitive analysis and compliance with contractual specifications through internationally recognized measurement methodologies.

By following IEC 61747-30-1:2012, organizations can ensure that transmissive LCD modules meet global quality and performance standards, optimizing usability and visual experience for end users.

Related Standards

• IEC 61747-1:1998: General requirements and definitions for liquid crystal display devices, to be read in conjunction with IEC 61747-30-1:2012.
• IEC 61747-6-2: Provides structural alignment for document consistency with IEC 61747-30-1.
• Other IEC 61747 Parts: Cover different types and aspects of liquid crystal display devices, including reflective and transflective types, electrical interfaces, and environmental testing methodologies.

Keywords: IEC 61747-30-1:2012, transmissive LCD modules, liquid crystal display measurement, luminance testing, contrast ratio, chromaticity, viewing angle, electro-optical transfer function, temporal variations, LCD quality standards, IEC liquid crystal display standards