IEC 61966-4:2000

Overview

IEC 61966-4:2000 is an international standard published by the International Electrotechnical Commission (IEC) focusing on multimedia systems and equipment, specifically addressing colour measurement and management for equipment utilizing transmissive-type liquid crystal display (LCD) panels. This standard establishes rigorous procedures and methodologies for measuring and assessing the colour reproduction characteristics of LCD-based devices used in multimedia applications, thereby ensuring reliable and reproducible results essential for effective colour management and benchmarking.

Key Topics

IEC 61966-4:2000 covers several key aspects vital for consistent colour performance in LCD displays:

• Test Signals: Specifies standard input signals required for testing colour reproduction on LCD panels, covering both analogue and digital RGB inputs.
• Measurement Conditions: Defines environmental and operational conditions under which measurements should be conducted to ensure consistency and repeatability.
• Measurement Methods: Details the correct utilization of measurement instruments such as spectroradiometers and colorimeters for assessing spectral and colorimetric properties.
• Performance Characteristics:
  • Spectral Characteristics and Intensity: Measurement of primary and white colour stimuli.
  • Basic Colorimetric Characteristics: Evaluation of colour coordinates and luminance.
  • Tone and Colour Tracking: Analysis of how the display renders gradients, greyscales, and tracks colour across input levels.
  • Inter-Channel Dependency: Examination of mutual influences between RGB channels.
  • Spatial Non-Uniformity: Assessment of colour and brightness uniformity across different parts of the LCD surface.
  • Temporal Instability: Short- and mid-term stability of colour and brightness output.
  • Viewing Angle Characteristics: Measurement of luminance and chromaticity variation with different viewing angles.
• Data Presentation: Provides report templates and forms for clear and standardized documentation of measurement results.

Applications

Adherence to IEC 61966-4:2000 delivers significant practical value across various sectors:

• Display Manufacturers: Enables objective characterization of LCD panel performance, supporting development, quality control, and marketing claims. Facilitates product comparison and improvement.
• Multimedia System Integrators: Ensures accurate colour reproduction when integrating LCDs into complex multimedia setups, such as broadcast studios, signage, medical imaging, and control rooms.
• Quality Assurance Labs: Allows for trustworthy benchmarking and certification of LCD devices in accordance with a recognized international standard.
• Procurement and Compliance: Assists purchasing professionals and regulatory authorities in specifying and verifying LCD performance requirements during acquisition or compliance audits.
• End-Users: Technically-aware end-users, such as professional photographers, designers, and video editors, benefit from more accurate and reliable display performance when utilizing products benchmarked against this standard.

Related Standards

IEC 61966-4:2000 is part of a broader family of standards addressing colour measurement and management in multimedia systems:

• IEC 61966-1: General principles for multimedia colour measurement and management.
• IEC 61966-2-1: Colour management - Default RGB colour space - sRGB.
• IEC 61966-3: Colour measurement and management for equipment using cathode ray tubes (CRTs).
• IEC 61966-5: Colour measurement for equipment using plasma display panels.
• IEC 61966-6, -7, -8, -9: Covering projectors, printers, scanners, and digital cameras.
• ISO 9241-8: Ergonomic requirements for office work with visual display terminals, including colour displays.
• CIE 15.2: Colorimetry fundamentals used in conjunction with display testing.

For organizations and professionals seeking uniform colour quality in multimedia applications, IEC 61966-4:2000 delivers a robust framework for measurement, comparison, and management of LCD display performance. By adopting this standard, stakeholders can ensure devices meet high expectations for visual consistency, aiding both development and procurement in a competitive marketplace.