Overview
IEC 62595-1-2:2024 is an international standard published by the International Electrotechnical Commission (IEC). Titled Display lighting unit – Part 1-2: Terminology and letter symbols, this standard establishes preferred terms, definitions, and letter symbols for display lighting units. These include backlight units (BLUs) in transmissive and transflective displays, as well as frontlight units (FLUs) in reflective displays. The primary aim is to ensure uniform, consistent terminology and symbol usage in technical publications, facilitating clear communication and standardization across the global display technology industry.
Key Topics
This standard provides a comprehensive classification of terminology for display lighting units, including:
- Fundamental terms for display lighting units: Definitions for backlight units, frontlight units, edge-lit and direct-lit BLUs, dynamic and static BLUs, and multi-primary light sources.
- Terms related to passive optical components: Standardized names and definitions for light-guide plates (LGPs), light-guide films (LGFs), diffusers, prism films, reflector films, and micro-structured optical elements used in display lighting.
- Terms regarding spatio-temporal modulation: Concepts such as local dimming, block and segment structures, dimming blocks, boosting blocks, and support elements like bezels and housings.
- Descriptions for solid-state light sources: Terminology for LED, OLED, and laser-based light sources, including RGB LEDs and multi-chromatic units.
- Letter symbols: IEC 62595-1-2:2024 also assigns standardized symbols for key quantities and units used in technical and engineering documents related to display lighting.
The document is structured to support easy reference and correct categorization of terms, helping manufacturers, designers, and engineers use consistent language across the display lighting industry.
Applications
IEC 62595-1-2:2024 is crucial in several practical contexts:
- Engineering Design and Product Development: Facilitates uniform documentation and communication when developing display lighting units for LCDs, OLEDs, electronic paper, and other non-emissive displays.
- Technical Publications and Standards Compliance: Ensures that technical datasheets, white papers, and engineering specifications use harmonized terminology, aiding in clearer understanding and implementation.
- Manufacturing and Quality Control: Supports manufacturers and quality control teams in ensuring products meet global expectations by using agreed-upon terminology for display lighting components.
- Cross-Sector Collaboration: Enables collaboration and knowledge sharing between international partners, suppliers, and customers by minimizing misunderstandings related to terminology and symbols.
- Education and Training: A valuable resource for instructional materials in engineering curricula, helping students learn standardized definitions and symbols relevant to modern display technologies.
Related Standards
For effective application and to ensure interoperability, IEC 62595-1-2:2024 should be referenced alongside several related standards:
- IEC 60050-845 – International Electrotechnical Vocabulary (IEV): Lighting: The foundational vocabulary resource for all lighting-related terms, widely used across electrical and electronic standards.
- IEC 62595 Series – Display Lighting Unit Standards: Other parts in this series cover measurement methods, safety, performance, and additional technical details for display backlight and frontlight units.
- IEC/ISO Standards for Electronic Displays: Collaboration with ISO standards ensures broader compatibility, especially for LCD, OLED, and electronic paper technologies.
Using IEC 62595-1-2:2024 ensures that organizations across the display technology supply chain adhere to internationally recognized terminology and symbols, promoting clarity, quality, and interoperability in the development and use of advanced display lighting solutions.