Recently, VISTAR, one of Visionox's affiliated companies, led the proposal of the international standard titled Semiconductor devices – Part 5-17: Optoelectronic devices – Light emitting diode – Measuring methods of optoelectronic parameters of micro scale light emitting diode array under the International Electrotechnical Commission (IEC), which has passed the New Work Item Proposal (NP) voting. NP voting is a critical step for an international standard to transition from the proposal stage to the formal drafting stage. It is typically initiated by national member bodies, and then the International Organization for Standardization (ISO) organizes member countries to vote based on the principle of "one country with one vote".

This is the first international standard applied for and successfully approved in the Micro-LED field, as well as the first international standard led by China in the Micro-LED field, playing a milestone significance.

Industry development begins with standards.

This international standard defines the standardized measurement conditions and measuring methods for the optoelectronic parameters of Micro-LED arrays, addressing the long-standing industry pain point, i.e., inconsistent testing methods for Micro-LED optoelectronic parameters. The standard will provide a unified technical basis for the production and manufacturing, inspection and testing, and international trade and exchange of Micro-LED display devices, playing a crucial role in ensuring the quality and performance consistency of Micro-LED products.

In recent years, Micro-LED has caught widespread attention due to its advantages such as high brightness, low power consumption, and self-emitting properties, and is expected to become the next-generation mainstream display technology. The Bin mixing (parameter sorting) process is critical for quality control in the Micro-LED manufacturing process. Essentially, it involves optoelectronic parameter testing to accurately grade LEDs of different wavelengths and brightness levels to meet application requirements. This is a key step in achieving optical parameter consistency control for Micro-LEDs, since it directly impactsdisplay uniformity and yield improvement. However, as Micro-LED chips become miniaturized, it is difficult for traditional testing solutions to meet the demands.

To address this industry challenge, VISTAR has innovatively adopted the selective mass transfer technology to prepare electrically-driven Micro-LED test arrays, enabling rapidly batch testing of key optoelectronic parameters such as long/short-range brightness uniformity and chromaticity uniformity of Micro-LEDs. This is equivalent to establishing an efficient and precise "database", greatly facilitating the Bin mixing process for the accurate classification and matching of LEDs with different characteristics. This effectively resolved issues of insufficient optical uniformity in Micro-LEDs and laid a standardized foundation for producing high-performance Micro-LED displays.

Industry development begins with standards. In recent years, China, Japan, and South Korea have all initiated the development and standardization programs for the Micro-LED industry, making it imperative to seize the discourse power in international standards. In addition, the 2023-2024 Action Plan for Stable Growth in Electronic Information Manufacturing, issued by the Ministry of Industry and Information Technology (MIIT), explicitly emphasizes the promotion of the expanded application of Micro-Light Emitting Diode Display Devices (Micro-LED). The Implementation Plan for New Industry Standardization Pilot Project (2023–2035), issued by four departments including the National Standardization Administration, also clearly proposes the comprehensive advancement of the standard system for emerging industries, and emphasizes the development of key technical standards for Micro-LED displays in future display technologies.

In addition to VISTAR, research institutions such as the China Electronics Standardization Institute and multiple upstream and downstream enterprises jointly participated in the establishment of this international standard. It will promote the standardization and normalization of Micro-LED display technologies, and enhance China's discourse power and international influence in the field of semiconductor display devices.