GB/T 23595.2-2025 in English

1. Background and significance of the standard

With the rapid development of semiconductor lighting and display technology, the application scope of rare earth phosphors for LEDs is expanding. Traditional white light LEDs mainly rely on yellow phosphors, but with technological advances, new phosphor systems (such as garnet structure aluminates, nitrides, silicates, etc.) have gradually become mainstream.

The formulation of this standard aims to unify the relative brightness determination method of LED rare earth phosphors, meet the industry's demand for rapid analysis and testing, and improve product quality and market competitiveness. By accurately measuring relative brightness, the optical properties and application value of phosphors can be effectively evaluated.

2. Comparison of standard frameworks

3. Analysis of key technical indicators

Instrument requirements:

• Spectroradiometer: wavelength range 380nm~780nm, relative brightness accuracy ±1%
• Sample plate size: inner diameter 26.0mm±0.5mm, depth 4.0mm±0.1mm

Test environment requirements:

• Temperature: 25℃±2℃
• Humidity: ≤65%
• Lighting conditions: operate in dark place

4. Implementation suggestions

Enterprise level:

• Establish a standard phosphor sample library to ensure calibration accuracy
• Purchase instruments and equipment that meet the requirements and calibrate them regularly
• Strengthen personnel training and improve operational standardization

Industry level:

• Promote the dissemination of standards and ensure consistent implementation
• Establish a mutually recognized testing platform
• Promote the synchronous development of technological innovation and standards

5. Charts to illustrate key points of the specification

Figure 1: Relative brightness measurement flow

Figure 2: Relative brightness comparison of different phosphor systems