Enhancing optical performance of LED light diffusing plates through particle size and distribution control of organosilicone microspheres

The organosilicone microspheres (OSMS) samples with varying particle sizes and distributions were synthesized as the research model by precisely controlling the synthesis conditions. Subsequently, the influence of OSMS particle size and distribution on the optical properties of the Light-diffusing plates (LDPs) was investigated using this model by optical simulation and controlled experiment. The outcomes indicate that the particle size and distribution of OSMS particles significantly influence the scattering behavior and optical properties of the diffuser. Within the visible spectral range, the scattering effect of OSMS particles ranging from 1.0 to 2.5 μm gradually increases with larger particle sizes. However, OSMS particles below 1 μm demonstrate negligible scattering effects. Furthermore, within the 1.0–1.5 μm range, the forward scattering intensity of OSMS remains similar across various wavelengths; however, within the 1.5–2.0 μm range, the forward scattering intensity of OSMS is higher for blue light compared to yellow and red light. Additionally, the particle size distribution of OSMS affects transmittance and scattering properties. OSMS with a narrow particle size distribution and an average particle size ranging from 1.5 to 2.0 μm exhibit optimal characteristics, including high haze, enhanced light transmittance, and a gentle light effect.