ILLUMINATION SYSTEM AND WAVELENGTH-CONVERTING DEVICE THEREOF

摘要

An illumination system (3) includes a solid-state light-emitting element (31) and a wavelength-converting device (32). A light (L1) in a first waveband is emitted to an optical path (P) by the solid-state light-emitting element (31). The wavelength-converting device (32) is disposed on the optical path (P) and includes a phosphor plate (321). The phosphor plate (321) is a solid mixture having a phosphor agent and a binder. The weight percent of the phosphor agent is from 10 to 70, such that the light (L1) in the first waveband is transformed into light (L2) in a second waveband. Under this circumstance, the efficiency of heat conduction of the phosphor plate (321) is effectively enhanced, thereby enhancing the conversion efficiency of the wavelength-converting device (32), which is strong enough to be applied to rotate with great rigidity. Meanwhile, not only the space requirement is reduced, but also the phenomena of hot spot and heat diffusion are avoided, such that the cost and difficulty of manufacturing the wavelength-converting device (32) are significantly reduced.