Patent ID: 9746151
Date: 2017-08-29
CPC Classifications: B60Q,F21S

Claim:
1. A light source assembly comprising: a laser source configured to emit a laser beam; an optical splitter comprising a transparent substrate, the substrate comprising a first solid portion and a second solid portion connected to the first solid portion, thereby forming an optical transition therebetween, the first solid portion positioned between the laser source and the second solid portion; a fluorescent layer configured to absorb the laser beam passing through the substrate and convert the laser beam into visible light; an optical-electrical converter positioned adjacent to the fluorescent layer, able to receive a portion of the visible light from the fluorescent layer when the fluorescent layer generates the visible light, the optical-electrical converter configured to convert the received visible light into an electrical signal; and a voltage controller configured to apply a voltage to the optical splitter when the voltage controller receives no electrical signal from the optical-electrical converter; wherein a refractive index of the first solid portion is equal to a refractive index of the second solid portion when voltage controller applies no voltage to the optical splitter, at least the refractive index of the first solid portion increases when the voltage controller applies the voltage to the optical splitter, thereby causing the refractive index of the first solid portion to be greater than the refractive index of the second solid portion and the optical transition to be transformed into an optical splitting surface which is able to cause the laser beam from the laser source to be totally reflected.