Blue Button Laser Induced Yellow Phosphor for Highly-Efficient White Light Generation

LARP (Laser Assisted Remote phosphors) is getting more and more challenging for automobile industries. Laser technology could be very interesting for more classical low beam and high beam solutions for automotive. The laser excited yellow phosphor which is Cerium (Ce) doped YAG phosphor has been developed and various geometries based on transmission and reflection modes have also been studied and it has been found that the phosphor has longevity of several thousand hours which is the edge of the studies done at CSIR-NPL. In present technology, the new concept of blue button laser induced highly efficient white light generation has been achieved. To achieve this, a new design of yellow phosphor integrated in Polydimethylsiloxane (PDMS) layer with optimum thickness and sandwiched between two layers of quartz plates of ~3mm thickness in circular form has been fabricated. The illuminance of this proposed design will be almost three times higher than the InGaN-based blue LED-based headlights. This could be a better replacement of the existing headlights for high beam illuminance as compared to the existing one for better penetration for long distances to avoid accidents for automobiles on highways.

It can be used in automobile headlights for high beam illuminance as compared to the existing one for better penetration for long distances to avoid accidents for automobiles on highways. It could also be used in playgrounds’ tunable lighting, to increase the aspect ratio of projectors, rail engine headlights as well as in bullet train headlights.

The proposed technology could be beneficial for the headlights for high beam illuminance as compared to the existing one for better penetration for long distances.