Red LEDs and yellow-green LEDs were developed in the 1960s ... which was found to lead to a decrease in luminance efficiency. The realization of a blue LED with the luminous efficiency higher than ...

Light-emitting Diode Chip,Blue Light,Distribution Of Particles,White LED,Laser Irradiation,Luminous Efficiency,Viewing Angle,Action Of Gravity,Blue Irradiation,Copper Surface,Light Intensity ...