DIFF Subgroup
F21K 9/69 Details of refractors forming part of the light source
Introduced: January 2016
Full Title
Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers > Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction > Details of refractors forming part of the light source
No child classifications to compare. This is a leaf node in both IPC and CPC.