F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F21
LIGHTING
F21
LIGHTING
F21K
NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
F21K
NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
F21K9/00
Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
F21K9/00
Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers