F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F21
LIGHTING
F21
LIGHTING
F21V
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
F21V
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
14/00
Controlling the distribution of the light emitted by adjustment of elements
14/00
Controlling the distribution of the light emitted by adjustment of elements
F21V14/003
by interposition of elements with electrically controlled variable light transmissivity, e.g. liquid crystal elements or electrochromic devices
F21V14/003
by interposition of elements with electrically controlled variable light transmissivity, e.g. liquid crystal elements or electrochromic devices