| abstract |
PROBLEM TO BE SOLVED: To provide an apparatus for controlling an electrochromic light control device, which is space-saving and has good responsiveness. An electromotive force generating element including an electromagnetic wave sensor (eg, phototransistor) and a voltage source (eg, battery), and an optical density changing element (electrochromic filter) driven by the electromotive force and containing an electrochromic material. ) And a resistor connected in parallel with the optical density changing element. [Selection figure] None |