| abstract |
A liquid crystal dimming element, which has a liquid crystal layer containing a liquid crystal composition between a pair of substrates provided with electrodes, and at least one of the substrates has a liquid crystal alignment film for vertically aligning the liquid crystal, and the light absorption state is controlled by applying a voltage The liquid crystal dimming element is characterized by:nThe aforementioned liquid crystal composition contains a liquid crystal and a dichroic dye,nThe aforementioned liquid crystal alignment film is a liquid crystal alignment treatment agent containing a polyimide precursor in which a diamine with a specific side chain is used as part of the raw material or a polyimide in which the polyimide precursor is amideified As a result, the use ratio of the aforementioned diamine is 50 to 100 mol% with respect to the entire diamine component. |