The present disclosure discloses a sun visor comprising: a supporting portion (1); a liquid crystal panel (5) fixed onto the supporting portion, or provided integrally with the supporting portion; a first light barrier (4) at least including two kinds of state: expanded and storage, wherein the first light barrier is parallel with the liquid crystal panel when in the expanded state, and an orthographic projection of the liquid crystal panel on the first light barrier falls into the first light barrier; a photosensitive sensor (8) for detecting an intensity of an interference light; and a control circuit connected with the photosensitive sensor and the liquid crystal panel, for adjusting a driving voltage with respect to the liquid crystal panel according to a detection result of the photosensitive sensor.