Patent ID: 7619194
Filing Date: 2009-11-17
Classification: G01J,G02F,G09G,H01J

Abstract:
1. An electro-optical device comprising: a panel that is formed so that an electro-optical material is held between a first substrate and a second substrate; a lighting unit that irradiates light to a surface of the first substrate or the second substrate of the panel; a light detecting portion that detects an illuminance of ambient light; and a light control portion that controls the lighting unit on the basis of result detected by the light detecting portion, wherein the light detecting portion is provided on the first substrate or on the second substrate, wherein the light detecting portion includes: a first optical sensor that is irradiated with ambient light; a second optical sensor that is shielded against irradiation of ambient light; a first electrode that is configured to overlap the first optical sensor through an insulating layer in plan view; a second electrode that is configured to overlap the second optical sensor through an insulating layer in plan view; and an electric potential applying portion that controls an electric potential of the first electrode and an electric potential of the second electrode, wherein the first and second optical sensors are photodiodes, and where a difference in electric potential between a cathode electrode of the first optical sensor and the first electrode is V