Patent ID: 8810553
Filing Date: 2014-08-19
Classification: G01J,G02F,G09G

Abstract:
1. A liquid crystal display comprising: a liquid crystal panel including an active matrix substrate, an opposed substrate, and a liquid crystal layer interposed between the two substrates; a photodetector unit including: an insulating layer being disposed on the ambient light photosensor; an ambient light photosensor reader unit for reading a voltage charged in the first capacitor for a predetermined read period, wherein the photodetector unit is disposed on a first surface of the active matrix substrate that is in contact with the liquid crystal layer, and the surface of the photodetector unit except for the semiconductor layer and a periphery thereof is covered by a light-shielding layer formed on the active matrix substrate; and a second switching element comprising a first electrode that is directly coupled to the first capacitor and the source electrode, wherein the second switching element is provided for the liquid crystal panel in a region other than the ambient light photosensor and the ambient light photosensor reader unit, wherein the second switching element and the first capacitor in the photodetector unit are entirely covered by the light-shielding layer, and wherein the second switching element further comprises a second electrode that is directly coupled to a second capacitor and an amplifier circuit with an output terminal.