Patent ID: 7898619
Filing Date: 2011-03-01
Classification: G02F,G09G

Abstract:
1. A liquid crystal display comprising: a liquid crystal display panel formed by sandwiching a liquid crystal layer between an active matrix substrate and an opposed substrate; and a backlight that illuminates the liquid crystal display panel from a side of the active matrix substrate; wherein the active matrix substrate comprises a first optical sensor and a second optical sensor in a region surrounding a display region in a substrate surface on a side of the liquid crystal layer, the first optical sensor is formed so that light external to the liquid crystal display and light propagating inside the active matrix substrate enter the first optical sensor, the second optical sensor is formed so that light propagating inside the active matrix substrate enters the second optical sensor, and the second optical sensor is shielded from the external light; and wherein the first optical sensor is positioned for receiving both light from external the display and also light from the backlight.