Patent ID: 8120028

Claim:
An active device array substrate, comprising: a substrate having an alignment region and a predetermined sealing region, wherein the predetermined sealing region surrounds the alignment region; a pixel array disposed on the substrate within the alignment region, wherein the pixel array comprises: a plurality of scan lines; a plurality of data lines; a plurality of pixel units electrically connected to one of the scan lines and one of the data lines, each of the pixel units including: an active device electrically connected to the corresponding scan line and data line, wherein an insulation layer covers the active device and has a contact opening therein, and the opening is a ring-type trench completely surrounds the alignment region; and a pixel electrode disposed on the insulation layer and electrically connected to the active device through the contact opening; the insulation layer, disposed over the substrate and the pixel array, and extending from the alignment region to the predetermined sealing region, wherein the insulation layer has an opening exposing a surface of the substrate in a predetermined region which is located between the predetermined sealing region and the alignment region, and the opening completely surrounds the alignment region and is not disposed in the predetermined sealing region; and an alignment material layer only covering the alignment region and the pixel array, wherein the alignment material layer directly contacts with the pixel electrode of each pixel unit and the insulation layer.