Patent ID: 8982293
Filing Date: 2015-03-17
Classification: G02F,G09G

Abstract:
1. A display apparatus comprising: a first substrate comprising a display area, on which an image is displayed, and a peripheral area surrounding at least a portion of the display area, wherein the first substrate further comprises: a plurality of pixel electrodes arranged in the display area; and a plurality of dummy pixel electrodes arranged in the peripheral area; a second substrate disposed opposite to and coupled to the first substrate, wherein the second substrate comprises: a reference electrode facing the pixel electrodes in the display area and facing the dummy pixel electrodes in the peripheral area; and a liquid crystal layer interposed between the first substrate and the second substrate, wherein the first substrate further comprises: a test line electrically connected to the dummy pixel electrodes; a first pad electrode configured to apply a test voltage to the test line to measure a liquid crystal capacitance; a reference voltage line configured to receive a reference voltage from an external source; and a second pad electrode configured to apply the reference voltage to the reference voltage line to measure the liquid crystal capacitance.