Patent ID: 8614591
Filing Date: 2013-12-24
Classification: G09G

Abstract:
1. A mother substrate, comprising: a plurality of organic light emitting display panels arranged in a matrix; a first wiring line group comprising a plurality of first wiring lines located at peripheries of the panels and extending in a first direction to transmit at least one of external test power or signals to the panels; a second wiring line group comprising a plurality of second wiring lines located at peripheries of the panels and extending in a second direction that crosses the first direction to transmit at least one of external test power or signals to the panels; and a compensating unit coupled to a coupling wiring line for coupling a sheet unit wiring line from among the first and second wiring line groups to one of the panels, the sheet unit wiring line being configured to transmit a sheet unit test signal to at least two of the panels, the compensating unit being configured to subtract a voltage corresponding to a threshold voltage of a driving transistor included in a pixel of the one of the panels from the sheet unit test signal before transmitting the sheet unit test signal to the pixel of the one of the panels.