Patent ID: 6909304
Filing Date: 2005-06-21
Classification: G01R,G09G,G11C,Y10S

Abstract:
1. A display device comprising: a gate driver for line-sequentially selecting pixels that are disposed in a matrix, so as to scan the pixels; a source driver for supplying a data signal to the pixels of a selected line; and a substrate, at least one of the gate driver and the source driver being monolithically formed on the substrate, wherein: the gate driver and the source driver each comprises a scanning circuit, and the scanning circuit of at least one of the gate driver and the source driver monolithically formed on the substrate periodically receives a clock signal and a start pulse, the start pulse having a certain width and being shifted as shift data in the scanning circuit in synchronism with the clock signal, and the start pulse is supplied to a first logic circuit with an output that is supplied after a predetermined delay from a last stage of the scanning circuit with respect to a shift direction of the shift data corresponding to the start pulse, so as to test the scanning circuit using a first output from the first logic circuit wherein: at least one of the gate driver and the source driver monolithically formed on the substrate comprises switching means for switching shift directions of the shift data, the clock signal and the start pulse being supplied to the scanning circuit of at least one of the gate driver and the source driver monolithically formed on the substrate, and the first output in each shift direction is supplied to a second logic circuit, so as to test the scanning circuit using a second output from the second logic circuit.