Patent ID: 7145358

Claim:
A display apparatus comprising: a substrate carrying a plurality of pixel cells arranged to form a matrix, each having a pixel switch and a pixel capacitance connected to the pixel switch and adapted to hold the pixel data written by way of a data line; a gate line drive circuit for sequentially driving a plurality of gate lines connected to the pixel switches; a data line drive circuit for sequentially driving a plurality of data lines; a data line test circuit including pairs of a high ON resistance first short-circuiting detecting resistor for connecting a predetermined electric potential and the corresponding one of the data lines and a first detector logic circuit adapted to input the electric potential of the data line connected to the first short-circuiting detecting resistor and binarize and output the input electric potential of the data line by referring to a predetermined threshold value; and a gate line test circuit including pairs of a high ON resistance second short-circuiting detecting resistor for connecting a predetermined electric potential and the corresponding one of the gate lines and a second detector logic circuit adapted to input the electric potential of the gate line connected to the second short-circuiting detecting resistor and binarize and output the input electric potential of the gate line by referring to a predetermined threshold value.