Patent ID: 7821285

Claim:
A liquid crystal display apparatus, comprising: a pixel array section including a plurality of unit pixels disposed in a matrix and each unit pixel including a pixel transistor, a capacitive element connected to an output electrode of said pixel transistor and a liquid crystal cell configured to display a gradation in accordance with a voltage retained in said capacitive element; a first data line connected to an input electrode of each unit pixel of first pixel group in a unit of a pixel column from among the unit pixels of said pixel array section; a second data line connected to an input electrode of each unit pixel of second pixel group in a unit of a pixel column from among the unit pixels of said pixel array section; a writing unit configured to write a first measurement signal into the unit pixels of the first pixel group through the first data line and writing a second measurement signal into the unit pixels of the second pixel group through the second data lines line; a voltage supply control unit configured to selectively supply a predetermined dc voltage to the first and second data lines; a data line short-circuiting unit configured to short-circuit the first data line and the second data line after the voltage supplied by said voltage supply control unit; a reading out unit configured to read out the first and second measurement signals from the unit pixels of the first and second pixel groups into the first and second data lines, respectively, after the first and second data lines are short-circuited to each other by said data line short-circuiting unit; and a testing unit configured to compare the potential at the first data lines line and the potential at the second data line with each other after the reading out by said reading out unit and performing a test of said pixel array section based on a result of the comparison.