Patent ID: 7440074

Claim:
A method for repairing a light point defect pixel of a liquid crystal display device having a liquid crystal panel which comprises a pair of substrates, a liquid crystal layer interposed between said pair of substrates, and a pair of alignment film each of which is provided between said substrate and said liquid crystal layer, which restrains the orientation of the liquid crystals of said liquid crystal layer; the method comprising irradiating laser light on a region of said alignment film corresponding to said light point defect pixel to locally reduce or eliminate the orientation restraining force of said alignment film, providing polarizing plates positioned on one side and the other side of the liquid crystal panel when said laser light is irradiated, respectively; setting axes of polarization such that light transmitted through one of said polarizing plates can be transmitted through the other polarizing plate when the orientation restraining force of the alignment film is reduced or eliminated; and detecting the reduction or elimination of the orientation restraining force of the alignment film in real time by measuring the amount of said laser light transmitted through one of said polarizing plates after passing through the other polarizing plate and liquid crystal panel.