Patent ID: 8441643

Claim:
A method comprising: transmitting light at a first luminance level from a backlight unit to illuminate a thin-film transistor liquid crystal display module produced by a manufacturing process, the thin-film transistor liquid crystal display module including a plurality of pixels and circuitry to control the amount of light permitted through the plurality of pixels; operating the plurality of pixels at a plurality of gray scale levels; measuring the transmittance of the thin-film transistor liquid crystal display module illuminated at the first luminance level at each of the plurality of gray scale levels; transmitting light at a second luminance level from a backlight unit to illuminate the thin-film transistor liquid crystal display module; operating the plurality of pixels at the plurality of gray scale levels; measuring the transmittance of the thin-film transistor liquid crystal display module illuminated at the second luminance level at each of the plurality of gray scale levels; identifying the photosensitivity of the thin-film transistor liquid crystal display module by determining the difference between transmittance of the thin-film transistor liquid crystal display module illuminated at the first and second luminance levels for each of the gray scale levels; comparing the photosensitivity of the thin-film transistor liquid crystal display module to a sensitivity threshold; and modifying at least one parameter of the manufacturing process based on the comparison.