Patent ID: 7307444
Filing Date: 2007-12-11
Classification: G01N,G02F

Abstract:
1. A liquid crystal panel testing method for testing a light fastness of a liquid crystal panel comprising a pair of substrates and a liquid crystal layer interposed between said substrates, the method comprising: (a) irradiating a test subject area of said liquid crystal panel with a laser beam, with at least one of a wavelength, an irradiation energy, and an irradiation duration of said laser beam set as a variable parameter; (b) irradiating said liquid crystal panel with an observation beam and detecting an intensity of said observation beam after passing through said liquid crystal panel; and (c) determining the light fastness of said liquid crystal panel based on a difference in the intensity of said observation beam and an intensity of the laser beam corresponding to the setting of said variable parameter of said laser beam; wherein, in said (a), an alignment of said liquid crystal layer in said test subject area decreases locally upon irradiation with said laser beam.