Liquid crystal display device and inspection method for a transparent substrate
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Abstract
A liquid display device of D-STN mode capable of suppressing a line-shaped ununiformity of brightness in displaying a dark appearance is presented. A displaying cell 1 and a compensation cell 21 are formed so that there is a difference of thickness of at least 0.05 mm between the thickness of a glass substrate 2 at a front side of the displaying cell 1 and the thickness of a glass substrate at a rear side of the compensation cell 21. The displaying cell 1 and the compensation cell 21 are arranged between a first polarizing plate 32 and a second polarizing plate 33. A backlight 31 is of a type emitting light whose half value width with respect to the peak luminance is at least 5 nm.
10 Citations
6 Claims
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1-4. -4. (canceled)
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5. An inspection method for inspecting a distribution of thickness of a transparent substrate, characterized in that:
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a first transparent substrate having a known distribution of thickness and a second transparent substrate to be inspected are prepared, wherein the difference of thickness in average between first and second transparent substrates is not more than 50 μ
m,the first transparent substrate and the second transparent substrate are arranged so that light transmits through a first substrate and a second substrate, a substrate gap of at least 0.1 mm is provided between the first substrate and the second substrate, a light source for irradiating light whose half value width with respect to the peak luminance is at least 5 nm is prepared, and the degree of distribution of thickness of the second transparent substrate is judged from an interference intensity distribution of light passing through the first transparent substrate and the second transparent substrate. - View Dependent Claims (6)
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Specification