Patent ID: 7619726
Filing Date: 2009-11-17
Classification: G01N,G02B,G02F

Abstract:
1. A color filter having a red photoresist, a green photoresist and a blue photoresist, and having characteristics defined by following terms: a first spectrum of dark state a(λ), which is measured for light emitted from a backlight through two polarizers when the color filter is disposed between the two polarizers with polarization directions orthogonal to each other; a second spectrum of dark state b(λ), which is measured for light emitted from the backlight through the two polarizers without the color filter disposed between the two polarizers; a ratio spectrum of light leakage intensity I(λ), which is defined as the ratio of the first spectrum of dark state to the second spectrum of dark state (a(λ)/b(λ)); a first ratio of light leakage intensity P a second ratio of light leakage intensity P a first average value P a second average value P characterized in that, the color filter satisfying below conditions: P