Patent ID: 8237894

Claim:
A color filter comprising a red filter segment, a green filter segment and a blue filter segment, on a substrate, wherein when a pseudo-white LED is used which has spectral properties such that it has a peak wavelength (λ 1 ) at which an emission intensity becomes the highest, within a wavelength range of 430 nm to 485 nm, a peak wavelength (λ 2 ) of a second emission intensity within a wavelength range of 520 nm to 580 nm and a peak wavelength (λ 3 ) of a third emission intensity within a wavelength range of 610 nm to 670 nm, a ratio (I 2 /I 1 ) of an emission intensity I 2 at the wavelength λ 2 to an emission intensity I 1 at the wavelength λ 1 is 0.2 or more, but 0.7 or less, and a ratio (I 3 /I 1 ) of an emission intensity I 3 at the wavelength λ 3 to the emission intensity I 1 at the wavelength λ 1 is also 0.2 or more, but 0.7 or less, an area of a triangle defined by three chromaticity points of the red, green and blue filter segments expressed as (x R , y R ), (x G , y G ) and (x B , y B ) on the x-y chromaticity diagram occupies 72% or more of an area standard triangle defined by 3 points of red (0.67, 0.33), green (0.21, 0.71) and blue (0.14, 0.08), and the color filter has a color temperature of 6000K or more, wherein each of the red, green and blue filter segments has a thickness of 3.3 μm or less, and wherein the green filter segment contains (i) C.I. Pigment Green 36, C.I. Pigment Green 7 and C.I. Pigment Yellow 150 in a weight ratio of 20-80/15-75/5-65, (ii) C.I. Pigment Green 36, C.I. Pigment Green 7 and C.I. Pigment Yellow 185 in a weight ratio of 20-80/15-75/5-65, (iii) C.I. Pigment Green 36, C.I. Pigment Green 7 and C.I. Pigment Yellow 139 in a weight ratio of 20-80/15-75/5-65, (iv) C.I. Pigment Green 36, C.I. Pigment Yellow 150 and C.I. Pigment Yellow 185 in a weight ratio of 40-90/15-55/5-55, or (v) C.I. Pigment Green 36, C.I. Pigment Green 7, C.I. Pigment Yellow 150 and C.I. Pigment Yellow 185 in a weight ratio of 20-80/5-70/5-70/5-70.