Optical: systems and elements – Absorption filter
Reexamination Certificate
2008-07-14
2011-11-29
Choi, Ling (Department: 1761)
Optical: systems and elements
Absorption filter
C252S586000, C406S150000, C406S150000
Reexamination Certificate
active
08068297
ABSTRACT:
The present invention relates to a pigment composition or pigment dispersion that is ideal for producing the blue pixel portion of a color filter for a liquid crystal display device, and a color filter. The invention has an object of providing a color filter having a blue pixel portion that yields a liquid crystal display device having a high degree of contrast that enables the display screen to be viewed with improved clarity, and a high level of brightness that produces a brighter display screen, as well as providing a pigment composition or dispersion that can be used to produce the color filter. The above object can be realized by using a dioxazine derivative that is substituted with a sulfamoyl group having a specific polyalkylene oxide group, and a pigment composition or dispersion for a color filter that includes this dioxazine derivative and a blue organic pigment or violet organic pigment.
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Funakura Seiji
Kondou Hitoshi
Kudou Arata
Ahvazi Bijan
Choi Ling
DIC Corporation
Edwards Angell Palmer & & Dodge LLP
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