Production process of color filter for liquid crystal display device and ink

• US 6,312,771 B1
• Filed: 05/05/1999
• Issued: 11/06/2001
• Est. Priority Date: 06/13/1997
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kashiwazaki, Akio, Nakazawa, Koichiro, Shirota, Katsuhiro, Hirose, Masashi, Shiba, Shoji
• Primary Examiner(s): Thomas, Alexander S.
• Application Number:
  US09/305,302
• Time in Patent Office: 916 Days
• Field of Search: 349/106, 349/108, 428/1, 428/1.33
• US Class Current: 428/1.33
• CPC Class Codes: B41J 2/01 Ink jet
• CPC Class Codes: C09D 11/30 Inkjet printing inks
• CPC Class Codes: C09K 2323/035 Ester polymer, e.g. polycarbonate, polyacrylate or polyester
• CPC Class Codes: G02B 5/201 in the form of arrays

Abstract

Disclosed herein is a process for production a color filter for liquid crystal display device by applying inks to a base by an ink-jet printing system to arrange colorants on the base, which comprises the steps of applying inks, which each comprise a homopolymer of a monomer represented by the formula (I)

or of the formula (II)

wherein R₁ is H or CH₃, and R₂ and R₃ are independently H or an alkyl group having 1 to 5 carbon atoms, and/or a copolymer of the monomer with another vinyl monomer and can be cured by light or heat, directly onto the base or onto a resin layer provided on the base by the ink-jet printing system, thereby arranging colorants contained in the inks; and then curing the thus-applied inks by light exposure or heating.

Claims

1. A color filter produced by a production process of applying inks to a base by a ink-jet printing system to arrange colorants on the base, which comprises the steps of:

applying inks, which each comprise a colorant, a water-containing liquid medium and an acrylic copolymer comprised of a monomer represented by the formula (I)

or of the formula (II)

wherein R₁ is H or CH₃, and R₂ and R₃ are independently H or an alkyl group having 1 to 5 carbon atoms, and an acrylic monomer containing a cationic structural unit and can be

cured by heat, directly between black matrices on the base or a resin layer provided on the base by the ink-jet printing system, thereby arranging the colorants contained in the inks; and

then curing the thus-applied inks by heating.

2. A liquid crystal display device obtained by holding a liquid crystal compound between a pair of substrates each having an electrode, wherein the color filter according to claim 1 is provided on the pair of substrates.

3. The liquid crystal display device according to claim 2, wherein one substrate is a thin film transistor substrate, and the color filter is formed on the thin film transistor substrate.