US 9,809,752 B2
Liquid crystal display device
Kazuaki Hatsusaka, Kita-adachi-gun (JP); Hidenari Akiyama, Kita-adachi-gun (JP); Akira Kimura, Sakura (JP); Seiji Funakura, Sakura (JP); and Katsunori Shimada, Sakura (JP)
Assigned to DIC CORPORATION, Tokyo (JP)
Appl. No. 14/899,345
Filed by DIC Corporation, Tokyo (JP)
PCT Filed Jun. 6, 2014, PCT No. PCT/JP2014/065119
§ 371(c)(1), (2) Date Jan. 15, 2016,
PCT Pub. No. WO2014/203752, PCT Pub. Date Dec. 24, 2014.
Claims priority of application No. 2013-127472 (JP), filed on Jun. 18, 2013.
Prior Publication US 2016/0130502 A1, May 12, 2016
This patent is subject to a terminal disclaimer.
Int. Cl. G03F 1/00 (2012.01); C09K 19/58 (2006.01); C09K 19/20 (2006.01); C09K 19/54 (2006.01); C09K 19/30 (2006.01); C09K 19/34 (2006.01); C09K 19/14 (2006.01); C09K 19/04 (2006.01); C09K 19/52 (2006.01); G02F 1/137 (2006.01); C09K 19/12 (2006.01); C09K 19/18 (2006.01); C09K 19/32 (2006.01)
CPC C09K 19/588 (2013.01) [C09K 19/14 (2013.01); C09K 19/2021 (2013.01); C09K 19/2028 (2013.01); C09K 19/3028 (2013.01); C09K 19/3066 (2013.01); C09K 19/3068 (2013.01); C09K 19/3402 (2013.01); C09K 19/348 (2013.01); C09K 19/3458 (2013.01); C09K 19/54 (2013.01); C09K 19/586 (2013.01); C09K 2019/0437 (2013.01); C09K 2019/0448 (2013.01); C09K 2019/0466 (2013.01); C09K 2019/122 (2013.01); C09K 2019/123 (2013.01); C09K 2019/181 (2013.01); C09K 2019/2035 (2013.01); C09K 2019/2042 (2013.01); C09K 2019/2078 (2013.01); C09K 2019/301 (2013.01); C09K 2019/304 (2013.01); C09K 2019/3004 (2013.01); C09K 2019/3009 (2013.01); C09K 2019/3016 (2013.01); C09K 2019/3025 (2013.01); C09K 2019/3027 (2013.01); C09K 2019/3063 (2013.01); C09K 2019/3069 (2013.01); C09K 2019/3083 (2013.01); C09K 2019/323 (2013.01); C09K 2019/3422 (2013.01); C09K 2019/3425 (2013.01); C09K 2019/523 (2013.01); C09K 2219/03 (2013.01); G02F 2001/13793 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A liquid crystal display device comprising:
a first substrate; a second substrate; a liquid crystal layer between the first substrate and the second substrate; a color filter; a pixel electrode; and a common electrode; the color filter including a black matrix and at least RGB three-color pixel units,
wherein the liquid crystal layer is formed of a material containing chiral liquid crystals, the material containing chiral liquid crystals containing a nematic liquid crystal composition and at least one chiral compound, the nematic liquid crystal composition containing at least two achiral liquid crystal compounds, and
the RGB three-color pixel units contain a halogenated metal phthalocyanine pigment as a coloring material in the G pixel unit, the halogenated metal phthalocyanine pigment containing a metal selected from the group consisting of Al, Si, Sc, Ti, V, Mg, Fe, Co, Ni, Zn, Ga, Ge, Y, Zr, Nb, In, Sn, and Pb as a central metal, wherein in the case where the central metal is trivalent, the central metal is bonded to or oxo- or thio-cross-linked to one halogen atom, hydroxy group, or sulfonate group, and in the case where the central metal is a tetravalent metal, the central metal is bonded to one oxygen atom, two same or different halogen atoms, a hydroxy group, or a sulfonate group,
wherein the nematic liquid crystal composition has a nematic liquid crystal phase at least in a temperature range of −10° C. to 50° C.