| US 7,561,238 B2 | ||
| Liquid crystal display device and method of manufacturing the same | ||
| Michiaki Sakamoto, Tokyo (Japan); Takahiko Watanabe, Tokyo (Japan); Hirofumi Ihara, Tokyo (Japan); Hironori Kikkawa, Tokyo (Japan); Mamoru Okamoto, Tokyo (Japan); Shinichi Nakata, Tokyo (Japan); Yuji Yamamoto, Tokyo (Japan); Masayoshi Suzuki, Tokyo (Japan); Teruaki Suzuki, Tokyo (Japan); Toshiya Ishii, Tokyo (Japan); and Hiroshi Kanoh, Tokyo (Japan) | ||
| Assigned to NEC LCD Technologies, Ltd., Kanagawa (Japan) | ||
| Filed on Apr. 13, 2007, as Appl. No. 11/787,013. | ||
| Application 09/852077 is a division of application No. 09/363868, filed on Jul. 29, 1999, abandoned. | ||
| Application 11/787013 is a continuation of application No. 09/852077, filed on May 09, 2001, abandoned. | ||
| Claims priority of application No. 1998/219314 (JP), filed on Aug. 03, 1998; and application No. 1999/168334 (JP), filed on Jun. 15, 1999. | ||
| Prior Publication US 2008/0074586 A1, Mar. 27, 2008 | ||
| Int. Cl. G02F 1/1343 (2006.01) | ||
| U.S. Cl. 349—141 [349/43; 349/139] | 18 Claims |
| 1. A liquid crystal display device, comprising:
a first substrate;
a second substrate, said second substrate being transparent;
a color filter layer disposed on said first substrate;
a liquid crystal layer disposed between said color filter layer and said second substrate, said liquid crystal layer having
liquid crystals oriented parallel to said first substrate when no voltage is applied;
a plurality of scan signal electrodes and a plurality of picture signal electrodes, said plurality of scan signal electrodes
and said plurality of picture signal electrodes oriented perpendicular to and crossing each other, to form a matrix of regions
surrounded by said plurality of scan signal electrodes and said plurality of picture signal electrodes;
a plurality of thin film transistors at cross positions of said matrix;
at least one picture element disposed in each said region;
a common electrode and a pixel electrode in each of said at least one picture element, said common electrode being connected
with other common electrodes in other picture elements via common electrode lines for providing a reference voltage to the
plurality of picture elements, said pixel electrode being connected to a corresponding thin film transistor and being disposed
at an opposite side to a position of said common electrode in a region of said picture element, said common electrode and
said pixel electrode being disposed between said color filter layer and said liquid crystal, wherein said common electrode
is shaped as a grid for surrounding said picture element, said pixel electrode is disposed to cross over said picture element,
and a part of said common electrode line is used as said common electrode, and wherein said common electrode is formed so
that said plurality of thin film transistors is hidden behind said common electrode when viewed from said second substrate;
a transparent insulating separation film disposed between a layer at which said common electrode is disposed and a layer at
which said pixel electrode is disposed, an electric field being generated between said common electrode and said pixel electrode
though said liquid crystal layer, said electric field being mainly parallel to said first substrate; and
an overcoat layer for protecting said color filter layer disposed on said color filter layer, said common electrodes being
disposed on said overcoat layer, said transparent insulating separation film being disposed on said common electrodes, and
said pixel electrodes being disposed on said transparent insulating separation film.
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