| US 7,593,078 B2 | ||
| Transflective liquid crystal display device having liquid crystal layer in the reflective portion thicker than in the transmissive portion | ||
| Takahiro Ochiai, Chiba (Japan); Toshio Miyazawa, Chiba (Japan); Masahiro Maki, Mobara (Japan); and Tohru Sasaki, Mobara (Japan) | ||
| Assigned to Hitachi Displays, Ltd., Chiba (Japan) | ||
| Filed on Jul. 02, 2007, as Appl. No. 11/772,275. | ||
| Claims priority of application No. 2006-192384 (JP), filed on Jul. 13, 2006. | ||
| Prior Publication US 2008/0013022 A1, Jan. 17, 2008 | ||
| Int. Cl. G02F 1/1335 (2006.01); G02F 1/1343 (2006.01) | ||
| U.S. Cl. 349—114 [349/141] | 12 Claims |
| 1. A transflective liquid crystal display device comprising a liquid crystal display panel having a pair of substrates and
a liquid crystal layer sandwiched between the substrates, wherein
the liquid crystal display panel has plural subpixels each having a transmissive portion and a reflective portion,
each of the plural subpixels has a pixel electrode and counter electrodes formed on one of the substrates,
the pixel electrode and the counter electrodes produce an electric field to drive the liquid crystal layer,
at each of the subpixels, the pixel electrode is shared between the transmissive portion and the reflective portion,
at each of the subpixels, the counter electrode of the transmissive portion is independent of the counter electrode of the
reflective portion,
the counter electrodes for the transmissive portion and the reflective portion are applied with different potentials,
the transmissive portion operates in normally black mode and displays black when no voltage is applied,
the reflective portion operates in normally white mode and displays white when no voltage is applied, and
the liquid crystal layer in the reflective portion is thicker than the liquid crystal layer in the transmissive portion.
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