Hitachi, Ltd.

Hitachi Device Engineering Co., Ltd.

Takayuki Iura

Hiroyuki Takahashi

Toru Watanabe

Toshimitsu Matsudo

Hiroshi Nakamoto

Toshiyuki Sakuma

Shigeharu Hatayama

Yoshio Sugaya

A liquid crystal display device comprising, a liquid crystal panel having parallel provision of a plurality of common electrodes COM extending in a first direction on one of a pair of substrates with a liquid crystal layer interposed therebetween and parallel provision of a plurality of segment electrodes SEG extending in a second direction crossing in the first direction on the other of the pair of substrates, a common driver for applying a scan signal(s) to the plurality of common electrodes COM, and a segment driver for applying to each of the plurality of segment electrodes SEG a pulse-width-modulated data signal voltage corresponding to display data, wherein the segment driver is operable upon switching of the pulse-width-modulated data signal voltage input to the segment electrode SEG to temporarily output to the segment electrode a voltage which is substantially equal to a non-select voltage of the common electrodes COM.

Liquid crystal display device

A liquid crystal display device which reduces the width of the frame and effectively utilizes the corner of the device. The liquid crystal display device comprises a liquid crystal display element; printed circuit boards arranged along at least two adjoining sides of the liquid crystal display element and mounting electronic components to drive the liquid crystal display element; a case to accommodate the liquid crystal display element and the printed circuit boards; and an interconnect board provided at the corner made by the two sides of the liquid crystal display element to electrically connect the printed circuit boards, the interconnect board being arranged to overlap the liquid crystal display element.

It is possible to reduce the thickness and size of a liquid crystal display module and to suppress any display irregularity due to the heat generation of a light source, by providing a liquid crystal display module which is characterized by an upper frame 1 made of a thin stainless steel sheet and a lower frame 2 made of a thin aluminum sheet thereby to reduce the thickness of an intermediate frame 42, and to form the lower frame 2 with cut-away portions 55 and 56, which extend in a direction perpendicular to a back light source 36 over at least the area of a liquid crystal display panel 62 and which are positioned symmetrically to the line perpendicular to the center portion of the back light source 36, cut-away portions 57 and 58, which extend just below the back light source 36 in the longitudinal direction of the back light source 36, and notches 53 and 54 which are positioned below the two end portions of the back light source 36.

Liquid crystal display module having cut-away portions of the back frame

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Mobara, Japan

Takayuki Iura