公开(公告)号：EP1118900A4

公开(公告)日：2002-07-31

申请号：EP99940672

申请日：1999-09-03

申请人： MATSUSHITA ELECTRIC IND CO LTD

发明人： HATTORI KATSUJI ,  ISHIHARA SHOICHI ,  KUBOTA HIROFUMI ,  HATTA SHIN-ICHIRO ,  ADACHI KATSUMI ,  TANAKA YOSHINORI

IPC分类号： G02F1/1333 ,  G02F1/1343 ,  G02F1/1345 ,  G02F1/1362 ,  G02F1/139 ,  G09G3/36

CPC分类号： G09G3/3611 ,  G02F1/133707 ,  G02F1/134309 ,  G02F1/134336 ,  G02F1/1345 ,  G02F1/136286 ,  G02F1/1395 ,  G09G3/36 ,  G09G2300/0486 ,  G09G2300/0491 ,  G09G2310/0245 ,  G09G2310/061 ,  G09G2310/063 ,  G09G2330/026

摘要： Before starting a normal display operation of a liquid crystal display of bend alignment type, it is necessary to align the liquid crystal over the display part including all the pixels from the spray-aligned state to the bend-aligned state uniformly. However, conventionally, even when a simple AC voltage is applied, transition sometimes does not occur, or it takes a long time to cause transition to occur and consequently defective displaying due to defective alignment is liable to occur. A method of driving a liquid crystal display including an OBC cell, according to the invention, comprises applying an AC voltage on which a bias voltage is superposed between an electrode (22) and a pixel electrode (23) on substrates before starting a normal display operation and applying a zero or low voltage between the substrates. The two voltage applications are repeated alternately to cause bend alignment transition of all the pixels. After that, the operation is changed to a normal display operation.

公开(公告)号：EP1093105A4

公开(公告)日：2002-06-12

申请号：EP00905396

申请日：2000-02-28

申请人： MATSUSHITA ELECTRIC IND CO LTD

发明人： UEMURA TSUYOSHI ,  KUBOTA HIROFUMI ,  NAKAO KENJI

IPC分类号： F21V8/00 ,  G02B6/00 ,  G02F1/13357

CPC分类号： G02B6/0026 ,  G02B6/0038 ,  G02B6/0055 ,  G02F1/133615

摘要： An illuminating device reduced in thickness and weight with a light guide plate eliminated, and a display device provided with the illuminating device. A back-lighting illuminating device (2) to be disposed behind a liquid crystal display panel (3), comprising a light source (4) and a reflection plate (8), wherein the light source (4) is disposed in the vicinity of one end of the reflection plate (8) which is curved parabolically toward the display panel (3) as it extends away from the light source (4).

公开(公告)号：EP1113308A4

公开(公告)日：2006-07-05

申请号：EP00944361

申请日：2000-07-07

申请人： MATSUSHITA ELECTRIC IND CO LTD

发明人： KUBOTA HIROFUMI

IPC分类号： G02B5/20 ,  G02F1/1335 ,  G02F1/13357 ,  G02B5/08

CPC分类号： G02F1/133504 ,  G02B5/201 ,  G02F1/133514 ,  G02F1/133526 ,  G02F1/133555 ,  G02F1/133615 ,  G02F2001/133565

摘要： In a semitransparent liquid crystal display device comprising semitransparent layers having a projections and depressions structure including reflective portions and transparent portions, the transparent portions are formed so as to include nearly flat regions of the projections and depressions structure.