公开(公告)号：JPH06273724A

公开(公告)日：1994-09-30

申请号：JP4115493

申请日：1993-03-02

Applicant: IBM

Inventor： SAITO YUKITO ,  TERUYA MAYUMI

IPC: G02F1/1333 ,  G02F1/1334 ,  G02F1/1335 ,  G02F1/137

Abstract: PURPOSE: To provide a structure for realizing uniform lightness and high contrast which is a scattering type liquid crystal display device applicable to a direct viewing type display device. CONSTITUTION: This device is provided with a scattering type liquid crystal cell 10 such as a high polymer dispersion type liquid crystal or the like, a first surface and a second surface for holding it there between, a background provided with black patterns 17 occupying one of display picture elements or the area of the integer multiple on the first surface and first openings 19 between them and a light shielding mask 21 provided with second openings 23 at positions facing the black patterns 17 on the second surface for light shielding the positions facing the first openings 19.

公开(公告)号：JPH0876127A

公开(公告)日：1996-03-22

申请号：JP20572094

申请日：1994-08-30

Applicant: IBM

Inventor： TERUYA MAYUMI ,  TAKANO HIDEO ,  SAITO YUKITO ,  KAMIYA HIROYUKI ,  HASEGAWA MASAKI

IPC: G02F1/1337

Abstract: PURPOSE: To provide a wide view angle liquid crystal display device with which problems such as the complication of processes, the change of electric characteristics and the instability of oriented state are canceled. CONSTITUTION: A soluble polyimide solution a prepared by dissolving soluble polyimide, of which the pretilt angle is changed by a burning temperature, in a solvent and applied to a color filter board 12 and a TFT substrate 14. The lower half of picture elements 28 on the color filter substrate 12 and the upper half of picture elements 28 on the TFT substrate 14 are heated and dried earlier than the other parts for prescribed time by irradiating them with laser beams, and the remaining parts are naturally dried. The pretilt angle of molecule 16A of liquid crystal 16 in contact with the heated and dried part gets small but the pretilt angle of molecule 16A in contact with the naturally dried part gets large and the direction of satisfactory view angle is inverted for the upper half and lower half of picture elements 28 so that the wide view angle can be obtained.