公开(公告)号：JPH02130528A

公开(公告)日：1990-05-18

申请号：JP28376188

申请日：1988-11-11

Applicant: IBM JAPAN

Inventor： IKEDA AYUMI ,  KOSEKI TOSHIHIKO ,  UEKI TOSHIHIRO

IPC: G02F1/1335 ,  G02F1/1337

Abstract: PURPOSE:To provide the function of a color filter having excellent color purity and a uniform liquid crystal orienting function to one film by forming the org. film of the liquid crystal display device of polyimide having a specific repeating unit. CONSTITUTION:This device has the film commonly having the function of an orienting layer which regulates the orientation of liquid crystal molecules and the function of the color filter. The film has the repeating unit expressed by any one among the formula I, II and III. Namely, the polyimide is obtd. by the condensation polymn. reaction of a diamine component and acid anhydride component. More specifically, both are subjected to a ring opening polyaddition reaction in a solvent to form a polyimide precursor. A dye is dispersed into this precursor and the dispersion is applied on a glass substrate for a liquid crystal display element and is dried and heat treated. The org. film which commonly has the functions of the color filter having the repeating unit and the liquid crystal orienting film is formed in this way.

公开(公告)号：JPH02166422A

公开(公告)日：1990-06-27

申请号：JP32056588

申请日：1988-12-21

Applicant: IBM JAPAN

Inventor： IKEDA AYUMI ,  KOSEKI TOSHIHIKO ,  UEKI TOSHIHIRO

IPC: G02F1/1335 ,  G02F1/136 ,  G02F1/1362 ,  G02F1/1368 ,  H01L29/786

Abstract: PURPOSE:To form a light shielding layer which eliminates the damages on picture element electrodes and other electrodes at the time of production, withstands a high temp., is thin in film thickness and can shield light in the regions between the picture elements with good positional accuracy by forming the light shielding layer consisting of an acrylic resin having a crosslinking structure. CONSTITUTION:The light shielding layer 10 consisting of the acrylic resin having the crosslinking structure dispersed with carbon black is formed between the picture element electrodes 6 on a glass substrate 2 and on TFTs 8. The acrylic resin having the crosslinking structure can be formed by exposing, developing and etching a negative photoresist consisting of the acrylic resin and a photopolymn. initiator. The light shielding layer 10 which is increased in the thickness of the layer, withstands the high temp., and does not damage the picture element electrodes 6 and the other electrodes at the time of production is obtd. in this way.

公开(公告)号：JPH02166419A

公开(公告)日：1990-06-27

申请号：JP32056488

申请日：1988-12-21

Applicant: IBM JAPAN

Inventor： MACHINO HARUHIRO ,  UEKI TOSHIHIRO

IPC: G02F1/133 ,  G02F1/1335 ,  G02F1/1343 ,  G02F1/1362 ,  G09G3/20 ,  G09G3/36

Abstract: PURPOSE:To obtain a gradational display by specifying the ratio of light transmissivity of light transmissivity control layers for many picture elements in one display unit. CONSTITUTION:The light transmissivity control layers 31-34 are provided inside an opposite substrate 4, i.e. on the side of a TFT array substrate 2 and arranged in areas of picture elements T1-T4, and the ratio of light transmissivity of the light transmissivity control layers 31-34 is set to 2 :2 :2 ...2 , i.e. 1:2:4:8. Therefore, the light passing and light shielding of the picture elements T1-T4 are combined to represent 16 gradations. Consequently, the gradational display is made without increasing the area of one display unit nor adjusting finely a voltage applied to liquid crystal of each picture element.