Liquid crystal display apparatus

• US 5,066,110 A
• Filed: 12/22/1989
• Issued: 11/19/1991
• Est. Priority Date: 12/26/1988
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Nishimura, Eiichiro, Mitamura, Shoji, Onishi, Michihisa, Miyamoto, Mitunobo, Mizushima, Shigeaki, Hashimoto, Ryuji, Fukami, Seiji, Nagatomi, Hisato
• Primary Examiner(s): Wimer, Michael C.
• Assistant Examiner(s): Ho, Tan
• Application Number:
  US07/454,781
• Time in Patent Office: 697 Days
• Field of Search: 350/340, 350/341, 350/334, 350/336, 350/332, 357/23.7, 357/2, 357/4
• US Class Current: 349/146
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133397 for suppressing after-image or image-sticking
• CPC Class Codes: G02F 1/133711 by organic films, e.g. polymeric films

Abstract

A liquid crystal display apparatus comprising a pair of insulating substrates, a large number of picture element electrodes disposed into a matrix on the inner surface of one of the pair of substrates, a function element electrically connected to each of the picture element electrodes, and a liquid crystal layer charged between the pair of substrates, wherein the display apparatus further comprises on one of the substrate, an insulating protective film made of inorganic nitrides or inorganic oxides the insulating protective film being formed on the picture element electrode except for areas that constitute window regions, and an orientation film of a polyimide resin formed on the entire surface of the insulating protective film and window region, the orientation film has been rubbing-processed, whereby the occurrence of an internal polarization phenomenon can be prevented when a polyimide resin is used for the orientation film.

Claims

1. A liquid crystal display apparatus comprising a pair of insulating substrates, a large number of picture element electrodes disposed into a matrix on the inner surface of one of said substrates, a function element electrically connected to each of said picture element electrodes, and a liquid crystal layer charged between said pair of substrates, wherein said display apparatus further comprises on one said substrate, an insulating protective film made of an inorganic nitride, said insulating protective film being formed on said picture element electrode except for areas that constitute window regions, and an orientation film of a polyimide resin formed on the entire surface of said insulating protective film and window region, wherein said orientation film has been rubbing-processed in a first direction.

2. A liquid crystal display apparatus according to claim 1, wherein said window region is made elongate in configuration, thereby defining a lengthwise direction of said window region which substantially coincides with said first direction.

3. A liquid crystal display apparatus, comprising a pair of insulating substrates, a large number of picture element electrodes disposed into a matrix on the inner surface of one of said substrates, a function element electrically connected to each of said picture element electrodes, and a liquid crystal layer charged between said pair of substrates, wherein said display apparatus further comprises on one said substrate, an insulating protective film made of an inorganic nitride, said insulating protective film being formed on said picture element electrode except for areas that constitute window regions, and an orientation film of a polymide resin formed on the entire surface of said insulating protective film and window region, wherein said orientation film has been rubbing-processed in a first direction, wherein a plurality of window regions are provided on each of said picture element electrodes.

4. A liquid crystal display apparatus according to claim 3, wherein said window region is made elongate in configuration, thereby defining a lengthwise direction of said window region which substantially coincides with said first direction.

5. A liquid crystal display apparatus comprising a pair of insulating substrates, a large number of picture element electrodes disposed into a matrix on the inner surface of one of said substrates, a function element electrically connected to each of said picture element electrodes, and a liquid crystal layer charged between said pair of substrates, wherein said display apparatus further comprises on one said substrate, an insulting protective film being formed on said picture element electrode except for areas that constitute window regions, and an orientation film of a polyimide resin formed on the entire surface of said insulating protective film and window region, wherein said orientation film has been rubbing-processed in a first direction.

6. A liquid crystal display apparatus according to claim 5, wherein said window regions are made elongate in configuration, thereby defining lengthwise direction of said window regions which substantially coincide with said direction.

7. A liquid crystal display apparatus, comprising a pair of insulating substrates, a large number of picture element electrodes disposed into a matrix on the inner surface of one of said substrates, a function element electrically connected to each of said picture element electrodes, and a liquid crystal layer charged between sai pair of substrates, wherein said display apparatus further comprises on one said substrate, an insulating protective film made of an inorganic oxide, said insulating protective film being formed on said picture element electrode except for areas that constitute window regions, and an orientation film of a polyimide resin formed on the entire surface of said insulating protective film and window region, wherein said orientation film has been rubbing-processed in a first direction, wherein a plurality of window regions are provided on each of said picture element electrodes.

8. A liquid crystal display apparatus according to claim 7, wherein said window regions are made elongate in configuration, thereby defining lengthwise direction of said window regions which substantially coincide with said direction.