Active-matrix-addressed liquid crystal with conductor collecting lines of force emanating from data electrode

• US 5,307,189 A
• Filed: 03/04/1992
• Issued: 04/26/1994
• Est. Priority Date: 03/05/1991
• Status: Expired due to Term

• Current Assignee: OKI Electric Industry Company Limited
• Original Assignee: OKI Electric Industry Company Limited
• Inventors: Yoshizawa, Kayo, Nishiki, Akihiko, Ogura, Shigeki, Nomoto, Tsutomu
• Primary Examiner(s): Levy, Stuart S.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/845,683
• Time in Patent Office: 783 Days
• Field of Search: 359/54, 359/55, 359/56, 359/57, 359/58, 359/59, 359/87, 359/89, 359/67
• US Class Current: 349/143
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G02F 2201/121 common or background

Abstract

An active-matrix-addressed liquid crystal display includes an active-matrix substrate and an opposing electrode substrate on which opposing electrodes are formed. The opposing electrodes are formed into a combination of stripe electrodes each for collecting an electric field originating from the associated data line conductor, and display electrodes each corresponding to the associated pixel electrode. The stripe electrodes are connected with the associated display electrodes outside display areas. There are provided on the opposing electrode substrate a black mask formed of a photosensitive resin in which pigment of black is dispersed. The opposing electrodes may also be formed in an assembly of stripe electrodes each correspondingly to the associated pixel electrodes, no opposing electrode being disposed above the data line conductor.

Claims

1. A twisted nematic type of active-matrix-addressed liquid crystal display comprising:

an active-matrix substrate having data line conductors and an array of pixel electrodes formed thereon;

an array of driver transistors provided on said active-matrix substrate, each of said driver transistors being operably connected to an associated one of said pixel electrodes to drive said associated pixel electrode;

an opposing electrode substrate having opposing electrodes formed thereon; and

a liquid crystal secured in a space formed between said active-matrix substrate and said opposing electrode substrate;

each one of said opposing electrodes being formed in an assembly of a stripe electrode and a display electrode, said stripe electrode collecting lines of electric force emanating from an associated one of said data line conductors, and said display electrode being provided correspondingly to associated ones of said pixel electrodes, said stripe electrode being connected to an associated one of said display electrodes.

2. A display according to claim 1, wherein said stripe electrodes are disposed substantially parallel with said data line conductors and have substantially the same width as that of said data line conductors, and said display electrodes have substantially the same width as that of said pixel electrodes.

3. A display according to claim 2, wherein said stripe electrodes are electrically connected with each other outside display areas defined by said pixel electrodes.

4. A display according to claim 1, further comprising a black mask formed on said opposing electrode substrate and including a photosensitive resin in which pigment of black is dispersed.

5. A twisted nematic type of active-matrix-addressed liquid crystal display comprising:

an active-matrix substrate having data line conductors and an array of pixel electrodes formed thereon;

an array of driver transistors provided on said active-matrix substrate, each of said driver transistors being operably connected to an associated one of said pixel electrodes to drive said associated pixel electrode;

an opposing electrode substrate having an array of opposing electrodes formed thereon; and

a liquid crystal secured in a space formed between said active-matrix substrate and said opposing electrode substrate;

each one of said opposing electrodes being formed in an assembly of a stripe electrode and plural display electrodes, said stripe electrode collecting lines of electric force emanating from an associated one of said data line conductors, and each one of said plural display electrodes being provided correspondingly to, and having substantially the same lateral shape as that of, an associated one of said pixel electrodes, said stripe electrode being connected to associated ones of said display electrodes.

6. A display according to claim 5, wherein said stripe electrodes are disposed substantially parallel with said data line conductors and have substantially the same width as that of said data line conductors.

7. A display according to claim 6, wherein said stripe electrodes are electrically connected with each other outside display areas defined by said display electrodes and said pixel electrodes.

8. A display according to claim 5, further comprising a black mask formed on said opposing electrode substrate and including a photosensitive resin in which pigment of black is dispersed.

9. A twisted nematic type of active-matrix-addressed liquid crystal display comprising:

an active-matrix substrate having data line conductors and an array of pixel electrodes formed thereon;

an array of driver transistors provided on said active-matrix substrate, each of said driver transistors being operably connected to an associated one of said pixel electrodes to drive said associated pixel electrode;

an opposing electrode substrate having opposing electrodes formed thereon; and

a liquid crystal secured in a space formed between said active-matrix substrate and said opposing electrode substrate;

said opposing electrodes being formed in an assembly of stripe electrodes, each of which is provided into a stripe-like shape correspondingly to associated ones of said pixel electrodes without extending above said data line conductors, and wherein said stripe electrodes are electrically connected with each other outside display areas defined by said pixel electrodes.

10. A display according to claim 9, wherein said stripe electrodes are disposed substantially parallel with said data line conductors and have substantially the same width as that of said pixel electrodes.

11. A display according to claim 9, further comprising a black mask formed on said opposing electrode substrate and including a photosensitive resin in which pigment of black is dispersed.