Liquid crystal display panel with plural substrates

• US 5,164,853 A
• Filed: 10/21/1991
• Issued: 11/17/1992
• Est. Priority Date: 04/06/1989
• Status: Expired due to Fees

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Shimazaki, Yutaka
• Primary Examiner(s): Howell, Janice A.
• Assistant Examiner(s): TRICE, RONALD
• Application Number:
  US07/779,169
• Time in Patent Office: 393 Days
• Field of Search: 359/82, 359/83, 359/88
• US Class Current: 349/73
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/13336 Combining plural substrates to produce large-area displays, e.g. tiled displays

Abstract

A liquid crystal display panel is composed of a plurality of panel elements. The panel elements are arranged in matrix form in a plane. Each element comprises an upper flexible substrate having a plurality of electric terminals formed thereon and a lower flexible substrate having a plurality of electric terminals formed thereon. Two adjacent panel elements are arranged in such a manner that the terminals of the upper substrate are electrically connected to the terminals of the lower substrate through a conductive resin layer disposed therebetween.

Claims

1. A liquid crystal display panel comprising:

a plurality of panel elements, including at least first, second and third panel elements, arranged in matrix form in a plane, each of said elements comprising,

a first rectangular flexible substrate having a first edge and a second edge crossing said first edge,

a second rectangular flexible substrate having another first edge and another second edge crossing said another first edge, said first and second substrates being identical in shape with each other,

said second substrate being disposed substantially in parallel with said first substrate and in partially overlapping relation with said first edge of said first substrate perpendicular to said another first edge of said second substrate, said first substrate protruding from said second substrate at both of a first area thereof along said first edge and a second area thereof along said second edge, said second substrate protruding from said first substrate at both of another first area thereof along said another first edge and another second area thereof along said another second edge, said first area and said second area being located on a surface of said first substrate which surface faces said second substrate, said another first area and said another second area being located on a surface of said second substrate which surface faces said first substrate,

a first set of elongated electrodes formed on said surface of said first substrate outside said first area with each of said electrodes being parallel to said first edge and extending into said second area at one end portion thereof,

a first set of terminals formed on said surface of said first substrate in said first area and arranged along said first edge of said first substrate, said first set of terminals being isolated from the electrodes on said first substrate,

a second set of elongated electrodes formed on said surface of said second substrate outside said another first area with each of said electrodes being parallel to said another first edge and extending into said another second area at one end portion thereof,

a second set of terminals formed on said surface of said second substrate in said another first area and arranged along said another first edge, said second set of terminals being isolated from the electrodes on said second substrate,

a first anisotropic conductive film interposed between said first substrate and said second substrate for connecting the other end portion of each electrode on said first substrate to each one of said terminals on said second substrate,

a second anisotropic conductive film interposed between said first substrate and said second substrate for connecting the other end portion of each electrode on said second substrate to each one of said terminals on said first substrate, and

liquid crystal material sealingly enclosed between said first substrate and said second substrate; and

said second panel element juxtaposed to said first panel element on the side of said another second edge of said first panel element with said another second area of said first panel element overlapping said first area of said second panel element; and

said third panel element juxtaposed to said first panel element on the side of said another first edge of said first panel element such that said another first area of said first panel element overlaps said second area of said third panel element;

a third anisotropic conductive film interposed between said second substrate of said first panel element and said first substrate of said second panel element for electrically connecting each of said first terminals of said second panel element to said one end portion of each electrode on said second substrate of said first panel element; and

a fourth anisotropic conductive film interposed between said second substrate of said first panel element and said first substrate of said third panel element for electrically connecting each of said second terminals of said first panel element to said one end portion of each electrode on said first substrate of said third panel element.

2. A liquid crystal display panel according to claim 1, wherein each of said first and second substrates is made of a polymer film.

3. A liquid crystal display panel according to claim 1, wherein said first substrate and said second substrate have a square shape respectively.

4. A liquid crystal display panel according to claim 1, wherein said first substrate has corners extending beyond said second substrate and said second substrate has corners extending beyond said first substrate, and at least one of said corners has a cutout portion.

5. A liquid crystal display panel according to claim 1, wherein each of said first to fourth anisotropic conductive films is a thermosetting anisotropic conductive resin containing conductive particles.