Drive line wiring for liquid crystal display

• US 5,189,539 A
• Filed: 07/12/1991
• Issued: 02/23/1993
• Est. Priority Date: 07/12/1990
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Suzuki, Hiroshi
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): MAI, HUY KIM
• Application Number:
  US07/729,085
• Time in Patent Office: 592 Days
• Field of Search: 359/87, 359/88, 359/89
• US Class Current: 349/150
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: H05K 1/117 Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
• CPC Class Codes: H05K 2201/094 Array of pads or lands differing from one another, e.g. in size, pitch, thickness; Using different connections on the pads using different types of conductors H05K2201/0391
• CPC Class Codes: H05K 2201/10681 Tape Carrier Package [TCP]; Flexible sheet connector
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits

Abstract

A wiring arrangement suitable for use in a liquid crystal display wherein a series of first elements, such as pixels, are electrically connected to a series of second elements, such as connection electrodes by a series of leads. A minimum spacing permitted by packaging process considerations is maintained between the leads. The spacing between successive ones of the second elements increases as an end of the series of second elements is reached.

Claims

1. A wiring arrangement comprising;

a first series of n elements which are spaced at equal distances along a first line along a length L;

a second series of n elements which are spaced along a second line parallel to said first line along a length l, where l is shorter than L; and

n leads, each lead being for connecting one of said first series of elements to one of said second series of elements;

wherein a first spacing between successive pairs of said leads measured in a direction substantially perpendicular to a lead of said pair of leads, is constant from lead pair to lead pair; and

wherein a second spacing between successive pairs of said second series of elements becomes progressively larger towards at least one end of said second series of elements.

2. The arrangement of claim 1 wherein successive ones of said first series of elements are connected to successive ones of said second series of elements by successive ones of said leads.

3. The arrangement of claim 1 wherein spacing between successive ones of said second series of elements becomes progressively larger towards both ends of said second series of elements.

4. The arrangement of claim 1 where none of said leads cross one another.

5. The arrangement of claim 1 wherein said first spacing is selected so as to be no smaller than a minimum permitted spacing between said leads.

6. A liquid crystal display having a wiring arrangement comprising:

a first series of n elements which are spaced at equal distances along a first line along a length L;

a second series of n elements which are spaced along a second line parallel to said first line along a length l, where l is shorter than L; and

n leads, each lead being for connecting one of said first series of elements to one of said second series of elements;

wherein a first spacing between successive pairs of said leads, measured in a direction substantially perpendicular to a lead of said pair of leads, is constant from lead pair to lead pair; and

wherein a second spacing between successive pairs of said second series of elements becomes progressively larger towards at least one end of said second series of elements.

7. The liquid crystal display of claim 6 further comprising a display section, and wherein:

said first series of elements are elements of said display section; and

said second series of elements are connection electrodes formed on said display section.

8. The liquid crystal display of claim 7 further comprising a driving means for supplying driving signals for said display section;

and electrical connection means for electrically connecting said driving means to said series of electrodes.

9. The liquid crystal display of claim 8 wherein said driving means is an integrated circuit and said electrical connection means is a tape-like member, said integrated circuit being mounted on said member.

10. The liquid crystal display of claim 9, wherein said tape-like member is tape automated bonding material.

11. The liquid crystal display of claim 6 wherein each of said first series of elements is a liquid crystal display cell and each of said second series of elements is a connection electrode for said cell.

12. The liquid crystal display of claim 6 wherein successive ones of said first series of elements are connected to successive ones said second series of elements by successive ones of said leads.

13. The liquid crystal display of claim 6 wherein spacing between successive ones of said second series of elements becomes progressively larger towards both ends of said second series of elements.

14. The liquid crystal display of claim 6 where none of said leads cross one another.