Electro-optical display device with enlarged viewing area and single-sided driver connection

• US 5,680,192 A
• Filed: 06/23/1995
• Issued: 10/21/1997
• Est. Priority Date: 06/23/1995
• Status: Expired due to Term

• Current Assignee: Garmin Corporation (Garmin Limited)
• Original Assignee: Garmin Corporation (Garmin Limited)
• Inventors: Burrell, Jonathan C., Burrell, Gary L.
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): MILLER, CHARLES LELAND
• Application Number:
  US08/493,907
• Time in Patent Office: 851 Days
• Field of Search: 349/149, 349/150, 349/152, 359/271
• US Class Current: 349/152
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals

Abstract

An electro-optical display device having an improved connector arrangement. The display device includes a plurality of pixels arranged in commons and segments, with a lead trace associated with each commons and with each segment. These lead traces extend outward from an endmost commons to an edge of the device for subsequent connection to driving apparatus. The set of leads associated with the set of commons extends normally from such set of commons to the proximate edge of the device. The remaining set of leads, associated with the segments, is provided with lead traces which are redirected to also extend towards this same side of the device. As such, all leads for the device are accessible on a single side of the device. This may be accomplished by dividing the remaining set of commons in half, with each of these half-sets of leads being directed to a location on an associated side of the initial leads for the first set of commons. In this manner, a single connection is required between the device and the driving equipment, with such a connection typically being capable of formation by a low cost heat seal.

Claims

1. In an electro-optical display device comprised of an active viewing area, a contact area, and a transition area therebetween, said viewing area being surrounded by first and second opposed segment edges and first and second opposed common edges, said active viewing area containing a plurality of conductive segments extending between said opposed segment edges and containing a plurality of conductive commons extending between said opposed commons edges, said transition area containing a plurality of lead traces, each having a first end connected to an associated one of said commons and segments and a second end connected to an associated contact pad within the contact area, the improvement comprising:

said contact pads and contact area being located along one side edge of said display device proximate said first segment edge of the viewing area, said lead traces being separated into at least two groups, a first group of lead traces extending laterally outward at an acute angle from the contact area in a first direction toward said first commons edge, a second group of lead traces extending laterally outward at an acute angle from the contact area in a second direction, toward said second commons edge, wherein none of said lead traces within said transition area crossover one another.

2. The improvement of claim 1, wherein said contact pads are separated into first and second groups located within opposite halves of the contact area, each of said first and second groups being divided into first and second subgroups, wherein said first subgroups are located proximate one another near a center of the contact area and wherein said second subgroups are located remote from one another and proximate opposite ends of the contact area, said first and second subgroups being electrically connected to segments and commons, respectively.

3. The improvement of claim 1, wherein said lead traces within said first and second groups extend laterally outward from one another to form a nested V-shape arrangement of lead traces.

4. The improvement of claim 1, wherein contact pads connected to said commons are separated into two sections located at opposite ends of the contact area.

5. The improvement of claim 1, wherein said device includes first and second glass plates joined in a spaced relation to form the active viewing area thereupon, said first glass plate containing all of said contact pads along one edge thereof, said second glass plate containing all of the lead traces corresponding to said commons, thereon, wherein contact pads and lead traces corresponding to said commons are connected to transverse seal connectors extending between said first and second glass plates to electrically connect commons contact pads on said first glass plate with commons lead traces on said second glass plate.

6. The improvement of claim 1, wherein said device includes first and second glass plates joined in a spaced relation to form the active viewing area therebetween, said first glass plate containing all of the contact pads along one edge thereof and containing all of the lead traces corresponding to said segments, said second glass plate containing all of said lead traces corresponding to said commons, wherein none of the commons lead traces and segment lead traces overlap one another.

7. The improvement of claim 1, wherein said device further includes first and second glass plates joined in a spaced relation to form the active viewing area thereupon and having the contact area along one edge thereof, said device including transverse seal connectors extending between said first and second plates within the contact area, each of said transverse seal connectors being aligned with a corresponding contact pad to electrically connect a contact pad and lead trace upon opposite glass plates.

8. The improvement of claim 1, wherein each lead trace is constructed with a minimum width and is spaced from an adjacent trace with a minimum gap distance, said lead traces extending laterally outward from corresponding contact pads at a minimum acute angle with respect to a longitudinal axis of the viewing area, said minimum acute angle being based upon said minimum lead trace width and said minimum gap distance between adjacent lead traces.

9. The improvement of claim 1, wherein each contact pad is aligned at substantially a perpendicular angle to a corresponding edge of the device, and wherein each lead trace includes a transition section attached to a corresponding contact pad, said transition section extending laterally outward from said contact pad at an acute angle with respect to said edge of the device, said transition section being attached to a corresponding end of a corresponding one of said commons and segments.

10. The improvement of claim 1, wherein said electro-optical device utilizes transverse seal connectors within the contact area.

11. In an electro-optical display device of the type having an active viewing area surrounded by a peripheral sealing area spaced outward from the viewing area by a transition area, said active viewing area containing a plurality of conductive segments forming commons and segments, with each common and each segment having one end connected with a first end of an associated lead trace extending therefrom, each lead trace having a second end connecting with an associated contact pad, all of which are mounted along one peripheral edge and upon one side of the device, the improvement comprising:

said contact pads being separated into an intermediate and first and second outer sections, with the intermediate section containing contact pads corresponding to the segments and with the first and second sections containing contact pads corresponding to the commons, said lead traces for the commons extending along opposite sides of the viewing area, said lead traces for the segments extending peripherally outward toward said peripheral edge and being operatively connected to a first set of said contact pads corresponding to said one of said commons or said segments; and

said lead traces from the other of said commons or said segments being directed towards said set of said contact pads, and being operatively connected to at least a second set of said contact pads corresponding to said other of said commons or said segments, said at least second set of contact pads being arranged in proximity to, and as a continuation of, said first set of contact pads.

12. The improvement of claim 11, wherein said at least one peripheral edge comprises four peripheral edges, and wherein said sets of pads are arranged along a common one of said four edges.

13. The improvement of claim 12, wherein said one of said commons or said segments consists of a greater number of said commons or said segments than does said other of said commons or said segments.

14. The improvement of claim 12, wherein said common one of said edges extends substantially perpendicular to said one of said commons or said segments.

15. The improvement of claim 14, wherein said one of said commons or said segments consists of a greater number of said commons or said segments than does said other of said commons or said segments.

16. The improvement of claim 11, wherein said at least second set of contact pads comprises second and third sets of contact pads, and wherein said first set of contact pads is interposed between said second and third sets.

17. The improvement of claim 16, wherein said second and third sets of contact pads each correspond to, and are associated with, approximately half of said other of said commons or said segments.

18. An electro-optical display device comprising:

first and second viewing plates having a conductive seal sandwiched therebetween and extending about a periphery thereof, said plates containing an active viewing area surrounded by said conductive seal, said plates including a contact area along one edge thereof;

a plurality of contacts, within said contact area, all of said contacts being mounted upon said first plate;

a plurality of conductive segments etched on an inner side of said first plate and being located in said viewing area;

a plurality of segment traces etched on said inner side of said first plate, each of said segment traces extending from a corresponding segment to a corresponding segment contact, wherein all of said segment contacts are located proximate a center section of said contact area;

a plurality of conductive commons etched on an inner side of said second plate and being located within said viewing area;

a plurality of common traces etched on said inner side of said second plate, each of said common traces extending from a corresponding common to a corresponding common contact, said commons contacts being divided into first and second groups located in first and second outer sections of said contact area, said first and second outer sections being located upon either a plurality of enter section; and

a plurality of seal connectors located proximate said common contacts, said seal connectors interconnecting said corresponding common contacts and common traces.

19. An electro-optical display device according to claim 18, wherein said segment and common traces are arranged upon said first and second plates in a non-overlapping arrangement.

20. An electro-optical display device according to claim 18, wherein said segment traces are divided into first and second groups which extend laterally outward toward opposite sides of the contact area in a fanned arrangement to enable the viewing area to be located a minimum distance from the contact area.

21. An electro-optical display device according to claim 18, wherein the active viewing area is spaced from the contact area by a distance based on the following equation:

D=N×

(P_s -P_m)×

COT(COS^-1 (P_m /P_s)), wherein COS^-1 (P_m /P_s) represents the inverse cosine of the ratio P_m /P_s, D represents the distance between the active viewing area and the contact area, N represents a maximum number of commons on either side of the center section, P_s represents a minimum distance between corresponding edges of adjacent seal connectors, and P_m represents a minimum pitch between corresponding edges of adjacent segment traces.