Liquid crystal display device and a method of manufacturing the same from a folded plastic sheet

• US 4,597,635 A
• Filed: 12/23/1983
• Issued: 07/01/1986
• Est. Priority Date: 12/23/1982
• Status: Expired due to Term

• Current Assignee: Epson Company Limited (Seiko Group)
• Original Assignee: Epson Company Limited (Seiko Group)
• Inventors: Hoshikawa, Jun
• Primary Examiner(s): Corbin, John K.
• Assistant Examiner(s): Gallivan, Richard F.
• Application Number:
  US06/565,258
• Time in Patent Office: 921 Days
• Field of Search: 350/331 R, 350/332, 350/333, 350/334, 350/339 R
• US Class Current: 349/73
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/1343 Electrodes reflective electrodes G02F1/133553
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 1/1347 Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

Abstract

A liquid crystal display device formed from a flexible substrate sheet having two driving electrode patterns disposed on one surface of the sheet is provided. The sheet is treated for orientation and folded along a fold line between the electrode patterns. The electrode patterns overlap in plan view when the sheet is folded to form the display device. One segment of the folded sheet extends beyond the other segment to form a terminal region for both electrode patterns.

Claims

1. A liquid crystal display device comprising a folded substrate sheet having an upper planar portion and an opposed lower planar portion spaced apart and parallel to each other and a fold line between the planar portions, a sealing material disposed about the perimeter of the opposed portions of the substate sheet for defining a space, liquid crystal material sealed in the space, each facing portion of the substrate sheet having cooperating electrode patterns formed thereon for applying a voltage therebetween across the liquid crystal material to render selected portions visually distinguishable from the remaining material, one of said electrode patterns on one of the opposed substrate portions extending about the fold line between the substrate portions to the edge of the other substrate portion.

2. The liquid crystal display device of claim 1, wherein one of the opposed portions of the substrate sheet extends further from the fold line than the other of said portion of the substrate sheet to define a terminal region, the electrodes on both opposed portions extending to the terminal region.

3. The liquid crystal display device of claim 2, wherein the electrode pattern on the opposed substrate portion extending further from the fold line is a signal electrode pattern and the electrode pattern on the other planar portion is a common electrode pattern, the common electrode pattern extending across the fold line to the terminal portion.

4. the liquid crystal display device of claim 3, wherein the electrode patterns on each opposed substrate portion extends substantially parallel to the fold line.

5. The liquid crystal display device of claim 1, wherein the opposed portions of the substrate sheet extend substantially longitudinally transverse to the fold line and one portion includes a terminal portion extending in the direction parallel to the fold line.

6. A liquid crystal display device comprising a folded substrate sheet of flexible material having two opposed, spaced apart and parallel portions and a folded portion therebetween, each parallel portion having transparent electrode patterns disposed thereon and a liquid crystal material disposed in the space between the portions, said folded portion having an inside diameter which is substantially equal to or greater than the thickness of said substrate sheet.

7. A liquid crystal display device comprising a folded substrate sheet of flexible material having two opposed, spaced apart and parallel portions and a folded portion defining a fold line therebetween, cooperating transparent electrode patterns disposed on the opposed portions and liquid crystal material disposed therebetween, the opposed surfaces of said substrate sheet treated for orientation in a single direction prior to folding to define the two opposed substrate portions, the direction of orientation on the surface of said substrate sheet being parallel to said fold line, and the direction of orientation of one parallel portion with respect to the other parallel portion being an angle of 180°

plus a multiple of 360°

.

8. A multi-layer liquid crystal display device comprising a folded substrate sheet having an upper planar portion and an opposed lower planar portion spaced apart and parallel to each other and at least one parallel intermediate planar portion with a fold line at each end of the intermediate portion to define at least two distinct liquid crystal cells with spaces between opposed planar portions, a sealing material disposed about the perimeter of the opposed portions of the subtrate sheet, liquid crystal material sealed in each space, each facing portion of the substrate sheet having cooperating electrode patterns formed therefor for applying a voltage therebetween across the liquid crystal material to render selected portions visually distinguishable from the remaining material, one of said electrode patterns on one of the facing substrate portions of each cell extending about the fold line between the substrate portions to the other opposed substrate portion.

9. The liquid crystal display device of claim 8, wherein there is one intermediate planar portion disposed between said upper and lower planar portion, said intermediate planar portion having electrodes on both side surfaces and defining a liquid crystal display device having two cells positioned along a line of sight.

10. The liquid crystal display device of claim 8, wherein there are two intermediate planar portions disposed between said upper and lower planar portions, said intermediate planar portions having electrodes defined on both sides thereof, and said planar portions defining a device having three liquid crystal display cells disposed along a line of sight.

11. A liquid crystal display device comprising a folded substrate sheet of flexible material having two opposed, spaced apart and parallel portions and a folded portion defining a fold line therebetween, said folded portion having an elongated opening therein extending along said folded portion, cooperating transparent electrode patterns disposed on the opposed portions and liquid crystal material disposed threbetween.

12. A liquid crystal display device comprising a folded substrate sheet of flexible material having two opposed, spaced apart and parallel portions and a folded portion defining a fold line therebetween, a support member having a cross section which is at least partially curved about which said substrate sheet is folded, cooperating transparent electrode patterns disposed on the opposed portions and liquid crystal material disposed therebetween.

13. The liquid crystal display device of claim 12, wherein said support member has a circular cross section.

14. The liquid crystal display device of claim 12, wherein the support member has an oval cross section.

15. The liquid crystal display device of claim 12, wherein the support member has a substantially triangular cross section with circular contours at corners of the cross section.

16. The liquid crystal display device of claim 12, wherein the support member has a cross section defined by a combination of a straight line and a curved line.

17. A liquid crystal display device comprising a folded substrate sheet of flexible material having two opposed, spaced apart and parallel portions and a folded portion defining a fold line therebetween, planes each defining a part of an outside surface of said parallel portions adjacent said folded portion, said folded portion projecting beyond only one said plane, cooperating transparent electrode patterns disposed on the opposed portions and liquid crystal material disposed therebetween.

18. A liquid crystal display device comprising a folded substrate sheet of flexible material having two opposed, spaced apart and parallel portions and a folded portion defining a fold line therebetween, a plane defining at least a portion of an outside surface of a first of the parallel portions adjacent the folded portion, cooperating transparent electrode patterns disposed on the opposed portions and liquid crystal material disposed therebetween, a polarizer affixed to the first parallel portion, the polarizer having an outer planar surface at a first distance from the plane, said first distance being greater than a second distance by which the folded portion extends beyond the plane.

19. A liquid crystal display device comprising a folded substrate sheet of flexible material having two opposed, spaced apart and parallel portions and a folded portion defining a fold line therebetween, cooperating transparent electrode patterns disposed on the opposed portions and liquid crystal material disposed therebetween, at least a portion of said electrode patterns being of a matrix type, a first part of at least one electrode of said electrode patterns being parallel to the folded portion and a second part of said at least one electrode of the electrode pattern being disposed at an angle with respect to the folded portion.

20. The liquid crystal display device of claim 19, wherein the second part of said electrode is curved.

21. The liquid crystal display device of claim 19, wherein the second part of said electrode is circular.

22. The liquid crystal display device of claim 19, further comprising a display area plated with an electroless nickel in regions of said display area removed from said electrode patterns.

24. The liquid crystal display device of claim 19, wherein at least one additional electrode of said electrode patterns extends in a direction perpendicular to said folded portion.

25. The liquid crystal display device of claim 19, wherein the second part of at least one electrode extends perpendicular to the folded portion.

26. The liquid crystal display device of claim 25, further comprising, at least one other electrode of the electrode patterns having a first part parallel to the folded portion and a second part perpendicular to the folded portion.

27. The liquid crystal display device of claim 26, wherein the portion of said electrode patterns defines a matrix display area.

28. The liquid crystal display device of claim 26, wherein the portion of said electrode patterns defines a matrix display area, said first part of said at least one electrode extends in a first direction from said display area and said first part of said at least one other electrode extends in a second direction from said display area, said second direction being opposite said first direction.

29. The liquid crystal display device of claim 28, further comprising, at least one additional electrode of said electrode pattern extending in a direction perpendicular to said folded portion, a part of said at least one additional electrode extending into said display area.

30. The liquid crystal display device of claim 19, wherein the portion of said electrode patterns defines a matrix display area, and the second part of the at least one elextrode extends perpendicular to the folded portion and about said fold line, further comprising at least one other electrode of the electrode patterns having a first part parallel to the folded portion and a second part extending perpendicular to the folded portion and about said fold line, the first part of the at least one electrode and the first part of the at least one other electrode extending into said display area.

23. A liquid crystal display device comprising a folded substrate sheet of flexible material having two opposed, spaced apart and parallel portions and a folded portion defining a fold line therebetween, a portion of said substrate being a polarizer, cooperating transparent electrode patterns disposed on the opposed portions and liquid crystal material disposed therebetween.