Stacked display device with folded substrate

• US 6,501,528 B1
• Filed: 11/20/2000
• Issued: 12/31/2002
• Est. Priority Date: 11/26/1999
• Status: Expired due to Term

• Current Assignee: Casio Computer Company Limited
• Original Assignee: Casio Computer Company Limited
• Inventors: Hamada, Ryohei
• Primary Examiner(s): Ton, Toan
• Assistant Examiner(s): SCHECHTER, ANDREW M
• Application Number:
  US09/717,365
• Time in Patent Office: 771 Days
• Field of Search: 349/158, 349/160, 349/162, 349/12, 349/75-83, 349/73, 349/74, 345/4, 345/5
• US Class Current: 349/158
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels

Abstract

One intermediate substrate is disposed in one film substrate bent at a predetermined portion, one end side from a bent portion of the film substrate is made to oppose one surface of the intermediate substrate to construct a first panel, the other end side from the bent portion is made to oppose the other surface of the intermediate substrate to construct a second panel, and an edge portion on one side of the film substrate is made to project from the intermediate substrate. A plurality of terminal electrodes corresponding to first panel electrodes and second panel electrodes formed on both surfaces of the intermediate substrate and on the inner surfaces of the one end side and the other end side of the film substrate, which oppose the two surfaces of the intermediate substrate, respectively, are formed together at the edge portion.

Claims

1. A stacked display device comprising:

one first substrate having electrodes formed on both of a front surface and a rear surface;

one second substrate having a one-end-side portion opposing the front surface of said first substrate and the other-end-side portion opposing the rear surface of said first substrate, said second substrate having a first panel electrode assembly opposing the electrodes formed on the front surface of said first substrate, a second panel electrode assembly opposing the electrodes formed on the rear surface of said first substrate, and a plurality of terminal electrodes electrically connected to the first panel electrode assembly and/or the second panel electrode assembly;

a first connecting member which connects said first substrate and the one-end-side portion of said second substrate to construct a first panel;

a second connecting member which connects said first substrate and the other-end-side portion of said second substrate to construct a second panel; and

an electrooptic substance layer having an electrooptic effect and formed between said first substrate and said second substrate at least in one of the first and second panels.

2. A device according to claim 1, wherein said second substrate comprises a flexible film substrate bent at a predetermined portion and sandwiching said first substrate to cause the one-end-side portion and the other-end-side portion to oppose said first substrate.

3. A device according to claim 1, wherein said second substrate has an edge portion projecting from said first substrate on one of the one-end-side portion and the other-end-side portion.

4. A device according to claim 3, wherein the edge portion has the plurality of terminal electrodes.

5. A device according to claim 1, wherein the first panel electrode assembly comprises first panel electrodes opposing the electrodes formed on the front surface of said first substrate, and wiring members for connecting the first panel electrodes to corresponding electrodes of the terminal electrodes.

6. A device according to claim 5, wherein

the front surface of said first substrate has a plurality of terminal connections connected to the electrodes on the front surface, and

the first panel electrode assembly on said second substrate comprises a plurality of pad electrodes correspondingly connected to the plurality of terminal connections formed on the front surface of said first substrate, respectively, and wiring members for connecting the pad electrodes to corresponding electrodes of the terminal electrodes.

7. A device according to claim 1, wherein the second panel electrode assembly comprises second panel electrodes opposing the electrodes formed on the rear surface of said first substrate, and wiring members for connecting the second panel electrodes-to corresponding electrodes of the terminal electrodes.

8. A device according to claim 7, wherein

the rear surface of said first substrate has a plurality of terminal connections connected to the electrodes formed on the rear surface, and

the second panel electrode assembly on said second substrate comprises a plurality of pad electrodes correspondingly connected to the plurality of terminal connections formed on the rear surface of said first substrate, respectively, and wiring members for connecting the pad electrodes to corresponding electrodes of the terminal electrodes.

9. A device according to claim 1, wherein one of the first and second panels comprises a display panel having said electrooptic substance layer formed between said first and second substrates, and the other panel comprises a touch input panel.

10. A device according to claim 9, wherein said electrooptic substance layer comprises a liquid crystal layer.

11. A device according to claim 1, wherein both of the first and second panels comprise display panels each having said electrooptic substance layer formed between said first and second substrates.

12. A device according to claim 11, wherein said electrooptic substance layer comprises a liquid crystal layer.

13. A stacked display device comprising:

one intermediate substrate having electrodes formed on both of a front surface and a rear surface;

one flexible substrate bent at a predetermined portion and sandwiching said intermediate substrate with a one-end-side portion from the bent portion opposing the front surface of said intermediate substrate and the other-end-side portion from the bent portion opposing the rear surface of said intermediate substrate, one of the side portions having an edge portion projecting from said intermediate substrate, said flexible substrate having a first panel electrode assembly opposing the electrodes formed on the front surface of said intermediate substrate, a second panel electrode assembly opposing the electrodes formed on the rear surface of said intermediate substrate, and a plurality of terminal electrodes formed at the projecting edge portion and electrically connected to the first panel electrode assembly and/or the second panel electrode assembly;

a first connecting member which connects said intermediate substrate and the one-end-side portion of said flexible substrate to construct a first panel;

a second connecting member which connects said intermediate substrate and the other-end-side portion of said flexible substrate to construct a second panel; and

an electrooptic substance layer having an electrooptic effect and formed between said intermediate substrate and said flexible substrate at least in one of the first panel and second panel.

14. A device according to claim 13, wherein the first panel electrode assembly comprises first panel electrodes opposing the electrodes formed on the front surface of said intermediate substrate, and wiring members for connecting the first panel electrodes to corresponding electrodes of the terminal electrodes.

15. A device according to claim 14, wherein

the front surface of said intermediate substrate has a plurality of terminal connections connected to the electrodes on the front surface, and

the first panel electrode assembly formed on said flexible substrate comprises a plurality of pad electrodes correspondingly connected to the plurality of terminal connections formed on the front surface of said intermediate substrate, respectively, and wiring members for connecting the pad electrodes to corresponding electrodes of the terminal electrodes.

16. A device according to claim 13, wherein the second panel electrode assembly formed on said flexible substrate comprises second panel electrodes opposing the electrodes formed on the rear surface of said intermediate substrate, and wiring members for connecting the second panel electrodes to corresponding electrodes of the terminal electrodes.

17. A device according to claim 16, wherein

the rear surface of said intermediate substrate has a plurality of terminal connections connected to the electrodes on the rear surface, and

the second panel electrode assembly formed on said flexible substrate comprises a plurality of pad electrodes correspondingly connected to the plurality of terminal connections formed on the rear surface of said intermediate substrate, respectively, and wiring members for connecting the pad electrodes to corresponding electrodes of the terminal electrodes.

18. A device according to claim 13, wherein one of the first and second panels comprises a display panel having said electrooptic substance layer formed between said intermediate substrate and said flexible substrate, and the other panel comprises a touch input panel.

19. A device according to claim 13, wherein both of the first and second panels comprise display panels each having said electrooptic substance layer formed between said intermediate substrate and said flexible substrate.

20. A stacked display device constructed by stacking a first panel and a second panel, comprising:

one intermediate substrate;

one outer substrate having a one-end-side portion opposing front surface of said intermediate substrate and the other-end-side portion opposing the rear surface of said intermediate substrate;

a plurality of terminal electrodes formed at an edge portion on one side of said outer substrate;

a first panel electrode assembly formed on the front surface of said intermediate substrate and on an inner surface of the one-end-side portion of said outer substrate while making at least some parts oppose each other and connected to predetermined terminal electrodes of said plurality of terminal electrodes;

a second panel electrode assembly formed on the rear surface of said intermediate substrate and on an inner surface of the other-end-side portion of said outer substrate while making at least some parts oppose each other and connected to the remaining terminal electrodes of said plurality of terminal electrodes;

a first joint member which joints said intermediate substrate and the one-end-side portion of said outer substrate to construct the first panel;

a second joint member which joints said intermediate substrate and the other-end-side portion of said outer substrate to construct the second panel; and

an electrooptic substance layer having an electrooptic effect and formed between said intermediate substrate and said outer substrate at least in one of the first panel and second panel.