DISPLAY DEVICE

• US 20080100789A1
• Filed: 10/31/2007
• Published: 05/01/2008
• Est. Priority Date: 10/31/2006
• Status: Active Grant

• Current Assignee: Citizen Watch Co Limited (Citizen Electronics Company Limited)
• Original Assignee: Citizen Holdings Co., Ltd.
• Inventors: Kamiya, Kiyoshi
• Granted Patent: US 7,911,560 B2
• Time in Patent Office: Days
• US Class Current: 349/149
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels

Abstract

The present invention provides a laminated liquid crystal display device having a configuration in which substrates for both panels can be electrically connected easily. The display device, which is implemented by multiple-layered liquid crystal cell panels configured by laminating a liquid crystal cell panel having a rigid panel substrate and a liquid crystal cell panel having a flexible panel substrate, makes use of the flexibility of the flexible panel substrate for making electrical connection between the flexible panel substrate and the rigid panel substrate. A part of the flexible panel substrate is protruded and, on this protrusion, electrode wire lines are provided for making electrical connection between the panel substrates. Bending the flexible panel substrate allows the electrode wire lines, formed on the protrusion, to be brought into contact with the rigid panel substrate.

Claims

1. A display device having multiple-layer liquid crystal cell panels configured by a first liquid crystal cell panel and a second liquid crystal cell panel which are stacked in layers, said first liquid crystal cell panel having a first opposed substrate laminated on a rigid first panel substrate with a liquid crystal layer between said first opposed substrate and said first panel substrate, said second liquid crystal cell panel having a second opposed substrate laminated on a flexible second panel substrate with a liquid crystal layer between said second opposed substrate and said second panel substrate wherein

at least a part of said second panel substrate is bent to allow said second panel substrate to be connected to electrodes formed on said first panel substrate.

2. The display device according to claim 1 wherein said first panel substrate has an extension portion formed by extending at least one end thereof beyond said first opposed substrate and said electrodes are formed on said extension portion.

3. The display device according to claim 2 wherein said second panel substrate has a protrusion, which is a part of said second panel substrate protruded from at least one end thereof, and electrode wire lines for making connection with said electrodes are provided on said protrusion and

said protrusion is bent to allow said electrode wire lines to be connected to said electrodes.

4. The display device according to claim 3 wherein

the electrodes of said first panel substrate are provided on a substrate face facing a first opposed substrate,

electrodes of said second panel substrate are provided on a substrate face facing a second opposed substrate,

the first liquid crystal cell panel and the second liquid crystal cell panel are laminated with said first opposed substrate and said second panel substrate opposed each other and

the protrusion of said second panel substrate is bent 180 degrees with respect to a protrusion direction thereof to turn inside out to allow leading positions of said electrode wire lines to be connected to the electrodes on the extension portion of said first panel substrate.

5. The display device according to claim 3 wherein

the electrodes of said first panel substrate are provided on a substrate face facing a first opposed substrate,

electrodes of said second panel substrate are provided on a substrate face facing a second opposed substrate,

the first liquid crystal cell panel and the second liquid crystal cell panel are laminated with said first opposed substrate and said second opposed substrate opposed each other and

the protrusion of said second panel substrate is bent with respect to a protrusion direction thereof without turning inside out to allow leading positions of said electrode wire lines to be connected to the electrodes on the extension portion of said first panel substrate.

6. The display device according to claim 1 wherein said first panel substrate is a glass substrate and said second panel substrate is a plastic substrate.

7. The display device according to claim 2 wherein said first panel substrate is a glass substrate and said second panel substrate is a plastic substrate.

8. The display device according to claims 3 wherein said first panel substrate is a glass substrate and said second panel substrate is a plastic substrate.

9. The display device according to claim 3 wherein the electrodes of said second panel substrate and the electrode wire lines provided on said protrusion are formed integrally with ITO (Indium Tin Oxide).

10. The display device according to claim 6 wherein the electrodes of said second panel substrate and the electrode wire lines provided on said protrusion are formed integrally with ITO (Indium Tin Oxide).

11. The display device according to claim 7 wherein the electrodes of said second panel substrate and the electrode wire lines provided on said protrusion are formed integrally with ITO (Indium Tin Oxide).

12. The display device according to claim 8 wherein the electrodes of said second panel substrate and the electrode wire lines provided on said protrusion are formed integrally with ITO (Indium Tin Oxide).

13. The display device according to claim 3 wherein said second liquid crystal cell panel is a cell panel configuring a viewing angle adjustment panel and said wire lines are two lines for controlling on/off states.

14. The display device according to claim 6 wherein said second liquid crystal cell panel is a cell panel configuring a viewing angle adjustment panel and said wire lines are two lines for controlling on/off states.

15. The display device according to claim 7 wherein said second liquid crystal cell panel is a cell panel configuring a viewing angle adjustment panel and said wire lines are two lines for controlling on/off states.

16. The display device according to claim 8 wherein said second liquid crystal cell panel is a cell panel configuring a viewing angle adjustment panel and said wire lines are two lines for controlling on/off states.

17. The display device according to claim 3 wherein said second liquid crystal cell panel is a cell panel configuring a touch entry panel and said wire lines includes two wire lines for controlling touch entry panel positions.

18. The display device according to claim 6 wherein said second liquid crystal cell panel is a cell panel configuring a touch entry panel and said wire lines includes two wire lines for controlling touch entry panel positions.

19. The display device according to claim 7 wherein said second liquid crystal cell panel is a cell panel configuring a touch entry panel and said wire lines includes two wire lines for controlling touch entry panel positions.

20. The display device according to claim 8 wherein said second liquid crystal cell panel is a cell panel configuring a touch entry panel and said wire lines includes two wire lines for controlling touch entry panel positions.