Dual display device

• US 20050093767A1
• Filed: 10/28/2004
• Published: 05/05/2005
• Est. Priority Date: 10/30/2003
• Status: Abandoned Application

• Current Assignee: RITDISPLAY CORPORATION
• Original Assignee: RITDISPLAY CORPORATION
• Inventors: Chang, Yih, Lu, Tien Rong
• Application Number:
  US10/974,859
• Publication Number:
  US 20050093767A1
• Time in Patent Office: Days
• US Class Current: 345/1.1
• CPC Class Codes: H04M 1/0214 Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position combined with translation movement H04M1/0235
• CPC Class Codes: H04M 2250/16 including more than one display unit
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/128 comprising two independent displays, e.g. for emitting information from two major sides of the display
• CPC Class Codes: H10K 59/176 comprising two independent displays, e.g. for emitting information from two major sides of the display
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/874 including getter material or desiccant
• CPC Class Codes: H10K 59/877 comprising scattering means

Abstract

A dual display device comprised a transparent substrate, a first display area and a second display area. The first display area disposed over the transparent substrate comprises a plurality of pixels and at least one active driving circuit. The pixel of the first display area sequentially comprises a first electrode, at least one first organic functional layer and a second electrode. The active driving circuit drives the pixel of the first display area. The second display area disposed over the transparent substrate comprises a plurality of pixels and at least one passive driving circuit. The pixel of the second display area sequentially comprises a third electrode, at least one second organic functional layer and a fourth electrode. The passive driving circuit drives the pixel of the second display area. The light-emitting directions of the first and second display areas are the same or opposite to each other.

Claims

1. A dual display device, comprising:

a transparent substrate;

a first display area disposed over the transparent substrate comprises a plurality of pixels and at least one active driving circuit, wherein the pixel of the first display area sequentially comprises a first electrode, at least one first organic functional layer and a second electrode, and the active driving circuit drives the pixel of the first display area; and

a second display area disposed over the transparent substrate comprises a plurality of pixels and at least one passive driving circuit, wherein the pixel of the second display area sequentially comprises a third electrode, at least one second organic functional layer and a fourth electrode, the passive driving circuit drives the pixel of the second display area, and a light-emitting direction of the first display area is in an opposite light-emitting direction of the second display area.

2. The dual display device of claim 1, wherein the first display area is a top-emitting display area and the second display area is a bottom-emitting display area, or the first display area is a bottom-emitting display area and the second display area is a top-emitting display area.

3. The dual display device of claim 1, wherein the active driving circuit comprises at least one capacitor and at least two thin-film transistors.

4. The dual display device of claim 1, wherein the passive driving circuit drives the pixel of the second display area according to a column and row scan.

5. The dual display device of claim 1, further comprising:

at least one semi-reflecting layer, which is disposed over the corresponding first display area and/or the corresponding second display area.

6. The dual display device of claim 5, further comprising:

at least one insulating layer, which is disposed at a side of the semi-reflecting layer.

7. The dual display device of claim 1, further comprising:

a cover plate, which is disposed over the transparent substrate.

8. The dual display device of claim 7, further comprising:

a drying unit, which is disposed in a space formed by the cover plate and the transparent substrate.

9. The dual display device of claim 1, further comprising:

a transparent passivation layer, which disposes over the transparent substrate, the first display area and the second display area.

10. A dual display device, comprising:

a transparent substrate;

a first display area disposed over the transparent substrate comprises a plurality of pixels and at least one active driving circuit, wherein the pixel of the first display area sequentially comprises a first electrode, at least one first organic functional layer and a second electrode, and the active driving circuit drives the pixel of the first display area; and

a second display area disposed over the transparent substrate comprises a plurality of pixels and at least one passive driving circuit, wherein the pixel of the second display area sequentially comprises a third electrode, at least one second organic functional layer and a fourth electrode, the passive driving circuit drives the pixel of the second display area, and the light-emitting directions of the first display area and the second display area are the same.

11. The dual display device of claim 10, wherein the first display area is a top-emitting display area and the second display area is a top-emitting display area, or the first display area is a bottom-emitting display area and the second display area is a bottom-emitting display area.

12. The dual display device of claim 10, wherein the active driving circuit comprises at least one capacitor and at least two thin-film transistors.

13. The dual display device of claim 10, wherein the passive driving circuit drives the pixel of the second display area according to a column and row scan.

14. The dual display device of claim 10, further comprising:

at least one semi-reflecting layer, which is disposed over the corresponding first display area and/or the corresponding second display area.

15. The dual display device of claim 10, further comprising:

a cover plate, which is disposed over the transparent substrate.

16. The dual display device of claim 10, further comprising:

a transparent passivation layer, which disposes over the transparent substrate, the first display area and the second display area.

17. A dual display device, comprising:

a transparent substrate;

a first transparent display area disposed over the transparent substrate comprises a plurality of pixels and at least one active driving circuit, wherein the pixel of the first transparent display area sequentially comprises a first electrode, at least one first organic functional layer and a second electrode, and the active driving circuit drives the pixel of the first transparent display area; and

a second display area disposed over the transparent substrate comprises a plurality of pixels and at least one passive driving circuit, wherein the pixel of the second display area sequentially comprises a third electrode, at least one second organic functional layer and a fourth electrode, and the passive driving circuit drives the pixel of the second display area.

18. The dual display device of claim 17, wherein the second display area is a top-emitting display area, a bottom-emitting display area or a transparent display area.

19. The dual display device of claim 17, further comprising:

an image transform module, which controls the orientation of a displayed image according to a user'"'"'s eye.

20. The dual display device of claim 19, wherein the image transform module at least comprises a detector and an image controller.