Dual emission display

Abstract

A dual emission display includes a first substrate, and a second substrate located on the first substrate. A first organic light emitting diode is disposed on the upper surface of the first substrate, and is completely covered by a first protecting layer. A second organic light emitting diode is disposed on the lower surface of the second substrate, and is completely covered by a second protecting layer. The first protecting layer and the second protecting layer are used to isolate these organic light emitting diodes from the oxygen and the moisture.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will now be specified with reference to its preferred embodiment illustrated in the drawings, in which

FIG. 1 is an dual emission display according to the prior art;

FIG. 2 is an first embodiment of the dual emission display according to the present invention;

FIG. 3 is the second embodiment of the dual emission display according to the present invention; and

FIG. 4 is the third embodiment of the dual emission display according to the present invention.

Claims

1. A dual emission display, comprising: a first substrate;a first organic light emitting diode disposed on the upper surface of the first substrate;a first protecting layer covering the entire surface of the first organic light emitting diode;a second substrate located on the first substrate;a second organic light emitting diode disposed on the lower surface of the second substrate; anda second protecting layer covering the entire surface of the second organic light emitting diode.

2. The dual emission display of claim 1, wherein the first protecting layer has a flat upper surface.

3. The dual emission display of claim 2, wherein the second protecting layer has a flat lower surface.

4. The dual emission display of claim 1, wherein at lease one of the first and second protecting layers is made of a material selected from the group consisting of silicon nitride, silicon oxide, and aluminum oxide.

5. The dual emission display of claim 1, wherein the first protecting layer is made of a plurality of films having at least one of a silicon oxide and a silicon nitride.

6. The dual emission display of claim 5, wherein the second protecting layer is made of a plurality of films having at least one of a silicon oxide and a silicon nitride.

7. The dual emission display of claim 1, wherein the first organic light emitting diode includes: a transparent electrode formed on the upper surface of the first substrate;an light emitting layer formed on the transparent electrode; anda reflective electrode formed on the light emitting layer.

8. The dual emission display of claim 1, wherein the second organic light emitting diode includes: a transparent electrode formed on the lower surface of the second substrate;an light emitting layer formed on the transparent electrode; anda reflective electrode formed on the light emitting layer.

9. A dual emission display, comprising: a first substrate;a first organic light emitting diode disposed on the upper surface of the first substrate;a first flat layer formed on the first organic light emitting diode;a first protecting layer covering the entire surface of the first flat layer;a second substrate located on the first protecting layer;a second organic light emitting diode disposed on the lower surface of the second substrate; anda second flat layer formed on the organic light emitting diode; anda second protecting layer covering the entire surface of the second organic light emitting diode.

10. The dual emission display of claim 9, wherein the first and second protecting layers are both made of a plurality of films having at least one of a silicon oxide and a silicon nitride.

11. The dual emission display of claim 10, wherein the silicon nitride of the first protecting layer is formed on the first flat layer, and the silicon nitride of the second protecting layer is formed on the second flat layer.

12. The dual emission display of claim 11, wherein the silicon oxide of the first protecting layer is formed on the silicon nitride, and the silicon oxide of the second protecting layer is formed on the silicon nitride.

13. The dual emission display of claim 12, further comprising an aluminum oxide film formed on the surface of the silicon nitride.

14. The dual emission display of claim 9, wherein at least one of the first and second flat layers has a flatness less than 5 μm.

15. The dual emission display of claim 9, wherein at least one of the first and second flat layers has a slope ranging from positive 60 degree to negative 60 degree.

16. The dual emission display of claim 9, wherein the first flat layer includes a polymer.

17. The dual emission display of claim 16, wherein the second flat layer includes a polymer.

18. The dual emission display of claim 9, wherein the first flat layer includes silicon oxide.

19. The dual emission display of claim 18, wherein the second flat layer includes silicon oxide.