ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE HAVING AN INTEGRATED SECONDARY BATTERY AND METHOD OF FABRICATING THE SAME

• US 20080111493A1
• Filed: 11/06/2007
• Published: 05/15/2008
• Est. Priority Date: 11/10/2006
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung SDI Company Limited
• Inventors: Son, Hyun-Chul
• Granted Patent: US 7,863,629 B2
• Time in Patent Office: Days
• US Class Current: 315/169.3
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• 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 59/131 Interconnections, e.g. wiring lines or terminals

Abstract

An organic light emitting diode (OLED) display device and a method of fabricating the same are provided. An embodiment of the OLED display device comprises: a substrate; a secondary battery comprising a first electrode layer, a second electrode layer and an electrolyte layer interposed between the first and second electrode layers; a display panel comprising an array of organic light emitting diodes formed over the substrate, wherein the battery is interposed between the substrate and the display panel; and a power supply voltage line formed over the substrate and outside the display panel, wherein the power supply voltage line electrically interconnects the secondary battery and the display panel.

Claims

1. An organic light emitting diode (OLED) display device, comprising:

a substrate;

a secondary battery comprising a first electrode layer, a second electrode layer and an electrolyte layer interposed between the first and second electrode layers;

a display panel comprising an array of organic light emitting diodes formed over the substrate, wherein the battery is interposed between the substrate and the display panel; and

a power supply voltage line formed over the substrate and outside the display panel, wherein the power supply voltage line electrically interconnects the secondary battery and the display panel.

2. The OLED display device of claim 1, wherein at least one of the first and second electrode layers comprises an electrode collector sublayer and an electrode active material sublayer.

3. The OLED display device of claim 2, wherein the electrode collector comprises a material selected from the group consisting of stainless steel, nickel, copper, aluminum, and an alloy thereof.

4. The OLED display device of claim 2, wherein one of the first and second electrode layers is a negative electrode layer, and the electrode active material layer comprises one negative electrode active material selected from the group consisting of a carbon material, a lithium metal, and a lithium alloy.

5. The OLED display device of claim 2, wherein one of the first and second electrode layers is a positive electrode layer, and wherein the electrode active material layer comprises one positive electrode active material selected from the group consisting of LiCoO₂, LiNiO₂, LiMnO₂, LiMn₂O₄, and LiNi_1-x-yCo_xM_yO₂, wherein 0≦

x≦

1, 0≦

y≦

1, 0≦

(x+y)≦

1, and M is one selected from the group consisting of Al, Sr, Mg, and La.

6. The OLED display device of claim 2, wherein the electrode active material layer is located between the electrode collector and the electrolyte layer.

7. The OLED display device according to claim 1, wherein the electrolyte layer comprises a solid electrolyte.

8. The OLED display device of claim 7, wherein the solid electrolyte comprises LiPON.

9. The OLED display device of claim 1, further comprising an array of transistor circuits interposed between the secondary battery and the array of organic light emitting diodes.

10. The OLED display device of claim 1, further comprising a first insulating layer interposed between the secondary battery and the display panel.

11. The OLED display device of claim 1, wherein the first electrode layer, the second electrode layer and the electrolyte layer of the secondary battery extend substantially throughout and over the substrate.

20. A method of operating an OLED display device comprising:

providing the OLED display device of claim 1; and

applying electrical energy stored in the secondary battery so as to stimulate the array of the organic light emitting diodes to display an image on the display panel.

12. A method of fabricating an OLED display device, comprising:

providing a substrate;

forming a secondary battery over the substrate comprising a first electrode layer, a second electrode layer and an electrolyte layer interposed between the first and second electrode layers;

forming an array of transistor circuits over the secondary battery; and

forming an array of organic light emitting diodes over the array of transistor circuits.

13. The method of claim 12, wherein the first electrode layer comprises an electrode collector sublayer an electrode active material sublayer.

14. The method of claim 12, wherein the first electrode layer is a negative electrode layer comprising a negative electrode active material selected from the group consisting of a carbon material, a lithium metal, and a lithium alloy.

15. The method of claim 12, wherein the first electrode layer is a positive electrode layer comprising a positive electrode active material selected from the group consisting of LiCoO₂, LiNiO₂, LiMnO₂, LiMn₂O₄, and LiNi_1-x-yCo_xM_yO₂, wherein 0≦

x≦

1, 0≦

y≦

1, 0≦

(x+y)≦

1, and wherein M is one selected from the group consisting of Al, Sr, Mg, and La.

16. The method of claim 12, wherein the electrolyte layer is formed of a solid electrolyte.

17. The method of claim 16, wherein the solid electrolyte comprises LiPON.

18. The method of claim 12, wherein forming the array of transistors comprises:

forming a first insulating layer over the secondary battery;

forming a semiconductor layer over the first insulating layer in a first region;

forming a gate insulating layer over the semiconductor layer and the first insulating layer;

forming a gate electrode on the gate insulating layer over the semiconductor layer;

forming an interlayer insulating layer over the gate electrode and the gate insulating layer;

forming a first hole by etching the interlayer insulating layer and the gate insulating layer in the first region to partially expose the semiconductor layer;

forming a second hole by etching the interlayer insulating layer, the gate insulating layer, and the first insulating layer in a second region to partially expose the secondary battery;

forming a first conductive interconnect in the first hole so as to contact the semiconductor layer; and

forming a second conductive interconnect in the second hole so as to contact the secondary battery;

wherein before forming the gate insulating layer, a third hole is formed in the first insulating layer in the second region to partially expose the battery, and portions of the interlayer insulating layer and the gate insulating layer over the third hole are etched during the etching of the interlayer insulating layer and the gate insulating layer in the first region, to form the second contact hole.

19. The method of claim 12, further comprising:

forming at least one electrically insulating layer over the secondary battery;

forming a hole through the at least one electrically insulating layer to expose one of the first and second electrodes of the secondary battery;

forming an electrically conductive interconnect in the hole so as to contact the one of the first and second electrodes of the secondary battery; and

forming a wiring interconnecting the electrically conductive interconnect and the array of organic light emitting diodes.