Organic light emitting display device including an organic light emitting diode connected to connection electrodes

• US 10,622,434 B2
• Filed: 07/12/2018
• Issued: 04/14/2020
• Est. Priority Date: 12/06/2017
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Choi, Sang Moo, Kim, Mi Hae, Seok, Sang Won, Jang, Hwan Soo, Lee, Su Jin
• Primary Examiner(s): Miller, Jami Valentine
• Application Number:
  US16/034,180
• Publication Number:
  US 20190172888A1
• Time in Patent Office: 642 Days
• Field of Search: 257 40
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0251 Precharge or discharge of pixel before applying new pixel voltage
• CPC Class Codes: G09G 2310/0262 The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3258 with pixel circuitry controlling the voltage across the light-emitting element
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: G09G 3/3291 in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
• CPC Class Codes: H10K 50/818 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals

Abstract

An organic light emitting display device includes a substrate having a display area and a peripheral area; a pad disposed on the substrate in the peripheral area; a first conductive pattern disposed on one side of the display area in the peripheral area and electrically connected to the pad; a second conductive pattern disposed on the substrate in the peripheral area and disposed on an opposite side of the first conductive pattern with the display area interposed between the first conductive pattern and the second conductive pattern; a first connection electrode disposed on the first conductive pattern in the peripheral area and electrically connected to the first conductive pattern; and a second connection electrode disposed on the second conductive pattern in the peripheral area and electrically connected to the second conductive pattern. A cathode electrode of an organic light emitting diode is disposed on the first and second connection electrodes and electrically connected to the first and second connection electrodes.

Claims

1. An organic light emitting display device comprising:

a substrate having a display area in which a plurality of pixels including an organic light emitting diode is arranged and a peripheral area surrounding the display area;

a pad disposed on the substrate in the peripheral area;

a first conductive pattern disposed on the substrate in the peripheral area adjacent to a first side of the display area and electrically connected to the pad;

a second conductive pattern disposed on the substrate in the peripheral area adjacent to a second side of the display area that is opposite from the first side of the display area in a plan view with the display area interposed between the first conductive pattern and the second conductive pattern;

a first connection electrode disposed on the first conductive pattern in the peripheral area and electrically connected to the first conductive pattern; and

a second connection electrode disposed on the second conductive pattern in the peripheral area and electrically connected to the second conductive pattern,

wherein a cathode electrode of the organic light emitting diode is disposed on the first connection electrode and the second connection electrode and electrically connected to the first connection electrode and the second connection electrode.

2. The organic light emitting display device of claim 1, wherein the first conductive pattern and the second conductive pattern are electrically connected through a plurality of conductive lines disposed to pass through the display area, and

wherein the plurality of conductive lines is disposed on the same layer as the first conductive pattern and the second conductive pattern.

3. The organic light emitting display device of claim 2, wherein an anode electrode of the organic light emitting diode is initialized to a voltage level provided to the conductive lines.

4. The organic light emitting display device of claim 2, wherein the conductive lines are formed of the same material as the first conductive pattern and the second conductive pattern.

5. The organic light emitting display device of claim 1, wherein the first conductive pattern and the first connection electrode are electrically connected through a first contact region, and

wherein the first contact region overlaps the first conductive pattern.

6. The organic light emitting display device of claim 5, wherein the second conductive pattern and the second connection electrode are electrically connected through a second contact region, and

wherein the second contact region overlaps the second conductive pattern.

7. The organic light emitting display device of claim 1, wherein the first connection electrode and the second connection electrode are disposed on the same layer as an anode electrode of the organic light emitting diode.

8. The organic light emitting display device of claim 7, wherein the first connection electrode and the second connection electrode are formed of the same material as the anode electrode of the organic light emitting diode.

9. The organic light emitting display device of claim 1, wherein the pad and the first conductive pattern are disposed at one end of the display area, and

wherein the second conductive pattern is disposed at an end opposite to the one end of the display area where the pad and the first conductive pattern are disposed.

10. The organic light emitting display device of claim 1, wherein each of the pixels further includes a driving transistor having a control electrode connected to a first node, a first electrode connected to a second node, and a second electrode connected to a third node, and

wherein the organic light emitting diode emits light according to a drain-source current flowing through the driving transistor.

11. The organic light emitting display device of claim 10, wherein the cathode electrode of the organic light emitting diode receives a first source voltage.

12. The organic light emitting display device of claim 11, wherein an anode electrode of the organic light emitting diode is initialized to the first source voltage.

13. The organic light emitting display device of claim 12, wherein a control electrode of the driving transistor is initialized to a first initialization voltage.

14. The organic light emitting display device of claim 13, wherein the first initialization voltage has a voltage level higher than the first source voltage.

15. The organic light emitting display device of claim 10, wherein the cathode electrode receives a first source voltage.

16. The organic light emitting display device of claim 15, wherein an anode electrode of the organic light emitting diode is initialized to the first source voltage.

17. An organic light emitting display device comprising:

a substrate having a display area in which a plurality of pixels including an organic light emitting diode are arranged and a peripheral area surrounding the display area;

a pad disposed on the substrate in the peripheral area and a conductive pattern electrically connected to the pad and disposed to surround the display area; and

a first connection electrode and a second connection electrode disposed on the conductive pattern in the peripheral area and electrically connected to the conductive pattern,

wherein a cathode electrode of the organic light emitting diode is disposed on the first connection electrode and the second connection electrode and electrically connected to the first connection electrode and the second connection electrode,

wherein the first connection electrode is disposed in the peripheral area adjacent to a first end of the display area in which the pad is disposed, and

wherein the second connection electrode is disposed in the peripheral area adjacent to a second end that is opposite to the first end of the display area in a plan view with the display area interposed between the first connection electrode and the second connection electrode.

18. The organic light emitting display device of claim 17, wherein the conductive pattern is electrically connected to a plurality of conductive lines disposed to pass through the display area, and

wherein the plurality of conductive lines is disposed on the same layer as the conductive pattern.

19. The organic light emitting display device of claim 17, wherein the conductive pattern and the first connection electrode are electrically connected through a first contact region,

wherein the conductive pattern and the second connection electrode are electrically connected through a second contact region, and

wherein the first contact region and the second contact region are spaced apart with the display area interposed between the first contact region and the second contact region and disposed to overlap the conductive pattern.

20. The organic light emitting display device of claim 17, wherein each of the pixels further includes a driving transistor having a control electrode connected to a first node, a first electrode connected to a second node, and a second electrode connected to a third node, and

wherein the organic light emitting diode emits light according to a drain-source current flowing through the driving transistor.