ORGANIC ELECTROLUMINESCENCE LIGHTING APPARATUS

• US 20120007496A1
• Filed: 06/23/2011
• Published: 01/12/2012
• Est. Priority Date: 07/09/2010
• Status: Abandoned Application

• Current Assignee: Japan Display Central Incorporated (Japan Display Incorporated)
• Original Assignee: Toshiba Mobile Display Company Limited (Japan Display Incorporated)
• Inventors: MARUYAMA, Satoshi, OONUMA, Takahiro
• Application Number:
  US13/167,416
• Publication Number:
  US 20120007496A1
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/805 Electrodes

Abstract

In one embodiment, an organic EL lighting apparatus includes a pixel line, a cathode line extending in substantially parallel each other in an active area, and a plurality of light emitting pixels. The light emitting pixel includes an anode electrode electrically connected to the pixel line, a cathode electrode arranged on the anode electrode and a light emitting organic layer arranged between the anode electrode and the cathode electrode. A dot is arranged adjacent to the light emitting pixel for a contact of the cathode line with the cathode electrode.

Claims

1. An organic EL lighting apparatus, comprising:

a pixel line and a cathode line extending in substantially parallel each other in an active area;

a light emitting pixel including an anode electrode electrically connected to the pixel line, a cathode electrode arranged on the anode electrode and a light emitting organic layer arranged between the anode electrode and the cathode electrode; and

a dot arranged adjacent to the light emitting pixel for a contact of the cathode line with the cathode electrode.

2. An organic EL lighting apparatus, comprising:

an insulating substrate;

a pixel line and a cathode line arranged on the insulating substrate;

an insulating layer formed on the pixel line and the cathode line;

a first light transmitting electrode arranged on the insulating substrate and electrically connected with the cathode line through a first contact hole;

a second light transmitting electrode arranged on the insulating substrate and electrically connected with the pixel line through a second contact hole;

a reflective electrode arranged on the second light transmitting electrode;

a light emitting organic layer formed on the reflective layer; and

a cathode electrode arranged on the light emitting organic layer and contacting with the first light transmitting electrode.

3. The organic EL lighting apparatus according to claim 2, further comprising a rib, wherein the rib includes a first opening surrounding the first light transmitting electrode and a second opening surrounding the second light transmitting electrode and the reflective electrode, and the area of the first opening is substantially the same as that of the second opening.

4. An organic EL lighting apparatus, comprising:

a positive electric power supply pad and a negative electric power supply pad;

a plurality of pixel lines connected with the positive electric power supply pad and extending in a first direction in an active area;

a first cathode electrode contact electrically connected to the negative electric power supply pad and extending in a second direction orthogonally crossing the first direction in a substantially central portion of the active area; and

a light emitting pixel including an anode electrode electrically connected with the pixel line, a cathode electrode arranged on the anode electrode and contacting with the first cathode electrode contact, and a light emitting organic layer arranged between the anode electrode and the cathode electrode.

5. The organic EL lighting apparatus according to claim 4, further comprising a second cathode electrode contact extending in the first direction in the outside of the active area, wherein the first cathode electrode contact extends to the outside of the active area and contacts with the second cathode electrode contact.

6. The organic EL lighting apparatus according to claim 4, wherein the first cathode electrode contact is constituted by an aggregation of a dot in which the cathode line electrically connected with the negative electric power supply pad and extending in the first direction in the active area contacts with the cathode electrode.

7. An organic EL lighting apparatus, comprising:

a first electric power supply pad and a second electric power supply pad;

a first bus line electrically connected with the first electric power supply pad;

a second bus line electrically connected with the second electric power supply pad;

a first pixel line electrically connected with the first bus line;

a second pixel line electrically connected with the second bus line;

a first light emitting pixel including a first anode electrode connected with the first pixel line, a cathode electrode arranged on the first anode electrode, and a first light emitting organic layer for emitting a first color arranged between the first anode electrode and the cathode electrode; and

a second light emitting pixel including a second anode electrode connected with the second pixel line, a cathode electrode arranged on the second anode electrode and a second light emitting organic layer for emitting a second color arranged between the second anode electrode and the cathode electrode;

wherein the respective line resistances of the first bus line and the first pixel line, and the respective line resistances of the second bus line and the second pixel line are set so that a voltage drop in the first light emitting pixel becomes substantially the same as that of the second light emitting pixel.

8. The organic EL lighting apparatus according to claim 7, wherein the first light emitting pixel is formed of a blue color pixel for emitting blue color, and the second light emitting pixel is formed of a red color pixel for emitting red color or a green pixel for emitting green color, and the line width of the first pixel line is set to be a larger value than that of the second pixel line.

9. The organic EL lighting apparatus according to claim 7, wherein the first light emitting pixel is formed of a blue color pixel for emitting blue color, and the second light emitting pixel is formed of a red color pixel or a green pixel for emitting red color or green color, and the line width of the first bus line is set to be a larger value than that of the second bus line.

10. An organic EL lighting apparatus, comprising:

a first electric power supply pad and a second electric power supply pad;

a first bus line electrically connected with the first electric power supply pad;

a second bus line electrically connected with the second electric power supply pad;

a first pixel line electrically connected with the first bus line;

a second pixel line electrically connected with the second bus line;

a first light emitting pixel including a first anode electrode connected with the first pixel line, and

a second light emitting pixel including a second anode electrode connected with the second pixel line;

wherein a total load of the first bus line and the first pixel line in the first power supply pad is substantially the same as that of the second bus line and the second pixel line in the second power supply pad.

11. The organic EL lighting apparatus according to claim 10, wherein the number of the first pixel lines connected with the first bus line is equal to that of the second pixel lines connected with the second bus line.

12. An organic EL lighting apparatus, comprising:

a first electric power supply pad and a second electric power supply pad;

a first bus line and a second bus line;

a first connecting line for electrically connecting the first electric power supply pad with the first bus line;

a second connecting line for electrically connecting the second electric power supply pad with the second bus line;

a first pixel line electrically connected with the first bus line;

a second pixel line electrically connected with the second bus line;

a first light emitting pixel including a first anode electrode connected with the first pixel line, and

a second light emitting pixel including a second anode electrode connected with the second pixel line;

wherein the respective line resistances of the first connecting line and the second connecting line are set so that a voltage drop of the first connecting line becomes substantially the same as that of the second connecting line.

13. The organic EL lighting apparatus according to claim 12, wherein the line length of the first connecting line is set to be shorter than that of the second connecting line, and the line width of the second connecting line is set to be larger than that of the first connecting line.

14. An organic EL lighting apparatus, comprising:

a first electric power supply pad and a second electric power supply pad;

a first bus line electrically connected with the first electric power supply pad;

a second bus line electrically connected with the second electric power supply pad;

a first pixel line electrically connected with the first bus line;

a second pixel line electrically connected with the second bus line;

a first connecting line for electrically connecting the first electric power supply pad with the first bus line;

a second connecting line for electrically connecting the second electric power supply pad with the second bus line;

a first light emitting pixel including a first anode electrode connected with the first pixel line, a cathode electrode arranged on the first anode electrode, and a first light emitting organic layer for emitting a first color arranged between the first anode electrode and the cathode electrode; and

a second light emitting pixel including a second anode electrode connected with the second pixel line, a cathode electrode arranged on the second anode electrode and a second light emitting organic layer for emitting a second color arranged between the second anode electrode and the cathode electrode;

wherein the respective line resistances of the first bus line and the first pixel line, and the respective line resistances of the second bus line and the second pixel line are set so that a voltage drop in the first light emitting pixel becomes substantially the same as that of the second light emitting pixel, and

wherein the respective line resistances of the first connecting line and the second connecting line are set so that a voltage drop of the first connecting line becomes substantially the same as that of the second connecting line.

15. The organic EL lighting apparatus according to claim 14, wherein the first light emitting pixel is formed of a blue color pixel for emitting blue color, and the second light emitting pixel is formed of a red color pixel for emitting red color or a green pixel for emitting green color, and the line width of the first pixel line is set to be a larger value than that of the second pixel line.

16. The organic EL lighting apparatus according to claim 14, wherein the first light emitting pixel is formed of a blue color pixel for emitting blue color, and the second light emitting pixel is formed of a red color pixel or a green pixel for emitting red color or green color, and the line width of the first bus line is set to be a larger value than that of the second bus line.

17. The organic EL lighting apparatus according to claim 14, wherein the number of the first pixel lines connected with the first bus line is equal to that of the second pixel lines connected with the second bus line.

18. The organic EL lighting apparatus according to claim 14, wherein the line length of the first connecting line is set to be shorter than that of the second connecting line, and the line width of the second connecting line is set to be larger than that of the first connecting line.