Organic electroluminescent display device in which an electromagnetic field preventing and protecting circuit is easily arranged
An organic electroluminescent display device in which electromagnetic field preventing and protecting circuit, for protecting internal circuits from abnormal signals having specific characteristics generated during manufacturing process or operation, is easily arranged by arranging said circuit on a junction (or coupling) region of a flexible printed circuit (FPC) and an input part. The organic electroluminescent display device includes a substrate, power supply lines and signal lines arranged on the substrate, an input part including input terminals and input lines, each said input line connected between a corresponding one of the power supply lines and the signal lines, and a corresponding one of the input terminals, and an FPC connected to the input terminals. The electromagnetic field preventing and protecting circuit is arranged on a region overlapping with the FPC.
1. An organic electroluminescent display device comprising a substrate; a plurality of power supply lines and signal lines arranged on the substrate; an input part comprising a plurality of input terminals and a plurality of input lines, each said input line connected between a corresponding one of the power supply lines or the signal lines and a corresponding one of the input terminals; and a flexible printed circuit connected to the input terminals, wherein an electromagnetic field preventing and protecting circuit is arranged on a region overlapping with the flexible printed circuit.
2. The organic electroluminescent display device according to claim 1 , wherein the electromagnetic field preventing and protecting circuit is arranged on a coupling region of the flexible printed circuit and the input part.
3. The organic electroluminescent display device according to claim 1 , wherein the electromagnetic field preventing and protecting circuit is connected between a first said input terminal connected to a first said input line, and a second said input line.
4. The organic electroluminescent display device according to claim 1 , wherein the electromagnetic field preventing and protecting circuit is connected between a first said input line and a second said input line.
5. The organic electroluminecent according to claim 1 , wherein the electromagnetic field preventing and protecting circuit is connected between a first said input terminal and a second said input terminal.
6. The organic electroluminescent display device according to claim 1 , wherein the electromagnetic field preventing and protecting circuit is a diode ring having a plurality of diode-connected thin film transistors.
7. The organic electroluminescent display device according to claim 1 , wherein the electromagnetic field preventing and protecting circuit is adapted to discharge a static electricity.
8. An organic electroluminescent display device comprising
a substrate having a pixel region formed thereon;
a plurality of power supply lines and signal lines arranged on the substrate and connected to the pixel region;
an input part including a plurality of input terminals, each coupled to a corresponding one of the power supply lines or the signal lines;
a flexible printed circuit connected to the input terminals; and
an electromagnetic field preventing and protecting circuit arranged on a junction region of the flexible printed circuit and the input part.
9. The organic electroluminescent display device of claim 8 , wherein the input part further comprises a plurality of input lines, each connected between the corresponding one of the power supply lines or the signal lines and a corresponding one of the input terminals.
10. The organic electroluminescent display device of claim 9 , wherein the elecetromagnetic field preventing and protecting circuit is connected between two of the input lines.
11. The organic electroluminescent display device of claim 9 , wherein the electromagnetic field preventing and protecting circuit is connected between one of the input lines and one of the input terminals.
12. The organic electroluminescent display device of claim 9 , wherein the electromagnetic field preventing and protecting circuit is connected between two of the input terminals.
13. The organic electroluminescent display device of claim 9 , wherein the length of the input lines is greater than the length of the input terminals.
14. The organic electroluminescent display device of claim 9 , wherein the length of the input terminals is greater than the length of the input lines.
15. The organic electroluminescent display device of claim 8 , wherein the electromagnetic field preventing and protecting circuit includes a plurality of diode-connected transistors arranged in a diode ring configuration.
16. A method of discharging a charge in an organic electroluminescent display device comprising a substrate having a pixel region formed thereon, a plurality of power supply lines and signal lines arranged on the substrate and connected to the pixel region, an input part including a plurality of input terminals, each said input terminal coupled to a corresponding one of the power supply lines or the signal lines, and a flexible printed circuit connected to the input terminals, the method comprising arranging an electromagnetic field preventing and protecting circuit on a junction region of the flexible printed circuit and the input part.
17. The method of claim 16 , further comprising connecting each of a plurality of input lines in the input part between the corresponding one of the power supply lines or the signal lines and a corresponding one of the input terminals.
18. The method of claim 17 , wherein said arranging comprises connecting the electromagnetic field preventing and protecting circuit between two of the input lines.
19. The method of claim 17 , wherein said arranging comprises connecting the electromagnetic field preventing and protecting circuit between one of the input lines and one of the input terminals.
20. The method of claim 17 , wherein said arranging comprises connecting the electromagnetic field preventing and protecting circuit between two of the input terminals.
21. The method of claim 16 , wherein said arranging comprises arranging a plurality of diode-connected transistors in a diode ring configuration.