Organic light emitting display and method of driving the same

• US 20060103611A1
• Filed: 11/16/2005
• Published: 05/18/2006
• Est. Priority Date: 11/17/2004
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Choi, Sang Moo
• Granted Patent: US 7,710,367 B2
• Time in Patent Office: Days
• US Class Current: 345/82
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2300/0819 used for counteracting undesired variations, e.g. feedback or autozeroing
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2300/0861 with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
• CPC Class Codes: G09G 2310/0224 Details of interlacing
• 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 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element

Abstract

An organic light emitting display including a scan driver for supplying scan signals to odd scan lines in an i^th frame and for supplying scan signals to even scan lines in an (i+1)^th frame, a data driver for supplying data signals corresponding to the scan signals, and an image display unit including a plurality of pixels coupled with the scan lines and the data lines. Pixels coupled with the odd scan lines do not emit light when the scan signals are supplied to the odd scan lines, and pixels coupled with the even scan lines do not emit light when the scan signals are supplied to the even scan lines.

Claims

1. An organic light emitting display, comprising:

a scan driver for sequentially supplying scan signals to odd scan lines in an i^th frame and for sequentially supplying scan signals to even scan lines in an (i+1)^th frame, i being a natural number;

a data driver for supplying data signals corresponding to the scan signals supplied to the odd scan lines in the i^th frame and for supplying data signals corresponding to the scan signals supplied to the even scan lines in the (i+1)^th frame, the data signals being supplied to data lines; and

an image display unit including a plurality of pixels coupled with the scan lines and the data lines,

wherein the scan driver supplies emission control signals to odd emission control signal lines so that pixels coupled with the odd scan lines do not emit light in a period where the scan signals are supplied to the odd scan lines, and

wherein the scan driver supplies emission control signals to even emission control signal lines so that pixels coupled with the even scan lines do not emit light in a period where the scan signals are supplied to the even scan lines.

2. The organic light emitting display of claim 1, wherein the scan driver does not supply the emission control signals to the even emission control signal lines so that the pixels coupled with the even scan lines emit light in the period where the scan signals are supplied to the odd scan lines, and

wherein the scan driver does not supply the emission control signals to the odd emission control signal lines so that the pixels coupled with the odd scan lines emit light in the period where the scan signals are supplied to the even scan lines.

3. The organic light emitting display of claim 1, wherein the scan driver does not supply the emission control signals to the odd and even emission control signal lines in a period, excluding the period in which the scan signals are supplied to the odd scan lines in the i^th frame.

4. The organic light emitting display of claim 1, wherein the scan driver does not supply the emission control signals to the odd and even emission control signal lines in a period, excluding the period in which the scan signals are supplied to the even scan lines in the (i+1)^th frame.

5. The organic light emitting display of claim 3, wherein all pixels included in the image display unit emit light in response to the data signals when the emission control signals are not supplied to the odd and even emission control signal lines.

6. The organic light emitting display of claim 4, wherein all pixels included in the image display unit emit light in response to the data signals when the emission control signals are not supplied to the even and odd emission control signal lines.

7. The organic light emitting display of claim 1, wherein a pixel comprises:

an organic light emitting diode (OLED);

a second transistor for supplying current to the OLED in accordance with a data signal;

a first transistor coupled with a scan line and a data line to transmit the data signal to the second transistor when a scan signal is supplied to the scan line;

a storage capacitor coupled with the second transistor to charge a voltage corresponding to the data signal;

a third transistor coupled with an emission control signal line to supply the current supplied from the second transistor to the OLED when an emission control signal is not supplied to the emission control signal line; and

a second power source coupled with a cathode of the OLED.

8. The organic light emitting display of claim 7, further comprising:

first power source lines coupled with pixels of odd horizontal lines;

second power source lines coupled with pixels of even horizontal lines;

a first power source coupled with the first power source lines; and

a third power source coupled with the second power source lines.

9. The organic light emitting display of claim 8, wherein the first power source and the third power source have substantially the same voltage value.

10. The organic light emitting display of claim 8,

wherein the pixels of the odd horizontal lines are coupled with the odd scan lines and the odd emission control signal lines, and

wherein the pixels of the even horizontal lines are coupled with the even scan lines and the even emission control signal lines.

11. The organic light emitting display of claim 7, further comprising:

first power source lines coupled with pixels of odd horizontal lines;

second power source lines coupled with pixels of even horizontal lines; and

a first power source coupled with the first power source lines and the second power source lines.

12. The organic light emitting display of claim 11,

wherein the pixels of the odd horizontal lines are coupled with the odd scan lines and the odd emission control signal lines, and

wherein the pixels of the even horizontal lines are coupled with the even scan lines and the even emission control signal lines.

13. The organic light emitting display of claim 7, wherein the pixel further comprises:

a fourth transistor coupled between a gate terminal and a second terminal of the second transistor, the fourth transistor being controlled by the scan signal;

a fifth transistor whose first terminal and gate terminal are coupled with a second terminal of the first transistor and whose second terminal is coupled with the gate terminal of the second transistor; and

a sixth transistor coupled between the second terminal of the first transistor and the storage capacitor, the sixth transistor being controlled by the emission control signal.

14. A method of driving an organic light emitting display, comprising:

supplying scan signals to odd scan lines in an i^th frame;

not emitting light from pixels coupled with the odd scan lines in a period where the scan signals are supplied to the odd scan lines;

supplying scan signals to even scan lines in an (i+1)^th frame; and

not emitting light from pixels coupled with the even scan lines in a period where the scan signals are supplied to the even scan lines,

wherein i is a natural number.

15. The method of claim 14, further comprising:

emitting light from the pixels coupled with the even scan lines in the period where the scan signals are supplied to the odd scan lines; and

emitting light from the pixels coupled with the odd scan lines in the period where the scan signals are supplied to the even scan lines.

16. The method of claim 14, further comprising:

emitting light from all pixels in a period, excluding the period in which the scan signals are supplied to the odd scan lines in the i^th frame.

17. The method of claim 14, further comprising:

emitting light from all pixels in a period, excluding the period in which the scan signals are supplied to the even scan lines in the (i+1)^th frame.

18. The method of claim 14, further comprising:

supplying data signals, corresponding to the scan signals supplied to the odd scan lines, to data lines in the i^th frame; and

supplying data signals, corresponding to the scan signals supplied to the even scan lines, to the data lines in the (i+1)^th frame.

19. A method of driving an organic light emitting display, comprising:

emitting light from first pixels in a period where scan signals are supplied in a first frame; and

emitting light from second pixels in a period where scan signals are supplied in a second frame,

wherein the first pixels and the second pixels are exclusive of each other.

20. The method of claim 19, wherein the scan signals supplied in the first frame are supplied to odd scan lines.

21. The method of claim 20, wherein the first pixels are coupled with even scan lines.

22. The method of claim 19, wherein the scan signals supplied in the second frame are supplied to even scan lines.

23. The method of claim 22, wherein the second pixels are coupled with odd scan lines.

24. The The method of claim 19, further comprising:

emitting light from the first pixels and the second pixels in response to data signals in a period, excluding the period in which the scan signals are supplied in the first and second frames.