Organic light emitting diodes display and aging method thereof
View Patent ↗An organic light emitting diode display and an aging method thereof are presented. The method provides the organic light emitting diode display with improved reliability as a progressive dark defect is removed, and the lifetime and the white balance of the organic light emitting diode display is secured by executing an aging treatment of high luminance using a pixel circuit including an aging circuit for supplying the organic light emitting diode with an aging pulse.
1. An organic light emitting diode display, comprising:
an organic light emitting diode configured to emit light;
a driving transistor coupled to the organic light emitting diode;
a first storage capacitor comprising a first electrode coupled to a control electrode of the organic light emitting diode and a second electrode coupled to a first power source;
a first switching transistor comprising a first electrode coupled to a data line, a control electrode coupled to a scan line, and a second electrode coupled to a first electrode of the driving transistor; and
an aging circuit configured to supply the organic light emitting diode with an aging pulse;
wherein the aging circuit comprises an aging control switching transistor directly coupled to an anode of the organic light emitting diode and to an aging line.
2. The organic light emitting diode display as claimed in claim 1 , wherein the aging control switching transistor comprises a first electrode coupled to the aging line and a second electrode coupled to the anode of the organic light emitting diode.
3. The organic light emitting diode display as claimed in claim 2 , wherein the aging control switching transistor comprises a control electrode coupled to an aging gate line.
4. The organic light emitting diode display as claimed in claim 2 , wherein the aging control switching transistor comprises a control electrode coupled to the aging line.
5. The organic light emitting diode display as claimed in claim 1 , wherein an emission control switching transistor is coupled between the driving transistor and the organic light emitting diode, the emission control switching transistor comprising a control electrode coupled to an emission control line.
6. The organic light emitting diode display as claimed in claim 5 , wherein the aging control switching transistor comprises a control electrode coupled to the emission control line.
7. The organic light emitting diode display as claimed in claim 6 , wherein the aging control switching transistor has a different channel type as the channel type of the emission control switching transistor.
8. The organic light emitting diode display as claimed in claim 1 , wherein the organic light emitting diode comprises a cathode coupled to a second power source.
9. The organic light emitting diode display as claimed in claim 1 , wherein the driving transistor comprises a first electrode coupled to the first power source and a second electrode coupled to the anode of the organic light emitting diode.
10. The organic light emitting diode display as claimed in claim 1 , further comprising:
a second switching transistor configured to diode connect the driving transistor including a control electrode coupled to the scan line.
11. The organic light emitting diode display as claimed in claim 5 , further comprising:
a third switching transistor coupled between the first power source and the driving transistor, the third switching transistor comprising a control electrode coupled to the emission control line.
12. The organic light emitting diode display as claimed in claim 1 , further comprising:
a second storage capacitor including a first electrode coupled between the control electrode of the first switching transistor and the scan line and a second electrode coupled to the control electrode of the driving transistor.
13. The organic light emitting diode display as claimed in claim 1 , further comprising:
an initializing switching transistor coupled between the first electrode of the first storage capacitor and a third power source, the initializing switching transistor comprising a control electrode coupled to a previous scan line.
14. The organic light emitting diode display as claimed in claim 1 , wherein the aging line is coupled to an aging pulse supplier configured to supply the aging pulse.
15. The organic light emitting diode display as claimed in claim 1 , wherein the aging line is arranged in parallel direction with the data line.
16. The organic light emitting diode display as claimed in claim 1 , wherein the aging pulse comprises an alternating current pulse.
17. The organic light emitting diode display as claimed in claim 16 , wherein the aging pulse comprises a voltage level between 25V and −25V.