IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0493982
(2012-06-11)
|
등록번호 |
US-9001009
(2015-04-07)
|
우선권정보 |
KR-10-2011-0064440 (2011-06-30) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Samsung Display Co., Ltd.
|
대리인 / 주소 |
Christie, Parker & Hale, LLP
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
1 |
초록
▼
A pixel includes an organic light emitting diode (OLED) having a cathode electrode coupled to a second power source, a first transistor having a first electrode coupled to a first power source, the first transistor being configured to control a magnitude of a current supplied from the first power so
A pixel includes an organic light emitting diode (OLED) having a cathode electrode coupled to a second power source, a first transistor having a first electrode coupled to a first power source, the first transistor being configured to control a magnitude of a current supplied from the first power source to the second power source via the OLED in accordance with a data signal, and a plurality of second transistors serially coupled between a gate electrode of the first transistor and a power source line, the second transistors being configured to be turned on when a second scan signal is supplied to a second scan line, wherein a common node between the second transistors is electrically coupled to the first electrode or a second electrode of the first transistor.
대표청구항
▼
1. A pixel comprising: an organic light emitting diode (OLED) having a cathode electrode coupled to a second power source;a first transistor having a first electrode coupled to a first power source, the first transistor being configured to control a magnitude of a current supplied from the first pow
1. A pixel comprising: an organic light emitting diode (OLED) having a cathode electrode coupled to a second power source;a first transistor having a first electrode coupled to a first power source, the first transistor being configured to control a magnitude of a current supplied from the first power source to the second power source via a second electrode of the first transistor and the OLED in accordance with a data signal; anda plurality of second transistors serially coupled between a gate electrode of the first transistor and a power source line, the second transistors being configured to be turned on when a second scan signal is supplied to a second scan line,wherein a common node between the second transistors is electrically coupled to the first electrode or the second electrode of the first transistor. 2. The pixel as claimed in claim 1, wherein the power source line supplies an initialization voltage, the initialization voltage having a voltage lower than a voltage of the data signal. 3. The pixel as claimed in claim 1, further comprising: a third transistor coupled between the first electrode of the first transistor and a data line, the third transistor being configured to be turned on when a first scan signal is supplied to a first scan line;a fourth transistor coupled between the gate electrode of the first transistor and the second electrode of the first transistor, the fourth transistor being configured to be turned on when the first scan signal is supplied to the first scan line;a fifth transistor coupled between the first electrode of the first transistor and the first power source, the fifth transistor being configured to be turned off when an emission control signal is supplied to an emission control line;a sixth transistor coupled between the second electrode of the first transistor and the OLED, the sixth transistor being configured to be turned off when the emission control signal is supplied; anda storage capacitor coupled between the gate electrode of the first transistor and the first power source. 4. An organic light emitting display, comprising: a scan driver configured to drive a plurality of first scan lines, a plurality of second scan lines, and a plurality of emission control lines;a data driver configured to supply a plurality of data signals to a plurality of data lines; anda plurality of pixels at crossing regions of the first scan lines and the data lines, the pixels being arranged in a plurality of horizontal lines,wherein each of the pixels in an ith horizontal line of the horizontal lines comprises: an OLED having a cathode electrode coupled to a second power source;a first transistor having a first electrode coupled to a first power source, the first transistor being configured to control a magnitude of a current supplied from the first power source to the second power source via a second electrode of the first transistor and the OLED in accordance with the data signal; anda plurality of second transistors serially coupled between a gate electrode of the first transistor and an ith power source line of a plurality of power source lines, the gate electrodes of the second transistors being coupled to an ith second scan line of the second scan lines,wherein a common node between the second transistors is electrically coupled to the first electrode or the second electrode of the first transistor. 5. The organic light emitting display as claimed in claim 4, wherein the ith power source line is configured to supply an initialization voltage, the initialization voltage having a voltage less than a voltage of the data signal. 6. The organic light emitting display as claimed in claim 4, wherein each of the pixels in the ith horizontal line further comprises: a third transistor coupled between the first electrode of the first transistor and a data line, the third transistor having a gate electrode coupled to an ith first scan line;a fourth transistor coupled between the gate electrode of the first transistor and the second electrode of the first transistor, the fourth transistor having a gate electrode coupled to the ith first scan line;a fifth transistor coupled between the first electrode of the first transistor and the first power source, the fifth transistor having a gate electrode coupled to an ith emission control line of the emission control lines;a sixth transistor coupled between the second electrode of the first transistor and the OLED, the sixth transistor having a gate electrode coupled to the ith emission control line; anda storage capacitor coupled between the gate electrode of the first transistor and the first power source. 7. The organic light emitting display as claimed in claim 4, wherein an ith (i is a natural number) second scan line of the second scan lines is electrically coupled to an (i−1)th first scan line of the first scan lines. 8. The organic light emitting display as claimed in claim 4, wherein the scan driver is configured to sequentially supply a plurality of first scan signals to the first scan lines and a plurality of second scan signals to the second scan lines to turn on corresponding ones of the transistors and to sequentially supply a plurality of emission control signals to the emission control lines to turn off corresponding ones of the transistors. 9. The organic light emitting display as claimed in claim 8, wherein the scan driver is further configured to supply a second scan signal to an ith (i is a natural number) second scan line, wherein the second scan signal does not overlap a first scan signal supplied to an ith first scan line, wherein the second scan signal has a larger width than the first scan signal and is supplied to the ith second scan line before the first scan signal is supplied to the ith first scan line. 10. The organic light emitting display as claimed in claim 9, wherein the scan driver is configured to supply an emission control signal to an ith (i is a natural number) emission control line, wherein the emission control signal overlaps with the first scan signal and the second scan signal supplied to the ith first scan line and the ith second scan line, respectively. 11. The organic light emitting display as claimed in claim 4, wherein one of the power source lines is formed in each horizontal line of the display and each of the power source lines is coupled to an initialization power source driver configured to drive the power source lines of the horizontal lines. 12. The organic light emitting display as claimed in claim 11, wherein the scan driver is configured to sequentially supply a first scan signal to each of the first scan lines, to sequentially supply two second scan signals to each of the second scan lines, and to sequentially supply an emission control signal to each of the emission control lines. 13. The organic light emitting display as claimed in claim 12, wherein the scan driver is configured to supply a first scan signal to an ith (i is a natural number) first scan line after supplying the second scan signals to the ith second scan line, wherein the two second scan signals comprise a first second scan signal and a second second scan signal. 14. The organic light emitting display as claimed in claim 13, wherein the scan driver is configured to supply an emission control signal to an ith emission control line and wherein the emission control signal overlaps the first scan signal supplied to the ith first scan line and the second second scan signal supplied to the ith second scan line. 15. The organic light emitting display as claimed in claim 13, wherein the initialization power source driver is configured to supply an initialization voltage having a voltage lower than a voltage of the data signal, the initialization voltage being supplied to the ith power source line to overlap the second second scan signal supplied to the ith second scan line. 16. The organic light emitting display as claimed in claim 15, wherein the ith power source line is set in a floating state in periods other than a period in which the initialization power source is supplied. 17. The organic light emitting display as claimed in claim 13, wherein the scan driver is configured to supply the second second scan signal to the ith second scan line no less than one horizontal period 1H after the end of the first second scan signal.
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