US 9,812,065 B2
Data driver, organic light emitting display device using the same, and method of driving the organic light emitting display device
Do Hyung Ryu, Yongin (KR); Bo Yong Chung, Yongin (KR); Hong Kwon Kim, Yongin (KR); and Oh Kyong Kwon, Yongin (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR); and Industry-University Cooperation Foundation Hanyang University, Seoul (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin, Gyeonggi-do (KR); and IUCF-HYU (Industry-University Cooperation Foundation Hanyang University), Seongdong-gu, Seoul (KR)
Filed on Jan. 8, 2014, as Appl. No. 14/150,614.
Application 14/150,614 is a division of application No. 11/501,245, filed on Aug. 7, 2006, granted, now 8,659,511.
Claims priority of application No. 10-2005-0073047 (KR), filed on Aug. 10, 2005; and application No. 10-2005-0073048 (KR), filed on Aug. 10, 2005.
Prior Publication US 2014/0125713 A1, May 8, 2014
Int. Cl. G09G 5/10 (2006.01); G09G 3/3291 (2016.01); G09G 3/3233 (2016.01)
CPC G09G 3/3291 (2013.01) [G09G 3/3233 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0852 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/0251 (2013.01); G09G 2320/0276 (2013.01); G09G 2320/043 (2013.01); G09G 2352/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An organic light emitting display device comprising:
a display region including a plurality of pixels coupled to scan lines, data lines, and emission control lines;
a scan driver for supplying scan signals to the scan lines and for supplying emission control signals to the emission control lines; and
at least one data driver for supplying predetermined currents to the data lines in a first period of each horizontal period to generate compensation voltages, for resetting values of gray scale voltages with reset values using the compensation voltages, and for generating data signals using the reset values of the gray scale voltages,
wherein a pixel from among the pixels is coupled to a current scan line and a previous scan line among the scan lines and a data line among the data lines, and the pixel comprises:
a first power source;
an organic light emitting diode for receiving a pixel current from the first power source;
a first transistor and a second transistor each having a first electrode coupled to the data line and turned on when one of the scan signals is supplied to the current scan line;
a third transistor coupled between a second electrode of the first transistor and a reference power source and turned on when another one of the scan signals is supplied to the previous scan line;
a fourth transistor for controlling the pixel current received by the organic light emitting diode having a first electrode coupled to the first power source; and
a fifth transistor coupled between a gate electrode and a second electrode of the fourth transistor and turned on when said another one of the scan signals is supplied to the previous scan line, when turned on, the fifth transistor conducting current to the fourth transistor so that the fourth transistor operates as a diode, and
wherein the data driver comprises:
a plurality of current sink units receiving the predetermined currents from the pixels in the first period of each horizontal period;
a plurality of voltage generators for resetting the values of the gray scale voltages using the compensation voltages generated when the predetermined currents flow;
a plurality of digital-to-analog converters for selecting one gray scale voltage among the gray scale voltages as a data signal in response to bit values of data supplied from an outside; and
a plurality of switching units for supplying the data signals to the data lines in a second period excluding the first period of each horizontal period.