US 9,812,062 B2
Display apparatus and method of driving the same
Hyungryul Kang, Yongin (KR); and Cheolmin Kim, Yongin (KR)
Assigned to Samsung Display Co., Ltd., Yongin, Gyeonggi-do (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin, Gyeonggi-Do (KR)
Filed on Jun. 10, 2015, as Appl. No. 14/735,484.
Claims priority of application No. 10-2014-0157334 (KR), filed on Nov. 12, 2014.
Prior Publication US 2016/0133191 A1, May 12, 2016
Int. Cl. G09G 3/32 (2016.01); G09G 3/3258 (2016.01)
CPC G09G 3/3258 (2013.01) [G09G 2300/043 (2013.01); G09G 2300/0871 (2013.01); G09G 2300/0876 (2013.01); G09G 2310/0216 (2013.01); G09G 2320/045 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A display apparatus, comprising:
a display unit including a plurality of pixels connected to a plurality of scan lines, a plurality of data lines, and a plurality of emission control lines, wherein each of the pixels includes:
an organic light-emitting diode (OLED);
a first transistor to transfer driving current, based on a data signal, to the OLED;
a second transistor to transfer the data signal to the first transistor based on a first scan signal having a gate-on voltage level during a data writing period;
a compensation transistor to diode-connect the first transistor based on the first scan signal having the gate-on voltage level during the data writing period;
a first capacitor connected between a gate electrode of the first transistor and a first power source; and
a second capacitor connected between a drain electrode of the first transistor and the first power source, wherein the first transistor is on-biased during an initialization period, wherein the first scan signal has the gate-on voltage level during a unit scan period before a unit scan period in which a second scan signal has the gate-on voltage level.
 
15. A method for driving a display apparatus, the method comprising:
initializing a characteristic of a driving transistor and setting the driving transistor in an on-biased state during an initialization period;
compensating for a threshold voltage of the driving transistor and transferring a data signal to the driving transistor based on a first scan signal; and
emitting light from the OLED based on driving current corresponding to the data signal, wherein initializing the characteristic includes:
transferring the first scan signal having a gate-on voltage level at least one time; and
transferring a second scan signal having the gate-on voltage level at least one time, wherein the first scan signal has the gate-on voltage level during a unit scan period before a unit scan period in which the second scan signal has the gate-on voltage level.