US 9,812,061 B2
Display apparatus and operation method thereof
Li-Wei Liu, Hsin-Chu (TW); and Yi-Cheng Lin, Hsin-Chu (TW)
Assigned to AU OPTRONICS CORP., Hsin-Chu (TW)
Filed by AU OPTRONICS CORP., Hsin-Chu (TW)
Filed on Apr. 21, 2015, as Appl. No. 14/691,665.
Claims priority of application No. 104105852 A (TW), filed on Feb. 24, 2015.
Prior Publication US 2016/0247450 A1, Aug. 25, 2016
Int. Cl. G09G 3/3258 (2016.01); G09G 3/3233 (2016.01)
CPC G09G 3/3258 (2013.01) [G09G 3/3233 (2013.01); G09G 2300/0842 (2013.01); G09G 2300/0852 (2013.01); G09G 2300/0866 (2013.01); G09G 2310/0262 (2013.01); G09G 2320/0204 (2013.01); G09G 2320/0295 (2013.01); G09G 2320/043 (2013.01); G09G 2320/045 (2013.01); G09G 2330/028 (2013.01); G09G 2330/10 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A display apparatus, comprising:
a display unit, comprising at least a pixel unit, each pixel unit comprising:
a first transistor, having a first end, a second end and a control end, the first transistor being configured to have its first end for receiving a display data and its control end for receiving a first control signal, wherein the first transistor determines whether or not to output the display data to its second end according to the first control signal;
a second transistor, having a first end, a second end and a control end, the second transistor being configured to have its first end for receiving a power supply voltage and its control end electrically coupled to the second end of the first transistor;
a first capacitor, having a first end and a second end, the first capacitor being configured to have its first end electrically coupled to the second end of the first transistor and its second end electrically coupled to the first end of the second transistor;
a second capacitor, having a first end and a second end, the second capacitor being configured to have its first end electrically coupled to the second end of the second transistor and its second end for outputting a sensing voltage; and
an organic light emitting diode, having a first end and a second end, the organic light emitting diode being configured to have its first end electrically coupled to the second end of the second transistor and its second end electrically coupled to a first low-level voltage,
wherein when the pixel unit is operated in a display mode, the organic light emitting diode is ON, and the sensing voltage comprises a first parameter having characteristics of the second transistor and a second parameter having characteristics of the organic light emitting diode;
a source driver, electrically coupled to the at least one pixel unit and configured to receive a compensation data and accordingly adjust the next display data; and
a compensation unit, disposed between the second capacitor and the source driver and electrically coupled between the second end of the second capacitor and the source driver, wherein the compensation unit receives the sensing voltage and outputs the compensation data according to the received sensing voltage;
wherein when the pixel unit is operated in an initial mode, the display data has a second low-level voltage, the power supply voltage has a third low-level voltage which is lower than the second low-level voltage, the first and the second transistors are ON, and the organic light emitting diode is OFF; wherein when the pixel unit is operated in a compensation mode, the display data has the second low-level voltage, the power supply voltage has a high-level voltage which is higher than the second low-level voltage, the first and the second transistors are ON, and the organic light emitting diode is OFF.