Aging Compensation System and Method for OLED Device

An aging compensation system for an OLED device, comprising:

• a plurality of pixel circuits, each pixel circuit comprising an OLED device and a driving transistor;
• a plurality of data lines;
• a plurality of sense lines, wherein number of sense lines is equal to number of the data lines, each of the sense lines being coordinated with each of the data lines in connection with the pixel circuits, wherein each of the sense lines, connected to an anode of the OLED device via a first transistor, senses a voltage VOLED of the OLED device;
• a first power supply connected to the driving transistor;
• a second power supply connected to a cathode of the OLED device between driving transistor and the second power supply;
• and
• a source driving chip connected to the data line and the sense line, to transmit an image voltage and to generate, based on the voltage VOLED of the OLED device, a compensation voltage for compensating for aging of the OLED device.

An aging compensation method for an OLED device being applied to an aging compensation system for the OLED device, the aging compensation system comprising:

• a plurality of pixel circuits, each pixel circuit comprising an OLED device and a driving transistor;
• a plurality of data lines;
• a plurality of sense lines, wherein number of sense lines is equal to number of the data lines, each of the sense lines cooperating with each of the data lines in connection with the pixel circuits, wherein each of the sense lines, connected to an anode of the OLED device via a first transistor, senses a voltage VOLED of the OLED device;
• a first power supply connected to the driving transistor;
• a second power supply connected to a cathode of the OLED device between driving transistor and the second power supply;
• a source driving chip, connected to the data line and the sense line, to transmit an image voltage and to generate, based on the voltage VOLED of the OLED device, a compensation voltage for compensating for aging of the OLED device;
• the aging compensation method comprising steps of:
• compensating both values of a Vth and a K of the driving transistor first, such that the pixels having a same color on a screen are provided with a same luminous current;
• acquiring a voltage VOLED when the OLED device is illuminated;
• using the acquired voltage VOLED of the OLED device as an index to map a lookup table for obtaining a current luminous efficiency η, and a value of the b acquired based on a formula:
• b=η/η0;
• generating a compensating voltage based on a formula:
• Vgs
• ″
• =
• K
• 
• 
• 0
• bK
• 
• 
• Vgs
• +
• Vth
• ;
• transmitting the compensating voltage to a gate of the driving transistor via the data line.