ACTIVE ORGANIC LIGHT-EMITTING DIODE COMPENSATION PIXEL CIRCUIT

The present invention relates to an active organic light-emitting diode compensation pixel circuit, and specifically, relates to an active organic light-emitting diode compensation pixel circuit capable of compensating for not only a change in luminance due to an area change caused by a stretching of a substrate, but also a change in luminance due to a voltage drop caused by an increase in resistance as the length of a wire increases. According to the present invention, by configuring a pixel circuit including an organic light-emitting diode (OLED) device, three switching transistors, one driving transistor, and two capacitors, a voltage applied to a gate of the driving transistor changes in proportion to the area of a display screen, to increase a current flowing through an organic light-emitting diode (OLED), such that a decrease in luminance due to a voltage drop of the power supply may be automatically compensated for while also compensating for a decrease in luminance. In addition, the present invention may be usefully applied to future display applications such as biomedical or automotive, Internet-of-things, and wearable electronic products, and when a change in luminance occurs due to partial stretching when attached to the body or when a stretchable display such as a window curtain is used, the change in luminance is compensated for, such that a stretchable display having uniform luminance may be implemented even though the area is increased, and a change in luminance due to a voltage drop caused by wire resistance may also be compensated for. La présente invention concerne un circuit de pixel de compensation de diode électroluminescente organique active, et plus particulièrement, concerne un circuit de pixel de compensation de diode électroluminescente organique active capable de compenser non seulement un changement de luminance dû à un changement de surface provoqué par un étirement d'un substrat, mais également un changement de luminance dû à une chute de tension provoquée par une augmentation de résistance lorsque la longueur d'un fil augmente. Selon la présente invention, en configurant un circuit de pixel comprenant un dispositif à diode électroluminescente organique (OLED), trois transistors de commutation, un transistor d'attaque, et deux condensateurs, une tension appliquée à une grille du transistor d'attaque change proportionnellement à la surface d'un écran d'afficheur, pour augmenter un courant circulant à travers une diode électrolu