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Display device and method for driving the same

專利號(hào)
US10867559B2
公開日期
2020-12-15
申請(qǐng)人
Samsung Display Co., Ltd.(KR Yongin-si)
發(fā)明人
Jun Hyun Park; Cheol-Gon Lee; Yang-Hwa Choi
IPC分類
G09G3/3266; G09G3/3225; G09G3/3275; G09G3/3233
技術(shù)領(lǐng)域
voltage,transistor,elvdd,elvdd_l,first,node,scan,level,emission,light
地域: Yongin-si

摘要

A display device including: a scan driver that transmits scan signals to scan lines; a data driver that data signals to data lines; and a display portion that includes pixels, respectively connected to the corresponding scan lines and corresponding data lines, and displays an image by the pixels that simultaneously emit light according to the corresponding data signals, wherein each of pixels includes: an organic light emitting diode; a first transistor that includes a gate connected to a first node, and is connected between first power and an anode of the organic light emitting diode; a second transistor that includes a gate connected to a corresponding scan line and transmits the corresponding data signal to the first node; and a first capacitor that is connected to the first node, and stores a data voltage according to the data signal.

說(shuō)明書

Next, referring to FIG. 2 to FIG. 4, an example of a pixel included in the display device of FIG. 1 will be described.

FIG. 2 is a circuit diagram illustrating an example of a pixel included in the display device of FIG. 1. As shown in FIG. 2, a pixel PX-1 may include an organic light emitting diode OLED, a first transistor T1, a second transistor T2, a third transistor T3, a first capacitor Cst, and a second capacitor Cpr. The pixel PX-1 is representative and may be disposed at an i-th pixel row and a j-th pixel column.

The first transistor T1 may be a driving transistor. In the exemplary embodiment, the first transistor T1 may include a gate connected to a first node N1, a first end connected to the first power ELVDD, and a second end connected to an anode of the organic light emitting diode OLED.

The driving current is a current that corresponds to the voltage difference between the gate and the first end of the first transistor T1, and the driving current is changed corresponding to a data voltage based upon an applied data signal D[j].

The second transistor T2 may connect the first node N1 and a second node N2 according to a level of an i-th scan signal S[i]. In the exemplary embodiment, the second transistor T2 may include a gate connected to an i-th scan line Si, a first end connected to the first node N1, and a second end connected to the second node N2.

權(quán)利要求

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