Organic light emitting diode display device with threshold voltage compensation
AssigneeLG Display Co., Ltd.
InventorJoongsun Yoon
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Abstract
An organic light emitting diode display device comprises: a plurality of pixels, wherein each of the pixels comprising: a driving TFT including a gate electrode coupled to a first node, a source electrode coupled to a second node, and a drain electrode coupled to a high-potential voltage source; an organic light emitting diode including an anode coupled to the second node and a cathode coupled to a low-potential voltage source; a first TFT in response to a first scan signal to connect the first node to a data line; a second TFT in response to a second scan signal to connect the first node to a first reference voltage source; a third TFT in response to an emission signal to connect the second node to the third node; and capacitors.
Claims22
An organic light emitting diode display comprising a display panel having a data line, a first scan line, a second scan line, and an emission line formed thereon and a plurality of pixels arranged in a matrix form, each of the pixels comprising:
- a driving thin film transistor (TFT) comprising a gate electrode directly coupled to a first node, a source electrode directly coupled to a second node, and a drain electrode coupled to a high-potential voltage source supplying a high-potential voltage;
- an organic light emitting diode comprising an anode directly coupled to the second node and a cathode coupled to a low-potential voltage source supplying a low-potential voltage;
- a first TFT that is turned on in response to a first scan signal of the first scan line to connect the first node to the data line;
- a second TFT that is turned on in response to a second scan signal of the second scan line to connect the first node to a first reference voltage source supplying a first reference voltage, the second TFT being directly coupled to the first node;
- a third TFT that is turned on in response to an emission signal of the emission line to connect the second node to a third node;
- a first capacitor directly coupled between the first node and the third node;
- and
- a second capacitor coupled between the third node and the first reference voltage source.
Dependencies are inferred from the claim text.