THIN FILM TRANSISTOR, AND PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE HAVING THE SAME
First Claim
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1. A thin film transistor, comprising:
- a semiconductor layer formed on a substrate;
a first electrode connected to a first region of the semiconductor layer;
a second electrode connected to a second region different from the first region of the semiconductor layer; and
a third electrode connected to a third region of the semiconductor layer different from the first region and the second region, wherein the third electrode is configured to apply a first voltage to the semiconductor layer through the third region.
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Abstract
A thin film transistor, a pixel, and an organic light emitting diode (OLED) display including the same are disclosed. The thin film transistor includes a connection to the channel region separate from connections to the source and drain.
50 Citations
25 Claims
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1. A thin film transistor, comprising:
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a semiconductor layer formed on a substrate; a first electrode connected to a first region of the semiconductor layer; a second electrode connected to a second region different from the first region of the semiconductor layer; and a third electrode connected to a third region of the semiconductor layer different from the first region and the second region, wherein the third electrode is configured to apply a first voltage to the semiconductor layer through the third region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pixel comprising:
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an organic light emitting diode (OLED); a driving transistor including; a source electrode and a drain electrode respectively connected to a source region and a drain region, a gate electrode connected to a gate metal layer formed separately from the semiconductor layer, and a bias electrode connected to a portion of a channel region of the semiconductor layer, wherein the driving transistor is configured to transmit a driving current according to a data signal to the organic light emitting diode (OLED); a switching transistor transmitting a data signal to the source electrode of the driving transistor corresponding to a first scan signal; an initialization transistor configured to apply an initialization voltage to the gate electrode of the driving transistor according to a second scan signal during an initialization period; an assistance transistor configured to apply an assistance voltage to the bias electrode of the driving transistor according to the second scan signal during the initialization period; and a storage capacitor including a first electrode connected to the gate electrode of the driving transistor and a second electrode connected to a first power source voltage. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An organic light emitting diode (OLED) display comprising:
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a display unit including a plurality of pixels connected to a plurality of scan lines transmitting a plurality of scan signals, a plurality of data lines transmitting a plurality of data signals, and a plurality of light emission control lines transmitting a plurality of light emission control signals; a scan driver transmitting a plurality of scan signals; a data driver transmitting a plurality of data signals, and a light emission driver transmitting a plurality of light emission control signals, wherein the plurality of pixels respectively comprise; an organic light emitting diode (OLED); a driving transistor including a source electrode and a drain electrode respectively connected to a source region and a drain region, a gate electrode connected to a gate metal layer formed separately from the semiconductor layer, and a bias electrode connected to a portion of a channel region of the semiconductor layer, wherein the driving transistor is configured to transmit a driving current according to a data signal to the organic light emitting diode (OLED); a switching transistor configured to transmit a data signal to the source electrode of the driving transistor corresponding to a first scan signal; an initialization transistor configured to apply an initialization voltage to the gate electrode of the driving transistor according to a second scan signal during an initialization period; an assistance transistor configured to apply an assistance voltage to the bias electrode of the driving transistor according to the second scan signal during the initialization period; and a storage capacitor including a first electrode connected to the gate electrode of the driving transistor and a second electrode connected to a first power source voltage. - View Dependent Claims (24, 25)
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Specification