PIXEL CIRCUIT, METHOD FOR DRIVING THE SAME, ARRAY SUBSTRATE, DISPLAY DEVICE
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United States of America Patent
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Issued Date -
May 28, 2015
app pub date -
May 4, 2013
filing date -
Mar 20, 2013
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Abstract
A pixel circuit and method for driving the same, an array substrate, and a display device are provided, wherein the pixel circuit includes a driving transistor (DTFT), a first switching transistor (M1), a storage capacitor (C1) and a light emitting device and a threshold compensating circuit; the threshold compensating circuit includes a second switching transistor (M2), a third switching transistor (M3), a fourth switching transistor (M4) and a coupling capacitor (C2), which is capable of compensating for non-uniformity of threshold voltage of the driving transistor (DTFT) effectively. The method for driving the pixel circuit includes a pre-charging phase (C), a compensating phase (D) and a light emitting phase (E). The array substrate includes the above-described pixel circuit and thus has a more stable performance. The display device includes the above-described array substrate, and thus uniformity of picture displayed on the display device is improved significantly.
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