| 摘要 |
An exemplary active matrix organic light emitting diode (OLED) display includes a data line, a current sensing line, a power line and a plurality of pixels all electrically coupled to the data line, the current sensing line and the power line. During a data current is writing to a selected one of the pixels, the selected pixel draws a current from the current sensing line, and the data line supplies a particular data voltage to the selected pixel according to the drawn current from the current sensing line until the drawn current matched with the data current; the other non-selected pixels draw currents from the power line for light-emission. Moreover, a pixel circuit and a data current writing method adapted for the above-mentioned active matrix OLED display also are provided. |
| 主权项 |
1. An active matrix organic light emitting diode display comprising:
a data line; a current sensing line; a power line; and a plurality of pixels directly coupled to the same data line, the same current sensing line and the same power line; wherein during a data current is writing to a selected one of the pixels, the selected pixel only draws a current from the current sensing line, the data line supplies a particular data voltage to the selected pixel according to the drawn current from the current sensing line until the drawn current from the current sensing line matches the data current, and the other non-selected pixels only draw currents from the power line for light-emission; wherein the selected pixel comprises: a driving transistor; a first switching transistor, the first source/drain of the first switching transistor being directly connected to the gate of the driving transistor, and the second source/drain of the first switching transistor being directly connected to the data line; a second switching transistor, the first source/drain of the second switching transistor being directly connected to the second source/drain of the driving transistor, and the second source/drain of the second switching transistor being directly connected to the power line; a third switching transistor, the first source/drain of the third switching transistor being directly connected to the second source/drain of the driving transistor, and the second source/drain of the third switching transistor being directly connected to the current sensing line; a storage capacitor; and an organic light emitting diode, a positive terminal of the organic light emitting diode being directly connected to the first source/drain of the driving transistor, and a negative terminal of the organic light emitting diode being directly connected to a predetermined potential; a compensation capacitor, the compensation capacitor having a first terminal and a second terminal, and the first terminal thereof being directly connected to the second source-drain of the driving transistor and the second terminal thereof being directly connected to the negative terminal of the organic light emitting diode wherein during the data current is writing to the selected pixel, the first switching transistor is turned ON and thereby the particular data voltage stores in the storage capacitor and controls the conduction status of the driving transistor, the second switching transistor is turned OFF, the third switching transistor is turned ON, and the organic light emitting diode draws the current from the current sensing line through the driving transistor and the third switching transistor. |
