Patent ID: 9318540
Filing Date: 2016-04-19
CPC Classification: G06F,G09G,H01L

Claim Text:
1. A LED pixel unit circuit comprising a driving module and a LED, the driving module comprising a driving TFT, a first switching element, a second switching element, a first capacitor and a driving control unit, wherein a gate of the driving TFT is connected to a first node, a source of the driving TFT is connected to a positive voltage output terminal of a power source, and a drain of the driving TFT is connected to an anode of the LED; a cathode of the LED is connected to a negative voltage output terminal of the power source; the first capacitor is located between the first node and a second node as a first connection terminal of the driving control unit; the first switching element is connected between a third node as a second connection terminal of the driving control unit and a data line in series; the second switching element is connected between the positive voltage output terminal of the power source and the first node; and the driving control unit comprises a matching TFT whose threshold voltage is matched with the threshold voltage of the driving TFT, is located between the first switching element and the first capacitor, and is configured to control charging and discharging of the first capacitor so as to write the threshold voltage of the matching TFT and a new data voltage into the first capacitor while eliminating the original data voltage in the first capacitor, and thereby compensate for the threshold voltage of the driving TFT.