Patent ID: 7777738

Claim:
An active matrix display comprising a select driver (SD) for driving select electrodes (SE), a data driver (DD) for supplying data (D) to data electrodes (DE), a power supply (PS) for supplying a power supply voltage (VB), at least one power supply electrode (PE) for supplying the power supply voltage (VB) to pixel driving circuits (PD) of at least one line of pixels ( 10 ) extending in a same direction as the select electrodes (SE) and/or in a same direction as the data electrodes (DE), the pixels ( 10 ) being associated with intersections of the data electrodes (DE) and the select electrodes (SE), the pixels ( 10 ) comprising a light emitting element (L), and a pixel driving circuit (PD) for receiving the power supply voltage (VB) via the at least one power supply electrode (PE) and data (D) via the data electrodes (DE) to control a brightness of the light emitting element (L), means (LL) for determining a load (AL; MA; IL) on the at least one power supply electrode (PE), wherein the load (AL; MA; IL) is an image load indicating a ratio of the summed grey level of the pixels ( 10 ) associated with the at least one line of pixels ( 10 ) generating light and the maximum grey level of one of the pixels ( 10 ) multiplied by a total number of the pixels ( 10 ) associated with the at least one line of pixels ( 10 ), and means (CO) for controlling a level of the power supply voltage (VB) depending on the load (AL; MA; IL) determined.