A device comprising a backplane comprising a plurality of backplane unit cells for driving light emitting elements in a display, each backplane unit cell comprising: a first switch configured to select a data signal based on a select signal, said first switch having a first terminal adapted to receive a data signal, a control terminal adapted to receive a select signal, and a second terminal adapted to output a selected data signal; a storage element coupled to the first switch and configured to store a value of the selected data signal in response to the data signal being selected by the first switch, said storage element having a first terminal connected to the second terminal of the first switch; a comparator coupled to the first switch and having a comparison input connected to the first terminal of the storage element and configured to generate an output based on a comparison of the value stored in the storage element to a value of a reference signal; a second switch coupled to the comparator and configured to receive the output of the comparator, said second switch having a control terminal connected to the output of the comparator, a first terminal adapted to receive a power signal and a second terminal; and a source connected to a second terminal of said second switch and configured to generate a drive signal to control light emission of a selected one of the light emitting elements in the display, the drive signal being based on the power signal, the source being a current source or a voltage source; the second switch being configured to select the power signal and provide as input to the source the power signal by selecting the power signal based on the output of the comparator, the device being characterized in that it is adapted to provide the reference signal and the power signal both as non-linear signals. a first switch configured to select a data signal based on a select signal, said first switch having a first terminal adapted to receive a data signal, a control terminal adapted to receive a select signal, and a second terminal adapted to output a selected data signal; a storage element coupled to the first switch and configured to store a value of the selected data signal in response to the data signal being selected by the first switch, said storage element having a first terminal connected to the second terminal of the first switch; a comparator coupled to the first switch and having a comparison input connected to the first terminal of the storage element and configured to generate an output based on a comparison of the value stored in the storage element to a value of a reference signal; a second switch coupled to the comparator and configured to receive the output of the comparator, said second switch having a control terminal connected to the output of the comparator, a first terminal adapted to receive a power signal and a second terminal; and a source connected to a second terminal of said second switch and configured to generate a drive signal to control light emission of a selected one of the light emitting elements in the display, the drive signal being based on the power signal, the source being a current source or a voltage source; the second switch being configured to select the power signal and provide as input to the source the power signal by selecting the power signal based on the output of the comparator, the device being characterized in that it is adapted to provide the reference signal and the power signal both as non-linear signals. <EOS>