Patent ID: 7557778

Claim:
Active-matrix image display device comprising: several light emitters forming an array of emitters distributed in rows and in columns, means for controlling the emission of the light emitters of the array, comprising: for each light emitter of the array, a current modulator capable of controlling the said emitter, and comprising a source electrode, a drain electrode, a gate electrode and a trip threshold voltage, column address means capable of addressing the emitters of each column of emitters by applying a data voltage to the gate electrode of their modulators in order to control them, row select means capable of selecting the emitters of each row of emitters by applying a select voltage, compensation means for compensating for the trip threshold voltage of each modulator, wherein: the compensation means comprise at least one operational amplifier, having an inverting input, a non-inverting input and an output terminal, and wherein: the non-inverting input of the operational amplifier is connected to a column address means controlling the said modulator, and the inverting input of the operational amplifier is connected to the source electrode of the said modulator, and the output of the operational amplifier being connected to the gate electrode of the said modulator, the said connections of the inverting input and of the output of this operational amplifier thus forming a feedback capable of compensating for the trip threshold voltage of the said modulator.