Patent ID: 8643685

Claim:
A system that facilitates forming a latent image on a photoreceptor, comprising: a thin-film transistor (TFT) array comprising a plurality of TFTs coupled to a ground plane; a charge generation layer deposited over the TFT array; a charge transport layer deposited over the charge generation layer; and a light source that applies light to the photoreceptor to photodischarge one or more pixels on the charge transport layer; wherein each TFT corresponds to a pixel of the charge transport layer; wherein the charge transport layer is charged with negative ions; and wherein the TFTs have a gate-to-source voltage (Vgs) that is adjustable to allow photodischarge of respective pixels coupled to the respective TFTs to form a latent image; and wherein one or more pixels is photodischarged to form the latent image on the charge transport layer by adjusting the gate-to-source voltage (Vgs) of one or more TFTs corresponding to the one or more pixels such that Vgs is greater than a predetermined threshold voltage (Vth), prior to application of light by the light source, wherein the voltage (Vgs) is applied to a gate electrode of respective TFTs by addressing the gate electrode from the inner side of the TFT; wherein the TFTs are configured to withstand a range of approximately 200V to 800V, while operating at the predetermined threshold voltage, by spacing the drain and source to attenuate the applied voltage down to the predetermined threshold voltage.