Electrostatic image forming apparatus using field effect transistors

Abstract

Disclosed is an electrostatic image forming apparatus comprising a layer composed of a dielectric material or a photoconductor, image element electrodes arranged in the form of a matrix on one surface of said layer, field effect transistors affiliated with the image element electrodes and interposed between the image element electrodes, and a developing electrode arranged on the other surface of the dielectric material or photoconductor layer, to which a voltage is applied. In this electrostatic image forming apparatus, a toner image can be directly formed by a digital signal or image signal without performing any optical scanning or charging operation.

Dependencies are inferred from the claim text.