A method for developing an electrostatic latent charge image formed on a photoreceptor (36) which is disposed on an interior surface of a faceplate panel (12) of a CRT (10) utilizes a developer (40) having a developing chamber (42) with a sidewall (50) closed by a bottom end (44) and a panel support (46) at the other end. An opening (48) is formed through the panel support (46) to provide access to and support for the faceplate panel (12). A panel grid (74) is disposed in proximity to said interior surface of said faceplate panel (12) and operated at a first potential to control the electric field from the latent charge image. A tank grid (56) is disposed within said developer (40) and spaced from the sidewall (50), the bottom (44) and the panel grid (74). A triboelectric gun (84) is disposed within the developer (40) for imparting a desired charge polarity to the screen structure material and for distributing the charged screen structure material onto the latent charge image. An electrometer (66) and a phosphor deposition monitor (90) monitor the deposition of the charged screen structure material onto the latent charge image; and a controller (68) terminates the deposition of the charged screen structure material when sufficient material is deposited. The tank grid (56) is operated at a potential different from the potential on the panel grid (74) so that the tank grid (56) controls the electrostatic forces within the developer (40).
