Patent ID: 6187487
Filing Date: 2001-02-13
Classification: B82Y,H01J

Abstract:
A method for developing, with suitably triboelectrically-charged, dry powdered, screen structure material, an electrostatic latent charge image formed on a photoreceptor which is disposed on an interior surface of a faceplate panel of a CRT, using a developing apparatus comprisinga developing chamber having a sidewall closed at one end by a bottom portion and at the other end by a panel support having an opening therethrough to provide access to said faceplate panel;a panel grid in proximity to said interior surface of said faceplate panel;a tank grid disposed within said developing chamber and spaced from said sidewall, said bottom and said panel grid;a triboelectric gun for imparting a desired charge polarity to said screen structure material and for distributing said charged screen structure material onto said latent charge image;means, for monitoring the deposition of said charged screen structure material onto said latent charge image; andmeans for terminating the deposition of said charged screen structure material, wherein said method includes the steps ofoperating said panel grid at a first potential to control an electric field from said latent charge image andoperating said tank grid at a second potential, different from said first potential, to control the electrostatic forces within said developer tank.