METHODS AND DEVICES FOR ELECTROPHOTOGRAPHIC PRINTING

摘要

A printing device includes a developer (101, 201) for developing a latent image with toner particles (102); an imaging plate (100, 200, 300, 400, 500) comprising a plurality of pixel plates (105); and a plurality of voltage generators (109, 209, 211) connected respectively to the pixel plates (105). The voltage generators (109, 209, 211) positively bias selected pixel plates (105) to form a latent image that is developed with toner (102) from the developer (101, 201). Another printing device includes a developer (101, 201) for developing a latent image with toner particles (102); an imaging plate (100, 200, 300, 400, 500) comprising a plurality of pixel plates (105) for selectively receiving toner particles (102) from the developer (101, 201); a plurality of voltage generators (109, 209, 211) for biasing respective to pixel plates (105); and a background grid (106, 206, 306, 406) in the imaging plate (100, 200, 300, 400, 500) for preventing toner particles (102) from being deposited in areas between the pixel plates (105), wherein the background grid (106, 206, 306, 406) is connected to a voltage generator (109, 209, 211) for applying a range of biases, positive and negative to the background grid (106, 206, 306, 406). A method of electrophotographic printing in which toner particles (102) are moved electrostatically from a developer (101, 201) to develop a latent image includes positively biasing selected pixel plates (105) of a plurality of pixel plates (105) of an imaging plate (100, 200, 300, 400, 500) to form the latent image; and developing the latent image with the toner particles (102) from the developer (101, 201).