Patent ID: 6543881
Filing Date: 2003-04-08
Classification: B41J

Abstract:
A method of controlling a direct electrostatic printing apparatus to provide at least one print dot with multi-leveled print depth, the method of controlling a direct electrostatic printing apparatus comprising:providing an electrode device constructed by n electrode layers for representing (n+1) levels of a print depth, wherein n is an integer equal to or greater than two, and there is at least one aperture passing through the n electrode layers; and while printing a mth level of the (n+1) levels of the print depth, simultaneously applying a plurality of applied voltages with same magnitude individually to m electrode layers, which are selected from the n electrode layers, for a time period to generate a plurality of electric fields, thereby driving a charged particle passing through the at least one aperture from a cartridge device to be attached onto a recording medium, wherein m is an integer greater than zero, but not greater than n, and the plurality of applied voltages with zero volt are applied to the n electrode layers when m is zero, and the mth level of the print depth is the one selected from level zero to level n.