Developing apparatus, developing method, image forming apparatus, image forming method and cartridge thereof

摘要

A developing device is provided. The developing device comprises a latent image supporter, wherein powder is adhered on the latent image supporter to develop a latent image on the latent image supporter; a transporting member arranged opposite to the latent image supporter; and a plurality of electrodes formed in the transporting member for generating a traveling-wave electric field to move the powder, wherein n-phase voltages are applied to the electrodes of the transporting member to form an electric field in a first direction so that the powder moves towards the latent image supporter at an image portion of the latent image and in a second direction so that the powder moves in a direction opposite to the latent image supporter at a non-image portion of the latent image.