Patent ID: 6151460
Filing Date: 2000-11-21
Classification: G03G

Abstract:
An image recording device, comprising:a recording unit developing an electrostatic latent image, formed on an electrically-charged body, into a toner visible image and transferring the toner visible image onto a recording sheet, thereby recording the toner visible image on the recording sheet;a developing bias voltage output circuit outputting a developing bias voltage to the recording unit;a toner fogging detection unit detecting a degree of toner fogging resulted by the recording unit, the toner fogging detection unit including a density sensor that detects a density of the recording sheet onto which the toner visible image has been recorded by the recording unit, the density sensor detecting the density on the recording sheet at a predetermined non-recorded region that is located outside of a region where toner visible images are recorded by the recording unit;a developing bias voltage control signal output unit automatically outputting a developing bias voltage control signal when the detected toner fogging degree determined by the detected density reaches a predetermined degree; anda developing bias voltage varying unit varying the developing bias voltage, to be outputted from the developing bias voltage output circuit, based on the developing bias voltage control signal.