IMAGE FORMING DEVICE

To shorten the time necessary for printing a density correction image and to enhance density correction precision. A density correction unit calculates, as a first density change rate, the rate of change in the density relative to a change in the degree of exposure on the basis of the difference bet...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	TAKI SEIJI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CINEMATOGRAPHY CORRECTION OF TYPOGRAPHICAL ERRORS ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES MAGNETOGRAPHY PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	To shorten the time necessary for printing a density correction image and to enhance density correction precision. A density correction unit calculates, as a first density change rate, the rate of change in the density relative to a change in the degree of exposure on the basis of the difference between the density of a first patch image and the density of the part of a reference patch image at the same position as the first patch image in the scanning direction, and calculates, as a second density change rate, the rate of change in the density relative to a change in the degree of exposure onthe basis of the difference between the density of a second patch image and the density of the part of the reference patch image at the same position as the second patch image in the scanning direction. The amount of light when forming the first patch image is less than a reference light amount, and the amount of light when forming the second patch image is greater than the reference light amount. The density correction