JPH0437953U

JPH0437953U -

Info

Publication number: JPH0437953U
Application number: JP8044490U
Authority: JP
Priority date: 1990-07-27
Filing date: 1990-07-27
Publication date: 1992-03-31

Description

[Brief explanation of the drawing]

第１図乃至第７図は、本考案の一実施例を説明
するための図面であり、第１図は本考案の実施例
に係るデジタルカラー複写機の概略構成図、第２
図はそのマニユアル制御ボードの概略図、第３ａ
図はフルカラーモードにおける各部の動作タイミ
ングを示すフローチヤート、第３ｂ図は単色モー
ドにおける各部の動作タイミングを示すフローチ
ヤート、第４図は電装部の概略構成を示すブロツ
ク図、第５図は第４図のＵＣＲ黒発生回路の構成
を示すブロツク図、第６図は画像信号の各色成分
の濃度を示すグラフ、第７図は制御装置の動作を
示すフローチヤートである。３０１……自動原稿判別手動色選択モードを選
択するモード選択キー、３０２乃至３０８……色
選択キー、５０……システムコントローラ、７３
……ＵＣＲ黒発生回路、８０……色識別回路。 1 to 7 are drawings for explaining one embodiment of the present invention, in which FIG. 1 is a schematic configuration diagram of a digital color copying machine according to an embodiment of the present invention, and FIG.
Figure 3a is a schematic diagram of the manual control board.
The figure is a flowchart showing the operation timing of each part in full color mode, Figure 3b is a flowchart showing the operation timing of each part in monochrome mode, Figure 4 is a block diagram showing the schematic configuration of the electrical equipment section, and Figure 5 is a flowchart showing the operation timing of each part in monochrome mode. FIG. 6 is a block diagram showing the configuration of the UCR black generation circuit shown in the figure, FIG. 6 is a graph showing the density of each color component of the image signal, and FIG. 7 is a flow chart showing the operation of the control device. 301...Mode selection key for selecting automatic document discrimination manual color selection mode, 302 to 308...Color selection key, 50...System controller, 73
...UCR black generation circuit, 80...color identification circuit.

Claims

[Claims for Utility Model Registration] A utility model comprising a plurality of developing devices each having a developer of a different color, and an automatic document discriminating means for discriminating whether the document is substantially monochrome, the automatic document discriminating means In a multicolor image forming apparatus that performs a monochrome image forming operation when the document is determined to be substantially monochrome, the automatic document discrimination means performs a monochrome image forming operation when the automatic document discrimination means determines that the document is substantially monochrome. 1. A multicolor image forming apparatus, comprising means for selecting in advance a developing device to be used in an image forming operation.