Image forming apparatus and color tone density controlling method thereof
AssigneeS-Printing Solution Co., Ltd.
InventorsJung-woo Son, Suk-goo Kim, Jeong-tae Kim
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Abstract
A method of controlling a color-tone density (CTD) of an image forming apparatus including a plurality of developers configured to circularly perform a developing operation. The method includes developing test patches on an OPC sequentially from a developer to be developable preferentially, measuring CTDs of the developed test patches, and controlling a development variable using the measure CTDs.
Claims19
A method of controlling a color-tone density (CTD) of a multi-path type image forming apparatus having an organic photoconductor (OPC) and including a plurality of developers, the method comprising:
- determining whether a multicolor image to be printed on a paper or a plurality of monochrome test patches is to be developed on the OPC, the multicolor image being an image in which at least two monochrome images of different colors overlap with each other;
- developing the multicolor image or the plurality of monochrome test patches on the OPC based on the determining;
- and
- if the plurality of monochrome test patches are developed, measuring the CTD of the developed plurality of monochrome test patches, and controlling a development variable using the measured CTDs,
- wherein the plurality of developers perform the developing on the OPC according to a first order if the multicolor image is determined to be developed, and the plurality of developers perform the developing on the OPC according to a second order that is different from the first order if the plurality of monochrome test patches are determined to be developed.
A multi-path type image forming apparatus, comprising:
- an organic photo conductor (OPC);
- a plurality of developers configured to develop a multicolor image to be printed on a paper and a plurality of monochrome test patches on the OPC, the multicolor image being an image in which at least two monochrome images of different colors overlap with each other;
- a control unit configured to determine whether the multicolor image or the plurality of monochrome test patches is to be developed, and if the multicolor image to be printed is determined as being developed, to control the plurality of developers to perform developing on the OPC according to a first order, and if the plurality of monochrome test patches are determined to be developed, to control the plurality of developers to perform developing on the OPC according to a second order that is different from the first order;
- and
- a color-tone density (CTD) sensor configured to measure a CTD of each of the developed plurality of monochrome test patches.
A multi-path type image forming apparatus, comprising:
- an organic photo conductor (OPC);
- a plurality of developers;
- a position indicating member which is provided at a camshaft and has a plurality of indicators corresponding to the plurality of developers;
- a sensor unit configured to detect the plurality of indicators passing through the sensor unit;
- and
- a control unit configured to:
- control the camshaft to start rotating,
- control the plurality of developers to develop test patches on the OPC sequentially from a developer corresponding to an indicator detected first by the sensor unit since the camshaft starts rotating, and
- measure a color-tone density (CTD) of each of the developed test patches,
- wherein among the plurality of developers, a black (K) developer is the first to develop one of the test patches.
Dependencies are inferred from the claim text.