Image formation apparatus and registration method
AssigneeRicoh Company, Ltd.
InventorYoshiki Yoshida
Life of this patent
Estimating the term…
Abstract
One color is determined as a reference, and adjustment is carried out such that other color is matched with a detection signal generated from a synchronous detector of this color. Each control circuit of other color generates a mark pulse signal by determining an optional position based on a DP generated from each synchronous detector. A reference color control circuit receives a mark signal, and measures time relative to the reference. A CPU checks whether a result of this measurement coincides with a target value. The CPU changes the setting according to the difference, and repeats the measurement until when there is no difference, thereby obtains an adjustment value.
Claims17
An image formation apparatus comprising:
- a writing control unit that line scans an image holder in a predetermined period with optical beams emitted from a light source of which lighting is controlled corresponding to each image data of a plurality of colors, and forms one image by superimposing written images of respective colors;
- a synchronous detecting unit that detects each scanning optical beam and generates a writing reference synchronization signal;
- and
- a mark pulse generating unit that generates a mark pulse at a predetermined timing from the writing reference synchronization signal, wherein
- the writing control unit has
- a time measuring unit that measures a time from a writing reference signal generated in a color determined as a reference from among a plurality of colors to a mark pulse generated in other color, and
- a registration adjusting unit that adjusts a registration of each of other colors based on a change in a measured time when this change has occurred.
An image formation apparatus comprising:
- a writing control means for line scanning an image holder in a predetermined period with optical beams emitted from a light source of which lighting is controlled corresponding to each image data of a plurality of colors, and forms one image by superimposing written images of respective colors;
- a synchronous detecting means for detecting each scanning optical beam and generates a writing reference synchronization signal;
- and
- a mark pulse generating means for generating a mark pulse at a predetermined timing from the writing reference synchronization signal, wherein
- the writing control means has
- a time measuring means for measuring a time from a writing reference signal generated in a color determined as a reference from among a plurality of colors to a mark pulse generated in other color, and
- a registration adjusting means for adjusting a registration of each of other colors based on a change in a measured time when this change has occurred.
A registration adjusting method comprising the steps of:
- carrying out a writing control for line scanning an image holder in a predetermined period common to each with optical beams emitted from a light source of which lighting is controlled corresponding to each image data of a plurality of colors, and forming one image by superimposing written images of respective colors;
- generating a writing reference synchronizing signal by detecting each scanning optical beam in an operating state;
- generating each mark pulse at a predetermined timing from each generated writing reference synchronizing signal, and measuring a time from a writing reference signal generated in a color determined as a reference from among a plurality of colors to a mark pulse generated in other color;
- and
- adjusting a registration corresponding to a change in a measured time when this change has occurred.
Dependencies are inferred from the claim text.