Image Forming Apparatus Color Table Construction Timing Control
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Solution Overview
Problem
Existing image forming apparatuses face inefficiencies in image formation due to the need to suspend operations during color table construction based on detected recording materials, leading to increased processing time and potential errors from premature vertical synchronizing signal output.
Innovation Solution
The apparatus includes a recording material detecting portion and controlling portions that allow pre-notification of the expected recording material type, enabling advanced color table construction and synchronized image data output, thus avoiding unnecessary suspension and ensuring correct image formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the vertical synchronizing signal is output before color table construction is complete, then image data transmission can start earlier, but image formation errors occur due to premature output
Solution Approach 1:
The patent applies preliminary action by notifying the controller of the recording material type in advance before the material is detected and processed. This allows the color table construction to be initiated early, and the vertical synchronizing signal timing can be properly coordinated with the completion of color table construction, preventing premature signal output while minimizing waiting time.
2Reliability
If the image forming operation is suspended during color table construction, then accurate image formation is ensured, but processing time increases
Solution Approach 1:
By notifying the controller of the recording material type in advance, the color table construction can begin before the image forming operation starts. This eliminates the need to suspend the image forming operation waiting for color table construction, as the color table will be ready when needed, thus maintaining both accuracy and productivity.
Solution Approach 2:
The patent enables continuous operation by overlapping the color table construction process with the image forming preparation. The controller uses the advance notification to construct the color table in the background without interrupting the paper feeding or image forming operations, maintaining continuous useful action throughout the process.
3Speed
If the vertical synchronizing signal timing is not coordinated with color table construction completion, then faster processing is achieved, but image data output errors occur
Solution Approach 1:
The patent implements feedback by having the controller monitor the completion status of color table construction and use this information to determine the appropriate timing for outputting the vertical synchronizing signal. The controller receives feedback about color table readiness and adjusts the signal timing accordingly, ensuring accurate image data output while maintaining fast processing.
Data Source
AI summary
In an image forming apparatus constructing a color table corresponding to a kind of recording material, provided is an image forming apparatus which includes an engine controlling unit for outputting a vertical synchronizing signal in consideration of a time required for a controller to construct the color table. The engine controlling unit and the controller are included. The engine controlling unit notifies the controller of an assumed kind of recording material and the kind of recording material actually detected. When the two are not identical, the controller reconstructs the color table corresponding to the detected kind of recording material. The engine controlling unit does not output, to the controller, the vertical synchronizing signal for outputting image data during the time when the controller constructs the color table.