Method and apparatus for forming image with feedback control of recording liquid

An image forming method for ejecting a mixed liquid constituted by a plurality of recording liquids from an ejection port while changing supply amounts of the respective recording liquids based on an image signal, and transporting the mixed liquid to an image receiving medium to form an image, said method comprising the steps of:

• determining a target value of a mixture proportion of said plurality of recording liquids based on said image signal;
• controlling the supply amounts of the respective recording liquids in such a manner that the mixture proportion of the recording liquids agrees with the target value;
• detecting an actual value of the mixture proportion in the vicinity of a confluent position of said plurality of recording liquids;
• and
• comparing the detected actual value with said target value to perform a feedback control of the supply amounts of the respective recording liquids in such a manner that there is no difference between both values;
• wherein the actual value of the mixture proportion is detected in the vicinity of a downstream side from the confluent position of the plurality of recording liquids;
• and
• wherein the amount of the mixed liquid contained in a channel from the confluent position to a detecting position of the actual value of the mixture proportion is not more than a capacity for one pixel.

An image forming method for ejecting a mixed liquid constituted by a plurality of recording liquids from an ejection port while changing supply amounts of the respective recording liquids based on an image signal, and transporting the mixed liquid to an image receiving medium to form an image, said method comprising the steps of:

• determining a target value of a mixture proportion of said plurality of recording liquids based on said image signal;
• controlling the supply amounts of the respective recording liquids in such a manner that the mixture proportion of the recording liquids agrees with the target value;
• detecting an actual value of the mixture proportion in the vicinity of a confluent position of said plurality of recording liquids;
• and
• comparing the detected actual value with said target value to perform a feedback control of the supply amounts of the respective recording liquids in such a manner that there is no difference between both values;
• wherein the actual value of the mixture proportion is obtained by separately detecting the supply amounts of the respective recording liquids on an upstream side of the confluent position of the plurality of recording liquids.

An image forming method for ejecting a mixed liquid constituted by a plurality of recording liquids from an ejection port while changing supply amounts of the respective recording liquids based on an image signal, and transporting the mixed liquid to an image receiving medium to form an image, said method comprising the steps of:

• determining a target value of a mixture proportion of said plurality of recording liquids based on said image signal;
• controlling the supply amounts of the respective recording liquids in such a manner that the mixture proportion of the recording liquids agrees with the target value;
• detecting an actual value of the mixture proportion in the vicinity of a confluent position of said plurality of recording liquids;
• and
• comparing the detected actual value with said target value to perform a feedback control of the supply amounts of the respective recording liquids in such a manner that there is no difference between both values;
• wherein an environmental state in the vicinity of said ejection port is detected, and the supply amounts of the respective recording liquids is corrected based on the detected environmental state.