Method and apparatus for enhancing transfer efficiency of electronic photograph development equipment

A transfer efficiency enhancement apparatus for enhancing a transfer efficiency by controlling a transfer voltage according to a transfer environment and a paper sheet recognition in electronic photograph development equipment, the transfer efficiency enhancement apparatus comprising:

• a high-impedance transfer roller;
• a paper sheet resistance recognizer recognizing a resistance of a sheet of paper;
• a lookup table in which optimal transfer voltages are tabulated according to a system resistance including the resistance of the sheet of paper of the paper sheet resistance recognizer;
• a transfer voltage generator generating a transfer voltage for the high-impedance transfer roller;
• an analog-to-digital converter analog-to-digital converting the transfer voltage fedback from the transfer voltage generator and outputting an analog-to-digital conversion value;
• a trigger point-in-time detector comparing the fedback transfer voltage with a trigger reference voltage and detecting a trigger point-in-time;
• and
• a microcomputer recognizing a current transfer environment by increasing the transfer voltage up to a predetermined value until a trigger is triggered before a sheet of paper is fed, recognizing a sheet of paper by applying the transfer voltage determined by recognition of the transfer environment to a leading end of the sheet of paper, in order to perform recognition and transfer of the sheet of paper, and referring to the lookup table to find out an optimal transfer voltage, and controlling the transfer voltage from the transfer voltage generator to the high-impedance transfer roller to be an optimal transfer voltage, in which the transfer voltage is controlled to become a first state if the ADC output value is large, but the transfer voltage is controlled to become a second state different from the first state if the ADC output value is small, based on an output value from an analog-to-digital converter (ADC) which is obtained in a result of the paper sheet recognition, and a switching unit connected to an output end of the transfer voltage generator, transferring the transfer voltage to the paper sheet recognizer by the trigger signal from the trigger point-in-time detector.

A transfer efficiency enhancement method for enhancing a transfer efficiency according to a transfer environment and a paper sheet recognition in electronic photograph development equipment, the transfer efficiency enhancement method comprising:

• detecting a system resistance by applying a voltage to a high-impedance transfer roller stepwise from a first voltage to a second voltage different from the first voltage until the system resistance is detected;
• determining a transfer voltage to be applied to a leading end of a sheet of paper using a predetermined lookup table to recognize resistance of the sheet of paper based on the system resistance;
• and
• determining a transfer voltage to be applied to the high-impedance transfer roller after having recognized the resistance of the sheet of paper by having applied the transfer voltage to the leading end of the sheet of paper.

A transfer efficiency enhancement method for improving a transfer efficiency in electronic photograph development equipment, the transfer efficiency enhancement method comprising:

• recognizing a system resistance by comparing a transfer voltage with a predetermined value and stepwise increasing the transfer voltage until a corresponding detected voltage reaches a predetermined value;
• evaluating the transfer efficiency by applying the transfer voltage, which corresponds to the detected voltage reaching the predetermined value, to a leading end of a sheet of paper to measure a resistance of the sheet of paper;
• and
• adjusting the transfer voltage according to both the system resistance and the resistance of the sheet of paper which is being fed.

A transfer efficiency enhancement apparatus for improving a transfer efficiency in electronic photograph development equipment, the transfer efficiency enhancement apparatus comprising:

• a high-impedance transfer roller;
• a lookup table in which optimal transfer voltage values are stored according to both a system resistance and resistances of sheets of paper;
• a transfer voltage generator generating a transfer voltage for the high-impedance transfer roller;
• a system resistance recognizer recognizing the system resistance by stepwise increasing the transfer voltage until a corresponding detected voltage reaches a predetermined value;
• a paper sheet resistance recognizer recognizing the resistance of one of the sheets of paper by applying the transfer voltage according to the system resistance to a leading end of the sheet of paper and measuring the corresponding detected voltage;
• and
• a controller adjusting the transfer voltage to an optimal transfer voltage through the transfer voltage generator according to both the system resistance and the resistance of the sheet of paper which is being fed based on optimal transfer voltage values stored in the look up table.

A storage medium for storing a computer implemented program for improving a transfer efficiency in electronic photograph development equipment, the transfer efficiency enhancement method comprising:

• recognizing a system resistance by comparing a transfer voltage with a predetermined value and stepwise increasing the transfer voltage until a corresponding detected voltage reaches a predetermined value;
• evaluating the transfer efficiency by applying the transfer voltage, which corresponds to the detected voltage reaching the predetermined value, to a leading end of a sheet of paper to measure a resistance of the sheet of paper;
• and
• adjusting the transfer voltage according to both the system resistance and the resistance of the sheet of paper which is being fed.