Recording-material type determination apparatus and method and image forming apparatus
a technology of type determination and recording material, applied in the direction of electrographic process apparatus, instruments, using optical means, etc., can solve the problems of reducing the cost-effectiveness of image forming apparatus, taking a very long calculation time, and increasing the scale of the circuit, so as to achieve stable image quality
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example 1
[0031]FIG. 1 is a block diagram showing configuration of a “recording-material type determination apparatus” according to a first example.
[0032]First, with reference to FIG. 1, description will be given of a control circuit block which performs first calculation and second calculation and determines the type of recording material.
[0033]In the figure, reference numeral 701 denotes a CPU which serves as a determination part, 702 denotes a control circuit, 703 denotes a CMOS area sensor, 704 denotes an interface control circuit, 705 denotes a calculation circuit, 706 denotes a register A which stores results of calculation on the amount of irregularities in the surface of recording material carried out by first calculation means (means of calculating the depth of irregularities in the surface of recording material), 707 denotes a register B which stores results of calculation on the edge amount of irregularities in the surface of recording material carried out by second calculation mea...
example 2
[0073]FIG. 8 is a sectional view showing configuration of an “image forming apparatus” according to a second example. The recording-material type determination apparatus used in this example is the same as the first example, and thus its description will be quoted.
[0074]In FIG. 8, reference numeral 101 denotes an image forming apparatus; 102 denotes a paper cassette; 103 denotes a paper feeding roller; 104 denotes a transferring-belt driving roller; 105 denotes a transferring belt; 106 to 109 denote yellow, magenta, cyan and black photosensitive drums; 110 to 113 denote transferring rollers; 114 to 117 denote yellow, magenta, cyan and black cartridges; 118 to 121 denote yellow, magenta, cyan and black optical units; and 122 denotes a fixing unit.
[0075]Using an electrophotographic process, the image forming apparatus according to this example transfers yellow, magenta, cyan and black images onto recording paper by superimposing them and thermally fixes the toner images by a fixing ro...
example 3
[0097]FIG. 10 is diagram showing composition of units controlled by a control CPU in an “image forming apparatus” according to a third example. The recording-material type determination apparatus used in this example is the same as the first example, and thus its description will be quoted.
[0098]InFIG. 10, reference numeral 24 denotes a digital signal processor. Reference numerals 11 to 22 denote the same components as those described in the second example, and thus description thereof will be omitted.
[0099]In this example, instead of the control CPU described in the second example, the digital signal processor (DSP) directly controls the image forming apparatus including motors as well as imaging information from the CMOS area sensor.
[0100]Recently, the performance of DSPs has been improved greatly. This has enabled real-time control including motor control as well as high-speed arithmetic processing of imaging information from CMOS area sensors, using a single DSP chip.
[0101]The i...
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