JPS5973751U - Image processing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

FIG. 1 is a side view showing the configuration of one type of copying machine implementing the present invention, FIG. 2 is a block diagram showing a partial schematic configuration of the electric circuit of the device shown in FIG. 1, and FIG. FIG. 2 is a block diagram showing a part of the . Figure 4a is a graph showing an example of the temperature change of the fixing roller as the power is turned on and off;
The figure is a graph showing an example of the relationship between the background potential of the photoreceptor drum and the pause time. FIG. 5 is a flowchart showing the general operation of the microcomputer CPU shown in FIG. FIG. 6 is a block diagram showing the electric circuit configuration of another embodiment of the present invention, and FIGS. 7a and 7b are flowcharts showing the general operation of the microprocessor MPU of FIG. 6. 1: Photosensitive drum, 2: Charger, 3: Contact glass, 4: Developing device, 5. 6: Recording paper cassette, 7
: Transfer charger, 8: Fixing roller (heat storage member), 9:
Developing bias electrode, 10: illumination light, 11: paper ejection tray,
50: Operation panel, 33: DC-DC converter, H
T: heater (electrical temperature converter), TH2, thermistor HCU, heater control circuit, NRAM: nonvolatile memory, OFT: power off period detection circuit, STT: copy suspension period detection circuit.

Claims (6)

[Scope of utility model registration request] (1) An image heating mechanism including a heat storage member; an electric temperature converter that heats the heat storage member to a temperature different from the ambient temperature or absorbs heat; and detects the temperature of the heat storage member when the power is turned on, and detects the temperature at this time. An image processing apparatus comprising: a control device that sets at least one image processing parameter such as a developing bias voltage and an exposure amount in accordance with the above. (2) The control device is equipped with a temperature control means for maintaining the heat storage member at a predetermined temperature, and sets image processing parameters in response to the difference between the temperature of the heat storage member detected when the power is turned on and the target temperature of the temperature control means. The scope of claim No. (
The image processing device described in section 1). (3) The image processing according to claim (2), wherein the control means sets the image processing parameters according to the temperature of the heat storage member detected when the power is turned on, the target temperature of the temperature control means, and the ambient temperature. Device. (4) The control means includes a nonvolatile memory, stores the temperature of the heat storage member immediately before the power is turned off in the nonvolatile memory, and uses the difference between the temperature of the heat storage member detected when the power is turned on and the temperature data in the nonvolatile memory. The image processing apparatus according to claim 1, wherein image processing parameters are set accordingly. (5) The image processing apparatus according to claim 4, wherein the control means sets the image processing parameters according to the temperature of the heat storage member detected when the power is turned on, the temperature data in the nonvolatile memory, and the ambient temperature. Processing equipment. (6) The above-mentioned utility model, in which the heat storage member is a fixing roller - Registered claims paragraphs (1), (2), and (3)
), (4), or (5).