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CN-119270604-B - Image forming apparatus, image forming method, and medium

CN119270604BCN 119270604 BCN119270604 BCN 119270604BCN-119270604-B

Abstract

The invention provides an image forming apparatus, an image forming method and a medium for solving the problem that the prior art fails to properly maintain the service life of a printer. The image forming apparatus includes a plurality of photosensitive bodies, a driving device for driving the plurality of photosensitive bodies to rotate, an exposing device for forming an electrostatic latent image by exposing at least one of the plurality of photosensitive bodies to an image, a plurality of developing devices for developing the plurality of latent images formed on the plurality of photosensitive bodies with toners of different colors so that the plurality of photosensitive bodies bear toner images, an intermediate transfer body in simultaneous contact with the plurality of image forming members for transferring the toner images, and a controller configured to determine a target photosensitive body that does not perform exposure according to an image forming job to be processed, the target photosensitive body being rotated at a second speed lower than a preset first speed by the driving device. The present invention can obtain the technical effect of preventing the life expectancy of the image forming device from being reduced.

Inventors

  • LIN YUQUAN

Assignees

  • 珠海奔图电子有限公司

Dates

Publication Date
20260512
Application Date
20241030

Claims (8)

  1. 1. An image forming apparatus, comprising: a plurality of photoreceptors; a driving device for driving the plurality of photosensitive bodies to rotate; An exposure device for forming an electrostatic latent image by image-exposing at least one of the plurality of photoconductors; a plurality of developing devices for performing development on the plurality of latent images formed on the plurality of photosensitive bodies by toners of different colors so that the plurality of photosensitive bodies bear toner images; an intermediate transfer member that is in contact with the plurality of photosensitive members at the same time and transfers the toner image; A controller configured to determine a target photoconductor not to perform exposure according to an image forming job to be processed, the target photoconductor being rotated at a second speed lower than a preset first speed by a driving device; The image forming apparatus further includes a high voltage control unit for generating a high voltage signal, the high voltage signal being simultaneously supplied to the plurality of photosensitive bodies; the controller is further configured to rotate the target photoconductor at a second speed lower than a preset first speed by the driving means when the high voltage signal is stabilized at an operating voltage, thereby determining a timing at which the target photoconductor starts to rotate to avoid the target photoconductor from rotating prematurely.
  2. 2. The image forming apparatus according to claim 1, wherein the controller is further configured to: when the image forming job is a black-and-white job, the target photoreceptors that are determined not to perform exposure are the C photoreceptor, the M photoreceptor, and the Y photoreceptor.
  3. 3. The image forming apparatus according to claim 1, further comprising: and a lifetime calculation unit configured to determine a lifetime expectation based on the rotational distances of the plurality of photoconductors.
  4. 4. The image forming apparatus according to claim 1, further comprising: a cleaning unit configured to perform cleaning after the image formation of the image forming job to be processed is completed; The controller is further configured to rotate the target photoconductor at a second speed lower than a preset first speed by the driving means when the cleaning is finished.
  5. 5. An image forming method, comprising: determining a target photoreceptor which does not perform exposure according to an image forming job to be processed; When the high voltage signal including the charging high voltage, the developing high voltage and the transfer high voltage is supplied to the image forming assembly, the target photoconductor is rotated at a second speed lower than the preset first speed, thereby determining a timing at which the target photoconductor starts to rotate to avoid the target photoconductor from rotating prematurely.
  6. 6. The method according to claim 5, wherein when the image forming job is a black-and-white job, the target photoreceptors for which exposure is not to be performed are determined to be C photoreceptors, M photoreceptors, and Y photoreceptors.
  7. 7. The method of claim 5, wherein rotating the target photoreceptor at a second speed that is lower than a preset first speed comprises: After the image formation of the image forming job to be processed is completed, cleaning is performed; when the cleaning is finished, the target photoconductor is rotated at a second speed lower than the preset first speed by a driving device.
  8. 8. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored program, wherein the program, when run, controls a device in which the computer readable storage medium is located to perform the method of any one of claims 5-7.

Description

Image forming apparatus, image forming method, and medium [ Field of technology ] The present invention relates to the field of imaging technologies, and in particular, to an image forming apparatus, an image forming method, and a medium. [ Background Art ] Color laser printers typically have multiple imaging assemblies, such as four color photosensitive drums, which may be C (Cyan ), M (Magenta), Y (Yellow), K (Black). In color image formation, a plurality of photoreceptors are sequentially subjected to processes such as charging, exposure, development, transfer, and the like. The charging process refers to uniformly distributing charges on the surface of a photoreceptor through a charging roller, exposing refers to exposing the surface of the photoreceptor by a laser beam emitted by an LSU (LASER SCANNING Unit), so as to form an electrostatic latent image, developing refers to attaching toner (such as charged toner) in a developing box to the position of the electrostatic latent image on the surface of the photoreceptor through electrostatic adsorption, so as to form a toner image, and transferring refers to transferring the toner image attached to the photoreceptor to an intermediate transfer body in a contact or non-contact mode, and then transferring the toner image to paper through the intermediate transfer body. In one existing transfer technique, the intermediate transfer body may be a belt-like structure (also referred to as a transfer belt), and the printer is a "tandem" color printer, i.e., a plurality of photosensitive bodies are simultaneously in contact with the transfer belt. Some tandem color printers are additionally provided with a separation mechanism that controls the contact or separation of each photoreceptor from the transfer belt, for example, when a print job requires only black to be imaged, the separation mechanism controls the contact of the K-color photoreceptor with the transfer belt and controls the separation of the C, M, Y-color photoreceptor from the transfer belt. However, such a separation mechanism requires additional costs and places higher demands on the control accuracy. Other tandem color printers are therefore not provided with a separation mechanism, where C, M, Y, K color-sensitive bodies are in constant contact with the transfer belt. In one existing high voltage control technique, a printer generates the high voltage required for the charging, developing, and transferring processes through a high voltage control circuit board. To avoid an increase in cost, a plurality of photosensitive body components may be connected in series, so that the high-voltage control circuit board needs to output only one signal to be supplied to all the photosensitive body components in one image forming step, without separate control for each photosensitive body component. However, when the above-described transfer technique without a separation mechanism and the high-pressure control technique in which a plurality of photoconductor assemblies are connected in series are used at the same time, there is a problem in that since the separation mechanism is not provided, C, M, Y, K photoconductor is always in contact with the transfer belt, and only K color is used when black-and-white printing is performed, how to control the motor of C, M, Y when black-and-white printing is performed is still further considered. If the motor C, M, Y is stopped, physical abrasion is generated between the photoreceptor stopped and the transfer belt which normally operates, and thus the actual service life of the photoreceptor assembly is reduced, and even if the motor is stopped, since a plurality of photoreceptor assemblies are connected in series, high voltage is supplied to the charging roller and the developing roller of C, M, Y color when supplied to the K photoreceptor assembly, resulting in electric loss caused by long-term inconsistency of the potential of the photoreceptor surface, while if the motor C, M, Y is normally rotated in the same manner as in color printing, the expected service life of the photoreceptor assembly is reduced because some printers calculate the expected service life of the photoreceptor according to the number of rotations of the photoreceptor, which means that even if the photoreceptor does not actually participate in the steps of exposure, development, etc., the actual rotation of the motor is considered to be reduced in the program calculation, and when the expected service life is exhausted, the printer gives prompt information to suggest that the user changes the imaging assembly to avoid the problem of potential image quality reduction, and in the case that the expected service life of the photoreceptor does not reach the actual service life, i.e., the user suffers loss. As can be seen, when black-and-white printing is performed, the life of the photoreceptor cannot be properly maintained regardless of whether the C, M, Y photoreceptor rotates normally or stops ro