Image formation control method, electronic equipment and storage medium

Abstract

The embodiment of the invention provides an image formation control method, electronic equipment and a storage medium. The method comprises the following steps: acquiring a potential value of the surface of an image carrier; when the potential value of the surface of the image carrier is greater than a preset potential threshold value, delaying an exposure time point of the image carrier; transfer control is performed on a recording medium of the image forming apparatus according to the delayed exposure time point of the image carrier. According to the embodiment of the invention, the image can be prevented from being dirty, and the image forming quality is ensured.

Description

Technical Field

[0001] The present application relates to the field of image forming technology, and in particular to an image forming control method, an electronic device and a storage medium. Background Art

[0002] At present, before the image forming device starts to expose, it first turns on the light to make the laser scanning unit (LSU) generate line synchronization. By detecting the line synchronization period, it is determined whether the line synchronization is stable, that is, whether the speed of the polygon mirror motor is stable. When the line synchronization is stable, the image forming operation is started. We refer to the imaging timing before the image forming operation is started as the pre-printing processing timing.

[0003] In the prior art, in order to prevent dirt from being generated on the image during the pre-printing processing sequence, after the light is turned on, the developer high voltage is adjusted to be consistent with the OPC (Organic Photoconductor) photosensitive drum high voltage, so that the pressure difference between the OPC and the developer roller is small, and the toner particles are not easily adsorbed on the OPC, so that no horizontal lines are generated during the line search synchronization process. However, the control method here is completely based on the calculation time after the light is turned on to obtain the relative control time. If the speed of the polygonal mirror motor is unstable, or the developer high voltage boost time is long, it will cause toner of different shades to adhere to the OPC, that is, it will cause the OPC to absorb powder, thereby contaminating the transfer belt.

[0004] At the same time, since the secondary transfer roller will open the positive pressure in advance during the paper feeding process, some dirt on the transfer belt that is closer to the image will be transferred to the secondary transfer roller along with the paper feeding voltage, causing the image to be dirty. Summary of the invention

[0005] In view of this, the present application provides an image formation control method, an electronic device and a storage medium to solve the problem of contamination on an image during the pre-printing processing sequence.

[0006] In a first aspect, an embodiment of the present application provides an image formation control method, which is applied to an image forming device, and the method includes:

[0007] acquiring a potential value of a surface of an image carrier;

[0008] When the potential value of the surface of the image carrier is greater than a preset potential threshold, delaying the exposure time point of the image carrier;

[0009] The recording medium of the image forming device is conveyed and controlled according to the delayed exposure timing of the image carrier.

[0010] In a possible implementation, obtaining the potential value of the surface of the image carrier includes:

[0011] Acquiring a potential detection signal of the surface of the image carrier within a first preset time period;

[0012] determining at least one signal value of the potential detection signal;

[0013] The potential value of the surface of the image carrier is determined based on the at least one signal value.

[0014] In a possible implementation manner, the starting time point of the first preset time period is the time point when the image forming device starts to perform line synchronization detection.

[0015] In a possible implementation, delaying the exposure time point of the image bearing body includes:

[0016] Determine a first time corresponding to a distance from an exposure position of the image carrier to a secondary transfer position, the secondary transfer position being a position where an image is transferred from a transfer belt to a recording medium, the image being an image generated at the exposure position of the image carrier when the image forming device starts to perform line synchronization detection;

[0017] The delay time is determined according to the first time, the first preset time period and the second preset time period, wherein, when the first time remains unchanged, the longer the first preset time period is, the shorter the delay time is, and the longer the second preset time period is, the longer the delay time is.

[0018] The exposure time point of the image bearing body is delayed according to the delay time.

[0019] In a possible implementation, the method further includes:

[0020] During the delay period, the transfer voltage of the secondary transfer roller is controlled to perform a cleaning operation on the transfer belt.

[0021] In a possible implementation, controlling the transfer voltage of the secondary transfer roller within the delay period to clean the transfer belt includes:

[0022] determining the number of cleaning operations that can be performed on the transfer belt within the delay period;

[0023] The transfer voltage of the secondary transfer roller is controlled according to the number of cleaning times.

[0024] In a possible implementation, determining the number of cleaning operations that can be performed on the transfer belt within the delay period includes:

[0025] The number of cleaning operations that can be performed on the transfer belt within the delay time period is determined based on the delay time, the cleaning preparation time of the secondary transfer roller before the secondary transfer, the time from the power-on start point of the secondary transfer roller to the movement of the image to the primary transfer position, and the time required for a cleaning operation. The primary transfer position is the position where the image is transferred from the image carrier to the transfer belt.

[0026] In a possible implementation manner, determining the first time corresponding to the distance from the exposure position to the secondary transfer position of the image carrier includes:

[0027] When the potential value of the surface of at least two of the image carriers is greater than a preset potential threshold, determining a first target image carrier among the at least two image carriers, the first target image carrier being the image carrier that first generates an exposure image at an exposure position among the at least two image carriers during the image forming process performed by the image forming device;

[0028] A first time corresponding to a distance from an exposure position of the first target image carrier to a secondary transfer position is determined.

[0029] In a possible implementation, the controlling the conveyance of the recording medium of the image forming device according to the delayed exposure time point of the image carrier includes:

[0030] When the image forming device performs color printing, determining a second target image bearing body, the second target image bearing body being an image bearing body that first generates an exposure image at an exposure position during the image forming process performed by the image forming device;

[0031] determining a first time corresponding to a distance from an exposure position to a secondary transfer position of the second target image carrier;

[0032] After the second target image carrier is exposed according to the delayed exposure time point of the image carrier, timing is started, and the timing time is equal to the difference between the first time and the first preset time period;

[0033] After the timing is over, the recording medium of the image forming device is conveyed under control.

[0034] In a possible implementation, delaying the exposure time point of the image bearing body includes:

[0035] When the image forming device performs black-and-white printing, the image carrier whose surface potential value is greater than a preset potential threshold is used as the image carrier to be confirmed, and the positional relationship between the image carrier to be confirmed and the black image carrier is confirmed;

[0036] If the image carrier to be confirmed generates an exposure image at an exposure position earlier than the black image carrier during the image forming process performed by the image forming device, obtaining a second time corresponding to the distance from the exposure position of the image carrier to be confirmed to the exposure position of the black image carrier;

[0037] The exposure time point of the black image carrier is delayed according to the second time.

[0038] In a possible implementation, the step of taking the image bearing body whose surface potential value is greater than a preset potential threshold as the image bearing body to be confirmed includes:

[0039] If there are at least two image carriers whose surface potential values ​​are greater than a preset potential threshold, the image carrier that first generates an exposure image at an exposure position among the at least two image carriers during image formation by the image forming device will be used as the image carrier to be confirmed.

[0040] In a possible implementation, delaying the exposure time point of the black image carrier according to the second time includes:

[0041] using the second time as a delay time;

[0042] The exposure time point of the image bearing body is delayed according to the delay time.

[0043] In a possible implementation, the controlling the conveyance of the recording medium of the image forming device according to the delayed exposure time point of the image carrier includes:

[0044] confirming a first time corresponding to a distance from an exposure position of the black image carrier to a secondary transfer position;

[0045] Starting timing after the black image carrier is exposed according to the delayed exposure time point of the image carrier, the timing time being equal to the difference between the first time and the first preset time period;

[0046] After the timing is over, the recording medium of the image forming device is conveyed under control.

[0047] In a second aspect, an embodiment of the present application provides an electronic device, including:

[0048] processor;

[0049] Memory;

[0050] A computer program is stored in the memory, and when the computer program is executed, the electronic device executes any one of the methods described in the first aspect.

[0051] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any method described in the first aspect.

[0052] The embodiment of the present application detects the potential value of the surface of the image carrier, and determines whether the image carrier absorbs powder according to whether the potential value of the surface of the image carrier is greater than a preset potential threshold value. When the image carrier absorbs powder, the exposure time point of the image carrier is delayed, and the recording medium of the image forming device is controlled to be transported according to the delayed exposure time point, thereby avoiding the contamination of the image and ensuring the quality of image formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0054] Figure 1 A schematic diagram of the structure of an image forming device provided in an embodiment of the present application;

[0055] Figure 2 A schematic diagram of a voltage control timing provided in an embodiment of the present application;

[0056] Figure 3 A schematic diagram of a flow chart of an image forming control method provided in an embodiment of the present application;

[0057] Figure 4 A schematic diagram of the installation position of a voltage sensor provided in an embodiment of the present application;

[0058] Figure 5 A schematic diagram of the structure of another image forming device provided in an embodiment of the present application;

[0059] Figure 6 A schematic diagram of another voltage control timing provided by an embodiment of the present application;

[0060] Figure 7 A schematic diagram of another voltage control timing provided by an embodiment of the present application;

[0061] Figure 8 A schematic diagram of the structure of an image forming device provided in an embodiment of the present application;

[0062] Fig. 9 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0063] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0064] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0065] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0066] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0067] To facilitate understanding, the specific structure and working principle of the image forming device are first exemplarily described below.

[0068] See also Figure 1 , is a schematic diagram of the structure of an image forming device provided in an embodiment of the present application. The image forming device 100 is used to perform image forming tasks, such as generating, printing, receiving and sending image data, and examples of the image forming device 100 include printers, scanners, copiers, fax machines, and multi-function peripherals (MFP) that perform the above functions in a single device.

[0069] As an example of an image forming apparatus 100, the image forming apparatus 100 includes an image carrier 101Y-K, a charging roller 102Y-K, a developing roller 103Y-K, a powder bin 104Y-K, a transfer belt 105, a secondary transfer roller 106, a paper supply box 107, a manual paper feed tray 108, a pickup roller 109, a conveying roller 110, a paper detection sensor 120, a laser scanning unit (LSU, Laser Scanning Unit) 111, a heat roller 112, a pressure roller 113, a discharge roller 114, and a discharge paper box 115. Generally speaking, the process box CM includes an image carrier 101Y-K, a charging roller 102Y-K, a developing roller 103Y-K, and a powder bin 104Y-K for containing toner.

[0070] LSU 111 is in the form of a single LSU, including four optical paths. Four charging rollers 102Y-K are used to charge the surfaces of four image carriers 101Y-K respectively, maintain the potential difference on the surfaces of the four image carriers 101Y-K, and the four optical paths of LSU 111 are used to emit laser beams to form electrostatic latent images on the surfaces of the image carriers 101Y-K, that is, to expose the surfaces of the image carriers 101Y-K to form exposure images. Four developing rollers 103Y-K are used to attach toner to the surfaces of the image carriers 101Y-K respectively, so as to convert the electrostatic latent images on the surfaces of the image carriers 101Y-K into colored toner images. The image forming device 100 adopts a secondary transfer method, that is, the four image carriers 101Y-K transfer the toner images to the transfer belt 105 in turn, and then the colored toner images formed on the transfer belt 105 are secondary transferred to the paper via the secondary transfer roller 106. The paper supply box 107 is used to store paper, and the pickup roller 109 is used to transport the stored paper to a transport path, that is, a paper path. The transport roller 110 is used to transport the paper to the secondary transfer roller 106 .

[0071] The secondary transfer roller 106 conveys the imaged paper to the clamping area of ​​the heat roller 112 and the pressure roller 113. The heat roller 112 and the pressure roller 113 are used to fix the toner image on the paper. The heat roller 112 can adopt a ceramic heating method. The heat roller 112 and the pressure roller 113 convey the fixed paper to the discharge roller 114. The discharge roller 114 discharges the paper to the discharge paper box 115 and stacks it.

[0072] The laser scanning unit 111 obtains the optical analog image signal of the original / source document by exposing the optical print head. The paper detection sensor 120 is used to detect whether there is paper in the paper path where it is located.

[0073] The paper supply box 107 is provided with a paper outlet, and the pickup roller 109 is specifically used to send the paper contained in the paper supply box 107 from the paper outlet to the paper path channel for transfer needs. The image forming device 100 also includes a driving mechanism (not shown) for driving the pickup roller 109 to work. The driving mechanism is a driving motor, which is used to drive the pickup roller 109 to move to achieve the paper pickup operation. The driving mechanism 181 is electrically connected to the controller of the image forming device (not shown) to realize the controller's control of the driving mechanism. The controller is electrically connected to the paper detection sensor 120, and the paper detection sensor sends the detection result information of whether there is paper on the paper path channel to the controller.

[0074] The image forming apparatus 100 further includes an operation panel (not shown), which includes an operation unit (not shown) including various keys and a touch panel type display unit (not shown).

[0075] It can be understood that the image forming device 100 listed above is only an example, and the component composition and component arrangement of the image forming device 100 can be adjusted according to actual conditions without affecting the improvement ideas of the embodiment of the present application.

[0076] It should be noted that, in some possible implementations, the image carrier is also called a photosensitive drum OPC (Organic Photoconductor).

[0077] At present, before the image forming device starts to expose, it first turns on the lamp to make the LSU generate line synchronization. By detecting the line synchronization period, it is determined whether the line synchronization is stable, that is, whether the speed of the polygon mirror motor is stable. When the line synchronization is stable, the image forming operation is started. We refer to the imaging timing before the image forming operation is started as the pre-printing processing timing.

[0078] In the prior art, in order to prevent the image from being stained during the pre-printing processing sequence, after the lamp is turned on, the developer high voltage is adjusted to be consistent with the OPC (Organic Photoconductor) photosensitive drum high voltage, such as Figure 2 As shown, the pressure difference between OPC and developing roller is small, and toner particles are not easily adsorbed to OPC, so that no horizontal lines will be generated during line synchronization. However, the control method here is to obtain the relative control time based on the calculation time after lighting. If the speed of the polygonal mirror motor is unstable, or the high voltage boost time of the developing roller is long, different shades of toner will be attached to OPC, which will cause OPC to absorb powder and contaminate the transfer belt.

[0079] At the same time, during the image forming operation, when the secondary transfer roller feeds the paper, the paper feed voltage will be turned on a certain amount in advance of the paper head, which will cause the dirt on the transfer belt that is closer to the image to be transferred to the secondary transfer roller along with the paper feed voltage, contaminating the secondary transfer roller and thus contaminating the image on the back. If it is in black and white printing mode, the color OPC absorbs powder, which will contaminate the front image.

[0080] In view of the above problems, the embodiments of the present application provide an image formation control method, an electronic device and a storage medium. The embodiments of the present application detect the potential value of the surface of the image carrier, and judge whether the image carrier absorbs powder according to whether the potential value of the surface of the image carrier is greater than a preset potential threshold. When the image carrier absorbs powder, the exposure time point of the image carrier is delayed, and the recording medium of the image forming device is conveyed and controlled according to the delayed exposure time point, so as to avoid the contamination of the image and ensure the quality of image formation.

[0081] A detailed description is given below with reference to the accompanying drawings.

[0082] See also Figure 3 , is a flow chart of an image formation control method provided in an embodiment of the present application. The method can be applied to Figure 1 In the image forming apparatus shown in FIG. Figure 3 As shown, the specific steps include the following steps.

[0083] S301: Acquire the potential value of the surface of the image carrier.

[0084] During the line synchronization detection process, the LSU will emit a light beam to form an electrostatic latent image on the surface of the image carrier. If there is a potential difference between the surface of the image carrier and the surface of the developing roller, the image carrier will absorb powder, that is, the developing roller will cause carbon powder to adhere to the surface of the image carrier, thereby converting the electrostatic latent image on the surface of the image carrier into a toner image. After the toner image is transferred to the transfer belt, it will be transferred to the paper due to the early positive pressure of the secondary transfer roller, resulting in a dirty image.

[0085] Therefore, in the embodiment of the present application, the potential value of the surface of the image carrier can be obtained, and whether there is a potential difference between the image carrier and the surface of the developing roller can be confirmed based on the potential value of the surface of the image carrier, so that it can be determined whether the image carrier has generated powder suction action during the line synchronization detection process.

[0086] In a specific implementation, the potential value of the surface of the image carrier can be detected by a voltage sensor, such as Figure 4As shown, the voltage sensor is arranged between the contact point d4 and the contact point d3, the contact point d4 is the contact point between the developing roller and the image carrier, and the contact point d3 is the contact point between the transfer belt and the image carrier, also known as the primary transfer point or the primary transfer position. The distance between the voltage sensor at the end detection position d2 of the image carrier and the exposure position d1 of the image carrier is a millimeter, and the distance between the exposure position d1 of the image carrier and the primary transfer position d3 is specifically b millimeters.

[0087] In a specific implementation, the specific circuit structure and operating principle of the voltage sensor can be referred to the content description in the relevant technology. For the sake of brevity, the embodiments of the present application will not be repeated here.

[0088] In a possible implementation, obtaining the potential value of the surface of the image carrier specifically includes: obtaining a potential detection signal of the surface of the image carrier within a first preset time period, determining at least one signal value in the potential detection signal, and determining the potential value of the surface of the image carrier according to the at least one signal value, wherein the starting time point of the first preset time period is the time point when the image forming device starts to perform line synchronization detection. In the embodiment of the present application, the at least one signal value may be a signal peak value, or an average value of multiple potential detection signal values, or a more accurate potential detection value obtained after processing by other algorithms.

[0089] In a specific implementation, after the light is turned on, that is, after the line synchronization detection begins, the image forming device begins to obtain the potential detection signal of the surface of the image carrier through the voltage sensor, and after the image carrier rotates through the first preset time period, the obtained potential detection signal is processed, wherein the first preset time period is the time period required for the image carrier to rotate through a distance of (a+(ba) / 2) mm. Specifically, since the obtained potential detection signal is a continuous electrical signal and includes multiple signal peaks, and the potential difference between the image carrier and the surface of the developing roller is the largest at the signal peak, and in order to avoid the influence of the background noise, it is necessary to obtain the potential value of the surface of the image carrier based on the signal peak. Specifically, the first n signal peaks in the obtained potential detection signal are determined, and the average value of the first n signal peaks is calculated, and the average value of the first n signal peaks is the potential value of the surface of the image carrier. Among them, selecting n signal peaks for average value calculation can ensure that the potential value of the surface of the image carrier is accurately calculated, and n can be set according to the actual situation of the voltage sensor and user needs, n=1,2,3..., and the embodiment of the present application does not make specific requirements for this.

[0090] S302: When the potential value of the surface of the image carrier is greater than a preset potential threshold, delaying the exposure time point of the image carrier.

[0091] In the embodiment of the present application, a preset potential threshold Vq is stored in the image forming device in advance. The preset potential threshold Vq can be determined according to the potential detection signal detected by the voltage sensor when there is no obvious bottom ash on the image carrier, that is, no obvious carbon powder particles on the surface of the image carrier. When the potential value of the surface of the image carrier is obtained, the potential value of the surface of the image carrier is compared with the preset potential threshold Vq; if the potential value of the surface of the image carrier is greater than the preset potential threshold Vq, it is considered that the image carrier has a powder absorption action in the line synchronization detection stage (pre-printing processing stage), that is, carbon powder is attached to the image carrier through the developing roller, which means that there will be a carbon powder image transferred to the transfer belt, so it is necessary to delay the exposure time point of the image carrier at this time to avoid the image formed in the line synchronization detection stage from being transferred to the paper, resulting in a dirty image; and if the potential value of the surface of the image carrier is less than or equal to the preset potential threshold Vq, it is considered that the image carrier has no powder absorption action in the line synchronization detection stage, the image is clean, and the image forming device can prepare for the image forming operation, that is, it can start to expose and image on the image carrier.

[0092] In one possible implementation, delaying the exposure time point of the image carrier specifically includes: determining a first time corresponding to a distance from an exposure position of the image carrier to a secondary transfer position, wherein the secondary transfer position is a position where an image is transferred from a transfer belt to a recording medium, and the image is an image generated at the exposure position of the image carrier when an image forming device starts line synchronization detection; determining a delay time according to the first time, a first preset time period, and a second preset time period, wherein, when the first time remains unchanged, the longer the first preset time period is, the shorter the delay time is, and the longer the second preset time period is, the longer the delay time is; and delaying the exposure time point of the image carrier according to the delay time.

[0093] In specific implementation, Figure 5 As shown, the secondary transfer position is point E on the figure. When the potential value of the surface of the image carrier, such as the image carrier 101Y, is greater than the preset potential threshold, the first time corresponding to the distance from the exposure position Y of the image carrier 101Y to the secondary transfer position E is determined. After the first time is obtained, the delay time can be determined according to formula (1), where formula (1) is:

[0094] X=T1-S1+S2 (1)

[0095] Wherein, T1 is the first time, S1 is the first preset time period, S2 is the second preset time period, and X is the delay time.

[0096] In a specific implementation, the first time corresponding to the distance from point Y to point E can be obtained according to the time required for the image generated during the line synchronization detection process to move from the exposure position Y of the image carrier 101Y to the secondary transfer position E (the movement direction is Y→Y1→M1→C1→K1→E). Similarly, in the following text, the time corresponding to each distance can be obtained according to the time required for the image generated during the line synchronization detection process to move the corresponding distance. For the sake of simplicity, it will not be repeated in the following text.

[0097] In another possible implementation, when the potential value of the surface of the image carrier is greater than the preset potential threshold, the delay time can be determined according to the formula X=t+t2+S2, where t is the time corresponding to the distance of (ba) / 2 mm, and T2 is the time corresponding to the distance from the primary transfer position to the secondary transfer position of the image carrier. For example, Figure 5 As shown, if the potential value of the surface of the image carrier 101Y is greater than the preset potential threshold, T2 is the time corresponding to the distance from the primary transfer position Y1 to the secondary transfer position E of the image carrier 101Y (the moving direction is Y1→M1→C1→K1→E).

[0098] In a possible implementation, the second preset time period can be determined based on the time corresponding to the distance from point E to point A of the image forming device, and its purpose is to allow the toner image generated on the image carrier during the line synchronization detection process to be scraped into the waste toner bin by the cleaning scraper 116 after passing the secondary transfer position, so that when the subsequent image forming device performs the image forming operation, the transfer belt is in a clean state and no dirt is generated on the image. Specifically, the second preset time period can be set to be greater than or equal to the time corresponding to the distance from point E to point A. Preferably, in order to reduce the time of delaying the image forming operation, the second preset time period can be set to be equal to the time corresponding to the distance from point E to point A.

[0099] In a possible implementation, after the delay time is determined, the image forming device counts according to the delay time, and after the timing ends, notifies the LSU to start exposure and perform a formal printing operation. Even if an electrostatic light image is formed on the OPC during the line synchronization detection stage, and the polygonal mirror motor speed is unstable, or the high-voltage boost time of the developer is long, the toner in the developer box has been adsorbed to the OPC surface and transferred to the transfer belt, but after the delayed LSU exposure time of the present application, the dirty image of the transfer belt that is accidentally adsorbed can be scraped into the waste toner bin by the cleaning scraper 116, so the present application can avoid the dirty image from being transferred to the paper.

[0100] It should be noted that, in the embodiment of the present application, delaying the exposure time point of the image carrier refers to delaying the exposure time point of the image carrier during the image forming operation performed by the image forming device.

[0101] It should be noted that the recording medium involved in the embodiment of the present application refers to a carrier for carrying image forming content, for example, the recording medium can be paper. Of course, in addition to paper, the recording medium can also be a carrier of other materials, and the embodiment of the present application does not specifically limit this.

[0102] In one possible implementation, when the acquired potential values ​​of the surfaces of the image carriers include the potential values ​​of the surfaces of at least two image carriers that are greater than a preset potential threshold value Vq, it is necessary to determine a first target image carrier among the at least two image carriers, wherein the first target image carrier is the image carrier that first generates an exposure image at an exposure position among the at least two image carriers during image formation by the image forming device, and the time corresponding to the distance from the exposure position of the first target image carrier to the secondary transfer position is determined as the first time.

[0103] For example, Figure 5 As shown, in the process of image formation performed by the image forming device, the exposure time point of the image carrier 102Y is earlier than the exposure time point of the image carrier 102M, the exposure time point of the image carrier 102M is earlier than the exposure time point of the image carrier 102C, and the exposure time point of the image carrier 102C is earlier than the exposure time point of the image carrier 102K. Therefore, if it is found in the potential value detection process that the potential values ​​of the surfaces of the image carriers 102C and 102M are both greater than the preset potential threshold value Vq, the image carrier 102M is confirmed as the first target image carrier, and the time corresponding to the distance from the exposure position M to the secondary transfer position E of the image carrier 102M is obtained, and the time is confirmed as the first time for subsequent delay time calculation.

[0104] In the implementation of the present application, when the potential values ​​of the surfaces of at least two image carriers are higher than a preset potential threshold, the image carrier that first generates an exposure image at the exposure position is used as the first target image carrier, and a delay time calculation is performed. This can ensure that the toner images generated on the image carrier during the line synchronization detection process are all scraped into the waste toner bin by the cleaning scraper before the image forming operation is performed, thereby ensuring the quality of the output image.

[0105] In specific implementation, since the secondary transfer roller will open positive pressure in advance during the image forming operation, the toner image on the image carrier may be adsorbed by the secondary transfer roller after being transferred to the transfer belt, causing the secondary transfer roller to be contaminated, and then contaminating the image during the image forming process. Therefore, in the embodiment of the present application, the transfer voltage of the secondary transfer roller is also controlled during the delay period to clean the transfer belt and prevent the secondary transfer roller from being contaminated.

[0106] In a possible implementation, the transfer voltage of the secondary transfer roller is controlled to clean the transfer belt, specifically including: determining the number of cleaning operations that can be performed on the transfer belt within the delay period, and controlling the transfer voltage of the secondary transfer roller according to the number of cleaning operations.

[0107] In one possible implementation, the number of cleaning operations that can be performed on the transfer belt within the delay time period can be determined based on the delay time, the cleaning preparation time of the secondary transfer roller before the secondary transfer, the time from the power-on start point of the secondary transfer roller to the time when the image moves to the primary transfer position, and the time required for one cleaning operation, wherein the delay time, the time from the power-on start point of the secondary transfer roller to the time when the image moves to the primary transfer position, and the number of cleaning operations that can be performed on the transfer belt within the delay time period are directly proportional, and the cleaning preparation time of the secondary transfer roller before the secondary transfer and the time required for one cleaning operation are inversely proportional to the number of cleaning operations that can be performed on the transfer belt within the delay time period.

[0108] See also Figure 6 , is a schematic diagram of a voltage control timing provided in an embodiment of the present application, wherein g is the time from the power-on start point of the secondary transfer roller to the image moving to the primary transfer position, f is the cleaning preparation time of the secondary transfer roller before the secondary transfer, and c is the time required for a cleaning operation. In the embodiment of the present application, Figure 6 As shown, the time for cleaning the transfer belt needs to be selected after the cleaning preparation time f. Therefore, the intersection of the delay time X and the cleaning preparation time f needs to be deleted, and then the number of cleaning operations that can be performed on the transfer belt is calculated in the remaining delay time. Specifically, the number of cleaning operations N that can be performed on the transfer belt in the delay time period can be determined according to formula (2), where formula (2) is:

[0109] N=[(X-(fg)) / c] (2)

[0110] In a specific implementation, the difference between f and g is actually greater than the intersection of X and f. However, in order to ensure that the subsequent calculation results have a certain margin, the difference between f and g is taken as the intersection value of X and f.

[0111] It should be noted that in formula (2), [] means rounding down, that is, N only takes the integer part of the calculated result, and the decimal part is discarded.

[0112] In one possible implementation, Figure 6As shown, the time c required for one cleaning operation includes the duration c1 of the transfer voltage of the secondary transfer roller at the first voltage, and the duration c2 of the transfer voltage of the secondary transfer roller at the second voltage, wherein the first voltage may be a high voltage (positive voltage), the second voltage may be a low voltage (negative voltage), or the first voltage is a low voltage (negative voltage), and the second voltage is a high voltage (positive voltage). Therefore, the transfer voltage of the secondary transfer roller is controlled according to the number of cleaning times, that is, the transfer voltage of the secondary transfer roller is controlled to jump between the first voltage and the second voltage according to the number of cleaning times.

[0113] In the embodiment of the present application, the transfer voltage of the secondary transfer roller continuously switches between high voltage and low voltage during the cleaning operation, so that the secondary transfer roller will not be contaminated by the powder on the transfer belt, thereby ensuring the quality of the output image.

[0114] In one possible implementation, if the potential value of the surface of the image carrier is less than or equal to the preset potential threshold Vq, that is, the image carrier does not absorb powder, the LSU can be notified to perform the exposure operation after the exposure point of the image carrier passes the transfer point once, thereby reducing the output time of the home page image.

[0115] In practical applications, a color image forming device with multiple toner bins of different colors can perform color image printing and black and white image printing. When printing a color image, multiple toner bins of different colors are required, such as Figure 1 Among the black powder bin 104K, cyan powder bin 104C, magenta powder bin 104M and yellow powder bin 104Y, only the black powder bin 104K is needed for black and white portrait printing. Therefore, for different portrait printing tasks, the delay time can be calculated in another different way.

[0116] In a possible implementation, when a low-cost color image forming device performs color printing, in order to save costs, the black powder bin and other color powder bins share a control port. If other color image carriers absorb powder, the delay time can be determined according to the third preset time period. The third preset time period is a time period set by the user according to the needs. When setting, it is only necessary to ensure that the exposure time point when performing color printing and the exposure time point in the line synchronization detection process have a certain time interval. Image contamination can be avoided later by controlling the transmission operation of the recording medium (detailed description below).

[0117] In one possible implementation, when the image forming device performs black-and-white printing, if an image carrier has undergone a powder absorption operation, the image carrier whose surface potential value is greater than a preset potential threshold (the image carrier that has undergone a powder absorption operation) is used as the image carrier to be confirmed, and the positional relationship between the image carrier to be confirmed and the black image carrier is confirmed. If the image carrier to be confirmed generates an exposure image at the exposure position earlier than the black image carrier during the image formation process performed by the image forming device, the second time corresponding to the distance from the exposure position of the image carrier to be confirmed to the exposure position of the black image carrier is obtained, and the exposure time point of the black image carrier is delayed according to the second time. The exposure time point of the black image carrier is delayed according to the second time to ensure that the toner image on the image carrier to be confirmed passes the primary transfer point of the black image carrier, thereby not affecting the toner image generated by the black image carrier when performing black-and-white printing, so that image contamination can be avoided later by controlling the conveying operation of the recording medium (described in detail below).

[0118] In a specific implementation, delaying the exposure time point of the black image carrier according to the second time includes: using the second time as the delay time, and delaying the exposure time point of the black image carrier according to the delay time.

[0119] If the image carrier to be confirmed produces an exposure image at the exposure position later than the black image carrier during the image formation process performed by the image forming device, black and white printing can be performed according to the normal setting time; if the image carrier to be confirmed is the black image carrier, the delay time is set according to the above-mentioned color printing method.

[0120] In one possible implementation, if at least two image carriers absorb powder when the image forming device performs black and white printing, the image carrier that first generates an exposure image at the exposure position among the at least two image carriers during the image formation process of the image forming device will be used as the image to be confirmed.

[0121] For example, Figure 5As shown, the black image carrier 101K is arranged at the position closest to the secondary transfer position E. When an image carrier with powder absorption action is detected, such as image carrier 101M and image carrier 101C are detected to have powder absorption action, image carrier 101M is confirmed as the image to be confirmed according to the order in which the image carriers generate exposure images in the image forming operation. Since image carrier 101M generates an exposure image at the exposure position earlier than the black image carrier 101K in the process of image formation performed by the image forming device, the second time corresponding to the distance from exposure position M of image carrier 101M to exposure position K of black image carrier 101K is obtained, and the difference between the second time and the first preset time period is confirmed as the delay time, and the exposure time point of the black image carrier 101K is delayed according to the delay time.

[0122] The embodiments of the present application can calculate the delay time in different ways according to the printing scenarios, and while ensuring the portrait printing quality in different printing scenarios, reduce the output time of the portrait home page as much as possible, thereby shortening the overall printing time.

[0123] S303: Controlling the conveyance of the recording medium of the image forming apparatus according to the delayed exposure time point of the image carrier.

[0124] In the embodiment of the present application, if the image forming device calculates the delay time according to the printing scenario, it is necessary to control the conveyance of the recording medium of the image forming device according to the delayed exposure time point of the image carrier.

[0125] Specifically, when the image forming device performs color printing, a second target image carrier is determined, and the second target image carrier is the image carrier that first generates an exposure image at an exposure position during the image forming process performed by the image forming device; a first time corresponding to the distance from the exposure position of the second target image carrier to the secondary transfer position is determined; timing is started after the second target image carrier is exposed according to the exposure time point of the delayed image carrier, and the timing time is equal to the difference between the first time and the first preset time period; after the timing ends, the recording medium of the image forming device is controlled to be transported.

[0126] In the embodiment of the present application, the first preset time period is subtracted from the first time because the detection of the powder absorption action of the image carrier is after the first preset time period. Subtracting the first preset time period can reduce the output time of the first page image during color printing.

[0127] In an embodiment of the present application, controlling the transport of the recording medium of the image forming device refers to controlling the transport roller to transport the recording medium to the secondary transfer roller, and controlling the paper feed voltage of the secondary transfer roller so that the image on the secondary transfer roller is aligned with the recording medium, thereby accurately printing the image on the recording medium.

[0128] In a possible implementation, before controlling the transport of the recording medium of the image forming device, it is necessary to first determine whether there is a recording medium in the paper path. If there is a recording medium, the transport of the recording medium is controlled; if there is no recording medium, a recording medium upward movement failure is reported.

[0129] For example, Figure 5 As shown, when the image forming device performs color printing, since the image carrier 101Y is the image carrier that first generates an exposure image at the exposure position during the image forming process performed by the image forming device, the image carrier 101Y is determined as the second target image carrier, and the first time corresponding to the distance from the exposure position Y of the image carrier 101Y to the secondary transfer position E is obtained. The timing time is obtained according to the difference between the first time and the first preset time period. The timing starts after the image carrier 101Y is exposed according to the delayed exposure time point. After the timing ends, it is determined whether there is a recording medium in the paper path, that is, whether there is paper at point H. If there is paper, it means that the image forming device has started to rub the paper upward, and the conveying roller 110 is controlled to convey the paper to the secondary transfer roller 106, even if the front end of the paper reaches point E, and the paper feeding voltage of the secondary transfer roller 106 is controlled to start the image printing. Through the above process, the embodiment of the present application can accurately control the paper feeding voltage to be synchronized with the image head.

[0130] In the embodiment of the present application, the voltage control timing of the secondary transfer roller is specifically as follows: Figure 7 As shown. After the timing is over, the paper feed voltage of the secondary transfer roller is turned on to control the paper feed, and after the voltage sensor is reset, the paper feed voltage is turned off after a period of time corresponding to the distance. The extended distance is the distance between the voltage sensor and the transfer roller plus a margin, which is used to ensure that the paper feed voltage is turned off after the tail of the paper completely leaves the secondary transfer roller.

[0131] Specifically, when the image forming device performs black and white printing, the first time corresponding to the distance from the exposure position of the black image carrier to the secondary transfer position is confirmed; the timing starts after the black image carrier is exposed according to the delayed exposure time point of the image carrier, and the timing time is equal to the difference between the first time and the first preset time period; after the timing ends, the recording medium of the image forming device is controlled to be transported.

[0132] In the embodiment of the present application, subtracting the first preset time period from the first time can reduce the output time of the first page portrait when printing in black and white.

[0133] For example, Figure 5 As shown, when the image forming device performs black and white printing, the first time corresponding to the distance E from the exposure position K of the black image carrier 101K to the secondary transfer position is confirmed, and the timing time is obtained according to the difference between the first time and the first preset time period. The timing starts after the black image carrier 101K is exposed according to the delayed exposure time point. After the timing ends, it is determined whether there is a recording medium in the paper path, that is, whether there is paper at point H. If there is paper, it means that the image forming device has started to rub the paper upwards, and controls the conveying roller 110 to convey the paper to the secondary transfer roller 106, even if the front end of the paper reaches point E, and then controls the paper feeding voltage of the secondary transfer roller 106 to start portrait printing.

[0134] In the embodiment of the present application, timing starts after the image carrier is exposed according to the delayed exposure point. During the timing, the transfer belt transports the toner image generated during the line synchronization detection process to the secondary transfer roller, and when the timing ends, the toner image reaches the secondary transfer roller. At the same time, when the timing ends, the recording medium of the image forming device is transported and controlled so that when the recording medium reaches the secondary transfer roller, the toner image has left the secondary transfer roller, so that the toner image generated during the line synchronization detection process will not contaminate the image, thereby ensuring the output quality of the image.

[0135] The embodiment of the present application can reduce the delayed printing time as much as possible while ensuring the image quality by accurately calculating the exposure time point of the image carrier and the transmission timing of the recording medium.

[0136] In actual applications, after a printer using two-component toner is turned on, the toner is pre-stirred to make the toner and the carrier rub to charge the toner. Generally, the pre-stirring time is about 30 seconds, during which the toner charge slowly increases. The existing technology has a fixed pre-stirring time, which may result in insufficient or excessive toner charge.

[0137] During pre-stirring, the magnetic roller and the image carrier will also rotate and apply high developing voltage and high charging voltage to inhibit the toner from adhering to the surface of the image carrier to produce bottom ash. However, since the toner charge is too low in the early stage of pre-stirring, there is more bottom ash in the early stage, and then the bottom ash gradually decreases as the toner charge increases.

[0138] The CTD Sensor is a sensor used to detect the amount of toner during color calibration. The ADC (Analysis-to-Digital Converter) value collected by its diffuse reflection channel is related to the toner density on the I TB. When there is no toner, the ADC value is close to 0. The higher the toner density, the higher the ADC value of the diffuse reflection channel.

[0139] Therefore, the embodiment of the present application can use a CTD Sensor to detect the amount of carbon powder charged during the pre-mixing process, and the scheme is as follows:

[0140] 3 seconds after the pre-stirring is started, the ADC values ​​of the diffuse reflection channels of the CTD Sensors on both sides are collected. 50 values ​​are collected every 50ms, and the maximum and minimum 10 values ​​are removed. The remaining 30 values ​​are averaged until the collected ADC value drops below 50. Pre-stirring is stopped when the collected ADC value drops below 50. If the collected ADC value is below 50, it means that the bottom ash is in good condition and printing is resumed. If it is above 50, stirring is continued for 10 seconds.

[0141] The maximum pre-stirring time is set to 40s. If the ADC value has not dropped below 50 after 40s of pre-stirring, pre-stirring is stopped.

[0142] The embodiment of the present application can accurately control the pre-mixing time and end the pre-mixing after the toner charge reaches the target value, thereby reducing the user's waiting time and preventing the toner charge from being too high or too low.

[0143] Corresponding to the above-mentioned embodiment, the embodiment of the present application further provides a structural schematic diagram of an image forming device.

[0144] See also Figure 8 , is a schematic diagram of the structure of an image forming device provided in an embodiment of the present application. Figure 8 As shown, the image forming device 800 includes: an acquisition unit 801, used to acquire the potential value of the surface of the image carrier; a delay unit 802, used to delay the exposure time point of the image carrier when the potential value of the surface of the image carrier is greater than a preset potential threshold; a transmission control unit 803, used to control the transmission of the recording medium of the image forming device according to the delayed exposure time point of the image carrier.

[0145] The specific contents of the embodiments of the present application can be found in the description of the above method embodiments, and will not be repeated here for the sake of brevity.

[0146] Corresponding to the above embodiments, the present application also provides a mobile electronic device.

[0147] See also Fig. 9 , is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application, and the electronic device 900 may include: a processor 910, a memory 920, and a communication unit 930. These components communicate through one or more buses. Those skilled in the art can understand that the structure of the electronic device shown in the figure does not constitute a limitation on the embodiment of the present application. It can be a bus structure or a star structure, and can also include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0148] The communication unit 930 is used to establish a communication channel so that the electronic device can communicate with other devices, receive user data sent by other devices or send user data to other devices.

[0149] The processor 910 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. It runs or executes software programs, instructions, and / or modules stored in the memory 920, and calls data stored in the memory to perform various functions of the electronic device and / or process data. The processor can be composed of an integrated circuit (IC), for example, it can be composed of a single packaged IC, or it can be composed of a plurality of packaged ICs with the same or different functions. For example, the processor 910 can include only a central processing unit (CPU). In the embodiment of the present application, the CPU can be a single computing core or multiple computing cores.

[0150] The memory 920 is used to store the execution instructions of the processor 910. The memory 920 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0151] When the execution instructions in the memory 920 are executed by the processor 910, the electronic device 900 can execute Figure 3 Some or all of the steps in the illustrated embodiments.

[0152] In a specific implementation, the present application further provides a computer storage medium, wherein the computer storage medium may store a program, and when the program is executed, the program may include some or all of the steps in each embodiment of the image formation control method provided in the embodiment of the present application. The storage medium may be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0153] In a specific implementation, the present application also provides a computer program product, wherein the computer program product includes executable instructions, and when the executable instructions are executed on a computer, the computer executes part or all of the steps in each embodiment of the image formation control method provided in the present application.

[0154] Those skilled in the art can clearly understand that the technology in the embodiments of the present application can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the technical solution in the embodiments of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application or some parts of the embodiments.

[0155] In this specification, the same or similar parts between the various embodiments can be referred to each other. In particular, for the device embodiment and the electronic device embodiment, since they are basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiment.

Claims

1. An image formation control method, characterized in that: Applied to an image forming device, the method comprises: acquiring a potential value of a surface of an image carrier; When the potential value of the surface of the image carrier is greater than a preset potential threshold, delaying the exposure time point of the image carrier; The recording medium of the image forming device is conveyed and controlled according to the delayed exposure timing of the image carrier.

2. The method according to claim 1, characterized in that The step of obtaining the potential value of the surface of the image carrier comprises: Acquiring a potential detection signal of the surface of the image carrier within a first preset time period; determining at least one signal value of the potential detection signal; The potential value of the surface of the image carrier is determined based on the at least one signal value.

3. The method according to claim 2, characterized in that The starting time point of the first preset time period is the time point when the image forming device starts to perform line synchronization detection.

4. The method according to claim 2, characterized in that: The delaying the exposure time point of the image bearing body comprises: Determine a first time corresponding to a distance from an exposure position of the image carrier to a secondary transfer position, the secondary transfer position being a position where an image is transferred from a transfer belt to a recording medium, the image being an image generated at the exposure position of the image carrier when the image forming device starts to perform line synchronization detection; Determine the delay time according to the first time, the first preset time period and the second preset time period, wherein, when the first time remains unchanged, the longer the first preset time period is, the shorter the delay time is, and the longer the second preset time period is, the longer the delay time is; The exposure time point of the image bearing body is delayed according to the delay time.

5. The method according to claim 4, characterized in that The method further comprises: During the delay period, the transfer voltage of the secondary transfer roller is controlled to perform a cleaning operation on the transfer belt.

6. The method according to claim 5, characterized in that The method of controlling the transfer voltage of the secondary transfer roller during the delay period to clean the transfer belt comprises: determining the number of cleaning operations that can be performed on the transfer belt within the delay period; The transfer voltage of the secondary transfer roller is controlled according to the number of cleaning times.

7. The method according to claim 6, characterized in that The determining the number of cleaning operations that can be performed on the transfer belt within the delay period includes: The number of cleaning operations that can be performed on the transfer belt within the delay time period is determined based on the delay time, the cleaning preparation time of the secondary transfer roller before the secondary transfer, the time from the power-on start point of the secondary transfer roller to the movement of the image to the primary transfer position, and the time required for a cleaning operation. The primary transfer position is the position where the image is transferred from the image carrier to the transfer belt.

8. The method according to claim 4, characterized in that Determining a first time corresponding to a distance from an exposure position of the image carrier to a secondary transfer position includes: When the potential value of the surface of at least two of the image carriers is greater than a preset potential threshold, determining a first target image carrier among the at least two image carriers, the first target image carrier being the image carrier that first generates an exposure image at an exposure position among the at least two image carriers during the image forming process performed by the image forming device; A first time corresponding to a distance from an exposure position of the first target image carrier to a secondary transfer position is determined.

9. The method according to claim 2, characterized in that: The method of controlling the recording medium of the image forming device to be transported according to the delayed exposure time point of the image carrier comprises: When the image forming device performs color printing, determining a second target image bearing body, the second target image bearing body being an image bearing body that first generates an exposure image at an exposure position during the image forming process performed by the image forming device; determining a first time corresponding to a distance from an exposure position to a secondary transfer position of the second target image carrier; After the second target image carrier is exposed according to the delayed exposure time point of the image carrier, timing is started, and the timing time is equal to the difference between the first time and the first preset time period; After the timing is over, the recording medium of the image forming device is transported and controlled.

10. The method according to claim 2, characterized in that The delaying of the exposure time point of the image bearing body comprises: When the image forming device performs black-and-white printing, the image carrier whose surface potential value is greater than a preset potential threshold is used as the image carrier to be confirmed, and the positional relationship between the image carrier to be confirmed and the black image carrier is confirmed; If the image carrier to be confirmed generates an exposure image at an exposure position earlier than the black image carrier during the image forming process performed by the image forming device, obtaining a second time corresponding to the distance from the exposure position of the image carrier to be confirmed to the exposure position of the black image carrier; The exposure time point of the black image carrier is delayed according to the second time.

11. The method according to claim 10, characterized in that The method of taking the image bearing body whose surface potential value is greater than a preset potential threshold as the image bearing body to be confirmed comprises: If there are at least two image carriers whose surface potential values ​​are greater than a preset potential threshold, the image carrier that first generates an exposure image at an exposure position among the at least two image carriers during image formation by the image forming device will be used as the image carrier to be confirmed.

12. The method according to claim 10, characterized in that The step of delaying the exposure time point of the black image carrier according to the second time includes: using the second time as a delay time; The exposure time point of the black image bearing body is delayed according to the delay time.

13. The method according to claim 10, characterized in that The method of controlling the recording medium of the image forming device to be transported according to the delayed exposure time point of the image carrier comprises: confirming a first time corresponding to a distance from an exposure position of the black image carrier to a secondary transfer position; Starting timing after the black image carrier is exposed according to the delayed exposure time point of the image carrier, the timing time being equal to the difference between the first time and the first preset time period; After the timing is over, the recording medium of the image forming device is conveyed under control.

14. An electronic device, characterized in that: include: processor; Memory; A computer program is stored in the memory, and when the computer program is executed, the electronic device executes the method according to any one of claims 1 to 13.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method according to any one of claims 1 to 13.

Images