A control method and apparatus of an image forming apparatus

Abstract

The application provides a control method and device of an image forming equipment and the image forming equipment. The control method of the image forming equipment comprises: obtaining a first voltage value and a state flag bit; judging whether a current voltage state is normal according to the first voltage value and the state flag bit, obtaining a first judgment result, and executing a voltage reduction process when the first judgment result indicates that the current voltage state is abnormal. Through the control method of the application, the abnormality of the current voltage state is determined through the indication of the state flag bit, and the voltage reduction process is executed, so that the problem that the resistance value of a transfer roller changes due to the environment and the use state, the voltage is affected, and the image quality is affected can be solved.

Description

Technical Field

[0001] This application relates to a control method for an image forming apparatus and an image forming apparatus, and more particularly to a method and apparatus for controlling the voltage of an image forming apparatus before or during image forming. Background Technology

[0002] In image forming equipment employing electrophotographic or electrostatic recording methods, a toner image formed on the surface of a photosensitive drum is transferred onto a sheet serving as a recording medium, thus recording the image on the sheet. Typically, regarding the transfer of the toner image, in one case, the toner on the surface of the photosensitive drum is electrostatically transferred to the sheet by applying a bias to the transfer roller while the sheet is being conveyed by pressing it between the photosensitive drum and the transfer roller. In another case, the toner image formed on the surface of the photosensitive drum is transferred to a transfer belt, and the toner image on the transfer belt is further transferred to the sheet. While the sheet is being conveyed by pressing it between the transfer belt and the transfer roller, the toner on the surface of the transfer belt is electrostatically transferred to the sheet by applying a bias to the transfer roller.

[0003] However, during the process of transferring the toner image onto the sheet, due to the physical characteristics of the transfer roller itself, the resistance of the transfer roller varies depending on the environment (temperature and humidity) of the image forming equipment and its usage, thus affecting the actual bias applied to the transfer roller and consequently affecting the image quality. Summary of the Invention

[0004] This application provides a control method for an image forming apparatus and an image forming apparatus, which can solve the problem that the resistance of the transfer roller changes due to the environment and its usage, thus affecting the image quality.

[0005] In a first aspect, embodiments of this application provide a control method for an image forming apparatus, comprising: acquiring a first voltage value and a status flag bit; determining whether the current voltage state is normal based on the first voltage value and the status flag bit, and acquiring a first determination result; when the first determination result indicates that the current voltage state is abnormal, performing a voltage reduction process to obtain a second voltage value.

[0006] In one embodiment, the first determination result indicating an abnormal current voltage state includes either: the first voltage value and the status flag do not satisfy the condition that the first voltage value does not exceed a first threshold voltage and the status flag indicates normal; or the first voltage value and the status flag satisfy the condition that the first voltage value is not lower than a first threshold voltage and the status flag indicates that the current voltage state is abnormal.

[0007] In one embodiment, performing the voltage reduction process to obtain a second voltage value includes: reducing a first voltage value according to a predetermined rule to obtain a second voltage value; the predetermined rule includes reducing the first voltage value by a rated voltage value based on the first voltage value; or, based on the voltage difference between the first voltage value and the first threshold voltage, reducing the first voltage value according to a mapping relationship between the voltage difference and the voltage reduction magnitude, wherein the mapping relationship between the voltage difference and the voltage reduction magnitude is pre-stored in a memory.

[0008] In one embodiment, after performing the voltage reduction process to obtain the second voltage value, the method further includes: determining whether the second voltage value meets the condition of not exceeding a second threshold voltage value; when it is determined that the second voltage value does not meet the condition of not exceeding the second threshold voltage value, the second voltage value is not changed, and the image forming operation continues to be performed.

[0009] In one embodiment, after performing voltage reduction processing and obtaining a second voltage value, the method further includes: based on the second voltage value, reading the voltage value multiple times at predetermined intervals within a certain period, and calculating the average value of the multiple read voltage values ​​as a third voltage value; determining whether the third voltage value meets the condition of not exceeding a second threshold voltage value; when it is determined that the third voltage value does not meet the condition of not exceeding the second threshold voltage value, obtaining a status flag bit, determining whether the status flag bit indicates that the current voltage state is normal, and obtaining a second judgment result; when the second judgment result indicates that the current voltage state is abnormal, calculating the current load and load current, calculating the load voltage based on the load and the load current, and obtaining the load voltage value; determining whether the load voltage value is not less than a third threshold voltage, and obtaining a third judgment result; when the third judgment result indicates that the load voltage is not less than a third threshold voltage, not changing the second voltage value, and continuing to perform the image forming operation.

[0010] In one embodiment, when the first determination result indicates that the current voltage is abnormal, the process of performing low voltage processing includes: determining whether the first voltage value exceeds a fourth threshold voltage, and determining that the current voltage state indicates at least one of overcurrent, overload, or both overcurrent and overload; when the first voltage value does not exceed the fourth threshold voltage, determining that the current voltage state indicates an overload state; when the first voltage value exceeds the fourth threshold voltage, determining that the current voltage state indicates at least one of overcurrent, overload, or both overcurrent and overload.

[0011] In one embodiment, the first voltage value is determined by turning on the image forming device with a predetermined voltage, reading the voltage value multiple times at predetermined intervals within a certain period, and calculating the average value of the multiple read voltage values ​​as the first voltage value; the status flag bit is a flag bit that indicates that the current voltage status of the image forming device is at least one of a normal state or an abnormal state.

[0012] Secondly, embodiments of this application provide a control device for an image forming apparatus, comprising: a first acquisition unit for acquiring a first voltage value and a status flag bit; a first judgment unit for judging whether the current voltage state is normal based on the first voltage value and the status flag bit, and obtaining a first judgment result; and a voltage reduction unit for performing voltage reduction processing when the first judgment result indicates that the current voltage state is abnormal.

[0013] In one embodiment, the first determination result indicating an abnormal current voltage state includes either: the first voltage value and the status flag do not satisfy the condition that the first voltage value does not exceed a first threshold voltage and the status flag indicates normal operation; or the first voltage value and the status flag satisfy the condition that the first voltage value is not lower than a first threshold voltage and the status flag indicates an abnormal current voltage state.

[0014] In one embodiment, the voltage reduction unit is further configured to reduce a first voltage value according to a predetermined rule, including: a first voltage reduction unit, which reduces the first voltage value to a rated voltage value based on the first voltage value; and a second voltage reduction unit, which reduces the first voltage value based on the voltage difference between the first voltage value and the first threshold voltage, according to a mapping relationship between the voltage difference and the voltage reduction magnitude, wherein the mapping relationship between the voltage difference and the voltage reduction magnitude is pre-stored in a memory.

[0015] In one embodiment, the control device further includes: a first determining unit, which determines whether the second voltage value meets the condition of not exceeding a second threshold voltage value; when it is determined that the second voltage value does not meet the condition of not exceeding the second threshold voltage value, the second voltage value is not changed and the image forming operation is continued; and a third judging unit, which judges whether the load voltage value is not less than a third threshold voltage and obtains a third judging result; when the third judging result indicates that the load voltage is not less than the third threshold voltage, the second voltage value is not changed and the image forming operation is continued.

[0016] In one embodiment, the control device further includes: a first calculation unit, which reads the voltage value multiple times at predetermined intervals within a certain period based on the second voltage value, and calculates the average value of the multiple read voltage values ​​as a third voltage value; a second acquisition unit, which acquires a status flag bit when it is determined that the second voltage value does not meet the condition of not exceeding the second threshold voltage value; a second judgment unit, which judges whether the status flag bit indicates that the current voltage state is normal, and obtains a second judgment result; and a second calculation unit, which calculates the current load and load current, calculates the load voltage based on the load and load current, and obtains the load voltage value when the second judgment result indicates that the current voltage state is abnormal.

[0017] In one embodiment, the voltage reduction unit further includes: a fourth determination unit, which determines whether the first voltage value exceeds a fourth threshold voltage; when the first voltage value exceeds the fourth threshold voltage, it determines that the current voltage state indicates at least one of overcurrent or overload or both; when the first voltage value does not exceed the fourth threshold voltage, it determines that the current voltage state indicates an overload state.

[0018] In one embodiment, the first acquisition unit further includes: a third calculation unit, which turns on the image forming device with a predetermined voltage, reads the voltage value multiple times at predetermined intervals within a certain period, and calculates the average value of the multiple read voltage values ​​to determine the first voltage value.

[0019] Thirdly, embodiments of this application also provide a control device for an image forming apparatus, comprising:

[0020] The third acquisition unit acquires a status flag bit, which indicates that the current voltage state of the image forming device is at least one of a normal state or an abnormal state. The third acquisition unit includes a first conducting element, a second conducting element, a first load element, a second load element, a third load element, and a status flag acquisition port. One end of the first conducting element is connected to current, and the other end is connected to one end of the first load element. The other end of the first load element is connected to the first end of the second conducting element and also to one end of the second load element. The second end of the second conducting element and the other end of the second load element are grounded. The third end of the second conducting element is connected to one end of the third load element. The other end of the third load element is connected to voltage. The status flag acquisition port is connected at any position between the third end of the second conducting element and the other end of the third load element.

[0021] The step-down unit determines whether the current voltage state is normal based on the status flag bit, obtains a fourth determination result, and performs voltage reduction processing when the fourth determination result indicates that the current voltage state is abnormal.

[0022] Fourthly, embodiments of this application also provide an image forming apparatus, including: a memory, a processor, and a computer program;

[0023] The computer program is stored in the memory and configured to be executed by the processor to implement the method described in any of the above-described embodiments.

[0024] Fifthly, embodiments of this application also provide a computer-readable storage medium having a computer program stored thereon, characterized in that the program, when executed, implements the steps of any of the methods described above.

[0025] The embodiments of this application enable the image forming apparatus to reduce the impact of environmental factors and usage conditions on the transfer roller due to its inherent physical characteristics before or during image forming. This allows for voltage reduction based on the status flag, even if the resistance of the transfer roller changes, thus ensuring image quality. This solves the problem of image quality being affected by changes in the resistance of the transfer roller due to environmental factors and usage conditions. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic flowchart illustrating a control method for an image forming apparatus provided in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the structure of a control device for an image forming apparatus provided in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the structure of an acquisition unit in an image forming apparatus provided in an embodiment of this application;

[0030] Figure 4A and Figure 4B This is a schematic diagram of the overall flow of a control method for an image forming apparatus provided in an embodiment of this application;

[0031] Figure 5 This is a schematic flowchart of a pressure reduction processing method provided in an embodiment of this application;

[0032] Figure 6 A schematic flowchart of a control method for another image forming apparatus provided in an embodiment of this application;

[0033] Figure 7 A schematic diagram of the structure of a control device for another image forming apparatus provided in an embodiment of this application. Detailed Implementation

[0034] To better understand the technical solution of this application, the embodiments of this application will be described more comprehensively below in conjunction with the relevant accompanying drawings.

[0035] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0036] In this application embodiment, the image forming apparatus is an apparatus having at least one function related to image forming. These functions may include, but are not limited to, printing, scanning, copying, and faxing functions. For example:

[0037] Single-function printer: An image forming device that only has printing capabilities.

[0038] Multifunction printer: An image forming device with printing, copying, scanning and / or faxing functions, and the number of paper trays can be selectively set.

[0039] Digital multifunction printers: Based on the copying function, they come standard with or have optional printing, scanning, and faxing functions. They use digital technology and laser printing to output documents. They can edit images and text as needed, have a large-capacity paper tray, high memory, large hard drive, strong network support, and multi-tasking capabilities.

[0040] In the aforementioned image forming apparatus, in one feasible embodiment, a toner image formed on the surface of a photosensitive drum in the image forming apparatus is transferred onto a sheet serving as a recording medium, thereby recording an image on the sheet. In another feasible embodiment, the toner image formed on the surface of the photosensitive drum is transferred onto a transfer belt, and the toner image on the transfer belt is further transferred onto the sheet. Typically, regarding the transfer of the toner image, the toner is electrostatically transferred onto the sheet by applying a bias to the transfer roller as the sheet is conveyed by pressing it between the photosensitive drum or transfer belt and the transfer roller. However, due to the physical characteristics of the transfer roller itself, the resistance of the transfer roller varies depending on the environment (temperature and humidity) and the state of use of the image forming apparatus. For example, in a high-temperature and high-humidity environment, the resistance of the transfer roller changes, which affects the magnitude of the actual bias voltage applied to the transfer roller. Therefore, during the process of transferring the toner image on the surface of the photosensitive drum onto the sheet, the image quality is reduced because the actual bias voltage is affected and changes.

[0041] In addition, poor material quality of the transfer roller itself or poor contact during the transfer process can also affect the quality of the transferred image.

[0042] In some implementations, to avoid the influence of the characteristics of the transfer roller itself, or to avoid the load of the transfer roller being affected by the environment and usage conditions of the image forming equipment, or to avoid material quality problems of the transfer roller itself, a hardware protection circuit is set up. This protection circuit will activate a protection mechanism when the load or load voltage reaches a preset threshold. However, once the protection mechanism is activated, in one case, the hardware protection circuit will control the output voltage to be turned off, causing the voltage to be in a normal output state for a period of time and an abnormal output state for a period of time, thereby outputting a voltage waveform such as a square wave, affecting the actual applied bias voltage or current, thus affecting the image quality and causing a reduction in image quality; in another case, it will cause the image forming operation to be interrupted, affecting the image quality and being detrimental to the user experience.

[0043] For the above issues, please refer to... Figure 1 This application provides a control method for an image forming apparatus, which includes the following key steps:

[0044] S10, obtain the first voltage value and status flag bit.

[0045] In one feasible implementation, the first voltage value is determined by turning on the image forming device with a predetermined voltage, reading the voltage value multiple times at predetermined intervals within a certain period after a certain delay, and calculating the average value of the multiple voltage readings. Alternatively, the first voltage value can be a pre-stored voltage value or a voltage value detected and acquired in other ways. For example, the image forming device can be turned on with a predetermined voltage, and after a certain delay, the corresponding voltage value can be read. A table can then be used to find the corresponding set voltage value, i.e., the table stores the mapping relationship between the read voltage value and the set voltage value. Furthermore, the set voltage value can also be a voltage value suitable for a specific paper type, i.e., the table stores the mapping relationship between paper type, read voltage value, and set voltage value.

[0046] In one feasible implementation, a status flag indicates that the current voltage of the image forming device is in at least one of a normal state or an abnormal state. (See reference) Figure 2This application provides a control device 200 for an image forming apparatus. The control device 200 includes: a third acquisition unit 201, which acquires a status flag bit, the status flag bit indicating that the current voltage state of the image forming apparatus is at least one of a normal state or an abnormal state; and a voltage reduction unit 202, which determines whether the current voltage state is normal based on the status flag bit, acquires a fourth determination result, and performs voltage reduction processing when the fourth determination result indicates that the current voltage state is abnormal.

[0047] refer to Figure 3 This application provides an example of the composition structure of a third acquisition unit 201. The third acquisition unit 201 includes a first conducting element D1, a second conducting element Q2, a first load element R1, a second load element R2, a third load element R3, and a status flag acquisition port. One end port 1 of the first conducting element D1 is connected to an input current, and the other end port 2 is connected to one end of the first load element R1. The other end of the first load element R1 is connected to the first end port 1 of the second conducting element Q2 and to one end of the second load element R2. The second end port 2 of the second conducting element Q2 is grounded to the other end of the second load element R2. The third end port 3 of the second conducting element Q2 is connected to one end of the third load element R3. A voltage is applied to the other end of the third load element R3. The status flag acquisition port is connected at any position between the third end port 3 of the second conducting element Q3 and the connection to the other end of the third load element R3.

[0048] In one feasible implementation, the third acquisition unit 201 includes a first conducting element diode D1, a second conducting element transistor Q2, a first load element resistor R1, a second load element resistor R2, a third load element resistor R3, and a status flag acquisition port; one end port 1 of the first conducting element diode D1 is connected to the input current, and the other end port 2 is connected to one end of the first load element R1; the other end of the first load element R1 is connected to the first end port 1 of the second conducting element transistor Q2, and is also connected to one end of the second load element resistor R2; the second end port 2 of the second conducting element diode Q2 and the other end of the second load element resistor R2 are grounded; the third end port 3 of the second conducting element transistor Q2 is connected to one end of the third load element resistor R3; the other end of the third load element resistor R3 is connected to a voltage; the status flag acquisition port is connected at any position between the third end port 3 of the second conducting element transistor Q3 and the other end of the third load element resistor R3. In this embodiment, the second conducting element, transistor Q2, can be an NPN transistor. Port 1 of transistor Q2 is the base, port 2 is the emitter, and port 3 is the collector. In one feasible embodiment, transistor Q2 can also be a PNP transistor. The specific port connections can be adapted according to the specific circuit principle, and no specific limitations are imposed here. In another feasible embodiment, the second conducting element can also be a MOSFET or other conducting element, as long as it achieves the same effect as described above. No specific limitations are imposed on the second conducting element here.

[0049] S20, determine whether the current voltage state is normal based on the first voltage value and the status flag bit, and obtain the first judgment result.

[0050] S30, when the first judgment result indicates that the current voltage state is abnormal, the voltage reduction process is executed.

[0051] In one feasible implementation, when the first judgment result indicates that the current voltage state is abnormal, a voltage reduction process is performed to obtain a second voltage value. The first judgment result indicating that the current voltage state is abnormal includes any of the following conditions: the first voltage value and the status flag do not satisfy the condition that the first voltage value does not exceed a first threshold voltage and the status flag indicates normal operation; or the first voltage value and the status flag satisfy the condition that the first voltage value is not lower than the first threshold voltage and the status flag indicates that the current voltage state is abnormal.

[0052] In one feasible implementation, the voltage reduction process includes the following steps: reducing a first voltage value according to a predetermined rule to obtain a second voltage value; based on the second voltage value, reading the voltage value multiple times at predetermined intervals within a certain period; and calculating the average value of the multiple read voltage values ​​as a third voltage value. The predetermined rule may be to reduce the first voltage value by a certain percentage or voltage value, for example, reducing the first voltage value by 50% based on the first voltage value; alternatively, it may be to reduce the first voltage value based on the voltage difference between the first voltage value and a first threshold voltage, according to a mapping relationship between the voltage difference and the voltage reduction magnitude, wherein the mapping relationship between the voltage difference and the voltage reduction magnitude is pre-stored in a memory.

[0053] In one feasible implementation, after performing the voltage reduction process to obtain the second voltage value, the method further includes: determining whether the second voltage value meets the condition of not exceeding a second threshold voltage value; when it is determined that the second voltage value does not meet the condition of not exceeding the second threshold voltage value, the second voltage value is not changed, and the image forming operation status flag bit is continued to be executed.

[0054] In one feasible implementation, after performing voltage reduction processing and obtaining a second voltage value, the method further includes: based on the second voltage value, reading the voltage value multiple times at predetermined intervals within a certain period, and calculating the average value of the multiple read voltage values ​​as a third voltage value; determining whether the third voltage value meets the condition of not exceeding a second threshold voltage value; when it is determined that the third voltage value does not meet the condition of not exceeding the second threshold voltage value, acquiring a status flag bit, determining whether the status flag bit indicates that the current voltage state is normal, and obtaining a second determination result; when the second determination result indicates that the current voltage state is abnormal, calculating the current load and load current, calculating the load voltage based on the load and the load current, and acquiring the load voltage value; determining whether the load voltage value is not less than a third threshold voltage, and obtaining a third determination result; when the third determination result indicates that the load voltage is not less than a third threshold voltage, not changing the second voltage value, and continuing to perform the image forming operation. Acquiring the status flag bit also includes reading the status flag bit at regular intervals, reading it multiple times consecutively, acquiring multiple status flag bits, and when the status flag bit is identified as abnormal multiple times (e.g., 5 times), determining that the current status flag bit indicates that the current voltage state is abnormal.

[0055] In one feasible implementation, before performing voltage reduction processing when the first determination result indicates that the current voltage state is abnormal, the process includes: determining whether the first voltage value exceeds a fourth threshold voltage, and determining that the current voltage state indicates at least one of overcurrent, overload, or both overcurrent and overload; when the first voltage value does not exceed the fourth threshold voltage, determining that the current voltage state indicates an overload state; when the first voltage value exceeds the fourth threshold voltage, determining that the current voltage state indicates at least one of overcurrent, overload, or both overcurrent and overload.

[0056] In one feasible implementation, the first voltage value is determined by turning on the image forming device with a predetermined voltage, reading the voltage value multiple times at predetermined intervals within a certain period, and calculating the average value of the multiple voltage readings as the first voltage value; the status flag bit is a flag bit that indicates that the current voltage status of the image forming device is at least one of a normal state or an abnormal state.

[0057] In one feasible implementation, the image forming operation is performed normally when the status flag indicates that the current voltage status is normal.

[0058] The control method for an image forming apparatus provided in this application, by detecting a status flag when a minimum current is detected, can determine whether the current voltage state is abnormal. If an abnormal voltage state is detected, it can promptly perform voltage reduction processing, ensuring that the voltage after voltage reduction meets the voltage range required for the actual operation of the image forming apparatus. Thus, even if the transfer roller in the image forming apparatus is affected by the environment and its usage, the applied bias voltage can be guaranteed to meet the actual operating requirements of the image forming apparatus. This not only avoids triggering protection mechanisms but also prevents image quality from being affected by the resistance of the transfer roller, thereby affecting the actual bias voltage. This ensures image quality and improves the user experience.

[0059] Please refer to Figure 4A and Figure 4B This application provides an example of the overall control flow of a control method for an image forming apparatus, the specific steps of which are as follows:

[0060] S401, turn-on voltage.

[0061] In one feasible implementation, a predetermined voltage value is used as the turn-on voltage;

[0062] S402, obtain the first voltage value and status flag bit.

[0063] In one feasible implementation, the image forming apparatus is turned on with a predetermined voltage, and the voltage value is read multiple times at predetermined intervals within a certain period. The average value of the multiple voltage readings is calculated and determined as the first voltage value. A port read status flag is obtained through a status identifier.

[0064] S403, determine whether the first voltage value exceeds the first threshold voltage.

[0065] In one feasible implementation, the first threshold voltage is a preset threshold voltage. In the embodiments provided in this application, the first threshold voltage can be a minimum voltage through which a minimum current flows, such as 600V or 800V. When the first voltage value exceeds the threshold voltage, it indicates that the first voltage value can provide sufficient current to flow, so that the minimum voltage can be detected. When the first voltage value exceeds the threshold voltage, step S404 is executed; otherwise, step S408 is executed.

[0066] S404 determines whether the current voltage status is abnormal.

[0067] In one feasible implementation, the status flag bit read by the port is obtained by identifying the status identifier to determine whether the current voltage status is abnormal; when the current voltage status is determined to be abnormal, step S405 is executed to perform voltage reduction processing; when the current voltage status is determined to be normal, step S409 is executed.

[0068] In one feasible implementation, reference is made to... Figure 5 This application provides a schematic flowchart of a pressure reduction treatment method, including the following steps:

[0069] S501 reduces the current voltage.

[0070] In one feasible implementation, the current first voltage value is stepped down to obtain a second voltage value. Stepping down the current first voltage value includes: reducing it by a predetermined ratio, such as 50%. In another feasible implementation, stepping down the current first voltage value includes: calculating the voltage difference between the current first voltage value and a first threshold voltage, and reducing the first voltage value according to the mapping relationship between the voltage difference and the voltage reduction magnitude (e.g., rated voltage -100, -200, or 20%, 50%, etc.), wherein the mapping relationship between the voltage difference and the voltage reduction magnitude is pre-stored in a memory. In yet another feasible implementation, the voltage difference between the current first voltage value and a first threshold voltage is calculated, and the first voltage value is reduced according to the mapping relationship between the voltage difference, the voltage reduction magnitude, and the paper type, wherein the mapping relationship between the voltage difference, the voltage reduction magnitude, and the paper type is pre-stored in a memory.

[0071] S502, obtain the second voltage value and status flag bit.

[0072] In one feasible implementation, after stepping down the current first voltage value, the reduced first voltage value, i.e., the second voltage value, is used as the turn-on voltage. The voltage value is read multiple times at predetermined intervals within a certain period, and the average of the multiple read voltage values ​​is calculated as the third voltage value, which is then recorded. A status indicator is read multiple times at predetermined intervals within a certain period to determine whether the current voltage status indicator indicates a normal or abnormal state. When multiple consecutive reads of the status indicator indicate that the current voltage state is abnormal, the current voltage state is determined to be abnormal, and the current voltage status indicator is recorded.

[0073] S503, determine whether the third voltage value exceeds the first threshold voltage.

[0074] In one feasible implementation, based on the recorded third voltage value, it is compared with a first threshold voltage. If it is determined that the third voltage value exceeds the first threshold voltage, it indicates that the third voltage value can guarantee a minimum current flow, then step S504 is executed; otherwise, step S506 is executed. Status flag bit.

[0075] S504 determines whether the current voltage status is normal based on the read status flag bits.

[0076] In one feasible implementation, the current voltage state is determined to be normal based on the recorded state identifier. If the current voltage state is normal based on the recorded state identifier, step S505 is executed; if the current voltage state is abnormal based on the recorded state identifier, step S506 is executed.

[0077] S505, calculates the first load and the first load current according to a predetermined method.

[0078] In one possible implementation, different methods can be used to determine the first load and the first load current according to the performance of different devices. The first load and the first load current can be constant values or values calculated according to a predetermined calculation formula. In one possible implementation, the first load and the first load current are calculated according to a predetermined formula. For example, the first load current I1 = (V3 - a1) / a2, where V3 is the voltage value read after the voltage is reduced, that is, the third voltage value, and a1 and a2 are empirical constants. For example, the first load R1 = V2 / I1, where V2 is the voltage value after the first voltage is reduced, that is, the second voltage value. It should be noted that the calculation formulas for the first load and the first load current can be the same or different, and can be linear or non-linear relationships. The specific calculation method is not specifically limited here.

[0079] S506, error handling.

[0080] In one possible implementation, the error message can be displayed on the display screen of the image forming device, such as "Internal device failure", or the error can be reported by voice, or the error can be indicated by an LED indicator, such as different flashing patterns indicating different errors. To prevent users from ignoring the error handling, the user can also be prompted with the error by the indicator while based on the error handling.

[0081] S406, calculate the load voltage.

[0082] In one possible implementation, the load voltage is calculated based on the first load and the first load current to obtain the load voltage value. Specifically, the load voltage is calculated according to a predetermined calculation formula. For example, V_load = R1 * a3 * a4, where a3 is an empirical constant and a4 is a coefficient, 0 < a4 < 1. The load voltage is the maximum safe voltage allowed currently.

[0083] S407, determine whether the load voltage value exceeds the second threshold voltage.

[0084] In one possible implementation, the load voltage value is calculated and obtained based on the first load and the first load current, and it is determined whether the load voltage value exceeds the second threshold voltage. If the load voltage value exceeds the second threshold voltage, return to step S401; otherwise, execute step S408. Among them, the second threshold voltage is an empirical threshold, such as 1000V or 1200V. Determining whether the load voltage exceeds the second threshold voltage is to determine whether the maximum safe voltage allowed currently exceeds the voltage upper limit.

[0085] In one feasible implementation, determining whether the load voltage value exceeds the second threshold voltage can also be done by determining whether the load voltage value is greater than or equal to the second threshold voltage. Here, there is no specific limitation on whether the comparison of values ​​includes equality, as long as the same effect is achieved.

[0086] The first threshold voltage and the second threshold voltage are different threshold voltages, for example, the first threshold voltage is smaller than the second threshold voltage.

[0087] S408, error handling.

[0088] In one feasible implementation, error messages, such as "internal device failure," can be displayed on the screen of the image forming device. Errors can also be announced via voice or indicated by LED indicators, with different flashing patterns indicating different errors. To prevent users from ignoring error handling, the error can also be simultaneously prompted to the user via indicator lights while the error is being processed.

[0089] In one feasible implementation, steps S401 to S408 described above can be a processing flow performed by the image forming device before image forming begins. Steps S401 to S408 as described above ensure that the determined voltage is the voltage required for actual operation. After performing the voltage reduction process, it is determined whether the reduced voltage value meets the voltage range required for actual operation. If the reduced voltage value does not meet the voltage range required for actual operation, the voltage reduction process is repeated until the voltage after the voltage reduction process falls within the voltage range required for actual operation. This ensures that the image forming device can operate normally and is not affected by the environment or the characteristics of the transfer roller itself, thus guaranteeing image quality.

[0090] This application embodiment can determine whether the current voltage state is abnormal by reading the status flag bit when there is a minimum current flowing through it, and promptly reduce the voltage in case of an abnormality. This prevents overcurrent or overload caused by voltage fluctuations, reduces component losses, and solves the problem of image quality being affected by changes in the resistance of the transfer roller due to its environment and usage conditions. Furthermore, by performing the above processing before image formation begins, the problem of image quality being affected by changes in the resistance of the transfer roller due to its environment and usage conditions can be addressed in advance, rather than during or after image formation, thus reducing resource waste.

[0091] S409 detects ambient voltage to determine paper feed voltage.

[0092] In one feasible implementation, a predetermined voltage is used as the environmental detection voltage of the image forming device to perform environmental detection. The voltage value is read multiple times at predetermined intervals within a certain period. The average value of the multiple voltage readings is calculated to determine the paper feed voltage value to be turned on, and the paper feed voltage value is recorded.

[0093] In another feasible implementation, a predetermined voltage is used as the environmental detection voltage of the image forming device to perform environmental detection. The feedback current value is read multiple times at predetermined intervals within a certain period. The average value of the multiple read feedback current values ​​is calculated as the theoretical current value. Based on the mapping relationship between the theoretical current value and the actual voltage value, the actual voltage value is determined as the turn-on voltage.

[0094] S410, obtains the paper feed voltage value and status flag bit.

[0095] S411, determine whether the paper feed voltage value exceeds the first threshold voltage.

[0096] In one feasible implementation, the first threshold voltage is a preset threshold voltage. In the embodiment provided in this application, the first threshold voltage can be the minimum voltage through which a minimum current flows. When the first voltage value exceeds the threshold voltage, it indicates that the first voltage value can provide sufficient current to flow, so that the minimum voltage can be detected. When the first voltage value exceeds the threshold voltage, step S412 is executed; otherwise, step S418 is executed.

[0097] In one feasible implementation, determining whether the paper feed voltage value exceeds the first threshold voltage can also be done by determining whether the paper feed voltage value is greater than or equal to the first threshold voltage. The "exceeding" described in the embodiments of this application is only an example. Whether it is "exceeding", "greater than or equal to", or "less than or equal to", is not specifically limited here, as long as the same effect is achieved.

[0098] S412, determine the current voltage state.

[0099] In one feasible implementation, the current voltage state is determined by identifying the status flag read from the port. When the identified status flag is "0", it indicates that the current voltage state is abnormal, and step S413 is executed; when the identified status flag is "1", it indicates that the current voltage state is normal, and step S419 is executed. It should be noted that the status flags indicating normal and abnormal states can be customized. In addition to "0" indicating abnormal and "1" indicating normal, it can also be "0" indicating normal and "1" indicating abnormal. Other letters, symbols, and numbers can also be used. This is only an example for reference and is not specifically limited.

[0100] S413, determine whether the current voltage exceeds the fourth threshold voltage.

[0101] In one feasible implementation, the current voltage is compared with a fourth threshold voltage to determine whether the current voltage exceeds the fourth threshold voltage. The fourth threshold voltage is an empirical value, which is greater than a second threshold voltage, for example, 2500V or 2900V.

[0102] S414, if the current voltage exceeds the fourth threshold voltage, determine that the current voltage state indicates at least one of overcurrent or overload, and then execute step 405.

[0103] S415, if the current voltage does not exceed the fourth threshold voltage, then determine that the current voltage state indicates an overload state and proceed to step 405.

[0104] S405, Voltage reduction process. Perform voltage reduction process, that is, execute steps S501 to S506, and then execute step S416.

[0105] S416, calculate the load voltage.

[0106] In one feasible implementation, the corresponding load voltage is calculated based on the relationship between the load and the current, using a first load and a first load current. When it is determined that the current voltage exceeds a fourth threshold voltage, the current voltage state is determined to indicate at least one of overcurrent, overload, or both overcurrent and overload. Step-down processing steps S501 to S506 are then executed to acquire the load and calculate the corresponding load voltage according to a predetermined method (the relationship between the load and the current). When it is determined that the current voltage does not exceed the fourth threshold voltage, the current voltage state is determined to indicate an overload state. Step-down processing steps S501 to S506 are then executed to acquire the load and calculate the corresponding load voltage according to a predetermined method (the relationship between the load and the current). It should be noted that for cases where the voltage state indicates different states (overload, overcurrent, or both overload and overcurrent), the relationship between the load voltage and the load, and between the load and the load current, is different; that is, the predetermined method for calculating the corresponding load voltage is different. For example, when the voltage status indicates overcurrent, overload, or both, the relationship between the load voltage and the load is linear, such as V = R * c * d, where c and d are empirical values, and d can be any coefficient between 0 and 1. However, when the voltage status indicates overload, the relationship between the load and the current differs. For instance, when the current is within the range of 0 to 10 MΩ, the current is determined to be the rated current value e. Conversely, when the current is not within the range of 0 to 10 MΩ, the relationship between the current and the load is linear, I = f * R + g, where e, f, and g are empirical values.

[0107] S417 determines whether the load voltage exceeds the third threshold voltage.

[0108] In one feasible implementation, after calculating and obtaining the corresponding load voltage based on the predetermined relationship between load voltage and current, and load and current, the load voltage is obtained, and it is determined whether the load voltage exceeds a third threshold voltage. The third threshold voltage is the minimum voltage required for the normal operation of the image forming device, such as 500V, 700V, or 1200V. When the load voltage exceeds the third threshold voltage, the process returns to step S410; otherwise, step S418 is executed. The third threshold voltage is less than the first threshold voltage, or the fourth threshold voltage is equal to the first threshold voltage.

[0109] In one feasible implementation, determining whether the load voltage exceeds the third threshold voltage can also be done by determining whether the load voltage is greater than or equal to the third threshold voltage. The "exceeding" described in the embodiments of this application is only an example. Whether it is "exceeding", "greater than or equal to", or "less than or equal to", is not specifically limited here, as long as the same effect is achieved.

[0110] S418, Error handling.

[0111] S419, turn off paper feed voltage.

[0112] S420, determine if a next page exists. If a next page exists, return to step S410; otherwise, end the process.

[0113] In one feasible implementation, steps S410-S420 can be a processing flow performed by the image forming device during the image forming process. Steps S410 to S420 as described above ensure that the determined voltage is the voltage required for actual operation. After performing the voltage reduction process, it is determined whether the reduced voltage value meets the voltage range required for actual operation. If the reduced voltage value does not meet the voltage range required for actual operation, the voltage reduction process is repeated until the voltage after the voltage reduction process falls within the voltage range required for actual operation. This ensures that the image forming device can operate normally and is not affected by the environment or the characteristics of the transfer roller itself, thus guaranteeing image quality.

[0114] This application embodiment can determine whether the current voltage state is abnormal by reading the status flag bit when there is a minimum current flowing through it. In case of an abnormality, it can determine whether the current is an overload abnormality, or an overcurrent or overload, or both. It can then promptly reduce the voltage according to the different abnormal situations, thereby preventing overcurrent or overload caused by voltage fluctuations, reducing component losses, and solving the problem that changes in the resistance of the transfer roller due to its environment and usage conditions can affect image quality.

[0115] In one feasible implementation, the control method for the image forming apparatus provided in this application embodiment can also achieve the control method described above by detecting the current and changing the corresponding current value. Any method that achieves the same effect is acceptable, and no specific limitations are imposed here. For example, the control method for the image forming apparatus described above includes acquiring a first current value and a status flag bit, determining whether the current current state is normal based on the first current value and the status flag bit, acquiring a first determination result, and performing current reduction processing when the first determination result indicates that the current current is abnormal.

[0116] Additionally, refer to Figure 6 Embodiments of this application also provide another method for controlling an image forming apparatus, comprising the following steps:

[0117] Steps S601 to S602 are the same as steps S401 to S402, and will not be repeated here.

[0118] S603, determine whether the conditions of the status flag bit being normal and the first voltage value not exceeding the threshold voltage are met.

[0119] Specifically, based on the status flag bit obtained in S602 and the first voltage value, if it is determined that the current voltage is marked as normal and the first voltage value does not exceed the threshold voltage, step S604 is executed; if it is determined that the current voltage is not marked as normal and the first voltage value does not exceed the threshold voltage, step S607 is executed.

[0120] S604 determines whether the paper has left the secondary transfer roller.

[0121] S605, Turn-on voltage. This is the same as step S601 above, and will not be repeated here.

[0122] S606, determine if a next page exists. If a next page exists, return to step S601; if no next page exists, turn off the voltage and end the process.

[0123] S607, voltage reduction treatment.

[0124] When it is determined that the current voltage is not normal and the first voltage value does not exceed the threshold voltage, a voltage reduction process is performed to obtain a second voltage value. The voltage reduction process includes reducing the first voltage value according to predetermined rules, such as reducing the rated voltage value based on the first voltage value, or reducing it by a predetermined percentage, such as 20% or 50%, based on the first voltage value. Alternatively, it may involve calculating the voltage difference between the first voltage value and the first threshold voltage, and reducing the first voltage value based on the mapping relationship between the voltage difference and the voltage reduction magnitude. The mapping relationship between the voltage difference and the voltage reduction magnitude is pre-stored in a memory.

[0125] S608 determines whether the reduced voltage value exceeds the threshold voltage.

[0126] Determine whether the second voltage value obtained after the first voltage value decreases exceeds a second threshold voltage. For example, determine whether the second voltage value exceeds 0V. When the second voltage value exceeds the second threshold voltage, execute step S609; when the second voltage value does not exceed the second threshold voltage, execute step S610.

[0127] S609, error handling.

[0128] S610, complete the processing of the current page. When the processing of the current page is complete, continue to step S605.

[0129] Additionally, embodiments of this application also provide another control device 700 for an image forming apparatus, see reference. Figure 7 The image forming apparatus 700 includes a first acquisition unit for acquiring a first voltage value and a status flag bit; a first judgment unit for judging whether the current voltage state is normal based on the first voltage value and the status flag bit, and obtaining a first judgment result; and a voltage reduction unit for performing voltage reduction processing when the first judgment result indicates that the current voltage state is abnormal.

[0130] In one feasible implementation, the first determination result indicating an abnormal current voltage state includes either: the first voltage value and the status flag do not satisfy the condition that the first voltage value does not exceed a first threshold voltage and the status flag indicates normal; or the first voltage value and the status flag satisfy the condition that the first voltage value is not lower than a first threshold voltage and the status flag indicates an abnormal current voltage state.

[0131] In one feasible implementation, the voltage reduction unit is used to reduce a rated voltage value according to a predetermined rule, comprising: a first voltage reduction unit, which reduces a rated voltage value based on a first voltage value, wherein the rated voltage value can be a constant voltage value or a voltage value at a predetermined ratio; a second voltage reduction unit, which reduces the first voltage value based on the voltage difference between the first voltage value and a first threshold voltage, according to a mapping relationship between the voltage difference and the voltage reduction magnitude, wherein the mapping relationship between the voltage difference and the voltage reduction magnitude is pre-stored in a memory; a first calculation unit, which reads the voltage value multiple times at predetermined intervals within a certain period based on the second voltage value, and calculates the average value of the multiple read voltage values ​​as a third voltage value; a second acquisition unit, which acquires a status flag bit when it is determined that the second voltage value does not meet the condition of not exceeding the second threshold voltage value; a second judgment unit, which judges whether the status flag bit indicates that the current voltage state is normal, and obtains a second judgment result; and a second calculation unit, which calculates the current load and load current, and calculates the load voltage based on the load and load current when the second judgment result indicates that the current voltage state is abnormal, and obtains the load voltage value.

[0132] In one feasible implementation, the control device of the image forming apparatus provided in this application further includes: a first determining unit, which determines whether the second voltage value meets the condition of not exceeding a second threshold voltage value; when it is determined that the second voltage value does not meet the condition of not exceeding the second threshold voltage value, the second voltage value is not changed and the image forming operation is continued; and a third judging unit, which judges whether the load voltage value is not less than a third threshold voltage and obtains a third judging result; when the third judging result indicates that the load voltage is not less than the third threshold voltage, the second voltage value is not changed and the image forming operation is continued.

[0133] In one feasible implementation, the control device of the image forming apparatus provided in this application further includes a fourth determination unit, which determines whether a first voltage value exceeds a fourth threshold voltage. When the first voltage value exceeds the fourth threshold voltage, the current voltage state indicates at least one of overcurrent or overload or both. When the first voltage value does not exceed the fourth threshold voltage, the current voltage state indicates an overload state.

[0134] In one feasible implementation, the first acquisition unit further includes: a third calculation unit, which turns on the image forming device with a predetermined voltage, reads the voltage value multiple times at predetermined time intervals within a certain period, and calculates the average value of the multiple read voltage values ​​to determine the first voltage value; and a flag acquisition unit, which reads a status flag multiple times at predetermined time intervals within a certain period, determines whether the voltage status indicated by the status flag is a normal state or an abnormal state, and determines the current voltage status as abnormal when the status flag indicates an abnormal voltage status after multiple consecutive reads. The flag acquisition unit includes a first conducting element, a second conducting element, a first load element, a second load element, a third load element, and a status flag acquisition port; one end of the first conducting element is connected to current, and the other end is connected to one end of the first load element; the other end of the first load element is connected to the first end of the second conducting element and to one end of the second load element; the second end of the second conducting element and the other end of the second load element are grounded; the third end of the second conducting element is connected to one end of the third load element; the other end of the third load element is connected to voltage; the status flag acquisition port is connected at any position between the third end of the second conducting element and the other end of the third load element.

[0135] In addition, embodiments of this application also provide an image forming apparatus, including a memory, a processor, and a computer program; wherein the computer program is stored in the memory and configured to be executed by the processor to implement the above-described control method of the image forming apparatus.

[0136] Furthermore, embodiments of this application also provide a computer-readable storage medium storing a computer program thereon, characterized in that the program, when executed, implements the steps of the above-described method.

[0137] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the image forming apparatus. In other embodiments of this application, the image forming apparatus may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0138] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the control device of the image forming apparatus. In other embodiments of this application, the control device of the image forming apparatus may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0139] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the image forming apparatus. In other embodiments of this application, the image forming apparatus may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0140] In the description of this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0141] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A control method for an image forming apparatus, characterized in that, include: A first voltage value and a status flag are acquired; wherein, the first voltage value is determined by repeatedly reading the voltage value at predetermined intervals within a certain period when the image forming device is turned on with a predetermined voltage, and calculating the average value of the multiple voltage readings; or, the first voltage value is a pre-stored voltage value; or, the first voltage value is a detected voltage value; the status flag is a flag indicating that the current voltage status of the image forming device is at least one of a normal state or an abnormal state. Based on the first voltage value and the status flag, determine whether the current voltage status is normal, and obtain the first determination result; When the first judgment result indicates that the current voltage state is abnormal, a voltage reduction process is performed to obtain a second voltage value; The first judgment result indicates that the current voltage state is abnormal, including: The first voltage value and the status flag do not satisfy the condition that the first voltage value does not exceed the first threshold voltage and the status flag indicates normal operation; or The first voltage value and the status flag bit satisfy any of the following conditions: the first voltage value is not lower than the first threshold voltage and the status flag bit indicates that the current voltage state is abnormal. The step of performing the voltage reduction process to obtain the second voltage value includes: The first voltage value is reduced according to a predetermined rule to obtain the second voltage value; The predetermined rule includes reducing the first voltage value by a rated voltage value based on the first voltage value; or, Based on the voltage difference between the first voltage value and the first threshold voltage, the first voltage value is reduced according to the mapping relationship between the voltage difference and the voltage reduction magnitude. The mapping relationship between the voltage difference and the voltage reduction magnitude is pre-stored in the memory.

2. The control method according to any one of claims 1, characterized in that, After performing the voltage reduction process to obtain the second voltage value, the process further includes: Determine whether the second voltage value meets the condition of not exceeding the second threshold voltage value; When it is determined that the second voltage value does not meet the condition of not exceeding the second threshold voltage value, the second voltage value is not changed, and the image forming operation continues.

3. The control method according to claim 1, characterized in that, After performing the voltage reduction process to obtain the second voltage value, the process further includes: Based on the second voltage value, the voltage value is read multiple times at predetermined intervals within a certain period, and the average value of the multiple read voltage values ​​is calculated as the third voltage value. Determine whether the third voltage value meets the condition of not exceeding the second threshold voltage value; When it is determined that the third voltage value does not meet the condition of not exceeding the second threshold voltage value, the status flag bit is obtained, and it is determined whether the status flag bit indicates that the current voltage state is normal, and a second judgment result is obtained. When the second judgment result indicates that the current voltage state is abnormal, calculate the current load and load current, calculate the load voltage based on the load and the load current, and obtain the load voltage value; Determine whether the load voltage value is not less than the third threshold voltage, and obtain a third determination result. When the third determination result indicates that the load voltage is not less than the third threshold voltage, do not change the second voltage value and continue to perform the image forming operation.

4. The control method according to claim 1, characterized in that, When the first judgment result indicates that the current voltage state is abnormal, before performing the voltage reduction process, the following steps are included: Determine whether the first voltage value exceeds the fourth threshold voltage, and determine the current voltage state to indicate at least one of overcurrent, overload, or both overcurrent and overload. When the first voltage value does not exceed the fourth threshold voltage, the current voltage state is determined to be in an overload state. When the first voltage value exceeds the fourth threshold voltage, the current voltage state is determined to indicate at least one of overcurrent, overload, or both.

5. A control device for an image forming apparatus, characterized in that, include: The first acquisition unit acquires a first voltage value and a status flag bit; wherein, the first voltage value is determined by repeatedly reading the voltage value at predetermined intervals within a certain period when the image forming device is turned on with a predetermined voltage, and calculating the average value of the multiple read voltage values; or, the first voltage value is a pre-stored voltage value; or, the first voltage value is a detected voltage value; the status flag bit is a flag bit that indicates that the current voltage status of the image forming device is at least one of a normal state or an abnormal state. The first judgment unit determines whether the current voltage state is normal based on the first voltage value and the status flag bit, and obtains a first judgment result; The voltage reduction unit performs voltage reduction processing when the first judgment result indicates that the current voltage state is abnormal. The first judgment result indicates that the current voltage state is abnormal, including: The first voltage value and the status flag do not satisfy the condition that the first voltage value does not exceed the first threshold voltage and the status flag indicates normal operation; or The first voltage value and the status flag bit satisfy any one of the following conditions: the first voltage value is not lower than the first threshold voltage and the status flag bit determines that the current voltage state is abnormal. The voltage reduction unit is further configured to reduce the first voltage value according to a predetermined rule, including: The first step-down unit reduces the first voltage value to a rated voltage value based on the first voltage value; The second step-down unit reduces the first voltage value based on the voltage difference between the first voltage value and the first threshold voltage, according to the mapping relationship between the voltage difference and the voltage reduction magnitude. The mapping relationship between the voltage difference and the voltage reduction magnitude is pre-stored in a memory.

6. The apparatus according to claim 5, characterized in that, The control device further includes: The first determining unit determines whether the second voltage value meets the condition of not exceeding the second threshold voltage value. When it is determined that the second voltage value does not meet the condition of not exceeding the second threshold voltage value, the second voltage value is not changed, and the image forming operation is continued. The third judgment unit determines whether the load voltage value is not less than the third threshold voltage and obtains a third judgment result. When the third judgment result indicates that the load voltage is not less than the third threshold voltage, the second voltage value is not changed and the image forming operation continues to be performed.

7. The apparatus according to claim 5, characterized in that, The step-down unit also includes: The first calculation unit reads the voltage value multiple times at predetermined intervals within a certain period based on the second voltage value, and calculates the average value of the multiple read voltage values ​​as the third voltage value. The second acquisition unit acquires a status flag bit when it determines that the second voltage value does not meet the condition of not exceeding the second threshold voltage value. The second judgment unit determines whether the status flag indicates that the current voltage status is normal, and obtains a second judgment result. The second calculation unit calculates the current load and load current when the second judgment result indicates that the current voltage state is abnormal, calculates the load voltage based on the load and load current, and obtains the load voltage value.

8. The apparatus according to claim 5, characterized in that, The control device further includes: The fourth determination unit determines whether the first voltage value exceeds the fourth threshold voltage. When the first voltage value exceeds the fourth threshold voltage, it determines that the current voltage state indicates at least one of overcurrent or overload, or both. When the first voltage value does not exceed the fourth threshold voltage, it determines that the current voltage state indicates an overload state.

9. The apparatus according to claim 5, characterized in that, The first acquisition unit further includes: The third calculation unit turns on the image forming device with a predetermined voltage, reads the voltage value multiple times at predetermined intervals within a certain period, and calculates the average value of the multiple read voltage values ​​to determine the first voltage value.

10. A control device for an image forming apparatus, characterized in that, include: The third acquisition unit acquires a status flag bit, which indicates that the current voltage status of the image forming device is at least one of a normal state or an abnormal state. The third acquisition unit includes a first conducting element, a second conducting element, a first load element, a second load element, a third load element, and a status indicator acquisition port; one end of the first conducting element is connected to current, and the other end is connected to one end of the first load element; the other end of the first load element is connected to the first end of the second conducting element and also to one end of the second load element; the second end of the second conducting element and the other end of the second load element are grounded; the third end of the second conducting element is connected to one end of the third load element; the other end of the third load element is connected to voltage; the status indicator acquisition port is connected at any position between the third end of the second conducting element and the other end of the third load element. The step-down unit determines whether the current voltage state is normal based on the status flag bit, obtains a fourth determination result, and performs voltage reduction processing when the fourth determination result indicates that the current voltage state is abnormal.

11. An image forming apparatus, characterized in that, This includes memory, processor, and computer programs; The computer program is stored in the memory and configured to be executed by the processor to implement the method as described in any one of claims 1-4.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed, it performs the steps of the method described in any one of claims 1-4.

Images