Intelligent powder spreading system for laser printer

Abstract

The application is suitable for the field of laser printing technology, and provides a laser printer intelligent powder laying system, which comprises a photosensitive element arranged in a laser printer; a reflective transparent mirror arranged in the laser printer, part of laser emitted by a laser emission module passes through the reflective transparent mirror and irradiates on a photosensitive drum of the laser printer, and the other part of the laser is reflected by the reflective transparent mirror and is mapped on the photosensitive element; a charging rod installed on a rack of the laser printer; an intelligent control module; a power control module; the intelligent control module is used for outputting control signals to a photosensitive drum driving module, a transfer roller control module and the power control module according to electrical signal data output by the photosensitive element, so as to adjust the rotating speed of the photosensitive drum and the developing roller and the charge amount of the charging rod, and make the carbon powder on the surface of the photosensitive drum uniformly distributed. The application can avoid the distortion of the image on the printed paper caused by the left-right compression, and ensure that the carbon powder laid on the photosensitive drum can be uniformly distributed.

Description

Technical Field

[0001] This application belongs to the field of laser printing technology, and in particular relates to an intelligent toner spreading system for laser printers. Background Technology

[0002] A laser printer is a printing output device that combines laser scanning technology and electrophotographic technology. Its basic working principle is that binary data information transmitted from a computer is converted into a video signal by a video controller, and then the video signal is converted into a laser drive signal by a video interface / control system. Then, the laser scanning system generates a laser beam carrying character information, and finally, the electrophotographic system images the laser beam and transfers it onto paper.

[0003] After the photosensitive drum is charged by the charging roller and carries a negative charge, it becomes positively charged when irradiated by a laser. The developing roller then transports the negatively charged toner to the positively charged area of ​​the photosensitive drum. At this point, the toner on the photosensitive drum is in a positively discharged state. Then, the negatively charged transfer roller attracts the toner from the photosensitive drum downwards and spreads it onto the printing paper. However, in traditional laser printers, the transfer rollers are entirely negatively charged. This means that when toner is attracted to the lower section of the photosensitive drum, toner from the right side of the lower section is also attracted to the upper section of the transfer roller. This results in the image being compressed laterally on the printing paper, causing output distortion. Furthermore, the rotation speed of the traditional photosensitive drum and developing roller is fixed. When printing large areas of images, the toner distribution on the surface of the photosensitive drum will be uneven. Summary of the Invention

[0004] This application provides an intelligent toner distribution system for laser printers, which can solve the problems of image distortion on laser printer paper due to horizontal compression and uneven toner distribution on the surface of the photosensitive drum.

[0005] This application provides an intelligent toner spreading system for laser printers, including:

[0006] A photosensitive element installed inside a laser printer;

[0007] The reflective transparent mirror inside the laser printer allows part of the laser emitted by the laser emitting module of the laser printer to pass through the reflective transparent mirror and illuminate the photosensitive drum of the laser printer, while the other part is reflected by the reflective transparent mirror and reflected onto the photosensitive element. The distance from the reflective transparent mirror to the bottom of the laser printer is the same as the distance from the photosensitive element to the bottom of the laser printer.

[0008] The charged rod is mounted on the frame of the laser printer and is located inside the transfer roller of the laser printer, at a position corresponding to the lower cut surface of the photosensitive drum.

[0009] The input end of the intelligent control module is electrically connected with the output end of the photosensitive element, and the output end of the intelligent control module is electrically connected with the input end of the photosensitive drum driving module, the input end of the transfer roller control module and the input end of the developing roller driving module of the laser printer respectively;

[0010] The input end of the power control module is electrically connected with the output end of the intelligent control module, and the output end of the power control module is electrically connected with the charging rod.

[0011] The intelligent control module is used for outputting control signals to the photosensitive drum driving module, the transfer roller control module and the power control module according to the electrical signal data output by the photosensitive element, so as to adjust the rotation speed of the photosensitive drum and the developing roller and the charge amount of the charging rod, and make the carbon powder on the surface of the photosensitive drum uniformly distributed.

[0012] Optionally, the distance from the light-reflecting transparent mirror to the photosensitive drum is the same as the distance from the light-reflecting transparent mirror to the photosensitive element.

[0013] Optionally, the length of the photosensitive element in the Z-axis direction is the same as the length of the photosensitive drum in the Z-axis direction, and the pixel density of the photosensitive element in the Z-axis direction is the same as the pixel density of the grid potential of the photosensitive drum in the Z-axis direction; the Z-axis direction is the central axis direction of the photosensitive drum.

[0014] Optionally, when the intelligent control module determines that the number of laser points received by the photosensitive drum in the Z-axis direction exceeds the preset number according to the electrical signal data output by the photosensitive element, and the photosensitive drum rotates 180 degrees in the clockwise direction, the intelligent control module respectively outputs a first control signal to the photosensitive drum driving module, a second control signal to the developing roller driving module and a third control signal to the power control module.

[0015] The first control signal is used for instructing the photosensitive drum driving module to reduce the rotation speed of the photosensitive drum.

[0016] The second control signal is used for instructing the developing roller driving module to increase the rotation speed of the developing roller.

[0017] The third control signal is used for instructing the power control module to increase the charge amount of the charging rod.

[0018] Optionally, the power control module comprises a power supply and a voltage controller.

[0019] The input end of the voltage controller is electrically connected with the output end of the power supply and the output end of the intelligent control module respectively.

[0020] The output end of the voltage controller is electrically connected with the charging rod.

[0021] The voltage controller increases the voltage output by the power supply to the charging rod when the third control signal is received.

[0022] Optionally, the intelligent toner distribution system for laser printers also includes:

[0023] The laser control module has its input terminals electrically connected to the output terminals of the photosensitive element and the feedback terminals of the laser emitting module, respectively, and its output terminals electrically connected to the control terminals of the laser emitting module.

[0024] The laser control module is used to output control signals to the laser emitting module based on the electrical signal data output by the photosensitive element and the electrical signal data fed back by the laser emitting module, so that the laser emitted by the laser emitting module meets the preset accuracy requirements.

[0025] Optionally, the laser control module includes a parameter comparison unit and a laser controller;

[0026] The input terminals of the parameter comparison unit are connected to the output terminal of the photosensitive element and the feedback terminal of the laser emission module, respectively.

[0027] The output terminal of the parameter comparison unit is electrically connected to the input terminal of the laser controller, and the output terminal of the laser controller is electrically connected to the control terminal of the laser emission module.

[0028] The parameter comparison unit is used to compare the electrical signal data output by the photosensitive element and the electrical signal data fed back by the laser emission module, and output the comparison result to the laser controller.

[0029] The laser controller is used to output control signals to the laser emitting module based on the comparison results, so that the laser emitted by the laser emitting module meets the preset accuracy requirements.

[0030] The above-mentioned solution in this application has the following beneficial effects:

[0031] In the embodiments of this application, a charged rod disposed within the transfer roller adsorbs toner from the photosensitive drum onto the printing paper. Compared to the overall size of the transfer roller, the charged rod is located only at the lower cross-section of the photosensitive drum. This ensures that the charged rod only adsorbs toner from the lower cross-section of the photosensitive drum each time, preventing toner from non-lower cross-section areas from prematurely falling onto the printing paper and thus avoiding image distortion due to horizontal compression. Simultaneously, since the rotational speeds of the developing roller and the photosensitive drum, as well as the charge of the charged rod, can be dynamically controlled, it effectively prevents insufficient toner removal when there is a large amount on the photosensitive drum, ensuring that the toner on the photosensitive drum is evenly distributed.

[0032] Other beneficial effects of this application will be described in detail in the following detailed description section. Attached Figure Description

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative effort.

[0034] Figure 1 A schematic diagram of a framework structure of a laser printer intelligent powder spreading system provided by an embodiment of the present application is shown in FIG. 1.

[0035] Figure 2 A schematic diagram of a partial structure of a laser printer provided by an embodiment of the present application is shown in FIG. 2.

[0036] Figure 3 A flowchart of an intelligent powder spreading method provided by an embodiment of the present application is shown in FIG. 3.

[0037]

Explanation of reference numerals

[0038] 100, laser printer; 101, photosensitive element; 102, light reflecting transparent mirror; 103, charging rod; 104, intelligent control module; 105, power supply control module; 106, laser emission module; 107, photosensitive drum; 108, charging roller; 109, developing roller; 110, transfer roller; 111, photosensitive drum driving module; 112, transfer roller control module; 113, developing roller driving module; 114, laser control module; 115, powder bin; 200, printing paper; 201, paper slot. DETAILED DESCRIPTION

[0039] In the following description, specific details are set forth in order to provide a thorough understanding of the embodiments of the present application. However, persons skilled in the art will understand that the present application can be practiced without these specific details. In other instances, well-known methods, structures, circuits, and processes have not been described in detail in order to not unnecessarily obscure the description of the present application.

[0040] It should be understood that the term "comprising" as used in the specification and in the claims indicates the presence of the recited features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0041] It should also be understood that the term "and / or" as used in the specification and in the claims indicates any combination of one or more of the associated listed items and all possible combinations of the items.

[0042] As used in the specification and the appended claims, the term "if' can be interpreted as meaning "when" or "upon" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrase "if it is determined" or "if [the described condition or event] is detected" can be interpreted to mean "upon determining" or "in response to determining" or "upon detecting [the described condition or event]" or "in response to detecting [the described condition or event]" depending on the context.

[0043] In addition, in the description of the present application and the appended claims, the terms "first", "second", "third", etc. are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0044] Reference in the specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, although it can. The terms "comprising", "including", "having" and their variants, mean "including but not limited to", unless otherwise expressly specified and are not excluding additional, unrecited elements or method steps.

[0045] In view of the problems of distortion of the image on the printed paper due to left and right compression and uneven distribution of toner on the surface of the photosensitive drum in the current laser printer, the present application provides a laser printer intelligent toner spreading system. The laser printer intelligent toner spreading system uses a charging rod arranged in the transfer roller to attract the toner on the photosensitive drum to the printed paper. The charging rod is only at the lower cutting surface of the photosensitive drum compared with the size of the entire transfer roller. Thus, the charging rod only attracts the toner at the lower cutting surface of the photosensitive drum each time, thereby avoiding the toner in the non-lower cutting surface area from falling onto the printed paper in advance, and further avoiding distortion of the image on the printed paper due to left and right compression. At the same time, since the rotational speed of the developing roller and the photosensitive drum, and the charge amount of the charging rod can be dynamically controlled, the toner on the photosensitive drum can be effectively prevented from not being completely attracted away when there is too much toner, thereby ensuring that the toner spread on the photosensitive drum can be evenly distributed.

[0046] The laser printer intelligent toner spreading system provided by the present application will be exemplarily described below in conjunction with specific embodiments.

[0047] As Figure 1 and Figure 2As shown, the intelligent powder spreading system of the laser printer provided by the embodiments of the present application comprises a photosensitive element 101 arranged in the laser printer 100, a reflective transparent mirror 102 arranged in the laser printer 100, a charging rod 103 mounted on the frame of the laser printer 100, an intelligent control module 104 and a power control module 105.

[0048] The input end of the intelligent control module 104 is electrically connected with the output end of the photosensitive element 101, the output end of the intelligent control module 104 is electrically connected with the input end of the photosensitive drum driving module 111, the input end of the transfer roller control module 112, the input end of the developing roller driving module 113 and the input end of the power control module 105 of the laser printer respectively, and the output end of the power control module 105 is electrically connected with the charging rod 103.

[0049] Part of the laser emitted by the laser emitting module 106 of the laser printer 100 passes through the reflective transparent mirror 102 and irradiates on the photosensitive drum 107 of the laser printer, and the other part is reflected by the reflective transparent mirror 102 and mapped on the photosensitive element 101. It should be noted that the distance from the reflective transparent mirror 102 to the bottom of the laser printer 100 is the same as the distance from the photosensitive element 101 to the bottom of the laser printer 100. That is, the height of the reflective transparent mirror 102 is consistent with that of the photosensitive element 101. In some embodiments, the photosensitive element 101 can be mounted on the back plate in the laser printer body. The laser emitting module 106 mentioned above can be a laser emitter of the laser printer. During the printing process, the charging roller 108 charges the photosensitive drum 107 to carry a negative charge.

[0050] In some embodiments of the present application, the reflective transparent mirror 102 can reflect 20% of the laser emitted by the emitting module to the photosensitive element 101 and irradiate the other 80% on the photosensitive drum 107. The photosensitive element 101 is mainly used to convert the received laser into an electrical signal. As an optional example, the photosensitive element 101 can be a charge-coupled device (CCD) image sensor, and the reflective transparent mirror 102 can be a reflective transparent lens.

[0051] The charging rod 103 is located in the transfer roller 110 of the laser printer, and the charging rod 103 is located between the central axis of the photosensitive drum 107 and the central axis of the transfer roller 110. That is, the charging rod 103 is located in the transfer roller 110 at a position corresponding to the lower cut surface of the photosensitive drum 107. During the operation of the laser printer, the transfer roller 110 is not charged, and the power supply control module 105 supplies power to the charging rod 103 to make the charging rod 103 negatively charged. Since the charging rod 103 is only located at the lower cut surface of the photosensitive drum 107, only the toner at the lower cut surface of the photosensitive drum 107 is adsorbed to fall on the printing paper 200 each time. Compared with the existing method, this can effectively avoid the toner in the non-lower cut surface area from falling on the printing paper 200 in advance, thereby avoiding the distortion of the image on the printing paper 200 due to left-right compression. The paper slot 201 of the laser printer is used to store unprinted printing paper.

[0052] The intelligent control module 104 is used to output control signals to the photosensitive drum driving module 111, the transfer roller control module 112, and the power supply control module 105 according to the electrical signal data output by the photosensitive element 101, so as to adjust the rotation speed of the photosensitive drum 107 and the developing roller 109 of the laser printer, and the charge amount of the charging rod 103, so that the toner on the surface of the photosensitive drum 107 is uniformly distributed. The developing roller 109 is located between the photosensitive drum 107 and the toner cartridge 115.

[0053] It should be noted that since part of the laser emitted by the laser emitting module 106 is reflected by the reflecting transparent mirror 102 and mapped on the photosensitive element 101, and another part of the laser passes through the reflecting transparent mirror 102 and is irradiated on the photosensitive drum 107, the intelligent control module 104 can estimate the amount of laser received by the photosensitive drum 107 according to the proportional relationship between the two parts, and then adjust the rotation speed of the photosensitive drum 107 and the developing roller 109, and the voltage output by the power supply control module 105 to the charging rod 103, so as to achieve the effect of uniformly distributing the toner on the surface of the photosensitive drum 107.

[0054] In some optional embodiments, the intelligent control module 104 and the power supply control module 105 can also be arranged inside the laser printer.

[0055] In some embodiments of the present application, the distance from the reflecting transparent mirror 102 to the photosensitive drum 107 is the same as the distance from the reflecting transparent mirror 102 to the photosensitive element 101, the length of the photosensitive element 101 in the Z-axis direction is the same as the length of the photosensitive drum 107 in the Z-axis direction, and the pixel density of the photosensitive element 101 in the Z-axis direction is the same as the pixel density of the gate potential of the photosensitive drum 107 in the Z-axis direction.

[0056] For example, the photosensitive element 101 is a charge coupled device (CCD) sensor, and the photosensitive drum 107 is a photodiode. Figure 2As shown in the figure, the three-dimensional coordinate system in which the Z-axis is located is as follows: the X-axis is the direction in which the printing paper 200 travels in the laser printer, the Y-axis direction is the height direction of the laser printer frame, and the Z-axis direction is the central axis direction of the photosensitive drum 107. It should be noted that, Figure 2 The line segment with an arrow indicates the moving direction of the component corresponding to the line segment.

[0057] It should be noted that, since the photosensitive drum 107 and the photosensitive element 101 have the same structural features described above, after receiving the electrical signal data output by the photosensitive element 101 (which can represent the amount of laser received by the photosensitive element 101), the intelligent control module 104 can quickly and accurately determine the number of laser points received by the photosensitive drum 107. For example, if 20% of the laser emitted by the emission module is reflected onto the photosensitive element 101 and the other 80% is incident on the photosensitive drum 107, the number of laser points received by the photosensitive drum 107 can be calculated by the formula . Wherein, represents the amount of laser received by the photosensitive element 101.

[0058] Wherein, when the intelligent control module 104 determines that the number of laser points received by the photosensitive drum 107 in the Z-axis direction exceeds the preset number according to the electrical signal data output by the photosensitive element 101, and the photosensitive drum 107 rotates 180 degrees in the clockwise direction, it respectively outputs a first control signal to the photosensitive drum driving module 111, a second control signal to the developing roller driving module 113, and a third control signal to the power control module 105.

[0059] The first control signal is used to instruct the photosensitive drum driving module 111 to reduce the rotation speed of the photosensitive drum 107; the second control signal is used to instruct the developing roller driving module 113 to increase the rotation speed of the developing roller 109; and the third control signal is used to instruct the power control module 105 to increase the charge amount of the charging rod 103.

[0060] It should be noted that, in the related art of laser printing, the laser emission module 106 emits laser onto the photosensitive drum 107 to form a mark, which is at the topmost position at this time (e.g. Figure 2 ). After the photosensitive drum 107 rotates 180 degrees, the topmost point becomes the lowest point, which can be transferred to the printing paper 200.

[0061] Wherein, in some embodiments of the present application, in order to facilitate the control of the printing process by the intelligent control module 104, the intelligent control module 104 can also output a control signal to the transfer roller control module 112 to control the rotation of the transfer roller 110, thereby driving the printing paper 200 to move.

[0062] It is understandable that the photosensitive drum 107 can rotate 180 degrees clockwise starting from a specific position (such as the initial position, the printing start position, etc.) and rotating 180 degrees clockwise.

[0063] In laser printer technology, a laser beam is emitted onto a photosensitive drum 107, where it "engraves" text. The more text there is, the denser the laser beam becomes. Initially, the laser beam strikes multiple points on the photosensitive drum 107, but now it forms a line along the Z-axis of the drum. For example, a line formed by 100 laser points along the Z-axis of the drum 107 is called 100% photosensitive, and a line formed by 70 laser points is called 70%.

[0064] In some embodiments of this application, the preset number can be 70 laser points. It is understood that the specific value of the preset number is not limited in the embodiments of this application, and it can be set according to actual circumstances.

[0065] It should be noted that when the number of laser points received by the photosensitive drum 107 in the Z-axis direction exceeds 70%, the amount of toner adsorbed by the photosensitive drum 107 in the Z-axis direction at this position is relatively large. After the photosensitive drum 107 rotates 180° clockwise, the speed of the photosensitive drum 107 can be reduced and the speed of the developing roller 109 can be increased, as well as the charge of the charged rod 103 can be increased, to ensure that all the toner is spread on the printing paper 200, and to ensure that the toner spread on the photosensitive drum 107 can be evenly distributed.

[0066] In some embodiments of this application, the transfer roller control module 112 is a drive module for the transfer roller 110 in a laser printer, which drives the transfer roller 110 to rotate according to the control signal of the intelligent control module 104 to achieve the printing function; the photosensitive drum drive module 111 is a drive module for the photosensitive drum 107 in a laser printer, which reduces the rotation speed of the photosensitive drum 107 after receiving the first control signal; the developing roller drive module 113 is a drive module for the developing roller 109 in a laser printer, which increases the rotation speed of the developing roller 109 after receiving the second control signal; and the power control module 105 is mainly used to adjust the input voltage of the charging rod 103.

[0067] In some embodiments of this application, the power control module 105 includes a power supply and a voltage controller. The input terminal of the voltage controller is electrically connected to both the output terminal of the power supply and the output terminal of the intelligent control module 104.

[0068] The output terminal of the voltage controller is electrically connected to the live rod 103.

[0069] When the voltage controller receives the third control signal, it increases the voltage output by the power supply to the electrified rod 103.

[0070] As an optional example, the above-mentioned voltage controller can be a gear adjusting circuit to adjust to a high output gear to increase the charge amount of the electrified rod 103 when it is required to increase the input voltage of the electrified rod 103 (i.e. receiving the above-mentioned third control signal).

[0071] In some embodiments of the present application, as shown in Figure 1 The laser control module 114 is electrically connected to the output end of the photosensitive element 101 and the feedback end of the laser emitting module 106, and outputs a control signal to the control end of the laser emitting module 106.

[0072] The laser control module 114 is mainly used to output a control signal to the laser emitting module 106 according to the electrical signal data output by the photosensitive element 101 and the electrical signal data fed back by the laser emitting module 106, so that the precision of the laser emitted by the laser emitting module 106 meets the preset precision requirement, thereby ensuring the precision of the laser emitted by the laser emitting module 106 and further ensuring the printing quality.

[0073] Specifically, the laser control module 114 includes a parameter comparison unit and a laser controller. The input end of the parameter comparison unit is electrically connected to the output end of the photosensitive element 101 and the feedback end of the laser emitting module 106, the output end of the parameter comparison unit is electrically connected to the input end of the laser controller, and the output end of the laser controller is electrically connected to the control end of the laser emitting module 106.

[0074] The parameter comparison unit is used to compare the electrical signal data output by the photosensitive element 101 and the electrical signal data fed back by the laser emitting module 106, and outputs the comparison result to the laser controller; the laser controller is used to output a control signal to the laser emitting module 106 according to the comparison result, so that the precision of the laser emitted by the laser emitting module 106 meets the preset precision requirement.

[0075] The electric signal data fed back by the laser emitting module 106 can represent the amount of laser emitted by the laser emitting module 106, and the electric signal data output by the photosensitive element 101 can represent the amount of laser received by the photosensitive element 101. The parameter comparison unit is configured to compare the amount of laser emitted by the laser emitting module 106 with the amount of laser received by the photosensitive element 101, and output the comparison result to the laser controller. The laser controller is mainly configured to determine whether the received comparison result reaches the expected receiving amount of the photosensitive element 101 (for example, 20% of the amount of laser emitted by the laser emitting module 106 in the foregoing embodiment), and if the received comparison result is lower than the expected receiving amount, the laser controller outputs a control signal to the laser emitting module 106 to increase the amount of laser emitted by the laser emitting module 106 until the received comparison result reaches the expected receiving amount of the photosensitive element 101, so that the precision of the laser emitted by the laser emitting module 106 meets the preset precision requirement.

[0076] As an optional example, the intelligent control module 104, the parameter comparison unit and the laser controller can all be a processor (such as a central processing unit, a micro control unit, etc.). Preferably, the functions of the intelligent control module 104, the parameter comparison unit and the laser controller can be realized by the same processor, and specifically, the processor of the laser printer.

[0077] The intelligent powder spreading method of the laser printer intelligent powder spreading system will be described below in combination with specific embodiments.

[0078] As shown in Figure 3 The intelligent powder spreading method of the laser printer intelligent powder spreading system comprises the following steps:

[0079] S1, the charging roller charges the photosensitive drum to carry negative charges;

[0080] S2, the laser emitted by the laser emitting module passes through the reflective transparent mirror and is irradiated on the photosensitive drum to form a positive electron region;

[0081] S3, part of the laser is reflected by the reflective transparent mirror and irradiated on the photosensitive element;

[0082] S4, the optical signal received by the photosensitive element is compared with the electric signal input to the laser emitting module;

[0083] S5, whether the precision of the laser emitted by the laser emitting module meets the requirement is predicted through the comparison, and if not, the laser emitted by the laser emitting module is adjusted;

[0084] S6, if the number of laser points received by the photosensitive drum in the Z-axis direction exceeds 70%, and the photosensitive drum rotates 180 degrees in the clockwise direction, the rotation speed of the photosensitive drum is reduced, the rotation speed of the developing roller is increased, and the charge amount of the charging rod is increased.

[0085] In summary, the laser printer intelligent powder laying system of the embodiments of the present application has the following advantages:

[0086] The data fed back by the photosensitive element and the laser emitting module can be used to adjust the laser, so as to ensure the accuracy of the laser emitted by the laser emitting module;

[0087] When the number of laser points received by the photosensitive drum in the Z-axis direction exceeds 70%, the rotation speed of the photosensitive drum can be reduced and the rotation speed of the developing roller can be increased, so as to ensure that the carbon powder laid on the photosensitive drum is uniformly distributed;

[0088] Second, the carbon powder on the photosensitive drum is adsorbed onto the printing paper by the charged rod carrying negative charges, and the charged rod is only located at the lower tangent point of the photosensitive drum. In this way, the charged rod only adsorbs the carbon powder at the lower tangent point of the photosensitive drum each time, avoiding the carbon powder in the non-lower tangent point area from falling onto the printing paper in advance. Moreover, the charge intensity of the charged rod can be dynamically controlled, so as to effectively avoid the carbon powder on the photosensitive drum from not being completely adsorbed when there is too much carbon powder.

[0089] The above is the preferred embodiment of the present application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A laser printer intelligent powder spreading system, characterized in that, The application relates to a laser printer intelligent powder spreading system. The laser printer intelligent powder spreading system comprises the following components: a photosensitive element arranged in a laser printer; a reflecting transparent mirror arranged in the laser printer, part of laser emitted by a laser emission module of the laser printer passes through the reflecting transparent mirror and irradiates on a photosensitive drum of the laser printer, and the other part of the laser is reflected by the reflecting transparent mirror and mapped on the photosensitive element, the distance from the reflecting transparent mirror to the bottom of the laser printer is the same as the distance from the photosensitive element to the bottom of the laser printer; a charging rod mounted on a frame of the laser printer, the charging rod is located in a transfer roller of the laser printer and corresponds to a lower cutting surface of the photosensitive drum; an intelligent control module, an input end of the intelligent control module is electrically connected with an output end of the photosensitive element, and output ends of the intelligent control module are respectively electrically connected with input ends of a photosensitive drum driving module, a transfer roller control module and a developing roller driving module of the laser printer; a power supply control module, an input end of the power supply control module is electrically connected with an output end of the intelligent control module, and an output end of the power supply control module is electrically connected with the charging rod; 2. The laser printer intelligent powder spreading system of claim 1, wherein, the intelligent control module is used for outputting control signals to the photosensitive drum driving module, the transfer roller control module and the power supply control module according to electric signal data output by the photosensitive element, so as to adjust the rotating speed of the photosensitive drum and the developing roller and the charge amount of the charging rod, and make the carbon powder on the surface of the photosensitive drum uniformly distributed.

3. The laser printer intelligent powder spreading system of claim 2, wherein, The distance from the reflecting transparent mirror to the photosensitive drum is the same as the distance from the reflecting transparent mirror to the photosensitive element.

4. The laser printer smart powder spreading system of claim 3, wherein, The length of the photosensitive element in the Z-axis direction is the same as the length of the photosensitive drum in the Z-axis direction, the pixel density of the photosensitive element in the Z-axis direction is the same as the pixel density of the gate potential of the photosensitive drum in the Z-axis direction, and the Z-axis direction is the central axis direction of the photosensitive drum. When the intelligent control module determines that the number of laser points received by the photosensitive drum in the Z-axis direction exceeds a preset number and the photosensitive drum rotates by 180 degrees in the clockwise direction according to the electric signal data output by the photosensitive element, the intelligent control module respectively outputs a first control signal to the photosensitive drum driving module, a second control signal to the developing roller driving module and a third control signal to the power supply control module. The first control signal is used for instructing the photosensitive drum driving module to reduce the rotating speed of the photosensitive drum. The second control signal is used for instructing the developing roller driving module to increase the rotating speed of the developing roller.

5. The laser printer smart powder spreading system of claim 4, wherein, The third control signal is used for instructing the power supply control module to increase the charge amount of the charging rod. The power supply control module comprises a power supply and a voltage controller. An input end of the voltage controller is electrically connected with an output end of the power supply and an output end of the intelligent control module respectively, and an output end of the voltage controller is electrically connected with the charging rod. When the voltage controller receives the third control signal, the voltage controller increases the voltage output by the power supply to the charging rod.

6. The laser printer intelligent powder spreading system of claim 1, wherein, The laser printer intelligent powder spreading system further comprises: A laser control module, input ends of the laser control module are electrically connected with output ends of the light sensing elements and feedback ends of the laser emitting modules respectively, and an output end of the laser control module is electrically connected with a control end of the laser emitting module; The laser control module is used for outputting a control signal to the laser emitting module according to the electrical signal data output by the light sensing elements and the electrical signal data fed back by the laser emitting module, so that the precision of the laser emitted by the laser emitting module meets the preset precision requirement.

7. The laser printer smart powder spreading system of claim 6, wherein, The laser control module comprises a parameter comparison unit and a laser controller; Input ends of the parameter comparison unit are electrically connected with output ends of the light sensing elements and feedback ends of the laser emitting modules respectively, an output end of the parameter comparison unit is electrically connected with an input end of the laser controller, and an output end of the laser controller is electrically connected with a control end of the laser emitting module; The parameter comparison unit is used for comparing the electrical signal data output by the light sensing elements with the electrical signal data fed back by the laser emitting module, and outputting a comparison result to the laser controller; The laser controller is used for outputting a control signal to the laser emitting module according to the comparison result, so that the precision of the laser emitted by the laser emitting module meets the preset precision requirement. ​

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