Printing device and control method thereof
By adding detection components and beam filling components in the LED printer, detecting abnormal LED light sources and filling in the missing beam, the printing incompleteness caused by the LED light beads is solved, and normal printing is achieved and maintenance costs are reduced.
Patent Information
- Application Number
- CN202410121033.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-29
- Publication Date
- 2025-07-29
AI Technical Summary
Due to unstable production process or the heating of the light strip, some LED lamp beads are not lit, resulting in missing light beams, resulting in incomplete printing and high maintenance costs, which affects the progress of printing business.
Add detection components and beam filling components to the LED printer. The detection components detect abnormal LED light sources, and the beam filling components illuminate the beam to the target position during printing operation to fill in the loss of light beams caused by abnormal LED light sources.
It realizes that printing can still be carried out normally when the LED light source is abnormal, avoids printing incompleteness caused by the lack of light beam, reduces maintenance costs, and ensures the continuity of printing services.
Smart Images
Figure CN120386155A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of printing technology, and in particular, to a printing device and a control method thereof. Background Art
[0002] Existing printers can be divided into inkjet printers, laser printer, light emitting diode (LED) printer, etc. Since LED printers do not require a complex optical path system, LED printers have become an important research focus due to their advantages such as small size, low power consumption, and no noise.
[0003] However, due to unstable production processes or lamp bar heating of existing LED printers, some LED lamp beads on the lamp bar may not light up, resulting in the absence of light beams during the exposure process, and thus causing incomplete printing in the form of lines on the paper. Moreover, the manufacturing and repair costs of LED optical machine components are high, and the printer cannot be used during the repair period, which will affect the progress of printing operations. Summary of the Invention
[0004] Embodiments of this application provide a printing device and a control method thereof, which can fill in the missing light beams due to abnormal LED light sources when the LED light sources are abnormal, ensuring the normal progress of printing work.
[0005] In a first aspect, this application provides a printing device, which includes a photosensitive drum, an LED light emitting component, a detection component, a light beam filling component, and a control component. The LED light emitting component includes a plurality of first LED light sources for emitting light beams to irradiate the photosensitive surface of the photosensitive drum; the detection component is used to detect abnormal LED light sources among the plurality of first LED light sources; the light beam filling component is used to irradiate a light beam to a target position on the photosensitive surface during printing, and the target position is the position irradiated by the abnormal LED light source; the control component is communicatively connected to the detection component and the light beam filling component respectively, and is used to control the detection component to detect abnormal LED light sources among the plurality of first LED light sources, and during printing, control the light beam filling component to irradiate a light beam to the target position on the photosensitive surface to fill in the missing light beams at the target position.
[0006] The printing device provided in this application (which can also be referred to as a printer) realizes detecting whether there are abnormal LED light sources in the LED light emitting component by setting the detection component and the light beam filling component. When there are abnormal LED light sources, the light beam filling component fills in the missing light beams due to the abnormal LED light sources, enabling the normal progress of printing work.
[0007] In a possible implementation, the control component is further used to determine abnormal position information, and the abnormal position information includes the position where the abnormal LED light source is located, or the target position.
[0008] The control component records the abnormal position information by detecting the abnormal detection signal fed back by the detection component, facilitating the subsequent beam filling component to fill the missing beam on the photosensitive surface of the photosensitive drum.
[0009] In another possible implementation, the detection component includes a photodetector and a first driving component. The photodetector is used to detect the abnormal LED light source among multiple first LED light sources; the first driving component is used to drive the photodetector to move along a preset path to detect whether each light source among the multiple first LED light sources is abnormal.
[0010] In another possible implementation, the control component is also communicatively connected to the LED lighting component; the control component is used to control the first driving component to drive the photodetector to move to the light emitting path of each first LED light source among the multiple first LED light sources; and when the photodetector moves to the light emitting path of the target first LED light source, control the target first LED light source among the multiple first LED light sources to emit light, so that the photodetector can detect whether the target first LED light source emits light abnormally;
[0011] Alternatively, the control component is used to control the multiple first LED light sources to emit light in sequence, and control the first driving component to drive the photodetector to move to the light emitting path of the first LED light source that receives the light emitting signal among the multiple first LED light sources to detect whether its light emission is normal.
[0012] By scanning and detecting multiple LED light sources in the LED light source component with a photodetector, it can be detected whether there are LED light sources with abnormal light emission in the LED lighting component. If it is detected that all the multiple LED light sources emit light normally, the normal printing process is directly started; if it is detected that there is an LED light source with abnormal light emission (such as not emitting light) in the LED lighting component, the position of the bad point is recorded, providing a basis for the auxiliary beam filling component to fill the beam, and the beam filling component is started to fill the missing beam.
[0013] In one example, the detection component further includes a first guide rail, which is used to define the movement of the photodetector along a preset path. For example, the first guide rail is arranged between the LED lighting component and the photosensitive drum, enabling the photodetector to move to the light emitting path of each LED light source in the LED lighting component to realize the detection of the light emission condition of each LED light source.
[0014] In another possible implementation, the detection component includes a photodetector array and a second driving component. The photodetector array includes a plurality of photodetectors, and each of the plurality of photodetectors is used to detect whether the light emission of each of the plurality of first LED light sources is abnormal; the second driving component is used to drive the plurality of photodetectors to move onto the light emission paths of the plurality of first LED light sources to detect whether each of the plurality of first LED light sources is abnormal.
[0015] For example, the number of photodetectors in the photodetector array is the same as the number of LED light sources in the LED light emitting component. When it is necessary to detect the LED light emitting component, the second driving component drives the photodetector array between the LED light emitting component and the photosensitive drum, so that each photodetector in the photodetector array is respectively located on the light emission paths of each LED light source in the LED light emitting component, quickly detecting the light emission conditions of each LED light source and improving the detection efficiency of the LED light emitting component.
[0016] In another possible implementation, the light beam filling component includes a plurality of second LED light sources and a third driving component. The plurality of second LED light sources include a plurality of LED light sources with normal light emission; the third driving component is used to drive the second LED light sources to move to a first position so that the light beam emitted by the second LED light sources irradiates a target position on the photosensitive surface when emitting light.
[0017] In another possible implementation, the control component is further used to control the third driving component to drive the second LED light sources to move to the first position according to the detection result of the detection component.
[0018] In another possible implementation, the light beam filling component further includes a second guide rail, which is used to define the movement path of the second LED light sources so that the second LED light sources move to the first position.
[0019] Optionally, the plurality of first LED light sources are arranged along the extending direction of the photosensitive drum; the extending direction of the second guide rail is the same as the arranging direction of the plurality of first LED light sources.
[0020] For example, the plurality of LED light sources in the LED light emitting component are evenly spaced and arranged on a substrate, and the extending direction of the substrate is the same as the extending direction of the photosensitive drum. For example, the axis of the substrate is parallel to the axis of the photosensitive drum; the axis of the second guide rail is parallel to the axis of the substrate. That is to say, the axes of the second guide rail and the substrate are both parallel to the axis of the photosensitive drum. In this way, it is convenient for the normally emitting LED light sources carried by the light beam filling component to fill the missing light beam, that is, the light beam emitted by the normally emitting LED light sources irradiates the position on the photosensitive surface of the photosensitive drum where the light beam emitted by the abnormal LED light source should irradiate.
[0021] Second aspect, the present application provides a control method for a printing device, which is applied to control the printing device of the first aspect. The method includes controlling a detection component to detect an abnormal LED light source among a plurality of first LED light sources; if the detection component detects an abnormal LED light source among the plurality of first LED light sources, then controlling a light beam filling component to irradiate a light beam to a target position on a photosensitive surface during printing work to fill the light beam missing at the target position, where the target position is the position irradiated by the abnormal LED light source.
[0022] In a possible implementation, a specific implementation of controlling the detection component to detect an abnormal LED light source among a plurality of first LED light sources is: controlling a first driving component to drive a photodetector to move to the light emitting paths of each of the plurality of first LED light sources; and when the photodetector moves to the light emitting path of a target first LED light source, controlling the target first LED light source among the plurality of first LED light sources to emit light, so that the photodetector detects whether the light emission of the target first LED light source is abnormal;
[0023] Alternatively, the control component is configured to control the plurality of first LED light sources to emit light in sequence, and control the first driving component to drive the photodetector to move to the light emitting path of the first LED light source that receives the light emission signal among the plurality of first LED light sources to detect whether its light emission is normal.
[0024] In another possible implementation, the control method for the printing device provided by the present application further includes determining abnormal position information, where the abnormal position information includes the position where the abnormal LED light source is located, or the position where the abnormal LED light source irradiates the photosensitive surface of the photosensitive drum.
[0025] In another possible implementation, if the detection component detects an abnormal LED light source among the plurality of first LED light sources, then before controlling the light beam filling component to irradiate a light beam to the target position on the photosensitive surface during printing work, it further includes controlling a third driving component to drive the second LED light source to move to a first position according to the abnormal position information, so that the light beam of the second LED light source irradiates the target position on the photosensitive surface when it emits light, where the target position is the position where the abnormal LED light source irradiates the photosensitive surface of the photosensitive drum.
[0026] Third aspect, an embodiment of the present application provides a control component applied to a printing device, including a memory and a processor. Instructions are stored in the memory, and when the instructions are executed by the processor, the method described in the second aspect is implemented.
[0027] Fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method described in the second aspect is implemented.
[0028] Fifth aspect, an embodiment of the present application further provides a computer program or a computer program product, the computer program or the computer program product includes instructions, when the instructions are executed, the computer is made to execute the method described in the second aspect.
[0029] Sixth aspect, an embodiment of the present application further provides a chip, including at least one processor and a communication interface, the processor is used to execute the method described in the second aspect. Description of the Drawings
[0030] Figure 1 It is a schematic diagram of the exposure process principle of an LED printer;
[0031] Figure 2 It is a schematic diagram of the structure of an LED printer;
[0032] Figure 3 It shows a system block diagram of a printer provided by an embodiment of the present application;
[0033] Figure 4 It shows a schematic diagram of the structure of an optical machine component;
[0034] Figure 5 It shows a cross-sectional view of an optical machine component;
[0035] Figure 6 It shows a schematic diagram of a preset path for the movement of a photodetector;
[0036] Figure 7 It shows a cross-sectional view of filling missing light beams in the printing working process of a printer provided by an embodiment of the present application;
[0037] Figure 8 It shows a top view of filling missing light beams in the printing working process of a printer provided by an embodiment of the present application;
[0038] Figure 9 It shows a schematic flowchart of a control method of a printer provided by an embodiment of the present application;
[0039] Figure 10 It is a schematic diagram of the structure of a control device provided by an embodiment of the present application;
[0040] Figure 11 It is a schematic diagram of the structure of a control component provided by an embodiment of the present application. Detailed Embodiments
[0041] The term "and / or" as used herein describes an association relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The symbol " / " in this document indicates that the related objects are in an "or" relationship, for example, A / B means either A or B.
[0042] In the specification and claims herein, the terms "first" and "second" are used to distinguish different objects, rather than to describe a specific order of objects. For example, a first LED light source and a second LED light source are used to distinguish different LED light sources, rather than to describe a specific order of LED light sources.
[0043] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.
[0044] In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more, for example, multiple LED light sources refer to two or more LED light sources, etc.; multiple elements refer to two or more elements, etc.
[0045] In the description of this application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting this application.
[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0047] Figure 1 The following is a schematic diagram of the exposure process principle of an LED printer. Figure 1As shown, the photosensitive drum with a uniformly distributed initial positive charge on its surface rotates, and the display driver IC (DDIC) drives the LED light bar to emit light. The lens array focuses the light beam sent by the LED onto the photosensitive surface of the photosensitive drum, making it photosensitive, removing the unnecessary positive charge, forming an electrostatic latent image on the surface of the photosensitive drum.
[0048] However, due to the existing manufacturing process of the light bar and the temperature rise during the light emission of the light bar, there may be a problem that some LED beads do not emit light, resulting in incomplete printed graphics and texts.
[0049] In view of this, the present application provides an LED printer. By transforming the hardware of the LED printer and adding a detection component and a light beam filling component, the detection component is used to detect whether the LED light source in the LED light-emitting component emits light abnormally. When it is detected that there is an LED light source with abnormal light emission in the LED light-emitting component, the light beam filling component fills the missing light beam due to the abnormal LED light source, thus solving the problems of position detection and light beam filling of the abnormal LED light source in the LED light-emitting component, and enabling the printer to ensure the normal progress of printing operations when some LED light sources in the original LED light-emitting component are abnormal (for example, some LED light sources do not emit light).
[0050] The following describes in detail the LED printer and its control method provided by the embodiments of the present application with reference to the accompanying drawings.
[0051] Figure 2 It is a schematic structural diagram of an LED printer. As Figure 2 shown, the LED printer generally includes a housing 20, and an LED optical machine 21, a charging roller 22, a photosensitive drum 23, a magnetic roller 24, an ink cartridge 25, a transfer shaft 26, and a pressure roller 27 disposed in the housing 20. Among them, the charging roller 22 charges the photosensitive drum 23, so that the surface of the photosensitive drum 23 carries a positive charge. As the photosensitive drum 23 rotates, the LED optical machine 21 irradiates a light beam on the surface of the photosensitive drum 23, making it photosensitive, removing the unnecessary charge, and forming an electrostatic latent image on the surface of the photosensitive drum 23; as the photosensitive drum 23 rotates, the toner with the opposite charge is attracted from the magnetic roller 24 to the latent image on the surface of the photosensitive drum 23 to complete the developing process; as the photosensitive drum 23 rotates, the toner is attracted to the paper by the transfer roller 26, and after being heated by the pressure roller 27, the toner is solidified on the surface of the paper.
[0052] It can be understood that the structure schematically shown in the embodiments of the present application does not constitute a specific limitation on the LED printer. In other embodiments of the present application, the LED printer may further include more or fewer components than those shown in the figure. For example, the LED printer further includes a waste toner bin for collecting the toner dropped from the photosensitive drum; or combining certain components, or splitting certain components, or arranging different components.
[0053] Figure 3 shows a system block diagram of a printer provided by an embodiment of the present application. As Figure 3 shown, the printer provided by the present application includes a control component, an LED optical engine component, a detection component, and a beam filling component. Among them, the LED optical engine component includes a plurality of LED light sources for emitting light beams to irradiate the photosensitive surface of the photosensitive drum to make it photosensitive; the detection component is used to detect abnormal LED light sources among the plurality of light sources; the beam filling component is used to irradiate a light beam to a target position on the photosensitive surface during printing, and the target position is the position irradiated by the abnormal LED light source; the control component is communicatively connected to the detection component and the beam filling component, and is used to control the detection component to detect abnormal LED light sources among the plurality of LED light sources, and during printing, control the beam filling component to irradiate a light beam to the target position on the photosensitive surface to fill the light beam missing at the target position.
[0054] The control component can be understood as the nerve center and command center of the printer, which can generate control signals to control other components (such as the detection component and the beam filling component) to make each component work in coordination. That is to say, the control component is electrically connected to other components that require electrical signal control.
[0055] Optionally, the control component may include a control unit such as a microcontroller unit (MCU) or a central processing unit (CPU).
[0056] The control component is also communicatively connected to the LED optical engine component. The LED optical engine component includes a display driver chip, an LED light emitting component, and a lens component. When printing is required, the control component converts the data signal of the image or text to be printed into an LED drive signal, and sends the LED drive signal to the display driver chip. The display driver chip drives the LED light emitting component to emit light according to the drive signal, and the light beam emitted by the LED light emitting component is focused by the lens component and then irradiated on the photosensitive drum for photosensitive imaging.
[0057] Figure 4 shows a schematic structural diagram of an optical engine component. As Figure 4 shown, the optical engine component includes a display driver chip 211, an LED light emitting component (including a plurality of LED light sources 2121 and a substrate 2122), and a lens component 213. Among them, the display driver chip 211 is used to drive the light emitting component to emit light for scanning. The light emitting component includes a substrate 2122 and a plurality of LED light sources 2121 formed on the substrate 2122. The lens component 213 is disposed on the light emitting path of the plurality of LED light sources 2121 and is used to focus the light beam emitted by the LED light source onto the photosensitive drum.
[0058] Optionally, the multiple LED light sources 2121 can be multiple LED lamp beads, and the multiple LED lamp beads can be evenly arranged at intervals along a straight line. Correspondingly, the substrate 2122 can be a strip structure, and the multiple LED lamp beads are arranged in a straight line on the substrate to form an LED light strip.
[0059] The number of the multiple LED light sources 2121 can be 30, 200, 1000, 10240 or more. The number of LED light sources in the LED light-emitting component can be designed according to the functions and sizes of specific printers, and no specific limitation is made in the embodiments of the present application.
[0060] The multiple LED light sources 2121 can be arranged in a straight line along the axial direction of the photosensitive drum (for example, the central axis of the substrate 2122 is parallel to the central axis of the photosensitive drum), which is convenient for multiple LED light sources to emit light to complete the scanning of a line of printing information on the photosensitive surface of the photosensitive drum during printing work.
[0061] In one example, the substrate 2122 can be a glass substrate, and the glass substrate can provide support for the driving chip and multiple LED lamp beads. The glass substrate can be a rectangular strip structure, and the length direction is set along the axial direction of the photosensitive drum. The size of the glass substrate can be designed according to the functions and required sizes of specific LED optical machines, and no specific limitation is made in the embodiments of the present application.
[0062] After receiving the printing signal from the control unit, the display driving chip 211 can drive the multiple LED lamp beads to turn on or off.
[0063] The lens assembly 213 is arranged on the light-emitting path of the multiple LED lamp beads and is set at a certain distance from the multiple LED lamp beads, and is used to focus the light beams emitted by the multiple LED lamp beads onto the photosensitive surface of the photosensitive drum to form a scanning light spot. The distance between the lens assembly 213 and the LED lamp beads is determined by the focal length of the lens assembly.
[0064] Optionally, the lens assembly 213 includes multiple cylindrical lenses, the number of the cylindrical lenses is determined by the number of the LED lamp beads, and each cylindrical lens is arranged corresponding to each LED lamp bead.
[0065] It can be understood that Figure 4 The structure of the optical machine component shown is only an example. In practice, the optical machine component can also include fewer or more components. For example, it can also include a housing for housing the display driving chip, the LED light-emitting component and the lens assembly.
[0066] Figure 5 Shows a cross-sectional view of an optical machine component. As Figure 5As shown in the figure, the optical-mechanical component includes a housing 214, a lens assembly 213, an LED light-emitting component (including a plurality of LED light sources 2121 and a substrate 2122), and a display driver chip (not shown in the figure). The housing 214 is provided with a cavity, and the lens assembly, the plurality of LED light sources 2121, and the substrate 2122 are all disposed in the cavity.
[0067] One side surface of the housing 214 is provided with an opening communicating with the cavity, and the lens assembly 213 is disposed at the opening of the housing 214 and seals the opening. In one example, the lens assembly includes a frame and a columnar lens array group connected to the frame. The columnar lens array group includes a plurality of columnar lenses arranged in sequence. The number of columnar lenses is the same as the number of LED light sources, and can be 30, 200, 1000, 10240 or more. The axial direction of any columnar lens is perpendicular to the opening surface of the housing 214, that is, parallel to the light-emitting direction of the LED light source.
[0068] The housing 214 can be made of materials such as resin, structural steel, and aluminum, and appropriate materials can be selected according to needs. The embodiments of the present application do not make limitations. The shape of the housing 214 can be, for example, a cuboid structure. The opening of the housing 214 is provided on the length-width surface of the housing, and the opening is a long strip-shaped opening, and its long side is parallel to the central axis of the photosensitive drum.
[0069] In one example, an absorbent layer is provided on the inner wall of the housing 214, and the absorbent layer is used to absorb the scattered light in the cavity. By providing the absorbent layer, the stray light irradiated by the LED light source outside the lens assembly can be absorbed, and the stray light can be prevented from irradiating the photosensitive drum to interfere with imaging. Among them, the absorbent layer can be attached to the inner surface of the housing. Optionally, the absorbent layer can be a polymer film, a metal film, a ceramic film, etc.
[0070] The printer provided by the embodiments of the present application realizes filling the light beam missing due to an abnormal LED light source (for example, an LED lamp bead is not lit) in the LED light-emitting component by additionally adding a detection component and a light beam filling component, so as to ensure the normal progress of the printing work of the LED printer.
[0071] The specific implementation of the detection component and the light beam filling component will be introduced in detail below.
[0072] The detection component may specifically include a photodetector and a first driving component. Among them, the photodetector is used to detect the abnormal LED light source among the plurality of LED light sources; the first driving component is used to drive the photodetector to move along a preset path to detect whether each light source among the plurality of LED light sources is abnormal.
[0073] When it is necessary to detect multiple LED light sources in an LED light-emitting component, the control unit controls the first driving component to drive the photodetector to move along a preset path, so as to move to the light-emitting paths of the respective LED light sources respectively, and the photodetector realizes the detection of the respective LED light sources.
[0074] The preset path is a path for the photodetector to move through between the respective LED light sources in the LED light-emitting component and the photosensitive surface of the photosensitive drum. Figure 6 A schematic diagram of a preset path for the movement of the photodetector is shown. As Figure 6 shown, during the detection process of the detection component, the first driving component drives the photodetector 28 to move along the axial direction of the photosensitive drum 23 and between the LED light source 2121 and the photosensitive drum 23, so that the photodetector 28 can detect the light-emitting conditions of the respective LED light sources (for example, including emitting light or not emitting light), and detect the LED light sources in the LED light source 2121 with abnormal light emission (for example, receiving a light-emitting signal but not lighting up).
[0075] To ensure that the photodetector 28 moves along the preset path, the detection component further includes a first guide rail for defining the movement of the photodetector along the preset path. For example, the first guide rail extends along the axial direction of the photosensitive drum 23 and is arranged between the LED light-emitting component and the photosensitive drum, so that the photodetector can move to the light-emitting paths of the respective LED light sources in the LED light-emitting component, and realize the detection of the light-emitting conditions of the respective LED light sources.
[0076] Back to Figure 3 , the first driving component of the detection component includes a motor driving chip 1 and a motor 1. The control component is communicatively connected to the motor driving chip 1. The control component controls the motor 1 to drive the photodetector to move along the preset path by sending a control signal to the motor driving chip 1.
[0077] During the detection process, the photodetector feeds back a detection signal to the control component in real time, so that the control component can know the light-emitting conditions of the respective LED light sources.
[0078] A detection process of the detection component is as follows:
[0079] The control component sends a control signal to the motor driving chip 1 to control the motor 1 to drive the photodetector to move to the light-emitting paths of the respective LED light sources in the LED light-emitting component; when the photodetector moves to the light-emitting path of a certain LED light source, the control component controls the LED light source to emit light, and the photodetector detects whether the light emission of the LED light source is abnormal, and then feeds back the detection result to the control component. As the photodetector moves, the light-emitting conditions of all the LED light sources in the LED light-emitting component are detected, and the LED light sources with abnormal light emission are found, such as the LED light sources that receive the light-emitting control signal but do not light up.
[0080] Another detection process of the detection component is as follows:
[0081] The control component controls multiple LED light sources in the LED light-emitting component to emit light in sequence, and sends a control signal to the motor drive chip 1 to control the motor 1 to drive the photodetector to move to the light-emitting paths of the respective LED light sources in the LED light-emitting component to detect whether their light emission is normal.
[0082] In another example, the control component is further configured to record abnormal position information according to the detection signal fed back by the photodetector. The abnormal position information includes the position where the abnormal LED light source is located, or the position where the abnormal LED light source irradiates the photosensitive surface of the photosensitive drum when emitting light, or the current position of the photodetector.
[0083] For example, when the photodetector detects and moves to position a and detects that the LED light source 1 emits abnormal light (for example, does not light up), the photodetector feeds back the detection signal to the control component. The control component learns from the fed-back detection signal that the LED light source detected at the current position of the photodetector emits abnormal light. The control component records the current position of the photodetector, that is, the abnormal position a is obtained. ` 。
[0084] For another example, when the photodetector detects and moves to position a and detects that the LED light source 1 emits abnormal light (for example, does not light up), the photodetector feeds back the detection signal to the control component. The control component learns from the fed-back detection signal that the LED light source detected at the current position a of the photodetector emits abnormal light. The control component looks up the mapping table (the mapping table records the mapping relationship between each position of the photodetector and each position of the LED light sources) to obtain the position a of the LED light source 1 ` and records the abnormal position a ` 。
[0085] For another example, when the photodetector detects and moves to position a and detects that the LED light source 1 emits abnormal light (for example, does not light up), the photodetector feeds back the detection signal to the control component. The control component learns from the fed-back detection signal that the LED light source detected at the current position a of the photodetector emits abnormal light. The control component looks up the mapping table (the mapping table records the mapping relationship between each position of the photodetector and each position on the photosensitive surface of the photosensitive drum) to obtain the position where the light beam is missing on the photosensitive surface, and records the abnormal position a'.
[0086] By using a photodetector to scan and detect multiple LED light sources in an LED light source assembly, it is possible to detect whether there are any LED light sources with abnormal light emission in the LED light emitting assembly. If all the LED light sources are detected to emit light normally, the normal printing process is directly started; if an LED light source with abnormal light emission (such as non - emission) is detected in the LED light emitting assembly, the position of the bad pixel is recorded, which provides a basis for the auxiliary light beam filling assembly to fill the light beam, and the light beam filling assembly is started to fill the missing light beam.
[0087] In another example, in order to further improve the detection efficiency of the detection assembly, the photodetector can be a photodetector array. The photodetector array includes multiple photodetectors, and each photodetector in the multiple photodetectors is used to detect whether the light emission of each LED light source in the LED light emitting assembly is abnormal.
[0088] The driving component in the corresponding detection assembly is used to drive the multiple photodetectors to move onto the light emission paths of the multiple LED light sources to detect whether each LED light source in the multiple LED light sources is abnormal.
[0089] For example, the number of photodetectors in the photodetector array is the same as the number of LED light sources in the LED light emitting assembly. When it is necessary to detect the LED light emitting assembly, the driving component drives the photodetector array between the LED light emitting assembly and the photosensitive drum, so that each photodetector in the photodetector array is respectively located on the light emission paths of each LED light source in the LED light emitting assembly, quickly detecting the light emission conditions of each LED light source and improving the detection efficiency of the LED light emitting assembly.
[0090] When the detection assembly detects an abnormal LED light source, for example, it detects that there is a non - lit LED lamp bead in the LED light bar, during the printing operation, the control component controls the light beam filling assembly to fill the light beam missing caused by the abnormal LED light source.
[0091] Since the light beam filling assembly can also emit light beams to irradiate the photosensitive surface of the photosensitive drum to make it photosensitive and form an image, when the LED light source in the LED light source assembly of the optical machine assembly is abnormal, it fills the missing light beam and assists the optical machine assembly to complete the scanning and photosensitive imaging. Therefore, the light beam filling assembly can also be called an auxiliary optical machine, and the optical machine assembly can be called the main optical machine.
[0092] In one example, the light beam filling assembly includes several normally - emitting LED light sources and a third driving component. Among them, the several normally - emitting LED light sources can be several normally - emitting LED lamp beads; the third driving component is used to drive the several normally - emitting LED light sources to move to the first position so that the light beams of the normally - emitting LED light sources irradiate the target position on the photosensitive surface when they emit light.
[0093] In other words, after the light beam filling component detects that there is an abnormal LED light source in the LED light-emitting component in the main optical machine through the detection component, it drives the normal LED light source to move to a specific position through the third driving component. During the printing operation, the normal LED light source emits light and irradiates the position on the photosensitive surface of the photosensitive drum where the light beam is missing due to the abnormal LED light source, filling the missing light beam and avoiding the occurrence of an incomplete latent image caused by the missing light beam.
[0094] Back to Figure 3 , the third driving component of the light beam filling component includes a motor driving chip 2 and a motor 2. The control component sends a control instruction to the motor driving chip 2, and drives the motor 2 to rotate through the motor driving chip 2, thereby driving the normally emitting LED light source to move.
[0095] Exemplarily, the control component detects the LED light source in the main optical machine through the detection component. If an abnormal LED light source is detected, the abnormal position a is recorded ` , and then the control component sends a control signal to the motor driving chip 2 to control the motor 2 to rotate, driving the normal LED light source to move to the position a1. During the printing operation, the normal LED light source is controlled to emit light to fill the missing light beam (see Figure 7 ).
[0096] Optionally, a target mapping table recording the mapping relationship between the abnormal position a ` and the moving position a1 of the normal LED light source is stored in the memory corresponding to the control component. After the control component determines the abnormal position a` according to the detection result, it determines the moving position a1 of the normal light source by looking up the target mapping table, and then sends a control signal to the motor driving chip 2 to control the motor 2 to rotate, driving the normal LED light source to move to the position a1. When the printing operation starts, the normal LED light source is driven to emit light to fill the missing light beam.
[0097] Figure 8 Fig. shows a top view of the printing operation process of a printer provided by an embodiment of the present application for filling a missing light beam.
[0098] For example, after the detection component detects the LED light source of the main optical machine, it is found that the abnormal light sources existing in the LED light-emitting component of the main optical machine include LED light source 1, LED light source 15, and LED light source 22, and the control component determines the abnormal position a `For positions 1, 2, and 3, the control component determines that the abnormal position a` is the positions 1, 2, and 3 respectively by looking up the target mapping table. The moving positions a1 of the normal LED light sources corresponding to positions 1, 2, and 3 are positions 3, 4, and 5 respectively. Then the control component sends a control signal to the motor drive chip 2 to control the rotation of the motor 2, driving the normal LED light source to move to positions 3, 4, and 5. After the normal LED light sources have all moved into place, when the printing work starts, the normal LED light sources are driven to emit light to fill the missing light beam.
[0099] In another example, to ensure that the normal LED light source can smoothly move to the target moving position to fill the missing light beam, the printer provided by the embodiment of the present application is further provided with a second guide rail for defining the moving path of the normal LED light source. That is, the rotation of the motor 2 drives the normal LED light source to move along the second guide rail to move to the position a1.
[0100] Optionally, the extending direction of the second guide rail is the same as the arrangement direction of the multiple LED light sources in the main optical machine. For example, the axis of the second guide rail is parallel to the axis of the substrate where the multiple LED light sources are located. That is to say, the extending direction of the second guide rail and the arrangement direction of the multiple LED light sources in the main optical machine are both the same as the axis direction of the photosensitive drum. In this way, it is ensured that the light spot formed by the normal LED light source that fills the position after moving to the position a1 and irradiating the photosensitive surface of the photosensitive drum is the same as the light spot formed by the abnormal LED light source in the main optical machine irradiating the photosensitive surface of the photosensitive drum, ensuring the front-back consistency of the scanned light spot after the light beam filling, and further ensuring the printing effect.
[0101] The embodiment of the present application also provides a control method for a printer. This control method can be applied to the printer provided by the embodiment of the present application to fill the light beam missing due to the abnormality of the LED light source when the LED light source is abnormal, ensuring the normal progress of the printing work.
[0102] Figure 9 The flowchart of a control method for a printer provided by the embodiment of the present application is shown. This method can be implemented in the control component of the printer to fill the light beam missing due to the abnormality of the LED light source when the LED light source is abnormal, ensuring the normal progress of the printing work.
[0103] In step S901, the control detection component is controlled to detect the abnormal LED light source in the LED light emitting component in the main optical machine.
[0104] As described above, the control component can detect the abnormal LED light source through different detection methods.
[0105] For example, the control component sends a control signal to the motor drive chip 1 to control the motor 1 to drive the photodetector to move to the light-emitting paths of the respective LED light sources in the LED light-emitting component; when the photodetector moves to the light-emitting path of a certain LED light source, the control component controls the LED light source to emit light, and the photodetector detects whether the light emission of the LED light source is abnormal, and then feeds back the detection result to the control component. As the photodetector moves, the light emission conditions of all the LED light sources in the LED light-emitting component are detected to find out the LED light sources with abnormal light emission, such as the LED light sources that receive the light emission control signal but do not emit light.
[0106] For another example, the control component controls multiple LED light sources in the LED light-emitting component to emit light in sequence, and sends a control signal to the motor drive chip 1 to control the motor 1 to drive the photodetector to move to the light-emitting paths of the respective LED light sources in the LED light-emitting component to detect whether their light emission is normal.
[0107] In one example, after receiving the detection signal fed back by the photodetector, the control component records the abnormal position information according to the detection signal fed back by the photodetector. The abnormal position information includes the position where the abnormal LED light source is located, or the position where the abnormal LED light source irradiates the photosensitive surface of the photosensitive drum when it emits light, or the current position of the photodetector.
[0108] For example, when the photodetector moves to position a and detects that the LED light source 1 emits light abnormally (for example, does not emit light), the photodetector feeds back the detection signal to the control component. The control component knows from the fed-back detection signal that the LED light source detected at the current position of the photodetector emits light abnormally, and the control component records the current position of the photodetector, that is, the abnormal position a` is obtained.
[0109] In step S902, if the detection component detects that there is an abnormal LED light source in the LED light-emitting component of the main optical machine, the control beam filling component irradiates a beam to the target position on the photosensitive surface during the printing operation.
[0110] The control component detects the LED light sources in the main optical machine through the detection component. If an abnormal LED light source is detected, the abnormal position a is recorded ` , and then the control component sends a control signal to the motor drive chip 2 to control the motor 2 to rotate, driving the normal LED light source to move to position a1. During the printing operation, the control component controls the normal LED light source to emit light to fill the missing beam.
[0111] Optionally, a target mapping table recording the mapping relationship between the abnormal position a` and the moving position a1 of the normal LED light source is stored in the memory corresponding to the control component. The control component determines the abnormal position a according to the detection result `After that, by looking up the target mapping table, the moving position a1 of the normal light source is determined, and then a control signal is sent to the motor drive chip 2 to control the rotation of the motor 2, driving the normal LED light source to move to the position a1. When the printing work starts, the normal LED light source is driven to emit light to fill the missing light beam.
[0112] The following takes a specific example to describe the working process of the printer receiving the embodiments of the present application.
[0113] Before the printer starts formal printing, the printer first starts the abnormal light source detection program to detect whether the LED lamp beads on the optical engine light bar can emit light normally through the detection component. The control component controls the motor to drive the photodetector to move along the direction of the light bar. When the photodetector moves to a certain position, the control component controls the display drive chip to drive the LED lamp at this position to emit light until the light emission conditions of all the LED lamp beads on the entire light bar are scanned. If the entire light bar emits light normally, the normal printing process is directly started; if it is detected that the LED lamp beads at a specific position do not emit light, the control component records the bad point position, providing a basis for the auxiliary optical engine to fill the missing light beam, and starts the light beam filling program. That is, after the detection component detects the missing light beam, the printer starts the missing light beam filling program. According to the position of the non-emitting LED lamp beads recorded previously, the control component controls the motor to drive the normally emitting LED lamp beads to move to the light beam missing position, and the position where the light beam emitted by the lamp beads on the auxiliary optical engine irradiates is the position where the original missing light beam should irradiate. After all the missing points are filled, the subsequent printing process continues.
[0114] The printer provided by the embodiments of the present application realizes filling the missing light beam caused by the abnormal LED light source by transforming the hardware of the printer, that is, adding a detection component and a light beam filling component, and the corresponding control method, ensuring the normal progress of the printing work. At the same time, in the prior art, when the LED lamp beads in the optical engine component are abnormal (for example, the lamp beads do not light up due to problems such as light bar heating, improper installation, service life, and manufacturing process), the entire optical engine component is generally directly replaced. However, the material cost of the optical engine component is high, accounting for about 1 / 10 of the total machine cost. Replacing the optical engine component will cause huge cost waste. Compared with the prior art, in the embodiments of the present application, when the LED lamp beads in the optical engine component have problems, no components need to be replaced, greatly reducing the maintenance cost; and by detecting the light emission condition of the light bar, when the light beam is missing, the system can realize position detection and light beam filling, making the printed image complete, meeting the customer's need for uninterrupted printing services, and improving the customer experience.
[0115] Based on the same concept as the embodiments of the control method of the foregoing printing device, an embodiment of the present application further provides a control device 1000. The control device 1000 can be deployed in the control component of the printer to implement the control method of the printing device provided in the embodiment of the present application, so as to detect the abnormality of the LED light source in the optical machine component, and when there is an abnormality in the LED light source, fill the missing light beam due to the abnormality of the LED light source to ensure the normal progress of the printing work. The control device 1000 includes units or modules for implementing Figure 9 each step in the control method of the printing device shown.
[0116] Figure 10 It is a schematic structural diagram of a control device provided in an embodiment of the present application. As Figure 10 shown, the control device 1000 includes a detection module 1001 and a light beam filling module 1002. Among them, the detection module 1001 is used to control the detection component to detect the abnormal LED light source among multiple first LED light sources; the light beam filling module 1002 is used to control the light beam filling component to irradiate the light beam to the target position on the photosensitive surface during the printing work if the detection component detects that there is an abnormal LED light source among the multiple first LED light sources, so as to fill the light beam missing at the target position, and the target position is the position irradiated by the abnormal LED light source.
[0117] In a possible implementation, the detection module 1001 is specifically used to control the first driving component to drive the photodetector to move to the light emitting path of each of the multiple first LED light sources; and when the photodetector moves to the light emitting path of the target first LED light source, control the target first LED light source among the multiple first LED light sources to emit light, so that the photodetector detects whether the light emission of the target first LED light source is abnormal;
[0118] Alternatively, the control component is used to control the multiple first LED light sources to emit light in sequence, and control the first driving component to drive the photodetector to move to the light emitting path of the first LED light source that receives the light emission signal among the multiple first LED light sources to detect whether its light emission is normal.
[0119] In another possible implementation, the control device 1000 provided in the present application further includes a determination module 1003, and the determination module is used to determine the abnormal position information, and the abnormal position information includes the position where the abnormal LED light source is located, or the position where the abnormal LED light source irradiates the photosensitive surface of the photosensitive drum.
[0120] In another possible implementation, the light beam filling module 1002 is further configured to control the third driving component to drive the second LED light source to move to the first position according to the abnormal position information, so that when the second LED light source emits light, the light beam irradiates the target position on the photosensitive surface, and the target position is the position where the abnormal LED light source irradiates the photosensitive surface of the photosensitive drum.
[0121] The control device 1000 according to the embodiment of the present application can correspond to execute the method described in the embodiment of the present application, and the above and other operations and / or functions of each module in the control device 1000 are respectively for realizing Figure 9 the corresponding processes of the method in, for the sake of brevity, will not be described in detail herein.
[0122] The embodiment of the present application further provides a control component, including at least one processor, a memory and a communication interface, and the processor is configured to execute Figure 9 the method described above.
[0123] Figure 11 is a schematic structural diagram of the control component provided by the embodiment of the present application.
[0124] As Figure 11 shown, the control component 1100 includes at least one processor 1101, a memory 1102 and a communication interface 1103. Among them, the processor 1101, the memory 1102 and the communication interface 1103 are communicatively connected, and can be communicatively connected by wire (such as a bus) or wirelessly. The communication interface 1103 is used to send and / or receive data sent by other devices; the memory 1102 stores computer instructions, and the processor 1101 executes the computer instructions to at least execute the control method in the foregoing method embodiment to detect the abnormality of the LED light source in the optical machine component, and when the LED light source is abnormal, fill the missing light beam due to the abnormality of the LED light source to ensure the normal progress of the printing work.
[0125] It should be understood that in the embodiment of the present application, the processor 1101 may be a central processing unit CPU, and the processor 1101 may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.
[0126] The memory 1102 may include a read-only memory and a random access memory, and provide instructions and data to the processor 1101. The memory 1102 may also include a non-volatile random access memory.
[0127] The memory 1102 may be a volatile memory, a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM).
[0128] It should be understood that the control component 1100 according to the embodiments of the present application may execute the method implemented in the embodiments of the present application Figure 9 as shown, for a detailed description of the implementation of the method, see the above. For the sake of brevity, it will not be repeated here.
[0129] Embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored. When the computer instructions are executed by a processor, the methods mentioned above are implemented.
[0130] Embodiments of the present application provide a chip, which includes at least one processor and an interface. The at least one processor determines program instructions or data through the interface; the at least one processor is used to execute the program instructions to implement the methods mentioned above.
[0131] Embodiments of the present application provide a computer program or computer program product, which includes instructions that, when executed, cause a computer to perform the methods mentioned above.
[0132] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any one or more embodiments or examples in a suitable manner.
[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A printing device, characterized in that, Comprising: Photoconductive drum; LED light-emitting component, including a plurality of first LED light sources, for emitting light beams to irradiate the photosensitive surface of the photoconductive drum; Detection component, for detecting abnormal LED light sources among the plurality of first LED light sources; Light beam filling component, for irradiating a light beam to a target position on the photosensitive surface during printing, and the target position is the position irradiated by the abnormal LED light source; Control component, communicatively connected to the detection component and the light beam filling component respectively, for controlling the detection component to detect abnormal LED light sources among the plurality of first LED light sources, and during printing, controlling the light beam filling component to irradiate a light beam to the target position on the photosensitive surface to fill the light beam missing at the target position.
2. The device according to claim 1, characterized in that, The control component is further used for determining abnormal position information, and the abnormal position information includes the position where the abnormal LED light source is located, or the target position.
3. The device according to claim 1 or 2, characterized in that, The detection component includes: Photoelectric detector, for detecting abnormal LED light sources among the plurality of first LED light sources; First driving component, for driving the photoelectric detector to move along a preset path to detect whether each light source among the plurality of first LED light sources is abnormal.
4. The device according to claim 3, characterized in that, The control component is also communicatively connected to the LED light-emitting component; The control component is used for controlling the first driving component to drive the photoelectric detector to move to the light-emitting path of each first LED light source among the plurality of first LED light sources; and when the photoelectric detector moves to the light-emitting path of the target first LED light source, controlling the target first LED light source among the plurality of first LED light sources to emit light, so that the photoelectric detector detects whether the target first LED light source emits light abnormally; Alternatively, the control component is used for controlling the plurality of first LED light sources to emit light in sequence, and controlling the first driving component to drive the photoelectric detector to move to the light-emitting path of the first LED light source that receives the light-emitting signal among the plurality of first LED light sources to detect whether its light emission is normal.
5. The device according to claim 3 or 4, characterized in that, The detection component further includes: First guide rail, for defining the movement of the photoelectric detector along the preset path.
6. The device according to claim 1 or 2, characterized in that, The detection component includes: Photoelectric detector array, including a plurality of photoelectric detectors, and each photoelectric detector among the plurality of photoelectric detectors is used for detecting whether each first LED light source among the plurality of first LED light sources emits light abnormally; Second driving component, for driving the plurality of photoelectric detectors to move to the light-emitting paths of the plurality of first LED light sources to detect whether each first LED light source among the plurality of first LED light sources is abnormal.
7. The device according to any one of claims 1-6, characterized in that, The light beam filling component includes: A number of second LED light sources, including a number of LED light sources with normal light emission; Third driving component, for driving the second LED light sources to move to a first position, so that the light beam irradiates the target position on the photosensitive surface when the second LED light sources emit light.
8. The device according to claim 7, characterized in that, The control component is further used for: According to the detection result of the detection component, controlling the third driving component to drive the second LED light sources to move to the first position.
9. The device according to claim 7 or 8, characterized in that, The light beam filling component further includes: The second guide rail is used to define the moving path of the second LED light source so that the second LED light source moves to the first position.
10. The device according to claim 9, characterized in that, The plurality of first LED light sources are arranged along the extending direction of the photosensitive drum; The extending direction of the second guide rail is the same as the arranging direction of the plurality of first LED light sources.
11. A control method for a printing device, characterized in that, Applied to the printing device according to any one of claims 1-10, the method includes: Controlling the detection component to detect an abnormal LED light source among the plurality of first LED light sources; If the detection component detects an abnormal LED light source among the plurality of first LED light sources, then controlling the light beam filling component to irradiate a light beam to a target position on the photosensitive surface during printing work to fill the light beam missing at the target position, where the target position is the position irradiated by the abnormal LED light source.
12. The control method according to claim 11, wherein The controlling the detection component to detect an abnormal LED light source among the plurality of first LED light sources includes: Controlling the first driving component to drive the photodetector to move onto the light emitting paths of each of the plurality of first LED light sources; and when the photodetector moves onto the light emitting path of the target first LED light source, controlling the target first LED light source among the plurality of first LED light sources to emit light so that the photodetector detects whether the light emission of the target first LED light source is abnormal; Alternatively, the control component is used to control the plurality of first LED light sources to emit light in sequence, and control the first driving component to drive the photodetector to move onto the light emitting path of the first LED light source that receives the light emission signal among the plurality of first LED light sources to detect whether its light emission is normal.
13. The control method according to claim 11 or 12, characterized in that, Further includes: Determining abnormal position information, where the abnormal position information includes the position where the abnormal LED light source is located, or the position on the photosensitive surface of the photosensitive drum irradiated by the abnormal LED light source.
14. The control method according to claim 13, characterized in that, Before the step of, if the detection component detects an abnormal LED light source among the plurality of first LED light sources, then controlling the light beam filling component to irradiate a light beam to a target position on the photosensitive surface during printing work, further includes: According to the abnormal position information, controlling the third driving component to drive the second LED light source to move to the first position so that the light beam of the second LED light source irradiates to the target position on the photosensitive surface during light emission, where the target position is the position on the photosensitive surface of the photosensitive drum irradiated by the abnormal LED light source.
15. A control component applied to a printing device, characterized in that, Including a processor and a memory, where instructions are stored in the memory, and when the instructions are executed by the processor, the method according to any one of claims 11-14 is implemented.
16. A computer-readable storage medium, characterized in that, A computer program or instructions are stored in the storage medium, and when the computer program or instructions are executed, the method according to any one of claims 11-14 is implemented.