Method, device and equipment for detecting nozzles of an ink color adjustment irradiation light

Abstract

The application provides a nozzle detection method, device and equipment based on ink color adjusting irradiation light, relates to the field of inkjet printing technology, and solves the problem of inaccurate abnormal nozzle detection result caused by unclear detection graph due to irradiation light source during the detection of the nozzle. The method comprises the following steps: acquiring an irradiation light source sensitive to the color of the ejected ink according to the color of the ejected ink; controlling different nozzles to eject ink of corresponding colors to generate test graphs of corresponding colors in corresponding areas of a printing medium; irradiating the test graphs according to the irradiation light source to acquire test images; and detecting and judging the state of the nozzle according to the test images. The light source sensitive to the corresponding color is acquired according to the ink of different colors, so that the printing marks on the test images can be clear and accurate, and the accuracy of the detection of abnormal nozzles is ensured.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing technology, and in particular to a nozzle detection method, apparatus, and device based on ink color adjustment illumination light. Background Technology

[0002] Inkjet printing refers to the process of ejecting ink droplets from nozzles on a printhead onto a printing medium to obtain printed materials with images or text. However, due to dust and moisture in the printing environment, ink residue in the nozzles, or ink path contamination, inkjet printer printheads can malfunction after prolonged operation. This can manifest as nozzle clogging, oblique spraying, blurry prints, or insufficient ink droplet volume. If these malfunctioning nozzles are not detected in time and the printer continues to use it, it can lead to problems such as streaks and blank areas in the printed image, severely impacting the print quality. Therefore, it is necessary to inspect the printhead nozzles to detect any malfunctions. Existing methods for nozzle malfunction detection involve printing a test image before or during printing, then photographing and analyzing the image to determine the presence and location of malfunctioning nozzles based on the inkjet printing marks. However, in practice, this method often results in incorrect identification of malfunctioning nozzles or an inability to pinpoint their location. Analysis of this problem revealed that the printed marks in the test print contained multiple colors, each with a corresponding color value. However, the camera is only sensitive to a subset of these color values, failing to capture or only partially capturing the colors it is not sensitive to. Consequently, the printed marks of colors the camera is sensitive to are clearly captured, resulting in accurate analysis, while the printed marks of colors the camera is not sensitive to are unclear, leading to inaccurate analysis. Therefore, developing a technology that can easily detect abnormal nozzles is a pressing issue that needs to be addressed. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a nozzle detection method, apparatus, and device based on ink color adjustment illumination light, in order to solve the problem in the existing nozzle detection technology that the incomplete display of ink printing traces of different colors caused by illumination light leads to inaccurate abnormal nozzle detection results.

[0004] In a first aspect, embodiments of the present invention provide a nozzle detection method based on ink color adjustment illumination light, the method comprising:

[0005] Obtaining an illumination light source sensitive to the color of the jet ink includes: obtaining color patch images corresponding to different ink colors; illuminating the color patch images with illumination light sources of different wavelengths and taking pictures of the color patch images; creating a sensitivity table of the color patch images to the illumination light sources of different wavelengths based on the shooting results; and obtaining the illumination light source corresponding to different ink colors based on the sensitivity table.

[0006] Different nozzles are controlled to spray ink of corresponding colors, and a detection map of the corresponding color is generated in the corresponding color area of ​​the printing medium; wherein there is a gap between each color area;

[0007] The detection image is obtained by illuminating the detection image with the illumination light source;

[0008] The nozzle status is determined based on the test image.

[0009] Preferably, the step of controlling different nozzles to eject ink of corresponding colors and generating a detection map of the corresponding color in the corresponding color area of ​​the printing medium includes:

[0010] Based on the ink colors: first color, second color, third color, and fourth color, identify the corresponding inkjet-printed areas on the printing medium: first color area, second color area, third color area, and fourth color area;

[0011] Control the printhead to spray ink of the first color onto the first color area;

[0012] Control the printhead to spray ink of the second color onto the second color area;

[0013] Control the printhead to spray the third color ink onto the third color area;

[0014] The printhead is controlled to spray ink of the fourth color onto the fourth color area.

[0015] Preferably, the step of controlling different nozzles to eject ink of corresponding colors and generating a detection map of the corresponding color in the corresponding color area of ​​the printing medium includes:

[0016] During a one-time scan print, when the printhead moves to the first color area, the printhead is controlled to spray ink of the first color.

[0017] When the printhead moves to the second color area, control the printhead to spray the ink of the second color;

[0018] When the printhead moves to the third color area, the printhead is controlled to spray the ink of the third color;

[0019] When the printhead moves to the fourth color area, the printhead is controlled to spray the ink of the fourth color.

[0020] Preferably, the step of controlling different nozzles to eject ink of corresponding colors and generating a detection map of the corresponding color in the corresponding color area of ​​the printing medium includes:

[0021] Control the printhead to spray ink of the first color onto the first color area;

[0022] Control the printhead to move to the second color area and spray the second color ink;

[0023] Control the printhead to move to the third color area and spray the third color ink;

[0024] Control the printhead to move to the fourth color area and spray the fourth color ink.

[0025] Preferably, the step of illuminating the detection image with the illumination light source to obtain a test image includes:

[0026] The irradiation sequence of the illumination light source is set according to the order of the ink colors in the test pattern;

[0027] The irradiation light source is controlled to irradiate according to the irradiation sequence, and the detection image is captured to obtain the test image.

[0028] Preferably, the step of illuminating the detection image with the illumination light source to obtain a test image includes:

[0029] When photographing the first color area, turn on the illumination light source that is sensitive to the first color;

[0030] When the first color area is captured, the illumination light source is turned off, and the shooting device is moved to the second color area.

[0031] When shooting the second color area, turn on the illumination light source that is sensitive to the second color;

[0032] When the second color area is captured, the illumination light source is turned off, and the shooting device is moved to the third color area.

[0033] When photographing the third color region, turn on the illumination light source that is sensitive to the third color;

[0034] When the third color area is captured, the illumination light source is turned off, and the shooting device is moved to the fourth color area.

[0035] When photographing the fourth color region, turn on the illumination light source that is sensitive to the fourth color.

[0036] Secondly, embodiments of the present invention provide a nozzle detection device based on ink color adjustment illumination light, the device comprising:

[0037] An illumination light source acquisition module is used to acquire an illumination light source sensitive to the color of the jetted ink, including: acquiring color block images corresponding to different ink colors; illuminating the color block images with illumination light sources of different wavelengths and taking pictures of the color block images; creating a sensitivity table of the color block images to the different wavelength illumination light sources based on the shooting results; and acquiring the illumination light source corresponding to different ink colors based on the sensitivity table.

[0038] The printing module is used to control different nozzles to spray ink of the corresponding color and generate a detection map of the corresponding color in the corresponding color area of ​​the printing medium; wherein there is a gap between each of the color areas.

[0039] The imaging module is used to illuminate the detection image according to the illumination light source to acquire a test image.

[0040] The detection module is used to detect and determine the state of the nozzle based on the test image.

[0041] Thirdly, embodiments of the present invention provide a nozzle detection device based on ink color adjustment illumination light, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, wherein when the computer program instructions are executed by the processor, the method of the first aspect described above is implemented.

[0042] Fourthly, embodiments of the present invention provide a storage medium storing computer program instructions, which, when executed by a processor, implement the method of the first aspect described above.

[0043] In summary, the beneficial effects of the present invention are as follows:

[0044] The nozzle detection method, apparatus, and device based on ink color-adjustable illumination light provided in this invention involve: acquiring an illumination light source sensitive to the color of the ejected ink; controlling different nozzles to eject ink of the corresponding color, generating a test image of the corresponding color in the corresponding area of ​​the printing medium; illuminating the test image with the illumination light source to obtain a test image; and detecting and determining the nozzle status based on the test image. By acquiring an illumination light source sensitive to the corresponding color of the ink and photographing the corresponding color area on the test image using the different color-sensitive light sources, the printed marks on the test image are clearly visible, ensuring the accuracy of abnormal nozzle detection. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of the present invention.

[0046] Figure 1 This is a schematic flowchart of the nozzle detection method based on ink color adjustment illumination light according to Embodiment 1 of the present invention.

[0047] Figure 2 This is a schematic flowchart of the nozzle detection method based on ink color adjustment illumination light according to Embodiment 1 of the present invention.

[0048] Figure 3 This is a schematic diagram of a detection image printed by a single scan according to Embodiment 1 of the present invention.

[0049] Figure 4 This is a schematic diagram of the test pattern printed multiple times by the printhead stepping according to Embodiment 1 of the present invention.

[0050] Figure 5 This is a schematic diagram of the nozzle detection device based on ink color adjustment illumination light according to Embodiment 2 of the present invention.

[0051] Figure 6 This is a schematic diagram of the nozzle detection device based on ink color adjustment illumination light according to Embodiment 2 of the present invention.

[0052] Figure 7 This is a schematic diagram of the nozzle detection device based on ink color adjustment illumination light according to Embodiment 3 of the present invention. Detailed Implementation

[0053] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the invention.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this embodiment, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] Example 1

[0056] Please see Figure 1 This invention provides a nozzle detection method based on ink color adjustment illumination light, the method comprising:

[0057] S1: Obtain an illumination light source sensitive to the color of the jet ink;

[0058] S2: Control different nozzles to spray ink of the corresponding color, and generate a detection map of the corresponding color in the corresponding area of ​​the printing medium;

[0059] S3: Irradiate the detection image according to the illumination light source to obtain a test image;

[0060] S4: Detect and determine the nozzle status based on the test image.

[0061] The nozzle detection method, apparatus, and device based on ink color-adjustable illumination light provided in this invention involve: acquiring an illumination light source sensitive to the color of the ejected ink; controlling different nozzles to eject ink of the corresponding color, generating a test image of the corresponding color in the corresponding area of ​​the printing medium; illuminating the test image with the illumination light source to obtain a test image; and detecting and determining the nozzle status based on the test image. By acquiring an illumination light source sensitive to the corresponding color of the ink and photographing the corresponding color area on the test image using the different color-sensitive light sources, the printed marks on the test image are clearly visible, ensuring the accuracy of abnormal nozzle detection.

[0062] like Figure 2As shown, in one embodiment, obtaining an illumination light source sensitive to the color of the jetted ink includes:

[0063] Obtain color block images corresponding to different ink colors;

[0064] The color patch image is then photographed by illuminating the color patch image with light sources of different wavelengths.

[0065] Based on the shooting results, create a table showing the sensitivity of the color patch to the light source of different wavelengths;

[0066] The illumination light source corresponding to different ink colors is obtained according to the sensitivity table.

[0067] Specifically, the printhead is controlled to spray ink of different colors to generate color block images corresponding to different ink colors. The color block images are then illuminated with light sources of different wavelengths and the illumination images are photographed. Based on the photographing results corresponding to different wavelengths of light sources, a sensitivity table of the color block images and different wavelengths of light sources is created.

[0068] Obtain the ink color ejected by the printhead. For example, when the printhead ejects ink of four colors, namely the first color, the second color, the third color, and the fourth color, control the printhead to print ink to generate the first color block image corresponding to the first color, the second color block image corresponding to the second color, the third color block image corresponding to the third color, and the fourth color block image corresponding to the fourth color.

[0069] The first color patch image is illuminated by each of N different wavelength illumination light sources and photographed. Based on the photographing results, a sensitivity relationship between the first color and different wavelength illumination light sources is created, and the sensitivity table based on the first color and different wavelength illumination light sources is called the first sub-sensitivity table.

[0070] The above method is used to obtain a second sub-sensitivity table for the second color and different wavelengths of illumination light sources, a third sub-sensitivity table for the third color and different wavelengths of illumination light sources, and a fourth sub-sensitivity table for the fourth color and different wavelengths of illumination light sources. The first sub-sensitivity table, the second sub-sensitivity table, the third sub-sensitivity table and the fourth sub-sensitivity table form a color block diagram corresponding to the ink color and a sensitivity table for different wavelengths of illumination light sources. The illumination light source corresponding to each ink color is obtained according to the sensitivity table.

[0071] The sensitive illumination source refers to a light source that can make the colors of the printed ink clearer and more distinct.

[0072] Obtaining the color of the ink and its corresponding color value allows for a more accurate identification of the light source that makes the ink color sensitive.

[0073] In one embodiment, controlling different nozzles to eject ink of corresponding colors to generate a detection map of the corresponding color in the corresponding area of ​​the printing medium includes:

[0074] Based on the ink colors: first color, second color, third color, and fourth color, identify the corresponding inkjet-printed areas on the printing medium: first color area, second color area, third color area, and fourth color area;

[0075] Control the printhead to spray ink of the first color onto the first color area;

[0076] Control the printhead to spray ink of the second color onto the second color area;

[0077] Control the printhead to spray the third color ink onto the third color area;

[0078] The printhead is controlled to spray ink of the fourth color onto the fourth color area.

[0079] Specifically, the position of the nozzle corresponding to the first color being sprayed on the printhead is obtained, such as obtaining the position of the nozzle spraying the first color, the position of the nozzle spraying the second color, the position of the nozzle spraying the third color, and the position of the nozzle spraying the fourth color. Based on the positions, the spraying order of different colors of ink during the printhead spraying process is determined, for example, the first color ink is sprayed first, the second color ink is sprayed second, the third color ink is sprayed third, and the fourth color ink is sprayed fourth. Based on the spraying order of different colors of ink, the ink spraying areas of different colors on the printing medium are obtained, and the printhead is controlled to spray ink onto the corresponding ink spraying areas on the printing medium according to the ink spraying order, printing to generate different color areas. All the color areas printed by the same printhead are the detection pattern corresponding to the printhead.

[0080] In one embodiment, controlling different nozzles to eject ink of corresponding colors and generating a detection map of the corresponding color in the corresponding color area of ​​the printing medium includes:

[0081] During a one-time scan print, when the printhead moves to the first color area, the printhead is controlled to spray ink of the first color.

[0082] When the printhead moves to the second color area, control the printhead to spray the ink of the second color;

[0083] When the printhead moves to the third color area, the printhead is controlled to spray the ink of the third color;

[0084] When the printhead moves to the fourth color area, the printhead is controlled to spray the ink of the fourth color.

[0085] like Figure 3 As shown, printhead J performs a single scan and print in the scanning and printing direction X, controlling the nozzles that eject the corresponding colors to spray ink onto the corresponding areas of the printing medium, generating color areas corresponding to different colors, such as... Figure 3 As shown, the color areas include a first color area, a second color area, a third color area, and a fourth color area. The first color area, the second color area, the third color area, and the fourth color area constitute the detection diagram of the abnormal nozzle of the nozzle J.

[0086] In one embodiment, the control of different nozzles to spray ink of corresponding colors is used to control the printhead to spray ink of the first color onto the first color area in the corresponding area of ​​the printing medium;

[0087] Control the printhead to move to the second color area and spray the second color ink;

[0088] Control the printhead to move to the third color area and spray the third color ink;

[0089] Control the printhead to move to the fourth color area and spray the fourth color ink.

[0090] Specifically, such as Figure 4 As shown, the preset distance is greater than or equal to the height of the printhead in direction N, ensuring that there is no overlap between the images printed by the printhead J when inkjet printing in two color areas, thus avoiding affecting the judgment of abnormal nozzles.

[0091] In one embodiment, the step of illuminating the detection map with the illumination light source to obtain a test image includes:

[0092] The irradiation sequence of the illumination light source is set according to the order of the ink colors in the test pattern;

[0093] The irradiation light source is controlled to irradiate according to the irradiation sequence, and the detection image is captured to obtain the test image.

[0094] Specifically, the illumination order of the light source is set according to the order in which different color areas on the detection image are captured, and the corresponding color areas are illuminated during the capture according to the illumination order to obtain the detection image.

[0095] In one embodiment, the step of illuminating the detection map with the illumination light source to obtain a test image includes:

[0096] When photographing the first color area, turn on the illumination light source that is sensitive to the first color;

[0097] When the first color area is captured, the illumination light source is turned off, and the shooting device is moved to the second color area.

[0098] When shooting the second color area, turn on the illumination light source that is sensitive to the second color;

[0099] When the second color area is captured, the illumination light source is turned off, and the shooting device is moved to the third color area.

[0100] When photographing the third color region, turn on the illumination light source that is sensitive to the third color;

[0101] When the third color area is captured, the illumination light source is turned off, and the shooting device is moved to the fourth color area.

[0102] When photographing the fourth color region, turn on the illumination light source that is sensitive to the fourth color.

[0103] Specifically, different illumination light sources are set. After the illumination and shooting of the first color area are completed, the corresponding illumination light source is turned off, and the shooting device is controlled to move to the second color area for illumination and shooting. When the second color area is reached, the illumination light source corresponding to the second color area is turned on, and the shooting device is controlled to shoot. The above actions are repeated until the shooting of the indicated color area is completed, and the detection image corresponding to the nozzle to be detected is obtained. The detection image is observed to determine whether there is nozzle abnormality and the location and number of abnormal nozzles.

[0104] In one embodiment, the step of illuminating the detection map with the illumination light source to obtain a test image includes:

[0105] The illumination light source is adjusted so that the light emitted by the light source device has the required wavelength of color. When illuminating different color areas, the corresponding wavelength of color is adjusted according to the color of the corresponding color area.

[0106] In one embodiment, the step of illuminating the detection map with the illumination light source to obtain a test image includes:

[0107] Based on the color of the ejected ink, obtain the color of the sensitive light source corresponding to different colors of ink. Install the corresponding color and number of illumination light sources according to the number of colors of the sensitive light sources. For example, in four-color printing, install four sensitive light sources corresponding to the four colors. During shooting, the sensitive light source corresponding to the color of the color area to be photographed is activated, and other light sources are turned off to illuminate and photograph the color area.

[0108] In one embodiment, there is a certain distance between the two color regions to ensure that the two adjacent color regions are not connected, so as to ensure that the detection image obtained by illumination and shooting is clear and accurate, and to ensure the accuracy of the judgment result.

[0109] In one embodiment, the color area has a certain width in the scanning and printing direction to ensure that the corresponding nozzle can continuously output long ink, and to ensure that any abnormality in the nozzle can be detected.

[0110] In one embodiment, when printing the color area, multiple color areas are sprayed by nozzles that spray the same ink color. The color areas are then irradiated and photographed to reduce errors in the inkjet and detection processes and ensure the accuracy of the detection results.

[0111] In one embodiment, the nozzle state of the nozzle head is detected and determined based on the test image.

[0112] Based on the acquired detection images, determine whether there are any abnormalities in the nozzles on the nozzle head to be detected, and the location and number of abnormal nozzles.

[0113] Example 2

[0114] See Figure 5 This invention provides a nozzle detection device based on ink color adjustment illumination light, the device comprising:

[0115] Irradiation light source acquisition module 1 is used to acquire an illumination light source sensitive to the color of the jet ink.

[0116] Printing module 2 is used to control different nozzles to spray ink of the corresponding color, and generate a detection map of the corresponding color in the corresponding color area of ​​the printing medium.

[0117] The imaging module 3 is used to illuminate the detection image according to the illumination light source to acquire a test image.

[0118] The detection module 4 is used to detect and determine the nozzle status of the nozzle based on the test image.

[0119] like Figure 6 As shown, the device further includes:

[0120] Color block image module 101 is used to obtain color block images of corresponding colors according to different ink colors;

[0121] The imaging module 102 is used to illuminate the color block image with light sources of different wavelengths and then capture the color block image.

[0122] The creation module 103 is used to create a sensitivity table of the color block image to the light source of different wavelengths based on the shooting results;

[0123] The light source acquisition module 104 is used to acquire the illumination light source corresponding to different ink colors according to the sensitivity table.

[0124] Example 3

[0125] In addition, combined Figure 1 The nozzle detection method for ink color adjustment illumination light described in the present invention can be implemented using a nozzle detection device for ink color adjustment illumination light. Figure 5 A schematic diagram of the hardware structure of a nozzle detection device for ink color adjustment illumination light provided in an embodiment of the present invention is shown.

[0126] The nozzle detection device for adjusting ink color illumination light may include a processor and a memory storing computer program instructions.

[0127] Specifically, the processor may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement embodiments of the present invention.

[0128] The memory may include a large-capacity storage device for data or instructions. For example, and not limitingly, the memory may include a hard disk drive (HDD), a floppy disk drive, flash memory, an optical disk drive, a magneto-optical disk drive, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory may include removable or non-removable (or fixed) media. Where appropriate, the memory may be internal or external to a data processing device. In a particular embodiment, the memory is a non-volatile solid-state memory. In a particular embodiment, the memory includes a read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0129] The processor reads and executes computer program instructions stored in the memory to implement any of the nozzle detection methods for ink color adjustment illumination light in the above embodiments.

[0130] In one example, the nozzle detection device for adjusting ink color illumination light may also include a communication interface and a bus. For example, Figure 5 As shown, the processor, memory, and communication interface are connected via a bus and communicate with each other.

[0131] The communication interface is mainly used to enable communication between various modules, devices, units and / or equipment in the embodiments of the present invention.

[0132] A bus, including hardware, software, or both, couples together components of a nozzle detection device that will illuminate the ink color adjustment light. For example, and not limitingly, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, a bus may include one or more buses. While specific buses are described and illustrated in embodiments of the invention, the invention contemplates any suitable bus or interconnect.

[0133] Furthermore, in conjunction with the nozzle detection method for ink color adjustment illumination light in the above embodiments, this invention can be implemented using a computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when executed by a processor, these computer program instructions implement any of the nozzle detection methods for ink color adjustment illumination light in the above embodiments.

[0134] In summary, the nozzle detection method, apparatus, and device based on ink color adjustment illumination provided by the embodiments of the present invention obtain an illumination light source sensitive to the color of the ejected ink; control different nozzles to eject ink of the corresponding color, generating a detection map of the corresponding color in the corresponding area of ​​the printing medium; illuminate the detection map with the illumination light source to obtain a test image; and detect and determine the nozzle status based on the test image. By obtaining an illumination light source sensitive to the corresponding color of ink based on different colors of ink, and taking pictures of the corresponding color areas on the detection map with different color-sensitive light sources to obtain detection images, the printing marks on the detection images can be clearly seen, ensuring the accuracy of abnormal nozzle detection.

[0135] It should be clarified that the present invention is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of the present invention.

[0136] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this invention are programs or code segments used to perform the required tasks. The programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0137] It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0138] The above description is merely a specific embodiment of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A nozzle detection method based on ink color adjustment illumination light, characterized in that, The method includes: Obtaining an illumination light source sensitive to the color of the jetted ink includes: obtaining a color patch image corresponding to different ink colors; illuminating the color patch image with illumination light sources of different wavelengths and taking a picture of the color patch image; creating a sensitivity table of the color patch image color and the illumination light sources of different wavelengths based on the shooting results; and obtaining the illumination light source corresponding to different ink colors based on the sensitivity table. Different nozzles are controlled to spray ink of corresponding colors, and a detection map of the corresponding color is generated in the corresponding color area of ​​the printing medium; wherein there is a gap between each color area; The test image is obtained by illuminating the detection map with the illumination light source, including: The irradiation sequence of the illumination light source is set according to the order of the ink colors in the test pattern; The process of controlling the illumination light source to illuminate and capture the detection image according to the illumination sequence to obtain a test image includes: when capturing a corresponding color area, turning on an illumination light source sensitive to that color; when capturing the color area is completed, turning off the illumination light source and controlling the capturing device to move to the next color area for capturing; The nozzle status is determined based on the test image.

2. The nozzle detection method based on ink color adjustment illumination light according to claim 1, characterized in that, The process of controlling different nozzles to eject ink of corresponding colors and generating a detection map of the corresponding color in the corresponding color area of ​​the printing medium includes: Based on the ink colors: first color, second color, third color, and fourth color, identify the corresponding inkjet-printed areas on the printing medium: first color area, second color area, third color area, and fourth color area; Control the printhead to spray ink of the first color onto the first color area; Control the printhead to spray ink of the second color onto the second color area; Control the printhead to spray the third color ink onto the third color area; The printhead is controlled to spray ink of the fourth color onto the fourth color area.

3. The nozzle detection method based on ink color adjustment illumination light according to claim 2, characterized in that, The process of controlling different nozzles to eject ink of corresponding colors and generating a detection map of the corresponding color in the corresponding color area of ​​the printing medium includes: During a one-time scan print, when the printhead moves to the first color area, the printhead is controlled to spray ink of the first color. When the printhead moves to the second color area, control the printhead to spray the ink of the second color; When the printhead moves to the third color area, the printhead is controlled to spray the ink of the third color; When the printhead moves to the fourth color area, the printhead is controlled to spray the ink of the fourth color.

4. The nozzle detection method based on ink color adjustment illumination light according to claim 2, characterized in that, The process of controlling different nozzles to eject ink of corresponding colors and generating a detection map of the corresponding color in the corresponding color area of ​​the printing medium includes: Control the printhead to spray ink of the first color onto the first color area; Control the printhead to move to the second color area and spray the second color ink; Control the printhead to move to the third color area and spray the third color ink; Control the printhead to move to the fourth color area and spray the fourth color ink.

5. The nozzle detection method based on ink color adjustment illumination light according to claim 1, characterized in that, When photographing a corresponding color area, a light source sensitive to that color is turned on; when photographing the color area is complete, the light source is turned off, and the photographing device is controlled to move to the next color area for photographing, including: When photographing the first color area, turn on the illumination light source that is sensitive to the first color; When the first color area is captured, the illumination light source is turned off, and the shooting device is moved to the second color area. When shooting the second color area, turn on the illumination light source that is sensitive to the second color; When the second color area is captured, the illumination light source is turned off, and the shooting device is moved to the third color area. When photographing the third color region, turn on the illumination light source that is sensitive to the third color; When the third color area is captured, the illumination light source is turned off, and the shooting device is moved to the fourth color area. When photographing the fourth color region, turn on the illumination light source that is sensitive to the fourth color.

6. A nozzle detection device based on ink color adjustment illumination light, characterized in that, The device includes: An illumination light source acquisition module is used to acquire an illumination light source sensitive to the color of the jetted ink, including: acquiring color block images corresponding to different ink colors; illuminating the color block images with illumination light sources of different wavelengths and capturing the color block images; creating a sensitivity table of the color block image colors and the illumination light sources of different wavelengths based on the capturing results; and acquiring the illumination light source corresponding to different ink colors based on the sensitivity table. The printing module is used to control different nozzles to spray ink of the corresponding color and generate a detection map of the corresponding color in the corresponding color area of ​​the printing medium; wherein there is a gap between each color area; The imaging module is used to illuminate the detection image according to the illumination light source to acquire a test image, including: The irradiation sequence of the illumination light source is set according to the order of the ink colors in the test pattern; The process of controlling the illumination light source to illuminate and capture the detection image according to the illumination sequence to obtain a test image includes: when capturing a corresponding color area, turning on an illumination light source sensitive to that color; when capturing the color area is completed, turning off the illumination light source and controlling the capturing device to move to the next color area for capturing; The detection module is used to detect and determine the state of the nozzle based on the test image.

7. A nozzle detection device based on ink color adjustment illumination light, characterized in that, include: At least one processor, at least one memory, and computer program instructions stored in the memory, which, when executed by the processor, implement the method as described in any one of claims 1-5.

8. A storage medium storing computer program instructions thereon, characterized in that, When the computer program instructions are executed by a processor, the method as described in any one of claims 1-5 is implemented.

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