An LED color conversion method and device for a display panel

Abstract

The present application provides an LED color conversion method and device for a display panel. The method includes: first, obtaining the specification parameters of at least two groups of LEDs arranged on the display panel, and generating a moving path of the display panel according to the specification parameters of the at least two groups of LEDs; then, determining the nozzle position of the piezoelectric jet valve, and performing color conversion processing on the at least two groups of LEDs according to the nozzle position of the piezoelectric jet valve and the moving path of the display panel. By applying the printing process of the piezoelectric jet valve and controlling the movement of the display panel to perform color conversion processing on the LEDs on the display panel, not only can the interference phenomenon of adjacent LED color conversion during the color conversion process be effectively avoided, but also the overall color conversion accuracy of the display panel can be guaranteed; at the same time, by utilizing the convenient nozzle replacement characteristic of the piezoelectric jet valve, the labor input cost is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of display panel processing, and in particular, relates to a method and device for changing the color of an LED of a display panel. Background Art

[0002] With the rapid development of electronic products, people's demand for display panels and parameter requirements are getting higher and higher. Currently, one of the most promising display panels is Mini-LED (mini-light-emitting diode), which has many advantages over traditional LCD (Liquid Crystal Display) panels, such as low power consumption, fast response, good controllability, high efficiency and environmental protection.

[0003] At present, the main materials for producing Mini-LEDs can include, but are not limited to, blue-light-emitting gallium nitride, green-light-emitting gallium nitride, and red-light-emitting gallium nitride. Among them, the production technology of blue-light-emitting gallium nitride and green-light-emitting gallium nitride is becoming mature, while the production technology of red-light-emitting gallium nitride is prone to low yield, high cost, and impure red light chromaticity. Based on this, a common technology is to apply phosphor to the surface of the LED by screen printing, and the color of the phosphor can determine the color of the LED. For example, but not limited to, red phosphor can be evenly applied to the surface of the blue-light-emitting gallium nitride, so that the blue light emitted by the blue-light-emitting gallium nitride can be converted into red after penetrating the red phosphor.

[0004] However, the above-mentioned technical precision is too low, which may easily interfere with the light-emitting quality of adjacent LEDs during the coating process, thereby affecting the light-emitting effect of the entire panel; and due to the high viscosity of the phosphor, this method is also likely to increase the manual cleaning cost, further causing discomfort to users. Summary of the invention

[0005] In order to solve the above-mentioned problems of low printing process precision, affecting the panel's luminous effect and difficulty in cleaning, the present application provides a method and device for changing the color of LEDs on a display panel. By applying the printing process of a piezoelectric injection valve and controlling the movement of the display panel, the LEDs on the display panel can be changed in color. This can not only effectively avoid the interference of the color change of adjacent LEDs during the color change process, but also ensure the overall color change accuracy of the display panel. At the same time, the convenient nozzle replacement feature of the piezoelectric injection valve is utilized to reduce the labor input cost. The technical solution is as follows:

[0006] In a first aspect, the present application provides a method for changing color of an LED of a display panel, comprising:

[0007] Obtaining specification parameters of at least two groups of LEDs disposed on the display panel; wherein each group of LEDs includes at least two types of LEDs;

[0008] generating a moving path of the display panel according to specification parameters of at least two groups of LEDs;

[0009] The nozzle position of the piezoelectric injection valve is determined, and color change processing is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel.

[0010] In an optional solution of the first aspect, obtaining specification parameters of at least two groups of LEDs arranged on the display panel includes:

[0011] Get the size of each type of LED in each group of LEDs, as well as the distance between any two adjacent types of LEDs;

[0012] Get the distance between any two adjacent groups of LEDs;

[0013] Generating a moving path of a display panel according to specification parameters of at least two groups of LEDs includes:

[0014] The moving path of the display panel is generated according to the size of each type of LED, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs.

[0015] In another optional solution of the first aspect, before obtaining the specification parameters of at least two groups of LEDs arranged on the display panel, the method further includes:

[0016] Attach the display panel to the suction cup and control the suction cup to move to the preset zero position;

[0017] The suction cup is leveled at the preset zero position.

[0018] In another optional solution of the first aspect, determining the nozzle position of the piezoelectric injection valve includes:

[0019] Determining the number of nozzles of the piezoelectric injection valve according to the total number of at least two types of LEDs in each group of LEDs;

[0020] adjusting the distance between each nozzle of the piezoelectric injection valve according to the distance between any two adjacent types of LEDs;

[0021] The distance between the nozzle of the piezoelectric injection valve and the display panel is controlled to be a preset distance.

[0022] In another alternative of the first aspect, each group of LEDs includes a first type of LED and a second type of LED;

[0023] After determining the nozzle position of the piezoelectric injection valve and before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0024] Performing a first loading process on a material tube of a piezoelectric injection valve corresponding to a first type of LED;

[0025] The material tube of the piezoelectric injection valve corresponding to the second type LED is subjected to a second filling process.

[0026] In another optional solution of the first aspect, a first loading process is performed on a material tube of a piezoelectric injection valve corresponding to a first type of LED, comprising:

[0027] Mixing a phosphor of a preset first concentration with a silica gel of a preset second concentration to obtain a mixture having a viscosity within a preset viscosity range and a solid content within a preset solid content range;

[0028] Filling the mixture into a feed pipe of a piezoelectric injection valve corresponding to a first type of LED;

[0029] Among them, the preset viscosity range is between 10000cp and 100000cp, and the preset solid content range is between 40% and 60%.

[0030] In another optional solution of the first aspect, after determining the nozzle position of the piezoelectric injection valve and before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0031] The piezoelectric injection valve is preheated so that the nozzle temperature of the piezoelectric injection valve is within a preset temperature range.

[0032] In another optional solution of the first aspect, after determining the nozzle position of the piezoelectric injection valve and before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0033] The piezoelectric jet valve is subjected to a pre-printing process so that the material ejected by the piezoelectric jet valve is in a stable state.

[0034] In another optional solution of the first aspect, before determining the nozzle position of the piezoelectric injection valve and performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, it also includes:

[0035] Determine the size of the LED retaining wall according to the size of each type of LED and the distance between any two adjacent types of LEDs;

[0036] Printing LED retaining walls corresponding to each group of LEDs on the display panel according to the size of the LED retaining walls; wherein the LED retaining walls are used to fix the shape of each group of LEDs after the color change treatment;

[0037] The method includes: performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, including:

[0038] Color changing processing is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve, the moving path of the display panel, and the LED retaining wall corresponding to each group of LEDs.

[0039] In another optional solution of the first aspect, color changing processing is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, including:

[0040] Determining an initial position of the display panel according to the nozzle position of the piezoelectric injection valve, and controlling the display panel to move to the initial position of the display panel;

[0041] determining the working state of the nozzle of the piezoelectric injection valve according to the moving path of the display panel;

[0042] The display panel is controlled to move according to the moving path of the display panel, and the nozzle of the piezoelectric injection valve is controlled to perform spraying according to the working state.

[0043] In another optional solution of the first aspect, after the at least two groups of LEDs are subjected to color change processing according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0044] The at least two groups of LEDs that have undergone the color change treatment are cured.

[0045] In a second aspect, the present application provides an LED color changing device for a display panel, comprising:

[0046] A parameter acquisition module, used to acquire specification parameters of at least two groups of LEDs arranged on the display panel; wherein each group of LEDs includes at least two types of LEDs;

[0047] A path generation module, used to generate a moving path of the display panel according to specification parameters of at least two groups of LEDs;

[0048] The motion control module is used to determine the nozzle position of the piezoelectric injection valve and perform color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel.

[0049] In an optional solution of the second aspect, the parameter acquisition module includes:

[0050] A first acquisition unit is used to acquire the size of each type of LED in each group of LEDs, and the distance between any two adjacent types of LEDs;

[0051] A second acquisition unit is used to acquire the distance between any two adjacent groups of LEDs;

[0052] The path generation module is specifically used for:

[0053] The moving path of the display panel is generated according to the size of each type of LED, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs.

[0054] In yet another optional solution of the second aspect, the device further comprises:

[0055] An adsorption zeroing module is used to adsorb the display panel on the suction cup before obtaining the specification parameters of at least two groups of LEDs arranged on the display panel, and control the suction cup to move to a preset zeroing position;

[0056] The correction module is used to perform horizontal correction processing on the suction cup at a preset zero position.

[0057] In yet another optional solution of the second aspect, the motion control module includes:

[0058] a determination unit, configured to determine the number of nozzles of the piezoelectric injection valve according to the total number of at least two types of LEDs in each group of LEDs;

[0059] An adjusting unit, used for adjusting the distance between each nozzle of the piezoelectric injection valve according to the distance between any two adjacent types of LEDs;

[0060] The control unit is used to control the distance between the nozzle of the piezoelectric injection valve and the display panel to be a preset distance.

[0061] In another alternative of the second aspect, each group of LEDs includes a first type of LED and a second type of LED;

[0062] The motion control module also includes:

[0063] a first processing unit, configured to perform a first loading process on a material tube of the piezoelectric injection valve corresponding to the first type of LED after determining the nozzle position of the piezoelectric injection valve and before performing a color change process on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and a moving path of the display panel;

[0064] The second processing unit is used to perform a second loading process on the material tube of the piezoelectric injection valve corresponding to the second type of LED.

[0065] In yet another optional solution of the second aspect, the first processing unit is specifically configured to:

[0066] Mixing a phosphor of a preset first concentration with a silica gel of a preset second concentration to obtain a mixture having a viscosity within a preset viscosity range and a solid content within a preset solid content range;

[0067] Filling the mixture into a feed pipe of a piezoelectric injection valve corresponding to a first type of LED;

[0068] Among them, the preset viscosity range is between 10000cp and 100000cp, and the preset solid content range is between 40% and 60%.

[0069] In yet another optional solution of the second aspect, the motion control module further includes:

[0070] The heating unit is used to preheat the piezoelectric injection valve after determining the nozzle position of the piezoelectric injection valve and before changing the color of at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, so that the nozzle temperature of the piezoelectric injection valve is within a preset temperature range.

[0071] In yet another optional solution of the second aspect, the motion control module further includes:

[0072] The pre-printing unit is used to perform pre-printing processing on the piezoelectric jet valve after determining the nozzle position of the piezoelectric jet valve and before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric jet valve and the moving path of the display panel, so as to make the material ejected by the piezoelectric jet valve in a stable state.

[0073] In yet another optional solution of the second aspect, the device further comprises:

[0074] A data processing module, used for determining the size of the LED retaining wall according to the size of each type of LED and the distance between any two adjacent types of LEDs before determining the nozzle position of the piezoelectric injection valve and performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel;

[0075] The retaining wall printing module is used to print the LED retaining wall corresponding to each group of LEDs on the display panel according to the size of the LED retaining wall; wherein the LED retaining wall is used to fix the shape of each group of LEDs after the color change treatment;

[0076] The motion control module is specifically used for:

[0077] Color changing processing is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve, the moving path of the display panel, and the LED retaining wall corresponding to each group of LEDs.

[0078] In yet another optional solution of the second aspect, the motion control module includes:

[0079] A motion unit, used to determine an initial position of the display panel according to a nozzle position of the piezoelectric injection valve, and control the display panel to move to the initial position of the display panel;

[0080] A processing unit, used to determine the working state of the nozzle of the piezoelectric injection valve according to the moving path of the display panel;

[0081] The control unit is used to control the display panel to move according to the moving path of the display panel, and control the nozzle of the piezoelectric injection valve to perform spraying according to the working state.

[0082] In yet another optional solution of the second aspect, the device further comprises:

[0083] The curing module is used for curing the at least two groups of LEDs after the color-changing treatment is performed on the at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel.

[0084] In a third aspect, the present application also provides an LED color changing device for a display panel, including a processor and a memory;

[0085] The processor is connected to the memory;

[0086] A memory for storing executable program codes;

[0087] The processor runs the program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the LED color changing method of the display panel provided by the first aspect of the embodiment of the present application or any one of the implementation methods of the first aspect.

[0088] In a fourth aspect, the present application provides a computer storage medium, which stores a computer program. The computer program includes program instructions. When the program instructions are executed by a processor, the LED color changing method of the display panel provided by the first aspect of the embodiment of the present application or any one of the implementation methods of the first aspect can be implemented.

[0089] Beneficial effects:

[0090] When the color of the LED of the display panel is changed, the specification parameters of at least two groups of LEDs set on the display panel can be obtained first, and the moving path of the display panel can be generated according to the specification parameters of the at least two groups of LEDs; then the nozzle position of the piezoelectric injection valve can be determined, and the color change treatment of at least two groups of LEDs can be performed according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel. By applying the printing process of the piezoelectric injection valve and controlling the movement of the display panel to make the LED on the display panel change color, not only can the color change interference between adjacent LEDs during the color change process be effectively avoided, but also the piezoelectric injection valve can be combined with the characteristics of using a high-speed impact needle to knock the material out of the piezoelectric nozzle, so that the material with suitable viscosity can be sprayed on the irregularly shaped LED surface and still maintain the morphology (will not be sputtered into small dots), thereby ensuring the overall color change accuracy of the display panel; at the same time, the replaceable nozzle characteristics of the piezoelectric injection valve are used to reduce the labor input cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0092] Figure 1 A schematic diagram of a flow chart of a method for changing color of an LED of a display panel provided in an embodiment of the present application;

[0093] Figure 2 A schematic diagram of the arrangement and distribution of LEDs provided in an embodiment of the present application;

[0094] Figure 3 An LED display effect diagram of a display panel provided in an embodiment of the present application;

[0095] Figure 4 A schematic diagram of a color change process of an LED provided in an embodiment of the present application;

[0096] Figure 5 A schematic diagram of the effect of an LED retaining wall provided in an embodiment of the present application;

[0097] Figure 6 A schematic diagram of the structure of an LED color changing device of a display panel provided in an embodiment of the present application;

[0098] Figure 7 A schematic structural diagram of an LED color changing device for another display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0099] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0100] In the following introduction, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The following introduction provides multiple embodiments of the present application, and different embodiments can be replaced or combined, so the present application can also be considered to include all possible combinations of the same and / or different embodiments recorded. Therefore, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the present application should also be considered to include embodiments containing one or more of all other possible combinations of A, B, C, and D, although the embodiment may not be clearly recorded in the following text.

[0101] The following description provides examples and does not limit the scope, applicability or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements described without departing from the scope of the present application. Various processes or components may be appropriately omitted, substituted or added to each example. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted or combined. In addition, features described in some examples may be combined in other examples.

[0102] See also Figure 1 , Figure 1 A schematic flow chart of a method for changing color of an LED of a display panel provided in an embodiment of the present application is shown.

[0103] like Figure 1 As shown, the LED color changing method of the display panel may at least include the following steps:

[0104] Step 102: Obtain specification parameters of at least two groups of LEDs arranged on the display panel.

[0105] The type of the display panel in the embodiment of the present application may be, but is not limited to, a common LED, a Mini-LED, or a Micro-LED, etc. At least two groups of LEDs may be provided on the upper surface of the display panel, and each group of LEDs may include at least two types of LEDs. Possibly, the light emission colors of different types of LEDs may be different, for example, but not limited to, each group of LEDs may include an LED with a green light emission color and an LED with a blue light emission color.

[0106] Possibly, the specification parameters of different types of LEDs are different here. For example, but not limited to, each group of LEDs may include LEDs with a size of a1*a2 and LEDs with a size of b1*b2, but is not limited thereto.

[0107] It is understandable that the number of different types of LEDs included in each group of LEDs may be different. For example, but not limited to, when the light-emitting colors of different types of LEDs are different, the number of LEDs with green light is A, and the number of LEDs with blue light is B. Of course, in the embodiment of the present application, the number of different types of LEDs included in each group of LEDs may also be the same, and is not limited thereto.

[0108] It can also be understood that the distance between any two adjacent LEDs in each group of LEDs can remain consistent, that is, the LEDs in each group of LEDs are arranged at equal intervals, and the arrangement order can be but is not limited to different types of LEDs arranged in sequence or the same type of LEDs arranged in sequence.

[0109] See here Figure 2 FIG. 1 is a schematic diagram showing an arrangement and distribution of LEDs provided in an embodiment of the present application. Figure 2 As shown, each group of LEDs may include LEDs 201 emitting green light and LEDs 202 emitting blue light, wherein the number of LEDs 201 emitting green light is 2 and the number of LEDs 202 emitting blue light is 1. It can be seen that the arrangement order of the group of LEDs is LEDs 201 emitting green light, LEDs 202 emitting blue light and LEDs 201 emitting green light, and the distance between the LEDs 202 emitting blue light and each LED 201 emitting green light is L.

[0110] Of course, the distance between any two adjacent LEDs in each group of LEDs in the embodiment of the present application may also be different, and is not limited to this.

[0111] It can also be understood that the arrangement of at least two groups of LEDs on the display panel can be but is not limited to a symmetrical arrangement, that is, the distance between any two adjacent groups of LEDs in each row of the display panel remains consistent, and / or the distance between any two adjacent groups of LEDs in each column remains consistent.

[0112] Specifically, when the LED on the display panel is subjected to color change processing, the specification parameters of at least two groups of LEDs set on the display panel can be first obtained, so as to determine the nozzle configuration parameters of the piezoelectric injection valve according to the specification parameters of the at least two groups. Among them, the specification parameters of the at least two groups may include, but are not limited to, the distance between any two adjacent groups of LEDs and the distance between any two types of LEDs in each group of LEDs. It can be understood that the embodiment of the present application can spray the color change material on the LED of the display panel through the nozzle of the piezoelectric injection valve, and the number of nozzles of the piezoelectric injection valve may be, but is not limited to, consistent with the number of LEDs included in each group of LEDs, that is, each LED in each group of LEDs can correspond to a nozzle of a piezoelectric injection valve. Secondly, the distance between any two adjacent nozzles of the piezoelectric injection valve can also be determined according to the distance between any two adjacent types of LEDs in each group of LEDs mentioned above, and can be, but is not limited to, the distance between any two adjacent nozzles of the piezoelectric injection valve is consistent with the distance between any two adjacent types of LEDs in each group of LEDs.

[0113] As an option of the embodiment of the present application, obtaining specification parameters of at least two groups of LEDs arranged on the display panel includes:

[0114] Get the size of each type of LED in each group of LEDs, as well as the distance between any two adjacent types of LEDs;

[0115] Get the distance between any two adjacent groups of LEDs;

[0116] Generating a moving path of a display panel according to specification parameters of at least two groups of LEDs includes:

[0117] The moving path of the display panel is generated according to the size of each type of LED, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs.

[0118] Specifically, in the embodiment of the present application, the upper surface of the display panel can be photographed by a top vertical camera disposed above the display panel, and the size of each type of LED in each group of LEDs, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs can be calculated from the photographed image based on a visual algorithm. Among them, the total number of different types of LEDs included in each group of LEDs can also be determined from the photographed image, and the number of nozzles of the piezoelectric injection valve can be set to the same number according to the total number of LEDs. It can be understood that after calculating the distance between any two adjacent types of LEDs in each group of LEDs, the distance between any two adjacent nozzles of the piezoelectric injection valve can also be adjusted according to the distance between the any two adjacent types of LEDs, so that the distance between the any two adjacent types of LEDs is consistent with the distance between any two adjacent nozzles of the piezoelectric injection valve.

[0119] It can also be understood that after calculating the size of each type of LED in each group of LEDs, the distance between any two adjacent types of LEDs, and obtaining the distance between any two adjacent groups of LEDs, the moving path of the display panel can be generated according to the size of each type of LED in each group of LEDs, the distance between any two adjacent types of LEDs, and obtaining the distance between any two adjacent groups of LEDs. It should be noted that in the embodiment of the present application, by keeping the nozzle position of the piezoelectric injection valve unchanged, the display panel arranged under the nozzle of the piezoelectric injection valve is moved so that the nozzle of the piezoelectric injection valve sprays the color-changing material on the LED surface of the display panel. This method can not only improve the color-changing accuracy of the LED, but also, compared with the method of keeping the position of the display panel unchanged and moving the nozzle of the piezoelectric injection valve so that the nozzle of the piezoelectric injection valve sprays the color-changing material on the LED surface of the display panel, it can effectively avoid the deformation of the sprayed material caused by the movement of the nozzle of the piezoelectric injection valve, thereby affecting the luminous effect of the display panel.

[0120] Step 104 : Generate a moving path of the display panel according to specification parameters of at least two groups of LEDs.

[0121] Specifically, after obtaining the size of each type of LED in each group of LEDs, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs, the moving path of the display panel in the plane along the X-axis direction and the moving path along the Y-axis direction can be determined according to the size of each type of LED in each group of LEDs, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs. It can be understood that the moving path of the display panel in the plane along the X-axis direction when spraying each group of LEDs can be determined according to the length of each type of LED in each group of LEDs; the moving path of the display panel in the plane along the Y-axis direction when spraying each group of LEDs can be determined according to the width of each type of LED in each group of LEDs. Among them, for the moving path of the display panel determined according to the length and width of each type of LED in each group of LEDs, the display surface can be controlled to move at a uniform speed according to the moving path to ensure the nozzle spraying quality of the piezoelectric injection valve.

[0122] It can also be understood that the moving path of the display panel along the X-axis direction in the plane when it is not necessary to spray each group of LEDs can be determined according to the distance between any two adjacent groups of LEDs in each row on the display panel; the moving path of the display panel along the Y-axis direction in the plane when it is not necessary to spray each group of LEDs can be determined according to the distance between any two adjacent groups of LEDs in each column on the display panel. Among them, for the moving path of the display panel determined according to the distance between any two adjacent groups of LEDs, it can be, but is not limited to, controlling the display panel to accelerate or decelerate according to the moving path.

[0123] Of course, the distance between any two adjacent groups of LEDs in each row and the distance between any two adjacent groups of LEDs in each column mentioned above can also be determined by, but not limited to, the number of LED groups in each row (or the total number of LEDs in each row) and the number of LED groups in each column (or the total number of LEDs in each column) on the display panel, respectively, and the present application is not limited to this.

[0124] Step 106 : Determine the nozzle position of the piezoelectric injection valve, and perform color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel.

[0125] Specifically, after generating the moving path of the display panel, the nozzle position of the piezoelectric injection valve can be determined first, and the nozzle of the piezoelectric injection valve can be used to spray the color-changing material at the nozzle position, that is, when the nozzle of the piezoelectric injection valve is in a working state, the display panel needs to be controlled to move under the nozzle of the piezoelectric injection valve, and the color-changing material sprayed by the nozzle of the piezoelectric injection valve is sprayed on the surface of each LED in each group of LEDs of the display panel. It can be understood that when the nozzle of the piezoelectric injection valve is in a non-working state, the display panel still needs to be controlled to move under the nozzle of the piezoelectric injection valve, so that when the nozzle of the piezoelectric injection valve is in a working state again, the color-changing material sprayed by the nozzle of the piezoelectric injection valve can be sprayed on the surface of each LED in each group of LEDs of the display panel.

[0126] Furthermore, after the nozzle position of the piezoelectric injection valve is determined, the color of at least two groups of LEDs on the display panel may be changed according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel.

[0127] As another option of the embodiment of the present application, color change processing is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, including:

[0128] Determining an initial position of the display panel according to the nozzle position of the piezoelectric injection valve, and controlling the display panel to move to the initial position of the display panel;

[0129] determining the working state of the nozzle of the piezoelectric injection valve according to the moving path of the display panel;

[0130] The display panel is controlled to move according to the moving path of the display panel, and the nozzle of the piezoelectric injection valve is controlled to perform spraying according to the working state.

[0131] Specifically, after obtaining the nozzle position of the piezoelectric injection valve, the initial position of the display panel can be determined according to the nozzle position of the piezoelectric injection valve. The initial position of the display panel can be, but is not limited to, a preset distance along the Y-axis direction in the same plane as the nozzle position of the piezoelectric injection valve, or a preset distance along the X-axis direction in the same plane as the nozzle position of the piezoelectric injection valve, so that the display panel can be quickly moved to the bottom of the nozzle of the piezoelectric injection valve. Further, after determining the initial position of the display panel, the display panel can be, but is not limited to, controlled to move to the initial position of the display panel by a motion platform. The motion platform can be, but is not limited to, a base, a motor drive structure, a lifting structure, and a processor, etc., and the embodiments of the present application are not limited thereto.

[0132] It should be noted that when determining the nozzle position of the piezoelectric injection valve, it is possible but not limited to first controlling the nozzle of the piezoelectric injection valve to print a calibration point in a preset area, and identifying the calibration point printed by the nozzle of the piezoelectric injection valve based on the camera, for example but not limited to controlling the camera to move to directly above the calibration point, and determining the nozzle position of the piezoelectric injection valve corresponding to the calibration point through a visual algorithm.

[0133] Of course, after obtaining the nozzle position of the piezoelectric injection valve, the embodiment of the present application can also first determine the position of the first group of LEDs on the display panel, and then determine the initial position of the display panel in combination with the nozzle position of the piezoelectric injection valve and the position of the first group of LEDs. Among them, the position of the first group of LEDs on the display panel can be, but is not limited to, first placing the display panel on the substrate, and identifying the marking points on the display panel based on the camera to determine whether the line formed by any two adjacent marking points is parallel to the calibration line set on the substrate, and when it is determined that the line formed by any two adjacent marking points is parallel to the calibration line set on the substrate, the position of the first group of LEDs on the display panel can be determined according to the position of the marking points on the display panel.

[0134] Furthermore, the initial position of the display panel can be finally determined by controlling the nozzle position of the piezoelectric injection valve to be aligned with the position of the first group of LEDs on the display panel, but this is not limited to this.

[0135] Furthermore, after determining the moving path of the display panel, the working state of the nozzle of the piezoelectric injection valve can be determined according to the moving path of the display panel. The moving path of the display panel may include, but is not limited to, determining the moving path of the display panel in the plane along the X-axis direction when spraying each group of LEDs according to the length of each type of LED in each group of LEDs, determining the moving path of the display panel in the plane along the Y-axis direction when spraying each group of LEDs according to the width of each type of LED in each group of LEDs, determining the moving path of the display panel in the plane along the X-axis direction when spraying each group of LEDs according to the distance between any two adjacent groups of LEDs in each row of the display panel, and determining the moving path of the display panel in the plane along the Y-axis direction when spraying each group of LEDs according to the distance between any two adjacent groups of LEDs in each column of the display panel. It can be understood that when the display panel moves along a moving path determined by the length and width of each type of LED in each group of LEDs, the nozzle of the piezoelectric injection valve is in a working state; when the display panel moves along a moving path determined by the distance between any two adjacent groups of LEDs, the nozzle of the piezoelectric injection valve is in a non-working state.

[0136] It should be noted that the embodiment of the present application can adjust the working state of the nozzle of the piezoelectric injection valve by preset time, for example but not limited to when the time is at t1, the nozzle of the piezoelectric injection valve is controlled to be in a working state; when the time is at t2, the nozzle of the piezoelectric injection valve is controlled to be in a non-working state; when the time is at t3, the nozzle of the piezoelectric injection valve is controlled to be in a working state; when the time is at t4, the nozzle of the piezoelectric injection valve is controlled to be in a non-working state.

[0137] Furthermore, the display panel can be controlled to move according to the moving path of the display panel, and when the display panel moves according to the moving path determined according to the length and width of each type of LED in each group of LEDs, the nozzle of the piezoelectric injection valve can be controlled to be in a working state; and when the display panel moves according to the moving path determined according to the distance between any two adjacent groups of LEDs, the nozzle of the piezoelectric injection valve can be controlled to be in a non-working state.

[0138] See here Figure 3 FIG. 1 shows an LED display effect diagram of a display panel provided by an embodiment of the present application. Figure 3 As shown, the display panel may include, but is not limited to, six groups of LEDs, each group of LEDs includes two LEDs 301 emitting blue light and one LED 302 emitting green light, and the LEDs are arranged in the order of blue light-green light-blue light. The display panel may distribute the six groups of LEDs into three rows and two columns, the distance between two adjacent groups of LEDs in each row is x1, the distance between two adjacent groups of LEDs in each column is y2, and the size of the LED 302 emitting green light and the LED 301 emitting blue light in each group of LEDs is consistent, and the length is y1. It can be understood that the number of nozzles 303 corresponding to the piezoelectric injection valve of the display panel can also be set to three, wherein the first nozzle can be used to spray red fluorescent powder mixed with silicone material to the first LED301 in each group of LEDs with a blue light color, the second nozzle can be used to spray scattering particles (also understood as titanium dioxide) to the LED302 in each group of LEDs with a green light color, and the third nozzle can be used to spray scattering particles (also understood as titanium dioxide) to the second LED301 in each group of LEDs with a blue light color, and the rate at which each nozzle sprays the color-changing material can be kept consistent.

[0139] After determining the nozzle position of the piezoelectric injection valve, the display panel can be controlled to move to the initial position first. The initial position can be a preset distance along the Y-axis direction in the same plane as the nozzle position of the piezoelectric injection valve, and then the display panel can be controlled to move a preset distance along the Y-axis in the positive direction until the upper edge of the first group of LEDs on the display panel is directly below the nozzle of the piezoelectric injection valve. At this time, the nozzle of the piezoelectric injection valve can be controlled to be in a working state. Then the display panel can be controlled to move at a uniform speed y1 along the positive direction of the Y-axis until the lower edge of the first group of LEDs on the display panel is directly below the nozzle of the piezoelectric injection valve. At this time, the nozzle of the piezoelectric injection valve can be controlled to be in a non-working state. Then the display panel can be controlled to move y2 along the Y-axis in the positive direction until the upper edge of the second group of LEDs on the display panel is directly below the nozzle of the piezoelectric injection valve. At this time, the nozzle of the piezoelectric injection valve can be controlled to be in a working state. Then the display panel can be controlled to move uniformly along the positive Y-axis of the plane at a speed of y1 until the lower edge of the second group of LEDs of the display panel is directly below the nozzle of the piezoelectric injection valve, at which time the nozzle of the piezoelectric injection valve can be controlled to be in a non-working state. Then the display panel can be controlled to move uniformly along the positive Y-axis of the plane at a speed of y2 until the upper edge of the third group of LEDs of the display panel is directly below the nozzle of the piezoelectric injection valve, at which time the nozzle of the piezoelectric injection valve can be controlled to be in a working state. Then the display panel can be controlled to move uniformly along the positive Y-axis of the plane at a speed of y1 until the lower edge of the third group of LEDs of the display panel is directly below the nozzle of the piezoelectric injection valve, at which time the nozzle of the piezoelectric injection valve can be controlled to be in a non-working state. Then the display panel can be controlled to move negatively along the X-axis of the plane at a speed of x1 until the lower edge of the fourth group of LEDs of the display panel is directly below the nozzle of the piezoelectric injection valve, at which time the nozzle of the piezoelectric injection valve can be controlled to be in a working state. Then the display panel can be controlled to move at a uniform speed y1 in the negative direction along the plane Y axis until the upper edge of the fourth group of LEDs on the display panel is directly below the nozzle of the piezoelectric injection valve, at which time the nozzle of the piezoelectric injection valve can be controlled to be in a non-working state. Then the display panel can be controlled to move at a uniform speed y2 in the negative direction along the plane Y axis until the lower edge of the fifth group of LEDs on the display panel is directly below the nozzle of the piezoelectric injection valve, at which time the nozzle of the piezoelectric injection valve can be controlled to be in a working state. Then the display panel can be controlled to move at a uniform speed y1 in the negative direction along the plane Y axis until the upper edge of the fifth group of LEDs on the display panel is directly below the nozzle of the piezoelectric injection valve, at which time the nozzle of the piezoelectric injection valve can be controlled to be in a non-working state. Then the display panel can be controlled to move at a uniform speed y2 in the negative direction along the plane Y axis until the lower edge of the sixth group of LEDs on the display panel is directly below the nozzle of the piezoelectric injection valve, at which time the nozzle of the piezoelectric injection valve can be controlled to be in a working state.Then the display panel can be controlled to move uniformly along the negative Y axis of the plane at a speed y1 until the upper edge of the sixth group of LEDs of the display panel is directly below the nozzle of the piezoelectric injection valve. At this time, the nozzle of the piezoelectric injection valve can be controlled to be in a non-working state.

[0140] As another option of the embodiment of the present application, before obtaining the specification parameters of at least two groups of LEDs arranged on the display panel, the method further includes:

[0141] Attach the display panel to the suction cup and control the suction cup to move to the preset zero position;

[0142] The suction cup is leveled at the preset zero position.

[0143] Specifically, before obtaining at least two groups of LEDs arranged on the display panel, the display panel can also be adsorbed on the suction cup to fix and support the display panel through the suction force of the suction cup, and the movement of the display panel can be controlled by controlling the suction cup. Among them, for a PCB display panel with poor overall flatness, the originally arched panel surface can be flattened by the adsorption of the suction cup, thereby ensuring that the distance from the piezoelectric nozzle to the display panel is basically consistent. It can be understood that in the embodiment of the present application, it is possible but not limited to controlling the open vacuum suction cup to adsorb the back of the display panel by a vacuum pump to control the movement of the display panel, and it is not limited to this.

[0144] Furthermore, the suction cup may be controlled to move to a preset zero position, and a horizontal correction process may be performed on the suction cup at the preset zero position, so that the display panel remains parallel to the horizontal plane.

[0145] As another option of the embodiment of the present application, determining the nozzle position of the piezoelectric injection valve includes:

[0146] Determining the number of nozzles of the piezoelectric injection valve according to the total number of at least two types of LEDs in each group of LEDs;

[0147] adjusting the distance between each nozzle of the piezoelectric injection valve according to the distance between any two adjacent types of LEDs;

[0148] The distance between the nozzle of the piezoelectric injection valve and the display panel is controlled to be a preset distance.

[0149] Specifically, in the embodiment of the present application, the upper surface of the display panel can be photographed by a top vertical camera disposed above the display panel, and the size of each type of LED in each group of LEDs, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs can be calculated from the photographed image based on a visual algorithm. Among them, the total number of different types of LEDs included in each group of LEDs can be determined from the photographed image, and the number of nozzles of the piezoelectric injection valve with the same number can be set according to the total number of LEDs, and the distance between each nozzle of the piezoelectric injection valve can also be adjusted according to the distance between any two adjacent types of LEDs.

[0150] Furthermore, after adjusting the distance between two adjacent nozzles, the distance between all the nozzles of the piezoelectric injection valve and the display panel can also be controlled to be a preset distance. The control method can be but is not limited to controlling all the nozzles of the piezoelectric injection valve to move in the positive or negative direction along the plane Y-axis until the distance is the preset distance, so as to ensure that the color-changing material ejected by all the nozzles of the piezoelectric injection valve can maintain a relatively fixed shape on each LED.

[0151] As another option of the embodiment of the present application, each group of LEDs includes a first type of LED and a second type of LED;

[0152] After determining the nozzle position of the piezoelectric injection valve and before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0153] Performing a first loading process on a material tube of a piezoelectric injection valve corresponding to a first type of LED;

[0154] The material tube of the piezoelectric injection valve corresponding to the second type LED is subjected to a second filling process.

[0155] In the embodiment of the present application, when each group of LEDs includes a first type of LED and a second type of LED, the first type of LED may be, but is not limited to, an LED emitting blue light, and the second type of LED may be, but is not limited to, an LED emitting green light. It is understood that the number of the first type of LEDs may be, but is not limited to, at least one, and the number of the second type of LEDs may be, but is not limited to, at least one. For example, a group of LEDs may include two LEDs emitting blue light and one LED emitting green light, and the arrangement order of the group of LEDs is blue-green-blue.

[0156] Specifically, after the nozzle position of the piezoelectric injection valve is determined, and before the color change process is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the material tube of the piezoelectric injection valve corresponding to the first type of LED may be subjected to a first charging process, and the material tube of the piezoelectric injection valve corresponding to the second type of LED may be subjected to a second charging process. In other words, the first material is charged into the material tube of the piezoelectric injection valve corresponding to the first type of LED, and the second material is charged into the material tube of the piezoelectric injection valve corresponding to the second type of LED. Here, taking the above-mentioned LED group that may include two LEDs with blue light emission colors and one LED with green light emission colors, and the arrangement order of the LED group is blue-green-blue as an example, the material tube corresponding to the first LED with blue light emission colors in the LED group may be loaded with red phosphor and silica gel mixed according to a preset mass ratio, the material tube corresponding to the LED with green light emission colors in the LED group may be loaded with scattering particles of a preset concentration, and the material tube corresponding to the second LED with blue light emission colors in the LED group may be loaded with scattering particles of a preset concentration. Among them, the red phosphor and silica gel mixed in a preset mass ratio may correspond to the scattering particles of a preset concentration, so that the LED of the display panel has the best luminous effect after color change.

[0157] It should be noted that the red phosphor and silica gel mentioned above can be mixed according to a preset first concentration of phosphor and a preset second concentration of silica gel to obtain a mixture with a viscosity in a preset viscosity range and a solid content in a preset solid content range. The preset viscosity range is between 10000cp and 100000cp, and can preferably be set to 50000cp; the preset solid content range is between 40% and 60%, and can preferably be set to 50% (to ensure the conversion rate of blue light to red light). In the embodiment of the present application, by formulating a material with suitable viscosity and solid content, it can be ensured that the material can maintain a relatively uniform shape when sprayed on the surface of an LED of any shape through a piezoelectric injection valve, and sputtering can be avoided, thereby effectively preventing the color change effect on adjacent LEDs.

[0158] It is understandable that the mass ratio of red phosphor and silica gel can be adjusted accordingly according to different red chromaticity requirements, so that the chromaticity of the first LED in each group of LEDs with a blue light color remains consistent after it changes color to red. Scattering particles can be used to improve the luminous viewing angle of the LED with a green light color and the second LED with a blue light color in each group of LEDs. Of course, when modulating the red phosphor, silica gel mixture and scattering particles, it is also possible but not limited to sequentially performing stirring, tube filling and centrifugation steps to make their viscosity have a certain fluidity, so that the red phosphor, silica gel mixture and scattering particles can automatically level to a shape close to the desired shape of the LED after being sprayed onto the upper surface of the LED, and can avoid interfering with the chromaticity of other adjacent LEDs.

[0159] See here Figure 4 FIG. 1 is a schematic diagram of a color change process of an LED provided in an embodiment of the present application. Figure 4 As shown, the LED includes two LEDs 401 emitting blue light and one LED 402 emitting green light, and they are arranged in the order of blue light-green light-blue light. The piezoelectric injection valve can be provided with three nozzles, wherein the first nozzle is used to spray the red phosphor mixed with silica gel material 403 on the first LED 401 emitting blue light, the second nozzle can be used to spray the scattering particles (also understood as titanium dioxide) 404 on the LED 402 emitting green light, and the third nozzle can be used to spray the scattering particles (also understood as titanium dioxide) 404 on the second LED 401 emitting blue light, and the rate of each nozzle spraying the color-changing material can be kept consistent.

[0160] As another optional embodiment of the present application, after determining the nozzle position of the piezoelectric injection valve, before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, it also includes:

[0161] The piezoelectric injection valve is preheated so that the nozzle printing temperature of the piezoelectric injection valve is within a preset temperature range.

[0162] Specifically, after determining the nozzle position of the piezoelectric injection valve, before performing color change treatment on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the piezoelectric injection valve may be heated so that the nozzle temperature of the piezoelectric injection valve is within a preset temperature range. This method can effectively ensure that the injection amount of the color changing material remains stable.

[0163] As another optional embodiment of the present application, after determining the nozzle position of the piezoelectric injection valve, before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, it also includes:

[0164] The piezoelectric jet valve is subjected to a pre-printing process so that the material ejected by the piezoelectric jet valve is in a stable state.

[0165] Specifically, after determining the nozzle position of the piezoelectric injection valve, the piezoelectric injection valve may be pre-printed before performing color change treatment on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel. Since the material that has been in the piezoelectric nozzle for a long time may have uneven dot sizes when it is first ejected, the physical and chemical properties of the color-changing material ejected from the nozzle of the piezoelectric injection valve may gradually become stable through pre-printing (this physical and chemical property is related to the material properties), and the color change treatment may be performed on the LED of the display panel when the color-changing material ejected from the piezoelectric injection valve is in a stable state.

[0166] As another optional embodiment of the present application, before determining the nozzle position of the piezoelectric injection valve and performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, it also includes:

[0167] Determine the size of the LED retaining wall according to the size of each type of LED and the distance between any two adjacent types of LEDs;

[0168] Printing LED retaining walls corresponding to each group of LEDs on the display panel according to the size of the LED retaining walls; wherein the LED retaining walls are used to fix the shape of each group of LEDs after the color change treatment;

[0169] The method includes: performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, including:

[0170] Color changing processing is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve, the moving path of the display panel, and the LED retaining wall corresponding to each group of LEDs.

[0171] Specifically, in order to better fix the shape of the color-changing material sprayed on each LED, the size of the LED retaining wall can be determined according to the size of each type of LED and the distance between any two adjacent types of LEDs before the nozzle position of the piezoelectric injection valve is determined and the color-changing process is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel. Among them, the LED retaining wall can be but not limited to a round-shaped structure, and the size of the channel formed by it can be consistent with the size of the corresponding LED. It can be understood that each group of LEDs can correspond to one or more LED retaining walls. Possibly, when each group of LEDs corresponds to multiple LED retaining walls, the number of the LED retaining walls can be consistent with the number of LEDs in each group of LEDs, and when the size of each LED is consistent, the size of each LED retaining wall is consistent. Possibly, when each group of LEDs corresponds to one LED retaining wall, the LED retaining wall may include channels consistent with the number of LEDs in each group of LEDs, and when the size of each LED is consistent, the size of each channel in each LED retaining wall is consistent.

[0172] Furthermore, after determining the size of the LED retaining wall, the LED retaining wall corresponding to each group of LEDs can be printed on the display panel according to the size of the LED retaining wall. It can be understood that the method of printing the LED retaining wall here can refer to the above-mentioned method for color-changing the LED, that is, the moving path of the display panel can be first determined according to the size of the LED retaining wall, and then the nozzle position of the piezoelectric injection valve is determined, and the LED retaining wall is printed on the display panel according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, and the above-mentioned multiple embodiments can be applied here, and this application will not be repeated here.

[0173] It can also be understood that the height of the LED retaining wall may be greater than the height of each LED, and the material used to print the LED retaining wall may be insoluble in the color changing material, which is convenient for ensuring the color changing chromaticity of each LED during the color changing process of the LED, and also convenient for cleaning the LED retaining wall after the color changing treatment.

[0174] See here Figure 5 The effect schematic diagram of an LED retaining wall provided by an embodiment of the present application is shown. Figure 5 As shown, the LED includes two LEDs 501 emitting blue light and one LED 502 emitting green light, and they are arranged in the order of blue light-green light-blue light. The LED retaining wall 503 corresponding to the LED may include three channels whose sizes are consistent with the sizes of the LEDs 501 emitting blue light and the LEDs 502 emitting green light, respectively. The nozzle of the piezoelectric injection valve may spray the color-changing material in the corresponding channels respectively, so as to effectively and quickly fix the shape of the color-changing material.

[0175] As another option of the embodiment of the present application, after the color change process is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0176] The at least two groups of LEDs that have undergone the color change treatment are cured.

[0177] See also Figure 6 , Figure 6 A schematic structural diagram of an LED color changing device of a display panel provided in an embodiment of the present application is shown.

[0178] like Figure 6 As shown, the LED color changing device of the display panel may include at least a parameter acquisition module 601, a path generation module 602 and a motion control module 603, wherein:

[0179] The parameter acquisition module 601 is used to acquire specification parameters of at least two groups of LEDs arranged on the display panel; wherein each group of LEDs includes at least two types of LEDs;

[0180] A path generation module 602, used to generate a moving path of the display panel according to specification parameters of at least two groups of LEDs;

[0181] The motion control module 603 is used to determine the nozzle position of the piezoelectric injection valve, and perform color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel.

[0182] In some possible embodiments, the parameter acquisition module includes:

[0183] A first acquisition unit is used to acquire the size of each type of LED in each group of LEDs, and the distance between any two adjacent types of LEDs;

[0184] A second acquisition unit is used to acquire the distance between any two adjacent groups of LEDs;

[0185] The path generation module is specifically used for:

[0186] The moving path of the display panel is generated according to the size of each type of LED, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs.

[0187] In some possible embodiments, the device further includes:

[0188] An adsorption zeroing module is used to adsorb the display panel on the suction cup before obtaining the specification parameters of at least two groups of LEDs arranged on the display panel, and control the suction cup to move to a preset zeroing position;

[0189] The correction module is used to perform horizontal correction processing on the suction cup at a preset zero position.

[0190] In some possible embodiments, the motion control module includes:

[0191] a determination unit, configured to determine the number of nozzles of the piezoelectric injection valve according to the total number of at least two types of LEDs in each group of LEDs;

[0192] An adjusting unit, used for adjusting the distance between each nozzle of the piezoelectric injection valve according to the distance between any two adjacent types of LEDs;

[0193] The control unit is used to control the distance between the nozzle of the piezoelectric injection valve and the display panel to be a preset distance.

[0194] In some possible embodiments, each group of LEDs includes a first type of LED and a second type of LED;

[0195] The motion control module also includes:

[0196] a first processing unit, configured to perform a first loading process on a material tube of the piezoelectric injection valve corresponding to the first type of LED after determining the nozzle position of the piezoelectric injection valve and before performing a color change process on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and a moving path of the display panel;

[0197] The second processing unit is used to perform a second loading process on the material tube of the piezoelectric injection valve corresponding to the second type of LED.

[0198] In some possible embodiments, the first processing unit is specifically configured to:

[0199] Mixing a phosphor of a preset first concentration with a silica gel of a preset second concentration to obtain a mixture having a viscosity within a preset viscosity range and a solid content within a preset solid content range;

[0200] Filling the mixture into a feed pipe of a piezoelectric injection valve corresponding to a first type of LED;

[0201] Among them, the preset viscosity range is between 10000cp and 100000cp, and the preset solid content range is between 40% and 60%.

[0202] In some possible embodiments, the motion control module further includes:

[0203] The heating unit is used to preheat the piezoelectric injection valve after determining the nozzle position of the piezoelectric injection valve and before changing the color of at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, so that the nozzle temperature of the piezoelectric injection valve is within a preset temperature range.

[0204] In some possible embodiments, the motion control module further includes:

[0205] The pre-printing unit is used to perform pre-printing processing on the piezoelectric jet valve after determining the nozzle position of the piezoelectric jet valve and before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric jet valve and the moving path of the display panel, so as to make the material ejected by the piezoelectric jet valve in a stable state.

[0206] In some possible embodiments, the device further includes:

[0207] A data processing module, used for determining the size of the LED retaining wall according to the size of each type of LED and the distance between any two adjacent types of LEDs before determining the nozzle position of the piezoelectric injection valve and performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel;

[0208] The retaining wall printing module is used to print the LED retaining wall corresponding to each group of LEDs on the display panel according to the size of the LED retaining wall; wherein the LED retaining wall is used to fix the shape of each group of LEDs after the color change treatment;

[0209] The motion control module is specifically used for:

[0210] Color changing processing is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve, the moving path of the display panel, and the LED retaining wall corresponding to each group of LEDs.

[0211] In some possible embodiments, the motion control module includes:

[0212] A motion unit, used to determine an initial position of the display panel according to a nozzle position of the piezoelectric injection valve, and control the display panel to move to the initial position of the display panel;

[0213] A processing unit, used to determine the working state of the nozzle of the piezoelectric injection valve according to the moving path of the display panel;

[0214] The control unit is used to control the display panel to move according to the moving path of the display panel, and control the nozzle of the piezoelectric injection valve to perform spraying according to the working state.

[0215] In some possible embodiments, the device further includes:

[0216] The curing module is used for curing the at least two groups of LEDs after the color-changing treatment is performed on the at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel.

[0217] Those skilled in the art can clearly understand that the technical solutions of the embodiments of the present application can be implemented with the help of software and / or hardware. The "unit" and "module" in this specification refer to software and / or hardware that can independently complete or cooperate with other components to complete specific functions, where the hardware can be, for example, a field programmable gate array (FPGA), an integrated circuit (IC), etc.

[0218] Each processing unit and / or module of the embodiments of the present application may be implemented by an analog circuit that implements the functions described in the embodiments of the present application, or may be implemented by software that executes the functions described in the embodiments of the present application.

[0219] See also Figure 7 , Figure 7 A schematic structural diagram of an LED color changing device for another display panel provided in an embodiment of the present application is shown.

[0220] like Figure 7 As shown, the LED color changing device 700 of the display panel may include: at least one processor 701 , at least one network interface 704 , a user interface 703 , a memory 705 and at least one communication bus 702 .

[0221] The communication bus 702 may be used to realize the connection and communication among the above-mentioned components.

[0222] The user interface 703 may include buttons, and the optional user interface may also include a standard wired interface or a wireless interface.

[0223] The network interface 704 may include, but is not limited to, a Bluetooth module, an NFC module, a Wi-Fi module, etc.

[0224] Among them, the processor 701 may include one or more processing cores. The processor 701 uses various interfaces and lines to connect various parts within the entire electronic device 700, and executes various functions and processes data of the routing device 700 by running or executing instructions, programs, code sets or instruction sets stored in the memory 705, and calling data stored in the memory 705. Optionally, the processor 701 can be implemented in at least one hardware form of DSP, FPGA, and PLA. The processor 701 can integrate one or a combination of CPU, GPU, modem, etc. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 701, and it can be implemented separately through a chip.

[0225] The memory 705 may include RAM or ROM. Optionally, the memory 705 includes a non-transitory computer-readable medium. The memory 705 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 705 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned method embodiments, etc.; the data storage area may store data involved in the above-mentioned method embodiments, etc. The memory 705 may optionally be at least one storage device located away from the aforementioned processor 701. As Figure 3 As shown, the memory 705 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an LED color changing application program of the display panel.

[0226] Specifically, the processor 701 may be used to call the LED color changing application of the display panel stored in the memory 705, and specifically perform the following operations:

[0227] Obtaining specification parameters of at least two groups of LEDs disposed on the display panel; wherein each group of LEDs includes at least two types of LEDs;

[0228] generating a moving path of the display panel according to specification parameters of at least two groups of LEDs;

[0229] The nozzle position of the piezoelectric injection valve is determined, and color change processing is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel.

[0230] In some possible embodiments, obtaining specification parameters of at least two groups of LEDs disposed on the display panel includes:

[0231] Get the size of each type of LED in each group of LEDs, as well as the distance between any two adjacent types of LEDs;

[0232] Get the distance between any two adjacent groups of LEDs;

[0233] Generating a moving path of a display panel according to specification parameters of at least two groups of LEDs includes:

[0234] The moving path of the display panel is generated according to the size of each type of LED, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs.

[0235] In some possible embodiments, before obtaining the specification parameters of at least two groups of LEDs arranged on the display panel, the method further includes:

[0236] Attach the display panel to the suction cup and control the suction cup to move to the preset zero position;

[0237] The suction cup is leveled at the preset zero position.

[0238] In some possible embodiments, determining a nozzle position of a piezoelectric injection valve includes:

[0239] Determining the number of nozzles of the piezoelectric injection valve according to the total number of at least two types of LEDs in each group of LEDs;

[0240] adjusting the distance between each nozzle of the piezoelectric injection valve according to the distance between any two adjacent types of LEDs;

[0241] The distance between the nozzle of the piezoelectric injection valve and the display panel is controlled to be a preset distance.

[0242] In some possible embodiments, each group of LEDs includes a first type of LED and a second type of LED;

[0243] After determining the nozzle position of the piezoelectric injection valve and before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0244] Performing a first loading process on a material tube of a piezoelectric injection valve corresponding to a first type of LED;

[0245] The material tube of the piezoelectric injection valve corresponding to the second type LED is subjected to a second filling process.

[0246] In some possible embodiments, a first loading process is performed on a material tube of a piezoelectric injection valve corresponding to a first type of LED, including:

[0247] Mixing a phosphor of a preset first concentration with a silica gel of a preset second concentration to obtain a mixture having a viscosity within a preset viscosity range and a solid content within a preset solid content range;

[0248] Filling the mixture into a feed pipe of a piezoelectric injection valve corresponding to a first type of LED;

[0249] Among them, the preset viscosity range is between 10000cp and 100000cp, and the preset solid content range is between 40% and 60%.

[0250] In some possible embodiments, after determining the nozzle position of the piezoelectric injection valve and before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0251] The piezoelectric injection valve is preheated so that the nozzle temperature of the piezoelectric injection valve is within a preset temperature range.

[0252] In some possible embodiments, after determining the nozzle position of the piezoelectric injection valve and before performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0253] The piezoelectric jet valve is subjected to a pre-printing process so that the material ejected by the piezoelectric jet valve is in a stable state.

[0254] In some possible embodiments, before determining the nozzle position of the piezoelectric injection valve and performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0255] Determine the size of the LED retaining wall according to the size of each type of LED and the distance between any two adjacent types of LEDs;

[0256] Printing LED retaining walls corresponding to each group of LEDs on the display panel according to the size of the LED retaining walls; wherein the LED retaining walls are used to fix the shape of each group of LEDs after the color change treatment;

[0257] The method includes: performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, including:

[0258] Color changing processing is performed on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve, the moving path of the display panel, and the LED retaining wall corresponding to each group of LEDs.

[0259] In some possible embodiments, performing color change processing on at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel includes:

[0260] Determining an initial position of the display panel according to the nozzle position of the piezoelectric injection valve, and controlling the display panel to move to the initial position of the display panel;

[0261] determining the working state of the nozzle of the piezoelectric injection valve according to the moving path of the display panel;

[0262] The display panel is controlled to move according to the moving path of the display panel, and the nozzle of the piezoelectric injection valve is controlled to perform spraying according to the working state.

[0263] In some possible embodiments, after the at least two groups of LEDs are subjected to color change processing according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes:

[0264] The at least two groups of LEDs that have undergone the color change treatment are cured.

[0265] The present application also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the above method are implemented. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD, a CD-ROM, a micro drive, and a magneto-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a DRAM, a VRAM, a flash memory device, a magnetic card or an optical card, a nanosystem (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.

[0266] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0267] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0268] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0269] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0270] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0271] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0272] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by entering a program to instruct related hardware, and the program may be stored in a computer-readable memory, which may include a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0273] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

Claims

1. A method for changing the color of LEDs in a display panel, It is characterized in that include: Obtaining specification parameters of at least two groups of LEDs arranged on the display panel; wherein each group of LEDs includes at least two types of LEDs, and the specification parameters of each group of LEDs include the size of each type of LED, the distance between any two adjacent types of LEDs, and obtaining the distance between any two adjacent groups of LEDs; Generating a moving path of the display panel according to specification parameters of the at least two groups of LEDs; Determine the nozzle position of the piezoelectric injection valve, and perform color changing processing on the at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, so as to keep the nozzle position of the piezoelectric injection valve unchanged, move the display panel disposed under the nozzle of the piezoelectric injection valve, and enable the nozzle of the piezoelectric injection valve to spray the color changing material on the LED surface of the display panel; Wherein, determining the nozzle position of the piezoelectric injection valve includes: Determining the number of nozzles of the piezoelectric injection valve according to the total number of at least two types of LEDs in each group of LEDs; adjusting the distance between each nozzle of the piezoelectric injection valve according to the distance between any two adjacent types of LEDs; The distance between the nozzle of the piezoelectric injection valve and the display panel is controlled to be a preset distance.

2. The method according to claim 1, It is characterized in that The obtaining of specification parameters of at least two groups of LEDs arranged on the display panel includes: Obtain the size of each type of LED in each group of LEDs, and the distance between any two adjacent types of LEDs; Obtain the distance between any two adjacent groups of LEDs; Generating the moving path of the display panel according to the specification parameters of the at least two groups of LEDs includes: The moving path of the display panel is generated according to the size of each type of LED, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs.

3. The method according to claim 1, It is characterized in that Before obtaining the specification parameters of at least two groups of LEDs arranged on the display panel, the method further includes: Adsorbing the display panel onto the suction cup, and controlling the suction cup to move to a preset zero position; The suction cup is subjected to a horizontal correction process at the preset zero position.

4. The method according to claim 1, It is characterized in that Each group of LEDs includes a first type of LED and a second type of LED; After determining the nozzle position of the piezoelectric injection valve and before performing color change processing on the at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes: Performing a first loading process on a material tube of the piezoelectric injection valve corresponding to the first type of LED; The material tube of the piezoelectric injection valve corresponding to the second type LED is subjected to a second filling process.

5. The method according to claim 4, It is characterized in that The first loading process is performed on the material tube of the piezoelectric injection valve corresponding to the first type LED, including: Mixing a phosphor of a preset first concentration with a silica gel of a preset second concentration to obtain a mixture having a viscosity within a preset viscosity range and a solid content within a preset solid content range; Filling the mixture into a material pipe of the piezoelectric injection valve corresponding to the first type of LED; Wherein, the preset viscosity range is between 10000cp and 100000cp, and the preset solid content range is between 40% and 60%.

6. The method according to claim 1, It is characterized in that After determining the nozzle position of the piezoelectric injection valve and before performing color change processing on the at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes: The piezoelectric injection valve is preheated so that the nozzle temperature of the piezoelectric injection valve is within a preset temperature range.

7. The method according to claim 1, It is characterized in that After determining the nozzle position of the piezoelectric injection valve and before performing color change processing on the at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes: The piezoelectric jet valve is subjected to a pre-printing process so that the material ejected by the piezoelectric jet valve is in a stable state.

8. The method according to claim 2, It is characterized in that Before determining the nozzle position of the piezoelectric injection valve and performing color change processing on the at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes: Determine the size of the LED retaining wall according to the size of each type of LED and the distance between any two adjacent types of LEDs; Printing LED retaining walls corresponding to each group of LEDs on the display panel according to the size of the LED retaining walls; wherein the LED retaining walls are used to fix the shape of each group of LEDs after the color change treatment; The color changing process of the at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel includes: The at least two groups of LEDs are subjected to color change processing according to the nozzle position of the piezoelectric injection valve, the moving path of the display panel, and the LED retaining wall corresponding to each group of LEDs.

9. The method according to any one of claims 1 to 8, It is characterized in that The color changing process of the at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel includes: Determining an initial position of the display panel according to a nozzle position of the piezoelectric injection valve, and controlling the display panel to move to the initial position of the display panel; determining a working state of a nozzle of the piezoelectric injection valve according to a moving path of the display panel; The display panel is controlled to move according to the moving path of the display panel, and the nozzle of the piezoelectric injection valve is controlled to perform spraying processing according to the working state.

10. The method according to claim 9, It is characterized in that After the at least two groups of LEDs are subjected to color changing processing according to the nozzle position of the piezoelectric injection valve and the moving path of the display panel, the method further includes: The at least two groups of LEDs that have undergone the color change treatment are cured.

11. An LED color changing device for a display panel, It is characterized in that include: A parameter acquisition module, used to acquire specification parameters of at least two groups of LEDs arranged on the display panel; wherein each group of LEDs includes at least two types of LEDs, and the specification parameters of each group of LEDs include the size of each type of LED, the distance between any two adjacent types of LEDs, and the distance between any two adjacent groups of LEDs; A path generation module, used for generating a moving path of the display panel according to the specification parameters of the at least two groups of LEDs; a motion control module, for determining a nozzle position of a piezoelectric injection valve, and performing a color changing process on the at least two groups of LEDs according to the nozzle position of the piezoelectric injection valve and a moving path of the display panel, so as to keep the nozzle position of the piezoelectric injection valve unchanged, and move the display panel disposed under the nozzle of the piezoelectric injection valve, so that the nozzle of the piezoelectric injection valve sprays a color changing material on a surface of the LED of the display panel; Wherein, determining the nozzle position of the piezoelectric injection valve includes: Determining the number of nozzles of the piezoelectric injection valve according to the total number of at least two types of LEDs in each group of LEDs; adjusting the distance between each nozzle of the piezoelectric injection valve according to the distance between any two adjacent types of LEDs; The distance between the nozzle of the piezoelectric injection valve and the display panel is controlled to be a preset distance.

12. An LED color changing device for a display panel, comprising a processor and a memory, Features: The processor is connected to the memory; The memory is used to store executable program code; The processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to execute the steps of the method according to any one of claims 1 to 10.

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