A printing method and device for backlight plate reflective layer

Abstract

The present application discloses a method and device for printing a reflective layer of a backlight panel, the method comprising obtaining the specification parameters of the light-emitting diode on the backlight panel, and generating a first path according to the specification parameters of the light-emitting diode and a preset first calibration parameter; controlling the dispensing valve to perform a sacrificial layer printing process on all light-emitting diodes according to the first path; determining at least two center points in the area of ​​the backlight panel excluding all light-emitting diodes based on the specification parameters of the light-emitting diodes, and controlling the injection valve to perform a reflective layer printing process on all center points; and cleaning all sacrificial layers on the backlight panel. Compared with the traditional screen printing process, the sacrificial layer dispensing method is used to give priority to protecting the light-emitting diodes, thereby avoiding the problem of light-emitting diode immersion caused by the light-emitting diodes being too small, and in the embodiment of the present application, the sacrificial layer material and the reflective layer material are not similar and soluble, further ensuring that the reflective layer ink cannot immerse the light-emitting diodes.

Description

Technical Field

[0001] The present application belongs to the field of semiconductor processing technology, and in particular relates to a printing method and device for a backlight plate reflective layer. Background Art

[0002] As semiconductor technology becomes more and more popular, the processing accuracy of semiconductors has become more and more mature. Generally, in order to increase the reflection efficiency of the light emitting diode (also called LED) backlight panel in the semiconductor, a backlight reflection layer can be made on the circuit of the light emitting diode backlight panel.

[0003] In the prior art, the process of making the backlight reflective layer is mostly a screen printing process, that is, the reflective layer is screen printed on the unbonded backlight panel, and then the LED die bonding process is performed. However, although this screen printing process is simple and mature, as the resolution, reflectivity and substrate size of the LED backlight panel gradually increase, there are several defects as follows:

[0004] 1) The traditional screen printing process has low precision and can only use coarse mesh to open the opening around the LED. When the opening is too small, the LED chip will be immersed, resulting in a large gap between the reflective layer and the edge of the LED, and even causing the LED light shadow phenomenon;

[0005] 2) The screen printing process can only be carried out before the LED die bonding. After the screen printing ink is cured, the glass will bend as a whole. The thinner the glass, the more serious the warping. This brings great difficulties to the subsequent die bonding process with high precision requirements.

[0006] 3) For LED backlight panels of different sizes, the screen printing process needs to replace the screen plate, but the production cost of the screen plate is high, which is easy to increase the cost. Summary of the invention

[0007] The present application aims to solve the problem that the traditional screen printing process mentioned above has low precision and can only use a coarse mesh to open the opening around the light-emitting diode. When the opening is too small, the light-emitting diode chip will be immersed, which will lead to a large gap between the reflective layer and the edge of the light-emitting diode, and even cause the light shadow phenomenon of the light-emitting diode; the screen printing process can only be carried out before the light-emitting diode is solidified, and the screen printing ink will cause the glass to warp as a whole after solidification. The thinner the glass, the more serious the warping, which brings great difficulties to the subsequent solidification process with high precision requirements; for light-emitting diode backlight panels of different sizes, the screen needs to be replaced when using the screen printing process, but the production cost of the screen is high, which is easy to increase the cost and other technical defects. A printing method and device for the reflective layer of the backlight is proposed, and its technical solution is as follows:

[0008] In a first aspect, an embodiment of the present application provides a method for printing a reflective layer of a backlight plate, comprising:

[0009] Obtaining specification parameters of the light-emitting diode on the backlight panel, and generating a first path according to the specification parameters of the light-emitting diode and a preset first calibration parameter;

[0010] Controlling the dispensing valve to perform a sacrificial layer printing process on all the light emitting diodes on the backlight panel according to the first path until each light emitting diode is wrapped by the sacrificial layer;

[0011] Based on the specification parameters of the light-emitting diodes, at least two center points are determined in the backlight panel except for the area of ​​all the light-emitting diodes, and the jet valve is controlled to print the reflective layer on all the center points; wherein the height of the reflective layer is a preset height;

[0012] All sacrificial layers on the backlight panel are cleaned.

[0013] In an optional solution of the first aspect, before obtaining the specification parameters of the light emitting diode on the backlight panel and generating the first path according to the specification parameters of the light emitting diode and the preset first calibration parameters, the method further includes:

[0014] The vacuum plasma equipment is set based on preset working parameters, and the set vacuum plasma equipment is controlled to pre-process the backlight panel.

[0015] In another optional solution of the first aspect, before generating the first path according to the specification parameters of the light emitting diode and the preset first calibration parameters, the method further includes:

[0016] The backlight plate is fixed on the suction cup, and at least two marking points on the backlight plate are identified based on the top vertical camera;

[0017] Determine whether the line formed by any two adjacent marking points is parallel to the calibration line; wherein the calibration line corresponds to the moving direction of the dispensing valve;

[0018] When it is detected that the line formed by any two adjacent marking points is not parallel to the calibration line, the suction cup is rotated based on the angle between the line formed by any two adjacent marking points and the calibration line until the line formed by any two adjacent marking points is parallel to the calibration line;

[0019] When it is detected that the line formed by any two adjacent marking points is parallel to the calibration line, the position of each marking point in the preset spatial rectangular coordinate system is determined, and the initial printing position is converted according to the position of at least one marking point, the position relationship of each light-emitting diode on the backlight plate, and the number of dispensing valves;

[0020] Generating a first path according to specification parameters of the light emitting diode and a preset first calibration parameter includes:

[0021] A first path is generated according to specification parameters of the light emitting diode, a preset first calibration parameter and an initial printing position.

[0022] In another optional solution of the first aspect, generating a first path according to specification parameters of the light emitting diode, a preset first calibration parameter, and an initial printing position includes:

[0023] Controlling the laser distance measuring sensor to scan the surface of the backlight plate to obtain a first height between the laser distance measuring sensor and the backlight plate;

[0024] Calculate a second height between the dispensing valve and the backlight panel based on a preset first calibration parameter and the first height;

[0025] Generate a first initial moving path according to the second height and the initial printing position;

[0026] According to the arrangement of all light emitting diodes in the specification parameters of the light emitting diodes and the number of the glue dispensing valves, a glue dispensing movement path is generated, and the first initial movement path and the glue dispensing movement path are used as the first path.

[0027] In another optional solution of the first aspect, controlling the dispensing valve to perform a sacrificial layer printing process on all light-emitting diodes on the backlight panel according to the first path includes:

[0028] Determine a first printing volume according to the printing requirement parameters of the backlight plate, and perform a difference calculation between the first printing volume and the volume of the light emitting diode to obtain a second printing volume;

[0029] Determine, based on the second printing volume, the time required for the dispensing valve to print the sacrificial layer of each light-emitting diode under a preset pressure;

[0030] The dispensing valve is controlled to move to the initial printing position according to the first initial moving path, and the dispensing valve is controlled to perform sacrificial layer printing processing on all light emitting diodes according to the dispensing moving path and the time required to print the sacrificial layer of each light emitting diode.

[0031] In another optional solution of the first aspect, after controlling the dispensing valve to perform a sacrificial layer printing process on all light-emitting diodes on the backlight panel according to the first path, and before determining at least two center points in an area of ​​the backlight panel excluding all light-emitting diodes based on specification parameters of the light-emitting diodes, the method further includes:

[0032] The dispensing valve is controlled to move to the top of each marking point in turn, and according to the time required to print the sacrificial layer of each light-emitting diode, the dispensing valve is controlled to print the sacrificial layer for all marking points.

[0033] In another optional solution of the first aspect, after controlling the dispensing valve to perform a sacrificial layer printing process on all light-emitting diodes on the backlight panel according to the first path, and before determining at least two center points in an area of ​​the backlight panel excluding all light-emitting diodes based on specification parameters of the light-emitting diodes, the method further includes:

[0034] Generate a fence printing path according to the edge of the backlight panel;

[0035] The dispensing valve is controlled to perform sacrificial layer printing according to the enclosure printing path; wherein the enclosure height is greater than a preset height.

[0036] In another optional solution of the first aspect, based on the specification parameters of the light emitting diodes, at least two center points are determined in the area of ​​the backlight panel excluding all the light emitting diodes, including:

[0037] Based on the arrangement of all the light emitting diodes in the specification parameters of the light emitting diodes, the backlight panel is divided into at least two areas; wherein the area of ​​each area is the same, the total number of light emitting diodes contained in each area is an even number, and the total number of light emitting diodes contained in each area is the same;

[0038] A central point of each region is determined in each region, and each central point of each region is used as at least two central points of a region in the backlight panel excluding all light emitting diodes.

[0039] In another optional solution of the first aspect, controlling the jet valve to perform reflective layer printing processing on all center points includes:

[0040] Calculating a third height between the injection valve and the backlight panel based on a preset second calibration parameter and the first height;

[0041] Generate a second initial moving path according to the third height and the positions of all center points in a preset spatial rectangular coordinate system;

[0042] Generate an injection movement path according to the positional relationship of all center points and the number of injection valves, and use the second initial movement path and the injection movement path as the second path;

[0043] The jet valve is controlled to follow the second path to perform reflective layer printing processing on all center points.

[0044] In another optional solution of the first aspect, controlling the jet valve to perform reflective layer printing processing on all center points according to the second path includes:

[0045] Calculate a third printing volume according to the area of ​​the region and the preset height;

[0046] Determine, based on the third printing volume, the time required for the jet valve to jet the reflective layer at each center point under a preset pressure;

[0047] The jet valve is controlled to move according to the second initial movement path, and the jet valve is controlled to perform reflective layer printing processing on all center points according to the jet movement path and the time required to jet the reflective layer at each center point.

[0048] In another optional solution of the first aspect, after controlling the jet valve to print the reflective layer on all the center points and before cleaning all the sacrificial layers on the backlight plate, the method further includes:

[0049] Performing static treatment on the backlight panel at preset time intervals;

[0050] The backlight panel after the static treatment is cured.

[0051] In another optional solution of the first aspect, after all sacrificial layers on the backlight panel are cleaned, the method further comprises:

[0052] The cleaned backlight panel is dried.

[0053] In a second aspect, an embodiment of the present application provides a printing device for a backlight plate reflective layer, comprising:

[0054] A parameter processing module, used for acquiring specification parameters of the light emitting diode on the backlight panel, and generating a first path according to the specification parameters of the light emitting diode and a preset first calibration parameter;

[0055] A first printing module, used for controlling the dispensing valve to perform a sacrificial layer printing process on all the light emitting diodes on the backlight panel according to a first path, until each light emitting diode is wrapped by the sacrificial layer;

[0056] The second printing module is used to determine at least two center points in the backlight panel excluding the area of ​​all light-emitting diodes based on the specification parameters of the light-emitting diodes, and control the jet valve to print the reflective layer on all the center points; wherein the height of the reflective layer is a preset height;

[0057] The cleaning module is used to clean all sacrificial layers on the backlight panel.

[0058] In a third aspect, an embodiment of the present application further provides a printing device for a backlight plate reflective layer, including a processor and a memory;

[0059] The processor is connected to the memory;

[0060] A memory for storing executable program codes;

[0061] 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 printing method of the backlight plate reflective layer provided by the first aspect of the embodiment of the present application or any implementation method of the first aspect.

[0062] 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 method for printing a backlight panel reflective layer provided in the first aspect of the embodiment of the present application or any one of the implementation methods of the first aspect can be implemented.

[0063] Beneficial effects:

[0064] In the process of printing the reflective layer on the backlight panel, the specification parameters of the light-emitting diodes on the backlight panel can be obtained, and a first path can be generated according to the specification parameters of the light-emitting diodes and the preset first calibration parameters; the dispensing valve is controlled to perform sacrificial layer printing processing on all the light-emitting diodes on the backlight panel according to the first path until each light-emitting diode is wrapped by the sacrificial layer; based on the specification parameters of the light-emitting diodes, at least two center points are determined in the area of ​​the backlight panel excluding all light-emitting diodes, and the injection valve is controlled to perform reflective layer printing processing on all the center points; all sacrificial layers on the backlight panel are cleaned. Compared with the traditional screen printing process, the sacrificial layer dispensing method is used to give priority to protecting the light-emitting diode, thereby avoiding the problem of light-emitting diode immersion caused by the light-emitting diode being too small, and in the embodiment of the present application, the sacrificial layer material and the reflective layer material are not similar and miscible, further ensuring that the reflective layer ink cannot immerse the light-emitting diode; secondly, the sacrificial layer dispensing method can effectively control the dispensing pressure and time, thereby indirectly controlling the spacing between the reflective layer and the light-emitting diode, and improving the precise control of the reflectivity of the backlight panel; secondly, for light-emitting diode backlight panels of different sizes, the present application scheme only needs to increase or decrease the number of printing dots, and there is no need to make additional printing screens; secondly, the present application scheme can be carried out after the crystal bonding process to provide a guarantee for improving the yield of the crystal bonding process. Of course, it can also be performed before the crystal bonding process, and it is not limited to this here. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] 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.

[0066] Figure 1An overall flow chart of a method for printing a backlight plate reflective layer provided in an embodiment of the present application;

[0067] Figure 2 A schematic diagram of a printing structure of a backlight reflective layer provided in an embodiment of the present application;

[0068] Figure 3 A schematic diagram of the printing effect of a sacrificial layer provided in an embodiment of the present application;

[0069] Figure 4 A schematic diagram of the effect of a center point provided in an embodiment of the present application;

[0070] Figure 5 A schematic diagram of the printing effect of a reflective layer provided in an embodiment of the present application;

[0071] Figure 6 A schematic diagram of the printing effect of a backlight reflective layer provided in an embodiment of the present application;

[0072] Figure 7 A schematic diagram of the printing effect of another backlight plate reflective layer provided in an embodiment of the present application;

[0073] Figure 8 A schematic diagram of the structure of a printing device for a backlight reflective layer provided in an embodiment of the present application;

[0074] Fig. 9 A schematic structural diagram of another device for printing a backlight reflective layer provided in an embodiment of the present application. DETAILED DESCRIPTION

[0075] 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.

[0076] 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.

[0077] 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.

[0078] See also Figure 1 , Figure 1 An overall flow chart of a method for printing a backlight plate reflective layer provided in an embodiment of the present application is shown.

[0079] like Figure 1 As shown, the printing method of the backlight plate reflective layer may at least include the following steps:

[0080] Step 102: Obtain specification parameters of the light emitting diode on the backlight panel, and generate a first path according to the specification parameters of the light emitting diode and a preset first calibration parameter.

[0081] In the embodiment of the present application, the printing method of the backlight reflective layer can be but is not limited to being applied to a control terminal of a controllable motion platform, and the control platform can at least include a marble suction cup for fixing the backlight panel, a top vertical camera arranged on the top of the marble suction cup, a gantry for controlling the moving direction of one or more dispensing valves, and a gantry for controlling the moving direction of one or more injection valves. Among them, one or more dispensing valves can be used to print the sacrificial layer of all light-emitting diodes on the backlight panel, and the type of the dispensing valve can be but is not limited to a pneumatic dispensing valve, a piezoelectric injection valve, or a pneumatic striker valve; one or more injection valves can be used to print the reflective layer on the area where all sacrificial layers are removed from the backlight panel after all light-emitting diodes have been printed with the sacrificial layer, and the type of the injection valve can be but is not limited to a pneumatic striker valve, a piezoelectric injection valve, or other valves that can quantitatively dispense glue. It can be understood that each backlight panel can include at least light-emitting diodes arranged in an m*n array, and the length, width, and height of each light-emitting diode are the same, and the distance between any two adjacent light-emitting diodes in the same row is the same, and the distance between any two adjacent light-emitting diodes in the same column is also the same.

[0082] See also Figure 2 , Figure 2 A schematic diagram of a printing structure of a backlight plate reflective layer provided in an embodiment of the present application is shown. Figure 2As shown, the printing structure of the backlight reflective layer may include a gantry 1 for controlling the movement of a pneumatic dispensing valve, a gantry 2 for controlling the movement of a pneumatic striker valve, and a base for carrying the backlight, the gantry 1 includes at least two pneumatic dispensing valves (the spacing between any two adjacent pneumatic dispensing valves is adjustable, and each pneumatic dispensing valve can be individually controlled to move on the gantry 1 along the plane X-axis direction), the gantry 2 includes at least two pneumatic striker valves (the spacing between any two adjacent pneumatic striker valves is adjustable, and each pneumatic striker valve can be individually controlled to move on the gantry 2 along the plane X-axis direction), and the moving directions of the gantry 1 and the gantry 2 are both parallel to the plane Y-axis, and the base is also provided with a marble suction cup for adsorbing the backlight. It can be understood that the backlight may include a printing substrate and a light-emitting diode arranged on the printing substrate, and the bottom of the printing substrate is adsorbed on the marble suction cup of the base.

[0083] Here, after the sacrificial layer and the reflective layer are printed on the backlight panel in sequence, the control terminal can transfer the backlight panel to the cleaning structure, and remove the sacrificial layer on the backlight panel with a sacrificial layer good solvent to obtain a backlight panel printed with a reflective layer.

[0084] Specifically, in the process of printing the reflective layer on the backlight panel, the specification parameters of the light-emitting diode on the backlight panel can be obtained. The specification parameters of the light-emitting diode may include but are not limited to the length, height, width of the light-emitting diode, the distance between any two adjacent light-emitting diodes in each row on the backlight panel, the distance between any two adjacent light-emitting diodes in each column on the backlight panel, the positional relationship of each light-emitting diode on the backlight panel, and the arrangement of the light-emitting diodes. Among them, the positional relationship of each light-emitting diode on the backlight panel can be understood as the distance between the center point (or edge) of each light-emitting diode and the edge of the backlight panel, and of course it can also be understood as the coordinates of the center point (or four vertices) of each light-emitting diode in the rectangular coordinate system of the plane where the backlight panel is located, which is not limited to this here.

[0085] It is understandable that the specification parameters of the light-emitting diode in the embodiment of the present application may be fixed parameters, for example but not limited to being pre-set in the memory of the control terminal; or the control terminal may perform image recognition processing on the backlight panel to obtain it through a visual algorithm, which is not limited here.

[0086] Furthermore, after obtaining the specification parameters of the light-emitting diode, the first path for moving the dispensing valve can be generated in combination with the light-emitting diode and the preset first calibration parameter, wherein the preset first calibration parameter can be used to characterize the calibration height parameter of the dispensing valve, which is mainly used to adjust the height between the dispensing valve and the backlight panel to improve the printing effect and accuracy of the sacrificial layer of each light-emitting diode by the dispensing valve.

[0087] As an option of the embodiment of the present application, before obtaining the specification parameters of the light-emitting diode on the backlight panel and generating the first path according to the specification parameters of the light-emitting diode and the preset first calibration parameters, the method further includes:

[0088] The vacuum plasma equipment is set based on preset working parameters, and the set vacuum plasma equipment is controlled to pre-process the backlight panel.

[0089] In order to better improve the surface tension of the backlight panel, before printing the reflective layer on the backlight panel, the vacuum plasma device can be set based on the preset working parameters, such as but not limited to setting the working power of the vacuum plasma device to a specified power and the working time to a specified working time, and the backlight panel is placed in the set vacuum plasma device for pretreatment. The pretreatment method can be to treat the surface of the backlight panel with oxygen in a vacuum environment, so that the surface of the backlight panel increases hydrogen bonds while removing impurities, thereby increasing the surface tension of the backlight panel; or to treat the surface of the backlight panel with argon in a vacuum environment, so that the surface of the backlight panel becomes rougher while removing impurities, thereby increasing the surface tension of the backlight panel.

[0090] It is understandable that in the embodiment of the present application, the tension on the surface of the backlight panel can be made consistent by pre-processing the backlight panel, for example but not limited to controlling the tension on the surface of the backlight panel to be greater than 50 N•m.

[0091] As another option of the embodiment of the present application, before generating the first path according to the specification parameters of the light emitting diode and the preset first calibration parameters, the method further includes:

[0092] The backlight plate is fixed on the suction cup, and at least two marking points on the backlight plate are identified based on the top vertical camera;

[0093] Determine whether the line formed by any two adjacent marking points is parallel to the calibration line; wherein the calibration line corresponds to the moving direction of the dispensing valve;

[0094] When it is detected that the line formed by any two adjacent marking points is not parallel to the calibration line, the suction cup is rotated based on the angle between the line formed by any two adjacent marking points and the calibration line until the line formed by any two adjacent marking points is parallel to the calibration line;

[0095] When it is detected that the line formed by any two adjacent marking points is parallel to the calibration line, the position of each marking point in the preset spatial rectangular coordinate system is determined, and the initial printing position is converted according to the position of at least one marking point, the position relationship of each light-emitting diode on the backlight plate, and the number of dispensing valves;

[0096] Generating a first path according to specification parameters of the light emitting diode and a preset first calibration parameter includes:

[0097] A first path is generated according to specification parameters of the light emitting diode, a preset first calibration parameter and an initial printing position.

[0098] In order to ensure the effectiveness and accuracy of the moving path, the angle between the line formed by any two adjacent marking points on the backlight plate and the calibration line can be used to effectively determine whether the backlight plate needs to be rotated, thereby ensuring that the direction of movement of the dispensing valve along the plane X-axis is parallel to the long side of the backlight plate during printing, and the direction of movement along the plane Y-axis is parallel to the wide side of the backlight plate. Among them, the calibration line can be a line segment parallel to the direction of movement of the dispensing valve along the plane X-axis, and a line segment parallel to the direction of movement of the dispensing valve along the plane Y-axis, and the line segment parallel to the direction of movement of the dispensing valve along the plane X-axis and the line segment parallel to the direction of movement of the dispensing valve along the plane Y-axis are perpendicular to each other.

[0099] Specifically, the bottom of the backlight panel can be adsorbed on the marble suction cup, and then the top vertical camera is controlled to move to the top of the backlight panel to photograph the upper surface of the backlight panel, and at least two marking points on the backlight panel are identified in the photographed image through a visual algorithm. It can be understood that at least two marking points are pre-set on the backlight panel in the embodiment of the present application, and the position of each marking point on the backlight panel is relatively fixed. For example, a marking point is set at each of the four vertices of the backlight panel, and the line between any two adjacent marking points can be kept parallel to the long side or the wide side of the backlight panel.

[0100] Furthermore, after identifying the marking points on the backlight panel, any two adjacent marking points can be connected by lines, and it can be detected whether the angle between the connecting line and any calibration line is 0 degrees or 90 degrees. It can be understood that when it is detected that the angle between the connecting line formed by any two adjacent marking points and any calibration line is 0 degrees or 90 degrees, it indicates that the connecting line formed by any two adjacent marking points is parallel to any calibration line, which ensures that the direction of movement of the dispensing valve along the plane X-axis can remain parallel to the long side of the backlight panel, and the direction of movement along the plane Y-axis can remain consistent with the wide side of the backlight panel.

[0101] Furthermore, after determining that the line formed by any two adjacent marking points is parallel to any calibration line, the position of each marking point in the preset spatial rectangular coordinate system can be determined (which can be expressed by coordinates). The preset spatial rectangular coordinate system can be but is not limited to a spatial rectangular coordinate system established on the plane where the marble suction cup for fixing the backlight panel is located. The XOY plane of the spatial rectangular coordinate system is the same as the plane where the marble suction cup for fixing the backlight panel is located. The Z axis of the spatial rectangular coordinate system is perpendicular to the plane where the marble suction cup for fixing the backlight panel is located. The origin of the spatial rectangular coordinate system is any point on the plane where the marble suction cup for fixing the backlight panel is located.

[0102] Since the positional relationship between each marking point and each light-emitting diode on the backlight panel is fixed, after determining the position of each marking point in the preset spatial rectangular coordinate system, the position of each light-emitting diode in the preset spatial rectangular coordinate system can be converted according to the position of any marking point and the fixed position of each light-emitting diode on the backlight panel. Here, the position of each light-emitting diode in the preset spatial rectangular coordinate system can be, but is not limited to, represented by the coordinates of the center point of each light-emitting diode in the preset spatial rectangular coordinate system. Then, the initial printing position corresponding to the dispensing valve can be determined according to the number of dispensing valves and the position of each light-emitting diode in the preset spatial rectangular coordinate system. Among them, when the number of dispensing valves is 1, the position of the first light-emitting diode among all the light-emitting diodes can be, but is not limited to, used as the initial printing position corresponding to the dispensing valve. The first light-emitting diode can be understood as the light-emitting diode in the first row and first column in the arrangement of all light-emitting diodes. When there are multiple dispensing valves, the number of dispensing valves can be determined, but not limited to, based on the number of LEDs included in each row of the arrangement of all LEDs. For example, when the number of LEDs included in each row is 4, the number of dispensing valves can be determined to be 4, and then the position of each LED in the first row of the arrangement of all LEDs can be used as the initial printing position of each dispensing valve, and the position of each LED here corresponds to each dispensing valve one by one (for example, the position of the first LED in the first row corresponds to the initial printing position of the first dispensing valve, the position of the second LED in the first row corresponds to the initial printing position of the second dispensing valve, and so on). It can be understood that when the number of dispensing valves is the same as the number of LEDs included in each row, it is necessary to control the spacing between any two adjacent dispensing valves to be the same as the spacing between any two adjacent LEDs in each row to ensure the printing accuracy of the sacrificial layer.

[0103] Of course, in the embodiment of the present application, as mentioned above, when the number of LEDs included in each row is 4, it can be determined that the number of dispensing valves can also be 2, that is to say, it is sufficient to satisfy the relationship that the number of LEDs and the number of dispensing valves are in a multiple relationship, and the number of dispensing valves can also be determined based on but not limited to the number of LEDs included in each column, which is not limited here.

[0104] Furthermore, after the initial printing position corresponding to the dispensing valve is obtained, a first path corresponding to the dispensing valve may be generated according to the specification parameters of the light-emitting diode, the preset first calibration parameters and the initial printing position.

[0105] It can also be understood that when it is detected that the angle between the connecting line and any calibration line is not 0 degrees or 90 degrees, it indicates that the connecting line formed by any two adjacent marking points is not parallel to any calibration line. Then, according to the angle between the connecting line and any calibration line, the suction cup can be controlled to rotate in the direction close to the calibration line, and the rotation angle is guaranteed to be the same as the angle between the connecting line and any calibration line, so that the connecting line formed by any two adjacent marking points is parallel to any calibration line. It can be understood that after the suction cup rotates until the connecting line formed by any two adjacent marking points is parallel to any calibration line, the above-mentioned steps can be referred to to obtain the initial printing position corresponding to the dispensing valve, and the first path corresponding to the dispensing valve is generated according to the specification parameters of the light-emitting diode, the preset first calibration parameters and the initial printing position.

[0106] As another option of the embodiment of the present application, generating a first path according to specification parameters of the light-emitting diode, a preset first calibration parameter and an initial printing position includes:

[0107] Controlling the laser distance measuring sensor to scan the surface of the backlight plate to obtain a first height between the laser distance measuring sensor and the backlight plate;

[0108] Calculate a second height between the dispensing valve and the backlight panel based on a preset first calibration parameter and the first height;

[0109] Generate a first initial moving path according to the second height and the initial printing position;

[0110] According to the arrangement of all light emitting diodes in the specification parameters of the light emitting diodes and the number of the glue dispensing valves, a glue dispensing movement path is generated, and the first initial movement path and the glue dispensing movement path are used as the first path.

[0111] In order to ensure that the sacrificial layer printed by the dispensing valve has a better effect, it is necessary to accurately control the distance between the nozzle and the light-emitting diode during the process of printing the sacrificial layer. Based on this, the height required for the dispensing valve to print the sacrificial layer on the backlight panel can be calculated based on but not limited to the height collected by the laser ranging sensor.

[0112] Specifically, in the process of generating the first path corresponding to the dispensing valve, the laser distance sensor can be controlled to scan the surface of the backlight panel to obtain the first height between the laser distance sensor and the backlight panel, and in combination with the preset first calibration parameter, the ratio between the first height and the preset first calibration parameter is calculated to obtain the second height between the dispensing valve and the backlight panel. Among them, the preset first calibration parameter can specifically correspond to the ratio between the calibration height of the laser distance sensor and the calibration height of the dispensing valve, the calibration height of the laser distance sensor can be understood as the height between the laser distance sensor and the preset calibration block, and the calibration height of the dispensing valve can be understood as the height between the dispensing valve and the preset calibration block when the dispensing valve prints the sacrificial layer on the preset calibration block with the best effect.

[0113] Furthermore, after obtaining the second height between the dispensing valve and the backlight panel, a first initial movement path corresponding to the dispensing valve can be generated according to the second height and the initial printing position, wherein the dispensing valve only changes its position during the movement according to the first initial movement path, and the sacrificial layer is not printed. For example, the first initial movement path can specifically include a first track generated according to the starting position of the dispensing valve and the initial printing position. It can be understood that when the dispensing valve moves according to the first track, it is directly above the light-emitting diode; and, a second track is generated according to the difference between the starting height corresponding to the starting position of the dispensing valve and the second height. Here, the second track can be understood as the dispensing valve moving vertically downward until the height between the dispensing valve and the light-emitting diode is the second height.

[0114] Further, after generating the first initial moving path, the dispensing moving path corresponding to the dispensing valve in the process of printing the sacrificial layer can be generated according to the arrangement of all light-emitting diodes and the number of dispensing valves. Here, the arrangement of all light-emitting diodes is expressed as m*n as an example (m corresponds to the number of rows, and n corresponds to the number of columns). When the number of dispensing valves is determined to be m, it indicates that the initial printing position of the dispensing valve corresponds to the position of the three light-emitting diodes in the first column, and then the dispensing moving path can be generated according to the spacing between any two adjacent light-emitting diodes in each row. It can be understood that in the embodiment of the present application, the spacing between any two adjacent light-emitting diodes in each row remains the same, and the spacing between any two adjacent light-emitting diodes in each column remains the same. In other words, the dispensing moving path may include multiple printing positions, each printing position corresponds to a light-emitting diode, and the spacing between any two adjacent printing positions is the spacing between any two adjacent light-emitting diodes in each row. Here, in the process of the dispensing valve moving along the dispensing movement path, whenever it is directly above the light-emitting diode, it is necessary to stop moving and control the dispensing valve to perform a sacrificial layer printing process on the light-emitting diode directly below.

[0115] Further, after obtaining the first initial movement path and the dispensing movement path respectively, the first initial movement path and the dispensing movement path can be used as the first path corresponding to the dispensing valve. It can be understood that in the embodiment of the present application, the speed corresponding to the dispensing valve during the movement process can be kept uniform to ensure stability during the printing process.

[0116] Step 104 , controlling the dispensing valve to perform a sacrificial layer printing process on all the light emitting diodes on the backlight panel according to the first path, until each light emitting diode is wrapped by the sacrificial layer.

[0117] Specifically, after generating the first path corresponding to the dispensing valve, the first printing volume can be determined according to the printing requirement parameters of the backlight plate, wherein the printing requirement parameters of the backlight plate can be understood as the opening area corresponding to each light-emitting diode on the backlight plate (a set value during the production process), and the area on the backlight plate except for all the opening areas needs to be printed with a reflective layer. It can be understood that when the opening shape corresponding to each light-emitting diode is a circle, the first printing volume can be the volume of a hemisphere corresponding to the circle, for example but not limited to, the radius of the circle can be calculated according to the area of ​​the circle (which can also be a set value), and the volume of the hemisphere can be calculated according to the radius of the circle and the sphere volume formula, that is, the first printing volume. It should be noted that the area corresponding to the first printing volume can completely contain the light-emitting diode. Of course, when the opening shape corresponding to each light-emitting diode is an ellipse, the first printing volume can be the volume of a semi-ellipsoid corresponding to the ellipse, which will not be described in detail here.

[0118] Since the sacrificial layer will completely cover the LEDs during the process of printing the sacrificial layer by the dispensing valve, based on this, the actual sacrificial layer volume of each LED printed by the dispensing valve should be the difference between the first printing volume and the volume of the LED. Further, after determining the first printing volume, the difference between the first printing volume and the volume of the LED can be calculated to obtain the second printing volume, which is the actual sacrificial layer volume of each LED printed by the dispensing valve.

[0119] Furthermore, after determining the actual volume of the sacrificial layer of each light-emitting diode printed by the dispensing valve, since the volume per unit time of the sacrificial layer output by the dispensing valve under different pressures is different, the corresponding volume per unit time can be determined according to the preset pressure, and the ratio of the actual volume of the sacrificial layer of each light-emitting diode printed by the dispensing valve to the volume per unit time is used to calculate the time required for the dispensing valve to print the sacrificial layer of each light-emitting diode under the preset pressure.

[0120] Furthermore, after determining the time required for printing the sacrificial layer of each light-emitting diode, the dispensing valve can be moved to the initial printing position according to the first initial moving path in the first path, and the dispensing valve does not perform the printing process of the sacrificial layer during this process; then, the dispensing valve is first controlled to print the sacrificial layer of the light-emitting diode directly below at the initial printing position according to the time required for printing the sacrificial layer of each light-emitting diode, and after the time required for printing the sacrificial layer of each light-emitting diode has passed, the dispensing valve is then controlled to move to the next printing position according to the dispensing moving path, and the dispensing valve is continued to be controlled to print the sacrificial layer of the light-emitting diode directly below at the next printing position according to the time required for printing the sacrificial layer of each light-emitting diode, until the printing process of the sacrificial layer of all light-emitting diodes is completed.

[0121] See here Figure 3 , Figure 3 A schematic diagram of the printing effect of a sacrificial layer provided in an embodiment of the present application is shown. Figure 3 As shown, the pressure supply pipeline of the dispensing valve can output a preset pressure into the material pipe of the dispensing valve, so that the printing nozzle of the dispensing valve prints a sacrificial layer toward the light-emitting diode directly below, and after the time required to print the sacrificial layer of each light-emitting diode, the sacrificial layer on the light-emitting diode can completely cover the light-emitting diode.

[0122] As another optional embodiment of the present application, after controlling the dispensing valve to perform sacrificial layer printing processing on all light-emitting diodes on the backlight panel according to the first path, based on the specification parameters of the light-emitting diodes, before determining at least two center points in the area of ​​the backlight panel excluding all light-emitting diodes, the method further includes:

[0123] The dispensing valve is controlled to move to the top of each marking point in turn, and according to the time required to print the sacrificial layer of each light-emitting diode, the dispensing valve is controlled to print the sacrificial layer for all marking points.

[0124] Since the marking points on the backlight panel are also suitable for multiple other processes, in order to avoid the marking points being covered by the reflective layer, before printing the reflective layer, a sacrificial layer printing process is required for each marking point, so that in the subsequent cleaning process of the sacrificial layer, the sacrificial layer corresponding to each marking point can be cleaned at the same time.

[0125] It can be understood that here, according to the position of each marking point, the dispensing valve can be controlled to move to the top of each marking point in turn to print the sacrificial layer, and the time for printing the sacrificial layer each time can be the same as the time required for printing the sacrificial layer of each light-emitting diode mentioned above, or it can be determined based on the area of ​​each marking point, but it is not limited to this here.

[0126] As another optional embodiment of the present application, after the controlling dispensing valve performs sacrificial layer printing processing on all the light-emitting diodes on the backlight panel according to the first path, before determining at least two center points in the area of ​​the backlight panel excluding all the light-emitting diodes based on the specification parameters of the light-emitting diodes, the method further includes:

[0127] Generate a fence printing path according to the edge of the backlight panel;

[0128] The dispensing valve is controlled to perform sacrificial layer printing processing according to the enclosure printing path; wherein the enclosure height is greater than the preset height.

[0129] In order to further improve the printing effect of the reflective layer, before the printing process of the reflective layer is performed, a corresponding enclosure printing path can be generated according to the edge of the backlight plate, and the dispensing valve can be controlled to continue to print the sacrificial layer according to the enclosure printing path after completing the sacrificial layer printing process for all light-emitting diodes, so as to obtain a sacrificial layer for enclosing the reflective layer, and the sacrificial layer for enclosing the reflective layer is attached to the side wall of the backlight plate. In order to reflect the effect of the enclosure reflective layer, during the printing process of the sacrificial layer, it is necessary to ensure that the enclosure height of the sacrificial layer for enclosing the reflective layer is greater than the preset height corresponding to the reflective layer, that is, the dispensing valve needs to continuously output the sacrificial layer during the process of moving according to the enclosure printing path, and after the height of the sacrificial layer output at the current position is greater than the preset height, the dispensing valve is controlled to move to the next position according to the enclosure printing path, and it is ensured that the height of the sacrificial layer output at the next position is greater than the preset height until the printing is completed.

[0130] It should be noted that in the embodiment of the present application, the order of the steps of printing a sacrificial layer on the marking points and printing a sacrificial layer on the edge of the backlight panel is not limited, and it only needs to be completed before printing the reflective layer.

[0131] Step 106 : Based on the specification parameters of the light emitting diodes, at least two center points are determined in the area of ​​the backlight panel excluding all the light emitting diodes, and the jet valve is controlled to perform reflective layer printing processing on all the center points.

[0132] After the printing process of the sacrificial layer is completed, the printing process of the reflective layer can be performed on the other areas of the backlight panel where all the sacrificial layers are removed.

[0133] Specifically, since the material viscosity of the reflective layer is different from the material viscosity of the sacrificial layer, the material viscosity of the reflective layer is low and has diffusivity, the backlight panel can be divided into at least two areas according to the arrangement of all light-emitting diodes on the backlight panel (refer to the m*n arrangement mentioned in the above embodiment), wherein the size of each area remains the same, the number of light-emitting diodes contained in each area remains the same, and the number of light-emitting diodes contained in each area is an even number.

[0134] It can be understood that in order to further ensure the printing effect of the reflective layer, the area corresponding to each of the above-mentioned regions is as small as possible. For example, the arrangement of all light-emitting diodes can be expressed as m*n, where m can be replaced by the product of a and b, and n can be replaced by the product of c and b. Then, the arrangement of the light-emitting diodes contained in each region can be expressed as a*c, and a total of b regions are included.

[0135] Furthermore, a center point can be determined in each area, and the position of each center point can be used as the printing position for the jet valve to print the reflective layer on each area. In other words, the jet valve can print the reflective layer on other areas of each area except the sacrificial layer by spraying the reflective layer on each center point and utilizing the diffusion property of the reflective layer material.

[0136] See here Figure 4 , Figure 4 A schematic diagram of the effect of a center point provided by an embodiment of the present application is shown. Figure 4 As shown, all the LEDs on the backlight panel are arranged in 4*4, so the backlight panel can be divided into 4 areas, each area contains LEDs arranged in 2*2, and the center point of each area can be used as the printing position of the injection valve to print the reflective layer in each area.

[0137] Furthermore, after determining the positions of all the center points, the third height between the injection valve and the backlight panel can be obtained by calculating the ratio between the first height and the preset second calibration parameter according to the first height between the laser distance sensor and the backlight panel mentioned in the above embodiment and in combination with the preset second calibration parameter. The preset second calibration parameter specifically corresponds to the ratio between the calibration height of the laser distance sensor and the calibration height of the injection valve, the calibration height of the laser distance sensor can be understood as the height between the laser distance sensor and the preset calibration block, and the calibration height of the injection valve can be understood as the height between the injection valve and the preset calibration block when the dispensing valve prints the reflective layer on the preset calibration block with the best effect.

[0138] Furthermore, after obtaining the third height between the jet valve and the backlight panel, the positions of all the center points in the preset spatial rectangular coordinate system (expressed as coordinates) can be converted according to the positional relationship of all the center points on the backlight panel, and the initial printing position corresponding to the jet valve can be determined in combination with the positions of all the center points and the number of the jet valves, and the second initial moving path can be generated according to the starting position of the jet valve, the initial printing position corresponding to the jet valve, and the third height between the jet valve and the backlight panel. It can be understood that when the number of the jet valves is 1, the initial printing position corresponding to the jet valve can be the position of the center point in the first row and the first column in the arrangement of all the center points; when the number of the jet valves is at least two, the number of the jet valves can be controlled to be the same as the number of rows according to, but not limited to, the number of rows in the arrangement of all the center points, and the positions of all the center points in the first column are used as the initial printing positions corresponding to the jet valve.

[0139] Here, during the process of the jet valve moving according to the second initial movement path, only the position changes, and the reflective layer is not printed. For example, the second initial movement path may specifically include a third track generated according to the starting position of the jet valve and the initial printing position. It can be understood that when the jet valve moves according to the third track, it is directly above the center point; and a fourth track generated according to the difference between the starting height corresponding to the starting position of the jet valve and the third height. Here, the fourth track can be understood as the jet valve moving vertically downward until the height between the jet valve and the center point is the third height.

[0140] Further, after the second initial movement path is generated, the corresponding injection movement path of the injection valve in the process of printing the reflective layer can be generated according to the positional relationship of all the center points and the number of injection valves. Here, the arrangement of all the center points is expressed as m*n as an example (m corresponds to the number of rows, and n corresponds to the number of columns). When the number of injection valves is determined to be m, it indicates that the initial printing position of the injection valve corresponds to the position of the three center points of the first column, and then the injection movement path can be generated according to the spacing between any two adjacent center points in each row. It can be understood that in the embodiment of the present application, the spacing between any two adjacent center points in each row remains the same, and the spacing between any two adjacent center points in each column remains the same. In other words, the injection movement path may include multiple printing positions, each printing position corresponds to a center point, and the spacing between any two adjacent printing positions is the spacing between any two adjacent center points in each row. Here, in the process of the injection valve moving along the injection movement path, whenever it is directly above the center point, it is necessary to stop moving and control the injection valve to perform reflective layer printing on the center point directly below.

[0141] Furthermore, after obtaining the second initial moving path and the injection moving path respectively, the second initial moving path and the injection moving path can be used as the second path corresponding to the injection valve. It can be understood that in the embodiment of the present application, the speed corresponding to the injection valve during the movement process can be kept uniform to avoid violent shaking of the reflective layer material in the material pipe of the injection valve.

[0142] Since the material of the reflective layer is diffusible during the process of the jet valve printing the reflective layer, based on this, the volume of the reflective layer printed by the jet valve in each area should be the product of the area of ​​each area and the preset height, that is, the third printing volume corresponding to the jet valve. Further, after determining the third printing volume, since the unit time volume of the reflective layer output by the jet valve under different pressures is different, the corresponding unit time volume can be determined according to the preset pressure, and the ratio of the volume of the reflective layer printed by the jet valve in each area to the unit time volume is used to calculate the time required for the jet valve to print the reflective layer in each area under the preset pressure.

[0143] Furthermore, after determining the time required for printing the reflective layer in each area, the jet valve can be moved to the initial printing position according to the second initial moving path in the second path, during which the jet valve does not print the reflective layer; then, the jet valve is first controlled to print the reflective layer on the center point directly below at the initial printing position according to the time required for printing the reflective layer in each area, and after the time required for printing the reflective layer in each area, the jet valve is then controlled to move to the next printing position according to the jet moving path, and the jet valve is continued to be controlled to print the reflective layer on the center point directly below at the next printing position according to the time required for printing the reflective layer in each area, until the printing of the reflective layer is completed for all areas.

[0144] See also Figure 5 , Figure 5 A schematic diagram of the printing effect of a reflective layer provided in an embodiment of the present application is shown. Figure 5 As shown, the schematic diagram on the left shows the process of the first center point on the backlight panel being processed by the jet valve for printing the reflective layer, and the reflective layer material diffuses from the position of the first center point to the surroundings. At this time, the surroundings of the first center point include four light-emitting diodes covered with sacrificial layers. The schematic diagram on the right shows the effect of the reflective layer sprayed on each center point on the backlight panel after diffusion and all the sacrificial layers, wherein each sacrificial layer is surrounded by the reflective layer.

[0145] Step 108: Clean all sacrificial layers on the backlight panel.

[0146] Specifically, after the reflective layer printing process is completed for all center points, the backlight panel can be left to stand for a preset time interval (for example but not limited to 0.5 min to 1 min) by utilizing the diffusivity of the reflective layer material to allow the reflective layer on the backlight panel to be fully integrated.

[0147] Furthermore, after the backlight panel has been subjected to the static treatment, the backlight panel can be transferred to a vacuum oven (the setting parameters of the vacuum oven can be but are not limited to a heating rate of 10°C / min and a vacuum degree of -0.085) to cure the backlight panel after the static treatment, thereby avoiding the occurrence of a coffee ring phenomenon on the backlight panel.

[0148] Furthermore, after the backlight panel is cured, the cured backlight panel can be transferred to a cleaning mechanism, and the sacrificial layer on the backlight panel can be removed using a sacrificial layer good solvent. After all the sacrificial layers are removed, the backlight panel can be transferred to a constant temperature drying oven for drying, and the entire reflective layer printing process is completed.

[0149] See also Figure 6 , Figure 6 FIG. 1 is a schematic diagram showing the printing effect of a backlight reflective layer provided in an embodiment of the present application. Figure 6 As shown, each small rectangular area may be a light-emitting diode, the white elliptical area may be the area of ​​the sacrificial layer covering each light-emitting diode after cleaning, the large rectangular area may be a backlight panel, and the other areas in the backlight panel except all white elliptical areas are reflective layer areas.

[0150] See also Figure 7 , Figure 7 A schematic diagram showing the printing effect of another backlight reflective layer provided in an embodiment of the present application is shown. Figure 7 As shown, the backlight panel in the printing effect schematic diagram has not been cleaned, each small rectangular area can be a light-emitting diode, the elliptical area can be a sacrificial layer area covering each light-emitting diode, the large rectangular area with a light-colored frame can be the backlight panel, the area between the large rectangular area with a dark-colored frame and the large rectangular area with a light-colored frame can be the dam area around the backlight panel, and the other areas in the backlight panel except all the white elliptical areas are the reflective layer areas.

[0151] In the embodiment of the present application, the material viscosity of the sacrificial layer can be set to 10000~100000cps, and the material type can be selected to be a glue that has no obvious similarity and miscibility with the reflective layer material, and the sacrificial layer material cannot be thermally cured. The material viscosity of the reflective layer can be set to 50~200cps, and the reflective layer needs to add a certain proportion of silicone leveling agent (>1.5%), and the reflective layer material can be thermally cured.

[0152] See also Figure 8 , Figure 8 A schematic structural diagram of a printing device for a backlight plate reflective layer provided in an embodiment of the present application is shown.

[0153] like Figure 8 As shown, the printing device of the backlight plate reflective layer may at least include a parameter processing module 801, a first printing module 802, a second printing module 803 and a cleaning processing module 804, wherein:

[0154] The parameter processing module 801 is used to obtain the specification parameters of the light-emitting diode on the backlight panel, and generate a first path according to the specification parameters of the light-emitting diode and a preset first calibration parameter;

[0155] The first printing module 802 is used to control the dispensing valve to perform a sacrificial layer printing process on all the light emitting diodes on the backlight panel according to the first path until each light emitting diode is wrapped by the sacrificial layer;

[0156] The second printing module 803 is used to determine at least two center points in the backlight panel excluding the area of ​​all light-emitting diodes based on the specification parameters of the light-emitting diodes, and control the jet valve to print the reflective layer on all the center points; wherein the height of the reflective layer is a preset height;

[0157] The cleaning module 804 is used to clean all sacrificial layers on the backlight panel.

[0158] In some possible embodiments, the device further includes:

[0159] Before obtaining the specification parameters of the LED on the backlight panel and generating the first path according to the specification parameters of the LED and the preset first calibration parameters, the vacuum plasma equipment is set based on the preset working parameters, and the set vacuum plasma equipment is controlled to pre-process the backlight panel.

[0160] In some possible embodiments, the device further includes:

[0161] Before generating the first path according to the specification parameters of the light-emitting diode and the preset first calibration parameters, the backlight plate is fixed on the suction cup, and at least two marking points on the backlight plate are identified based on the top vertical camera;

[0162] Determine whether the line formed by any two adjacent marking points is parallel to the calibration line; wherein the calibration line corresponds to the moving direction of the dispensing valve;

[0163] When it is detected that the line formed by any two adjacent marking points is not parallel to the calibration line, the suction cup is rotated based on the angle between the line formed by any two adjacent marking points and the calibration line until the line formed by any two adjacent marking points is parallel to the calibration line;

[0164] When it is detected that the line formed by any two adjacent marking points is parallel to the calibration line, the position of each marking point in the preset spatial rectangular coordinate system is determined, and the initial printing position is converted according to the position of at least one marking point, the position relationship of each light-emitting diode on the backlight plate, and the number of dispensing valves;

[0165] Generating a first path according to specification parameters of the light emitting diode and a preset first calibration parameter includes:

[0166] A first path is generated according to specification parameters of the light emitting diode, a preset first calibration parameter and an initial printing position.

[0167] In some possible embodiments, the first printing module is used to:

[0168] Controlling the laser distance measuring sensor to scan the surface of the backlight plate to obtain a first height between the laser distance measuring sensor and the backlight plate;

[0169] Calculate a second height between the dispensing valve and the backlight panel based on a preset first calibration parameter and the first height;

[0170] Generate a first initial moving path according to the second height and the initial printing position;

[0171] According to the arrangement of all light emitting diodes in the specification parameters of the light emitting diodes and the number of the glue dispensing valves, a glue dispensing movement path is generated, and the first initial movement path and the glue dispensing movement path are used as the first path.

[0172] In some possible embodiments, the first printing module is used to:

[0173] Determine a first printing volume according to the printing requirement parameters of the backlight plate, and perform a difference calculation between the first printing volume and the volume of the light emitting diode to obtain a second printing volume;

[0174] Determine, based on the second printing volume, the time required for the dispensing valve to print the sacrificial layer of each light-emitting diode under a preset pressure;

[0175] The dispensing valve is controlled to move to the initial printing position according to the first initial moving path, and the dispensing valve is controlled to perform sacrificial layer printing processing on all light emitting diodes according to the dispensing moving path and the time required to print the sacrificial layer of each light emitting diode.

[0176] In some possible embodiments, the device further includes:

[0177] The dispensing valve is controlled to move to the top of each marking point in turn, and according to the time required to print the sacrificial layer of each light-emitting diode, the dispensing valve is controlled to print the sacrificial layer for all marking points.

[0178] In some possible embodiments, the device further includes:

[0179] Generate a fence printing path according to the edge of the backlight panel;

[0180] The dispensing valve is controlled to perform sacrificial layer printing according to the enclosure printing path; wherein the enclosure height is greater than a preset height.

[0181] In some possible embodiments, the second printing module is used to:

[0182] Based on the arrangement of all the light emitting diodes in the specification parameters of the light emitting diodes, the backlight panel is divided into at least two areas; wherein the area of ​​each area is the same, the total number of light emitting diodes contained in each area is an even number, and the total number of light emitting diodes contained in each area is the same;

[0183] A central point of each region is determined in each region, and each central point of each region is used as at least two central points of a region in the backlight panel excluding all light emitting diodes.

[0184] In some possible embodiments, the second printing module is used to:

[0185] Calculating a third height between the injection valve and the backlight panel based on a preset second calibration parameter and the first height;

[0186] Generate a second initial moving path according to the third height and the positions of all center points in a preset spatial rectangular coordinate system;

[0187] Generate an injection movement path according to the positional relationship of all center points and the number of injection valves, and use the second initial movement path and the injection movement path as the second path;

[0188] The jet valve is controlled to follow the second path to perform reflective layer printing processing on all center points.

[0189] In some possible embodiments, the second printing module is used to:

[0190] Calculate a third printing volume according to the area of ​​the region and the preset height;

[0191] Determine, based on the third printing volume, the time required for the jet valve to jet the reflective layer at each center point under a preset pressure;

[0192] The jet valve is controlled to move according to the second initial movement path, and the jet valve is controlled to perform reflective layer printing processing on all center points according to the jet movement path and the time required to jet the reflective layer at each center point.

[0193] In some possible embodiments, the device further includes:

[0194] Performing static treatment on the backlight panel at preset time intervals;

[0195] The backlight panel after the static treatment is cured.

[0196] In some possible embodiments, the device further includes:

[0197] The cleaned backlight panel is dried.

[0198] 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.

[0199] See also Fig. 9 , Fig. 9 A schematic structural diagram of another printing device for a backlight plate reflective layer provided in an embodiment of the present application is shown.

[0200] like Fig. 9 As shown, the printing device 900 for the backlight plate reflective layer may include: at least one processor 901 , at least one network interface 904 , a user interface 903 , a memory 905 , and at least one communication bus 902 .

[0201] The communication bus 902 may be used to realize the connection and communication among the above-mentioned components.

[0202] The user interface 903 may include buttons, and the optional user interface may also include a standard wired interface or a wireless interface.

[0203] The network interface 904 may include, but is not limited to, a Bluetooth module, an NFC module, a Wi-Fi module, and the like.

[0204] Among them, the processor 901 may include one or more processing cores. The processor 901 uses various interfaces and lines to connect various parts in the printing device 900 of the backlight plate reflective layer, and executes various functions and processes data of the printing device 900 of the routing backlight plate reflective layer by running or executing instructions, programs, code sets or instruction sets stored in the memory 905, and calling data stored in the memory 905. Optionally, the processor 901 can be implemented in at least one hardware form of DSP, FPGA, and PLA. The processor 901 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 901, and it can be implemented by a single chip.

[0205] The memory 905 may include RAM or ROM. Optionally, the memory 905 includes a non-transitory computer-readable medium. The memory 905 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 905 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 various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 905 may optionally be at least one storage device located away from the aforementioned processor 901. As Fig. 9 As shown, the memory 905 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a printing application for the backlight reflective layer.

[0206] Specifically, the processor 901 may be used to call the printing application for the backlight plate reflective layer stored in the memory 905, and specifically perform the following operations:

[0207] Obtaining specification parameters of the light-emitting diode on the backlight panel, and generating a first path according to the specification parameters of the light-emitting diode and a preset first calibration parameter;

[0208] Controlling the dispensing valve to perform a sacrificial layer printing process on all the light emitting diodes on the backlight panel according to the first path until each light emitting diode is wrapped by the sacrificial layer;

[0209] Based on the specification parameters of the light-emitting diodes, at least two center points are determined in the backlight panel except for the area of ​​all the light-emitting diodes, and the jet valve is controlled to print the reflective layer on all the center points; wherein the height of the reflective layer is a preset height;

[0210] All sacrificial layers on the backlight panel are cleaned.

[0211] In some possible embodiments, before obtaining the specification parameters of the light emitting diodes on the backlight panel and generating the first path according to the specification parameters of the light emitting diodes and the preset first calibration parameters, the method further includes:

[0212] The vacuum plasma equipment is set based on preset working parameters, and the set vacuum plasma equipment is controlled to pre-process the backlight panel.

[0213] In some possible embodiments, before generating the first path according to the specification parameters of the light emitting diode and the preset first calibration parameters, the method further includes:

[0214] The backlight plate is fixed on the suction cup, and at least two marking points on the backlight plate are identified based on the top vertical camera;

[0215] Determine whether the line formed by any two adjacent marking points is parallel to the calibration line; wherein the calibration line corresponds to the moving direction of the dispensing valve;

[0216] When it is detected that the line formed by any two adjacent marking points is not parallel to the calibration line, the suction cup is rotated based on the angle between the line formed by any two adjacent marking points and the calibration line until the line formed by any two adjacent marking points is parallel to the calibration line;

[0217] When it is detected that the line formed by any two adjacent marking points is parallel to the calibration line, the position of each marking point in the preset spatial rectangular coordinate system is determined, and the initial printing position is converted according to the position of at least one marking point, the position relationship of each light-emitting diode on the backlight plate, and the number of dispensing valves;

[0218] Generating a first path according to specification parameters of the light emitting diode and a preset first calibration parameter includes:

[0219] A first path is generated according to specification parameters of the light emitting diode, a preset first calibration parameter and an initial printing position.

[0220] In some possible embodiments, generating a first path according to specification parameters of a light-emitting diode, a preset first calibration parameter, and an initial printing position includes:

[0221] Controlling the laser distance measuring sensor to scan the surface of the backlight plate to obtain a first height between the laser distance measuring sensor and the backlight plate;

[0222] Calculate a second height between the dispensing valve and the backlight panel based on a preset first calibration parameter and the first height;

[0223] Generate a first initial moving path according to the second height and the initial printing position;

[0224] According to the arrangement of all light emitting diodes in the specification parameters of the light emitting diodes and the number of the glue dispensing valves, a glue dispensing movement path is generated, and the first initial movement path and the glue dispensing movement path are used as the first path.

[0225] In some possible embodiments, controlling the dispensing valve to perform a sacrificial layer printing process on all light emitting diodes on the backlight panel according to the first path includes:

[0226] Determine a first printing volume according to the printing requirement parameters of the backlight plate, and perform a difference calculation between the first printing volume and the volume of the light emitting diode to obtain a second printing volume;

[0227] Determine, based on the second printing volume, the time required for the dispensing valve to print the sacrificial layer of each light-emitting diode under a preset pressure;

[0228] The dispensing valve is controlled to move to the initial printing position according to the first initial moving path, and the dispensing valve is controlled to perform sacrificial layer printing processing on all light emitting diodes according to the dispensing moving path and the time required to print the sacrificial layer of each light emitting diode.

[0229] In some possible embodiments, after controlling the dispensing valve to perform a sacrificial layer printing process on all light emitting diodes on the backlight panel according to the first path, and before determining at least two center points in an area of ​​the backlight panel excluding all light emitting diodes based on specification parameters of the light emitting diodes, the method further includes:

[0230] The dispensing valve is controlled to move to the top of each marking point in turn, and according to the time required to print the sacrificial layer of each light-emitting diode, the dispensing valve is controlled to print the sacrificial layer for all marking points.

[0231] In some possible embodiments, after controlling the dispensing valve to perform a sacrificial layer printing process on all light emitting diodes on the backlight panel according to the first path, and before determining at least two center points in an area of ​​the backlight panel excluding all light emitting diodes based on specification parameters of the light emitting diodes, the method further includes:

[0232] Generate a fence printing path according to the edge of the backlight panel;

[0233] The dispensing valve is controlled to perform sacrificial layer printing according to the enclosure printing path; wherein the enclosure height is greater than a preset height.

[0234] In some possible embodiments, based on the specification parameters of the light emitting diodes, at least two center points are determined in the area of ​​the backlight panel excluding all the light emitting diodes, including:

[0235] Based on the arrangement of all the light emitting diodes in the specification parameters of the light emitting diodes, the backlight panel is divided into at least two areas; wherein the area of ​​each area is the same, the total number of light emitting diodes contained in each area is an even number, and the total number of light emitting diodes contained in each area is the same;

[0236] A central point of each region is determined in each region, and each central point of each region is used as at least two central points of a region in the backlight panel excluding all light emitting diodes.

[0237] In some possible embodiments, controlling the jet valve to perform a reflective layer printing process on all center points includes:

[0238] Calculating a third height between the injection valve and the backlight panel based on a preset second calibration parameter and the first height;

[0239] Generate a second initial moving path according to the third height and the positions of all center points in a preset spatial rectangular coordinate system;

[0240] Generate an injection movement path according to the positional relationship of all center points and the number of injection valves, and use the second initial movement path and the injection movement path as the second path;

[0241] The jet valve is controlled to follow the second path to perform reflective layer printing processing on all center points.

[0242] In some possible embodiments, controlling the jet valve to perform reflective layer printing processing on all center points according to the second path includes:

[0243] Calculate a third printing volume according to the area of ​​the region and the preset height;

[0244] Determine, based on the third printing volume, the time required for the jet valve to jet the reflective layer at each center point under a preset pressure;

[0245] The jet valve is controlled to move according to the second initial movement path, and the jet valve is controlled to perform reflective layer printing processing on all center points according to the jet movement path and the time required to jet the reflective layer at each center point.

[0246] In some possible embodiments, after controlling the jet valve to print the reflective layer on all the center points and before cleaning all the sacrificial layers on the backlight plate, the method further includes:

[0247] Performing static treatment on the backlight panel at preset time intervals;

[0248] The backlight panel after the static treatment is cured.

[0249] In some possible embodiments, after all sacrificial layers on the backlight plate are cleaned, the method further includes:

[0250] The cleaned backlight panel is dried.

[0251] 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.

[0252] 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.

[0253] 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.

[0254] 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 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.

[0255] 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.

[0256] 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.

[0257] 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 various embodiments 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.

[0258] 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.

[0259] The above are only exemplary embodiments of the present disclosure and cannot be used to limit the scope of the present disclosure. 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 that are not recorded in the present disclosure. The description and examples are only regarded as exemplary, and the scope and spirit of the present disclosure are defined by the claims.

Claims

1. A method for printing a backlight plate reflective layer, characterized in that: include: Acquire specification parameters of a light emitting diode on the backlight panel, and generate a first path according to the specification parameters of the light emitting diode and a preset first calibration parameter; Controlling the dispensing valve to perform a sacrificial layer printing process on all the light emitting diodes on the backlight panel according to the first path until each of the light emitting diodes is wrapped by the sacrificial layer; Based on the specification parameters of the light-emitting diodes, at least two center points are determined in the backlight panel except for the area of ​​all the light-emitting diodes, and the jet valve is controlled to perform reflective layer printing processing on all the center points; wherein the height of the reflective layer is a preset height; Cleaning all the sacrificial layers on the backlight panel; Wherein, before generating the first path according to the specification parameters of the light emitting diode and the preset first calibration parameters, it also includes: Fixing the backlight panel on the suction cup, and identifying at least two marking points on the backlight panel based on a top vertical camera; It is determined whether a line formed by any two adjacent marking points is parallel to a calibration line to determine whether the backlight panel is rotating; wherein the calibration line corresponds to the moving direction of the dispensing valve.

2. The method according to claim 1, characterized in that Before obtaining the specification parameters of the light emitting diodes on the backlight panel and generating the first path according to the specification parameters of the light emitting diodes and the preset first calibration parameters, the method further includes: The vacuum plasma equipment is set based on preset working parameters, and the vacuum plasma equipment after the setting is controlled to pre-process the backlight panel.

3. The method according to claim 1, characterized in that Before generating the first path according to the specification parameters of the light emitting diode and the preset first calibration parameters, the method further includes: When it is detected that the line formed by any two adjacent marking points is not parallel to the calibration line, based on the angle between the line formed by any two adjacent marking points and the calibration line, the suction cup is rotated until the line formed by any two adjacent marking points is parallel to the calibration line; When it is detected that the line formed by any two adjacent marking points is parallel to the calibration line, the position of each marking point in the preset spatial rectangular coordinate system is determined, and the initial printing position is converted according to the position of any at least one marking point, the positional relationship of each light-emitting diode on the backlight panel, and the number of the dispensing valves; The step of generating a first path according to the specification parameters of the light emitting diode and a preset first calibration parameter includes: A first path is generated according to the specification parameters of the light emitting diode, the preset first calibration parameters and the initial printing position.

4. The method according to claim 3, characterized in that The step of generating a first path according to the specification parameters of the light emitting diode, the preset first calibration parameters and the initial printing position includes: Controlling the laser ranging sensor to scan the surface of the backlight plate to obtain a first height between the laser ranging sensor and the backlight plate; Calculating a second height between the dispensing valve and the backlight panel based on the preset first calibration parameter and the first height; generating a first initial moving path according to the second height and the initial printing position; A dispensing movement path is generated according to the arrangement order of all the light-emitting diodes in the specification parameters of the light-emitting diodes and the number of the dispensing valves, and the first initial movement path and the dispensing movement path are used as the first path.

5. The method according to claim 4, characterized in that The controlling the dispensing valve to perform a sacrificial layer printing process on all the light emitting diodes on the backlight panel according to the first path includes: Determining a first printing volume according to the printing requirement parameters of the backlight plate, and performing a difference calculation between the first printing volume and the volume of the light-emitting diode to obtain a second printing volume; Determining, based on the second printing volume, the time required for the dispensing valve to print the sacrificial layer of each light-emitting diode under a preset pressure; The dispensing valve is controlled to move to the initial printing position according to the first initial moving path, and the dispensing valve is controlled to perform sacrificial layer printing processing on all the light-emitting diodes according to the dispensing moving path and the time required for printing the sacrificial layer of each light-emitting diode.

6. The method according to claim 5, characterized in that After the controlling dispensing valve performs a sacrificial layer printing process on all the light emitting diodes on the backlight panel according to the first path, and before determining at least two center points in the area of ​​the backlight panel excluding all the light emitting diodes based on the specification parameters of the light emitting diodes, the method further includes: The dispensing valve is controlled to move to the top of each of the marking points in sequence, and according to the time required for printing the sacrificial layer of each light-emitting diode, the dispensing valve is controlled to print the sacrificial layer for all the marking points.

7. The method according to claim 5 or 6, characterized in that: After the controlling dispensing valve performs a sacrificial layer printing process on all the light emitting diodes on the backlight panel according to the first path, and before determining at least two center points in the area of ​​the backlight panel excluding all the light emitting diodes based on the specification parameters of the light emitting diodes, the method further includes: Generate a fence printing path according to the edge of the backlight panel; The dispensing valve is controlled to perform sacrificial layer printing processing according to the enclosure printing path; wherein the enclosure height is greater than the preset height.

8. The method according to claim 4, characterized in that The method of determining at least two center points in the backlight panel excluding the area of ​​all the light emitting diodes based on the specification parameters of the light emitting diodes includes: Based on the arrangement of all the light-emitting diodes in the specification parameters of the light-emitting diodes, the backlight panel is divided into at least two areas; wherein the area of ​​each of the areas is the same, the total number of the light-emitting diodes contained in each of the areas is an even number, and the total number of the light-emitting diodes contained in each of the areas is the same; A center point of each region is determined in each region, and each center point of the region is used as at least two center points of a region in the backlight panel excluding all the light emitting diodes.

9. The method according to claim 8, characterized in that The controlling the jet valve to perform a reflective layer printing process on all the central points includes: Calculating a third height between the injection valve and the backlight panel based on a preset second calibration parameter and the first height; Generate a second initial moving path according to the third height and the positions of all the center points in the preset spatial rectangular coordinate system; generating an injection movement path according to the positional relationship of all the center points and the number of the injection valves, and using the second initial movement path and the injection movement path as a second path; The injection valve is controlled to perform reflective layer printing processing on all the central points according to the second path.

10. The method according to claim 9, characterized in that The controlling the jet valve to perform reflective layer printing processing on all the center points according to the second path includes: Calculating a third printing volume according to the area of ​​the region and the preset height; Determining, based on the third printing volume, the time required for the jet valve to jet the reflective layer at each of the central points under the preset pressure; The injection valve is controlled to move according to the second initial movement path, and the injection valve is controlled to perform reflective layer printing processing on all the center points according to the injection movement path and the time required to inject the reflective layer at each center point.

11. The method according to claim 1, characterized in that: After the control of the jet valve to print the reflective layer on all the central points and before the cleaning of all the sacrificial layers on the backlight plate, the method further includes: Performing a static treatment on the backlight panel at a preset time interval; The backlight panel after the static treatment is cured.

12. The method according to claim 1, characterized in that After the cleaning process is performed on all the sacrificial layers on the backlight panel, the method further comprises: The backlight panel after the cleaning process is dried.

13. A printing device for a backlight plate reflective layer, characterized in that: include: A parameter processing module, used for acquiring specification parameters of the light emitting diode on the backlight panel, and generating a first path according to the specification parameters of the light emitting diode and a preset first calibration parameter; A first printing module, used for controlling a dispensing valve to perform a sacrificial layer printing process on all the light emitting diodes on the backlight panel according to the first path, until each of the light emitting diodes is wrapped by the sacrificial layer; A second printing module is used to determine at least two center points in the backlight panel excluding the area of ​​all the light-emitting diodes based on the specification parameters of the light-emitting diodes, and control the jet valve to print the reflective layer on all the center points; wherein the height of the reflective layer is a preset height; A cleaning module, used for cleaning all the sacrificial layers on the backlight panel; Wherein, before generating the first path according to the specification parameters of the light emitting diode and the preset first calibration parameters, it also includes: Fixing the backlight panel on the suction cup, and identifying at least two marking points on the backlight panel based on a top vertical camera; It is determined whether a line formed by any two adjacent marking points is parallel to a calibration line to determine whether the backlight panel is rotating; wherein the calibration line corresponds to the moving direction of the dispensing valve.

14. A printing device for a backlight plate reflective layer, characterized in that: including a processor and a memory; 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 12.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a computer or a processor, the computer or the processor executes the steps of the method according to any one of claims 1 to 12.

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