Electrostatic field high-precision array point contactless dispensing device and method

Abstract

The present invention discloses a non-contact dispensing device and method for an electrostatic field high-precision array point. The dispensing device includes a controller, a distance sensor, a pulse signal generator, a transformer, and a dispensing device; the dispensing device includes a dispensing needle; the input end of the transformer is electrically connected to the output end of the pulse signal generator; the controller is respectively communicatively connected to the distance sensor, the pulse signal generator, and the transformer, and is used to determine the distance information between the dispensing needle and the area to be printed on the substrate to be printed based on the detection information of the distance sensor, and adjust the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer based on the distance information to control the electric field between the dispensing needle and the area to be printed. The present invention reduces the impact of the flatness of the area to be printed on the dispensing consistency by setting the controller to adjust the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer based on the distance information.

Description

Technical Field

[0001] The present invention relates to the field of glue dispensing technology, and in particular to an electrostatic field high-precision array point contactless glue dispensing device and method. Background Art

[0002] Contactless dispensing technology is a dispensing method that does not require the dispensing needle to come into direct contact with the substrate to be printed. Contactless dispensing technology is gradually becoming the preferred dispensing technology in fields such as electronic integration, semiconductor packaging, and flat panel display integration.

[0003] The currently commonly used contactless dispensing technology achieves dispensing by controlling the electric field between the dispensing needle and the substrate to be printed.

[0004] However, the above-mentioned contactless dispensing technology has the following problems: 1. The area to be printed of the existing substrate to be printed, that is, the surface of the substrate to be printed close to the dispensing needle, is uneven. The distances between the multiple sub-areas to be printed on the area to be printed and the dispensing needle are different, which will affect the consistency of dispensing in the sub-areas to be printed. 2. Some sub-areas to be printed on the substrate to be printed may have defects, such as cracks. Since the above-mentioned contactless dispensing technology lacks detection of defects on the sub-areas to be printed, it may happen that the defects are mistakenly dispensed. 3. Some substrates to be printed will be provided with some through holes, and there will be some sub-areas to be printed around the through holes that need to be dispensed. It is inevitable that there will be errors in the production of the through holes on the substrate to be printed. The errors will affect the sub-areas to be printed around them, and since the dispensing accuracy of the existing contactless dispensing technology is insufficient, some droplets may enter the through holes when dispensing the sub-areas to be printed around the through holes. 4. Some substrates to be printed are three-dimensional and multi-layered. The distance between the to-be-printed area and the dispensing component of each layer is different. To ensure that the dispensing of the to-be-printed areas of different layers is consistent, it is usually necessary to perform dispensing in multiple times according to the number of layers of the to-be-printed area, resulting in low dispensing efficiency. 5. When implementing array dispensing of flat substrates to be printed or three-dimensional multi-layered substrates to be printed, existing contactless dispensing technology needs to control the movement of the substrate to be printed or the dispensing needle in the Z direction to reduce the impact of the difference in distance information between each to-be-printed sub-area of ​​the to-be-printed area on the substrate to be printed and the dispensing needle on the dispensing consistency. This control method is complex and the dispensing efficiency is low. The Z direction refers to the direction perpendicular to the substrate to be printed. Summary of the Invention

[0005] The present invention provides an electrostatic field high-precision array point non-contact dispensing device and method to solve the problems of poor dispensing consistency in each sub-area to be printed, low dispensing accuracy in the sub-area to be printed around the through-hole, and low dispensing efficiency in the existing non-contact dispensing technology.

[0006] In a first aspect, an embodiment of the present invention provides an electrostatic field high-precision array point non-contact glue dispensing device, the electrostatic field high-precision array point non-contact glue dispensing device includes a controller, a distance measuring sensor, a pulse signal generator, a transformer and a glue dispenser;

[0007] The glue dispenser includes a glue dispensing needle;

[0008] The input end of the transformer is electrically connected to the output end of the pulse signal generator;

[0009] The controller is communicatively connected to the distance sensor, the pulse signal generator and the transformer respectively, and is used to determine the distance information between the dispensing needle and the to-be-printed area on the to-be-printed substrate based on the detection information of the distance sensor, and adjust the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer based on the distance information to control the electric field between the dispensing needle and the to-be-printed area.

[0010] Optionally, the pulse signal generator includes a first output terminal; the transformer includes a first transformer; the pulse signal includes a first pulse signal;

[0011] The first transformer is connected in series between the first output end and the dispensing needle, and is used to perform voltage transformation and regulation on the first pulse signal output from the first output end and transmit the signal to the dispensing needle;

[0012] The substrate to be printed is grounded.

[0013] Optionally, the pulse signal generator includes a second output terminal; the transformer includes a second transformer; and the pulse signal includes a second pulse signal.

[0014] The second transformer is connected in series between the second output terminal and the substrate to be printed, and is used to transform and regulate the second pulse signal output from the second output terminal and transmit the second pulse signal to the substrate to be printed;

[0015] The dispensing needle is grounded.

[0016] Optionally, the pulse signal generator includes a first output terminal and a second output terminal; the transformer includes a first transformer and a second transformer; the pulse signal includes a first pulse signal and a second pulse signal;

[0017] The first transformer is connected in series between the first output end and the dispensing needle, and is used to perform voltage transformation and regulation on the first pulse signal output from the first output end and transmit the signal to the dispensing needle;

[0018] The second transformer is connected in series between the second output terminal and the substrate to be printed, and is used to transform and regulate the second pulse signal output from the second output terminal and transmit the second pulse signal to the substrate to be printed;

[0019] In the dispensing state, the first pulse signal and the second pulse signal have opposite polarities;

[0020] In a non-dispensing state, the first pulse signal and the second pulse signal have the same polarity.

[0021] Optionally, the electrostatic field high-precision array point contactless dispensing device further includes a negative pressure machine, which is connected to the dispensing needle;

[0022] The controller is also electrically connected to the negative pressure machine and is used to control the working state of the negative pressure machine according to the state of the dispensing needle;

[0023] In the dispensing state, the controller controls the negative pressure machine to stop working, and the negative pressure machine stops providing negative pressure to the dispensing needle;

[0024] In a non-dispensing state, the controller controls the negative pressure machine to start working, and the negative pressure machine provides negative pressure for the dispensing needle.

[0025] In a second aspect, an embodiment of the present invention provides an electrostatic field high-precision array point non-contact dispensing method, which is applied to the electrostatic field high-precision array point non-contact dispensing device described in the first aspect. The electrostatic field high-precision array point non-contact dispensing method includes:

[0026] Determining the distance between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor;

[0027] The pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer are adjusted according to the distance information to control the electric field between the dispensing needle and the area to be printed.

[0028] Optionally, the area to be printed includes at least two sub-areas to be printed, and each sub-area to be printed includes at least two dots to be printed;

[0029] Determining the distance information between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor includes:

[0030] Determine the average distance information between the dispensing needle and the sub-area to be printed according to the detection information of each of the to-be-printed points detected by the distance measuring sensor;

[0031] Adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information includes:

[0032] The average pulse signal output by the pulse signal generator and / or the average adjustment multiple of the transformer are adjusted according to the average distance information.

[0033] Optionally, the sub-area to be printed includes a first dot to be printed, a second dot to be printed, a third dot to be printed, a fourth dot to be printed, and a fifth dot to be printed, wherein the first dot to be printed, the second dot to be printed, the third dot to be printed, and the fourth dot to be printed are located at the edge of the sub-area to be printed, and the fifth dot to be printed is located in an area surrounded by the first dot to be printed, the second dot to be printed, the third dot to be printed, and the fourth dot to be printed;

[0034] Determining average distance information between the dispensing needle and the sub-area to be printed according to detection information of each to-be-printed point detected by the distance measuring sensor, including:

[0035] receiving first distance information between the dispensing needle and the first point to be printed, second distance information between the dispensing needle and the second point to be printed, third distance information between the dispensing needle and the third point to be printed, fourth distance information between the dispensing needle and the fourth point to be printed, and fifth distance information between the dispensing needle and the fifth point to be printed, detected by the distance measuring sensor;

[0036] The average distance information between the dispensing needle and the sub-area to be printed is determined according to the first distance information, the second distance information, the third distance information, the fourth distance information and the fifth distance information.

[0037] Optionally, the area to be printed includes at least two sub-areas to be printed;

[0038] Determining the distance information between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor includes:

[0039] Determine the distance information between the dispensing needle and the current sub-area to be printed according to the detection information of the current sub-area to be printed detected by the distance measuring sensor;

[0040] Adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information includes:

[0041] Adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information between the dispensing needle and the current sub-area to be printed;

[0042] After adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information between the dispensing needle and the current sub-area to be printed, the electrostatic field high-precision array point non-contact dispensing method further includes:

[0043] Determine the distance information between the dispensing needle and the next sub-area to be printed according to the detection information of the next sub-area to be printed detected by the distance measuring sensor;

[0044] The pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer are adjusted according to the distance information between the dispensing needle and the next sub-area to be printed.

[0045] Optionally, before receiving the distance information between the dispensing needle and the to-be-printed area detected by the distance measuring sensor, the electrostatic field high-precision array point non-contact dispensing method further includes:

[0046] Determining the initial pulse signal output by the pulse signal generator and the initial adjustment multiple of the transformer according to a preset glue dot shape, a preset distance between the glue dispensing needle and the substrate to be printed, and the viscosity of the liquid drop in the glue dispenser;

[0047] Adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information includes:

[0048] The initial pulse signal and / or the initial adjustment factor are adjusted according to the distance information.

[0049] The technical solution of the embodiment of the present invention is to set a controller to adjust the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information between the dispensing needle and the area to be printed on the substrate to be printed, thereby controlling the electric field between the dispensing needle and the area to be printed. The electric field between the dispensing needle and the area to be printed can change with the change of distance information. Different distance information corresponds to different electric fields, and under different electric fields, the size of the droplets sprayed by the dispensing needle is also different. In this way, the size of the droplets sprayed by the dispensing needle can change with the change of distance information, which is beneficial to reducing the influence of the difference in distance information between each sub-area to be printed in the area to be printed on the substrate to be printed and the dispensing needle on the dispensing consistency, thereby improving the accuracy of dispensing. It is understandable that the controller can determine whether there are through holes or defects in the area to be printed based on the distance information between the dispensing needle and the area to be printed on the substrate to be printed, and then control the dispensing needle to not dispense glue on the through holes or defects in the area to be printed by adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer. In this way, the situation of mistakenly dispensing glue on through holes or defects can be avoided. It is understandable that for a three-dimensional multi-layer substrate to be printed, the controller can also adjust the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer based on the distance information between the area to be printed on each layer and the dispensing needle to keep the droplets sprayed by the dispensing needle in the areas to be printed on different layers consistent, without the need to dispense glue multiple times according to the number of layers of the area to be printed, which is conducive to improving the dispensing efficiency. By setting a controller that can adjust the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information between the dispensing needle and the area to be printed on the substrate to be printed, the influence of the difference in distance information between each sub-area to be printed in the area to be printed on the substrate to be printed and the dispensing needle on the dispensing consistency is reduced. There is no need to control the movement of the substrate to be printed or the dispensing needle along the Z direction. It is only necessary to control the movement of the substrate to be printed along the direction of the plane in which it is located. The motion control is simple, which is conducive to improving the dispensing efficiency. Since the dispensing needle does not need to move, the deviation of the droplets sprayed by the dispensing needle due to its high-response acceleration and deceleration movement up and down is avoided, which makes it difficult to control the accuracy of the droplet size, which is conducive to improving the accuracy of dispensing.

[0050] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0052] Figure 1 A schematic structural diagram of an electrostatic field high-precision array point contactless dispensing device provided by an embodiment of the present invention;

[0053] Figure 2 A schematic structural diagram of a substrate to be printed provided by an embodiment of the present invention;

[0054] Figure 3 A schematic structural diagram of another substrate to be printed provided by an embodiment of the present invention;

[0055] Figure 4 A schematic structural diagram of another substrate to be printed provided by an embodiment of the present invention;

[0056] Figure 5 A schematic structural diagram of another substrate to be printed provided by an embodiment of the present invention;

[0057] Figure 6 A schematic structural diagram of another electrostatic field high-precision array point contactless dispensing device provided by an embodiment of the present invention;

[0058] Figure 7 A schematic structural diagram of another electrostatic field high-precision array point contactless dispensing device provided by an embodiment of the present invention;

[0059] Figure 8 A schematic structural diagram of another electrostatic field high-precision array point contactless dispensing device provided by an embodiment of the present invention;

[0060] Figure 9 A flow chart of a high-precision, non-contact dispensing method for an electrostatic field array provided by an embodiment of the present invention;

[0061] Figure 10 A flow chart of another electrostatic field high-precision array point non-contact dispensing method provided by an embodiment of the present invention;

[0062] Figure 11 A flow chart of another electrostatic field high-precision array point contactless dispensing method provided by an embodiment of the present invention;

[0063] Figure 12 A flow chart of another electrostatic field high-precision array point contactless dispensing method provided by an embodiment of the present invention;

[0064] Figure 13A flow chart of another electrostatic field high-precision array point contactless dispensing method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0065] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0066] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way are interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices. The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation directions of the various components or components.

[0067] Example 1

[0068] Figure 1 A schematic diagram of the structure of a high-precision electrostatic field array point contactless dispensing device provided by an embodiment of the present invention is provided. Figure 2 A schematic structural diagram of a substrate to be printed provided by an embodiment of the present invention, with reference to Figure 1 and Figure 2The electrostatic field high-precision array point contactless dispensing device in the embodiment of the present invention includes a controller 10, a distance sensor 20, a pulse signal generator 30, a transformer 40 and a dispenser 50. The dispenser 50 includes a dispensing needle 51. The input end of the transformer 40 is electrically connected to the output end of the pulse signal generator 30. The controller 10 is respectively connected to the distance sensor 20, the pulse signal generator 30 and the transformer 40 for communication, and is used to determine the distance information between the dispensing needle 51 and the to-be-printed area 61 on the to-be-printed substrate 60 according to the detection information of the distance sensor 20, and adjust the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 according to the distance information to control the electric field between the dispensing needle 51 and the to-be-printed area 61.

[0069] Exemplarily, the controller 10 is communicatively connected to the pulse signal generator 30 and the transformer 40. The controller 10 can control the pulse signal output by the pulse signal generator 30 and the adjustment factor of the transformer 40 according to printing requirements. The input end of the transformer 40 is electrically connected to the output end of the pulse signal generator 30, and the transformer 40 can transform and adjust the pulse signal output by the pulse signal generator 30 according to the adjustment factor. It should be noted that the above-mentioned printing requirements may include at least one of a predetermined glue dot shape, a predetermined distance between the dispensing needle and the substrate to be printed, and the viscosity of the droplet in the dispenser.

[0070] Continue to refer Figure 1 and Figure 2 In the embodiment of the present invention, the purpose of controlling the electric field between the dispensing needle 51 and the area to be printed 61 is achieved by applying the pulse signal after voltage adjustment by the transformer 40 to the dispensing needle 51 and / or the area to be printed 61 on the substrate to be printed 60, thereby realizing the control of the dispensing of the dispensing device 50.

[0071] Specifically, when the polarity of the signal on the dispensing needle 51 is opposite to that of the signal on the area to be printed 61, that is, when an electric field exists between the dispensing needle 51 and the area to be printed 61, the droplets in the dispensing needle 51 are affected by the electric field force and can be sprayed onto the area to be printed 61. When the polarity of the signal on the dispensing needle 51 is the same as that of the signal on the area to be printed 61, that is, when no electric field exists between the dispensing needle 51 and the area to be printed 61, the droplets in the dispensing needle 51 stop being sprayed onto the area to be printed 61.

[0072] refer to Figure 2It is understood that the to-be-printed area 61 on the substrate 60 to be printed, i.e., the surface of the substrate 60 to be printed on the side close to the dispensing needle 51, may be uneven, and the distance information between the multiple to-be-printed sub-areas 611 of the to-be-printed area 61 and the dispensing needle 51 may vary. It is understood that, when the pulse signal acting on the dispensing needle 51 and / or the to-be-printed area 61 on the substrate 60 to be printed remains unchanged, the greater the distance information between the dispensing needle 51 and the to-be-printed sub-area 611, the smaller the electric field between the dispensing needle 51 and the to-be-printed sub-area 611, and the smaller the droplets ejected by the dispensing needle 51 onto the to-be-printed sub-area 611.

[0073] In order to reduce the influence of the flatness of the to-be-printed area 61 on the to-be-printed substrate 60 on the dispensing consistency of the to-be-printed sub-area 611, the embodiment of the present invention is provided with a distance sensor 20 that is communicatively connected to the controller 10. The distance sensor 20 can transmit the detected detection information to the controller 10. The distance sensor 20 can be fixed on the dispensing needle 51. The detection information detected by the distance sensor 20 can be the distance between the dispensing needle 51 and one or more to-be-printed points on the to-be-printed sub-area 611 ( Figure 2 The controller 10 can determine the distance information between the dispensing needle 51 and the sub-area to be printed 611 based on the received detection information, and adjust the pulse signal output by the pulse signal generator 30 and / or the adjustment factor of the transformer 40 based on this distance information to ensure that the size of the droplets sprayed by the dispensing needle 51 onto the sub-area to be printed 611 is substantially consistent. For example, when the distance information between the dispensing needle 51 and the sub-area to be printed 611 is large, the controller 10 can increase the electric field between the dispensing needle 51 and the substrate to be printed 60 by increasing the amplitude of the pulse signal output by the pulse signal generator 30 and / or the adjustment factor of the transformer 40, thereby increasing the size of the droplets sprayed by the dispensing needle 51 onto the sub-area to be printed 611. Alternatively, when the distance information between the dispensing needle 51 and the substrate to be printed 60 is large, the controller 10 can increase the electric field between the dispensing needle 51 and the substrate to be printed 60 by adjusting the period of the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40, thereby increasing the size of the droplets sprayed by the dispensing needle 51 onto the sub-area to be printed 611.

[0074] refer to Figure 2 , Figure 2The illustrated substrate 60 to be printed is a single-layered substrate, comprising only one print area 61. This print area 61 refers to the surface of the substrate 60 near the dispensing needle 51. The print area 61 comprises six sub-areas 611 arranged in a 2×3 array, each of which is a raised area. Ideally, the distances between the six sub-areas 611 on the substrate 60 and the dispensing needle 51 are identical. However, given manufacturing tolerances for the substrate 60, it is understood that the distances between the six sub-areas 611 and the dispensing needle 51 may vary, and some sub-areas 611 may even be unqualified. An unqualified sub-area 611 is one whose distance from the dispensing needle 51 exceeds a first predetermined range, while a qualified sub-area 611 is one whose distance from the dispensing needle 51 does not exceed the first predetermined range.

[0075] To ensure that the size of the droplets sprayed by the dispensing needle 51 onto the qualified sub-area to be printed 611 can be kept consistent, and to avoid dispensing on the unqualified sub-area to be printed 611. In the embodiment of the present invention, the controller 10 can also be configured to judge whether the sub-area to be printed 611 is qualified based on the distance information between the area to be printed of each layer and the dispensing needle. For the qualified sub-area to be printed 611, that is, the sub-area to be printed 611 whose distance information with the dispensing needle 51 does not exceed the first preset range, the controller 10 can adjust the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 based on the distance information between the sub-area to be printed 611 and the dispensing needle 51 to make the droplets sprayed by the dispensing needle 51 on each qualified sub-area to be printed 611 consistent. The specific adjustment logic can be referred to the above description and will not be repeated here.

[0076] For unqualified sub-areas to be printed 611, i.e., sub-areas to be printed 611 whose distance information from the dispensing needle 51 does not exceed the first preset range, the controller 10 can control the dispensing needle 51 to not dispense glue on the unqualified sub-areas to be printed 611 by adjusting the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40. For example, when the distance information between the dispensing needle 51 and the sub-area to be printed 611 exceeds the first preset range, the controller 10 can reduce the electric field between the dispensing needle 51 and the substrate to be printed 60 by lowering the amplitude of the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40, thereby preventing the liquid droplets in the dispensing needle 51 from being sprayed onto the sub-area to be printed 611. Alternatively, when the distance information between the dispensing needle 51 and the sub-area to be printed 611 exceeds a first preset range, the controller 10 can reduce the electric field between the dispensing needle 51 and the substrate to be printed 60 by shortening the period of the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40, thereby preventing the droplets in the dispensing needle 51 from being sprayed onto the sub-area to be printed 611.

[0077] It should be noted that the embodiment of the present invention does not specifically limit the first preset range, and those skilled in the art can set it according to actual conditions.

[0078] Figure 3 A schematic diagram of another substrate to be printed provided in an embodiment of the present invention, referring to Figure 3 , Figure 3 The substrate to be printed 60 shown is also single-layer and also includes only one area to be printed 61. The area to be printed 61 refers to the surface of the substrate to be printed 60 close to the dispensing needle 51. The area to be printed 61 includes 6 sub-areas to be printed 611 arranged in a 2×3 array, and the sub-areas to be printed 611 are grooves. Figure 3 The embodiment shown is Figure 2 The difference of the embodiment shown is the specific structure of the sub-area to be printed 611 and the preset range based on which the qualification of the sub-area to be printed 611 is determined. The pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 are adjusted according to the distance information between the sub-area to be printed 611 and the dispensing needle 51. Figure 2 The embodiments shown are similar, and reference may be made to the above description, which will not be repeated here.

[0079] Figure 4 A schematic structural diagram of another substrate to be printed provided in an embodiment of the present invention, referring to Figure 4 , Figure 4The substrate 60 to be printed is multi-layered and includes three areas to be printed 61 (61A, 61B, and 61C). The area to be printed 61A includes two sub-areas to be printed 611A arranged in a 2×1 array, the area to be printed 61B includes two sub-areas to be printed 611B arranged in a 2×1 array, and the area to be printed 61C includes two sub-areas to be printed 611C arranged in a 2×1 array. Each of the above sub-areas to be printed 611 (611A, 611B, and 611C) is a protrusion. Figure 4 The embodiment shown is Figure 2 The difference of the embodiment shown is the number and position of the to-be-printed area 61 and the preset range based on which the to-be-printed sub-area 611 on each to-be-printed area 61 is judged to be qualified. The pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 are adjusted according to the distance information between the to-be-printed sub-area 611 and the dispensing needle 51. Figure 2 The embodiments shown are similar, and reference may be made to the above description, which will not be repeated here.

[0080] Figure 5 A schematic structural diagram of another substrate to be printed provided in an embodiment of the present invention, referring to Figure 5 , Figure 5 The illustrated substrate 60 to be printed is a single layer, comprising a to-be-printed area 61 and three irregular through-holes 62. The to-be-printed area 61 includes a plurality of to-be-printed sub-areas 611 arranged in an array. Each of the to-be-printed sub-areas 611 may be a protrusion or a groove. The controller 10 in this embodiment of the present invention can determine the position of the through-hole 62 in the to-be-printed area 61 based on the distance between the dispensing needle 51 and the to-be-printed area 61 on the substrate 60 to be printed. The controller 10 can then control the dispensing needle 51 to prevent droplets from being sprayed into the through-hole 62 by lowering the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40. This prevents the dispensing of glue into the through-hole 62 by mistake.

[0081] It should be noted that the embodiment of the present invention does not limit the structure, number and arrangement of the to-be-printed sub-areas 611 included in the to-be-printed area 61, and those skilled in the art can configure them according to actual needs.

[0082] The technical solution of the embodiment of the present invention is to set a controller 10 to adjust the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 according to the distance information between the dispensing needle 51 and the area to be printed 61 on the substrate to be printed 60, thereby controlling the electric field between the dispensing needle 51 and the area to be printed 61, so that the electric field between the dispensing needle 51 and the area to be printed 61 can change with the change of distance information. Different distance information corresponds to different electric fields, and under different electric fields, the size of the droplets sprayed by the dispensing needle 51 is also different. In this way, the size of the droplets sprayed by the dispensing needle 51 can change with the change of distance information, which is beneficial to reducing the influence of the difference in distance information between each sub-area to be printed 611 of the area to be printed 61 on the substrate to be printed 60 and the dispensing needle 51 on the dispensing consistency, thereby improving the accuracy of dispensing. By setting up the controller 10, it is possible to determine whether there is a through hole 62 or defect in the area to be printed 61 based on the determined distance information, and then control the glue needle 51 to not dispense glue on the through hole 62 or defect in the area to be printed 61 by adjusting the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40. In this way, the situation of mistakenly dispensing glue on the through hole 62 or defect can be avoided. Moreover, for a three-dimensional multi-layer substrate 60 to be printed, the controller 10 can also adjust the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 based on the distance information between each layer of the area to be printed 61 and the glue needle 51 to ensure that the droplets sprayed by the glue needle 51 on the different layers of the area to be printed 61 are consistent, eliminating the need to dispense glue multiple times according to the number of layers of the area to be printed 61, which is beneficial to improving the glue dispensing efficiency. By setting a technical solution in which the controller 10 is capable of adjusting the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 according to the distance information between the dispensing needle 51 and the area to be printed 61 on the substrate to be printed 60, the influence of the difference in distance information between each sub-area to be printed 611 of the area to be printed 61 on the substrate to be printed 60 and the dispensing needle 51 on the dispensing consistency is reduced. There is no need to control the movement of the substrate to be printed 60 or the dispensing needle 51 along the Z direction. It is only necessary to control the movement of the substrate to be printed 60 along the direction of the plane in which it is located. The motion control is simple, which is conducive to improving the dispensing efficiency. Since the dispensing needle 51 does not need to move, the droplets sprayed by the dispensing needle 51 are avoided from being offset due to its high response acceleration and deceleration movement up and down, which makes it difficult to control the accuracy of the droplet size, which is conducive to improving the accuracy of dispensing.

[0083] As a feasible implementation method, refer to Figure 1The pulse signal generator 30 includes a first output terminal 31, the transformer 40 includes a first transformer 41, and the pulse signal includes a first pulse signal. The first transformer 41 is connected in series between the first output terminal 31 and the dispensing needle 51, and is used to transform and regulate the first pulse signal output from the first output terminal 31 and transmit it to the dispensing needle 51. The substrate 60 to be printed is grounded.

[0084] It can be understood that the first pulse signal includes alternating high-level signals and low-level signals. The first transformer 41 is connected between the dispensing needle 51 and the first output terminal 31 of the pulse signal generator 30. The first pulse signal output from the first output terminal 31 of the pulse signal generator 30 can be voltage-transformed and regulated, that is, the high-level signal and the low-level signal of the first pulse signal can be amplified or reduced. The first pulse signal after voltage transformation and regulation still includes alternating high-level signals and low-level signals. When the signal received by the dispensing needle 51 is a high-level signal (voltage greater than zero) in the first pulse signal, the droplets in the dispensing needle 51 are positively charged. Since the substrate 60 to be printed is grounded (voltage equal to zero), the surface of the substrate 60 to be printed close to the dispensing needle 51 is negatively charged. At this time, an electric field exists between the dispensing needle 51 and the substrate 60 to be printed. Under the action of the electric field between the dispensing needle 51 and the substrate 60 to be printed, the positively charged droplets will move toward the substrate 60 to be printed, that is, the dispensing needle 51 sprays droplets onto the substrate 60 to be printed to perform dispensing.

[0085] When the signal received by the dispensing needle 51 is a low-level signal (voltage equal to or less than zero) in the first pulse signal, the droplets in the dispensing needle 51 are negatively charged. Since the substrate 60 to be printed is grounded (voltage equal to zero), the surface of the substrate 60 to be printed close to the dispensing needle 51 is also negatively charged. At this time, there is no electric field between the dispensing needle 51 and the substrate 60 to be printed, and the negatively charged droplets will not move toward the substrate 60 to be printed. The dispensing needle 51 stops spraying droplets onto the substrate 60 to be printed and stops dispensing.

[0086] Continue to refer Figure 1 The controller 10 is electrically connected to the pulse signal generator 30 and the first transformer 41 respectively. The controller 10 can adjust the first pulse signal output from the first output end 31 of the pulse signal generator 30 and / or the first adjustment multiple of the first transformer 41 according to the distance information between the dispensing needle 51 and the to-be-printed area 61 on the to-be-printed substrate 60, thereby controlling the electric field between the dispensing needle 51 and the to-be-printed area 61. The specific adjustment logic can be referred to the above description and will not be repeated here.

[0087] As another possible implementation, Figure 6 A schematic diagram of another electrostatic field high-precision array point contactless dispensing device provided by an embodiment of the present invention, referring to Figure 6 The pulse signal generator 30 includes a second output terminal 32. The transformer 40 includes a second transformer 42. The pulse signal includes a second pulse signal. The second transformer 42 is connected in series between the second output terminal 32 and the substrate to be printed 60, and is configured to transform and regulate the second pulse signal output from the second output terminal 32 and transmit it to the substrate to be printed 60. The dispensing needle 51 is grounded.

[0088] It can be understood that the second pulse signal includes alternating high-level signals and low-level signals. The second transformer 42 is connected between the dispensing needle 51 and the second output terminal 32 of the pulse signal generator 30. The second pulse signal output from the second output terminal 32 of the pulse signal generator 30 can be voltage-transformed, that is, the high-level signal and the low-level signal of the second pulse signal can be amplified or reduced. The second pulse signal after voltage transformation and adjustment still includes alternating high-level signals and low-level signals. When the signal received by the substrate to be printed 60 is a high-level signal (voltage greater than zero) in the second pulse signal, the surface of the substrate to be printed 60 close to the dispensing needle 51 is positively charged. Since the dispensing needle 51 is grounded (voltage equal to zero), the droplets in the dispensing needle 51 are negatively charged. At this time, an electric field exists between the dispensing needle 51 and the substrate to be printed 60. Under the action of the electric field between the dispensing needle 51 and the substrate to be printed 60, the negatively charged droplets will move toward the substrate to be printed 60. That is, the dispensing needle 51 sprays droplets onto the substrate to be printed 60 to perform dispensing.

[0089] When the signal received by the substrate to be printed 60 is a low-level signal (voltage equal to or less than zero) in the second pulse signal, the surface of the substrate to be printed 60 close to the dispensing needle 51 is negatively charged. Since the dispensing needle 51 is grounded (voltage equal to zero), the droplets in the dispensing needle 51 are also negatively charged. At this time, there is no electric field between the dispensing needle 51 and the substrate to be printed 60, and the negatively charged droplets will not move toward the substrate to be printed 60. That is, the dispensing needle 51 stops spraying droplets onto the substrate to be printed 60 and stops dispensing.

[0090] Continue to refer Figure 6 The controller 10 is electrically connected to the pulse signal generator 30 and the second transformer 42 respectively. The controller 10 can adjust the second pulse signal output from the second output end 32 of the pulse signal generator 30 and / or the second adjustment multiple of the second transformer 42 according to the distance information between the dispensing needle 51 and the to-be-printed area 61 on the to-be-printed substrate 60, thereby controlling the electric field between the dispensing needle 51 and the to-be-printed area 61. The specific adjustment logic can be referred to the above description and will not be repeated here.

[0091] As another feasible implementation method, Figure 7A schematic diagram of a non-contact dispensing device for an electrostatic field high-precision array point is provided in accordance with an embodiment of the present invention. Figure 7 The pulse signal generator 30 includes a first output terminal 31 and a second output terminal 32. The transformer 40 includes a first transformer 41 and a second transformer 42. The pulse signal includes a first pulse signal and a second pulse signal. The first transformer 41 is connected in series between the first output terminal 31 and the dispensing needle 51, and is used to transform and regulate the first pulse signal output from the first output terminal 31 and transmit it to the dispensing needle 51. The second transformer 42 is connected in series between the second output terminal 32 and the substrate to be printed 60, and is used to transform and regulate the second pulse signal output from the second output terminal 32 and transmit it to the substrate to be printed 60. In the dispensing state, the first pulse signal and the second pulse signal have opposite polarities. In the non-dispensing state, the first pulse signal and the second pulse signal have the same polarity.

[0092] It can be understood that the first pulse signal includes alternating high-level signals (voltage greater than zero) and low-level signals (voltage equal to or less than zero), and the first transformer 41 is connected between the dispensing needle 51 and the first output terminal 31 of the pulse signal generator 30. The first pulse signal output from the first output terminal 31 of the pulse signal generator 30 can be voltage-transformed and regulated, that is, the high-level signal (voltage greater than zero) and the low-level signal (voltage equal to or less than zero) of the first pulse signal can be amplified or reduced. The second pulse signal after voltage transformation and regulation still includes alternating high-level signals (voltage greater than zero) and low-level signals (voltage equal to or less than zero). The second pulse signal includes alternating high-level signals (voltage greater than zero) and low-level signals (voltage equal to or less than zero). The second transformer 42 is connected between the dispensing needle 51 and the second output end 32 of the pulse signal generator 30. The second pulse signal output from the second output end 32 of the pulse signal generator 30 can be voltage-transformed and regulated, that is, the high-level signal (voltage greater than zero) and the low-level signal (voltage equal to or less than zero) of the second pulse signal can be amplified or reduced. The second pulse signal after voltage transformation and regulation still includes alternating high-level signals (voltage greater than zero) and low-level signals (voltage equal to or less than zero).

[0093] When the signal received by the dispensing needle 51 is a high-level signal (voltage greater than zero) in the first pulse signal, and the signal received by the substrate to be printed 60 is a low-level signal (voltage equal to or less than zero) in the second pulse signal, the droplets in the dispensing needle 51 are positively charged, and the surface of the substrate to be printed 60 close to the dispensing needle 51 is negatively charged. At this time, the first pulse signal and the second pulse signal have opposite polarities, and an electric field exists between the dispensing needle 51 and the substrate to be printed 60. Under the action of the electric field between the dispensing needle 51 and the substrate to be printed 60, the positively charged droplets will move toward the substrate to be printed 60, that is, the dispensing needle 51 sprays droplets onto the substrate to be printed 60 to perform dispensing.

[0094] When the signal received by the dispensing needle 51 is a low-level signal (voltage equal to or less than zero) in the first pulse signal, and the signal received by the substrate to be printed 60 is a high-level signal (voltage greater than zero) in the second pulse signal, the droplets in the dispensing needle 51 are negatively charged, and the surface of the substrate to be printed 60 close to the dispensing needle 51 is positively charged. At this time, the first pulse signal and the second pulse signal have opposite polarities, and an electric field exists between the dispensing needle 51 and the substrate to be printed 60. Under the action of the electric field between the dispensing needle 51 and the substrate to be printed 60, the negatively charged droplets will move toward the substrate to be printed 60, that is, the dispensing needle 51 sprays droplets onto the substrate to be printed 60 to perform dispensing.

[0095] When the signal received by the dispensing needle 51 is a high-level signal (voltage greater than zero) in the first pulse signal, and the signal received by the substrate to be printed 60 is a high-level signal (voltage greater than zero) in the second pulse signal, the droplets in the dispensing needle 51 are positively charged, and the surface of the substrate to be printed 60 close to the dispensing needle 51 is positively charged. At this time, the first pulse signal and the second pulse signal have the same polarity, and there is no electric field between the dispensing needle 51 and the substrate to be printed 60. The positively charged droplets will not move toward the substrate to be printed 60, that is, the dispensing needle 51 stops spraying droplets to the substrate to be printed 60 and stops dispensing.

[0096] When the signal received by the dispensing needle 51 is a low-level signal (voltage equal to or less than zero) in the first pulse signal, and the signal received by the substrate to be printed 60 is a low-level signal (voltage equal to or less than zero) in the second pulse signal, the droplets in the dispensing needle 51 are negatively charged, and the surface of the substrate to be printed 60 close to the dispensing needle 51 is negatively charged. At this time, the first pulse signal and the second pulse signal have opposite polarities, and there is no electric field between the dispensing needle 51 and the substrate to be printed 60. The negatively charged droplets will not move toward the substrate to be printed 60, that is, the dispensing needle 51 stops spraying droplets to the substrate to be printed 60 and stops dispensing.

[0097] Continue to refer Figure 1The controller 10 is electrically connected to the pulse signal generator 30, the first transformer 41 and the second transformer 42 respectively. The controller 10 can adjust the first pulse signal output from the first output end 31 of the pulse signal generator 30 and / or the first adjustment multiple of the first transformer 41 and / or the second adjustment multiple of the second transformer 42 according to the distance information between the dispensing needle 51 and the to-be-printed area 61 on the to-be-printed substrate 60, thereby controlling the electric field between the dispensing needle 51 and the to-be-printed area 61. The specific adjustment logic can be referred to the above description and will not be repeated here.

[0098] refer to Figure 1 、 Figure 6 and Figure 7 The electrostatic field high-precision array point non-contact dispensing device further includes a movable platform 70 for supporting the substrate 60 to be printed. The controller 10 is also electrically connected to the movement control terminal of the movable platform 70 for controlling the movement of the movable platform 70 along the second direction X and / or the third direction Y.

[0099] To achieve Figure 2-5 As shown in the array dispensing, the existing electrostatic field high-precision array point contactless dispensing device will be provided with a mobile platform 70 that can carry the substrate to be printed 60, and the mobile platform can cooperate with the dispensing state of the dispenser 40 to realize array dispensing. Specifically, when the dispenser 40 is in the dispensing state, that is, the dispensing needle 51 can spray droplets to the sub-area to be printed 611 of the area to be printed 61 on the substrate to be printed, the controller 10 will control the mobile platform 70 to stop moving to ensure that the dispensing of the current sub-area to be printed 611 is realized. When the dispenser 40 is in the non-dispensing state, that is, the dispensing needle 51 stops spraying droplets to the sub-area to be printed 611 of the area to be printed 61 on the substrate to be printed, the controller 10 will control the mobile platform 70 to move along the second direction X and / or the third direction Y to the next sub-area to be printed 611.

[0100] Figure 8 A schematic diagram of a non-contact dispensing device for an electrostatic field high-precision array point is provided in accordance with an embodiment of the present invention. Figure 8 The electrostatic field high-precision array point non-contact dispensing device in the embodiment of the present invention further includes a negative pressure machine 80, which is in communication with the dispensing needle 51. The controller 10 is also electrically connected to the negative pressure machine 80 and is used to control the operating state of the negative pressure machine 80 according to the state of the dispensing needle 51. In the dispensing state, the controller 10 controls the negative pressure machine 80 to stop working, and the negative pressure machine 80 stops providing negative pressure to the dispensing needle 51. In the non-dispensing state, the controller 10 controls the negative pressure machine 80 to start working, and the negative pressure machine 80 provides negative pressure to the dispensing needle 51.

[0101] refer to Figure 1 、 Figure 6 、 Figure 7and Figure 8 The glue dispenser 40 also includes a glue dispensing cavity 42 connected to the glue dispensing needle 51. The glue dispensing cavity 42 can be used to accommodate liquids such as solder, conductive glue, epoxy resin and adhesive.

[0102] It should be noted that when the dispensing needle 51 is in the dispensing state, i.e., when the dispensing needle 51 is capable of spraying droplets onto the substrate 60 to be printed, the droplets in the dispensing needle 51 move toward the substrate 60 to be printed not only due to the electric field between the dispensing needle 51 and the substrate 60 to be printed, but also due to the force of gravity. When the dispensing needle 51 is in the non-dispensing state, i.e., when the dispensing needle 51 stops spraying droplets onto the substrate 60 to be printed, the droplets in the dispensing needle 51 are only affected by gravity because there is no electric field between the dispensing needle 51 and the substrate 60 to be printed. In order to prevent the droplets in the dispensing needle 51 from being affected by gravity and causing the droplets in the dispensing needle 51 to fall onto the substrate 60 to be printed, or not fall but accumulate around the dispensing needle 51, the embodiment of the present invention is provided with a negative pressure machine 80 that is connected to the dispensing needle 51 through the dispensing cavity 42 and is electrically connected to the controller 10. The controller 10 can control the working state of the negative pressure machine 80 according to the state of the dispensing needle 51. Specifically, when the dispensing needle 51 is in the non-dispensing state, the controller 10 will control the negative pressure machine 80 to provide negative pressure to the dispensing needle 51. When the dispensing needle 51 is in the dispensing state, in order to prevent the negative pressure generated by the negative pressure machine 80 from affecting the dispensing of the dispensing needle 51, the controller 10 controls the negative pressure machine 80 to stop working, and the negative pressure machine 80 stops providing negative pressure to the dispensing needle 51.

[0103] refer to Figure 8 The electrostatic field high-precision array non-contact dispensing device of the embodiment of the present invention further includes a static eliminator 90. The controller 10 is also electrically connected to the static eliminator 90 and is configured to control the static eliminator 90 to generate positive and negative ions before the dispenser 40 operates, and to spray the positive and negative ions onto the dispensing needle 51 and the surface of the substrate 60 to be printed.

[0104] By setting a controller 10 to control the static electricity removal device 90 to generate positive and negative ions before the dispenser 40 works, and spraying the positive and negative ions on the surface of the dispensing needle 51 and the substrate to be printed 60, the static electricity of the dispensing needle 51 and the substrate to be printed 60 can be eliminated, avoiding affecting the electric field between the dispensing needle 51 and the substrate to be printed 60, which is beneficial to improving the control accuracy of the controller 10 on the dispensing of the dispenser 40.

[0105] Example 2

[0106] The embodiment of the present invention provides an electrostatic field high-precision array point non-contact glue dispensing method, which is applied to the electrostatic field high-precision array point non-contact glue dispensing device provided in the first embodiment of the present invention. Figure 9 A flow chart of a non-contact dispensing method for high-precision array points in an electrostatic field provided by an embodiment of the present invention, referring to Figure 9 The electrostatic field high-precision array point non-contact dispensing method in an embodiment of the present invention includes:

[0107] S110 , determining the distance information between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor.

[0108] Exemplary, reference Figure 1-5 The controller 10 is in communication with the distance measuring sensor 20 . The controller 10 can receive detection information detected by the distance measuring sensor 20 and determine the distance information between the dispensing needle 51 and the area to be printed 61 according to the detection information.

[0109] S120 , adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information to control the electric field between the dispensing needle and the area to be printed.

[0110] For example, continue to refer to Figure 1-5 The controller 10 is connected to the pulse signal generator 30 and the transformer 40 for communication, and can adjust the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 according to the distance information determined in step S110, thereby controlling the electric field between the dispensing needle 51 and the area to be printed 61, so as to ensure that the size of the droplets ejected by the dispensing needle 51 onto the area to be printed 61 is substantially consistent. For example, referring to Figure 2-5 The area to be printed 61 includes multiple sub-areas to be printed 611. The distance information between the multiple sub-areas to be printed 611 and the dispensing needle 51 is different. When the distance information between the dispensing needle 51 and the sub-area to be printed 611 is large, the controller 10 can increase the electric field between the dispensing needle 51 and the substrate to be printed 60 by increasing the amplitude of the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40, thereby increasing the size of the droplets sprayed by the dispensing needle 51 onto the sub-area to be printed 611. Alternatively, when the distance information between the dispensing needle 51 and the substrate to be printed 60 is large, the controller 10 can increase the electric field between the dispensing needle 51 and the substrate to be printed 60 by increasing the period of the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40, thereby increasing the size of the droplets sprayed by the dispensing needle 51 onto the sub-area to be printed 611.

[0111] The technical solution of the embodiment of the present invention is to set a controller 10 to adjust the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 according to the distance information between the dispensing needle 51 and the area to be printed 61 on the substrate to be printed 60, thereby controlling the electric field between the dispensing needle 51 and the area to be printed 61, so that the electric field between the dispensing needle 51 and the area to be printed 61 can change with the change of distance information. Different distance information corresponds to different electric fields, and under different electric fields, the size of the droplets sprayed by the dispensing needle 51 is also different. In this way, the size of the droplets sprayed by the dispensing needle 51 can change with the change of distance information, which is beneficial to reducing the influence of the difference in distance information between each sub-area to be printed 611 of the area to be printed 61 on the substrate to be printed 60 and the dispensing needle 51 on the dispensing consistency, thereby improving the accuracy of dispensing. By setting up the controller 10, it is possible to determine whether there is a through hole 62 or defect in the area to be printed 61 based on the determined distance information, and then control the glue needle 51 to not dispense glue on the through hole 62 or defect in the area to be printed 61 by adjusting the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40. In this way, the situation of mistakenly dispensing glue on the through hole 62 or defect can be avoided. Moreover, for a three-dimensional multi-layer substrate 60 to be printed, the controller 10 can also adjust the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 based on the distance information between each layer of the area to be printed 61 and the glue needle 51 to ensure that the droplets sprayed by the glue needle 51 on the different layers of the area to be printed 61 are consistent, eliminating the need to dispense glue multiple times according to the number of layers of the area to be printed 61, which is beneficial to improving the glue dispensing efficiency. By setting a technical solution in which the controller 10 is capable of adjusting the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 according to the distance information between the dispensing needle 51 and the area to be printed 61 on the substrate to be printed 60, the influence of the difference in distance information between each sub-area to be printed 611 of the area to be printed 61 on the substrate to be printed 60 and the dispensing needle 51 on the dispensing consistency is reduced. There is no need to control the movement of the substrate to be printed 60 or the dispensing needle 51 along the Z direction. It is only necessary to control the movement of the substrate to be printed 60 along the direction of the plane in which it is located. The motion control is simple, which is conducive to improving the dispensing efficiency. Since the dispensing needle 51 does not need to move, the droplets sprayed by the dispensing needle 51 are avoided from being offset due to its high response acceleration and deceleration movement up and down, which makes it difficult to control the accuracy of the droplet size, which is conducive to improving the accuracy of dispensing.

[0112] Based on the above embodiments, Figure 2-5 The area to be printed 61 includes at least two sub-areas to be printed 611 , and each sub-area to be printed 611 includes at least two dots to be printed. Figure 10 A flow chart of another electrostatic field high-precision array point non-contact dispensing method provided by an embodiment of the present invention, Figure 10 The embodiment shown in the figure describes in detail how to determine the distance information between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor and how to adjust the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information. Figure 10 The electrostatic field high-precision array point non-contact dispensing method in an embodiment of the present invention includes:

[0113] S210 , determining average distance information between the dispensing needle and the sub-area to be printed based on detection information of each to-be-printed point detected by the distance measuring sensor.

[0114] Exemplary, reference Figure 1-5 The detection information received by the distance measuring sensor 20 by the controller 10 may be the distance information between the dispensing needle 51 and multiple to-be-printed points on the to-be-printed sub-area 611. The controller 10 may determine the distance information between the dispensing needle 51 and the to-be-printed sub-area 611 by calculating the average of the distance information between the multiple to-be-printed points and the dispensing needle 51, thereby improving the accuracy of the distance information between the dispensing needle 51 and the to-be-printed sub-area 611.

[0115] S220 , adjusting the average pulse signal output by the pulse signal generator and / or the average adjustment factor of the transformer according to the average distance information.

[0116] Exemplary, reference Figure 1-5 Controller 10 can adjust the pulse signal output by pulse signal generator 30 and / or the adjustment factor of transformer 40 based on the average distance information determined in step S210, thereby controlling the electric field between dispensing needle 51 and area to be printed 61 to ensure that the size of the droplets ejected by dispensing needle 51 onto area to be printed 61 is substantially consistent. The specific adjustment logic can be referred to above and will not be repeated here. By configuring controller 10 to adjust the average pulse signal output by pulse signal generator and / or the average adjustment factor of transformer based on the more accurate average distance information, the accuracy of dispensing can be improved, and the effect of the flatness of area to be printed 61 on substrate to be printed 60 on the consistency of dispensing in sub-area to be printed 611 can be further reduced.

[0117] The controller 10 in the embodiment of the present invention can determine the average distance information between the dispensing needle 51 and all the sub-areas 611 to be printed, and adjust the average pulse signal output by the pulse signal generator and / or the average adjustment multiple of the transformer according to all the average distance information, and then control the mobile platform 70 to move in coordination with the dispensing state of the dispenser 40 to achieve array dispensing.

[0118] Based on the above embodiments, Figure 2-5The sub-area to be printed 611 on the area to be printed 61 includes a first dot to be printed, a second dot to be printed, a third dot to be printed, a fourth dot to be printed and a fifth dot to be printed, wherein the first dot to be printed, the second dot to be printed, the third dot to be printed and the fourth dot to be printed are located at the edge of the sub-area to be printed 611, and the fifth dot to be printed is located in the area surrounded by the first dot to be printed, the second dot to be printed, the third dot to be printed and the fourth dot to be printed. Figure 11 A flow chart of another electrostatic field high-precision array point contactless dispensing method provided by an embodiment of the present invention, Figure 11 The embodiment shown in the figure describes in detail how to determine the average distance information between the dispensing needle and the sub-area to be printed based on the detection information of each to-be-printed point detected by the distance measuring sensor. Figure 11 Step S210, determining the average distance information between the dispensing needle and the sub-area to be printed based on the detection information of each to-be-printed point detected by the distance measuring sensor, includes:

[0119] S211. Receive the first distance information between the dispensing needle and the first point to be printed, the second distance information between the dispensing needle and the second point to be printed, the third distance information between the dispensing needle and the third point to be printed, the fourth distance information between the dispensing needle and the fourth point to be printed, and the fifth distance information between the dispensing needle and the fifth point to be printed, detected by the distance measuring sensor.

[0120] Exemplary, reference Figure 1-5 , the fifth dot to be printed on the sub-area to be printed 611 can be located at the center of the sub-area to be printed 611, and the first dot to be printed, the second dot to be printed, the third dot to be printed, and the fourth dot to be printed are located at the edge of the sub-area to be printed 611, and are located above the left, above the right, below the right, and below the left of the fifth dot to be printed, respectively. The controller 10 can control the distance measuring sensor 20 to sequentially detect the first distance information between the dispensing needle 51 and the first dot to be printed, the second distance information between the dispensing needle 51 and the second dot to be printed, the third distance information between the dispensing needle 51 and the third dot to be printed, the fourth distance information between the dispensing needle 51 and the fourth dot to be printed, and the fifth distance information between the dispensing needle 51 and the fifth dot to be printed, and receive the first distance information, the second distance information, the third distance information, the fourth distance information, and the fifth distance information detected by the distance measuring sensor 20.

[0121] S212: Determine average distance information between the dispensing needle and the sub-area to be printed based on the first distance information, the second distance information, the third distance information, the fourth distance information, and the fifth distance information.

[0122] Exemplary, reference Figure 1-5The controller 10 determines the average distance information between the dispensing needle 51 and the to-be-printed sub-area 611 by calculating the average of the first distance information, the second distance information, the third distance information, the fourth distance information, and the fifth distance information.

[0123] Based on the above embodiments, Figure 2-5 The area to be printed 61 includes at least two sub-areas to be printed 611 . Figure 12 A flow chart of another electrostatic field high-precision array point contactless dispensing method provided by an embodiment of the present invention, Figure 12 The embodiment shown not only provides a detailed description of how to determine the distance information between the dispensing needle and the area to be printed based on the detection information of the distance measuring sensor and how to adjust the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer based on the distance information, but also enriches the process of the electrostatic field high-precision array point non-contact dispensing method, reference Figure 12 The electrostatic field high-precision array point non-contact dispensing method in an embodiment of the present invention includes:

[0124] S310 , determining the distance information between the dispensing needle and the current sub-area to be printed according to the detection information of the current sub-area to be printed detected by the distance measuring sensor.

[0125] Exemplary, reference Figure 1-5 The detection information of the distance measuring sensor 20 received by the controller 10 may be the distance information between the dispensing needle 51 and a to-be-printed point on the current to-be-printed sub-region 611. The to-be-printed point may be the center of the to-be-printed sub-region 611. The controller 10 may use the distance information between the to-be-printed point located at the center of the to-be-printed sub-region 611 and the dispensing needle 51 as the distance information between the dispensing needle 51 and the to-be-printed sub-region 611.

[0126] S320 , adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information between the dispensing needle and the sub-area to be printed currently.

[0127] refer to Figure 1-5 The controller 10 can adjust the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 according to the distance information determined in the above step S310, and then control the electric field between the dispensing needle 51 and the area to be printed 61 to ensure that the size of the droplets sprayed by the dispensing needle 51 to the current sub-area to be printed 611 can be basically consistent with the size of the droplets on other sub-areas to be printed 611. The specific adjustment logic can be referred to the above description and will not be repeated here.

[0128] S330 , determining the distance information between the dispensing needle and the next sub-area to be printed according to the detection information of the next sub-area to be printed detected by the distance measuring sensor.

[0129] Exemplarily, the specific implementation of step S330 is similar to that of step S310 and will not be repeated here.

[0130] S340 , adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information between the dispensing needle and the next sub-area to be printed.

[0131] Exemplarily, the specific implementation of step S340 is similar to that of step S320 and will not be repeated here.

[0132] The controller 10 in the embodiment of the present invention determines the average distance information between the dispensing needle 51 and the current sub-area to be printed 611, and adjusts the average pulse signal output by the pulse signal generator and / or the average adjustment multiple of the transformer according to the distance information between the dispensing needle 51 and the current sub-area to be printed 611, and controls the mobile platform 70 to move in coordination with the dispensing state of the glue dispenser 40 to realize array dispensing. Compared with the technical solution of first determining the average distance information between the dispensing needle 51 and all sub-areas to be printed 611, and adjusting the average pulse signal output by the pulse signal generator and / or the average adjustment multiple of the transformer according to all the average distance information, and then controlling the mobile platform 70 to move in coordination with the dispensing state of the glue dispenser 40 to realize array dispensing, the dispensing efficiency of the solution of the embodiment of the present invention of moving, detecting and dispensing is higher. Especially in the case of Figure 4 and Figure 5 When the substrate to be printed is array-dispensed, this solution does not need to analyze the number of layers of the substrate to be printed and the shape and position of the through-holes before dispensing. Dispensing or not dispensing can be performed directly based on the average distance information between the dispensing needle 51 and the current sub-area to be printed 611.

[0133] Based on the above embodiments, Figure 13 A flow chart of another electrostatic field high-precision array point contactless dispensing method provided by an embodiment of the present invention, Figure 13 The embodiment shown enriches the process of the electrostatic field high precision array point contactless dispensing method, refer to Figure 13 The electrostatic field high-precision array point non-contact dispensing method in an embodiment of the present invention includes:

[0134] S410, determining an initial pulse signal output by a pulse signal generator and an initial adjustment multiple of a transformer according to a preset glue dot shape, a preset distance between a glue dispensing needle and a substrate to be printed, and a viscosity of a droplet in a glue dispenser.

[0135] Exemplary, reference Figure 1-5, the preset glue dot shape can be the aspect ratio of the droplet sprayed by the glue needle 51 on the to-be-printed area 61. The controller 10 can determine the initial pulse signal output by the pulse signal generator 30 and the initial adjustment multiple of the transformer 40 based on the preset glue dot shape, the preset distance between the glue needle 51 and the substrate 60 to be printed, and the viscosity of the droplet in the glue dispenser 50. It can be understood that the liquid contained in the glue dispensing cavity 42 in the glue dispenser 40 can be flux, conductive glue, epoxy resin or adhesive. Different liquids have different corresponding viscosities. The greater the viscosity, the greater the electric field force required when the glue dispensing needle 51 sprays the droplet. For example, when the viscosity of the liquid in the glue dispensing cavity 42 is relatively high, the controller 10 can appropriately increase the initial pulse signal output by the pulse signal generator 30 and / or the initial adjustment multiple of the transformer 40.

[0136] S420: Determine the distance between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor.

[0137] S430: Adjust the initial pulse signal and / or the initial adjustment factor according to the distance information.

[0138] Exemplary, reference Figure 1-5 The controller 10 can adjust the initial pulse signal of the pulse signal generator 30 and / or the initial adjustment multiple of the transformer 40 according to the distance information determined in the above step S420, and then control the electric field between the dispensing needle 51 and the area to be printed 61 to ensure that the size of the droplets sprayed by the dispensing needle 51 onto the area to be printed 61 is basically consistent. The specific adjustment logic can be referred to the above description and will not be repeated here.

[0139] In the embodiment of the present invention, the controller 10 is set to first determine the initial pulse signal output by the pulse signal generator 30 and the initial adjustment multiple of the transformer 40 according to the preset glue dot shape, the preset distance between the dispensing needle 51 and the substrate to be printed 60, and the viscosity of the droplet in the dispenser 50, and then adjust the initial pulse signal and the initial adjustment multiple according to the distance information between the dispensing needle 51 and the area to be printed 61, that is, first coarse adjustment and then fine adjustment. Compared with the technical solution of directly adjusting the pulse signal output by the pulse signal generator 30 and / or the adjustment multiple of the transformer 40 according to the distance information between the dispensing needle 51 and the area to be printed 61, that is, direct fine adjustment, the technical solution of the embodiment of the present invention is more efficient.

[0140] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. An electrostatic field high-precision array point non-contact dispensing device, characterized in that: Including controller, distance sensor, pulse signal generator, transformer and dispenser; The glue dispenser includes a glue dispensing needle; The input end of the transformer is electrically connected to the output end of the pulse signal generator; The controller is respectively in communication with the distance sensor, the pulse signal generator, and the transformer, and is used to determine the distance information between the dispensing needle and the to-be-printed area on the substrate to be printed according to the detection information of the distance sensor, and adjust the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information to control the electric field between the dispensing needle and the to-be-printed area; The area to be printed includes at least two sub-areas to be printed; The controller is configured to control the glue dispensing needle not to dispense glue to the unqualified sub-area to be printed by adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer when the distance information between the sub-area to be printed and the glue dispensing needle exceeds a first preset range, i.e., when it is determined that the sub-area to be printed is unqualified; The electrostatic field high-precision array point non-contact dispensing device also includes a static elimination device; the controller is also electrically connected to the static elimination device, and is used to control the static elimination device to generate positive and negative ions before the dispenser works, and spray the positive and negative ions onto the dispensing needle and the surface of the substrate to be printed; The controller is configured to determine an initial pulse signal output by the pulse signal generator and an initial adjustment factor of the transformer according to a preset glue dot shape, a preset distance between the glue dispensing needle and the substrate to be printed, and a viscosity of a droplet in the glue dispenser, and to adjust the initial pulse signal and / or the initial adjustment factor according to the distance information; The area to be printed includes at least two sub-areas to be printed, and each sub-area to be printed includes at least two dots to be printed; Determining the distance information between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor includes: Determine the average distance information between the dispensing needle and the sub-area to be printed according to the detection information of each of the to-be-printed points detected by the distance measuring sensor; Adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information includes: adjusting the average pulse signal output by the pulse signal generator and / or the average adjustment multiple of the transformer according to the average distance information; The sub-area to be printed includes a first dot to be printed, a second dot to be printed, a third dot to be printed, a fourth dot to be printed, and a fifth dot to be printed, wherein the fifth dot to be printed is located at the center of the sub-area to be printed, and the first dot to be printed, the second dot to be printed, the third dot to be printed, and the fourth dot to be printed are located at the edges of the sub-area to be printed, and are located above the left, above the right, below the right, and below the left of the fifth dot to be printed, respectively; Determining average distance information between the dispensing needle and the sub-area to be printed according to detection information of each to-be-printed point detected by the distance measuring sensor, including: receiving first distance information between the dispensing needle and the first point to be printed, second distance information between the dispensing needle and the second point to be printed, third distance information between the dispensing needle and the third point to be printed, fourth distance information between the dispensing needle and the fourth point to be printed, and fifth distance information between the dispensing needle and the fifth point to be printed, detected by the distance measuring sensor; The average distance information between the dispensing needle and the sub-area to be printed is determined according to the first distance information, the second distance information, the third distance information, the fourth distance information and the fifth distance information.

2. The electrostatic field high-precision array point non-contact dispensing device according to claim 1 is characterized in that: The pulse signal generator includes a first output terminal; the transformer includes a first transformer; the pulse signal includes a first pulse signal; The first transformer is connected in series between the first output end and the dispensing needle, and is used to perform voltage transformation and regulation on the first pulse signal output from the first output end and transmit the signal to the dispensing needle; The substrate to be printed is grounded.

3. The electrostatic field high-precision array point non-contact dispensing device according to claim 1 is characterized in that: The pulse signal generator includes a second output terminal; the transformer includes a second transformer; the pulse signal includes a second pulse signal; The second transformer is connected in series between the second output terminal and the substrate to be printed, and is used to transform and regulate the second pulse signal output from the second output terminal and transmit the second pulse signal to the substrate to be printed; The dispensing needle is grounded.

4. The electrostatic field high-precision array point non-contact dispensing device according to claim 1 is characterized in that: The pulse signal generator includes a first output terminal and a second output terminal; the transformer includes a first transformer and a second transformer; the pulse signal includes a first pulse signal and a second pulse signal; The first transformer is connected in series between the first output end and the dispensing needle, and is used to perform voltage transformation and regulation on the first pulse signal output from the first output end and transmit the signal to the dispensing needle; The second transformer is connected in series between the second output terminal and the substrate to be printed, and is used to transform and regulate the second pulse signal output from the second output terminal and transmit the second pulse signal to the substrate to be printed; In the dispensing state, the first pulse signal and the second pulse signal have opposite polarities; In a non-dispensing state, the first pulse signal and the second pulse signal have the same polarity.

5. The electrostatic field high-precision array point non-contact dispensing device according to claim 1 is characterized in that: The electrostatic field high-precision array point contactless dispensing device further includes a negative pressure machine, which is connected to the dispensing needle; The controller is also electrically connected to the negative pressure machine and is used to control the working state of the negative pressure machine according to the state of the dispensing needle; In the dispensing state, the controller controls the negative pressure machine to stop working, and the negative pressure machine stops providing negative pressure to the dispensing needle; In a non-dispensing state, the controller controls the negative pressure machine to start working, and the negative pressure machine provides negative pressure for the dispensing needle.

6. A method for non-contact dispensing of high-precision array points in an electrostatic field, applied to the non-contact dispensing device for high-precision array points in an electrostatic field according to any one of claims 1 to 5, characterized in that: The electrostatic field high-precision array point non-contact dispensing method comprises: Determining the distance between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor; Adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information to control the electric field between the dispensing needle and the area to be printed; When the distance information between the sub-area to be printed and the dispensing needle exceeds a first preset range, that is, when it is determined that the sub-area to be printed is unqualified, the dispensing needle is controlled not to dispense glue on the unqualified sub-area to be printed by adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer; Before determining the distance information between the dispensing needle and the to-be-printed area according to the detection information of the distance measuring sensor, the electrostatic field high-precision array point non-contact dispensing method further includes: Determining the initial pulse signal output by the pulse signal generator and the initial adjustment multiple of the transformer according to a preset glue dot shape, a preset distance between the glue dispensing needle and the substrate to be printed, and the viscosity of the liquid drop in the glue dispenser; Adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information includes: adjusting the initial pulse signal and / or the initial adjustment multiple according to the distance information; The area to be printed includes at least two sub-areas to be printed, and each sub-area to be printed includes at least two dots to be printed; Determining the distance information between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor includes: Determine the average distance information between the dispensing needle and the sub-area to be printed according to the detection information of each of the to-be-printed points detected by the distance measuring sensor; Adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information includes: adjusting the average pulse signal output by the pulse signal generator and / or the average adjustment multiple of the transformer according to the average distance information; The sub-area to be printed includes a first dot to be printed, a second dot to be printed, a third dot to be printed, a fourth dot to be printed, and a fifth dot to be printed, wherein the fifth dot to be printed is located at the center of the sub-area to be printed, and the first dot to be printed, the second dot to be printed, the third dot to be printed, and the fourth dot to be printed are located at the edges of the sub-area to be printed, and are located above the left, above the right, below the right, and below the left of the fifth dot to be printed, respectively; Determining average distance information between the dispensing needle and the sub-area to be printed according to detection information of each to-be-printed point detected by the distance measuring sensor, including: receiving first distance information between the dispensing needle and the first point to be printed, second distance information between the dispensing needle and the second point to be printed, third distance information between the dispensing needle and the third point to be printed, fourth distance information between the dispensing needle and the fourth point to be printed, and fifth distance information between the dispensing needle and the fifth point to be printed, detected by the distance measuring sensor; The average distance information between the dispensing needle and the sub-area to be printed is determined according to the first distance information, the second distance information, the third distance information, the fourth distance information and the fifth distance information.

7. The electrostatic field high-precision array point non-contact dispensing method according to claim 6, characterized in that: The area to be printed includes at least two sub-areas to be printed; Determining the distance information between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor includes: Determine the distance information between the dispensing needle and the current sub-area to be printed according to the detection information of the current sub-area to be printed detected by the distance measuring sensor; Adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information includes: Adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information between the dispensing needle and the current sub-area to be printed; After adjusting the pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer according to the distance information between the dispensing needle and the current sub-area to be printed, the electrostatic field high-precision array point non-contact dispensing method further includes: Determine the distance information between the dispensing needle and the next sub-area to be printed according to the detection information of the next sub-area to be printed detected by the distance measuring sensor; The pulse signal output by the pulse signal generator and / or the adjustment multiple of the transformer are adjusted according to the distance information between the dispensing needle and the next sub-area to be printed.

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