CN118455003A - Electrostatic field high-precision array point non-contact glue dispensing device and method - Google Patents

Abstract

The invention discloses a device and a method for electrostatic field high-precision array point non-contact adhesive. The dispensing device comprises a controller, a ranging sensor, a pulse signal generator, a transformer and a dispenser; the dispensing device comprises a dispensing needle head; the input end of the transformer is electrically connected with the output end of the pulse signal generator; the controller is respectively connected with the ranging sensor, the pulse signal generator and the transformer in a communication way, and is used for determining the distance information between the dispensing needle head and the region to be printed on the substrate to be printed according to the detection information of the ranging sensor, and adjusting the pulse signal output by the pulse signal generator and/or the adjustment multiple of the transformer according to the distance information so as to control the electric field between the dispensing needle head and the region to be printed. According to the invention, the controller is arranged to adjust the pulse signal output by the pulse signal generator and/or the adjustment multiple of the transformer according to the distance information, so that the electric field between the dispensing needle head and the area to be printed is controlled, and the influence of the flatness of the area to be printed on the dispensing consistency can be reduced.

Description

Electrostatic field high-precision array point non-contact glue dispensing device and method

Technical Field

The present invention relates to the technical field of glue dispensing, and in particular to a non-contact glue dispensing device and method for high-precision array points in an electrostatic field.

Background Art

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 the fields of electronic integration, semiconductor packaging, and flat panel display integration.

The commonly used non-contact dispensing technology currently available is to achieve dispensing by controlling the electric field between the dispensing needle and the substrate to be printed.

However, the above-mentioned contactless dispensing technology has the following problems: 1. The to-be-printed area 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 to-be-printed sub-areas on the to-be-printed area and the dispensing needle are different, which will affect the consistency of dispensing in the sub-areas to be printed. 2. Some to-be-printed sub-areas of 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 dispensed by mistake. 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, and the errors will affect the sub-areas to be printed around them. In addition, due to the insufficient dispensing accuracy of the existing contactless dispensing technology, 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 of each layer and the dispensing component 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, and the dispensing efficiency is low. 5. When the existing contactless dispensing technology realizes array dispensing of planar substrates to be printed or three-dimensional multi-layer substrates to be printed, in order 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, it is necessary to control the substrate to be printed or the dispensing needle to move along the Z direction. The 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

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

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 sensor, a pulse signal generator, a transformer and a glue 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 communicatively connected to the distance measuring sensor, the pulse signal generator and the transformer respectively, and is used to determine the distance information between the dispensing needle and the area to be printed on the substrate to be printed according to the detection information of the distance measuring 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 area to be printed.

Optionally, 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.

Optionally, 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 it to the substrate to be printed;

The dispensing needle is grounded.

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;

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 it 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.

Optionally, the electrostatic field high-precision array point non-contact glue dispensing device further includes a negative pressure machine, and the negative pressure machine is connected to the glue 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.

In a second aspect, an 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 described in the first aspect, and the electrostatic field high-precision array point non-contact glue dispensing method includes:

Determine the distance information between the dispensing needle and the area to be printed according to the detection information of 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 to control the electric field between the dispensing needle and the area to be printed.

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

Determining the distance information between the dispensing needle and the to-be-printed area 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:

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.

Optionally, the sub-region 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-region 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;

Determining average distance information between the dispensing needle and the sub-area to be printed according to detection information of each of the to-be-printed points detected by the distance measuring sensor includes:

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;

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.

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

Determining the distance information between the dispensing needle and the to-be-printed area 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.

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:

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 droplet 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:

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

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 is a through hole or defect 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 not to 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, it is possible to avoid the situation where the through holes or defects are mistakenly dispensed. 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 in 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 the dispensing needle and the sub-area to be printed on the substrate to be printed on the substrate to be printed on the dispensing consistency can be 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 can be avoided, and the droplet size accuracy is difficult to control, which is conducive to improving the dispensing accuracy.

It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. 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.

FIG1 is a schematic structural diagram of an electrostatic field high-precision array point non-contact dispensing device provided by an embodiment of the present invention;

FIG2 is a schematic structural diagram of a substrate to be printed provided by an embodiment of the present invention;

FIG3 is a schematic structural diagram of another substrate to be printed provided by an embodiment of the present invention;

FIG4 is a schematic structural diagram of another substrate to be printed provided by an embodiment of the present invention;

FIG5 is a schematic structural diagram of another substrate to be printed provided by an embodiment of the present invention;

FIG6 is a schematic structural diagram of another electrostatic field high-precision array point non-contact glue dispensing device provided by an embodiment of the present invention;

FIG7 is a schematic structural diagram of another electrostatic field high-precision array point non-contact dispensing device provided by an embodiment of the present invention;

FIG8 is a schematic structural diagram of another electrostatic field high-precision array point contactless dispensing device provided by an embodiment of the present invention;

FIG9 is a flow chart of a method for non-contact dispensing of high-precision array points in an electrostatic field provided by an embodiment of the present invention;

FIG10 is a flow chart of another electrostatic field high-precision array point non-contact dispensing method provided by an embodiment of the present invention;

FIG11 is a flow chart of another electrostatic field high-precision array point non-contact dispensing method provided by an embodiment of the present invention;

FIG12 is a flow chart of another electrostatic field high-precision array point non-contact dispensing method provided by an embodiment of the present invention;

FIG. 13 is a flow chart of another electrostatic field high-precision array point contactless dispensing method provided by an embodiment of the present invention.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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 described embodiments 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 creative work should fall within the scope of protection of the present invention.

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 data used in this way can be interchanged 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 of their variations 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 inherent to these processes, methods, products or devices. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only used to illustrate the relative positional relationship between the components or components, and does not particularly limit the specific installation orientation of the components or components.

Embodiment 1

FIG. 1 is a schematic diagram of the structure of an electrostatic field high-precision array point non-contact glue dispensing device provided by an embodiment of the present invention, and FIG. 2 is a schematic diagram of the structure of a substrate to be printed provided by an embodiment of the present invention. Referring to FIG. 1 and FIG. 2, the electrostatic field high-precision array point non-contact glue 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 glue dispenser 50. The glue dispenser 50 includes a glue 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 glue dispensing needle 51 and the to-be-printed area 61 on the substrate 60 to be printed 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 glue dispensing needle 51 and the to-be-printed area 61.

Exemplarily, the controller 10 is respectively connected to the pulse signal generator 30 and the transformer 40 in communication. The controller 10 can control the pulse signal output by the pulse signal generator 30 and the adjustment multiple of the transformer 40 according to the printing requirements. The input end of the transformer 40 is electrically connected to the output end of the pulse signal generator 30. The transformer 40 can perform voltage transformation and adjustment on the pulse signal output by the pulse signal generator 30 according to the adjustment multiple. It should be noted that the above-mentioned printing requirements may include at least one of a preset glue dot shape, a preset distance between the glue dispensing needle and the substrate to be printed, and the viscosity of the droplet in the glue dispenser.

Continuing to refer to Figures 1 and 2, the embodiment of the present invention can achieve the purpose of controlling the electric field between the dispensing needle 51 and the area to be printed 61 by applying the pulse signal after voltage transformation and 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.

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 there is an electric field between the dispensing needle 51 and the area to be printed 61, the liquid droplets in the dispensing needle 51 are acted upon 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 there is no electric field between the dispensing needle 51 and the area to be printed 61, the liquid droplets in the dispensing needle 51 stop being sprayed onto the area to be printed 61.

With reference to FIG. 2 , it can be understood that the area to be printed 61 on the substrate to be printed 60, that is, the surface of the substrate to be printed 60 close to the glue dispensing needle 51, may be uneven, and the distance information between the multiple sub-areas to be printed 611 of the area to be printed 61 and the glue dispensing needle 51 is different. It can be understood that when the pulse signal acting on the glue dispensing needle 51 and/or the area to be printed 61 on the substrate to be printed 60 remains unchanged, the greater the distance information between the glue dispensing needle 51 and the sub-area to be printed 611, the smaller the electric field between the glue dispensing needle 51 and the sub-area to be printed 611, and the smaller the droplets sprayed by the glue dispensing needle 51 to the sub-area to be printed 611.

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 provides a distance sensor 20 which 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 detected detection information can be the distance information between the dispensing needle 51 and one or more to-be-printed points (not shown in FIG. 2 ) on the to-be-printed sub-area 611. The controller 10 can determine the distance information between the dispensing needle 51 and the to-be-printed sub-area 611 based on the received detection information, and 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 to ensure that the size of the droplets sprayed by the dispensing needle 51 onto the to-be-printed sub-area 611 is basically 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 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 lengthening 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.

Referring to FIG. 2 , the substrate to be printed 60 shown in FIG. 2 is a single-layer substrate, and 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 on the side close to the glue 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 protrusions. Ideally, the distance information between the 6 sub-areas to be printed 611 on the substrate to be printed 60 and the glue dispensing needle 51 is the same, but considering the manufacturing error when manufacturing the substrate to be printed 60, it can be understood that the distance information between the 6 sub-areas to be printed 611 and the glue dispensing needle 51 will be different, and there may even be unqualified sub-areas to be printed 611, wherein the unqualified sub-areas to be printed 611 refer to the sub-areas to be printed 611 whose distance information with the glue dispensing needle 51 exceeds the first preset range, and the qualified sub-areas to be printed 611 refer to the sub-areas to be printed 611 whose distance information with the glue dispensing needle 51 does not exceed the first preset range.

To ensure that the size of the droplets sprayed by the glue dispensing needle 51 onto the qualified sub-area to be printed 611 can be kept consistent, and to avoid dispensing glue 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 according to the distance information between each layer of the sub-area to be printed and the glue 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 glue 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 according to the distance information between the sub-area to be printed 611 and the glue dispensing needle 51 to keep the droplets sprayed by the glue dispensing needle 51 on each qualified sub-area to be printed 611 consistent. The specific adjustment logic can be referred to the above description, which will not be repeated here.

For unqualified sub-area 611 to be printed, that is, the sub-area 611 to be printed whose distance information from the glue dispensing needle 51 does not exceed the first preset range, the controller 10 can control the glue dispensing needle 51 not to dispense glue to the unqualified sub-area 611 to be printed 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 glue dispensing needle 51 and the sub-area 611 to be printed exceeds the first preset range, the controller 10 can reduce the electric field between the glue dispensing needle 51 and the substrate 60 to be printed 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 droplets in the glue dispensing needle 51 from being sprayed onto the sub-area 611 to be printed. 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.

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.

FIG3 is a schematic diagram of the structure of another substrate to be printed provided by an embodiment of the present invention. Referring to FIG3 , the substrate to be printed 60 shown in FIG3 is also single-layered 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 on the side close to the glue 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. The embodiment shown in FIG3 is different from the embodiment shown in FIG2 in that the specific structure of the sub-area to be printed 611 and the preset range based on which the sub-area to be printed 611 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 sub-area to be printed 611 and the glue dispensing needle 51, which is similar to the embodiment shown in FIG2 . Please refer to the above description and will not be repeated here.

FIG4 is a schematic structural diagram of another substrate to be printed provided in an embodiment of the present invention. Referring to FIG4 , the substrate to be printed 60 shown in FIG4 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, and each of the above sub-areas to be printed 611 (611A, 611B and 611C) is a protrusion. The difference between the embodiment shown in Figure 4 and the embodiment shown in Figure 2 lies in the number and position of the to-be-printed area 61 and the preset range for judging whether the to-be-printed sub-area 611 on each to-be-printed area 61 is 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, which is similar to the embodiment shown in Figure 2. Please refer to the above description and no further details will be given here.

FIG5 is a schematic diagram of the structure of another substrate to be printed provided by an embodiment of the present invention. Referring to FIG5 , the substrate to be printed 60 shown in FIG5 is a single-layer substrate, including a region to be printed 61 and three irregular through holes 62. The region to be printed 61 includes a plurality of sub-regions to be printed 611 arranged in an array, and the sub-regions to be printed 611 may be protrusions or grooves. The controller 10 in the embodiment of the present invention can determine the position of the through hole 62 on the region to be printed 61 according to the distance information between the dispensing needle 51 and the region to be printed 61 on the substrate to be printed 60, and then control the dispensing needle 51 not to spray droplets to 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, so that the situation of dispensing glue to the through hole 62 by mistake can be avoided.

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

The technical solution of the embodiment of the present invention is to set a controller 10 so as 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. The electric field between the dispensing needle 51 and the area to be printed 61 can change with the change of the distance information. Different distance information corresponds to different electric fields. 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 the distance information, which is beneficial to reduce the influence of the difference in distance information between each sub-area 611 to be printed 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 the controller 10, it can be determined whether there is a through hole 62 or a defect in the area to be printed 61 according to the determined distance information, and then the glue dispensing needle 51 can be controlled not to 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 mis-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 according to the distance information between the area to be printed 61 of each layer and the glue dispensing needle 51 to make the droplets sprayed by the glue dispensing needle 51 in the areas to be printed 61 of different layers consistent, and there is no need to dispense glue in multiple times according to the number of layers of the area to be printed 61, which is conducive to improving the glue dispensing efficiency. By setting the controller 10 to be able 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, the influence of the difference in distance information between the dispensing needle 51 and each sub-area to be printed 611 of the area to be printed 61 on the substrate to be printed 60 on the dispensing consistency can be reduced. There is no need to control the substrate to be printed 60 or the dispensing needle 51 to move along the Z direction. It is only necessary to control the substrate to be printed 60 to move along the direction of the plane where 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, and it is difficult to control the accuracy of the droplet size, which is conducive to improving the accuracy of dispensing.

As a feasible implementation, referring to FIG1 , the 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 adjust 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.

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 glue dispensing needle 51 is a high-level signal (voltage greater than zero) in the first pulse signal, the liquid droplets in the glue dispensing needle 51 are positively charged, and because the substrate 60 to be printed is grounded (voltage equal to zero), the surface of the substrate 60 to be printed close to the glue dispensing needle 51 is negatively charged. At this time, there is an electric field between the glue dispensing needle 51 and the substrate 60 to be printed. The positively charged liquid droplets will move toward the substrate 60 to be printed under the action of the electric field between the glue dispensing needle 51 and the substrate 60 to be printed, that is, the glue dispensing needle 51 sprays liquid droplets to the substrate 60 to be printed for glue dispensing.

When the signal received by the dispensing needle 51 is a low-level signal (voltage is 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 is 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 to the substrate 60 to be printed and stops dispensing.

Continuing with reference to 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 terminal 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 area to be printed 61 on the substrate 60 to be printed, thereby controlling the electric field between the dispensing needle 51 and the area to be printed 61. The specific adjustment logic can be referred to the above description and will not be repeated here.

As another feasible implementation, FIG6 is a schematic diagram of the structure of another electrostatic field high-precision array point non-contact dispensing device provided by an embodiment of the present invention. Referring to FIG6, 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 60 to be printed, and is used to transform and regulate the second pulse signal output from the second output terminal 32 and transmit it to the substrate 60 to be printed. The dispensing needle 51 is grounded.

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 regulation 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 glue dispensing needle 51 is positively charged, and because the glue dispensing needle 51 is to be grounded (voltage equal to zero), the droplets in the glue dispensing needle 51 are negatively charged. At this time, there is an electric field between the glue dispensing needle 51 and the substrate to be printed 60. The negatively charged droplets will move toward the substrate to be printed 60 under the action of the electric field between the glue dispensing needle 51 and the substrate to be printed 60, that is, the glue dispensing needle 51 sprays droplets to the substrate to be printed 60 for dispensing.

When the signal received by the substrate 60 to be printed is a low-level signal (voltage is equal to or less than zero) in the second pulse signal, the surface of the substrate 60 to be printed close to the glue dispensing needle 51 is negatively charged, and because the glue dispensing needle 51 is to be grounded (voltage is equal to zero), the droplets in the glue dispensing needle 51 are also negatively charged. At this time, there is no electric field between the glue 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, that is, the glue dispensing needle 51 stops spraying droplets to the substrate 60 to be printed and stops dispensing.

Continuing to refer to 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 terminal 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.

As another feasible implementation, FIG7 is a schematic diagram of the structure of another electrostatic field high-precision array point contactless dispensing device provided by an embodiment of the present invention. Referring to FIG7, 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 adjust 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 60 to be printed, and is used to transform and adjust the second pulse signal output from the second output terminal 32 and transmit it to the substrate 60 to be printed. In the dispensing state, the first pulse signal and the second pulse signal have opposite polarity. In the non-dispensing state, the first pulse signal and the second pulse signal have the same polarity.

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 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 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).

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 there is an 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 under the action of the electric field between the dispensing needle 51 and the substrate to be printed 60, that is, the dispensing needle 51 sprays droplets to the substrate to be printed 60 for dispensing.

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

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.

When the signal received by the glue 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 glue dispensing needle 51 are negatively charged, and the surface of the substrate to be printed 60 close to the glue 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 glue 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 glue dispensing needle 51 stops spraying droplets to the substrate to be printed 60 and stops dispensing.

Continuing to refer to Figure 1, the 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 terminal 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.

1, 6 and 7, the electrostatic field high-precision array point non-contact dispensing device further includes a mobile platform 70, and the mobile platform 70 is used to carry the substrate to be printed 60. The controller 10 is also electrically connected to the mobile control terminal of the mobile platform 70, and is used to control the mobile platform 70 to move along the second direction X and/or the third direction Y.

In order to realize the array dispensing as shown in Figures 2-5, the existing electrostatic field high-precision array non-contact dispensing device will be provided with a mobile platform 70 that can carry the substrate 60 to be printed, 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 611 to be printed of the area 61 to be printed on the substrate 60 to be printed, the controller 10 will control the mobile platform 70 to stop moving to ensure the dispensing of the current sub-area 611 to be printed. When the dispenser 40 is in the non-dispensing state, that is, the dispensing needle 51 stops spraying droplets to the sub-area 611 to be printed of the area 61 to be printed on the substrate 60 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 611 to be printed.

FIG8 is a schematic structural diagram of another electrostatic field high-precision array point non-contact glue dispensing device provided in an embodiment of the present invention. Referring to FIG8 , the electrostatic field high-precision array point non-contact glue dispensing device in an embodiment of the present invention further includes a negative pressure machine 80, and the negative pressure machine 80 is connected to the glue dispensing needle 51. The controller 10 is also electrically connected to the negative pressure machine 80, and is used to control the working state of the negative pressure machine 80 according to the state of the glue dispensing needle 51. In the glue 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 glue dispensing needle 51. In the non-glue 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 glue dispensing needle 51.

1 , 6 , 7 and 8 , the glue dispenser 40 further includes a glue dispensing chamber 42 connected to the glue dispensing needle 51 , and the glue dispensing chamber 42 can be used to contain liquids such as flux, conductive glue, epoxy resin and adhesive.

It should be noted that when the glue dispensing needle 51 is in the glue dispensing state, that is, the glue dispensing needle 51 can spray liquid droplets onto the substrate to be printed 60, the liquid droplets in the glue dispensing needle 51 move toward the substrate to be printed 60 not only because of the electric field between the glue dispensing needle 51 and the substrate to be printed 60, but also because of the gravity. When the glue dispensing needle 51 is in the non-glue dispensing state, that is, the glue dispensing needle 51 stops spraying liquid droplets onto the substrate to be printed 60, since there is no electric field between the glue dispensing needle 51 and the substrate to be printed 60, the liquid droplets in the glue dispensing needle 51 are only affected by the gravity. In order to prevent the droplets in the glue dispensing needle 51 from being affected by gravity, causing the droplets in the glue dispensing needle 51 to fall onto the substrate 60 to be printed, or not fall but accumulate around the glue dispensing needle 51, the embodiment of the present invention is provided with a negative pressure machine 80 that is connected to the glue dispensing needle 51 through the glue 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 glue dispensing needle 51. Specifically, when the glue dispensing needle 51 is in a non-glue dispensing state, the controller 10 will control the negative pressure machine 80 to provide negative pressure for the glue dispensing needle 51. When the glue dispensing needle 51 is in a glue dispensing state, in order to prevent the negative pressure generated by the negative pressure machine 80 from affecting the glue dispensing of the glue 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 for the glue dispensing needle 51.

8 , the electrostatic field high-precision array point non-contact dispensing device in the embodiment of the present invention further includes a static elimination device 90. The controller 10 is also electrically connected to the static elimination device 90, and is used to control the static elimination device 90 to generate positive and negative ions before the dispensing device 40 works, and spray the positive and negative ions on the surface of the dispensing needle 51 and the substrate 60 to be printed.

By setting the 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 60 to be printed, the static electricity of the dispensing needle 51 and the substrate 60 to be printed can be eliminated, avoiding affecting the electric field between the dispensing needle 51 and the substrate 60 to be printed, which is beneficial to improving the control accuracy of the controller 10 on the dispensing of the dispenser 40.

Embodiment 2

An 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. FIG9 is a flow chart of an electrostatic field high-precision array point non-contact glue dispensing method provided in an embodiment of the present invention. Referring to FIG9, the electrostatic field high-precision array point non-contact glue dispensing method in the embodiment of the present invention includes:

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.

Exemplarily, referring to FIGS. 1-5 , the controller 10 is in communication connection with the distance measuring sensor 20 , and 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.

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.

Exemplarily, with continued reference to FIGS. 1-5 , the controller 10 is respectively 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 the above 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 sprayed by the dispensing needle 51 on the area to be printed 61 is substantially consistent. For example, with reference to FIGS. 2-5 , the area to be printed 61 includes a plurality of sub-areas to be printed 611 , and the distance information between the plurality of 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 on 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 611 to be printed.

The technical solution of the embodiment of the present invention is to set a controller 10 so as 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. The electric field between the dispensing needle 51 and the area to be printed 61 can change with the change of the distance information. Different distance information corresponds to different electric fields. 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 the distance information, which is beneficial to reduce the influence of the difference in distance information between each sub-area 611 to be printed 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 the controller 10, it can be determined whether there is a through hole 62 or a defect in the area to be printed 61 according to the determined distance information, and then the glue dispensing needle 51 can be controlled not to 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 mis-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 according to the distance information between the area to be printed 61 of each layer and the glue dispensing needle 51 to make the droplets sprayed by the glue dispensing needle 51 in the areas to be printed 61 of different layers consistent, and there is no need to dispense glue in multiple times according to the number of layers of the area to be printed 61, which is conducive to improving the glue dispensing efficiency. By setting the controller 10 to be able 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, the influence of the difference in distance information between the dispensing needle 51 and each sub-area to be printed 611 of the area to be printed 61 on the substrate to be printed 60 on the dispensing consistency can be reduced. There is no need to control the substrate to be printed 60 or the dispensing needle 51 to move along the Z direction. It is only necessary to control the substrate to be printed 60 to move along the direction of the plane where 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, and it is difficult to control the accuracy of the droplet size, which is conducive to improving the accuracy of dispensing.

On the basis of the above embodiments, referring to Figures 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 is a flow chart of another electrostatic field high-precision array point non-contact dispensing method provided by an embodiment of the present invention. The embodiment shown in Figure 10 describes in detail 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. Referring to Figure 10, the electrostatic field high-precision array point non-contact dispensing method in an embodiment of the present invention includes:

S210, 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.

Exemplarily, referring to FIGS. 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 plurality of 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 value of the distance information between the plurality of 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.

S220. Adjust 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.

Exemplarily, referring to Figures 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 average distance information determined in the above step S210, 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. By setting the controller 10 to be able to adjust 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 with higher accuracy, it is beneficial to improve the accuracy of dispensing, and can further reduce the influence of the flatness of the area to be printed 61 on the substrate to be printed 60 on the consistency of dispensing in the sub-area to be printed 611.

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.

On the basis of the above embodiments, referring to Figures 2-5, the sub-area 611 to be printed on the area 61 to be printed includes a first point to be printed, a second point to be printed, a third point to be printed, a fourth point to be printed and a fifth point to be printed, wherein the first point to be printed, the second point to be printed, the third point to be printed and the fourth point to be printed are located at the edge of the sub-area 611 to be printed, and the fifth point to be printed is located in the area surrounded by the first point to be printed, the second point to be printed, the third point to be printed and the fourth point to be printed. Figure 11 is a flow chart of another electrostatic field high-precision array point contactless dispensing method provided by an embodiment of the present invention. The embodiment shown in Figure 11 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 point to be printed detected by the ranging sensor. Referring to 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 point to be printed detected by the ranging sensor includes:

S211, receiving 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.

Exemplarily, referring to FIGS. 1-5 , the fifth dot to be printed on the sub-region to be printed 611 may be located at the center of the sub-region 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-region to be printed 611, and are located at the upper left, upper right, lower right, and lower left of the fifth dot to be printed, respectively. The controller 10 may 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.

S212. Determine average distance information between the dispensing needle and the sub-area to be printed according to the first distance information, the second distance information, the third distance information, the fourth distance information, and the fifth distance information.

Exemplarily, referring to FIGS. 1-5 , the controller 10 determines the average distance information between the dispensing needle 51 and the sub-area 611 to be printed 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.

On the basis of the above embodiments, referring to Figures 2-5, the area to be printed 61 includes at least two sub-areas to be printed 611. Figure 12 is a flow chart of another electrostatic field high-precision array point non-contact dispensing method provided by an embodiment of the present invention. The embodiment shown in Figure 12 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. Referring to Figure 12, the electrostatic field high-precision array point non-contact dispensing method in an embodiment of the present invention includes:

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.

Exemplarily, referring to FIGS. 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 point to be printed on the current sub-region 611 to be printed, and the point to be printed may be the center of the sub-region 611 to be printed. The controller 10 may use the distance information between the point to be printed located at the center of the sub-region 611 to be printed and the dispensing needle 51 as the distance information between the dispensing needle 51 and the sub-region 611 to be printed.

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.

Referring to Figures 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, so as to ensure that the size of the droplets sprayed by the dispensing needle 51 to the current sub-area 611 to be printed is basically consistent with the size of the droplets on other sub-areas 611 to be printed. The specific adjustment logic can be referred to the above description and will not be repeated here.

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.

Exemplarily, the specific implementation of step S330 is similar to that of step S310 and will not be described again.

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.

Exemplarily, the specific implementation of step S340 is similar to that of step S320 and will not be described in detail herein.

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 611 to be printed, 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 611 to be printed, and controls the mobile platform 70 to move in coordination with the dispensing state of the dispensing device 40 to achieve array dispensing. Compared with the technical solution of first determining the average distance information between the dispensing needle 51 and all the sub-areas 611 to be printed, 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 dispensing device 40 to achieve array dispensing, the dispensing efficiency of the solution of moving, detecting and dispensing in the embodiment of the present invention is higher. Especially when performing array dispensing on the substrate to be printed as shown in Figures 4 and 5, 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, and can directly perform dispensing or not dispensing based on the average distance information between the dispensing needle 51 and the current sub-area 611 to be printed.

On the basis of the above embodiments, FIG. 13 is a flow chart of another electrostatic field high-precision array point non-contact dispensing method provided by an embodiment of the present invention. The embodiment shown in FIG. 13 enriches the process of the electrostatic field high-precision array point non-contact dispensing method. Referring to FIG. 13, the electrostatic field high-precision array point non-contact dispensing method in an embodiment of the present invention includes:

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.

Exemplarily, referring to FIGS. 1-5 , the preset glue dot shape may be the aspect ratio of the droplet sprayed by the glue needle 51 on the to-be-printed area 61. The controller 10 may 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 glue needle 51 and the substrate 60 to be printed, and the viscosity of the droplet in the glue dispenser 50. It is understandable that the liquid contained in the glue dispensing cavity 42 in the glue dispenser 40 may be flux, conductive glue, epoxy resin or adhesive, and 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 large, the controller 10 may appropriately increase the initial pulse signal output by the pulse signal generator 30 and/or the initial adjustment multiple of the transformer 40.

S420, determining the distance information between the dispensing needle and the area to be printed according to the detection information of the distance measuring sensor.

S430: Adjust the initial pulse signal and/or the initial adjustment multiple according to the distance information.

Exemplarily, referring to Figures 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.

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 glue dispensing needle 51 and the substrate 60 to be printed, and the viscosity of the droplet in the glue dispenser 50, and then adjust the initial pulse signal and the initial adjustment multiple according to the distance information between the glue 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 glue 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.

The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An electrostatic field high-precision array point non-contact glue dispensing device, characterized in that it includes a controller, a distance sensor, a pulse signal generator, a transformer and a glue 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 communicatively connected to the distance measuring sensor, the pulse signal generator and the transformer respectively, and is used to determine the distance information between the dispensing needle and the area to be printed on the substrate to be printed according to the detection information of the distance measuring 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 area to be printed. 2. The electrostatic field high-precision array point non-contact glue dispensing device according to claim 1, 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, 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 it 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 end and a second output end; 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 it 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 glue dispensing device according to claim 1, characterized in that the electrostatic field high-precision array point non-contact glue dispensing device further comprises a negative pressure machine, and the negative pressure machine is connected to the glue 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 non-contact dispensing method for 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 non-contact dispensing method for high-precision array points in an electrostatic field comprises: Determine the distance information between the dispensing needle and the area to be printed according to the detection information of 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 to control the electric field between the dispensing needle and the area to be printed. 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, and each of the sub-areas to be printed includes at least two points to be printed; Determining the distance information between the dispensing needle and the to-be-printed area 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: 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. 8. The electrostatic field high-precision array point non-contact dispensing method according to claim 7, characterized in that the sub-area to be printed includes a first point to be printed, a second point to be printed, a third point to be printed, a fourth point to be printed and a fifth point to be printed, wherein the first point to be printed, the second point to be printed, the third point to be printed and the fourth point to be printed are located at the edge of the sub-area to be printed, and the fifth point to be printed is located in the area surrounded by the first point to be printed, the second point to be printed, the third point to be printed and the fourth point to be printed; Determining average distance information between the dispensing needle and the sub-area to be printed according to detection information of each of the to-be-printed points detected by the distance measuring sensor includes: 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; 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. 9. 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 to-be-printed area 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. 10. The electrostatic field high-precision array point non-contact glue dispensing method according to claim 6, characterized in that before determining the distance information between the glue 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 glue dispensing method further comprises: 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 droplet 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: The initial pulse signal and/or the initial adjustment factor are adjusted according to the distance information.