Penetrating Colloid-Based Dispensing Detection Method, System and Device

Abstract

The present invention provides a dispensing detection method, system and device based on a permeable colloid. Among them, the dispensing detection method includes the following steps: Based on the coordinate data of the bottom surface and the surface of the colloid, the coordinate data of the device, and the coordinate data of the backplane plane obtained by spatially scanning the colloid, the device therein, and the backplane where both are located, calculate the actual thickness data of the colloid, the radius data of the area coated by the colloid on the backplane plane, the center coordinate data of the bottom surface and the surface of the colloid, and the center coordinate data of the device; According to the actual thickness data, judge whether the thickness of the colloid meets the requirements; According to the radius data, judge whether the radius of the colloid meets the requirements; According to the center coordinate data, judge whether the center of the colloid and the center of the device are coaxial; Output a visual judgment result. The dispensing detection method based on the permeable colloid of the present invention can replace manual visual inspection, ensure the accuracy of inspection, and improve the inspection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of light-emitting backplane production, and particularly to a dispensing detection method, system and device based on a permeable colloid. Background Art

[0002] A light-emitting backplane includes: a backplane body and LED chips welded to the backplane body. Among them, in order to protect the LED chips, a transparent and highly light-transmissive protective colloid needs to be coated on them. The protective colloid is in a dome-shaped seal to protect the chips inside, which is conducive to improving the temperature and humidity environment adaptability of the light-emitting backplane product, improving the product quality, and extending the product life.

[0003] However, most of the quality verification of the existing protective colloid coating process relies on manual visual inspection of the appearance and power-on light emission inspection, and it is impossible to very accurately screen out whether there are problems with the protective colloid coating. When defective light-emitting products appear, the entire board can only be scrapped, and it is difficult to determine the specific process link where the problem lies, resulting in the inability to optimize the overall process and the difficulty in improving the yield rate. Therefore, in view of the above problems, it is necessary to propose a further solution. Summary of the Invention

[0004] The present invention aims to provide a dispensing detection method, system and device based on a permeable colloid to overcome the deficiencies in the prior art.

[0005] To solve the above technical problems, the technical solution of the present invention is:

[0006] A dispensing detection method based on a permeable colloid, where the permeable colloid is used to encapsulate and protect devices disposed on a backplane plane, and the colloid has a surface and a bottom surface; the dispensing detection method includes the following steps:

[0007] Based on the coordinate data of the bottom surface and the surface of the colloid, the coordinate data of the device, and the coordinate data of the backplane plane obtained by spatially scanning the colloid, the device therein, and the backplane where they are located, calculate the actual thickness data of the colloid, the radius data of the area where the colloid is coated on the backplane plane, the center coordinate data of the bottom surface and the surface of the colloid, and the center coordinate data of the device.

[0008] According to the actual thickness data, judge whether the thickness of the colloid meets the requirements; according to the radius data, judge whether the radius of the colloid meets the requirements; according to the center coordinate data, judge whether the center of the colloid and the center of the device are coaxial; output a visual judgment result.

[0009] As an improvement to the dispensing detection method based on permeable colloid of the present invention, a 3D confocal line scan sensor is used to emit light for spatial scanning, and a receiver is used to receive the reflected light, and the corresponding coordinate data is calculated based on the reflected light.

[0010] As an improvement to the dispensing detection method based on permeable colloid of the present invention, according to the reflection intensity differences caused by the colloid, the device, and the backplane material, the coordinate data of the bottom surface and the surface of the colloid, the coordinate data of the device, and the coordinate data of the backplane plane are separated.

[0011] As an improvement to the dispensing detection method based on permeable colloid of the present invention, the actual thickness data is the coordinate value of the surface of the colloid minus the corresponding coordinate value of the backplane plane.

[0012] As an improvement to the dispensing detection method based on permeable colloid of the present invention, by comparing whether the actual thickness data meets the corresponding thickness threshold, it is judged whether the thickness of the colloid meets the requirements.

[0013] As an improvement to the dispensing detection method based on permeable colloid of the present invention, by comparing whether the radius data meets the corresponding radius threshold, it is judged whether the area of the region covered by the colloid on the backplane plane meets the requirements.

[0014] As an improvement to the dispensing detection method based on permeable colloid of the present invention, judging whether the center of the colloid and the center of the device are coaxially arranged according to the center coordinate data includes:

[0015] Judging whether the center of the surface of the colloid and the center of the device are coaxially arranged according to the center coordinate data of the surface of the colloid and the center coordinate data of the device;

[0016] If they are coaxially arranged, then judging whether the center of the surface of the colloid and the center of the bottom surface of the colloid are coaxially arranged according to the coordinate data of the bottom surface and the surface of the colloid. If they are coaxially arranged, the centering of the colloid meets the requirements;

[0017] If they are not coaxially arranged, then judging whether the center of the surface of the colloid and the center of the bottom surface of the colloid are coaxially arranged according to the coordinate data of the bottom surface and the surface of the colloid. If they are coaxially arranged, the colloid is offset, otherwise the colloid is eccentric.

[0018] As an improvement to the dispensing detection method based on permeable colloid of the present invention, the dispensing detection method further includes: the step of reverse calculating the glue thickness according to the incomplete data of the colloid surface layer and the refraction deformation characteristics of the bottom surface, and complementing the missing data of the four peripheral edges of the colloid surface layer;

[0019] This step includes:

[0020] Based on the central coordinate data of the bottom and surface of the colloid, obtain the observed thickness data of the colloid. Based on the observed thickness data and the actual thickness data, obtain the refractive index of the colloid;

[0021] Based on the deformation amount caused by the refraction of the bottom surface of the colloid, inversely calculate the thickness data of the four peripheral edges of the colloid surface. Based on the thickness data, complete the coordinate data of the four peripheral edges of the colloid surface;

[0022] Based on the completed coordinate data, obtain the divergence of the normal vector of the colloid surface.

[0023] As an improvement to the dispensing detection method based on the permeable colloid of the present invention, the dispensing detection method further includes: detecting the abundance of the colloid;

[0024] This step includes: obtaining the relative abundance data of the colloid based on the effective surface area of the colloid and / or the divergence of the normal vector of the colloid surface. Based on the relative abundance data, determine whether the abundance of the colloid meets the requirements;

[0025] When determining whether the abundance of the colloid meets the requirements, set an abundance threshold, and determine whether the abundance of the colloid meets the requirements by comparing whether the relative abundance data meets the corresponding abundance threshold.

[0026] To solve the above technical problems, the technical solution of the present invention is:

[0027] A dispensing detection system based on a permeable colloid, which includes:

[0028] A memory, which is used to store executable instructions; and

[0029] A processor, which is used to be connected to the memory to execute the executable instructions so as to execute the dispensing detection method as described above.

[0030] To solve the above technical problems, the technical solution of the present invention is:

[0031] A dispensing detection device based on a permeable colloid, where the permeable colloid is used to encapsulate and protect the devices arranged on the backplane plane, and the colloid has a surface and a bottom surface; the dispensing detection device includes: a motion module, a 3D scanning module, and a measurement module;

[0032] The 3D scanning module is driven by the motion module to perform a spatial scan on the colloid, the devices therein, and the backplane where they are located, and feed back the coordinate data of the bottom and surface of the colloid, the coordinate data of the devices, and the coordinate data of the backplane plane to the measurement module;

[0033] The measurement module includes a calculation unit and a judgment unit;

[0034] The calculation unit calculates the actual thickness data of the colloid, the radius data of the area coated with the colloid on the backplane plane, the central coordinate data of the bottom and surface of the colloid, and the central coordinate data of the device according to the feedback data;

[0035] The judgment unit judges whether the thickness of the colloid meets the requirements according to the actual thickness data; judges whether the radius of the colloid meets the requirements according to the radius data; judges whether the center of the colloid is coaxial with the center of the device according to the central coordinate data; and outputs a visual judgment result.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] The dispensing detection method based on the permeable colloid of the present invention can replace manual observation inspection, ensure the inspection accuracy, and improve the inspection efficiency.

[0038] The dispensing detection method based on the permeable colloid of the present invention can accurately obtain two sets of data on the surface and bottom of the transparent colloid, and innovatively solve the reflection angle defect existing in the 3D line scan principle by using the "refraction deformation error" characteristic of the colloid bottom caused by the refraction of the structured light by the transparent colloid, and solve the measurement problem brought by the inability to completely scan the dome-shaped colloid from the principle of 3D line scan, thereby solving the problem of poor adaptability of 3D line scan to special-shaped transparent protective glue.

[0039] The dispensing detection method based on the permeable colloid of the present invention uses two sets of data on the surface and bottom of the transparent colloid and the refraction characteristics to obtain the refractive index of the colloid, and then inversely deduces information such as the radius of the colloid coating, the center position of the bottom surface, the center position of the highest point, and the abundance of the colloid through the refraction amount of the bottom surface data of the colloid, so as to realize the detection of NG in colloid thickness, radius, eccentricity, deviation, and abundance.

[0040] The dispensing detection method based on the permeable colloid of the present invention can accurately determine whether the process link of the protective glue meets the standard in multiple aspects by detecting NG in colloid thickness, radius, eccentricity, deviation, and abundance, assist in optimizing the protective glue coating process, and also indirectly provide verification data for optimizing other process links such as LED chip soldering. Description of the Drawings

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0042] Figure 1Schematic diagram of thickness detection in an embodiment of the dispensing detection method based on a permeable colloid according to the present invention;

[0043] Figure 2 Schematic diagram of radius detection in an embodiment of the dispensing detection method based on a permeable colloid according to the present invention;

[0044] Figure 3 Schematic diagram of eccentricity detection in an embodiment of the dispensing detection method based on a permeable colloid according to the present invention;

[0045] Figure 4 Schematic diagram of deviation detection in an embodiment of the dispensing detection method based on a permeable colloid according to the present invention;

[0046] Figure 5 Schematic diagram of abundance detection in an embodiment of the dispensing detection method based on a permeable colloid according to the present invention;

[0047] Figure 6 Schematic diagram of abundance detection by means of the effective surface area parameter of the colloid in an embodiment of the dispensing detection method based on a permeable colloid according to the present invention;

[0048] Figure 7 Schematic diagram of refractive index calculation in an embodiment of the dispensing detection method based on a permeable colloid according to the present invention;

[0049] Figure 8 、 9 Schematic diagram of complementing edge coordinate data in an embodiment of the dispensing detection method based on a permeable colloid according to the present invention. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0051] An embodiment of the present invention provides a dispensing detection method based on a permeable colloid, which is applicable to the dispensing detection of a light-emitting backplane. In this embodiment, the dispensed colloid is a highly permeable colloid, and the highly permeable colloid is in a dome-shaped seal, which is used to encapsulate and protect the light-emitting devices arranged on the backplane plane. The dispensing detection method based on a permeable colloid in this embodiment can detect the thickness NG, radius NG, eccentricity NG, deviation NG, and abundance NG of the above-mentioned colloid.

[0052] Such as Figure 1As shown, the thickness detection of the above-mentioned colloid means that by measuring the actual thickness of the colloid and comparing the actual thickness with the corresponding thickness threshold, it is further determined whether the thickness parameter of the colloid meets the corresponding requirements. Since the colloid is in a dome shape, the actual thickness refers to the thickness values of each point of the colloid within the covered area.

[0053] As Figure 2 shown, the radius detection of the above-mentioned colloid means that by measuring the radius of the area covered by the colloid and comparing the radius with the corresponding radius threshold, it is further determined whether the area covered by the colloid meets the corresponding requirements.

[0054] As Figure 3 shown, the eccentricity detection of the above-mentioned colloid means that by measuring the center position of the highest point of the colloid and comparing the center position with the center position of the device and the center position of the bottom surface of the colloid. If the center position of the highest point is not coaxial with the center position of the device and the center position of the bottom surface of the colloid, it indicates that the colloid has an eccentricity problem.

[0055] As Figure 4 shown, the deviation detection of the above-mentioned colloid means that by measuring the center position of the highest point of the colloid and comparing the center position with the center position of the device and the center position of the bottom surface of the colloid. If the center position of the highest point is not coaxial with the center position of the device but is coaxial with the center position of the bottom surface of the colloid, it indicates that the colloid has a deviation problem.

[0056] As Figure 5 shown, the abundance detection of the above-mentioned colloid means the size of the surface area of the colloid under the condition that the area and thickness covered by the colloid are certain.

[0057] Specifically, due to the fluidity and surface tension characteristics of the colloid, it will maintain a dome shape for a period of time after coating, but the arc formed by the dome may be different under different viscosities and curing times. In this way, the lens effects formed by the colloid will be different, and ultimately may lead to product inconsistency.

[0058] For standard colloids with higher viscosity and shorter curing intervals, compared with NG colloids with lower viscosity, although the radius and thickness are the same, more glue is coated, the shape is fuller, and the slope near the surface center is gentler. Therefore, the abundance of the standard colloid is defined to be greater than that of the NG colloid.

[0059] Thus, through the detection of colloid thickness NG, radius NG, eccentricity NG, deviation NG, and abundance NG, it can accurately determine in multiple aspects whether the protective glue process link meets the standards, assist in optimizing the protective glue coating process, and also indirectly provide verification data for the optimization of other process links such as the welding of light-emitting devices.

[0060] The dispensing detection method based on a permeable colloid in this embodiment includes the following steps:

[0061] S1. Based on the coordinate data of the bottom and surface of the colloid, the coordinate data of the device, and the coordinate data of the backplane plane obtained by spatially scanning the colloid, the device therein, and the backplane on which they are located.

[0062] In this step, a 3D confocal line scan sensor can be used to emit light for spatial scanning, and a receiver is used to receive the reflected light, and the corresponding coordinate data is calculated based on the reflected light. Compared with using an ordinary line scan sensor, using a 3D confocal line scan sensor can scan multi-layer data in a transparent medium, thereby meeting the requirements of the dispensing detection method based on a permeable colloid in this embodiment. In one implementation, the receiver can be a camera, and the camera is further connected to a processor responsible for data processing and calculation. In this way, by using a 3D confocal line scan sensor, the coordinate data of the bottom and surface of the colloid, the coordinate data of the device, and the coordinate data of the backplane plane can be separated according to the difference in reflection intensity caused by the colloid, the device, and the backplane material by utilizing the characteristic that its structured light is a continuous spectrum.

[0063] Specifically, the principle of calculating the corresponding coordinate data based on the reflected light and separating different coordinate data is as follows:

[0064] In the field of view of the sensor receiving lens, different shapes shown by the structured light projected on the measured object can be received, so that the cross-sectional shape of the measured object in this frame can be calculated according to the shape and the inclination angle of the receiver. The difference is that since the confocal sensor emits colored structured light, the colors of the structured light shown at different levels after passing through the transparent medium are different. Therefore, the receiver can distinguish different levels through the different colors of the structured light, and multi-color structured light at different levels is collected for each frame to obtain multi-layer data of different media. Thus, based on the above multi-layer data, the coordinate data of different target objects can be obtained.

[0065] Furthermore, the reflection intensity is obtained by converting the brightness of the received structured light. Generally, the reflection intensity of a metal electrode is very high, and the reflection intensity of a transparent medium is relatively low. Accordingly, the intensity is linearly mapped to 0 - 255 according to the original magnitude value range. The reflection intensity of the metal electrode part is above 200, the transparent part is below 100 in intensity, and the intensity of the non-transparent part of the backplane is around 150. Therefore, from the intensity screening combination and spatial geometric information, the data of the backplane plane and the device encapsulated in the colloid can be separated.

[0066] In addition, it should be noted that due to the emission and reflection principle of 3D line scan structured light, the inclination angle of a local area on the upper surface of the colloid (specifically, the area around the four edges of the colloid) is relatively large, forming a blind area, resulting in the structured light reflected from the colloid surface layer in the area being unable to enter the receiver. Thus, the coordinate data of the colloid surface obtained lacks the coordinate data of the four edges.

[0067] S2. Calculate the actual thickness data of the colloid, the radius data of the area coated by the colloid on the backplane plane, the central coordinate data of the bottom and surface of the colloid, and the central coordinate data of the device.

[0068] In this step, by calculating the actual thickness data of the colloid, it is used for thickness detection of the colloid. By calculating the radius data of the colloid, it is used for detecting the area covered by the colloid. By calculating the central coordinate data of the colloid and the device, it is used for detecting the centrality of the colloid.

[0069] It should be noted that the actual thickness data is the z - coordinate value of the highest point on the surface of the colloid minus the z - coordinate value of the corresponding position on the backplane plane. The so - called "actual thickness" is distinguished from the "observed thickness". Because, due to the refraction phenomenon, the scanned data of the bottom surface of the colloid will have a convex deformation, and the "observed thickness" of the colloid can be obtained by calculating the z - coordinate difference between the center of the surface of the colloid and the center of the deformed bottom layer.

[0070] S3. According to the actual thickness data, judge whether the thickness of the colloid meets the requirements.

[0071] Specifically, a thickness threshold can be set. By comparing whether the actual thickness data meets the corresponding thickness threshold, it is judged whether the thickness of the colloid meets the requirements. That is, when the actual thickness of the colloid is within the range of the thickness threshold, the actual thickness of the colloid meets the requirements. In this way, problems of the colloid being too thick or too thin can be detected.

[0072] S4. According to the radius data, judge whether the radius of the colloid meets the requirements.

[0073] Specifically, a radius threshold can be set. By comparing whether the calculated radius value meets the corresponding radius threshold, it is judged whether the area covered by the colloid meets the requirements. That is, when the radius of the area covered by the colloid on the backplane plane is within the range of the radius threshold, the area covered by the colloid meets the requirements.

[0074] S5. According to the central coordinate data, judge whether the center of the colloid and the center of the device are coaxial.

[0075] As mentioned above, the coordinate data of the surface of the obtained colloid lacks the coordinate data of the four - week edges. Thus, in this step, the coordinate data of the surface of the colloid is the data of the colloid before defect repair. Since the angle is gentle and the shape is symmetric near the highest point on the surface of the colloid, the center of the defective upper surface is the geometric highest point of the colloid.

[0076] Specifically, since the detection of the centrality of the colloid involves the detection of two items: eccentricity and deviation, step S5 includes:

[0077] S51. Determine whether the center of the colloid surface is coaxial with the center of the device according to the central coordinate data of the colloid surface and the central coordinate data of the device.

[0078] S52. If they are coaxial, then determine whether the central point of the colloid surface is coaxial with the central point of the bottom surface according to the coordinate data of the bottom surface and the surface of the colloid. If they are coaxial, the centricity of the colloid meets the requirements.

[0079] S53. If they are not coaxial, then determine whether the central point of the colloid surface is coaxial with the central point of the bottom surface according to the coordinate data of the bottom surface and the surface of the colloid. If they are coaxial, the colloid is offset; otherwise, the colloid is eccentric.

[0080] The above steps S3, S4, and S5 can be carried out sequentially, or synchronously, or in other orders. In this embodiment, the order of steps S3, S4, and S5 is not limited.

[0081] The dispensing detection method based on the permeable colloid in this embodiment further includes the step of inversely calculating the glue thickness at each place according to the incomplete data of the colloid surface layer and the refractive deformation characteristics of the bottom surface, and complementing the missing data at the four peripheral edges of the colloid surface layer, so as to facilitate subsequent calculation of the abundance value of the colloid according to the actual surface condition of the colloid. This method of calculating the abundance value of the colloid has higher accuracy compared with the method of scanning multiple times with multiple sensors or one sensor for splicing, and can thus avoid the splicing error problem.

[0082] Specifically, the divergence of the normal vector of the colloid surface is calculated as follows:

[0083] S61. Obtain the observed thickness data of the colloid according to the central coordinate data of the bottom surface and the surface of the colloid, and obtain the refractive index of the colloid according to the observed thickness data and the actual thickness data.

[0084] S62. Obtain the thickness data of the four peripheral edges of the colloid surface according to the deformation caused by the refraction of the colloid bottom surface, and complement the coordinate data of the four peripheral edges of the colloid surface according to the thickness data.

[0085] Through steps S61 and S62, the reflection angle defect existing in the 3D line scan principle can be solved, the measurement problem caused by the fact that the 3D line scan cannot completely scan the dome-shaped colloid in principle can be solved, and thus the problem that the 3D line scan has poor adaptability to the special-shaped transparent protective glue can be solved.

[0086] As Figure 7 shown, according to the highest point Top and the lowest points B and C (the edges measured at the bottom surface) of the colloid, calculate the distance between Top and the straight line BC to obtain the true thickness H at the Top point.

[0087] Based on the XY position of the highest point Top, find the bottom surface position A directly below it (if there is a device occlusion, the positions on both sides can be used for calculation), calculate the distance from Top to A, and obtain the observed glue thickness h. Then the refractive index = H / h.

[0088] As Figure 8 , 9 shown, calculate the distance d from one point on the bottom surface of the deformed colloid to the actual backplane plane BC; assume the actual thickness of the colloid at this point is D, then the refractive index = D / (D - d);

[0089] Thus, according to H / h = D / (D - d), then D = H*d / (H - h), which is the actual glue thickness at this position.

[0090] Calculate other points on the bottom surface in sequence to obtain the completed coordinate data of the colloid surface.

[0091] S63. According to the completed coordinate data, obtain the divergence of the normal vector of the colloid surface.

[0092] Specifically, based on the completed coordinate data, reconstruct the three-dimensional surface formed by the colloid. According to the reconstructed three-dimensional surface, calculate the normal vectors of each point on the surface. Thus, according to the obtained normal vectors, the divergence of the corresponding normal vectors can be further calculated, and in this way, the divergence of the normal vector of the colloid surface can be obtained.

[0093] When it is detected through steps S3, S4, and S5 that the thickness, coverage area, and centrality of the colloid meet the requirements, the dispensing detection method for the permeable colloid in this embodiment further includes:

[0094] S7. Detect the abundance of the colloid.

[0095] Step S7 specifically includes: obtaining the relative abundance data of the colloid according to the effective surface area of the colloid and / or the divergence of the normal vector of the colloid surface, and judging whether the abundance of the colloid meets the requirements according to the relative abundance data.

[0096] In this step, the abundance value of the colloid can be characterized and calculated according to the effective surface area of the colloid and the divergence of the surface normal vector. Among them, the effective surface area of the colloid does not consider the surface defects existing during spatial scanning, and it can be relatively characterized by the number of 3D points obtained by scanning to represent the surface abundance of the colloid.

[0097] Thus, with the help of the effective surface area parameter of the colloid, it has the advantage of a wide application range. As Figure 6 shown, when scanning the colloid, compared with the NG colloid, the surface abundance of the standard colloid is relatively flat, and the effective area that can be scanned is larger, indicating that its abundance meets the corresponding requirements.

[0098] Furthermore, the abundance of the colloid can be statistically analyzed based on the divergence of the normal vector of the colloid surface calculated as above. The principle lies in that: the divergence of the normal vector of the colloid surface is a scalar, which can be used to statistically analyze the degree of centripetal convergence of all the normal vectors of the colloid surface. Thus, if the vectors show a converging state, the divergence is less than 0. If they show a diverging state, the divergence is greater than 0.

[0099] Since the divergence of the normal vector of a complete closed surface is 0, the surface of the colloid can be regarded as a local area of a closed surface. The divergence of its normal vector is negative. However, generally speaking, the colloid with a larger abundance has a greater surface curvature. At the same radius, it is closer to a closed surface than the colloid with a lower abundance, and the calculated divergence is closer to 0. While the colloid with a smaller abundance has a smaller surface curvature and can be regarded as a smaller part of the closed surface, and the divergence of its surface normal vector is a smaller negative value. Therefore, the divergence of the surface normal vector of the colloid with a larger abundance will be larger. Accordingly, the surface abundance of the colloid can be relatively characterized based on the divergence of the surface normal vector of the colloid.

[0100] When judging whether the abundance of the colloid meets the requirements, an abundance threshold can be set. By comparing whether the relative abundance data meets the corresponding abundance threshold, it can be further judged whether the abundance of the colloid meets the requirements. That is, when the relative abundance of the colloid is within the range of the abundance threshold, the abundance of the colloid meets the requirements.

[0101] S8. Output the visualized judgment result.

[0102] Through the detection of the above steps, the detection of the colloid thickness NG, radius NG, eccentricity NG, deviation NG, and abundance NG can be realized. And the corresponding results are output in a visualized manner to accurately determine whether the protective colloid process link meets the standards, assist in optimizing the protective colloid coating process, and also indirectly provide verification data for the optimization of other process links such as LED chip soldering.

[0103] Based on the same inventive concept, another embodiment of the present invention further provides a dispensing detection system, which includes:

[0104] A memory, which is used to store executable instructions; and

[0105] A processor, which is used to be connected to the memory to execute the executable instructions so as to execute the dispensing detection method based on the permeable colloid as described in the above embodiment.

[0106] Among them, the memory can be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electric Erasable Programmable Read-Only Memory (EEPROM), etc. Among them, the memory is used to store a program, and after receiving an execution instruction, the processor executes the program.

[0107] The processor can be an integrated circuit chip with the ability to process signals. The above-mentioned processor can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0108] Based on the same inventive concept, another embodiment of the present invention also provides a dispensing detection device.

[0109] In this embodiment, the dispensed glue is a highly permeable colloid, and the highly permeable colloid is used to encapsulate and protect the devices disposed on the backplane plane. The colloid has a surface and a bottom surface.

[0110] The dispensing detection device in this embodiment includes: a motion module, a 3D scanning module, and a measurement module.

[0111] Among them, the 3D scanning module is driven by the motion module to perform a spatial scan of the colloid, the devices therein, and the backplane where they are located, and feedback the coordinate data of the bottom surface and the surface of the colloid, the coordinate data of the devices, and the coordinate data of the backplane plane to the measurement module.

[0112] The above-mentioned 3D scanning module is specifically a 3D confocal line scan sensor. By utilizing the characteristic that its structured light is a continuous spectrum, according to the reflection intensity differences caused by the colloid, the devices, and the backplane material, the coordinate data of the bottom surface and the surface of the colloid, the coordinate data of the devices, and the coordinate data of the backplane plane can be separated.

[0113] The above-mentioned motion module drive can be an X, Y, Z three-axis motion platform to control the 3D scanning module to perform three-dimensional motion in space.

[0114] The measurement module is connected to a camera capable of receiving the optical signal of the 3D confocal line scan sensor, and includes a calculation unit and a judgment unit.

[0115] Specifically, the calculation unit calculates the actual thickness data of the colloid, the radius data of the area coated with the colloid on the backplane plane, the center coordinate data of the bottom and surface of the colloid, and the center coordinate data of the device according to the feedback data.

[0116] The judgment unit judges whether the thickness of the colloid meets the requirements according to the actual thickness data; judges whether the radius of the colloid meets the requirements according to the radius data; judges whether the center of the colloid is coaxial with the center of the device according to the center coordinate data; and outputs a visual judgment result.

[0117] When the dispensing detection device of this embodiment works, the light-emitting backplane (different sizes of light guide plates require corresponding fixtures) is placed on the feeding and fixing fixture, and then the product stage adsorbs and fixes the product, and at the same time, the 3D confocal line scan sensor moves to the pre-scanning position.

[0118] Then, the X, Y, and Z axis motion platforms drive the 3D confocal line scan sensor to move to the scanning position and execute the scanning process. At the same time, the measurement module will automatically calculate and detect the data after the scanning is completed. When all the detection areas are scanned and calculated, the visualization terminal will automatically display the detection result.

[0119] In summary, the dispensing detection method based on the permeable colloid of the present invention can replace manual visual inspection, ensure the accuracy of inspection, and improve the inspection efficiency.

[0120] The dispensing detection method based on the permeable colloid of the present invention can accurately obtain two sets of data on the surface and bottom of the transparent colloid, and use the "refraction deformation error" characteristic of the bottom of the colloid caused by the refraction effect of the transparent colloid on the structured light to innovatively solve the reflection angle defect existing in the 3D line scan principle, solve the measurement problem brought by the fact that the 3D line scan cannot completely scan the dome-shaped colloid from the principle, and thus solve the problem of poor adaptability of the 3D line scan to the special-shaped transparent protective colloid.

[0121] The dispensing detection method based on the permeable colloid of the present invention uses two sets of data on the surface and bottom of the transparent colloid and the refraction characteristics to obtain the refractive index of the colloid, and then inversely deduces information such as the radius of the colloid coating, the center position of the bottom surface, the center position of the highest point, and the abundance of the colloid through the refraction amount of the bottom surface data of the colloid, so as to realize the detection of NG in colloid thickness, radius, eccentricity, deviation, and abundance.

[0122] The dispensing detection method based on permeable colloid of the present invention can accurately determine whether the protective colloid process link meets the standards in multiple aspects by detecting the colloid thickness NG, radius NG, eccentricity NG, displacement NG, and abundance NG, assist in optimizing the protective colloid coating process, and also indirectly provide verification data for optimizing other process links such as LED chip soldering.

[0123] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0124] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dispensing detection method based on a permeable colloid, where the permeable colloid is used to encapsulate and protect a device disposed on a backplane plane, and the colloid has a surface and a bottom surface; it is characterized in that, The dispensing detection method includes the following steps: Based on the coordinate data of the bottom surface and the surface of the colloid, the coordinate data of the device, and the coordinate data of the backplane plane obtained by spatially scanning the colloid, the device therein, and the backplane where they are located, calculate the actual thickness data of the colloid, the radius data of the area coated by the colloid on the backplane plane, the center coordinate data of the bottom surface and the surface of the colloid, and the center coordinate data of the device; According to the actual thickness data, judge whether the thickness of the colloid meets the requirements; according to the radius data, judge whether the radius of the colloid meets the requirements; according to the center coordinate data, judge whether the center of the colloid and the center of the device are coaxial; Output the visual judgment result; The dispensing detection method further includes: a step of inversely calculating the glue thickness according to the incomplete data on the surface layer of the colloid and the refractive deformation characteristics of the bottom surface, and complementing the missing data on the four peripheries of the surface layer of the colloid; This step includes: Obtain the observed thickness data of the colloid according to the center coordinate data of the bottom surface and the surface of the colloid, and obtain the refractive index of the colloid according to the observed thickness data and the actual thickness data; Inverse calculate the thickness data of the four peripheries of the surface of the colloid according to the deformation amount caused by the refraction of the bottom surface of the colloid, and complement the coordinate data of the four peripheries of the surface of the colloid according to the thickness data; Obtain the divergence of the normal vector of the surface of the colloid according to the complemented coordinate data.

2. The dispensing detection method based on a permeable colloid according to claim 1, characterized in that, Use a 3D confocal line scan sensor to emit light for spatial scanning, use a receiver to receive the reflected light, and calculate the corresponding coordinate data according to the reflected light.

3. The dispensing detection method based on a permeable colloid according to claim 2, characterized in that, Separate the coordinate data of the bottom surface and the surface of the colloid, the coordinate data of the device, and the coordinate data of the backplane plane according to the difference in reflection intensity caused by the colloid, the device, and the backplane material.

4. The dispensing detection method based on a permeable colloid according to claim 1, characterized in that, The actual thickness data is the coordinate value of the surface of the colloid minus the corresponding coordinate value of the backplane plane.

5. The dispensing detection method based on a permeable colloid according to claim 1 or 4, characterized in that, Judge whether the thickness of the colloid meets the requirements by comparing whether the actual thickness data meets the corresponding thickness threshold.

6. The dispensing detection method based on a permeable colloid according to claim 1, characterized in that, Judge whether the area of the region covered by the colloid on the backplane plane meets the requirements by comparing whether the radius data meets the corresponding radius threshold.

7. The dispensing detection method based on a permeable colloid according to claim 1, characterized in that, Judging whether the center of the colloid and the center of the device are coaxially arranged according to the center coordinate data includes: Judge whether the center of the surface of the colloid and the center of the device are coaxial according to the center coordinate data of the surface of the colloid and the center coordinate data of the device; If the center of the surface of the colloid and the center of the device are coaxial, then judge whether the center of the surface of the colloid and the center of the bottom surface are coaxial according to the coordinate data of the bottom surface and the surface of the colloid. If the center of the surface of the colloid and the center of the bottom surface are coaxial, then the centering of the colloid meets the requirements; If the center of the surface of the colloid and the center of the device are not coaxial, then judge whether the center of the surface of the colloid and the center of the bottom surface are coaxial according to the coordinate data of the bottom surface and the surface of the colloid. If the center of the surface of the colloid and the center of the bottom surface are coaxial, then the colloid is offset, otherwise the colloid is eccentric.

8. The dispensing detection method based on a permeable colloid according to claim 1, characterized in that, The dispensing detection method further includes: detecting the abundance of the colloid; This step includes: obtaining relative abundance data of the colloid according to the effective surface area of the colloid and / or the divergence of the normal vector of the colloid surface, and judging whether the abundance of the colloid meets the requirements according to the relative abundance data; When judging whether the abundance of the colloid meets the requirements, an abundance threshold is set, and whether the abundance of the colloid meets the requirements is judged by comparing whether the relative abundance data meets the corresponding abundance threshold.

9. A dispensing detection system based on a permeable colloid, characterized in that, The dispensing detection system includes: a memory for storing executable instructions; and a processor for connecting to the memory to execute the executable instructions so as to execute the dispensing detection method according to any one of claims 1 to 8.

10. A dispensing detection device based on a permeable colloid, where the permeable colloid is used to encapsulate and protect a device disposed on a backplane plane, and the colloid has a surface and a bottom surface; it is characterized in that, The dispensing detection device includes: a motion module, a 3D scanning module and a measurement module; The 3D scanning module is driven by the motion module to perform a spatial scan on the colloid, the device therein, and the backplane where both are located, and feed back the coordinate data of the bottom surface and the surface of the colloid, the coordinate data of the device, and the coordinate data of the backplane plane to the measurement module; The measurement module includes a calculation unit and a judgment unit; The calculation unit calculates the actual thickness data of the colloid, the radius data of the area coated by the colloid on the backplane plane, the center coordinate data of the bottom surface and the surface of the colloid, and the center coordinate data of the device according to the feedback data; The judgment unit judges whether the thickness of the colloid meets the requirements according to the actual thickness data; judges whether the radius of the colloid meets the requirements according to the radius data; judges whether the center of the colloid and the center of the device are coaxial according to the center coordinate data; and outputs a visual judgment result; The dispensing detection device based on the permeable colloid is further configured to: inversely calculate the glue thickness according to the incomplete data on the surface layer of the colloid and the refractive deformation characteristics of the bottom surface, and complete the missing data on the four peripheral edges of the surface layer of the colloid; At this time, the dispensing detection device based on the permeable colloid obtains the observed thickness data of the colloid according to the center coordinate data of the bottom surface and the surface of the colloid, obtains the refractive index of the colloid according to the observed thickness data and the actual thickness data; inversely calculates the thickness data of the four peripheral edges of the surface of the colloid according to the deformation amount caused by the refraction of the bottom surface of the colloid, completes the coordinate data of the four peripheral edges of the surface of the colloid according to the thickness data; and obtains the divergence of the normal vector of the surface of the colloid according to the completed coordinate data.

Images