Dispensing apparatus and method

Abstract

This invention discloses a dispensing apparatus and method. The dispensing apparatus includes a dispensing head, a first moving platform for supporting an image sensor, and a controller. The controller is used to acquire first position information of the first moving platform in the thickness direction of the image sensor when the first image sensor and lens complete active alignment. The controller is also used to acquire second position information of the first moving platform in the thickness direction of the image sensor when a second image sensor and lens complete active alignment. The controller is further used to determine dispensing height compensation information based on the first and second position information, and to control the distance between the surface of the second image sensor near the dispensing head and the dispensing head based on the dispensing height compensation information. The controller is also used to control the dispensing head to dispense adhesive onto the surface of the second image sensor near the dispensing head after the first moving platform stops moving. This invention can improve the consistency of adhesive applied to different image sensors.

Description

Technical Field

[0001] This invention relates to the field of camera module manufacturing technology, and in particular to a dispensing device and method. Background Technology

[0002] To meet the high demands for large apertures, wide field of view, and high resolution in camera modules, an AA (Active Alignment) process is introduced during the assembly of the image sensor and lens. The AA process effectively calibrates flatness and optical center deviation, improving the image quality of the camera module. Understandably, during the assembly of the image sensor and lens, the thickness of the adhesive used to bond the lens and image sensor needs to be strictly controlled. Inconsistent adhesive thickness within the same batch of camera modules will severely impact the yield rate of that batch.

[0003] However, current adhesive application methods are mainly as follows: First, the height of the moving platform where the image sensor is located is recorded when adhesive is applied to the first image sensor. After automated production begins, with the dispensing head fixed to the bracket and not moving, adhesive application is performed when the height of the moving platform is the recorded height. However, when there are significant differences in the thickness of different image sensors, this method causes a large deviation in the distance between the dispensing head and the surface of the image sensor to be coated. This results in inconsistent adhesive height and width on different image sensors, leading to poor coating consistency. Summary of the Invention

[0004] This invention provides a dispensing device and method to solve the problem of poor consistency of adhesive applied to different image sensors during the assembly of image sensors and lenses.

[0005] In a first aspect, embodiments of the present invention provide a dispensing device, including: a dispensing head, a stage, a first moving platform, and a controller; The platform is mounted on the first mobile platform and is used to support the first image sensor and a plurality of second image sensors. The controller is communicatively connected to the first mobile platform and is used to control the first mobile platform to move after the first image sensor is placed on the first mobile platform, so that the first image sensor and the lens can be actively aligned, and to obtain the first position information of the first mobile platform in the thickness direction of the image sensor at this time. The controller is also configured to control the first moving platform to move after the second image sensor is placed on the first moving platform, so that the second image sensor and the lens can be actively aligned, and to obtain the second position information of the first moving platform in the thickness direction of the image sensor at this time. The controller is further configured to determine dispensing height compensation information based on the first position information and the second position information, and control the distance between the surface of the second image sensor near the dispensing head and the dispensing head based on the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range. The controller is also communicatively connected to the dispensing head and is further configured to control the dispensing head to dispense adhesive onto the surface of the second image sensor near the dispensing head after the first moving platform stops moving.

[0006] Optionally, the controller is configured to control the first moving platform to move along the thickness direction of the image sensor according to the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

[0007] Optionally, it also includes a second mobile platform; the dispensing head is fixed on the second mobile platform; The controller is also communicatively connected to the second mobile platform and is used to control the second mobile platform to move along the thickness direction of the image sensor according to the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

[0008] Optionally, after the first image sensor and the lens complete active alignment, the image output by the first image sensor has a preset resolution. After the second image sensor and the lens are actively aligned, the image output by the second image sensor has the desired sharpness.

[0009] Optionally, the distance between the surface of the second image sensor near the dispensing head and the dispensing head is the same as the distance between the surface of the first image sensor near the dispensing head and the dispensing head.

[0010] Optionally, the first mobile platform includes a first driver, a second driver, a third driver, a first slide rail, a second slide rail, and a third slide rail; The controller is communicatively connected to the first driver and is used to control the first driver to drive the stage to move along the first direction on the first slide rail. The controller is communicatively connected to the second driver and is used to control the second driver to drive the stage to move along the second direction on the second slide rail; The controller is communicatively connected to the third driver and is used to control the third driver to drive the stage to move along a third direction on the third slide rail; The first direction, the second direction, and the third direction all intersect, and the third direction is the thickness direction of the image sensor.

[0011] Optionally, the second mobile platform includes a fourth drive and a fourth slide rail; The controller is communicatively connected to the fourth driver and is used to control the fourth driver to drive the dispensing head to move along a third direction on the fourth slide rail, the third direction being the thickness direction of the image sensor.

[0012] In a second aspect, embodiments of the present invention provide a dispensing method applied to the dispensing apparatus described in the first aspect, the dispensing method comprising: After the first image sensor is placed on the first moving platform, the first moving platform is controlled to move so that the first image sensor and the lens are actively aligned, and the first position information of the first moving platform in the thickness direction of the image sensor is obtained at this time. After the second image sensor is placed on the first moving platform, the first moving platform is controlled to move so that the second image sensor and the lens are actively aligned, and the second position information of the first moving platform in the thickness direction of the image sensor is obtained at this time. Based on the first position information and the second position information, dispensing height compensation information is determined, and based on the dispensing height compensation information, the distance between the surface of the second image sensor near the dispensing head and the dispensing head is controlled, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range. After the first mobile platform stops moving, the dispensing head is controlled to dispense adhesive onto the surface of the second image sensor near the dispensing head.

[0013] Optionally, the distance between the surface of the second image sensor near the dispensing head and the dispensing head is controlled according to the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range, including: Based on the dispensing height compensation information, the first moving platform is controlled to move along the thickness direction of the image sensor, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

[0014] Optionally, the distance between the surface of the second image sensor near the dispensing head and the dispensing head is controlled according to the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range, including: According to the dispensing height compensation information, the second moving platform connected to the dispensing head is controlled to move along the thickness direction of the image sensor, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

[0015] The technical solution of this invention utilizes the characteristic that after the image sensor and lens complete active alignment, the distance between the surface of the image sensor near the dispensing head and the lens is almost the same. First, it acquires the first position information of the first moving platform in the thickness direction of the image sensor after the first image sensor and lens complete active alignment, and uses this first position information as a reference. Then, after acquiring the second position information of the first moving platform in the thickness direction of the image sensor after each second image sensor and lens completes active alignment, it compares the second position information with the first position information to obtain dispensing height compensation information. It can be understood that this dispensing height compensation information is determined by... The inconsistency in thickness between the second and first image sensors is the cause of the problem. Therefore, by first controlling the distance between the surface of the second image sensor closest to the dispensing head and the dispensing head based on the dispensing height compensation information, the distance between the surface of the second image sensor closest to the dispensing head and the dispensing head can be made consistent with the distance between the surface of the first image sensor closest to the dispensing head and the dispensing head. Then, by controlling the dispensing device, the dispensing height of each second image sensor can be consistent with the dispensing height of the first image sensor. This can overcome the impact of inconsistent image sensor thickness on the consistency of adhesive coating and improve the consistency of adhesive coating on different image sensors.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a dispensing device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of another dispensing device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a first mobile platform provided in an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a platform provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a second mobile platform provided in an embodiment of the present invention; Figure 6 A flowchart of a dispensing method provided in an embodiment of the present invention; Figure 7 A flowchart of another dispensing method provided in an embodiment of the present invention; Figure 8 This is a flowchart of another dispensing method provided in an embodiment of the present invention. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings and are only used to describe the relative positional relationships between components or constituent parts, and do not specifically limit the specific installation orientation of each component or constituent part.

[0021] Figure 1 This is a schematic diagram of a dispensing device provided in an embodiment of the present invention, with reference to... Figure 1 The dispensing device of this invention includes: a dispensing head 10, a stage 20, a first moving platform 30, and a controller 40; the stage 20 is disposed on the first moving platform 30 and is used to support a first image sensor 11 and a plurality of second image sensors 12; the controller 40 is communicatively connected to the first moving platform 30 and is used to control the first moving platform 30 to move after the first image sensor 11 is placed on the first moving platform 30, so that the first image sensor 11 and the lens 21 complete active alignment, and to acquire the first position information of the first moving platform 30 in the thickness direction of the image sensor at this time; the controller 40 is also used to control the first moving platform 30 to move after the second image sensor 12 is placed on the first moving platform 30, so that the second image sensor 12 and the lens 21 complete active alignment. The system actively aligns and acquires the second position information of the first moving platform 30 in the thickness direction of the image sensor. The controller 40 is also used to determine dispensing height compensation information based on the first and second position information, and to control the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10 based on the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10 and the distance between the surface of the first image sensor 11 near the dispensing head 10 and the dispensing head 10 is within a preset allowable range. The controller 40 is also communicatively connected to the dispensing head 10 and is also used to control the dispensing head 10 to dispense adhesive onto the surface of the second image sensor 12 near the dispensing head 10 after the first moving platform 30 stops moving.

[0022] It should be noted that the first image sensor 11 in this embodiment of the invention can be a sample used for experiments before formal production to help determine parameters such as the adhesive coating height. During active alignment (AA), only the image sensor moves. Active alignment refers to the real-time reading of the image sensor's output image during the assembly of the lens 21 and the image sensor, providing closed-loop feedback. A six-axis precision displacement platform (the first moving platform 30 in this embodiment of the invention) dynamically fine-tunes the six degrees of freedom of the image sensor to automatically find the optimal imaging position for the entire image. After the image sensor and lens 21 complete active alignment, the distance between the surface of the image sensor near the dispensing head 10 and the lens 21 is almost the same, with only a fluctuation of a few tens of micrometers. The aforementioned first position information and second position information can be the height of the first moving platform 30. Figure 1 The vacuum suction chuck 22 is used to suction the lens 21 and ensure that the lens 21 is in a stable position.

[0023] After the controller 40 obtains the first position information of the first moving platform 30 in the thickness direction of the image sensor after the first image sensor 11 and lens 21 have completed active alignment, it can control the dispensing head 10 to dispense glue to the first image sensor 11 and record the position of the first moving platform 30 in the thickness direction of the image sensor at this time as the preset dispensing position. The preset dispensing position can be the first position corresponding to the first position information mentioned above, or it can be other positions.

[0024] It is understood that, in the case that the lenses 21 in the embodiments of the present invention are from the same batch, if the second image sensor 12 and the first image sensor 11 have the same thickness, the first position information and the second position information obtained by the controller 40 should be the same. If the second image sensor 12 and the first image sensor 11 have different thicknesses, the first position information and the second position information obtained by the controller 40 should be different. At this time, the thickness difference between the second image sensor 12 and the first image sensor 11 should be the difference between the second position information and the first position information (i.e., the above-mentioned glue dispensing height compensation information).

[0025] If the second position information is less than the first position information, it means that the thickness of the second image sensor 12 is greater than the thickness of the first image sensor 11. When dispensing glue to the second image sensor 12, the controller 40 should first control the first moving platform 30 to move along the thickness direction of the image sensor to the preset dispensing position, and then move the second image sensor 12 or the dispensing head 10 to increase the distance between the second image sensor 12 and the dispensing head 10. The increased distance should be the difference between the second position information and the first position information.

[0026] If the second position information is greater than the first position information, it means that the thickness of the second image sensor 12 is less than the thickness of the first image sensor 11. When dispensing glue to the second image sensor 12, the controller 40 should first control the first moving platform 30 to move along the thickness direction of the image sensor to the preset dispensing position, and then reduce the distance between the second image sensor 12 and the dispensing head 10 by moving the second image sensor 12 or the dispensing head 10. The reduced distance should be the difference between the second position information and the first position information.

[0027] In this embodiment of the invention, while controlling the dispensing head 10 to dispense adhesive, the controller 40 also controls the first moving platform 30 to move along a preset trajectory in the plane direction of the image sensor according to the preset shape so that the adhesive output by the dispensing head 10 can form a preset shape (e.g., a rectangular frame) on the surface of the image sensor (first image sensor 11, second image sensor 12). At this time, the first moving platform 30 will not move in the thickness direction of the image sensor.

[0028] This invention utilizes the characteristic that after the image sensor and lens 21 complete active alignment, the distance between the surface of the image sensor near the dispensing head 10 and the lens 21 is almost the same. First, it acquires the first position information of the first moving platform 30 in the thickness direction of the image sensor after the first image sensor 11 and lens 21 have completed active alignment, and uses this first position information as a reference. Then, after acquiring the second position information of the first moving platform 30 in the thickness direction of the image sensor after each of the second image sensors 12 and lens 21 has completed active alignment, it compares the second position information with the first position information to obtain dispensing height compensation information. It can be understood that this dispensing height compensation information is determined by the second image sensor... The inconsistency in thickness between the second image sensor 12 and the first image sensor 11 is caused by the dispensing height compensation information. Therefore, by first controlling the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10, the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10 is consistent with the distance between the surface of the first image sensor 11 near the dispensing head 10 and the dispensing head 10. Then, by controlling the dispensing device, the dispensing height of each second image sensor 12 can be consistent with the dispensing height of the first image sensor 11. This can overcome the influence of inconsistent image sensor thickness on the consistency of glue coating and improve the consistency of glue coating on different image sensors.

[0029] In one feasible implementation, the controller 40 in this embodiment of the invention is used to control the first moving platform 30 to move along the thickness direction of the image sensor according to the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10 and the distance between the surface of the first image sensor 11 near the dispensing head 10 and the dispensing head 10 is within a preset allowable range.

[0030] For example, when the dispensing head 10 is fixed, the second position information is less than the first position information, and the thickness of the second image sensor 12 is greater than the thickness of the first image sensor 11, if dispensing is required on the second image sensor 12, the controller 40 should first control the first moving platform 30 to move along the thickness direction of the image sensor to the preset dispensing position, and then control the second image sensor 12 to move along the direction away from the dispensing head 10 to the value corresponding to the above dispensing height compensation information.

[0031] When the dispensing head 10 is fixed, the second position information is greater than the first position information, and the thickness of the second image sensor 12 is less than the thickness of the first image sensor 11, if dispensing is required on the second image sensor 12, the controller 40 should first control the first moving platform 30 to move along the thickness direction of the image sensor to the preset dispensing position, and then control the second image sensor 12 to move along the direction closer to the dispensing head 10 to the value corresponding to the above dispensing height compensation information.

[0032] Figure 2 This is a schematic diagram of another dispensing device provided in an embodiment of the present invention, with reference to... Figure 2 In another feasible embodiment, the dispensing device in this invention further includes a second moving platform 50; the dispensing head 10 is fixed on the second moving platform 50; the controller 40 is also communicatively connected to the second moving platform 50 and is used to control the second moving platform 50 to move along the thickness direction of the image sensor according to the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10 and the distance between the surface of the first image sensor 11 near the dispensing head 10 and the dispensing head 10 is within a preset allowable range.

[0033] For example, when the second position information is less than the first position information and the thickness of the second image sensor 12 is greater than the thickness of the first image sensor 11, if it is necessary to apply adhesive to the second image sensor 12, the controller 40 should first control the first moving platform 30 to move along the thickness direction of the image sensor to the preset adhesive application position, and then control the second moving platform 50 to move along the direction away from the image sensor to the value corresponding to the above adhesive application height compensation information.

[0034] When the second position information is greater than the first position information and the thickness of the second image sensor 12 is less than the thickness of the first image sensor 11, if it is necessary to apply adhesive to the second image sensor 12, the controller 40 should first control the first moving platform 30 to move along the thickness direction of the image sensor to the preset adhesive application position, and then control the second moving platform 50 to move along the direction closer to the image sensor to the value corresponding to the above adhesive application height compensation information.

[0035] Optionally, after the first image sensor 11 and the lens 21 complete active alignment, the image output by the first image sensor 11 has a preset resolution; after the second image sensor 12 and the lens 21 complete active alignment, the image output by the second image sensor 12 has a preset resolution.

[0036] In this embodiment of the invention, the controller 40 can determine whether the first image sensor 11 and the lens 21 have completed active alignment based on whether the clarity of the image output by the first image sensor 11 reaches a preset clarity; and can determine whether the second image sensor 12 and the lens 21 have completed active alignment based on whether the clarity of the image output by the second image sensor 12 reaches a preset clarity.

[0037] Optionally, the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10 is the same as the distance between the surface of the first image sensor 11 near the dispensing head 10 and the dispensing head 10.

[0038] It is understandable that by controlling the difference between the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10 and the distance between the surface of the first image sensor 11 near the dispensing head 10 and the dispensing head 10 to be within a preset allowable range, the consistency of the adhesive applied to different image sensors can be improved. By setting the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10 to be the same as the distance between the surface of the first image sensor 11 near the dispensing head 10 and the dispensing head 10, the consistency of the adhesive applied to different image sensors can be further improved.

[0039] Figure 3 This is a schematic diagram of the structure of a first mobile platform provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of a platform structure provided in an embodiment of the present invention, with reference to... Figure 3 and Figure 4In this embodiment of the invention, the first mobile platform 30 includes a first driver, a second driver, a third driver, a first slide rail 301, a second slide rail 302, and a third slide rail 303; a controller 40 is communicatively connected to the first driver and is used to control the first driver to drive the stage 20 to move along a first direction on the first slide rail 301; the controller 40 is communicatively connected to the second driver and is used to control the second driver to drive the stage 20 to move along a second direction on the second slide rail 302; the controller 40 is communicatively connected to the third driver and is used to control the third driver to drive the stage 20 to move along a third direction on the third slide rail 303; the first direction, the second direction, and the third direction all intersect, and the third direction is the thickness direction of the image sensor.

[0040] It should be noted that the first, second, and third directions mentioned above can be perpendicular to each other. During active alignment between the image sensors (first image sensor 11, second image sensor 12) and the lens 21, the controller 40 can control the first, second, and third drivers to operate based on the real-time image output from the image sensors, adjusting the position of the image sensors until active alignment is completed, i.e., the clarity of the image output by the image sensors reaches a preset clarity (which can be the maximum clarity). The controller 40 can also control the third driver to operate when it is necessary to control the first moving platform 30 to move along the thickness direction of the image sensors.

[0041] Figure 5 This is a schematic diagram of the structure of a second mobile platform provided in an embodiment of the present invention, with reference to... Figure 5 The second moving platform 50 includes a fourth driver and a fourth slide rail 501; the controller 40 is communicatively connected to the fourth driver and is used to control the fourth driver to drive the dispensing head 10 to move along a third direction on the fourth slide rail 501, the third direction being the thickness direction of the image sensor.

[0042] The controller 40 can control the fourth driver to operate when it is necessary to control the second moving platform 50 to move along the thickness direction of the image sensor.

[0043] This invention also provides a dispensing method, which is applied to the dispensing apparatus provided in the above embodiments. Figure 6 A flowchart of a dispensing method provided in an embodiment of the present invention is shown below. Figure 6 The dispensing method in this embodiment of the invention includes: S110. After the first image sensor is placed on the first moving platform, control the first moving platform to move so that the first image sensor and the lens can be actively aligned, and obtain the first position information of the first moving platform in the thickness direction of the image sensor at this time.

[0044] For example, refer to Figure 1In this embodiment of the invention, the controller 40 is communicatively connected to the first mobile platform 30. After controlling the first mobile platform 30 to move so that the first image sensor 11 and the lens 21 complete active alignment, the controller 40 obtains the first position information of the first mobile platform 30 in the thickness direction of the image sensor. The first position information may be the height of the first mobile platform 30.

[0045] S120: After the second image sensor is placed on the first moving platform, control the first moving platform to move so that the second image sensor and the lens can be actively aligned, and obtain the second position information of the first moving platform in the thickness direction of the image sensor.

[0046] For example, refer to Figure 1 In this embodiment of the invention, after the controller 40 controls the first moving platform 30 to move so that the second image sensor 12 and the lens 21 can complete the active alignment, it can obtain the second position information of the first moving platform 30 in the thickness direction of the image sensor. The second position information may be another height of the first moving platform 30.

[0047] S130. Determine dispensing height compensation information based on the first position information and the second position information, and control the distance between the surface of the second image sensor near the dispensing head and the dispensing head based on the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

[0048] For example, refer to Figure 1 The controller 40 can use the difference between the first position information and the second position information as dispensing height compensation information. It will first control the first moving platform 30 to move to the preset dispensing position (the position of the first moving platform 30 in the thickness direction of the image sensor when the dispensing head 10 dispenses to the first image sensor 11), and then expand or shrink the distance between the dispensing head 10 and the second image sensor 12 according to the relationship between the first position information and the second position information. Specifically, if the second position information is less than the first position information, the controller 40 will, after controlling the first moving platform 30 to move along the thickness direction of the image sensor to the preset dispensing position, increase the distance between the second image sensor 12 and the dispensing head 10 by moving the second image sensor 12 or the dispensing head 10. The increased distance should be the difference between the second position information and the first position information. If the second position information is greater than the first position information, the controller 40 will, after controlling the first moving platform 30 to move along the thickness direction of the image sensor to the preset dispensing position, decrease the distance between the second image sensor 12 and the dispensing head 10 by moving the second image sensor 12 or the dispensing head 10. The decreased distance should be the difference between the second position information and the first position information.

[0049] S140, after the first moving platform stops moving, control the dispensing head to dispense adhesive onto the surface of the second image sensor near the dispensing head.

[0050] refer to Figure 1 It is understandable that while the controller 40 controls the dispensing head 10 to dispense glue, in order to make the glue output by the dispensing head 10 form a preset shape (such as a rectangular box) on the surface of the second image sensor 12, the controller 40 will also control the first moving platform 30 to move along a preset trajectory in the plane direction of the image sensor according to the preset shape. At this time, the first moving platform 30 will not move in the thickness direction of the image sensor.

[0051] This invention utilizes the characteristic that after the image sensor and lens 21 complete active alignment, the distance between the surface of the image sensor near the dispensing head 10 and the lens 21 is almost the same. First, it acquires the first position information of the first moving platform 30 in the thickness direction of the image sensor after the first image sensor 11 and lens 21 have completed active alignment, and uses this first position information as a reference. Then, after acquiring the second position information of the first moving platform 30 in the thickness direction of the image sensor after each of the second image sensors 12 and lens 21 has completed active alignment, it compares the second position information with the first position information to obtain dispensing height compensation information. It can be understood that this dispensing height compensation information is determined by the second image sensor... The inconsistency in thickness between the second image sensor 12 and the first image sensor 11 is caused by the dispensing height compensation information. Therefore, by first controlling the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10, the distance between the surface of the second image sensor 12 near the dispensing head 10 and the dispensing head 10 is consistent with the distance between the surface of the first image sensor 11 near the dispensing head 10 and the dispensing head 10. Then, by controlling the dispensing device, the dispensing height of each second image sensor 12 can be consistent with the dispensing height of the first image sensor 11. This can overcome the influence of inconsistent image sensor thickness on the consistency of glue coating and improve the consistency of glue coating on different image sensors.

[0052] Figure 7 A flowchart of another dispensing method provided in an embodiment of the present invention. Figure 7 The illustrated embodiment details how to control the distance between the surface of the second image sensor near the dispensing head and the dispensing head based on dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range. (Refer to...) Figure 7 The dispensing method in this embodiment of the invention includes: S210. After the first image sensor is placed on the first moving platform, control the first moving platform to move so that the first image sensor and the lens can be actively aligned, and obtain the first position information of the first moving platform in the thickness direction of the image sensor at this time.

[0053] S220: After the second image sensor is placed on the first moving platform, control the first moving platform to move so that the second image sensor and the lens can be actively aligned, and obtain the second position information of the first moving platform in the thickness direction of the image sensor at this time.

[0054] S230. Based on the dispensing height compensation information, control the first moving platform to move along the thickness direction of the image sensor, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

[0055] For example, refer to Figure 1 When the dispensing head 10 is fixed and the second position information is less than the first position information, if dispensing is required on the second image sensor 12, the controller 40 will first control the first moving platform 30 to move along the thickness direction of the image sensor to the preset dispensing position, and then control the second image sensor 12 to move along the direction away from the dispensing head 10 to the value corresponding to the above dispensing height compensation information.

[0056] When the second position information is greater than the first position information, if it is necessary to dispense glue to the second image sensor 12, the controller 40 will first control the first moving platform 30 to move along the thickness direction of the image sensor to the preset dispensing position, and then control the second image sensor 12 to move along the direction close to the dispensing head 10 to the value corresponding to the above dispensing height compensation information.

[0057] S240: After the first moving platform stops moving, control the dispensing head to dispense adhesive onto the surface of the second image sensor near the dispensing head.

[0058] Figure 8 This is a flowchart of another dispensing method provided in an embodiment of the present invention. Figure 8 The illustrated embodiment details how to control the distance between the surface of the second image sensor near the dispensing head and the dispensing head based on dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range. (Refer to...) Figure 8 The dispensing method in this embodiment of the invention includes: S310. After the first image sensor is placed on the first moving platform, control the first moving platform to move so that the first image sensor and the lens can be actively aligned, and obtain the first position information of the first moving platform in the thickness direction of the image sensor at this time.

[0059] S320: After the second image sensor is placed on the first moving platform, control the first moving platform to move so that the second image sensor and the lens can be actively aligned, and obtain the second position information of the first moving platform in the thickness direction of the image sensor at this time.

[0060] S330. Based on the dispensing height compensation information, control the second moving platform connected to the dispensing head to move along the thickness direction of the image sensor, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

[0061] For example, refer to Figure 2 When the second position information is less than the first position information, if it is necessary to apply adhesive to the second image sensor 12, the controller 40 can first control the first moving platform 30 to move along the thickness direction of the image sensor to the preset dispensing position, and then control the second moving platform 50 to move along the direction away from the image sensor to the value corresponding to the above dispensing height compensation information.

[0062] When the second position information is greater than the first position information, if it is necessary to apply adhesive to the second image sensor 12, the controller 40 can first control the first moving platform 30 to move along the thickness direction of the image sensor to the preset dispensing position, and then control the second moving platform 50 to move along the direction closer to the image sensor to the value corresponding to the above dispensing height compensation information.

[0063] S240: After the first moving platform stops moving, control the dispensing head to dispense adhesive onto the surface of the second image sensor near the dispensing head.

[0064] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A dispensing device, characterized in that, include: Dispensing head, stage, first moving platform, and controller; The platform is mounted on the first mobile platform and is used to support the first image sensor and a plurality of second image sensors. The controller is communicatively connected to the first mobile platform and is used to control the first mobile platform to move after the first image sensor is placed on the first mobile platform, so that the first image sensor and the lens can be actively aligned, and to obtain the first position information of the first mobile platform in the thickness direction of the image sensor at this time. The controller is also configured to control the first moving platform to move after the second image sensor is placed on the first moving platform, so that the second image sensor and the lens can be actively aligned, and to obtain the second position information of the first moving platform in the thickness direction of the image sensor at this time. The controller is further configured to determine dispensing height compensation information based on the first position information and the second position information, and control the distance between the surface of the second image sensor near the dispensing head and the dispensing head based on the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range. The controller is also communicatively connected to the dispensing head and is further configured to control the dispensing head to dispense adhesive onto the surface of the second image sensor near the dispensing head after the first moving platform stops moving.

2. The dispensing device according to claim 1, characterized in that, The controller is configured to control the first moving platform to move along the thickness direction of the image sensor according to the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

3. The dispensing device according to claim 1, characterized in that, It also includes a second mobile platform; the dispensing head is fixed on the second mobile platform; The controller is also communicatively connected to the second mobile platform and is used to control the second mobile platform to move along the thickness direction of the image sensor according to the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

4. The dispensing device according to claim 1, characterized in that, After the first image sensor and the lens complete active alignment, the image output by the first image sensor has a preset resolution. After the second image sensor and the lens are actively aligned, the image output by the second image sensor has the desired sharpness.

5. The dispensing apparatus according to any one of claims 1 to 3, characterized in that, The distance between the surface of the second image sensor near the dispensing head and the dispensing head is the same as the distance between the surface of the first image sensor near the dispensing head and the dispensing head.

6. The dispensing device according to claim 1, characterized in that, The first mobile platform includes a first driver, a second driver, a third driver, a first slide rail, a second slide rail, and a third slide rail; The controller is communicatively connected to the first driver and is used to control the first driver to drive the stage to move along the first direction on the first slide rail. The controller is communicatively connected to the second driver and is used to control the second driver to drive the stage to move along the second direction on the second slide rail; The controller is communicatively connected to the third driver and is used to control the third driver to drive the stage to move along a third direction on the third slide rail; The first direction, the second direction, and the third direction all intersect, and the third direction is the thickness direction of the image sensor.

7. The dispensing device according to claim 3, characterized in that, The second mobile platform includes a fourth drive and a fourth slide rail; The controller is communicatively connected to the fourth driver and is used to control the fourth driver to drive the dispensing head to move along a third direction on the fourth slide rail, the third direction being the thickness direction of the image sensor.

8. A dispensing method, characterized in that, The dispensing apparatus according to any one of claims 1-7, wherein the dispensing method comprises: After the first image sensor is placed on the first moving platform, the first moving platform is controlled to move so that the first image sensor and the lens are actively aligned, and the first position information of the first moving platform in the thickness direction of the image sensor is obtained at this time. After the second image sensor is placed on the first moving platform, the first moving platform is controlled to move so that the second image sensor and the lens are actively aligned, and the second position information of the first moving platform in the thickness direction of the image sensor is obtained at this time. Based on the first position information and the second position information, dispensing height compensation information is determined, and based on the dispensing height compensation information, the distance between the surface of the second image sensor near the dispensing head and the dispensing head is controlled, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range. After the first mobile platform stops moving, the dispensing head is controlled to dispense adhesive onto the surface of the second image sensor near the dispensing head.

9. The dispensing method according to claim 8, characterized in that, The distance between the surface of the second image sensor near the dispensing head and the dispensing head is controlled according to the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range, including: Based on the dispensing height compensation information, the first moving platform is controlled to move along the thickness direction of the image sensor, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

10. The dispensing method according to claim 8, characterized in that, The distance between the surface of the second image sensor near the dispensing head and the dispensing head is controlled according to the dispensing height compensation information, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range, including: According to the dispensing height compensation information, the second moving platform connected to the dispensing head is controlled to move along the thickness direction of the image sensor, so that the difference between the distance between the surface of the second image sensor near the dispensing head and the dispensing head and the distance between the surface of the first image sensor near the dispensing head and the dispensing head is within a preset allowable range.

Images