Lens module and imaging device

Abstract

The utility model relates to a lens module and an imaging device, the lens module comprises a support, a lens assembly and an adjusting assembly, and the lens assembly is telescopically arranged on the support and is used for collecting a light source emitted by a to-be-detected product; the adjusting assembly is arranged on the support and used for adjusting the expansion and contraction amount of the lens assembly, the adjusting assembly comprises a driving source, a first gear and a second gear, the first gear is arranged on the lens assembly, the driving source is movably arranged on the support, and the second gear is arranged at the output end of the driving source and meshed with the first gear. According to the lens module provided by the invention, the second gear is engaged with the first gear and drives the first gear to rotate, so that the expansion amount of the lens assembly is adjusted, the distance from the center of the lens assembly to the imaging plane of the product to be detected is changed, and different imaging effects are realized; the meshing clearance between the first gear and the second gear can be adjusted through movement of the driving source, the focusing precision of the lens is improved, and then the performance of a to-be-detected product and the defect detection reliability are improved.

Description

Technical Field

[0001] This application relates to the field of optical inspection technology, and in particular to a lens module and imaging device. Background Technology

[0002] With the rapid development of optical technology, the technology and product application scale of display devices have grown rapidly. Display technology has been continuously iterating and developing from LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), Mini LED (Mini Light-Emitting Diode), and Micro LED (Micro Light-Emitting Diode Display), which has put forward higher requirements for the performance and defect detection of display panels.

[0003] Currently, in the process of performance and defect testing of display panels, lens modules are typically used to collect the light emitted by the display panel in order to detect issues such as color deviation and brightness unevenness (Mura defects). However, because the focal length of the lens module is not adjustable or has poor adjustability, the reliability of display panel performance and defect testing is low. Utility Model Content

[0004] Therefore, it is necessary to provide a lens module and imaging device to address the problem of low reliability in performance and defect detection of existing display panels.

[0005] A lens module, the lens module comprising:

[0006] support;

[0007] A lens assembly, retractably mounted on the bracket, for capturing the light emitted by the product under inspection; and

[0008] An adjustment component is disposed on the bracket and is used to adjust the extension and retraction of the lens assembly. The adjustment component includes a drive source, a first gear, and a second gear. The first gear is disposed on the lens assembly, the drive source is movably disposed on the bracket, and the second gear is disposed at the output end of the drive source and meshes with the first gear.

[0009] In one embodiment, the adjustment assembly further includes a rotating plate hinged to the bracket, and the drive source is disposed on the rotating plate.

[0010] In one embodiment, the adjustment assembly further includes a rotating shaft and an elastic element. One end of the rotating plate is rotatably connected to the bracket via the rotating shaft, and the elastic element is disposed on the rotating plate for pressing the rotating plate against the bracket.

[0011] In one embodiment, the adjustment assembly further includes a set screw disposed between the rotating plate and the bracket, and located at the end of the rotating plate away from the rotating shaft. The set screw is used to adjust the amount of rotation of the rotating plate relative to the bracket.

[0012] In one embodiment, the lens module further includes a control module, which is used for communication between the lens assembly and the external terminal when the lens assembly is connected to an external terminal.

[0013] In one embodiment, the external terminal has a first signal unit, and the lens assembly has a second signal unit;

[0014] The first signal unit or the second signal unit is communicatively connected to the control module, and when the lens assembly is connected to the external terminal, the first signal unit and the second signal unit are electrically connected.

[0015] In one embodiment, the control module is a programmable logic controller or a microcontroller.

[0016] In one embodiment, the lens module further includes a housing, in which both the lens assembly and the control module are housed.

[0017] An imaging device, the imaging device comprising:

[0018] Imaging module; and

[0019] The lens module as described in any of the above technical solutions is detachably connected to the imaging module.

[0020] In one embodiment, the imaging module has at least one foolproof notch, and the lens module has a foolproof protrusion that mates with the foolproof notch.

[0021] The aforementioned lens module and imaging device allow the lens assembly to collect the light emitted by the product under inspection for optical inspection. The drive source outputs power to the second gear, which meshes with the first gear and drives the first gear to rotate, thereby adjusting the extension and retraction of the lens assembly and changing the distance from the center of the lens assembly to the imaging plane of the product under inspection, thus achieving different imaging effects. Furthermore, since the drive source is movably mounted on the bracket, the meshing gap between the first and second gears can be adjusted by the movement of the drive source, improving the focusing accuracy of the lens and thus improving the performance of the product under inspection and the reliability of defect detection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the lens module provided in some embodiments.

[0023] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle.

[0024] Figure 3 This is a schematic diagram of the structure of the lens assembly and control module provided in some embodiments.

[0025] Figure 4 This is an exploded view of the lens assembly and external terminal module provided in some embodiments.

[0026] Figure 5 This is an exploded view of the imaging device provided in some embodiments.

[0027] Figure 6 This is a schematic diagram of the imaging module provided in some embodiments.

[0028] Figure label:

[0029] 100. Lens module;

[0030] 110. Bracket; 120. Lens assembly; 121. Lens; 122. Lens barrel; 123. Second signal unit; 124. Foolproof protrusion; 130. Adjustment assembly; 131. Drive source; 132. First gear; 133. Second gear; 134. Rotating plate; 135. Rotating shaft; 136. Elastic element; 137. Set screw; 140. Control module; 150. External terminal; 151. First signal unit; 160. Housing;

[0031] 200. Imaging device;

[0032] 210. Imaging module; 211. Foolproof notch. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] The technical solutions provided by the embodiments of this application are described below with reference to the accompanying drawings.

[0040] See Figures 1-3 As shown, this application provides a lens module 100, which includes a bracket 110, a lens assembly 120, and an adjustment assembly 130. The lens module 100 is used to collect the light emitted by the product under inspection. In this embodiment, the product under inspection is a display module. Of course, in other feasible embodiments, the product under inspection can also be a semiconductor chip, a wearable watch, etc. This application does not limit the specific component type of the product under inspection.

[0041] Lens assembly 120 is retractably mounted on bracket 110 and is used to collect the light source emitted by the product under inspection. Exemplarily, lens module 100 includes lens 121 and lens barrel 122. Lens 121 is retractably mounted on lens barrel 122 and is used to collect the light source emitted by the product under inspection. Lens barrel 122 covers the outside of lens 121 to protect it.

[0042] An adjustment component 130 is disposed on the bracket 110 and is used to adjust the extension / retraction of the lens assembly 120. Thus, by adjusting the extension / retraction of the lens assembly 120 using the adjustment component 130, the focal length of the lens assembly 120 is adjusted, changing the distance from the center of the lens assembly 120 to the imaging plane of the product under inspection, thereby achieving different imaging effects and meeting various inspection requirements of the product. For example, if the adjustment component 130 adjusts the focal length of the lens assembly 120 to a shorter value, the field of view of the lens assembly 120 is wider, allowing for a wider imaging scene; conversely, if the adjustment component 130 adjusts the focal length of the lens assembly 120 to a longer value, it can focus on distant subjects.

[0043] Specifically, the adjustment assembly 130 includes a drive source 131, a first gear 132, and a second gear 133. The first gear 132 is disposed on the lens assembly 120, such as being sleeved on the outside of the lens assembly 120. The drive source 131 is movably disposed on the bracket 110, and the second gear 133 is disposed at the output end of the drive source 131, and the second gear 133 meshes with the first gear 132. Thus, when the drive source 131 outputs power to the second gear 133, since the second gear 133 meshes with the first gear 132, the second gear 133 drives the first gear 132 to rotate, thereby adjusting the extension and retraction of the lens assembly 120. Furthermore, since the drive source 131 is movably disposed on the bracket 110, by adjusting the drive source 131, the meshing gap between the first gear 132 and the second gear 133 can be adjusted, thereby improving the focusing accuracy of the lens assembly 120. In this embodiment, the drive source 131 is a drive motor, and the drive motor has an output shaft. The second gear 133 is disposed on the output shaft of the drive motor by means of sleeve, screw connection, etc. Of course, in other feasible embodiments, the drive source 131 can also be a drive cylinder, drive pump, or other drive components. This application does not limit the specific component type of the drive source 131.

[0044] The aforementioned lens module 100 and lens assembly 120 collect the light emitted by the product under inspection for optical inspection. The drive source 131 outputs power to the second gear 133, which meshes with the first gear 132 and drives the first gear 132 to rotate, thereby adjusting the extension and retraction of the lens assembly 120 and changing the distance from the center of the lens assembly 120 to the imaging plane of the product under inspection, thus achieving different imaging effects. Furthermore, since the drive source 131 is movably mounted on the bracket 110, the meshing gap between the first gear 132 and the second gear 133 can be adjusted by the movement of the drive source 131, thereby improving the focusing accuracy of the lens assembly 120 and thus improving the performance and defect detection reliability of the product under inspection.

[0045] In one embodiment, see Figure 1 and Figure 2As shown, the adjustment assembly 130 also includes a rotating plate 134. The rotating plate 134 is hinged to the bracket 110, and the drive source 131 is disposed on the rotating plate 134. Thus, by rotating the rotating plate 134 relative to the bracket 110, the rotation amount of the rotating plate 134 is adjusted. Since the drive source 131 is disposed on the rotating plate 134, the drive source 131 rotates and drives the second gear 133 to move towards or away from the first gear 132. For example, when the drive source 131 rotates and drives the second gear 133 to move towards the first gear 132, the meshing clearance between the first gear 132 and the second gear 133 can be reduced; conversely, when the drive source 131 rotates and drives the second gear 133 to move away from the first gear 132, the meshing clearance between the first gear 132 and the second gear 133 can be increased. In this way, the focusing accuracy of the lens assembly 120 can be improved by adjusting the meshing clearance between the first gear 132 and the second gear 133.

[0046] Specifically, see Figure 1 and Figure 2 As shown, the adjustment assembly 130 also includes a rotating shaft 135 and an elastic element 136. One end of the rotating plate 134 is rotatably connected to the bracket 110 via the rotating shaft 135. That is, one end of the rotating plate 134 is connected to the rotating shaft 135 and is the rotating end, while the other end of the rotating plate 134 is the free end. The rotating plate 134 can rotate relative to the bracket 110 around the rotating shaft 135 to drive the drive source 131 to rotate, adjust the meshing clearance between the first gear 132 and the second gear 133, and improve the focusing accuracy of the lens assembly 120. The elastic element 136 is disposed on the rotating plate 134. The elastic element 136 is used to press the rotating plate 134 against the bracket 110 to ensure that the first gear 132 is always engaged with the second gear 133, thereby improving the transmission reliability between the first gear 132 and the second gear 133. Preferably, the elastic element 136 is disposed at the end of the rotating plate 134 away from the rotating shaft 135. Since the end of the rotating plate 134 away from the rotating shaft 135 is a free end, the elastic element 136 can make the free end of the rotating plate 134 press well against the bracket 110, so as to ensure that the first gear 132 is always engaged with the second gear 133, and avoid the inability to perform focusing operation on the lens assembly 120 due to the excessive meshing gap between the second gear 133 and the first gear 132.

[0047] In this embodiment, the elastic element 136 is a spring. Through the elastic deformation of the elastic element 136, the rotating plate 134 can always be pressed against the bracket 110 during rotation. Of course, in other feasible embodiments, the elastic element 136 can also be an elastic sheet, an elastic column, an elastic pin, or other elastic elements. This application does not limit the specific type of elastic element 136.

[0048] Furthermore, see Figure 1 and Figure 2As shown, the adjustment assembly 130 also includes a set screw 137. The set screw 137 is disposed between the rotating plate 134 and the bracket 110, and is located at the end of the rotating plate 134 away from the rotating shaft 135. The set screw 137 is used to adjust the amount of rotation of the rotating plate 134 relative to the bracket 110. When the set screw 137 is screwed onto the rotating plate 134, one end of the set screw 137 abuts against the bracket 110, and the other end protrudes to the outside of the rotating plate 134, facilitating the operator to perform the screwing operation. Thus, the operator can adjust the length of the set screw 137 extending beyond the rotating plate 134 by screwing the set screw 137, changing the gap between the rotating plate 134 and the bracket 110, thereby adjusting the amount of rotation of the rotating plate 134, driving the drive source 131 to rotate, adjusting the meshing clearance between the first gear 132 and the second gear 133, and improving the focusing accuracy of the lens assembly 120.

[0049] In one embodiment, see Figures 1-4 As shown, the lens module 100 also includes a control module 140. When the lens assembly 120 is connected to the external terminal 150, the control module 140 is used for communication between the lens assembly 120 and the external terminal 150. Thus, the control module 140 enables communication between the lens assembly 120 and the external terminal 150, establishing a communication relationship between them, allowing the external terminal 150 to cooperate with the lens assembly 120 to complete various testing requirements.

[0050] Specifically, see Figures 1-4 As shown, the external terminal 150 has a first signal unit 151, and the lens module 100 has a second signal unit 123. Either the first signal unit 151 or the second signal unit 123 is communicatively connected to the control module 140, such as via Bluetooth, Wi-Fi, or other means. When the control module 140 is located on the external terminal 150, the first signal unit 151 is communicatively connected to the control module 140. When the control module 140 is located on the lens module 100, such as at its outer edge, the second signal unit 123 is communicatively connected to the control module 140. This direct communication between the first signal unit 151 or the second signal unit 123 and the control module 140 shortens the communication distance and improves the communication sensitivity between the lens assembly 120 and the external terminal 150.

[0051] The control module 140 is either a programmable logic controller (PLC) or a microcontroller unit (MCU). Of course, in other feasible embodiments, the control module 140 can also be an embedded processor or other control element. This application does not limit the specific element type of the control module 140.

[0052] In the aforementioned testing mechanism, when the lens module 100 is connected to the external terminal 150, the first signal unit 151 and the second signal unit 123 are electrically connected. If the first signal unit 151 and the second signal unit 123 can be probe modules, when the first signal unit 151 and the second signal unit 123 are in contact, the first signal unit 151 and the second signal unit 123 are electrically connected to achieve communication connection between the external terminal 150 and the lens module 100.

[0053] In one embodiment, see Figures 1-4 As shown, the lens module 100 also includes a housing 160. Both the lens assembly 120 and the control module 140 are housed in the housing 160. The housing 160 can protect the lens assembly 120 and the control module 140 and ensure the operational stability of the lens assembly 120.

[0054] Additionally, see Figure 1 , Figure 2 and Figure 5 As shown, this application also provides an imaging device 200, which includes an imaging module 210 and a lens module 100 as described above. The lens module 100 is detachably connected to the imaging module 210, for example, by means of screwing, snap-fitting, or other methods. Thus, different specifications of lens modules 100 can be connected to the imaging module 210 to expand the application scenarios of the imaging device 200 and meet various testing requirements of the product to be inspected. For example, connecting a fixed-focus lens module 100 to the imaging module 210 can improve image quality and reduce the overall size of the imaging device 200; or connecting a zoom lens module 100 to the imaging module 210 can adapt to rapidly changing imaging scenarios.

[0055] In this embodiment, the imaging module 210 is a colorimeter, and the lens module 100 collects the light emitted by the product under inspection for surface defect detection. The imaging module 210 also receives the light source collected by the lens module 100 and quantifies its color for color deviation detection. Thus, the imaging module 210 and lens module 100 can simultaneously detect color deviation and surface defects of the product under inspection, improving inspection efficiency and reducing inspection costs. Of course, in other feasible embodiments, the imaging module 210 can also be a filter module or other components requiring optical inspection. This application does not limit the specific component type of the imaging module 210.

[0056] In one embodiment, see further. Figure 6 As shown, the imaging module 210 has at least one foolproof notch 211, and the lens module 100 has a foolproof protrusion 124 that mates with the foolproof notch 211. Thus, during the assembly of the imaging module 210 and the lens module 100, the foolproof protrusion 124 can mate with the foolproof notch 211, improving the ease and speed of assembly of the imaging device 200, and preventing functional defects in the imaging device 200 due to assembly deviations between the imaging module 210 and the lens module 100.

[0057] Preferably, there are multiple anti-mistake notches 211, and multiple anti-mistake protrusions 124 are spaced apart along the circumferential direction of the imaging module 210. There are also multiple anti-mistake protrusions 124, and the multiple anti-mistake protrusions 124 are adapted to the multiple anti-mistake notches 211. For example, the number and position of the anti-mistake protrusions 124 and the anti-mistake notches 211 are adapted to ensure the accuracy of the assembly position of the imaging module 210 and the lens module 100.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A lens module, characterized in that, The lens module includes: support; A lens assembly, retractably mounted on the bracket, for capturing the light emitted by the product under inspection; and An adjustment component is disposed on the bracket and is used to adjust the extension and retraction of the lens assembly. The adjustment component includes a drive source, a first gear, and a second gear. The first gear is disposed on the lens assembly, the drive source is movably disposed on the bracket, and the second gear is disposed at the output end of the drive source and meshes with the first gear.

2. The lens module according to claim 1, characterized in that, The adjustment assembly also includes a rotating plate hinged to the bracket, and the drive source is disposed on the rotating plate.

3. The lens module according to claim 2, characterized in that, The adjustment assembly further includes a rotating shaft and an elastic element. One end of the rotating plate is rotatably connected to the bracket via the rotating shaft. The elastic element is disposed on the rotating plate and is used to press the rotating plate against the bracket.

4. The lens module according to claim 3, characterized in that, The adjustment assembly further includes a set screw, which is disposed between the rotating plate and the bracket and located at the end of the rotating plate away from the rotating shaft. The set screw is used to adjust the amount of rotation of the rotating plate relative to the bracket.

5. The lens module according to claim 1, characterized in that, The lens module also includes a control module, which is used for communication between the lens assembly and the external terminal when the lens assembly is connected to an external terminal.

6. The lens module according to claim 5, characterized in that, The external terminal has a first signal unit, and the lens assembly has a second signal unit; The first signal unit or the second signal unit is communicatively connected to the control module, and when the lens assembly is connected to the external terminal, the first signal unit and the second signal unit are electrically connected.

7. The lens module according to any one of claims 5 or 6, characterized in that, The control module is either a programmable logic controller or a microcontroller.

8. The lens module according to any one of claims 5 or 6, characterized in that, The lens module also includes a housing, in which both the lens assembly and the control module are housed.

9. An imaging device, characterized in that, The imaging device includes: Imaging module; The lens module as described in any one of claims 1-8, wherein the lens module is detachably connected to the imaging module.

10. The imaging apparatus according to claim 9, characterized in that, The imaging module has at least one foolproof notch, and the lens module has a foolproof protrusion that cooperates with the foolproof notch.

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