A probe card precise positioning device for display panel detection

Abstract

The application discloses a kind of probe card accurate positioning device for display panel detection, including base, gantry, probe card positioning component is set below gantry, including upper jig, lower jig, positioning through device and positioning clamping device, realize the accurate positioning and clamping of probe card, detection probe is connected with probe card main body by adjusting component, adjusting component includes first mounting seat, connecting seat, second mounting seat and Z axis, X axis, Y axis three-way adjusting mechanism, the accurate position adjustment of detection probe can be realized, positioning mechanism is used to shoot the alignment condition of detection probe and display panel contact center, alignment component is set at the both ends of probe card main body, convenient for installation debugging.The present application can realize the accurate positioning and quick replacement of probe card, improve the precision and efficiency of display panel detection, with accurate positioning, convenient adjustment, wide application range and other advantages.

Description

Technical Field

[0001] This invention relates to the field of display panel testing technology, specifically to a probe card precise positioning device for display panel testing. Background Technology

[0002] Display panels are widely used display components in electronic products such as televisions, computer monitors, mobile phones, and tablets. Their quality directly affects the display effect and lifespan of these products. During the production process, electrical performance testing is required to eliminate defective products and ensure the quality of finished goods. Display panel testing is a crucial step in the production process and is of great significance in guaranteeing the quality of display panel products.

[0003] The probe card is a core component of display panel testing equipment. It is used to establish an electrical connection with the test contacts on the display panel, transmit the test signal to the testing equipment, and perform tests on the electrical performance of the display panel. The positioning accuracy of the probe card directly affects the accuracy of the test results. If the probe card is not accurately aligned with the display panel contacts, the test signal may not be transmitted correctly, affecting testing efficiency and accuracy, and may even damage the display panel.

[0004] The existing probe card positioning device has the following shortcomings: First, the installation and replacement of probe cards are complex operations that require precise manual alignment, which is time-consuming and affects detection efficiency. Secondly, the positioning accuracy of the probe card is limited, making it difficult to meet the requirements of high-precision display panel detection; Third, the position adjustment of the detection probe is inconvenient and cannot quickly adapt to the detection requirements of display panels of different specifications; Fourth, the reliability of the circuit connection between the probe card and the testing equipment is not high, and poor contact is prone to occur. Summary of the Invention

[0005] The purpose of this invention is to provide a probe card precise positioning device for display panel testing, so as to solve the technical problems of low positioning accuracy, inconvenient replacement, and low testing efficiency of probe cards in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a probe card precise positioning device for display panel testing, comprising a base, a gantry, a display panel conveying device, a probe card conveying device, a probe card positioning component, a detection probe adjustment component, a positioning mechanism, and an alignment component.

[0007] Furthermore, a display panel conveying device is installed at one end of the base for positioning, lifting, and conveying the display panel. A probe conveying device is installed at the other end of the base for picking up and conveying probe cards, and can achieve automated loading and unloading of probe cards using a multi-stage telescopic method. A gantry frame is also installed on the base to support the probe card positioning components and positioning mechanism.

[0008] Furthermore, a probe card positioning assembly is installed below the gantry, including an upper fixture positioned below the gantry. The upper fixture, via a UVW leveling device, houses the lower fixture, enabling position adjustment and angle correction of the probe card in the horizontal plane. A positioning and conduction device is located below the lower fixture to establish electrical connection between the probe card and the testing equipment. Positioning and clamping devices are also equidistantly arranged on the lower fixture for precise positioning and clamping of the probe card.

[0009] Furthermore, the lower fixture is equipped with a probe card body via a positioning and clamping device. The probe card body has a conductive socket electrically connected to the positioning and conduction device, enabling the probe card to be guided, positioned, and connected via circuitry. Multiple sets of detection probes are equidistantly arranged at the front end of the probe card body for contacting the test contacts on the display panel.

[0010] Furthermore, the detection probe is connected to the probe card body via an adjustment assembly. The adjustment assembly includes a first mounting base equidistantly positioned at the front end of the probe card body. The first mounting base is connected to a connecting base via a Z-axis adjustment mechanism. The connecting base is fitted with a second mounting base via X and Y-axis adjustment mechanisms. The detection probe is mounted on the front sidewall of the second mounting base. Through the coordination of the Z-axis, X-axis, and Y-axis three-way adjustment mechanisms, precise position adjustment of the detection probe in three-dimensional space is achieved.

[0011] Furthermore, the Z-axis adjustment mechanism includes a threaded hole on the connecting seat. An adjusting screw is threaded onto the first mounting seat. The adjusting screw engages with the threaded hole. Rotating the adjusting screw drives the first mounting seat to move up and down along the Z-axis, adjusting the distance between the detection probe and the display panel.

[0012] Furthermore, the connector has symmetrical through holes at both ends of the threaded hole. A spring is installed inside each through hole. The top of the spring abuts against the bottom of the first mounting base. The spring acts as a buffer and reset mechanism, ensuring uniform pressure when the detection probe contacts the display panel.

[0013] Furthermore, the X and Y axis adjustment mechanism includes a second mounting hole on the second mounting base. A first mounting hole matching the second mounting hole is provided on the connecting base. The diameter of the second mounting hole is larger than that of the first mounting hole, facilitating the alignment and adjustment of the detection probe with the contact center using a positioning camera.

[0014] Furthermore, an adjusting bolt is provided between the first mounting hole and the second mounting hole. A shim is provided on the adjusting bolt. Adjusting the position of the adjusting bolt can move the second mounting base within the second mounting hole along the X and Y axes, thereby achieving fine adjustment of the planar position of the detection probe.

[0015] Furthermore, a positioning mechanism is also provided on the gantry. The positioning mechanism includes a mounting bracket mounted on the gantry. The mounting bracket has symmetrically arranged moving plates via a drive device. A positioning camera is installed on the side wall of the moving plate. The positioning camera can capture images of the alignment between the detection probe and the center of the contact point on the display panel.

[0016] Furthermore, a cover plate is provided on the outside of the mounting bracket. The cover plate covers the moving plate, shielding and protecting the drive unit, while not affecting the reciprocating movement of the drive unit with the moving plate.

[0017] Furthermore, alignment components are symmetrically arranged at both ends of the probe card body. Each alignment component includes a fixing plate symmetrically arranged at both ends of the probe card body. An alignment camera is located at the end of each fixing plate. The alignment camera is used to assist in the precise alignment of the probe with the display panel contacts.

[0018] Compared with the prior art, the beneficial effects of the present invention are: (1) By setting up a probe card positioning component, including an upper fixture, a lower fixture, a positioning and guiding device and a positioning and clamping device, the probe card can be accurately positioned and firmly clamped, ensuring the positional stability of the probe card during the detection process and improving the detection accuracy.

[0019] (2) By setting up a detection probe adjustment component, including a Z-axis adjustment mechanism, an X-axis adjustment mechanism and a Y-axis adjustment mechanism, the detection probe can be precisely adjusted in three-dimensional space, which facilitates the quick alignment of the detection probe with the display panel contact point and improves detection efficiency.

[0020] (3) By setting a spring in the Z-axis adjustment mechanism, the detection probe is buffered when it contacts the display panel, ensuring uniform contact pressure and avoiding damage to the display panel.

[0021] (4) By setting up a positioning mechanism, including a positioning camera, the alignment of the detection probe and the display panel contact can be monitored in real time, so as to realize automated alignment and improve alignment accuracy and efficiency.

[0022] (5) By setting up alignment components, including a fixing plate and an alignment camera, the installation and debugging of probe cards are facilitated, the replacement time is shortened, and the production efficiency is improved.

[0023] (6) By setting the electrical connection between the conductive socket and the positioning conductive device, the reliability of the circuit conduction between the probe card and the detection equipment is ensured, and the problem of poor contact is avoided.

[0024] (7) By setting a cover plate on the outside of the mounting frame, the drive device is shielded and protected to prevent dust and debris from entering, while not affecting the drive device to drive the moving plate to move back and forth, thus ensuring the smoothness of the positioning mechanism's movement and its service life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a probe card precise positioning device for display panel detection proposed in this invention; Figure 2 This is a schematic diagram of the probe card positioning component in a probe card precise positioning device for display panel testing proposed in this invention. Figure 3 This is a schematic diagram of the positioning mechanism in a probe card precision positioning device for display panel testing proposed in this invention. Figure 4 This is a partial structural diagram of the positioning mechanism in a probe card precision positioning device for display panel testing proposed in this invention. Figure 5 This is a schematic diagram of the probe card body in a probe card precision positioning device for display panel detection proposed in this invention; Figure 6 This is a schematic diagram of the mounting base and connection structure in a probe card precision positioning device for display panel testing proposed in this invention.

[0026] In the diagram: 11. Base; 12. Gantry; 13. Display panel conveying device; 14. Probe conveying device; 21. Upper fixture; 22. Lower fixture; 23. Positioning and guiding device; 24. Positioning and clamping device; 31. Mounting frame; 32. Drive device; 33. Moving plate; 34. Positioning camera; 35. Cover plate; 41. Probe card body; 42. Conducting socket; 43. Fixing plate; 44. Alignment camera; 51. First mounting seat; 52. Detection probe; 53. Connecting seat; 54. Second mounting seat; 61. First mounting hole; 62. Second mounting hole; 63. Adjusting bolt; 71. Adjusting screw; 72. Threaded hole; 73. Spring. Detailed Implementation

[0027] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0028] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0030] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, 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. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0031] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0032] Furthermore, to provide the public with a better understanding of the present invention, certain specific details are described in detail in the following description of the invention. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0033] Please see Figures 1-6 This invention provides an embodiment of a probe card precise positioning device for display panel testing, comprising a base 11, a gantry frame 12, a display panel conveying device 13, a probe card conveying device 14, a probe card positioning assembly, a detection probe adjustment assembly, a positioning mechanism, and an alignment assembly. The base 11 is the fundamental support component of the entire device and is typically made of high-strength metal materials, such as aluminum alloy or stainless steel, to ensure the structural strength and stability of the device. The base 11 has mounting surfaces for installing and fixing the various functional components.

[0034] In the specific implementation process, a display panel conveying device 13 is provided at one end of the base 11. The display panel conveying device 13 is used to transport the display panel to be tested to the testing station and to perform precise positioning and lifting operations on the display panel. The display panel conveying device 13 can be in the form of a roller conveyor, belt conveyor or pneumatic conveying device to achieve stable transport of the display panel. The positioning mechanism can be a photoelectric sensor, limit switch or vision recognition system to achieve precise detection and positioning of the display panel position. The lifting mechanism can be a cylinder or electric push rod to push the display panel up to the position where it contacts the testing probe 52.

[0035] By adopting the above technical solution, the display panel conveying device 13 is set up to realize the automated conveying and precise positioning of the display panel, reduce manual operation, and improve detection efficiency.

[0036] In the specific implementation process, a probe delivery device 14 is provided at the other end of the base 11. The probe delivery device 14 is used to transport the probe card from the storage position to the installation position, or to transport the used probe card from the installation position to the storage position or the replacement position. The probe delivery device 14 can adopt a multi-stage telescopic method, including a telescopic arm, a robotic arm or a track delivery system. The multi-stage telescopic method can realize the large-scale and rapid transportation of the probe card, shortening the replacement time. The probe delivery device 14 is also equipped with a vacuum suction cup or a special clamp for gripping and releasing the probe card to ensure safety during the transportation process.

[0037] By adopting the above technical solution and setting up the probe feeding device 14, the automatic loading and unloading of probe cards can be realized, the probe card replacement time can be shortened, and the detection efficiency can be improved.

[0038] In the specific implementation process, a gantry frame 12 is also provided on the base 11. The gantry frame 12 is located above the base 11 and has a gate-shaped structure. It provides installation support for the probe card positioning assembly and positioning mechanism. The gantry frame 12 is usually made of high-strength steel and has sufficient rigidity and stability to ensure that no deformation or vibration occurs during the detection process. The gantry frame 12 is also provided with guide rails and slider mechanisms for installing and guiding the moving parts of the probe card positioning assembly and positioning mechanism.

[0039] By adopting the above technical solution, a gantry frame 12 is set up to provide a stable installation platform for the probe card positioning component and the positioning mechanism, ensuring positioning accuracy and the smoothness of mechanism movement.

[0040] In some embodiments of this application, reference is made to Figure 1 and Figure 2 A probe card positioning assembly is provided below the gantry frame 12. The probe card positioning assembly includes an upper fixture 21, a lower fixture 22, a positioning and guiding device 23, and a positioning and clamping device 24. The probe card positioning assembly is used to receive the probe card conveyed by the probe card conveying device 14 and to accurately position the probe card at the detection station.

[0041] In the specific implementation process, the upper fixture 21 is set below the gantry frame 12 and is fixedly connected to the gantry frame 12 through connectors. The upper fixture 21 is usually a rectangular plate structure with positioning grooves and mounting holes on the upper surface for positioning and fixing the lower fixture 22. The upper fixture 21 is usually made of high-strength aluminum alloy or steel, and the surface is hardened to have good wear resistance and stability.

[0042] By adopting the above technical solution, the upper fixture 21 is set as the basic component of the probe card positioning assembly, providing stable installation support.

[0043] In the specific implementation process, the upper fixture 21 is equipped with a lower fixture 22 via a UVW leveling device. The UVW leveling device is a three-axis fine-tuning mechanism, including adjustment mechanisms in the U, V, and W axes. The U-axis adjustment mechanism is used to adjust the translation of the lower fixture 22 along the X-axis, the V-axis adjustment mechanism is used to adjust the translation of the lower fixture 22 along the Y-axis, and the W-axis adjustment mechanism is used to adjust the height and tilt angle of the lower fixture 22 along the Z-axis. Through the coordinated adjustment of the UVW leveling device, the precise position adjustment and angle correction of the lower fixture 22 in the horizontal plane can be achieved, ensuring the installation accuracy of the probe card. The adjustment accuracy of the UVW leveling device can typically reach 0.01 mm, meeting the requirements of high-precision detection.

[0044] By adopting the above technical solution and setting a UVW leveling device, the three-dimensional position of the lower fixture 22 can be finely adjusted, thereby improving the positioning accuracy of the probe card and meeting the requirements of high-precision display panel detection.

[0045] In the specific implementation process, a positioning and conduction device 23 is provided below the lower fixture 22. The positioning and conduction device 23 is located between the lower fixture 22 and the probe card body 41 to realize the circuit conduction between the probe card and the detection equipment. The positioning and conduction device 23 includes conductive contacts, wires and connectors. The conductive contacts cooperate with the conduction socket 42 on the probe card body 41 to form a reliable electrical connection. The wires connect the conductive contacts to the connectors. The connectors are connected to the signal cables of the detection equipment. The positioning and conduction device 23 adopts an elastic contact structure to ensure that it can maintain a good conduction state in any position.

[0046] By adopting the above technical solution and setting the positioning and conduction device 23, a reliable electrical connection between the probe card and the detection equipment is achieved, ensuring the normal transmission of the detection signal and avoiding the problem of poor contact.

[0047] In the specific implementation process, positioning clamping devices 24 are also equidistantly arranged on the lower fixture 22. The positioning clamping devices 24 are used to accurately position and clamp the probe card. Multiple sets of positioning clamping devices 24 are equidistantly arranged and evenly distributed at the four corners or edges of the lower fixture 22. The positioning clamping devices 24 can adopt pneumatic clamping mechanisms or electric clamping mechanisms, including clamping blocks, clamping arms and driving devices. The clamping blocks contact the edge of the probe card body 41. The clamping and releasing actions are realized by the swing of the clamping arms. The positioning clamping devices 24 are also provided with positioning pins, which cooperate with the positioning holes on the probe card body 41 to realize the accurate positioning of the probe card.

[0048] By adopting the above technical solution, the positioning and clamping device 24 is set to enable the rapid clamping and release of the probe card, ensuring the positional stability of the probe card during the detection process.

[0049] In some preferred embodiments of this application, reference is made to Figure 1 , Figure 2 and Figure 4 The lower fixture 22 is equipped with a probe card body 41 via a positioning and clamping device 24. The probe card body 41 is the core component of the probe card, carrying the detection probe 52 and the conductive socket 42. The probe card body 41 is usually made of PCB board or ceramic substrate, which has good insulation and stability. Circuit traces are provided on the probe card body 41 to electrically connect the conductive socket 42 to the detection probe 52.

[0050] In the specific implementation process, the probe card body 41 is provided with a conductive socket 42 that is electrically connected to the positioning and conductive device 23. The conductive socket 42 is located on the lower surface or side of the probe card body 41 and is used to connect with the conductive contacts of the positioning and conductive device 23. The conductive socket 42 is usually in the form of a pin seat or socket, and has a positioning and guiding function to facilitate quick insertion and removal. The number and arrangement of the conductive sockets 42 are determined according to the testing requirements. Usually, multiple sets are provided to meet the testing requirements of display panels of different specifications.

[0051] By adopting the above technical solution, the probe card and the positioning and conduction device 23 can be quickly connected and aligned by setting the conduction port 42, thus ensuring the reliability of electrical conduction.

[0052] In the specific implementation process, multiple sets of detection probes 52 are equidistantly arranged at the front end of the probe card body 41. The detection probes 52 are the components that contact the test contacts of the probe card with the display panel and are used to transmit detection signals. The detection probes 52 are equidistantly arranged and correspond one-to-one with the test contacts on the display panel. The detection probes 52 are usually made of tungsten steel, beryllium copper or nickel alloy materials, which have good conductivity and elasticity. The front end of the detection probes 52 is sharp or spherical, which facilitates precise contact with the display panel contacts.

[0053] By adopting the above technical solution, the electrical connection between the probe card and the display panel is realized by setting the detection probe 52, and the transmission of detection signals is completed.

[0054] In some preferred embodiments of this application, reference is made to Figure 4 and Figure 5 The detection probe 52 is connected to the probe card body 41 via an adjustment assembly. The adjustment assembly includes a first mounting base 51, a connecting base 53, and a second mounting base 54. The adjustment assembly is used to achieve three-dimensional position adjustment of the detection probe 52, facilitating quick alignment of the detection probe 52 with the display panel contacts.

[0055] In the specific implementation process, the adjustment component includes first mounting seats 51 equidistantly disposed at the front end of the probe card body 41. The first mounting seats 51 are fixedly disposed at the front end of the probe card body 41 and are positioned together with the probe card body 41. The first mounting seats 51 are provided with a connecting structure for connecting to the connecting seat 53. The number of first mounting seats 51 matches the number of detection probes 52 and are arranged equidistantly.

[0056] By adopting the above technical solution, the first mounting base 51 is set as a fixed fulcrum for the adjustment component, providing support for the installation of the detection probe 52.

[0057] In the specific implementation process, the first mounting base 51 is connected to the connecting base 53 through a Z-axis adjustment mechanism. The Z-axis adjustment mechanism is used to adjust the up and down movement of the connecting base 53 along the Z-axis direction, thereby adjusting the distance between the detection probe 52 and the display panel. The Z-axis adjustment mechanism includes a threaded hole 72 opened on the connecting base 53, and an adjusting screw 71 is threadedly engaged on the first mounting base 51. The adjusting screw 71 engages with the threaded hole 72. Rotating the adjusting screw 71 can drive the connecting base 53 to move up and down. The adjusting screw 71 is provided with a scale or limit device to facilitate precise control of the adjustment amount.

[0058] By adopting the above technical solution and setting a Z-axis adjustment mechanism, the distance between the detection probe 52 and the display panel can be precisely adjusted, ensuring the accuracy of the contact pressure.

[0059] In the specific implementation process, the connecting seat 53 is provided with a second mounting seat 54 through the X and Y axis adjustment mechanism. The X and Y axis adjustment mechanism is used to adjust the movement of the second mounting seat 54 along the X and Y axis directions, thereby adjusting the position of the detection probe 52 in the horizontal plane. The second mounting seat 54 is located above the connecting seat 53 and is connected to the connecting seat 53 through the X and Y axis adjustment mechanism. The detection probe 52 is located on the front side wall of the second mounting seat 54.

[0060] By adopting the above technical solution, the X and Y axis adjustment mechanisms can be set to achieve precise position adjustment of the detection probe 52 in the horizontal plane, which facilitates the quick alignment of the detection probe 52 with the display panel contacts.

[0061] In some preferred embodiments of this application, reference is made to Figure 5 and Figure 6 The connecting seat 53 has symmetrical through holes at both ends of the threaded hole 72, and a spring 73 is installed in the through hole. The top of the spring 73 abuts against the bottom of the first mounting seat 51, and the spring 73 plays a role in buffering and resetting.

[0062] In the specific implementation process, the setting position and number of springs 73 are determined according to the adjustment stroke and elastic force requirements. Springs 73 are symmetrically set at both ends of the threaded hole 72 to ensure the balance of force. The elastic force of springs 73 is selected according to the contact pressure requirements between the detection probe 52 and the display panel, and is usually set between 0.5 Newtons and 5 Newtons. When the rotating adjusting screw 71 drives the connecting seat 53 to move, the springs 73 are compressed or stretched, generating a reverse force to ensure that the pressure when the detection probe 52 contacts the display panel is uniform and stable.

[0063] By adopting the above technical solution, the spring 73 is set to buffer the contact between the detection probe 52 and the display panel, so as to avoid damage to the display panel caused by excessive contact pressure, and at the same time ensure the consistency of contact pressure of each detection probe 52.

[0064] In some preferred embodiments of this application, reference is made to Figure 5 and Figure 6 The X and Y axis adjustment mechanism includes a second mounting hole 62 formed on the second mounting base 54. The connecting base 53 has a first mounting hole 61 that matches the second mounting hole 62, and the diameter of the second mounting hole 62 is larger than the diameter of the first mounting hole 61.

[0065] In practice, the first mounting hole 61 has a smaller diameter, typically 3 to 5 millimeters. The second mounting hole 62 has a larger diameter, typically 5 to 8 millimeters. This difference in diameter creates an adjustment gap, allowing the second mounting base 54 to move relative to the connecting base 53 within a certain range. The shape of the second mounting hole 62 can be set to circular, elliptical, or oblong depending on the adjustment requirements. An elliptical or oblong second mounting hole 62 can provide a larger adjustment range.

[0066] By adopting the above technical solution, by setting the first mounting hole 61 and the second mounting hole 62 with different apertures, an adjustment gap is formed, which facilitates the alignment and adjustment of the detection probe 52 with the center of the contact point with the positioning camera 34.

[0067] In the specific implementation process, an adjusting bolt 63 is provided between the first mounting hole 61 and the second mounting hole 62, and a washer is provided on the adjusting bolt 63. The adjusting bolt 63 passes through the second mounting hole 62 and connects with the threaded hole on the connecting seat 53. The washer is placed between the head of the adjusting bolt 63 and the surface of the second mounting seat 54, which serves to position and prevent loosening. By adjusting the position of the adjusting bolt 63 in the second mounting hole 62, the second mounting seat 54 can be moved along the X-axis and Y-axis directions to achieve fine adjustment of the planar position of the detection probe 52. There are usually multiple sets of adjusting bolts 63, distributed in different positions of the second mounting seat 54, so as to achieve multi-directional adjustment.

[0068] By adopting the above technical solution, the planar position of the detection probe 52 can be precisely adjusted by setting the adjusting bolt 63 and the shim, and the adjustment is convenient and quick.

[0069] In some preferred embodiments of this application, reference is made to Figure 1 and Figure 3 The gantry 12 is also equipped with a positioning mechanism, which is used to monitor the alignment of the detection probe 52 with the display panel contact point and assist in achieving automated alignment.

[0070] In the specific implementation process, the positioning mechanism includes a mounting bracket 31 installed on the gantry 12. The mounting bracket 31 is fixedly installed on the crossbeam of the gantry 12, forming a stable support structure together with the gantry 12. The mounting bracket 31 is equipped with slide rails and sliders for installing and guiding the moving plate 33.

[0071] By adopting the above technical solution, the mounting frame 31 is set up as the installation support platform for the positioning mechanism.

[0072] In the specific implementation process, the mounting frame 31 is symmetrically equipped with movable plates 33 via the drive device 32. There are two sets of drive devices 32, which are symmetrically installed on both sides of the mounting frame 31 to drive the two movable plates 33 to move synchronously or independently. The drive device 32 can be a motor-driven lead screw mechanism, a servo motor-driven linear guide mechanism, or a pneumatic drive mechanism. The movable plates 33 are located below the mounting frame 31 and can move up and down in the vertical direction under the drive of the drive device 32.

[0073] By adopting the above technical solution, the lifting and lowering adjustment of the positioning camera 34 can be realized by setting the driving device 32 and the moving plate 33 to adapt to display panels of different heights.

[0074] In the specific implementation process, a positioning camera 34 is set on the side wall of the moving plate 33. The positioning camera 34 can be an industrial CCD camera or a CMOS camera with high resolution and measurement accuracy. The lens of the positioning camera 34 is aligned with the detection area of ​​the detection probe 52 and the display panel, and can capture images of the relative positions of the detection probe 52 and the contact points of the display panel. The image data of the positioning camera 34 is transmitted to the control system. The alignment deviation between the detection probe 52 and the contact points is analyzed by the image processing algorithm and fed back to the UVW leveling device for position correction, so as to realize automated alignment.

[0075] By adopting the above technical solution, and by setting up a positioning camera 34, the alignment of the detection probe 52 and the display panel contact can be monitored in real time, thereby achieving automated alignment and improving alignment accuracy and efficiency.

[0076] In some preferred embodiments of this application, reference is made to Figure 3 The mounting bracket 31 is provided with a cover plate 35 on the outside, which covers the movable plate 33. The cover plate 35 is made of metal material, such as aluminum alloy or stainless steel, which has good strength and rigidity. The cover plate 35 is connected to the mounting bracket 31 by bolts or buckles, which makes it easy to disassemble and assemble.

[0077] In practical implementation, the main function of the cover plate 35 is to shield and protect the drive unit 32. Specifically, the cover plate 35 is installed outside the mounting bracket 31, covering the drive unit 32 from above and around it, forming a protective shield. During operation, the drive unit 32 generates heat and dust. The cover plate 35 prevents dust, debris, and liquids from splashing into the drive unit 32, thus avoiding affecting its normal operation and service life. Simultaneously, the cover plate 35 also prevents operators from accidentally touching the drive unit 32, improving operational safety.

[0078] In practical implementation, the design of the cover plate 35 does not affect the reciprocating movement of the drive device 32 carrying the moving plate 33. Sufficient clearance is reserved between the cover plate 35 and the moving plate 33 to ensure that the moving plate 33 will not interfere with the cover plate 35 during its up-and-down movement. The cover plate 35 can be configured as a split structure or adopt a slotted design to accommodate the movement stroke of the moving plate 33. The cover plate 35 can also be provided with guide grooves or protective sleeves to guide the movement trajectory of the moving plate 33 and further improve the stability of the movement.

[0079] By adopting the above technical solution, a cover plate 35 is set on the outside of the mounting frame 31 to shield and protect the drive device 32, prevent dust and debris from entering, ensure the working stability and service life of the drive device 32, and at the same time, it does not affect the drive device 32 to drive the moving plate 33 to move back and forth, ensuring the smooth movement of the positioning mechanism.

[0080] In some preferred embodiments of this application, reference is made to Figure 1 and Figure 4 The probe card body 41 has alignment components symmetrically arranged at both ends of the detection probe 52. The alignment components are used to assist in the installation and alignment of the detection probe 52.

[0081] In practical implementation, the alignment assembly includes fixing plates 43 symmetrically arranged at both ends of the probe card body 41. The fixing plates 43 are fixedly disposed at both ends of the probe card body 41 and are mounted together with the probe card body 41 on the lower fixture 22. The fixing plates 43 are provided with mounting holes and positioning grooves for mounting the alignment camera 44. The fixing plates 43 are typically made of metal and have good rigidity.

[0082] Using the above technical solution, a fixing plate 43 is set to provide installation support for the alignment camera 44.

[0083] In the specific implementation process, a positioning camera 44 is provided at the end of the fixing plate 43. The positioning camera 44 can be an industrial CCD camera or a CMOS camera with high resolution. The lens of the positioning camera 44 is aimed at the mounting area of ​​the probe card body 41 and the detection probe 52, and can capture images of the installation position of the detection probe 52. The image data of the positioning camera 44 is transmitted to the control system to assist the operator in installing and debugging the probe card.

[0084] By adopting the above technical solution and setting up the alignment camera 44, the installation and debugging of the probe card are facilitated, thereby improving work efficiency.

[0085] The working process of this invention is as follows: First, the display panel conveying device 13 transports the display panel to be tested to the testing station and performs precise positioning and lifting operations. The probe card conveying device 14 transports the probe card from the storage position to the installation positions of the upper fixture 21 and the lower fixture 22. The probe card body 41 is fixed to the lower fixture 22 by the positioning clamping device 24, and the conductive socket 42 is electrically connected to the positioning conductive device 23.

[0086] Then, the positioning mechanism begins operation. The drive unit 32 drives the moving plate 33 to descend, and the positioning camera 34 aligns with the incident detection area. The positioning camera 34 captures an image of the relative position of the detection probe 52 and the display panel contact point. The control system analyzes the image to determine the alignment deviation and adjusts the position of the lower fixture 22 through the UVW leveling device to eliminate the alignment deviation. The cover plate 35 protects the drive unit 32 throughout the process to prevent dust from entering.

[0087] Next, the probe 52 adjustment assembly begins operation. The Z-axis position of the probe 52 is adjusted via the Z-axis adjustment mechanism to bring it into contact with the display panel contacts. The planar position of the probe 52 is adjusted via the X and Y-axis adjustment mechanisms, and in conjunction with the monitoring of the positioning camera 34, the probe 52 is precisely aligned with the center of the display panel contacts.

[0088] Finally, the testing equipment sends a test signal to the probe card, and the test probe 52 transmits the signal to the test contact of the display panel to complete the electrical performance test. After the test is completed, the positioning clamping device 24 is released, the probe card conveying device 14 takes away the probe card, and the display panel conveying device 13 conveys the tested display panel to the next station.

[0089] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A probe card precise positioning device for display panel inspection, characterized in that: The device includes a base (11), one end of which is provided with a display panel conveying device (13), and the other end of which is provided with a probe conveying device (14). A gantry frame (12) is also provided on the base (11), and a probe card positioning assembly is provided below the gantry frame (12). The probe card positioning assembly includes an upper fixture (21) provided below the gantry frame (12). The upper fixture (21) is provided with a lower fixture (22) through a UVW leveling device. A positioning and guiding device (23) is provided below the lower fixture (22), and a positioning clamping device (24) is also provided at equal intervals on the lower fixture (22).

2. The probe card precise positioning device for display panel testing according to claim 1, characterized in that: The lower fixture (22) is provided with a probe card body (41) through the positioning clamping device (24). The probe card body (41) is provided with a conductive socket (42) that is electrically connected to the positioning conductive device (23). Multiple sets of detection probes (52) are equidistantly arranged at the front end of the probe card body (41).

3. The probe card precise positioning device for display panel testing according to claim 2, characterized in that: The detection probe (52) is connected to the probe card body (41) through an adjustment component. The adjustment component includes a first mounting seat (51) equidistantly disposed at the front end of the probe card body (41). The first mounting seat (51) is connected to a connecting seat (53) through a Z-axis adjustment mechanism. The connecting seat (53) is provided with a second mounting seat (54) through an X and Y-axis adjustment mechanism. The detection probe (52) is disposed on the front side wall of the second mounting seat (54).

4. The probe card precise positioning device for display panel testing according to claim 3, characterized in that: The Z-axis adjustment mechanism includes a threaded hole (72) on the connecting seat (53), and an adjusting screw (71) is threadedly engaged on the first mounting seat (51), the adjusting screw (71) engaging with the threaded hole (72).

5. A probe card precise positioning device for display panel testing according to claim 4, characterized in that: The connecting seat (53) has through holes symmetrically opened at both ends of the threaded hole (72), and a spring (73) is provided in the through hole. The top of the spring (73) abuts against the bottom of the first mounting seat (51).

6. A probe card precise positioning device for display panel testing according to claim 3, characterized in that: The X and Y axis adjustment mechanism includes a second mounting hole (62) on the second mounting base (54), and a first mounting hole (61) matching the second mounting hole (62) is provided on the connecting base (53). The diameter of the second mounting hole (62) is larger than the diameter of the first mounting hole (61).

7. A probe card precise positioning device for display panel testing according to claim 6, characterized in that: An adjusting bolt (63) is provided between the first mounting hole (61) and the second mounting hole (62), and a shim is provided on the adjusting bolt (63).

8. A probe card precise positioning device for display panel testing according to claim 1, characterized in that: The gantry (12) is also provided with a positioning mechanism, which includes a mounting bracket (31) on the gantry (12). The mounting bracket (31) is symmetrically provided with a moving plate (33) via a drive device (32). A positioning camera (34) is provided on the side wall of the moving plate (33). The positioning camera (34) can capture images of the detection probe (52) aligned with the center of the contact point on the display panel.

9. A probe card precise positioning device for display panel testing according to claim 8, characterized in that: The mounting bracket (31) is provided with a cover plate (35) on the outside, and the cover plate (35) covers the movable plate (33).

10. A probe card precise positioning device for display panel testing according to claim 2, characterized in that: The probe card body (41) is symmetrically provided with alignment components at both ends of the detection probe (52). The alignment components include fixing plates (43) symmetrically provided at both ends of the probe card body (41), and an alignment camera (44) is provided at the end of the fixing plate (43).

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