An under-screen fingerprint lens detection device

Abstract

The present invention relates to the field of optical lens technology, and specifically to an under-screen fingerprint lens detection device. It includes an outer frame, an upper Z-axis mechanism, an XY-axis mechanism, a lower Z-axis mechanism and a collimator mechanism, wherein the upper Z-axis mechanism, the XY-axis mechanism, the lower Z-axis mechanism and the collimator mechanism are all fixed on a main substrate inside the outer frame; the upper Z-axis mechanism is connected to a light source generator through a light source line; a detection component for detecting an under-screen fingerprint lens is provided on the lower Z-axis mechanism; an under-screen fingerprint lens to be detected is placed on the XY-axis mechanism, and the XY-axis mechanism is arranged between the upper Z-axis mechanism and the lower Z-axis mechanism, so that the axis of the light source emitting surface of the light source line, the axis of the light source receiving surface of the detection component, and the axis of the under-screen fingerprint lens coincide; the collimator mechanism is used to calibrate the horizontality of the upper Z-axis mechanism, the lower Z-axis mechanism and the XY-axis mechanism. The present invention can meet the detection of under-screen fingerprint lenses of various specifications currently on the market.

Description

Technical Field

[0001] The present invention relates to the field of optical lens technology, and in particular to an under-screen fingerprint lens detection device. Background Art

[0002] With the rapid development of mobile devices, mobile phones, tablet computers and other mobile devices are gradually becoming thinner, lighter and more beautiful. This has led to the internal structure of the device becoming more and more compact, and the optical components in the device also need to reduce their own volume.

[0003] Optical components need to be inspected for quality before leaving the factory. Existing inspection equipment is mainly used to inspect camera lenses for electronic devices. Using existing inspection equipment to inspect under-screen fingerprint lenses with image heights less than 5mm will cause serious data deviations, so existing inspection equipment is no longer suitable for the inspection of under-screen fingerprint lenses. There is currently no suitable inspection equipment for under-screen fingerprint lenses with image heights less than 5mm. Summary of the invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an under-screen fingerprint lens detection device.

[0005] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0006] The present invention provides an under-screen fingerprint lens detection device, comprising an outer frame, an upper Z-axis mechanism, an XY-axis mechanism, a lower Z-axis mechanism and a collimator mechanism, wherein the upper Z-axis mechanism, the XY-axis mechanism, the lower Z-axis mechanism and the collimator mechanism are all fixed on a main substrate inside the outer frame; the upper Z-axis mechanism is connected to a light source generator through a light source line, the light source line is driven to move along the Z-axis direction through the upper Z-axis mechanism, and the upper Z-axis mechanism is also used to adjust the distance the light source line moves along the X-axis and Y-axis directions; a detection component for detecting the under-screen fingerprint lens is arranged on the lower Z-axis mechanism, and the detection component is driven to move along the X-axis and Y-axis directions through the lower Z-axis mechanism Drive the detection component to move along the Z-axis direction; the under-screen fingerprint lens to be detected is placed on the XY-axis mechanism, and the XY-axis mechanism is arranged between the upper Z-axis mechanism and the lower Z-axis mechanism. The under-screen fingerprint lens is driven to move along the X-axis and Y-axis directions through the XY-axis mechanism, so that the axis of the light source emitting surface of the light source line, the axis of the light source receiving surface of the detection component, and the axis of the under-screen fingerprint lens coincide with each other; the collimator mechanism is used to calibrate the horizontality of the upper Z-axis mechanism, the lower Z-axis mechanism, and the XY-axis mechanism, so that the light source emitting surface of the light source line, the light source receiving surface of the detection component and the surface of the under-screen fingerprint lens are parallel.

[0007] Furthermore, the upper Z-axis mechanism includes an upper Z-axis main support frame, a light source line support, a servo motor, a linear module, a cross-roller slide and a top screw leveling and fixing assembly. The upper Z-axis main support frame is fixed on the main base plate, and a servo motor and a linear module connected to the servo motor are arranged on one side of the upper Z-axis main support frame; the upper part of the linear module is connected to the light source line support for fixing the light source line; the moving part of the linear module is connected to the cross-roller slide, one side of the cross-roller slide is connected to the top screw leveling and fixing assembly, the upper part of the top screw leveling and fixing assembly is connected to the light source line, and the lower part of the top screw leveling and fixing assembly is connected to the dividing plate; the servo motor drives the linear module to move along the Z-axis direction, thereby driving the cross-roller slide, the top screw leveling and fixing assembly and the light source line to move along the Z-axis direction; the cross-roller slide is used to adjust the moving distance of the top screw leveling and fixing assembly along the X-axis and Y-axis directions.

[0008] Furthermore, the top screw leveling fixing assembly includes a fixing seat, a light source wire sleeve and a leveling disk, one side wall of the fixing seat is fixed to the cross roller type slide, the bottom wall of the fixing seat is connected to the leveling disk, and the horizontality of the leveling disk is adjusted by the leveling screw, the light source wire sleeve is embedded in the middle through hole of the leveling disk, the light source wire is inserted into the light source wire sleeve and fixed to the light source wire sleeve.

[0009] Furthermore, the upper part of the leveling disk is a disk structure, and the lower part of the leveling disk is a cylindrical structure; a groove is provided on the lower end surface of the cylindrical structure for installing a dividing plate; a plurality of screw holes are provided on the disk structure, and the leveling screws pass through the screw holes on the disk structure and abut against the bottom wall of the fixing seat, and the horizontality of the bottom surface of the leveling disk is adjusted by turning the leveling screws, and the locking screws pass through the screw holes on the disk structure and are locked and fixed to the bottom wall of the fixing seat.

[0010] Furthermore, a V-shaped groove matching the leveling screw is formed on the bottom wall of the fixing seat, and the bottom end of the leveling screw abuts against the V-shaped groove to prevent the leveling disk from rotating.

[0011] Furthermore, the XY-axis mechanism includes a tray, an X-axis moving assembly, a Y-axis moving assembly and a limit assembly. The tray is provided with a lens hole for placing the under-screen fingerprint lens. The tray is fixed above the X-axis moving assembly, and the tray is driven to move along the X-axis through the X-axis moving assembly; the X-axis moving assembly is fixed above the Y-axis moving assembly, and the X-axis moving assembly and the tray are driven to move along the Y-axis through the Y-axis moving assembly; both the X-axis moving assembly and the Y-axis moving assembly are provided with limit assemblies for limiting the moving distances of the X-axis moving assembly and the Y-axis moving assembly.

[0012] Furthermore, the X-axis moving assembly includes an X-axis linear motor, an X-axis linear slide, and an upper frame; the X-axis linear motor is fixed on the middle frame of the Y-axis moving assembly, the first moving axis of the X-axis linear motor is fixed to the upper frame, the upper frame is slidably arranged on the upper part of the X-axis linear slide, the X-axis linear slide is fixed on the middle frame, and the upper frame is driven by the X-axis linear motor to reciprocate along the X-axis linear slide.

[0013] Furthermore, the Y-axis moving assembly includes a Y-axis linear motor, a Y-axis linear slide, and a middle-level frame; the Y-axis linear motor is fixed on the lower-level frame, the second moving axis of the Y-axis linear motor is fixed to the middle-level frame, the middle-level frame is slidably arranged on the upper part of the Y-axis linear slide, the Y-axis linear slide is fixed on the lower-level frame, and the Y-axis linear motor drives the middle-level frame to reciprocate along the Y-axis linear slide.

[0014] Furthermore, the limit assembly includes a sensing plate and a sensing switch. The sensing plates are respectively arranged on the upper frame of the X-axis moving assembly and the middle frame of the Y-axis moving assembly. The sensing switches are respectively arranged on the middle frame and the lower frame. When the sensing plate slides to the sensing switch, it moves in the opposite direction.

[0015] Furthermore, the lower Z-axis mechanism includes a lower Z-axis fixed frame, a lower Z-axis linear motor, a motor sliding plate, a fixed frame and an adjusting frame. The upper part of the lower Z-axis fixed frame is fixed to the main baseboard, one side of the lower Z-axis fixed frame is fixed to the lower Z-axis linear motor, the lower Z-axis linear motor is connected to the motor sliding plate, and the motor sliding plate is driven by the lower Z-axis linear motor to slide along the Z-axis direction; the motor sliding plate is connected to the fixed frame, and an adjusting frame is arranged above the fixed frame, and a detection component is fixed on the adjusting frame, and the horizontality of the detection component is adjusted by a leveling screw.

[0016] The beneficial effect of the present invention is that the present invention provides an under-screen fingerprint lens detection device, which detects the performance quality of the under-screen fingerprint lens by object-side incidence. The device is mainly based on the detection component consisting of the optical objective lens group and CCD below receiving the image after the light source with identification passes through the under-screen fingerprint lens, and analyzes the quality of the lens according to the image clarity. The present invention can detect all lenses within the image height of 5mm and the focal length of the under-screen fingerprint lens within 2.1mm, and can meet the detection of various specifications of under-screen fingerprint lenses currently on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an under-screen fingerprint lens detection device of the present invention.

[0018] Figure 2 It is an exploded schematic diagram of the upper Z-axis mechanism, the XY-axis mechanism, the lower Z-axis mechanism and the collimator mechanism of the present invention.

[0019] Figure 3It is a structural schematic diagram of the upper Z-axis mechanism of the present invention.

[0020] Figure 4 It is a side view of the top screw leveling fixing assembly of the upper Z-axis mechanism of the present invention.

[0021] Figure 5 for Figure 4 AA section view.

[0022] Figure 6 for Figure 5 Enlarged view of point B.

[0023] Figure 7 It is a schematic structural diagram of the XY axis mechanism of the present invention.

[0024] Figure 8 It is an exploded view of the XY axis mechanism of the present invention.

[0025] Fig. 9 It is a structural schematic diagram of the lower Z-axis mechanism of the present invention.

[0026] Fig.10 It is a structural schematic diagram of the collimator mechanism of the present invention.

[0027] Fig.11 It is a structural schematic diagram of the outer frame of the present invention.

[0028] Fig.12 This is a detection principle diagram of an under-screen fingerprint lens detection device of the present invention.

[0029] In the figure:

[0030] 1. Outer frame; 11. Upper keel; 12. Lower keel; 13. Main base plate; 14. Spherical shock-absorbing pad; 15. Caster shock-absorbing pad; 16. Caster;

[0031] 2. Upper Z-axis mechanism; 21. Upper Z-axis main support frame; 22. Light source line bracket; 23. Servo motor; 24. Linear module; 25. Cross roller slide; 26. Top screw leveling fixing assembly; 261. Fixing seat; 2611. Side wall; 2612. Bottom wall; 2613. V-shaped groove; 262. Light source line sleeve; 263. Leveling disk; 2631. Disc structure; 2632. Cylinder structure; 2633. Groove; 2634. Screw hole; 264. Leveling screw;

[0032] 3. XY axis mechanism; 31. tray; 311. lens hole; 32. X axis moving assembly; 321. X axis linear motor; 3211. first moving axis; 322. X axis linear slide; 323. upper frame; 33. Y axis moving assembly; 331. Y axis linear motor; 3311. second moving axis; 332. Y axis linear slide; 333. middle frame; 334. lower frame; 34. limit assembly; 341. induction sheet; 342. induction switch;

[0033] 4. Lower Z-axis mechanism; 41. Lower Z-axis fixing frame; 42. Lower Z-axis linear motor; 43. Motor sliding plate; 44. Fixing frame; 45. Adjusting frame;

[0034] 5. Collimator mechanism; 51. Collimator body; 52. Machine fixing seat; 53. Fixing handle;

[0035] 6. Light source generator;

[0036] 7. Industrial computer;

[0037] 8. Motor driver;

[0038] 9. Optical objective lens group;

[0039] 10.CCD. DETAILED DESCRIPTION

[0040] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0041] The Z axis defined in the specific implementation manner of the present invention is a vertical direction, the X axis is a horizontal direction perpendicular to the Z axis, and the Y axis is a horizontal direction perpendicular to the X axis.

[0042] Embodiment 1:

[0043] Reference Figure 1 and Figure 2The present invention provides an under-screen fingerprint lens detection device. The detection device includes an outer frame 1, an upper Z-axis mechanism 2, an XY-axis mechanism 3, a lower Z-axis mechanism 4 and a collimator mechanism 5. The upper Z-axis mechanism 2, the XY-axis mechanism 3, the lower Z-axis mechanism 4 and the collimator mechanism 5 are all fixed on the main substrate 13 inside the outer frame 1. Among them, the upper Z-axis mechanism 2, the XY-axis mechanism 3 and the collimator mechanism 5 are all fixed above the main substrate 13, and the lower Z-axis mechanism 4 is fixed below the main substrate 13. The upper Z-axis mechanism 2 is connected to the light source generator 6 arranged in the lower keel 12 of the outer frame 1 through a light source line, and the light source line is driven to move along the Z-axis direction through the upper Z-axis mechanism 2, and the upper Z-axis mechanism 2 is also used to adjust the distance that the light source line moves along the X-axis and Y-axis directions. A detection component for detecting the under-screen fingerprint lens is arranged on the lower Z-axis mechanism 4, and the detection component is driven to move along the Z-axis direction through the lower Z-axis mechanism 4. The under-screen fingerprint lens to be detected is placed on the XY-axis mechanism 3, and the XY-axis mechanism 3 is arranged between the upper Z-axis mechanism 2 and the lower Z-axis mechanism 4. The under-screen fingerprint lens is driven to move along the X-axis and Y-axis directions through the XY-axis mechanism 3 so that the axis of the light source emitting surface of the light source line, the axis of the receiving light source surface of the detection component, and the axis of the under-screen fingerprint lens coincide; the collimator mechanism 5 is used to calibrate the horizontality of the upper Z-axis mechanism 2, the lower Z-axis mechanism 4, and the XY-axis mechanism 3 so that the light source emitting surface of the light source line, the receiving light source surface of the detection component and the surface of the under-screen fingerprint lens are parallel.

[0044] The specific structure of the upper Z-axis mechanism 2 is introduced below:

[0045] Reference Figure 2-Figure 6The upper Z-axis mechanism 2 includes an upper Z-axis main support frame 21, a light source line support 22, a servo motor 23, a linear module 24, a cross roller slide 25 and a top screw leveling fixing assembly 26. The lower end of the upper Z-axis main support frame 21 is fixed on the main base plate 13, one side of the upper Z-axis main support frame 21 is connected to the fixed support of the linear module 24, the upper part of the fixed support of the linear module 24 is connected to the servo motor 23 and the light source line support 22, the output shaft of the servo motor 23 is connected to the rotating shaft of the linear module 24, the sliding block of the linear module 24 is sleeved on the rotating shaft of the linear module 24, the rotating shaft of the linear module 24 is driven by the servo motor 23 to rotate, and then the sliding block of the linear module 24 is driven to move along the Z axis. The upper part of the linear module 24 is connected to the light source line support 22 for fixing the light source line. The upper part of the light source line bracket 22 is a flat plate with a through hole, which plays the role of limiting the light source line. The light source line passes through the through hole and is connected to the top screw leveling fixing assembly 26 to achieve the fixation of the light-emitting end and the wear-free light source line. The moving part of the linear module 24 (i.e., the sliding block of the linear module 24) is connected to the cross roller type slide 25, one side of the cross roller type slide 25 is connected to the top screw leveling fixing assembly 26, the upper part of the top screw leveling fixing assembly 26 is connected to the light source line, and the lower part of the top screw leveling fixing assembly 26 is connected to the dividing plate. The moving part of the linear module 24 is driven by the servo motor 23 to move along the Z axis, thereby driving the cross roller type slide 25, the top screw leveling fixing assembly 26 and the light source line to move along the Z axis. The cross roller type slide 25 is used to adjust the distance that the top screw leveling fixing assembly 26 moves along the X axis and Y axis. The cross roller slide 25 of the present invention is a prior art, and any one of them can be used as long as it can achieve the movement of the top screw leveling fixing assembly 26 along the X-axis and Y-axis directions.

[0046] The light source on the bottom of the grating plate of the present invention is parallel light, the object side of the under-screen fingerprint lens (ultra-short objective lens or ultra-short back focus lens) faces upward and is perpendicular to the center of the grating plate, and the optical path is based on the principle of positive projection imaging. The grating plate is equipped with standard grating lines, and the quality level of the lens is determined by analyzing various parameter indicators through lens imaging and formulating parameter control ranges.

[0047] The top screw leveling fixing assembly 26 includes a fixing seat 261, a light source line sleeve 262 and a leveling disk 263. A side wall 2611 of the fixing seat 261 is fixed to the cross roller type slide 25, and a bottom wall 2612 of the fixing seat 261 is connected to the leveling disk 263, and the horizontality of the leveling disk 263 is adjusted by a leveling screw 264. Specifically, a V-shaped groove 2613 matching the bottom end of the leveling screw 264 is provided on the bottom wall 2612 of the fixing seat 261, and the bottom end of the leveling screw 264 abuts in the V-shaped groove 2613 to prevent the leveling disk 263 from rotating in the horizontal direction. The upper part of the leveling disk 263 is a disk structure 2631 with a through hole in the middle, and the lower part of the leveling disk 263 is a cylindrical structure 2632. A groove 2633 is provided on the lower end surface of the cylindrical structure 2632 for mounting a sub-engraving plate. A plurality of screw holes 2634 are provided on the disk structure 2631. The leveling screws 264 pass through the screw holes 2634 on the disk structure 2631 and abut against the V-shaped grooves 2613 of the bottom wall 2612 of the fixing seat 261. The horizontality of the sub-plate at the bottom of the leveling disk 263 is adjusted by turning the leveling screws 264. The locking screws pass through the screw holes 2634 on the disk structure 2631 and the screw holes 2634 on the bottom wall 2612 of the fixing seat 261 to lock and fix the adjusted leveling disk 263 to the fixing seat 261. In this embodiment, six screw holes 2634 are provided on the disk structure 2631, three of which are used to install the leveling screws 264, and the other three are used to install the locking screws. In order to ensure the leveling effect, the leveling screws 264 and the locking screws are arranged at intervals. The light source wire sleeve 262 is embedded in the middle through hole of the leveling plate 263 , and the light source wire is inserted into the light source wire sleeve 262 and fixed to the light source wire sleeve 262 by bolts.

[0048] The specific structure of the XY axis mechanism 3 is introduced below:

[0049] Reference Figure 2 , Figure 7 and Figure 8 , the XY axis mechanism 3 includes a tray 31, an X-axis moving assembly 32, a Y-axis moving assembly 33 and a limit assembly 34. Among them, the tray 31 is provided with a plurality of lens holes 311 arranged in a matrix for placing the fingerprint lens under the screen, and handles are provided on both sides of the tray 31 to facilitate the installation and removal of the tray 31. The tray 31 is fixed above the X-axis moving assembly 32, and the tray 31 is driven to move along the X-axis by the X-axis moving assembly 32. The X-axis moving assembly 32 is fixed above the Y-axis moving assembly 33, and the X-axis moving assembly 32 and the tray 31 are driven to move along the Y-axis by the Y-axis moving assembly 33. The X-axis moving assembly 32 and the Y-axis moving assembly 33 are both provided with a limit assembly 34 for limiting the moving distance of the X-axis moving assembly 32 and the Y-axis moving assembly 33.

[0050] The X-axis moving assembly 32 includes an X-axis linear motor 321, an X-axis linear slide 322, and an upper frame 323. The X-axis linear motor 321 is fixed to the middle frame 333 of the Y-axis moving assembly 33, the first moving shaft 3211 of the X-axis linear motor 321 is fixed to the upper frame 323, the upper frame 323 is slidably arranged on the upper part of the X-axis linear slide 322, the X-axis linear slide 322 is fixed to both sides of the middle frame 333, and the upper frame 323 is driven to reciprocate along the X-axis linear slide 322 by the X-axis linear motor 321, thereby driving the tray 31 to reciprocate along the X-axis.

[0051] The Y-axis moving assembly 33 includes a Y-axis linear motor 331, a Y-axis linear slide 332, and a middle frame 333. The Y-axis linear motor 331 is fixed on the lower frame 334, and the lower frame 334 is fixed on the main substrate 13. The second moving shaft 3311 of the Y-axis linear motor 331 is fixed to the middle frame 333, and the middle frame 333 is slidably arranged on the upper part of the Y-axis linear slide 332. The Y-axis linear slide 332 is fixed on both sides of the lower frame 334. The Y-axis linear motor 331 drives the middle frame 333 to reciprocate along the Y-axis linear slide 332, thereby driving the upper frame 323 and the tray 31 to reciprocate along the Y axis. The middle parts of the upper frame 323, the middle frame 333, and the lower frame 334 are all open structures to allow light to pass through.

[0052] The limit assembly 34 is divided into two groups, which are used to limit the movement of the X-axis moving assembly 32 and the Y-axis moving assembly 33 respectively, and include a sensing sheet 341 and a sensing switch 342. For limiting the X-axis moving assembly 32: the sensing sheet 341 is arranged on the side of the upper frame 323 of the X-axis moving assembly 32 opposite to the X-axis linear motor 321, and the sensing switch 342 is arranged on the middle frame 333 on the side corresponding to the sensing sheet 341. When the X-axis linear motor 321 drives the upper frame 323 and the sensing sheet 341 thereon to move to the sensing switch 342 on the middle frame 333, the X-axis linear motor 321 reverses and drives the upper frame 323 to move in the opposite direction. For limiting the Y-axis moving assembly 33: the sensing sheet 341 is arranged on the side of the middle frame 333 of the Y-axis moving assembly 33 opposite to the Y-axis linear motor 331, and the sensing switch 342 is arranged on the lower frame 334 on the side corresponding to the sensing sheet 341. When the Y-axis linear motor 331 drives the middle frame 333 and the induction sheet 341 thereon to move to the induction switch 342 on the lower frame 334, the Y-axis linear motor 331 reverses and drives the middle frame 333 to move in the opposite direction.

[0053] The specific structure of the Z-axis mechanism 4 is introduced below:

[0054] Reference Figure 2 and Fig. 9, the lower Z-axis mechanism 4 includes a lower Z-axis fixed frame 41, a lower Z-axis linear motor 42, a motor sliding plate 43, a fixed frame 44 and an adjusting frame 45. The cross section of the lower Z-axis fixed frame 41 is an inverted L-shaped structure, the upper part of which is fixed to the main substrate 13, and one side of the lower Z-axis fixed frame 41 is fixed to the lower Z-axis linear motor 42. The lower Z-axis linear motor 42 is connected to the motor sliding plate 43, and the motor sliding plate 43 is driven by the lower Z-axis linear motor 42 to slide along the Z-axis direction. The motor sliding plate 43 is connected to the fixed frame 44, and an adjusting frame 45 is arranged above the fixed frame 44, and a detection component is fixed on the adjusting frame 45, and the horizontality of the detection component is adjusted by the leveling screw 264. Specifically, a V-shaped groove 2613 and a bolt hole are provided on the upper plate of the fixing frame 44, and a plurality of bolt holes are provided on the bottom plate of the adjusting frame 45. The leveling screw 264 passes through the bolt hole on the bottom plate of the adjusting frame 45 and abuts against the V-shaped groove 2613 on the upper plate of the fixing frame 44. The horizontality of the adjusting frame 45 is adjusted by adjusting the leveling screw 264, thereby adjusting the horizontality of the detection assembly on the adjusting frame 45. After the adjustment is completed, the fixing frame 44 and the adjusting frame 45 are locked and fixed by tightening the screws. In this embodiment, six bolt holes are provided on the bottom plate of the adjusting frame 45, three of which are used to install the leveling screw 264, and the other three are used to install the locking screw. In order to ensure the leveling effect, the leveling screw 264 and the locking screw are arranged at intervals.

[0055] The detection assembly of the present invention includes an optical objective lens group 9 and a CCD 10. The optical objective lens group 9 may include an objective lens and an industrial lens. The CCD 10 is installed below the optical objective lens group 9. The optical objective lens group 9 is detachably arranged on an adjustment frame 45. The adjustment frame 45 can adjust the back focus of the optical objective lens group 9 and the focal length of the CCD 10.

[0056] The specific structure of the collimator mechanism 5 is described below:

[0057] Reference Figure 2 and Fig.10 The collimator mechanism 5 includes a collimator body 51, a fixing handle 53, and a machine fixing seat 52. The machine fixing seat 52 is fixed on the main substrate 13, the collimator body 51 is movably arranged on a column above the machine fixing seat 52, and the fixing handle 53 is arranged at the upper end of the column, and the collimator body 51 is fixed by the fixing handle 53. The collimator mechanism 5 is an existing purchased equipment, and the present invention does not make too much introduction.

[0058] The specific structure of the outer frame 1 is introduced below:

[0059] Reference Fig.11The outer frame 1 includes an upper keel 11, a lower keel 12 and a main base plate 13. Among them, the lower keel 12 is designed as a 50*50*3 square tube, a 2mm U-shaped bent sheet metal, and a bottom plate of 25mm carbon structural steel plate. The upper keel 11 is only a 2mm U-shaped bent sheet metal. The structure of the outer frame 1 is designed to be heavy at the bottom and light at the top, which can improve the structural stability of the equipment and reduce vibration. Since the light source generator 6, the industrial computer 7 and the motor driver 8 need to be installed in the lower keel 12, an exhaust port is provided on the bent sheet metal of the lower keel 12, which is beneficial to the heat dissipation of the equipment. The light source generator 6, the industrial computer 7 and the motor driver 8 are all existing equipment, among which the light source generator 6 is used to generate a light source, the industrial computer 7 is used to control the operation of the detection equipment, and the motor driver 8 is used to drive the above-mentioned linear motor and servo motor. Four casters 16 are arranged below the lower keel 12, and the casters 16 are connected to the caster 16 shock-absorbing pads 15 with a design of 50Hz and an amplitude of 6mm. A spherical shock-absorbing pad is added between the upper keel 11 and the main base plate 13 to effectively reduce the influence of external and overall vibration on the test results.

[0060] The detection process of the present invention is:

[0061] Reference Figure 1 and Fig.12 , install the fingerprint lens under the screen to be tested in the tray 31, and fix the tray 31 on the XY axis mechanism 3. The X-axis linear motor 321, the Y-axis linear motor 331 and the X-axis linear slide 322, the Y-axis linear slide 332 of the XY axis mechanism 3 can realize the high-speed and high-precision reciprocating linear motion of the tray 31 in the X-axis and Y-axis directions. At the same time, the collimator body 51 and the tray 31 are leveled with the upper plane of the tray 31 as the reference. The servo motor 23 of the upper Z axis mechanism 2 drives the linear module 24, drives the cross roller slide 25 and the top screw leveling and fixing assembly 26 to realize high-speed and high-precision reciprocating linear motion in the Z axis direction, and then drives the light source line and the sub-engraving plate connected to the top screw leveling and fixing assembly 26 to move along the Z axis direction. At the same time, the top screw leveling and fixing assembly 26 is leveled with the collimator body 51 as the reference. The lower Z-axis mechanism 4 drives the lower light source identification module (i.e., detection component) composed of the optical objective lens group 9 and CCD10 through the lower Z-axis linear motor 42 and the motor sliding plate 43 to realize high-speed and high-precision reciprocating linear motion in the Z-axis direction. At the same time, the receiving light source surface of the optical objective lens group 9 is leveled based on the top screw leveling fixing component 26 of the upper Z-axis mechanism 2. Among them, the optical objective lens group 9 and CCD10 are coaxially installed; the light source emitting surface on the upper Z-axis mechanism 2, the surface of the tray 31, and the receiving light source surface of the optical objective lens group 9 on the lower Z-axis mechanism 4 are relatively parallel, and then the XY axis direction distance between the XY axis mechanism 3 and the upper Z-axis mechanism 2 is adjusted to achieve the consistency of the three axes, and the performance of the lens is tested through the optical path detection principle of the fingerprint lens under the screen and the imaging analysis of CCD10.

[0062] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An under-screen fingerprint camera detection device, characterized in that: The invention comprises an outer frame (1), an upper Z-axis mechanism (2), an XY-axis mechanism (3), a lower Z-axis mechanism (4) and a collimator mechanism (5), wherein the upper Z-axis mechanism (2), the XY-axis mechanism (3), the lower Z-axis mechanism (4) and the collimator mechanism (5) are all fixed on a main substrate (13) inside the outer frame (1); the upper Z-axis mechanism (2) is connected to a light source generator (6) through a light source line, and the light source line is driven to move along the Z-axis direction through the upper Z-axis mechanism (2), and the upper Z-axis mechanism (2) is also used to adjust the distance moved by the light source line along the X-axis and Y-axis directions; the lower Z-axis mechanism (4) is provided with a detection component for detecting an under-screen fingerprint lens, and the lower Z-axis mechanism (4) driving the detection component to move along the Z-axis direction; placing the under-screen fingerprint lens to be detected on the XY-axis mechanism (3), the XY-axis mechanism (3) being arranged between the upper Z-axis mechanism (2) and the lower Z-axis mechanism (4), driving the under-screen fingerprint lens to move along the X-axis and Y-axis directions through the XY-axis mechanism (3), so that the axis of the light source emitting surface of the light source line, the axis of the light source receiving surface of the detection component, and the axis of the under-screen fingerprint lens coincide with each other; the collimator mechanism (5) is used to calibrate the horizontality of the upper Z-axis mechanism (2), the lower Z-axis mechanism (4), and the XY-axis mechanism (3), so that the light source emitting surface of the light source line, the light source receiving surface of the detection component, and the surface of the under-screen fingerprint lens are parallel; The upper Z-axis mechanism (2) comprises an upper Z-axis main support frame (21), a light source line support frame (22), a servo motor (23), a linear module (24), a cross roller type slide table (25) and a top screw leveling fixing assembly (26); the upper Z-axis main support frame (21) is fixed on the main base plate (13); a servo motor (23) and a linear module (24) connected to the servo motor (23) are arranged on one side of the upper Z-axis main support frame (21); the upper part of the linear module (24) is connected to the light source line support frame (22) for fixing the light source line; the moving parts of the linear module (24) are connected to the cross roller type slide table (25) and the top screw leveling fixing assembly (26); The cross roller slide (25) is connected to the top screw leveling fixing assembly (26), one side of the cross roller slide (25) is connected to the top screw leveling fixing assembly (26), the upper part of the top screw leveling fixing assembly (26) is connected to the light source line, and the lower part of the top screw leveling fixing assembly (26) is connected to the sub-engraved plate; the servo motor (23) drives the linear module (24) to move along the Z axis direction, thereby driving the cross roller slide (25), the top screw leveling fixing assembly (26) and the light source line to move along the Z axis direction; the cross roller slide (25) is used to adjust the distance that the top screw leveling fixing assembly (26) moves along the X axis and Y axis directions; The XY axis mechanism (3) comprises a tray (31), an X axis moving assembly (32), a Y axis moving assembly (33) and a limit assembly (34); the tray (31) is provided with a lens hole (311) for placing an under-screen fingerprint lens; the tray (31) is fixed above the X axis moving assembly (32), and the tray (31) is driven to move along the X axis by the X axis moving assembly (32); the X axis moving assembly (32) is fixed above the Y axis moving assembly (33), and the X axis moving assembly (32) and the tray (31) are driven to move along the Y axis by the Y axis moving assembly (33); and the X axis moving assembly (32) and the Y axis moving assembly (33) are both provided with a limit assembly (34) for limiting the moving distance of the X axis moving assembly (32) and the Y axis moving assembly (33).

2. The under-screen fingerprint camera detection device according to claim 1, characterized in that: The top screw leveling fixing assembly (26) comprises a fixing seat (261), a light source wire sleeve (262) and a leveling disk (263); a side wall (2611) of the fixing seat (261) is fixed to the cross roller type slide (25); a bottom wall (2612) of the fixing seat (261) is connected to the leveling disk (263); and the horizontality of the leveling disk (263) is adjusted by a leveling screw (264); the light source wire sleeve (262) is embedded in a middle through hole of the leveling disk (263); and the light source wire is inserted into the light source wire sleeve (262) and fixed to the light source wire sleeve (262).

3. The under-screen fingerprint camera detection device according to claim 2, characterized in that: The upper part of the leveling disk (263) is a disk structure (2631), and the lower part of the leveling disk (263) is a cylindrical structure (2632); a groove (2633) is provided on the lower end surface of the cylindrical structure (2632) for mounting a sub-engraving plate; a plurality of screw holes (2634) are provided on the disk structure (2631); the leveling screws (264) pass through the screw holes (2634) on the disk structure (2631) and abut against the bottom wall (2612) of the fixing seat (261); the horizontality of the bottom surface of the leveling disk (263) is adjusted by screwing the leveling screws (264); and the locking screws pass through the screw holes (2634) on the disk structure (2631) and are locked and fixed with the bottom wall (2612) of the fixing seat (261).

4. The under-screen fingerprint camera detection device according to claim 3, characterized in that: A V-shaped groove (2613) matching the leveling screw (264) is provided on the bottom wall (2612) of the fixing seat (261), and the bottom end of the leveling screw (264) abuts against the V-shaped groove (2613) to prevent the leveling disk (263) from rotating.

5. The under-screen fingerprint camera detection device according to claim 1, characterized in that: The X-axis moving assembly (32) comprises an X-axis linear motor (321), an X-axis linear slide (322), and an upper frame (323); the X-axis linear motor (321) is fixed on a middle frame (333) of the Y-axis moving assembly (33); a first moving shaft (3211) of the X-axis linear motor (321) is fixed to the upper frame (323); the upper frame (323) is slidably arranged on the upper part of the X-axis linear slide (322); the X-axis linear slide (322) is fixed on the middle frame (333); and the upper frame (323) is driven by the X-axis linear motor (321) to reciprocate along the X-axis linear slide (322).

6. The under-screen fingerprint camera detection device according to claim 1, characterized in that: The Y-axis moving assembly (33) comprises a Y-axis linear motor (331), a Y-axis linear slide (332), and a middle frame (333); the Y-axis linear motor (331) is fixed on the lower frame (334); the second moving axis (3311) of the Y-axis linear motor (331) is fixed to the middle frame (333); the middle frame (333) is slidably arranged on the upper part of the Y-axis linear slide (332); the Y-axis linear slide (332) is fixed on the lower frame (334); and the Y-axis linear motor (331) drives the middle frame (333) to reciprocate along the Y-axis linear slide (332).

7. The under-screen fingerprint camera detection device according to claim 1, characterized in that: The limit assembly (34) comprises a sensing sheet (341) and a sensing switch (342). The sensing sheet (341) is respectively arranged on an upper frame (323) of the X-axis moving assembly (32) and a middle frame (333) of the Y-axis moving assembly (33). The sensing switch (342) is respectively arranged on the middle frame (333) and a lower frame (334). When the sensing sheet (341) slides to the sensing switch (342), it moves in the opposite direction.

8. The under-screen fingerprint camera detection device according to claim 1, characterized in that: The lower Z-axis mechanism (4) comprises a lower Z-axis fixing frame (41), a lower Z-axis linear motor (42), a motor sliding plate (43), a fixing frame (44) and an adjusting frame (45); the upper part of the lower Z-axis fixing frame (41) is fixed to the main base plate (13); one side of the lower Z-axis fixing frame (41) is fixed to the lower Z-axis linear motor (42); the lower Z-axis linear motor (42) is connected to the motor sliding plate (43); the motor sliding plate (43) is driven to slide along the Z-axis direction by the lower Z-axis linear motor (42); the motor sliding plate (43) is connected to the fixing frame (44); an adjusting frame (45) is arranged above the fixing frame (44); a detection component is fixed on the adjusting frame (45); and the horizontality of the detection component is adjusted by a leveling screw.

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