Flip type camera module test fixture and application thereof

Abstract

The invention discloses a flip type camera module test fixture and application thereof, belongs to the field of camera module test, and aims to solve the problems that a camera module is inconvenient to install, the fixing effect is poor, the closing precision of the test fixture is low and the effect is poor in the existing test fixture, and a closed chamber needs to be built in the existing LED lamp test method. A light reflecting device or an illumination meter is needed, the test is complex, and the cost is high. According to the flip type camera module testing jig, an upper cover and a lower cover are connected through a pivoting assembly and buckled through a buckling assembly, the upper cover is provided with a sensor installation groove and a camera testing hole, a connector pressing block and a first installation base are arranged in a right-facing mode, a detection pressing block and a first detection base are arranged in a right-facing mode, and a floating pressing block and a second installation base are arranged in a right-facing mode. When the test fixture is used, the camera module is convenient to install, the fixing effect is good, the test fixture is high in closing precision and good in effect, and the LED lamp test method is simple and efficient in test and low in cost.

Description

Technical Field

[0001] The present invention relates to the field of camera module testing, and in particular to a flip-type camera module testing fixture and application thereof. Background Art

[0002] During the production process of camera modules, the camera modules need to be tested to ensure that they function properly. As devices such as mobile phones and tablets become more and more popular, more and more camera modules are designed with LED lights to provide fill light when the shooting environment is dark. The tests of this type of camera modules include camera tests and LED light tests.

[0003] The existing testing methods for LED lights in camera modules mainly include: 1. The human eye determines the test results based on whether the LED lights in the camera module are emitting light normally. This method will cause eye fatigue and even damage to the human eye, and its test efficiency is low. 2. Build a closed black light box to create an environment without external light interference, and use a light meter for testing. The light meter is a test instrument that can quantify the brightness of light. This method is more complicated to test and has a high test cost.

[0004] Chinese patent announcement number CN208924389U, announcement date May 31, 2019, the patent name is a test system for a camera module with an LED. The application discloses a test system for a camera module with an LED. The camera module includes a camera, a photosensitive chip located at the bottom of the camera, and an LED; the test system includes a test fixture, which is electrically connected to the camera module; the test system also includes a closed chamber that provides an enclosed space for both the camera and the LED; the closed chamber also has a reflective device corresponding to the positions of the camera and the LED.

[0005] The test system for a camera module with LED disclosed in the above patent document utilizes the camera and photosensitive chip carried by the camera module itself, and sets a reflective device in a closed room so that the reflective device reflects the light emitted by the LED to the camera. The photosensitive chip at the bottom of the camera converts the light signal received by the camera into an electrical signal. Finally, the test jig can judge whether the LED function of the camera module is normal based on the data of the electrical signal. The test system for a camera module with LED disclosed in the patent document solves the problem that the use of human eyes for testing in the existing test method of LED lights in camera modules will cause eye fatigue and even damage to the human eyes, and its test efficiency is low. At the same time, it solves the problem of needing a light meter to test the LED lights in the camera module, but it still needs to build a closed room and a reflective device.

[0006] Chinese patent announcement number CN206363073U, announcement date July 28, 2017, patent name is LED light brightness test fixture for camera module, the application discloses a LED light brightness test fixture for camera module, including a lower cover and an upper cover, the lower cover and the upper cover enclose a closed, light-proof chamber, the camera module is arranged in the chamber and fixed in a groove on the inner surface of the lower cover, and a through hole that can cooperate with the brightness sensor head of the light meter is provided on the upper cover opposite to the position of the LED light in the camera module.

[0007] The LED light brightness test fixture for a camera module disclosed in the above patent document directly places the camera module in a light-tight chamber surrounded by an upper cover and a lower cover. During the test, the coordination between the brightness sensor head of the light meter and the through hole will also prevent external light from entering the chamber through the through hole and affecting the test results. It can provide a completely blacked-out environment for the brightness test of the LED light and improve the test accuracy. The LED light brightness test fixture for a camera module disclosed in the patent document solves the problem that the use of human eyes for testing in the existing camera module LED light testing method will cause eye fatigue and even damage to the human eye, and its test efficiency is low. It also solves the problem of needing to build a closed black light box, but it still needs to use a light meter for testing. In addition, it also has the problems of inconvenient camera module installation, poor fixing effect, low closing accuracy of the test fixture, and poor closing effect. Summary of the invention

[0008] In view of the problems mentioned in the background technology that the camera module test fixture of the prior art is inconvenient to install, has poor fixing effect, low closing accuracy of the test fixture, and poor closing effect when the camera module is used, and the problem that the camera module LED light testing method of the prior art needs to build a closed room, needs a reflective device, needs a light meter, and the testing is relatively complicated and the testing cost is high, the present invention provides a flip-top camera module test fixture and an application thereof. When the camera module test fixture is used, the camera module is convenient to install, has good fixing effect, and the closing accuracy of the test fixture is high, and the closing effect is good. The camera module LED light testing method is simple and efficient, and the testing cost is low.

[0009] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a flip-type camera module test fixture, comprising: an upper cover and a lower cover are connected by a pivot assembly and buckled by a snap-fit ​​assembly; the upper cover is provided with a sensor mounting groove and a camera test hole; the connector pressure block and the first mounting seat are arranged opposite to each other, the detection pressure block and the first detection seat are arranged opposite to each other, and the floating pressure block and the second mounting seat are arranged opposite to each other.

[0010] Two photosensitive sensors are arranged in the sensor installation groove, including a first photosensitive sensor and a second photosensitive sensor. When the camera module test fixture of the present invention is used, the camera module is easy to install and has a good fixing effect. The test fixture has high closing precision and a good closing effect.

[0011] Preferably, the inner side surface of the first mounting groove provided in the first mounting seat comprises a first guiding inclined surface and a first guiding vertical surface, and a plurality of first semicircular grooves are provided around the first mounting groove.

[0012] The design of the first guide inclined surface and the first guide vertical surface makes the installation of the camera module very convenient. The design of the first semicircular grooves can avoid the camera module from controlling the corners of the circuit board, and at the same time facilitates the disassembly and installation of the camera module in the test fixture.

[0013] Preferably, a conductive column slot is provided in the first installation slot, and a plurality of conductive columns are provided in the conductive column slot.

[0014] This design makes the power supply of the camera module very simple and convenient. Direct contact between a number of conductive posts and the camera module control circuit board is sufficient to provide power for it.

[0015] Preferably, the first detection seat is provided with a spring pin mounting hole, the first spring pin and the second spring pin are mounted in the spring pin mounting hole, and the detection pressing block is made of a conductive material.

[0016] When the test fixture is in a closed state, the detection pressing block is pressed down, the first spring pin and the second spring pin abut against the detection pressing block, and the detection pressing block made of conductive material makes the first spring pin and the second spring pin conductive. This design gives the test fixture the function of closed detection.

[0017] Preferably, the second mounting seat includes a plurality of supporting parts, the inner side surface of the second mounting groove opened in the second mounting seat includes a second guiding inclined surface and a second guiding vertical surface, a plurality of second semicircular grooves are arranged around the second mounting groove, and a heat dissipation block is arranged under the second mounting seat.

[0018] The design of the second guide inclined surface, the second guide vertical surface and the supporting part makes the installation of the camera module very convenient. The design of the second semicircular groove can avoid the camera module controlling the corners of the circuit board, and at the same time facilitates the disassembly and installation of the camera module in the test fixture.

[0019] Preferably, a plurality of ejector pins are arranged in the ejector pin grooves provided in the lower cover, and the ejector pins cooperate with the ejector pin through holes provided in the upper cover.

[0020] When the test fixture is in a closed state, a plurality of ejector pins arranged on the lower cover enter the ejector pin through holes opened in the upper cover, thereby conducting the photosensitive sensor arranged in the sensor installation groove of the upper cover.

[0021] Preferably, a snap-fitting portion is provided at the connection between the horizontal block and the vertical block of the snap-fitting assembly, a hooking portion is provided at the end of the vertical block, a hooking groove provided at the connection between the vertical block and the hooking portion cooperates with a second snap-fitting rod, and the snap-fitting assembly also includes a snap-fitting block through hole and a first snap-fitting rod installed therein.

[0022] After the upper cover and the lower cover of the test fixture are closed, they can be conveniently buckled together through the buckle assembly, and the closing accuracy is high and the closing effect is good.

[0023] The present invention also provides an application of a flip-type camera module test fixture, based on the above-mentioned flip-type camera module test fixture, comprising: after loading the camera module, fastening the upper cover and the lower cover of the test fixture by a fastening component; respectively obtaining test data from two photosensitive sensors in the sensor installation slot of the test fixture, including a first test value and a second test value; recording n groups of test data of n camera modules and calculating their average value as a standard; obtaining the test data of the target camera module and measuring the difference between it and the standard.

[0024] The camera module LED light testing method of the present invention makes judgments based on the test data of two photosensors in a test fixture, and the test is simple, efficient and low in cost.

[0025] Preferably, before recording n groups of test data of n camera modules, it is necessary to determine whether each group of test data is abnormal. If the absolute value of the difference between the first test value and the second test value exceeds a first threshold, it is abnormal; otherwise, it is normal.

[0026] If a set of test data is abnormal, the test is performed again after the abnormality is processed. If a set of test data is normal, the test data of the current camera module LED light is recorded.

[0027] Preferably, the average value includes a first average value and a second average value, and the test data of the target camera module includes a first target value and a second target value. The difference is measured by calculating the arithmetic square root of the sum of the squares of the deviation of the first target value relative to the first average value and the deviation of the second target value relative to the second average value. If the difference exceeds a second threshold, the test fails; otherwise, the test passes.

[0028] The measurement of the above difference is calculated by the test software. By calculating the above difference, it is directly determined whether the LED light of the camera module has passed the test, making the subsequent LED light test of the target camera module to be tested convenient and efficient.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The design of multiple guiding inclined surfaces and multiple guiding vertical surfaces makes the installation of the camera module very convenient;

[0031] (2) The design of multiple semicircular grooves can facilitate the removal and installation of the camera module in the test fixture;

[0032] (3) The design of the pressure block ensures good fixation of the camera module and stable electrical connection when the test fixture is used;

[0033] (4) The design of direct contact between the conductive column and the control circuit board and the ejector pin matching the ejector pin through hole makes the power supply and conduction of the camera module and the photosensitive sensor very simple and convenient;

[0034] (5) Based on detecting whether the pressure block conducts the first spring pin and the second spring pin, it is possible to detect whether the test fixture is closed properly, thus giving the test fixture a closure detection function;

[0035] (6) After the upper and lower covers of the test fixture are closed, they can be conveniently fastened together through the snap-fit ​​assembly, and the closing accuracy is high and the closing effect is good. There is no need to build a closed room and reflective device separately, and the camera and LED light tests can be carried out simultaneously;

[0036] (7) The camera module LED light test method is based on the test data of the two photosensors in the test fixture. The test is simple, efficient and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a stereoscopic diagram of a flip-top camera module test fixture of the present invention.

[0038] Figure 2 The present invention Figure 1 Partial schematic diagram of the middle upper cover.

[0039] Figure 3 The present invention Figure 1 A perspective view of the connector mounting assembly.

[0040] Figure 4 The present invention Figure 1 A three-dimensional diagram of the detection module.

[0041] Figure 5 The present invention Figure 1 A cross-sectional view of the detection module.

[0042] Figure 6 The present invention Figure 1 A three-dimensional view of the middle module installation assembly.

[0043] Figure 7 The present invention Figure 1 A partial schematic diagram of the midsole plate.

[0044] Figure 8 The present invention Figure 1 A cross-sectional view of the middle snap-fit ​​assembly and the second snap-fit ​​portion.

[0045] Fig. 9 It is a schematic diagram of a flip-type camera module test fixture of the present invention after a camera module is installed.

[0046] Fig.10 The present invention is a flowchart of the application of a flip-type camera module test fixture.

[0047] In the figure:

[0048] 1. Upper cover, 11. Pivoting part, 111. First pivoting ear, 112. Second pivoting ear, 113. Pivoting hole, 12. First buckling part, 121. First buckling groove, 122. Buckle protrusion, 123. First buckling rod mounting hole, 13. Sensor mounting part, 131. Optoelectronic integrated board, 132. First photosensor, 133. Second photosensor, 134. Ejector through hole, 135. Integrated board mounting hole, 136. Sensor mounting groove, 14. First embedded part, 141. Connector block mounting hole, 142. Connector block mounting groove, 143. Connector mounting seat embedded groove, 15. Second embedded part, 151. Detection block mounting hole, 152. Detection block mounting groove, 16. Third embedded part, 161. Floating block mounting hole, 162. Floating block mounting groove, 163. Camera test hole, 164. Boss, 17. Connector block, 171. Mounting part, 172. Clamping part, 18. Detection block, 19. Floating block, 191. Test clamping hole

[0049] 2. Lower cover, 21. Second buckling part, 211. Make way inclined plane, 212. Buckling rod through slot, 213. Second buckling slot, 214. Second buckling rod mounting hole, 22. Lower cover fixing hole, 23. Lower cover positioning hole, 24. Ejector lead-out part, 241. Ejector slot, 242. Ejector, 25. LED lamp slot, 26. Connector mounting assembly, 261. First mounting seat, 2611. First guide inclined plane, 2612. First guide vertical plane, 2613. First semicircular slot, 2614. First mounting slot, 2615. Conductive column slot, 2616. Conductive column, 2617. Mounting step, 2618. Mounting seat bottom block, 262. Support block, 2621. Support block mounting hole, 2622. A supporting foot, 2623. A second supporting foot, 263. A guide block, 27. A detection module, 271. A first detection seat, 2711. A mounting hole of the first detection seat, 2712. An upper mounting hole of a spring pin, 272. A second detection seat, 2721. A mounting hole of the second detection seat, 2722. A lower mounting hole of a spring pin, 273. A spring pin, 2731. A first spring pin, 2732. A second spring pin, 28. A module mounting assembly, 281. A second mounting seat, 2811. A second guide inclined surface, 2812. A second guide vertical surface, 2813. A second mounting groove, 2814. A second semicircular groove, 2815. A supporting portion, 2816. A connecting groove, 2817. A mounting hole of a second mounting seat, 282. A heat sink

[0050] 3. Pivot assembly, 31. Fixed seat, 311. First fixed seat, 3111. First fixing hole, 312. Second fixed seat, 3121. Second fixing hole, 313. Pivot shaft, 4. Snap assembly, 41. Horizontal block, 42. Vertical block, 43. Snap part, 44. Hook part, 45. Hook slot, 46. First snap rod, 47. Second snap rod, 48. Snap block through hole, 5. Bottom plate, 51. Bottom plate fixing hole, 52. Power supply slot, 53. Contact point, 531. First contact point, 532. Second contact point, 6. Camera module, 61. Control circuit board, 62. Camera, 63. LED light DETAILED DESCRIPTION

[0051] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0052] Example:

[0053] like Figures 1 to 9A flip-type camera module test fixture shown includes an upper cover 1 and a lower cover 2, and the upper cover 1 and the lower cover 2 are rotatably connected through a pivot assembly 3. The fixing seat 31 of the pivot assembly 3 is arranged on the lower cover 2, and the fixing seat 31 includes a first fixing seat 311 and a second fixing seat 312. The first fixing seat 311 is provided with a first fixing hole 3111, and the second fixing seat 312 is provided with a second fixing hole 3121. One end of the pivot shaft 313 passes through the first fixing hole 3111 provided on the first fixing seat 311 and is fixed on the outside of the first fixing seat 311, and the other end of the pivot shaft 313 passes through the second fixing hole 3121 provided on the second fixing seat 312 and is fixed on the outside of the second fixing seat 312.

[0054] The upper cover 1 includes a pivoting portion 11, and the pivoting portion 11 is provided with a first pivoting ear 111 and a second pivoting ear 112. The first pivoting ear 111 and the second pivoting ear 112 are both provided with a pivoting hole 113, and the inner diameter of the pivoting hole 113 is equal to the outer diameter of the pivot shaft 313. The pivot shaft 313 passes through the pivoting holes 113 provided on the first pivoting ear 111 and the second pivoting ear 112. The outer side surface of the first pivoting ear 111 fits with the inner side surface of the first fixing seat 311, and the outer side surface of the second pivoting ear 112 fits with the inner side surface of the second fixing seat 312. The above design makes the closing accuracy of the test fixture described in this embodiment high.

[0055] The upper cover 1 also includes a first embedded portion 14, a connector pressing block mounting groove 142 is provided at the bottom of the first embedded portion 14, a connector mounting seat embedding groove 143 is provided on the outer side of the connector pressing block mounting groove 142, and a connector pressing block mounting hole 141 is provided on the bottom surface of the first embedded portion 14 for mounting the connector pressing block 17. The connector pressing block 17 includes an upper mounting portion 171 and a lower clamping portion 172, the upper mounting portion 171 of the connector pressing block 17 is also provided with a connector pressing block mounting hole 141 for mounting with the connector pressing block mounting groove 142, and the clamping portion 172 of the lower portion of the connector pressing block 17 is used to clamp the control circuit board 61 of the camera module 6 thereunder, so that the control circuit board 61 and the conductive column 2616 thereunder are in stable contact, thereby forming a stable electrical connection.

[0056] The upper cover 1 further includes a second embedded portion 15, which includes a detection pressure block mounting groove 152 and a detection pressure block mounting hole 151 provided on the bottom surface thereof for mounting a detection pressure block 18. The detection pressure block 18 is made of a conductive material, and the detection pressure block 18 is also provided with a detection pressure block mounting hole 151 for mounting with the detection pressure block mounting groove 152.

[0057] The upper cover 1 also includes a third embedded portion 16, the bottom of which is provided with a floating pressure block installation groove 162 in the shape of a rounded rectangle, the bottom surface of which is provided with a circular camera test hole 163, the outer surface of which is provided with a floating pressure block installation hole 161 for installing a floating pressure block 19, and a boss 164 is provided between two adjacent floating pressure block installation holes 161. The outer contour of the floating pressure block 19 is a rounded rectangle, and a test clamping hole 191 in the shape of a regular octagon is provided in the middle of the floating pressure block 19, and the test clamping hole 191 enables the floating pressure block 19 to clamp the camera module 6 installed thereunder when the test fixture is closed, while not affecting the synchronous testing of the camera 62. The floating pressure block 19 is also provided with a floating pressure block installation hole 161 for installation with the floating pressure block installation groove 162. The design of the above pressure block enables the camera module 6 to be fixed and the electrical connection to be stable when the test fixture is used.

[0058] The upper cover 1 also includes a sensor mounting portion 13. A sensor mounting groove 136 is provided at a position of the upper cover 1 corresponding to the LED light groove 25 of the lower cover 2. The first photosensor 132 and the second photosensor 133 provided on the optoelectronic integrated board 131 are installed in the sensor mounting groove 136 of the upper cover 1. The first photosensor 132 and the second photosensor 133 use different I2C addresses to avoid address conflicts. The optoelectronic integrated board 131 is installed on the outer surface of the upper cover 1 through a plurality of integrated board mounting holes 135. In this embodiment, the number of the integrated board mounting holes 135 is four. A plurality of ejector pin through holes 134 are provided in the center of the rectangle formed by the four integrated board mounting holes 135. In this embodiment, the number of the ejector pin through holes 134 is four.

[0059] The upper cover 1 also includes a first buckling portion 12, and a first buckling groove 121 provided in the first buckling portion 12 is used to make way for the buckling assembly 4 when the test fixture is buckled. The first buckling portion 12 is provided with a first buckling rod mounting hole 123 that passes through the upper cover 1 for mounting the first buckling rod 46. The first buckling rod 46 passes through the first buckling rod mounting hole 123 and the first buckling groove 121 to be installed in the upper cover 1. The first buckling portion 12 is also provided with a buckle protrusion 122 to facilitate the buckling of the upper cover 1.

[0060] The lower cover 2 is provided with a connector mounting assembly 26, which is composed of a first mounting seat 261, a support block 262 and a guide block 263. The stereoscopic diagram of the connector mounting assembly 26 is shown in FIG. Figure 3As shown. The first mounting seat 261 and the connector pressing block 17 are arranged opposite to each other. A first mounting groove 2614 is provided in the first mounting seat 261 for installing the connector part in the camera module 6 control circuit board 61. The inner side surface of the first mounting groove 2614 is provided with a plurality of first guiding inclined surfaces 2611 and a plurality of first guiding vertical surfaces 2612. The design of the first guiding inclined surfaces 2611 and the first guiding vertical surfaces 2612 facilitates the installation of the camera module 6 to a great extent. A plurality of first semicircular grooves 2613 are arranged around the first mounting groove 2614. The design of the plurality of first semicircular grooves 2613 can avoid the corners of the camera module 6 control circuit board 61, and at the same time facilitate the disassembly and installation of the camera module 6 in the test fixture. A conductive column slot 2615 is provided in the first installation slot 2614, and installation steps 2617 are provided on both sides of the conductive column slot 2615. A plurality of conductive columns 2616 are provided in the conductive column slot 2615, and a plurality of power supply slots 52 of the same number are correspondingly provided on the bottom plate 5 for installing the plurality of conductive columns 2616. This design makes the power supply of the camera module 6 very simple and convenient, and the plurality of conductive columns 2616 can be powered by direct contact with the control circuit board 61 of the camera module 6. A mounting seat bottom block 2618 is provided at the bottom of the first mounting seat 261, and the mounting seat bottom block 2618 is fitted with the upper surface of the support block 262 arranged below the first mounting seat 261. A first supporting foot 2622 and a second supporting foot 2623 are provided at the bottom of the support block 262. A plurality of support block mounting holes 2621 are also provided in the support block 262 for the installation of the support block 262. In this embodiment, the number of the support block mounting holes 2621 is four, and a guide block 263 is provided at the bottom center of the support block 262, i.e., between the first supporting foot 2622 and the second supporting foot 2623.

[0061] The lower cover 2 is also provided with a detection module 27, which includes a first detection seat 271, a second detection seat 272 and a spring pin 273, wherein the spring pin 273 includes a first spring pin 2731 and a second spring pin 2732. The three-dimensional view and the cross-sectional view of the detection module 27 are respectively as shown in FIG. Figure 4 He Ru Figure 5As shown. The first detection seat 271 and the detection pressing block 18 are arranged opposite to each other. A plurality of first detection seat mounting holes 2711 are provided in the first detection seat 271. In this embodiment, the number of the first detection seat mounting holes 2711 is four. Two spring pin upper mounting holes 2712 are also provided in the first detection seat 271. The upper parts of the first spring pin 2731 and the second spring pin 2732 are respectively installed in the two spring pin upper mounting holes 2712. The needle tips of the upper parts of the first spring pin 2731 and the second spring pin 2732 are both higher than the upper surface of the first detection seat 271. A plurality of second detection seat mounting holes 2721 are provided in the second detection seat 272. In this embodiment, the number of the second detection seat mounting holes 2721 is two. Two spring pin lower mounting holes 2722 are also provided in the second detection seat 272. The lower parts of the first spring pin 2731 and the second spring pin 2732 are respectively installed in the two spring pin lower mounting holes 2722. The first detection seat 271 and the second detection seat 272 are installed in a close fit so that the two first detection seat mounting holes 2711 located in the middle part of the first detection seat 271 and the two second detection seat mounting holes 2721 of the second detection seat 272 are aligned, and at the same time, the two spring pin upper mounting holes 2712 of the first detection seat 271 and the two spring pin lower mounting holes 2722 of the second detection seat 272 are aligned.

[0062] The detection module 27 disposed in the lower cover 2 is combined with the detection pressing block 18 installed in the upper cover 1, giving the test fixture described in this embodiment the function of closing detection. When the lower cover 2 and the upper cover 1 of the test fixture are in an unclosed state, the first spring pin 2731 and the second spring pin 2732 are both in a natural uncompressed state, and the section of the line between the first spring pin 2731 and the second spring pin 2732 is disconnected, and the machine under the bottom plate 5 sends out an alarm to inform the tester that the test fixture is not closed properly. When the lower cover 2 and the upper cover 1 of the test fixture are in a closed state, the detection pressure block 18 installed in the upper cover 1 is pressed down, and the first spring needle 2731 and the second spring needle 2732 are pressed down by force and are in a compressed state, and the needle tips of the upper parts of the first spring needle 2731 and the second spring needle 2732 abut against the detection pressure block 18, and the needle tips of the lower parts of the first spring needle 2731 and the second spring needle 2732 contact with two contact points 53 correspondingly arranged on the bottom plate 5, namely the first contact point 531 and the second contact point 532. Since the detection pressure block 18 is made of conductive material, in this embodiment, the detection pressure block 18 is made of metal, so that the first spring needle 2731 and the second spring needle 2732 are turned on, that is, the section of the line between the first spring needle 2731 and the second spring needle 2732 is short-circuited, and the machine under the bottom plate 5 will recognize this signal and will not issue an alarm, informing the tester that the test fixture is closed and qualified.

[0063] The lower cover 2 is also provided with a module mounting assembly 28, which is composed of a second mounting seat 281 and a heat sink 282 disposed thereunder. The three-dimensional diagram of the module mounting assembly 28 is shown in FIG. Figure 6 As shown. The second mounting seat 281 and the floating pressure block 19 are arranged opposite to each other. The second mounting seat 281 is provided with a plurality of supporting parts 2815. A second mounting groove 2813 is provided in the second mounting seat 281 for mounting the non-connector part of the camera module 6 control circuit board 61. The inner side surface of the second mounting groove 2813 is provided with a plurality of second guiding inclined surfaces 2811 and a plurality of second guiding vertical surfaces 2812. The design of the second guiding inclined surfaces 2811 and the second guiding vertical surfaces 2812 facilitates the installation of the camera module 6 to a great extent. A plurality of second semicircular grooves 2814 are arranged around the second mounting groove 2813. The design of the plurality of second semicircular grooves 2814 can avoid the corners of the camera module 6 control circuit board 61, and facilitate the disassembly and installation of the camera module 6 in the test fixture. A connecting groove 2816 is provided on one side of the second mounting seat 281. A plurality of second mounting seat mounting holes 2817 are also provided in the second mounting seat 281. In this embodiment, the number of the second mounting seat mounting holes 2817 is five.

[0064] An LED lamp slot 25 is also provided in the lower cover 2 for installing the LED lamp 63 of the camera module 6. The LED lamp slot 25 in the lower cover 2 is arranged opposite to the sensor mounting slot 136 in the upper cover 1, and the upper cover 1 and the lower cover 2 are designed to be matte black to avoid interference from reflections and other factors that affect the test results. The above design enables the test fixture to form a closed light-shielding environment inside for testing the LED lamp 63 of the camera module 6 when it is closed. An ejector lead-out portion 24 is provided near the LED lamp slot 25, including an ejector slot 241 and a plurality of ejector pins 242 provided in the ejector slot 241. In this embodiment, the number of ejector pins 242 is four, and the ejector pins 242 cooperate with the ejector through-hole 134 in the upper cover 1. When the test fixture is in a closed state, the plurality of ejector pins 242 provided in the lower cover 2 enter the ejector through-hole 134 provided in the upper cover 1, thereby conducting the light-sensitive sensor provided in the sensor mounting slot 136 of the upper cover 1. The design of direct contact between the conductive pillar 2616 and the control circuit board 61 and the ejector pin 242 and the ejector pin through hole 134 makes the power supply and conduction of the camera module 6 and the light sensor very simple and convenient. The lower cover 2 is also provided with a plurality of lower cover positioning holes 23 and a plurality of lower cover fixing holes 22 for positioning and fixing the lower cover 2 and the bottom plate 5.

[0065] The lower cover 2 is also provided with a second buckling portion 21, and the second buckling groove 213 provided in the second buckling portion 21 is used to make way for the buckling assembly 4 when the test fixture is buckled. The second buckling portion 21 is provided with a second buckling rod mounting hole 214 that passes through the lower cover 2 for mounting the second buckling rod 47. The second buckling rod 47 passes through the second buckling rod mounting hole 214 and the second buckling groove 213 and just fits into the buckling rod passing groove 212 provided on the upper surface of the second buckling groove 213 of the lower cover 2, so as to be installed in the lower cover 2. The second buckling portion 21 is also provided with a yielding inclined surface 211, which allows the buckle protrusion 122 in the upper cover 1 to be slightly deformed when the test fixture is buckled.

[0066] The first snap-fitting portion 12 of the upper cover 1 and the second snap-fitting portion 21 of the lower cover 2 are precisely snapped together through the snap-fitting assembly 4. The snap-fitting assembly 4 includes a horizontal block 41 and a vertical block 42 arranged perpendicular thereto, a snap-fitting portion 43 is provided at the connection between the two, a hook portion 44 is provided on the right side of the end of the vertical block 42, and a hook groove 45 is provided at the connection between the vertical block 42 and the hook portion 44, and the hook groove 45 cooperates with the second snap-fitting rod 47. The snap-fitting assembly 4 also includes a snap-fitting block through hole 48, and the snap-fitting block through hole 48 is used to install the first snap-fitting rod 46. After the upper cover 1 and the lower cover 2 of the test fixture are closed, they can be conveniently snapped together through the snap-fitting assembly 4, and the closing precision is high and the closing effect is good. In addition, a plurality of bottom plate fixing holes 51 are provided on the bottom plate 5 for positioning and fixing the bottom plate 5 and the machine below it.

[0067] This embodiment also includes an application of a flip-type camera module test fixture. Based on the above-mentioned flip-type camera module test fixture in this embodiment, its flow chart is as follows: Fig.10 shown.

[0068] First, you need to build a data acquisition module, which includes a camera module test box, a data transmission line, and a computer. The data acquisition module is connected to the test fixture and powered by it. Specifically, the camera module test box is connected to the bottom plate of the test fixture and provides voltage to the test fixture. The camera module test box is connected to the computer via a data transmission line, and the test software is installed on the computer.

[0069] Next, load the camera module into the test fixture, close the upper cover and the lower cover, and precisely fasten the upper cover and the lower cover through the snap-fit ​​assembly. After the upper cover and the lower cover are closed, the camera module including the camera and the LED light are powered on, and several ejector pins in the lower cover enter the ejector pin holes in the upper cover, thereby conducting the first photosensitive sensor 132 and the second photosensitive sensor 133 installed in the sensor mounting groove of the upper cover of the test fixture so that the first photosensitive sensor 132 and the second photosensitive sensor 133 are powered on. The next step is to formally test the camera module. Due to the design and structural characteristics of the test fixture, the camera test and the LED light test can be performed simultaneously without affecting each other. This embodiment focuses on the LED light test for detailed description.

[0070] The test software installed on the computer obtains test data from the registers of the two photosensors, namely the first photosensor 132 and the second photosensor 133 in the sensor installation slot of the test fixture, respectively, through the I2C protocol, including the brightness L1, namely the first test value, and L2, namely the second test value, of the LED light in the current camera module. Among them, I2C, namely Inter-Integrated Circuit, refers to the integrated circuit bus, and the I2C protocol is a serial communication protocol used for communication and data exchange between various electronic devices. Since the first photosensor 132 and the second photosensor 133 use different I2C addresses, the test data stored in the registers of the first photosensor 132 and the second photosensor 133 can be read independently and accurately.

[0071] Determine whether the acquired test data is abnormal. The abnormality detection mechanism here is: if the absolute value of the difference between the first test value and the second test value exceeds the set first threshold, it indicates that there is an abnormality, and it is necessary to analyze the cause of the abnormality and handle the abnormality. For example, if a photosensitive sensor fails, it needs to be replaced with a normal photosensitive sensor. After handling the abnormality, retest the current camera module. If the absolute value of the difference between the first test value and the second test value does not exceed the set first threshold, it indicates that the situation is normal and the test data of the LED light of the current camera module needs to be recorded.

[0072] Replace the camera module and repeat the above test process. A total of n groups of test data of the LED lights in n camera modules need to be recorded, where n is set by the tester and should not be set too small. After recording n groups of test data L1 and L2, calculate the average values ​​of the n groups of test data, i.e. the average value of L1 data and the average value of L2 data, which are L1_avg, i.e. the first average value, and L2_avg, i.e. the second average value. Subsequent tests of the LED lights in the target camera module are all based on the above first average value and second average value as the standard for determining the test results.

[0073] Currently, the target camera module needs to be tested. Here we only care about the test of the LED light in the target camera module, obtain the test data L1_test, i.e. the first target value, and L2_test, i.e. the second target value, of the LED light, and measure the difference between the first target value and the second target value and the above-mentioned standards, i.e. the first average value and the second average value.

[0074] The measurement of the above-mentioned difference uses a comprehensive measurement of relative deviation. Specifically, the deviation of the first target value relative to the first average value, i.e., (first target value - first average value) / first average value, and the deviation of the second target value relative to the second average value, i.e., (second target value - second average value) / second average value, are calculated respectively, and then the arithmetic square root of the sum of the squares of the above-mentioned two deviations is calculated to obtain the final quantified difference. If the final calculated difference exceeds the set second threshold, the test result is failed. If the final calculated difference does not exceed the set second threshold, the test result is passed. The measurement of the above-mentioned difference is calculated by the test software, and the calculation of the above-mentioned difference directly determines whether the camera module LED light has passed the test, so that the subsequent LED light test of the target camera module to be tested is convenient and efficient.

[0075] The application of a flip-type camera module test fixture described in this embodiment makes judgments based on the test data of two photosensors in the test fixture, and the test is simple, efficient and low in cost.

[0076] The embodiments described above are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention should be included in the protection scope of the present invention.

Claims

1. A clamshell camera module test fixture, characterized in that: include: The upper cover (1) and the lower cover (2) are connected via a pivot assembly (3) and are buckled via a buckling assembly (4); The upper cover (1) is provided with a sensor installation slot (136) and a camera test hole (163); The connector pressing block (17) and the first mounting seat (261) are arranged opposite to each other, the detection pressing block (18) and the first detection seat (271) are arranged opposite to each other, and the floating pressing block (19) and the second mounting seat (281) are arranged opposite to each other.

2. A flip-top camera module test fixture according to claim 1, characterized in that: The inner side surface of the first mounting groove (2614) provided in the first mounting seat (261) comprises a first guiding inclined surface (2611) and a first guiding vertical surface (2612), and a plurality of first semicircular grooves (2613) are provided around the first mounting groove (2614).

3. A flip-top camera module test fixture according to claim 2, characterized in that: A conductive column slot (2615) is provided in the first installation slot (2614), and a plurality of conductive columns (2616) are provided in the conductive column slot (2615).

4. A flip-top camera module test fixture according to claim 1, 2 or 3, characterized in that: The first detection seat (271) is provided with a spring pin mounting hole (2712), the first spring pin (2731) and the second spring pin (2732) are mounted in the spring pin mounting hole (2712), and the detection pressing block (18) is made of a conductive material.

5. A flip-top camera module test fixture according to claim 1, 2 or 3, characterized in that: The second mounting seat (281) includes a plurality of supporting portions (2815); the inner side surface of the second mounting groove (2813) provided in the second mounting seat (281) includes a second guiding inclined surface (2811) and a second guiding vertical surface (2812); a plurality of second semicircular grooves (2814) are provided around the second mounting groove (2813); and a heat dissipation block (282) is provided below the second mounting seat (281).

6. The flip-top camera module test fixture according to claim 1, characterized in that: A plurality of ejector pins (242) are arranged in the ejector pin groove (241) provided in the lower cover (2), and the ejector pins (242) cooperate with the ejector pin through holes (134) provided in the upper cover (1).

7. The flip-top camera module test fixture according to claim 1, characterized in that: A buckling portion (43) is provided at the connection between the horizontal block (41) and the vertical block (42) of the buckling assembly (4), a hook portion (44) is provided at the end of the vertical block (42), a hook groove (45) provided at the connection between the vertical block (42) and the hook portion (44) cooperates with a second buckling rod (47), and the buckling assembly (4) further comprises a buckling block through hole (48) and a first buckling rod (46) installed therein.

8. An application of a clamshell camera module test fixture, based on the clamshell camera module test fixture according to any one of claims 1 to 7, characterized in that: include: After loading the camera module, fasten the upper cover and lower cover of the test fixture by fastening the components; Acquire test data from two photosensors in the sensor installation slot of the test fixture, including a first test value and a second test value; Record n ​​groups of test data of n camera modules and calculate their average value as the standard; Obtain test data of the target camera module and measure its difference from the standard.

9. The application of a flip-type camera module test fixture according to claim 8, characterized in that: Before recording n groups of test data of n camera modules, it is necessary to determine whether each group of test data is abnormal. If the absolute value of the difference between the first test value and the second test value exceeds a first threshold, it is abnormal; otherwise, it is normal.

10. The application of a flip-type camera module test fixture according to claim 8 or 9, characterized in that: The average value includes a first average value and a second average value, and the test data of the target camera module includes a first target value and a second target value. The difference is measured by calculating the arithmetic square root of the sum of the squares of the deviation of the first target value relative to the first average value and the deviation of the second target value relative to the second average value. If the difference exceeds a second threshold, the test fails, otherwise, the test passes.

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