LED line detection device

Abstract

The utility model discloses an LED line detection device, which comprises a detection jig, an alignment mechanism, an FPC (Flexible Printed Circuit) flat cable, an adapter plate and an upper computer, the detection tool is provided with a probe, and the other end of the probe is connected with an LED detection lamp. The detection jig is aligned with a welding spot of an LED circuit through the alignment mechanism, the probe is pricked to a corresponding electrode of the LED circuit, a wire outlet area of the LED circuit is matched with the FPC flat cable, the adapter plate is connected with an upper computer to provide a power supply, then the probe is connected with the welding spot of the LED circuit, and the circuit state can be judged according to the LED detection lamp. In addition, other positions of the LED circuit can be detected by moving the position of the detection jig, so that the detection of the whole large LED circuit is completed. According to the utility model, the circuit can be detected in the circuit manufacturing process, so that the control of product quality is completed in the manufacturing stage, and large loss caused by poor functionality of the circuit which can only be found after welding of all LEDs is completed is avoided.

Description

Technical Field

[0001] The utility model relates to the field of display technology, and more specifically, particularly to an LED circuit detection device. Background Art

[0002] With the continuous development of display panel technology, the display industry has higher and higher requirements for high resolution, high brightness, low power consumption, thin thickness and other characteristics. The distance between LED lights is getting smaller and smaller, and the number of lights per unit area continues to increase, so the task of detection is becoming more and more difficult. Since the welding points of LED lights are not connected before welding, it is impossible to directly use software to perform lighting tests or circuit conductivity tests. The traditional detection method can only inspect the circuit through AOI. AOI mainly inspects the appearance through optics, and there is a risk of missing the circuit function. Usually, the lighting test is performed after the LED welding is completed. At this time, if a defect is found, it will be repaired. The repair is time-consuming and labor-intensive, and the reliability may be reduced. Even the entire LED may be scrapped, causing great losses. Utility Model Content

[0003] The utility model provides an LED circuit detection device to solve the problems raised in the above background technology. To achieve the above purpose, the utility model provides the following technical solutions: an LED circuit detection device, including a detection fixture, an alignment mechanism, an FPC cable, an adapter board and a host computer; the detection fixture is provided with a plurality of probes arranged in an array, and the probes are arranged in coordination with the solder joints of the LED circuit; the other end of the probe is connected to an LED detection light; the detection fixture can be detachably mounted on the alignment mechanism, and the alignment mechanism is used to align the probe of the detection fixture with the solder joints of the LED circuit; one end of the FPC cable is press-fitted and connected to the outlet area of ​​the LED circuit, and the other end is connected to the adapter board, and the other end of the adapter board is connected to the host computer.

[0004] Preferably, the alignment mechanism is a target manual alignment mechanism, a positioning fixture alignment mechanism or a CCD alignment mechanism.

[0005] Preferably, the number of the probes is greater than or equal to the number of LED lamp beads in the LED circuit.

[0006] Preferably, the number of the probes is less than the number of LED lamp beads in the LED circuit; a moving mechanism is provided below the alignment mechanism, and the moving mechanism is used to drive the alignment mechanism to move.

[0007] Preferably, the moving mechanism is a manual moving mechanism or a stepping motor moving mechanism.

[0008] Preferably, the detection fixture includes a fixture body, the fixture body is a rectangular parallelepiped structure, the probe is arranged at the bottom of the fixture body, and the LED detection light is arranged at the top of the fixture body.

[0009] Preferably, the LED detection lights are arranged in an array with equal spacing.

[0010] Preferably, it also includes an LED light emitting detection mechanism, which includes a single-chip microcomputer, a sensor module, an alarm light and a buzzer; the single-chip microcomputer is connected to the sensor module and the host computer, and the sensor module is used to detect the brightness of the LED detection light; the alarm light and the buzzer are respectively connected to the single-chip microcomputer and are used to issue an alarm.

[0011] Preferably, the sensor module is a visual camera, and the visual camera is arranged directly above the LED detection light.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention sets a detection fixture with an array probe, uses a positioning mechanism to align the detection fixture with the solder joints of the LED circuit, and inserts the probe into the corresponding electrode of the LED circuit. The outlet area of ​​the LED circuit is adapted to the FPC cable, so that each LED channel is connected to the FPC cable accordingly, and the upper computer is connected to the power supply through the adapter board, and then the probe is connected to the solder joints of the LED circuit, and the LED detection light is powered, so that the LED detection light is illuminated. If an LED detection light displays abnormally, it indicates that the corresponding circuit channel is broken or short-circuited. In addition, by moving the position of the detection fixture, other positions of the LED circuit can be detected, thereby completing the detection of the entire large LED circuit. The present invention can detect the circuit during the production process, thereby completing the product quality control in the production stage, and avoiding the large losses caused by the poor functionality of the circuit that can only be discovered after all LED welding is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the connection structure of the LED line detection device of the embodiment of the utility model;

[0014] Figure 2 A schematic diagram of a detection fixture for an LED circuit detection device according to an embodiment of the utility model;

[0015] Figure 3 A schematic diagram of an LED circuit of an LED circuit detection device according to an embodiment of the utility model;

[0016] exist Figures 1 to 3 In the figure, the corresponding relationship between the names of the components and the numbers of the drawings is as follows:

[0017] 1--Detection fixture, 11--Probe, 12--LED detection light, 13--Fixture body, 2--FPC cable, 3--Adapter board, 4--Upper computer, 5--LED circuit, 51--Solder point, 52--Outlet area. DETAILED DESCRIPTION

[0018] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0019] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Please refer to Figures 1 to 3 The utility model provides an LED circuit detection device, including a detection fixture 1, an alignment mechanism, an FPC cable 2, an adapter board 3 and a host computer 4; the detection fixture 1 is provided with a plurality of probes 11 arranged in an array, and the probes 11 are arranged in coordination with the solder joints 51 of the LED circuit 5; the other end of the probe 11 is connected to an LED detection lamp 12; the detection fixture 1 can be detachably mounted on the alignment mechanism, and the alignment mechanism is used to align the probes 11 of the detection fixture 1 with the solder joints 51 of the LED circuit 5; one end of the FPC cable 2 is press-fitted and connected to the outlet area 52 of the LED circuit 5, and the other end is connected to the adapter board 3, and the other end of the adapter board 3 is connected to the host computer 4.

[0022] In the embodiments of the present utility model, the material of the LED circuit 5 can be a film material such as PET, COP, PA, CPI or PI, or a solid material such as glass, FR4, etc. The conductive layer on the LED circuit 5 can be copper, silver, copper-nickel, indium tin oxide or carbon nanotubes, etc. The preparation of the LED circuit 5 can be yellow light process, laser process, screen printing, 3D printing, etc. After the material of the LED circuit 5 is prepared, the LED circuit 5 material is spread flat on the platform.

[0023] The detection fixture 1 in this embodiment is a fixture with an array probe 11. The probe 11 of this detection fixture 1 corresponds to the solder joint 51 of the LED circuit 5. The other end of the probe 11 is connected to the LED detection light 12. The arrangement of the LED detection light 12 is consistent with the probe 11 and the solder joint 51 of the LED circuit 5, which is convenient for retrieving the bad area circuit corresponding to the LED detection light 12. This detection fixture 1 is aligned with the solder joint 51 on the LED circuit 5 one by one through the alignment mechanism, so that the probe 11 is adapted to the solder joint 51 of the LED circuit 5, and the array probe 11 is inserted into the corresponding electrode of the LED circuit 5. In the outlet area 52 of the LED circuit 5, the FPC cable 2 is used to press and connect it, so that each channel of the LED circuit 5 is correspondingly connected to the line of the FPC cable 2, and the other end of the FPC cable 2 is connected to the adapter board 3 and then to the host computer 4. The host computer 4 can be a computer and can be installed with professional test software. The test software can be used to output different voltages for different LED circuits 5, and can record the lighting status of the LED detection lamp 12, and locate and record the corresponding position.

[0024] In this embodiment, the host computer 4 can be used to provide power, the detection fixture 1 is connected to the solder joint 51 of the LED circuit 5, and the LED detection light 12 on the detection fixture 1 is powered, so that the LED detection light 12 is illuminated. If the LED detection light 12 shows an abnormality, it indicates that the corresponding circuit channel is broken or short-circuited. By moving the position of the detection fixture 1, the movement method can be manual alignment, or a large-scale movement by fixture alignment or other mechanical alignment methods, and then a small-scale movement is performed by the alignment mechanism and aligned with the solder joint 51 on the LED circuit 5, and other positions of the LED circuit 5 can be detected, thereby completing the detection of the entire large LED circuit 5.

[0025] Preferably, the alignment mechanism is a target manual alignment mechanism, a positioning fixture alignment or a CCD alignment mechanism.

[0026] Preferably, the number of the probes 11 is greater than or equal to the number of LED lamp beads of the LED circuit 5. In this embodiment, the number of the probes 11 is greater than the number of LED lamp beads that can be connected to the LED circuit 5, so that the detection range of the detection fixture 1 is larger than the width of the LED circuit 5, and only one test is required to complete the function detection of the LED circuit 5.

[0027] Preferably, the number of the probes 11 is less than the number of LED lamp beads on the LED circuit 5; a moving mechanism is provided below the alignment mechanism, and the moving mechanism is used to drive the alignment mechanism to move. Generally, the LED detection lamps 12 on the detection fixture 1 are less than the LED lamp beads arranged on the LED circuit 5. In subsequent tests, the position can be adjusted by the moving mechanism to perform multiple tests to complete the test of the entire circuit.

[0028] Preferably, the moving mechanism is a manual moving mechanism or a stepper motor moving mechanism. In this embodiment, the positions of the detection fixture 1 and the alignment fixture are adjusted by the moving mechanism to achieve the effect of a small-sized detection fixture 1 detecting a large range of LED circuits 5. The movement method in this embodiment can be manual alignment, or it can be a fixture alignment with an automatic positioning function, or a motor step-by-step advance. For example, a manual moving mechanism or a stepper motor moving mechanism can be used, and then the alignment fixture can be used for positioning, and other positions of the LED circuit 5 can be detected, thereby completing the detection of the entire large LED circuit 5.

[0029] Furthermore, the moving mechanism can also use the cooperation of a servo motor, a lead screw, a nut seat and a linear optical axis to realize the movement of the detection fixture 1, by placing the detection fixture 1 on the linear optical axis and the nut seat, and then driving the lead screw through the servo motor, the lead screw acts on the nut seat and then drives the back and forth movement of the detection fixture 1. Another set of mutually perpendicular lead screw mechanisms can also be set according to the style and size of the LED circuit 5 to realize a large range of movement of the detection fixture 1.

[0030] Furthermore, the alignment method of the alignment mechanism in this embodiment is CCD alignment.

[0031] Preferably, the detection fixture 1 includes a fixture body 13 , the fixture body 13 is a rectangular parallelepiped structure, the probe 11 is arranged at the bottom of the fixture body 13 , and the LED detection light 12 is arranged at the top of the fixture body 13 .

[0032] Preferably, the LED detection lights 12 are arranged in an array with equal spacing. In this embodiment, the LED detection lights 12 are arranged in an array with equal spacing, which facilitates the retrieval of the bad area circuit corresponding to the LED detection lights 12.

[0033] Preferably, it also includes an LED light-emitting detection mechanism, which includes a single-chip microcomputer, a sensor module, an alarm light and a buzzer; the single-chip microcomputer is connected to the sensor module and the host computer 4, and the sensor module is used to detect the brightness of the LED detection light 12; the alarm light and the buzzer are respectively connected to the single-chip microcomputer and used to sound an alarm. In this embodiment, the light-emitting condition of the LED detection light 12 is detected by the sensor module, and the detection information is transmitted to the host computer 4 so that the host computer 4 can perform structural analysis. Once it is detected that the LED detection light 12 is not bright, the host computer 4 compares the voltage output and point distribution of the LED circuit 5, and can quickly determine the accurate damage or short circuit position of the LED circuit 5. At the same time, after receiving the signal that the LED detection light 12 is not bright, the alarm light and the buzzer will sound an alarm to the outside, so that the detection personnel can quickly view and analyze the detection results.

[0034] Preferably, the sensor module is a visual camera, and the visual camera is arranged directly above the LED detection light 12. In this embodiment, by arranging the visual camera directly above the LED detection light 12, photographing the state of the LED detection light 12, and then transmitting the photographing information to the host computer 4 for identification, it is possible to quickly identify whether the LED detection light 12 is not lit. The solution using the visual camera can be iteratively upgraded by updating the algorithm of the recognition software, and the detection results are accurate and the cost is low.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention sets a detection fixture with an array probe, uses a positioning mechanism to align the detection fixture with the solder joints of the LED circuit, and inserts the probe into the corresponding electrode of the LED circuit. The outlet area of ​​the LED circuit is adapted to the FPC cable, so that each LED channel is connected to the FPC cable accordingly, and the upper computer is connected to the power supply through the adapter board, and then the probe is connected to the solder joints of the LED circuit, and the LED detection light is powered, so that the LED detection light is illuminated. If an LED detection light displays abnormally, it indicates that the corresponding circuit channel is broken or short-circuited. In addition, by moving the position of the detection fixture, other positions of the LED circuit can be detected, thereby completing the detection of the entire large LED circuit. The present invention can detect the circuit during the production process, thereby completing the product quality control in the production stage, and avoiding the large losses caused by the poor functionality of the circuit that can only be discovered after all LED welding is completed.

[0036] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An LED line detection device, characterized in that: The invention comprises a detection jig (1), an alignment mechanism, an FPC cable (2), an adapter board (3) and a host computer (4); the detection jig is provided with a plurality of probes (11) arranged in an array, the probes being arranged in coordination with the solder joints (51) of the LED circuit (5); the other end of the probes is connected to an LED detection lamp (12); the detection jig is detachably mounted on the alignment mechanism, the alignment mechanism being used to align the probes of the detection jig with the solder joints of the LED circuit; one end of the FPC cable is press-fitted and connected to the outlet area (52) of the LED circuit, the other end is connected to the adapter board, and the other end of the adapter board is connected to the host computer.

2. The LED line detection device according to claim 1, characterized in that: The alignment mechanism is a target manual alignment mechanism, a positioning fixture alignment or a CCD alignment mechanism.

3. The LED line detection device according to claim 1, characterized in that: The number of the probes is greater than or equal to the number of LED lamp beads in the LED circuit.

4. The LED line detection device according to claim 1, characterized in that: The number of the probes is less than the number of LED lamp beads in the LED circuit; a moving mechanism is arranged below the alignment mechanism, and the moving mechanism is used to drive the alignment mechanism to move.

5. The LED line detection device according to claim 4, characterized in that: The moving mechanism is a manual moving mechanism or a stepping motor moving mechanism.

6. The LED line detection device according to claim 1, characterized in that: The detection jig comprises a jig body (13), the jig body is a rectangular parallelepiped structure, the probe is arranged at the bottom of the jig body, and the LED detection light is arranged at the top of the jig body.

7. The LED line detection device according to claim 6, characterized in that: The LED detection lights are arranged in an array with equal spacing.

8. The LED line detection device according to claim 7, characterized in that: It also includes an LED light emitting detection mechanism, which includes a single-chip microcomputer, a sensor module, an alarm light and a buzzer; the single-chip microcomputer is connected to the sensor module and the host computer, and the sensor module is used to detect the brightness of the LED detection light; the alarm light and the buzzer are respectively connected to the single-chip microcomputer and are used to issue an alarm.

9. The LED line detection device according to claim 8, characterized in that: The sensor module is a visual camera, and the visual camera is arranged directly above the LED detection light.

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