PCB off-line lightening detection device

Abstract

A PCB off-line lightening detection device belongs to the technical field of circuit board detection, and comprises an LED direct display module, the LED direct display module comprises a light-emitting board and a driving board, the driving board adopts a PCB, the light-emitting board is welded with the PCB through solder paste, after off-line electrification, a microscope is used for observing, and the lightening state of the light-emitting board is detected through an amplified image displayed by a display. When the lamp bead is in a bright state, it is proved that no dead pixel or bad point exists at the position of the PCB; when the LED lamp is in an off-line state, it is proved that dead pixels or bad points exist at the position of the PCB, the specific positions of the dead pixels or the bad points are positioned according to the scale marks on the light-emitting plate, and efficient positioning and accurate positioning of the dead pixels or the bad points of the PCB in the off-line state are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit board detection, and particularly relates to an offline lighting detection device for a PCB board. Background Art

[0002] Currently, when using a microscope to detect a PCB board offline, it is in an unlit mode. During the detection process, the unlit detection method is likely to cause the inability to quickly locate the specific positions of defective points or bad points even when the coordinates of known defective points or bad points are available, resulting in low efficiency and low accuracy. In the prior art, when using a microscope to detect a PCB board, the light source is mostly set above the PCB board, and then the external losses of the PCB board are detected through a camera. A microscope device for PCB detection with the publication number of CN218412285U in the existing documents includes a suspended connection board. A light source is installed below the suspended connection board for illuminating the PCB board during detection, and the light source cooperates with the microscope lens to detect the fault points of the PCB board. Content of the Utility Model

[0003] The technical problem solved by the utility model is to overcome the problem that the detection of the PCB board by the unlit method offline using a microscope affects the positioning of defective points or bad points, and to provide an offline lighting detection device for a PCB board.

[0004] The technical solution adopted by the utility model is as follows:

[0005] An offline lighting detection device for a PCB board includes a product fixing seat. An LED direct display module is installed above the product fixing seat, and a support rod is provided between the LED direct display module and the product fixing seat. The LED direct display module includes a light emitting board and a driving board. A plurality of lamp beads are provided on the light emitting board, and scale lines are further provided around the light emitting board. A wiring terminal is provided on the driving board. The LED direct display module is connected to a data transmission board, and the data transmission board is connected to a power supply.

[0006] The driving board adopts a PCB board, and the PCB board is soldered to the light emitting board through solder paste. The solder paste is applied to the pad positions on the PCB board through a steel plate printing mold.

[0007] The lamp beads are arranged in a dot matrix on the light emitting board.

[0008] The wiring terminal is connected to a conversion plug through a flexible cable, and the conversion plug is connected to the data transmission board through a data cable.

[0009] The interface of the conversion plug is in a funnel shape. The funnel-shaped socket makes it easier to insert the flexible cable into the interface during wiring.

[0010] The data cable adopts a flexible cable, and the data transmission board adopts a HUB circuit board.

[0011] The utility model further includes a microscope, which includes a microscope lens and a base. The product fixing seat is installed on the base, and the microscope lens is connected to a display through a video connection cable.

[0012] The utility model has the following beneficial effects:

[0013] It overcomes the problem that the detection of the PCB board by the method of not lighting up offline under the microscope affects the positioning of bad points or defective points. The specific positions of the bad points or defective points of the PCB board can be quickly located through the lighting state of the LED direct display module, improving the detection efficiency and accuracy of the PCB board. Description of the Drawings

[0014] Figure 1 It is a side view of the utility model;

[0015] Figure 2 It is a perspective view of the utility model;

[0016] Figure 3 It is a schematic diagram of the light-emitting board in the LED direct display module;

[0017] Figure 4 It is a schematic diagram of the driving board in the LED direct display module;

[0018] Figure 5 It is a circuit diagram of the utility model.

[0019] Wherein: 1. Product fixing seat; 2. Support rod; 3. LED direct display module; 4. Light-emitting board; 5. Driving board; 6. Wiring terminal; 7. Adapter plug; 8. Data cable; 9. Data transmission board; 10. Power supply. Detailed Embodiment

[0020] As Figures 1-4 shown, a PCB board offline lighting detection device includes a product fixing seat 1. An LED direct display module 3 is installed above the product fixing seat 1. A support rod 2 is provided between the LED direct display module 3 and the product fixing seat 1; the LED direct display module 3 includes a light-emitting board 4 and a driving board 5. The light-emitting board 4 is provided with a plurality of lamp beads, and scale lines are further provided around the light-emitting board 4. The driving board 5 is provided with a wiring terminal 6; the LED direct display module 3 is connected to a data transmission board 9, and the data transmission board 9 is connected to a power supply 10.

[0021] The driving board 5 adopts a PCB board, and the PCB board is soldered to the light-emitting board 4 through solder paste. The solder paste is applied to the pad positions on the PCB board through a steel plate printing mold.

[0022] The lamp beads are arranged in a dot matrix on the light-emitting board 4.

[0023] The wiring terminal 6 is connected to an adapter plug 7 through a cable, and the adapter plug 7 is connected to the data transmission board 9 through a data cable 8.

[0024] The 7-pin interface of the conversion plug adopts a funnel shape. The funnel-shaped interface makes it easier to insert the ribbon cable into the interface when wiring.

[0025] The data cable 8 adopts a ribbon cable, and the data transmission board 9 adopts a HUB circuit board.

[0026] The utility model further includes a microscope, which includes a microscope lens and a base. The product fixing seat 1 is installed on the base, and the microscope lens is connected to a display through a video connection cable.

[0027] As Figure 5 shown, the power supply 10 supplies power to the LED direct display module 3 and the data transmission board 9. The data transmission board 9 is responsible for transmitting control signals and data signals to the LED direct display module 3 and receiving feedback signals from the LED direct display module 3; in the LED direct display module 3, the light-emitting board 4 is connected to the PCB board, and the position of bad points or defective points on the PCB board is judged based on the lighting state of the lamp beads on the light-emitting board 4 of the LED direct display module 3.

[0028] Specifically, the steel plate printing mold is perforated according to the pad positions on the PCB board. One type of steel plate printing mold is adapted to one type of PCB board. The solder paste is applied to the pads of the PCB board through the steel plate printing mold. The solder paste corresponds to the pad positions on the PCB board and the solder pastes are independent of each other, so short-circuit will not occur; the PCB board is connected to the light-emitting board 4 through the solder paste; the data transmission board 9 controls the brightness and color of the lamp beads on the light-emitting board 4 through set parameter instructions. After being powered on, the position of bad points or defective points on the PCB board is located according to the lighting state of the lamp beads. Observe with a microscope and detect the lighting state of the light-emitting board 4 through the magnified image presented on the display. When the lamp bead is in the lit state, it proves that there are no bad points or defective points at this place on the PCB board; when the LED lamp is in the extinguished state, it proves that there are bad points or defective points at this place on the PCB board, and the specific position of the bad point or defective point is located according to the scale line on the light-emitting board 4. After determining the specific position, use an abnormal label to mark at the bad point or defective point and wait for the next repair process, realizing the efficient and accurate positioning of bad points or defective points on the PCB board in the offline state.

Claims

1. An off-line lighting detection device for a PCB board, comprising a product fixing seat (1), characterized in that, An LED direct display module (3) is installed above the product fixing base (1), and a support rod (2) is provided between the LED direct display module (3) and the product fixing base (1); the LED direct display module (3) includes a light emitting board (4) and a driving board (5), a plurality of lamp beads are provided on the light emitting board (4), scale lines are further provided around the light emitting board (4), and a wiring terminal (6) is provided on the driving board (5); the LED direct display module (3) is connected to a data transmission board (9), and the data transmission board (9) is connected to a power supply (10).

2. The offline lighting detection device for a PCB board according to claim 1, characterized in that The driving board (5) uses a PCB board, and the PCB board is soldered to the light emitting board (4) through solder paste.

3. The off-line lighting detection device for a PCB board according to claim 2, wherein, The solder paste is applied to the pad positions on the PCB board through a steel plate printing mold.

4. A PCB board off-line lighting detection device according to claim 1, characterized in that, The lamp beads are arranged in a dot matrix on the light emitting board (4).

5. The off-line lighting detection device for a PCB board according to claim 1, wherein, The wiring terminal (6) is connected to a conversion plug (7) through a flexible cable, and the conversion plug (7) is connected to the data transmission board (9) through a data cable (8).

6. The off-line lighting detection device for a PCB board according to claim 5, characterized in that, The interface of the conversion plug (7) is funnel-shaped.

7. An off-line lighting detection device for a PCB board according to claim 5, characterized in that, The data cable (8) uses a flexible cable.

8. The offline lighting detection device for a PCB board according to claim 1, characterized in that, The data transmission board (9) uses a HUB circuit board.

9. The off-line lighting detection device for a PCB board according to claim 1, characterized in that, It further includes a microscope, the microscope includes a microscopic lens and a base, the product fixing base (1) is installed on the base, and the microscopic lens is connected to a display through a video connection cable.

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