CN115003006A - A circuit board, electronic equipment and test method - Google Patents

Abstract

The embodiments of the present application disclose a circuit board, an electronic device, and a test method. By setting a test line and a test port, a test can be performed at one connection end, thereby improving the test efficiency. The circuit board provided by the embodiments of the present application includes a first connection end and a second connection end, the first connection end and the second connection end are provided with connecting pieces for connecting corresponding electronic components, and the circuit board further includes At least one test line, the second connection end is provided with a test port, one end of the test line is connected to the test port, and the other end of the test line is connected to the connector of the first connection end.

Description

A circuit board, electronic equipment and test method

technical field

The present application relates to the field of electronic technology, and in particular, to a circuit board, an electronic device and a testing method.

Background technique

As shown in FIG. 1 , FIG. 1 is a schematic diagram of the connection between the main board, the sub board and the display screen of the electronic device through the circuit board.

The electronic device includes a display screen 4', a main board 1' and a sub board 3', the display screen 4' is, for example, an LCD display screen or an OLED display screen, etc. The display screen 4' communicates with the main board 1' and the sub board through the flexible circuit board 2' 3' is connected. In Figure 1, the flexible circuit board 2' combines the main display screen FPC2a' and the sub-board FPC2b', the main board 1' and the display screen 4' of the electronic device are connected through the main display screen FPC2a', and the power supply circuit of the sub-board 3' 31' and display screen 4' are connected through sub-FPC2b'. When testing the single display screen 4', the BTB connector 22' connected to the main display screen FPC2a' and the main board 1', and the BTB connector 23' connected to the sub-FPC2b' and the sub-board 3' need to be connected to the test equipment. , but the secondary FPC2b' is small, and it is difficult to extend beyond the display screen 4' even if unfolded, and it is difficult for the fixture of the test equipment to hold the secondary FPC2b'.

One solution is to lengthen the sub-FPC2b', but it is difficult to apply the sub-FPC2b' with too much length to the actual product; The test is carried out after merging, but the test efficiency is low, and the BTB connector needs to be tested by snapping with the BTB connector of the transfer FPC, which easily increases the damage ratio of the BTB connector of the flexible circuit board 2'.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a circuit board, an electronic device, and a test method. By setting a test line and a test port, a test can be performed at one connection end, thereby improving the test efficiency.

On the one hand, an embodiment of the present application provides a circuit board, comprising a first connection end and a second connection end, the first connection end and the second connection end are provided with connectors for connecting corresponding electronic components, the The circuit board further includes at least one test line, the second connection end is provided with a test port, one end of the test line is connected to the test port, and the other end of the test line is connected to the connector of the first connection end . A test line and a test port are arranged at the second connection end, and the signals to be tested of other connection ends can be transferred to the second connection end where the test port is set, so that when only testing the second connection end, it is possible to achieve at least The effect of testing the two connections.

Based on one aspect, the embodiments of the present application also provide a first implementation manner of one aspect:

The electronic component connected by the connector of the first connection end is the component to be tested. The first connection end is connected to the component to be tested, and both the connector and the test port of the second connection end can perform signal testing on the component to be tested.

Based on the first implementation of the aspect, the embodiments of the present application also provide the second implementation of the aspect:

The component to be tested is a display screen, and the electronic component connected to the connecting piece of the second connecting end is a printed circuit board. The circuit board is connected to the display screen and the printed circuit board, so that for the second connection terminal test, various signals of the display screen can be tested.

Based on the second implementation of the aspect, the embodiments of the present application also provide the third implementation of the aspect:

The circuit board further includes a third connecting end provided with a connecting piece, the printed circuit board connected by the connecting piece of the second connecting end is a main board, and the electronic element connected by the connecting piece of the third connecting end is a sub-board. The second connection board provided with the test port is connected to the main board, which is more convenient for the clamping test of the test equipment.

Based on the third implementation of the aspect, the embodiments of the present application also provide the fourth implementation of the aspect:

The circuit board is provided with at least one set of main lines and sub-lines, one end of the sub-lines is connected to the corresponding test port, the other end of the sub-lines is connected to the connector of the first connection end, and the main line is Connecting the third connection end and the branch line, the part of the branch line from the position where the bus line is connected to the test port is the test line, and the test line is connected through the bus line the third connection end. The parallel setting of the test circuit and the power signal circuit is satisfied through the main circuit and the branch circuit, which makes the circuit design relatively simple.

Based on the third or fourth implementation of the aspect, the embodiments of the present application further provide the fifth implementation of the aspect:

The main board includes a processor for providing control signals to the display screen; the sub-board includes a power circuit for supplying power to the display screen. The electronic components connected to the component to be tested include the main board and the sub-board. The processor is set on the main board, and the power circuit is set on the sub-board. Both are connected through a circuit board, which can reduce the number of connectors, improve the utilization rate of the main board area, and reduce the hardware cost.

Based on one aspect and the first to fifth implementations of the one aspect, the embodiments of the present application further provide the sixth implementation of the one aspect:

The test port is located between the connector of the second connection end and the edge of the second connection end. The connector and edge have a built-in spacing for easy setup of test ports.

Based on the first to fifth implementations of one aspect, the embodiments of the present application further provide a seventh implementation of one aspect:

The connecting piece of the second connecting end includes a first connecting piece and a second connecting piece, the first connecting piece is used for connecting with the component to be tested, and the test port is located between the second connecting piece and the first connecting piece. between the edges of the two connecting ends. If the test port is arranged between the second connection piece and the edge of the second connection end, the test port can be arranged relatively far away from the first connection piece for transmitting the display screen signal, and the distance between the test port and the first connection piece can be increased. , reducing the difficulty of fixture design and avoiding test interference between the test port and the pins of the first connector.

Based on the first to fifth implementations of one aspect, the embodiments of the present application further provide an eighth implementation of one aspect:

A part of the test line is located beside the connecting piece of the second connecting end and extends to the outside of the connecting piece. This arrangement, on the one hand, facilitates adding test lines on the existing circuit board, and also does not interfere or affect the connection of the existing lines and connecting pieces on the circuit board.

Based on one aspect and the first to eighth implementations of the one aspect, the embodiments of the present application further provide a ninth implementation of the one aspect:

The circuit board is a flexible circuit board. Flexible circuit boards are suitable for connecting electronic components.

Based on one aspect and the first to eighth implementations of the one aspect, the embodiments of the present application further provide the tenth implementation of the one aspect:

At least one of the first connection end and the second connection end is a BTB connector. BTB connectors facilitate the connection of electronic components.

In a second aspect, embodiments of the present application further provide an electronic device, including at least two electronic components and the circuit board according to one aspect and any one of the first to tenth embodiments of the one aspect. It has the same technical effect as the above circuit board, which is not repeated here.

Based on the second aspect, the embodiments of the present application also provide a first implementation manner of the second aspect:

The electronic components of the electronic device include a display screen, a main board and a sub-board, the main board includes a processor for providing control signals to the display screen, and the sub-board is provided with a power supply circuit for supplying power to the display screen , the circuit board includes a third connection end, the connection piece of the first connection end is connected to the display screen, the connection piece of the second connection end is connected to the main board, and the connection piece of the third connection end is connected to the auxiliary the power circuit of the board. The second connection board provided with the test port is connected to the main board of the display screen, which is more convenient for the clamping test of the test equipment.

Based on the first implementation of the second aspect, the embodiments of the present application further provide the second implementation of the second aspect:

The display screen is an LCD or OLED display screen, and the power supply circuit is an LCD driving circuit or an OLED driving circuit. The LCD or OLED display screen has more power signals, and by setting the second connection terminal, fewer connection terminals for testing can be reduced.

In a third aspect, the embodiments of the present application also provide a test method, which is performed by using the circuit board described in any one of the first to tenth embodiments of the one aspect and one aspect. During the test, the circuit is clamped by a fixture. A second connection end of the test port is provided on the board, and the test circuit board of the fixture is connected to the connector of the second connection end and the test port for testing at the same time. In the test method, the test circuit board of the fixture can be connected to the connector of the second connection end and the test port at the same time, which can improve the test efficiency.

Description of drawings

Fig. 1 is the schematic diagram that the main board of electronic equipment, sub-board and display screen are connected through circuit board;

2 is a schematic diagram of the connection between the main board, the sub-board and the display screen of the electronic device through the circuit board in the embodiment of the application;

Fig. 3 is the schematic diagram of the circuit board in Fig. 2;

FIG. 4 is a schematic diagram of the first structure of the second connection end of the circuit board in FIG. 3;

FIG. 5 is a schematic diagram of the circuit board shown in FIG. 3 being clamped by the fixture of the test equipment;

FIG. 6 is a schematic diagram of a second structure of the second connection end of the circuit board in FIG. 3;

7 is a schematic diagram of the connection between the first circuit board element and the second circuit board element of the electronic device in the second embodiment of the application, the first component to be tested, and the second component to be tested through the circuit board;

FIG. 8 is a schematic diagram of a circuit board in a third embodiment of the present application in FIG. 2;

FIG. 9 is a schematic diagram of the principle of a circuit board in an embodiment of the present application;

FIG. 10 is a schematic schematic diagram of another circuit board in an embodiment of the present application.

Detailed ways

An embodiment of the present application provides a circuit board, the connecting end of the circuit board is provided with a connector, through which an electronic component in an electronic device can be connected. The connection mentioned in this application can be an electrical connection or a mechanical connection, or both For electrical and mechanical connections, the electrical connections may transmit power signals and control signals, among others. Specifically, the multiple electronic components of the electronic device may be a main board, a sub-board, and a display screen. Please refer to FIGS. 2-3 . FIG. 2 shows the main board, the sub-board and the display screen of the electronic device in the first embodiment of the application passing through the circuit board. Schematic diagram of connection; FIG. 3 is a schematic diagram of the circuit board in FIG. 2 ; FIG. 4 is a schematic diagram of the first structure of the second connection end 22 of the circuit board in FIG. 3 .

The electronic device in the embodiment of the present application includes a display screen 4, a main board 1 and a sub-board 3, and the display screen 4 is, for example, a liquid crystal display (LCD) display or an organic light-emitting display (organic light-emitting display, OLED). ) display screen, etc., the display screen 4 is connected to the main board 1 and the sub-board 3 through the circuit board. The circuit board can be a flexible printed circuit board 2 (FPC, Flexible Printed Circuit), of course, it can be a hard board or a combination of soft and hard boards. The circuit board in this embodiment is mainly used to realize the connection between the main board 1, the sub-board 3 and the display screen 4, and the flexible circuit board 2 is more suitable for this connection occasion, especially when the display screen 4 is an LCD display screen or an OLED display screen , more connection points are required, and the flexible circuit board 2 is easier to realize this connection. As shown in FIG. 2 , the flexible circuit board 2 is provided with a first connection end 21 for connecting to the display screen 4 of the electronic device, a second connection end 22 for connecting to the main board 1 , and a power supply circuit 31 for connecting the sub-board 3 . The third connection end 23 , each connection end is connected to the main board 1 , the display screen 4 or the sub-board 3 through the provided connector. Each connection end can be a board-to-board (BTB, board to board) connector, as shown in Figure 4, or a zero insertion force (ZIF, zeroinsertion force) connector, etc. The pins of the connector are the connectors of the connection end. The connector is convenient for plug-in connection with the main board 1 and the sub-board 3, but it should be known that each connection end can also be of other types of connection structures. For example, the connector of the connection end can be a connection structure containing a conductive medium. Take 21 as an example, the connection structure can be soldered with the corresponding pins of the module chip (not shown in the figure) of the display screen 4, and the pins used for soldering are the connection pieces of the connection end.

The multiple first lines 25 between the first connection end 21 and the second connection end 22 of the flexible circuit board 2 can directly transmit the data signals and control signals of the main board 1 to the display screen 4, and of course other signals can also be transmitted. In addition, the module chips of the display screen 4 can also transmit signals to the corresponding chips of the main board 1 through the plurality of first lines 25 .

In FIG. 2, the mainboard 1 is provided with a processor, and the processor includes, for example, a SOC (System on Chip) & PMU (power management unit) chip 11, the SOC is a system-on-chip, and the PMU is a power management unit, and the processor may also include a central processing unit ( CPU, Central Processing Unit), image processor (GPU, Graphics Processing Unit), etc. In FIG. 2, the connector of the second connection end 22 is connected to the SOC&PMU chip 11 of the main board 1, and the line between the first connection end 21 and the third connection end 23 of the flexible circuit board 2 can send the signal of the power circuit 31 to the display screen 4 transmission, thereby driving the display screen 4, the power supply circuit 31 is, for example, an LCD driving circuit and an OLED driving circuit, and the power supply circuit 31 may specifically be a power supply chip; the second line 24 between the second connection end 22 and the third connection end 23 also The signal of the main board 1 can be transmitted to the sub-board 3, and the control signal of the SOC&PMU chip 11 in FIG.

It can be seen that in this embodiment, the transmission lines of the control signal, data signal, and power signal of the display screen 4 and the transmission line of the main board 1 to the sub board 3 are all combined into one flexible circuit board 2. In FIG. 2, the The part of the circuit board that transmits signals from the main board 1 to the display screen 4 is defined as the main display screen FPC2a, and the part of the circuit board that transmits the power signal from the sub-board 3 to the display screen 4 is defined as the sub-FPC2b. The sub-FPC2b shown in FIG. 2 is only provided with the power supply circuit 31, but in fact, the sub-FPC can also be provided with more kinds of chips. For example, the sub-FPC2b can also be provided with a motor driving power supply chip, a speaker power amplifier, etc., which is not specified in this embodiment. limit. It can be seen that in this embodiment, the main display screen FPC2a and the sub-board FPC2b are combined, and the two connectors originally required to be connected to the display screen 4 and the sub-board 3 on the main board 1 can be combined into one, thereby reducing the area of the main board 1 occupied by the connectors. , improve the utilization rate of the area of the main board 1, and reduce the number of FPCs and corresponding connection terminals, thus reducing the hardware cost.

On this basis, please continue to refer to FIGS. 2 and 3 . In this embodiment, the flexible circuit board 2 is also provided with a test circuit, and the second connection end 22 is provided with a test port in addition to the connector 221 (shown in FIG. 4 ). 22b, that is, the second connection end 22 is provided with a test port 22b and a connector 221 at the same time, one end of the test line 261 is the test port 22b, and the other end of the test line 261 is connected to the connector of the third connection end 23, that is, it can be connected with the sub-board. 3 to the power supply circuit 31 to establish a connection. In this embodiment, the test circuit 261 provided on the flexible circuit board 2 can be used when testing the display screen 4 of the electronic device.

Specifically, please refer to FIG. 5 , which is a schematic diagram of the circuit board shown in FIG. 3 being clamped by the fixture of the test equipment.

When testing the display screen 4 alone, the data signal and power supply signal of the display screen 4 need to be tested. Therefore, the flexible circuit board 2 is used for the connecting piece of the second connection end 22 connected to the main board 1, and the flexible circuit board 2 The third connection terminal 23 for connecting with the power circuit 31 of the sub-board 3 needs to be connected with the test equipment.

As shown in FIG. 4 , the connector 221 of the second connection end 22 of the flexible circuit board 2 has a plurality of pins 22a, and the fixture 100 in FIG. 5 is provided with a test circuit board 100c. The second connecting end 22 is placed at the corresponding clamping position of the fixture 100 . The clamping position can be provided with a plurality of contacts. The contacts are, for example, the microneedles 100 a shown in FIG. 5 . The plurality of microneedles 100 a are connected to the second connecting end 22 The plurality of pins 22a of 221 correspond. In addition, since the flexible circuit board 2 in this embodiment is also provided with a test line 261 connected to the power circuit 31, the test port of the test line line 261 is also set at the second connection end 22, and accordingly, FIG. 5 The fixture 100 is also provided with a power signal test contact connected to the test circuit board 100c, specifically, the fixture is additionally provided with a power signal test micro-needle 100b that communicates with the test circuit board. When the flexible circuit board 2 is clamped, the clamp can press the flexible circuit board 2 through the cover plate, and the flexible circuit board 2 is generally provided with a reinforcing sheet 28 at the connecting end, and the cover plate can press the reinforcing sheet 28 to ensure The pins 22a of the connecting member 221 of the second connection end 22 can be fully contacted with the microneedle 100a, the test port 22b and the corresponding power signal test microneedle 100b, so as to ensure the connection effect.

After the second connecting end 22 of the flexible circuit board 2 is clamped, the plurality of pins 22a of the connecting piece 221 of the second connecting end 22 of the flexible circuit board 2 and the test port of the second connecting end 22 pass through the corresponding micro-needles, power When the signal test micro-needles are connected to the test circuit board 100c of the fixture 100, the test circuit board 100c can be powered on and execute the corresponding software program, so that the required functional test can be performed on the display screen 4 itself.

Specifically, as shown in FIG. 3 , the flexible circuit board 2 is provided with at least one group of bus lines 27 and branch lines, one end of the branch lines is connected to the above-mentioned test port 22b, the other end of the branch lines is connected to the first connection terminal 21, and the bus line 27 is connected to The third connection terminal 23 and the branch line, the part between the branch line from the position connecting the bus line 27 to the test port 22b is the test line 261, the test line 261 is connected to the third connection end 23 through the bus line 27, and the other part of the branch line A portion is the power signal line 262 . During the test, the power signal output by the power circuit 31 can flow to the bus line 27 through the connecting piece of the third connecting end 23, and the bus line 27 branches to the first connecting end 21 connected to the display screen 4 through the power signal line 262 of the branch line. , flows to the test port 22b via another branch line (ie, the test line 261 ) for testing. That is, the test circuit 261 and the power supply signal line 262 of the power supply circuit 31 connected to the display screen 4 are parallel lines, and the two are connected in parallel to the third connection terminal 23, so that the power supply signal of the power supply circuit 31 can be used for testing and driving the display screen 4 at the same time. use. Of course, this T-shaped line arrangement of the bus line 27 and the branch line is just an example, and the test line 261 and the power signal line 262 can also be connected in other parallel ways, for example, the two are directly connected to the third connection terminal 23, no need The bus line 27 is provided, that is, a V-shaped line or the like is formed. In fact, the setting of the circuit can also be designed according to the relative position of the sub-board 3 and the main board 1, the display screen 4 and the area of the flexible circuit board 2, for example, it can also be a Y-shaped circuit.

In the embodiment of the present invention, when the flexible circuit board 2 is not being tested, its test port 22b is not connected to any external electronic components, and the power signal of the connected sub-board 3 is only supplied to the display screen 4 .

It can be seen that during the test, the control signals and data signals of the display screen 4 can be supplied through the pins 22a of the connecting piece 221 of the second connection end 22 , and the power supply signal of the display screen 4 can be supplied from the test port 22b provided at the second connection end 22 supply, so that the data signal, control signal and power supply signal of the display screen 4 can be tested at the same time through one connection end of one circuit board, so as to improve the test efficiency, and when no test is required, there is no need to do Any changes can still be used normally, and it can still maintain its test function during normal use. Compared with the solution in the background art, in the present embodiment, there is no need to set up a transfer FPC during the test, and there is no need to clamp two connecting ends, and only one second connecting end 22 can be clamped to meet the test requirements.

Please continue to refer to FIG. 4 , in this embodiment, the connecting member 221 of the second connecting end 22 of the flexible circuit board 2 includes a plurality of pins 22 a , and the test circuit 261 can extend from the side of the connecting member 221 of the second connecting end 22 . to the outside of the connector 221 . From the perspective of FIGS. 3 and 4 , the side of the connector 221 facing the first connection end is defined as the inner side, the side away from the first connection end is the outer side, and the outer side is closer to the edge of the second connection end 22 ; The connector 221 includes a plurality of pins 22a arranged in sequence, two sides along the arrangement direction are the two sides of the connector 221, and a part of the test circuit 261 is located on the side of the connector 221 of the second connection end 22, and extends To the outside of the connector 221, this part of the line is the end part of the test line 26. According to the shape of the flexible circuit board 2, most of the lines of the test line 261 can be located on the side of the entire flexible circuit board 2, as long as it can be connected to the first Three connection ends 23 are sufficient. This arrangement, on the one hand, facilitates adding the test circuit 261 on the existing flexible circuit board 2 , and also does not interfere or affect the connection of the existing circuit on the flexible circuit board 2 and the connection member 221 . Of course, the test circuit 261 is not limited to this setting, for example, it can also extend to the inner side of the connecting member 221, where extending to the outside of the connecting member 221 is also convenient for setting the power signal testing microneedle 100b of the fixture.

In addition, although the specific number of test lines 261 is shown in FIGS. 3 and 4 , it is obvious that the flexible circuit board 2 can be provided with multiple test lines 261 and the number of test lines 261 is not limited, for example, the power signal can include 3-5 For the backlight signal and 2 bias signals, the corresponding test lines 261 may be 5-7. When the number of test lines 261 is multiple, part of the test lines 261 may extend from one side of the flexible circuit board 2, and another part of the lines may extend from the other side, or all of them may extend from one side. The actual number of 261 and the available area of the flexible circuit board 2 are selected.

As shown in FIG. 4 , the test port 22b in this embodiment is located between the connecting piece 221 and the edge of the second connecting end 22, so that the test port 22b is easier to arrange to the second connecting end 22, especially the connecting piece 221 and the second connecting end 22. There is a certain area between the outer edges of the two connecting ends 22 , which is convenient for arranging the testing port 22 b , that is, the testing port 22 b is arranged outside the connecting piece 221 .

Please continue to refer to FIG. 6 , which is a schematic diagram of a second structure of the second connection terminal 22 of the circuit board in FIG. 3 .

As shown in FIG. 6 , the connecting piece 221 of the second connecting end 22 includes a first connecting piece 221 a for transmitting signals to the display screen 4 , such as the above-mentioned data signals and control signals, and the test port 22 b is located close to the connection The part of the component 221 other than the first connecting component 221 , that is, the test port 22 b of the test circuit can be as far away as possible from the first connecting component 221 . It can be seen that the first connector 221a is used to transmit the signal of the display screen 4, and the pins 22a and the test port 22b of the first connector 221a must be connected to the test circuit board 100c of the fixture. At this time, the test port 22b and the first connector The distance of 221a cannot be too small. When the distance is too small, when the clamp clamps the second connection end 22, the connection position may be deformed and interfere with each other. Therefore, if the test port 22b is set away from the first connection piece 221a, the test port 22b can be increased. The distance from the first connector 221a reduces the difficulty of fixture design and avoids test interference between the test port 22b and the pins 22a of the first connector 221a.

Specifically in FIG. 6 , the connecting piece 221 of the second connecting end 22 is divided into a first connecting piece 221 and a second connecting piece 221 , and the dividing line X in FIG. 6 divides the connecting piece 221 into a first connecting piece 221 a and a second connecting piece 221 Specifically, in this embodiment, the second connector 221 is used to transmit the control signal of the power supply circuit 31. Since this embodiment is to perform a single test of the display screen 4, it is not necessary to detect the control signal to the power supply circuit 31. The proximity of the test port 22b and the second connecting piece 221b does not affect the test results, so the test port 22b may be located between the outer edges of the second connecting piece 221 and the second connecting end 22 . In this embodiment, the part of the connecting member 221 other than the first connecting member 221a is the second connecting member 221b for transmitting the control signal of the power supply circuit 31. It can be seen that the second connecting member 221b is not limited to this, as long as it is used for transmitting the display The areas of signals other than the signal of the screen 4 belong to the second connector 221b, that is, the signals that do not need to be tested for the single test of the display screen 4 can be attributed to the second connector 221b. It should be understood that the closer the edge of the test port 22b and the second connecting end 22 are, the farther the distance from the connecting piece 221 is, and the less the interference with the connecting piece 221 is, but the closer the test port 22b and the edge are, the closer the test port 22b is to the edge, the greater the distance between the fixture and the connecting piece 221. The clamping and docking of 22b will also increase the difficulty. Therefore, in FIG. 6, the test port 22b has a certain distance from the edge of the second connection end 22 to meet the clamping requirements of the clamp. Piece 221a is set.

In the above-mentioned embodiment, the test port 22b is provided at the connecting end for connecting with the main board 1 , the connecting end is the second connecting end 22 , and the second connecting end 22 in the embodiment shown in FIG. It can be seen that when the connection end connected with the sub-board 3 is easy to clamp, the test port can also be set on the connection end connected with the sub-board 3, so as to transfer the signal to be tested at the connection end connected with the main board 1 to the sub-board. 3-connected connection terminals, the test equipment can also obtain the test signals of other connection terminals when testing one connection terminal. It can be understood that the main board 1 and the sub-board 3 are only the main and sub-divisions for the arrangement in FIG. 2 . In FIG. 2 A circuit board element on which processors such as SOC & PMU chips are arranged is defined as a main board 1 . It can be seen that the main board 1 and the sub board 3 are both circuit board components, which play the role of control and power supply. Obviously, there are various chip structures and arrangements for control and power supply in the circuit board components, and the two circuit board components can be different. There are main and sub-boards, or the circuit board components in the position of sub-board 3 in Figure 2 can also be adjusted to the main board, the circuit board components in the position of main board 1 can also be adjusted to sub-boards, or the main board 1 and sub-board 2 can also be one piece board, which is not limited in this application.

In the embodiment of the present application, the electronic component connected to at least one connection end of the circuit board 2 may be the component to be tested, and the connection end connected to the component to be tested is the first connection end 21 . In the embodiment of FIG. 2 , a first connection end is provided 21, and the component to be tested is the display screen 4, and the electronic components connected to the other connection ends of the circuit board 2 (connection ends other than the first connection end 21) can be circuit board components, so that the circuit board 2 can be used between the electronic components. Connections are made between electronic components and components under test. Here, the connection end connected to the component to be tested is defined as the first connection end 21, and among the other connection ends connected to the first connection end 21, one or more or all of them are second connection ends provided with test ports, and the component to be tested is defined as the second connection end. When testing a single unit, when it is necessary to obtain the signals of other connection ends connected to the first connection end, a second connection end can be tested, and the signals to be tested of the remaining connection ends can be transferred to the corresponding second connection through the test line. at the test port of the terminal.

As shown in FIG. 7 , FIG. 7 shows that the first circuit board element 1 ′ and the second circuit board element 3 ′ of the electronic device in the second embodiment of the application pass through the first component to be tested 4 ′ and the second component to be tested 5 Schematic diagram of circuit board 2 connections. That is, the circuit board 2 in this embodiment is provided with four connection ends, and has two first connection ends connected to the component to be tested, which are the first connection end 21 and the first connection end 29 respectively, and the second connection end 22 is provided The test port, the third connection end 23 is connected to the circuit 31 ′ of the second circuit board element 3 ′, from which it can be seen that, compared with FIG. 2 , the embodiment of FIG. 7 adds a second component to be tested 5 , two circuit boards The circuit 11 ′ and the circuit 31 ′ of the component not only transmit electricity/signal to the first component to be tested 4 ′, but also transmit electricity/signal to the second component to be tested 5 , wherein the circuit 11 ′ is connected to the first connection terminal 21 through the line 25 , is connected to the first connection end 29 through the line 210 , the circuit 31 ′ is connected to the first connection end 21 through the bus line 27 and the branch line 262 , and is connected to the first connection end 29 through the bus line 27 ′ and the branch line 262 ′. At this time, if the second component to be tested 5 needs to be tested, on the second connection end 22 shown in FIG. 7 , in addition to the test port 22b corresponding to the first component to be tested 4' Two test ports 22b' corresponding to the component to be tested 5, the second circuit board element 3' leads a signal to the second connection terminal 22 through the bus line 27' and the test line 261'. When not testing, the second circuit board element 3' 3' is normally connected to the first connection terminal 29 through the bus line 27' and the branch line 262'. Likewise, all the signal tests of the second test component 5 can be completed by testing only one second connection terminal 22 .

It can be seen that, taking FIG. 7 as an example, more connection terminals can be provided, and some or all of these connection terminals can be connected to the first component to be tested 4 ′ and the second component to be tested 5 , and to detect a component to be tested. When , all the connection terminals connected with it can be transferred to at least one connection terminal through the test line for combined test.

Please refer to FIG. 8 again. FIG. 8 is a schematic diagram of the circuit board 2 according to the third embodiment of the present application in FIG. 2 .

In the above embodiment, at least one connection end of the circuit board 2 is connected with the component to be tested, and the other connection ends are connected to the connection end to realize the connection with the component to be tested. It can be seen that the connection end of the circuit board 2 does not have to be connected to the component to be tested, but is only used to connect any electronic component. At this time, a test port is set on at least one connection end, and the target test connection for testing can be omitted. end purpose. As shown in FIG. 8 , the circuit board 2 includes a first connection end 21 and a second connection end 22. The second connection end 22 is provided with a test port 22b. As long as the test equipment is connected to the second connection end 22, it can be simultaneously The connecting piece and the test port of the second connecting end 22 are connected, so as to achieve the purpose of testing multiple lines at the same time.

It can be seen that, according to the connection requirements of the electronic equipment, the circuit board 2 can have a plurality of connection ends, each connection end is connected to a corresponding electronic component, and at least one second connection end provided with a test port is provided, and the test port can be connected to other connection ends , the signals to be tested of other connection ends can be transferred to the second connection end provided with the test port, so that only one connection end can be tested, and the effect of testing multiple connection ends can be achieved.

For the above-mentioned embodiment, please refer to FIGS. 9 and 10 again. FIG. 9 is a schematic diagram of the principle of a circuit board in an embodiment of the application;

FIG. 10 is a schematic schematic diagram of another circuit board in an embodiment of the present application, and FIGS. 9 and 10 are schematic transverse cross-sectional views of the circuit board.

In the above embodiment, the circuit board 2 needs to be set with a test circuit. As shown in FIG. 9 , the circuit board 2 includes a substrate 2b on which a circuit connected to the connector is laid. For example, the circuit is the first circuit shown in FIG. 2 . For the circuit 25 or the second circuit 24, in the embodiment of the present application, a test circuit 261 is also laid on the substrate 2b. In addition, the circuit board 2 further includes a film layer 2a covering the laid circuit. In FIG. 9, the circuit connected to the connector and the test circuit are laid on a layer of substrate 2b. In fact, the circuit board 2 may also include a multi-layer substrate 2b. As shown in FIG. 10, the test circuit 261, and the connector The connected lines can be laid on different base layers 2b separately. It can be known that the lines connected to the connecting pieces of the connecting ends can also be arranged on different base layers 2b, and the test lines 261 can be arranged on any layer or multiple layers.

In addition to the above-mentioned circuit board, this embodiment also provides an electronic product, which includes the circuit board described in any of the above-mentioned embodiments, and has the same technical effect as the above-mentioned circuit board, which is not repeated here. For example, the electronic product may also be a mobile phone, a wearable device, a vehicle-mounted device, an augmented reality (AR)/virtual reality (VR) device, an ultra-mobile personal computer (UMPC), a netbook, A mobile terminal such as a personal digital assistant (PDA), or a professional shooting device such as a digital camera, a single-lens reflex camera/mirror-single camera, an action camera, a PTZ camera, a drone, etc., as long as it has a display screen 4 Any electronic products can be used, and there are no specific restrictions in this program.

The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (15)

1. A circuit board, characterized in that it comprises a first connection end and a second connection end, wherein the first connection end and the second connection end are provided with connectors for connecting corresponding electronic components, and the circuit board It also includes at least one test line, the second connection end is provided with a test port, one end of the test line is connected to the test port, and the other end of the test line is connected to the connector of the first connection end. 2 . The circuit board according to claim 1 , wherein the electronic component connected by the connecting piece of the first connecting end is a component to be tested. 3 . 3 . The circuit board according to claim 2 , wherein the component to be tested is a display screen, and the electronic component connected to the connector of the second connection end is a printed circuit board. 4 . 4 . The circuit board according to claim 3 , wherein the circuit board further comprises a third connecting end provided with a connecting piece, and the printed circuit board to which the connecting piece of the second connecting end is connected is a main board, 4 . The electronic component connected by the connecting piece of the third connecting end is a sub-board. 5 . The circuit board according to claim 4 , wherein the circuit board is provided with at least one group of main lines and branch lines, one end of the branch lines is connected to the corresponding test port, and the The other end is connected to the connector of the first connection end, the main line connects the third connection end and the branch line, and the branch line is connected from the position of the main line to the part between the test ports For the test line, the test line is connected to the third connection terminal through the bus line. 6. The circuit board according to claim 4 or 5, wherein the main board comprises a processor, and the processor is used for providing control signals to the display screen; The display screen is powered. 7 . The circuit board according to claim 1 , wherein the test port is located between the connecting piece of the second connecting end and the edge of the second connecting end. 8 . 8. The circuit board according to any one of claims 2-6, wherein the connecting member of the second connecting end comprises a first connecting member and a second connecting member, and the first connecting member is used to communicate with all the The component to be tested is connected, and the test port is located between the second connecting piece and the edge of the second connecting end. 9 . The circuit board according to claim 1 , wherein a part of the test line is located at the side of the connecting piece of the second connecting end and extends to the side of the connecting piece. 10 . outside. 10 . The circuit board according to claim 1 , wherein the circuit board is a flexible circuit board. 11 . 11 . The circuit board according to claim 1 , wherein at least one of the first connection end and the second connection end is a BTB connector. 12 . 12. An electronic device, characterized by comprising at least two electronic components and the circuit board according to any one of claims 1-11. 13. The electronic device according to claim 12, wherein the electronic components of the electronic device comprise a display screen, a main board and a sub-board, and the main board comprises a processor for providing control signals to the display screen, The sub-board is provided with a power supply circuit for supplying power to the display screen, the circuit board includes a third connection end, the connection piece of the first connection end is connected to the display screen, and the connection piece of the second connection end is connected to the display screen In the main board, the connecting piece of the third connecting end is connected to the power supply circuit of the sub board. 14. The electronic device according to claim 13, wherein the display screen is an LCD or an OLED display screen, and the power supply circuit is an LCD driving circuit or an OLED driving circuit. 15. A test method, characterized in that, the test is carried out by the circuit board according to any one of claims 1-14, and during the test, the second connection end provided with the test port on the circuit board is clamped by a clamp, so The test circuit board of the fixture is simultaneously connected to the connecting piece of the second connecting end and the test port for testing.

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