A display device and a testing method thereof

Abstract

The present invention provides a display device and a testing method thereof, wherein the display device includes: a display panel, a flexible circuit board and a detection circuit board; a male connector is arranged on the flexible circuit board, the male connector includes a plurality of first conductive terminals, the plurality of first conductive terminals include a first test terminal and a second test terminal that are coupled to each other and are not adjacent; the detection circuit board includes a female connector arranged corresponding to the male connector, the female connector includes a plurality of second conductive terminals arranged corresponding to the plurality of first conductive terminals; the detection circuit board includes at least two test signal lines, including a first test signal line coupled to a second conductive terminal corresponding to the first test terminal, and a second test signal line coupled to a second conductive terminal corresponding to the second test terminal, and the first test signal line and the second test signal line form a test loop through the first test terminal and the second test terminal.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display device and its testing method. Background Art

[0002] In existing display devices, due to the design requirements of flexible printed circuits (FPCs), connectors are often used when the module structure is connected to the circuit. For example, board-to-board (BTB) connectors are often used for communication. Common BTB connectors generally consist of two parts: a male and a female. When in use, the conductive terminals of the male and female connectors are connected to enable the module display and touch functions.

[0003] However, during the connection process, some connection defects often occur, such as incomplete or improper connection. These defects can easily cause a large current to be generated at the male and female connector joint, leading to localized high temperatures and heat accumulation. Excessive heat accumulation can result in display problems. Therefore, how to detect connection defects in BTB connectors has become an urgent technical problem to be solved. Summary of the Invention

[0004] This invention provides a display device and its testing method for detecting the engagement status of a BTB connector.

[0005] In a first aspect, embodiments of the present invention provide a display device, comprising:

[0006] A display panel, a flexible circuit board coupled to the display panel, and a detection circuit board coupled to the flexible circuit board;

[0007] The flexible circuit board is provided with a male connector, which includes a plurality of first conductive terminals, wherein the plurality of first conductive terminals include first test terminals and second test terminals that are coupled to each other but not adjacent to each other.

[0008] The detection circuit board includes a female connector corresponding to the male connector, and the female connector includes a plurality of second conductive terminals corresponding to the plurality of first conductive terminals;

[0009] The detection circuit board further includes at least two test signal lines, including a first test signal line coupled to the second conductive terminal corresponding to the first test terminal and a second test signal line coupled to the second conductive terminal corresponding to the second test terminal. The first test signal line and the second test signal line form a test circuit through the first test terminal and the second test terminal. The test circuit is used to perform snap-fit ​​detection on the male connector and the female connector.

[0010] In one possible implementation, the plurality of first conductive terminals extend along a first direction and are arranged sequentially along a second direction intersecting the first direction, with the first test terminal and the second test terminal located on both sides of the centerline of the male connector.

[0011] In one possible implementation, along the first direction, the plurality of first conductive terminals are arranged sequentially as a first row and a second row along the second direction, with the first test terminal and the second test terminal located at the edge of the respective row.

[0012] In one possible implementation, both the first test terminal and the second test terminal are located in the first row.

[0013] In one possible implementation, both the first test terminal and the second test terminal are located in the second row.

[0014] In one possible implementation, the first test terminal is located in the first row, and the second test terminal is located in the second row.

[0015] In one possible implementation, the first test terminal is located in the second row, and the second test terminal is located in the first row.

[0016] In one possible implementation, the plurality of first conductive terminals further include a third test terminal and a fourth test terminal coupled to each other but not adjacent to each other. The third test terminal and the first test terminal are located in the first row, and the fourth test terminal and the second test terminal are located in the second row. The detection circuit board further includes a third test signal line coupled to the second conductive terminal corresponding to the third test terminal, and a fourth test signal line coupled to the fourth test terminal. The third test signal line and the fourth test signal line form another test circuit through the third test terminal and the fourth test terminal. The other test circuit is used to perform a snap-fit ​​test on the male connector and the female connector.

[0017] Secondly, embodiments of the present invention also provide a testing method for a display device as described in any of the above claims, comprising:

[0018] After the male connector is inserted into the female connector, the test circuit is formed by the first test signal line and the second test signal line of the at least two test signal lines, together with the first test terminal and the second test terminal.

[0019] The test circuit is used to detect the engagement status between the male connector and the female connector.

[0020] In one possible implementation, detecting the engagement state between the male connector and the female connector via the test circuit includes:

[0021] Input an induction signal into the first test signal line;

[0022] Obtain the received signal output via the second test signal line;

[0023] The signal strength of the sensed signal and the received signal are compared to obtain the comparison result.

[0024] Based on the comparison results, the engagement status between the male connector and the female connector is determined.

[0025] In one possible implementation, determining the engagement state between the male connector and the female connector based on the comparison result includes:

[0026] If the ratio between the signal strength of the received signal and the signal strength of the sensed signal is not less than the first threshold, it indicates that the male connector and the female connector are properly connected.

[0027] If the ratio between the signal strength of the received signal and the signal strength of the sensed signal is not less than the second threshold and is less than the first threshold, it indicates that the male connector and the female connector are not properly engaged.

[0028] If the ratio between the signal strength of the received signal and the signal strength of the sensed signal is less than the second threshold, it indicates that the male connector and the female connector are not properly connected.

[0029] In one possible implementation, after detecting the engagement state between the male connector and the female connector via the test circuit, the method further includes:

[0030] If the latching status indicates that the male connector and the female connector are not properly latched or that the male connector and the female connector are incorrectly latched, then the output of the voltage signal to the display panel is interrupted.

[0031] The beneficial effects of this invention are as follows:

[0032] This invention provides a display device and its testing method. The display device includes a display panel, a flexible circuit board coupled to the display panel, and a detection circuit board coupled to the flexible circuit board. The flexible circuit board is provided with a male connector, which includes a plurality of first conductive terminals. The plurality of first conductive terminals include first test terminals and second test terminals coupled to each other but not adjacent to each other. The detection circuit board includes a female connector, which includes a plurality of second conductive terminals, corresponding to the male connector. The detection circuit board also includes at least two test signal lines, including a first test signal line coupled to the second conductive terminal corresponding to the first test terminal and a second test signal line coupled to the second conductive terminal corresponding to the second test terminal. The first test signal line and the second test signal line form a test circuit through the first test terminal and the second test terminal. The detection circuit board can perform connection detection on the male connector and the female connector through the test circuit. In other words, under the premise that the non-adjacent first test terminals and second test terminals among the multiple first conductive terminals of the male connector are coupled together, the test circuit formed by the test signal lines coupled to the second conductive terminals corresponding to the first and second test terminals on the female connector can be used to detect the latching status of the male and female connectors. In this way, based on the detected latching status, poor latching between the male and female connectors can be detected in a timely manner, ensuring the performance of the display device. Attached Figure Description

[0033] Figure 1 This is a schematic diagram illustrating one type of misalignment between the male and female connectors in a BTB connector in related technologies.

[0034] Figure 2 This is a schematic diagram illustrating one type of insufficient engagement between the male and female connectors in a BTB connector in related technologies.

[0035] Figure 3 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention;

[0036] Figure 4 for Figure 3 An enlarged schematic diagram of one type of male connector structure;

[0037] Figure 5 for Figure 3 An enlarged schematic diagram of one type of female connector structure;

[0038] Figure 6 for Figure 4 Chinese male connector and Figure 5 An equivalent circuit diagram when the female connector is coupled.

[0039] Figure 7 This is a schematic diagram of one of the structures of a display device according to a first configuration method, in which a male connector and a female connector are arranged.

[0040] Figure 8 This is a schematic diagram of one of the structures of a display device according to a second configuration of a male connector and a female connector, provided by an embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram of one of the structures of a display device provided by an embodiment of the present invention, in which a male connector and a female connector are arranged according to a third configuration.

[0042] Figure 10 This is a schematic diagram of one of the structures of a display device provided in an embodiment of the present invention, in which a male connector and a female connector are arranged according to a fourth configuration.

[0043] Figure 11 This is a schematic diagram of one of the structures of a display device according to a fifth configuration of a male connector and a female connector, provided by an embodiment of the present invention.

[0044] Figure 12 This is a schematic diagram of one of the sixth configuration methods for a display device provided in an embodiment of the present invention, in which a male connector and a female connector are configured.

[0045] Figure 13 A flowchart illustrating a testing method for a display device provided in an embodiment of the present invention;

[0046] Figure 14 for Figure 13 The flowchart of step S102. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Furthermore, the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms "comprising" or "including," or similar terms as used in this invention, mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0049] It should be noted that the dimensions and shapes of the figures in the accompanying drawings do not reflect actual proportions and are intended only to illustrate the content of the invention. Furthermore, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0050] In related technologies, BTB connectors are typically used for communication during the debugging, production testing, and assembly of flexible display modules with the host. A common BTB connector generally consists of two parts: a male connector 01 and a female connector 02. When in use, the conductive terminals of the male connector 01 and the conductive terminals of the female connector 02 can be connected to enable the module's display and touch functions.

[0051] During actual debugging and production testing, the inventors discovered that when connecting the male connector 01 and female connector 02 of the BTB connector, some poor connections often occur, such as incomplete or improper connection. Figure 1 The diagram shows one possible scenario where the male connector 01 and female connector 02 in a BTB connector fail to properly engage. Figure 2 The diagram illustrates one possible scenario where the male connector 01 and female connector 02 are not properly engaged in a BTB connector. These poor engagements can be caused by human error or by manufacturing process deviations that make it difficult for the male and female connectors to properly engage. Poor engagement will lead to problems with module testing and communication. Furthermore, poor engagement can cause a large current to be generated at the junction of the male and female connectors, resulting in localized high temperatures and heat accumulation. For example, if the power signal pin is not properly engaged, energizing the pin will cause excessive current and a small engagement area at the junction of the male and female connectors, leading to localized high temperatures and excessive heat accumulation, which can easily cause display problems.

[0052] In view of this, embodiments of the present invention provide a display device and a testing method for detecting the latching state of a BTB connector.

[0053] like Figure 3 The diagram shown is a structural schematic of a display device according to an embodiment of the present invention. The display device includes:

[0054] Display panel 1, flexible circuit board 2 coupled to the display panel 1, and detection circuit board 3 coupled to the flexible circuit board 2;

[0055] The flexible circuit board 2 is provided with a male connector 4, which includes a plurality of first conductive terminals 40, wherein the plurality of first conductive terminals 40 include a first test terminal 401 and a second test terminal 402 that are coupled to each other but not adjacent.

[0056] The detection circuit board 3 includes a female connector 5 corresponding to the male connector 4, and the female connector 5 includes a plurality of second conductive terminals 50 corresponding to the plurality of first conductive terminals 40.

[0057] The detection circuit board 3 further includes at least two test signal lines, including a first test signal line 501 coupled to the second conductive terminal 50 corresponding to the first test terminal 401, and a second test signal line 502 coupled to the second conductive terminal 50 corresponding to the second test terminal 402. The first test signal line 501 and the second test signal line 502 form a test circuit through the first test terminal 401 and the second test terminal 402. The test circuit is used to perform a snap-fit ​​test on the male connector 4 and the female connector 5.

[0058] The display device can be an organic light-emitting diode (OLED) or a quantum dot light-emitting diode (QLED), and can be applied to any product or component with display function, such as mobile phones, tablets, televisions, monitors, laptops, digital photo frames, and navigators. Other essential components of this display device are readily understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting the invention.

[0059] In practical implementation, the testing circuit board 3 can be a testing fixture circuit board for module testing. This testing fixture circuit board performs pre-inspection of the display module, ensuring the production yield of the display module. Alternatively, the testing circuit board 3 can also be a host-side circuit board that can be assembled with the display module. This host-side circuit board can then be used to test the assembled product, thereby ensuring the production yield of the assembled product. Furthermore, the testing circuit board 3 can be configured according to actual application needs, and no limitation is made here.

[0060] The testing circuit board 3 is provided with a male connector 4, which includes a plurality of first conductive terminals 40. The specific number of the plurality of first conductive terminals 40 can be set according to actual application needs and is not limited here. The plurality of first conductive terminals 40 includes first test terminals 401 and second test terminals 402 that are coupled to each other but not adjacent. That is, the plurality of first conductive terminals 40 includes at least first test terminals 401 and second test terminals 402 that are not adjacent to each other, and the first test terminals 401 and second test terminals 402 are coupled.

[0061] The detection circuit board 3 includes a female connector 5 corresponding to the male connector 4. The female connector 5 includes a plurality of second conductive terminals 50 corresponding to the first conductive terminal 40. The specific number of the plurality of second conductive terminals 50 is equal to the specific number of the plurality of first conductive terminals 40. Each conductive terminal has the same width, and the spacing between adjacent conductive terminals is equal. This ensures a proper connection between the male connector 4 and the female connector 5. Here, "equal" can mean completely equal or approximately equal.

[0062] The detection circuit board 3 further includes a first test signal line 501 coupled to the second conductive terminal 50 corresponding to the first test terminal 401, and a second test signal line 502 coupled to the second conductive terminal 50 corresponding to the second test terminal 402. The first test signal line 501 and the second test signal line 502 form a test circuit through the first test terminal 401 and the second test terminal 402. Since the first test terminal 401 and the second test terminal 402 are coupled to each other, after coupling the first test signal line 501 to the second conductive terminal 50 on the female connector 5 corresponding to the first test terminal 401, and coupling the second test signal line 502 to the second conductive terminal 50 on the female connector 5 corresponding to the second test terminal 402, a test circuit can be formed between the coupled conductive terminals through the first test signal line 501 and the second test signal line 502. Subsequently, the test circuit board 3 can perform a connection test on the male connector 4 and the female connector 5 through the test circuit, thereby realizing the detection of the connection status of the male connector 4 and the female connector 5. In this way, poor connection between the male connector and the female connector can be detected in time, ensuring the performance of the display device.

[0063] Taking the example of the at least two test signal lines including only the first test signal line 501 and the second test signal line 502, the snap-fit ​​detection principle of the test circuit is explained. Combined with... Figure 4and Figure 5 As shown, where, Figure 4 for Figure 3 An enlarged schematic diagram of one structure of the male connector 4 described herein, wherein the first test terminal 401 and the second test terminal 402 are coupled together via an overlap connection. Figure 4 The structure marked by the dashed box C is an overlapping connection line. Figure 5 for Figure 3 An enlarged schematic diagram of one structure of the female connector 5 described herein. (See attached diagram.) Figure 6 As shown Figure 4 The male connector 4 shown is Figure 5 The diagram shows an equivalent circuit diagram of the female connector 5 when coupled, wherein there is a corresponding line load when the male connector 4 and the female connector 5 are coupled. The test circuit is equivalent to an RC detection circuit system, and the signal attenuation based on this circuit system can be expressed by the following formula:

[0064]

[0065] Among them, V in This indicates the induced signal input via the first test signal line 501, V out This indicates the received signal output via the second test signal line 502.

[0066] In practical implementation, since any line design will have line load losses, the connection status between the male connector 4 and the female connector 5 can be determined by comparing the strength of the induced signal input to the first test signal line 501 and the received signal output from the second test signal line 502. If the ratio between the signal strength of the received signal and the signal strength of the induced signal is not less than a first threshold, it indicates that the male connector 4 and the female connector 5 are properly connected. For example, the first threshold can be 95%. Correspondingly, in V... out ≥V in *95% indicates that the male connector 4 and the female connector 5 are properly engaged, i.e., fully engaged. If the ratio between the received signal strength and the sensed signal strength is not less than a second threshold and less than a first threshold, it indicates that the engagement between the male connector 4 and the female connector 5 is insufficient. In this case, the received signal strength is significantly less than the sensed signal strength. For example, the first threshold can be 95%, and the second threshold can be 63%. Correspondingly, when 63% ≤ V out <V in*95% indicates that the male connector 4 and the female connector 5 are not fully engaged. If the ratio between the signal strength of the received signal and the signal strength of the sensed signal is less than the second threshold, it indicates that the male connector 4 and the female connector 5 are incorrectly engaged. For example, the second threshold could be 63%. Correspondingly, in V... out When the percentage is less than 63%, the male connector 4 and the female connector 5 are incorrectly connected. For example, if V... out =0 indicates that there is no contact between the two. Of course, the first threshold and the second threshold can also be set according to the actual application to determine the latching state between the male connector 4 and the female connector 5, which is not limited here.

[0067] In this embodiment of the invention, the structure between the male connector 4 and the female connector 5 can be configured in several ways, but is not limited to these few ways.

[0068] The first setting method is as follows: Figure 7 As shown, the plurality of first conductive terminals 40 extend along a first direction and are arranged sequentially along a second direction intersecting the first direction. The first test terminal 401 and the second test terminal 402 are respectively located on both sides of the center line of the male connector 4, and the center line extends along the first direction. Figure 7 The direction indicated by the middle arrow x is the first direction, and the direction indicated by the arrow y is the second direction. Figure 7 The dashed line L represents the center line.

[0069] In this embodiment of the invention, along the first direction, the plurality of first conductive terminals 40 are arranged in a first row 41 and a second row 42 in the second direction, and the first test terminal 401 and the second test terminal 402 are respectively located at the edge of the corresponding row.

[0070] The second setting method is as follows: Figure 8 As shown, both the first test terminal 401 and the second test terminal 402 are located in the first row 41. Specifically, the first test terminal 401 and the second test terminal 402 may be located at the outermost edge of the first row 41.

[0071] The third setting method is as follows: Figure 9 As shown, both the first test terminal 401 and the second test terminal 402 are located in the second row 42. Specifically, the first test terminal 401 and the second test terminal 402 may be located at the outermost edge of the second row 42.

[0072] The fourth setting method is as follows: Figure 10As shown, the first test terminal 401 is located in the first row 41, and the second test terminal 402 is located in the second row 42.

[0073] The fifth setting method is as follows Figure 11 As shown, the first test terminal 401 is located in the second row 42, and the second test terminal 402 is located in the first row 41.

[0074] The sixth setting method is as follows Figure 12 As shown, the plurality of first conductive terminals 40 further include a third test terminal 403 and a fourth test terminal 404 coupled to each other but not adjacent. The third test terminal 403 and the first test terminal 401 are located in the first row 41, and the fourth test terminal 404 and the second test terminal 402 are located in the second row 42. The detection circuit board 3 also includes a third test signal line 503 coupled to the second conductive terminal 50 corresponding to the third test terminal 403, and a fourth test signal line 504 coupled to the fourth test terminal 404. The third test signal line 503 and the fourth test signal line 504 form another test circuit through the third test terminal 403 and the fourth test terminal 404. The other test circuit is used to perform a snap-fit ​​test on the male connector 4 and the female connector 5. The snap-fit ​​test process of the other test circuit on the male connector 4 and the female connector 5 is the same as the test process of the aforementioned test circuit, and will not be described again here.

[0075] It should be noted that the first test terminal 401, the second test terminal 402, the third test terminal 403 and the fourth test terminal 404 can be located at the outermost edge of the corresponding row, or they can be located at a position other than the outermost edge of the corresponding row. The specific setting depends on the fastening position to be detected in the actual application, and is not limited here.

[0076] In specific implementation, besides the six configuration methods mentioned above for configuring the male connector 4 and the female connector 5, other configuration methods can also be used, which will not be detailed here. Furthermore, it should be noted that the configuration methods shown in the embodiments of the present invention are illustrated using a top view of the male connector 4 and the female connector 5 as examples. This simply illustrates the coupling between the relevant conductive terminals in the male connector 4 via overlapping connections. In practical applications, the overlapping connections between the relevant conductive terminals need to be implemented based on the relevant metal layers in the male connector 4, which will not be detailed here.

[0077] Based on the same inventive concept, such as Figure 13As shown in the figure, this embodiment of the invention also provides a flowchart of a method for testing a display device. The specific structure of the display device used in this testing method is described in the foregoing section and will not be repeated here. Furthermore, the principle by which this testing method solves the problem is similar to that of the aforementioned display device; therefore, the implementation of this testing method can be found in the implementation of the aforementioned display device, and repeated details will not be repeated.

[0078] Combine Figure 13 As shown, the test method includes:

[0079] S101: After inserting the male connector into the female connector, the test circuit is formed by the first test signal line and the second test signal line of the at least two test signal lines, together with the first test terminal and the second test terminal.

[0080] S102: The connection status between the male connector and the female connector is detected by the test circuit.

[0081] In the specific implementation process, steps S101 to S102 are implemented as follows:

[0082] First, after inserting the male connector 4 into the female connector 5, the test circuit is formed by the first test signal line 501 and the second test signal line 502 of the at least two test signal lines, together with the first test terminal 401 and the second test terminal 402. The test circuit formed by the first test signal line 501 and the second test signal line 502 and the first test terminal 401 and the second test terminal 402 is described in the foregoing relevant sections, and will not be repeated here.

[0083] Then, the connection status between the male connector 4 and the female connector 5 is detected through the test circuit. Since any circuit design will have line load losses, even when the non-adjacent first test terminals 401 and second test terminals 402 of the multiple first conductive terminals 40 of the male connector 4 are coupled together, the test circuit formed by the test signal lines coupled to the second conductive terminals 50 on the female connector 5 corresponding to the first test terminals 401 and 402 will inevitably have line load losses. By detecting the load condition of the test circuit, the connection status between the male connector 4 and the female connector 5 can be detected. In this way, based on the detected connection status, poor connection between the male and female connectors can be detected in a timely manner, ensuring the performance of the display device.

[0084] In the embodiment of the present invention, Figure 14As shown, step S102: Detecting the engagement status between the male connector and the female connector through the test circuit includes:

[0085] S201: Input an induction signal to the first test signal line;

[0086] S202: Obtain the received signal output via the second test signal line;

[0087] S203: Compare the signal strength of the sensed signal and the received signal to obtain a comparison result;

[0088] S204: Based on the comparison results, determine the engagement state between the male connector and the female connector.

[0089] In the specific implementation process, combined with Figure 4 and Figure 5 The structural diagram of the connector shown is illustrated below. The specific implementation process of steps S201 to S204 is as follows:

[0090] First, an induced signal can be input to the first test signal line 501 through the detection circuit board 3. The induced signal can be a high-frequency square wave signal, for example, with a frequency greater than 100kHz. Then, the received signal output through the second test signal line 502 is obtained through the test circuit. The induced signal and the received signal are then compared in terms of signal strength to obtain a comparison result. Based on the comparison result, the connection status between the male connector 4 and the female connector 5 is determined. For example, if the signal strength of the received signal is approximately zero, the test circuit is in an open circuit (or disconnected circuit) state, indicating that the connection between the male connector 4 and the female connector 5 is completely insufficient. In this way, the connection status between the male connector 4 and the female connector 5 is detected.

[0091] In the specific implementation process, when adopting Figure 12When setting the male connector 4 and the female connector 5 according to the shown configuration, the specific implementation process of steps S201 to S204 can be as follows: a first sensing signal is loaded through the first test signal line 501, a second sensing signal is loaded through the third test signal line 503, and the received signal of each sensing signal is output through the corresponding test circuit. Then, based on the comparison result of the signal strength of the sensing signal and the received signal of each test circuit, the latching state between the male connector 4 and the female connector 5 at the corresponding position of the corresponding test circuit is determined. For example, the first sensing signal and the second sensing signal can be the same signal. The corresponding sensing signals can be input in chronological order. Accordingly, a first received signal corresponding to the first sensing signal is determined. The signal strength of the first received signal and the first sensing signal is compared to obtain a first comparison result. Then, the connection state between the male connector 4 and the female connector 5 at the corresponding position of the test circuit formed by the first test signal line 501 and the second test signal line 502 is determined. In addition, a second received signal corresponding to the second sensing signal is determined. The signal strength of the second received signal and the second sensing signal is compared to obtain a second comparison result. Then, the connection state between the male connector 4 and the female connector 5 at the corresponding position of the other test circuit formed by the third test signal line 503 and the fourth test signal line 504 is determined.

[0092] Still combined Figure 12 As shown, the first sensing signal and the second sensing signal can also be two signals with opposite polarities. For example, the first sensing signal can be a positive voltage signal, and the second sensing signal can be a negative voltage signal. The connection state between the male connector 4 and the female connector 5 at the corresponding position in each test circuit can be determined based on the signal strength comparison between the sensing signal and the received signal in each test circuit. Furthermore, the first sensing signal and the second sensing signal can also be two signals with different frequencies. For example, the first sensing signal can be a high-frequency signal, and the second sensing signal can be a low-frequency signal. The connection state between the male connector 4 and the female connector 5 at the corresponding position in each test circuit can be determined based on the signal strength comparison between the sensing signal and the received signal in each test circuit. In addition, in practical applications, the first sensing signal and the second sensing signal can be set as needed to perform corresponding connection detection, which will not be detailed here.

[0093] In this embodiment of the invention, step S204: determining the engagement state between the male connector and the female connector based on the comparison result includes:

[0094] If the ratio between the signal strength of the received signal and the signal strength of the sensed signal is not less than the first threshold, it indicates that the male connector and the female connector are properly connected.

[0095] If the ratio between the signal strength of the received signal and the signal strength of the sensed signal is not less than the second threshold and is less than the first threshold, it indicates that the male connector and the female connector are not properly engaged.

[0096] If the ratio between the signal strength of the received signal and the signal strength of the sensed signal is less than the second threshold, it indicates that the male connector and the female connector are not properly connected.

[0097] In specific implementation, the first threshold can be 95%, and the second threshold can be 63%. If the ratio between the signal strength of the received signal and the signal strength of the sensed signal is greater than or equal to 95%, it indicates that the male connector 4 and the female connector 5 are properly connected. If the ratio between the signal strength of the received signal and the signal strength of the sensed signal fluctuates between 63% and 95%, it indicates that the male connector 4 and the female connector 5 are not sufficiently connected. If the ratio between the signal strength of the received signal and the signal strength of the sensed signal fluctuates between 63% and 0%, it indicates that the male connector 4 and the female connector 5 are incorrectly connected. In particular, when the signal strength of the received signal is zero, it indicates that the male connector 4 and the female connector 5 are in a completely uncontacted connection state. Furthermore, the degree of insufficient engagement between the male connector 4 and the female connector 5 can be further categorized according to actual needs. For example, if the ratio between the received signal strength and the sensed signal strength fluctuates between 95% and 86%, it indicates a slight degree of insufficient engagement between the male connector 4 and the female connector 5. If the ratio fluctuates between 86% and 63%, it indicates a severe degree of insufficient engagement between the male connector 4 and the female connector 5. Of course, those skilled in the art can also determine the engagement state between the male connector 4 and the female connector 5 using other values ​​within the range defined by the first and second thresholds according to the engagement detection principle mentioned in this invention, which will not be detailed here.

[0098] In this embodiment of the invention, after step S204: determining the engagement state between the male connector and the female connector based on the comparison result, the method further includes:

[0099] If the latching status indicates that the male connector and the female connector are not properly latched or that the latching between the male connector and the female connector is incorrect, the output of the voltage signal to the display panel is interrupted via the printed circuit board.

[0100] In practice, if the connection status indicates that the male connector 4 and the female connector 5 are not sufficiently or incorrectly connected, the detection circuit board 3 can interrupt the output of voltage signals to the display panel 1, thereby preventing abnormal display caused by localized high temperatures and ensuring the service life of the display panel 1. Conversely, if the connection status indicates that the male connector 4 and the female connector 5 are fully connected, the detection circuit board 3 can provide display driving voltage signals to the driver integrated circuit of the display panel 1, thereby ensuring the normal display of the display panel 1.

[0101] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0102] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A display device, characterized in that: include: A display panel, a flexible circuit board coupled to the display panel, and a detection circuit board coupled to the flexible circuit board; The flexible circuit board is provided with a male connector, the male connector includes a plurality of first conductive terminals, wherein the plurality of first conductive terminals include a first test terminal and a second test terminal coupled to each other and not adjacent to each other; The detection circuit board includes a female connector arranged corresponding to the male connector, and the female connector includes a plurality of second conductive terminals arranged corresponding to the plurality of first conductive terminals; The detection circuit board further includes at least two test signal lines, including a first test signal line coupled to the second conductive terminal corresponding to the first test terminal, and a second test signal line coupled to the second conductive terminal corresponding to the second test terminal, the first test signal line and the second test signal line forming a test loop through the first test terminal and the second test terminal, the test loop being used to perform a buckle detection on the male connector and the female connector; Wherein, the plurality of first conductive terminals extend along a first direction and are arranged in sequence along a second direction intersecting the first direction, and the first test terminal and the second test terminal are respectively located on both sides of a center line of the male connector; Along the first direction, the plurality of first conductive terminals are sequentially arranged into a first row and a second row along the second direction, and the first test terminals and the second test terminals are respectively located at edges of corresponding rows.

2. The display device according to claim 1, wherein: The first test terminal and the second test terminal are both located in the first row.

3. The display device according to claim 1, wherein: The first test terminal and the second test terminal are both located in the second row.

4. The display device according to claim 1, wherein: The first test terminals are located in the first row, and the second test terminals are located in the second row.

5. The display device according to claim 1, wherein: The first test terminal is located in the second row, and the second test terminal is located in the first row.

6. The display device according to claim 1, wherein: The multiple first conductive terminals also include a third test terminal and a fourth test terminal that are coupled to each other and are not adjacent, the third test terminal and the first test terminal are located in the first row, and the fourth test terminal and the second test terminal are located in the second row, the detection circuit board also includes a third test signal line coupled to the second conductive terminal corresponding to the third test terminal, and a fourth test signal line coupled to the fourth test terminal, the third test signal line and the fourth test signal line constitute another test loop through the third test terminal and the fourth test terminal, and the other test loop is used to perform snap connection detection on the male connector and the female connector.

7. A method for testing a display device according to any one of claims 1 to 6, characterized in that: include: After the male connector is inserted into the female connector, the test loop is formed by the first test signal line and the second test signal line of the at least two test signal lines and the first test terminal and the second test terminal; The buckling state between the male connector and the female connector is detected through the test circuit.

8. The testing method according to claim 7, characterized in that: The detecting the buckling state between the male connector and the female connector through the test circuit includes: Inputting a sensing signal to the first test signal line; Obtaining a received signal output via the second test signal line; Comparing the strength of the sensing signal with the received signal to obtain a comparison result; According to the comparison result, the buckling state between the male connector and the female connector is determined.

9. The testing method according to claim 8, characterized in that: Determining the buckle connection state between the male connector and the female connector according to the comparison result includes: If the ratio between the signal strength of the received signal and the signal strength of the sensing signal is not less than a first threshold, it indicates that the male connector and the female connector are well fastened together; If the ratio between the signal strength of the received signal and the signal strength of the sensing signal is not less than the second threshold and less than the first threshold, it indicates that the male connector and the female connector are not sufficiently fastened together; If the ratio between the signal strength of the received signal and the signal strength of the sensing signal is less than the second threshold, it indicates that the male connector and the female connector are incorrectly fastened.

10. The testing method according to claim 9, characterized in that: After detecting the buckling state between the male connector and the female connector through the test loop, the method further includes: If the buckling state indicates that the buckling between the male connector and the female connector is insufficient or the buckling between the male connector and the female connector is incorrect, the output of the voltage signal to the display panel is interrupted.

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