Driving control circuit, display module and display device

Abstract

The invention discloses a driving control circuit, a display module and a display device. The driving control circuit comprises a first circuit board, a second circuit board, at least one flexible circuit board, a first power supply and a driving chip, the flexible circuit board comprises two groups of signal ends, the two groups of signal ends are electrically connected with the first circuit board and the second circuit board respectively, the driving chip is arranged on the first circuit board, and the first power supply is electrically connected with the driving chip. The output end of the driving chip is connected with the flexible circuit boards, target signal ends of the flexible circuit boards are sequentially connected in series to form an enable signal transmission line, enable signals are input to the enable end of the driving chip, and the driving chip is used for receiving the enable signals in a transmission line access state and transmitting the enable signals to the flexible circuit boards. Inputting a driving signal to the signal end of the flexible circuit board in response to the enable signal; and the driving chip is also used for stopping inputting the driving signal to the signal end of the flexible circuit board when the transmission line is in an open-circuit state. The circuit directly disables the driving chip when the circuit board is wrongly connected, and electronic devices are prevented from being damaged.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a drive control circuit, a display module and a display device. Background Art

[0002] Flexible Printed Circuit (FPC) has significant advantages such as high production efficiency, high wiring density, foldable and bendable, thin thickness, and light weight. More and more electronic products' printed circuit boards (PCB) are connected through FPC. With the maturity of FPC preparation technology, the line width and line spacing in FPC can reach 30-40um, and the aperture can reach 40-50um, and it is further developing towards lower line width and line spacing and smaller aperture.

[0003] However, as the line width and line spacing of FPC become smaller and smaller, short circuits, misalignment, missing assembly, etc. are prone to occur during the manual assembly process of FPC and PCB, thereby damaging electronic equipment. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a drive control circuit, a display module and a display device, which can directly disconnect the transmission path of the enable signal when the flexible circuit board is incorrectly connected to the first circuit board or the second circuit board, that is, directly disable the drive chip, thereby preventing the drive chip from continuing to output the drive signal when the circuit board is assembled incorrectly, and avoiding damage to the various devices in the drive control circuit or the electronic devices connected to the drive control circuit.

[0005] In a first aspect, the present application provides a driving control circuit. The circuit includes a first circuit board, a second circuit board, at least one flexible circuit board, a first power supply and a driving chip. The flexible circuit board includes two groups of signal terminals, and the two groups of signal terminals are electrically connected to the first circuit board and the second circuit board respectively. The driving chip is arranged on the first circuit board, and the output terminal of the driving chip is connected to each flexible circuit board respectively. The target signal ends of each flexible circuit board are connected in series in sequence to form an enable signal transmission line, and an enable signal is input to the enable end of the driver chip. The driver chip is used to receive the enable signal when the transmission line is in a pass state, and input a drive signal to the signal end of the flexible circuit board in response to the enable signal; the driver chip is also used to stop inputting the drive signal to the signal end of the flexible circuit board when the transmission line is in a break state.

[0006] In combination with the first aspect, in a possible implementation, the target signal terminal includes at least one first signal terminal in a group of signal terminals connecting the flexible circuit board to the first circuit board, and at least one second signal terminal in a group of signal terminals connecting the flexible circuit board to the second circuit board.

[0007] In combination with the first aspect, in a possible implementation manner, the target signal terminal includes a first signal terminal and a second signal terminal, and the first signal terminal and the second signal terminal are both located at ends of a signal terminal arrangement direction.

[0008] In combination with the first aspect, in a possible implementation, the first signal terminal and the second signal terminal of the flexible circuit board are connected, and the lead-in terminal and the lead-out terminal of adjacent flexible circuit boards are both the first signal terminal or the second signal terminal; along the arrangement direction of the flexible circuit boards, the lead-in terminal of the flexible circuit board located at the end is connected to the first power supply, and the lead-out terminal of the flexible circuit board located at the other end is connected to the enable terminal of the driving chip.

[0009] In combination with the first aspect, in a possible implementation, the target signal terminal includes two first signal terminals and two second signal terminals, the two first signal terminals are located at two ends of the signal terminal arrangement direction, and the two second signal terminals are located at two ends of the signal terminal arrangement direction.

[0010] In combination with the first aspect, in a possible implementation, one of the first signal terminals of the flexible circuit board is connected to one of the second signal terminals, the other first signal terminal is connected to the other second signal terminal, and the two second signal terminals of the flexible circuit board are connected, the two first signal terminals of the flexible circuit board are respectively the lead-in terminal and the lead-out terminal of the flexible circuit board, and the lead-out terminals of adjacent flexible circuit boards are connected to the lead-in terminals; along the arrangement direction of the flexible circuit boards, the lead-in terminal of the flexible circuit board located at the end is connected to the first power supply, and the lead-out terminal of the flexible circuit board located at the other end is connected to the enable terminal of the driving chip.

[0011] In combination with the first aspect, in a possible implementation manner, the first circuit board is a logic board, and the driving chip is a power management chip.

[0012] In combination with the first aspect, in a possible implementation manner, the enable signal is output through the first power supply, or is output through the first circuit board.

[0013] In a second aspect, the present application further provides a display module, which includes a display panel and the driving control circuit described in the first aspect, wherein the second circuit board of the driving control circuit is connected to the display panel.

[0014] In a third aspect, the present application further provides a display device, which includes the display module described in the second aspect.

[0015] The embodiment of the present application provides a driving control circuit, a display module and a display device, wherein the driving control circuit includes a first circuit board, a second circuit board, at least one flexible circuit board, a first power supply and a driving chip, wherein the flexible circuit board includes two groups of signal terminals, the two groups of signal terminals are electrically connected to the first circuit board and the second circuit board respectively, the driving chip is arranged on the first circuit board, the output terminals of the driving chip are respectively connected to each flexible circuit board, the target signal terminals of each flexible circuit board are sequentially connected in series to form an enable signal transmission line, and an enable signal is input to the enable terminal of the driving chip, the driving chip is used to receive the enable signal in the state of the transmission line passage, and input the drive signal to the signal terminal of the flexible circuit board in response to the enable signal; the driving chip is also used to stop inputting the drive signal to the signal terminal of the flexible circuit board in the state of the transmission line disconnection. The embodiment of the present application connects the flexible circuit board in series between the first power supply and the enable terminal of the driving chip, so that when the flexible circuit board is incorrectly connected to the first circuit board or the second circuit board, the transmission path of the enable signal can be directly disconnected, that is, the driving chip can be directly disabled, so as to avoid the driving chip from continuing to output the drive signal in the case of incorrect assembly of the circuit board, and to avoid damage to the various devices in the driving control circuit or the electronic devices connected to the driving control circuit. The drive control circuit provided in the embodiment of the present application can directly implement power-off protection in the event of a circuit board assembly error, avoiding the power-off protection only after the continuous output of the drive signal causes an abnormal situation such as a short circuit or fire in the circuit or device, thereby effectively improving the efficiency of handling circuit abnormalities and improving the safety of the drive control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a schematic diagram of the assembly structure of a circuit board in the prior art; Figure 2 A schematic diagram of a connection mode of an enabling signal transmission circuit in a driving control circuit in one embodiment; Figure 3 A schematic diagram of another connection method of an enabling signal transmission line in one embodiment; Figure 4 A schematic diagram of another connection method of an enabling signal transmission line in one embodiment; Figure 5 A schematic diagram of device types of a driving control circuit in one embodiment; Figure 6 A schematic diagram of another connection method of an enabling signal transmission line in one embodiment; Figure 7 A schematic diagram of a disconnection condition of an enabling signal transmission line in an embodiment; Figure 8A schematic diagram of another disconnection condition of an enabling signal transmission line in one embodiment; Fig. 9 FIG. 1 is a schematic diagram of another circuit-breaking condition of an enabling signal transmission line in an embodiment. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. In addition, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone.

[0019] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0023] FPC has significant advantages such as high production efficiency, high wiring density, foldable and bendable, thin thickness, and light weight. More and more electronic products' PCBs are connected through FPC. With the maturity of FPC preparation technology, the line width and line spacing in FPC can reach 30-40um, and the aperture can reach 40-50um, and it is further developing towards lower line width and line spacing and smaller aperture.

[0024] However, as the line width and line spacing of FPC are getting smaller and smaller, short circuits, misalignment, missing assembly, etc. are prone to occur during the manual assembly process of FPC and PCB, thus damaging electronic equipment. Figure 1 As shown, taking the connection of the logic board Tcon in the display module and any PCB board (i.e., XPCB in the figure) through FPC as an example, the power supply 3V3 continuously enables the power management chip (Power Management Integrated Circuit, PMIC) to output the power voltage signal through the enable end of the PMIC. When there is a problem with the assembly of the FPC and the PCB, the PMIC still continues to output the voltage signal to the FPC, and even outputs the power signal to the display panel through the FPC, which is easy to damage the electronic devices, display panel, etc.

[0025] The embodiment of the present application provides a driving control circuit, which can connect the enable end of the driving chip and the driving power supply of the enable end in series through the signal end of each flexible circuit board, so that when a problem occurs in the connection between the flexible circuit board and the PCB, the connection between the driving power supply and the driving chip is directly disconnected, thereby preventing the output voltage signal of the driving chip from causing damage to the various electronic devices in the display module.

[0026] In one embodiment, Figure 2As shown, a driving control circuit is provided, which includes a first circuit board 10, a second circuit board 20, at least one flexible circuit board 30, a first power supply 40 and a driving chip 50. The flexible circuit board 30 includes two groups of signal terminals, which are electrically connected to the first circuit board 10 and the second circuit board 20 respectively. The driving chip 50 is arranged on the first circuit board 10, and the output terminal of the driving chip 50 is connected to each flexible circuit board 30 respectively. The target signal terminals of each flexible circuit board 30 are sequentially connected in series to form an enable signal transmission line 60, and an enable signal is input to the enable terminal of the driving chip 50. The driving chip 50 is used to receive the enable signal when the transmission line 60 is in a pass state, and input the driving signal to the signal terminal of the flexible circuit board 30 in response to the enable signal; the driving chip 50 is also used to stop inputting the driving signal to the signal terminal of the flexible circuit board 30 when the transmission line 60 is in a break state.

[0027] In the embodiment of the present application, the drive control circuit includes a first circuit board 10 and a second circuit board 20. The first circuit board 10 and the second circuit board 20 are rigid circuit boards, and the first circuit board 10 and the second circuit board 20 are connected through at least one flexible circuit board 30. Specifically, the flexible circuit board 30 includes two groups of signal terminals, and the flexible circuit board 30 is electrically connected to the first circuit board 10 and the second circuit board 20 through the two groups of signal terminals.

[0028] A driving chip 50 is disposed on the first circuit board 10 . The driving chip 50 has an enable terminal EN and an output terminal. The output terminals of the driving chip 50 are connected to the flexible circuit boards 30 respectively.

[0029] The driving control circuit further includes a first power source 40, which is used to provide an enable signal to the enable terminal EN of the driving chip 50. When the enable terminal EN of the driving chip 50 receives the enable signal, the driving signal is output to each flexible circuit board 30.

[0030] Each group of signal terminals of each flexible circuit board 30 has a target signal terminal, and the target signal terminals of each flexible circuit board 30 are sequentially connected in series to form an enable signal transmission circuit 60. The input terminal of the enable signal transmission circuit 60 is connected to the first power supply 40, and the output terminal is connected to the enable terminal EN of the driver chip 50.

[0031] When the enable signal transmission line 60 is connected, the enable signal output by the first power supply 40 is transmitted to the enable end EN of the driver chip 50 through the enable signal transmission line 60, and the driver chip 50 starts working in response to the enable signal and outputs a drive signal to the signal end of each connected flexible circuit board 30; when the enable signal transmission line 60 is open, the enable signal cannot be transmitted, the driver chip 50 is disabled and stops working, that is, it stops inputting the drive signal to the signal end of the flexible circuit board 30.

[0032] Therefore, when the two groups of signal terminals of the flexible circuit board 30 are correctly connected to the first circuit board 10 and the second circuit board 20 respectively, that is, when each signal terminal of the two groups of signal terminals of the flexible circuit board 30 is correctly connected to each pin of the first circuit board 10 and each pin of the second circuit board 20 respectively, the enable signal transmission line 60 is turned on, so that the enable signal can be transmitted to the driving chip 50 through the transmission line 60, enabling the driving chip 50 to work.

[0033] When the two groups of signal terminals of the flexible circuit board 30 are incorrectly connected to the first circuit board 10 and the second circuit board 20, for example, the target signal terminal of the flexible circuit board 30 is short-circuited with the adjacent signal terminal, the pin of the circuit board connected to the target signal terminal is short-circuited with the adjacent pin, the signal terminal of the flexible circuit board 30 is misaligned with the pin of the first circuit board 10 or the second circuit board 20 (i.e., misaligned), and the signal terminal of the flexible circuit board 30 is not in contact with the pin of the first circuit board 10 or the second circuit board 20 (i.e., the flexible circuit board 30 is missing), all of which will cause the enable signal transmission line 60 to be broken, and the enable signal cannot be transmitted to the enable terminal EN of the driver chip 50, thereby causing the driver chip 50 to be disabled and stop working, i.e., stop outputting the drive signal. This can avoid the situation where the flexible circuit board 30 is incorrectly assembled with the first circuit board 10 or the second circuit board 20, and the driver chip 50 continues to output the drive signal, causing damage to various components in the drive control circuit, or components connected to the drive control circuit (e.g., display panel).

[0034] The drive control circuit provided by the embodiment of the present application includes a first circuit board, a second circuit board, at least one flexible circuit board, a first power supply and a drive chip, the flexible circuit board includes two groups of signal terminals, the two groups of signal terminals are electrically connected to the first circuit board and the second circuit board respectively, the drive chip is arranged on the first circuit board, the output terminal of the drive chip is connected to each flexible circuit board respectively, the target signal terminal of each flexible circuit board is connected in series in sequence to form an enable signal transmission line, and an enable signal is input to the enable terminal of the drive chip, the drive chip is used to receive the enable signal in the state of the transmission line passage, and input the drive signal to the signal terminal of the flexible circuit board in response to the enable signal; the drive chip is also used to stop inputting the drive signal to the signal terminal of the flexible circuit board in the state of the transmission line disconnection. The embodiment of the present application connects the flexible circuit board in series between the first power supply and the enable terminal of the drive chip, so that when the flexible circuit board is connected to the first circuit board or the second circuit board incorrectly, the transmission path of the enable signal can be directly disconnected, that is, the drive chip can be directly disabled, so as to avoid the drive chip from continuing to output the drive signal in the case of incorrect assembly of the circuit board, and to avoid damage to the various devices in the drive control circuit or the electronic devices connected to the drive control circuit. The drive control circuit provided in the embodiment of the present application can directly implement power-off protection in the event of a circuit board assembly error, avoiding the power-off protection only after the continuous output of the drive signal causes an abnormal situation such as a short circuit or fire in the circuit or device, thereby effectively improving the efficiency of handling circuit abnormalities and improving the safety of the drive control circuit.

[0035] In one embodiment, Figure 3 As shown, the target signal terminal includes at least one first signal terminal 31 of a group of signal terminals connecting the flexible circuit board 30 to the first circuit board 10 , and at least one second signal terminal 32 of a group of signal terminals connecting the flexible circuit board 30 to the second circuit board 20 .

[0036] Among them, at least one first signal terminal 31 and at least one second signal terminal 32 are connected in series to form an enable signal transmission line inside the flexible circuit board 30. At least one first signal terminal 31 and at least one second signal terminal 32 have an introduction terminal and an extraction terminal, which are respectively connected to the target signal terminals of the adjacent flexible circuit boards 30 to form an enable signal transmission line between the flexible circuit boards 30.

[0037] It can be understood that the lead-in terminal and the lead-out terminal connect all target signal terminals of the flexible circuit board 30 in series.

[0038] In one possible implementation, considering that the end of the flexible circuit board 30 is prone to warping and other problems, which may lead to incorrect connection with the first circuit board 10 or the second circuit board 20, the signal end of the end of the flexible circuit board 30 can be selected as the target signal end, and the end signal end can be connected in series to the enable signal transmission line to achieve a quick response of the drive control circuit to the circuit board connection problem, thereby improving the efficiency and accuracy of the drive control of the drive control circuit.

[0039] The drive control circuit provided in the embodiment of the present application connects at least one signal end in each group of signal ends of the flexible circuit board in series into an enable signal transmission line to connect the flexible circuit board in series between the first power supply and the enable end of the driver chip. Therefore, when the flexible circuit board is incorrectly connected to the first circuit board or the second circuit board, the transmission path of the enable signal can be directly disconnected, that is, the driver chip can be directly disabled, thereby preventing the driver chip from continuing to output the drive signal when the circuit board is assembled incorrectly, thereby avoiding damage to the various devices in the drive control circuit or the electronic devices connected to the drive control circuit.

[0040] In one embodiment, Figure 4 As shown, the target signal terminal includes a first signal terminal 31 and a second signal terminal 32, and the first signal terminal 31 and the second signal terminal 32 are both located at the ends of the signal terminal arrangement direction.

[0041] In this case, the first signal terminal 31 and the second signal terminal 32 of the flexible circuit board 30 are connected, and the lead-in terminal and the lead-out terminal of adjacent flexible circuit boards 30 are both the first signal terminal 31 or the second signal terminal 32; along the arrangement direction of the flexible circuit boards 30, the lead-in terminal of the flexible circuit board 30 located at the end is connected to the first power supply, and the lead-out terminal of the flexible circuit board 30 located at the other end is connected to the enable terminal of the driving chip 50.

[0042] In the embodiment of the present application, the flexible circuit board 10 is described as follows in which each group of signal terminals includes 100 signal terminals, namely PIN1 to PIN100 in the figure. The first signal terminal 31 and the second signal terminal 32 can be PIN1 in the corresponding group of signal terminals, or PIN100 in the corresponding group of signal terminals.

[0043] In this case, the first signal terminal 31 and the second signal terminal 32 of the flexible circuit board 30 are connected to form an enable signal transmission line inside the flexible circuit board 30. One of the first signal terminal 31 and the second signal terminal 32 of the flexible circuit board 30 is used as an introduction terminal, and the other is used as an extraction terminal, which are respectively connected to the target signal terminal of the adjacent flexible circuit board 30 to form an enable signal transmission line between the flexible circuit boards 30. In order to realize the series connection of the target signal terminals of the adjacent flexible circuit boards 30, the introduction terminal and the extraction terminal of the adjacent flexible circuit boards 30 are both the first signal terminal 31 or the second signal terminal 32.

[0044] Along the arrangement direction of the flexible circuit board 30, the lead-in end of the flexible circuit board 30 at the end is connected to the first power supply 40, and the lead-out end of the flexible circuit board 30 at the other end is connected to the enable end of the driver chip 50, and the flexible circuit board is connected in series between the first power supply and the enable end of the driver chip to form a complete enable signal transmission circuit. Under this enable signal transmission circuit, when the flexible circuit board is incorrectly connected to the first circuit board or the second circuit board, the transmission path of the enable signal can be directly disconnected, that is, the driver chip is directly disabled, so as to avoid the driver chip from continuing to output the drive signal when the circuit board is assembled incorrectly, and to avoid damage to the various devices in the drive control circuit or the electronic devices connected to the drive control circuit.

[0045] In one embodiment, in order to further improve the abnormal situation handling capability of the drive control circuit, the number of target signal terminals may be increased. Figure 2 As shown, the target signal terminal includes two first signal terminals 31 and two second signal terminals 32 , the two first signal terminals 31 are located at two ends of the signal terminal arrangement direction, and the two second signal terminals 32 are located at two ends of the signal terminal arrangement direction.

[0046] In this case, one of the first signal terminals 31 of the flexible circuit board 30 is connected to one of the second signal terminals 32, the other first signal terminal 31 is connected to the other second signal terminal 32, and the two second signal terminals 32 of the flexible circuit board 30 are connected, the two first signal terminals 31 of the flexible circuit board 30 are respectively the lead-in terminal and the lead-out terminal of the flexible circuit board 30, and the lead-out terminals and the lead-in terminals of adjacent flexible circuit boards 30 are connected; along the arrangement direction of the flexible circuit boards 30, the lead-in terminal of the flexible circuit board 30 at the end is connected to the first power supply 40, and the lead-out terminal of the flexible circuit board 30 at the other end is connected to the enable terminal of the driving chip 50.

[0047] In the embodiment of the present application, an example is given in which each group of signal terminals of the flexible circuit board 10 includes 100 signal terminals, i.e., PIN1 to PIN100 in the figure. The two first signal terminals 31 can be PIN1 and PIN100 in the corresponding group of signal terminals, respectively, and the two second signal terminals 32 can be PIN1 and PIN100 in the corresponding group of signal terminals, respectively.

[0048] In this case, one of the first signal terminals 31 of the flexible circuit board 30 is connected to one of the second signal terminals 32, the other first signal terminal 31 is connected to the other second signal terminal 32, and the two second signal terminals 32 of the flexible circuit board 30 are connected to form an enable signal transmission line inside the flexible circuit board 30. Two of the two first signal terminals 31 and the two second signal terminals 32 of the flexible circuit board 30 are respectively used as the lead-in terminal and the lead-out terminal, and are respectively connected to the target signal terminals of the adjacent flexible circuit boards 30, forming an enable signal transmission line between the flexible circuit boards 30. In order to realize the series connection of the target signal terminals of the adjacent flexible circuit boards 30, the two first signal terminals 31 of the flexible circuit board 30 are respectively the lead-in terminal and the lead-out terminal of the flexible circuit board 30, and are respectively connected to the lead-out terminal and the lead-in terminal of the adjacent flexible circuit board 30.

[0049] Along the arrangement direction of the flexible circuit board 30, the lead-in end of the flexible circuit board 30 at the end is connected to the first power source 40, and the lead-out end of the flexible circuit board 30 at the other end is connected to the enable end of the driver chip 50, and the flexible circuit board is connected in series between the first power source 40 and the enable end of the driver chip 50 to form a complete enable signal transmission circuit. Under this enable signal transmission circuit, when the flexible circuit board 30 is incorrectly connected to the first circuit board or the second circuit board, the transmission path of the enable signal can be directly disconnected, that is, the driver chip is directly disabled, so as to avoid the driver chip from continuing to output the drive signal when the circuit board is assembled incorrectly, and to avoid damage to the various components in the drive control circuit or the electronic components connected to the drive control circuit.

[0050] In one possible implementation, Figure 5 As shown, the first circuit board 10 is a logic board (i.e., the Tcon board in the figure), and the driving chip 50 is a power management chip PMIC. Among them, PIN1 and PIN100 in each group of signal terminals of the three flexible circuit boards (FPC1, FPC2, FPC3) are target signal terminals, and the target signal terminals are connected to the pins of the first circuit board 10 or the second circuit board 20 to form nodes N1-N12, and the nodes N1-N12 are connected in sequence to form an enable signal transmission line. N13, N14, and N15 are nodes formed by connecting the output terminals of the PMIC to the three flexible circuit boards 30 respectively. The enable signal can be a high-level signal of 3.3V (i.e., 3v3 in the figure).

[0051] In a possible implementation, the enable signal is output through the first power supply 40 , or is output through the first circuit board 10 .

[0052] In the present application embodiment, Figure 2 As shown, the drive control circuit can be provided with a first power supply 40 for outputting an enable signal. In order to reduce the number of components and reduce the structural complexity of the drive control circuit, as shown in FIG. Figure 6As shown, the enable signal can also be directly output through the first circuit board 10. In this case, along the arrangement direction of the flexible circuit board 30, the lead-in end of the flexible circuit board 30 (i.e., the input end of the enable signal transmission line) is connected to the signal end of the first circuit board 10 for outputting the enable signal.

[0053] The following takes the example that the driving control circuit includes three flexible circuit boards (FPC1, FPC2, FPC3), and the target signal end of the flexible circuit board 10 includes two first signal ends 31 and two second signal ends 32, and describes the on-off of the enabling signal transmission line when the flexible circuit board 30 is incorrectly connected to the first circuit board 10 or the second circuit board 20: like Figure 7 As shown, when FPC1 is misaligned with the second circuit board 20, for example, the target signal terminal PIN1 on FPC1 is not connected to the corresponding pin N2 on the second circuit board 20, but is connected to the adjacent pin of the corresponding pin, the transmission line is disconnected at the N2 node, and the enable signal cannot be transmitted to the enable terminal EN of the driver chip 50, the driver chip 50 is disabled, and there is no signal output, thereby avoiding abnormal damage to the electronic device.

[0054] like Figure 8 As shown, when FPC2 is incorrectly connected to the first circuit board 10 and the second circuit board 20, which is equivalent to FPC2 being missing, the transmission line does not form a path, and the enable signal cannot be transmitted to the enable terminal EN of the driver chip 50. The driver chip 50 is disabled and no signal is output, thereby avoiding abnormal damage to electronic devices.

[0055] like Fig. 9 As shown, when a short circuit occurs due to squeezing or the like during the circuit board assembly process, causing the signal end connecting the FPC3 and the first circuit board 10 to short-circuit with the adjacent signal end, the current is no longer transmitted through the nodes N10-N12, and the driving chip 50 cannot receive the enable signal and becomes disabled, and no signal is output, thereby avoiding abnormal damage to the electronic device.

[0056] In one embodiment, a display module is provided, which includes a display panel and the driving control circuit described in the above embodiment. The driving control circuit includes a first circuit board 10, a second circuit board 20, at least one flexible circuit board 30, a first power supply 40 and a driving chip 50. The flexible circuit board 30 includes two groups of signal terminals, which are electrically connected to the first circuit board 10 and the second circuit board 20 respectively. The driving chip 50 is arranged on the first circuit board 10. The output terminal of the driving chip 50 is connected to each flexible circuit board 30 respectively. The target signal terminals of each flexible circuit board 30 are sequentially connected in series to form an enable signal transmission line 60. The enable signal is input to the enable terminal of the driving chip 50. The driving chip 50 is used to receive the enable signal when the transmission line 60 is in a pass state, and input the driving signal to the signal terminal of the flexible circuit board 30 in response to the enable signal; the driving chip 50 is also used to stop inputting the driving signal to the signal terminal of the flexible circuit board 30 when the transmission line 60 is in a break state. The second circuit board 10 of the driving control circuit is connected to the display panel.

[0057] At this time, the driving control circuit is used to output power signals such as analog voltage AVDD, half analog voltage (Half AVDD, HAVDD), high level (Gate High Voltage, VGH), low level (Gate Low Voltage, VGL) and so on required for driving the display panel through the driving chip 50.

[0058] Among them, the display panel can be a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), a micro light-emitting diode (Micro Light-Emitting Diode, MLED), etc.

[0059] The display panel may be connected to the second circuit board 20 via a bonding pad.

[0060] In the embodiment of the present application, the drive control circuit includes a first circuit board 10 and a second circuit board 20. The first circuit board 10 and the second circuit board 20 are rigid circuit boards, and the first circuit board 10 and the second circuit board 20 are connected through at least one flexible circuit board 30. Specifically, the flexible circuit board 30 includes two groups of signal terminals, and the flexible circuit board 30 is electrically connected to the first circuit board 10 and the second circuit board 20 through the two groups of signal terminals.

[0061] A driving chip 50 is disposed on the first circuit board 10 . The driving chip 50 has an enable terminal EN and an output terminal. The output terminals of the driving chip 50 are connected to the flexible circuit boards 30 respectively.

[0062] The driving control circuit further includes a first power source 40, which is used to provide an enable signal to the enable terminal EN of the driving chip 50. When the enable terminal EN of the driving chip 50 receives the enable signal, the driving signal is output to each flexible circuit board 30.

[0063] Each group of signal terminals of each flexible circuit board 30 has a target signal terminal, and the target signal terminals of each flexible circuit board 30 are sequentially connected in series to form an enable signal transmission circuit 60. The input terminal of the enable signal transmission circuit 60 is connected to the first power supply 40, and the output terminal is connected to the enable terminal EN of the driver chip 50.

[0064] When the enable signal transmission line 60 is connected, the enable signal output by the first power supply 40 is transmitted to the enable end EN of the driver chip 50 through the enable signal transmission line 60, and the driver chip 50 starts working in response to the enable signal and outputs a drive signal to the signal end of each connected flexible circuit board 30; when the enable signal transmission line 60 is open, the enable signal cannot be transmitted, the driver chip 50 is disabled and stops working, that is, it stops inputting the drive signal to the signal end of the flexible circuit board 30.

[0065] Therefore, when the two groups of signal terminals of the flexible circuit board 30 are correctly connected to the first circuit board 10 and the second circuit board 20 respectively, that is, when each signal terminal of the two groups of signal terminals of the flexible circuit board 30 is correctly connected to each pin of the first circuit board 10 and each pin of the second circuit board 20 respectively, the enable signal transmission line 60 is turned on, so that the enable signal can be transmitted to the driving chip 50 through the transmission line 60, enabling the driving chip 50 to work.

[0066] When the two groups of signal terminals of the flexible circuit board 30 are incorrectly connected to the first circuit board 10 and the second circuit board 20, for example, the target signal terminal of the flexible circuit board 30 is short-circuited with the adjacent signal terminal, the pin of the circuit board connected to the target signal terminal is short-circuited with the adjacent pin, the signal terminal of the flexible circuit board 30 is misaligned with the pin of the first circuit board 10 or the second circuit board 20 (i.e., misaligned), and the signal terminal of the flexible circuit board 30 is not in contact with the pin of the first circuit board 10 or the second circuit board 20 (i.e., the flexible circuit board 30 is missing), all of which will cause the enable signal transmission line 60 to be broken, and the enable signal cannot be transmitted to the enable terminal EN of the driver chip 50, thereby causing the driver chip 50 to be disabled and stop working, i.e., stop outputting the drive signal. This can avoid the situation where the flexible circuit board 30 is incorrectly assembled with the first circuit board 10 or the second circuit board 20, and the driver chip 50 continues to output the drive signal, causing damage to various components in the drive control circuit, or components connected to the drive control circuit (e.g., display panel).

[0067] The display module provided in the embodiment of the present application includes a display panel and a driving control circuit, the driving control circuit includes a first circuit board, a second circuit board, at least one flexible circuit board, a first power supply and a driving chip, the flexible circuit board includes two groups of signal terminals, the two groups of signal terminals are electrically connected to the first circuit board and the second circuit board respectively, the driving chip is arranged on the first circuit board, the output terminal of the driving chip is connected to each flexible circuit board respectively, and the display panel is connected to the second circuit board of the driving control circuit. The target signal terminals of each flexible circuit board are sequentially connected in series to form an enable signal transmission line, and an enable signal is input to the enable terminal of the driving chip. The driving chip is used to receive the enable signal in the transmission line access state, and input the drive signal to the signal terminal of the flexible circuit board in response to the enable signal; the driving chip is also used to stop inputting the drive signal to the signal terminal of the flexible circuit board in the transmission line disconnection state. The embodiment of the present application connects the flexible circuit board in series between the first power supply and the enable end of the driver chip, so that when the flexible circuit board is incorrectly connected to the first circuit board or the second circuit board, the transmission path of the enable signal can be directly disconnected, that is, the driver chip can be directly disabled, so as to avoid the driver chip from continuously outputting the drive signal when the circuit board is incorrectly assembled, and to avoid damage to the various devices in the drive control circuit or the electronic devices connected to the drive control circuit, thereby avoiding damage to the display panel caused by the drive signal. The drive control circuit provided in the embodiment of the present application can directly implement power-off protection when the circuit board is incorrectly assembled, and avoid power-off protection only after the continuous output of the drive signal causes abnormal conditions such as short circuit and fire in the circuit or device, which effectively improves the efficiency of handling circuit abnormal conditions, improves the safety of the drive control circuit, and thereby improves the safety of the display module.

[0068] In one embodiment, a display device is provided, which includes the display module described in the above embodiment. The display module includes a display panel and a driving control circuit, the driving control circuit includes a first circuit board 10, a second circuit board 20, at least one flexible circuit board 30, a first power supply 40 and a driving chip 50, the flexible circuit board 30 includes two groups of signal terminals, the two groups of signal terminals are electrically connected to the first circuit board 10 and the second circuit board 20 respectively, the driving chip 50 is arranged on the first circuit board 10, the output end of the driving chip 50 is connected to each flexible circuit board 30 respectively, the target signal end of each flexible circuit board 30 is sequentially connected in series to form an enable signal transmission line 60, and an enable signal is input to the enable end of the driving chip 50, the driving chip 50 is used to receive the enable signal when the transmission line 60 is in a pass state, and input the drive signal to the signal end of the flexible circuit board 30 in response to the enable signal; the driving chip 50 is also used to stop inputting the drive signal to the signal end of the flexible circuit board 30 when the transmission line 60 is in a disconnected state. The second circuit board 10 of the driving control circuit is connected to the display panel.

[0069] The driving control circuit is used to output power signals such as AVDD, HAVDD, VGH, VGL, etc. required for driving the display panel through the driving chip 50.

[0070] The display panel may be an LCD, an OLED, an MLED, etc. The display panel may be connected to the second circuit board 20 via a bonding pad.

[0071] In the embodiment of the present application, when the enable signal transmission line 60 is connected, the enable signal output by the first power supply 40 is transmitted to the enable end EN of the driver chip 50 through the enable signal transmission line 60, and the driver chip 50 starts working in response to the enable signal and outputs a drive signal to the signal end of each connected flexible circuit board 30; when the enable signal transmission line 60 is open, the enable signal cannot be transmitted, the driver chip 50 is disabled and stops working, that is, it stops inputting the drive signal to the signal end of the flexible circuit board 30.

[0072] Therefore, when the two groups of signal terminals of the flexible circuit board 30 are correctly connected to the first circuit board 10 and the second circuit board 20 respectively, that is, when each signal terminal of the two groups of signal terminals of the flexible circuit board 30 is correctly connected to each pin of the first circuit board 10 and each pin of the second circuit board 20 respectively, the enable signal transmission line 60 is turned on, so that the enable signal can be transmitted to the driving chip 50 through the transmission line 60, enabling the driving chip 50 to work.

[0073] When the two groups of signal terminals of the flexible circuit board 30 are incorrectly connected to the first circuit board 10 and the second circuit board 20, for example, the target signal terminal of the flexible circuit board 30 is short-circuited with the adjacent signal terminal, the pin of the circuit board connected to the target signal terminal is short-circuited with the adjacent pin, the signal terminal of the flexible circuit board 30 is misaligned with the pin of the first circuit board 10 or the second circuit board 20 (i.e., misaligned), and the signal terminal of the flexible circuit board 30 is not in contact with the pin of the first circuit board 10 or the second circuit board 20 (i.e., the flexible circuit board 30 is missing), all of which will cause the enable signal transmission line 60 to be broken, and the enable signal cannot be transmitted to the enable terminal EN of the driver chip 50, thereby causing the driver chip 50 to be disabled and stop working, i.e., stop outputting the drive signal. This can avoid the situation where the flexible circuit board 30 is incorrectly assembled with the first circuit board 10 or the second circuit board 20, and the driver chip 50 continues to output the drive signal, causing damage to various components in the drive control circuit, or components connected to the drive control circuit (e.g., display panel).

[0074] The display device provided by the embodiment of the present application includes a display module, the display module includes a display panel and a driving control circuit, the driving control circuit includes a first circuit board, a second circuit board, at least one flexible circuit board, a first power supply and a driving chip, the flexible circuit board includes two groups of signal terminals, the two groups of signal terminals are electrically connected to the first circuit board and the second circuit board respectively, the driving chip is arranged on the first circuit board, the output terminal of the driving chip is connected to each flexible circuit board respectively, and the display panel is connected to the second circuit board of the driving control circuit. The target signal terminals of each flexible circuit board are sequentially connected in series to form an enable signal transmission line, and an enable signal is input to the enable terminal of the driving chip. The driving chip is used to receive the enable signal in the transmission line access state, and input the drive signal to the signal terminal of the flexible circuit board in response to the enable signal; the driving chip is also used to stop inputting the drive signal to the signal terminal of the flexible circuit board in the transmission line disconnection state. The embodiment of the present application connects the flexible circuit board in series between the first power supply and the enable end of the driver chip, so that when the flexible circuit board is incorrectly connected to the first circuit board or the second circuit board, the transmission path of the enable signal can be directly disconnected, that is, the driver chip can be directly disabled, so as to avoid the driver chip from continuously outputting the drive signal when the circuit board is assembled incorrectly, and to avoid damage to the components in the drive control circuit or the electronic components connected to the drive control circuit, thereby avoiding damage to the display panel and the display device caused by the drive signal. The drive control circuit provided in the embodiment of the present application can directly implement power-off protection when the circuit board is assembled incorrectly, and avoid power-off protection only after the continuous output of the drive signal causes abnormal conditions such as short circuit and fire in the circuit or device, thereby effectively improving the efficiency of handling circuit abnormal conditions, improving the safety of the display module, and thereby improving the safety of the display device.

[0075] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A drive control circuit, characterized in that: The device comprises a first circuit board, a second circuit board, at least one flexible circuit board, a first power supply and a driving chip, wherein the flexible circuit board comprises two groups of signal terminals, the two groups of signal terminals are electrically connected to the first circuit board and the second circuit board respectively, the driving chip is arranged on the first circuit board, and the output terminal of the driving chip is connected to each of the flexible circuit boards respectively. The target signal ends of the flexible circuit boards are sequentially connected in series to form an enable signal transmission circuit, and the enable signal is input to the enable end of the driver chip. The driver chip is used to receive the enable signal when the transmission circuit is in a path state, and input a drive signal to the signal end of the flexible circuit board in response to the enable signal; the driver chip is also used to stop inputting the drive signal to the signal end of the flexible circuit board when the transmission circuit is in a disconnected state.

2. The circuit according to claim 1, characterized in that The target signal terminal includes at least one first signal terminal in a group of signal terminals connecting the flexible circuit board to the first circuit board, and at least one second signal terminal in a group of signal terminals connecting the flexible circuit board to the second circuit board.

3. The circuit according to claim 2, characterized in that The target signal end includes a first signal end and a second signal end, and the first signal end and the second signal end are both located at ends of the signal end arrangement direction.

4. The circuit according to claim 3, characterized in that The first signal end and the second signal end of the flexible circuit board are connected, and the lead-in end and the lead-out end of the adjacent flexible circuit boards are both the first signal end or the second signal end; Along the arrangement direction of the flexible circuit boards, the lead-in end of the flexible circuit board at one end is connected to the enable signal, and the lead-out end of the flexible circuit board at the other end is connected to the enable end of the driving chip.

5. The circuit according to claim 2, characterized in that The target signal end includes two first signal ends and two second signal ends, the two first signal ends are located at two ends of the signal end arrangement direction, and the two second signal ends are located at two ends of the signal end arrangement direction.

6. The circuit according to claim 5, characterized in that One of the first signal terminals of the flexible circuit board is connected to one of the second signal terminals, another first signal terminal is connected to another second signal terminal, and two second signal terminals of the flexible circuit board are connected, the two first signal terminals of the flexible circuit board are respectively the lead-in terminal and the lead-out terminal of the flexible circuit board, and the lead-out terminals and the lead-in terminals of adjacent flexible circuit boards are connected; Along the arrangement direction of the flexible circuit boards, the lead-in end of the flexible circuit board at one end is connected to the first power source, and the lead-out end of the flexible circuit board at the other end is connected to the enable end of the driving chip.

7. The circuit according to claim 1, characterized in that The first circuit board is a logic board, and the driving chip is a power management chip.

8. The circuit according to claim 1, characterized in that The enable signal is output through the first power supply, or is output through the first circuit board.

9. A display module, characterized in that: The display module comprises a display panel and the driving control circuit according to any one of claims 1 to 8, and the second circuit board of the driving control circuit is connected to the display panel.

10. A display device, characterized in that: The device comprises the display module as claimed in claim 9.

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