Folding screen device, opening and closing detection device and opening and closing state detection method

Abstract

The present application provides a folding screen device, an opening and closing detection device, and an opening and closing state detection method. The folding screen device adds a mechanical switch at the position where the body contacts the limit groove in the hinge structure. During the opening and closing process of the hinge, the mechanical component located in the limit groove will move left and right. When switching from the unfolded state to the folded state, the mechanical component contacts and squeezes the switch, so that the switch is closed, and then the circuit connected to the switch generates a first electrical signal. When switching from the folded state to the unfolded state, the mechanical component gradually releases the squeezing of the mechanical switch, and the mechanical switch is disconnected, so that the circuit connected to the switch generates a second electrical signal. The processor determines the opening and closing state based on the electrical signal. This solution generates an electrical signal by squeezing or releasing the mechanical switch by the mechanical components in the hinge structure. The mechanical components inside the hinge are not interfered by external electromagnetic signals. Therefore, this solution can improve the reliability and stability of the opening and closing state detection results.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a folding screen device, an opening and closing detection device, and an opening and closing state detection method. Background Art

[0002] With the development of flexible screen technology, folding screen devices based on flexible screens, such as folding screen mobile phones, have been widely produced.

[0003] In the current foldable screen device, a magnet is disposed in one of the two foldable bodies, and a Hall effect sensor or a magnetic sensor is disposed in the other body. The opening and closing state of the foldable screen device is determined by detecting the magnetic field strength through the Hall effect sensor or the magnetic sensor. However, in the actual use of the foldable screen device, magnetic devices in life (for example, magnetic headphones, electronic watches, magnetic chargers, magnetic buttons of handbags, etc.) will affect the magnetic field strength detected by the Hall or magnetometer, resulting in misjudgment of the opening and closing state. For example, the foldable screen device is in a folded state, but the surrounding magnetic devices interfere with the magnetic field of the foldable screen device, causing it to be misjudged as an unfolded state, thereby triggering the foldable screen device to light up the screen or generate an opening and closing prompt sound, etc., which increases the power consumption of the foldable screen device. Summary of the invention

[0004] In view of this, the present application provides a folding screen device, an opening and closing detection device, and an opening and closing state detection method to solve at least part of the above problems. The disclosed technical solutions are as follows:

[0005] In a first aspect, the present application provides a folding screen device, comprising: a first body, a second body, a hinge, a flexible screen, a mechanical switch, a detection circuit and a processor; the first body and the second body are respectively connected to the hinge, and the flexible screen is arranged on the first body and the second body; the hinge comprises a rotating shaft, and a first limiting component rotatably connected to the rotating shaft, and when the hinge is opened and closed, the first limiting component moves in the first limiting groove; the mechanical switch is arranged at a position where the first body contacts the first limiting groove, and the mechanical switch is connected in series in the detection circuit; in the process of the hinge switching from the unfolded state to the folded state, the first limiting component moves in a direction close to the mechanical switch until the mechanical switch is squeezed, so that the mechanical switch is closed, and the detection circuit outputs a first electrical signal; in the process of the hinge switching from the folded state to the unfolded state, the first limiting component moves in a direction away from the mechanical switch until the squeeze on the mechanical switch is released, so that the mechanical switch is disconnected, and the detection circuit outputs a second electrical signal; the opening and closing detection pin of the processor is connected to the output end of the detection circuit, and is used to determine the opening and closing state of the folding screen device based on the electrical signal output by the detection circuit. It can be seen that this solution cleverly uses the characteristics of the mass block (i.e., the limit component) in the hinge moving in the limit slot. A mechanical switch is set at the end of the limit slot. The mass block moves in the limit slot to squeeze (or release) the mechanical switch, so that the detection circuit connected to the mechanical switch generates a corresponding electrical signal and reports it to the processor, which ultimately allows the processor to determine the opening and closing state of the folding screen. The deformation of the mechanical switch will not be interfered by external electromagnetic signals, thereby improving the reliability and stability of the opening and closing state detection results.

[0006] In a possible implementation of the first aspect, the hinge includes a first door panel and a second door panel rotatably connected to the rotating shaft; the first body is fixed to the first door panel, and the first door panel is provided with a first limiting groove for accommodating a first limiting component; the second body is fixed to the second door panel, and the second door panel is provided with a second limiting groove, and the second limiting groove is used to accommodate a second limiting component rotatably connected to the rotating shaft.

[0007] In a possible implementation of the first aspect, the detection circuit includes a current limiting resistor, a first end of the current limiting resistor is connected to a power supply end, a second end of the current limiting resistor is connected to a first end of a mechanical switch, a second end of the mechanical switch is connected to a ground end, and a common connection end between the current limiting resistor and the mechanical switch is connected to an opening and closing detection pin of the processor. In this way, when the first limiting component squeezes the mechanical switch to close it, the detection circuit connected to the switch generates a low-level signal. When the first limiting component releases the squeeze on the mechanical switch, the mechanical switch is disconnected, causing the detection circuit connected to the switch to generate a high-level signal. Therefore, the processor can accurately identify whether the folding screen device is currently in a folded state or an unfolded state based on the type of signal (i.e., high level or low level) received by the opening and closing detection pin.

[0008] In a possible implementation of the first aspect, the mechanical switch is a four-pin trigger switch, and the first end and the third end of the four-pin trigger switch are connected to the second end of the current limiting resistor, and the second end and the fourth end of the four-pin trigger switch are connected to the ground end.

[0009] In a possible implementation manner of the first aspect, the current-limiting resistor is a resistor network in which at least two resistors are connected in series or in parallel, or a resistor network in which at least three resistors are connected in series and in parallel.

[0010] In a possible implementation manner of the first aspect, the first body includes a mainboard, the detection circuit is disposed on the mainboard, and the mechanical switch is connected to the detection circuit on the mainboard through a flexible circuit board.

[0011] In a possible implementation of the first aspect, the second body includes a sub-board, and the flexible circuit board is used to connect the mechanical switch and the sub-board to the main board; the flexible circuit board includes a first branch, a second branch and a third branch, the first branch is electrically connected to the main board, the second branch is electrically connected to the mechanical switch, and the third branch is electrically connected to the sub-board in the folding screen device.

[0012] In a possible implementation of the first aspect, the second branch of the flexible circuit board includes a first pin and a second pin, the first pin is connected to the third pin of the first branch, the second pin is connected to the fourth pin of the first branch, and the third pin and the fourth pin are used to connect the detection circuit.

[0013] In a possible implementation of the first aspect, the first branch of the flexible circuit board is electrically connected to the main board through a first board-to-board connector, and the third branch is electrically connected to the sub-board through a second board-to-board connector.

[0014] In the second aspect, the present application also provides an opening and closing detection device, which is applied to a folding screen device. The folding screen device includes a first body, a second body, a hinge and a processor. The first body and the second body are respectively connected to the hinge. The hinge includes a rotating shaft and a first limiting component rotatably connected to the rotating shaft. When the hinge performs an opening and closing action, the first limiting component moves in the first limiting groove; the opening and closing detection device includes: a mechanical switch and a detection circuit; the mechanical switch is arranged at a position where the first body contacts the first limiting groove, and the mechanical switch is connected in series in the detection circuit; in the process of the hinge switching from the unfolded state to the folded state, the first limiting component moves in a direction close to the mechanical switch until the mechanical switch is squeezed, so that the mechanical switch is closed, and the detection circuit outputs a first electrical signal and transmits it to the processor, so that the processor determines that the folding screen device is in the folded state according to the first electrical signal; in the process of the hinge switching from the folded state to the unfolded state, the first limiting component moves in a direction away from the mechanical switch until the squeezing of the mechanical switch is released, so that the mechanical switch is disconnected, and the detection circuit outputs a second electrical signal and transmits it to the processor, so that the processor determines that the folding screen device is in the unfolded state according to the second electrical signal. In the process of switching between the folding state and the unfolding state of the foldable screen mobile phone, the mechanical parts in the hinge structure squeeze or release the mechanical switch to generate different electrical signals, and then determine whether it is in the folded state or the unfolded state based on the electrical signals. The mechanical parts inside the hinge will not be interfered by external electromagnetic signals, so this solution can improve the reliability and stability of the opening and closing state detection results.

[0015] In the third aspect, the present application also provides an opening and closing detection method, which is applied to the folding screen device of any one of the first aspects, the method comprising: receiving an electrical signal output by the detection circuit; when the electrical signal is a low-level signal, determining that the folding screen device is in a folded state; when the electrical signal is a high-level signal, determining that the folding screen device is in an unfolded state.

[0016] In a fourth aspect, the present application also provides a chip system, comprising: at least one processor and an interface, the interface being used to receive code instructions and transmit them to at least one processor; at least one processor runs the code instructions to implement the opening and closing detection method of the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of various states of a folding screen device provided in an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of the internal structure of a folding screen device provided by an embodiment of the present application when it is in an unfolded state;

[0019] Figure 3 It is a schematic diagram of the internal structure of a folding screen device in a support state provided by an embodiment of the present application;

[0020] Figure 4 is a circuit schematic diagram of a detection circuit provided in an embodiment of the present application;

[0021] Figure 5 is an equivalent circuit diagram of the detection circuit provided in the embodiment of the present application in a switch closed state;

[0022] Figure 6 is a connection diagram of a trigger switch in a detection circuit provided in an embodiment of the present application;

[0023] Figure 7 It is a flow chart of a method for detecting the opening and closing state of a folding screen device provided in an embodiment of the present application;

[0024] Figure 8 It is a schematic diagram of the internal structure of a folding screen device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The terms "first", "second", "third", etc. in the specification, claims and drawings of this application are used to distinguish different objects rather than to limit a specific order.

[0026] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0027] The foldable screen device provided in the embodiments of the present application may include but is not limited to mobile phones, tablet computers, laptop computers, ultramobile personal computers (UMPCs), handheld computers, touch-screen TVs, walkie-talkies, netbooks, POS machines, personal digital assistants (PDAs), wearable devices, virtual reality devices, and other foldable fixed terminals or mobile terminals.

[0028] The present application embodiment is described by taking a foldable screen mobile phone as an example. Figure 1 (1) is a schematic diagram of a foldable screen mobile phone in an unfolded state. Figure 1 (2) is a schematic diagram of a folding screen mobile phone in a stand state. Figure 1 (3) is a schematic diagram of a foldable screen mobile phone in a folded state.

[0029] like Figure 1As shown in (1), the folding screen mobile phone includes a first body 10, a second body 11, a flexible screen 12, and a hinge is provided at the position of the dotted line AB. The first body 10 and the second body 11 are connected to the hinges respectively. The flexible screen 12 is fixed to the first body 10 and the second body 11. Under the action of the hinge, the first body 10 and the second body 11 can be unfolded or folded. Further, the flexible screen 12 is unfolded or folded under the drive of the first body 10 and the second body 11.

[0030] Figure 1 The folding screen mobile phone shown in (1) is in an unfolded state, at which time, the angle α between the first body 10 and the second body 11 is approximately 180° or 180°.

[0031] In this example, the flexible screen 12 is folded outward along the hinge, that is, the first body 10 and the second body 11 move along the directions indicated by the arrows in the figure to Figure 1 The state shown in (2) is that the angle α between the first body 10 and the second body 11 is less than 180° and greater than 0°. Of course, in other examples, the flexible screen of the folding screen mobile phone can be folded inward along the hinge, that is, folded in the direction opposite to the direction indicated by the arrow in the figure.

[0032] Continue to follow Figure 1 Fold in the direction of the arrow (2) until Figure 1 In the folded state shown in (3), the first body 10 and the second body 11 are parallel, that is, the angle α between the first body 10 and the second body 11 is approximately 0° or 0°. In some embodiments, Figure 1 As shown in (3), a rear cover can be provided on the other side of the first body 10 (i.e., the side of the first body opposite to the side provided with the flexible screen 12). In the folded state, the rear covers corresponding to the first body 10 and the second body 11 are folded inside, and the flexible screen is located outside.

[0033] Current foldable screen electronic devices determine the opening and closing status by detecting the magnetic field strength. However, magnetic devices near foldable screen phones in life will affect the magnetic field strength detection results of foldable screen phones, thereby misjudging the opening and closing status. In other words, the accuracy of the opening and closing status is low.

[0034] In order to solve the above technical problems, the present application provides a folding screen device, which includes a hinge, a first body and a second body respectively connected to the hinge, and the first body and the second body are unfolded or folded under the action of the hinge. The hinge includes a first mass block (i.e., a first limiting component) and a second mass block (i.e., a second limiting component) located in a limiting groove. As the hinge opens and closes, the first mass block and the second mass block can move left and right in the limiting groove. A mechanical switch is provided at the position where the limiting groove contacts the first body. In the process of the folding screen device being converted from an unfolded state to a folded state, the first mass block moves toward the direction close to the mechanical switch and squeezes the mechanical switch, so that the mechanical switch switches from an open state to a closed state. Furthermore, the circuit connected to the mechanical switch generates a first electrical signal and sends it to the processor through the FPC. After receiving the first electrical signal, the processor determines that the folding screen mobile phone is in a folded state. During the process of the folding screen device switching from the folded state to the unfolded state, the first mass block moves away from the mechanical switch, and finally releases the squeeze on the mechanical switch to switch it from the closed state to the open state. Furthermore, the circuit connected to the mechanical switch generates a second electrical signal and sends it to the processor through the FPC. After receiving the second electrical signal, the processor determines that the folding screen mobile phone is in the unfolded state. From the above process, it can be seen that this scheme cleverly uses the characteristics of the mass block (i.e., the limiting component) in the hinge moving in the limiting groove. A mechanical switch is set at the end of the limiting groove. The mass block moves in the limiting groove to squeeze (or release) the mechanical switch, so that the detection circuit connected to the mechanical switch generates a corresponding electrical signal and reports it to the processor, and finally the processor determines the opening and closing state of the folding screen. The deformation of the mechanical switch will not be interfered by external electromagnetic signals, thereby improving the reliability and stability of the opening and closing state detection results.

[0035] In addition, this solution does not require improvements to the hinge structure, which is the core mechanical component of the folding screen device, which greatly reduces the R&D and production costs of the entire folding screen device. Moreover, for the folding screen devices that have been on the market, simple modifications can be made, such as adding a mechanical switch, replacing the FPC connected to the mechanical switch, and adding a detection circuit to the mainboard, that is, building a connection branch between the power supply VDD, the current limiting resistor R1, and the ground terminal GND. It can be seen that this solution is not only applicable to the process of producing new folding screen mobile phones, but also to existing folding screen mobile phones that have been on the market, which expands the applicability of the solution.

[0036] See also Figure 2 , showing a schematic diagram of the internal structure of a folding screen mobile phone provided in an embodiment of the present application when it is in an unfolded state.

[0037] Figure 2 It is a schematic diagram of the interior of a foldable screen mobile phone after removing the back cover. Looking from the back cover of the foldable mobile phone, the foldable mobile phone folds in the direction indicated by the arrow in the figure.

[0038] like Figure 2 As shown, the foldable screen mobile phone includes a flexible screen (such as Figure 1 The foldable screen mobile phone includes a screen 12 as shown), a first body 10, a second body 11, a hinge, a flexible printed circuit (FPC), a main board, a sub-board, etc. In addition, the foldable screen mobile phone may also include components such as a speaker and a universal serial bus (USB) interface.

[0039] The mainboard refers to the main circuit board in the mobile phone, and the sub-board refers to the sub-circuit board in the mobile phone. The mainboard and the sub-board respectively carry electronic components for implementing different functions in the mobile phone. For example, the mainboard may include a processor, a camera, etc., and the sub-board may include a signal processing module for a speaker, etc. The mainboard may be arranged on the first body 10, and the sub-board may be arranged on the second body 11.

[0040] It is understandable that the structure illustrated in this embodiment does not constitute a specific limitation on the foldable screen mobile phone. In other embodiments, the foldable screen mobile phone may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0041] like Figure 2 As shown, the hinge includes a first door panel 21, a second door panel 22 and a base 23. The first door panel 21 is used to connect the first body 10, and the second door panel 22 is used to connect the second body 11. The base 23 is located between the first door panel 21 and the second door panel 22, and is rotatably connected with the first door panel 21 and the second door panel 22 to realize the unfolding or folding of the first door panel 21 and the second door panel 22.

[0042] The base 23 includes a rotating shaft in the middle and a first mass block 24 and a second mass block 25 on both sides of the rotating shaft, and the first mass block 24 and the second mass block 25 are respectively fixed on the rotating shaft. The first mass block 24 is in the first limiting groove 27 of the first door panel 21, and the second mass block 25 is in the second limiting groove 26 of the second door panel. The first mass block 24 and the second mass block 25 can be fixed on the base 23 and can rotate with the rotating shaft of the base. A first limiting groove 27 is provided at a position corresponding to the first mass block 24 on the first door panel 21. Similarly, a second limiting groove 26 is provided at a position corresponding to the second mass block 25 on the second door panel 22. During the unfolding or folding process of the folding screen mobile phone, the first mass block 24 and the second mass block 25 move in the corresponding limiting grooves respectively. The mass blocks and limiting grooves cooperate to control the pre-trajectory of the folding or unfolding process.

[0043] In some embodiments of the present application, a mechanical switch 28 is provided at a position where the first body 10 contacts the first limiting groove 27. Both ends of the mechanical switch 28 are electrically connected to the detection circuit.

[0044] In an exemplary embodiment, the detection circuit may be disposed on the main board, and the mechanical switch 28 may be electrically connected to the detection circuit on the main board through an FPC.

[0045] In some embodiments, the FPC is used to electrically connect the sub-board and the mechanical switch to the main board, respectively. Figure 2 As shown, the end of the FPC connected to the main board can be called the first branch, the end of the FPC electrically connected to the mechanical switch can be called the second branch, and the end of the FPC connected to the sub-board can be called the third branch. The second branch is connected to the first branch to realize the electrical connection between the mechanical switch and the main board. The third branch is connected to the first branch to realize the connection between the sub-board and the main board. Exemplarily, the first branch of the FPC can be connected to the main board through a first board-to-board connector (board to board, BTB), and the third branch of the FPC can be connected to the sub-board through a second board-to-board connector (board to board, BTB). This application does not limit the connection method between the second branch of the FPC and the mechanical switch.

[0046] In some embodiments, the second branch of the FPC includes a first pin and a second pin, and correspondingly, the first branch of the FPC includes a third pin and a fourth pin, the first pin is connected to the third pin, and the second pin is connected to the fourth pin, so that the mechanical switch is connected to the mainboard through the FPC.

[0047] In some embodiments, the mechanical switch 28 may be a touch switch, which is a switch that conducts a small current only when pressed. The touch switch is turned on and off by a metal spring or conductive rubber. When the button of the touch switch is pressed, the switch is closed to conduct the circuit connected to it; when the button of the touch switch is released, the switch is opened to disconnect the circuit connected to it.

[0048] like Figure 2 As shown, when the foldable screen mobile phone is in the unfolded state, the first mass block 24 is at the rightmost end of the first limit groove 27, and the second mass block 25 is at the leftmost end of the second limit groove 26. In the process of the foldable screen mobile phone being transformed from the unfolded state to the folded state, the angle between the first door panel 21 and the second door panel 22 gradually decreases, and the first mass block 24 gradually moves to the left in the first limit groove 27, while the second mass block 25 gradually moves to the right in the second limit groove 26. Figure 3As shown, when folded to a certain angle, the first mass block 24 contacts the mechanical switch 28. As the folding continues, the first mass block 24 continues to move to the left in the first limit groove 27 and squeezes the switch button of the mechanical switch to close the switch, thereby turning on the detection circuit connected to it to generate a first electrical signal and transmit it to the processor on the mainboard. After receiving the first electrical signal, the processor determines that the folding screen mobile phone is currently in the folded state, and triggers the screen to enter the folded display state, such as the screen off display.

[0049] In the folded state, the first mass block 24 is at the leftmost end of the first limit groove 27. In the process of the folding screen mobile phone being converted from the folded state to the unfolded state, the angle between the first door panel 21 and the second door panel 22 gradually increases, and the first mass block 24 gradually moves to the right in the first limit groove. When unfolded to a certain angle, the first mass block 24 releases the squeeze on the mechanical switch 28, thereby disconnecting the switch, and then disconnecting the detection circuit connected to it to generate a second electrical signal and transmit it to the processing on the mainboard. After receiving the second electrical signal, the processor determines that the folding screen mobile phone is currently in the unfolded state, triggers the screen to enter the unfolded display state, such as lighting up the screen, and for example, it can also control the speaker to output a corresponding prompt sound.

[0050] In other embodiments of the present application, a mechanical switch can also be set at the position where the second body 11 contacts the second limit groove 26, that is, during the hinge opening and closing process, the second mass block moves left and right to squeeze or release the mechanical switch at the end of the second limit groove, so that the mechanical switch is closed or disconnected, and then the circuit connected to the switch is turned on or off, and finally electrical signals of different levels are generated and transmitted to the processor, and the processor determines whether the mobile phone is in a folded state or an unfolded state according to the detected electrical signals. This method has the same working principle as the above solution, and will not be repeated here.

[0051] See also Figure 4 , shows a circuit schematic diagram of a detection circuit provided in an embodiment of the present application.

[0052] In some embodiments, the detection circuit is disposed on the mainboard, and the switch pin of the mechanical switch 28 is connected to the corresponding pin on the mainboard through the FPC. Accordingly, it is necessary to add a pin for connecting the mechanical switch 28 in the FPC, and to add an FPC pin for connecting the detection circuit pin on the mainboard on the FPC, so that the mechanical switch is connected in series to the detection circuit on the mainboard through the FPC.

[0053] like Figure 4As shown, the switch S1 (i.e., the mechanical switch 28) and the current limiting resistor R1 are connected in series between the power supply VDD and the ground terminal GND. For example, the first end of the current limiting resistor R1 is connected to VDD, the second end of R1 is connected to one end of the switch S1, and the other end of S1 is connected to the ground terminal. The common end P of R1 and S1 is connected to the pin FOLD_INT, and the pin FOLD_INT is used to connect the opening and closing detection pin of the processor.

[0054] In some embodiments, the resistance value of the resistor R1 can be selected according to actual needs, for example, R1=100KΩ. Exemplarily, the resistor R1 can be a resistor network obtained by connecting at least two resistors in series or in parallel, or the resistor R1 can be a resistor network obtained by connecting at least three resistors in series and in parallel. The specific connection form of the resistor R1 is not limited in this application. The power supply VDD can be connected to the 5V power supply terminal on the motherboard.

[0055] The following will be combined Figure 3~Figure 5 Introduce the working principle of the opening and closing detection circuit. Figure 5 It is an equivalent circuit diagram of the detection circuit provided in the embodiment of the present application when the switch is in the closed state.

[0056] like Figure 3 As shown, when the folding screen mobile phone is in the unfolded state, the first mass block 24 is at the rightmost end of the first limit groove 27, and the mechanical switch 28 is not squeezed and is therefore in the disconnected state. The circuit schematic diagram when S1 is in the disconnected state is as follows Figure 4 shown.

[0057] like Figure 4 As shown, when S1 is disconnected, the branch where R1 is located is disconnected, that is, there is no current in this branch and there is no voltage drop on R1. Therefore, the potential of point P is equal to the power supply VDD, that is, the FOLD_INT pin is a high-level signal, and finally the opening and closing detection pin of the processor detects the high-level signal and determines that the folding screen mobile phone is in the unfolded state, thereby triggering the relevant processing flow of the unfolded state, such as lighting up the screen and outputting the unfolding prompt sound.

[0058] like Figure 3 As shown in FIG. 1 , when the folding screen mobile phone is converted from the unfolded state to the folded state, the first mass block 24 moves to the left in the first limit groove 27. When folded to a certain angle, the first mass block 24 squeezes the mechanical switch 28 to close it. At this time, the mechanical switch 28 switches from the open state to the closed state, and the corresponding detection circuit is Figure 4 The equivalent circuit shown converts to Figure 5 The equivalent circuit shown is Figure 5 This is the circuit schematic when S1 is in the closed state.

[0059] like Figure 5As shown, after the switch S1 is closed, point P is connected to the ground terminal GND, that is, the potential of point P is equal to the ground terminal GND, that is, the voltage of point P is "0", that is, the FOLD_INT pin is a low-level signal, and finally the opening and closing detection pin of the processor detects the low-level signal and determines that the folding screen mobile phone is currently in the folded state, thereby triggering the relevant processing flow of the folding state, such as turning off the screen display.

[0060] like Figure 3 As shown, during the process of the folding screen mobile phone being converted from the folded state to the unfolded state, the first mass block 24 moves to the right in the first limit groove 27. After unfolding to a certain angle, the first mass block 24 releases the squeeze on the mechanical switch 28. At this time, the mechanical switch 28 switches from the closed state to the open state, and the corresponding detection circuit is Figure 5 The equivalent circuit shown when S1 is closed switches to Figure 4 The circuit state shown is when S1 is open.

[0061] In some embodiments, the mechanical switch 28 may be a four-pin tact switch, that is, the switch includes four pins. Figure 6 As shown, pins 1 and 3 of the touch switch are connected to the ground terminal GND, and pins 2 and 4 are connected to the resistor R1. Of course, in other embodiments of the present application, touch switches with other numbers of pins can also be used, and the present application does not limit this.

[0062] As can be seen from the above content, the folding screen device provided in the embodiment of the present application is provided with a mechanical switch at the position where the body contacts the limit groove in the hinge structure. During the opening and closing process of the hinge, the mass block located in the limit groove moves left and right. When the mass block moves from a direction away from the mechanical switch to a direction close to the mechanical switch, the mass block continues to move after contacting the switch, which will squeeze the switch, thereby closing the switch, and then causing the detection circuit connected to the switch to generate a first electrical signal. When the mass block moves from the position of squeezing the mechanical switch to a direction away from the switch, the mass block gradually releases the squeezing of the mechanical switch, thereby disconnecting the mechanical switch, and then causing the detection circuit connected to the switch to generate a second electrical signal. The first or second electrical signal is transmitted to the processor, and the processor determines the state of the mobile phone being folded or unfolded according to the electrical signal. It can be seen that in the process of switching between the folding state and the unfolded state of the folding screen mobile phone, the mechanical components in the hinge structure squeeze or release the squeeze on the mechanical switch, thereby generating different electrical signals, and then determining whether it is currently in the folded state or the unfolded state according to the electrical signal. The mechanical components inside the hinge will not be interfered by external electromagnetic signals. Therefore, this solution can improve the reliability and stability of the opening and closing state detection results.

[0063] Moreover, this solution cleverly utilizes the characteristics of the original mechanical structure (i.e., the mass block) in the hinge structure that moves left and right (moves left and right in the limit groove) during the opening and closing process, and adds a mechanical switch at the position where the first body contacts the limit groove. There is no need to improve the hinge structure, which is the core mechanical component of the folding screen device. This greatly reduces the research and development and production costs of the entire folding screen device.

[0064] In addition, for the folding screen devices that have been on the market, simple modifications can be made, such as adding a mechanical switch, replacing the FPC connected to the mechanical switch, and adding a detection circuit on the mainboard, that is, building a connection path between the power supply VDD, the current limiting resistor R1 and the ground terminal GND. It can be seen that this solution is not only applicable to the process of producing new folding screen mobile phones, but also to existing folding screen mobile phones that have been on the market, which expands the applicability of this solution.

[0065] On the other hand, the present application also provides a method for detecting the opening and closing of a folding screen device, which is applied to the processor of the folding screen device provided in the above embodiment, such as Figure 7 As shown, the method may include:

[0066] S101, reading the electrical signal of the opening and closing detection pin.

[0067] In an exemplary embodiment, the level signal of the opening and closing detection pin FOLD_INT is input into the analog-to-digital conversion module, converted into a digital electrical signal, and transmitted to the processor, that is, the processor can obtain the digital signal of the opening and closing detection pin FOLD_INT.

[0068] S102: If the electrical signal of the opening and closing detection pin is a low-level signal, it is determined that the folding screen device is in a folded state.

[0069] according to Figure 5 It can be seen from the equivalent circuit shown that when the folding screen device is in the folded state, the mass block squeezes the switch S1 to close it. When S1 is closed, the potential of point P is equal to the potential of the ground terminal GND, that is, the "0" potential, and the opening and closing detection pin collects the potential of point P, that is, the opening and closing detection pin is a low-level signal. Therefore, when the processor determines that the electrical signal of the opening and closing detection pin is a low level, it determines that the folding screen device is currently in the folded state.

[0070] S103, if the electrical signal of the opening and closing detection pin is a high-level signal, it is determined that the folding screen device is in the unfolded state.

[0071] according to Figure 4It can be seen from the equivalent circuit diagram shown that when the folding screen device switches from the folded state to the unfolded state, the mass block releases the squeeze on the switch S1, at which time S1 is disconnected, and the point P is at the same potential as the power supply VDD, that is, the point P is at a high level potential. Therefore, when the processor determines that the electrical signal of the opening and closing detection pin is at a high level, it determines that the folding screen device is currently in the unfolded state.

[0072] The present embodiment provides a method for detecting the opening and closing state of a folding screen mobile phone, in which a mechanical switch is arranged at the position where the body of the folding screen device contacts the limit groove in the hinge structure. During the switching process between the folded state and the unfolded state of the folding screen mobile phone, the mechanical parts in the limit groove move left and right in the limit groove, thereby squeezing or releasing the squeeze on the mechanical switch to determine the opening and closing state. The mechanical parts inside the hinge will not be interfered by external electromagnetic signals, so this solution can improve the reliability and stability of the opening and closing state detection results.

[0073] See also Figure 8 , showing a schematic diagram of the principle structure of a folding screen device provided in an embodiment of the present application.

[0074] like Figure 8 As shown, the folding screen device may include a processor, an external memory interface, an internal memory, a USB interface, a charging management module, a power management module, a battery, a first antenna, a second antenna, a mobile communication module, a wireless communication module, an audio module, a speaker, a receiver, a microphone, a headphone interface, a sensor module, buttons, a motor, an indicator, a camera, a display, and a subscriber identification module (SIM) card interface, etc.

[0075] Among them, the sensor module may include a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, and the like.

[0076] It is understood that the structure illustrated in this embodiment does not constitute a specific limitation on the folding screen device. In other embodiments, the folding screen device may include more or fewer components than shown, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0077] The processor may include one or more processing units, for example, the processor may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0078] For example, in the present application, the processor can determine the opening and closing state of the folding screen device based on the level signal received by the opening and closing detection pin, such as the opening and closing state, the expandable state, and the folded state.

[0079] The display screen is used to display images, videos, etc. The display screen includes a display panel. In some embodiments, the folding screen device may include 1 or N display screens, where N is a positive integer greater than 1. The display panel of the foldable display screen in the folding screen device may use a flexible light-emitting diode (FLED). In addition, the folding screen device may also be provided with a non-flexible screen. For example, the surface where the flexible screen is located is the front of the folding screen device, and at least one non-flexible screen may be provided on the back of the folding screen device (i.e., the surface where the rear shell is located). The display panel of the non-flexible screen may use a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active matrix organic light-emitting diode or an active matrix organic light-emitting diode (AMOLED), Miniled, MicroLed, Micro-oled, a quantum dot light emitting diode (QLED), etc.

[0080] The external memory interface can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the folding screen device. The external memory card communicates with the processor through the external memory interface to realize the data storage function. For example, music, video and other files can be saved in the external memory card.

[0081] The internal memory can be used to store computer executable program codes, which include instructions. The processor executes various functional applications and data processing of the folding screen device by running the instructions stored in the internal memory. For example, in this embodiment, the processor can read the level signal of the opening and closing detection pin by executing the instructions stored in the internal memory, and further determine the opening and closing state of the folding screen mobile phone according to the level signal.

[0082] The internal memory may include a program storage area and a data storage area. The program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area may store data created during the use of the electronic device (such as audio data, a phone book, etc.), etc. In addition, the internal memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor executes various functional applications and data processing of the electronic device by running instructions stored in the internal memory and / or instructions stored in a memory provided in the processor.

[0083] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this embodiment is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the method described in each embodiment. The aforementioned storage medium includes: flash memory, mobile hard disk, read-only memory, random access memory, disk or optical disk, etc. Various media that can store program codes.

[0084] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A folding screen device, comprising: A first body, a second body, a hinge, a flexible screen and a processor, wherein the flexible screen is arranged on the first body and the second body; the hinge comprises a rotating shaft, and a first limiting component, a first door panel and a second door panel rotatably connected to the rotating shaft, the first body is fixed on the first door panel, the second body is fixed on the second door panel, and a first limiting groove for accommodating the first limiting component is arranged on the first door panel, and when the hinge is opened and closed, the first limiting component moves in the first limiting groove, characterized in that it also comprises: a mechanical switch and a detection circuit; The mechanical switch is arranged at a position where the first body contacts the first limiting groove, the mechanical switch is connected in series in the detection circuit, and the mechanical switch is a touch switch that conducts a small current when pressed; When the hinge switches from the unfolded state to the folded state, the first limiting component moves toward the mechanical switch until it squeezes the mechanical switch, so that the mechanical switch is closed and the detection circuit outputs a first electrical signal; When the hinge switches from the folded state to the unfolded state, the first limiting component moves away from the mechanical switch until the pressure on the mechanical switch is released, so that the mechanical switch is disconnected and the detection circuit outputs a second electrical signal, which is different from the first electrical signal; The opening and closing detection pin of the processor is connected to the output end of the detection circuit, and is used to determine the opening and closing state of the folding screen device based on the electrical signal output by the detection circuit.

2. The folding screen device according to claim 1, characterized in that: The second door panel is provided with a second limiting groove, and the second limiting groove is used to accommodate a second limiting component rotatably connected to the rotating shaft.

3. The folding screen device according to claim 1 or 2, characterized in that: The detection circuit includes a current limiting resistor, a first end of the current limiting resistor is connected to a power supply end, a second end of the current limiting resistor is connected to a first end of the mechanical switch, a second end of the mechanical switch is connected to a ground end, and a common connection end between the current limiting resistor and the mechanical switch is connected to an opening and closing detection pin of the processor.

4. The folding screen device according to claim 3, characterized in that: The mechanical switch is a four-pin trigger switch, wherein the first end and the third end of the four-pin trigger switch are connected to the second end of the current limiting resistor, and the second end and the fourth end of the four-pin trigger switch are connected to the ground end.

5. The folding screen device according to claim 3, characterized in that: The current-limiting resistor is a resistor network formed by connecting at least two resistors in series or in parallel, or a resistor network formed by connecting at least three resistors in series and in parallel.

6. The folding screen device according to claim 1, characterized in that: The first body includes a mainboard, the detection circuit is arranged on the mainboard, and the mechanical switch is connected to the detection circuit on the mainboard through a flexible circuit board.

7. The folding screen device according to claim 6, characterized in that: The second body includes a sub-board, and the flexible circuit board is used to connect the mechanical switch and the sub-board to the main board; The flexible circuit board includes a first branch, a second branch and a third branch. The first branch is electrically connected to the main board, the second branch is electrically connected to the mechanical switch, and the third branch is electrically connected to the sub-board in the folding screen device.

8. The folding screen device according to claim 7, characterized in that: The second branch of the flexible circuit board includes a first pin and a second pin, the first pin is connected to the third pin of the first branch, the second pin is connected to the fourth pin of the first branch, and the third pin and the fourth pin are used to connect the detection circuit.

9. The folding screen device according to claim 8, characterized in that: The first branch of the flexible circuit board is electrically connected to the main board through a first board-to-board connector, and the third branch is electrically connected to the sub-board through a second board-to-board connector.

10. An opening and closing detection device, applied to a folding screen device, the folding screen device comprising a hinge and a processor, the hinge comprising a rotating shaft and a first limiting component rotatably connected to the rotating shaft, when the hinge is opened and closed, the first limiting component moves in a first limiting groove, characterized in that: The opening and closing detection device comprises: a mechanical switch and a detection circuit; The mechanical switch is arranged at a position where the first body contacts the first limiting groove, the mechanical switch is connected in series in the detection circuit, and the mechanical switch is a touch switch that conducts a small current when pressed; During the process of the hinge switching from the unfolded state to the folded state, the first limiting component moves toward the mechanical switch until it squeezes the mechanical switch, so that the mechanical switch is closed, and the detection circuit outputs a first electrical signal and transmits it to the processor, so that the processor determines that the folding screen device is in the folded state according to the first electrical signal; During the process of the hinge switching from a folded state to an unfolded state, the first limiting component moves away from the mechanical switch until the pressure on the mechanical switch is released, so that the mechanical switch is disconnected, and the detection circuit outputs a second electrical signal and transmits it to the processor, so that the processor determines that the folding screen device is in the unfolded state based on the second electrical signal.

11. A method for detecting opening and closing, characterized in that: Applied to the folding screen device according to any one of claims 1 to 9, the method comprises: receiving an electrical signal output by the detection circuit; When the electrical signal is a low level signal, determining that the folding screen device is in a folded state; When the electrical signal is a high-level signal, it is determined that the folding screen device is in an unfolded state.

12. A chip system, characterized in that: include: at least one processor and an interface, the interface being used to receive code instructions and transmit them to the at least one processor; The at least one processor runs the code instructions to implement the opening and closing detection method according to claim 11.

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