CN114636369A - Angle detection device and folding equipment - Google Patents
Angle detection device and folding equipment Download PDFInfo
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- CN114636369A CN114636369A CN202210224201.4A CN202210224201A CN114636369A CN 114636369 A CN114636369 A CN 114636369A CN 202210224201 A CN202210224201 A CN 202210224201A CN 114636369 A CN114636369 A CN 114636369A
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- G—PHYSICS
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
Abstract
The application is suitable for the technical field of electronic products, and provides an angle detection device and folding equipment. The opening and closing angle of the folding equipment is adjusted through the rotating shaft unit comprising the first rotating shaft and the second rotating shaft, the capacitance value of the variable capacitance unit is obtained through the capacitance detection circuit, the opening and closing angle of the folding equipment is determined according to the corresponding relation between the capacitance value and the opening and closing angle, the opening and closing angle detection of the folding equipment by using a magnet is avoided, the anti-electromagnetic interference capability of the angle detection device is improved, the service life of the angle detection device is prolonged, and the accuracy of angle detection is improved; and through using the design of double hinge in angle detection device, can improve the angle scope that can open and shut of folding equipment in comparison with single pivot design, can also promote the closed effect of folding equipment when opening and the angle is 0 degree, avoid appearing the phenomenon of turning over firmly, promoted the folding effect of folding equipment and angle detection device's suitability when guaranteeing angle detection effect.
Description
Technical Field
The application belongs to the technical field of electronic products, especially relates to an angle detection device and folding equipment.
Background
Along with the rapid development of electronic equipment, folding equipment with folding screen is more and more, and the display screen size of folding equipment is adjusted according to user's actual need, has improved the flexibility of the display range of folding equipment. The folding equipment can also realize human-computer interaction according to the opening and closing angle, and the function needs to be capable of accurately detecting the opening and closing angle of the folding equipment.
At present, the opening and closing angle is usually detected by installing a Hall sensor and a magnet in folding equipment, when the opening and closing angle changes, the relative distance between the Hall sensor and the magnet changes, the magnetic field intensity and the magnetic field direction generated by the magnet and detected by the Hall sensor change, and therefore the corresponding opening and closing angle can be determined according to the detected magnetic field intensity and the detected magnetic field direction. The angle detection scheme has the defects that the angle detection scheme is easily subjected to electromagnetic interference and the magnet is easily demagnetized along with the lapse of time, so that the opening and closing angle of the folding equipment is not accurately detected.
Disclosure of Invention
In view of this, the embodiment of the present application provides an angle detection apparatus and a folding device, so as to solve the problem that the opening and closing angle detection of the folding device is inaccurate due to the defects that the existing angle detection scheme is easily subjected to electromagnetic interference and a magnet is easily demagnetized over time.
A first aspect of an embodiment of the present application provides an angle detection apparatus, which is applied to a folding device, and includes a rotating shaft unit, a variable capacitor unit, and a capacitor detection circuit;
the rotating shaft unit comprises a first rotating shaft and a second rotating shaft which are parallel to each other, and the first rotating shaft or the second rotating shaft can rotate to adjust the opening and closing angle of the folding equipment;
the variable capacitor unit comprises a first capacitor polar plate, a second capacitor polar plate and a dielectric layer arranged between the first capacitor polar plate and the second capacitor polar plate, wherein the first capacitor polar plate is connected to the first rotating shaft, and the second capacitor polar plate is connected to the second rotating shaft;
the capacitance detection circuit is used for acquiring the capacitance value of the variable capacitance unit and determining the opening and closing angle of the folding equipment according to the capacitance value of the variable capacitance unit and the corresponding relation between the capacitance value and the opening and closing angle.
In one embodiment, the first capacitor plate and the second capacitor plate are parallel to each other, the first capacitor plate is electrically connected to the first end of the capacitance detection circuit through a first electrode, and the second capacitor plate is electrically connected to the second end of the capacitance detection circuit through a second electrode.
In one embodiment, the projection area of the first capacitor plate mapped to the second capacitor plate is changed along with the opening and closing angle to change the capacitance value of the variable capacitor unit.
In one embodiment, the first capacitor plate is fixed to the first rotating shaft, and the second capacitor plate is fixed to the second rotating shaft, so that the first rotating shaft drives the first capacitor plate to rotate when rotating, and the second rotating shaft drives the second capacitor plate to rotate when rotating.
In one embodiment, the first capacitor plate and the second capacitor plate are fan-shaped, the first rotating shaft is fixed at the fan-shaped center of the first capacitor plate, and the second rotating shaft is fixed at the fan-shaped center of the second capacitor plate.
In one embodiment, when the first capacitor plate and the second capacitor plate are fan-shaped, the radius of the first capacitor plate and the radius of the second capacitor plate are smaller than the distance between the axis of the first rotating shaft and the axis of the second rotating shaft;
when the first capacitor plate and the second capacitor plate are fan-shaped and the opening and closing angle of the folding device is 0 degree, one edge of the first capacitor plate and one edge of the second capacitor plate are parallel to each other and perpendicular to a connecting line between the axis of the first rotating shaft and the axis of the second rotating shaft, and projection areas which are mapped with each other are arranged between the first capacitor plate and the second capacitor plate.
In one embodiment, the rotation angle ranges of the first rotating shaft and the second rotating shaft are both 0 degree to 90 degrees, so that the openable and closable angle range of the folding device is 0 degree to 180 degrees.
In one embodiment, the first and second shafts are synchronously rotatable in opposite directions.
According to the angle detection device provided by the first aspect of the embodiment of the application, the opening and closing angle of the folding equipment is adjusted through the rotating shaft unit comprising the first rotating shaft and the second rotating shaft, the capacitance value of the variable capacitance unit is obtained through the capacitance detection circuit, the opening and closing angle of the folding equipment is determined according to the capacitance value of the variable capacitance unit and the corresponding relation between the capacitance value and the opening and closing angle, the detection of the opening and closing angle by using a magnet in the folding equipment is avoided, the anti-electromagnetic interference capability of the angle detection device is improved, the service life of the angle detection device is prolonged, and therefore the accuracy of angle detection is improved; the number of elements mounted on the folding equipment is small, the structure is simple, the volume ratio is low, the operation stability of the angle detection device can be improved, the operation power consumption can be reduced, the space of the main board can be saved, the wiring flexibility of the main board can be improved, and the production cost of the folding equipment can be reduced; and through using the design of double hinge in angle detection device, can improve the angle detection device and use the angle scope that can open and shut when folding equipment in comparison with single pivot design, can also promote folding equipment's closed effect when opening and the angle undersize (for example 0 degree), avoid appearing the dead folding phenomenon and the limited condition of angle scope that can open and shut, promoted folding effect and angle detection device's suitability.
A second aspect of the embodiments of the present application provides a folding apparatus, including a folding screen unit and the angle detection device provided by the first aspect of the embodiments of the present application.
It is understood that the beneficial effects of the second aspect can be referred to the related description of the first aspect, and are not described herein again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a first structural schematic diagram of a terminal device provided in an embodiment of the present application;
fig. 2 is a schematic view of a first structure of an angle detection apparatus according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a second angle detection apparatus provided in the embodiment of the present application;
FIG. 4 is a schematic structural diagram of a third angle detection apparatus provided in the embodiment of the present application;
fig. 5 is a schematic front view of the first rotating shaft, the second rotating shaft, the first capacitor plate and the second capacitor plate provided in the embodiment of the present application when the opening angle is 0 degree;
fig. 6 is a schematic front view of a first rotating shaft, a second rotating shaft, a first capacitor plate and a second capacitor plate provided in the present embodiment when an opening and closing angle is 60 degrees;
fig. 7 is a schematic front view of a first rotating shaft, a second rotating shaft, a first capacitor plate and a second capacitor plate provided in the embodiment of the present application when an opening angle is 180 degrees;
fig. 8 is a right side view of the first rotating shaft, the second rotating shaft, the first capacitor plate and the second capacitor plate provided in the embodiment of the present application when the opening and closing angle is 0 degree;
fig. 9 is a schematic top view of the first rotating shaft, the second rotating shaft, the first capacitor plate and the second capacitor plate provided in the embodiment of the present application when the opening and closing angle is 0 degree;
fig. 10 is a schematic front view of the first capacitor plate and the second capacitor plate provided in the embodiment of the present application when the first rotating shaft, the second rotating shaft, the first capacitor plate and the second capacitor plate are in a fan shape and the opening and closing angle is 0 degree;
fig. 11 is a schematic front view of the first capacitor plate and the second capacitor plate provided in this embodiment of the present application when the first rotating shaft, the second rotating shaft, the first capacitor plate and the second capacitor plate are in a fan shape and the opening and closing angle is 90 degrees;
fig. 12 is a schematic front view of the first capacitor plate and the second capacitor plate provided in this embodiment of the present application when the first rotating shaft, the second rotating shaft, the first capacitor plate and the second capacitor plate are in a fan shape, and the opening and closing angle is 180 degrees;
FIG. 13 is a first structural schematic diagram of a folding apparatus provided in an embodiment of the present application;
FIG. 14 is a schematic diagram of a second structure of a folding apparatus provided in the embodiments of the present application;
fig. 15 is a schematic flowchart of a first angle detection method according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather mean "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
In application, at present, a hall sensor and a magnet are generally installed in a folding device to detect an opening and closing angle, when the opening and closing angle changes, a relative distance between the hall sensor and the magnet changes, so that the magnetic field intensity and the magnetic field direction generated by the magnet detected by the hall sensor change, and a corresponding opening and closing angle can be determined according to the detected magnetic field intensity and the detected magnetic field direction. The angle detection scheme has the defects that the angle detection scheme is easily affected by electromagnetic interference and the magnet is easily demagnetized along with the lapse of time, so that the opening and closing angle of the folding equipment is not accurately detected.
In addition, present angle detection device adopts the design of single pivot usually, and the angle scope of can opening and shutting that leads to angle detection device to use when folding equipment is limited, and folding equipment's the angle of opening and shutting is difficult to reach 0 degree or make pivot or folding screen appear dead book (owing to fold for a long time or too big pressure the crease of the sign of about to breaking appear) phenomenon when reaching 0 degree, and folding effect is poor, leads to angle detection device's suitability poor.
In view of the above technical problems, an embodiment of the present application provides an angle detection apparatus, which adjusts an opening and closing angle of a folding device through a rotating shaft unit including a first rotating shaft and a second rotating shaft, acquires a capacitance value of a variable capacitance unit through a capacitance detection circuit, and determines the opening and closing angle of the folding device according to the capacitance value of the variable capacitance unit and a corresponding relationship between the capacitance value and the opening and closing angle, so as to avoid using a magnet in the folding device to detect the opening and closing angle, improve the anti-electromagnetic interference capability and the service life of the angle detection apparatus, and thereby improve the accuracy of angle detection; the number of elements mounted on the folding equipment is small, the structure is simple, the volume ratio is low, the operation stability of the angle detection device can be improved, the operation power consumption can be reduced, the space of the main board can be saved, the wiring flexibility of the main board can be improved, and the production cost of the folding equipment can be reduced; and through using the design of double hinge in angle detection device, can improve the angle detection device and use the angle scope that can open and shut when folding equipment in comparison with single pivot design, can also promote folding equipment's closed effect when opening and the angle undersize (for example 0 degree), avoid appearing the dead folding phenomenon and the limited condition of angle scope that can open and shut, promoted folding effect and angle detection device's suitability.
The angle detection device provided by the embodiment of the application can be applied to terminal equipment with a folding function, for example, folding equipment provided with a folding screen unit. The terminal device may be a mobile phone, a tablet computer, a wearable device, an in-vehicle device, an Augmented Reality (AR)/Virtual Reality (VR) device, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), and the like, and the specific type of the terminal device is not limited in this embodiment.
Fig. 1 is a schematic diagram illustrating a structure of a terminal device 1, and the terminal device 1 may include a processing module 10, a memory 20, a power module 30, an audio module 40, a camera module 50, a sensor module 60, an input module 70, a display module 80, a wireless communication module 90, and the like. The audio module 40 may include a speaker 41, a microphone 42, and the like, the camera module 50 may include a short-focus camera 51, a long-focus camera 52, a flash 53, and the like, the sensor module 60 may include an infrared sensor 61, an acceleration sensor 62, a position sensor 63, a fingerprint sensor 64, an iris sensor 65, and the like, the input module 70 may include a touch panel 71, an external input unit 72, and the like, and the Wireless Communication module 90 may include a Wireless Communication unit such as bluetooth, ZigBee, Optical Wireless Communication (Optical Wireless), Wireless Local Area Network (WLAN), Near Field Communication (NFC), and the like.
In application, the display module 80 may be a straight screen, a curved screen, or a flexible screen, and specifically may be a foldable screen, and the foldable screen may include at least one flexible screen, or the foldable screen may include at least one flexible screen and at least one straight screen or curved screen, and the embodiment of the present application does not set any limitation to the specific type of the display module 80.
In Application, the Processing module 10 may be a Central Processing Unit (CPU), and the Processing module may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
In application, the storage 20 may be an internal storage unit of the terminal device in some embodiments, for example, a hard disk or a memory of the terminal device. The memory 20 may also be an external storage device of the terminal device in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the terminal device. Further, the memory 20 may also include both an internal storage unit of the terminal device and an external storage device. The memory 20 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of a computer program. The memory 20 may also be used to temporarily store data that has been output or is to be output.
As shown in fig. 2, the angle detecting apparatus 100 provided in the embodiment of the present application, applied to a folding device 200, includes a rotating shaft unit 110, a variable capacitance unit 120 and a capacitance detecting circuit 130, wherein the variable capacitance unit 120 is respectively connected to the rotating shaft unit 110 and the capacitance detecting circuit 130;
the rotation shaft unit 110 is used to adjust the opening and closing angle of the folding device 200;
the capacitance value of the variable capacitance unit 120 changes along with the opening and closing angle;
the capacitance detection circuit 130 is configured to obtain a capacitance value of the variable capacitance unit 120, and determine an opening and closing angle of the folding apparatus 200 according to the capacitance value of the variable capacitance unit 120 and a corresponding relationship between the capacitance value and the opening and closing angle.
In application, the angle detection device 100 may be embedded in the folding apparatus 200, and the angle detection device 100 may be used to adjust the opening and closing angle of the folding apparatus 200 and accurately detect the opening and closing angle in real time, and the specific structure and implementation manner of the angle detection device 100 will be described below.
In an application, the angle detecting apparatus 100 may include a rotating shaft unit 110, a variable capacitor unit 120, and a capacitor detecting circuit 130. The rotating shaft unit 110 may include at least one rotating shaft, each rotating shaft may be connected to one or more foldable screens, and specifically, the rotating shaft unit 110 may include one rotating shaft, and the one rotating shaft may be connected to two foldable screens; alternatively, the hinge unit 110 may include two hinges, each of which is connected to one of the folding screens. The material of the rotating shaft can be metal, and specifically can be different types of metal such as stainless steel or alloy; the configuration of the rotating shaft may be a hinge. The number of the rotating shafts, the material of the rotating shafts, and the structure of the rotating shafts included in the rotating shaft unit 110 are not limited in the embodiment of the present application.
In application, the rotating shaft unit 110 may change the opening and closing angle of the folding device 200 according to the torque applied from the outside, and the specific opening and closing angle is determined according to the specific torque magnitude and torque direction applied by the rotating shaft unit 110.
In application, the Variable Capacitor (Variable Capacitor) unit 120 may include at least one set of moving plates, and may also include at least one set of moving plates and at least one set of stator plates. Wherein, a group of fixed and unchangeable pole pieces is called a group of fixed pieces, and a group of movable pole pieces is called a group of movable pieces. The number of the moving plates and the number of the fixed plates included in the variable capacitance unit 120 are not limited in this embodiment.
In application, the capacitance value of the variable capacitance unit 120 can change along with the rotation angle of the moving plate, specifically, the moving plate can be connected with the rotating shaft unit 110, so that the moving plate can rotate according to the rotation of the rotating shaft unit 110, and thus the moving plate can rotate along with the change of the opening and closing angle, and further the capacitance value of the variable capacitance unit 120 can change along with the change of the opening and closing angle; variable capacitor unit 120 can also include drive mechanism, and drive mechanism is connected with rotor plate and pivot unit 110 respectively, makes drive mechanism can rotate according to pivot unit 110's rotation, and drive mechanism drives the rotor plate and rotates to make the rotor plate can follow the angle change that opens and shuts and rotate, and then make variable unit's capacitance value follow the angle change that opens and shuts.
In one embodiment, each opening and closing angle has a unique corresponding capacitance value.
In application, each numerical value of the opening and closing angle has a unique corresponding rotor plate rotating angle, and each rotor plate rotating angle has a unique corresponding capacitance value, so that each numerical value of the opening and closing angle has a unique corresponding capacitance value.
In application, the capacitance detection circuit 130 is connected to the variable capacitance unit 120, and can be used to obtain the capacitance value of the variable capacitance unit 120 in real time, and the value of each opening/closing angle has a unique corresponding capacitance value, so that the opening/closing angle of the folding device 200 can be accurately determined according to the capacitance value of the variable capacitance unit 120 and the corresponding relationship between the capacitance value and the opening/closing angle. The capacitance detection circuit 130 may obtain the capacitance value of the variable capacitance unit 120 through a circuit that can be used for detecting the capacitance value, such as a differential pulse modulation circuit or a capacitance frequency modulation circuit, and may accurately determine the opening and closing angle of the folding device 200 according to the capacitance value of the variable capacitance unit 120 and the corresponding relationship between the capacitance value and the opening and closing angle through an integrated processor.
In application, the rotating shaft unit is used for adjusting the opening and closing angle of the folding equipment; the capacitance value of the variable capacitance unit is changed along with the opening and closing angle; the capacitance detection circuit is used for acquiring the capacitance value of the variable capacitance unit, determining the opening and closing angle of the folding equipment according to the capacitance value of the variable capacitance unit and the corresponding relation between the capacitance value and the opening and closing angle, so that the detection of the opening and closing angle by using a magnet in the folding equipment is avoided, the anti-electromagnetic interference capability of the angle detection device is improved, the service life of the angle detection device is prolonged, and the accuracy of angle detection is improved; and the number of elements mounted to the folding equipment is small, the structure is simple, the volume ratio is low, the operation power consumption can be reduced while the operation stability of the angle detection device is improved, the space of the main board can be saved so as to improve the wiring flexibility of the main board, and the production cost of the folding equipment is reduced.
As shown in fig. 3, based on the corresponding embodiment of fig. 2, in an embodiment, the variable capacitance unit 120 includes a first capacitance plate 121, a second capacitance plate 122, and a dielectric layer 123 disposed between the first capacitance plate 121 and the second capacitance plate 122 (fig. 3 exemplarily shows a three-dimensional diagram of the variable capacitance unit 120, and the first capacitance plate 121 is completely mapped to the second capacitance plate 122);
in one embodiment, the first capacitor plate 121 and the second capacitor plate 122 are parallel to each other, the first capacitor plate 121 is connected to a first end of the capacitance detection circuit 130 through a first electrode, the second capacitor plate 122 is connected to a second end of the capacitance detection circuit 130 through a second electrode, and the first capacitor plate 121 and the second capacitor plate are respectively connected to the rotating shaft unit 110.
In an application, the variable capacitance unit 120 may include a set of moving plates, and specifically includes a first capacitance plate 121 and a second capacitance plate 122, where the first capacitance plate 121 and the second capacitance plate 122 may be made of a Conductive Material (Conductive Material), specifically, a metal Conductive Material and a non-metal Conductive Material, the metal Conductive Material may be silver, copper, aluminum, tungsten, nickel, or an alloy, and the non-metal Conductive Material may be Conductive plastic or Conductive rubber. The embodiment of the present application does not limit the specific material of the first capacitor plate 121 and the second capacitor plate 122.
In application, the first capacitor plate 121 and the second capacitor plate 122 are parallel to each other and spaced apart by a predetermined distance, the first capacitor plate 121 is provided with a first electrode, the second capacitor plate 122 is provided with a second electrode, the first capacitor plate 121 is connected to the first end of the capacitor detection circuit 130 through the first electrode, and the second capacitor plate 122 is connected to the second end of the capacitor detection circuit 130 through the second electrode.
In one embodiment, dielectric layer 123 is used as a dielectric between first capacitor plate 121 and second capacitor plate 122;
the projection area of the first capacitor plate 121 mapped to the second capacitor plate 122 changes along with the opening and closing angle, so as to change the capacitance of the variable capacitor unit 120.
In application, a Dielectric layer 123 is disposed between the first capacitor plate 121 and the second capacitor plate 122 to serve as a Dielectric (Dielectric) between the first capacitor plate 121 and the second capacitor plate 122 to conduct or store charged particles between the first capacitor plate 121 and the second capacitor plate 122. The dielectric layer 123 may be a layer of gaseous dielectric 123, a layer of liquid dielectric 123, or a layer of solid dielectric 123.
In application, the projection area of the first capacitor plate 121 mapped to the second capacitor plate 122 changes along with the opening and closing angle to change the capacitance of the variable capacitor unit 120, and the relationship between the opening and closing angle, the projection area and the capacitance will be described in detail as follows:
specifically, the relationship between the projection area and the capacitance value is as follows:
C＝ε0εrS/d；
wherein C represents the capacitance value of the variable capacitance unit, ε0Denotes the vacuum dielectric constant,. epsilonrThe relative dielectric constant of the dielectric layer is represented, S represents the projection area of the first capacitor plate mapped to the second capacitor plate, and d represents the preset distance between the first capacitor plate and the second capacitor plate.
In application,. epsilon0Is constant, and epsilon is caused by determining the material used by the dielectric layer and arranging the first capacitor plate and the second capacitor plate in parallel and at a preset distance drAnd d is also normalTherefore, according to the relational expression between the projection area and the capacitance value, the positive correlation between the capacitance value and the projection area can be obtained, and the larger the projection area is, the larger the capacitance value is.
In application, according to different relative positions of the first capacitor plate 121 and the second capacitor plate 122, the projection area may be larger as the opening and closing angle is larger, or the projection area may be smaller as the opening and closing angle is larger. When the opening and closing angle is larger and the projection area is larger, the opening and closing angle is larger and the capacitance value is larger; when the opening and closing angle is larger and the projection area is smaller, the opening and closing angle is larger and the capacitance value is smaller. Therefore, each opening and closing angle value can have a unique corresponding projected area, and each projected area value can have a unique corresponding capacitance value, so that each opening and closing angle value can have a unique corresponding capacitance value.
In one embodiment, the angle detection apparatus 100 further includes amplifier circuits connected to the variable capacitance unit 120 and the capacitance detection circuit 130, respectively;
the amplifier circuit is used to amplify the capacitance value of the variable capacitance unit 120 to improve the capacitance detection accuracy of the capacitance detection circuit 130.
In application, the capacitance value of the variable capacitance unit 120 composed of the first capacitance plate 121, the second capacitance plate 122 and the dielectric layer 123 is small, and the capacitance value of the variable capacitance unit 120 can be amplified by arranging an amplifier circuit between the capacitance detection circuit 130 and the variable capacitance unit 120, so that the capacitance detection accuracy of the capacitance detection circuit 130 can be improved.
In application, in the conventional angle detecting apparatus 100, two or more than two folding screens are usually used as capacitor plates, and the distance sensors are used to detect the distances between the plurality of capacitor plates in real time, and the projection areas between the plurality of capacitor plates need to be measured in real time to calculate the capacitance values between the plurality of capacitor plates. And through setting up first capacitor plate 121 and second capacitor plate 122 parallel to each other and the interval default distance, make the capacitance value of variable cell follow projection area and change, the capacitance value that can the variable cell follows the angle of opening and shutting and changes, do not receive the distance influence between first capacitor plate 121 and the second capacitor plate 122, can be accurate, conveniently acquire the capacitance value of variable capacitor unit 120 through electric capacity detection circuitry 130, need not use distance sensor, the accuracy and the efficiency of angle detection have been improved, and the manufacturing cost of folding equipment 200 has been reduced.
As shown in fig. 4 to 9, based on the embodiment corresponding to fig. 3, in one embodiment, the rotating shaft unit 110 includes a first rotating shaft 111 and a second rotating shaft 112 parallel to each other, and the first rotating shaft 111 or the second rotating shaft 112 can rotate for adjusting the opening and closing angle of the folding device 200;
the first capacitor plate 121 is connected to the first rotating shaft 111, and the second capacitor plate is connected to the second rotating shaft 112.
It should be noted that fig. 5 to 7 exemplarily show front views of the first rotating shaft 111, the second rotating shaft 121, the first capacitor plate 121, and the second capacitor plate 122 at opening and closing angles of 0 degree, 60 degrees, and 180 degrees, and fig. 8 and 9 exemplarily show right and top views of the first rotating shaft 111, the second rotating shaft 121, the first capacitor plate 121, and the second capacitor plate 122 at an opening and closing angle of 0 degree. Wherein S represents a projection area of the first capacitor plate mapped to the second capacitor plate; the dielectric layer 123 is spaced from the first and second capacitor plates 121 and 122 in fig. 8 and 9 by way of example, and the dielectric layer 123 is usually in contact with the first and second capacitor plates 121 and 122 in order to achieve better conductive effect in practical products.
In application, the rotating shaft unit 110 may include a first rotating shaft 111 and a second rotating shaft 121, the first rotating shaft 111 and the second rotating shaft 121 are fixed in the folding apparatus 200, and the positions of the first rotating shaft 111 and the second rotating shaft 121 are not changed during the rotating process, and the first rotating shaft 111 is connected to the first capacitor plate 121, specifically, the first capacitor plate 121 may be fixed to or sleeved on the first rotating shaft 111; first pivot 111 is used for adjusting folding equipment 200's the angle that opens and shuts, and specifically, first pivot 111 drives folding screen of folding equipment 200 and rotates when rotating, drives first capacitor plate 121 simultaneously and rotates. The positional relationship between the second rotating shaft 121 and the second capacitor plate 122 and the function of the second rotating shaft 121 can refer to the above description of the first rotating shaft 111, and are not described herein again.
In one embodiment, the first and second shafts 111, 112 can rotate synchronously in opposite directions.
In application, the first rotating shaft 111 and the second rotating shaft 112 can rotate synchronously in opposite directions, can rotate synchronously in the same direction, and can also rotate independently in a clockwise reverse direction or a counterclockwise direction.
In application, the double-rotating-shaft design is used in the angle detection device 100, compared with the single-rotating-shaft design, the opening and closing angle range of the angle detection device 100 applied to the folding equipment can be increased, the closing effect of the folding equipment can be improved when the opening and closing angle is 0 degree, the situation that the folding equipment is difficult to close to 0 degree under the single-rotating-shaft design and the opening and closing angle range is limited is avoided, and the reliability of the folding effect and the folding function is improved; the first capacitor plate is connected with the first rotating shaft, the second capacitor plate is connected with the second rotating shaft, the first capacitor plate, the second capacitor plate and the dielectric layer can form a variable capacitor unit in a smaller area, the first capacitor plate and the second capacitor plate do not need to be installed in a folding screen of folding equipment, the space of a main board is saved, and the production cost of the folding equipment is reduced.
As shown in fig. 10 to 12, based on the embodiments corresponding to fig. 5 to 7, in one embodiment, the first capacitor plate 121 and the second capacitor plate 122 are fan-shaped, the first rotating shaft 111 is fixed at the center of the fan-shaped circle of the first capacitor plate 121, and the second rotating shaft 112 is fixed at the center of the fan-shaped circle of the second capacitor plate 122.
It should be noted that fig. 10 to 12 exemplarily show front views of the first rotating shaft 111, the second rotating shaft 112, the first capacitor plate 121, and the second capacitor plate 122 when the opening and closing angles are 0 degree, 90 degrees, and 180 degrees, wherein a projection area of the first capacitor plate 121 mapped to the second capacitor plate 122 is an intersection area of the first capacitor plate 121 and the second capacitor plate 122.
In application, the shapes of the first capacitor plate 121 and the second capacitor plate 122 may be set according to actual needs, and specifically may be set according to an openable and closable angle range of the folding apparatus 200, for example, when the openable and closable angle range of the folding apparatus 200 is 0 degree to 90 degrees, the shapes of the first capacitor plate 121 and the second capacitor plate 122 may be a quarter circle; when the openable and closable angle range of the folding device 200 is 0 to 180 degrees, the shapes of the first and second capacitor plates 121 and 122 may be fan-shaped between a quarter circle and a half circle (as shown in fig. 8 to 12); when the openable and closable angle range of the folding device 200 is 180 to 270 degrees, the shapes of the first and second capacitor plates 121 and 122 may be semi-circles or sectors between semi-circles and circles. Generally, the larger the openable angle range, the larger the areas of the first and second capacitor plates 121 and 122.
In one embodiment, when the first and second capacitor plates 121 and 122 are fan-shaped, the radius of the first and second capacitor plates 121 and 122 is smaller than the distance between the axes of the first and second rotating shafts 111 and 112;
when the first capacitor plate 121 and the second capacitor plate 122 are fan-shaped and the opening and closing angle of the folding device 200 is 0 degree, one side of the first capacitor plate 121 and one side of the second capacitor plate 122 are parallel to each other and perpendicular to a connection line between the axis of the first rotating shaft 111 and the axis of the second rotating shaft 112, and projection areas mapped to each other are formed between the first capacitor plate 121 and the second capacitor plate 122.
In application, after the shapes of the first capacitor plate 121 and the second capacitor plate 122 are determined, the sizes of the first capacitor plate 121 and the second capacitor plate 122 can be set according to actual needs, so that the first capacitor plate 121 and the second capacitor plate 122 have unique corresponding projection areas at different opening and closing angles. For example, when the first and second capacitor plates 121 and 122 are fan-shaped, the radius of the first and second capacitor plates 121 and 122 is smaller than the distance between the axial centers of the first and second rotating shafts 111 and 112 and larger than half the distance between the axial centers of the first and second rotating shafts 111 and 112. It should be noted that, when the first capacitor plate 121 and the second capacitor plate 122 have a projected area that is mapped to each other, the radius is larger than a half distance between the axis of the first rotating shaft 111 and the axis of the second rotating shaft 112.
In application, after the shapes and sizes of the first capacitor plate 121 and the second capacitor plate 122 are determined, the relative positions of the first capacitor plate 121 and the second capacitor plate 122 at different opening and closing angles can be set according to actual needs, and specifically, the relative positions of the first capacitor plate 121 and the second capacitor plate 122 at different opening and closing angles can be set according to the opening and closing angle range, so that the variable capacitor unit 120 has a unique corresponding capacitance value at any opening and closing angle. Specifically, when the first and second capacitor plates 121 and 122 are shaped like a sector as shown in fig. 10 to 12 (the central angle is 135 degrees), assuming that the preset opening and closing angle of the folding apparatus 200 is 0 degree, the preset relative positions of the first and second capacitor plates 121 and 122 are set at the preset opening and closing angle: one side of the first capacitor plate 121 and one side of the second capacitor plate 122 are parallel to each other and perpendicular to a connection line between the axis of the first rotating shaft 111 and the axis of the second rotating shaft 112, and a projection area is formed between the first capacitor plate 121 and the second capacitor plate 122. First pivot 111 drives folding screen and first capacitor plate 121 simultaneously and rotates when rotating, and second pivot 112 drives folding screen and second capacitor plate 122 simultaneously and rotates when rotating, consequently after the predetermined relative position of first capacitor plate 121 and second capacitor plate 122 under the predetermined angle that opens and shuts that sets up folding equipment 200, the relative position of first capacitor plate 121 and second capacitor plate 122 under arbitrary angle that opens and shuts all can be calculated according to the difference of the above-mentioned arbitrary angle that opens and shuts and the predetermined angle that opens and shuts. The embodiment of the present application does not limit the size of the first capacitor plate 121 and the second capacitor plate 122 and the relative position of the first capacitor plate and the second capacitor plate at different opening and closing angles.
In one embodiment, the rotation angle ranges of the first rotating shaft 111 and the second rotating shaft 112 are both 0 degree to 90 degrees, so that the openable and closable angle range of the folding apparatus 200 is 0 degree to 180 degrees.
In application, the projection areas and the maximum projection areas of the first capacitor plate 121 and the second capacitor plate 122 at different opening angles may be determined according to the shapes, sizes and preset relative positions of the first capacitor plate 121 and the second capacitor plate 122. After the maximum projection area is exceeded, it cannot be satisfied that each numerical value of the projection area has a unique corresponding capacitance value, and the rotation angle ranges of the first rotating shaft 111 and the second rotating shaft 112 can be obtained according to the maximum projection area, so that the openable and closable angle range of the folding device 200 can be obtained. When the first capacitor plate 121 and the second capacitor plate 122 have the same shape and size and are symmetrical with respect to a perpendicular bisector of a connecting line between the axis of the first rotating shaft 111 and the axis of the second rotating shaft 112, the ranges of the rotation angles of the first rotating shaft 111 and the second rotating shaft 112 are equal, and otherwise, the ranges are not equal.
In application, when the first capacitor plate 121 and the second capacitor plate 122 are shaped like sectors as shown in fig. 10 to 12, the rotation angle ranges of the first rotating shaft 111 and the second rotating shaft 112 are both 0 degree to 90 degrees, so that the openable and closable angle range of the folding apparatus 200 is 0 degree to 180 degrees, and the embodiment of the present application does not set any limit to the rotation angle ranges of the first rotating shaft 111 and the second rotating shaft 112 and the openable and closable angle range of the folding apparatus 200.
As shown in fig. 13, a folding device 200 provided in the embodiment of the present application includes a folding screen unit 210 and an angle detection apparatus 100 provided in the above embodiment;
in one embodiment, as shown in fig. 14, the folding screen unit 210 includes a first folding screen 211 connected to the first rotating shaft 111 and a second folding screen 212 connected to the second rotating shaft 112;
the first rotating shaft 111 is used for driving the first folding screen 211 to rotate when rotating;
the second rotating shaft 112 is used for driving the second folding screen 212 to rotate when rotating.
In application, the structure and function of the angle detection apparatus 100 and the selection of the folding screen unit 210 can refer to the description of the above embodiments, and are not described herein again.
It is to be understood that the illustrated structure of the embodiment of the present application does not constitute a specific limitation to the angle detecting apparatus 100 and the folding device 200. In other embodiments of the present application, the angle detection apparatus 100 and the folding device 200 may include more or less components than those shown, or combine some components, or different components, for example, may further include an input/output device, a network access device, and the like. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
As shown in fig. 15, the present embodiment provides an angle detection method, which is applied to the folding apparatus provided in the above embodiments, and includes the following steps S1501 to S1502:
step S1501, acquiring a capacitance value of a variable capacitance unit through a capacitance detection circuit, wherein the capacitance value of the variable capacitance unit changes along with the opening and closing angle of the folding device;
step S1502, determining an opening and closing angle of the folding device by the capacitance detection circuit according to the capacitance value of the variable capacitance unit and the corresponding relationship between the capacitance value and the opening and closing angle.
In application, the functions implemented by the capacitance detection circuit in step S1501 and step S1502 can refer to the description of the above embodiments, and are not described herein again.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program can implement the steps in the above-mentioned angle detection method embodiments.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed terminal device and method may be implemented in other ways. For example, the above-described terminal device embodiments are merely illustrative, and for example, the division of the modules is only one logical functional division, and there may be other divisions when actually implementing, for example, a plurality of modules or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. An angle detection device is applied to folding equipment and is characterized by comprising a rotating shaft unit, a variable capacitor unit and a capacitor detection circuit;
the rotating shaft unit comprises a first rotating shaft and a second rotating shaft which are parallel to each other, and the first rotating shaft or the second rotating shaft can rotate to adjust the opening and closing angle of the folding equipment;
the variable capacitor unit comprises a first capacitor polar plate, a second capacitor polar plate and a dielectric layer arranged between the first capacitor polar plate and the second capacitor polar plate, the first capacitor polar plate is connected to the first rotating shaft, and the second capacitor polar plate is connected to the second rotating shaft;
the capacitance detection circuit is used for acquiring the capacitance value of the variable capacitance unit and determining the opening and closing angle of the folding equipment according to the capacitance value of the variable capacitance unit and the corresponding relation between the capacitance value and the opening and closing angle.
2. The angle sensing device of claim 1, wherein the first capacitive plate and the second capacitive plate are parallel to each other, the first capacitive plate being electrically connected to the first end of the capacitive sensing circuit via a first electrode, and the second capacitive plate being electrically connected to the second end of the capacitive sensing circuit via a second electrode.
3. The angle detection device of claim 2, wherein a projected area of the first capacitor plate mapped to the second capacitor plate changes with the opening and closing angle to change a capacitance value of the variable capacitor unit.
4. The angle sensing device of claim 1, wherein the first capacitive plate is fixed to the first rotating shaft and the second capacitive plate is fixed to the second rotating shaft such that the first rotating shaft, when rotated, drives the first capacitive plate to rotate and the second rotating shaft, when rotated, drives the second capacitive plate to rotate.
5. The angle sensing device of claim 4, wherein the first capacitive plate and the second capacitive plate are shaped as sectors, the first shaft is fixed to a sector center of the first capacitive plate, and the second shaft is fixed to a sector center of the second capacitive plate.
6. The angle detecting apparatus of claim 5, wherein when the first and second capacitor plates are fan-shaped, a radius of the first and second capacitor plates is smaller than a distance between an axis of the first rotating shaft and an axis of the second rotating shaft;
when the first capacitor plate and the second capacitor plate are fan-shaped and the opening and closing angle of the folding device is 0 degree, one edge of the first capacitor plate and one edge of the second capacitor plate are parallel to each other and perpendicular to a connecting line between the axis of the first rotating shaft and the axis of the second rotating shaft, and projection areas which are mapped with each other are arranged between the first capacitor plate and the second capacitor plate.
7. The angle detecting device according to claim 5, wherein the rotation angle ranges of the first rotating shaft and the second rotating shaft are both 0 degree to 90 degrees, so that the openable and closable angle range of the folding apparatus is 0 degree to 180 degrees.
8. The angle detecting device according to any one of claims 1 to 7, wherein the first rotating shaft and the second rotating shaft are capable of synchronously rotating in opposite directions.
9. A folding apparatus comprising a folding screen unit and an angle detection device as claimed in any one of claims 1 to 8.
10. The folding apparatus of claim 9, wherein said folding screen unit includes a first folding screen coupled to said first rotating shaft and a second folding screen coupled to said second rotating shaft;
the first rotating shaft is used for driving the first folding screen to rotate when rotating, and the second rotating shaft is used for driving the second folding screen to rotate when rotating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210224201.4A CN114636369A (en) | 2022-03-07 | 2022-03-07 | Angle detection device and folding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210224201.4A CN114636369A (en) | 2022-03-07 | 2022-03-07 | Angle detection device and folding equipment |
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| CN114636369A true CN114636369A (en) | 2022-06-17 |
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| CN202210224201.4A Withdrawn CN114636369A (en) | 2022-03-07 | 2022-03-07 | Angle detection device and folding equipment |
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| CN115325930A (en) * | 2022-08-09 | 2022-11-11 | Oppo广东移动通信有限公司 | Angle detection device and folding equipment |
| CN116033270A (en) * | 2023-03-23 | 2023-04-28 | 基合半导体（宁波）有限公司 | Rotation detection assembly, camera module and electronic equipment |
| CN117329965A (en) * | 2023-12-01 | 2024-01-02 | 珠海格力电器股份有限公司 | Angle detection device |
| WO2024082587A1 (en) * | 2022-10-17 | 2024-04-25 | 基合半导体（宁波）有限公司 | Apparatus and method for measuring angle of rotation of shaft and electronic device |
| CN115325930B (en) * | 2022-08-09 | 2024-05-17 | Oppo广东移动通信有限公司 | Angle detecting device and folding apparatus |
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