CN114675711A - Foldable electronic equipment and folding angle detection method - Google Patents
Foldable electronic equipment and folding angle detection method Download PDFInfo
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Abstract
The application discloses a foldable electronic device and a folding angle detection method, and belongs to the technical field of folding screens. The electronic equipment comprises a bending part and an angle detection device, the electronic equipment can be switched between a folded state and an unfolded state, and the angle detection device comprises a first bearing body, a second bearing body, a transmitting unit, a detection circuit and a receiving unit; the first bearing body and the second bearing body are arranged on the bending part and are stacked in the thickness direction of the bending part; the detection circuit comprises a first detection part and a second detection part, the first detection part is arranged on the first bearing body, and the second detection part is arranged on the second bearing body; the transmitting unit transmits a first electric signal to the detecting circuit, the receiving unit receives a second electric signal from the detecting circuit, a first distance between the first detecting portion and the second detecting portion changes in the process of switching the electronic device between the folded state and the unfolded state, and the electronic device determines the folding angle according to the first electric signal and the second electric signal.
Description
Technical Field
The application belongs to the technical field of folding screens, and particularly relates to a foldable electronic device and a folding angle detection method.
Background
At present, the folding screen is gradually increased in intelligent terminal market application, and the angle of opening and shutting of folding screen is influencing user's actual experience, therefore folding angle detects to be a main point of folding screen terminal design. At present, common detection method is generally for increasing extra sensor like magnetic induction device, photoinduction device etc. for obtaining the angle of opening and shutting of folding screen equipment, but adopt such detection method to need additionally to introduce the hardware, thereby increase the hardware cost, and occupied the inside limited space of cell-phone, in addition, use magnetic induction device, photoinduction device etc. detects the time-measuring, receive the light signal in the external environment easily, the influence of magnetic signal etc., and can receive the light signal of reflection, the magnetic signal influence, the interference killing feature is poor, in addition, in user's in-service use process, because the hand touches or shelters from induction device under the handheld state, also lead to the erroneous judgement of folding screen angle of buckling, influence user experience.
Disclosure of Invention
The embodiment of the application aims to provide a foldable electronic device and a folding angle detection method, and the problems that in the prior art, the angle detection of a folding screen needs to introduce an additional sensing device, so that the hardware cost is increased, the limited space in the device is occupied, and the detection precision is easily interfered by external factors can be solved.
In a first aspect, an embodiment of the present application provides a foldable electronic device, which includes a bending portion a and an angle detection device, where the electronic device is switchable between a folded state and an unfolded state, and the angle detection device includes a first carrier, a second carrier, a transmitting unit, a detection circuit, and a receiving unit;
the first bearing body and the second bearing body are arranged at the bent part, and the first bearing body and the second bearing body are stacked in the thickness direction of the bent part;
the detection circuit comprises a first detection part and a second detection part, the first detection part is arranged on the first bearing body, and the second detection part is arranged on the second bearing body;
the emitting unit to detection circuitry sends first signal of telecommunication, receiving element with detection circuitry electric connection, receiving element follows the signal that detection circuitry received is the second signal of telecommunication, electronic equipment is at the in-process that switches between fold condition and expansion state, first detection part with first interval between the second detection part changes, makes detection circuitry's total impedance changes, electronic equipment basis first signal of telecommunication with the second signal of telecommunication confirms the first interval of folding angle of electronic equipment.
Optionally, the electronic device includes a first portion and a second portion that can rotate relatively, the first portion is connected with the second portion through the bending portion, the first carrier and the second carrier are both flexible circuit boards, and two ends of the first carrier and the second carrier are respectively connected with the first portion and the second portion.
Optionally, when the electronic device is in a flattened state, the lengths of the first carrier and the second carrier in a first direction are the same, and the first direction is an extending direction of a side edge of the bending portion connecting the first portion and the second portion.
Optionally, the electronic device includes a first portion and a second portion that are relatively rotatable, the first detecting portion is a first transmission line, the second detecting portion is a second transmission line, the first transmission line and the second transmission line are coupled, the first transmission line and the second transmission line are both extended along a second direction, and when the electronic device is in a flattened state, an included angle between the second direction and an extending direction of a side edge of the bending portion, where the side edge connects the first portion and the second portion, is greater than 45 °;
in the process of switching the electronic device between the folded state and the unfolded state, the first distance between the first detection part and the second detection part is changed, so that the total impedance of the detection circuit is changed, and the second electric signal received by the receiving unit from the detection circuit is changed.
Optionally, the first transmission line and the second transmission line form a pair of coupled transmission lines, and the detection circuit includes a plurality of pairs of coupled transmission lines, and the pairs of coupled transmission lines are arranged at intervals in the width direction of the bending portion.
Optionally, the transmitting unit sends a first electrical signal to each of the coupling transmission lines in the detection circuit, the receiving unit is electrically connected to each of the coupling transmission lines, the receiving unit receives a second electrical signal from each of the coupling transmission lines, and the electronic device determines the folding angle of the electronic device according to an average value of the plurality of second electrical signals and the first electrical signal.
Optionally, the first detection portion is a first metal pattern, the second detection portion is a second metal pattern, the first metal pattern and the second metal pattern form a capacitor, a distance between the first metal pattern and the second metal pattern is the first distance, the first metal pattern is connected with the transmitting unit, and the second metal pattern is connected with the receiving unit;
during switching of the electronic device between the folded state and the unfolded state, the first distance is changed to change the total capacitance of the detection circuit.
Optionally, the first metal pattern and the second metal pattern form a double-layer interdigital capacitor; or,
under the condition that the electronic equipment is in a flattened state, orthographic projections of the first metal pattern and the second metal pattern on the bending part are completely overlapped.
Optionally, the transmitting unit and the receiving unit are both fixedly disposed on the first portion or the second portion.
In a second aspect, an embodiment of the present application provides a folding angle detection method applied to the foldable electronic device according to the first aspect, the method includes the following steps:
controlling a transmitting unit to transmit an initial signal, sequentially setting the folding angle of the electronic equipment to a plurality of different preset angles, and receiving a plurality of signals of the electronic equipment with the folding angle at different preset angles from a detection circuit through a receiving unit to obtain a mapping relation between the folding angle of the electronic equipment and the signals received by the receiving unit;
under the condition that the electronic equipment is at any folding angle, controlling the transmitting unit to transmit a first electric signal and receiving a second electric signal from the detection circuit through the receiving unit;
and determining the current folding angle of the electronic equipment according to the first electric signal, the second electric signal and the mapping relation. .
In the embodiment of the application, the first carrier and the second carrier are stacked on the bending part of the electronic device, the detection circuit is arranged on the first carrier and the second carrier, and the total impedance of the detection circuit is changed by utilizing the difference of deformation of the first carrier and the second carrier when the bending part is at different bending angles, so that the first distance between the first detection part and the second detection part in the detection circuit is changed, the second electrical signal received by the receiving unit is also changed, therefore, the folding angle of the electronic device is determined according to the first electrical signal transmitted by the transmitting unit and the second electrical signal received by the receiving unit, the folding angle is not interfered by external geomagnetic field, ambient light, reflected magnetic signals, optical signals and other external signals, no additional shielding material is needed, and the folding angle is not influenced by the holding posture of a user, the system has the advantages of strong anti-interference capability, high integration level and small occupied volume.
Drawings
Fig. 1 is a schematic cross-sectional view of an electronic device provided in an embodiment of the present application in a folded state;
fig. 2 is a schematic cross-sectional view of an electronic device in an unfolded state according to an embodiment of the present disclosure;
fig. 3 is a top view of an electronic device provided in an embodiment of the present application in an unfolded state;
fig. 4 is a schematic view illustrating that a distance between a first carrier and a second carrier is constant when an electronic device is in a folded state according to an embodiment of the present application;
FIG. 5 is a schematic view of a first detecting portion according to an embodiment of the present disclosure;
FIG. 6 is a schematic view of a second detecting portion according to an embodiment of the present disclosure;
FIG. 7 is a second schematic diagram of a first detecting portion according to an embodiment of the present application;
fig. 8 is a second schematic diagram of a second detecting portion according to an embodiment of the present application;
fig. 9 is a schematic diagram of a split-side arrangement of a transmitting unit and a receiving unit provided in an embodiment of the present application;
fig. 10 is a schematic diagram of the transmitting unit and the receiving unit provided in the embodiment of the present application arranged on the same side;
fig. 11 is a schematic flowchart of a folding angle detection method according to an embodiment of the present application;
fig. 12 is a schematic flowchart of a calibration method according to an embodiment of the present application;
fig. 13 is a schematic flowchart of a detection method according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The foldable electronic device and the folding angle detection method provided by the embodiment of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 1 to 3, fig. 1 is a schematic cross-sectional view of an electronic device provided in an embodiment of the present application in a folded state, fig. 2 is a schematic cross-sectional view of an electronic device provided in an embodiment of the present application in an unfolded state, and fig. 3 is a top view of an electronic device provided in an embodiment of the present application in an unfolded state.
The embodiment of the application provides a foldable electronic device, which comprises a bending part A and an angle detection device, wherein the electronic device can be switched between a folded state and an unfolded state, namely the electronic device can be bent at the bending part A so as to be switched between the folded state and the unfolded state; the angle detection device is used for detecting the folding angle of the electronic equipment.
The angle detection device includes a first carrier 21, a second carrier 22, a transmitting unit 23, a detection circuit 25, and a receiving unit 24.
Alternatively, the first carrier 21 and the second carrier 22 may have the same material and shape.
The transmitting unit 23, the detecting circuit 25 and the receiving unit 24 are electrically connected in sequence, the transmitting unit 23 is used for transmitting an electric signal, the electric signal is transmitted to the receiving unit 24 through the detecting circuit 25, and the electric signal is received by the receiving unit 24. For example, the electrical signal sent by the transmitting unit 23 to the detecting circuit is a first electrical signal, while the electrical signal received by the receiving unit 24 from the detecting circuit is a second electrical signal, and if the detecting circuit 25 does not change, that is, the impedance does not change, the second electrical signal received by the receiving unit 24 hardly changes; if the detection circuit 25 changes, that is, the impedance changes, the second electrical signal received by the receiving unit 24 changes accordingly. Therefore, the electronic equipment can determine the current folding angle of the electronic equipment according to the first electric signal and the second electric signal.
In the embodiment of the present application, the first carrier 21 and the second carrier 22 are fixedly disposed at the bending portion a of the electronic device. The first carrier 21 and the second carrier 22 are stacked in the thickness direction of the bent portion a, and have a distance therebetween in the thickness direction of the bent portion a. When the electronic device is folded, that is, when the bending portion a is folded, the first carrier 21 and the second carrier 22 may deform, so that the first distance d between the two changes.
In the present embodiment, the detection circuit 25 includes a first detection portion 251 and a second detection portion 252. The first detecting portion 251 is disposed on the first carrier 21, and the second detecting portion 252 is disposed on the second carrier 22. When the electronic device is switched between the unfolded state and the folded state, the first carrier 21 and the second carrier 22 are deformed. Therefore, the distance between the first detection portion 251 and the second detection portion 252 of the detection circuit 25 is changed, and the first distance d between the first detection portion 251 and the second detection portion 252 of the detection circuit 25 is changed, so that the total impedance of the detection circuit 25 is changed, and the second electrical signal received by the receiving unit 24 is also changed, so that the folding angle of the electronic device can be determined according to the second electrical signal received by the receiving unit 24. That is to say, when the electronic device is at different folding angles, the deformation amount of the first carrier 21 and the deformation amount of the second carrier 22 are different, that is, the distance between the first carrier 21 and the second carrier 22 is different, so that the impedances of the detection circuits 25 disposed on the first carrier 21 and the second carrier 22 are also different, and under the condition that the first electrical signal sent from the transmission unit 23 to the detection circuit 25 is not changed, the second electrical signal received by the reception unit 24 from the detection circuit 25 is different, so that the current folding angle of the electronic device can be determined according to the second electrical signal received by the reception unit 24.
In the embodiment of the present application, optionally, the impedance of the detection circuit 25, that is, the impedance of the whole of the first detection portion 251 and the second detection portion 252, may be at least one of a resistor, a capacitor, and an inductor. For example, the resistance or capacitance or inductance of the detection circuit 25 may be designed to be related to the distance between the first carrier 21 and the second carrier 22, and when the distance between the first carrier 21 and the second carrier 22 changes, the first distance d between the first detection portion 251 and the second detection portion 252 changes, and the resistance or capacitance or inductance of the detection circuit 25 changes accordingly, so as to determine the current folding angle of the electronic device by using the change of regularity.
In the embodiment of the present application, the first carrier 21 and the second carrier 22 are stacked at the bending portion a of the electronic device, and the detection circuit 25 is disposed on the first carrier 21 and the second carrier 22, when the bending portion a is at different bending angles, the amount of deformation of the first carrier 21 and the second carrier 22 is different, which in turn causes the first distance d between the first detection portion 251 and the second detection portion 252 in the detection circuit 25 to change, so that the total impedance of the detection circuit 25 changes, and the second electrical signal received by the receiving unit 24 also changes, so that the folding angle of the electronic device is determined according to the first electrical signal transmitted by the transmitting unit 23 and the second electrical signal received by the receiving unit 24, and is not interfered by external geomagnetic field, ambient light, reflected magnetic signal, optical signal, and other external signals, and no additional shielding material is required, the device is not influenced by the holding posture of the user, and has the advantages of strong anti-interference capability, high integration level and small occupied volume.
In some embodiments of the present application, optionally, the first carrier 21 and the second carrier 22 are flexible circuit boards, and the flexible circuit boards are used as the first carrier 21 and the second carrier 22, which not only facilitates the setting of the detection circuit 25 on the first carrier 21 and the second carrier 22, but also saves the cost of additionally increasing the sensor, and the flexible circuit boards themselves can also be used as electrical connection devices, which is small in size and low in cost, and can reduce the occupation of the internal space of the electronic device, and the material of the flexible circuit boards also meets the requirement of deformation when the electronic device is in a folded state.
In some embodiments of the present application, the electronic device includes a first portion 111 and a second portion 112 that can rotate relatively, the first portion 111 is connected to the second portion 112 through a bending portion a, that is, two sides of the bending portion a are respectively connected to the first portion 111 and the second portion 112, when the first carrier and the second carrier are both flexible circuit boards, two ends of the first carrier 21 and the second carrier 22 are respectively connected to the first portion 111 and the second portion 112, that is, two ends of the first carrier 21 are respectively connected to the first portion 111 and the second portion 112, and two ends of the second carrier 22 are also respectively connected to the first portion 111 and the second portion 112. From this, when electronic equipment was in fold condition, first supporting body and second supporting body can follow the kink A of electronic equipment and take place deformation, lead to the interval between the two to change then.
In other embodiments of the present application, the electronic device further comprises a first fixture 26 and a second fixture 27, the first fixture 26 and the second fixture 27 are used for connecting the electronic device with the first portion 111 and the second portion 112 of the first carrier 21 and the second carrier 22. Specifically, the first fixing device 26 is used to connect the first end of the first carrier 21 and the first end of the second carrier 22 with the first portion 111, and the second fixing device 27 is used to connect the second end of the first carrier 21 and the second end of the second carrier 22 with the second portion 112, so that when the electronic device is in a flattened state, the lengths of the first carrier 21 and the second carrier 22 in the first direction are the same, where the first direction is an extending direction of a side of the bending portion a connecting the first portion 111 and the second portion 112, that is, the side of the bending portion a is connected to both the first portion 111 and the second portion 112.
Referring to fig. 4, fig. 4 is a schematic view illustrating that a distance between the first carrier and the second carrier is constant when the electronic device is in a folded state according to the embodiment of the present application. As shown in fig. 4, assuming that the electronic device is in a folded state, and the folding angle of the electronic device is β, and the first carrier 21 and the second carrier 22 are approximately viewed as a fan shape after being bent and deformed, the distance between the first carrier 21 and the second carrier 22 is constant d, which is calculated by a fan-shaped side length formula:
where L is the side length of the sector, the central angle α of the sector is pi — β, and r is the radius of the sector, the length difference between the second carrier 22 and the first carrier 21 is:
wherein L is2Is the length, L, of the second carrier 221Is the length of the first carrier 21, r2Radius of the second carrier 22 corresponding to the sector, r1Is a first carrier 21Corresponding to the radius of the sector.
As can be seen from the above equation, when d is a constant value, the smaller the folding angle β of the electronic device is, the larger the corresponding fan-shaped central angle α is, and the larger the length difference between the second carrier 22 and the first carrier 21 is. In fact, the length of the first carrier 21 and the second carrier 22 is constant because they are fixed at the bending portion a of the electronic device. Therefore, when the folding angle β of the electronic device becomes smaller, the first carrier 21 near the inner circle is pressed outward to a greater extent, resulting in a smaller distance d between the first carrier 21 and the second carrier 22 in the bending portion a, as shown in fig. 1. Therefore, according to the change rule of the distance d between the first carrier 21 and the second carrier 22, the circuit characteristics of the detection circuit 25 formed by the first detection portion 251 disposed on the first carrier 21 and the second detection portion 252 disposed on the second carrier 22 can be set, so that the impedance value changes accordingly, that is, the resistance, the capacitance, the inductance, and the like change, so that the transmission unit 23 transmits a specific detection signal (i.e., a first electrical signal), after passing through the first detection portion 251 and the second detection portion 252, the signal (i.e., a second electrical signal) received by the receiving unit 24 changes due to the change of the impedance, and the changed signal is compared with the calibration prestored value, so that the accurate detection of the current folding angle can be realized.
Referring to fig. 5 and fig. 6, fig. 5 is one of schematic diagrams of a first detecting portion provided in an embodiment of the present application, and fig. 6 is one of schematic diagrams of a second detecting portion provided in the embodiment of the present application. As shown in fig. 5 and 6, in some embodiments of the present application, the first sensing section 251 is a first transmission line, the second sensing section 252 is a second transmission line, and the first transmission line and the second transmission line are coupled to form a coupled transmission line. That is, the detecting circuit 25 is provided in the form of a coupled transmission line, the first detecting portion 251 provided on the first carrier 21 is provided as a first transmission line, and the second detecting portion 252 provided on the second carrier 22 is provided as a second transmission line, wherein the first transmission line and the second transmission line are both provided extending in a second direction, and when the electronic device is in a flattened state, an angle between the second direction and an extending direction of a side edge of the bent portion a connecting the first portion 111 and the second portion 112 is greater than 45 °, for example, an angle between the second direction and an extending direction of a side edge of the bent portion a connecting the first portion 111 and the second portion 112 is 90 °. The first transmission line and the second transmission line are coupled in pairs, and orthographic projections of the first transmission line and the second transmission line on the display surface of the electronic equipment can be completely overlapped or slightly staggered.
Wherein, the emitting unit 23 is connected to the first end of the first transmission line and the first end of the second transmission line, respectively, and the receiving unit 24 is connected to the second end of the first transmission line and the second end of the second transmission line, respectively, when the folding angle of the electronic device changes, because the deformation amount of the first carrier 21 and the second carrier 22 is different, the distance between the first transmission line and the second transmission line will change, thereby causing the characteristic impedance of the detecting circuit 25 formed by the two lines to change, that is, the impedance of the coupling transmission line formed by the first transmission line and the second transmission line to change. After the transmitting unit 23 sends the first electrical signal to the first transmission line and the second transmission line, the impedance of the detecting circuit 25 changes, and the second electrical signal received by the receiving unit 24 through the first transmission line and the second transmission line changes accordingly, and the current folding angle of the electronic device can be obtained by comparing the received second electrical signal with the calibrated preset value.
In this embodiment, optionally, the first transmission line and the second transmission line may form a coupling microstrip line, may also form a coupling broadside stripline, and the like, and may be specifically set according to requirements.
In this embodiment, optionally, in order to improve the detection accuracy, more accurate impedance change data may be acquired by increasing the lengths of the first transmission line and the second transmission line, widening the widths of the first transmission line and the second transmission line, and providing a plurality of pairs of coupling transmission lines.
In some embodiments of the present application, the number of the first transmission lines and the number of the second transmission lines are the same and are at least two, the first transmission lines and the second transmission lines are coupled in pairs, and one first transmission line and one second transmission line which are coupled form a pair of coupled transmission lines. That is, the sensing circuit 25 includes a plurality of pairs of coupled transmission lines, a first transmission line of each pair constituting a first sensing section 251 disposed on the first carrier 21, a second transmission line of each pair constituting a second sensing section 252 disposed on the second carrier 22, the first and second transmission lines of each pair being in a coupled arrangement. At this time, it is equivalent to a plurality of pairs of coupling transmission lines provided in parallel between the transmitting unit 23 and the receiving unit 24, and the detection accuracy of the folding angle of the electronic device can be improved by providing the plurality of pairs of coupling transmission lines.
Specifically, in the process of detecting the folding angle of the electronic device, the transmitting unit 23 sends a first electrical signal to each pair of coupling transmission lines in the detecting circuit 25, and the receiving unit 24 is electrically connected to each pair of coupling transmission lines and receives a second electrical signal from each pair of coupling transmission lines, so that the electronic device can determine the folding angle of the electronic device according to the received second electrical signals and the first electrical signal, for example, an average value of the received second electrical signals is taken as a final received electrical signal, and the final received electrical signal is compared with a preset value, so as to obtain a more accurate folding angle of the electronic device.
In some embodiments of the present application, optionally, a plurality of pairs of coupled transmission lines are disposed at intervals in the width direction of the bending portion a, that is, a plurality of pairs of coupled transmission lines are disposed at intervals in the extending direction of the side edge of the bending portion a connecting the first portion 111 and the second portion 112.
In other embodiments of the present application, the first sensing part 251 is a first metal pattern, the second sensing part 252 is a second metal pattern, and the first metal pattern and the second metal pattern together form a capacitor. Optionally, a capacitor formed by the first metal pattern and the second metal pattern is a plate capacitor or an interdigital capacitor; for example, when the capacitor formed by the first metal pattern and the second metal pattern is a flat capacitor, when the electronic device is in a flat state, orthographic projections of the first metal pattern and the second metal pattern on the display surface of the electronic device (or on the bending portion a) are at least partially overlapped, that is, completely overlapped or partially overlapped. When the folding angle of the electronic device changes, because the deformation amount of the first carrier 21 and the deformation amount of the second carrier 22 are different, the distance between the first metal pattern and the second metal pattern changes, so that the impedance of the detection circuit 25 formed by the first metal pattern and the second metal pattern changes, that is, the capacitance changes, after the first electrical signal transmitted by the transmission unit 23 is sent to the detection circuit 25, because the impedance of the detection circuit 25 changes, the second electrical signal received by the reception unit 24 from the detection circuit 25 changes, and the current folding angle of the electronic device can be obtained by comparing the received electrical signal with the calibrated preset value.
In some embodiments of the present application, the first metal pattern and the second metal pattern form a double-layer interdigital capacitor, and the double-layer interdigital capacitor structure facilitates disposing the first metal pattern and the second metal pattern on the first carrier and the second carrier, respectively.
In other embodiments of the present application, when the detection circuit 25 is a flat capacitor, under the condition that the electronic device is in a flat state, orthographic projections of the first metal pattern and the second metal pattern on the bending portion a completely coincide, so as to provide a higher capacitance value and improve the detection accuracy of the folding angle of the electronic device.
Referring to fig. 7 and 8, fig. 7 is a second schematic diagram of a first detecting portion provided in the embodiment of the present application, and fig. 8 is a second schematic diagram of a second detecting portion provided in the embodiment of the present application. In some embodiments of the present application, the first detecting portion 251 and the second detecting portion 252 have a square shape. The first detecting portion 251 is connected to the transmitting unit 23, the second detecting portion 252 is connected to the receiving unit 24, and the first detecting portion 251 and the second detecting portion 252 constitute a plate capacitor and are connected between the transmitting unit 23 and the receiving unit 24.
In still other embodiments of the present application, the first sensing portion 251 is a first inductor winding and the second sensing portion 252 is a second inductor winding with mutual inductance therebetween. When the folding angle of the electronic device changes, the distance between the first inductor winding and the second inductor winding changes due to the difference in deformation amount between the first carrier 21 and the second carrier 22, which results in a change in impedance, i.e., a change in inductance, of the detection circuit 25 formed by the first inductor winding and the second inductor winding. After the first electrical signal transmitted by the transmitting unit 23 is sent to the detecting circuit 25, the second electrical signal received by the receiving unit 24 from the detecting circuit 25 will change due to the impedance change of the detecting circuit 25. And comparing the received second electric signal with a calibrated preset value to obtain the current folding angle of the electronic equipment.
The receiving unit 24 in the embodiment of the present application may be a comparator, an ammeter, a voltmeter, and the like, and the present application is not particularly limited.
In some embodiments of the present application, the folding screen 11 includes a first portion 111 and a second portion 112. First portion 111 and second portion 112 are connected through the kink rotation, and first portion 111 corresponds a split screen of electronic equipment, and second portion 112 corresponds another split screen of folding screen 11. The transmitting unit 23 and the receiving unit 24 may be fixedly disposed on either the first portion 111 or the second portion 112, that is, the transmitting unit 23 may be fixed to the first portion 111, and the receiving unit 24 may be fixed to the second portion 112; alternatively, the transmitting unit 23 is fixed to the second section 112, and the receiving unit 24 is fixed to the first section 111; alternatively, both the transmitting unit 23 and the receiving unit 24 are fixed to the first portion 111; alternatively, the transmitting unit 23 and the receiving unit 24 are both fixed to the second portion 112. At this time, the first carrier 21 and the second carrier 22 are properly extended into the first portion 111 or the second portion 112, so that the connection with the transmitting unit 23 and the receiving unit 24 can be realized, thereby saving the connection cost and volume. When the transmitting unit 23 and the receiving unit 24 are both fixed to the first portion 111 or the second portion 112, the internal space of the electronic device occupied by the transmitting unit and the receiving unit can be saved, and the connecting line between the transmitting unit and the receiving unit is prevented from being excessively arranged at the bending portion a, so that the situation that the connecting line is disconnected due to frequent bending of the bending portion a is avoided.
Referring to fig. 9 to 10, fig. 9 is a schematic diagram of a side-by-side arrangement of a transmitting unit and a receiving unit provided in the embodiment of the present application, and fig. 10 is a schematic diagram of a side-by-side arrangement of the transmitting unit and the receiving unit provided in the embodiment of the present application. In some embodiments of the present application, the foldable screen 11 includes a first portion 111 and a second portion 112, and the first portion 111 and the second portion 112 are connected by a bending portion a. As shown in fig. 9, the transmitting unit 23 may be fixedly provided to the first portion 111, and the receiving unit 24 may be fixedly provided to the second portion 112. At this time, the connection between the transmitting unit 23 and the receiving unit 24 can be realized by properly extending the first carrier 21 and the second carrier 22 to both sides; as shown in fig. 10, both the transmitting unit 23 and the receiving unit 24 may be fixedly disposed on the second portion 112, and in this case, the internal space may be saved.
In some embodiments, optionally, the transmitting unit 23 and the receiving unit 24 may also be disposed at the bending portion a of the electronic device to directly connect with the detection circuits 25 on the first carrier 21 and the second carrier 22.
In the embodiment of the present application, optionally, the number of the first carrier 21 and the second carrier 22 is the same and is at least two. When the electronic apparatus is in a flat state, the first carrier 21 and the second carrier 22 are alternately arranged at intervals in a stacked manner in the thickness direction of the folding screen 11. The plurality of first carriers 21 and the plurality of second carriers 22 form an array, so that the detection accuracy of the folding angle can be improved. That is, the number of the first carrier 21 and the second carrier 22 may be multiple, one first carrier 21 and one second carrier 22 form a group, and the arrangement form of each group refers to the above embodiments, and is not described herein again. Taking the coupled transmission line as an example, a pair of coupled transmission lines can be arranged in the same group, and multiple groups correspond to multiple pairs of coupled transmission lines; or, taking the capacitor as an example, two substrates of one capacitor may be arranged in the same group, and multiple groups correspond to multiple capacitors.
In summary, in the embodiment of the present application, by stacking the first carrier and the second carrier at the bending portion a of the electronic device, and providing the detection circuit on the first carrier 21 and the second carrier 22, the deformation amount of the first carrier 21 and the second carrier 22 is different when the bending portion a is at different bending angles, which leads to the change of the first distance d between the first detection portion 251 and the second detection portion 252 in the detection circuit, so that the total impedance of the detection circuit changes, and the second electrical signal received by the receiving unit 24 will also change, so that the folding angle of the electronic device is determined according to the first electrical signal transmitted by the transmitting unit 23 and the second electrical signal received by the receiving unit 24, and will not be interfered by external geomagnetic field, ambient light, and external signals such as reflected magnetic signal and optical signal, and no additional shielding material is required, the device is not influenced by the holding posture of the user, and has the advantages of strong anti-interference capability, high integration level and small occupied volume.
Referring to fig. 11, fig. 11 is a schematic flow chart illustrating a folding angle detection method according to an embodiment of the present application. As shown in fig. 11, an embodiment of the present application further provides a folding angle detection method, including the foldable electronic device according to any of the above embodiments, the method includes the following steps:
step 1101: controlling a transmitting unit to transmit an initial signal, sequentially setting the folding angle of the electronic equipment to a plurality of different preset angles, and receiving a plurality of signals of the electronic equipment with the folding angle at different preset angles from a detection circuit through a receiving unit to obtain a mapping relation between the folding angle of the electronic equipment and the signals received by the receiving unit;
optionally, the plurality of different preset angles may be selected from 0 ° to 180 °, for example, 0 °, 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, 105 °, 120 °, 135 °, 150 °, 180 °, and the like.
The step is a calibration process in the folding angle detection method. The transmitting unit transmits a fixed initial signal to the detection circuit, and when the folding angle of the electronic equipment is adjusted to a preset angle, the signals received by the receiving unit from the detection circuit under the preset angle are recorded once, and after the signals are executed for multiple times, multiple groups of data can be obtained, and finally the mapping relation between the folding angle of the electronic equipment and the signals received by the receiving unit is determined.
Step 1102: under the condition that the electronic equipment is at any folding angle, controlling the transmitting unit to transmit a first electric signal and receiving a second electric signal from the detection circuit through the receiving unit;
step 1103: and determining the current folding angle of the electronic equipment according to the first electric signal, the second electric signal and the mapping relation.
Step 1102 and step 1103 are detection procedures in the folding angle detection method. The transmitting unit transmits a first electrical signal (the first electrical signal may be the same as or different from an initial signal in the calibration process) to the detecting circuit, and receives a second electrical signal from the detecting circuit through the receiving circuit, so that the current folding angle of the electronic device can be calculated according to the first electrical signal, the second electrical signal and the mapping relation.
Therefore, the detection method in the embodiment of the application cannot be interfered by external geomagnetic fields, ambient light, reflected magnetic signals, reflected optical signals and other external signals, does not need to additionally arrange shielding materials, cannot be influenced by the holding posture of a user, and has the advantages of strong anti-interference capability and high detection precision.
The calibration process in the folding angle detection method is described below as an example with the detection circuit as a coupled transmission line.
Referring to fig. 12, fig. 12 is a schematic flowchart illustrating a calibration method according to an embodiment of the present disclosure. As shown in fig. 12, the calibration method in the embodiment of the present application includes the following steps:
step 1201: setting an initial state;
firstly, setting an initial state, and defining an initial folding angle value beta of the electronic equipment to be 0 degrees; setting the number of times of measurement, wherein n is the nth measurement, and the initial value n is 0;
step 1202: the transmitting unit transmits a specified signal;
the transmitting unit 23 transmits a specified signal as an initial signal;
step 1203: setting a folding angle of the electronic equipment to be beta;
the folding angle of the electronic device is bent to a specific folding angle β, and since the folding angle β of the electronic device changes, the distance between the first transmission line and the second transmission line changes at this time, so that the characteristic impedance of the formed coupling transmission line changes, that is, the impedance of the detection circuit 25 changes;
step 1204: the receiving unit receives a signal;
receiving, by the receiving unit 24, a signal transmitted by the transmitting unit 23 and transmitted via the detecting circuit 25; after the designated signal transmitted by the transmitting unit 23 passes through the coupled transmission line, there is also a difference in the electrical signal received at the receiving unit 24 due to the change in characteristic impedance, which is denoted as an；
Step 1205: judging whether the folding angle beta is smaller than 180 degrees;
judging the bending angle beta of the electronic equipment, and stopping detection and skipping to the step 1206 if the folding angle beta is larger than or equal to 180 degrees; if the folding angle beta is smaller than 180 degrees, continuing to calibrate, and executing step 1207;
step 1206: n groups of folding angles and corresponding electric signals anRespectively storing the data into a memory;
in this step, the obtained n sets of folding angles and the corresponding received electrical signal a are combinednRespectively storing the two signals in a memory to obtain a folding angle beta and an electric signal anThe mapping relationship of (2);
step 1207: increasing the folding angle of the electronic equipment by 15 degrees, increasing the measurement times n by 1, and skipping to the step 1202;
in this step, the folding angle β of the electronic device is increased by 15 °, the number of measurement n is increased by 1, and the steps 1202 to 1205 are repeated again, that is, after the folding angle is increased by 15 °, the measurement count n is increased by 1, and then the next test is performed until the condition that the folding angle β is greater than or equal to 180 ° is satisfied in step 1205, and then step 1206 is executed, and finally the calibration is finished.
Optionally, the angle value 15 ° that the folding angle of the electronic device is increased each time in the above embodiments of the present application is only exemplary, and may be specifically set according to actual requirements, so as to obtain higher detection accuracy.
The following describes an exemplary detection process in the folding angle detection method by using the detection circuit as a coupled transmission line.
Referring to fig. 13, fig. 13 is a schematic flowchart of a detection method according to an embodiment of the present application. As shown in fig. 13, the detection method in the embodiment of the present application includes the following steps:
step 1301: the transmitting unit transmits a first electric signal;
the first electrical signal transmitted by the transmitting unit 23 may be the same as or different from the initial signal in the calibration process.
Step 1302: the electronic equipment is folded to any angle beta;
when the electronic device is bent to any angle β smaller than 180 °, since the folding angle β of the electronic device changes, the distance between the first transmission line and the second transmission line changes, and thus the characteristic impedance of the formed coupling transmission line changes, that is, the impedance of the detection circuit 25 changes;
step 1303: the receiving unit receives the second electric signal;
receiving the second electrical signal from the detection circuit 25 with the receiving unit 24; after the first electrical signal transmitted by the transmitting unit 23 passes through the coupling transmission line, the second electrical signal received at the receiving unit 24 changes due to the change of the characteristic impedance;
step 1304: the processor processes the second electrical signal;
the processor processes the second electrical signal, compares the second electrical signal received by the receiving unit 24 with the calibration value, and obtains the range of the folding angle;
step 1305: resulting in a fold angle beta.
It can be seen that the detection method in the embodiment of the application is not interfered by external geomagnetic fields, ambient light, reflected magnetic signals, optical signals and other external signals, does not need to additionally arrange shielding materials, is not influenced by the holding posture of a user, and has the advantages of strong anti-interference capability and high detection precision.
It should be noted that the electronic device in the embodiment of the present application may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a Personal Computer (PC), a Television (TV), a teller machine, a self-service machine, and the like, and the embodiments of the present application are not particularly limited.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element identified by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A foldable electronic device, comprising a bending part (A) and an angle detection device, wherein the electronic device can be switched between a folded state and an unfolded state, and the angle detection device comprises a first bearing body (21), a second bearing body (22), a transmitting unit (23), a detection circuit (25) and a receiving unit (24);
the first carrier (21) and the second carrier (22) are disposed at the bent portion (a), and the first carrier (21) and the second carrier (22) are stacked in the thickness direction of the bent portion (a);
the detection circuit (25) comprises a first detection portion (251) and a second detection portion (252), the first detection portion (251) being disposed on the first carrier (21), the second detection portion (252) being disposed on the second carrier (22);
the emitting unit (23) sends a first electric signal to the detection circuit (25), the receiving unit (24) is electrically connected with the detection circuit (25), the receiving unit (24) is a second electric signal from the signal received by the detection circuit (25), in the process of switching between the folded state and the unfolded state of the electronic device, a first distance between the first detection part (251) and the second detection part (252) is changed, so that the total impedance of the detection circuit (25) is changed, and the electronic device determines the folding angle of the electronic device according to the first electric signal and the second electric signal.
2. The electronic device according to claim 1, wherein the electronic device comprises a first portion (111) and a second portion (112) which are relatively rotatable, the first portion (111) and the second portion (112) are connected by the bending portion (a), the first carrier (21) and the second carrier (22) are both flexible circuit boards, and two ends of the first carrier (21) and the second carrier (22) are respectively connected with the first portion (111) and the second portion (112).
3. The electronic device according to claim 2, wherein the first carrier (21) and the second carrier (22) have the same length in a first direction, which is an extending direction of a side of the bending portion (a) connecting the first portion (111) and the second portion (112), when the electronic device is in a flattened state.
4. The electronic device according to claim 1, wherein the electronic device comprises a first portion (111) and a second portion (112) which are relatively rotatable, the first detecting portion (251) is a first transmission line, the second detecting portion (252) is a second transmission line, the first transmission line is coupled to the second transmission line, the first transmission line and the second transmission line are both extended along a second direction, and when the electronic device is in a flattened state, an included angle between the second direction and an extending direction of a side edge of the bending portion (a) connecting the first portion (111) and the second portion (112) is greater than 45 °;
in the process of switching the electronic device between the folded state and the unfolded state, the first distance between the first detecting portion (251) and the second detecting portion (252) is changed so that the total impedance of the detecting circuit (25) is changed, and the second electric signal received by the receiving unit (24) from the detecting circuit (25) is changed.
5. The electronic device according to claim 4, wherein the first transmission line and the second transmission line constitute a pair of coupled transmission lines, and the detection circuit (25) includes a plurality of pairs of coupled transmission lines arranged at intervals in a width direction of the bent portion (A).
6. The electronic device of claim 5, wherein the transmitting unit (23) sends a first electrical signal to each of the coupled transmission lines in the detecting circuit (25), the receiving unit (24) is electrically connected to each of the coupled transmission lines, the receiving unit (24) receives a second electrical signal from each of the coupled transmission lines, and the electronic device determines the folding angle of the electronic device according to an average value of a plurality of the second electrical signals and the first electrical signal.
7. The electronic device according to claim 1, wherein the first detecting portion (251) is a first metal pattern, the second detecting portion (252) is a second metal pattern, the first metal pattern and the second metal pattern constitute a capacitor, a pitch between the first metal pattern and the second metal pattern is the first pitch, the first metal pattern is connected to the transmitting unit (23), and the second metal pattern is connected to the receiving unit (24);
the first distance is changed during switching of the electronic device between the folded state and the unfolded state to change the total capacitance of the detection circuit (25).
8. The electronic device of claim 7, wherein the first metal pattern and the second metal pattern form a double-layer interdigital capacitor; or,
when the electronic device is in a flattened state, orthographic projections of the first metal pattern and the second metal pattern on the bending part (A) are completely overlapped.
9. The electronic device according to claim 2, characterized in that the transmitting unit (23) and the receiving unit (24) are both fixedly arranged in the first portion (111) or the second portion (112).
10. A folding angle detection method applied to the foldable electronic device according to any one of claims 1 to 9, the method comprising the steps of:
controlling a transmitting unit (23) to transmit an initial signal, sequentially setting the folding angle of the electronic equipment to a plurality of different preset angles, and receiving a plurality of signals of the electronic equipment with the folding angle at different preset angles from a detection circuit (25) through a receiving unit (24) to obtain a mapping relation between the folding angle of the electronic equipment and the signals received by the receiving unit (24);
controlling the transmitting unit (23) to transmit a first electric signal and receiving a second electric signal from a detecting circuit (25) through a receiving unit (24) under the condition that the electronic equipment is at any folding angle;
and determining the current folding angle of the electronic equipment according to the first electric signal, the second electric signal and the mapping relation.
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