Bendable equipment form detection assembly and display equipment

Abstract

The utility model belongs to the technical field of display, and discloses a bendable equipment form detection assembly and display equipment. The bendable equipment shape detection assembly comprises an induction unit and an induction trigger body, the induction unit and the induction trigger body are arranged in a bending area of bendable equipment, and the bending area has a first flattened state and a second bent state; in the first state, the induction unit is separated from the induction trigger body, and the induction unit is configured to output a first induction electric signal in a non-deformation state; in the second state, the induction triggering body makes contact with the induction unit, the induction triggering body extrudes the induction unit to deform, and the induction unit is configured to output a second induction electric signal in the deformation state; wherein the first induction electric signal is different from the second induction electric signal. The bendable equipment shape detection assembly is simple in structure, can realize accurate detection of the bending state and the flattening state of the bendable equipment in the corresponding bending area, and is high in detection sensitivity.

Description

Technical Field

[0001] The utility model belongs to the field of display technology, and specifically relates to a bendable device form detection component and a display device. Background Art

[0002] With the development of display devices that can be rolled or folded, the detection of the bending state of the display device has become an important issue. The existing technology uses a piezoresistive sensing component to detect the bending state of the display device, which has low sensitivity and is greatly affected by external environments such as temperature and humidity. It is difficult to meet the use needs of the diversified application scenarios of existing consumer electronic products. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a bendable device morphology detection component and a display device.

[0004] In a first aspect of the utility model, a bendable device morphology detection component is provided, comprising: a sensing unit and a sensing trigger body, wherein the sensing unit and the sensing trigger body are arranged in a bending region of the bendable device, and the bending region has a first flattened state and a second bent state;

[0005] In the first state, the sensing unit and the sensing trigger body are separated, and the sensing unit is configured to output a first sensing electrical signal in a non-deformed state;

[0006] In the second state, the induction trigger body contacts the induction unit, and the induction trigger body squeezes the induction unit to deform, and the induction unit is configured to output a second induction electrical signal in the deformed state; wherein the first induction electrical signal is different from the second induction electrical signal.

[0007] The bendable device morphology detection component provided by the present application has a simple structure and is easy to implement. It utilizes the cooperation of the sensing unit and the sensing trigger body to achieve accurate detection of the bending state and the flattening state of the bendable device in the corresponding bending area, and has high detection sensitivity.

[0008] In addition, the bendable device morphology detection component of the utility model may also have the following additional technical features:

[0009] Preferably, it further comprises a guide groove, the sensing unit is arranged in the guide groove, and there is a gap between the sensing unit and the bottom of the guide groove;

[0010] The induction trigger body is at least partially located in the guide groove.

[0011] Preferably, a first positioning portion is provided in the guide groove, and the sensing unit is located between the first positioning portion and the bottom of the guide groove;

[0012] The induction trigger body is provided with a second positioning portion. In the second state, the first positioning portion is positioned and matched with the second positioning portion to limit the induction trigger body from moving toward the induction unit.

[0013] Preferably, the guide groove is an arc-shaped groove, and the induction trigger body includes an arc-shaped piece.

[0014] Preferably, the bending area comprises a first component and a second component connected in a hinge, the guide groove is arranged on the opposite side of one of the first component and the second component, and the arc-shaped member is arranged on the opposite side of the other component.

[0015] Preferably, the sensing unit includes a substrate and a Wheatstone bridge arranged on the substrate.

[0016] Preferably, the Wheatstone bridge includes a first resistor, a second resistor, a third resistor and a fourth resistor; wherein the first resistor and the second resistor are connected in series to form a first series circuit, the third resistor and the fourth resistor are connected in series to form a second series circuit, and the first series circuit and the second series circuit are connected in parallel to form a Wheatstone bridge.

[0017] Preferably, the first resistor and the second resistor are arranged on the substrate, the resistance value of one of the first resistor and the second resistor increases, the resistance value of the other resistor decreases, the resistance value changes of the first resistor and the second resistor are the same, and the third resistor and the fourth resistor are fixed value resistors;

[0018] Alternatively, the first resistor is disposed on the substrate, the first resistor is a variable resistance resistor, and the second resistor, the third resistor and the fourth resistor are fixed resistance resistors;

[0019] Alternatively, the first resistor, the second resistor, the third resistor and the fourth resistor are all arranged on the substrate, the first resistor and the second resistor are symmetrically arranged on both sides of the substrate, the third resistor and the fourth resistor are symmetrically arranged on both sides of the substrate, the first resistor and the fourth resistor are located on the same side of the substrate, the second resistor and the third resistor are located on the other side of the substrate, and the first resistor, the second resistor, the third resistor and the fourth resistor have the same resistance change.

[0020] Preferably, the bendable device has a plurality of bending regions, a plurality of first series circuits corresponding to the Wheatstone bridges of the plurality of bending regions are connected in parallel, and the plurality of parallel-connected first series circuits are connected in parallel with at least one second series circuit.

[0021] A second aspect of the present invention provides a display device, comprising at least one bending area, each of which is provided with a bendable device morphology detection component as described in any embodiment of the present application.

[0022] Preferably, the display device includes a display panel, the display panel includes a main display area and side display areas arranged on both sides of the main display area, and a connection between the main display area and the side display area is located in the bending area.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0025] Figure 1 An exemplary structural diagram of a bendable device provided in an embodiment of the present application; wherein: Figure 1 (a) is a side view of the bendable device; Figure 1 (b) is a diagram of the bendable device in a fully bent state; Figure 1 (c) is a rear view of the bendable device;

[0026] Figure 2 for Figure 1 An exemplary structural diagram of a detection component in a middle bending region;

[0027] Figure 3 for Figure 2 A partial enlarged view of the first bending link in the middle;

[0028] Figure 4 for Figure 3 The structural diagram of the induction trigger body and the induction unit;

[0029] Figure 5 for Figure 2 A structural diagram showing that the first bending link and the second bending link are both in a bent state;

[0030] Figure 6 for Figure 5 A partial enlarged view of the first bending link in the middle;

[0031] Figure 7 for Figure 5The structural diagram of the induction trigger body and the induction unit;

[0032] Figure 8 A half-bridge Stone bridge circuit diagram provided for an embodiment of the present application;

[0033] Fig. 9 An exemplary circuit diagram of multiple Stone bridges of a bendable device provided in an embodiment of the present application;

[0034] Fig.10 Another exemplary circuit diagram of multiple Stone bridges of a bendable device provided in an embodiment of the present application;

[0035] Fig.11 An exemplary structural diagram of a bendable device provided in an embodiment of the present application;

[0036] Fig.12 An exemplary structural diagram of an intermediate bending state of a bendable device provided in an embodiment of the present application.

[0037] In the above figure: 100 detection component; 110 induction trigger body; 120 substrate; 130 Wheatstone bridge; 131 first resistor; 132 second resistor; 133 third resistor; 134 fourth resistor; 140 guide groove; 150 first positioning portion; 160 second positioning portion;

[0038] 200 display device; 210 display panel; 211 main display area; 212 side display area; 213 bending area; 220 housing; 221 first component; 222 second component; 223 first bending link; 224 second bending link; 225 third bending link; 226 fourth bending link; 230 strap; 240 electrocardiogram sensor.

[0039] 300 power module; 310 processor; 320 memory; 330 main control module; 340 NFC module; 350 drive module; 360 Camera module. DETAILED DESCRIPTION

[0040] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0043] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, ie, meaning "including, but not limited to."

[0044] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" are intended to indicate that a specific feature, structure, material or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0046] like Figures 1 to 7 As shown, in a first aspect of an embodiment of the present application, a bendable device form detection component 100 is provided, comprising: a sensing unit and a sensing trigger body 110, wherein the sensing unit and the sensing trigger body 110 are arranged in a bending region 213 of the bendable device, and the bending region 213 has a first flattened state and a second bent state;

[0047] In the first state, the sensing unit and the sensing trigger body 110 are separated, and the sensing unit is configured to output a first sensing electrical signal in a non-deformed state;

[0048] In the second state, the induction trigger body 110 contacts the induction unit, and the induction trigger body 110 squeezes the induction unit to deform, and the induction unit is configured to output a second induction electrical signal in the deformed state; wherein the first induction electrical signal is different from the second induction electrical signal.

[0049] Specifically, the bendable device has a bend area 213, and the bendable device has two states in the bend area 213, one of which is in a first state of being flattened, and the other is in a second state of being bent, and the bendable device can switch between the first state and the second state in the bend area 213. The bendable device can be a display device 200, and the display device 200 includes a display panel 210 and a housing 220, and the display panel 210 and / or the housing 220 have a bend area 213.

[0050] The bendable device morphology detection component 100 provided in the embodiment of the present application includes a sensing unit and a sensing trigger body 110, and the sensing unit and the sensing trigger body 110 are both arranged on the display panel 210 or the shell 220, preferably arranged on the shell 220, so that the stacking design of the display panel 210 can remain unchanged, and the structural design of the display panel 210 is not affected. The detection component 100 arranged on the shell 220 can match different display panels 210 to achieve multi-dimensional matching of the detection component 100 and the display panel 210. When a display panel 210 fails, only the display panel 210 needs to be replaced without replacing the detection component 100 on the shell 220, thereby reducing costs.

[0051] The detection principle of the bendable device form detection component 100 provided in the embodiment of the present application is as follows: when the bendable device is in a first flattened state in the bending area 213, the sensing unit and the sensing trigger body 110 are separated, the sensing unit does not deform and outputs a first sensing electrical signal, and the first sensing electrical signal indicates that the bendable device is in a flattened state in the corresponding bending area 213; when the bendable device is in a second bent state in the bending area 213, the sensing trigger body 110 and the sensing unit will contact during the bending process of the bendable device, and the sensing trigger body 110 will squeeze the sensing unit to deform the sensing unit, and the sensing unit will convert its own deformation into a second sensing electrical signal, and the second sensing electrical signal indicates that the bendable device is in a bent state in the corresponding bending area 213. Among them, the first sensing electrical signal is different from the second sensing electrical signal, and the different sensing electrical signals output by the detection component 100 are used to realize the detection of the product form (flattened state or bent state) of the bendable device in the corresponding bending area 213.

[0052] In this example, the bendable device morphology detection component 100 has a simple structure and is easy to implement. By utilizing the cooperation of the sensing unit and the sensing trigger body 110, accurate detection of the bending state and the flattening state of the bendable device in the corresponding bending area 213 is achieved with high detection sensitivity.

[0053] In some embodiments, Figure 2 and Figure 3As shown, it also includes a guide groove 140 , the sensing unit is disposed in the guide groove 140 , and there is a gap between the sensing unit and the groove bottom of the guide groove 140 ; ​​the induction trigger body 110 is at least partially located in the guide groove 140 .

[0054] Specifically, the sensing unit and at least part of the sensing trigger body 110 are located in the guide groove 140. When the bendable device is bent in the bending area 213, the limiting effect of the guide groove 140 is used to make the sensing trigger body 110 move only toward or away from the sensing unit along the guide groove 140. When the sensing trigger body 110 moves toward the side close to the sensing unit, it is ensured that the sensing trigger body 110 can accurately contact the sensing unit, so that the second sensing electrical signal can be accurately output, thereby improving the detection accuracy of the detection component 100.

[0055] A gap is reserved between the sensing unit and the bottom of the guide groove 140, that is, the sensing unit is not directly arranged on the bottom of the guide groove 140, and when the bendable device is bent in the corresponding bending area 213, the reserved gap can provide enough space to ensure that the sensing unit is bent and deformed due to the extrusion of the sensing trigger body 110. It can be understood that the sensing unit can be a pressure sensing unit, that is, the pressure sensing unit is bent and deformed based on the pressure generated by the extrusion of the sensing trigger body 110.

[0056] In some embodiments, Figure 3 and Figure 6 As shown, a first positioning portion 150 is disposed in the guide groove 140, and the sensing unit is located between the first positioning portion 150 and the bottom of the guide groove 140;

[0057] The inductive trigger body 110 is provided with a second positioning portion 160 . In the second state, the first positioning portion 150 is positioned and matched with the second positioning portion 160 to limit the inductive trigger body 110 from moving toward the inductive unit.

[0058] Specifically, the first positioning portion 150 provided in the guide groove 140 and the second positioning portion 160 provided on the induction trigger body 110 can be positioned and matched to prevent the induction trigger body 110 from excessively moving toward the side close to the induction unit during the bending process of the bendable device, thereby avoiding excessive deformation of the induction unit to cause damage.

[0059] Exemplarily, the first positioning portion 150 is an annular baffle with a limiting hole inside, and the periphery of the annular baffle is fixedly connected to the side wall of the guide groove 140; or, the first positioning portion 150 is at least two limiting blocks arranged along the inner circumference of the guide groove 140, and the plurality of limiting blocks enclose a limiting hole. The size of the limiting hole is required to ensure that the induction trigger body 110 can pass through but the second positioning portion 160 cannot pass through.

[0060] The second positioning part 160 is an arc-shaped slide bar, which is fixedly connected to the end of the induction trigger body 110 away from the induction unit. The curvature of the arc-shaped slide bar matches the guide groove 140, which guides the moving direction of the arc-shaped slide bar. The arc-shaped slide bar is positioned and matched with the through hole of the first positioning part 150, which can limit the degree of extrusion of the induction trigger body 110 on the induction unit to prevent the induction unit from being over-extruded. Alternatively, the second positioning part 160 is provided with at least two protrusions along the circumference of the induction trigger body 110, and the protrusions are positioned and matched with the first positioning part 150 to limit the movement of the induction touch body toward the induction unit to prevent the induction unit from being over-extruded.

[0061] In some embodiments, Figure 2 and Figure 6 As shown, the guide groove 140 is an arc-shaped groove, and the induction trigger body 110 includes an arc-shaped member.

[0062] Specifically, the guide groove 140 is an arc-shaped groove, and the sensing trigger body 110 is an arc-shaped part that matches the arc-shaped groove, which can limit the moving direction of the arc-shaped part, ensure that the arc-shaped part can be accurately aligned with the sensing unit during the bending process of the bendable device, and realize the squeezing of the sensing unit, so that the sensing unit can accurately convert its own deformation into a second sensing electrical signal, thereby improving the detection sensitivity of the detection component 100.

[0063] It can be understood that the second positioning portion 160 can also be an arc-shaped sliding rod matching the arc-shaped groove, and the arc-shaped member is an arc-shaped rod, and the end of the arc-shaped rod away from the sensing unit is fixedly connected to the arc-shaped sliding rod. The size of the arc-shaped sliding rod is larger than the size of the arc-shaped member, so that the arc-shaped member can smoothly pass through the first positioning portion 150 and contact the sensing unit, and through the positioning cooperation of the first positioning portion 150 and the second positioning portion 160, the distance that the arc-shaped member moves toward the sensing unit is limited.

[0064] In some embodiments, Figure 2 and Figure 5 As shown, the bending area 213 includes a first component 221 and a second component 222 connected by hinges, and the guide groove 140 is arranged on the opposite side of one of the first component 221 and the second component 222, and the arc-shaped member is arranged on the opposite side of the other component.

[0065] Specifically, the bending area 213 includes a first component 221 and a second component 222 connected by a hinge, wherein the first component 221 and the second component 222 are respectively provided with a guide groove 140 and an arc-shaped member on opposite sides thereof, the arc-shaped member can be inserted into the guide groove 140, and when the bendable device is bent in the corresponding bending area 213, the arc-shaped member can move toward or away from the groove bottom of the guide groove 140 in the guide groove 140. Exemplarily, the guide groove 140 is provided on a side of the first component 221 close to the second component 222, and the arc-shaped member is provided on a side of the second component 222 close to the first component 221; or, the arc-shaped member is provided on a side of the first component 221 close to the second component 222, and the guide groove 140 is provided on a side of the second component 222 close to the first component 221.

[0066] It is understandable that the bendable device may be provided with a plurality of bending regions 213 , and a corresponding sensing unit and a sensing trigger body 110 may be provided in each bending region 213 , so that the shape detection of each bending region 213 of the bendable device can be realized.

[0067] In some embodiments, the sensing unit includes a substrate 120 and a Wheatstone bridge 130 disposed on the substrate 120 .

[0068] Specifically, the Wheatstone bridge 130 includes any one of a single-arm type, a half-bridge type, and a full-bridge type Wheatstone bridge 130, preferably a half-bridge type and a full-bridge type Wheatstone bridge. The substrate 120 is a deformable carrier. When the bendable device is in a first state of being flattened at the bending area 213, the substrate 120 and the arc-shaped member are in a separated state, the substrate 120 does not deform, and the Wheatstone bridge 130 outputs a first induced electrical signal to indicate that the bendable device is in a flattened state in the corresponding bending area 213. When the bendable device is in a second state of bending in the bending area 213, the arc-shaped member contacts the substrate 120, and the arc-shaped member squeezes the substrate 120 to deform the substrate 120. The Wheatstone bridge 130 can convert the deformation of the substrate 120 into a second induced electrical signal to indicate that the bendable device is in a bending state in the corresponding bending area 213.

[0069] In some embodiments, Figure 8 As shown, the Wheatstone bridge 130 includes a first resistor 131, a second resistor 132, a third resistor 133 and a fourth resistor 134; wherein the first resistor 131 and the second resistor 132 are connected in series to form a first series circuit, the third resistor 133 and the fourth resistor 134 are connected in series to form a second series circuit, and the first series circuit and the second series circuit are connected in parallel to form the Wheatstone bridge 130.

[0070] Specifically, the Wheatstone bridge 130 includes a first resistor 131, a second resistor 132, a third resistor 133 and a fourth resistor 134, wherein the first resistor 131 and the second resistor 132 are connected in series to form a first series circuit, the third resistor 133 and the fourth resistor 134 are connected in series to form a second series circuit, and the first series circuit and the second series circuit are connected in parallel to form the Wheatstone bridge 130.

[0071] The first resistor 131 and the second resistor 132 are connected to a first node, and the first node outputs a first voltage signal; the third resistor 133 and the fourth resistor 134 are connected to a second node, and the second node outputs a second voltage signal; a voltage difference detector is set between the first node and the second node, and the voltage difference detector obtains a voltage difference ΔV between the first node and the second node, and the voltage difference ΔV is the difference between the first voltage value output by the first node and the second voltage output by the second node, and different voltage differences ΔV represent different induced electrical signals output by the detection component 100. The first resistor 131 and the third resistor 133 are connected to a third node, and the third node is connected to a power supply (VCC); the second resistor 132 and the fourth resistor 134 are connected to a fourth node, and the fourth node is grounded (GND).

[0072] For the single-arm, half-bridge and full-bridge Wheatstone bridges 130, when the bendable device is in the first flattened state in the corresponding bending area 213, the substrate 120 and the arc-shaped member are in a phase-separated state, and the substrate 120 does not deform, that is, the resistance values ​​of the four resistors of the single-arm, half-bridge and full-bridge Wheatstone bridges 130 do not change, and the voltage difference signal between the first node and the second node output by the Wheatstone bridge 130 is used as the first induced electrical signal. Preferably, the resistance values ​​of the first resistor 131 and the second resistor 132 are the same, and the resistance values ​​of the third resistor 133 and the fourth resistor 134 are the same. Further preferably, the resistance values ​​of the first resistor 131, the second resistor 132, the third resistor 133 and the fourth resistor 134 in the initial state are all the same, and when the bendable device is in a flattened state in the bending area 213, the Wheatstone bridge 130 is in a balanced state, and the voltage difference ΔV between the first node and the second node is 0, that is, the first induced electrical signal output by the Wheatstone bridge 130 when the bending area 213 corresponding to the bendable device is in a flattened state is 0.

[0073] Among them, the single-arm Wheatstone bridge 130 only uses one bridge arm to detect the pressure signal. Among the four resistors of the single-arm Wheatstone bridge 130 (such as the initial resistance values ​​of the four resistors are equal), one resistor is set on the substrate 120, and the other three resistors are set on the non-substrate. For example, the first resistor is set on the substrate, the first resistor is a variable resistance resistor such as a varistor, and the second resistor, the third resistor and the fourth resistor are fixed resistances; when the bendable device is in the second state of bending in the corresponding bending area 213, only the first resistor 131 changes its resistance due to the deformation of the substrate 120, and the voltage difference ΔV between the first node and the second node output by the single-arm Wheatstone bridge 130 is ΔV=│VCC*(ΔR1) / (4R1+2ΔR1)│. When ΔR1 is much smaller than R1, ΔV=VCC*(ΔR1) / 4R1, wherein ΔR1 is the resistance change of the first resistor 131, and R1 is the resistance value of the first resistor 131. Among them, the varistor will change its resistance value when sensing strain, while the resistance value of the fixed resistor will not change.

[0074] The half-bridge Wheatstone bridge 130 uses two bridge arms for pressure signal detection, wherein the first resistor 131 and the second resistor 132 have equal resistance values ​​and are both varistors, the third resistor 133 and the fourth resistor 134 have equal resistance values ​​and are both fixed resistors, the first resistor 131 and the second resistor 132 are arranged on the substrate 120, and the third resistor 133 and the fourth resistor 134 are arranged on the non-substrate. Preferably, the third resistor 133 and the fourth resistor 134 are arranged on the groove wall of the guide groove 140, so that the first resistor 131, the second resistor 132, the third resistor 133 and the fourth resistor 134 are in the same area, and the temperature and humidity resistivity of the four resistors are equal, so that the temperature and humidity environments in which they are located match, and the influence of environmental factors such as temperature and humidity on the resistance values ​​of the four resistors can offset each other, so that the detection component 100 can better eliminate the influence of environmental factors such as temperature and humidity when detecting the state of the bendable device, thereby improving the detection accuracy of the detection component 100. Exemplarily, the first resistor 131 and the second resistor 132 are both arranged at intervals on the same side of the substrate 120, such as both arranged on the side of the substrate 120 facing or away from the inductive trigger body 110, or the first resistor 131 and the second resistor 132 are arranged at two sides of the substrate 120 in a staggered manner. When the bendable device is in the second state of bending in the corresponding bending area 213, the resistance changes of the first resistor 131 and the second resistor 132 are different. Figure 6 and Figure 7As shown, the first resistor 131 and the second resistor 132 are arranged symmetrically (or symmetrically) on both sides of the substrate 120 along the axis of the substrate 120. The first resistor 131 is arranged on the side of the substrate 120 close to the inductive trigger body 110, and the second resistor 132 is arranged on the side substantially away from the inductive trigger body 110. When the bendable device is in the second state of bending in the corresponding bending area 213, the first resistor 131 is subjected to the compressive stress of the inductive trigger body 110, and its resistance value decreases, and the second resistor 132 is subjected to the tensile stress, and its resistance value increases. Since the pressure-sensitive temperature-humidity resistivity of the first resistor 131 and the second resistor 132 are also equal, the resistance change (ΔR1) of the first resistor 131 and the resistance change (ΔR2) of the second resistor 132 are negatively correlated and their absolute values ​​are the same, that is, ΔR1=-ΔR2, and the voltage difference ΔV between the first node and the second node=│VCC*ΔR1 / 2R1│. The amplitude of the second induced electrical signal output by the half-bridge Wheatstone bridge 130 is increased by 2 times compared with that of the single-arm Wheatstone bridge 130 , thereby improving the detection sensitivity.

[0075] The full-bridge Wheatstone bridge 130 uses four bridge arms to detect pressure signals, wherein the first resistor 131, the second resistor 132, the third resistor 133 and the fourth resistor 134 are all piezoresistors arranged on the substrate 120, and the resistance values ​​of the four resistors are equal. The first resistor 131 and the second resistor 132 are symmetrically arranged on both sides of the substrate 120 along the axial direction of the substrate 120, the third resistor 133 and the fourth resistor 134 are symmetrically arranged on both sides of the substrate 120 along the axial direction of the substrate 120, and the first resistor 131 and the fourth resistor 134 are symmetrically arranged on both sides of the substrate 120 along the axial direction of the substrate 120. The substrate 120 is located on a side close to the inductive trigger body 110, and the second resistor 132 and the third resistor 133 are located on a side of the substrate 120 away from the inductive trigger body 110. When the bendable device is in the second state of bending in the corresponding bending area 213, the relationship between the resistance changes of the four resistors is: ΔR1 = -ΔR2 = ΔR4 = -ΔR3, ΔR3 is the resistance change of the third resistor 133, ΔR4 is the resistance change of the fourth resistor, and the voltage difference ΔV between the first node and the second node is │VCC*ΔR1 / R1│. The amplitude of the second inductive electrical signal output by the full-bridge Wheatstone bridge 130 is increased by 2 times relative to the half-bridge Wheatstone bridge 130, further improving the detection sensitivity.

[0076] Therefore, the absolute value of the second induced electrical signal output by the single-arm, half-bridge and full-bridge Wheatstone bridges 130 when the bending area 213 corresponding to the bendable device is in a bent state is greater than the absolute value of the first induced electrical signal output when the bending area 213 corresponding to the bendable device is in a flattened state. The difference between the first induced electrical signal and the second induced electrical signal is used to detect the shape of the bendable device, and the detection sensitivity is high and is not affected by environmental factors such as temperature and humidity.

[0077] In some embodiments, Figure 1 As shown, the bendable device has a plurality of bending regions 213, a plurality of first series circuits corresponding to the Wheatstone bridges 130 of the plurality of bending regions 213 are connected in parallel, and a plurality of parallel-connected first series circuits are connected in parallel with at least one second series circuit.

[0078] Specifically, the bendable device has multiple bending areas 213, and each bending area 213 corresponds to a detection component 100, that is, each bending area 213 is provided with a sensing trigger body 110 and a sensing unit, and the sensing unit includes a substrate 120 and a Wheatstone bridge 130 arranged on the substrate 120. Therefore, multiple bending areas 213 correspond to multiple Wheatstone bridges 130.

[0079] The multiple Wheatstone bridges 130 correspondingly include multiple first series circuits and at least one second series circuit, wherein the multiple first series circuits are connected in parallel, and the multiple parallel-connected first series circuits are connected in parallel with at least one second series circuit, which can reduce the setting of the third resistor 133 and the fourth resistor 134 elements, save space, and reduce costs.

[0080] For example, Fig. 9 As shown, when the bendable device has four bending regions 213, each bending region 213 is provided with a Wheatstone bridge 130, the first resistors 131 and the second resistors 132 of the four Wheatstone bridges 130 are arranged on the substrate 120 of each bending region 213, and the first resistors 131 and the second resistors 132 of the four Wheatstone bridges 130 are arranged on the non-substrate of each bending region 213, that is, four resistors are provided in each bending region. Fig.10 As shown, the four Wheatstone bridges 130 share the same third resistor 133 and fourth resistor 134 , thereby reducing the number of third resistors 133 and fourth resistors 134 and saving costs.

[0081] The bendable device shape detection component 100 provided in the embodiment of the present application utilizes a Wheatstone bridge 130 composed of multiple varistors to achieve accurate detection of the product shape of each bending area 213 of the bendable device with high sensitivity.

[0082] In some embodiments, the bendable device morphology detection component 100 also includes a processor, and the signal output end of the Wheatstone bridge 130 is electrically connected to the signal input end of the processor, and the processor determines the product morphology of the bendable device in the corresponding bending area 213 based on the induced electrical signal output by the Wheatstone bridge 130 and the preset voltage difference information.

[0083] Specifically, the processor compares the induced electrical signal output by the Wheatstone bridge 130 (the induced electrical signal is the voltage difference between the first node and the second node) with the internal preset voltage difference information. If the induced electrical signal output by the Wheatstone bridge 130 is less than the preset voltage difference information, the bendable device is in a flattened state in the corresponding bending area 213; otherwise, the bendable device is in a bent state in the corresponding bending area 213. The preset voltage difference information can be set in advance according to varistors of different precisions.

[0084] The processor can also convert the product form information of the bendable device in the corresponding bending area 213 into numerical information and store it in the memory, wherein the product form includes a flattened state and a bent state, the bent state corresponds to a first numerical value, the flattened state corresponds to a second numerical value, the first numerical value is different from the second numerical value, and the different product forms of the bendable device are characterized by the first numerical value and the second numerical value, so as to facilitate storing the product form information corresponding to each bending area 213 of the bendable device in the memory. For example, the first numerical value is 0 and the second numerical value is 1; for another example, the first numerical value is 1 and the second numerical value is 2.

[0085] The memory stores the corresponding relationship between the induced electrical signals output by each bending area 213 of the bendable device and the product form in a lookup table (Look Up Table, LUT). According to the induced electrical signals (first induced electrical signals or second induced electrical signals) detected by the detection component 100 of each bending area 213 of the bendable device, the product form of each bending area 213 of the bendable device is searched through the lookup table to determine the product form corresponding to each bending area 213 of the bendable device.

[0086] The second aspect of the utility model is as follows Figures 1 to 9 As shown, a display device 200 is provided, comprising at least one bending region 213 , and each of the bending regions 213 is provided with a bendable device form detection component 100 as described in any embodiment of the present application.

[0087] Specifically, the specific technical features and effects of the display device 200 are consistent with the bendable device form detection component 100. By setting the bendable device form detection component 100 described in any embodiment of the present application in each bending area 213 of the display device 200, the state of the display device 200 in each bending area 213 can be accurately detected with high detection sensitivity, and the influence of environmental factors such as temperature and humidity can be eliminated.

[0088] The display device 200 may include a display or a product including a display. The display may be a flat panel display (Flat Panel Display, FPD), a micro display, etc. If the display is divided according to whether the user can see the back of the display, the display may be a transparent display or an opaque display. If the display can be bent or curled, the display may be a flexible display. For example, products including a display may include: computer monitors, televisions, billboards, laser printers with display functions, telephones, mobile phones, personal digital assistants (Personal Digital Assistant, PDA), laptop computers, digital cameras, portable camcorders, wearable devices such as smart watches, smart bracelets, etc.

[0089] In some embodiments, the display device includes a display panel 210 and a shell 220, the display panel 210 includes a main display area 211 and side display areas 212 arranged on both sides of the main display area 211, and the bending area 213 is set at the connection between the main display area 211 and the side display area 212, or the bending area 213 is set on the shell 220.

[0090] Specifically, Figure 1 As shown, taking a wearable device smart watch as an example, the smart watch includes a flexible display panel 210 (such as a flexible OLED screen) and a shell 220 arranged on one side of the display panel 210; wherein the display panel 210 includes a main display area 211 and side display areas 212 located on both sides of the main display area 211, and there is a bending area 213 between the main display area 211 and the side display areas 212 on both sides, or a bending area 213 is arranged on the shell 220, therefore, the smart watch has two bending areas 213. Therefore, the sensing unit and the sensing trigger body 110 are both arranged in the bending area 213 on the display panel 210 or the shell 220, preferably arranged on the shell 220, so that the stacking design of the display panel 210 can remain unchanged, and the structural design of the display panel 210 is not affected. The detection component 100 arranged on the shell 220 can match different display panels 210, thereby realizing multiple matching of the detection component 100 and the display panel 210. When a display panel 210 fails, only the display panel 210 needs to be replaced without replacing the detection component 100 on the shell 220, thereby reducing costs.

[0091] like Figure 2As shown, the housing 220 includes a first component 221 and a second component 222 located on both sides of the first component 221 in each bending area 213. The first component 221 and the second component 222 are hingedly connected, and the product form switching of the smart watch in the corresponding bending area 213 is achieved through the relative movement of the first component 221 and the second component 222. The first component 221 and the second components 222 on both sides form two bending links. Therefore, the housing 220 has a total of four bending links, namely the first bending link 223, the second bending link 224, the third bending link 225 and the fourth bending link 226. In each bending link, two product forms, flattened and bent, can be presented. The smart watch can present 2^4=16 product forms, typically in a completely flattened state. The side view of the smart watch is shown as follows Figure 1 As shown in (a), the fully bent state of the smart watch is Figure 1 (b) shows the rear view of the smart watch. Figure 1 (c) As shown. The two ends of the housing 220 or the display panel 210 of the smart watch are connected with a strap 230 for wearing on the wrist; an electrocardiographic sensor contact part is arranged on the side of the housing 220 away from the display panel 210, which can sense the action potential waveform of cells in different areas of the heart and convert it into a usable output signal. When the watch is worn on the wrist in a fully bent state, the main display area 211 is directly above the wrist; when the watch is taken off and completely flattened, the two side display areas 212 are in the same plane as the main display area 211.

[0092] Figure 3 for Figure 2 A local enlarged view of the first bending link 223, wherein the induction trigger body 110 described in any embodiment of the present application is set at both ends of the first component 221, and the induction unit described in any embodiment of the present application is set on the second component 222, and the precise detection of the product shape at the first bending link 223 is achieved through the cooperation between the induction trigger body 110 and the induction unit.

[0093] Exemplarily, when the sensing unit includes a substrate 120 and a half-bridge Wheatstone bridge 130 disposed on the substrate 120, when a link is not bent, for example, when the first bending link 223 is not bent, the substrate 120 is not deformed, the resistance change ΔR1 of the first resistor 131 and the resistance change ΔR2 of the second resistor 132 are both 0, that is, ΔR1=ΔR2=0, at this time the bridge is balanced, and an induced electrical signal (that is, the output voltage difference signal ΔV=0 between the first node and the second node) is output, and the processor compares the output voltage difference signal ΔV with the preset voltage difference information ΔVstd, and if ΔV<ΔVstd, the result is recorded as 0.

[0094] When the first bending link 223 is bent, the substrate 120 is deformed, and the resistance change of the first resistor 131 is negatively correlated with the resistance change of the second resistor 132, that is, ΔR1=-ΔR2, and an induced electrical signal is output (that is, the output voltage difference signal ΔV between the first node and the second node=│VCC*ΔR1 / 2R1│). The processor compares the output voltage difference signal ΔV with the preset voltage difference information ΔVstd. If ΔV>ΔVstd, the result is recorded as 1.

[0095] As shown in Table 1 and Table 2, the smart watch has four bending links, each link has two states: bending and not bending, and can present 2^4=16 product forms in total. The corresponding relationship between the induced electrical signals output by the four bending links of the smart watch and the product form is stored in a lookup table in the memory. The product form can be determined by searching the bending states of the four links through the lookup table LUT.

[0096] Table 1

[0097] Induction electrical signal Bending chain links Corresponding varistor ΔV1=1 223 1131,1132 ΔV2=1 224 2131,2232 ΔV3=1 225 3131,3132 ΔV4=1 226 4131,4132

[0098] In Table 1, ΔV1 is the induced electrical signal output by the display device at the first bending link 223, ΔV2 is the induced electrical signal output by the display device at the second bending link 224, and ΔV3 is the induced electrical signal output by the display device at the third bending link 225; 1131 and 1132 are the resistance values ​​of the first resistor and the second resistor of the display device at the first bending link 223, respectively; 2131 and 2132 are the resistance values ​​of the first resistor and the second resistor of the display device at the second bending link 224, respectively; 3131 and 3132 are the resistance values ​​of the first resistor and the second resistor of the display device at the third bending link 225, respectively; and 4131 and 4132 are the resistance values ​​of the first resistor and the second resistor of the display device at the fourth bending link 225, respectively.

[0099] Table 2 Lookup table

[0100]

[0101] Among them, the mobile phone form refers to the display device being in a completely flat state, and the watch form refers to the display device being in a completely bent state.

[0102] Among them, Fig.11 As shown, the bendable device form detection component 100 also includes a main control module 330, a driving module 350 and a display panel 210. The signal output end of the processor 310 is electrically connected to the signal input end of the main control module 330, and the main control module 330 is electrically connected to the display panel 210 through the driving module 350.

[0103] Specifically, the processor 310 controls the display area of ​​the display panel 210 through the main control module 330 according to the product form of the display device in each bending area detected by the detection component 100.

[0104] For example, when the display device is worn daily, the first bending link 223, the second bending link 224, the third bending link 225 and the fourth bending link 226 can be bent to put the display device in a fully bent watch state. In order to reduce unnecessary power consumption, the main control module 330 controls the driving module 350 to enable the display panel 210 to only turn on the display of a certain display area, such as only displaying daily information such as time and weather in the main display area 211, and closing the bending area 213 and the two side display areas 212 to reduce power consumption. Of course, a prompt message can also be output to the display panel 210 to prompt the user whether to set the display in a low-power state. If so, only the partial area selected by the user is displayed. If not, no partial display is performed. Of course, the prompt message can also be not output, and the default state can be set to always maximize the display.

[0105] When switching the bending state, the main control module 330 controls the driving module 350 to make the display panel 210 automatically display the bent part, for example, when fully unfolded, it switches to the fully displayed mobile phone display state to maximize the display.

[0106] like Fig.11 As shown, the bendable device form detection component 100 also includes an NFC module 340 and / or an NFC module 340 , and the signal output end of the main control module 330 is electrically connected to the NFC module 340 and / or the NFC module 340 .

[0107] Specifically, the processor 310 controls the NFC module 340 and / or the NFC module 340 to perform corresponding operations through the main control module 330 according to the product form of the display device in each bending area detected by the detection component 100.

[0108] For example, when the display device switches from other states to the intermediate bending state in a certain bending area, such as Fig.12 As shown, it is not a completely unfolded state or a completely bent state. The main control module 330 can control the Camera module 360 ​​and the NFC module 340 to perform specific operations, such as taking photos, shooting videos or NFC reading, etc., which are not limited here.

[0109] like Fig.11 As shown, the bendable device form detection component 100 further includes a power module 300 , which supplies power to the Wheatstone bridge, the processor 310 , the main control module 330 , and the like.

[0110] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A bendable device morphology detection component, characterized in that: It comprises a sensing unit and a sensing trigger body, wherein the sensing unit and the sensing trigger body are arranged in a bending area of ​​the bendable device, and the bending area has a first flattened state and a second bent state; In the first state, the sensing unit and the sensing trigger body are separated, and the sensing unit is configured to output a first sensing electrical signal in a non-deformed state; In the second state, the induction trigger body contacts the induction unit, and the induction trigger body squeezes the induction unit to deform, and the induction unit is configured to output a second induction electrical signal in the deformed state; wherein the first induction electrical signal is different from the second induction electrical signal.

2. The bendable device morphology detection component according to claim 1, characterized in that: It also includes a guide groove, the sensing unit is arranged in the guide groove, and there is a gap between the sensing unit and the groove bottom of the guide groove; The induction trigger body is at least partially located in the guide groove.

3. The bendable device morphology detection component according to claim 2, characterized in that: A first positioning portion is provided in the guide groove, and the sensing unit is located between the first positioning portion and the groove bottom of the guide groove; The induction trigger body is provided with a second positioning portion. In the second state, the first positioning portion is positioned and matched with the second positioning portion to limit the induction trigger body from moving toward the induction unit.

4. The bendable device morphology detection component according to claim 2, characterized in that: The guide groove is an arc-shaped groove, and the induction trigger body includes an arc-shaped piece.

5. The bendable device morphology detection component according to claim 4, characterized in that: The bending area includes a first component and a second component connected by a hinge, the guide groove is arranged on the opposite side of one of the first component and the second component, and the arc-shaped member is arranged on the opposite side of the other component.

6. The bendable device morphology detection component according to claim 1, characterized in that: The sensing unit includes a substrate and a Wheatstone bridge arranged on the substrate.

7. The bendable device morphology detection component according to claim 6, characterized in that: The Wheatstone bridge includes a first resistor, a second resistor, a third resistor and a fourth resistor; wherein the first resistor and the second resistor are connected in series to form a first series loop, the third resistor and the fourth resistor are connected in series to form a second series loop, and the first series loop and the second series loop are connected in parallel to form a Wheatstone bridge.

8. The bendable device morphology detection component according to claim 7, characterized in that: The first resistor and the second resistor are arranged on the substrate, the resistance value of one of the first resistor and the second resistor increases, the resistance value of the other resistor decreases, the resistance value changes of the first resistor and the second resistor are the same, and the third resistor and the fourth resistor are fixed value resistors; Alternatively, the first resistor is disposed on the substrate, the first resistor is a variable resistance resistor, and the second resistor, the third resistor and the fourth resistor are fixed resistance resistors; Alternatively, the first resistor, the second resistor, the third resistor and the fourth resistor are all arranged on the substrate, the first resistor and the second resistor are symmetrically arranged on both sides of the substrate, the third resistor and the fourth resistor are symmetrically arranged on both sides of the substrate, the first resistor and the fourth resistor are located on the same side of the substrate, the second resistor and the third resistor are located on the other side of the substrate, and the first resistor, the second resistor, the third resistor and the fourth resistor have the same resistance change.

9. The bendable device form detection component according to claim 7, characterized in that: The bendable device has a plurality of bending regions, a plurality of first series circuits corresponding to the Wheatstone bridges of the plurality of bending regions are connected in parallel, and the plurality of parallel-connected first series circuits are connected in parallel with at least one second series circuit.

10. A display device, characterized in that: It comprises at least one bending area, and each of the bending areas is provided with a bendable device morphology detection component as described in any one of claims 1-9.

11. The display device according to claim 10, characterized in that: The display device includes a display panel and a shell, the display panel includes a main display area and side display areas arranged on both sides of the main display area, the bending area is arranged at the connection between the main display area and the side display area or the bending area is arranged on the shell.

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