Position sensor and position detection method

Abstract

The embodiment of the invention provides a position sensor and a position detection method, and the position sensor comprises the components of a first flexible substrate which is provided with a first end and a second end which are oppositely arranged; the broken-line-shaped resistive film and the strip-shaped resistive film are arranged on the top side of the first flexible substrate side by side at intervals, the ends, close to the first end, of the broken-line-shaped resistive film and the strip-shaped resistive film are connected with the resistance detection circuit, and the resistance detection circuit is used for detecting the resistance value of the position sensor. The end parts, close to the second end, of the broken-line-shaped resistive film and the strip-shaped resistive film are connected with each other; the second flexible substrate is arranged above the first flexible substrate at an interval, and the extension direction of the second flexible substrate is consistent with that of the first flexible substrate; and the plurality of grids are arranged on the bottom side of the second flexible substrate, and the grids are distributed at intervals along the extension direction of the second flexible substrate. The embodiment of the invention can reduce the manufacturing process cost and improve the position detection efficiency.

Description

Technical Field

[0001] This application relates to, but is not limited to, the field of sensor technology, and in particular, to a position sensor and a position detection method. Background Art

[0002] In related technologies, position detection is achieved through a flexible pressure sensor. Usually, multiple flexible pressure sensors are combined into an array device, and each sensor in the array device is detected one by one through a row-column scanning method to determine the position of the force application point. However, the lead structure of such an array device is complex, and there is a problem of high manufacturing process cost. In addition, the row-column scanning method requires multiple measurements to determine the force application point, resulting in low position detection efficiency and difficulty in meeting the need for rapid position identification. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail in this document. This overview is not intended to limit the scope of protection of the claims.

[0004] Embodiments of this application provide a position sensor and a position detection method, which can reduce the manufacturing process cost and improve the position detection efficiency.

[0005] To achieve the above object, a first aspect of the embodiments of this application provides a position sensor, including:

[0006] A first flexible substrate having a first end and a second end disposed opposite to each other;

[0007] A zigzag resistive film and a strip resistive film are disposed side by side and spaced apart on the top side of the first flexible substrate. The end portions of the zigzag resistive film and the strip resistive film close to the first end are respectively connected to a resistance detection circuit, and the resistance detection circuit is used to detect the resistance value of the position sensor. The end portions of the zigzag resistive film and the strip resistive film close to the second end are connected to each other;

[0008] A second flexible substrate is disposed above the first flexible substrate at an interval, and the second flexible substrate is consistent with the first flexible substrate in the extending direction;

[0009] A plurality of gates are disposed on the bottom side of the second flexible substrate, and each of the gates is distributed at intervals along the extending direction of the second flexible substrate.

[0010] In a possible implementation manner, the resistance value of the position sensor and the touch distance of the position sensor satisfy the following relationship:

[0011]

[0012] Wherein, L is the touch distance, R is the resistance value of the position sensor, R0 is the resistance value of the strip-shaped resistive film, and L0 is the length of the strip-shaped resistive film.

[0013] In a possible implementation, the conductivity of the zigzag resistive film is greater than that of the strip-shaped resistive film, the conductivity of the gate is greater than that of the strip-shaped resistive film, the resistance distribution of the zigzag resistive film is uniform, the line resistance deviation of any region in the zigzag resistive film is less than ±5%, the resistance distribution of the strip-shaped resistive film is uniform, and the line resistance deviation of any region in the strip-shaped resistive film is less than ±5%.

[0014] In a possible implementation, the zigzag resistive film is a composite film prepared from at least one of carbon fiber, carbon nanotube, graphene, porous carbon, nano silver powder, nano copper powder or nano gold powder and a polymer resin, or the zigzag resistive film is one of copper foil, gold foil, silver foil, aluminum foil and platinum foil;

[0015] The strip-shaped resistive film is a composite film prepared from at least one of carbon fiber, carbon nanotube, graphene, porous carbon, nano silver powder, nano copper powder or nano gold powder and a polymer resin;

[0016] The polymer resin includes at least one of acrylic acid, polyurethane, polyimide, phenolic resin, urea-formaldehyde resin, epoxy resin or unsaturated resin.

[0017] In a possible implementation, the extending directions of the respective gates are perpendicular to the extending direction of the second flexible substrate, and the gate is a composite film prepared from at least one of carbon fiber, carbon nanotube, graphene, porous carbon, nano silver powder, nano copper powder or nano gold powder and the polymer resin, or the gate is one of copper foil, gold foil, silver foil, aluminum foil and platinum foil.

[0018] In a possible implementation, the position sensor further includes an isolation layer made of an elastic material, the isolation layer is disposed on the top side of the first flexible substrate, and the bottom side of the second flexible substrate is connected to the isolation layer.

[0019] In a possible implementation, when an external force acts vertically on the first flexible substrate or the second flexible substrate, the thickness of the isolation layer decreases, so that the gate is simultaneously in contact with the zigzag resistive film and the strip-shaped resistive film to reduce the resistance value of the position sensor.

[0020] In a possible implementation, the position sensor includes at least one resistive film group, and the resistive film group includes a plurality of the zigzag resistive films and a plurality of the strip-shaped resistive films;

[0021] In any one of the resistor film groups, the zigzag resistor films and the strip-shaped resistor films are arranged alternately, the zigzag resistor films are connected end to end with the adjacent strip-shaped resistor films, the gate contacts at most two of the strip-shaped resistor films and one zigzag resistor film under pressure, the first end of the resistor film group is connected to the resistance detection circuit through a first metal electrode, the zigzag resistor film for contacting the gate is connected to the resistance detection circuit through a second metal electrode, and the second end of the resistor film group is connected to the resistance detection circuit through a third metal electrode;

[0022] When there are multiple resistor film groups, the multiple resistor film groups share the second metal electrode.

[0023] To achieve the above object, a second aspect of the embodiments of the present application provides a position detection method, including:

[0024] When the second flexible substrate is not pressed, obtain a first resistance value of the position sensor described in the first aspect above, where the first resistance value is detected by a resistance detection circuit;

[0025] When any position where a gate is located on the second flexible substrate is pressed, obtain a second resistance value of the position sensor, where the second resistance value is detected by the resistance detection circuit;

[0026] Determine a target pressing position on the second flexible substrate according to the difference between the first resistance value and the second resistance value.

[0027] In a possible implementation manner, the position detection method further includes:

[0028] Respectively obtain the second resistance values when any position where a gate is located on the second flexible substrate is pressed, and determine the target pressing positions corresponding to the second resistance values;

[0029] Associate and store each of the second resistance values with the corresponding target pressing position;

[0030] When the second flexible substrate is pressed again, obtain a third resistance value of the position sensor, where the third resistance value is detected by the resistance detection circuit;

[0031] Retrieve each of the second resistance values stored based on the third resistance value, and when the second resistance value identical to the third resistance value is retrieved, display the target pressing position corresponding to the retrieved second resistance value.

[0032] The embodiments of the present application at least include the following beneficial effects: By providing a first flexible substrate and a second flexible substrate as the support parts of the position sensor, then arranging the zigzag resistive film and the strip resistive film side by side and at intervals on the top side of the first flexible substrate, and arranging a plurality of gates on the bottom side of the second flexible substrate. Since the second flexible substrate is arranged at intervals above the first flexible substrate, when the position sensor is not pressed, each gate does not contact the zigzag resistive film and the strip resistive film. When the position sensor is pressed, some gates can simultaneously contact the zigzag resistive film and the strip resistive film. By defining that the ends of the zigzag resistive film and the strip resistive film close to the second ends are connected to each other, the extension direction of the second flexible substrate is the same as that of the first flexible substrate, and each gate is distributed at intervals along the extension direction of the second flexible substrate. The position sensor only needs to connect the ends of the zigzag resistive film and the strip resistive film close to the first ends to the resistance detection circuit through two leads, which can reduce the manufacturing process cost. Moreover, by detecting the resistance value of the position sensor through the resistance detection circuit, the difference between the resistance values before and after the position sensor is pressed can be determined. Furthermore, the pressing position of the position sensor can be determined through the difference between the resistance values before and after being pressed, which can improve the position detection efficiency.

[0033] Other features and advantages of the present application will be described in the following specification. And, partly, they will be obvious from the specification, or can be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures specifically pointed out in the specification, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification. They are used together with the embodiments of the present application to explain the technical solutions of the present application, and do not constitute a limitation to the technical solutions of the present application.

[0035] Figure 1 An optional structural schematic diagram of the position sensor provided by the embodiment of the present application;

[0036] Figure 2 An optional structural schematic diagram of the first flexible substrate provided by the embodiment of the present application;

[0037] Figure 3 An optional structural schematic diagram of the second flexible substrate provided by the embodiment of the present application;

[0038] Figure 4 An optional side view of the position sensor provided by the embodiment of the present application;

[0039] Figure 5 An optional relationship diagram between the touch distance and the resistance value of the position sensor provided by the embodiment of the present application;

[0040] Figure 6 An optional structural schematic diagram provided by an embodiment of the present application when the position sensor is not pressed;

[0041] Figure 7 An optional structural schematic diagram provided by an embodiment of the present application when the position sensor is pressed;

[0042] Figure 8 Another optional structural schematic diagram of the position sensor provided by an embodiment of the present application;

[0043] Figure 9 An optional structural schematic diagram of the numeric keypad provided by an embodiment of the present application;

[0044] Figure 10 An optional flowchart schematic diagram of the position detection method provided by an embodiment of the present application;

[0045] Figure 11 An optional hardware structural schematic diagram of the electronic device provided by an embodiment of the present application. Detailed implementation manners

[0046] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0047] It should be noted that in each specific implementation manner of the present application, when it comes to performing relevant processing based on data related to the characteristics of the target object, such as target object attribute information or attribute information set, etc., the permission or consent of the target object will be obtained first. Moreover, the collection, use and processing of these data will comply with relevant laws, regulations and standards. Among them, the target object may be a user. In addition, when an embodiment of the present application needs to obtain target object attribute information, it will obtain the separate permission or separate consent of the target object through methods such as pop-up windows or jumping to a confirmation page. After clearly obtaining the separate permission or separate consent of the target object, the necessary target object-related data for the normal operation of the embodiment of the present application will be obtained.

[0048] In the description of the present application, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number.

[0049] It should be noted that although the functional modules are divided in the schematic diagram of the device and the logical sequence is shown in the flowchart, in some cases, the steps shown or described can be executed in a different module division in the device or a different order in the flowchart. Terms such as "first" and "second" in the specification, claims, or the above-mentioned drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0050] In the related art, position detection is achieved through a flexible pressure sensor. Usually, multiple flexible pressure sensors are combined into an array device, and each sensor in the array device is detected one by one through row-column scanning to determine the position of the force application point. However, such an array device has a complex lead structure and a large manufacturing process cost. In addition, the row-column scanning method requires multiple measurements to determine the force application point, resulting in a low position detection efficiency and making it difficult to meet the requirement of quickly identifying the position.

[0051] To address the problems of high manufacturing process cost and low position detection efficiency, the present application provides a position sensor and a position detection method, which can reduce the manufacturing process cost and improve the position detection efficiency.

[0052] The position sensor and the position detection method provided in the embodiments of the present application are specifically described through the following embodiments. First, the position sensor in the embodiments of the present application is described.

[0053] The following further elaborates on the embodiments of the present application with reference to the accompanying drawings.

[0054] Refer to Figures 1 to 4 , Figure 1 which is an optional schematic structural diagram of the position sensor provided in the embodiments of the present application, Figure 2 which is an optional schematic structural diagram of the first flexible substrate provided in the embodiments of the present application, Figure 3 which is an optional schematic structural diagram of the second flexible substrate provided in the embodiments of the present application, Figure 4 which is an optional side schematic diagram of the position sensor provided in the embodiments of the present application. The embodiments of the present application provide a position sensor, including:

[0055] A first flexible substrate 110 having a first end and a second end disposed opposite to each other;

[0056] A zigzag resistive film 210 and a strip resistive film 220 are arranged side by side and spaced apart on the top side of the first flexible substrate 110. The end portions of the zigzag resistive film 210 and the strip resistive film 220 close to the first end are respectively connected to a resistance detection circuit, and the resistance detection circuit is used to detect the resistance value of the position sensor. The end portions of the zigzag resistive film 210 and the strip resistive film 220 close to the second end are connected to each other;

[0057] A second flexible substrate 120 is disposed above the first flexible substrate 110 at intervals, and the second flexible substrate 120 is consistent with the first flexible substrate 110 in the extending direction.

[0058] A plurality of gates 230 are disposed on the bottom side of the second flexible substrate 120, and the respective gates 230 are distributed at intervals along the extending direction of the second flexible substrate 120.

[0059] Among them, the first flexible substrate 110 is an insulator, and the preparation material of the first flexible substrate 110 may include at least one of materials such as polyethylene terephthalate, polyimide, polydimethylsiloxane or polyurethane. Similar to the first flexible substrate 110, the second flexible substrate 120 is also an insulator, and the preparation material of the second flexible substrate 120 may also include at least one of materials such as polyethylene terephthalate, polyimide, polydimethylsiloxane or polyurethane.

[0060] Specifically, the resistance detection circuit can supply current and detect voltage to the ends of the zigzag resistance film 210 and the strip-shaped resistance film 220 close to the first ends respectively. For example, the end of the strip-shaped resistance film 220 close to the first end is connected to the positive port of the resistance detection circuit, and the end of the zigzag resistance film 210 close to the first end is connected to the negative port of the resistance detection circuit, so that the resistance detection circuit can detect the resistance value of the position sensor, that is, the equivalent resistance of the position sensor is detected through the resistance detection circuit.

[0061] Specifically, the sensitive layer of the position sensor includes the first flexible substrate 110, the zigzag resistance film 210 and the strip-shaped resistance film 220, and the electrode layer of the position sensor includes the second flexible substrate 120 and a plurality of gates 230.

[0062] It should be noted that the zigzag resistance film 210 may have a strip-shaped portion, and the strip-shaped portion of the zigzag resistance film 210, the strip-shaped resistance film 220 and the first flexible substrate 110 are consistent in the extending direction, so the strip-shaped portion of the zigzag resistance film 210 and the strip-shaped resistance film 220 are parallel to each other.

[0063] Specifically, Figure 1 The shown position sensor is the structure of the remaining part after hiding the second flexible substrate 120. The zigzag resistance film 210 and the strip-shaped resistance film 220 can be disposed on the top side of the first flexible substrate 110 by printing, and the gates 230 can be disposed on the bottom side of the second flexible substrate 120 by printing; the top surfaces of the first flexible substrate 110 and the second flexible substrate 120 may both be rectangular, and the projection of the first flexible substrate 110 on the second flexible substrate 120 completely coincides with the top surface of the second flexible substrate 120.

[0064] It should be noted that, in order to ensure that when the position sensor is pressed, the gate 230 can contact the zigzag resistor film 210 and the strip resistor film 220 simultaneously, it can be required that the projections of each gate 230 on the first flexible substrate 110 coincide with the projection of the zigzag resistor film 210 on the first flexible substrate 110 at least partially, and the projections of each gate 230 on the first flexible substrate 110 coincide with the projection of the strip resistor film 220 on the first flexible substrate 110 at least partially.

[0065] Based on this, by providing the first flexible substrate 110 and the second flexible substrate 120 as the support parts of the position sensor, then arranging the zigzag resistor film 210 and the strip resistor film 220 side by side and at intervals on the top side of the first flexible substrate 110, and arranging a plurality of gates 230 on the bottom side of the second flexible substrate 120. Since the second flexible substrate 120 is arranged at intervals above the first flexible substrate 110, when the position sensor is not pressed, each gate 230 does not contact the zigzag resistor film 210 and the strip resistor film 220. When the position sensor is pressed, some gates 230 can contact the zigzag resistor film 210 and the strip resistor film 220 simultaneously. By defining that the ends of the zigzag resistor film 210 and the strip resistor film 220 close to the second ends are connected to each other, the extending direction of the second flexible substrate 120 is the same as that of the first flexible substrate 110, and each gate 230 is distributed at intervals along the extending direction of the second flexible substrate 120. The position sensor only needs to connect the ends of the zigzag resistor film 210 and the strip resistor film 220 close to the first ends to the resistance detection circuit through two leads, which can reduce the manufacturing process cost. Moreover, by detecting the resistance value of the position sensor through the resistance detection circuit, the difference between the resistance values before and after the position sensor is pressed can be determined. Furthermore, the pressing position of the position sensor can be determined through the difference between the resistance values before and after being pressed, which can improve the position detection efficiency.

[0066] It should be noted that when the position sensor is not pressed, although each gate 230 does not contact the zigzag resistor film 210 and the strip resistor film 220, the ends of the zigzag resistor film 210 and the strip resistor film 220 close to the second ends are connected to each other. Therefore, the resistance detection circuit can detect the resistance value of the position sensor before being pressed, that is, detect the initial equivalent resistance of the position sensor. At this time, the initial equivalent resistance of the position sensor is the sum of the resistance values of the zigzag resistor film 210 and the strip resistor film 220 connected in series in sequence.

[0067] It can be understood that when the first flexible substrate 110 or the second flexible substrate 120 is pressed, it will deform. Pressing the position sensor is equivalent to pressing the first flexible substrate 110 or the second flexible substrate 120. When the position sensor is pressed, some of the gates 230 can simultaneously contact the zigzag resistive film 210 and the strip resistive film 220, causing the equivalent resistance of the position sensor to change. The resistance detection circuit can detect the resistance value when the position sensor is pressed, that is, detect the equivalent resistance after the change of the position sensor. When different positions where the gates 230 are located are pressed, the degree of change of the equivalent resistance of the position sensor is different. The difference between the resistance values before and after the position sensor is pressed can characterize the degree of change of the equivalent resistance of the position sensor. Therefore, the pressing position of the position sensor can be determined by the difference between the resistance values before and after the position sensor is pressed.

[0068] It should be noted that when a pressure towards the first flexible substrate 110 is applied to any position where a gate 230 on the second flexible substrate 120 is located, the gate 230 at that position moves towards the first flexible substrate 110. Since the projections of the respective gates 230 on the first flexible substrate 110 at least partially coincide with the projection of the zigzag resistive film 210 on the first flexible substrate 110, and the projections of the respective gates 230 on the first flexible substrate 110 at least partially coincide with the projection of the strip resistive film 220 on the first flexible substrate 110, the gate 230 at that position will simultaneously contact the zigzag resistive film 210 and the strip resistive film 220, ensuring that the equivalent resistance of the position sensor can change.

[0069] In a possible implementation, referring again to Figure 2 , on the top side of the first flexible substrate 110, there are a first metal electrode 310 and a second metal electrode 320 distributed at intervals. The end of the strip resistive film 220 near the first end is connected to the resistance detection circuit through the first metal electrode 310, and the end of the zigzag resistive film 210 near the first end is connected to the resistance detection circuit through the second metal electrode 320. The polarities of the first metal electrode 310 and the second metal electrode 320 are opposite. For example, the first metal electrode 310 is the positive electrode and the second metal electrode 320 is the negative electrode.

[0070] In a possible implementation, the resistance value of the position sensor and the touch distance of the position sensor satisfy the following relationship:

[0071]

[0072] where L is the touch distance, R is the resistance value of the position sensor, R0 is the resistance value of the strip resistive film 220, and L0 is the length of the strip resistive film 220.

[0073] It can be understood that when the conductivity of the zigzag resistance film 210 is much greater than that of the strip-shaped resistance film 220, and the conductivity of the gate 230 is much greater than that of the strip-shaped resistance film 220, the resistance values of the zigzag resistance film 210 and the gate 230 can be ignored when determining the resistance value of the position sensor, and it can be determined that the touch distance of the position sensor is linearly related to the resistance value of the position sensor. For details, please refer to Figure 5 , Figure 5 which is an optional relationship diagram between the touch distance and the resistance value of the position sensor provided by the embodiment of the present application. The touch distance is the distance between the target pressing position of the position sensor and the end of the strip-shaped resistance film 220 close to the first end.

[0074] For example, referring to Figure 6 , Figure 6 which is an optional structural schematic diagram of the position sensor when it is not pressed provided by the embodiment of the present application. The arrow in the figure is used to indicate the direction of current flow. Assuming that the conductivity of the strip-shaped resistance film 220 is ρ, the cross-sectional area is S, and the length is L0, then through measurement, it can be determined that the equivalent resistance when the position sensor is not pressed is R0 is also the resistance of the strip-shaped resistance film 220, and the difference between the resistance values before and after being pressed can be represented by the ratio of the resistance value when the position sensor is pressed to the resistance value when the position sensor is not pressed.

[0075] Then, referring to Figure 7 , Figure 7 which is an optional structural schematic diagram of the position sensor when it is pressed provided by the embodiment of the present application. The arrow in the figure is used to indicate the direction of current flow. The positions P1 to P9 of the strip-shaped resistance film 220 are distributed in sequence from the first end to the second end. Assuming that the position P5 of the strip-shaped resistance film 220 in Figure 7 contacts the gate 230, then through measurement, it can be determined that the equivalent resistance when the position sensor is pressed is It can be calculated that the ratio of the resistance value when the position sensor is pressed to the resistance value when the position sensor is not pressed is 5 / 10. Then it can be determined that the target pressing position is the position where it moves 5L0 / 10 along the extension direction of the strip-shaped resistance film 220 starting from the end of the strip-shaped resistance film 220 close to the first end. The target pressing position is the position where the pressed gate 230 is located;

[0076] Exemplarily, assuming that the length L0 of the strip-shaped resistance film 220 is 10 cm, then 5L0 / 10 is 5 cm, that is, the target pressing position is the position where it moves 5 cm along the extension direction of the strip-shaped resistance film 220 starting from the end of the strip-shaped resistance film 220 close to the first end.

[0077] It should be noted that since the zigzag resistive film 210 and the strip resistive film 220 are in series when the position sensor is not pressed, the resistance detection circuit can detect the equivalent resistance R0 when the position sensor is not pressed. The equivalent resistance R0 can be used as a reference resistance. Then, after the resistance detection circuit can detect the equivalent resistance R when the position sensor is pressed, the target pressing position can be directly calculated through the ratio between R and R0. Compared with determining the force application point through multiple measurements, when the position sensor is pressed, the target pressing position can be determined only through a single measurement, which can improve the detection efficiency of the position sensor.

[0078] It should be noted that when the resistance values of the zigzag resistive film 210 and the gate 230 are ignored, compared with the equivalent resistance when the position sensor is not pressed, when the gate 230 contacts both the zigzag resistive film 210 and the strip resistive film 220 at the same time, the equivalent resistance of the position sensor can be significantly reduced.

[0079] In a possible implementation, the conductivity of the zigzag resistive film 210 is greater than that of the strip resistive film 220, the conductivity of the gate 230 is greater than that of the strip resistive film 220, the resistance of the zigzag resistive film 210 is evenly distributed, the line resistance deviation of any region in the zigzag resistive film 210 is less than ±5%, the resistance of the strip resistive film 220 is evenly distributed, and the line resistance deviation of any region in the strip resistive film 220 is less than ±5%.

[0080] It can be understood that since the conductivity of the zigzag resistive film 210 is greater than that of the strip resistive film 220, and the conductivity of the gate 230 is greater than that of the strip resistive film 220, and when the position sensor is not pressed, each gate 230 does not contact the zigzag resistive film 210 and the strip resistive film 220, and the equivalent resistance of the position sensor is the total resistance of the zigzag resistive film 210 and the strip resistive film 220. Therefore, the resistance value of the strip resistive film 220 is the main factor affecting the equivalent resistance of the position sensor. When the position sensor is pressed, some gates 230 can simultaneously contact the zigzag resistive film 210 and the strip resistive film 220, which is equivalent to shunting the current through the contacted gates 230, reducing the equivalent resistance of the position sensor. Especially when the conductivity of the gate 230 is much greater than that of the strip resistive film 220, and the conductivity of the zigzag resistive film 210 is much greater than that of the strip resistive film 220, it is equivalent to short-circuiting some areas of the strip resistive film 220, making the resistance value of the effective conduction path in the strip resistive film 220 the main factor affecting the equivalent resistance of the position sensor. Therefore, the difference between the resistance values before and after being pressed is mainly determined by the change in the resistance value of the effective conduction path in the strip resistive film 220. Also, since the resistance distributions of the zigzag resistive film 210, the strip resistive film 220, and the gate 230 are uniform, as the pressed position of the position sensor moves uniformly, the difference between the resistance values before and after being pressed will change uniformly, and the pressed gate 230 can be accurately located through the difference between the resistance values before and after being pressed, and then the pressed position of the position sensor can be accurately determined.

[0081] Specifically, assume that the ratio of the conductivity of the zigzag resistive film 210 to the conductivity of the strip resistive film 220 is greater than or equal to K, and the ratio of the conductivity of the gate 230 to the conductivity of the strip resistive film 220 is greater than or equal to K. For example, when K is greater than or equal to 100, the conductivity of the zigzag resistive film 210 is much greater than that of the strip resistive film 220, and the conductivity of the gate 230 is much greater than that of the strip resistive film 220. At this time, the equivalent resistance of the position sensor is the resistance value of the effective conduction path in the strip resistive film 220, and the resistance values of the zigzag resistive film 210 and the gate 230 can be ignored, that is, both the zigzag resistive film 210 and the gate 230 are low-resistance films, and the strip resistive film 220 is a high-resistance film. The conductivity difference between the high-resistance film and the low-resistance film is usually 2 orders of magnitude or more.

[0082] In a possible implementation manner, the zigzag resistive film 210 is a composite film prepared by at least one of carbon fiber, carbon nanotube, graphene, porous carbon, nano silver powder, nano copper powder, or nano gold powder and a polymer resin, or the zigzag resistive film 210 is one of copper foil, gold foil, silver foil, aluminum foil, and platinum foil;

[0083] The strip-shaped resistive film 220 is a composite film prepared from at least one of carbon fiber, carbon nanotube, graphene, porous carbon, nano silver powder, nano copper powder or nano gold powder and a polymer resin;

[0084] The polymer resin includes at least one of acrylic acid, polyurethane, polyimide, phenolic resin, urea-formaldehyde resin, epoxy resin or unsaturated resin.

[0085] It can be understood that by defining the preparation materials of the zigzag resistive film 210 and the strip-shaped resistive film 220, it is also possible to ensure that the zigzag resistive film 210 has a sufficiently large conductivity and the strip-shaped resistive film 220 has a sufficiently small conductivity, so that the conductivity of the zigzag resistive film 210 is much greater than that of the strip-shaped resistive film 220, which can further improve the detection effect of the position sensor.

[0086] In a possible implementation, referring again to Figure 1 and Figure 3 , the extending directions of the respective gates 230 are perpendicular to the extending direction of the second flexible substrate 120. The gate 230 is a composite film prepared from at least one of carbon fiber, carbon nanotube, graphene, porous carbon, nano silver powder, nano copper powder or nano gold powder and a polymer resin, or the gate 230 is one of copper foil, gold foil, silver foil, aluminum foil and platinum foil.

[0087] Specifically, by defining the preparation material of the gate 230, it is also possible to ensure that the gate 230 has a sufficiently large conductivity, so that the conductivity of the gate 230 is much greater than that of the strip-shaped resistive film 220, which can further improve the detection effect of the position sensor.

[0088] It can be understood that since the extending directions of the respective gates 230 are perpendicular to the extending direction of the second flexible substrate 120, the extending direction of the gate 230 is perpendicular to the extending direction of the strip portion of the zigzag resistive film 210, and the extending direction of the gate 230 is perpendicular to the extending direction of the strip-shaped resistive film 220, which can ensure that the respective gates 230 are not connected. Moreover, when a position where any one of the gates 230 is located is pressed, assuming that the contact point between the pressed gate 230 and the strip portion of the zigzag resistive film 210 is determined as the first contact point, and the contact point between the pressed gate 230 and the strip-shaped resistive film 220 is determined as the second contact point, then it can be ensured that the distance between the first contact point and the second contact point is equal to the shortest distance between the first contact point and the strip-shaped resistive film 220, so that the first contact point and the second contact point are as close as possible, that is, the first contact point and the second contact point are within the same relatively small pressing area, thereby improving the accuracy of the target pressing position determined by the position sensor.

[0089] In a possible implementation, referring again to Figure 1 and Figure 3 , the lengths of the respective gates 230 are the same, and the respective gates 230 are evenly distributed on the bottom side of the second flexible substrate 120.

[0090] It can be understood that since the lengths of the respective gates 230 are the same, the pressing ranges of the respective selectable pressed positions in the position sensor are the same. Also, since the respective gates 230 are evenly distributed on the bottom side of the second flexible substrate 120, the respective selectable pressed positions in the position sensor are evenly distributed, which helps to accurately detect different target pressed positions of the position sensor and can also avoid misoperations.

[0091] It should be noted that the recognition resolution of the position sensor is positively correlated with the distribution density of the gates 230, and the recognition resolution of the position sensor can reach 1 um.

[0092] In a possible implementation, referring again to Figure 1 and Figure 2 , the position sensor further includes an isolation layer 240 made of an elastic material. The isolation layer 240 is disposed on the top side of the first flexible substrate 110, and the bottom side of the second flexible substrate 120 is connected to the isolation layer 240.

[0093] Specifically, the thickness of each position in the isolation layer 240 is the same, and the thickness of the isolation layer 240 is greater than the sum of the thicknesses of the zigzag resistive film 210 and the gates 230.

[0094] It can be understood that since the isolation layer 240 is disposed on the top side of the first flexible substrate 110 and the bottom side of the second flexible substrate 120 is connected to the isolation layer 240, the first flexible substrate 110 and the second flexible substrate 120 are connected through the isolation layer 240. Since the thickness of each position in the isolation layer 240 is the same and the thickness of the isolation layer 240 is greater than the sum of the thicknesses of the zigzag resistive film 210 and the gates 230, when the position sensor is not pressed, there is a gap between the zigzag resistive film 210 and the gates 230 under the isolation of the isolation layer 240, and there is also a gap between the strip resistive film 220 and the gates 230, ensuring that each gate 230 does not contact the zigzag resistive film 210 and the strip resistive film 220.

[0095] In a possible implementation, referring again to Figures 1 to 4 , when an external force acts perpendicularly on the first flexible substrate 110 or the second flexible substrate 120, the thickness of the isolation layer 240 decreases, causing the gates 230 to contact both the zigzag resistive film 210 and the strip resistive film 220 simultaneously, so as to reduce the resistance value of the position sensor.

[0096] It can be understood that since the isolation layer 240 is made of an elastic material, when an external force acts vertically on the first flexible substrate 110 or the second flexible substrate 120, the thickness of the isolation layer 240 will decrease, causing part of the gate 230 to be able to contact the zigzag resistive film 210 and the strip resistive film 220 simultaneously, reducing the equivalent resistance of the position sensor; after the pressure is released, the isolation layer 240 can quickly rebound, and the gate 230 is no longer in contact with the zigzag resistive film 210 and the strip resistive film 220 again, so that the equivalent resistance of the position sensor returns to its initial value, ensuring the reliability of the detection result.

[0097] In a possible implementation, referring again to Figure 1 and Figure 2 , the number of isolation layers 240 is two, the zigzag resistive film 210 and the strip resistive film 220 are respectively located between the two isolation layers 240, the projections of each gate 230 on the first flexible substrate 110 are respectively located between the projections of the two isolation layers 240 on the first flexible substrate 110, and the extension direction of the isolation layer 240 is the same as that of the first flexible substrate 110.

[0098] It can be understood that by setting two isolation layers 240, and limiting that the zigzag resistive film 210 and the strip resistive film 220 are respectively located between the two isolation layers 240, the projections of each gate 230 on the first flexible substrate 110 are respectively located between the projections of the two isolation layers 240 on the first flexible substrate 110, and the extension direction of the isolation layer 240 is the same as that of the first flexible substrate 110, the first flexible substrate 110 and the second flexible substrate 120 can be effectively separated by the isolation layer 240, and when the position where each gate 230 is located is pressed, the gate 230 can contact the zigzag resistive film 210 and the strip resistive film 220 simultaneously.

[0099] In a possible implementation, the position sensor includes at least one resistive film group, and the resistive film group includes a plurality of zigzag resistive films 210 and a plurality of strip resistive films 220;

[0100] In any one resistive film group, the zigzag resistive films 210 and the strip resistive films 220 are arranged alternately, the zigzag resistive film 210 is connected end to end with the adjacent strip resistive film 220, the gate 230 can contact at most two strip resistive films 220 and one zigzag resistive film 210 under pressure, the head end of the resistive film group is connected to the resistance detection circuit through the first metal electrode 310, the zigzag resistive film 210 for contacting the gate 230 is connected to the resistance detection circuit through the second metal electrode 320, and the tail end of the resistive film group is connected to the resistance detection circuit through the third metal electrode 330;

[0101] When there are multiple resistive film groups, the second metal electrode 320 is multiplexed by the multiple resistive film groups.

[0102] It should be noted that by designing a suitable resistance detection circuit, it is possible to simultaneously detect the resistance values ​​of two sensor units through the same resistance detection circuit, or to respectively detect the resistance values ​​of two sensor units through different resistance detection circuits, which is not limited in the embodiments of the present application.

[0103] Based on this, when the number of the resistor film groups is one, the second metal electrode 320 can be used as a common detection electrode for the two sensing units. For example, the polarity of the second metal electrode 320 is negative, and the polarities of the third metal electrode 330 and the first metal electrode 310 are both positive. The resistance detection circuit can provide current and detection voltage to the first metal electrode 310 and the second metal electrode 320, so that the resistance detection circuit detects the change between the equivalent resistances of the first sensing unit, thereby locating the pressed gate 230 closest to the first end, and then determining one of the pressed positions of the position sensor. The resistance detection circuit can also provide current and detection voltage to the second metal electrode 320 and the third metal electrode 330, so that the resistance detection circuit detects the change between the equivalent resistances of the second sensing unit, thereby locating the pressed gate 230 closest to the second end, and then determining another pressed position of the position sensor, thereby realizing the simultaneous detection of multiple pressed positions by the position sensor. The position sensor is equivalent to a region recognition sensor. Therefore, the region recognition sensor can be applied to an electronic ruler.

[0104] For example, refer to Figure 8 , Figure 8 Another optional structural schematic diagram of the position sensor provided in the embodiment of the present application, the position sensor includes a resistor film group, the resistor film group includes two zigzag resistor films 210 and two strip resistor films 220, from top to bottom, the first strip resistor film 220 and the first zigzag resistor film 210 connected in series in sequence can be used as the first sensing unit, and the second strip resistor film 220 and the second zigzag resistor film 210 connected in series in sequence can be used as the second sensing unit. Specifically, two parallel sensing units are set on the top side of the first flexible substrate 110, and the first sensing unit remains connected to the resistance detection circuit, for example, the first The zigzag resistor film 210 of each sensing unit is connected to the resistance detection circuit via the first metal electrode 310, and the strip resistor film 220 of the first sensing unit is connected to the resistance detection circuit via the second metal electrode 320, the polarity of the second metal electrode 320 is opposite to that of the first metal electrode 310, the ends of the zigzag resistor film 210 of the first sensing unit and the strip resistor film 220 of the second sensing unit close to the first end are connected to each other, and the end of the strip resistor film 220 of the second sensing unit close to the first end is connected to the resistance detection circuit via the third metal electrode 330, and the polarity of the third metal electrode 330 is the same as that of the first metal electrode 310.

[0105] Among them, the projections of the respective gates 230 on the first flexible substrate 110 at least partially coincide with the projections of the strip-shaped resistance film 220 of the first sensing unit on the first flexible substrate 110, the projections of the respective gates 230 on the first flexible substrate 110 at least partially coincide with the projections of the zigzag-shaped resistance film 210 of the first sensing unit on the first flexible substrate 110, the projections of the respective gates 230 on the first flexible substrate 110 at least partially coincide with the projections of the strip-shaped resistance film 220 of the second sensing unit on the first flexible substrate 110, and the projections of the respective gates 230 on the first flexible substrate 110 do not coincide with the projections of the zigzag-shaped resistance film 210 of the second sensing unit on the first flexible substrate 110.

[0106] In addition, when the number of the resistor film groups is multiple, the multiple resistor film groups share the second metal electrode 320, which can simplify the circuit structure, reduce the production cost, and can also detect multiple pressing positions by using the respective resistor film groups, effectively improving the effect of position detection. For example, refer to Figure 9 , Figure 9 FIG. is an optional structural schematic diagram of a numeric keypad provided by an embodiment of the present application. The numeric keypad includes multiple resistor film groups, and the multiple resistor film groups share the second metal electrode 320.

[0107] Specifically, assuming that the conductivity of the zigzag-shaped resistance film 210 is much greater than that of the strip-shaped resistance film 220, and the conductivity of the gate 230 is much greater than that of the strip-shaped resistance film 220. At this time, when calculating the equivalent resistance of the position sensor, the resistance values of the zigzag-shaped resistance film 210 and the gate 230 can be ignored, and only the resistance value of the effective conduction path in the strip-shaped resistance film 220 is considered.

[0108] The following describes the case where the number of the resistor film groups is one.

[0109] Referring again to Figure 8 , the arrows in the figure are used to indicate the direction of current flow. When the position sensor is not pressed, the resistance value of the effective conduction path in the strip-shaped resistance film 220 of the first sensing unit is the equivalent resistance of the first sensing unit. By detecting, the equivalent resistance when the first sensing unit is not pressed is L1 is the length of the strip-shaped resistance film 220 in the first sensing unit, S1 is the cross-sectional area of the strip-shaped resistance film 220 in the first sensing unit, and the resistivity of the strip-shaped resistance film 220 in the first sensing unit is ρ;

[0110] In addition, when the position sensor is not pressed, the resistance value of the effective conduction path in the strip-shaped resistance film 220 of the second sensing unit is the equivalent resistance of the second sensing unit. By detecting, the equivalent resistance when the second sensing unit is not pressed is Let \(L_2\) be the length of the strip - shaped resistive film 220 in the second sensing unit, \(S_2\) be the cross - sectional area of the strip - shaped resistive film 220 in the second sensing unit, and the resistivity of the strip - shaped resistive film 220 in the second sensing unit be \(\rho\).

[0111] Among them, the positions \(P_1\) to \(P_9\) of the strip - shaped resistive film 220 of the first sensor unit are distributed in sequence from the first end to the second end, and the positions \(P_1\) to \(P_9\) of the strip - shaped resistive film 220 of the second sensor unit are distributed in sequence from the second end to the first end.

[0112] Then, when the position sensor is pressed, assume that the position \(P_3\) of the strip - shaped resistive film 220 of the first sensor unit in Figure 8 contacts the gate 230, and this gate 230 also contacts the folded - shaped resistive film 210 of the first sensor unit. Then, the equivalent resistance when the first sensing unit is pressed can be detected as The ratio between the resistance value when the first sensing unit is pressed and the resistance value when it is not pressed can be calculated as 3 / 10. Then, it can be determined that the first target pressing position is the position that moves \(3L_1 / 10\) along the extension direction of the strip - shaped resistive film 220 starting from the end of the strip - shaped resistive film 220 of the first sensing unit close to the first end;

[0113] In addition, when the position sensor is pressed, assume that the position \(P_4\) of the strip - shaped resistive film 220 of the second sensor unit in Figure 8 contacts the gate 230, and this gate 230 also contacts the folded - shaped resistive film 210 of the first sensor unit. Then, the equivalent resistance when the second sensing unit is pressed can be detected as The ratio between the resistance value when the second sensing unit is pressed and the resistance value when it is not pressed can be calculated as 4 / 10. Then, it can be determined that the second target pressing position is the position that moves \(4L_2 / 10\) along the opposite direction of the extension direction of the strip - shaped resistive film 220 starting from the end of the strip - shaped resistive film 220 of the second sensing unit close to the second end. The area between the two target pressing positions belongs to the touch area.

[0114] Referring to Figure 10 , Figure 10 is an optional flow schematic diagram of the position detection method provided by the embodiment of the present application. This position detection method can be executed by a position detection device, and this position detection method includes but is not limited to the following steps 1001 to step 1003.

[0115] Step 1001: When the second flexible substrate is not pressed, obtain the first resistance value of the above - mentioned position sensor, where the first resistance value is detected by a resistance detection circuit;

[0116] Step 1002: When any position where a gate is located on the second flexible substrate is pressed, obtain the second resistance value of the position sensor, where the second resistance value is detected by a resistance detection circuit;

[0117] Step 1003: Determine the target pressing position on the second flexible substrate according to the difference between the first resistance value and the second resistance value.

[0118] Among them, since the first resistance value is the resistance value detected when the second flexible substrate is not pressed, the first resistance value is the equivalent resistance when the position sensor is not pressed. Since the second resistance value is the resistance value detected when any position where a gate is located on the second flexible substrate is pressed, the second resistance value is the equivalent resistance when the position sensor is pressed.

[0119] It should be noted that the position detection device is electrically connected to the position sensor through the resistance detection circuit, so that the position detection device can detect the resistance value of the position sensor through the resistance detection circuit, that is, before and after the position sensor is pressed, the position detection device can effectively obtain the equivalent resistance of the position sensor, that is, detect the first resistance value and the second resistance value respectively.

[0120] Based on this, by setting the first flexible substrate and the second flexible substrate as the supporting parts of the position sensor, then arranging the zigzag resistance film and the strip resistance film side by side at intervals on the top side of the first flexible substrate, and arranging a plurality of gates on the bottom side of the second flexible substrate. Since the second flexible substrate is arranged at intervals above the first flexible substrate, when the position sensor is not pressed, each gate does not contact the zigzag resistance film and the strip resistance film. When the position sensor is pressed, some gates can simultaneously contact the zigzag resistance film and the strip resistance film. By defining that the ends of the zigzag resistance film and the strip resistance film close to the second end are connected to each other, the extending direction of the second flexible substrate is the same as that of the first flexible substrate, and each gate is distributed at intervals along the extending direction of the second flexible substrate. The position sensor only needs to connect the ends of the zigzag resistance film and the strip resistance film close to the first end to the resistance detection circuit through two leads, which can reduce the manufacturing process cost. Moreover, by detecting the resistance value of the position sensor through the resistance detection circuit, the difference between the resistance values before and after the position sensor is pressed can be determined, and then the pressing position of the position sensor can be determined through the difference between the resistance values before and after being pressed, that is, the target pressing position on the second flexible substrate is determined according to the difference between the first resistance value and the second resistance value, which can improve the position detection efficiency, and can also display and record the target pressing position.

[0121] In a possible implementation, referring to the above description, assuming that the conductivity of the zigzag resistive film is much greater than that of the strip resistive film, and the conductivity of the gate is much greater than that of the strip resistive film. At this time, when calculating the equivalent resistance of the position sensor, the resistance values of the zigzag resistive film and the gate can be ignored, and only the resistance value of the effective conduction path in the strip resistive film is considered.

[0122] At this time, according to the difference between the first resistance value and the second resistance value, the target pressing position on the second flexible substrate is determined. Specifically, the target length of the strip resistive film can be obtained, and the target ratio between the second resistance value and the first resistance value is determined; according to the product of the target length and the target ratio, the target distance is determined; the position obtained by moving the target distance along the extension direction of the strip resistive film starting from the end of the strip resistive film close to the first end is determined as the target pressing position. Based on this, the target pressing position can be quickly determined by the change of the equivalent resistance of the position sensor.

[0123] In a possible implementation, the position detection method further includes:

[0124] The second resistance values when each gate on the second flexible substrate is pressed are respectively obtained, and the target pressing position corresponding to each second resistance value is determined;

[0125] Each second resistance value is respectively associated and stored with the corresponding target pressing position;

[0126] When the second flexible substrate is pressed again, the third resistance value of the position sensor is obtained, where the third resistance value is detected by the resistance detection circuit;

[0127] Based on the third resistance value, each stored second resistance value is retrieved. When the second resistance value identical to the third resistance value is retrieved, the target pressing position corresponding to the retrieved second resistance value is displayed.

[0128] Based on this, by respectively obtaining the second resistance values when each gate on the second flexible substrate is pressed, determining the target pressing position corresponding to each second resistance value, and then respectively associating and storing each second resistance value with the corresponding target pressing position, it is equivalent to determining and storing the mapping relationship between the equivalent resistance detected when the position sensor is pressed and the target pressing position. Subsequently, whenever the second flexible substrate is pressed again, each stored second resistance value can be retrieved based on the third resistance value of the position sensor, and then the target pressing position corresponding to the retrieved second resistance value can be quickly retrieved and displayed, without repeated calculation, which can effectively improve the efficiency.

[0129] In addition, referring to Figure 11 , Figure 11Schematically shows the hardware structure of an electronic device according to another embodiment. The electronic device includes:

[0130] A processor 1101, which can be implemented in ways such as a general-purpose CPU (Central Processing Unit), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided by the embodiments of the present application;

[0131] A memory 1102, which can be implemented in forms such as a Read Only Memory (ROM), a static storage device, a dynamic storage device, or a Random Access Memory (RAM). The memory 1102 can store an operating system and other application programs. When implementing the technical solutions provided by the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 1102 and are called by the processor 1101 to execute the position detection method of the embodiments of the present application;

[0132] An input / output interface 1103, which is used to implement information input and output;

[0133] A communication interface 1104, which is used to implement communication interaction between this device and other devices. Communication can be achieved through a wired method (such as USB, network cable, etc.) or through a wireless method (such as a mobile network, WIFI, Bluetooth, etc.);

[0134] A bus 1105, which transmits information between various components of the device (such as the processor 1101, the memory 1102, the input / output interface 1103, and the communication interface 1104);

[0135] Among them, the processor 1101, the memory 1102, the input / output interface 1103, and the communication interface 1104 achieve communication connections with each other inside the device through the bus 1105.

[0136] The embodiments of the present application also provide a storage medium, which is a computer-readable storage medium for computer-readable storage. The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the above-mentioned position detection method.

[0137] As a non-transitory computer-readable storage medium, the memory can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory may optionally include memories that are remotely located relative to the processor, and these remote memories can be connected to the processor through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0138] The embodiments described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art will know that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0139] Those skilled in the art can understand that Figure 10 the technical solutions shown do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than those shown in the figure, or combine certain steps, or different steps.

[0140] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0141] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, and appropriate combinations thereof.

[0142] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0143] It should be understood that in this application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the relationship between associated objects and indicates that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist simultaneously. Here, A and B can be singular or plural. The character " / " generally indicates an "or" relationship between the associated objects before and after. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0144] In several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical, or other forms.

[0145] The units described above as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0146] In addition, in each embodiment of this application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0147] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of various embodiments of this application. The foregoing storage medium includes: various media that can store programs such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs.

[0148] The preferred embodiments of the embodiments of this application have been described above with reference to the accompanying drawings, which does not limit the scope of the rights of the embodiments of this application. Any modifications, equivalent replacements, and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of this application shall be within the scope of the rights of the embodiments of this application.

Claims

1. A position sensor, characterized in that, Comprising: A first flexible substrate having a first end and a second end disposed opposite to each other; A zigzag resistive film and a strip resistive film, which are arranged in parallel at intervals on the top side of the first flexible substrate. The end portions of the zigzag resistive film and the strip resistive film close to the first end are respectively connected to a resistance detection circuit, and the resistance detection circuit is used to detect the resistance value of the position sensor. The end portions of the zigzag resistive film and the strip resistive film close to the second end are connected to each other; A second flexible substrate, which is disposed at an interval above the first flexible substrate, and the second flexible substrate is consistent with the first flexible substrate in the extending direction; A plurality of gates, which are disposed on the bottom side of the second flexible substrate, and each of the gates is distributed at intervals along the extending direction of the second flexible substrate.

2. The position sensor according to claim 1, wherein The resistance value of the position sensor and the touch distance of the position sensor satisfy the following relationship: Wherein, L is the touch distance, R is the resistance value of the position sensor, R0 is the resistance value of the strip resistive film, and L0 is the length of the strip resistive film.

3. The position sensor according to claim 2, wherein The conductivity of the zigzag resistive film is greater than that of the strip resistive film, the conductivity of the gate is greater than that of the strip resistive film, the resistance of the zigzag resistive film is evenly distributed, the line resistance deviation of any region in the zigzag resistive film is less than ±5%, the resistance of the strip resistive film is evenly distributed, and the line resistance deviation of any region in the strip resistive film is less than ±5%.

4. The position sensor according to claim 1, characterized in that, The zigzag resistive film is a composite film prepared from at least one of carbon fiber, carbon nanotube, graphene, porous carbon, nano silver powder, nano copper powder or nano gold powder and a polymer resin, or the zigzag resistive film is one of copper foil, gold foil, silver foil, aluminum foil and platinum foil; The strip resistive film is a composite film prepared from at least one of carbon fiber, carbon nanotube, graphene, porous carbon, nano silver powder, nano copper powder or nano gold powder and a polymer resin; The polymer resin includes at least one of acrylic acid, polyurethane, polyimide, phenolic resin, urea formaldehyde resin, epoxy resin or unsaturated resin.

5. The position sensor according to claim 4, wherein The extending direction of each of the gates is perpendicular to the extending direction of the second flexible substrate, and the gate is a composite film prepared from at least one of carbon fiber, carbon nanotube, graphene, porous carbon, nano silver powder, nano copper powder or nano gold powder and the polymer resin, or the gate is one of copper foil, gold foil, silver foil, aluminum foil and platinum foil.

6. The position sensor according to claim 1, characterized in that, The position sensor further includes an isolation layer made of an elastic material, the isolation layer is disposed on the top side of the first flexible substrate, and the bottom side of the second flexible substrate is connected to the isolation layer.

7. The position sensor according to claim 6, characterized in that, When an external force acts vertically on the first flexible substrate or the second flexible substrate, the thickness of the isolation layer decreases, so that the gate is simultaneously in contact with the zigzag resistive film and the strip resistive film to reduce the resistance value of the position sensor.

8. The position sensor according to claim 1, characterized in that, The position sensor includes at least one resistive film group, and the resistive film group includes a plurality of the zigzag resistive films and a plurality of the strip resistive films; In any one of the resistor film groups, the zigzag resistor film and the strip-shaped resistor film are arranged alternately, the zigzag resistor film is connected end to end with the adjacent strip-shaped resistor film, the gate contacts at most two of the strip-shaped resistor films and one zigzag resistor film under pressure, the head end of the resistor film group is connected to the resistance detection circuit through a first metal electrode, the zigzag resistor film for contacting the gate is connected to the resistance detection circuit through a second metal electrode, and the tail end of the resistor film group is connected to the resistance detection circuit through a third metal electrode; When there are multiple resistor film groups, the multiple resistor film groups share the second metal electrode.

9. A position detection method, characterized in that, Comprising: When the second flexible substrate is not pressed, obtain the first resistance value of the position sensor according to any one of claims 1 to 6, wherein the first resistance value is detected by a resistance detection circuit; When any position where the gate is located on the second flexible substrate is pressed, obtain the second resistance value of the position sensor, wherein the second resistance value is detected by the resistance detection circuit; Determine the target pressing position on the second flexible substrate according to the difference between the first resistance value and the second resistance value.

10. The position detection method according to claim 9, wherein The position detection method further comprises: Obtain the second resistance values respectively when the positions where the gates are located on the second flexible substrate are pressed, and determine the target pressing positions corresponding to the second resistance values; Associate and store each of the second resistance values with the corresponding target pressing position; When the second flexible substrate is pressed again, obtain the third resistance value of the position sensor, wherein the third resistance value is detected by the resistance detection circuit; Retrieve each of the stored second resistance values based on the third resistance value, and when the second resistance value identical to the third resistance value is retrieved, display the target pressing position corresponding to the retrieved second resistance value.

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