CN115014180B - Touch positioning sensor manufacturing method and touch positioning sensor - Google Patents
Touch positioning sensor manufacturing method and touch positioning sensor Download PDFInfo
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- CN115014180B CN115014180B CN202210480467.5A CN202210480467A CN115014180B CN 115014180 B CN115014180 B CN 115014180B CN 202210480467 A CN202210480467 A CN 202210480467A CN 115014180 B CN115014180 B CN 115014180B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
Abstract
A method for manufacturing a touch positioning sensor and the touch positioning sensor comprise the following steps: 1) Preparing a plurality of gradient resistance elements on a substrate, wherein the resistance values of the plurality of gradient resistance elements are different and are arranged at intervals to form a preset shape, and manufacturing first conductive films on two sides of each gradient resistance element to connect adjacent gradient resistance elements; 2) Second conductive films are respectively manufactured on two sides of each gradient resistance element, one end of each second conductive film is perpendicular to and connected with the corresponding first conductive film, the other end of each second conductive film extends inwards relatively and is parallel to the gradient resistance, and a gap is formed between the two second conductive films; 3) A movable touch button is arranged above a gap between the two second conductive films of each gradient resistor; 4) And manufacturing electrodes at the tail ends of the first conductive films at two ends of the preset shape. The invention has the characteristics of simple preparation method, low cost, simple structure, small electrode quantity, elimination of signal crosstalk, prevention of position sensing interference, great reduction of system configuration requirements of a man-machine interaction system and the like.
Description
Technical Field
The invention relates to the field of sensors, in particular to a touch positioning sensor and a manufacturing method thereof.
Background
The touch positioning sensor is a computing device which can detect external mechanical stimulation and integrate, transmit and identify signals, and is an important human-computer interaction interface. Human-computer interaction can realize some interactions between people and the virtual world, and the virtual world can be controlled through a human-computer interaction interface. Touch location sensors have important application prospects in various fields, such as consumer electronics, information security, robotics, virtual reality, augmented reality, metas-cosmos, artificial skin, health monitoring, wearable devices, touch screens, and the like. With the continuous progress of society, science and technology and economy are continuously developed, and the demand for touch positioning sensors is continuously increased. For example, in the field of information security, the touch positioning sensor can identify and authenticate the identity to prevent the information privacy from being leaked; in the health monitoring field, touch location sensors can analyze health conditions by monitoring physiological signals of a person; in the field of touch screens, functions such as image zooming and object control can be realized through single-point touch or multi-point touch.
The traditional touch positioning sensor generally needs M × N × 2 electrodes (M and N are the number of touch point longitude and latitude lines), which causes the transmission and processing of signals to be very complicated and cannot meet the complicated signal processing such as multi-point touch. The touch positioning sensor with high accuracy and stability and capable of learning and memorizing human-computer interaction plays an important role in the fields of human health monitoring, intelligent surgical operation, information privacy safety and the like.
At present, the touch positioning sensor has made some progress, and the number of electrodes can be reduced to M multiplied by N +1 or M + N through structural design, so that the measurement time is shortened, and the process of signal processing is simplified (Nano Energy,2017,32,389-396 advanced materials,2018,30,1802516; patent CN 202771407U). However, these touch location sensors are either unstable and susceptible to signal interference or have complex structures with numerous electrodes. The touch positioning sensor which is high in preparation stability, low in system configuration requirement, high in signal detection speed, simple in structure and few in electrode number is still a relatively large challenge at present.
Disclosure of Invention
The invention mainly aims to overcome the defects of the touch positioning sensor in the prior art, and provides a manufacturing method of the touch positioning sensor and the touch positioning sensor, which have the characteristics of quick large-area preparation, low cost, good product performance, simple and convenient operation and the like.
The invention adopts the following technical scheme:
a method for manufacturing a touch positioning sensor is characterized by comprising the following steps:
1) Preparing a plurality of gradient resistance elements on a substrate, wherein the resistance values of the plurality of gradient resistance elements are different and are arranged at intervals to form a preset shape, and manufacturing first conductive films on two sides of each gradient resistance element to connect adjacent gradient resistance elements;
2) Second conductive films are respectively manufactured on two sides of each gradient resistance element, one end of each second conductive film is perpendicular to and connected with the corresponding first conductive film, the other end of each second conductive film extends inwards oppositely and is parallel to the gradient resistance, and a gap is formed between the two second conductive films;
3) A movable touch button is arranged above a gap between the two second conductive films of each gradient resistor, a third conductive film is arranged at the bottom end of the movable touch button, and when the movable touch button is pressed, the third conductive film is connected with the two corresponding second conductive films to enable the corresponding gradient resistor elements to be in short circuit;
4) And manufacturing electrodes at the tail ends of the first conductive films at two ends of the preset shape.
The step 1) specifically comprises the following steps:
1.1 Four pieces of adhesive tape are pasted on a substrate to form an area, 8B pencil is used for drawing in the area, after multiple times of drawing, the area is filled with conductive materials, and the adhesive tape is peeled off to obtain a smooth and uniform conductive film to form a gradient resistance element;
1.2 Repeating the step 1.1) for different drawing times every time to obtain a plurality of gradient resistor elements with different resistors, and arranging a plurality of gradient resistors into a preset shape, wherein intervals are arranged among the gradient resistor elements;
1.3 A silver circuit drawing pen is used to draw the first conductive film on both sides of each of the gradient resistance elements.
And 2) adopting a silver circuit drawing pen to draw second conductive films on two sides of each gradient resistance element.
In step 3), in each of the gradient resistive elements, a gasket is arranged on the side of the other end of the second conductive film to mount the touch button.
And 4) leading out electrodes from the tail ends of the first conductive films at two ends of the preset shape by using silver paint, and realizing circuit connection and signal transmission through the electrodes.
In the step 4), the method further comprises the step of fixing the cover plate and the substrate, wherein the plurality of gradient resistance elements, the first conductive film and the second conductive film are located between the cover plate and the substrate.
The gradient resistor is made of graphene, graphite powder, carbon nanotubes, conductive carbon black powder, carbon materials derived from natural biological materials, inorganic conductive materials, metal nanowires, metal nanoparticles, metal materials or conductive polymer materials.
The substrate is made of paper, high polymer materials, wood or glass.
The preset shape comprises a line shape, an arc shape or an S shape.
The touch positioning sensor is characterized by being manufactured by the manufacturing method of the touch positioning sensor.
As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:
1. compared with other sensors, the touch positioning sensor has the characteristics of rapid large-area preparation, low cost, good product performance, simple and convenient operation and the like.
2. The response time of the conversion state of the touch positioning sensor before and after the touch is less than 3ms, the requirement of quick detection is well met, and the touch positioning sensor has the advantages of quick response and the like.
3. The touch positioning sensor is a multi-point touch positioning sensor with only two electrodes, not an MXNx2 or M + N electrode array, and can perform skilled operation identification on object control through ingenious design, thereby realizing multiple functions, eliminating signal crosstalk, preventing position sensing interference and greatly reducing the configuration requirement of a human-computer interaction system.
4. The touch positioning sensor of the invention provides a gradient resistance element structure, and is applied to the construction of a multi-point touch sensor, so that the detection and identification range of multiple mechanical stimuli can be widened, and diversified possibility and practicability are provided for human-computer interaction.
5. The main principle of the touch location sensor of the present invention is that the fingertip touches the active touch button to cause a resistive short circuit in the gradient resistive layer, which changes the resistance of the sensor, and this change in resistance can be used to identify the location of the touch press.
6. The touch location sensor of the present invention can be easily designed in a variety of shapes and configurations for the needs of practical application scenario development.
7. The touch positioning sensor has wide application prospect in the fields of human-computer interaction, mechanical arms, intelligent network security and the like.
Drawings
FIG. 1 is a schematic diagram of a single gradient resistive element;
FIG. 2 is a schematic diagram of an arrangement of linear shaped gradient resistive elements;
FIG. 3 is a schematic view of a plurality of resistance gradient elements connected to a first conductive film;
FIG. 4 is an enlarged view of the single ladder resistance element of FIG. 3 in connection with a first conductive film;
FIG. 5 is a schematic view of a second conductive film;
FIG. 6 is an enlarged view of a single gradient resistive element of FIG. 5;
FIG. 7 is a schematic view of an active touch button;
FIG. 8 is a schematic view of a mounting pad;
FIG. 9 is a schematic view of a single structure of FIG. 8;
FIG. 10 is a schematic diagram of an installation of active touch buttons (embodiment one);
FIG. 11 is a schematic illustration of fabricating an electrode;
FIG. 12 is a schematic perspective view of the present invention (embodiment one);
FIG. 13 is a schematic diagram of an arc-shaped touch location sensor of the second embodiment;
fig. 14 is a schematic diagram of an S-shaped touch location sensor of a third embodiment;
wherein: 1. the touch screen comprises a substrate, a first conductive film 2a, a second conductive film 2b, a gradient resistance element 3, a gradient resistance element 4, a gasket 5, an electrode 6, a movable touch button 6a and a third conductive film.
The invention is described in further detail below with reference to the figures and specific examples.
Detailed Description
The invention is further described below by means of specific embodiments.
The terms "first," "second," "third," and the like in this disclosure are used solely to distinguish between similar items and not necessarily to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. In the description, the directions or positional relationships indicated by "up", "down", "left", "right", "front" and "rear" are used based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the scope of the present invention. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Example one
A method for manufacturing a touch positioning sensor comprises the following steps:
1) Preparing a plurality of gradient resistor elements 3 on a substrate 1, wherein the plurality of gradient resistor elements 3 have different resistance values and are arranged at intervals to form a preset shape, and manufacturing first conductive films 2a at two sides of each gradient resistor element 3 to connect the adjacent gradient resistor elements 3; the method specifically comprises the following steps:
1.1 Four pieces of tape are adhered to the substrate 1 to form an area, 8B pencil is used to draw in the area, after several times of drawing, the area is filled with conductive material, the tape is peeled off to obtain a smooth and uniform conductive film to form a gradient resistance element 3, see fig. 1. Wherein, the substrate 1 can be made of paper, polymer material, wood or glass, and the size of the area enclosed by the four pieces of adhesive tape can be 5 multiplied by 10mm 2 . The material of the gradient resistance element 3 is related to the material of the 8B pencil, and may be graphene, graphite powder, carbon nanotubes, conductive carbon black powder, a carbon material derived from a natural biological material, an inorganic conductive material, a metal nanowire, a metal nanoparticle, a metal material, or a conductive polymer material, which may be one or a mixture of more of them.
1.2 Repeating the step 1.1) for different times of drawing each time to obtain a plurality of gradient resistor elements 3 with different resistances, and arranging a plurality of gradient resistors into a preset shape, for example, including 7 gradient resistor elements 3, as shown in fig. 2. The content of the conductive material is different when the drawing times are different each time, so that the resistance is different. Each gradient resistive element 3 has a spacing therebetween, for example 10mm apart. In this embodiment, the predetermined shape is a linear shape, that is, a plurality of gradient resistive elements 3 are arranged along a straight line.
1.3 The first conductive films 2a are drawn on both sides of each of the gradient resistance elements 3 with a silver circuit drawing pen. In this step, the gap between the respective gradient resistive elements 3 can be drawn a plurality of times by a silver circuit drawing pen so that the resistance of the first conductive film 2a is close to 1 Ω/cm and is formed to have a size of 2 × 10mm 2 The first conductive film 2a.
2) Two sides of each gradient resistor element 3 are respectively fabricated with second conductive films 2b, one end of each second conductive film 2b is perpendicular to and connected with the corresponding first conductive film 2a, the other end extends inwards relatively and is parallel to the gradient resistor, and a gap is formed between the two second conductive films 2 b. In this step, a silver circuit drawing pen may be used to draw the second conductive film 2b on both sides of each of the gradient resistive elements 3 to form two 2 × 4.5mm thick films 2 The second conductive films 2b are spaced apart from each other by 1mm as shown in fig. 5 and 6.
3) A movable touch button 6 is arranged above the gap between the two second conductive films 2b of each gradient resistor, a third conductive film 6a is arranged at the bottom end of the movable touch button 6, and when the movable touch button 6 is touched or pressed, the third conductive film 6a is connected with the two corresponding second conductive films 2b to enable the corresponding gradient resistor elements 3 to be short-circuited. Referring to fig. 7, the size of the movable touch button 6 may be 10 × 10mm 2 The size of the third conductive film 6a on each movable touch button 6 may be 2 × 2mm 2 The third conductive film 6a is larger than the gap between the two second conductive films 2b, so that the gradient resistive element 3 can be short-circuited when the movable touch button 6 is pressed.
Specifically, in each ladder resistance element 3, the other end of the second conductive film 2b, i.e., the end parallel to the ladder resistance element 3, is provided with a spacer 4 on its side for mounting a touch button, and the spacer 4 may be a double-sided tape having a thickness of typically 0.16mm, as shown in fig. 8, 9 and 10. Thus, the manufactured unpackaged gradient resistive element 3 with the movable touch button 6 has a touch function, and can short-circuit the resistance in the gradient resistive element 3.
4) Electrodes 5 are formed at the ends of the first conductive film 2a at both ends of the predetermined shape. Specifically, the electrodes 5 may be drawn out by silver paint at the ends of the first conductive film 2a at both ends of the predetermined shape, and the circuit connection and signal transmission with the terminals are realized through the electrodes 5, see fig. 11.
In the invention, the cover plate is fixed with the substrate 1, the plurality of gradient resistance elements 3, the first conductive film 2a and the second conductive film 2b are positioned between the cover plate and the substrate 1, and the cover plate is arranged to prevent resistance value change caused by unintentionally touching the movable touch button 6. In the invention, the cover plate can be made of the same material as the base plate 1, and the cover plate and the base plate 1 can be fixed by adopting adhesive tape. Thus, the obtained touch positioning sensor is placed in a flat place, and the touch positioning sensor can perform corresponding functions through touch.
The response resistance values of all the gradient resistance elements 3 of the touch positioning sensor manufactured by the invention are different and each condition corresponds to a specific resistance value interval range, so that the response resistance values of the touch positioning sensor correspond to the touch buttons at different positions and the quantity information of the touch buttons. If the terminal receives different resistance signals, the positioning function can be realized according to the response resistance of the touch positioning sensor, and the positions where the fingers touch are judged. Thus, the terminal can recognize the user's exact command from the determined resistance signal, which represents a fixed command.
The invention also provides a touch positioning sensor which is manufactured by the manufacturing method of the touch positioning sensor.
The touch positioning sensor is provided with a plurality of gradient resistance elements 3, a plurality of movable touch buttons 6 and two electrodes 5. The gradient resistor elements 3 have different resistance values and are arranged at intervals to form a preset shape (the embodiment takes the linear shape as an example), the number of the gradient resistor elements can be increased and decreased according to the requirements of the situation, structures with different shapes can be manufactured to adapt to the actual scene, the gradient resistor elements 3 are connected through the first conducting films 2a, the second conducting films 2b connected with the first conducting films 2a are arranged, the movable touch button 6 is arranged above the gap between the two second conducting films 2b of the gradient resistor elements 3, and the two electrodes 5 are respectively connected with the two first conducting films 2a at the tail ends of the gradient resistor elements 3 which are arranged in the linear shape to realize circuit connection and signal transmission.
For example, the manufactured touch positioning sensor is fixed on a desktop by using an adhesive tape, the two electrodes 5 are connected with a human-computer interaction module played by a piano to detect the pressed position of a finger, and when the finger touches the movable touch button 6, the human-computer interaction module can emit corresponding tone.
Compared with other touch positioning sensors, the touch positioning sensor has the characteristics of simple preparation method, low cost, simple structure, small number of electrodes, elimination of signal crosstalk, prevention of interference of position sensing, great reduction of system configuration requirements of a man-machine interaction system and the like. The response time of the touch positioning sensor in the transition state before and after the touch is less than 3ms, and the touch positioning sensor has the advantages of high stability, high signal detection speed and the like. The touch positioning sensor can be tiled on a desktop and used for touch positioning detection of finger tips and can also be fixed at the back of a hand for touch positioning detection.
Example two
A manufacturing method of a touch positioning sensor and the touch positioning sensor have the same main characteristics as the first embodiment, and the difference is that: in the present embodiment, the plurality of gradient resistor elements 3 are arranged in an arc shape, and the substrate 1 and the cover plate may be circular. For example, 5 gradient resistive elements 3 and 5 movable touch buttons 6, see fig. 13, are arranged in a circular arc.
The touch positioning sensor of this embodiment can place in the back of the hand, and its electrode can establish connection communication with unmanned aerial vehicle, and when finger touch activity touch button 6, unmanned aerial vehicle can make corresponding instruction according to activity touch button 6.
EXAMPLE III
A manufacturing method of a touch positioning sensor and the touch positioning sensor have the same main characteristics as the first embodiment, and the difference is that: in the present embodiment, a plurality of gradient resistive elements 3 are arranged in an S-shape. For example, referring to fig. 14, 9 gradient resistive elements 3 and 9 movable touch buttons 6 are included. In the present embodiment, the substrate 1 and the cover plate may have a polygonal shape, such as a hexagonal shape.
The 9 keys of the touch positioning sensor of the embodiment can simulate a numeric keyboard, and the identity of a person who presses the keys can be identified through dynamic key identification.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using this concept shall fall within the scope of the present invention.
Claims (9)
1. A method for manufacturing a touch positioning sensor is characterized by comprising the following steps:
1) The method comprises the following steps of preparing a plurality of gradient resistor elements on a substrate, wherein the plurality of gradient resistor elements have different resistance values and are arranged at intervals to form a preset shape, and manufacturing first conductive films on two sides of each gradient resistor element to connect adjacent gradient resistor elements, and specifically comprises the following steps:
1.1 Four pieces of adhesive tape are pasted on a substrate to form an area, 8B pencil is used for drawing in the area, after a plurality of times of drawing, the area is filled with conductive materials, and the adhesive tape is peeled off to obtain a smooth and uniform conductive film to form a gradient resistance element;
1.2 Repeating the step 1.1) for different drawing times each time to obtain a plurality of gradient resistor elements with different resistors, and arranging a plurality of gradient resistors into a preset shape with intervals among the gradient resistor elements;
1.3 Drawing a first conductive film on both sides of each gradient resistive element using a silver circuit drawing pen;
2) Second conductive films are respectively manufactured on two sides of each gradient resistance element, one end of each second conductive film is perpendicular to and connected with the corresponding first conductive film, the other end of each second conductive film extends inwards relatively and is parallel to the gradient resistance, and a gap is formed between the two second conductive films;
3) A movable touch button is arranged above a gap between the two second conductive films of each gradient resistor, a third conductive film is arranged at the bottom end of the movable touch button, and when the movable touch button is pressed, the third conductive film is connected with the two corresponding second conductive films to enable the corresponding gradient resistor elements to be in short circuit;
4) And manufacturing electrodes at the tail ends of the first conductive films at two ends of the preset shape.
2. A method of making a touch location sensor according to claim 1, wherein: and 2) adopting a silver circuit drawing pen to draw second conductive films on two sides of each gradient resistance element.
3. A method of making a touch location sensor according to claim 1, wherein: in step 3), in each of the gradient resistive elements, a gasket is arranged on the side of the other end of the second conductive film to mount the touch button.
4. A method of making a touch location sensor according to claim 1, wherein: and 4) leading out electrodes from the tail ends of the first conductive films at two ends of the preset shape by using silver paint, and realizing circuit connection and signal transmission through the electrodes.
5. A method of making a touch location sensor according to claim 1, wherein: in the step 4), the method further comprises the step of fixing the cover plate and the substrate, wherein the plurality of gradient resistance elements, the first conductive film and the second conductive film are located between the cover plate and the substrate.
6. A method of making a touch location sensor according to claim 1, wherein: the gradient resistor is made of graphene, graphite powder, carbon nanotubes, conductive carbon black powder, carbon materials derived from natural biological materials, inorganic conductive materials, metal nanowires, metal nanoparticles, metal materials or conductive high polymer materials.
7. A method of making a touch location sensor according to claim 1, wherein: the substrate is made of paper, high polymer materials, wood or glass.
8. A method of making a touch location sensor according to claim 1, wherein: the preset shape comprises a line shape, an arc shape or an S shape.
9. A touch location sensor manufactured by the method of any one of claims 1 to 8.
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