TWM587744U - Pressure sensing system - Google Patents

Abstract

This creation provides a pressure-sensing system including: a first pressure-sensing piece, a second pressure-sensing piece, and a processing device; a first flexible substrate of the first pressure-sensing piece is provided with a first conductive totem; and a second pressure The second flexible substrate of the sensing sheet is provided with a second conductive totem, and the second pressure sensing sheet is superimposed on the first conductive totem of the first pressure sensing sheet with the second conductive totem; the processing device outputs a power to the first A pressure sensing piece, and a pressure sensing signal is obtained from the second pressure sensing piece, and the pressure sensing signal is compared with a threshold value to determine whether the first pressure sensing piece and the second pressure sensing piece are subjected to external force Resistance; by this way, through the judgment of the critical value, the generation of error signals can be avoided, thereby increasing the sensing accuracy.

Description

Pressure sensing system

This creation is about a pressure sensing related field, especially a pressure sensing system for soft electronics.

According to the pressure, the flexible electronic pressure device is provided on a flexible or flexible substrate with a sensing pressure structure, and the pressure measurement is performed by the sensing pressure structure. Among them, the flexible electronic pressure device is suitable for a large area and bending measurement environment. For example: ultra-thin adjustable keyboard for tablet computers, active pressure pen components, wearable pressure sensing components or medical detection pressure sensing components, etc.

However, when a flexible electronic pressure device is bent, it is easy to output unstable electrical signals and easily cause measurement errors. To improve the aforementioned problems, such as US Patent No. US7980144B2, a flexible electronic pressure sensing device and a manufacturing method thereof are disclosed. It includes a multilayer flexible film, a plurality of electrodes, a plurality of sensing blocks, and a plurality of bumps. Each flexible film is spaced to define two spaces. Each electrode and each sensing block are arranged on the flexible film and located in one of the spaces. Inside, and each bump is arranged on the flexible film and is located in another space, the air in the two spaces can maintain the relative distance between each electrode and the two flexible films of each sensing block; When the detection device is deformed, it is possible to avoid false detection signals due to the contact between the sensing blocks and the electrodes or the two sensing blocks respectively disposed on different flexible films.

However, the aforementioned patents need to pass a complicated structural design in order to spend a lot of manufacturing processes and costs, in order to avoid the soft film from contacting each other and generating an error signal without being pressed.

Furthermore, if the aforementioned patented soft electronic pressure sensing device is applied to a wearable pressure sensing component or a medical detection pressure sensing component, the sensing blocks and bumps protruding from the flexible film are easy to bring to the user when wearing Or foreign body sensation during medical tests, causing discomfort to users.

In order to solve the above problems, this creation provides a pressure-sensing system. By setting and judging the critical value, it is possible to avoid the problem of two electrodes contacting each other without using an additional complicated structure, thereby effectively simplifying the process, improving reliability, and increasing its application range. And measurement comfort.

An embodiment of the present invention provides a pressure sensing system including: a first pressure sensing sheet having a first flexible substrate and a first conductive totem, the first conductive totem is disposed on the first flexible substrate A second pressure sensing piece having a second flexible substrate and a second conductive totem, the second conductive totem is disposed on the surface of the second flexible substrate, wherein the second pressure sensing piece One surface provided with a second conductive totem is superposed on the first pressure sensing plate and one surface provided with the first conductive totem; and a processing device which is electrically connected to the first pressure sensing plate and the second pressure sensing plate, The processing device outputs a power to the first pressure sensing piece, obtains a pressure sensing signal from the second pressure sensing piece, and compares the pressure sensing signal with a threshold value to determine the first pressure sensing piece and the first pressure sensing piece. Whether the pressure sensing piece is resisted by external force.

Based on the above, this creation superimposes the first pressure sensing piece and the second pressure sensing piece on each other to further obtain the pressure sensing signal, and judges the pressure sensing signal and the critical value to generate an effective measurement result. In this way, with a simple structure and a critical value setting, the generation of measurement error signals can be effectively avoided, and the disadvantages of measurement errors can be avoided by improving the structure through complex structures.

In one embodiment, the first conductive totem has a first highly conductive line and a first low conductive line electrically connected to one of the first high conductive lines. The first low conductive line extends from the first high conductive line and is connected to the first conductive line. A first pressure sensing area is formed on a flexible substrate, and the area of the first pressure sensing area is larger than the area occupied by the first highly conductive circuit on the first flexible substrate. The second conductive totem has a second highly conductive circuit. And a second low conductive line electrically connected to one of the second high conductive lines, the second low conductive line extending from the second high conductive line and forming a second pressure sensing area on the second flexible substrate, the second pressure sensing The area of the area is larger than the area occupied by the second highly conductive line on the second flexible substrate; thereby, the power is transmitted to the first low conductive line through the first high conductive line, and the first low conductive line and the second low conductive line. When the circuits are in contact with each other, a pressure sensing signal is generated, and the pressure sensing signal is transmitted back to the processing device through the second high-conducting circuit, thereby improving the sensitivity and accuracy of the measurement through the design of the high-conducting circuit.

In one embodiment, the first pressure-sensing sheet further has a first insulating layer, and the first insulating layer covers a side of the first highly conductive circuit away from the first flexible substrate; the second pressure-sensing sheet It also has a second insulating layer, and the second insulating layer covers one side of the second highly conductive circuit away from the second flexible substrate; thereby, the first highly conductive layer is avoided through the arrangement of the first insulating layer and the second insulating layer. The circuit and the second-highest conductive circuit have a problem of excessive current consumption due to contact with each other.

In one embodiment, the number of the first conductive totems is plural. Each first conductive totem has a first transmission part, each first transmission part is electrically connected to the processing device independently, and each first transmission part The two ends are respectively connected to the processing device and each of the first conductive totems; the number of the second conductive totems is plural, and each of the second conductive totems has a second transmission section, and each of the second transmission sections is independent of the processing device. The two ends of each second transmission part are respectively connected to the processing device and each second conductive totem; thereby, the number of conductive totems can be increased according to the requirements of the measurement area, and when each conductive totem is under pressure, The pressure sensing signal is transmitted back to the processing device by the transmission unit, so as to determine the pressured part and area, so as to achieve the effect of detecting pressure changes in different ranges.

In order to facilitate the explanation of the central idea expressed by the author in the above-mentioned new content column, specific embodiments are used to express it. Various objects in the embodiments are depicted in proportions, sizes, deformations, or displacements suitable for illustration, rather than in proportion to actual elements and their related positions, which will be described together.

Please refer to FIG. 1 to FIG. 7. The first embodiment of the present invention provides a pressure sensing system 100 including:

A first pressure-sensing sheet 10 having a first flexible substrate 11 and a first conductive totem 12. The first conductive totem 12 is disposed on a surface 111 of the first flexible substrate 11. In this creative embodiment, The first conductive totem 12 is formed on the surface 111 of the first flexible substrate 11 in a printed circuit manner; thereby, the first pressure sensing sheet 10 is formed into a thin flat surface.

The first conductive totem 12 has a first highly conductive line 121, a first low conductive line 122, a first insulating layer 123, and a first transmission portion 124. The first high conductive line 121 and the first low conductive line 122 and The first transmission portion 124 is electrically connected, and the first insulating layer 123 covers one side of the first highly conductive circuit 121 away from the first flexible substrate 11, wherein the first low conductive circuit 122 extends from the first highly conductive circuit 121 and A first pressure sensing region 13 is formed on the first flexible substrate 11. The area of the first pressure sensing region 13 is larger than the area occupied by the first highly conductive circuit 121 on the first flexible substrate 11. In this creative embodiment, In the middle, the first high-conducting circuit 121 is made of silver, and the first low-conducting circuit 122 is made of conductive carbon. The first conductive totem 12 is generally rectangular. The first high-conducting circuit 121 is provided on at least one side of the rectangular periphery and branches. The crosses are arranged in a rectangular shape, and the first low conductive lines 122 are extended and staggered from the first high conductive lines 121 to form a mesh structure.

Furthermore, the first insulating layer 123 can directly cover the first highly conductive circuit 121 or indirectly cover the first highly conductive circuit 121; please refer to FIG. 2 to FIG. 4, which are the first type of the first conductive totem 12, An insulating layer 123 directly covers the first highly conductive line 121; please refer to FIG. 5 to FIG. 7, which is the second type of the first conductive totem 12. The first insulating layer 123 indirectly covers the first highly conductive line 121. The first low-conducting circuit 122 is divided into a first covering area 122a and a first routing area 122b. The first covering area 122a is provided on a side of the first high-conducting circuit 121 away from the first flexible substrate 11, and the first An insulating layer 123 covers the first covering area 122 a, and the first layout area 122 b is provided on the surface 111 of the first flexible substrate 11.

A second pressure-sensing sheet 20 having a second flexible substrate 21 and a second conductive totem 22. The second conductive totem 22 is disposed on the surface 211 of the second flexible substrate 21. In this creative embodiment, The second conductive totem 22 is formed on the surface 211 of the second flexible substrate 21 in a printed circuit manner; thereby, the second pressure sensing sheet 20 is formed into a thin flat surface.

The second conductive totem 22 has a second highly conductive line 221, a second low conductive line 222, a second insulating layer 223, and a second transmission portion 224. The second high conductive line 221 and the second low conductive line 222 and The second transmission part 224 is electrically connected, and the second insulating layer 223 covers one side of the second highly conductive line 221 away from the second flexible substrate 21, wherein the second low conductive line 222 extends from the second highly conductive line 221 and A second pressure sensing region 23 is formed on the second flexible substrate 21, and the area of the second pressure sensing region 23 is larger than the area occupied by the second highly conductive circuit 221 on the second flexible substrate 21. In this creative embodiment, In the middle, the second high conductive line 221 is made of silver, and the second low conductive line 222 is made of conductive carbon. The second conductive totem 22 has a rectangular shape. The second high conductive line 221 is provided on at least one side of the rectangular peripheral edge and branches. The crosses are arranged in a rectangular shape, and the second low-conducting circuit 222 extends from the second high-conducting circuit 221 to form a mesh structure.

Furthermore, the second insulating layer 223 can directly cover the second high-conducting circuit 221 or indirectly cover the second high-conducting circuit 221; when the second insulating layer 223 indirectly covers the second high-conducting circuit 221, the second low-conducting circuit The circuit 222 is divided into a second covering area 222a and a second routing area 222b. The second covering area 222a is provided on a side of the second highly conductive circuit 221 away from the second flexible substrate 21, and the second insulating layer 223 covers the The second cover area 222 a and the second layout area 222 b are provided on the surface 211 of the second flexible substrate 21.

In addition, in the present creative embodiment, the first pressure sensing piece 10 and the second pressure sensing piece 20 have the same structure, that is, the setting type of the first conductive totem 12 and the setting type of the second conductive totem 22 State is the same. Depending on the actual conditions of use, different structures can also be used. In addition, the first flexible substrate 11 and the second flexible substrate 21 are made of transparent plastic in this embodiment, but different flexible materials can be used according to actual requirements.

A processing device 30 electrically connected to the first pressure sensing sheet 10 and the second pressure sensing sheet 20, wherein the second pressure sensing sheet 20 is superposed on the first surface 211 provided with the second conductive totem 22 The pressure sensing sheet 10 is provided with a surface 111 of the first conductive totem 12; when the processing device 30 outputs an electric power, the power is input from the first transmission part 124 of the first pressure sensing sheet 10 to the first highly conductive line 121, A high conductive line 121 transmits power to the first pressure sensing area 13 of the first low conductive line 122; then, the second pressure sensing area 23 of the second pressure sensing piece 20 and the first pressure sensing piece 10 When the first pressure sensing area 13 contacts, the first pressure sensing area 13 of the first low conductive line 122 and the second pressure sensing area 23 of the second low conductive line 222 will generate a pressure sensing signal. The second high-conducting circuit 221 returns the pressure sensing signal from the second transmission unit 224 to the processing device 30. The processing device 30 compares the pressure sensing signal with a threshold value to determine the first pressure sensing piece 10 and the second Whether the pressure sensing piece 20 is resisted by the external force and the magnitude of the external force.

Furthermore, in the present creative embodiment, the pressure sensing signal is a current value; when the pressure sensing signal is greater than a critical value, the processing device 30 determines that the first pressure sensing piece 10 and the second pressure sensing piece 20 are resisted by an external force. Pressure.

To further explain, this creation provides a pressure-sensitive setting method, which is performed using the pressure-sensitive system 100. The steps of the pressure-sensitive setting method include:

First receiving signal step: the first pressure sensing piece 10 and the second pressure sensing piece 20 are superposed on each other, and the processing device 30 receives the first pressure sensing piece 10 and the second pressure sensing piece 20 without being impacted by external force. When pressing, the first pressure sensing area 13 of the first pressure sensing piece 10 is in contact with the second pressure sensing area 23 of the second pressure sensing piece 20, and an initial signal is generated by the second pressure sensing piece 20, As shown in Figure 3 and Figure 6.

Second receiving signal step: the processing device 30 receives the first pressure sensing area 13 of the first pressure sensing piece 10 and the second pressure sensing area 23 of the second pressure sensing piece 20 by the external force, and the second pressure The sensing chip 20 generates a pressure signal, as shown in FIGS. 4 and 7.

Signal processing steps: The processing device 30 processes the initial signal and the pressured signal to generate a threshold value, wherein the processing device 30 divides the sum of the initial signal and the pressured signal by a reference value to obtain the threshold value. In the embodiment, the reference value is 4, and the critical value is between the initial signal and the pressure signal and is more biased toward the end of the initial signal.

Therefore, when the creative pressure sensing system 100 is used for different purposes, the initial signals of the first pressure sensing piece 10 and the second pressure sensing piece 20 that are not resisted by external force are obtained first. Among them, it should be particularly noted that due to the A flexible substrate 11 and a second flexible substrate 21 are both flexible materials, so when they are laid flat, they may be slightly deflected, so that there is a gap between the first conductive totem 12 and the second conductive totem 22. Naturally generated gaps, therefore, will not be completely in close contact with each other to conduct the electrical signal, and the part that has contact with the conductive signal should be judged as noise at this time, so the setting of a critical value is required to eliminate the interference problem of noise; When the pressure is applied by the corresponding application, these gaps will disappear after being squeezed, so that the first conductive totem 12 and the second conductive totem 22 are in close contact with each other, thereby obtaining the first pressure sensing sheet 10 and the second pressure sensing. The tablet 20 is pressed by an external force, and the processing device 30 processes the initial signal that is not pressed by the external force and the compressed signal that has been pressed by the external force, so as to generate a specific threshold value, and set the specific threshold value. Set it as the best judgment standard; then, use the dedicated threshold value for subsequent corresponding uses to produce accurate measurement results. It should be particularly noted that if this system is placed on a mattress to meet the user conditions of different body types, with a special threshold setting, a lower threshold value can be obtained when the user size is small. Can improve the sensitivity to avoid the problem of missed detection; and in the case of larger users, the higher threshold value can avoid the problem of noise interference affecting the actual measurement accuracy. The magnitude of the pressure signal can be used to determine the pressure of the external force.

Example: When the creative pressure sensing system 100 is applied to medically detect whether a patient is lying in the same posture for a long time, the first pressure sensing piece 10 and the second pressure sensing piece 20 can be placed on a mattress, and the patient is not lying on the Before the mattress, the initial signal is obtained first; when the patient lies on the mattress, the pressure signal is obtained; and then, the critical value dedicated to the patient is processed through the processing device 30.

Please refer to FIG. 8, which is the second embodiment of the present invention. The difference from the foregoing embodiment is that the pressure sensing system 100 further includes:

The first pressure sensing sheet 10 is provided with a plurality of first conductive totems 12, each of which has a first transmission portion 124, and each of the first transmission portions 124 is electrically connected to the processing device 30 independently. The two ends of the first transmission part 124 are respectively connected to the processing device 30 and each of the first conductive totems 12. In this creative embodiment, each of the first conductive totems 12 is spaced along the longitudinal and lateral directions of the first pressure sensing sheet 10. Array arrangement.

The second pressure sensing piece 20 is provided with a plurality of second conductive totems 22, and each of the second conductive totems 22 has a second transmission part 224, and each of the second transmission parts 224 is electrically connected to the processing device 30 independently. The two ends of the second transmission part 224 are respectively connected to the processing device 30 and each of the second conductive totems 22. In the present creative embodiment, each of the second conductive totems 22 is spaced along the longitudinal and lateral directions of the second pressure sensing piece 20 Array arrangement; in this embodiment, the structure of the second pressure sensing piece 20 is the same as that of the first pressure sensing piece 10, so only the relevant reference numerals of the first pressure sensing piece 10 are marked in FIG.

Therefore, the first pressure sensing sheet 10 and the second pressure sensing sheet 20 can increase the number of the first conductive totems 12 and the second conductive totems 22 according to the requirements of the measurement area, and pass through the first conductive totems 12 and the second When the conductive totem 22 is under pressure, the pressure sensing signals are transmitted back to the processing device 30 through each of the second transmission parts 224, so as to determine different pressure parts and areas, so as to achieve the effect of detecting pressure changes in different ranges.

Example: When the creative pressure sensing system 100 is applied to medically detect whether a patient is lying in the same posture for a long time, the first pressure sensing piece 10 and the second pressure sensing piece 20 can be placed on a mattress, and the patient lies on a bed After padding, it can be known through the pressure sensing signals returned by each second transmission unit 224 that the pressure sensing signals returned by the first conductive totem 12 and the second conductive totem 22 that are close to the upper body are greater than those of the other parts. The conductive totem 12 and the second conductive totem 22 return pressure sensing signals under pressure, so it can be known that the main weight of the patient is concentrated on the upper body, so as to achieve the effect of judging different pressure parts and areas.

Please refer to FIG. 9 to FIG. 11, which is the third embodiment of the present invention. The difference from the foregoing embodiment lies in:

The first pressure sensing sheet 10 has a plurality of first conductive totems 12, each first conductive totem 12 is arranged in a two-dimensional array, and the first transmission parts 124 of each first conductive totem 12 are connected to each other in a first direction; In the embodiment, each of the first conductive totems 12 is connected to the first row, the second row, and the third row in the direction of the drawing of FIG. 9 from top to bottom, and the processing device 30 will sequentially send signals to each row. The first conductive totem 12 is electrically conductive due to the electrical connection of the first transmission portion 124 in each column.

The second pressure sensing sheet 20 has a plurality of second conductive totems 22, each of the second conductive totems 22 is arranged in a two-dimensional array, and the second transmission portions 224 of each of the second conductive totems 22 are connected to each other in a second direction, the first direction Intersecting with the second direction, in this creative embodiment, in the drawing direction of FIG. 9, from left to right, the second conductive totems 22 are connected to the first row, the second row, and the third row, respectively. In this embodiment, the second conductive totems 22 of each row are electrically connected to the processing device 30 through the second transmission portion 224, and are used to return the electrical signals to the processing device 30.

The first pressure sensing sheet 10 and the second pressure sensing sheet 20 are superimposed on each other, and when the first pressure sensing sheet 10 and the second pressure sensing sheet 20 are pressed into contact with each other, the pressed first conductive The totem 12 and the second conductive totem 22 are electrically connected, and the signals sent from the processing device 30 flow through the first conductive totem 12 and the second conductive totem 22, and then return to the processing device 30 to determine the pressure position.

Example: Please refer to FIG. 9 and FIG. 11. When the first pressure sensing piece 10 and the second pressure sensing piece 20 are pressed by the external force S, the first pressure sensing piece 10 and the second pressure sensing piece 20 are pressed by the first in the center of the second column. The conductive totem 12 is electrically connected to the second conductive totem 22 in the center of the second row. The processing device 30 can receive the second conductive totem 22 times only when the signal sent by the first conductive totem 12 is pressed by the external force S. The feedback transmitted to the processing device 30, and other first conductive totems 12 and second conductive totems 22 that are not resisted by the external force S receive the initial signals. Therefore, according to the responding first conductive totem 12 and the second conductive totem 22, the compressed position is known, and the area pressed by the external force S is a single first conductive totem 12 and the second conductive totem 22 are superimposed. Part of the area, and so on. When multiple conductive totems are simultaneously resisted by external forces, the processing device 30 can also make multiple location compression judgments through the feedback source and signal strength received at the same time.

With the above, the effects that this creation can achieve are as follows:

1. The creative pressure sensing system 100 with a simple structure combined with the threshold value setting and judgment of the processing device 30 can effectively avoid the generation of measurement error signals. To improve the knowledge, complex structures can be used to avoid the disadvantages of measurement errors. Therefore, the manufacturing process and cost of the first pressure sensing piece 10 and the second pressure sensing piece 20 can be effectively reduced.

2. This work transmits power to the first low conductive line 122 through the first high conductive line 121, and the second pressure sensing in the first pressure sensing area 13 of the first low conductive line 122 and the second low conductive line 222 When the areas 23 are in contact with each other, a pressure sensing signal is generated, and the pressure sensing signal is transmitted back to the processing device 30 through the second high conductive line 221 for subsequent processing and judgment, thereby improving the measurement sensitivity through the design of the high and low conductive lines. And accuracy.

Third, the creation of the first insulation layer 123 and the second insulation layer 223 to avoid the first high conductive line 121 and the second high conductive line 221 due to contact with each other and the problem of excessive current consumption, on the one hand to avoid power loss Seriously, on the other hand, it is also possible to avoid the situation that the pressure sensing signal is directly transmitted by the first high conductive line 121 and the second high conductive line 221 and the measurement is not accurate.

4. The first conductive totem 12 and the second conductive totem 22 of this creation are formed on the first pressure sensing piece 10 and the second pressure sensing piece 20 by a printed circuit, so that the first pressure sensing piece 10 and the second pressure The sensing sheet 20 is a flat sheet. When the first pressure sensing sheet 10 and the second pressure sensing sheet 20 are used for pressure detection of wearing or medical testing, it can make the user feel free of foreign objects and provide comfort during use. Sex.

Fifth, this creation processes the initial signal that has not been resisted by external forces and the pressure signal that has been resisted by external forces to generate a critical value as the best judgment basis; thereby, it can provide exclusive thresholds for different purposes. To improve the accuracy of the measurement.

6. This creation can increase the number of conductive totems on the pressure-sensing sheet according to the requirements of the measurement area, and when each conductive totem is under pressure, the transmission unit returns the pressure-sensing signal to the processing device 30 to determine the impact. Pressure part and area to achieve the effect of detecting pressure changes in different ranges.

The above-mentioned embodiments are only used to describe the creation, and are not intended to limit the scope of the creation. Various modifications or changes that are not in violation of the spirit of this creation are all within the scope of this creative intention.

100‧‧‧ Pressure Sensing System

21‧‧‧Second flexible substrate

10‧‧‧ the first pressure sensor

211‧‧‧ surface

11‧‧‧The first flexible substrate

22‧‧‧Second conductive totem

111‧‧‧ surface

221‧‧‧ the second highest conductive line

12‧‧‧ the first conductive totem

222‧‧‧Second Low Conductive Circuit

121‧‧‧ the first highest conductive line

222a‧‧‧Second coverage area

122‧‧‧The first low conductive line

222b‧‧‧Second layout area

122a‧‧‧First coverage area

223‧‧‧Second insulation layer

122b‧‧‧First layout area

224‧‧‧Second Transmission Department

123‧‧‧first insulating layer

23‧‧‧Second pressure sensing area

124‧‧‧First Transmission Department

30‧‧‧Processing device

13‧‧‧ the first pressure sensing area

S‧‧‧ external force

20‧‧‧Second pressure sensor

FIG. 1 is a schematic diagram of a system of the first embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of a first type of pressure sensing piece according to the first embodiment of the present invention, showing that the first highly conductive circuit is directly connected to the first insulating layer.
FIG. 3 is a schematic diagram of the first type of the first pressure sensing piece and the second pressure sensing piece of the first embodiment of the present invention being uncompressed.
FIG. 4 is a schematic diagram illustrating the pressure of the first pressure sensing piece and the second pressure sensing piece in the first form of the first embodiment of the present invention.
FIG. 5 is a schematic cross-sectional view of a first pressure sensing piece of a second type of the first embodiment of the present invention, showing that a first low-conductivity circuit is provided between a first high-conductivity circuit and a first insulation layer.
FIG. 6 is a schematic diagram of the first pressure sensing piece and the second pressure sensing piece of the second type of the first embodiment of the present invention being uncompressed.
FIG. 7 is a schematic diagram of the pressure of the first pressure sensing piece and the second pressure sensing piece of the second type of the first embodiment of the present invention.
FIG. 8 is a schematic diagram of the system of the second embodiment of the present invention.
FIG. 9 is a schematic diagram of a system according to a third embodiment of the present invention.
FIG. 10 is a schematic diagram of interconnection between a first pressure sensing piece and a second pressure sensing piece according to the third embodiment of the present invention.
FIG. 11 is a schematic view showing that the first pressure sensing piece and the second pressure sensing piece are superimposed on each other and pressed under the third embodiment of the present invention.

Claims (8)

A pressure sensing system comprising:
A first pressure sensing sheet having a first flexible substrate and a first conductive totem, the first conductive totem is disposed on a surface of the first flexible substrate;
A second pressure sensing sheet having a second flexible substrate and a second conductive totem, the second conductive totem is disposed on the surface of the second flexible substrate, wherein the second pressure sensing sheet is One side of the second conductive totem is provided on the first pressure sensing sheet, and one side of the first conductive totem is provided; and a processing device, the first pressure sensing sheet, and the second pressure sensing The chip is electrically connected, the processing device outputs a power to the first pressure sensing sheet, and a pressure sensing signal is obtained from the second pressure sensing sheet, and the pressure sensing signal is compared with a threshold value to determine Whether the first pressure sensing piece and the second pressure sensing piece are pressed by an external force. The pressure sensing system according to claim 1, wherein the first conductive totem has a first high conductive line and a first low conductive line electrically connected to one of the first high conductive lines, and the first low conductive line is provided by the The first highly conductive circuit extends and forms a first pressure sensing region on the first flexible substrate. The area of the first pressure sensing region is larger than that occupied by the first highly conductive circuit on the first flexible substrate. Area; the second conductive totem has a second high conductive line and a second low conductive line electrically connected to one of the second high conductive lines, the second low conductive line extends from the second high conductive line and is on the second A second pressure sensing region is formed on the flexible substrate, and the area of the second pressure sensing region is larger than the area occupied by the second highly conductive circuit on the second flexible substrate. The pressure sensing system according to claim 2, wherein the first low-conductivity circuit is divided into a first coverage area and a first layout area, and the first coverage area is disposed on the first high-conductivity line away from the first coverage area. On one side of the flexible substrate, the first layout area is disposed on the first flexible substrate; the second low-conducting circuit is divided into a second coverage area and a second layout area, and the second coverage area is disposed on the first Two high-conducting circuits are far from one side of the second flexible substrate, and the second layout area is disposed on the second flexible substrate. The pressure sensing system according to claim 3, wherein the first pressure sensing sheet further has a first insulating layer, and the first insulating layer covers the first highly conductive line away from one of the first flexible substrates. The second pressure sensing sheet further has a second insulating layer, and the second insulating layer covers one side of the second highly conductive circuit away from the second flexible substrate. The pressure sensing system according to claim 4, wherein the first insulation layer covers the first coverage area; and the second insulation layer covers the second coverage area. The pressure sensing system according to claim 1, wherein the number of the first conductive totems is plural, and each first conductive totem has a first transmission part, and each first transmission part is electrically connected to the processing device independently. , Two ends of each first transmission section are respectively connected to the processing device and each first conductive totem; the number of the second conductive totems is plural, each second conductive totem has a second transmission section, each The second transmission part is electrically connected to the processing device independently, and two ends of each second transmission part are respectively connected to the processing device and each second conductive totem. The pressure sensing system according to claim 1, wherein the number of the first conductive totems is plural, and each first conductive totem has a first transmission part, and each of the first conductive totems is arranged in a two-dimensional array, each The first transmission totems of the first conductive totem are connected to each other along a first direction; the number of the second conductive totems is plural, and each of the second conductive totems has a second transmission totem. The two-dimensional array is arranged, and the second transmission parts of each of the second conductive totems are connected to each other along a second direction, and the first direction and the second direction cross each other. The pressure sensing system according to claim 1, wherein the pressure sensing signal is a current value; when the pressure sensing signal is greater than the threshold value, the processing device determines the first pressure sensing piece and the second pressure sensing The test piece was pressed by external force.