WO2017190399A1

WO2017190399A1 - Pressure sensing module, terminal, and image display method and apparatus

Info

Publication number: WO2017190399A1
Application number: PCT/CN2016/085057
Authority: WO
Inventors: 姜佳欣
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-05-06
Filing date: 2016-06-07
Publication date: 2017-11-09
Also published as: CN107346188B; CN107346188A

Abstract

A pressure sensing module, a terminal, and an image display method and apparatus. The pressure sensing module comprises two or more pressure sensing resistors, and the pressure sensing resistors have the characteristic that a resistance value changes with the change of pressure. According to the present invention, the problems existing in the relevant art, such as a complex pressure sensing module structure, difficult assembling and poor usage effect, are solved, thereby reducing the structure and mounting complexity of a pressure sensing module, and enhancing the usage effect of the pressure sensing module.

Description

Pressure sensing module, terminal, image display method and device

Technical field

The present invention relates to the field of communications, and in particular to a pressure sensing module, a terminal, an image display method and apparatus.

Background technique

In the related art, the pressure sensing module is mostly capacitive or resistive, and is usually mounted on the back of the display device, the upper surface of the front case, or the frame support.

For example, a terminal is a pressure sensitive touch-sensitive Forcetouch film attached to a layer of stainless steel sheet, and is installed between the display screen and the supporting steel sheet. The self-capacitance scheme is adopted, and the deformation of the Forcetouch film changes the capacitance, and the capacitance is detected. The amount of change in value identifies the magnitude of the pressure signal.

A terminal is a pressure sensitive film attached on the back of the display module. The copper block on the film layer forms a sensing capacitance with the metal middle frame. When the screen is deformed by the pressure, the distance changes to change the capacitance, and the capacitance value is changed by measuring the capacitance value. Get pressure information.

There is also a terminal based on a resistor scheme in which four rectangular pressure-sensing sensors are attached to the front case, and a pressure-sensitive resistor is attached to the sensor, and each sensor is connected by a flexible printed circuit (FPC) and the signal is connected. Integrated transfer to the motherboard. When there is pressure, the deformation of the front shell changes the resistance value, and the pressure is recognized by detecting the change in the resistance value.

However, current capacitor-based technical solutions are relatively expensive, have long production cycles, are difficult to assemble, and require high flatness of the front shell. The pressure-sensing sensors are arranged according to the structure of the front shell and hollowing out, and cannot be evenly distributed, and When the pressure is too large, nonlinear response and pressure-induced failure are prone to occur. The point resistance scheme needs to be slotted on the front casing, which will affect the structural strength of the whole machine.

The above-mentioned pressure sensing module existing in the related art has complicated structure, difficult assembly, and poor use effect, and no effective solution has been proposed yet.

Summary of the invention

The invention provides a pressure sensing module, a terminal, an image display method and a device, and at least solves the problems of the capacitive pressure sensor and the resistance pressure sensor in the related art.

According to an aspect of the invention, there is provided a pressure sensing module comprising two or more pressure sensing resistors, the pressure sensing resistor having a characteristic that a resistance value changes with a change in pressure.

Optionally, the two or more pressure sensing resistors are arranged in M rows and N columns, and the R pressure sensing resistors in the pressure sensing resistors of the M rows and N columns form a differential bridge, wherein the difference is The moving bridge is used to determine the resistance change value of the two or more pressure sensing resistors, wherein the M, N, and R are positive integers, and the M*N/R is also a positive integer.

Alternatively, the M=8, N=4, and R=8.

Optionally, the pressure sensing resistor is a pressure sensing ink, and the pressure sensing ink has at least one of the following features: a printing area of the pressure sensing ink ranges from 2 to 5 mm ² ; and the shape of the pressure sensing ink is The symmetrical shape includes: square, circular or triangular; the two pressure-sensitive inks are arranged in the longitudinal direction in the range of 10 mm to 20 mm; the two pressure-sensitive inks are arranged in the width direction in the range of 15 mm to 25 mm.

Optionally, when the shape of the pressure sensing ink is square, the pressure sensing ink is a rectangle of 1 mm*3 mm, and/or the pressure sensing ink has a thickness ranging from 5 nm to 15 nm.

According to another aspect of the present invention, a terminal includes a touch panel, a display module, and the pressure sensing module according to any one of the above, wherein the touch panel is configured to determine a touch position of the touch terminal The pressure sensing module is configured to determine a touch force of the touch terminal, and the display module is configured to display an image according to the touch position and the touch velocity.

According to another aspect of the present invention, an image display method includes: acquiring a touch position of a touched terminal from a touch panel on a terminal, and acquiring a touched terminal from a pressure sensing module of the terminal a touch force, wherein the pressure sensing module is composed of two or more pressure sensing resistors, wherein the pressure sensing resistor has a characteristic that a resistance value changes with a change in pressure; and an image is displayed according to the touch position and the touch force .

Optionally, acquiring the touch force of the terminal from the pressure sensing module of the terminal includes: determining a resistance change value of the two or more pressure sensing resistors; determining, according to the resistance change value Touch the touch.

Optionally, the two or more pressure sensing resistors are arranged in M rows and N columns, and the R pressure sensing resistors of the M rows and N columns of pressure sensing resistors form a differential bridge, and the M, N, R is a positive integer, and M*N/R is also a positive integer. Determining the resistance change value of the two or more pressure sensing resistors includes: determining a voltage change value of the differential bridge; and changing according to the voltage The value determines the resistance change value.

According to another aspect of the present invention, an image display apparatus is provided, including: an acquisition module, configured to acquire a touch position of a touched terminal from a touch panel on a terminal, and from a pressure sensing module of the terminal Obtaining a touch force touching the terminal, wherein the pressure sensing module is composed of two or more pressure sensing resistors, wherein the pressure sensing resistor has a characteristic that a resistance value changes according to a change of a pressure; and a display module is used according to the The touch position and the touch velocity display an image.

Optionally, when acquiring the touch force of the terminal from the pressure sensing module of the terminal, the acquiring module includes: a first determining unit, configured to determine the two or more pressure sensing a resistance change value of the resistor; a second determining unit configured to determine the touch force according to the resistance change value.

Optionally, the two or more pressure sensing resistors are arranged in M rows and N columns, and the R pressure sensing resistors in the pressure sensing resistors of the M rows and N columns form a differential bridge, and the M and N are And R is a positive integer, and the M*N/R is also a positive integer. The first determining unit includes: a first determining subunit, configured to determine a voltage change value of the differential bridge; And a subunit, configured to determine the resistance change value according to the voltage change value.

Through the invention, the pressure sensing module composed of two or more pressure sensing resistors is used for pressure sensing, which can solve the problems of complicated structure, difficult assembly and poor use effect of the pressure sensing module existing in the related art, thereby achieving the pressure reduction. The structure and installation complexity of the sensing module enhance the use of the pressure sensing module.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of an image display method according to an embodiment of the present invention;

2 is a block diagram showing the structure of an image display device according to an embodiment of the present invention;

3 is a block diagram showing the structure of an acquisition module 22 in an image display device according to an embodiment of the present invention;

4 is a block diagram showing the structure of a first determining unit 32 in an image display device according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a pressure sensing touch display device according to an embodiment of the invention; FIG.

6 is a schematic diagram of another pressure sensing touch display device according to an embodiment of the invention;

7 is a schematic structural view of a pressure sensing film layer according to an embodiment of the present invention;

Figure 8 is a schematic illustration of a differential bridge in accordance with an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

With the popularity of smart devices, smart terminals with touch functions such as mobile phones and tablet computers are becoming more and more important in people's lives. At present, human-computer interaction mainly relies on touch screen input, but the conventional capacitive touch screen can only provide two-dimensional coordinates of touch points. With the increasing variety of various terminal applications, the functions are increasingly powerful, and the planar operation obviously cannot meet the diversified operational requirements of people. It is customary that the pressure-sensing touch screen can provide three-dimensional information input, which allows people to interact with the device with a degree of freedom and create a better experience. Therefore, pressure sensing technology is imperative. In the related art, some pressure sensing modules for inductive pressure are gradually appeared, but the pressure sensing module in the related art may have the problems of complicated structure, difficult assembly, and poor use effect, and how to combine the embodiments of the present invention Solve the above problems to explain.

According to an embodiment of the present invention, a pressure sensing module is provided. The pressure sensing module includes two or more pressure sensing resistors, and the pressure sensing resistor has a characteristic that a resistance value changes with a change in pressure. In this embodiment, the pressure sensing module is composed of a plurality of pressure sensing resistors, and the resistance values of the pressure sensing resistors can be changed according to the change of the pressure, and therefore, can be determined according to the change of the resistance value of the pressure sensing resistor. The size of the pressure. The use of a pressure sensing module consisting of two or more pressure sensing resistors can reduce the structural complexity and assembly difficulty of the pressure sensing module, and even if the pressure value is too large, there will be no nonlinear response and aging conditions, effectively improving The effect of the pressure sensing module.

In an optional embodiment, the two or more pressure sensing resistors are arranged in M rows and N columns, and the R pressure sensing resistors in the pressure sensing resistors of the M rows and N columns form a differential bridge, wherein The differential bridge is used to determine the resistance change value of two or more pressure sensing resistors, and M, N, and R are positive integers, and the M*N/R is also a positive integer. (That is, the total number of pressure sensing resistors is an integral multiple of the number of pressure sensing resistors that make up the differential bridge). In this embodiment, one end of a differential bridge is connected with a voltage V, and the other end is grounded. When there is pressure, the change of the resistance value causes the voltage difference U between the two points of the differential bridge to change, and the subsequent circuit is passed. The magnitude of the pressure can be calculated by measuring the change of U. Moreover, the sensitivity of the differential bridge is high, the nonlinear error is small, and the same symbol interference is compensated, so that the measurement of the pressure is more accurate.

In an alternative embodiment, the above M = 8, N = 4, R = 8. That is, the pressure sensing module includes 32 pressure sensing resistors, and the 32 pressure sensing resistors are arranged in 8 rows and 4 columns, and each of the 8 resistors forms a differential bridge, and there are 4 bridges. It should be noted that the foregoing arrangement and the composition of the differential bridge are only a preferred embodiment. The number of the pressure sensing resistors in the pressure sensing module may be other numbers, for example, 24 pressures. The sensing resistor, or 48 pressure sensing resistors, and the arrangement of the pressure sensing resistors can also be of various types, and the specific arrangement manner can be arranged according to the size of the terminal or the size of the pressure sensing module. The number of the pressure sensing modules constituting the differential bridge may be four or six, and the number of the pressure sensing modules constituting the differential bridge is preferably four or more.

In an optional embodiment, the pressure sensing resistor is a pressure sensing ink, that is, the pressure sensing module has a plurality of pressure sensing inks, and the pressure sensing ink has at least one of the following characteristics: the pressure sensing ink The printing area ranges from 2 to 5 mm ² ; the shape of the pressure-sensitive ink is symmetrical, including: square, circular or triangular; the two pressure-sensitive inks are arranged in the longitudinal direction in the range of 10 mm to 20 mm; The arrangement pitch of the inductive ink in the width direction ranges from 15 mm to 25 mm. Wherein, the arrangement speed of the two pressure-sensitive inks in the longitudinal direction may be preferably 13 mm, and the arrangement speed of the two pressure-sensitive inks in the width direction may be 22 mm. It should be noted that the values of the foregoing numerical values are only a few preferred embodiments, and other values may be taken according to actual conditions.

In an optional embodiment, when the shape of the pressure sensing ink is square, the pressure sensing ink may be a rectangle of 1 mm*3 mm, and/or the pressure sensing ink may have a thickness ranging from 5 nm to 15 nm. In the present embodiment, the optimum thickness of the pressure-sensitive ink may be 10 nm. It should be noted that the values of the side length and the thickness of the pressure-sensitive ink in this embodiment are only a few preferred embodiments, and other values may be used.

According to an embodiment of the present invention, a terminal includes a touch panel, a display module, and a pressure sensing module according to any one of the above, wherein the touch panel is used to determine a touch position of the touch terminal, the pressure The sensing module is configured to determine a touch force of the touch terminal, and the display module is configured to display an image according to the touch position and the touch velocity. The terminal is described below:

When the finger is pressed against the surface of the touch screen of the terminal, the surface is slightly deformed, and the pressure sensing film layer corresponding to the back surface of the display module (corresponding to the above-mentioned pressure sensing module) is electrically deformed due to deformation (resistance, capacitance, etc.) ) Change, by detecting the amount of change in the electrical signal, the pressure on the surface of the touch screen can be measured.

The pressure sensing touch display module in the terminal comprises a touch display module (ie, the above touch panel and display module) and a pressure sensing film layer. When the user operates the pressure sensing touch screen, the touch panel (eg, capacitive touch screen) will feed back the two-dimensional coordinates of the operating point, the pressure sensing layer feedback operation pressure, the display module position and pressure Respond to display different images to complete the human-computer interaction process.

The touch display module may be a split capacitive touch screen and a liquid crystal display module (LCM) or an organic light-emitting diode (OLED), or a touch and A device that displays an external on-cell or an in-cell structure that is integrated with the function.

The substrate of the pressure sensing film layer may be a layer of flexible insulating material, which may be a polymer such as polycarbamide, polyester (PET) or polyethylene naphthalate (PEN), and the pressure sensitive ink is printed on the substrate. And copper traces, pressure sensitive ink can be composed of high-density polyethylene, graphite semiconductor composites, etc., connected by gold fingers and copper traces, all devices are covered with a shielding film.

The electrical characteristics of the above pressure-sensing inks vary with the magnitude of the pressure, and are linearly correlated within a certain range, and the pressure values are obtained by subsequent circuits and algorithms.

The size, number, and arrangement of pressure-sensitive inks should be determined based on the size of the touch screen and the desired pressure sensitivity.

The above terminal may further comprise a double-sided tape, a foam glue or a water glue for bonding the pressure sensing film and the touch display module.

The terminal may further comprise a foam for isolating and buffering, which may be attached to the side of the pressure sensing film layer away from the touch display module, or may be attached to the surface of the front case close to the pressure sensing module, and the thickness of the foam depends on the thickness of the foam. The gap between the pressure touch display and the front case and the amount of pressure applied to the surface of the touch screen.

In the embodiment of the present invention, an image display method is provided. FIG. 1 is a flowchart of an image display method according to an embodiment of the present invention. As shown in FIG. 1 , the process includes the following steps:

Step S102: Acquire a touch position of the touch terminal from the touch panel on the terminal, and obtain a touch force of the touch terminal from the pressure sensing module of the terminal, where the pressure sensing module is composed of two or more pressure sensing resistors, The pressure sensing resistor has a characteristic that the resistance value changes with the change of the pressure;

Step S104, displaying an image according to the touch position and the touch velocity.

Wherein, the above operation may be performed by the terminal. In this embodiment, the pressure sensing module for determining the touch force is composed of two or more pressure sensing resistors, and the resistance values of the pressure sensing resistors can be changed according to the pressure, so that the pressure sensing can be performed according to the pressure. The change in the resistance value of the resistor determines the magnitude of the pressure. The use of a pressure sensing module composed of two or more pressure sensing resistors can reduce the structural complexity and assembly difficulty of the pressure sensing module, and in the range of large pressure values, there is no nonlinear response and failure. Effectively improve the use of pressure sensing modules.

In an optional embodiment, obtaining the touch force of touching the terminal from the pressure sensing module of the terminal comprises: determining a resistance change value of the two or more pressure sensing resistors; and determining a touch force according to the resistance change value. In the present embodiment, since the resistance value of the pressure sensing resistor changes with the change of the pressure, the pressing force value can be determined according to the characteristic of the pressure sensing resistor.

In an optional embodiment, the two or more pressure sensing resistors are arranged in M rows and N columns, and the R pressure sensing resistors in the pressure sensing resistors of the M rows and N columns form a differential bridge. , N, R are positive integers, And satisfying that M*N/R is also a positive integer, determining the resistance change value of the two or more pressure sensing resistors includes: determining a voltage change value of the differential bridge; and determining a resistance change value according to the voltage change value.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

An image display device is also provided in the embodiment, which is used to implement the above-mentioned embodiments and preferred embodiments, and will not be described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a block diagram showing the structure of an image display apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes an acquisition module 22 and a display module 24. The apparatus will be described below.

The obtaining module 22 is configured to obtain, by using a touch panel on the terminal, a touch position of the touch terminal, and obtain a touch force of the touch terminal from the pressure sensing module of the terminal, where the pressure sensing module is composed of two or more pressures The sensing resistor comprises a characteristic that the resistance value changes according to the change of the pressure; the display module 24 is connected to the obtaining module 22 for displaying an image according to the touch position and the touch velocity.

3 is a block diagram showing the structure of the acquisition module 22 in the image display device according to the embodiment of the present invention. As shown in FIG. 3, when acquiring the touch force of the touch terminal from the pressure sensing module of the terminal, the acquisition module 22 includes A determining unit 32 and a second determining unit 34, the obtaining module 22 is described below:

The first determining unit 32 is configured to determine the resistance change value of the two or more pressure sensing resistors; the second determining unit 34 is connected to the first determining unit 32, and is configured to determine the touch force according to the resistance change value.

In an optional embodiment, the two or more pressure sensing resistors are arranged in M rows and N columns, and the R pressure sensing resistors in the pressure sensing resistors of the M rows and N columns form a differential bridge. N, R are positive integers, and M*N/R is also a positive integer. 4 is a block diagram showing the structure of the first determining unit 32 in the image display device according to the embodiment of the present invention. As shown in FIG. 4, the first determining unit 32 includes a first determining subunit 42 and a second determining subunit 44. The first determining unit 32 is described as follows:

The first determining subunit 42 is configured to determine a voltage change value of the differential bridge; the second determining subunit 44 is coupled to the first determining subunit 42 for determining a resistance change value according to the voltage change value.

The present invention will be described below in conjunction with specific embodiments:

A pressure sensing touch display device is provided in an embodiment of the invention. As shown in FIG. 5, the pressure sensing touch display module in the embodiment of the present invention includes a touch screen panel 1 (corresponding to the above touch panel), a display module 2, a pressure sensing film layer 3, an isolation buffer foam 4, and a connection circuit. (The connection circuit is not shown in Fig. 5). When the touch screen receives the pressing force, the touch screen panel 1 will feed back the two-dimensional coordinates of the operating point, and the pressure sensing film layer 3 feeds back the pressure of the operation. The connection circuit is configured to transmit the coordinate position and the pressure value to the processor, and transmit the instructions of the processor to the display module 2. The display module 2 is configured to display different images and complete human-computer interaction. The isolating buffer foam 4 is used to prevent the pressure sensing film layer 3 from being in contact with the front case due to the deformation amount being too large, thereby causing the pressure sensing function to fail, and absorbing the vibration of the electronic component on the other side of the front case to prevent the signal of the pressure sensing film layer from being caused. The interference buffer foam 4 may be attached to the back surface of the pressure sensing film layer 3 or to the side of the front case adjacent to the pressure sensing film layer 3.

The touch panel panel 1 includes a protective cover, a film with a plurality of driving electrodes and sensing electrodes, and may be a glass-film (Cover glass+Film Sensor+Multi ITO, GFM for short) structure, and a glass-film-film (Cover). Glass+Film Sensor+Film Sensor (referred to as GFF) structure, single glass solution (One Glass Solution, OGS for short). The touch screen panel 1 can realize multi-touch operation through capacitive coupling, and the chip is located on the FPC, connected to the FPC of the display module 2 through the electrode contact or directly connected to the main board.

The above display module 2 may be a liquid crystal display (LCD), an organic light emitting diode (OLED) or other display module having a light emitting display function material, and the optical adhesive (OCA) Or a frame-shaped foam is attached to the touch screen panel 1. The chip of the display module 2 is located on the FPC and is connected to the main board through electrode contact.

In an optional embodiment, as shown in FIG. 6, the protective cover, the touch screen panel and the display module may be integrated into one component 5, which may be a touch sensor on-cell or a touch sensor. In-cell structure. Component 5 has both touch and display functions, and the control chip can be located on the FPC and connected to the motherboard through electrode contacts.

As shown in FIG. 7, the substrate of the pressure sensing film layer 3 may be a layer of flexible insulating material, which may be a high polymer (PET), etc., the substrate is printed with a pressure sensitive ink and a copper trace, and the pressure is applied. The ink can be composed of high-density polyethylene, graphite semiconductor composites, etc., connected by gold fingers and copper traces, and the surface of all devices is covered with a shielding film.

The pressure control chip of the pressure sensing film layer 3 may be located on the FPC of the display module 2 or the component 5, or may be located on the main board. The pressure signal can be output to the main board through the electrode connector 7. The pressure-sensitive film layer 3 can be attached to the back surface of the display module 2 or the component 5 by double-sided tape, foam glue or water glue.

The resistance characteristic of the pressure-sensitive ink 6 on the pressure-sensitive film layer 3 varies with the magnitude of the pressure, and is linearly correlated within a certain range. When a force acts on the screen, the deformation of the elastomer such as the screen changes the resistance of the pressure-sensitive ink 6, and the small change of the resistance is converted into a voltage change by the Wheatstone bridge circuit, and then the voltage change is amplified by the amplifier. The processed signal is sent to a processor (Management Control Unit, MCU for short) for arithmetic processing.

The pressure sensing film layer 3 may have 32 pressure sensitive resistors (corresponding to the above-mentioned pressure sensing resistors, which may be simply referred to as resistors) (of course, other numbers of pressure sensitive resistors), arranged in 8 rows and 4 columns, each of which is arranged in 8 rows and 4 columns. Eight resistors form a differential bridge with a total of four bridges. Figure 8 is a schematic diagram of a differential bridge on a pressure-sensing film layer. Two pressure-sensitive resistors form an arm 8 of the bridge, and four arms form a bridge, one end is applied with a voltage V and the other end is grounded. When there is pressure, the change of the resistance value will change the voltage difference U between the two points. The magnitude of the pressure can be calculated by the change of U measured by the subsequent circuit. The differential bridge has higher sensitivity, less nonlinear error, and has the same effect on the same symbol interference. In fact, the eight pressure-sensitive resistors of a bridge are not necessarily arranged together, and can be based on pressure distribution and required spirit. Sensitivity is flexibly arranged. In order to ensure the accuracy and sensitivity of the bridge, the resistance value of each pressure sensitive ink is required to be consistent, and the difference in resistance is not more than 5%.

The pressure resistance (for example, the pressure sensing ink 6) material is related to the resistivity, the printing area, the ink thickness and the like. The specific resistance can refer to the impedance matching of the subsequent processing circuit. In an optional embodiment, the monolithic pressure is applied. The printing area of the ink can be changed between 2 and 5 mm ² (unit: square mm), and the shape can be a symmetrical shape such as a rectangle, a circle or a triangle. The best shape is a rectangle of 1 mm * 3 mm (unit: mm), and the thickness of the ink is Between 5 nm and 15 nm (unit: nanometer), preferably 10 nm, the arrangement pitch of the two pressure sensitive inks in the longitudinal direction is between 10 mm and 20 mm (unit: mm), preferably 13 mm, in the width direction. The arrangement pitch is between 15 mm and 25 mm (unit: mm), preferably 22 mm.

Pressure-sensitive ink 6 is a special piezoelectric material that converts pressure changes into changes in resistance. Compared to conventional pressure resistors, this new material has the advantage of smaller size and higher sensitivity, and does not need to be with the front shell or The screen forms a sensing capacitor, so the requirements for the flatness and integrity of the front case are greatly reduced, and the front cover solution can be adapted to more forms, and the application is more flexible.

Wherein, the pressure sensing ink 6 on the pressure sensing film layer 3 can be arranged at random, not necessarily uniformly distributed, and can also be flexibly set according to the FPC routing on the back of the display module 2 and the front shell device avoidance, and then pass through The algorithm performs a software correction on the pressure value.

The pressure processing chip and the electronic component may be arranged on the FPC of the pressure sensing film layer 3, or may be arranged on the FPC of the touch display module or on the main board, and the specific form may be determined according to the system design of the whole machine.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1, obtaining a touch position of the touch terminal from the touch panel on the terminal, and acquiring a touch force of the touch terminal from the pressure sensing module of the terminal, wherein the pressure sensing module is composed of two or more pressure sensing resistors, the pressure The sense resistor has a characteristic that the resistance value changes with the change of the pressure;

S2, displaying an image according to the touch position and the touch velocity described above.

Optionally, in the embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM). A variety of media that can store program code, such as a hard disk, a disk, or an optical disk.

Optionally, in the embodiment, the processor performs the above steps according to the stored program code in the storage medium.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

The technical solution in the embodiment of the invention has the advantages of simple manufacture, convenient assembly, sensitive pressure sensing, etc., and can obtain the pressure value on the screen in real time. By calibrating the sensor, a linear output of the pressure value can be achieved over a range of pressures. Pass Over-interpolation fitting algorithm can realize the pressure value at any point of the sensing screen. The touch display structure with pressure sensing function provided by the embodiment of the invention can not only sense the touch position but also feedback the touch pressure, and solves the complicated structure, difficult assembly, low sensitivity, nonlinear response and easy saturation of other pressure sensing schemes. And other issues.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The invention is applicable to the field of communication, and is used for realizing a pressure sensing module, a terminal, an image display method and a device for reducing the structure and installation complexity of the pressure sensing module and enhancing the use effect of the pressure sensing module.

Claims

A pressure sensing module includes two or more pressure sensing resistors, and the pressure sensing resistor has a characteristic that a resistance value changes with a change in pressure.
The pressure sensing module according to claim 1, wherein the two or more pressure sensing resistors are arranged in M rows and N columns, and the R pressure sensing resistors in the M rows and N columns of pressure sensing resistors form a a differential bridge, wherein the differential bridge is used to determine a resistance change value of the two or more pressure sensing resistors, wherein the M, N, and R are positive integers, and the M*N/R is also satisfied. A positive integer.
The pressure sensing module according to claim 2, wherein said M = 8, N = 4, and R = 8.
The pressure sensing module according to any one of claims 1 to 3, wherein the pressure sensing resistor is a pressure sensing ink, and the pressure sensing ink has at least one of the following features:

The printing area of the pressure-sensitive ink ranges from 2 to 5 mm 2 ;

The shape of the pressure-sensitive ink is a symmetrical shape, including: square, circular or triangular;

The arrangement of the two pressure-sensitive inks in the longitudinal direction ranges from 10 mm to 20 mm;

The two pressure-sensitive inks are arranged in the width direction in the range of 15 mm to 25 mm.
The pressure sensing module according to claim 4, wherein when the shape of the pressure sensing ink is square, the pressure sensing ink is a rectangle of 1 mm * 3 mm, and / or the thickness range of the pressure sensing ink It is 5 nm to 15 nm.
A terminal comprising a touch panel, a display module, and the pressure sensing module according to any one of claims 1 to 5, wherein the touch panel is configured to determine a touch position of the touch terminal, the pressure The sensing module is configured to determine a touch force of the touch terminal, and the display module is configured to display an image according to the touch position and the touch velocity.
An image display method comprising:

Obtaining a touch position of the terminal from the touch panel on the terminal, and acquiring a touch force of the touch terminal from the pressure sensing module of the terminal, wherein the pressure sensing module is composed of two or more pressure sensors a resistor composition, the pressure sensing resistor having a characteristic that a resistance value changes with a change in pressure;

An image is displayed according to the touch position and the touch velocity.
The method according to claim 7, wherein the obtaining the touch force of the terminal from the pressure sensing module of the terminal comprises:

Determining a resistance change value of the two or more pressure sensing resistors;

The touch force is determined according to the resistance change value.
The method according to claim 8, wherein the two or more pressure sensing resistors are arranged in M rows and N columns, and the R pressure sensing resistors of the M rows and N columns of pressure sensing resistors form a differential bridge. The M, N, and R are all positive integers, and M*N/R is also a positive integer. The resistance change values of the two or more pressure sensing resistors are determined to include:

Determining a voltage change value of the differential bridge;

The resistance change value is determined according to the voltage change value.
An image display device comprising:

An acquiring module, configured to acquire, by using a touch panel on the terminal, a touch location of the touched terminal, and obtain a touch force of the touched terminal from a pressure sensing module of the terminal, where the pressure sensing module is configured by Two or more pressure sensing resistors, wherein the pressure sensing resistor has a characteristic that a resistance value changes with a change in pressure;

And a display module, configured to display an image according to the touch location and the touch velocity.
The device according to claim 10, wherein when the touch force of the terminal is touched from the pressure sensing module of the terminal, the acquiring module comprises:

a first determining unit, configured to determine a resistance change value of the two or more pressure sensing resistors;

a second determining unit, configured to determine the touch force according to the resistance change value.
The device according to claim 11, wherein the two or more pressure sensing resistors are arranged in M rows and N columns, and the R pressure sensing resistors in the M rows and N columns of pressure sensing resistors form a differential electric current. In the bridge, the M, N, and R are all positive integers, and the M*N/R is also a positive integer. The first determining unit includes:

a first determining subunit, configured to determine a voltage change value of the differential bridge;

a second determining subunit, configured to determine the resistance change value according to the voltage change value.