CN112019661A - Mobile terminal - Google Patents

Abstract

The application provides a mobile terminal which comprises a frame and a display screen arranged on the frame. The display screen is provided with a first surface and a second surface opposite to the first surface, the first surface is a display surface, and the second surface faces the frame. The mobile terminal also comprises a capacitance sensor for detecting the pressure applied to the pressing area and a capacitance detection circuit for detecting the capacitance of the capacitance sensor. The capacitive sensor comprises a first pole piece arranged on the second surface and opposite to the pressing area and a second pole piece arranged on the frame. The pressing area is an area corresponding to the first pole piece in the display screen, and the first pole piece can deform when the area is pressed. When the user presses the pressing area, the first pole piece deforms, so that the capacitance of the capacitance sensor changes, and the capacitance detection circuit identifies whether the pressing area is pressed or not by detecting the capacitance change of the capacitance sensor. The pressing area and the capacitance sensor can be arranged without opening a hole on the display screen, so that the display screen is of a complete structure.

Description

Mobile terminal

Technical Field

The application relates to the technical field of mobile terminals, in particular to a mobile terminal.

Background

The trend in smart phones is to seek higher screen occupation ratios and more compact appearances. The side frame of present cell-phone has generally all set up power key, volume key, need trompil and installation entity button on the frame to not accord with the requirement that higher screen accounts for and more succinct outward appearance, consequently, the side screen of borduring of side obtains gradual application. However, when a side screen with a side edge is adopted, a mode of forming a hole in the frame and installing the solid key cannot be adopted.

Disclosure of Invention

The application provides a mobile terminal, so that keys can be conveniently arranged on the mobile terminal.

The application provides a mobile terminal which comprises a frame and a display screen arranged on the frame. The display screen is provided with a first surface and a second surface opposite to the first surface, wherein the first surface is a display surface, and the second surface faces the frame. The mobile terminal also comprises a capacitance sensor for detecting the pressure applied to the pressing area. The capacitive sensor includes a first pole piece disposed on the second face and opposite the pressing zone, and a second pole piece disposed on the frame. The pressing area is an area corresponding to the first pole piece in the display screen, and the area can enable the first pole piece to deform when being pressed. When a user of the mobile terminal presses the pressing area on the display screen, the pressing area deforms, so that the first pole piece approaches to the second pole piece, and the capacitance of the capacitive sensor changes. The mobile terminal further comprises a capacitance detection circuit for detecting capacitance of the capacitance sensor to detect a variation of the capacitance sensor, thereby identifying whether the pressed region of the display screen is pressed. Therefore, the pressing area and the capacitance sensor can be arranged without opening holes on the display screen, and the display screen is of a complete structure without opening holes. In addition, the piezoresistive or piezoelectric keys in the prior art have prestress between the keys and the display screen, thereby affecting the display screen. And pre-stress is not needed between the two pole pieces, so that the display screen is free of pre-stress, and the influence of the pre-stress on the display screen is reduced.

In a specific embodiment, a main board is disposed on the frame, and the capacitance detection circuit is disposed on the main board. The mainboard is also provided with an application processor which is connected with the capacitance detection circuit and is used for controlling the capacitance detection circuit so as to identify and judge the capacitance variation of the capacitance sensor detected by the capacitance detection circuit, thereby carrying out corresponding feedback.

In a specific embodiment, a vibration motor is further disposed on the frame, and the application processor is further configured to control the vibration motor to vibrate when the capacitance of the capacitance sensor is determined to be greater than or equal to the set threshold. Therefore, when a user of the mobile terminal presses the pressing area, the vibration motor is controlled to vibrate through the application processor, and the pressing action of the user is fed back.

In a specific implementation mode, the frame comprises a bottom frame and two side frames fixedly connected with the bottom frame respectively, the display screen is an arc-shaped screen, and the arc-shaped screen wraps the two side frames so as to enlarge the display area of the display screen.

In a specific embodiment, the arc-shaped screen is provided with a bending part wrapping each side frame, and the pressing area is arranged on one bending part of the two bending parts. The second pole piece is arranged on the side frame, and the first pole piece is at least partially positioned on the bending part so as to be convenient for arranging the capacitance sensor.

In a specific embodiment, the display screen comprises a screen module arranged on the frame and a cover plate attached to the screen module. The pressing area is positioned on the cover plate, and the cover plate is provided with a mark for identifying the pressing area so as to quickly identify the specific position of the pressing area.

In one embodiment, the first pole piece is connected to the capacitance detection circuit and the second pole piece is connected to ground. Or the first pole piece is grounded, and the second pole piece is connected with the capacitance detection circuit. One of the two pole pieces forms a stable zero electromotive force through grounding, so that the capacitance value between the two pole pieces can be accurately measured.

In a specific embodiment, the number of the capacitive sensors is at least one, the number of the pressing areas is at least one, and the at least one pressing area is in one-to-one correspondence with the at least one capacitive sensor. When the number of the capacitive sensors is at least two, the first pole pieces in the at least two capacitive sensors are of an integrated structure. The second pole pieces in the at least two capacitive sensors are mutually insulated and are respectively connected with the capacitance detection circuit, and the first pole pieces are grounded. Facilitating the provision of a plurality of capacitive sensors.

In a specific embodiment, the first pole piece is a metal sheet covering the second surface and used for shielding the display screen, so that the metal sheet does not need to be separately arranged on the second surface of the display screen to serve as the first pole piece.

In a specific embodiment, the distance between the first pole piece and the second pole piece is 0.1mm-0.7 mm. When the distance between the first pole piece and the second pole piece is specifically set, the distance between the first pole piece and the second pole piece is 0.1-0.3mm, and the sensitivity of capacitance change between the first pole piece and the second pole piece is improved.

In one embodiment, a high dielectric constant insulating material is filled between the first pole piece and the second pole piece to prevent the first pole piece and the second pole piece from being damaged due to breakdown. The high-dielectric-constant insulating material can be an elastic material, for example, silica gel or foam can be selected, so that the influence on the deformation of the first pole piece is reduced.

In addition, the application also provides another mobile terminal which comprises a display screen, a frame for fixing the display screen, a capacitance sensor for detecting the pressure applied to the pressing area, and a capacitance detection circuit for detecting the capacitance of the capacitance sensor. The frame is made of non-metal materials and provided with a frame wrapping the edge of the display screen. The capacitive sensor comprises a first pole piece arranged on the frame and facing the inside of the mobile terminal, and a second pole piece arranged on the frame. The pressing area is an area corresponding to the first pole piece in the frame, and the area can enable the first pole piece to deform when being pressed. By adopting the nonmetallic frame and the capacitive sensor arranged on the frame, the frame does not need to be grooved or perforated, so that the frame is a complete structure without grooves or holes.

In a specific embodiment, a main board is disposed on the frame, and the capacitance detection circuit is disposed on the main board. The mainboard is also provided with an application processor which is connected with the capacitance detection circuit and is used for controlling the capacitance detection circuit so as to identify and judge the capacitance variation of the capacitance sensor detected by the capacitance detection circuit, thereby carrying out corresponding feedback.

In a specific embodiment, the frame includes a bottom frame, and a side frame fixedly connected to the bottom frame, wherein the side frame is opposite to and spaced apart from the side frame, and the second pole piece is disposed on the side frame toward one side of the side frame.

In a specific embodiment, the frame is provided with a mark for identifying the pressing area.

In one embodiment, the first pole piece is connected to the capacitance detection circuit and the second pole piece is connected to ground. Or the first pole piece is grounded, and the second pole piece is connected with the capacitance detection circuit. One of the two pole pieces forms a stable zero electromotive force through grounding, so that the capacitance value between the two pole pieces can be accurately measured.

In a specific embodiment, the number of the capacitive sensors is at least one, the number of the pressing areas is at least one, and the at least one pressing area is in one-to-one correspondence with the at least one capacitive sensor. When the number of the capacitive sensors is at least two, the first pole pieces in the at least two capacitive sensors are of an integral structure which is grounded, and the second pole pieces in the at least two capacitive sensors are mutually insulated and are respectively connected with the capacitance detection circuit. Or the second pole pieces in the at least two capacitive sensors are of an integral structure which is grounded, and the first pole pieces in the at least two capacitive sensors are mutually insulated and are respectively connected with the capacitance detection circuit. Facilitating the provision of a plurality of capacitive sensors.

Drawings

Fig. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention;

fig. 2 is a block diagram of a mobile terminal according to an embodiment of the present invention;

FIG. 3 is a flowchart illustrating an application processor process according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a capacitance variation waveform of a capacitive sensor according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another mobile terminal according to an embodiment of the present invention.

Reference numerals:

10-frame 11-bottom frame 12-side frame 13-main board

14-frame 20-display screen 21-first side 22-second side

23-bending part 24-plane area 31-pressing area

32-capacitive sensor 321-first pole piece 322-second pole piece

33-capacitance detection circuit 40-application processor 50-vibration motor

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

For the convenience of understanding the mobile terminal provided in the embodiment of the present invention, an application scenario thereof will be described first. The mobile terminal can be a mobile phone, a notebook computer, a tablet computer and other terminal equipment with a display screen. The following describes a mobile terminal according to an embodiment of the present invention in detail with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of the present invention provides a mobile terminal including a frame 10, and a display 20 disposed on the frame 10. The frame 10 may be a middle frame structure in a smart phone or a tablet computer, or may be another supporting structure for supporting the display screen 20. As shown in fig. 1, the frame 10 includes a bottom frame 11 and two side frames 12 fixedly connected to the bottom frame 11 by welding, clamping, etc., wherein the bottom frame 11 and the side frames 12 may be integrated to facilitate manufacturing. It should be understood that the above description shows only one form of the frame 10, and that other structures capable of supporting the display screen 20 may be used.

The Display screen 20 is a Display screen conventionally used for Display in the prior art, and may be an LCD (Liquid Crystal Display) Display screen, an OLED (Organic Light-Emitting Diode) Display screen, or the like. As shown in fig. 1, the display panel 20 is an arc-shaped panel having a bent portion 23 (a portion of the display panel 20 shown in fig. 1 opposite to the side frame 12) wrapping each side frame 12, and a flat area 24 (a portion of the display panel 20 shown in fig. 1 opposite to the bottom frame 11) connecting the two bent portions 23. The display area of the display screen 20 can be enlarged by extending a bending portion 23 on each of two opposite sides of the flat area 24. It should be understood that the above only illustrates one manner of display 20, and that other arrangements may be used. For example, the display screen 20 may be a flat screen (not including the bending portion 23) as is conventional in the art. When setting up display screen 20, display screen 20 includes fixes the screen module on frame 10 through modes such as screw fastening, joint to and the apron of laminating on the screen module. The screen module is a conventional screen module in the prior art, and the cover plate is a glass cover plate, a transparent plastic cover plate and the like which are covered on the outer side of the screen module (the direction towards the outer side of the mobile terminal on the screen module) in the prior art. Referring to fig. 1, the display 20 has a first face 21 and a second face 22 opposite to the first face 21, wherein the first face 21 is a display face on the display 20 facing a user of the mobile terminal, and the second face 22 is a face of the display 20 facing the frame 10 inside the mobile terminal. That is, the first surface 21 is a surface of the cover plate facing away from the frame 10, and the second surface 22 is a surface of the screen module facing toward the frame 10. In addition, a metal sheet for shielding the display 20, which may be a copper foil, an aluminum foil, or the like, may be bonded to the second surface 22 of the display 20 to prevent the display 20 from interfering with other devices inside the mobile terminal.

With continued reference to fig. 1, the mobile terminal according to the embodiment of the present invention further includes a pressing area 31 disposed in the display screen 20, a capacitance sensor 32 for detecting a pressure applied to the pressing area 31, and a capacitance detection circuit 33 for detecting a capacitance of the capacitance sensor 32. The capacitive sensor 32 includes a first pole piece 321 disposed on the second surface 22 of the display screen 20, and a second pole piece 322 disposed on the frame 10, wherein the pressing area 31 is an area of the display screen 20 corresponding to the first pole piece 321, and the first pole piece 321 deforms when the area is pressed. In a specific application, when a user of the mobile terminal presses the pressing area 31, the first pole piece 321 in the capacitive sensor 32 deforms, so that the capacitance of the capacitive sensor 32 can change according to the change of the pressure applied to the pressing area 31, and the capacitance detection circuit 33 identifies whether the user of the mobile terminal presses the pressing area 31 by detecting the change of the capacitance of the capacitive sensor 32, so that the user of the mobile terminal controls the power supply, the volume, the brightness and the like of the mobile terminal by pressing the pressing area 31 on the display screen 20.

When the pressing region 31 is provided, referring to fig. 1, the pressing region 31 is provided in one of the bent portions 23 of the two bent portions 23. As shown in fig. 1, the pressing region 31 is opposite to the first pole piece 321 in the capacitive sensor 32, so that when a user of the mobile terminal presses the pressing region 31, the first pole piece 321 deforms. The area of the pressing region 31 may be larger than the area of the first pole piece 321, or may be smaller than the area of the first pole piece 321. Specifically, the height of the pressing region 31 (the length of the pressing region 31 in the vertical direction shown in fig. 1) may be set to be greater than the height of the first pole piece 321 (the length of the first pole piece 321 in the vertical direction shown in fig. 1), the height of the pressing region 31 may be set to be equal to the height of the first pole piece 321, and the height of the pressing region 31 may be set to be smaller than the height of the first pole piece 321. That is, any arrangement that can deform the first pole piece 321 when the pressing region 31 is pressed is within the scope of the embodiments of the present invention. It should be understood that the location of the pressing area 31 is not limited to the arrangement of the bending portion 23 of the display screen 20 shown in fig. 1, and the pressing area 31 may also be arranged on the flat area 24 of the display screen 20.

In order to facilitate the user of the mobile terminal to recognize the specific location of the pressing region 31, a mark for identifying the pressing region 31 may be provided on the cover plate. When the mark is set, the mark can be marked on the cover plate, and an icon for marking the pressing area 31 can be set at the position of the pressing area 31 of the display screen 20 by adopting a programming mode. It should be understood that the manner of implementing the identification of the press region 31 is not limited to the above-described arrangement, and other arrangements capable of identifying the press region 31 may be employed.

When the capacitive sensors 32 are arranged, the number of the capacitive sensors 32 may be one, or two or more, and the number of the capacitive sensors 32 is specifically determined according to the needs of the mobile terminal. First, a description will be given of an example in which one capacitive sensor 32 is provided.

When the capacitive sensor 32 is provided, as shown in fig. 1, the capacitive sensor 32 includes two pole pieces, which are a first pole piece 321 disposed on the second surface 22 of the display screen 20 and opposite to the pressing area 31, and a second pole piece 322 disposed on the frame 10. When the first pole piece 321 and the second pole piece 322 are disposed, the first pole piece 321 may be a metal sheet adhered to the side frame 12 of the screen module, and the second pole piece 322 is a metal sheet fixed to the side frame 12 by adhesion, clamping, or the like, and having a partial area opposite to the first pole piece 321. The first and second pole pieces 321, 322 may be made of copper foil, aluminum foil, or other metal sheet. The materials of the first pole piece 321 and the second pole piece 322 may be the same, i.e. both may be copper foil or aluminum foil; the materials of the first and second pole pieces 321 and 322 may also be different, that is, the first pole piece 321 may be a copper foil, an aluminum foil, or the like, and the second pole piece 322 is made of another metal material different from the material of the first pole piece 321, for example, the first pole piece 321 is a copper foil, and the second pole piece 322 is an aluminum foil.

In addition, the first pole piece 321 can be a metal sheet adhered to the second surface 22 of the screen module and used for shielding the display screen 20, and the first pole piece 321 matched with the second pole piece 322 does not need to be separately arranged on the screen module, so that the arrangement space of the first pole piece 321 can be reduced. At this time, the first pole piece 321 is grounded to form a stable zero electromotive force, and the second pole piece 322 is connected to the capacitance detection circuit 33, so as to facilitate the detection of the capacitance values of the two pole pieces. The second pole piece 322 is disposed on the side frame 12 and is connected to the side frame 12 in an insulated manner. When the second pole piece 322 is arranged, the second pole piece 322 may be a boss on the side frame 12, and the boss and the side frame 12 are in insulation connection through insulation materials such as plastics and rubber; the second pole piece 322 may also be first disposed on an insulating plastic block, and then the plastic block is clamped to the side frame 12 in a clamping manner. When the user of the mobile terminal presses the pressing area 31 of the display 20, the pressing area 31 deforms, so that the first pole piece 321 deforms and approaches the second pole piece 322, thereby increasing the capacitance of the capacitive sensor 32. When the user of the mobile terminal releases the pressing of the pressing area 31, the display screen 20 is not deformed because the pressing area 31 is not pressed, so that the distance between the first pole piece 321 and the second pole piece 322 is enlarged, and the capacitance of the capacitive sensor 32 is reduced. The capacitance detection circuit 33 detects a change in capacitance between the two pole pieces, thereby identifying whether the pressed region 31 is pressed.

It should be understood that the arrangement of the first pole piece 321 and the second pole piece 322 is not limited to the above-described one, and other arrangements may be adopted. For example, a grounded metal sheet may be separately bonded to the second surface 22 of the screen module at a position opposite to the pressing area 31 as the first pole piece 321, and the arrangement manner of the second pole piece 322 refers to the arrangement manner of the second pole piece 322 described above, and is not described herein again. The second pole piece 322 may be grounded, and the first pole piece 321 may be connected to the capacitance detection circuit 33. When the touch screen module is set up, the first pole piece 321 is a metal piece which is separately adhered to the second surface 22 of the touch screen module and is opposite to the position of the pressing area 31, the first pole piece 321 is in insulated connection with the touch screen module, and the first pole piece 321 is electrically connected with the capacitance detection circuit 33. The second pole piece 322 is a metal piece adhered on the frame 10 and electrically connected to the frame 10, and the second pole piece 322 is opposite to the first pole piece 321 at least in a partial region.

It should be noted that the two pole pieces constituting the capacitive sensor 32 are not limited to the above-described arrangement in which one of the two pole pieces is grounded, and other arrangements in which the capacitance between the two pole pieces can be changed when the pressing region 31 is pressed by a user may be employed. For example, the first pole piece 321 and the second pole piece 322 may be not grounded. When the screen module is set, a metal sheet is adhered to the second surface 22 of the screen module at a position opposite to the pressing area 31 to serve as the first pole piece 321, and the first pole piece 321 is connected with the screen module in an insulating manner. A metal sheet is adhered to the frame 10 at a position opposite to the first pole piece 321 to form a second pole piece 322, and the second pole piece 322 is connected to the frame 10 in an insulated manner. The first pole piece 321 and the second pole piece 322 are both connected to the capacitance detection circuit 33 to detect the capacitance between the two pole pieces.

When the distance between the first pole piece 321 and the second pole piece 322 is determined, the distance between the first pole piece 321 and the second pole piece 322 (the vertical distance between the two pole pieces) is 0.1mm to 0.7 mm. Specifically, the distance between the first pole piece 321 and the second pole piece 322 may be any value between 0.1mm and 0.7mm, such as 0.1mm, 0.15mm, 0.20mm, 0.25mm, 0.30mm, 0.35mm, 0.40mm, 0.45mm, 0.50mm, 0.55mm, 0.60mm, 0.65mm, and 0.70 mm. In order to improve the sensitivity of the first pole piece 321 and the second pole piece 322, the distance between the first pole piece 321 and the second pole piece 322 may be set to be 0.1-0.3 mm. Specifically, the distance between the first pole piece 321 and the second pole piece 322 may be any value between 0.1 and 0.3mm, such as 0.10mm, 0.13mm, 0.15mm, 0.18mm, 0.20mm, 0.23mm, 0.25mm, 0.27mm, 0.30mm, so as to improve the sensitivity of capacitance change between the first pole piece 321 and the second pole piece 322.

In addition, the first pole piece 321 and the second pole piece 322 can realize the insulation between the first pole piece 321 and the second pole piece 322 through air space; a high dielectric constant insulating material may be filled between the first pole piece 321 and the second pole piece 322 to prevent the first pole piece 321 and the second pole piece 322 from being damaged due to breakdown. When the high-k material is selected, an elastic material may be selected and used, for example, a material having elasticity and insulation, such as silicon gel or foam, may be selected, so as to reduce the influence of the material filled between the first pole piece 321 and the second pole piece 322 on the deformation of the first pole piece 321.

Referring to fig. 1, a main board 13 is disposed on a frame 10 by means of screw fastening, welding, or the like, and a capacitance detection circuit 33 is disposed on the main board 13. The main board 13 is a printed circuit board applied to a mobile terminal in the prior art. The capacitance detection circuit 33 is a conventional capacitance detection circuit in the prior art that is capable of detecting the capacitance between two pole pieces. The capacitance detection circuit 33 may be printed on the printed circuit board in a printed manner.

It should be noted that the above only shows the way of disposing the capacitive sensor 32 between the bending portion 23 of the display screen 20 and the frame 10, and besides, the capacitive sensor 32 may be disposed at other positions. For example, the first pole piece 321 of the capacitive sensor 32 is disposed on the second surface 22 of the planar area 24, the second pole piece 322 is disposed on the bottom frame 11 at a position opposite to the first pole piece 321, and the pressing area 31 is an area corresponding to the first pole piece 321 in the planar area 24 of the display screen 20. That is, as long as the first pole piece 321 of the capacitive sensor 32 is disposed on the second surface 22 of the display screen 20, the second pole piece 322 of the capacitive sensor 32 is disposed on the frame 10, and the pressing area 31 is an area of the display screen 20 corresponding to the first pole piece 321, and the first pole piece 321 can be deformed when the pressing area 31 is pressed, all of which are within the protection scope of the embodiment of the present invention.

Next, an arrangement in which the number of the capacitive sensors 32 is at least two, three, or the like will be described. Two or more capacitive sensors 32 may be distributed on the same side of the mobile terminal, i.e. two or more capacitive sensors 32 are disposed between the same bend 23 and the frame 10. Two or more capacitive sensors 32 may also be respectively disposed on different sides of the mobile terminal, that is, a part of the capacitive sensors 32 is disposed between one of the two bending portions 23 and the frame 10, and another part of the capacitive sensors 32 is disposed between the other bending portion 23 and the frame 10. Two or more capacitive sensors 32 may also be arranged partly on one side of the mobile terminal and partly on the planar area 24 of the mobile terminal, i.e. one part of the capacitive sensor 32 is arranged between the bend 23 and the frame 10 and another part of the capacitive sensor 32 is arranged between the planar area 24 and the frame 10.

When the capacitive sensor 32 is disposed, the first pole pieces 321 in the two or more capacitive sensors 32 may be an integral structure, and the first pole pieces 321 are grounded, so as to facilitate the disposition of the first pole pieces 321. At this time, a metal sheet adhered to the second surface 22 of the display screen 20 and used for shielding the display screen 20 may be selected as the first pole piece 321. While the second pole pieces 322 in the different capacitive sensors 32 are relatively insulated and each second pole piece 322 is insulated from the frame 10. And the second pole piece 322 of each capacitive sensor 32 is connected to the capacitance detection circuit 33 to detect the capacitance value of the capacitive sensor 32 of each key assembly 30. Through the above arrangement, the first pole piece 321 does not need to be separately arranged on the second surface 22 of the display screen 20, and the arrangement and the manufacture are simplified. It should be understood that the above only shows one arrangement when there are two or more capacitive sensors 32, and that other arrangements may be used. For example, the first pole pieces 321 in different capacitive sensors 32 are insulated from each other, and the second pole pieces 322 in different capacitive sensors 32 are insulated from each other, so that the different capacitive sensors 32 are independent structures. When the pressing regions 31 are arranged, the pressing regions 31 correspond to the capacitance sensors 32 one by one, that is, the number of the pressing regions 31 is equal to the number of the capacitance sensors 32, and each pressing region 31 is opposite to the first pole piece 321 in the corresponding capacitance sensor 32, so that the first pole piece 321 of the corresponding capacitance sensor 32 can deform when each pressing region 31 is pressed.

Referring to fig. 1, the main board 13 is further provided with an application processor 40 connected to the capacitance detection circuit 33 and configured to control the capacitance detection circuit 33, so as to identify and determine a capacitance variation of the capacitance sensor 32 detected by the capacitance detection circuit 33, thereby implementing control of a control function preset in each pressing area 31. Wherein the application processor 40 is a processor conventional in the art for controlling a mobile terminal. In a specific application, when the preset control function of the pressing area 31 is to control the volume of the mobile terminal, and when the user of the mobile terminal presses the pressing area 31, the application processor 40 may adjust the volume of the mobile terminal according to the signal transmitted by the capacitance detection circuit 33, so as to adjust the preset control function corresponding to the key assembly 30. It should be understood that the control function preset in the pressing area 31 is not limited to the volume adjustment function shown above, but may be adjusting the progress of media playing, modifying screen brightness, performing other functions related to a specific application program, and the like. When the application processor 40 detects that the capacitance value of the capacitance sensor 32 detected by the capacitance detection circuit 33 is greater than or equal to the set threshold value, the application processor 40 recognizes that the pressing area 31 is pressed, so that the application processor 40 responds to the functional module corresponding to the pressing area 31 to control the functional module corresponding to the pressing area 31 on the mobile terminal to operate. When the application processor 40 detects that the capacitance value of the capacitance sensor 32 detected by the capacitance detection circuit 33 is smaller than the set threshold value, the application processor 40 determines that the pressing area 31 is not pressed, and does not perform the operation of the predetermined control function.

In addition, referring to fig. 4, since the original waveform L1 output by the capacitance detection circuit 33 includes a signal pulse generated when a user of the mobile terminal presses the pressing area 31 and a baseline slowly drifts due to interference factors such as temperature, an error may be generated. When the application processor 40 is specifically configured, the application processor 40 includes three functional modules, which are an original signal acquisition module, a baseline tracking module, and a data processing and final judgment module, respectively. Referring to fig. 3, when the application processor is working, step 001: the original signal acquisition module adopts the capacitance signal detected by the capacitance detection circuit 33 and transmits the capacitance signal to the baseline tracking module. The original signal acquisition module is a functional module which is used for collecting signals and is conventional in a control circuit in the prior art. Step 002: when the original signal acquisition module acquires a capacitance signal detected by the capacitance detection circuit 33, the baseline tracking module processes the original waveform L1, the baseline tracking module determines the offset of the original waveform L1 relative to the ground level, the offset is deducted to obtain an ideal signal waveform L2, and the ideal signal waveform L2 is transmitted to the data processing and final judgment module. Step 003: the data processing and final judging module judges whether the capacitance of the capacitance sensor 32 is greater than or equal to a set threshold value according to the waveform L2 processed by the baseline tracking module, so as to judge whether the pressing action exists. The signals transmitted to the application processor 40 by the capacitance detection circuit 33 are processed by the three functional modules, so as to filter out interference signals, and the application processor 40 can accurately identify and judge whether the user of the mobile terminal presses the pressing area 31.

Referring to fig. 1 and 2, a vibration motor 50 is provided on the frame 10 by means of screw fastening, bonding, or the like, and the vibration motor 50 is connected to the application processor 40 so that the application processor can control the vibration motor 50 to vibrate or stop vibrating. Here, the vibration motor 50 is a motor for vibration in the related art, and the vibration motor 50 may be a lateral linear vibration motor, a longitudinal linear vibration motor, or the like. When the user of the mobile terminal presses the pressing area 31 on the display screen 20, the capacitance detection circuit 33 provided on the main board 13 can detect the amount of change in the capacitance of the capacitance sensor 32, and the capacitance detection circuit 33 transfers the information to the application processor 40. When the application processor 40 determines that the capacitance of the capacitance sensor 32 is greater than or equal to the set threshold, the application processor 40 controls the vibration motor 50 to vibrate and feeds back the pressing action of the user, so that the user of the mobile terminal can determine whether the pressing force of the pressing area 31 is too small according to whether the vibration motor 50 vibrates.

By providing the pressing area 31 in the display screen 20, a capacitive sensor 32 for detecting a pressure applied to the pressing area 31 is provided on the display screen 20 and the frame 10. The capacitive sensor 32 comprises a first pole piece 321 arranged on the second face 22 and opposite to the pressing zone 31, and a second pole piece 322 arranged on the frame 10. When a user of the mobile terminal presses the pressing area 31 on the display screen 20, the pressing area 31 is deformed to move the first pole piece 321 toward the second pole piece 322, so that the capacitance of the capacitive sensor 32 is changed. The capacitance detection circuit 33 for detecting the capacitance of the capacitance sensor 32 is provided so as to detect the amount of change in the capacitance of the capacitance sensor 32, thereby recognizing whether the pressing area 31 of the display screen 20 is pressed. And the pressing area 31 and the capacitive sensor 32 can be installed without opening holes on the display screen 20, so that the display screen 20 is a complete structure without opening holes. In addition, the piezoresistive or piezoelectric keys of the prior art have a pre-stress between the key and the display 20, thereby affecting the display 20. The two pole pieces shown in the embodiment of the invention do not need pre-stress, so that the display screen 20 is not pre-stressed, and the influence of the pre-stress on the display screen 20 is reduced.

In addition, another mobile terminal is provided in an embodiment of the present invention, and referring to fig. 5, the mobile terminal includes a display 20 and a frame 10 for fixing the display 20. The display screen 20 is a conventional display screen in the prior art, and the foregoing description is specifically referred to, and is not repeated herein. When the frame 10 is disposed, as shown in fig. 5, the frame 10 has a frame 14 wrapping the edge of the display screen 20, and specifically, the frame 14 may be fixedly connected to the edge of the display screen 20 by an adhesive manner, so as to fix the display screen 20. And the frame 10 is made of non-metal materials such as plastic and rubber. In order to fix the frame 14, the frame 10 further includes a bottom frame 11 fixedly connected to the frame 14 by welding, fastening with screws, integral molding, or the like, wherein the bottom frame 11 is opposite to the display screen 20. It should be understood that the above only illustrates one way of securing the display 20, and that other arrangements may be used.

With continued reference to fig. 5, the mobile terminal further includes a pressing area 31 disposed in the frame 14, a capacitance sensor 32 for detecting a pressure applied to the pressing area 31, and a capacitance detection circuit 33 for detecting a capacitance of the capacitance sensor 32. As shown in fig. 5, the capacitive sensor 32 includes a first pole piece 321 disposed on the frame 14 and facing into the mobile terminal, and a second pole piece 322 disposed on the frame 10, wherein the pressing region 31 is a region corresponding to the first pole piece 321 in the frame 14, and the region can deform the first pole piece 321 when being pressed. In a specific application, when a user of the mobile terminal presses the pressing area 31, the first pole piece 321 in the capacitive sensor 32 deforms, so that the capacitance of the capacitive sensor 32 can change according to the change of the pressure applied to the pressing area 31, and the capacitance detection circuit 33 identifies whether the user of the mobile terminal presses the pressing area 31 by detecting the change of the capacitance of the capacitive sensor 32, so that the user of the mobile terminal controls the power supply, the volume, the brightness and the like of the mobile terminal by pressing the pressing area 31 on the display screen 20.

When the pressing regions 31 and the capacitance sensors 32 are provided, the number of the pressing regions 31 is at least one, the number of the capacitance sensors 32 is at least one, and the at least one pressing region 31 and the at least one capacitance sensor 32 are in one-to-one correspondence. That is, the number of the pressing areas 31 is equal to the number of the capacitive sensors 32, and when each pressing area 31 is pressed, the first pole piece 321 in the capacitive sensor 32 corresponding to the pressing area 31 can be deformed, so that the capacitance of the capacitive sensor 32 corresponding to the pressing area 31 is changed. First, a pressing area 31 and a capacitance sensor 32 will be described.

Referring to fig. 5, when the pressing region 31 is provided, the pressing region 31 is provided in substantially the same manner as the pressing region 31 in the aforementioned mobile terminal, except that the pressing region 31 is provided in the bezel 14. In order to facilitate the identification of the specific location of the pressing area 31, a mark for identifying the pressing area 31 is provided on the frame 14. In a specific setting, the pressing area 31 may be marked on the frame 14 by a scribing method, and a specific position of the pressing area 31 may be marked by a boss or a groove on the frame 14.

With continued reference to fig. 5, the first pole piece 321 and the second pole piece 322 of the capacitive sensor 32 are disposed substantially the same way when the capacitive sensor 32 is disposed, except that the first pole piece 321 of the capacitive sensor 32 is disposed on the bezel 14 facing into the mobile terminal. Referring to fig. 5, the first pole piece 321 may be fixed on the frame 14 by means of bonding, welding, screw fastening, etc. to a position facing into the mobile terminal. To facilitate the installation of the second pole piece 322, as shown in fig. 5, the frame 10 further has a side frame 12 fixedly connected to the bottom frame 11 by means of bonding, welding, screwing, integral molding, etc., and the side frame 12 is spaced apart from and opposite to the side frame 14. The second pole piece 322 is fixed to the side frame 12 on the side facing the side frame 14 by means of bonding, welding, screw fastening, or the like. When the pressing area 31 is pressed, the first pole piece 321 is deformed, and the first pole piece 321 moves toward the second pole piece 322, so that the capacitance of the capacitive sensor 32 changes. It should be understood that the second pole piece 322 can be arranged in other ways besides the above-mentioned way. For example, the second pole piece 322 may be fixed to the bottom frame 11 by means of adhesion, screw fastening, or the like.

When the capacitance detection circuit 33 is disposed, the disposing manner of the capacitance detection circuit 33 is substantially the same as the foregoing disposing manner, and is not described herein again.

In addition, in order to facilitate the capacitance detection circuit 33 to accurately measure the capacitance change between the first pole piece 321 and the second pole piece 322, one of the first pole piece 321 and the second pole piece 322 may be grounded, that is, one of the pole pieces forms a stable zero electromotive force by being grounded. Specifically, the first pole piece 321 may be grounded, and the second pole piece 322 is connected to the capacitance detection circuit 33; the second pole piece 322 may be grounded and the first pole piece 321 may be connected to the capacitance detection circuit 33. For a specific setting manner, reference is made to the foregoing description, and details are not repeated here.

Next, a case where the number of the pressing areas 31 and the capacitance sensors 32 is at least two, three, four, and the like will be described. In this case, the pressing regions 31 and the capacitive sensors 32 are arranged in the same manner as the above-mentioned arrangement, except that each pressing region 31 is arranged in the frame 14, and the first pole piece 321 in each capacitive sensor 32 is arranged on the side of the frame 14 facing the inside of the mobile terminal. When arranged, at least two pressing areas 31 can be arranged on the frame 14 on the same side of the mobile terminal; it is also possible to arrange a part of the at least two pressing areas 31 on the frame 14 on one side of the mobile terminal and another part of the pressing areas 31 on the frame 14 on the other side of the mobile terminal. The first pole piece 321 of the capacitive sensor 32 is disposed on the frame 14 corresponding to the pressing area 31 toward one side in the mobile terminal. The first pole pieces 321 of the at least two capacitive sensors 32 may be arranged as an integral structure, the first pole pieces 321 are grounded, and the second pole pieces 322 of the at least two capacitive sensors 32 are insulated from each other and are respectively connected to the capacitive sensing circuit. In a specific configuration, a circle of metal sheet such as copper foil or aluminum foil may be bonded to the frame 14 toward the inside of the mobile terminal, so as to simplify the configuration. Or the second pole pieces 322 of the at least two capacitive sensors 32 are integrated, the second pole pieces 322 are grounded, and the first pole pieces 321 of the at least two capacitive sensors 32 are relatively insulated and are respectively connected to the capacitance detection circuit 33. For a specific setting manner, reference is made to the foregoing description, and details are not repeated here.

Referring to fig. 5, the mobile terminal further includes a main board 13 for disposing the capacitance detection circuit 33, and an application processor 40 disposed on the main board 13 and connected to the capacitance detection circuit 33, the application processor 40 being configured to control the capacitance detection circuit 33. In a specific arrangement, the main board 13 may be disposed on the frame 10. The manner in which the application processor 40 controls the capacitance detection circuit 33 specifically refers to the foregoing description, and is not described herein again.

Referring to fig. 5, the mobile terminal further includes a vibration motor 50 disposed on the frame 10, and the vibration motor 50 is disposed in the manner as described above and will not be described herein again.

By using the non-metallic frame 10 and the capacitive sensor 32 disposed on the frame 10, no slots or openings need to be formed in the bezel 14, so that the bezel 14 has a complete structure without slots or openings.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (18)

1. A mobile terminal, comprising:

a frame;

the display screen is arranged on the frame and provided with a first face and a second face opposite to the first face, wherein the first face is a display face, and the second face faces the frame; and

the capacitance sensor is used for detecting the pressure applied to the pressing area; the capacitive sensor includes a first pole piece disposed on the second face, and a second pole piece disposed on the frame; the pressing area is an area corresponding to the first pole piece in the display screen, and the area can enable the first pole piece to deform when being pressed;

and the capacitance detection circuit is used for detecting the capacitance of the capacitance sensor.

2. The mobile terminal of claim 1, further comprising a motherboard disposed on the frame, the capacitance detection circuit disposed on the motherboard; and the mainboard is also provided with an application processor which is connected with the capacitance detection circuit and is used for controlling the capacitance detection circuit.

3. The mobile terminal of claim 2, further comprising a vibration motor disposed on the frame, the application processor further configured to control the vibration motor to vibrate when the capacitance of the capacitive sensor is determined to be greater than or equal to a set threshold.

4. The mobile terminal according to any one of claims 1 to 3, wherein the frame comprises a bottom frame and two side frames fixedly connected to the bottom frame, respectively; the display screen is an arc screen; and the arc screen wraps the two side frames.

5. The mobile terminal of claim 4, wherein the arcuate screen has a bend that wraps around each side frame, the press area being disposed at one of the two bends;

the second pole piece is arranged on the side frame; the first pole piece is at least partially located at the bending part.

6. The mobile terminal according to any one of claims 1-5, wherein the display screen comprises a screen module disposed on the frame, and a cover plate attached to the screen module; the pressing area is located on the cover plate, and a mark for marking the pressing area is arranged on the cover plate.

7. The mobile terminal of any of claims 1-6, wherein the first pole piece is connected to the capacitance detection circuit and the second pole piece is connected to ground; or the like, or, alternatively,

the first pole piece is grounded, and the second pole piece is connected with the capacitance detection circuit.

8. The mobile terminal of any of claims 1-7, wherein the number of capacitive sensors is at least one, the number of press zones is at least one, and the at least one press zone is in one-to-one correspondence with the at least one capacitive sensor;

when the number of the capacitive sensors is at least two, a first pole piece in the at least two capacitive sensors is of an integral structure, and the first pole piece is grounded; and second pole pieces in the at least two capacitive sensors are mutually insulated and are respectively connected with the capacitance detection circuit.

9. The mobile terminal of claim 8, wherein the first pole piece is a metal sheet covering the second face and used for shielding the display screen.

10. The mobile terminal of any of claims 1-9, wherein a spacing between the first pole piece and the second pole piece is 0.1-0.7 mm.

11. The mobile terminal of any of claims 1-10, wherein a high dielectric constant insulating material is filled between the first pole piece and the second pole piece.

12. The mobile terminal of claim 11, wherein the high dielectric constant insulating material is an elastomeric material.

13. A mobile terminal, comprising:

a display screen;

the frame is fixed on the display screen, the frame is made of a non-metal material, and the frame is provided with a frame wrapping the edge of the display screen;

the capacitive sensor is used for detecting the pressure applied to the pressing area and comprises a first pole piece arranged on the frame and facing the inside of the mobile terminal and a second pole piece arranged on the frame; the pressing area is an area corresponding to the first pole piece in the frame, and the area can enable the first pole piece to deform when being pressed;

and the capacitance detection circuit is used for detecting the capacitance of the capacitance sensor.

14. The mobile terminal of claim 13, further comprising a motherboard disposed on the frame, the capacitance detection circuit disposed on the motherboard; and the mainboard is also provided with an application processor which is connected with the capacitance detection circuit and is used for controlling the capacitance detection circuit.

15. The mobile terminal according to claim 13 or 14, wherein the frame further has a bottom frame fixedly connected to the bezel, and a side frame fixedly connected to the bottom frame, wherein the side frame is opposite to and spaced apart from the bezel; the second pole piece is arranged on one side, facing the frame, of the side frame.

16. A mobile terminal according to any of claims 13-15, wherein the border is provided with indicia for identifying the pressing area.

17. The mobile terminal of any of claims 13-16, wherein the first pole piece is connected to the capacitance detection circuit and the second pole piece is connected to ground; or

The second pole piece is connected with the capacitance detection circuit, and the first pole piece is grounded.

18. The mobile terminal of any of claims 13-17, wherein the number of capacitive sensors is at least one, the number of press zones is at least one, and the at least one press zone is in one-to-one correspondence with the at least one capacitive sensor;

when the number of the capacitive sensors is at least two, a first pole piece in the at least two capacitive sensors is of an integral structure, and the first pole piece is grounded; second pole pieces in the at least two capacitive sensors are mutually insulated and are respectively connected with the capacitance detection circuit; or

The second pole pieces in the at least two capacitive sensors are of an integral structure, and the second pole pieces are grounded; the first pole pieces in the at least two capacitance sensors are mutually insulated and are respectively connected with the capacitance detection circuit.

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