WO2018094613A1

WO2018094613A1 - Pressure detection apparatus, touch control screen and touch control terminal

Info

Publication number: WO2018094613A1
Application number: PCT/CN2016/106956
Authority: WO
Inventors: 刘相英; 张胜斌; 许炜添
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2016-11-23
Filing date: 2016-11-23
Publication date: 2018-05-31
Also published as: CN206805504U

Abstract

Disclosed are a pressure detection apparatus (100), a touch control screen and a touch control terminal. The pressure detection apparatus (100) comprises a first sensing electrode (110), a second sensing electrode (120) and a ceramic assembly (140), wherein the first sensing electrode (110) is arranged on the ceramic assembly (140); and a capacitor for detecting a pressure applied to the pressure detection apparatus (100) is formed between the first sensing electrode (110) and the second sensing electrode (120). The pressure detection apparatus (100), the touch control screen and the touch control terminal can improve the accuracy of pressure detection.

Description

Pressure detecting device, touch screen and touch terminal

Technical field

The present application relates to the field of pressure detection technologies, and in particular, to a pressure detecting device, a touch screen, and a touch terminal.

Background technique

With the continuous development of science and technology, users have higher and higher functional requirements for electronic devices (such as mobile phones and tablets), and the pressure sensing function has become an important function for electronic devices to further improve user physical examination. After the electronic device uses the pressure detecting device to realize the pressure detection, the information of the pressure dimension can be utilized to develop the application function of the electronic device.

The pressure detecting device generally includes two opposite sensing electrodes separated by a support member, one of which is located on the flexible circuit board, and then the flexible circuit board is bonded to the metal frame by bonding. When pressure is applied to the sensing electrode in the pressure detecting device opposite to the sensing electrode on the flexible circuit board, under the support of the support member, the opposite sensing electrode may be structurally deformed, thereby causing the two sensing electrodes The sensing capacitance between them changes. The amount of change in the distance between the two sensing electrodes can be determined based on the change in the sensing capacitance between the two sensing electrodes, and then the pressure applied to the pressure detecting device can be determined based on the amount of change.

Wherein, because the surface of the metal frame and the flexible printed circuit (FPC) supporting the sensing electrode have low flatness, the sensitivity of the determined change of the distance between the two sensing electrodes is low, thereby affecting the pressure sensing. The performance ultimately affects the user's experience.

Summary of the invention

The application provides a pressure detecting device, a touch screen and a touch terminal, which can improve the accuracy of detecting the pressure.

In a first aspect, the present application provides a pressure detecting device including a first sensing electrode, a second sensing electrode, and a ceramic component; the first sensing electrode is disposed on the ceramic component; A capacitance for detecting a pressure applied by the pressure detecting device is formed between a sensing electrode and the second sensing electrode.

In the pressure detecting device of the present application, the first sensing electrode is placed on the ceramic component with higher flatness, and the flatness between the first sensing electrode and the second sensing electrode can be improved. First sensing electrode and second sense The high flatness between the electrodes may be such that when pressure is applied to the second sensing electrode in the pressure detecting device, the first sensing electrode and the second sensing electrode can more sensitively induce a change in the distance between the two sensing electrodes. In turn, the applied force is detected more sensitively and accurately, and the accuracy of the pressure detecting device is finally improved.

In a possible implementation, the ceramic component is integrally formed of ceramic and plastic.

In a possible implementation, the ceramic component includes a ceramic component and at least one plastic block, the at least one plastic block is fixed on the ceramic component, and the at least one plastic block is located on the first sensing electrode. The same surface on the pressure detecting device.

In a possible implementation, the ceramic component has a rubberized structure, and the plastic block is fixed on the ceramic component by the rubberized structure.

In a possible implementation, the ceramic component includes a ceramic component and a metal frame disposed on a periphery of the ceramic component, and the first sensing electrode is located on the ceramic component.

By providing a metal frame around the periphery of the ceramic member, it is advantageous to form a narrow bezel.

In a possible implementation, a support member between the first sensing electrode and the second sensing electrode is further included.

In a second aspect, a touch screen is provided, including a cover, a display module, and the pressure detecting device described in any of the possible implementations of the first aspect or the first aspect of the first aspect, The ceramic component is disposed on a back shell of the display module.

In a possible implementation manner, the display module is a liquid crystal display LCD module or an organic light emitting diode OLED module.

In a possible implementation manner, the display module is an LCD module, and the LCD module includes an LCD display, a backlight module disposed under the LCD display, and supporting the LCD display and the The back shell of the backlight module.

In a possible implementation manner, the second sensing electrode is disposed on an upper surface of the lower glass of the LCD display screen.

In a third aspect, a touch terminal is provided, including the touch screen described in any of the possible implementation manners of the second aspect or the second aspect of the second aspect.

DRAWINGS

1 is a schematic structural view of a pressure detecting device of an embodiment of the present application.

2 is another schematic structural view of a pressure detecting device of an embodiment of the present application.

Fig. 3 is another schematic structural view of a pressure detecting device of an embodiment of the present application.

4 is another schematic structural view of a pressure detecting device of an embodiment of the present application.

Fig. 5 is another schematic structural view of a pressure detecting device of an embodiment of the present application.

Fig. 6 is another schematic structural view of a pressure detecting device of an embodiment of the present application.

FIG. 7 is a schematic structural view of a pressure detecting device applied to a liquid crystal module according to an embodiment of the present application.

detailed description

FIG. 1 is a schematic structural view of a pressure detecting device 100 according to an embodiment of the present application. It should be understood that the pressure detecting device shown in FIG. 1 is only an example, and the pressure detecting device of the embodiment of the present application may further include other modules or units, or include modules similar to those of the respective modules in FIG. 1, or may not include All the modules in Figure 1.

The pressure detecting device 100 includes a first sensing electrode 110, a second sensing electrode 120, and a ceramic component 140.

The first sensing electrode 110 is placed on the ceramic component 140. A capacitance is formed between the first sensing electrode 110 and the second sensing electrode 120 for detecting the pressure applied by the pressure detecting device 100.

The first sensing electrode in the pressure detecting device in the embodiment of the present application is placed on the ceramic component with higher flatness, and the ceramic component can improve the flatness between the first sensing electrode and the second sensing electrode. For example, the flatness of the ceramic component itself can be controlled within 0.05 mm.

The high flatness between the first sensing electrode and the second sensing electrode can make the first sensing electrode and the second sensing electrode more sensitively induce the two sensing electrodes when applying pressure to the second sensing electrode in the pressure detecting device. The change in the distance between the electrodes, in turn, more sensitively and accurately detects the applied force, and ultimately improves the detection accuracy of the pressure detecting device.

In general, the thickness of the ceramic component 140 can be selected in the range of several hundred to several thousands of micrometers, which can reduce the weight of the pressure detecting device 100.

Optionally, as shown in FIG. 1 , the pressure detecting device 100 further includes a support member 130 , and the support member 130 is located between the first sensing electrode 110 and the second sensing electrode 120 .

Specifically, the support member 130 is configured to isolate the first sensing electrode 110 and the second sensing electrode 120, so that a gap exists between the first sensing electrode 110 and the second sensing electrode 120.

Alternatively, the first sensing electrode 110 may be plated on the ceramic component 140.

Alternatively, as shown in FIG. 2, the first sensing electrode 110 in the pressure detecting device 100 may be located on the flexible circuit board 150, and then the flexible circuit board 150 is placed on the ceramic component 140. At this time, soft The circuit board 150 can be attached to the ceramic component 140 by gluing.

Alternatively, the ceramic component 140 may be integrally formed of ceramic and plastic. Alternatively, the ceramic component 140 can include a ceramic piece and at least one plastic block that is secured to the ceramic piece. The at least one plastic block and the first sensing electrode are located on the same surface of the pressure detecting device. Specifically, the one or more plastic blocks are located on the side of the ceramic member on which the first sensing electrode 110 is located.

It should be understood that the plastic block is only a name for the plastic for fixing the ceramic member. The embodiment of the present application does not limit the shape of the plastic for fixing the ceramic member, and the plastic may be in the form of a strip, a plate or any other shape.

As shown in FIG. 3, the ceramic member 143 may have one or more plastic blocks 141 thereon, such as the ceramic member 143 may be fixed by the one or more plastic blocks 141 to other devices or devices using the pressure detecting device to which the ceramic member 143 belongs. on.

More specifically, for example, the ceramic member 143 can be fixed to the cover of the touch screen through the one or more plastic blocks 141, so that the pressure detecting device to which the ceramic member 143 belongs can form a pressure with the touch screen. Detect the touch screen.

For another example, the ceramic member 143 can be fixed to the cover of the touch keyboard through the one or more plastic blocks 141, so that the pressure detecting device to which the ceramic member 143 belongs and the touch keyboard can constitute a pressure detecting touch keyboard.

Generally, the ceramic member 143 can also have a pull-up structure, and the rubber-bonding structure is combined with the plastic block, so that the combination of the ceramic member 143 and the plastic block 141 is more tight.

Optionally, as shown in FIG. 4, the ceramic component 140 may further include a ceramic member 141 and a metal frame 142 disposed at a periphery of the ceramic member 143, and the first sensing electrode is located on the ceramic member 143. For example, the ceramic component 140 can be secured to other devices or devices using the pressure sensing device to which the ceramic component 140 belongs via the metal frame 142. In the embodiment of the present application, by providing a metal frame around the ceramic member, it is advantageous to form a narrow frame.

More specifically, for example, the ceramic member 143 can be fixed to the cover of the touch screen through the metal frame 142, so that the pressure detecting device to which the ceramic member 143 belongs and the touch screen can form a pressure detecting touch screen.

For another example, the ceramic component 143 can be fixed to the cover of the touch keyboard through the metal frame 142, so that the pressure detecting device to which the ceramic member 143 belongs and the touch keyboard can constitute a pressure detecting touch keyboard.

Typically, the metal frame 142 is a stainless steel metal frame. The thickness of the metal frame 142 may be between several hundred and several thousand microns, which may make the pressure detecting device 100 lighter in weight.

Optionally, as shown in FIG. 5, the non-conductive medium 160 may be filled in a gap between the first sensing electrode 110 and the second sensing electrode 120 in the pressure detecting device 100. The non-conductive medium may be a foam or a film or the like.

The non-conductive medium 160 may be partially or completely filled in the gap between the first sensing electrode 110 and the second sensing electrode 120.

The pressure detecting device of the present application is described above with reference to FIGS. 1 to 5. Hereinafter, the touch screen and the touch device of the embodiment of the present application will be described. Alternatively, as shown in FIG. 6, the pressure detecting device 100 may further include a cover plate 170. The cover plate 170 is disposed above the second sensing electrode 120.

When the pressure detecting device 100 includes a cover plate and the ceramic component 140 has a plastic or metal frame thereon, the ceramic component 140 can be fixed to the carrier plate 170 by a plastic and metal frame. At this time, the second sensing electrode 120 may also be disposed on the cover plate 170.

Alternatively, the pressure detecting device 100 can be applied to a liquid crystal display (LCD) module in an electronic device or an Organic Light-Emitting Diode (OLED) module. LCD liquid crystal module (Module) can also be called liquid crystal module, referred to as LCM.

Optionally, the embodiment of the present invention further provides a touch screen, comprising: a cover plate, a display module, and the pressure detecting device according to any one of the above embodiments, wherein the ceramic component is disposed on the back of the display module On the shell.

Optionally, the back shell may include a metal frame supporting the touch screen. Optionally, the display module is an LCD module or an OLED module.

Optionally, when the display module is an LCD module, the LCD module includes an LCD display, a backlight module disposed under the LCD display, and supporting the LCD display and the backlight module. The back shell of the group.

The backlight module may be referred to as a backlight assembly. The back shell may include a metal frame bracket.

Optionally, the second sensing electrode is disposed on an upper surface of the lower glass of the LCD display screen. For example, the LCD display may include an upper polarizer, an upper glass, a liquid crystal panel, a lower glass, and a lower polarizer from top to bottom. The second sensing electrode may be disposed on an upper surface of the lower glass.

For example, FIG. 7 shows a schematic structure in which the pressure detecting device 100 is applied to a liquid crystal module to form a pressure detecting touch screen. The pressure detecting touch screen shown in FIG. 7 includes a ceramic component 140, first The sensing electrode 110, the second sensing electrode 120, the support member 130, the backlight module 180, the LCD 190, and the cover plate 170.

The pressure detecting device 100 can also be applied to many application scenarios and devices, for example, can be applied to a keyboard to form a pressure detecting touch keyboard, which will not be described herein.

The pressure detecting device 100 can be used as a stand-alone device in combination with other devices, units, modules or devices, and of course can be an integral part of certain structures or electronic devices.

As an example, the embodiment of the present application further provides a touch terminal, which may include any one of the touch screens described above.

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

A pressure detecting device, characterized in that the pressure detecting device comprises a first sensing electrode, a second sensing electrode and a ceramic component;

The first sensing electrode is disposed on the ceramic component;

A capacitance for detecting a pressure applied by the pressure detecting device is formed between the first sensing electrode and the second sensing electrode.
The pressure detecting device according to claim 1, wherein the ceramic component is integrally formed of ceramic and plastic.
The pressure detecting device according to claim 1 or 2, wherein the ceramic component comprises a ceramic member and at least one plastic block, and the at least one plastic block is fixed on the ceramic member, the at least one plastic block And the first sensing electrode is located on the same surface of the pressure detecting device.
The pressure detecting device according to claim 3, wherein the ceramic component has a pull-on structure, and the plastic block is fixed to the ceramic member by the pull-up structure.
The pressure detecting device according to claim 1 or 2, wherein the ceramic component comprises a ceramic member and a metal frame disposed at a periphery of the ceramic member, and the first sensing electrode is located on the ceramic member.
The pressure detecting device according to any one of claims 1 to 5, further comprising a support member between the first sensing electrode and the second sensing electrode.
A touch screen includes a cover plate, a display module, and the pressure detecting device according to any one of claims 1 to 6, wherein the ceramic component is disposed on a back shell of the display module.
The touch screen of claim 7, wherein the display module is a liquid crystal display LCD module or an organic light emitting diode OLED module.
The touch screen of claim 7 or 8, wherein the display module is an LCD module, and the LCD module comprises an LCD display, a backlight module disposed under the LCD display, and Supporting the LCD display panel and the back shell of the backlight module.
The touch screen of claim 9, wherein the second sensing electrode is disposed on an upper surface of the lower glass of the LCD display.
A touch terminal comprising the touch screen according to any one of claims 7 to 10.