TW201905668A - Pressure sensing touch control device for accurately calculating the pressure exerted by an external object on a pressure sensing touch panel and also enhancing the application and effect of touch control through pressure sensing - Google Patents

Abstract

The present invention provides a pressure sensing touch control device, which comprises a control unit and a pressure sensing touch control panel. The pressure sensing touch control panel sequentially includes a substrate, a first sensing layer, a first insulating layer, a driving layer, a second insulating layer and a second sensing layer. The first sensing layer, the driving layer and the second sensing layer are electrically connected to the control unit. When an external object touches the surface of the substrate of the pressure sensing touch control panel, the control unit detects the touch position according to a change in the amount of capacitive coupling generated between the first sensing layer and the driving layer, and detects the touch pressure according to another change in the amount of capacitive coupling generated between the driving layer and the second sensing electrode. Because the deformation caused by applying force to the second insulating layer is greater than that to the first insulating layer, the distance between the driving layer and the second sensing layer is closer and thus the change in the amount of capacitance coupling is more obvious, as a result, the pressure exerted by the external object on the pressure sensing touch control panel can be accurately calculated and the application and effect of touch control can be enhanced through the pressure sensing.

Description

 Pressure sensing touch device  

The present invention provides a pressure sensing touch device, in particular, the control unit can detect the position of an external object touched according to the change of the capacitive coupling between the first sensing layer and the driving layer of the touch sensitive touch panel. And another capacitance coupling amount change between the driving layer and the second sensing electrode accurately calculates the pressure of the touch position, thereby improving the application and effect of the touch.

According to the touch panel, the touch panel can be combined with the display screen to form a touch screen, which has been commonly used as an input interface of an electronic device for detecting touch input in the display area and depending on the touch used. The technology can be divided into a capacitive, resistive or optical touch panel, and the touch panel is provided with a sensing layer having a plurality of first conductive strips and a second conductive strip, and is driven and detected by the controller. The unit is electrically connected to the plurality of first electrodes and the plurality of second electrodes, and the processor controls the driving and detecting unit to generate sensing information for detecting the position of the touch point, and when the touch panel is operated, touch An electric field is formed between the two electrodes at the control point, and when a conductive object such as a finger or a stylus approaches or touches the touch panel, a part of the electric field is blocked to cause a change in the capacitance value at the touch point. The sensing information of the touch point can be detected to determine the position of the touch, and then the relevant operation mode is executed.

However, the existing touch device utilizes a physical quantity change generated when an external object approaches or touches the touch panel, such as a change in the capacitance value, thereby detecting a position at which an external object approaches or touches, and for the position. Generate different signals to provide electronic devices (such as notebooks, tablets, or smart phones) to perform related operations and functions to replace the traditional keyboard input, but most of the current touch panels can only detect The position of the touch is limited, and the function of the overall use is limited. The sensing information detected by the touch panel can also be used to calculate the pressure exerted by the external object on the touch panel, such as a finger or a soft material. The greater the pressure of the object pressing onto the touch panel, the larger the area of the touch panel will be. Therefore, the greater the amount of change in mutual capacitive coupling, the more external contact can be detected. The amount of increase in the area and the amount of change in the mutual capacitive coupling are used to calculate the pressure value to provide the electronic device as a new function, but the touch panel is based on the external object. The increase in contact area and the amount of change in capacitance calculate the pressure value. It is easy to change the difference in capacitance change due to the contact area on the touch panel, so that the detected pressure value is correct and accurate. The touch device is prone to misjudgment, and the wrong processing action is performed, so that the actual application effect of the touch device cannot be fully exerted, and it is difficult to meet the requirements of feasibility and practicability, that is, to be engaged in this. The industry is eager to study the key to improvement.

Therefore, in view of the above-mentioned problems and shortcomings, the inventors have collected such relevant information through various evaluations and considerations, and have used the trial and modification of many years of R&D experience in this industry to start such pressure sensing touch devices. The invention patent was born.

The main purpose of the present invention is to sequentially include a substrate, a first sensing layer, a first insulating layer, a driving layer, a second insulating layer and a second sensing layer, wherein the first sensing layer, The driving layer and the second sensing layer are electrically connected to the control unit. When the external object touches the surface of the substrate of the sensing touch panel, the control unit can be coupled according to the capacitive coupling between the first sensing layer and the driving layer. The amount of change detects the touch position, and another change in the amount of capacitive coupling generated between the driving layer and the second sensing electrode detects the pressure at the touch position, and the second insulating layer is subjected to a deformable material. The amount of deformation generated under pressure is greater than that of the first insulating layer, so that the distance between the driving layer and the second sensing layer is closer to each other, and the amount of capacitive coupling between the first sensing layer and the driving layer is changed. Obviously, the pressure applied by the external object to the pressure sensitive touch panel can be accurately calculated, and the touch sensing application can be further diversified through the pressure sensing.

The secondary object of the present invention is that the touch sensitive touch panel has a touch sensing unit and a pressure sensing unit, wherein the touch sensing unit is composed of a substrate, a first sensing layer, a first insulating layer and a driving layer. The pressure sensing unit is composed of a second insulating layer and a second sensing layer, so that the control unit can detect the pressure sensitive touch panel and the external object according to the touch sensing unit and the pressure sensing unit, respectively. The amount of change in the amount of capacitive coupling generated, and the position of the external object touched and the pressure applied to the pressure sensitive touch panel are calculated, and then the control unit generates different signals to provide the electronic device as a new function. The first sensing layer and the second sensing layer use a driving layer together, and the pressure sensing unit can be integrated on the touch sensing unit, and the thickness of the laminated layer of the pressure sensitive touch panel can be reduced, and the feeling is The reduced touch panel also simplifies the overall structure and reduces the cost of assembly and manufacturing in the case of reduced thickness.

Another object of the present invention is that the touch sensitive touch panel includes a touch sensing unit and a pressure sensing unit, and further includes a display pixel unit, and includes a common electrode, a liquid crystal layer, and a pixel electrode in the display pixel unit. The liquid crystal layer can be disposed between the common electrode and the pixel electrode, and the common electrode and the pixel electrode are electrically connected to the control unit respectively. When the control unit sends the driving signal to the pixel electrode and the common electrode, the liquid crystal layer can be driven. The image display shows that the common electrode of the display pixel unit is used as the second sensing layer, so that the display pixel unit is integrated on the pressure sensing unit and has the function of the display panel, and does not need to be additionally attached to the display panel. And assembly, thereby enhancing the application and effect of the touch.

10‧‧‧Control unit

11‧‧‧Drive and Detection Unit

12‧‧‧ Processor

13‧‧‧ memory

20‧‧‧pressure touchpad

201‧‧‧Touch sensing unit

202‧‧‧ Pressure sensing unit

203‧‧‧Display pixel unit

21‧‧‧Substrate

22‧‧‧First sensing layer

221‧‧‧First sensing electrode

23‧‧‧First insulation

24‧‧‧Drive layer

241‧‧‧ drive electrodes

25‧‧‧Second insulation

251‧‧‧ buffer

252‧‧‧Support

253‧‧‧Transformation space

26‧‧‧Second sensing layer

261‧‧‧Second sensing electrode

262‧‧‧Common electrode

263‧‧‧ shading layer

264‧‧‧Upper substrate

265‧‧‧First Polarization Layer

27‧‧‧Liquid layer

28‧‧‧pixel electrode

280‧‧‧thin film layer

281‧‧‧lower substrate

282‧‧‧Second polarizing layer

30‧‧‧External objects

C1~C2‧‧‧Capacitive coupling

C2’‧‧‧Capacitive coupling

δ 1~δ 2‧‧‧ deformation

The first figure is a simple block diagram of the present invention.

The second figure is a schematic diagram of the architecture of the present invention.

The third figure is a schematic structural view of the first embodiment of the present invention.

The fourth figure is a schematic structural view of the first embodiment of the present invention when it is in contact with an external object.

Fig. 5 is a schematic view showing the structure of an external object according to the first embodiment of the present invention.

Figure 6 is a schematic view showing the structure of a second embodiment of the present invention.

Figure 7 is a schematic view showing the structure of a third embodiment of the present invention.

Figure 8 is a schematic view showing the structure of an external object when it is pressed in the third embodiment of the present invention.

Figure 9 is a schematic view showing the structure of a fourth embodiment of the present invention.

The tenth figure is a schematic structural view of a fifth embodiment of the present invention.

In order to achieve the above objects and effects, the technical means and constructions of the present invention will be described in detail with reference to the preferred embodiments of the present invention.

Please refer to the first, second, third, fourth, fifth and sixth figures, which are respectively a simple block diagram, a schematic diagram of the structure, a schematic diagram of the structure of the first embodiment, a schematic diagram of the structure when the external object is in contact, and a pressing structure. FIG. 2 is a schematic view of the structure of the second embodiment. The pressure sensing touch device of the present invention includes a control unit 10 and a pressure sensitive touch panel 20, wherein the control unit 10 includes a drive and The detecting unit 11 and the processor 12 are electrically connected to the sensing touch panel 20 by the driving and detecting unit 11 to operably couple the touch panel 20, and the processor 12 is electrically connected to the driving The detecting unit 11 controls the generating of the sensing information, and the processor 12 can be electrically connected to the memory 13 so that the sensing information can be stored in the memory 13 for the processor 12 to access.

The pressure sensitive touch panel 20 sequentially includes the substrate 21, the first sensing layer 22, the first insulating layer 23, the driving layer 24, the second insulating layer 25, and the second sensing layer 26, and the lower surface of the substrate 21 A first sensing layer 22 is disposed, and a first insulating layer 23 is disposed between the first sensing layer 22 and the driving layer 24, and a second insulation is disposed between the driving layer 24 and the second sensing layer 26. The first sensing layer 22, the driving layer 24 and the second sensing layer 26 are respectively electrically connected to the driving and detecting unit 11 of the control unit 10, and the driving signal is sent by the driving and detecting unit 11 to The driving layer 24 is received, and the sensing signals returned by the first sensing layer 22 and the second sensing layer 26 are respectively received.

In this embodiment, the driving layer 24 includes a plurality of driving electrodes 241 arranged in parallel along a first direction (such as a longitudinal axis direction), and the first sensing layer 22 and the second sensing layer 26 respectively include a plurality of strips along the first The first sensing electrode 221 and the second sensing electrode 261 are arranged in parallel in the two directions (such as the horizontal axis direction), and the first sensing electrode 221 and the second sensing electrode 261 are respectively crossed with the driving electrode 241, and each A plurality of sensing points are respectively formed at the intersection of the electrodes, and the driving and detecting unit 11 is controlled by the processor 12 to send a driving signal to the driving layer 24, and passes through the first sensing layer 22 and the second sensing. The layer 26 detects the capacitive coupling amount of the sensing point to generate a sensing information.

However, the substrate 21 may be a transparent substrate made of an insulating material such as glass or plastic, and has appropriate elasticity, and may be bent downward when the external object 30 (such as a finger or a stylus tip) presses a predetermined degree. The first sensing layer 22, the driving layer 24 and the second sensing layer 26 can be respectively made of a transparent conductive film through a lithography process, and the first insulating layer 23 can be various transparent and elastic inorganic or The organic insulating material is formed to electrically isolate the first sensing layer 22 and the driving layer 24, and the second insulating layer 25 under the first insulating layer 23 is made of a transparent deformable material, and the first The second insulating layer 25 includes a buffer body 251 integrally formed of an elastic or compressible material such as silicone rubber, optical glue or foam.

As shown in the fourth and fifth figures, when the external object 30 (such as the user's finger) is close to the first sensing layer 22 of the touch panel 20, the processor 12 of the control unit 10 controls the driving and detecting. The unit 11 detects a change in the capacitive coupling amount C1 generated between the first sensing layer 22 and the driving layer 24, and determines the position of the external object 30, and the driving layer 24 and the second sensing layer 26 are generated. There is another capacitive coupling amount C2, but the other capacitive coupling amount C2 detected by the driving and detecting unit 11 does not change significantly, and the external object 30 is pressed against the pressure sensitive touch panel. In the process of 20, since the material of the second insulating layer 25 has a higher modulus of elasticity than the first insulating layer 23, the deformation amount δ 2 when the unit area of the second insulating layer 25 is subjected to the force of the external object 30 can be made. The thickness of the first insulating layer 23 does not change significantly, but the thickness of the first insulating layer 23 does not change significantly, but the second insulating layer 25 changes significantly, and the driving layer 24 and the second feeling are changed. As the distance between the layers 26 is closer, the capacitance value will change more, causing the drive Layer 24 and a further amount of capacitive coupling between the second sensing layer 26 is changed to C2 C2 ', and the amount of coupling the first sensing layer 22 and the driving layer 24 between the capacitor C1 changes significantly different.

Therefore, the control unit 10 of the present invention can not only know the touch position of the external object 30 according to the amount of change in the capacitive coupling amount C1 between the touch sensitive touch panel 20 and the external object 30, but also according to another capacitive coupling amount. C2 is changed to the amount of change of C2' to accurately calculate the magnitude of the pressure exerted on the pressure sensitive touch panel 20 by the external object 30, the change trend, etc., to determine the gesture and touch mode related to the pressure magnitude or the pressure change trend, etc. For example, the proximity, departure or tracking of the movement of the finger, etc., and the control unit 10 can simultaneously detect the change amount of the capacitive coupling amount C1 and the other capacitive coupling amount C2, or separately detect the capacitive coupling amount C1 at different times. The amount of change in coupling amount C2 with another capacitance.

Furthermore, the electronic device to which the pressure sensing touch device of the present invention can be applied includes, but is not limited to, a notebook computer, a tablet computer, a smart phone, etc., and the pressure sensitive touch panel 20 includes the substrate 21 and the first sense. The sensing layer 22, the first insulating layer 23, the driving layer 24, the second insulating layer 25, and the second sensing layer 26 further include a touch sensing unit 201 and a pressure sensing unit 202. The touch sensing unit 201 is The substrate 21, the first sensing layer 22, the first insulating layer 23 and the driving layer 24 are assembled, and the pressure sensing unit 202 is composed of the second insulating layer 25 and the second sensing layer 26. The control unit 10 can detect the amount of change in the capacitive coupling amounts C1 and C2 generated between the pressure sensitive touch panel 20 and the external object 30 according to the touch sensing unit 201 and the pressure sensing unit 202, respectively, and calculate When the external object 30 touches the position and the pressure applied to the pressure sensitive touch panel 20, the control unit 10 generates different signal outputs according to the detected touch position and pressure change of the external object 30, etc., Provides an electronic device to replace the traditional keyboard's press input (such as a character symbol or finger The input of the device can also make the touch application more diversified through the pressure sensing. The first sensing layer 22 and the second sensing layer 26 use a driving layer 24 in common, and the pressure sensing can be performed. The unit 202 is integrated on the touch sensing unit 201, so that the pressure sensing touch device can not only detect the touch position, but also detect the pressure value received by the touch position, and can also reduce the pressure sensitive touch panel. The thickness of the 20-layer structure is stacked, and the pressure-sensitive touch panel 20 can simplify the overall structure and reduce the cost of assembly and manufacturing in the case of a reduction in thickness.

As shown in the sixth figure, the pressure sensitive touch panel 20 in this embodiment is different from the above embodiment in that the second insulating layer 25 includes a support portion 252, and the support portion 252 may be in the middle of the second insulating layer 25. a plurality of spacers arranged in a space, or a grid-like structure formed by intersecting the first direction (such as the longitudinal axis direction) with the second direction (such as the horizontal axis direction), and forming deformation between or within the support portion 252 The space 253, therefore, the second insulating layer 25 of the present invention in different embodiments is mainly only different in structural design, and has greater elasticity than the material of the first insulating layer 23, causing deformation caused by the force. The amount is also larger, so it is explained together in the contents of the following description of the case, and is combined with Chen Ming.

Please refer to the third, fifth, seventh, and eighth diagrams, which are respectively a schematic structural view of the first embodiment of the present invention, a structural schematic diagram when the external object is pressed, a structural diagram of the third embodiment, and a structure when the external object is pressed. As shown in the figure, the touch sensitive touch panel 20 in the present embodiment further includes a display pixel unit 203 under the touch sensing unit 201 and the pressure sensing unit 202, and is displayed on the display pixel. The unit 203 includes a common electrode 262, a liquid crystal layer 27 and a pixel electrode 28, and the liquid crystal layer 27 is disposed between the common electrode 262 and the pixel electrode 28, and the common electrode 262 and the pixel electrode 28 are electrically connected to the control unit 10, respectively. And the detecting unit 11 and the common electrode 262 is used as the second sensing layer 26, and the plurality of second sensing electrodes 261 are disposed in the common electrode 262, and may be disposed on the common electrode 262 and the second insulating layer. Between 25, the driving signal is sent to the pixel electrode 28 and the common electrode 262 by the control unit 10 to drive the liquid crystal layer 27 to perform image display to the display panel.

When the external object 30 (such as the tip of a finger or a stylus pen) is pressed on the substrate 21, the control unit 10 can detect the change in the capacitive coupling amount C1 generated between the first sensing layer 22 and the driving layer 24, respectively. The touch position, and another capacitance coupling amount C2′ generated between the driving layer 24 and the second sensing electrode 261 detects the pressure received by the touch position, and utilizes the common electrode 262 in the display pixel unit 203. As the second sensing layer 26 is used, the display pixel unit 203 can be integrated into the pressure sensing unit 202 to have the function of the display panel, and the display panel cannot be attached or assembled separately to enhance the touch. Control the application and effectiveness and save the cost of the end product parts.

Please refer to the ninth and tenth drawings, which are respectively a schematic structural view of the fourth embodiment of the present invention and a schematic structural view of the fifth embodiment. As can be clearly seen from the figure, the pressure sensitive touch in the embodiment The difference between the embodiment of the seventh embodiment is that the second sensing layer 26 further includes a light shielding layer 263, an upper substrate 264, and a first polarizing layer 265, and the light shielding layer 263 is disposed on the upper surface of the common electrode 262. The upper surface of the light shielding layer 263 is sequentially provided with an upper substrate 264, a second sensing electrode 261 and a first polarizing layer 265, and the light shielding layer 263 comprises a color filter, and the pixel electrode 28 further comprises a thin film transistor layer. 280, and the pixel electrode 28 is disposed in the thin film transistor layer 280. The lower surface of the thin film transistor layer 280 is sequentially provided with a lower substrate 281 and a second polarizing layer 282, and the upper substrate 264 and the lower substrate 281 may be made of an insulating material. The transparent substrate, wherein the lower substrate 281 is also a TFT glass substrate, and when the thin film transistor layer 280 performs an update scan of the display pixel unit 203 to display the picture frequency, the second sensing electrode 261 of the second sensing layer 26 is generated. Electromagnetic interference (EMI) affects it The detection effect of the mutual capacitive coupling can be achieved by the common electrode 262 being coupled to the DC potential to form the shielding region, and the common electrode 262 is disposed between the thin film transistor layer 280 and the second sensing electrode 261 to reduce The thin film transistor layer 280 performs electromagnetic interference generated during the update scanning, and is disposed between the upper substrate 264 and the first polarizing layer 265 through the second sensing electrode 261, so that the upper substrate 264 can further prevent the second sensing electrode. 261 is affected by the shielding effect of the common electrode 262.

As shown in the tenth figure, the difference between the second sensing layer 26 and the embodiment of the ninth embodiment is that the second sensing electrode 261 is disposed in a position not limited thereto, and may be second. The sensing electrode 261 is disposed between the light shielding layer 263 and the upper substrate 264 (as shown in FIG. 10), and the second sensing electrode 261 may be disposed on the light shielding layer 263, the upper substrate 264 or the first polarizing layer 265. The electromagnetic interference generated when the thin film transistor layer 280 is subjected to the update scan can be reduced by the shield region of the common electrode 262.

Therefore, the present invention mainly includes the substrate 21, the first sensing layer 22, the first insulating layer 23, the driving layer 24, the second insulating layer 25, and the second sensing layer 26, respectively. A sensing layer 22, a driving layer 24 and a second sensing layer 26 are electrically connected to the control unit 10. When the external object 30 touches the surface of the substrate 21, the first sensing layer 22 can be The change in the amount of capacitive coupling generated between the driving layers 24 detects the touch position, and another change in the amount of capacitive coupling generated between the driving layer 24 and the second sensing electrode 26 detects the pressure at the touch position, and When the second insulating layer 25 is deformed by a deformable material, the amount of deformation generated by the pressure is greater than that of the first insulating layer 23, so that the distance between the driving layer 24 and the second sensing layer 26 is close, and the capacitive coupling amount is more obvious. The pressure applied by the external object 30 on the pressure sensitive touch panel 20 is accurately calculated.

The detailed description of the present invention is intended to be a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and other equivalents and modifications may be made without departing from the spirit of the invention. Changes are intended to be included in the scope of the patents covered by the present invention.

In summary, the above-mentioned pressure sensing touch device of the present invention can achieve its efficacy and purpose when used, so the invention is an invention with excellent practicability, and is in fact conforming to the application requirements of the invention patent, and submitting an application according to law. I hope that the trial committee will grant this case as soon as possible to protect the inventor's hard work. If there is any doubt in the bureau, please do not hesitate to give instructions to the inventor, and the inventor will try his best to cooperate with him.

Claims (9)

 A pressure sensing touch device for detecting a touch position of an external object and a pressure of the touch position includes: a control unit, the control unit includes a driving and detecting unit and a processor, the driving And the detecting unit is electrically connected to the first sensing layer, the driving layer and the second sensing layer, the processor is electrically connected to the driving and detecting unit, and controls the driving and detecting unit to send out Driving the signal to the driving layer, and respectively receiving the sensing signals sent back by the first sensing layer and the second sensing layer to detect the capacitive coupling amount; and the sensing touch panel sequentially includes a substrate a first sensing layer, a first insulating layer, a driving layer, a second insulating layer and a second sensing layer, wherein the first sensing layer, the driving layer and the second sensing layer are electrically Connected to the control unit, the control unit is configured to detect a change in the amount of capacitive coupling generated between the first sensing layer and the driving layer when the external object touches the substrate, and detect the touch a position, and another between the drive layer and the second sensing electrode Detecting changes in the amount of capacitive coupling of the touch position of the pressure, the amount of deformation of the second insulating layer when subjected to the pressure is greater than the first insulating layer.    The pressure sensing touch device of claim 1, wherein the driving layer comprises a plurality of driving electrodes arranged in parallel along the first direction, wherein the first sensing layer and the second sensing layer are respectively The first sensing electrode and the second sensing electrode are arranged in parallel along the second direction, and the plurality of first sensing electrodes, the plurality of second sensing electrodes and the plurality of driving electrodes are vertically intersected Do not form a plurality of sensing points.    The pressure sensing touch device of claim 2, wherein the control unit further comprises a memory, the memory system is electrically connected to the processor for storing the processor according to the driving and detecting The unit detects the sensing information generated by the capacitive coupling amount of the plurality of sensing points.    The pressure sensing touch device of claim 1, wherein the substrate, the first sensing layer, the first insulating layer, the driving layer, the second insulating layer and the second sensing layer All are transparent materials.    The pressure sensing touch device of claim 1, wherein the first insulating layer is made of a transparent inorganic or organic insulating material, and the second insulating layer has a modulus of elasticity greater than the first An insulating layer is configured to deform the second insulating layer by a force of the external object greater than the first insulating layer.    The pressure sensing touch device of claim 5, wherein the second insulating layer is integrally formed with a buffer body.    The pressure sensing touch device of claim 5, wherein the second insulating layer comprises a plurality of supporting portions, and a deformation space is formed between the plurality of supporting portions.    The pressure sensing touch device of claim 5, wherein the second insulating layer comprises a transparent material of silicone, optical glue or foam.    The pressure sensing touch device of claim 1, wherein the pressure sensitive touch panel has a touch sensing unit and a pressure sensing unit, wherein the touch sensing unit is composed of the substrate, The first sensing layer, the first insulating layer and the driving layer are formed by the second insulating layer and the second sensing layer, and the touch sensing unit and the pressure The sensing unit uses the driving layer in common.