TWM522414U - High-precision force-touch sensor with multilayered electrodes - Google Patents

Description

High-accuracy touch sensing device with multi-layer electrode structure

The present invention relates to an inductive device, and more particularly to a high-accuracy touch-sensing device having a multi-layer electrode structure.

The thin and short mobile device drives the trend of the touch display panel, and the demand for the human touch interface technology and the user's demand for the operation of the 3D touch are constantly increasing, and the pressure touch technology is also updated. At the same time, robots are widely used in industry and even in offices, hospitals and homes, and the demand for artificial haptic devices is growing rapidly. Conventional haptic control applications such as a pressure touch display panel place a plurality of MEMS pressure sensors on the edge or corner of the display panel to sense the touch pressure of the panel surface; or to sense a plurality of MEMS pressure sensors The device is placed inside the simulated skin of the robot to realize the detection of touch and pressure, which is not only costly but also difficult to install and fit the wiring. In addition, there are also artificial skins using conductive rubber, conductive sponge or carbon fiber to reverse the impedance change and pressure value by measuring the current change, which consumes electricity and has low precision. And the above is not able to detect the proximity of crop parts, so there is still room for improvement in pressure touch and artificial haptic devices.

In order to improve the shortcomings of the above-mentioned prior art, the aim of the present invention is to provide a high-accuracy touch-sensing device with a multi-layer electrode structure to improve the accuracy of pressure touch.

In order to achieve the above object of the present invention, a high-accuracy touch sensing device having a multi-layer electrode structure comprises: an upper substrate, the upper substrate comprising a first surface and a first surface opposite to the first surface a second electrode layer, the first electrode layer is disposed on one surface of the upper substrate, the first electrode layer includes a plurality of first sensing electrodes, and a second electrode layer, the second electrode layer Provided with respect to the first electrode layer, and further away from the upper substrate than the first electrode layer, comprising a plurality of second sensing electrodes, and the second sensing electrodes are paired with the first sensing electrodes Correspondingly connected to the corresponding first sensing electrodes to form a plurality of touch sensing electrodes; a plurality of touch electrode traces, each touch electrode trace corresponding to a touch sensing electrode and electrically connected Electrically insulated from the other touch sensing electrodes; a layer of elastic dielectric material disposed on the side of the second electrode layer facing away from the upper substrate, and the layer of the elastic dielectric material is under pressure Compressing deformation and returning to the original volume and shape when the pressure is removed; and a third electrode layer disposed on the side of the elastic dielectric material facing away from the upper substrate, which comprises at least A pressure sensing electrode.

The detailed description and technical contents of the present invention are described in the following detailed description and the accompanying drawings.

Please refer to FIG. 1A , which is a schematic diagram of a high-accuracy touch sensing device 10 having a multi-layer electrode structure according to an embodiment of the present invention. The high-accuracy touch-sensing device 10 (hereinafter referred to as the touch-sensing device 10) of the multi-layer electrode structure comprises a substrate 100, a top-down substrate (with a user's finger or a stylus contact as a reference direction). a first electrode layer 110, a second electrode layer 120, an insulating layer 130, an elastic dielectric material layer 200, and a third electrode layer 300. Further, the touch sensing device 10 further includes a plurality of touch electrode traces. 150 is disposed between the upper substrate 100 and the layer of elastic dielectric material 200. The upper substrate 100 has a first surface 100a and a second surface 100b opposite to the first surface. The first electrode layer 110 is disposed on one surface of the upper substrate 100 (for example, the first example shown in this example) The second surface 100b), and the first electrode layer 110 includes a plurality of first sensing electrodes 112, such as the first sensing electrodes E11~E19 as shown in FIG. 1A, but it should be understood that the figure is only a side view. Therefore, the number and distribution of the first sensing electrodes are not limited thereto. The second electrode layer 120 is disposed on one side of the first electrode layer 110 opposite to the upper substrate 100 , that is, disposed opposite to the first electrode layer 110 and further away from the upper substrate 100 . The second electrode layer 120 includes a plurality of second sensing electrodes 122. The second sensing electrodes 122 are in one-to-one correspondence with the first sensing electrodes 112 and are electrically connected to the corresponding first sensing electrodes 112. a plurality of touch sensing electrodes 160 are formed. The first electrode layer 110 and the second electrode layer 120 are sandwiched between the insulating layers 130. In other words, the second sensing electrodes 122 are transparent to the insulating layer. The interlayer connection electrodes 130 (V1 to V9 as shown) are connected to the corresponding first sensing electrodes 112.

The touch electrode traces 150 (W1 to W9 as shown) are corresponding to and electrically connected to one touch sensing electrode 160 and electrically insulated from other touch sensing electrodes. In this embodiment, the touch electrode traces 150 are coplanar with the first sensing electrodes 112 and are covered by the second sensing electrodes on the projection (viewed by the top of the touch sensing device 10). Therefore, when the touch sensing device 10 performs pressure sensing, the first sensing electrode 112 can effectively shield the charge interference from the finger, so that the pressure sensing is more accurate. The layer of elastic dielectric material 200 is compressively deformed in volume upon pressure and returns to its original volume and shape upon removal of pressure. The third electrode layer 300 is disposed on one side of the elastic dielectric material layer 200 facing away from the upper substrate 100, and includes at least one pressure sensing electrode 170 (for example, the third electrode layer 300 shown in FIG. 1A includes two pressures Inductive electrode 170), and in the following embodiments, although the detailed configuration of the third electrode layer 300 is not depicted for simplicity of illustration, the third electrode layer 300 includes at least one pressure sensing electrode 170; The touch sensing device 10 further includes a capacitance detecting circuit 50. The capacitance detecting circuit 50 includes a capacitive excitation driving circuit 52 and a capacitance reading circuit 54.

Referring to FIG. 1A, a high-accuracy touch sensing device 10 having a multi-layer electrode structure of the present invention is used for the operational state of tactile sensing. The capacitive excitation driving circuit 52 includes a signal source 520 and a driver 522, and sequentially or randomly applies a touch capacitive sensing signal VT to the selected one of the touch sensing electrodes 160 (eg, the first sensing) Electrode E14 and the second sensing electrode E24). In addition, the capacitive excitation driving circuit 52 sends the touch capacitive induction excitation signal VT to a non-inverting amplifier 56. The gain value of the non-inverting amplifier 56 is preferably one to generate an auxiliary signal in phase with the touch capacitive sensing excitation signal VT ( The auxiliary signal VT1 is applied to the opposite at least one pressure sensing electrode 170. Since the signal of the same phase as the touch capacitive sensing excitation signal VT is applied to the opposite at least one pressure sensing electrode 170, the touch sensing electrode 160 (E14, E24) and the corresponding at least one pressure sensing can be equivalently selected. There is no voltage difference or almost no voltage difference between the electrodes 170, that is, no capacitance is generated or only a small amount of capacitance is generated (the micro capacitance that does not affect the touch sensing result) can be avoided. When the touch operation of the touch sensing electrode 160 is selected, the capacitive interference occurs due to the warpage of the elastic dielectric material layer 200, and the parallel connection between the pressure sensing electrode 170 and the grounding point is also prevented. interference.

Similarly, the auxiliary signal VT1 can also be applied to the touch sensing electrodes 160 around the selected touch sensing electrodes 160 (E14, E24) to eliminate the selected touch sensing electrodes and their surrounding touch sensing. The stray capacitance effect between the electrodes and the effect of gathering and topping the power lines above the selected touch sensing electrodes enhances the sensitivity of the proximity sensing.

Moreover, in the present creation, tactile sensing includes touch sensing of the user's finger actually contacting the upper substrate 100 and proximity sensing of the user's finger approaching the upper substrate 100. When the user's finger actually touches the touch sensing device 10 or approaches the touch sensing device 10, the capacitance value associated with the first sensing electrode inside the touch sensing device 10 is affected, so by sensing the capacitance value, it is possible to detect Test for finger contact or proximity. In the following description, the touch sensing includes two operations of touch sensing and proximity sensing.

The high-accuracy touch sensing device 10 having a multi-layer electrode structure as shown in FIG. 1A can utilize the auxiliary signal VT1 to reduce or completely eliminate the effects of warpage or deformation of the elastic dielectric material layer 200. After the capacitive excitation driving circuit 52 of the capacitance detecting circuit 50 applies the touch capacitive sensing signal VT to the selected touch sensing electrode 160, the capacitance reading circuit 54 of the capacitance detecting circuit 50 can read the touch at the detecting point P. The sensing signal Vc1 can accurately determine the touch position.

Please refer to FIG. 1B , which is a schematic diagram of a high-accuracy touch-sensing device 10 having a multi-layer electrode structure according to another embodiment of the present invention. The sensing device 10) is a schematic diagram of the operating conditions for tactile sensing. The embodiment shown in FIG. 1B is substantially the same as that shown in FIG. 1A. In this embodiment, the capacitive excitation driving circuit 52 sends the signal source 520 directly to the non-inverting amplifier 56 (without the driver 522), and the gain of the non-inverting amplifier 56. The value is preferably one to generate an auxiliary signal VT1 that is in phase with the touch capacitive induction excitation signal VT. Since the detection point P is separated from the auxiliary signal VT1 in this example, the detection result is not affected by the auxiliary signal VT1. Similarly, the auxiliary signal VT1 can be utilized to reduce or completely eliminate the effects of warpage or deformation of the dielectric material layer 200. After the capacitive excitation driving circuit 52 of the capacitance detecting circuit 50 applies the touch capacitive sensing signal VT to the selected touch sensing electrode 160 (E14, E24), the capacitance reading circuit 54 of the capacitance detecting circuit 50 can detect Point P reads the tactile sensing signal Vc1 to accurately determine the touch position.

Please refer to FIG. 2A, which is a schematic diagram of a high-accuracy touch-sensing device 10 having a multi-layer electrode structure for a sense of pressure according to another embodiment of the present invention. When the operating condition is measured, the capacitive excitation driving circuit 52 applies the pressure-capacitance sensing excitation signal Vp to the pressure sensing electrode 170 of the third electrode layer 300, and applies the masking signal Vp1 in phase with the pressure-capacitance sensing excitation signal Vp. The non-selected touch sensing electrode 160 (ie, at least a portion of the first sensing electrode of the selected first sensing electrode E14 and at least a portion of the second sensing electrode of the corresponding second sensing electrode E24) is shielded from the finger The capacitance change of the operation improves the pressure sensing accuracy. Furthermore, a corresponding excitation signal Vcount having a predetermined level is applied to the selected touch sensing electrodes 160 (E14, E24) to enhance the pressure sensing sensitivity of the pressure sensing electrode 170. The capacitance reading circuit 54 of the capacitance detecting circuit 50 can read the pressure sensing signal Vc2 from the pressure sensing electrode 170 at the detecting point P, so as to accurately determine whether there is a pressing action and a pressure.

Please refer to FIG. 2B, which is a schematic diagram illustrating a high-accuracy touch sensing device 10 having a multi-layer electrode structure according to another embodiment of the present invention, and the high-accuracy touch sensing device 10 having a multi-layer electrode structure is used for The operating condition of pressure sensing. The high-accuracy touch-sensing device 10 having a multi-layer electrode structure is similar to the embodiment shown in FIG. 2A. However, the capacitance detecting circuit 50 has an inverting amplifier 59 instead of the DC reference signal source 53. In other words, this embodiment The device 10 for integrating touch and pressure sensing generates an alternating signal inverted by the inductive excitation signal Vp from the inverting amplifier 59 as a corresponding excitation signal Vconut; similarly, the second sensing electrode is also enhanced Pressure sensing sensitivity. In addition, the input of the non-inverting amplifier 56 for generating the masking signal Vp1 in the capacitance detecting circuit 50 of this embodiment is not connected to the input point of the capacitor reading circuit 54, for example, can be directly connected to the signal source 520 to avoid reading from the capacitor. Take the influence of the voltage sensing signal Vc2 at the input point of the circuit 54.

Please refer to FIG. 3A, which is a side view of a high-accuracy touch sensing device 10 having a multi-layer electrode structure according to an embodiment of the present invention. This embodiment is substantially similar to the one shown in FIG. 1A. However, in this embodiment, the touch electrode traces 150 are coplanar and one-to-one corresponding to the second sensing electrodes 122 and are electrically connected. The projections are respectively covered by the first sensing electrodes 112. The second sensing electrodes 122 are connected to the corresponding first sensing electrodes 112 through the interlayer connection electrodes (V1 to V9 in the figure) in the insulating layer 130, and are electrically connected to the corresponding first sensing electrodes 112, respectively. This can also electrically connect each touch electrode trace 150 to the corresponding first sensing electrode 112. Similarly, since the touch electrode trace 150 is covered by the first sensing electrode 112 on the projection, the first sensing electrode 112 can effectively shield the charge interference from the finger when the touch sensing device 10 performs pressure sensing. To make pressure sensing more accurate. Please refer to FIG. 3B, which is a side view of a high-accuracy touch-sensing device 10 having a multi-layer electrode structure according to another embodiment of the present invention. The high-accuracy touch-sensing device 10 having a multi-layer electrode structure is shown in FIG. 3A. Similarly, the high-accuracy touch-sensing device 10 having a multi-layer electrode structure further includes a second substrate 400 disposed on a side of the third electrode layer 300 facing away from the dielectric material layer 200. . Referring to FIG. 3C, a side view of a high-accuracy touch sensing device 10 having a multilayer electrode structure according to another embodiment of the present invention, the high-accuracy touch sensing device 10 having a multilayer electrode structure is shown in FIG. 3B. Similarly, the high-accuracy touch-sensing device 10 having a multi-layer electrode structure further includes a glue layer 500 disposed on a side of the third electrode layer 300 facing away from the upper substrate 100.

Please refer to FIG. 4A, which is a side view of a high-accuracy touch sensing device 10 having a multilayer electrode structure in accordance with an embodiment of the present invention. This embodiment is substantially similar to that shown in FIG. 3A. However, in this embodiment, the touch electrode trace 150 is disposed between the first sensing electrode 112 and the second sensing electrode 122; and in the insulating layer 130. Each of the touch electrode traces 150 is electrically connected to a corresponding first sensing electrode 112 via the upper first interlayer connection electrode 132 (V11 to V19 as shown), and passes through the second interlayer below. The connection electrode 134 (V21 to V29 as shown) is electrically connected to a corresponding second sensing electrode 122. The touch electrode traces 150 are respectively covered by the corresponding first sensing electrodes 112 and second sensing electrodes 122 on the projection. Therefore, when the touch sensing device 10 performs pressure sensing, the first sensing electrode 112 and the second sensing electrode 122 can effectively shield the charge interference from the finger, so that the pressure sensing is more accurate. Please refer to FIG. 4B, which is a side view of a high-accuracy touch-sensing device 10 having a multi-layer electrode structure according to another embodiment of the present invention. The high-accuracy touch sensing device 10 having a multi-layer electrode structure is shown in FIG. 4A. Similarly, the high-accuracy touch-sensing device 10 having a multi-layer electrode structure further includes a second substrate 400 disposed on a side of the third electrode layer 300 facing away from the dielectric material layer 200. . Referring to FIG. 4C, a side view of a high-accuracy touch sensing device 10 having a multilayer electrode structure according to another embodiment of the present invention, the high-accuracy touch sensing device 10 having a multilayer electrode structure is shown in FIG. 4B. Similarly, the high-accuracy touch-sensing device 10 having a multi-layer electrode structure further includes a glue layer 500 disposed on a side of the third electrode layer 300 facing away from the upper substrate 100.

5A is a side view of a high-accuracy touch-sensing device 10 having a multi-layer electrode structure according to another embodiment of the present invention, mainly showing the first sensing electrode 112, the second sensing electrode 122, and the insulating layer. A stacked side view of the layer 130 and the touch electrode trace 150. 5B is a top view of a high-accuracy touch-sensing device 10 having a multi-layer electrode structure according to another embodiment of the present invention, mainly showing the first sensing electrodes and the second electrodes of the first electrode layer 110. The second sensing electrodes of the layer 120 are in a one-to-one correspondence and are electrically connected to form a plurality of touch sensing electrodes (such as TE01~08, TE11~18, TE21~28, TE31~38 shown in the figure). The touch electrode traces 150 are electrically connected to the capacitance detecting circuit 50 and the touch sensing electrodes. The high-accuracy touch-sensing device 10 having a multi-layered electrode structure further includes a trace shielding electrode 90 for shielding the touch electrode traces 150 to prevent the touch electrodes from walking. Line 150 is disturbed and affects touch sensitivity.

FIG. 6 is a haptic operation signal distribution diagram of the high-accuracy touch sensing device 10 having a multilayer electrode structure according to another embodiment of the present invention. The high-accuracy touch-sensing device 10 with a multi-layer electrode structure is mainly used to sense the excitation signal VT and the auxiliary signal VT1 in the touch operation. The first sensing electrodes of the first electrode layer 110 and the second sensing electrodes of the second electrode layer 120 are in a one-to-one correspondence and electrically connected to form a plurality of touch sensing electrodes (as shown in the figure). TE01~08, TE11~18, TE21~28, TE31~38).

When the high-accuracy touch sensing device 10 having the multi-layer electrode structure sequentially or randomly applies a touch capacitive sensing excitation signal VT to the selected one of the touch sensing electrodes TE14; the capacitance detecting circuit 50 will also The touch capacitor senses the excitation signal VT to generate an auxiliary signal VT1 that is in phase with the touch capacitive induction excitation signal VT. The auxiliary signal VT1 is applied to the opposite at least one pressure sensing electrode (located on the third electrode layer 300). Since the signal of the same phase as the touch capacitive sensing excitation signal VT is applied to the opposite at least one pressure sensing electrode, no voltage can be generated between the corresponding touch sensing electrode TE14 and the opposite at least one pressure sensing electrode. Poor or almost no voltage difference state, that is, no capacitance is generated or only a small amount of capacitance is generated (does not affect the touch capacitance of the touch sensing result), so as to avoid the corresponding touch sensing selected in the detection. During the touch operation of the electrode TE14, the capacitance of the elastic dielectric material layer 200 is caused by the pressure warpage, and the interference caused by the parallel connection effect between the pressure sensing electrode and the grounding point is also blocked. Similarly, the auxiliary signal VT1 can be simultaneously applied to the touch sensing electrodes around the selected touch sensing electrode TE14 to eliminate the stray capacitance effect between the selected touch sensing electrode TE14 and its surrounding touch sensing electrodes. The power line above the selected touch sensing electrode is concentrated and topped to enhance the sensitivity of the proximity sensing.

FIG. 7 is a diagram showing a pressure detecting operation signal distribution diagram of a high-accuracy touch sensing device 10 having a multilayer electrode structure according to another embodiment of the present invention. The high-precision touch-sensing device 10 having the multi-layer electrode structure mainly displays the pressure-capacitance sensing excitation signal Vp and the masking signal Vp1 during the pressure detecting operation. The first sensing electrodes of the first electrode layer 110 and the second sensing electrodes of the second electrode layer 120 are in a one-to-one correspondence and electrically connected to form a plurality of touch sensing electrodes (as shown in the figure). TE01~08, TE11~18, TE21~28, TE31~38).

When the capacitance sensing circuit 50 applies a pressure-capacitance induction excitation signal Vp for pressure sensing to a corresponding selected pressure sensing electrode (located on the third electrode layer 300), the capacitance detecting circuit 50 processes the pressure capacitor. The excitation signal Vp is induced to generate the in-phase amplified masking signal Vp1, and the masking signal Vp1 is applied to the unselected pressure sensing electrode to shield the capacitance change from the finger operation, thereby improving the pressure sensing accuracy. Furthermore, a corresponding excitation signal Vcount having a predetermined level is applied to the selected touch sensing electrode TE14 to enhance the sensitivity of the pressure sensing sensitivity and the pressing point of the pressure sensing electrode.

It is particularly worth mentioning that, as shown in FIG. 5B, FIG. 6 and FIG. 7 , the corresponding first sensing electrodes 112 and the second sensing electrodes 122 are intentionally formed on the orthographic projection and are adjacent to the adjacent electrodes. The corresponding electrode portions overlap; therefore, the hands or objects that look toward the third electrode layer (below) from the operation side (top) or from the third electrode layer are completely treated by the same The touch sensing electrodes (TE01~08, TE11~18, TE21~28, TE31~38) are completely covered, so they can get the best accuracy when performing pressure detection.

In the above embodiments, the upper substrate is a polymer film or an ultra-thin glass, the upper substrate has a thickness of not more than 500 μm; the upper substrate is a flex-resistant material substrate and the thickness of the upper substrate is not more than 500 μm; The lower substrate is a polymer film or a glass; the elastic dielectric material layer 200 is disposed on one side of the second electrode layer facing the upper substrate, the touch sensing electrodes 160 and the pressure sensing electrodes 170 The elastic dielectric material layer is sandwiched therebetween in a flat configuration, and the elastic dielectric material layer is compressively deformed when subjected to pressure, and returns to the original volume and shape when the pressure is removed; the elastic gel material can be, for example, Not limited to) Polydimethylsiloxane (PDMS) material, Optical Clear Adhesive (OCA). The touch capacitor induction excitation signal VT and the pressure-capacitance induction excitation signal Vp are an alternating signal, such as a sine wave, square wave, triangle wave or trapezoidal wave; the touch capacitance induction excitation signal VT and the pressure capacitance induction excitation signal Vp can also be one Battery. Corresponding to the inductive excitation signal Vcount is a continuous flow reference signal or an alternating signal with the pressure capacitive sensing excitation signal Vp; the capacitance detecting circuit is a self-capacitance detecting circuit; the touch sensing electrodes 160 and the The pressure sensing electrodes are made of a transparent conductive material, such as indium tin oxide or indium zinc oxide; the touch sensing electrodes 160 and the pressure sensing electrodes are made of opaque conductive materials, such as graphite, gold, silver, copper, aluminum. , tin, indium, tungsten, molybdenum or alloy materials as described above.

Please refer to FIG. 8 , which is a schematic diagram of a self-capacitance detecting circuit of one specific example of the present invention. The self-capacitance detecting circuit 50' includes a capacitive excitation driving circuit 52 and a capacitance reading circuit 54 for detecting a capacitance change value of the capacitance reading point P. The capacitor excitation driving circuit 52 includes a signal source 520 and a driver 522 (including a second impedance 522a and a third impedance 522b). The capacitor reading circuit 54 includes a differential amplifier 540, a first impedance 542 and a first capacitor 544 for detecting a change in capacitance on a sensing electrode 60. The sensing electrode 60 has a first stray capacitance 62 attached thereto. And a second stray capacitance 64.

The signal source 520 is electrically connected to the first impedance 542 and the second impedance 522a; the first impedance 542 is electrically connected to the first capacitor 544; the first capacitor 544 is electrically connected to the differential amplifier 540 The first input end 540a; the second impedance 522a is electrically connected to the second input end 540b of the differential amplifier 500; the sensing electrode 60 is connected to the one via the contact of the self-capacitance detecting circuit 50' The second impedance 522a and the second input end 540b of the differential amplifier 540; the first stray capacitance 62 is electrically connected to the pin; the second stray capacitance 64 is electrically connected to the sensing electrode 60.

In the self-capacitance detecting circuit 50' shown in FIG. 8, the sensing electrode 60 senses a touch of a finger or various types of conductors or objects to receive a touch signal; the signal source 520 is a periodic input signal to The third impedance 522b, and the impedance value of the first impedance 542 is equal to the impedance value of the second impedance 522a; the differential amplifier 540 causes the output terminal 540c to output differential amplification according to the input signal and the touch signal. a touch signal, the capacitance of the first capacitor 544 is equal to the capacitance of the first stray capacitance 62 and the second stray capacitance 64 in parallel, when a finger or various types of conductors or objects approach the sensing electrode 60, The capacitance value of the second stray capacitance 64 is changed such that the voltage values of the first input end 540a and the second input end 540b are different. After the differential amplifier 540 is differentially amplified, the output end 540c is outputted after being amplified. The touch signal can measure the change of the output of the differential amplifier 540 to distinguish the change of the trace capacitance generated by the sensing electrode 60, thereby effectively eliminating interference caused by noises such as circuits and power supplies, and measuring the interference. Trace capacitance value change. In addition, for more details of the self-capacitance detecting circuit 50', refer to the self-capacitance detecting circuit technology disclosed in the same applicant's invention I473001 trace impedance change detecting device.

However, the above is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited, that is, the equal changes and modifications made by the scope of the patent application of the present invention should still be covered by the patent of the present invention. The scope of the scope is intended to protect. There may be other various embodiments of the present invention, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit of the present invention, but the corresponding changes and modifications are It is intended to fall within the scope of the appended claims. In summary, when Zhiben's creation has industrial applicability, novelty and progressiveness, and the structure of this creation has not been seen in similar products and public use, it fully complies with the requirements of new patent applications and applies for patent law.

10‧‧‧High-precision touch-sensing device with multi-layer electrode structure

100‧‧‧Upper substrate

100a‧‧‧ first surface

100b‧‧‧ second surface

110‧‧‧First electrode layer

120‧‧‧Second electrode layer

112, E11~E19‧‧‧ first sensing electrode

122, E21~E29‧‧‧second sensing electrode

130‧‧‧Insulation

V1~V9‧‧‧Interlayer connection electrode

132‧‧‧First interlayer connection electrode

134‧‧‧Second interlayer connection electrode

V11~V19‧‧‧ first interlayer connection electrode

V21~V29‧‧‧Second interlayer connection electrode

150‧‧‧Touch electrode trace

W1~W9‧‧‧Touch electrode trace

160‧‧‧Touch sensing electrode

170‧‧‧ Pressure sensing electrode

200‧‧‧Elastic dielectric material layer

300‧‧‧ third electrode layer

400‧‧‧second substrate

500‧‧ ‧ glue layer

50‧‧‧Capacitance detection circuit

50'‧‧‧Self capacitance detection circuit

52‧‧‧Capacitor excitation drive circuit

520‧‧‧Signal source

522‧‧‧ drive

54‧‧‧Capacitor reading circuit

56‧‧‧In-phase amplifier

59‧‧‧Inverting amplifier

Vc1‧‧‧Tactile sensing signal

Vc2‧‧‧pressure sensing signal

VT‧‧‧Touch Capacitance Induction Excitation Signal

VT1‧‧‧Auxiliary signal

Vp‧‧‧Pressure capacitance induction excitation signal

Vp1‧‧‧ shadow signal

Vcount‧‧‧ corresponding incentive signal

TE01~08‧‧‧ touch sensing electrode

TE11~18‧‧‧ touch sensing electrode

TE21~28‧‧‧ touch sensing electrode

TE31~38‧‧‧ touch sensing electrode

90‧‧‧Wiring shield electrode

542‧‧‧First impedance

522a‧‧‧second impedance

522b‧‧‧ third impedance

540‧‧‧Differential Amplifier

544‧‧‧first capacitor

60‧‧‧Induction electrode

62‧‧‧First stray capacitance

64‧‧‧Second stray capacitance

540a, 540b‧‧‧ input

540c‧‧‧output

FIG. 1A is a schematic diagram of a high-accuracy touch sensing device having a multilayer electrode structure according to an embodiment of the present invention. FIG.

FIG. 1B is a schematic diagram of a high-accuracy touch sensing device having a multilayer electrode structure according to another embodiment of the present invention.

2A is a schematic diagram of a high-accuracy touch sensing device having a multilayer electrode structure in accordance with another embodiment of the present invention.

2B is a schematic diagram of a high-accuracy touch sensing device having a multilayer electrode structure in accordance with another embodiment of the present invention.

3A is a side elevational view of a high precision touch sensing device having a multilayer electrode structure in accordance with an embodiment of the present invention.

3B is a side elevational view of a high precision touch sensing device having a multilayer electrode structure in accordance with another embodiment of the present invention.

3C is a side elevational view of a high precision touch sensing device having a multilayer electrode structure in accordance with another embodiment of the present invention.

4A is a side elevational view of a high precision touch sensing device having a multilayer electrode structure in accordance with an embodiment of the present invention.

4B is a side elevational view of a high precision touch sensing device having a multilayer electrode structure in accordance with another embodiment of the present invention.

4C is a side elevational view of a high precision touch sensing device having a multilayer electrode structure in accordance with another embodiment of the present invention.

5A is a side elevational view of a high precision touch sensing device having a multilayer electrode structure in accordance with another embodiment of the present invention.

5B is a top plan view of a high-accuracy touch sensing device having a multilayer electrode structure in accordance with another embodiment of the present invention.

FIG. 6 is a haptic operation signal distribution diagram of a high-accuracy touch-sensing device having a multilayer electrode structure according to another embodiment of the present invention.

FIG. 7 is a diagram showing a pressure detecting operation signal distribution diagram of a high-accuracy touch sensing device having a multilayer electrode structure according to another embodiment of the present invention.

FIG. 8 is a schematic diagram of a self-capacitance detecting circuit of one specific example of the present invention.

10‧‧‧High-precision touch-sensing device with multi-layer electrode structure

100‧‧‧Upper substrate

100a‧‧‧ first surface

100b‧‧‧ second surface

110‧‧‧First electrode layer

120‧‧‧Second electrode layer

112, E11~E19‧‧‧ first sensing electrode

122, E21~E29‧‧‧second sensing electrode

130‧‧‧Insulation

V1~V9‧‧‧Interlayer connection electrode

150‧‧‧Touch electrode trace

160‧‧‧Touch sensing electrode

170‧‧‧ Pressure sensing electrode

W1~W9‧‧‧Touch electrode trace

200‧‧‧Elastic dielectric material layer

300‧‧‧ third electrode layer

50‧‧‧Capacitance detection circuit

52‧‧‧Capacitor excitation drive circuit

520‧‧‧Signal source

522‧‧‧ drive

54‧‧‧Capacitor reading circuit

56‧‧‧In-phase amplifier

Claims (16)

A high-accuracy touch-sensing device with a multi-layer electrode structure, comprising: an upper substrate, the upper substrate comprising a first surface and a second surface opposite to the first surface; a first electrode layer, the first An electrode layer is disposed on one surface of the upper substrate, the first electrode layer includes a plurality of first sensing electrodes; a second electrode layer, the second electrode layer is disposed relative to the first electrode layer, and the phase The first sensing electrode is further away from the upper substrate, and includes a plurality of second sensing electrodes. The second sensing electrodes are in one-to-one correspondence with the first sensing electrodes and are corresponding to the corresponding first sensing electrodes. The two electrical electrodes are connected to form a plurality of touch sensing electrodes; the plurality of touch electrode wires are respectively connected to one touch sensing electrode and electrically connected and electrically insulated from the other touch sensing electrodes; a layer of elastic dielectric material disposed on a side of the second electrode layer facing away from the upper substrate, and the layer of elastic dielectric material is compressively deformed when subjected to pressure, and when pressure is removed Some recovery volume shape; and a third electrode layer, the third electrode layer disposed on the lines of the elastic layer of dielectric material on the back side of the substrate, the pressure sensor comprising at least one electrode. The high-accuracy touch-sensing device with a multi-layer electrode structure as described in claim 1, wherein the plurality of touch electrode traces are covered by the first sensing electrodes or the second sensing electrodes. The high-accuracy touch-sensing device with a multi-layer electrode structure as described in claim 1, wherein the plurality of touch electrode traces are shared by the first sensing electrodes and the second sensing electrodes. The high-accuracy touch-sensing device with a multi-layer electrode structure as described in claim 1, further comprising: a capacitance detecting circuit for sequentially or randomly applying a touch capacitive sensing excitation signal to the selected touch Controlling the sensing electrode, and inputting a touch sensing signal from the touch sensing electrode for performing a touch detection operation, and applying an auxiliary signal in phase with the touch capacitive sensing excitation signal to the opposite at least one pressure sensing electrode The capacitance detecting circuit applies a pressure capacitive sensing excitation signal to the at least one pressure sensing electrode and inputs a pressure sensing signal from the pressure sensing electrode for pressure detecting operation; A pressure corresponding excitation signal is randomly applied to the selected touch sensing electrode. A high-accuracy touch-sensing device having a multi-layer electrode structure according to the first aspect of the invention, wherein the upper substrate is a polymer film or an ultra-thin glass having a thickness of not more than 500 μm. The high-precision touch-sensing device having a multi-layer electrode structure according to the first aspect of the invention, wherein the upper substrate is a flex-resistant material substrate and has a thickness of not more than 500 μm. The high-accuracy touch-sensing device with a multi-layer electrode structure as described in claim 1 further includes a lower substrate, which is a polymer film or a glass. The high-accuracy touch-sensing device with a multi-layer electrode structure according to claim 1, further comprising a glue layer disposed on a side of the third electrode layer facing away from the upper substrate. The high-accuracy touch-sensing device with a multi-layer electrode structure as described in claim 1, wherein the touch-sensing electrodes and the pressure-sensing electrodes are made of a transparent conductive material. The high-accuracy touch-sensing device with a multi-layer electrode structure as described in claim 1, wherein the touch-sensing electrodes and the pressure-sensing electrodes are made of an opaque conductive material. The high-accuracy touch-sensing device with a multi-layer electrode structure as described in claim 4, the capacitance detecting circuit is a self-capacitance detecting circuit. The high-precision touch-sensing device with a multi-layer electrode structure as described in claim 4, the capacitance detecting circuit is more reflective with one of the phase sensing signals of the touch capacitor during the touch detection operation. A signal is applied to the touch sensing electrodes surrounding the selected touch sensing electrode. The high-precision touch-sensing device with a multi-layer electrode structure as described in claim 4, the capacitance detecting circuit applies a masking signal in phase with the pressure-capacitance sensing excitation signal during the pressure detecting operation. For these non-selected touch sensing electrodes. The high-precision touch-sensing device with a multi-layer electrode structure as described in claim 4, wherein the touch-capacitance sensing excitation signal and the pressure-capacitance sensing excitation signal are an alternating signal, and the touch capacitance sensing excitation signal It can also be a current source. The high-precision touch-sensing device with a multi-layer electrode structure according to claim 14, wherein the pressure corresponds to the excitation signal, and the alternating reference signal or the phase of the anti-phase of the pressure-capacitance induced excitation signal is an alternating signal. The high-accuracy touch-sensing device with a multi-layer electrode structure as described in claim 15 is a zero-potential signal.