CN106325578B - Pressure sensing touch panel - Google Patents
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- CN106325578B CN106325578B CN201510404475.1A CN201510404475A CN106325578B CN 106325578 B CN106325578 B CN 106325578B CN 201510404475 A CN201510404475 A CN 201510404475A CN 106325578 B CN106325578 B CN 106325578B
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Abstract
The invention relates to a pressure-sensing touch panel, which comprises a substrate, wherein an electrode layer is arranged on one surface of the substrate, the electrode layer comprises a plurality of first-direction touch sensing electrode strings and a plurality of second-direction touch sensing electrode strings, the first-direction touch sensing electrode strings and the second-direction touch sensing electrode strings are insulated from each other and used for detecting touch positions, the first-direction touch sensing electrode strings comprise a plurality of first-direction sensing units, the second-direction touch sensing electrode strings comprise a plurality of second-direction sensing units, a linear hollow structure is arranged in the first-direction sensing unit of at least one first-direction touch sensing electrode string and/or the second-direction touch sensing electrode string of at least one second-direction touch sensing electrode string, and the at least one first-direction touch sensing electrode string and/or one second-direction touch sensing electrode string has a pressure detection function.
Description
[ field of technology ]
The present disclosure relates to touch panels, and particularly to a pressure-sensitive touch panel with a linear hollow design.
[ background Art ]
Most of the touch panels on the market at present only have touch position detection, and along with the diversification of functions of electronic products, more and more application scenes need to detect the stress of touch points so as to finish more product functions, and improve the experience of users.
[ invention ]
In order to solve the problems that the thickness of the touch panel is increased and the material cost is increased when the pressure sensing functional layer is added to the touch panel in the prior art, the invention provides the pressure sensing touch panel which can better solve the problems.
The invention provides a pressure-sensing touch panel, which comprises a substrate, wherein an electrode layer is arranged on one surface of the substrate, and the electrode layer comprises a plurality of first-direction touch sensing electrode strings and a plurality of second-direction touch sensing electrode strings; the first direction touch sensing electrode string and the second direction touch sensing electrode string are insulated from each other and used for detecting touch positions; the first direction touch sensing electrode string comprises a plurality of first direction sensing units, and the second direction touch sensing electrode string comprises a plurality of second direction sensing units; at least one first direction touch sensing electrode string and/or at least one second direction touch sensing electrode string is/are provided with a linear hollow structure in a first direction sensing unit and/or a second direction sensing unit, and the at least one first direction touch sensing electrode string and/or the at least one second direction touch sensing electrode string has a pressure detection function.
Preferably, the pressure sensing touch panel further includes a circuit system, the circuit system includes a plurality of first wires, second wires, and a wheatstone bridge circuit, each first direction touch sensing electrode set and/or second direction touch sensing electrode set is connected to the wheatstone bridge circuit through a first wire and a second wire, the first direction touch sensing electrode set and/or the second direction touch sensing electrode set form one element of the wheatstone bridge circuit, and a resistance change amount generated after the touch is detected by the wheatstone bridge circuit.
Preferably, the touch position detection and the pressure detection of the first direction sensing unit and/or the second direction sensing unit are performed in a time sequence.
Preferably, the pressure sensing touch panel further includes a protective cover plate, the protective cover plate includes a first surface and a second surface, the first surface and the second surface are disposed opposite to each other, and the first surface is provided for a user to apply a touch action.
Preferably, the hollow structure is in a sine wave line shape, a sawtooth line shape, a spiral line shape, a square wave line shape or a cross staggered line shape.
Preferably, the area of the linear hollow structure of any one of the first direction sensing unit and/or the second direction sensing unit is 10% -50% of the area of the corresponding first direction sensing unit or second direction sensing unit.
Preferably, the pressure-sensitive touch panel further includes an optical layer disposed on the electrode layer; the optical layer comprises a low refractive index layer with a refractive index of 1.1-1.6; and/or a high refractive index layer having a refractive index of 1.8 to 2.7.
Preferably, the electrode layer is made of any one or combination of ITO, silver-doped ITO, nano silver wires, graphene, nano metal grids and carbon nanotubes.
Preferably, an insulating block is disposed at the intersection of the first direction touch sensing electrode string and the second direction touch sensing electrode string on one surface of the substrate, and the insulating block is located between the first direction touch sensing electrode string and the second direction touch sensing electrode string.
The invention also provides a pressure-sensing touch panel, which comprises a protective cover plate, wherein the protective cover plate comprises a first surface and a second surface, the first surface and the second surface are oppositely arranged, the first surface is used for a user to apply a touch pressure action, a first electrode layer, a second electrode layer and a substrate are arranged between the first electrode layer and the second electrode layer, the first electrode layer is arranged between the protective cover plate and the substrate, the first electrode layer comprises a plurality of first-direction touch sensing electrode strings, the second electrode layer comprises a plurality of second-direction touch sensing electrode strings, the first-direction touch sensing electrode strings and the second-direction touch sensing electrode strings are mutually insulated and used for touch position detection, the first-direction touch sensing electrode strings comprise a plurality of first-direction sensing units, the second-direction touch sensing electrode strings comprise a plurality of second-direction sensing units, a linear hollow structure is arranged in the first-direction sensing units of at least one first-direction touch sensing electrode string, the at least one first-direction touch sensing electrode string has a pressure detection function or at least one first-direction touch sensing electrode string has a first-direction touch sensing electrode string and at least one first-direction touch sensing electrode string, and the second-direction touch sensing electrode string has a linear-direction sensing function or at least one first-direction touch sensing electrode string is arranged in the first-direction sensing units.
[ description of the drawings ]
Fig. 1 is a schematic diagram of an explosion structure of a first embodiment of a pressure-sensitive touch panel according to the present invention.
Fig. 2 is a schematic front view of an electrode layer of a first embodiment of a pressure-sensitive touch panel according to the present invention.
Fig. 3 is a schematic diagram of a wheatstone bridge circuit in a first embodiment of the pressure sensing touch panel of the present invention.
Fig. 4 is a time-sharing timing diagram of a detection circuit signal in a first embodiment of the pressure-sensing touch panel according to the present invention.
Fig. 5 is an enlarged cross-sectional view of the first embodiment of the pressure-sensitive touch panel of the present invention at a shown in fig. 2.
Fig. 6 to 8 are schematic views illustrating other variations of the electrode layer in the first embodiment of the pressure-sensitive touch panel according to the present invention.
Fig. 9 is a schematic front view of an electrode layer in a second embodiment of the pressure-sensitive touch panel of the present invention.
Fig. 10 is an enlarged cross-sectional view at B in fig. 9.
Fig. 11 is a schematic front view of an electrode layer of a third embodiment of a pressure-sensitive touch panel according to the present invention.
Fig. 12 is a schematic diagram of an explosion structure of a pressure-sensitive touch panel according to a fourth embodiment of the present invention.
Fig. 13 is a schematic front view of an electrode layer of a fourth embodiment of the pressure-sensitive touch panel of the present invention.
Fig. 14 is a schematic front view of another electrode layer of the pressure-sensitive touch panel according to the fourth embodiment of the invention.
[ detailed description ] of the invention
For the purpose of making the technical solution and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and examples of implementation. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, a pressure-sensitive touch panel 1 according to a first embodiment of the present invention includes a protective cover 11, an electrode layer 13, an optical layer 14 and a substrate 15, where the protective cover 11 has a first surface and a second surface, and the first surface and the second surface are opposite to each other, the first surface is provided for a user to apply a pressing action, the electrode layer 13 is formed on the substrate 15, the optical layer 14 is located between the protective cover 11 and the electrode layer 13, the protective cover 11 may be made of a hard plate such as a hard plastic, a reinforced glass, or a sapphire glass, and when the user applies a pressing action to the protective cover 11, the force is transferred to the electrode layer 13 under the protective cover 11, the electrode layer 13 senses the position of the pressing action and the amount of the pressing action, and different amounts of the pressing actions may define different functional operations. The substrate 15 may be a rigid substrate such as glass, tempered glass, sapphire glass, or the like; the substrate 15 of the pressure-sensitive touch panel (not shown) of the present invention may also include a first surface and a second surface, the first surface is provided with a pressing action by a user, the second surface is provided with an electrode layer 13, the electrode layer 13 has a function of detecting a touch position and detecting a pressure, the substrate 15 may be made of hard plastic, reinforced glass, sapphire glass, or the like, the substrate 15 in this variant embodiment has a function of protecting the cover plate 11 without adding a protective cover plate 11, and the pressure-sensitive touch panel (not shown) in this variant embodiment may further include an optical layer 14, and the optical layer 14 is disposed between the second surface 15 and the electrode layer 13.
Referring to fig. 2, the electrode layer 13 in the first embodiment of the pressure-sensitive touch panel 1 of the present invention includes a plurality of first direction touch sensing electrode serials 131 and a plurality of second direction touch sensing electrode serials 133, and a plurality of first direction sensing units 1311 and a plurality of first direction connecting portions 1313 are alternately disposed in the first direction touch sensing electrode serials 131. Similarly, a plurality of second direction sensing units 1331 and a plurality of second direction connecting portions 1333 are alternately disposed in the second direction touch sensing electrode serials 133, and each second direction touch sensing electrode serials 133 includes a first end portion 1337 and a second end portion 1338 opposite to the first end portion. The plurality of first direction touch sensing electrode serials 131 are arranged at uniform intervals and in parallel, and the plurality of second direction touch sensing electrode serials 133 are also arranged at uniform intervals and in parallel. Each second direction sensing unit 1331 has a sine wave linear second direction electrode hollow 1335, however, it is also possible to provide the second direction electrode hollow 1335 in the second direction sensing units 1331 of the plurality of second direction touch sensing electrode strings 133, for example, select 4 second direction touch sensing electrode strings 133 with equal intervals, and provide the second direction electrode hollow 1335 in the second direction sensing units 1331.
The pressure-sensitive touch panel 1 further comprises a circuit system 19, wherein the circuit system 19 comprises electrode connection wires 191, an FPC (Flexible Printed Circuit board, flexible printed circuit) 193, and a pressure-sensing chip 195, and the pressure-sensing chip 195 comprises a Wheatstone bridge circuit 1951 and other module circuits (not shown). The electrode connection lines 191 are divided into first conductive lines 1911 and second conductive lines 1913, one end of each first conductive line 1911 is connected to the FPC193, the other end is connected to the first end 1337 of the second direction touch sensing electrode string 133, and similarly, one end of each second conductive line 1913 is connected to the FPC193, and the other end is connected to the second end 1338 of the second direction touch sensing electrode string 133. The first direction touch sensing electrode string 131 is only used for detecting a touch position, and uses the first conductive wire 1911 and the second conductive wire 1913, and if one of the first conductive wire 1911 or the second conductive wire 1913 is broken, the detection of the touch position is not affected.
The pressure touch panel 1 of the present invention mainly performs the function of pressure sensing according to the situation that the second direction touch sensing electrode string 133 deforms to generate a resistance value change after external pressure is applied, and has the second direction electrode hollow 1335, so that the second direction touch sensing electrode string 133 can deform greatly, and the function of detecting the position of the second direction touch sensing electrode string 133 can be considered. The second direction touch sensing electrode string 133 is connected to the FPC193 through the electrode connection line 191, and the change of the resistance value of the second direction touch sensing electrode string 133 is directly detected through the FPC193 by the wheatstone bridge circuit 1951 and is processed by other module circuits of the pressure sensing chip 195, so that the function of sensing pressure is realized. In general, the deformation and the change of the resistance of the second direction touch sensing electrode string 133 have the following formula:
gf= (Δr/R)/(Δl/L), GF being a strain gauge factor, R being an initial resistance value of the second direction touch sensing electrode string 133, L being a total length of the second direction touch sensing electrode string 133, Δr being a resistance value variation of the second direction touch sensing electrode string 133, Δl being a variation of the length of the second direction touch sensing electrode string 133, the larger the length variation Δl of the second direction touch sensing electrode string 133 being, the larger the values of GF, R and L being, the resistance variation Δr of the second direction touch sensing electrode string 133 must be detected better for obtaining a preferable sensing effect.
Referring to fig. 3, in the first embodiment of the pressure-sensing touch panel 1 of the present invention, the wheatstone bridge circuit 1951 can detect the change of the resistance value of the second direction touch sensing electrode string 133, so as to perform subsequent signal processing, where the wheatstone bridge circuit 1951 is composed of auxiliary resistors Ra19511, rb19515, rco19513 and the second direction touch sensing electrode string 133, and when the second direction touch sensing electrode string 133 generates the change of the resistance value, the wheatstone bridge circuit 1951 generates a corresponding electrical signal change, where Δr is the resistance of the second direction touch sensing electrode string 133, and after the wheatstone bridge circuit 1951 detects the change of the resistance value of the second direction touch sensing electrode string 133, signal amplification is performed by other module circuits of the pressure sensing chip 195.
Fig. 4 is a timing chart of the electrical signal scanning performed by the circuit system 19, where the touch position is detected in a period of t1-t2, corresponding to a touch detection voltage, and after the touch position electrical signal is scanned, the touch position is detected in a period of t3-t4, and the touch position is detected in a closed state, similarly, the touch position is detected in a period of t5-t6, and the touch position is detected in a period of t7-t8, and the pressure is detected in a period of t7-t 8.
The function of the pressure sensing touch panel 1 for detecting the touch position is to determine the position of the touch point by detecting mutual capacitance change signals of the corresponding positions of the first direction touch sensing electrode string 131 and the second direction touch sensing electrode string 133 through the system, after the system detects the position of the touch point, the touch detection function is closed, and the second direction touch sensing electrode string 133 is also utilized to detect the pressure in different time periods, wherein the pressure is mainly detected by detecting the change of the resistance value caused by deformation of the second direction touch sensing electrode string 133 due to the stress, and the dual functions of touch position detection and pressure detection can be effectively achieved by detecting the setting of different signals in different time periods, so that the interference between signals is avoided.
Referring to fig. 5, by performing a linear hollowed design in the second direction sensing unit 1331, the second direction electrode hollowed 1335 makes the corresponding second direction sensing unit 1331 be divided into two parts, the ends of the upper half 13311 of the second direction sensing unit and the lower half 13313 of the second direction sensing unit are connected with each other and are connected in parallel, when the system performs pressure detection and the touch panel is stressed, the corresponding part of the second direction touch sensing electrode string 133 is easier to deform, the variation of resistance is correspondingly increased, and accurate pressure detection is facilitated.
The hollowed area of the second direction electrode hollowed 1315 is 10-50% of the area of the corresponding second direction sensing unit 1331, when the hollowed area is too large, the mutual capacitance between the second direction touch sensing electrode string 133 and the first direction touch sensing electrode string 131 is reduced, so that the touch position detection of the touch panel is not facilitated, and when the hollowed area is too small, the shape of the second direction touch sensing electrode string 133 formed after hollowed is not easy to deform after being pressed.
The first direction touch sensing electrode serials 131 and the second direction touch sensing electrode serials 133 may be made of ITO (indium tin oxide), silver doped ITO, nano silver wires, graphene, nano metal mesh, carbon nanotubes. As ITO has negative temperature coefficient of resistance (temperature rise and resistivity reduction), the temperature coefficient of resistance of ITO is-650 ppm/DEG C measured at room temperature, ag and most metals have large positive temperature coefficient of resistance, 3800 ppm/DEG C at room temperature, when the doping amount of Ag is 25at%, the optimal piezoresistive performance at room temperature can be obtained, and the temperature coefficient of resistance is 130 ppm/DEG C at 300-600 ℃ and is about 1/5 of undoped temperature, so that the noise influence of temperature on ITO resistance change can be effectively solved by adopting silver-doped ITO.
Since the second direction touch sensing electrode string 133 is hollowed out in a linear manner, the etching lines are more and more complicated, and the visual effect is easily affected, the problem can be effectively solved by arranging the optical layer 14 between the protective cover plate 11 and the electrode layer 13 in the pressure sensing touch panel 1, and the optical layer 14 is made of a single layer of low refractive index material, or a layer of high refractive index material and a layer of low refractive index material.
The low refractive index is less than 1.6, preferably 1.1 to 1.6, and the preferred refractive index is 1.1,1.25,1.32,1.38,1.46,1.50,1.52. The material of the low refractive index optical layer 14 may be organic or inorganic, or an organic-inorganic hybrid coating. Such as silicon oxide, chlorofluoride, magnesium fluoride, silica, lithium fluoride, sodium fluoride, magnesium oxide, silicate, polyurethane, PMMA, PVA, PVP, silicone, fluoropolymer, acrylic resin, a mixture of acrylic resin and silica nanoparticles, and an adhesive.
The high refractive index is a refractive index of more than 1.8, preferably 1.8 to 2.7. The preferred refractive index is 1.8,1.85,2.0,2.2,2.4,2.7. In this case, the material of the high refractive index optical layer 14 may be an organic or inorganic material, or an organic-inorganic hybrid coating, for example: tantalum oxide, titanium oxide, niobium oxide, lead oxide, zinc sulfide, zirconium oxide, polyimide, zrO2, pb5O11, ta2O5, niobium pentoxide, titanium dioxide, silica gel, acrylic resin and titanium dioxide nanoparticle mixtures.
Referring to fig. 6 to 8, the hollow shape of the second direction sensing unit 1331 in the pressure sensing touch panel 1 according to the first embodiment of the present invention may be a zigzag hollow, a spiral hollow or a cross staggered hollow, and may be a square wave hollow (not shown).
Referring to fig. 9, in the second embodiment of the pressure-sensing touch panel 2 of the present invention, the first direction sensing units 2311 of the first direction touch sensing electrode string 231 are also linearly hollowed out to form a plurality of first direction electrode hollowed-out 2315, and the second direction electrode hollowed-out 2315 and the first direction electrode hollowed-out 2335 have the same hollowed-out shape and are fixed in relative positions, so that the greater the change of the resistance is, the more advantageous the detection of the system is when the system performs the pressure scanning detection by the hollowed-out design of the first direction touch sensing electrode string 231 and the second direction touch sensing electrode string 233. Of course, compared to the pressure-sensing touch panel 1 of the first embodiment, a linear hollow structure may be added to only the first direction sensing units 231 of the plurality of first direction touch sensing electrode strings 231, for example, 4 equally spaced lines of the first direction touch sensing electrode strings 231 may be selected, and the linear first direction electrode hollow 2315 may be disposed in the first direction sensing units 2311.
The first direction touch sensing electrode string 231 and the second direction touch sensing electrode string 233 have both touch position detection and pressure detection functions, and only the conventional first direction touch sensing electrode string 231, the second direction touch sensing electrode string 233 and the electrode connecting wire 291 are required to be correspondingly changed, so that an additional pressure sensing electrode layer is prevented from being added, the cost is saved, and the concept of lightening and thinning products is met.
Referring to fig. 10, since the first direction touch sensing electrode serials 231 and the second direction touch sensing electrode serials 233 are located on the same electrode layer 23, the intersecting portions need insulating blocks 235 to be electrically separated, so as to avoid signal interference. In fig. 9, the second direction connection portion 2333 and the first direction connection portion 2313 are separated by the insulating block 235, which can effectively prevent the two direction electrodes from being electrically connected to each other, so that the touch position and the pressure cannot be detected.
Referring to fig. 11, in a third embodiment of the pressure-sensing touch panel 3 of the present invention, the electrode layer 33 includes a plurality of first-direction touch sensing electrode strings 331, each of the first-direction touch sensing electrode strings 331 includes a first touch sensing electrode 3311 and a second touch sensing electrode 3313, the first touch sensing electrode 3311 includes a plurality of first touch sensing electrode protrusions 33111, the second touch sensing electrode 3313 also includes a plurality of second touch sensing electrode protrusions 33131, and the second electrode cavities 33133 are formed by performing a hollow processing in the second touch sensing electrode 3313, the area of the second electrode cavities 33133 is 10-50% of the area of the corresponding second touch sensing electrode 3313, and the first touch sensing electrode 3311 and the second touch sensing electrode 3313 are mutually complementary and do not contact each other.
Referring to fig. 12, the pressure-sensitive touch panel 4 of the fourth embodiment of the invention includes a protective cover 41, a first electrode layer 421, a first substrate 42, a second electrode layer 431 and a second substrate 43, wherein the first electrode layer 421 is formed on the first substrate 42, and the second electrode layer 431 is formed on the second substrate 43. As a modification of the fourth embodiment, the first electrode layer 421 and the second electrode layer 431 are formed on the upper and lower surfaces of the first substrate 42, respectively, without providing the second substrate 43.
Referring to fig. 13, in the pressure-sensitive touch panel 4 of the fourth embodiment of the present invention, the first electrode layer 421 includes a plurality of first direction touch sensing electrode strings 4211, the first direction touch sensing electrode strings 4211 include a plurality of first direction sensing units 42111, the first direction connecting portion 42115 and the first direction electrode hollow 42113, and the first direction electrode hollow 42113 is curved and formed in the first direction sensing unit 42111.
Referring to fig. 14, in the pressure-sensitive touch panel 4 of the fourth embodiment of the present invention, the second electrode layer 431 includes a plurality of second direction touch sensing electrode strings 4311, the second direction touch sensing electrode strings 4311 include a plurality of second direction sensing units 43111, the second direction connecting portion 43115 and the second direction electrode hollow 43113, and the second direction electrode hollow 43113 is curved and formed in the second direction sensing unit 43111.
Compared to the plurality of first-direction touch sensing electrode serials 4211 in the first electrode layer 421, the plurality of second-direction touch sensing electrode serials 4311 in the second electrode layer 431 also have the second-direction electrode hollows 43113, when the system performs time-division scanning of the electric signal, the touch position detecting function is turned off to detect the pressure, and at this time, the corresponding positions of the first-direction touch sensing electrode serials 4311 and the second-direction touch sensing electrode serials 4211 can be scanned simultaneously, and due to the scanning detection on both surfaces, the signal is stronger than the signal obtained by scanning only the first-direction touch sensing electrode serials 4211 in the first electrode layer 421, and because the second electrode layer 431 is located at a position far from the protective cover plate 41, the change amount of the resistance value that can be brought by the second electrode layer 431 is relatively small when the user applies force, and the curve hollows on the second electrode layer 431 can increase the additional cost, so that the linear electrode serials 4311 in the second-direction touch sensing electrode serials 431 can be selected not to be processed in the actual production process. Of course, it is also possible to select only a plurality of equidistant electrode strings 4211 for linear hollowed-out processing, which has a pressure detection function, such as selecting four or ten electrode strings, and of course, it is also possible to select only the same number of equidistant electrode strings 4211 and 4311 for linear hollowed-out processing, which has a pressure detection function, such as selecting four or ten electrode strings.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, but any modifications, equivalents, improvements, etc. within the principles of the present invention should be included in the scope of the present invention.
Claims (9)
1. A pressure-sensitive touch panel, comprising:
the touch sensing device comprises a substrate, a first electrode layer, a second electrode layer and a first electrode layer, wherein an electrode layer is arranged on one surface of the substrate and comprises a plurality of first direction touch sensing electrode strings and a plurality of second direction touch sensing electrode strings;
the first direction touch sensing electrode string and the second direction touch sensing electrode string are insulated from each other and used for detecting touch positions;
the first direction touch sensing electrode string comprises a plurality of first direction sensing units, and the second direction touch sensing electrode string comprises a plurality of second direction sensing units;
a linear hollow structure is arranged in a first direction sensing unit of at least one first direction touch sensing electrode string and/or a second direction sensing unit of at least one second direction touch sensing electrode string, and the at least one first direction touch sensing electrode string and/or the at least one second direction touch sensing electrode string have a pressure detection function;
the pressure sensing touch panel further comprises a circuit system, the circuit system comprises a plurality of first wires, second wires and a Wheatstone bridge circuit, each first-direction touch sensing electrode string and/or each second-direction touch sensing electrode string are connected to the Wheatstone bridge circuit in a conducting manner through the first wires and the second wires, the first-direction touch sensing electrode strings and/or the second-direction touch sensing electrode strings form one element of the Wheatstone bridge circuit, and the resistance change generated after the touch sensing electrode strings and/or the second-direction touch sensing electrode strings are detected through the Wheatstone bridge circuit.
2. The pressure-sensitive touch panel of claim 1, wherein: the touch position detection and the pressure detection of the first direction sensing unit and/or the second direction sensing unit are performed in a time sequence.
3. The pressure-sensitive touch panel of claim 1, wherein: the protection cover plate comprises a first surface and a second surface, the first surface and the second surface are oppositely arranged, and the first surface is used for a user to apply a touch action.
4. The pressure-sensitive touch panel of claim 1, wherein: the hollow structure is in a sine wave line shape, a sawtooth line shape, a spiral line shape, a square wave line shape or a cross staggered line shape.
5. The pressure-sensitive touch panel of claim 1, wherein: the area of the linear hollow structure of any one of the first direction sensing units and/or the second direction sensing units is 10% -50% of the area of the corresponding first direction sensing unit or second direction sensing unit respectively.
6. The pressure-sensitive touch panel of claim 1, wherein: the optical layer is arranged on the electrode layer; the optical layer comprises a low refractive index layer with a refractive index of 1.1-1.6; and/or a high refractive index layer having a refractive index of 1.8 to 2.7.
7. The pressure-sensitive touch panel of claim 1, wherein: the electrode layer is made of any one or combination of IT O, silver-doped IT O, nano silver wires, graphene, nano metal grids and carbon nano tubes.
8. The pressure-sensitive touch panel according to any one of claims 1-7, wherein: an insulating block is arranged at the intersection of the first direction touch sensing electrode string and the second direction touch sensing electrode string on one surface of the substrate, and the insulating block is positioned between the first direction touch sensing electrode string and the second direction touch sensing electrode string.
9. A pressure-sensitive touch panel, comprising:
the protective cover plate comprises a first surface and a second surface, the first surface and the second surface are oppositely arranged, and the first surface is used for a user to apply a touch action;
a first electrode layer and a second electrode layer;
and a substrate between the first electrode layer and the second electrode layer; the first electrode layer is positioned between the protective cover plate and the base plate;
wherein the first electrode layer comprises a plurality of first-direction touch sensing electrode strings;
the second electrode layer comprises a plurality of second-direction touch sensing electrode strings;
the first direction touch sensing electrode string and the second direction touch sensing electrode string are insulated from each other and used for detecting touch positions;
the first direction touch sensing electrode string comprises a plurality of first direction sensing units, and the second direction touch sensing electrode string comprises a plurality of second direction sensing units;
at least one first direction touch sensing electrode string is internally provided with a linear hollow structure, and the at least one first direction touch sensing electrode string has a pressure detection function; or at least one first direction sensing unit of the first direction touch sensing electrode string and at least one second direction sensing unit of the second direction touch sensing electrode string are respectively provided with a linear hollow structure, and the at least one first direction touch sensing electrode string and the at least one second direction touch sensing electrode string have a pressure detection function.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510404475.1A CN106325578B (en) | 2015-07-10 | 2015-07-10 | Pressure sensing touch panel |
| TW105206261U TWM526124U (en) | 2015-07-10 | 2016-05-02 | Pressure sensing touch panel |
| TW105113662A TWI584176B (en) | 2015-07-10 | 2016-05-02 | Pressure sensing touch panel |
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| CN201510404475.1A CN106325578B (en) | 2015-07-10 | 2015-07-10 | Pressure sensing touch panel |
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| CN106325578A CN106325578A (en) | 2017-01-11 |
| CN106325578B true CN106325578B (en) | 2023-07-25 |
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| CN106325578B (en) * | 2015-07-10 | 2023-07-25 | 宸鸿科技(厦门)有限公司 | Pressure sensing touch panel |
| CN106354328B (en) * | 2016-09-14 | 2023-11-14 | 宸鸿科技(厦门)有限公司 | Pressure sensing module and pressure sensing touch control system |
| US20190384458A1 (en) * | 2017-02-16 | 2019-12-19 | Huawei Technologies Co., Ltd. | Touchscreen and Touch Display Apparatus |
| CN107393497A (en) * | 2017-08-30 | 2017-11-24 | 上海天马微电子有限公司 | Display panel and display device |
| CN107797706B (en) * | 2017-11-03 | 2020-12-01 | 厦门天马微电子有限公司 | Pressure induction sensor, display panel and device |
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| KR102521058B1 (en) * | 2018-05-18 | 2023-04-12 | 삼성디스플레이 주식회사 | Touch sensor and display device |
| CN110045873A (en) * | 2019-04-26 | 2019-07-23 | 太原理工大学 | The compound pressure sensitivity touch screen of capacitance resistance |
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| CN111309176A (en) * | 2020-01-19 | 2020-06-19 | 无锡变格新材料科技有限公司 | Touch panel and preparation method thereof |
| CN111240520A (en) * | 2020-01-19 | 2020-06-05 | 无锡变格新材料科技有限公司 | Touch panel and preparation method thereof |
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Also Published As
| Publication number | Publication date |
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| TWI584176B (en) | 2017-05-21 |
| CN106325578A (en) | 2017-01-11 |
| TW201702835A (en) | 2017-01-16 |
| TWM526124U (en) | 2016-07-21 |
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