WO2020172817A1 - Capteur tactile étirable et procédé de commande associé - Google Patents

Capteur tactile étirable et procédé de commande associé Download PDF

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Publication number
WO2020172817A1
WO2020172817A1 PCT/CN2019/076317 CN2019076317W WO2020172817A1 WO 2020172817 A1 WO2020172817 A1 WO 2020172817A1 CN 2019076317 W CN2019076317 W CN 2019076317W WO 2020172817 A1 WO2020172817 A1 WO 2020172817A1
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WIPO (PCT)
Prior art keywords
detection circuit
longitudinal
resistance value
stretch
port
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Application number
PCT/CN2019/076317
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English (en)
Chinese (zh)
Inventor
李贺
陈鑫
胡康军
Original Assignee
深圳市柔宇科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to CN201980073528.2A priority Critical patent/CN113260966A/zh
Priority to PCT/CN2019/076317 priority patent/WO2020172817A1/fr
Publication of WO2020172817A1 publication Critical patent/WO2020172817A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Definitions

  • the invention relates to the field of touch sensors, in particular to a stretchable touch sensor and a control method thereof.
  • the performance of the stretchable touch sensor is affected by the resistance change of the signal channel in the stretched state.
  • the sensing coordinate information before and after the same position is stretched will be different, which may cause the operation feedback from the stretchable touch sensor to be completely different from the operation that the user wants to perform, thereby causing confusion to the user's operation.
  • the technical problem to be solved by the embodiments of the present invention is to provide a stretchable touch sensor and a control method thereof.
  • the stretchable touch sensor can be operated normally before and after stretching.
  • an embodiment of the first aspect of the present invention provides a stretchable touch sensor, including:
  • a substrate, the substrate is provided with a stretch detection circuit and the touch circuit;
  • a resistance value detection unit which detects the initial resistance value and the tension resistance value of the tension detection circuit before and after the tension
  • the control unit is electrically connected to the resistance value detection unit, and the control unit is configured to calculate the resistance value change of the extension detection circuit after being stretched according to the initial resistance value and the extension resistance value of the extension detection circuit the amount;
  • the control unit is further configured to adjust the signal of the touch circuit according to the amount of resistance change.
  • An embodiment of the second aspect of the present invention provides a method for controlling a stretchable touch sensor.
  • the stretchable touch sensor includes a touch circuit, a substrate, a stretch detection circuit, a resistance detection unit, and a control unit;
  • the control method of the stretchable touch sensor includes:
  • the signal of the touch circuit is adjusted according to the amount of resistance change.
  • the resistance value detection unit detects the initial resistance value and the stretch resistance value of the stretch detection circuit before and after the stretch, and the control unit communicates with the resistance value
  • the detection unit is electrically connected, and the control unit is used to calculate the resistance value change of the tensile detection circuit after being stretched according to the initial resistance value and the tensile resistance value of the tensile detection circuit; the control unit stores the For the initial sensing coordinate information of the stretch sensor when it is not stretched, the control unit is also used to adjust the signal of the touch circuit according to the resistance change. Therefore, the control unit can correctly recognize the user's operation by adjusting the signal of the touch circuit, and the performance of the stretchable touch sensor will not be affected, thereby not causing trouble to the user's touch operation.
  • FIG. 1 is a schematic diagram of a stretchable touch sensor according to a first embodiment of the present invention
  • FIG. 2 is a partial schematic diagram of the stretchable touch sensor according to the first embodiment of the present invention.
  • Figure 3 is a cross-sectional view taken along line OO' in Figure 2;
  • 4a to 4c are schematic diagrams of the stretchable touch sensor detecting the initial resistance value and the stretched resistance value before and after stretching according to the first embodiment of the present invention
  • FIG. 5 is a waveform diagram of the enable signal sent by the control unit to the resistance detection unit according to the first embodiment of the present invention
  • FIG. 6 is a flowchart of a method for controlling a stretchable touch sensor according to an embodiment of the present invention
  • FIG. 7 is a partial schematic diagram of a stretchable touch sensor according to a second embodiment of the present invention.
  • Fig. 8 is a cross-sectional view taken along line OO' in Fig. 6;
  • FIG. 9 is a partial schematic diagram of a stretchable touch sensor according to a third embodiment of the present invention.
  • Figure 10 is a cross-sectional view taken along line OO' in Figure 8.
  • 110-touch circuit 110-touch circuit; 111-touch electrode; 112-touch lead; 120-substrate; 130,230,330-first longitudinal stretch detection circuit; 131,231,331-first longitudinal part; 132,232 -First transverse part; 140, 240, 340- second longitudinal stretch detection circuit; 141, 241, 341- second longitudinal part; 142, 242- second transverse part; 150, 250, 350- transverse stretch detection Line; 151, 251, 351-transverse line; 400-resistance detection unit; 500-control unit; A-first port; B-second port; C-third port; D-fourth port; OO'- Section line.
  • the stretchable touch sensor includes a touch circuit 110, a substrate 120, a resistance detection unit 400 and a control unit 500.
  • the stretchable touch sensor is derived from flexible touch technology. It is an all-round innovative product integrating new materials, new processes, and new designs.
  • the stretchable touch sensor not only has a good It also has excellent flexibility and stretchability.
  • the stretchable touch sensor can be stretched in the longitudinal and transverse directions in the plane. Stretchable touch sensors can be used in wearable electronic products in combination with flexible displays, as well as in many fields such as automotive electronics and smart homes.
  • the substrate 120 itself can be stretched in the longitudinal and transverse directions.
  • the substrate 120 is generally rectangular or approximately rectangular in shape.
  • the longitudinal direction refers to the direction in which the length of the substrate 120 is relatively long, and the lateral direction is It refers to the direction in which the length of the substrate 120 is relatively short.
  • the substrate 120 may be a stretchable plastic substrate, a glass substrate, or the like.
  • the substrate 120 is provided with a touch circuit 110, the touch circuit 110 includes touch electrodes 111 and touch leads 112, the touch leads 112 and The touch electrodes 111 are electrically connected, and the signals on the touch electrodes 111 are led out through the touch leads 112.
  • the touch circuit 110 is used to detect the actual sensing coordinates of the user, and then the control unit 500 completes the corresponding touch feedback according to the commands corresponding to the actual sensing coordinates.
  • the substrate 120 is also provided with a stretch detection circuit, which can be stretched, so that when the substrate 120 is stretched, the stretch detection circuit will be stretched at the same time. After the stretch detection circuit is stretched, its resistance value will change.
  • the stretch detection circuit includes a transverse stretch detection circuit 150 and a longitudinal stretch detection circuit, and the length of the transverse stretch detection circuit 150 is less than the length of the longitudinal stretch detection circuit.
  • the longitudinal stretching detection circuit includes a first longitudinal stretching detection circuit 130 and a second longitudinal stretching detection circuit 140, that is, the length of the lateral stretching detection circuit 150 is smaller than that of the first longitudinal stretching detection circuit 130 and the second longitudinal stretching detection circuit 130. The sum of the lengths of the longitudinal stretch detection circuit 140, the transverse stretch detection circuit 150 and the longitudinal stretch detection circuit at least partially overlap.
  • the first longitudinal stretching detection circuit 130, the second longitudinal stretching detection circuit 140, the lateral stretching detection circuit 150, and the touch circuit 110 are all located on the same surface of the substrate 120, for example, they are all located on the substrate 120.
  • the upper or lower surface, here is the upper surface of the substrate 120.
  • they may all be located on the lower surface.
  • the stretching detection circuit may also include only one or two of the first longitudinal stretching detection circuit, the second longitudinal stretching detection circuit, and the lateral stretching detection circuit.
  • the stretch detection circuit is close to the outer contour of the substrate 120 and at least partially surrounds the touch circuit 110.
  • the first longitudinal stretch detection circuit 130, the second longitudinal stretch detection circuit 140, and the horizontal The stretch detection circuit 150 is located at the periphery of the touch circuit 110 and at least partially surrounds the touch circuit 110.
  • the first longitudinal stretch detection circuit 130, the second longitudinal stretch detection circuit 140, and the lateral stretch detection circuit 150 are located on the substrate.
  • the touch line 110 is located in the edge area of the substrate 120, and the touch electrode 111 is provided on most of the stretchable touch sensor to realize the touch function.
  • first longitudinal stretching detection circuit 130 and the second longitudinal stretching detection circuit 140 mainly extend along the longitudinal direction of the substrate 120, and the first longitudinal stretching detection circuit 130 and the second longitudinal stretching detection circuit 130
  • the extension detection lines 140 are respectively located on opposite sides of the substrate 120, and in FIG. 2 are respectively located on the left and right sides of the substrate 120.
  • both ends of the first longitudinal extension detection circuit 130 are respectively provided with a first port A and a second port B, and both ends of the second longitudinal extension detection circuit 140 are respectively provided with a third port. Port C and the fourth port D.
  • the first port A, the second port B, the third port C, and the fourth port D are located on the same side of the substrate 120, and are located on the upper side of the substrate 120 here.
  • the first port A is located away from the touch circuit 110 relative to the second port B.
  • the first port A is on the outside of the substrate 120 relative to the second port B
  • the fourth port D is opposite to
  • the third port C is located away from the touch circuit 110.
  • the third port C is located inside the substrate 120 relative to the fourth port in the lateral direction.
  • the two ends of the lateral stretch detection circuit 150 share the first port A and the fourth port D respectively, that is, the two ends of the lateral stretch detection circuit 150 are the first port A and the fourth port D, respectively, so that Save the number of ports.
  • the first port A to the fourth port D are used for electrical connection with external devices.
  • the resistance value detection unit 400 detects the initial resistance value and the tension resistance value of the tension detection circuit before and after the tension. Specifically, before the stretchable touch sensor is stretched, the resistance detection unit 400 detects the initial resistance value of the stretch detection circuit, and after the stretch, the resistance detection unit 400 detects the stretch resistance value of the stretch detection circuit . Specifically, in this embodiment, the resistance detection unit 400 is electrically connected to the first port A, the second port B, the third port C, and the fourth port D, respectively, and the resistance detection unit 400 is used to detect the The resistance values of a longitudinal stretching detection circuit 130, a second longitudinal stretching detection circuit 140, and a transverse stretching detection circuit 150 before and after stretching.
  • the resistance value detection unit 400 before the stretchable touch sensor is stretched, the resistance value detection unit 400 outputs a high level to the first port A (see FIG. 4a). At this time, the flow through the second port B can be measured.
  • the current value of the first longitudinal extension detection circuit 130 can be obtained by calculating the ratio of the high level to the current value to obtain the first initial resistance value of the first longitudinal extension detection circuit 130; the resistance value detection unit 400 outputs a high level to The third port C (see Figure 4b). At this time, the current value flowing through the second longitudinal extension detection circuit 140 can be measured through the fourth port D.
  • the resistance value detection unit 400 By calculating the ratio of the high level to the current value, the second The second initial resistance value of the longitudinal extension detection circuit 140; the resistance value detection unit 400 outputs a high level to the first port A (see FIG. 4c), at this time, the flow through the lateral extension detection can be measured through the fourth port D
  • the current value of the line 150 can be obtained by calculating the ratio of the high level to the current value to obtain the third initial resistance value of the lateral extension detection line 150.
  • the resistance value detection unit 400 After that, after the stretchable touch sensor is stretched, the resistance value detection unit 400 outputs a high level to the first port A (see FIG. 4a), and the first longitudinal stretch detection circuit 130 can also be obtained through calculation. Stretch resistance value; the resistance value detection unit 400 outputs a high level to the third port C (see FIG.
  • the unit 400 outputs a high level to the first port A (see FIG. 4c), and the third stretch resistance value of the lateral stretch detection circuit 150 can also be obtained through calculation.
  • control unit 500 is electrically connected to the resistance detection unit 400, the control unit 500 outputs an enable signal to the resistance detection unit 400, and the resistance detection unit 400 Different time-sharing signals output high-level signals or ground signals to any one of the first port A, the second port B, the third port C, and the fourth port D, that is, the resistance value detection unit 400 is Different signals are output to the stretch detection circuit in different periods.
  • control unit 500 is configured to calculate the resistance value change of the tensile detection circuit after being stretched according to the initial resistance value and the tensile resistance value of the tensile detection circuit.
  • the control unit 500 is also used to adjust the signal of the touch circuit according to the change in resistance.
  • control unit 500 is configured to correct the sensing coordinates of the touch circuit 110 after being stretched according to the resistance change amount.
  • control unit is further configured to compensate the signal attenuation after the touch line is stretched according to the resistance change.
  • the control unit 500 stores initial sensing coordinate information when the stretchable touch sensor is not stretched, where the initial sensing coordinate information is two-dimensional coordinate information, specifically horizontal and vertical coordinate information .
  • the control unit 500 can compare the two-dimensional coordinate information with the stretchable touch sensor's stretched sensing coordinates to confirm that the user touches the actual position on the stretchable touch sensor.
  • This initial sensing coordinate information is the most It has been artificially set from the beginning.
  • the change in resistance value has a linear relationship with the stretched deformation amount. Therefore, the control unit 500 is based on the first initial resistance value, the second initial resistance value, and the first stretch resistance value.
  • the second tensile resistance value is calculated to obtain the longitudinal resistance change of the tensile test circuit after being stretched, and the transverse resistance of the tensile test circuit after being stretched is calculated according to the third initial resistance value and the third tensile resistance value.
  • the control unit 500 calculates the transverse deformation and the longitudinal deformation of the stretch detection line according to the transverse resistance change and the longitudinal resistance change, and the control unit 500 performs the initial sensing coordinate information The correction is performed to obtain the sensing coordinate information after stretching, that is, the sensing coordinate after the touch circuit 110 is stretched is corrected.
  • the control unit may directly correct the initial induction coordinate information according to the lateral resistance change amount and the longitudinal resistance change amount to obtain stretch induction coordinate information.
  • control unit 500 can correctly recognize the user's actual touch position after the stretchable touch sensor is stretched according to the stretch sensing coordinate information, and then the control unit 500 can find the corresponding touch command according to the actual touch position to achieve the correct The touch feedback will not cause trouble to the user’s touch operation.
  • control unit may also compensate for the signal attenuation after the touch line is stretched according to the lateral resistance change and the longitudinal resistance change, for example: the control The unit calculates the lateral deformation amount and the longitudinal deformation amount of the stretch detection circuit according to the lateral resistance value change amount and the longitudinal resistance value change amount; the control unit touches according to the lateral deformation amount and the longitudinal deformation amount The signal attenuation after the line is stretched is compensated, so that the performance of the stretchable sensor will not be affected by the stretch.
  • the control unit may not only correct the sensing coordinates after the touch circuit is stretched, but also compensate the signal attenuation after the touch circuit is stretched.
  • the stretch detection circuit includes a signal input terminal, a first signal output terminal, and a second signal output terminal.
  • the control unit 500 inputs a signal at the signal input terminal, it determines the longitudinal direction according to the output result of the first signal output terminal.
  • the resistance value change amount is determined according to the output result of the second signal output terminal.
  • the first port A is the signal input end of the tensile detection circuit
  • the second port B is the first signal output end of the tensile detection circuit
  • the fourth port D is the tensile detection circuit.
  • the second signal output terminal of the line is the first signal input end of the tensile detection circuit.
  • first port A and the third port C are both the signal input ends of the tensile detection circuit
  • the second port B and the fourth port D are the first signal output of the tensile detection circuit
  • the fourth port D is the second signal output end of the stretch detection circuit, that is, the first signal output end and the second signal output end share the fourth port.
  • first port A and the third port C may also be used as signal output terminals
  • the second port B and the fourth port D may also be used as signal input terminals.
  • the first longitudinal stretch detection circuit 130 is located on the left side of the touch circuit 110, that is, on the left edge of the substrate 120, the first longitudinal stretch The detection circuit 130 includes a first lateral portion 132 and two first longitudinal portions 131; the second longitudinal stretch detection circuit 140 is located on the right side of the touch circuit 110, that is, on the right edge of the substrate 120, The two longitudinal stretch detection lines 140 include a second transverse portion 142 and two second longitudinal portions 141.
  • the ends of the two first longitudinal portions 131 are respectively electrically connected to the two ends of the first transverse portion 132, thereby forming a small "U" shape.
  • the head ends are respectively the first port A and the second port B;
  • the second longitudinal stretch detection circuit 140 includes two second longitudinal portions 141, and the ends of the two second longitudinal portions 141 are respectively connected to the second transverse portion
  • the two ends of the 142 are electrically connected to form a small "U" shape, and the head ends of the two second longitudinal portions 141 are the third port C and the fourth port D respectively.
  • the first lateral portion 132 and the second lateral portion 142 are electrically connected via a lateral line 151, and the first longitudinal portion 131, the first lateral portion 132, and the lateral line 151 are connected to the first port A.
  • the second transverse portion 142 and the second longitudinal portion 141 connected to the fourth port D together constitute the transverse stretch detection circuit 150, that is, the electrical property formed from the first port A through the transverse circuit 151 to the fourth port D
  • the line is a transverse stretch detection line 150, and the transverse stretch detection line 150 is a "U" shape.
  • first longitudinal portion 131 and the second longitudinal portion 141 are parallel to each other, and both extend along the longitudinal direction of the substrate 120, which is the vertical direction in FIG.
  • the horizontal portion 142 and the horizontal line 151 are located on the same straight line, and the straight line is perpendicular to the first longitudinal portion 131 and the second longitudinal portion 141.
  • the straight line is a horizontal direction.
  • the lateral line 151 is located between the first lateral portion 132 and the second lateral portion 142.
  • the control unit 500 is electrically connected to the resistance detection unit 400, and the control unit 500 sends an enable signal and other signals to the resistance detection unit 400.
  • the enable signal is periodic, and the period T of the enable signal includes a first total time period T1 and a second total time period T2.
  • the enable signal is in the first total time period T1 At a high level, the enable signal is at a low level during the second total time period T2.
  • the resistance detection unit 400 detects the initial resistance value and the tensile resistance value of the tensile detection circuit, that is, the The stretch detection circuit receives a high-level signal during the first total time period and outputs a current.
  • the enable signal sent by the control unit 500 to the resistance detection unit 400 is low, the resistance detection unit 400 sends a ground The signal is given to the stretch detection circuit to reduce the influence of external signals on the touch circuit, that is, the stretch detection circuit is grounded during the second total time period to shield the touch circuit from external static electricity.
  • the enable signal changes mainly in the following three ways:
  • Dynamic mode for example, in this mode, when the user is detected to touch, switch to enter the first total time period T1, when the resistance of the stretch detection line does not change for a certain period of time, switch to the first 2. Total time period T2.
  • the first total time period T1 includes a first time period, a second time period, and a third time period
  • the second total time period T2 includes a fourth time period.
  • the resistance value detection unit 400 sends a certain high level to the first port A, so that the current value on the first longitudinal extension detection circuit 130 can be detected, and the first longitudinal extension can be calculated.
  • the resistance value of the stretch detection circuit 130 When the stretchable touch sensor is not stretched, the resistance value is the first initial resistance value. When the stretchable touch sensor is stretched, the resistance value is the first resistance value.
  • the resistance value detection unit 400 sends a certain high level to the third port C, and then the resistance value of the second longitudinal extension detection circuit 140 can be calculated.
  • the resistance value is the second initial resistance value.
  • the resistance value is the second stretch resistance value; the same goes for the third time
  • the resistance value detection unit 400 in the paragraph above sends a certain voltage value to the first port A, and then the resistance value of the lateral stretch detection circuit 150 can be calculated.
  • the resistance value is The third initial resistance value, when the stretchable touch sensor is stretched, the resistance value is the third stretch resistance value.
  • the first time period, the second time period, and the third time period do not overlap with each other.
  • the resistance value detection unit can directly obtain the resistance value of the first longitudinal stretch detection circuit in the first time period.
  • the resistance value is the first initial resistance value.
  • the resistance value is the first stretch resistance value; in the second time period, the resistance value detection unit can directly obtain the second longitudinal stretch The resistance value of the stretch detection circuit.
  • the resistance value is the second initial resistance value.
  • the resistance value is the second stretch Resistance value; in the second time period, the resistance value detection unit can directly obtain the resistance value of the lateral stretch detection circuit.
  • the resistance value is the third initial resistance value.
  • the resistance value is the third stretch resistance value.
  • the first total time period may include the sum of a first time period, a second time period, and a third time period, or may include multiple first time periods, second time periods, and third time periods. The sum of time periods.
  • the resistance value detection unit 400 sends a ground signal to the first port A in the fourth time period to shield the interference of other signals on the touch circuit.
  • the second total time period may include a fourth time period, or may include multiple fourth time periods.
  • the sum of the first total time period T1 and the second total time period T2 is fixed, that is, a period T is fixed.
  • the higher the resistance detection precision the higher the first total time period T1
  • the greater the number of times that the extension detection line is detected that is, the greater the number of the first total time period T1 including the first time period, the second time period and the third time period, so that the proportion of the first total time period T1 increases .
  • the decrease in the proportion of the second total time period T2 may lead to a decrease in the anti-interference ability; conversely, the lower the resistance detection precision, the fewer times the tensile detection line is detected in the first total time period T1, which means that The smaller the number of the first total time period T1 of the first time period, the second time period, and the third time period, the less the first total time period T1 takes up, the second total time period T2 takes up, and the anti-interference ability improve.
  • the resistance value detection unit and the control unit are located on different circuit boards, but the present invention is not limited to this. In other embodiments of the present invention, the resistance value detection unit and the control unit The units can also be located on the same circuit board or in the same chip.
  • the resistance detection unit 400 can measure the first initial resistance value R0 (AB), the second initial resistance value R0 (CD), and the third initial resistance value R0 (AD) when it is not stretched.
  • AB refers to the line from the first port A to the second port B, that is, the first longitudinal extension detection line
  • CD refers to the line from the third port C to the fourth port D
  • AD refers to the line from the first port A to the fourth port D, that is, the transverse stretch detection line.
  • the first tensile resistance value RL(AB) (see Figure 4a), the second tensile resistance value RL(CD) (see Figure 4b), and the third tensile resistance value RL(AD) can be measured.
  • the change rate of the longitudinal resistance on the left side of the touch circuit 110 E(AB) (RL(AB)-R0(AB))/R0(AB)
  • the change rate of the longitudinal resistance on the left side RE(AB) refers to the resistance change caused by stretching between the first port A and the second port B. Since the first longitudinal stretching detection circuit 130 between the first port A and the second port B is mostly In the longitudinal direction, the resistance change rate RE(AB) can represent the left longitudinal resistance change.
  • the resistance value in the left longitudinal direction of the touch circuit 110 can be corrected or compensated by multiplying RE(AB);
  • the rate of change RE(AD) measured is the resistance value change of the transverse part of the transverse stretch detection circuit due to stretching, specifically half the length of the first transverse part 132 and half the length of the second transverse part 142 And the change in resistance value of the transverse line 151 due to stretching.
  • RE(AD) can represent the change in transverse tensile resistance. Therefore, the resistance value in the lateral direction can be corrected or compensated by multiplying RE(AD).
  • the vertical resistance change at the center of the touch circuit 110 can be represented by RE (AB), or by RE (CD), or by the average value of RE (AB) and RE (CD).
  • the change in the lateral resistance on the line 110 can be represented by RE(AD), and the change in the longitudinal resistance and the change in the lateral resistance on the touch circuit 110 can be corrected or compensated. Understandably, because the substrate can basically maintain the same unidirectional deformation amount when it is stretched, only one of RE (AB) and RE (CD) can be measured to obtain the longitudinal resistance change rate.
  • the longitudinal deformation on the touch circuit 110 may be represented by ⁇ L(AB), or by ⁇ L(CD), or by the average value of ⁇ L(AB) and ⁇ L(CD). Therefore, through the deformation correction, the initial sensing coordinate information can be corrected, so as to realize the correction of the sensing coordinate after the touch line is stretched.
  • first longitudinal portion 131, the second longitudinal portion 141, the first transverse portion 132, the second transverse portion 142, and the transverse line 151 are all composed of wires, which have certain stretchability. It is made of conductive materials (such as silver glue, carbon paste, liquid metal, etc.) through specific processes (such as printing, spraying, transfer, etc.).
  • the length of the first longitudinal portion 131 is much greater than the length of the first lateral portion 132, so that the influence of the first lateral portion 132 on the longitudinal length deformation ⁇ L(AB) can be minimized.
  • the length of the second longitudinal portion 141 is much greater than the length of the second transverse portion 142, so that the influence of the second transverse portion 142 on the longitudinal length deformation ⁇ L(CD) can be minimized.
  • the ratio of the length of the first longitudinal portion 131 to the length of the first transverse portion 132 is greater than or equal to 10
  • the ratio of the length of the second longitudinal portion 141 to the length of the second transverse portion 142 is greater than or equal to 10.
  • the present invention also provides a control method for a stretchable touch sensor.
  • the control method for the stretchable touch sensor corresponds to the stretchable touch sensor described above.
  • the stretchable touch sensor includes a touch circuit, The substrate, the stretch detection circuit, the resistance value detection unit, and the control unit, as the stretchable touch sensor has been described in detail above, will not be repeated here. 1 and 6, the control method of the stretchable touch sensor includes the following steps:
  • the resistance value detection unit 400 before the stretchable touch sensor is stretched, the resistance value detection unit 400 outputs a high level to the stretch detection circuit, so that the initial resistance value of the stretch detection circuit can be calculated.
  • the stretching detection circuit includes a first longitudinal stretching detection circuit 130, a second longitudinal stretching detection circuit 140, and a transverse stretching detection circuit 150. Please refer to FIGS. 4a-4c in combination.
  • the resistance detection unit 400 before the stretchable touch sensor is stretched, the resistance detection unit 400 outputs a high level to the first port A (see FIG. 4a).
  • the value detection unit 400 can calculate the first initial resistance value of the first longitudinal extension detection circuit 130; the resistance value detection unit 400 outputs a high level to the third port C (see FIG.
  • the resistance value detection unit 400 now The second initial resistance value of the second longitudinal extension detection circuit 140 can be calculated; the resistance detection unit 400 outputs a high level to the first port A (see FIG. 4c), and the resistance detection unit 400 can calculate the horizontal
  • the third initial resistance value of the detection circuit 150 is stretched.
  • the resistance value detection unit 400 outputs a high level to the stretch detection circuit, so that the stretch resistance value of the stretch detection circuit can be calculated.
  • FIGS. 4a-4c in combination.
  • the resistance detection unit 400 outputs a high level to the first port A (see FIG. 4a).
  • the first extension resistance value of the first longitudinal extension detection circuit 130 is calculated; the resistance value detection unit 400 outputs a high level to the third port C (see FIG. 4b), and the second longitudinal extension detection can be obtained by calculation.
  • the second tensile resistance value of the circuit 140; the resistance value detection unit 400 outputs a high level to the first port A (see FIG. 4c), and the third tensile resistance value of the lateral tensile detection circuit 150 can be calculated at this time.
  • S130 Calculate the resistance value change of the stretchable touch sensor after being stretched according to the initial resistance value and the stretch resistance value;
  • the control unit 500 calculates the resistance value change of the stretchable touch sensor after stretching according to the initial resistance value and the stretching resistance value.
  • the resistance value change includes the lateral resistance value.
  • the control unit 500 calculates the first longitudinal resistance change according to the first initial resistance value and the first tensile resistance value, and obtains the first longitudinal resistance change according to the second initial resistance value and the second The tensile resistance value is calculated to obtain the second longitudinal resistance change, and the control unit 500 calculates the longitudinal resistance change according to the first longitudinal resistance change and the second longitudinal resistance change; the control unit 500 calculates the longitudinal resistance change according to the third initial resistance value , The third tensile resistance value is calculated to obtain the lateral resistance change.
  • S140 Adjust the signal of the touch circuit according to the amount of resistance change.
  • step S140 includes: correcting the sensing coordinates of the stretched touch circuit according to the resistance change.
  • control unit 500 stores initial sensing coordinate information, so that the control unit 500 can directly obtain the initial sensing coordinate information of the stretchable touch sensor.
  • the control unit 400 corrects the stretched sensing coordinates of the touch circuit according to the resistance change, and specifically corrects the stretched sensing coordinates of the touch circuit according to the lateral resistance change and the longitudinal resistance change.
  • step S140 includes: compensating for the signal attenuation after the touch circuit is stretched according to the resistance change.
  • the step of "correcting the induced coordinates after the touch line is stretched according to the change in resistance value" specifically includes:
  • the induced coordinate after the touch line is stretched is corrected.
  • the amount of resistance change and the amount of deformation have a linear relationship, so the control unit 500 can calculate the amount of deformation of the stretch detection circuit according to the amount of resistance change, specifically according to the amount of change in lateral resistance and The longitudinal resistance change amount is calculated to obtain the transverse deformation and the longitudinal deformation of the stretch detection circuit. Thereafter, the control unit 500 may correct the sensing coordinates of the touch circuit after stretching according to the deformation of the stretch detection circuit, and specifically perform the correction of the sensing coordinates of the touch circuit after stretching according to the horizontal deformation and the longitudinal deformation. Fix.
  • both ends of the first longitudinal extension detection circuit are respectively provided with a first port and a second port, and both ends of the second longitudinal detection circuit are respectively provided with a third port.
  • the first port and the fourth port are shared by both ends of the lateral stretch detection circuit respectively.
  • the resistance value detection unit is electrically connected to the first port, the second port, the third port, and the fourth port.
  • step S120 specifically includes:
  • the resistance value detection unit inputs a high-level signal to the first longitudinal stretch detection circuit through the first port;
  • the resistance value detection unit inputs a high-level signal to the second longitudinal extension detection circuit through the third port;
  • the resistance value detection unit inputs a high-level signal to the lateral stretch detection circuit through the first port;
  • the tensile resistance value of the first longitudinal extension detection circuit 130, the extension resistance value of the second longitudinal extension detection circuit 140, and the extension resistance value of the transverse extension detection circuit 150 are calculated by calculation; wherein, the first time period , The second time period and the third time period do not overlap.
  • step S120 specifically includes:
  • the resistance value detection unit obtains the tensile resistance value of the first longitudinal tensile detection circuit in the first time period
  • the resistance value detection unit obtains the tensile resistance value of the second longitudinal extension detection circuit
  • the resistance value detection unit obtains the tensile resistance value of the lateral extension detection circuit; wherein the first time period, the second time period, and the third time period do not overlap.
  • control method of the stretchable touch sensor further includes: in the fourth time period, the resistance value detection unit 400 inputs ground signals to the first longitudinal direction through the first port A to the fourth port D, respectively.
  • the stretching detection circuit 130, the second longitudinal stretching detection circuit 140 and the lateral stretching detection circuit 150 can reduce the influence of external signals on the touch circuit 110 and improve the shielding effect.
  • the fourth time period does not overlap with the first time period, the second time period, and the third time period.
  • FIG. 7 is a partial schematic diagram of the stretchable touch sensor according to the second embodiment of the present invention.
  • the schematic diagram of FIG. 7 is similar to the schematic diagram of FIG. 2. Therefore, the same component symbols represent the same components, which will not be repeated here.
  • the main difference between this embodiment and the first embodiment is that the first longitudinal stretching detection circuit, the second longitudinal stretching detection circuit, and the lateral stretching detection circuit are located on the same surface of the substrate, and the touch circuits are all located on the other side of the substrate. one side.
  • the first longitudinal stretch detection circuit 230, the second longitudinal stretch detection circuit 240, and the transverse stretch detection circuit 250 are located on the same surface of the substrate 120.
  • the touch circuits 110 are all located on the other side of the substrate 120, here on the upper surface of the substrate 120.
  • the projections of the first longitudinal stretch detection circuit 230, the second longitudinal stretch detection circuit 240, and the transverse stretch detection circuit 250 on the substrate plane are arranged around the edge of the touch circuit 110, and That is, the first longitudinal stretching detection circuit 230, the second longitudinal stretching detection circuit 240, and the lateral stretching detection circuit are located at the edge of the lower surface of the substrate 120.
  • the first longitudinal portion 231, the second longitudinal portion 241, the first transverse portion 232, the second transverse portion 242, and the transverse circuit 251 are all composed of wires, which have certain stretchability. It is made of conductive materials (such as silver glue, carbon paste, liquid metal, etc.) through specific processes (such as printing, spraying, transfer, etc.).
  • conductive materials such as silver glue, carbon paste, liquid metal, etc.
  • specific processes such as printing, spraying, transfer, etc.
  • FIG. 9 is a partial schematic diagram of a stretchable touch sensor according to a third embodiment of the present invention.
  • the schematic diagram of FIG. 9 is similar to the schematic diagram of FIG. 7. Therefore, the same component symbols represent the same components and will not be repeated here.
  • the main difference between this embodiment and the second embodiment is that the first longitudinal portion and the second longitudinal portion near the inner side are block-shaped.
  • the first longitudinal portion 331 and the two second longitudinal portions 341 are closer to the inner side in the lateral direction.
  • the portion 341 is in a block shape, the first longitudinal portion 331 of the two first longitudinal portions 311 that is laterally close to the outside, the second longitudinal portion 341 of the two second longitudinal portions 341 that is laterally close to the outside, and the first horizontal portion 332, the second horizontal portion 342, and the horizontal line 351 are linear, and the block-shaped first vertical portion 331 and the block-shaped second vertical portion 341 at least partially cover the touch circuit 110, where most of the Touch electrodes 111 and touch leads 112.
  • the loop formed by ABCD can play a role in shielding external signals.
  • the block-shaped first longitudinal portion 331 and the block-shaped second longitudinal portion 341 have a much larger area than the second embodiment, the interference of external signals on the touch circuit 110 can be greatly reduced.
  • the first longitudinal portion that is closer to the outer side in the lateral direction among the two first longitudinal portions, and the second longitudinal portion that is closer to the outer side in the lateral direction among the two second longitudinal portions may also be blocks.
  • the two first longitudinal portions and the two second longitudinal portions both cover at least part of the touch circuit to shield the interference of external signals on the signal on the touch circuit.
  • the first longitudinal portion that is closer to the outside in the lateral direction among the two first longitudinal portions, and the second longitudinal portion that is closer to the inner side in the lateral direction among the two second longitudinal portions may also be blocks. Shape, or the two first longitudinal portions and the two second longitudinal portions are block-shaped, etc., and the first longitudinal portion and the second longitudinal portion cover at least part of the touch circuit.
  • first longitudinal portion 331 that is closer to the outside in the lateral direction among the two first longitudinal portions 331 and the second longitudinal portion 341 that is closer to the inner side in the lateral direction among the two second longitudinal portions 341 are block-shaped, As a result, the distance between the first longitudinal portion 331 and the second longitudinal portion 341 will be relatively small, and the length of the horizontal line 351 will be relatively short.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Position Input By Displaying (AREA)

Abstract

La présente invention concerne, dans un mode de réalisation, un capteur tactile étirable, comprenant : un circuit tactile (110) ; un substrat (120) pourvu d'un circuit de détection d'étirement et du circuit tactile (110) ; une unité de détection de résistance utilisée pour détecter une résistance initiale et une résistance post-étirement du circuit de détection d'étirement avant et après l'étirement ; une unité de commande (500) connectée électriquement à l'unité de détection de résistance, l'unité de commande (500) effectuant un calcul en fonction de la résistance initiale et de la résistance post-étirement du circuit de détection d'étirement pour obtenir une variation de résistance du circuit de détection d'étirement après étirement et ajustant un signal du circuit tactile (110) en fonction de la variation de résistance. L'invention concerne également un procédé de commande pour un capteur tactile étirable. La présente invention permet un fonctionnement normal d'un capteur tactile étirable avant et après l'étirement.
PCT/CN2019/076317 2019-02-27 2019-02-27 Capteur tactile étirable et procédé de commande associé WO2020172817A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980073528.2A CN113260966A (zh) 2019-02-27 2019-02-27 可拉伸触控传感器及其控制方法
PCT/CN2019/076317 WO2020172817A1 (fr) 2019-02-27 2019-02-27 Capteur tactile étirable et procédé de commande associé

Applications Claiming Priority (1)

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PCT/CN2019/076317 WO2020172817A1 (fr) 2019-02-27 2019-02-27 Capteur tactile étirable et procédé de commande associé

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Citations (6)

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CN1692371A (zh) * 2002-05-17 2005-11-02 3M创新有限公司 基于力的触摸屏系统的校正
US20140009434A1 (en) * 2012-07-06 2014-01-09 Hyundai Motor Company Electronic device implementing a touch panel display unit
CN104781778A (zh) * 2012-10-04 2015-07-15 三星电子株式会社 柔性显示装置及其控制方法
CN104823138A (zh) * 2013-09-10 2015-08-05 深圳纽迪瑞科技开发有限公司 一种压力感应式触摸屏和触摸显示屏及电子设备
CN107526465A (zh) * 2016-06-22 2017-12-29 三星显示有限公司 触摸传感器和通过使用该触摸传感器检测触摸的方法
CN108459780A (zh) * 2017-02-03 2018-08-28 三星显示有限公司 传感器和包括其的显示装置

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CN107340912B (zh) * 2017-06-30 2020-08-14 上海天马微电子有限公司 触控面板、触控显示装置、触控压力检测方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1692371A (zh) * 2002-05-17 2005-11-02 3M创新有限公司 基于力的触摸屏系统的校正
US20140009434A1 (en) * 2012-07-06 2014-01-09 Hyundai Motor Company Electronic device implementing a touch panel display unit
CN104781778A (zh) * 2012-10-04 2015-07-15 三星电子株式会社 柔性显示装置及其控制方法
CN104823138A (zh) * 2013-09-10 2015-08-05 深圳纽迪瑞科技开发有限公司 一种压力感应式触摸屏和触摸显示屏及电子设备
CN107526465A (zh) * 2016-06-22 2017-12-29 三星显示有限公司 触摸传感器和通过使用该触摸传感器检测触摸的方法
CN108459780A (zh) * 2017-02-03 2018-08-28 三星显示有限公司 传感器和包括其的显示装置

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