CN102346615A - Resistive/capacitive hybrid touch device and driving method of touch device - Google Patents
Resistive/capacitive hybrid touch device and driving method of touch device Download PDFInfo
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Abstract
The invention provides a resistive/capacitive hybrid touch device, which comprises a resistive touch module, a capacitive touch module and a separating layer; the resistive touch module comprises a first substrate and a first sensing layer; the capacitive touch module comprises a second substrate and a second sensing layer; the second sensing layer comprises a plurality of first sensing pads and a plurality of second sensing pads; and the separating layer is arranged between the first sensing layer and the second sensing layer. By adopting the resistive/capacitive hybrid touch device, voltage changes of the first sensing layer can be detected via the first sensing pads and the second sensing pads so as to achieve resistive detection, and capacitive detection can also be achieved via the first sensing pads and the second sensing pads. The functions of a resistive touch device and a capacitive touch device are combined simultaneously in a single touch panel, and the advantages of the resistive touch device and the capacitive touch device can be utilized simultaneously.
Description
Technical Field
The present invention relates to a touch device, and more particularly, to a resistance/capacitance hybrid touch device and a driving method of the touch device.
Background
In recent years, the touch screen has gained market acceptance due to the adoption of touch mobile phones, and therefore, a great number of manufacturers have joined the development and design line of the touch screen. Touch devices are mainly classified into capacitive Touch (capacitive Touch) devices and Resistive Touch (Resistive Touch) devices.
The resistance-type touch control device has high linearity and accurate positioning and is suitable for a common touch control pen (touch pen); the resistive touch device is suitable for writing, drawing and other applications. However, the resistive touch device must be operated with a certain amount of pressure, which is not favorable for finger operation. The capacitive touch device can be operated by touching or approaching the surface of the panel without pressing down the panel, namely the capacitive touch device can be easily operated by fingers. However, capacitive touch devices are less linear, less accurate in positioning, and require sensing a certain area to operate, and thus are not well suited for operation with a stylus. The capacitive touch device is not suitable for writing and drawing, but is suitable for a general user interface. Therefore, the capacitive touch device and the resistive touch device have advantages and disadvantages, respectively.
Disclosure of Invention
The present invention is directed to a resistance/capacitance hybrid touch device, which solves the problem of the prior art that the functions of a resistance and a capacitance touch device cannot be combined in a single touch panel.
The invention is realized in such a way that the resistance/capacitance hybrid touch device comprises a resistance type touch module, a capacitance type touch module and a spacing layer; the resistance-type touch module comprises a first substrate and a first sensing layer; the first sensing layer is arranged on the first substrate; the capacitive touch module comprises a second substrate and a second sensing layer; the second sensing layer is arranged on the second substrate; the second sensing layer comprises a plurality of first sensing pads and a plurality of second sensing pads; the spacing layer is arranged between the first sensing layer and the second sensing layer to isolate the resistance-type touch module from the capacitance-type touch module.
Another objective of the present invention is to provide a driving method of a touch device, the touch device includes a resistive touch module, a spacer layer and a capacitive touch module, wherein the resistive touch module includes a first substrate and a first sensing layer, the first sensing layer is disposed on the first substrate, the capacitive touch module includes a second substrate and a second sensing layer, the second sensing layer is disposed on the second substrate and includes a plurality of first sensing pads and a plurality of second sensing pads, the spacer layer is disposed between the first sensing layer and the second sensing layer; the method comprises the following steps: applying a voltage to the first sensing layer and detecting a voltage change of the first sensing layer by using the plurality of first sensing pads and the plurality of second sensing pads; calculating the position of a contact point on the touch device according to the voltage change of the first sensing layer; grounding the first sensing layer and detecting capacitance changes of the first sensing pads and the second sensing pads; and calculating the position of the contact point on the touch device according to the capacitance value changes of the first sensing pads and the second sensing pads.
In the present invention, the driving method of the resistance/capacitance hybrid touch device and the touch device can use the first sensing pads and the second sensing pads to detect the voltage variation of the first sensing layer for resistance detection, and use the first sensing pads and the second sensing pads for capacitance detection. Therefore, the resistance/capacitance hybrid touch device combines the functions of the resistance touch device and the capacitance touch device in a single touch panel, and can simultaneously utilize the advantages of the resistance touch device and the capacitance touch device.
Drawings
Fig. 1 is a schematic cross-sectional view of a resistive/capacitive hybrid touch device according to the present invention.
Fig. 2 is a top view of an embodiment of the resistive touch module of the present invention.
Fig. 3 is a top view of the capacitive touch module according to the present invention.
FIG. 4 is a diagram of a first control circuit according to an embodiment of the present invention.
FIG. 5 is a diagram of a second control circuit according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of the first embodiment of the resistance/capacitance hybrid touch device according to the present invention during scanning.
Fig. 7 is a schematic diagram of a second embodiment of a resistance/capacitance hybrid touch device according to the present invention during scanning.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Please refer to fig. 1. Fig. 1 is a schematic cross-sectional view of a resistive/capacitive hybrid touch device 10 according to the present invention. The resistance/capacitance hybrid touch device includes a resistance touch module 11, a spacer layer 12 and a capacitance touch module 13. The resistive touch module 11 includes a first substrate 111 and a first sensing layer 112. The first sensing layer 112 is disposed on the first substrate 111. The capacitive touch module 13 includes a second substrate 131 and a second sensing layer 132. The second sensing layer 132 is disposed on the second substrate 131. The second sensing layer 132 includes a plurality of first sensing pads and a plurality of second sensing pads. The first sensing layer 112 faces the second sensing layer 132. The spacer layer 12 is disposed between the first sensing layer 112 and the second sensing layer 132 for isolating the resistive touch module 11 and the capacitive touch module 13. The first sensing layer 112, the first sensing pads and the second sensing pads are formed of a transparent conductive material. Generally, the transparent conductive material is Indium Tin Oxide (ITO), Antimony Tin Oxide (ATO), or Aluminum Zinc Oxide (AZO).
Please refer to fig. 2. Fig. 2 is a top view of a resistive touch module 11 according to an embodiment of the invention. The first sensing layer 112 is a whole transparent conductive material. The resistive touch module 11 further includes four input/output terminals XL, XR, YU, YD respectively disposed on the left, right, top, and bottom sides of the first sensing layer 112. Please refer to fig. 3. Fig. 3 is a top view of the capacitive touch module 13 according to the present invention. The second sensing layer 132 includes n first sensing pads X1-Xn and m second sensing pads Y1-Ym, where n and m are positive integers. The first and second sensing pads X1-Xn and Y1-Ym can be arranged in different forms as the second sensing layer 132; in the present embodiment, the first sensor pads X1-Xn are arranged in a horizontal direction and the second sensor pads Y1-Ym are arranged in a vertical direction (i.e., the arrangement directions of the first sensor pads X1-Xn and the second sensor pads Y1-Ym are perpendicular to each other) to form the second sensor layer 132. Each of the first and second sensing pads X1-Xn and Y1-Ym includes an input/output terminal.
Fig. 4 is a schematic diagram of a first control circuit 20 according to an embodiment of the invention. The first control circuit 20 is used for controlling the voltages of the input/output terminals XL, XR, YU, YD of the resistive touch module 11. The first control circuit 20 includes a first selection circuit 21, a second selection circuit 22, a third selection circuit 23 and a fourth selection circuit 24. The first to fourth selection circuits 21 to 24 respectively include an input terminal i, a first output terminal O1, a second output terminal O2, a third output terminal O3, and a control terminal Ctr. The input terminal i of the first selection circuit 21 is coupled to the input/output terminal YU, the first output terminal O1 of the first selection circuit 21 is coupled to a first voltage source Va, the second output terminal O2 of the first selection circuit 21 is coupled to a ground GND, and the third output terminal O3 of the first selection circuit 21 is floating. The input terminal i of the second selection circuit 22 is coupled to the input/output terminal YD, the first output terminal O1 of the second selection circuit 22 is coupled to a second voltage source Vb, the second output terminal O2 of the second selection circuit 22 is coupled to the ground GND, and the third output terminal O3 of the second selection circuit 22 is floating. The input terminal i of the third selection circuit 23 is coupled to the input/output terminal XR, the first output terminal O1 of the third selection circuit 23 is floating, the second output terminal O2 of the third selection circuit 23 is coupled to the ground GND, and the third output terminal O3 is coupled to the first voltage source Va. The input terminal i of the fourth selection circuit 24 is coupled to the input/output terminal XL, the first output terminal O1 of the fourth selection circuit 24 is floating, the second output terminal O2 of the fourth selection circuit 24 is coupled to the ground GND, and the third output terminal O3 of the fourth selection circuit 24 is coupled to the second voltage source Vb. The first voltage source Va and the second voltage source Vb are preset voltage levels; in the present embodiment, the first voltage source Va provides a high level voltage, and the second voltage source Vb provides a low level voltage. The control terminals Ctr of the first to fourth selection circuits 21 to 24 all receive a control signal Sc.
The bit number of the control signal Sc is an index of the binary number of the input/output terminals of the resistive touch module 11; for example, when the resistive touch module 11 includes 4 i/o terminals, the control signal Sc is 2 bits; when the resistive touch module 11 includes 8 i/o terminals, the control signal Sc is 3 bits. In the embodiment, the resistive touch module 11 includes 4 input/output terminals YU, YD, XL, and XR, and thus the control signal Sc is 2 bits. When the control signal Sc is "" 00 "", the first to fourth selection circuits 21 to 24 couple the input terminal i to the first output terminal O1, respectively; the output/input terminal YU is coupled to the first voltage source Va, the output/input terminal YD is coupled to the second voltage source Vb, and the output/input terminals XR and XL are floating; in other words, a voltage difference is generated between the input/output terminals YU and YD, so that a current flows from the input/output terminal YU to the input/output terminal YD. When the control signal Sc is "01", the first to fourth selection circuits 21 to 24 couple the input terminal i to the third output terminal O3, respectively; the output/input terminal XR is coupled to the first voltage source Va, the output/input terminal XL is coupled to the second voltage source Vb, and the output/input terminals YU and YD are floating; in other words, a voltage difference is generated between the input/output terminals XR and XL, so that a current flows from the input/output terminal XR to the input/output terminal XL. When the control signal Sc is "1 x" (i.e. when the control signal Sc is "10" or "11"), the first to fourth selection circuits 21 to 24 respectively couple the input terminal i to the second output terminal O2 to couple the input/output terminals YU, YD, XL, XR to the ground GND.
Please refer to fig. 5. Fig. 5 is a schematic diagram of a second control circuit 30 according to an embodiment of the invention. The second control circuit 30 is used for detecting a signal of a contact point of the resistance/capacitance hybrid touch device 10. The second control circuit 30 includes p switches SW 1-SWp, a main selection circuit 31, an enable circuit 32, a resistance sensing circuit 33, and a capacitance sensing circuit 34. The parameter p is a positive integer and is the sum of the numbers of the first sensing pads X1-Xn and the second sensing pads Y1-Ym (i.e., p is n + m). The main selection circuit 31 includes a plurality of input terminals I1-Ip and an output terminal Z. The input terminals I1-Ip of the main selection circuit 31 are respectively coupled to a sensing pad (one of the first sensing pads X1-Xn or the second sensing pads Y1-Ym) of the capacitive touch module 13. The main selection circuit 31 is coupled to the output terminal Z by switching the input terminals I1 to Ip according to a main selection control signal Sm, wherein the bit number of the main selection control signal Sm is an exponent of the binary number of the input terminals I1 to Ip; in the present embodiment, the main selection control signal Sm is 4 bits. An input terminal a of the enable circuit 32 is coupled to the output terminal Z of the main selection circuit 31; a first output terminal B of the enabling circuit 32 is coupled to the resistance sensing circuit 33, and a second output terminal C of the enabling circuit 32 is coupled to the capacitance sensing circuit 34. The enable circuit 32 operates according to an enable signal EN; in the present embodiment, when the enable signal EN is "1", the enable circuit 32 couples the input terminal a to the first output terminal B, and when the enable signal EN is "0", the enable circuit 32 couples the input terminal a to the second output terminal C. The first end of each of the switches SW 1-SWp is coupled between the sensing pads (the first sensing pads X1-Xn and the second sensing pads Y1-Ym) of the capacitive touch module 13 and the input ends I1-Ip of the corresponding main selection circuit 31; the second terminal of each of the switches SW 1-SWp is coupled to the first output terminal A of the resistance sensing circuit 33 and the enabling circuit 32. The switches SW 1-SWp are controlled according to a switch control signal Ssw. In the present embodiment, when the switch control signal Ssw is "1", the switches SW 1-SWp are turned on (turned on) to couple the first sensing pads X1-Xn and the second sensing pads Y1-Ym to the capacitance sensing circuit 33; when the switch control signal Ssw is "0", the switches SW 1-SWp are turned off (non-conductive) to directly couple the first and second sensing pads X1-Xn and Y1-Ym to the corresponding input terminals I1-Ip of the main selection circuit 31.
Please refer to fig. 6. Fig. 6 is a schematic diagram of the first embodiment of the resistance/capacitance hybrid touch device 10 according to the present invention during scanning. In the present embodiment, resistive detection has priority, that is, the resistive/capacitive hybrid touch device 10 of the present invention inputs a voltage to the resistive touch module 11 for detection. The resistance/capacitance hybrid touch device 10 outputs a control signal Sc representing "00", where the input/output terminals XR and XL are floating, the input/output terminal YU is coupled to the first voltage source Va and the input/output terminal YD is coupled to the second voltage source Vb to generate a voltage difference, so that the first sensing layer 112 transmits power in the Y direction. In the present embodiment, the first voltage source Va is at a high potential and the second voltage source Vb is at a low potential, so that a current flows from the input/output terminal YU to the input/output terminal YD. Then, the resistance/capacitance hybrid touch device 10 outputs a control signal Sc representing "01", at this time, the input/output terminals YU and YD are floating, the input/output terminal XR is coupled to the first voltage source Va, and the input/output terminal XL is coupled to the second voltage source Vb to generate a voltage difference, so that the first sensing layer 112 transmits power in the X direction. In this embodiment, since the first voltage source Va is at a high level and the second voltage source Vb is at a low level, a current flows from the input/output terminal XR to the input/output terminal XL. When the resistive touch module 11 detects, the resistance/capacitance hybrid touch device 10 simultaneously outputs the switch control signal Ssw representing "1" such that all the first sensing pads X1-Xn and the second sensing pads Y1-Ym on the capacitive touch module 12 are coupled to the resistance sensing circuit 33.
Thus, when the first sensing layer 112 transmits power to the sensing layer 112 in the X or Y direction, the resistance/capacitance hybrid touch device 10 of the invention utilizes the first sensing pads X1-Xn and the second sensing pads Y1-Ym of the capacitive touch module 13 to detect the voltage change on the first sensing layer 112. For example, when the first sensing layer 112 is powered on in the Y direction, an external force is applied to the first substrate 111 or the second substrate 131 to make the first sensing layer 112 contact with the second sensing layer 132, and since all the sensing pads of the capacitive touch module 13 are coupled to the resistive sensing circuit 33 (the switch control signal Ssw is "1", and the switches SW 1-SWp are turned on), the capacitive touch module 13 detects the signal of the contact point, and the resistive sensing circuit 33 can calculate the position of the contact point on the Y axis. Similarly, when the first sensing layer 112 transmits power in the X direction, the capacitive touch module 13 detects the signal of the contact point, and the resistance sensing circuit 33 can calculate the position of the contact point on the X axis.
If the signal of the contact point can be detected by resistive detection, the resistive/capacitive hybrid touch device 10 of the present invention bypasses capacitive detection. If the resistance detection fails to detect the contact point, the resistance/capacitance hybrid touch device 10 will perform capacitance detection, i.e. the resistance/capacitance hybrid touch device 10 will only use the capacitance touch module 13 to perform detection.
As shown in fig. 6, when the resistance/capacitance hybrid touch device 10 performs capacitance detection, the control signal Sc is "1 x", the switch control signal Ssw is "0", and the enable signal EN is "0". When the control signal Sc is "1 x", the input/output terminals YU, YD, XR, XL of the resistive touch module 11 are all coupled to the ground GND (the resistive touch module 11 is turned off), and the resistive touch module 11 can be used as a shielding layer (shielding layer) of the capacitive touch module 13. When the switch control signal Ssw is "0", the switches SW 1-SWp are turned off to couple the first sensing pads X1-Xn and the second sensing pads Y1-Ym on the capacitive touch module 13 to the input terminals I1-Ip of the corresponding main selection circuit 31, respectively. When the enable signal EN is "0", the enable circuit 32 couples the output terminal Z of the main selection circuit 31 to the capacitance sensing circuit 34. The master select control signal Sm is sequentially switched to "0000", "0001", and "0010", so as to sequentially output the signals of the first sensing pads X1 through Xn and the second sensing pads Y1 through Ym on the capacitive touch module 13 to the capacitive sensing circuit 34 through the enabling circuit 32. In other words, when performing the capacitive detection, the capacitive sensing circuit 34 sequentially detects the capacitance changes of the first sensing pads X1 Xn and the second sensing pads Y1 Ym. For example, when a finger touches or approaches the first substrate 111 or the second substrate 131, the capacitance of the first sensing pad and the second sensing pad at the contact point changes, and the X-axis coordinate data and the Y-axis coordinate data of the contact point resistance/capacitance hybrid touch device can be calculated by the detection of the capacitance sensing circuit 34.
In short, in each complete scan, the resistance/capacitance hybrid touch device 10 performs resistance detection first; the resistance sensing circuit 33 detects the voltage variation in the Y-axis direction and the X-axis direction on the first sensing layer 112 through the second sensing layer 132, and if no signal of the contact point is detected, the resistance/capacitance hybrid touch device 10 performs capacitance detection; the capacitance sensing circuit 34 sequentially detects capacitance changes of the first and second sensing pads X1-Xn and Y1-Ym (e.g., according to the sequence of X1, X2, X3... Xn, Y1, Y2, Y3... Ym).
Please refer to fig. 7. Fig. 7 is a schematic diagram of a second embodiment of the resistance/capacitance hybrid touch device 10 according to the present invention during scanning. The second embodiment of the resistance/capacitance hybrid touch device 10 during scanning is similar to the first embodiment. In the first embodiment, the resistance detection is performed by detecting the voltage variation in the Y-axis direction and the X-axis direction on the first sensing layer 112 through the second sensing layer 132, and in the second embodiment, the resistance detection is performed by sequentially detecting the voltage variation in the corresponding position on the first sensing layer 112 through the first sensing pads X1-Xn and the second sensing pads Y1-Ym. That is, the switch control signal Ssw is "0" regardless of the resistive sensing or the capacitive sensing, i.e., the switches SW 1-SWp remain closed while the first sensing pads X1-Xn and the second sensing pads Y1-Ym on the capacitive touch module 13 are respectively coupled to the input terminals I1-Ip of the corresponding main selection circuit 31.
As shown in fig. 7, the control signal Sc is represented as "00" and "01" in order to sequentially supply power to the first sensing layer 112 in the Y direction and the X direction; at this time, the enable signal EN is represented as "1" and the switch control signal Ssw is represented as "0", that is, the main selection circuit 31 couples the first sensing pad X1 to the enable circuit 32, and the enable circuit 32 couples the first sensing pad X1 to the resistance sensing circuit 33. Therefore, the resistance sensing circuit 33 detects the voltage at the position corresponding to the Y direction on the first sensing layer 112 through the first sensing pad X1, and then detects the voltage at the position corresponding to the X direction on the first sensing layer 112 through the first sensing pad X1. Then, the enable signal is switched to "0", the control signal Sc is represented as "1X" and the switch control signal Ssw is maintained at "0", so as to turn off the resistive touch module 11 and enable the circuit 32 coupled to the capacitance sensing circuit 34 (i.e. the first sensing pad X1 coupled to the capacitance sensing circuit 34) to detect the capacitance value change of the first sensing pad X1 by using the capacitance sensing circuit 34. This completes the resistive detection and the capacitive detection using the first sensing pad X1. The master select control signal Sm is switched to "0001", that is, the master select circuit 31 couples the first pad X2 to the enable circuit 32 to repeat the above steps using the first pad X2 to complete the resistive detection and the capacitive detection corresponding to the position of the first pad X2. In this way, the main selection control signal Sm is switched to all the first sensing pads X1 through Xn and the second sensing pads Y1 through Ym, and the above steps are repeated to complete the resistive detection and the capacitive detection of the resistance/capacitance hybrid touch device 10.
In other words, as shown in fig. 1 to 3, when a voltage is applied to the first sensing layer 112 (i.e. the resistance/capacitance hybrid touch device 10 is touched), the resistance/capacitance hybrid touch device 10 utilizes the first sensing pads X1 to Xn and the second sensing pads Y1 to Ym of the second sensing layer 132 to detect the voltage variation of the first sensing layer 112. The resistance/capacitance hybrid touch device 10 calculates a position of a contact point on the resistance/capacitance hybrid touch device 10 according to the voltage variation of the first sensing layer 112. If no signal of the contact point is detected, the resistance/capacitance hybrid touch device 10 grounds the first sensing layer 112 and detects capacitance changes of the first sensing pads X1 through Xn and the second sensing pads Y1 through Ym of the second sensing layer 132. The position of the contact point on the resistance/capacitance hybrid touch device 10 can be calculated according to the capacitance changes of the first sensing pads X1-Xn and the second sensing pads Y1-Ym. As shown in fig. 6, when a voltage is applied to the first sensing layer 112, the resistance/capacitance hybrid touch device 10 can detect a voltage variation of the first sensing layer 112 by using all of the plurality of first sensing pads X1 through Xn and the plurality of second sensing pads Y1 through Ym of the second sensing layer 132. As shown in fig. 7, when a voltage is applied to the first sensing layer 112, the resistance/capacitance hybrid touch device 10 can also sequentially detect the voltage variation of the first sensing layer 112 by using a first sensing pad of the first sensing pads X1-Xn and a second sensing pad of the second sensing pads Y1-Ym of the second sensing layer 132.
In summary, the resistance/capacitance hybrid touch device of the present invention includes a resistance-type touch module, a capacitance-type touch module, and a spacer layer. The resistive touch module comprises a first substrate and a first sensing layer. The capacitive touch module comprises a second substrate and a second sensing layer. The second sensing layer includes a plurality of first sensing pads and a plurality of second sensing pads. The spacing layer is arranged between the first sensing layer and the second sensing layer. The resistance/capacitance hybrid touch device can detect the voltage change of the first sensing layer by using the first sensing pads and the second sensing pads to perform resistance detection, and can perform capacitance detection by using the first sensing pads and the second sensing pads. Therefore, the resistance/capacitance hybrid touch device combines the functions of the resistance touch device and the capacitance touch device in a single touch panel, and can simultaneously utilize the advantages of the resistance touch device and the capacitance touch device.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. A resistive/capacitive hybrid touch device, the touch device comprising:
a resistive touch module, comprising:
a first substrate; and
the first sensing layer is arranged on the first substrate;
a capacitive touch module, comprising:
a second substrate; and
a second sensing layer disposed on the second substrate, comprising:
a plurality of first sensing pads; and
a plurality of second sensing pads; and
and the spacing layer is arranged between the first sensing layer and the second sensing layer so as to isolate the resistance-type touch module from the capacitance-type touch module.
2. The resistive/capacitive hybrid touch device of claim 1, wherein the resistive touch module further comprises:
an upper input/output end disposed on the upper side of the first sensing layer;
a lower input/output end disposed at a lower side of the first sensing layer;
a left input/output end arranged at the left side of the first sensing layer; and
and the right input/output end is arranged on the right side of the first sensing layer.
3. The resistive/capacitive hybrid touch device of claim 2, wherein the touch device further comprises:
a first control circuit, comprising:
a first selection circuit, comprising:
a control terminal for receiving a control signal;
an input end coupled to the upper input/output end;
a first output terminal coupled to a first voltage source;
a second output end coupled to a ground end; and
the third output end is in floating connection;
a second selection circuit, comprising:
a control terminal for receiving the control signal;
an input end coupled to the lower input/output end;
a first output terminal coupled to a second voltage source;
a second output terminal coupled to the ground terminal; and
the third output end is in floating connection;
a third selection circuit, comprising:
a control terminal for receiving the control signal;
an input end coupled to the right input/output end;
the first output end is in floating connection;
a second output terminal coupled to the ground terminal; and
a third output terminal coupled to the first voltage source; and
a fourth selection circuit, comprising:
a control terminal for receiving the control signal;
an input end coupled to the left input/output end;
the first output end is in floating connection;
a second output terminal coupled to the ground terminal; and
a third output terminal coupled to the second voltage source;
the first voltage source provides a high level voltage and the second voltage source provides a low level voltage.
4. The resistive/capacitive hybrid touch device of claim 3, wherein the first selection circuit, the second selection circuit, the third selection circuit and the fourth selection circuit are configured to switch the input terminal to be coupled to the first output terminal, the second output terminal or the third output terminal according to the control signal; when the first selection circuit, the second selection circuit, the third selection circuit and the fourth selection circuit respectively switch the input terminal to be coupled to the ground terminal according to the control signal, the resistive touch module is turned off, and the resistive touch module is used as a shielding layer of the capacitive touch module.
5. The resistive/capacitive hybrid touch device of claim 3, wherein a bit number of the control signal is an exponent of a binary number of a sum of input/output terminals of the resistive touch module.
6. The resistive/capacitive hybrid touch device of claim 1, wherein the first sensing pads are arranged in a first direction and the second sensing pads are arranged in a second direction and vertically staggered with respect to the first sensing pads.
7. The resistive/capacitive hybrid touch device of claim 1, wherein the touch device further comprises:
a second control circuit, comprising:
an enable circuit, comprising:
a control terminal for receiving an enable signal;
an input terminal;
a first output terminal coupled to a resistance sensing circuit; and
a second output end coupled to a capacitance sensing circuit; and
a master selection circuit comprising:
a plurality of input terminals, each input terminal being coupled to the first sensing pads and the second sensing pads of the capacitive selection module, respectively; and
an output terminal coupled to the input terminal of the enable circuit; the main selection circuit controls the coupling relation between the input ends and the output ends according to a main selection control signal.
8. The resistive/capacitive hybrid touch device of claim 7, wherein the touch device further comprises:
a plurality of switches, each switch comprising:
a first end coupled to the corresponding first sensing pad and the second sensing pad; and
a second terminal coupled to the resistance sensing circuit;
the switches receive a switch control signal;
the main selection control signal has a bit number that is an exponent of a binary number of a total number of the plurality of first sensing pads and the plurality of second sensing pads.
9. A driving method of a touch device, the touch device comprising a resistive touch module, a spacer layer and a capacitive touch module, the resistive touch module comprising a first substrate and a first sensing layer, the first sensing layer being disposed on the first substrate, the capacitive touch module comprising a second substrate and a second sensing layer, the second sensing layer being disposed on the second substrate and comprising a plurality of first sensing pads and a plurality of second sensing pads, the spacer layer being disposed between the first sensing layer and the second sensing layer, the method comprising:
applying a voltage to the first sensing layer and detecting a voltage variation of the first sensing layer using the plurality of first sensing pads and the plurality of second sensing pads;
calculating the position of a contact point on the touch device according to the voltage change of the first sensing layer;
grounding the first sensing layer and detecting the change of the capacitance values of the first sensing pads and the second sensing pads; and
and calculating the position of the contact point on the touch device according to the capacitance value changes of the first sensing pads and the second sensing pads.
10. The method of claim 9, wherein applying the voltage to the first sensing layer and using the first sensing pads and the second sensing pads to detect a change in voltage of the first sensing layer applies the voltage to the first sensing layer and using all of the first sensing pads and the second sensing pads to detect a change in voltage of the first sensing layer; or,
the applying a voltage to the first sensing layer and using the first sensing pads and the second sensing pads to detect a voltage change of the first sensing layer sequentially uses a first sensing pad of the first sensing pads and a second sensing pad of the second sensing pads to detect a voltage change of the first sensing layer.
11. The method of claim 9, wherein grounding the first sensing layer is to use the resistive touch module as a shielding layer of the capacitive touch module; grounding the first sensing layer and detecting a change in capacitance values of the first sensing pads and the second sensing pads such that when the first sensing pads and the second sensing pads cannot detect a change in voltage of the first sensing layer, the first sensing layer is grounded and changes in capacitance values of the first sensing pads and the second sensing pads are detected.
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| CN103218098A (en) * | 2013-04-11 | 2013-07-24 | 深圳富泰宏精密工业有限公司 | Hybrid touch input device and hybrid touch input panel |
| CN106933421A (en) * | 2017-03-14 | 2017-07-07 | 西安易朴通讯技术有限公司 | Electronic equipment and its touch control method |
| CN110554807A (en) * | 2019-09-12 | 2019-12-10 | 珠海格力电器股份有限公司 | touch device and electronic equipment |
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| CN101261552A (en) * | 2007-03-09 | 2008-09-10 | 洋华光电股份有限公司 | Combined touch control induction device |
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