CN103186301A - Touch sensing device and programmable controller thereof - Google Patents

Abstract

A touch sensing device and a programmable controller thereof are provided, wherein the programmable controller comprises a plurality of universal pins, a control circuit and a plurality of switching units. The control circuit records the corresponding relation defined between the universal pins and the sensing lines and the driving lines of the touch panel. The switching units are correspondingly connected with the universal pins and respectively receive a switching signal generated by the control circuit according to the corresponding relation, wherein each switching unit selectively connects the corresponding connected universal pin to the sensing circuit or the driving circuit according to the received switching signal. The programmable controller can enable a designer of the touch sensing device to set the corresponding relation between the plurality of universal pins and the plurality of driving lines and the plurality of sensing lines, so that the programmable controller can be suitable for touch panels with different specifications.

Description

Touch sensing device and its programmable controller

technical field

The present invention relates to a touch sensing device, in particular to a programmable controller and a touch sensing device using the same.

Background technique

With the advancement of semiconductor and circuit design technologies, touch sensing devices have been gradually used as man-machine interfaces in handheld devices or other electronic devices, thereby receiving touch input signals generated by the touch sensing devices.

Please refer to FIG. 1A , which is a functional block diagram of a traditional touch sensing device. The touch sensing device 10 includes a touch panel 101 and a controller 102 , wherein the touch panel 101 is, for example, a projected capacitive touch panel. The touch panel 101 includes a plurality of driving lines D0-D27 and a plurality of sensing lines S0-S14, wherein the driving lines D0-D27 and the sensing lines S0-S14 are crossed to form a sensing electrode array, and each driving line The intersection points of D0-D27 and each of the sensing lines S0-S14 are coupled to form a capacitor (not shown). In addition, the driving lines D0-D27 and the sensing lines S0-S14 are further correspondingly connected to the driving pins D0'-D27' and the sensing pins S0'-S14' of the controller 102 through wires. In this way, the controller 102 can sequentially generate driving signals to the driving lines D0-D27, and sequentially receive the sensing signals of the sensing lines S0-S14, and then calculate each The capacitance of the capacitor changes to determine the area touched by the user on the touch panel 101 .

In the design of the traditional touch-sensing device 10 , the specifications of the touch panel 101 (eg, panel size, sensing resolution, etc.) are first met, and then a suitable controller 102 is selected for matching. However, the controller 102 has specific specifications at the time of design, that is, the pin positions and numbers of the driving pins D0 ′˜D27 ′ and the sensing pins S0 ′˜S14 ′ of the controller 102 are fixed after the design is completed. It is fixed, so each controller is not easy to apply to touch panels with different specifications, which creates more application restrictions. In this regard, the manufacturer of the controller usually reserves the sensing pins and/or the driving pins as much as possible during the design, in order to support more kinds of touch panels with different specifications. For example, the controller 102 designed in FIG. 1A can support a touch panel with a maximum of 16 sensing lines and 32 driving lines.

Although the above-mentioned design of reserving more sensing pins and/or driving pins can make the controller have better applicability, overall, the pin positions and positions of the sensing pins and driving pins of the controller The number is still fixed, so the application flexibility is still insufficient. Please refer to FIG. 1B . FIG. 1B is a functional block diagram of another traditional touch sensing device, which is used to illustrate an actual situation that the controller cannot support the touch panel. The controller 112 in FIG. 1B has 16 sensing pins S0'~S15' and 32 driving pins D0'~D31', but the touch panel 111 has 18 sensing lines S0~S17 and 27 driving pins. Lines D0-D26. In this way, the controller 112 will form sensing pins S0 ′˜S15 ′ that cannot cope with all the sensing lines S0 ˜ S17 of the touch panel 111 , while the driving pins D0 ′˜D31 ′ are more than the touch panel 111 Situations where all the driving lines D0-D26 cannot be applied.

Furthermore, since the positions of the sensing pin and the driving pin of the traditional controller are fixed, there is often a certain gap when performing the circuit layout of the wires between the controller and the driving line and sensing line of the touch panel. Difficulty. Please refer to FIG. 1C , which is a functional block diagram of another conventional touch sensing device. As shown in FIG. 1C , the sensing lines S0-S7 and S8-S14 of the touch panel 121 are located on the upper right side and the lower left side of the touch panel 121 respectively, and are respectively connected to the sensing pin S0' of the controller 122. ~S7' and sensing pins S8'~S14', the wires used to connect the sensing pins S0'~S14' and the sensing lines S0~S14 on the circuit board or flexible board will form a cross-wiring layout . Therefore, the only way to solve the problem of cross-wiring is by adding layers of circuit boards or soft boards during design. However, because the signal transmitted by the wires is an analog signal with a small amount of signal, the crossed wires are still easy to interfere with each other, causing the electrical performance of the entire touch sensing device to decline, and even serious errors may occur.

Contents of the invention

The purpose of the present invention is to provide a touch sensing device and its programmable controller, which allows the designer of the touch sensing device to set multiple common pins of the programmable controller. The corresponding relationship between the bit and the multiple driving lines and multiple sensing lines of the touch panel allows the programmable controller to flexibly set each general-purpose pin as a driving pin or a sensing pin to cope with different specifications The touch panel can effectively optimize the circuit layout between the touch panel and the programmable controller.

The invention provides a programmable controller, wherein the programmable controller includes a plurality of general pins, a control circuit and a plurality of switching units. The control circuit is used for recording the corresponding relationship defined between the plurality of common pins and the plurality of sensing lines and the plurality of driving lines of a touch panel. A plurality of switching units are correspondingly connected to a plurality of common pins, and respectively receive a switching signal generated by the control circuit according to the corresponding relationship. Each switching unit selectively connects the corresponding connected common pin to the sensing circuit or the driving circuit according to the received switching signal.

According to the above concept, the touch sensing device includes a touch panel and the above-mentioned programmable controller. The touch panel has multiple sensing lines and multiple driving lines.

According to the above idea, the control circuit further controls the switching operations of the plurality of switching units by controlling the timing of generating the switching signals.

According to the above idea, when the control circuit controls any general-purpose pin corresponding to the drive line to be selectively connected to the drive circuit to transmit the drive signal generated by the drive circuit to the correspondingly connected drive line, the control circuit further controls all of the pins in sequence. The general-purpose pin corresponding to the sensing line is selectively connected to the sensing circuit, so as to transmit the sensing signal coupled to the corresponding connected sensing line to the sensing circuit.

According to the above concept, the control circuit further simultaneously controls two switching units correspondingly connected to the sensing line to be selectively connected to the two input terminals of the sensing circuit.

According to the above concept, each switching unit further selectively connects the corresponding connected common pin to the reference voltage terminal or the high impedance terminal according to the received switching signal.

According to the above concept, each switch unit adopts a combination of multiple switches, a selector or a multiplexer design.

According to the above concept, the programmable controller is a single-chip system integrating a control circuit, a plurality of switching units, a driving circuit and a sensing circuit.

According to the above idea, the control circuit includes a storage unit, a read/write control unit and a signal generating unit. The read-write control unit is connected to the storage unit, and is used for receiving the corresponding relationship and recording the corresponding relationship in the storage unit. The signal generating unit is connected to the read-write control unit, obtains the corresponding relationship from the storage unit through the read-write control unit, and generates the plurality of switching signals according to the corresponding relationship.

To sum up, the programmable controller of the touch sensing device provided by the embodiment of the present invention can respond to touch panels of various specifications, increase the application flexibility of the programmable controller, and improve the performance of the programmable controller. Utilization of all common pins. In addition, the functions of each general-purpose pin of the programmable controller (drive or Sensing), so as to eliminate the trouble and reduce the difficulty of circuit layout on the circuit board or flexible board, so that the wires used to connect the touch panel and the programmable controller on the circuit board or flexible board can avoid crossing line situation.

In order to enable a further understanding of the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention, but these descriptions and accompanying drawings are only used to illustrate the present invention, rather than to claim the rights of the present invention any limitations on the scope.

Description of drawings

FIG. 1A is a functional block diagram of a conventional touch sensing device.

FIG. 1B is a functional block diagram of another conventional touch sensing device.

FIG. 1C is a functional block diagram of another conventional touch sensing device.

FIG. 2 is a functional block diagram of a touch sensing device provided by an embodiment of the present invention.

FIG. 3A is a detailed schematic diagram of a touch sensing device provided by an embodiment of the present invention.

FIG. 3B is a detailed schematic diagram of a touch sensing device provided by another embodiment of the present invention.

FIG. 4 is a functional block diagram of a control circuit according to an embodiment of the present invention.

Fig. 5A is a schematic diagram of the corresponding relationship recorded by the storage unit according to the embodiment of the present invention.

FIG. 5B is a schematic diagram of the corresponding relationship recorded by the storage unit according to another embodiment of the present invention.

Wherein, the reference signs are explained as follows:

10, 11, 12, 20: touch sensing device

101, 111, 121, 201: touch panel

102, 112, 122: Controller

202: Programmable Controller

2021, 2021’: Sensing circuits

2022, 2022’, 40: Control circuits

2023: Drive circuits

41: storage unit

42: Read and write control unit

43: Signal generating unit

D0～D39: drive line

D0’～D31’: Drive pins

I+, I-: input terminal

G0～G63: General pins

S0～S21: Sensing line

S0'～S15': Sensing pins

SW0～SW63, SW0’～SW63’: switching unit

Vref: reference voltage terminal

Detailed ways

Please refer to FIG. 2 . FIG. 2 is a functional block diagram of a touch sensing device provided by an embodiment of the present invention. The touch sensing device 20 includes a touch panel 201 and a programmable controller 202 . The touch panel 201 of this embodiment includes a plurality of sensing lines S0-S21 and driving lines D0-D39, wherein the sensing lines S0-S21 and the driving lines D0-D39 are electrically insulated and cross to form a sensing line. The electrode array provides the function of touch sensing. In addition, different from traditional controllers, the programmable controller 202 includes a plurality of general-purpose pins G0-G63, so that the designer of the touch sensing device 20 can follow the conformity between the touch panel 201 and the programmable controller 202 The circuit layout of routing rules (such as: avoiding crossing routing, sensing wires and driving wires, etc.) circuit layout to define the functions of the general pins G0-G63 of the programmable controller 202 ( drive or sense). In other words, any of the general pins G0˜G63 can be a sensing pin or a driving pin as defined by the designer.

In the embodiment of FIG. 2 , the circuit layout is considered according to the specifications of the touch panel 201 (such as: panel size, ratio, sensing resolution, outgoing positions of driving lines and sensing lines, etc.), so as to avoid crossover In the case of wires, the sensing lines S0～S10, S11～S21 of this embodiment are respectively connected to the general-purpose pins G0-G10, G61-G51 through wires, and the driving lines D0-D39 are respectively connected to the general-purpose pins through wires. The pins are G11~G50. In this regard, the designer can further define the functions of the general-purpose pins G0-G63 of the programmable controller 202 according to the completed circuit layout, and define the general-purpose pins G0-G10 and G61-G51 respectively as The general pins G11-G50 are respectively defined as the driving pins for transmitting the driving signals to the driving lines D0-D39 to receive the sensing signals of the sensing lines S0-S10, S11-S21.

In addition, in order to avoid cross wiring in this embodiment, the general-purpose pins G0-G63 of the programmable controller 202 are not connected to the sensing lines S0-S21 and driving lines of the touch panel 201 correspondingly in the order of numbering. D0-D39, therefore the programmable controller 202 can further manage all the general-purpose pins G0-G63 according to the corresponding relationship defined between the general-purpose pins G0-G63 and the sensing lines S0-S21 and driving lines D0-D39 operation, so as to effectively control the functions of the sensing lines S0-S21 and the driving lines D0-D39 of the touch panel 201. It should be noted that the corresponding relationship can be designed and presented in the form of a comparison table, for example, however, the way of presenting the corresponding relationship is not intended to limit the present invention.

In actual operation, the programmable controller 202 will sequentially transmit the drive signals to the correspondingly connected drive lines D0-D39 through the general-purpose pins G11-G50 defined as the drive pins, and any one of the drive pins defined as the drive pins When the general-purpose pins G11-G50 transmit the drive signal to the correspondingly connected drive lines D0-D39, the programmable controller 202 also sequentially passes through all the general-purpose pins G0-G10, G61-G51 defined as sensing pins to receive sensing signals. In this way, the programmable controller 202 can receive the sensing signals of all the sensing lines S0-S21 for each of the driving lines D0-D39, thereby completing the scanning of the entire sensing electrode array, and according to all the received sensing signals The area touched by the user on the touch panel 201 is determined by using the test signal. Incidentally, the order in which the programmable controller 202 scans the sensing electrode array is not limited by this embodiment, and the programmable controller 202 can transmit driving signals and receive sensing signals in a user-defined order .

In addition, compared with the number of driving pins and the number of sensing pins of the traditional controller must be greater than the number of driving lines and the number of sensing lines of the touch panel, the programmable controller 202 of this embodiment has greater flexibility , can be applied to any touch panel whose total number of driving lines and sensing lines is less than or equal to the number of common pins of the programmable controller 202 . For example, the programmable controller 202 of this embodiment can be applied to touch panels of various specifications with the total number of driving lines and sensing lines within 64.

In order to further illustrate the circuit structure and operation of the touch sensing device 20, please refer to FIG. 3A based on the structure of FIG. A part of the sensing electrode array formed by crossing four driving lines D0-D3 and four sensing lines S0-S3 of the touch panel 201 is partially drawn, wherein each driving line D0-D3 and each sensing line S0-S3 The crossover point of S3 is coupled to form a capacitor.

The programmable controller 202 includes a sensing circuit 2021 , a control circuit 2022 , a driving circuit 2023 and a plurality of switching units SW0 - SW63 correspondingly connected to the general pins G0 - G63 . Wherein, the control circuit 2022 is used to record the corresponding relationship between the defined general pins G0-G63, the sensing lines S0-S21 and the driving lines D0-D39. The switching units SW0-SW63 are connected to the control circuit 202, and correspondingly receive a switching signal G0S[0:2]-G63S[0:2] generated by the control circuit 202 according to the corresponding relationship, wherein each switching unit SW0-SW63 is According to the received switching signals G0S[0:2]-G63S[0:2], the corresponding connected general-purpose pins G0-G63 are selectively connected to the driving circuit 2023, the sensing circuit 2021 or a reference voltage terminal Vref (e.g. ground terminal, voltage source). In addition, the reference voltage terminal Vref can be removed or replaced by a high-impedance terminal in other implementation manners. Furthermore, the driving circuit 2023 is used to generate a driving signal (such as a sine wave signal). The sensing circuit 2021 is used to receive sensing signals, and judge the area touched by the user on the touch panel 201 according to all the received sensing signals.

In actual design, the control circuit 2022 can further control the switching signals G0S[0:2]~G63S[0:2] in addition to generating the switching signals G0S[0:2]~G63S[0:2] according to the corresponding relationship. ] to control the operation of the switching connections of the switching units SW0-SW63. In other words, under the condition that there is a corresponding relationship, the control circuit 2022 can control the transmission of driving signals to the general-purpose pins G11-G50 defined as driving pins and the custom-defined sensing pins according to the scanning sequence required by the actual design. The general-purpose pins G0~G10, G61~G51 of the bit receive the order of the sensing signal.

For example, the control circuit 2022 controls the switching units SW11-SW50 correspondingly connected to the driving lines D0-D39 to selectively connect to the driving circuit 2023 one by one, so as to sequentially transmit the driving signals generated by the driving circuit 2023 to the correspondingly connected driving lines D0-D39, and when the control circuit 2022 controls any of the switching units SW11-SW50 correspondingly connected to the driving lines D0-D39 to be selectively connected to the driving circuit 2023, the control circuit 2022 also sequentially controls all the switching units correspondingly connected to the sensing lines The switching units SW0-SW10, S61-S51 of the lines S0-S21 are selectively connected to the sensing circuit 2021, so as to sequentially transmit the sensing signals of the correspondingly connected sensing lines S0-S21 to the sensing circuit 2021, so that The sensing circuit 2021 is able to receive the sensing signals of all the sensing lines S0 - S21 for the current driving line D0 - D39 .

It is worth mentioning that, in the embodiment of FIG. 3A , the sensing circuit 2021 uses a single-ended sensing method to obtain the sensing signal. Therefore, in this embodiment, the switching units SW0-SW63 are respectively designed as a combination of three switching switches, and the corresponding connections are connected according to the signal values of the switching signals G0S[0:2]-G63S[0:2] respectively. The general-purpose pins G0˜G63 are selectively connected to the driving circuit 2023 , the sensing circuit 2021 or the reference voltage terminal Vref. Among them, the programmable controller 202 is preset to control all the switching units SW0-SW63 to be connected to the reference voltage terminal Vref, so that when the switching units SW0-SW63 are not controlled to be connected to the sensing circuit 2021 or the driving circuit 2022, all corresponding connections The general-purpose pins G0-G63 can all be maintained at a voltage value, so as to prevent the driving lines D0-D39 and sensing lines S0-S21 correspondingly connected to the switching units SW0-SW63 from being easily disturbed and forming a floating state.

In this embodiment, corresponding to the embodiment of FIG. 2, in FIG. 3A, the switching units SW0-SW3 (or general-purpose pins G0-G3) are respectively connected to the sensing lines S0-S3, and the switching units SW11-SW14 ( Or general-purpose pins G11-G14) are correspondingly connected to the driving lines D0-D3. In addition, the switching signals G0S[0:2]˜G63S[0:2] are signals of three bits (3 bits). For example, when the signal value=[001], it represents the selective connection to the driving circuit 2023; when the signal value=[010], it represents the selective connection to the sensing circuit 2021; and when the signal value=[100] , represents the optional connection to the reference voltage terminal. However, it should be noted that the implementations of the switching units SW0 - SW63 and the types of the switching signals G0S[0:2] - G63S[0:2] are not intended to limit the present invention. In another embodiment, each switching unit SW0 - SW63 can also adopt a multiplexer or a selector design.

Please refer to FIG. 3B . FIG. 3B is a detailed circuit diagram of a touch sensing device according to another embodiment of the present invention. The structure and operation of the embodiment of FIG. 3B are substantially the same as the embodiment of FIG. 3A , the difference is that the sensing circuit 2021' of FIG. 3B uses a differential sensing method to obtain sensing signals. The sensing circuit 2021' adopts a dual-channel design and has two input terminals I+, I-. In addition, each switching unit SW0'˜SW63' can be, for example, a combination of four switches, wherein the four switches are used to connect to the two input terminals I+ of the driving circuit 2023 and the sensing circuit 2021' respectively. , I- and the reference voltage terminal Vref. In contrast, the switching signals GOS[0:3]˜G63S[0:3] generated by the control circuit 2022' are designed as four-bit (4bits) signals. For example, when the signal value=[0001], it represents the selective connection to the drive circuit 2023; when the signal value=[0010], it represents the selective connection to the input terminal I+ of the sensing circuit 2021'; when the signal value= [0100], it means selectively connected to the input terminal I- of the sensing circuit 2021′; and when the signal value=[1000], it means selectively connected to the reference voltage terminal Vref.

In this way, in operation of this embodiment, when the control circuit 2022' controls any of the switching units SW11'-SW50' corresponding to the drive lines D0-D39 to be selectively connected to the drive circuit 2023, the control circuit 2022' is Sequentially control all the switching units SW0'~SW10', S61'~S51' corresponding to the sensing lines S0~S21, and control two switching units SW0' corresponding to the sensing lines S0~S21 at the same time ˜SW10 ′, S61 ′˜S51 ′ are selectively connected to two input terminals I+, I− of the sensing circuit 2021 ′ for differential sensing.

Please refer to FIG. 4 , which is a functional block diagram of a control circuit according to an embodiment of the present invention. The control circuit 40 can be used to implement, for example, the control circuits 2022, 2022' of FIG. 3A and FIG. 3B. The control circuit 40 includes a storage unit 41 , a read/write control unit 42 and a signal generating unit 43 . The read/write control unit 42 is connected to the storage unit 41 for receiving the corresponding relationship between the common pins defined by the designer of the touch sensing device and the sensing lines and driving lines, and recording the corresponding relationship in the storage unit 41 . The signal generation unit 43 is connected to the read-write control unit 42 to obtain the corresponding relationship recorded in the storage unit 41 through the read-write control unit 42, and generate switching signals G0S-G63S according to the corresponding relationship to control FIG. 3A and FIG. 3B The operation of all switching units SW0-SW63, SW0'-SW63', and then achieve the function of managing all general-purpose pins G0-G63.

It should be noted that the switching signals G0S˜G63S will be different according to the actually designed switching unit. For example, when the switching unit is the switching unit SW0-S63 as shown in FIG. 3A, the switching signals G0S-G63S are the switching signals G0S[0:2]-G63S[0:2] as shown in FIG. 3A; when the switching unit is When the switching units SW0 ′˜S63 ′ are like FIG. 3B , the switching signals G0S˜G63S are like the switching signals GOS[0:3]˜G63S[0:3] of FIG. 3B .

Next, please refer to FIG. 2 , FIG. 4 and FIG. 5A correspondingly. FIG. 5A is a schematic diagram of the corresponding relationship recorded by the storage unit according to the embodiment of the present invention. The schematic diagram of FIG. 5A is used to explain the corresponding relationship of the general pins G0 - G61 of the programmable controller 202 by using the driving lines D0 - D39 and the sensing lines S0 - S21 of the touch panel 201 as a reference. In terms of design, the storage unit 41 will be informed how many driving lines D0-D39 and sensing lines S0-S21 the touch panel 201 has, so as to store the information of the number of driving lines and the number of sensing lines. The general-purpose pins G0-G10 and G61-G51 connected to the sensing lines S0-S21 are sequentially recorded in the temporary register at the address 0x0000-0x0015 of the storage unit 41, and the general-purpose pins G11-G11-G51 connected to the driving lines D0-D39 G50 is sequentially recorded in the temporary registers at addresses 0x0016-0x003D of the storage unit 41 . For example, in FIG. 5A , the general-purpose pin connected to the sensing line S21 is G51, so the value of the general-purpose pin G51 will be recorded in the register at address 0x0015; and the general-purpose pin connected to the driving line D38 is G49, so the value of the general-purpose pin G49 will be recorded in the scratchpad at address 0x003C.

Please refer to FIG. 2 , FIG. 4 and FIG. 5B . FIG. 5B is a schematic diagram of the corresponding relationship recorded in the storage unit according to another embodiment of the present invention. Different from the embodiment in FIG. 5A , the schematic diagram in FIG. 5B is used to illustrate that the general-purpose pins G0-G63 of the programmable controller 202 are used as a reference to record the driving lines D0-D39 and the sensing line S0 of the touch panel 201 correspondingly. Correspondence between ~S21. The storage unit 41 is used to store information on the number of common pins of the programmable controller 202 . Furthermore, the temporary registers with addresses 0x0000-0x003F of the storage unit 41 are used to sequentially record the connection states of the general-purpose pins G0-G63 (such as: connecting the sensing lines S0-S21, connecting the driving lines D0-D39 or empty wiring ). For example, in FIG. 5B, the general-purpose pin G51 is correspondingly connected to the sensing line S21, so the value of the sensing line S21 will be recorded in the register at address 0x0033; and the general-purpose pin G49 is correspondingly connected to the driving line D38, so the value of the drive line D38 will be recorded in the register at address 0x0031.

It should be noted that the recording method of the corresponding relationship disclosed in FIG. 5A and FIG. 5B is not intended to limit the present invention, and the capacity of the storage unit 41 is related to the number of sensing lines, the number of driving lines, and the number of common pins. .

In addition, it is worth mentioning that the programmable controller in the above embodiments adopts a single-chip system design to directly integrate a driving circuit, a sensing circuit, a control circuit and a plurality of switching units. However, in other implementations, the driving circuit and the sensing circuit may not be integrated with multiple switching units and control circuits in the same chip. In other words, in other embodiments, the programmable controller may only include a plurality of switching units and control circuits, and the driving circuit and sensing circuit are independent of the programmable controller.

To sum up, the embodiments of the present invention can increase the application flexibility of the programmable controller and improve the utilization rate of all general-purpose pins of the programmable controller. The designer of the touch sensing device can properly set each general-purpose pin of the programmable controller according to the outlet position of the sensing line and the driving line of the actual touch panel and the general-purpose pin position of the programmable controller functions, and then record the corresponding relationship between the common pins and the sensing lines and driving lines in the programmable controller. In this way, the programmable controller can control the order in which the driving circuit transmits the driving signal to the driving line and the order in which the sensing circuit receives the sensing signal from the sensing line according to the corresponding relationship. In addition, the function of customizing general-purpose pins provided by the programmable controller can eliminate the troubles and reduce the difficulty of circuit layout on circuit boards or flexible boards, allowing circuit boards or flexible boards to be used to connect touch The wiring between the panel and the programmable controller can have a circuit layout conforming to wiring specifications (for example, avoiding cross wiring).

The above descriptions are only examples of the present invention, and are not intended to limit the patent scope of the present invention.

Claims (15)

1. a programmable controller is characterized in that, comprising:

A plurality of general pin position;

One control circuit is in order to a corresponding relation that defines between many sense wires recording those general pin positions and a contact panel and many drive wires; And

A plurality of switch units, corresponding those general pin positions that connect, and receive this control circuit respectively and one switch signal according to what this corresponding relation produced, wherein each switch unit optionally is connected to a sensing circuit or one drive circuit according to this switching signal that receives with the general pin position of the corresponding connection of institute.

2. programmable controller as claimed in claim 1 is characterized in that, this control circuit is further controlled the switching running of those switch units by the generation sequential of controlling this switching signal.

3. programmable controller as claimed in claim 2, it is characterized in that, control the switch unit that arbitrary correspondence is connected in drive wire when this control circuit and optionally be connected to this driving circuit, with transmit that this driving circuit produces one when driving the drive wire that signal to this correspondence connects, this control circuit is further controlled the switch unit that all correspondences are connected in sense wire in regular turn and optionally is connected to this sensing circuit, to transmit a sensing signal that sense wire coupling that this correspondence connects produces to this sensing circuit.

4. programmable controller as claimed in claim 3 is characterized in that, this control circuit is further controlled two input ends that switch unit that two correspondences are connected in sense wire optionally is connected to this sensing circuit simultaneously.

5. programmable controller as claimed in claim 1 is characterized in that, each switch unit further optionally is connected to a reference voltage end or a high impedance end according to this switching signal of receiving with this general pin position of the corresponding connection of institute.

6. programmable controller as claimed in claim 1 is characterized in that, each switch unit adopts the design of combination, a selector switch or a multiplexer of a plurality of change-over switches.

7. programmable controller as claimed in claim 1 is characterized in that, described control circuit comprises:

One storage unit;

One read-write control unit connects this storage unit, is used for receiving this corresponding relation, and this corresponding relation is recorded in this storage unit; And

One signal generation unit connects this read-write control unit, and obtains this corresponding relation of this unit records by this read-write control unit, and produces those switching signals according to this corresponding relation.

8. a touch sensing device is characterized in that, comprising:

One contact panel comprises many sense wires and many drive wires;

One programmable controller comprises;

A plurality of general pin position;

One control circuit is in order to a corresponding relation that defines between those sense wires of recording those general pin positions and this contact panel and those drive wires; And

A plurality of switch units, corresponding those general pin positions that connect, and receive this control circuit respectively and one switch signal according to what this corresponding relation produced, wherein each switch unit optionally is connected to a sensing circuit or one drive circuit according to this switching signal that receives with the general pin position of the corresponding connection of institute.

9. touch sensing device as claimed in claim 8 is characterized in that, described control circuit is further controlled the switching running of those switch units by the generation sequential of controlling this switching signal.

10. touch sensing device as claimed in claim 9, it is characterized in that, control the general pin position that arbitrary correspondence is connected in drive wire when this control circuit and optionally be connected to this driving circuit, with transmit that this driving circuit produces one when driving the drive wire that signal to this correspondence connects, this control circuit is further controlled the general pin position that all correspondences are connected in sense wire in regular turn and optionally is connected to this sensing circuit, is sent to this sensing circuit to transmit the sensing signal that sense wire coupling that this correspondence connects produces.

11. touch sensing device as claimed in claim 10 is characterized in that, this control circuit is further controlled two input ends that switch unit that two correspondences are connected in sense wire optionally is connected to this sensing circuit simultaneously.

12. touch sensing device as claimed in claim 8 is characterized in that, each switch unit further optionally is connected to a reference voltage end or a high impedance end according to this switching signal of receiving with this general pin position of the corresponding connection of institute.

13. touch sensing device as claimed in claim 8 is characterized in that, each switch unit adopts the design of combination, a selector switch or a multiplexer of a plurality of change-over switches.

14. touch sensing device as claimed in claim 8 is characterized in that, this programmable controller is the single-chip system of this control circuit of integration, those switch units, this driving circuit and this sensing circuit.

15. touch sensing device as claimed in claim 8 is characterized in that, this control circuit comprises:

One storage unit;

One read-write control unit connects this storage unit, is used for receiving this corresponding relation, and this corresponding relation is recorded in this storage unit; And

One signal generation unit connects this read-write control unit, and obtains this corresponding relation of this unit records by this read-write control unit, and produces those switching signals according to this corresponding relation.

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