CN201607711U - Touch sensing controller - Google Patents
Touch sensing controller Download PDFInfo
- Publication number
- CN201607711U CN201607711U CN2009202600175U CN200920260017U CN201607711U CN 201607711 U CN201607711 U CN 201607711U CN 2009202600175 U CN2009202600175 U CN 2009202600175U CN 200920260017 U CN200920260017 U CN 200920260017U CN 201607711 U CN201607711 U CN 201607711U
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- touch
- interface
- induced signal
- sensing controller
- sensing
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Abstract
The utility model relates to a touch sensing controller, which is electrically connected with a touch keyboard. The touch sensing controller comprises a sensing-signal receiving unit, a signal processing unit and an interface unit. The sensing-signal receiving unit is used for detecting a sensing signal which is generated by the touch keyboard when a finger touches the touch keyboard; the signal processing unit adopts program software to filter, analyze and calculate the sensing signal so to generate contact information reflecting contact position when the finger touches the touch keyboard; the interface unit controls and outputs the contact information to communicate with external world; the sensing-signal receiving unit is electrically connected with the touch keyboard and the signal processing unit which is electrically connected with the interface unit; the sensing-signal receiving unit comprises an RC charging/discharging detecting circuit for detecting the sensing signal. The touch sensing controller can accurately determine the contact position through processing the sensing signals detected by the sensing-signal receiving unit, has strong anti-interference capacity and low cost, is provided with a SPI interface, a 12C interface, a BCD interface and a BIN interface to be convenient to communicate with a main control system, and is easy to realize.
Description
Technical field
The utility model relates to sensing touch technology field, more particularly, relates to a kind of touch sensing controller.
Background technology
At present, main popular touch induction keyboard is pressure-actuated mechanical type keyboard on the market, as metal keyboard, membrane keyboard and conducting resinl keyboard etc., it all is used with the mechanical type sensing controler, but this mechanical type keyboard needs human body directly to contact keyboard, long-time use can cause wearing and tearing, reduces the life-span, and later maintenance cost is higher.In addition, also have a kind of capacitance touch keyboard, be used with the capacitive sensing controller, it does not need human body directly to contact keyboard, has overcome the short-life shortcoming of mechanical type keyboard.But, the element of circuit is more in the capacitive sensing controller, cost is higher, and be subject to the influence of factors such as weather, temperature, humidity, electromagnetic interference (EMI) and human body electric weight, its drift and instability are brought certain restriction for using, simultaneously, its interface circuit is generally only supported single interface, need remodify the software of master control system in use, and need roll up the resource requirement of master control system.
The utility model content
The technical problems to be solved in the utility model is, at the above-mentioned defective of prior art, provides a kind of touch sensing controller.
The technical scheme that its technical matters that solves the utility model adopts is: construct a kind of touch sensing controller, be electrically connected with a touch keyboard, it comprises:
The induced signal receiving element of the induced signal that detection produces when the described touch keyboard of finger touch, by described touch keyboard;
Adopt program software that described induced signal is carried out filtering, the signal processing unit of contact information of contact position when thereby analytical calculation produces the described touch keyboard of a reflection finger touch;
Thereby the interface unit that the described contact information of control output and the external world communicate;
Described induced signal receiving element and touch keyboard are electrically connected, and described induced signal receiving element and described signal processing unit are electrically connected, and described interface unit and described signal processing unit are electrically connected;
Described induced signal receiving element comprises that the RC that detects described induced signal discharges and recharges testing circuit.
Further, in the above-mentioned touch sensing controller described in the utility model, described signal processing unit comprise to described induced signal carry out filtering filtration module, described induced signal is carried out the judge module of analysis and judgement and the computing module that described induced signal is calculated.
Further, in the above-mentioned touch sensing controller described in the utility model, described induced signal receiving element is provided with the connection terminal that connects described touch keyboard.
Further, in the above-mentioned touch sensing controller described in the utility model, described interface unit is provided with the SPI interface of supporting the SPI host-host protocol.
Further, in the above-mentioned touch sensing controller described in the utility model, described interface unit also is provided with supports I
2The I of C host-host protocol
2C interface.
Further, in the above-mentioned touch sensing controller described in the utility model, described interface unit also is provided with the BCD interface.
Further, in the above-mentioned touch sensing controller described in the utility model, described interface unit also is provided with the BIN interface.
Implement touch sensing controller of the present utility model, have following beneficial effect: handle by the induced signal receiving element is detected induced signal, can accurately determine contact position, antijamming capability is stronger, also is provided with SPI interface, I simultaneously
2C interface, BCD interface and BIN interface, convenient and master control system communicates, the lower and more easily realization of cost.
Further, touch sensing controller of the present utility model adopts RC to discharge and recharge testing circuit, and circuit structure is simple, and be not subject to the influence of factors such as weather, temperature, humidity, electromagnetic interference (EMI) and human body electric weight, be difficult for drift, antijamming capability is stronger, and stability better.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structured flowchart of touch sensing controller of the present utility model;
Fig. 2 is the structured flowchart of the signal processing unit of touch sensing controller of the present utility model;
Fig. 3 is the application system figure of touch sensing controller first embodiment of the present utility model;
Fig. 4 is the application system figure of touch sensing controller second embodiment of the present utility model;
Fig. 5 is the application system figure of touch sensing controller the 3rd embodiment of the present utility model.
Embodiment
As shown in Figure 1, be the structured flowchart of touch sensing controller of the present utility model.A touch sensing controller of the present utility model and a touch keyboard are electrically connected and are used, and it comprises induced signal receiving element 1, signal processing unit 2 and interface unit 3.
Wherein, induced signal receiving element 1 induced signal that is used to detect when the described touch keyboard of finger touch, produces by described touch keyboard.
Thereby interface unit 3 is used to control output contact information to be communicated with the external world.
Induced signal receiving element 1, signal processing unit 2 and interface unit 3 order successively are electrically connected, and induced signal receiving element 1 directly links to each other with touch keyboard.
Wherein, induced signal receiving element 1 comprises that the RC that detects described induced signal discharges and recharges testing circuit.
As shown in Figure 2, be the structured flowchart of the signal processing unit of touch sensing controller of the present utility model.Signal processing unit 2 comprise to described induced signal carry out filtering filtration module 21, described induced signal is carried out the judge module 22 of analysis and judgement and the computing module 23 that described induced signal is calculated, filtration module 21, judge module 22 and computing module 23 are linked in sequence successively, and its function all realizes by software program.
As shown in Figure 3, be the application system figure of touch sensing controller first embodiment of the present utility model.In the present embodiment, the touch sensing controller directly embeds master control system 300, and system applies is simpler, and cost is low, dependable performance.
Induced signal receiving element 1 is provided with the connection terminal that connects touch keyboard 100, and touch keyboard 100 is connected with the touch sensing controller by this connection terminal or PCB cabling and communicates.Human body near or when touching touch keyboard 100, will change the electric capacity of touch keyboard 100, this electric capacity difference is described induced signal, the RC in the induced signal receiving element 1 discharges and recharges testing circuit will detect this electric capacity difference.Then, filtration module carries out filtering to this electric capacity difference, follows again, and judge module will carry out analysis and judgement to this electric capacity difference, and computing module calculates this electric capacity difference, finally produces the contact information of a reflection contact position.In this process, by analog to digital conversion, and utilize unique algorithm, from normal moveout correction and backoff algorithm program code, can accurately calculate the contact information of contact position.At last, master control system 300 can be controlled its inner execution module 4 according to this contact information and carry out corresponding action: as a switch opens of controlling this contact position correspondence is crossed and is closed, as a LED who controls this contact position correspondence is luminous or extinguish, as the display device of controlling this contact position correspondence demonstrates this contact information (as X, Y coordinate figure) etc.In the present embodiment, the touch sensing controller directly embeds master control system 300, promptly on broad sense, use this master control system 300 integrated the touch sensing controller 200 that discloses of the utility model.
As shown in Figure 4, be the application system figure of touch sensing controller second embodiment of the present utility model.The application system of institute's careless mistake and shown in Figure 2 basic identical in the present embodiment, difference are to export information to master control system 300 by the interface unit 3 of touch sensing controller 200.In the present embodiment, the function of touch sensing controller 200 realize to adopt the touch-control single-chip microcomputer to finish, the touch-control single-chip microcomputer can provide support the SPI host-host protocol the SPI interface, support I
2The I of C host-host protocol
2C interface, BCD interface and BIN interface, the touch-control single-chip microcomputer is connected with master control system 300 by above-mentioned interface, i.e. and the I/O mouth of touch-control single-chip microcomputer employing self serves as interface unit 3 and communicates with master control system 300.Need to revise the software of master control system 300 and a few resources demand that increases master control system 300 in use.
As Fig. 5 is the application system figure of touch sensing controller 200 the 3rd embodiment of the present utility model.In the present embodiment, touch sensing controller 200, change-over circuit 400 and master control system 300 order successively are connected.Should be mainly used in system and replace the mechanical type keyboard, touch sensing controller 200 is connected with master control system 300 by change-over circuit 400, adopt change-over circuit 400 to replace that mechanical key is connected with the direct of master control system 300 in traditional use-pattern, and do not need to revise the program code of master control system 300.
The above only is a preferred embodiment of the present utility model, not in order to restriction the utility model, all any modifications of being done in spirit of the present utility model and principle, is equal to and replaces or improvement etc., all should be included in the protection domain of the present utility model.
Claims (7)
1. a touch sensing controller is electrically connected with a touch keyboard, it is characterized in that, comprising:
The induced signal receiving element of the induced signal that detection produces when the described touch keyboard of finger touch, by described touch keyboard;
Adopt program software that described induced signal is carried out filtering, the signal processing unit of contact information of contact position when thereby analytical calculation produces the described touch keyboard of a reflection finger touch;
Thereby the interface unit that the described contact information of control output and the external world communicate;
Described induced signal receiving element and touch keyboard are electrically connected, and described induced signal receiving element and described signal processing unit are electrically connected, and described interface unit and described signal processing unit are electrically connected;
Described induced signal receiving element comprises that the RC that detects described induced signal discharges and recharges testing circuit.
2. touch sensing controller according to claim 1, it is characterized in that, described signal processing unit comprise to described induced signal carry out filtering filtration module, described induced signal is carried out the judge module of analysis and judgement and the computing module that described induced signal is calculated.
3. touch sensing controller according to claim 1 is characterized in that, described induced signal receiving element is provided with the connection terminal that connects described touch keyboard.
4. touch sensing controller according to claim 3 is characterized in that, described interface unit is provided with the SPI interface of supporting the SPI host-host protocol.
5. touch sensing controller according to claim 4 is characterized in that, described interface unit also is provided with supports I
2The I of C host-host protocol
2C interface.
6. touch sensing controller according to claim 5 is characterized in that described interface unit also is provided with the BCD interface.
7. touch sensing controller according to claim 6 is characterized in that described interface unit also is provided with the BIN interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202600175U CN201607711U (en) | 2009-11-02 | 2009-11-02 | Touch sensing controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202600175U CN201607711U (en) | 2009-11-02 | 2009-11-02 | Touch sensing controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201607711U true CN201607711U (en) | 2010-10-13 |
Family
ID=42952415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202600175U Expired - Lifetime CN201607711U (en) | 2009-11-02 | 2009-11-02 | Touch sensing controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201607711U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102609145A (en) * | 2012-02-16 | 2012-07-25 | 上海浩元集成系统有限公司 | Penetration type control device of touch screen |
| CN110460327A (en) * | 2019-08-15 | 2019-11-15 | 上海科世达-华阳汽车电器有限公司 | A kind of touch-sensitive buttons |
-
2009
- 2009-11-02 CN CN2009202600175U patent/CN201607711U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102609145A (en) * | 2012-02-16 | 2012-07-25 | 上海浩元集成系统有限公司 | Penetration type control device of touch screen |
| CN110460327A (en) * | 2019-08-15 | 2019-11-15 | 上海科世达-华阳汽车电器有限公司 | A kind of touch-sensitive buttons |
| CN110460327B (en) * | 2019-08-15 | 2023-11-24 | 上海科世达-华阳汽车电器有限公司 | Touch-sensitive button |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101013 |
|
| CX01 | Expiry of patent term |