CN1251053C - Keyboard signal sensor - Google Patents
Keyboard signal sensor Download PDFInfo
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- CN1251053C CN1251053C CN 03121054 CN03121054A CN1251053C CN 1251053 C CN1251053 C CN 1251053C CN 03121054 CN03121054 CN 03121054 CN 03121054 A CN03121054 A CN 03121054A CN 1251053 C CN1251053 C CN 1251053C
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Abstract
The present invention discloses a keyboard signal sensor, which is characterized in that the keyboard signal sensor comprises A, a keyboard signal input device and B, a keyboard signal processing device, wherein the keyboard signal input device comprises at least one internal circuit for sensing key pressing operation; the internal circuit is connected to the keyboard signal processing device which is used for sensing key pressing operation of a sharing key; a signal is produced and is sent to the keyboard signal processing device; the keyboard signal processing device is connected to each keyboard interface and is used for receiving and processing a key scanning signal transmitted by the keyboard signal input device; keyboard signals are transmitted to each keyboard interface. The present invention has the advantages that a plurality of different device keyboards can be shared, the utilization efficiency of the keyboard is greatly improved, and different products can be combined for using.
Description
Technical field
The invention belongs to electronic technology and field of computer technology, relate in particular to a kind of keyboard signal sensing device of realizing that a plurality of keyboards are shared.
Background technology
Along with IT industry wave of digitalization the increasingly mature of fields of society and various electronics applications that deepen continuously, also be used more and more as the keyboard of various IT and the indispensable part of electronic product.In the prior art, most keyboards all are to adopt to connect this mode of scan code of discerning with the both direction signal.The specific implementation method is: be the contact point of keyboard with the intersection point between horizontal wire and the vertical wires, when button is pressed, horizontal wire and vertical wires are connected on this contact point, and then this contact point is an off-state in the ordinary course of things, and horizontal wire and vertical wires disconnect mutually.Two direction leads produce communications signals and send to the keyboard signal treating apparatus when contacting points position contacts on the lead, the keyboard signal treating apparatus is discerned key position according to the signal on the two direction leads and is converted to the signal output of respective type.The keyboard that also has independent press-key structure form equally, the corresponding button of I/O mouth needs and the as many I/O mouth of button thus on this keyboard.
Below in conjunction with accompanying drawing, under the description line column matrix scan mode, the principle of work of the key board unit of computing machine and phone.
Be illustrated in figure 1 as the principle schematic of computer keyboard device, utilize the process of this keyboard identification actuation of keys as follows:
Each vertical wires is high level 1 by pull-up resistor with drawing on its output voltage, at first export a low level 0 from keyboard controller HOUT0, other HOUT1～HOUT6 then export high level 1, at this moment, when on the HOUT0 output lead is expert at, having button to press, the vertical wires of respective column and horizontal wire are connected, low level output 0 on the HOUT0 can pull into low level 01 time with the high level of this row vertical wires output, keyboard controller reads the level signal VIN0～VIN7 of each vertical wires input, by wherein being pressed for low level input signal VINn judges the button that obtains first row n row, if a plurality of low level signals are arranged, the button of then representing a plurality of respective column of first row is pressed, if all be high level signal, represents that then this row does not have button to be pressed, so far, first line scanning is finished; Then, keyboard controller then keeps high level 1 in HOUT1 output low level 0 in other outputs, and the same scan mode of first row is finished the scanning to second row, which button that obtains second row is pressed; The rest may be inferred, finishes the scanning to all row of keyboard, thereby obtain the situation of pressing of each button on the keyboard.More than scanning process circulation of each row is carried out, and the round-robin frequency is very high, thereby guarantees that any actuation of keys on the keyboard can be scanned by keyboard controller.Keyboard controller calculates keyboard position according to scanning result, exports corresponding scan code and scan code.
Be illustrated in figure 2 as the principle schematic of telephone keypad, the process of telephone keypad identification keyboard is as follows:
Telephone keypad generally all adopts dual-tone multifrequency decoding (DTMF), after pressing next key on the telephone keypad, telephone control circuit need produce two correlated frequencies and send to switch identification, so telephone keypad is discerned button with warp and parallel, each parallel ABCD represents four frequencies as shown in the figure respectively, and each warp WXYZ represents four frequencies as shown in the figure respectively.When the button of warp and weft contact point was pressed, warp and weft was connected, and the frequency of sending this warp and this parallel simultaneously is to switch, and switch is finished identification to key position according to these two frequencies.
Except above-described rank scanning mode, also there are scan modes such as line reversal process, the method for transition matrices in the prior art, the effect of its realization is identical with aforesaid way.And for the keyboard of independent press-key structure form, the principle of its realization is with identical as mentioned above, and the keyboard that difference only is independent press-key structure form is with the corresponding button of an I/O mouth.
For other IT product or electronic product of great majority, also cardinal principle is identical for the keyboard principle of work of its keyboard principle of work and aforementioned calculation machine and phone.
In the prior art, the keyboard of each IT product and electronic product is in separate state, can't realize connecting each other and share each other, realizes that power has played the effect of restriction thereby combine for IT product and electronic product.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of keyboard signal sensing device of realizing that a plurality of heterogeneitys, purposes, characteristic keyboard are shared.
The present invention is a kind of keyboard signal sensing device, it is characterized in that this device comprises:
A, keyboard signal input media, the internal circuit that comprises at least one perception actuation of keys in this device, this circuit is connected to the keyboard signal treating apparatus, and the actuation of keys of button is shared in this keyboard signal input media perception, produces signal and is sent to the keyboard signal treating apparatus;
B, keyboard signal treating apparatus, this device is connected to each keyboard interface, receive and handle the key scan signal that the keyboard signal input media sends, obtain using the respective type signal of each equipment of this keyboard by this signal, and resulting each signal is exported to respectively in the corresponding device that uses this keyboard.
Wherein, described internal circuit is ranks matrix-style circuit or independent press-key structure circuit.
Wherein, comprise in the described keyboard signal input media that the specific implementation of the internal circuit of at least one perception actuation of keys is:
Comprise an internal circuit in the keyboard signal input media.
Wherein, comprise in the described keyboard signal input media that the specific implementation of the internal circuit of at least one perception actuation of keys is:
Comprise N internal circuit in the keyboard signal input media, the corresponding equipment that uses this keyboard of each internal circuit, wherein, N is for using the equipment number of this keyboard.
Wherein:
N described internal circuit pressed to become up and down on the direction at button and arranged; Perhaps, when described internal circuit is ranks matrix-style circuit, leads of all row in the individual described internal circuit of N are positioned at button presses the layer that direction intersects, be separated from each other to each other, the lead of all row in the individual described internal circuit of N is positioned at and a row lead place layer layer inequality, is separated from each other to each other.
Wherein, when described internal circuit was an internal circuit, described keyboard signal treating apparatus comprised:
(1) key position computing module, an end is connected with described internal circuit, and the other end is connected with a plurality of signal generation modules respectively, receives and handle the signal of internal circuit input, and the key position signal that calculates is imported each signal generation module respectively;
(2) a plurality of signal generation modules connect the keyboard interface of each equipment respectively, in order to generate keyboard signal respectively, transfer to the device keyboard interface.
Wherein, when the key scan signal of described key position computing module reception was waveform, this device further comprised the frequency identification module, and this module one end is connected with described internal circuit, and the other end connects the key position computing module.
Wherein, described key position computing module and signal generation module are single-chip microcomputers.
Perhaps, described key position computing module is a single-chip microcomputer, and described signal generation module is frequency generator and frequency combiner.
Wherein, when described internal circuit is the internal circuit of N, described keyboard signal treating apparatus is for using N the equipment keyboard controller separately of this keyboard, N keyboard controller receives and handles the key scan signal that lead group is separately imported respectively, exports the keyboard signal of type separately to the keyboard interface of equipment separately.
As seen, the invention provides a kind of keyboard signal sensing device of realizing that keyboard is shared, this device comprises keyboard signal input media and keyboard signal treating apparatus.The keyboard signal input media utilizes the internal circuit of perception actuation of keys to obtain the key scan signal, outputs in the keyboard signal treating apparatus; The keyboard signal treating apparatus obtains using the corresponding signal of each equipment and the output of this keyboard according to the key scan signal.This device has improved the utilization ratio of keyboard, makes a plurality of equipment be used in combination and is achieved.
Description of drawings
Fig. 1 is the principle schematic of computer keyboard device.
Fig. 2 is the inside principle schematic of telephone keypad.
Fig. 3 is a keyboard signal sensing device synoptic diagram of the present invention.
Fig. 4 is the keyboard signal sensing device synoptic diagram that computer keyboard and telephone keypad are shared.
Fig. 5 is the keyboard signal treating apparatus schematic internal view among the embodiment 1.
Fig. 6 is the keyboard signal treating apparatus schematic internal view that is realized by single-chip microcomputer and hardware device among the embodiment 1.
Fig. 7 is the software control flow chart of the single-chip microcomputer inside among the embodiment 1.
Fig. 8 is the keyboard signal treating apparatus schematic internal view by chip microcontroller among the embodiment 1.
Fig. 9 is the keyboard signal treating apparatus schematic internal view among the embodiment 2.
Figure 10 is the synoptic diagram that the up-down structure mechanical type among the embodiment 3 is shared keyboard.
Figure 11 is the synoptic diagram that the planar structure mechanical type among the embodiment 3 is shared keyboard.
Figure 12 is the expansion synoptic diagram that the planar structure mechanical type among the embodiment 3 is shared internal circuit in the keyboard.
Embodiment
The invention provides a kind of keyboard signal sensing device, this device is divided into keyboard signal input media and keyboard signal treating apparatus.The internal circuit that in the keyboard signal input media, comprises at least one perception actuation of keys, this circuit is connected to the keyboard signal treating apparatus; The keyboard signal treating apparatus then receives and handles the key scan signal that the keyboard signal input media sends, and obtains using the required signal of each equipment of this keyboard by this key scan signal, exports in each equipment that uses this keyboard.
Describe the present invention below in conjunction with accompanying drawing.
With ranks matrix-style circuit is example.
Referring to Figure 3 shows that keyboard signal sensing device synoptic diagram of the present invention, this device comprises keyboard signal input media and keyboard signal treating apparatus at least, wherein, keyboard signal input media inside comprises mutual intersection but lead separated from one another, in the present embodiment, the behavior level direction in the ranks matrix-style circuit is classified vertical direction as, go and also can adopt other direction, only need the assurance ranks to intersect and get final product with row.The position, point of crossing of different directions lead is the key contacts position, when button is pressed, the lead point of crossing of this key contacts position is connected mutually, produce communications signals on the lead, export keyboard signal treating apparatus together with signal as the key scan signal with this, the keyboard signal treating apparatus is handled the key scan signal, and the output corresponding signal is to equipment.
Embodiment 1:
Referring to shown in Figure 4, be example to finish the shared keyboard signal treating apparatus of computer keyboard and telephone keypad.This keyboard signal sensing device comprises: keyboard signal input media and keyboard signal treating apparatus.Wherein comprise mutual intersection in the keyboard signal input media but level and vertical wires separated from one another, each position of intersecting point of horizontal wire and vertical wires is the contact position of each button.Keyboard signal treating apparatus each horizontal wire in the keyboard signal sensing device is exported a series of level signal HOUT0～HOUT6, simultaneously, it is high level that each vertical wires in the keyboard signal sensing device keeps its level signal VIN0～VIN7 respectively by pull-up resistor, each vertical wires is connected with the keyboard signal treating apparatus, imports respectively through key scan level signal VIN0～VIN7 behind the key position to the keyboard signal treating apparatus.Referring to shown in Figure 5, the keyboard signal treating apparatus in the present embodiment comprises key position computing module, computer scanning sign indicating number generation module, frequency generation module and frequency synthesis module.The key position computing module is according to the output level of HOUT0～HOUT6, according to level scanning theory scanning key scan level signal VIN0～VIN7, calculate the key position signal of this key position, output to computer scanning sign indicating number generation module and frequency synthesis module respectively.Computer scanning sign indicating number generation module produces corresponding scan code according to the key position signal, to system's keyboard interface output; The frequency synthesis module obtains occurrence frequency from frequency generation module, selects the frequency synthesis two-frequency signal and export telephone exchange to from occurrence frequency according to the key position signal that obtains then.
In the present embodiment, the implementation of keyboard signal treating apparatus comprises:
Mode one:
Referring to Fig. 6, form the keyboard signal treating apparatus by singlechip controller, frequency generator, frequency synthesizer.Single-chip microcomputer is from GPO interface output scanning level, and the GPI interface receives the key scan level.Single-chip microcomputer produces computer scanning sign indicating number and combination of frequency control signal under in house software control, export from the universal serial bus and the parallel bus of single-chip microcomputer respectively.Frequency combiner obtains pairing each frequency of key position from the frequency generator, according to the combination of frequency control signal frequency synthesis that obtains, exports frequently with double-tone again.
Wherein, referring to shown in Figure 7, the software control of single-chip microcomputer inside may further comprise the steps:
Step 703: the level that button produced is carried out weakening handle, to avoid owing to keyboard knocks the error that the vibration in the process causes;
Step 706: judge whether current button is to share button, if then execution in step 707, otherwise, return step 701 beginning keyboard scan process next time;
Step 707: single-chip microcomputer carries out frequency synthesis according to the key position signal that obtains and calculates, and the output frequency combination controls signal to frequency combiner, returns step 701 then and begins keyboard scan process next time.
Mode two:
Referring to shown in Figure 8, by chip microcontroller keyboard signal treating apparatus.This kind mode utilizes the software in the single-chip microcomputer to realize the keyboard signal processing fully.By GPO interface output scanning level, the GPI interface receives the key scan level.Single-chip microcomputer produces computer scanning sign indicating number and output frequency respectively by the software control of inside.The computer scanning sign indicating number exports computing machine to from universal serial bus; Output frequency exports simulation mixing, amplification module to from GPO1 and GPO2 interface, and this module is synthesized these two frequencies, exports frequently with double-tone.The in house software control of this single-chip microcomputer is consistent with the controlled step of mode one, difference only is: obtaining current button in judgement is when sharing button, directly calculate and pairing two frequencies of this button take place by the software in the single-chip microcomputer, and with these two frequencies outputs.
Embodiment 2:
Keyboard signal sensing device in the present embodiment comprises: keyboard signal input media and keyboard signal treating apparatus.Wherein comprise the lead of level and square crossing in the keyboard signal input media, each intersection point of horizontal wire and vertical wires is the position of each button.Wherein, the corresponding class frequency of each horizontal wire, corresponding another class frequency of each vertical wires.Under the condition that level and vertical wires are connected, the keyboard signal input media sends the level connected and the sine wave of pairing two frequencies of vertical wires to the keyboard signal treating apparatus.Referring to shown in Figure 9, the keyboard signal treating apparatus of present embodiment comprises: frequency identification module, key position computing module, computer scanning sign indicating number generation module and frequency filtering module, frequency synthesis module.The frequency identification module receives the sine wave of described two frequencies, and the frequency that after the identification identification is obtained exports key position computing module and frequency filtering module to.The key position computing module calculates the key position signal, and exports to computer scanning code generator and frequency synthesis module respectively.The computer scanning code generator take place according to the key position signal and the output scanning sign indicating number to computing machine; Not belonging to those frequencies of sharing button in the frequency that the frequency filtering module obtains identification filters out, input to the frequency synthesis module then, the frequency synthesis module is synthesized the frequency of importing in twos according to the key position signal that obtains, and exports synthetic two-frequency signal to telephone exchange.
In embodiment 2, the keyboard signal treating apparatus can be realized by single-chip microcomputer and combination of hardware, also can realize by single-chip microcomputer utilization software wherein.Implementation method is similar to mode described in the embodiment 1.
For the single-chip microcomputer in embodiment 1 and 2, also the hardware logic electric circuit of available curing is replaced, and realizes that effect is identical with the effect of the foregoing description.
Embodiment 3:
In the present embodiment, the keyboard signal input media still is made of the lead of level and square crossing, but uses the horizontal wire and the vertical wires of each equipment of this keyboard all to exist, and these horizontal wires and vertical wires are shared in the mode of physical construction.The keyboard signal treating apparatus then adopts respectively and uses the keyboard controller of each equipment of this keyboard to realize in the prior art.
With keyboard 1 and keyboard 2 is example, and described horizontal wire and vertical wires realize that with physical construction the mode of sharing comprises:
Mode one: up-down structure.
Referring to shown in Figure 10, in this structure, the vertical direction lead of keyboard 1 and keyboard 2 and horizontal direction lead constitute the finger-impu system of keyboard 1 and 2 respectively, and two groups of leads of keyboard 1 and keyboard 2 are pressed to become on the direction up and down at button and placed.Two groups of leads of keyboard 1 and keyboard 2 intersect but separated from one another respectively separately mutually, and the position, point of crossing is the contact position of button.When the shared button A of keyboard 1 and keyboard 2 is pressed, as shown in the figure, the horizontal direction lead of keyboard 1 and keyboard 2 all is pressed and bends, contact the back respectively with separately vertical direction lead and be communicated with and produce the key scan signal, the keyboard controller that the key scan signal of keyboard 1 and keyboard 2 exports to is respectively separately handled.The keyboard controller of each keyboard is according to the selected various types of keyboard controller of the prior art of the applied environment of keyboard.The mode that keyboard controller is handled keyboard signal is also identical with relevant art of the prior art.When shared button B was pressed, the course of work was consistent with button A's.
Mode two: planar structure.
Referring to Figure 11 and shown in Figure 12, in this planar structure, the horizontal direction lead of keyboard 1 and the horizontal direction lead of keyboard 2 all are positioned at perpendicular to button to be pressed on the same plane of direction, and these two groups of leads are parallel to each other on this plane; Equally, the vertical direction lead of keyboard 1 and the vertical direction lead of keyboard 2 also are positioned on the ejusdem generis plane, and parallel to each other on this plane.Keyboard 1 and keyboard 2 vertical direction lead and horizontal direction lead separately intersects mutually in the key contacts position but separated from one another.When the shared button A of keyboard 1 and keyboard 2 is pressed, the horizontal direction lead of keyboard 1 and keyboard 2 is connected with himself vertical direction lead respectively, produce the key scan signal, and the keyboard controller that the key scan signal transfers to is respectively separately handled.When shared button B was pressed, the course of work was consistent with button A's.In like manner, when sharing for a plurality of keyboards, the sharing mode that is adopted is consistent with the mode of keyboard 1 and keyboard 2.And only need to guarantee that following condition gets final product: a direction lead of different keyboards all is positioned at button presses first plane that direction intersects, and the other direction lead then all is positioned at second plane with first plane parallel.
The above two kinds of physical construction mode is only shared keyboard as embodiment and is described; also can adopt other different physical construction of structure to realize the keyboard signal input media, all should think within protection domain of the present invention as long as the invention thought of these implementations belongs to institute of the present invention protection domain.
More than adopt ranks matrix-style circuit to realize that embodiments of the invention only are preferred embodiment of the present invention, in actual applications, also can adopt independent press-key structure circuit to realize the present invention, its implementation is identical with the described content of the foregoing description in essence, those skilled in the art need not creative work and can realize, in addition, for the scan mode in the ranks matrix-style circuit, also can adopt line reversal process of the prior art, the method for transition matrices etc., the implementation difference of scan mode does not influence specific implementation of the present invention.
As seen, keyboard signal sensing device of the present invention is divided into keyboard signal input media and keyboard signal treating apparatus two parts.The internal circuit that comprises at least one perception actuation of keys in the keyboard signal input media is connected to the keyboard signal treating apparatus.The keyboard signal treating apparatus then receives the key scan signal that the keyboard signal input media transmits, and is obtained using the respective type signal of each equipment of this keyboard by this signal.This device can realize that the keyboards of a plurality of dissimilar, different purposes share, thereby promotes being used in combination to bring into play more strong functions of all kinds product.
Claims (13)
1, a kind of keyboard signal sensing device is characterized in that this device comprises:
A, keyboard signal input media, the internal circuit that comprises at least one perception actuation of keys in this device, this circuit is connected to the keyboard signal treating apparatus, and the actuation of keys of button is shared in this keyboard signal input media perception, produces signal and is sent to the keyboard signal treating apparatus;
B, keyboard signal treating apparatus, this device is connected to each keyboard interface, receive and handle the key scan signal that the keyboard signal input media sends, obtain using the respective type signal of each equipment of this keyboard by this signal, and resulting each signal is exported to respectively in the corresponding device that uses this keyboard.
2, device according to claim 1 is characterized in that described internal circuit is a ranks matrix-style circuit.
3, device according to claim 1 is characterized in that described internal circuit is independent press-key structure circuit.
4, according to claim 1 or 2 or 3 described devices, it is characterized in that, comprise in the described keyboard signal input media that the specific implementation of the internal circuit of at least one perception actuation of keys is:
Comprise an internal circuit in the keyboard signal input media.
5, according to claim 1 or 2 or 3 described devices, it is characterized in that, comprise in the described keyboard signal input media that the specific implementation of the internal circuit of at least one perception actuation of keys is:
Comprise N internal circuit in the keyboard signal input media, the corresponding equipment that uses this keyboard of each internal circuit, wherein, N is for using the equipment number of this keyboard.
6, device according to claim 5 is characterized in that:
N described internal circuit pressed to become up and down on the direction at button and arranged.
7, device according to claim 5 is characterized in that:
Described internal circuit is a ranks matrix-style circuit, leads of all row in the individual described internal circuit of N are positioned at button presses the layer that direction intersects, be separated from each other to each other, the lead of all row in the individual described internal circuit of N is positioned at and a row lead place layer layer inequality, is separated from each other to each other.
8, device according to claim 4 is characterized in that described keyboard signal treating apparatus comprises:
(1) key position computing module, an end is connected with described internal circuit, and the other end is connected with a plurality of signal generation modules respectively, receives and handle the signal of internal circuit input, and the key position signal that calculates is imported each signal generation module respectively;
(2) a plurality of signal generation modules connect the keyboard interface of each equipment respectively, in order to generate keyboard signal respectively, transfer to the device keyboard interface.
9, device according to claim 8, it is characterized in that when the key scan signal of described key position computing module reception is waveform, this device further comprises the frequency identification module, and this module one end is connected with described internal circuit, and the other end connects the key position computing module.
10, device according to claim 8 is characterized in that described key position computing module and signal generation module are single-chip microcomputers.
11, device according to claim 8 is characterized in that described key position computing module is a single-chip microcomputer, and described signal generation module is frequency generator and frequency combiner.
12, according to claim 6 or 7 described devices, it is characterized in that described keyboard signal treating apparatus is for using N the equipment keyboard controller separately of this keyboard, N keyboard controller receives and handles the key scan signal that lead group is separately imported respectively, exports the keyboard signal of type separately to the keyboard interface of equipment separately.
13, device according to claim 5, it is characterized in that described keyboard signal treating apparatus is for using N the equipment keyboard controller separately of this keyboard, N keyboard controller receives and handles the key scan signal that lead group is separately imported respectively, exports the keyboard signal of type separately to the keyboard interface of equipment separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03121054 CN1251053C (en) | 2003-03-21 | 2003-03-21 | Keyboard signal sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03121054 CN1251053C (en) | 2003-03-21 | 2003-03-21 | Keyboard signal sensor |
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| Publication Number | Publication Date |
|---|---|
| CN1532678A CN1532678A (en) | 2004-09-29 |
| CN1251053C true CN1251053C (en) | 2006-04-12 |
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| CN 03121054 Expired - Fee Related CN1251053C (en) | 2003-03-21 | 2003-03-21 | Keyboard signal sensor |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328648C (en) * | 2005-11-25 | 2007-07-25 | 昆明凯旋利科技有限公司 | Sensing type input keyboard based on force mode |
| CN102722120B (en) * | 2012-06-05 | 2014-11-19 | 中国电子科技集团公司第四十一研究所 | Instrument keyboard controller with ultralow power consumption |
| CN103869987B (en) * | 2012-12-10 | 2017-03-01 | 上海斐讯数据通信技术有限公司 | External connection keyboard and mobile terminal |
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