CN201917871U - Inputting device capable of removing ghost key - Google Patents
Inputting device capable of removing ghost key Download PDFInfo
- Publication number
- CN201917871U CN201917871U CN2010206077536U CN201020607753U CN201917871U CN 201917871 U CN201917871 U CN 201917871U CN 2010206077536 U CN2010206077536 U CN 2010206077536U CN 201020607753 U CN201020607753 U CN 201020607753U CN 201917871 U CN201917871 U CN 201917871U
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- electrically connected
- comparer
- induction
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Abstract
Disclosed is an inputting device capable of removing a ghost key, comprising a switch module, a comparator, a switching unit and a processing module. The switch module comprises a plurality of drive wires which respectively receive a plurality of drive signals, a plurality of induction lines and switch units. Each switch unit comprises a switch and a resistance. The comparator comprises a first input end, a second input end receiving a reference signal and an output end outputting a comparison signal. The switching unit controlled by a group of control signals enables at least one induction line to be electrically connected to the first input end of the comparator. The processing module is used for setting the drive signal, the reference signal and at least a part of the group of control signals, enabling the comparison signal to indicate whether at least one of all the switches is conductive, or at least one of the plurality of switches is conductive, or one switch is conductive or not.
Description
Technical field
The utility model relates to a kind of input media, particularly relates to a kind of input media of eliminating terrible key.
Background technology
Consult Fig. 1, wherein show a kind of existing key board unit.Switch module 1 comprises many drive wires 111～114, many lines of induction 121～124 and a plurality of switch element 13.Each switch element 13 comprise be connected electrically in the drive wire 111～114 corresponding one and the line of induction 121～124 in a switch 131 between corresponding one.For instance, when the switch 131 that is electrically connected to article one drive wire 111 and article one line of induction 121, when being electrically connected to the switch 131 of article one drive wire 111 and the 3rd line of induction 123 and being electrically connected to switch 131 conductings simultaneously of the 3rd drive wire 113 and article one line of induction 121, except these three switches 131 can be judged as the conducting, the switch 131 that is electrically connected to the 3rd drive wire 113 and the 3rd line of induction 123 also can be judged as conducting, and Here it is so-called " terrible key ".Detailed description can be with reference to No. the 5386584th, United States Patent (USP).
Consult Fig. 2, a kind of existing key board unit place different with above-mentioned key board unit of eliminating terrible key is: each switch element 13 ' also comprises a diode 132 of connecting with switch 131.Detailed description can be with reference to No. the 5386584th, United States Patent (USP).Yet this can cause the cost of key board unit to increase, and switch module 1 can't be realized in the mode that is printed on the soft board.
Consult Fig. 3, United States Patent (USP) has disclosed the another kind of existing key board unit of eliminating terrible key for No. 4633228, and its switch module 2 comprises many drive wires 211～214, many lines of induction 221～224 and a plurality of switch element 23.Each switch element 23 be included in the drive wire 211～214 corresponding one and the line of induction 221～224 in a switch 231 and a resistance 232 of connecting between corresponding one.Each bar line of induction 221～224 is electrically connected to supply-voltage source via a resistance 3.This key board unit is series at voltage level that resistance 232 dividing potential drops are produced as judging the whether foundation of conducting of the selected switch of in the switch 231 one 231 with resistance 232, resistance 3, but this key board unit has following shortcoming: (1) is for selected switch 231, when the switch 231 of conducting the more the time, the connection in series-parallel of resistance 232, resistance 3 equivalence effect can cause the situation of easy generation erroneous judgement, especially takes place more easily when both resistance ratios of resistance 232, resistance 3 are less; (2) once can only judge whether conducting of a switch 231, therefore be used to judge all switches 231 separately total time of state longer; (3) degree of accuracy of the resistance of resistance 232, resistance 3 is had relatively high expectations; And (4) each bar line of induction 221～224 need cooperate with a comparer (figure do not show), so the number of the line of induction 221～224 is when increasing, and the number of comparer is and then increase also.
The utility model content
The purpose of this utility model provides a kind of input media of eliminating terrible key, can solve the above-mentioned problem relevant with prior art.
The input media that the utility model can be eliminated terrible key comprises a switch module, a comparer, a switch unit, a bias resistance and a processing module.
This switch module comprises many drive wires, many lines of induction and a plurality of switch element.Each switch element be included in the described drive wire corresponding one and the described line of induction in a switch and a resistance of connecting between corresponding one.Each switch switches between conducting and not conducting.
This comparer comprises that a first input end, one receive second input end of a reference signal, and the output terminal of a comparison signal of an output, in order to received signal and this reference signal of this first input end relatively, to obtain this comparison signal.
This switch unit is electrically connected to the first input end of the described line of induction and this comparer, switched by the control of one group of control signal, and in the described line of induction at least one is electrically connected to the first input end of this comparer.
This bias resistance has first end that is electrically connected to the first input end of this comparer, and second end that receives one first voltage level.
This processing module is electrically connected to described drive wire, this comparer and this switch unit, be clipped to described drive wire in order to export a plurality of drive signal branches, export second input end of this reference signal to this comparer, and export this group control signal, and receive this comparison signal from the output terminal of this comparer to this switch unit.
This processing module is set at least a portion in described drive signal, this reference signal and this group control signal, so that this comparison signal indicates in the switch of described switch element whether at least one conducting is arranged.
When this processing module also has at least one conducting in this comparison signal is indicated the switch of described switch element, set at least a portion in described drive signal, this reference signal and this group control signal, so that the indication of this comparison signal is electrically connected in the switch of described switch element of a selected line of induction in the described line of induction whether at least one conducting is arranged.
When this processing module also has at least one conducting in the indication of this comparison signal is electrically connected to the switch of described switch element of this selected line of induction, set at least a portion in described drive signal, this reference signal and this group control signal, so that the indication of this comparison signal is electrically connected to the whether conducting of switch of this switch element of a selected drive wire in this selected line of induction and the described drive wire.
The input media of eliminating terrible key described in the utility model, this processing module is set described drive signal and is all second voltage level that is higher than this first voltage level, and to set this reference signal be a tertiary voltage level between between this first voltage level and this second voltage level, and set this group control signal so that this switch unit all is electrically connected to the first input end of this comparer with the described line of induction, whether at least one conducting is arranged in the switch of described switch element thereby this comparison signal is indicated; When this processing module has at least one conducting in this comparison signal is indicated the switch of described switch element, setting this reference signal is the 4th voltage level between between this first voltage level and this second voltage level, and set this group control signal so that this switch unit will be selected the first input end that the line of induction is electrically connected to this comparer, and make this switch unit all receive this first voltage level, thereby make this comparison signal indicate in the switch of the described switch element that is electrically connected to this selected line of induction whether at least one conducting is arranged by all the other lines of induction; When this processing module has at least one conducting in the indication of this comparison signal is electrically connected to the switch of described switch element of this selected line of induction, this drive signal that setting outputs to this selected drive wire is this second voltage level, and set all the other drive signals for this first voltage level or a high impedance status, thereby make this comparison signal indication be electrically connected to the whether conducting of switch of this switch element of this selected line of induction and this selected drive wire.
The input media of eliminating terrible key described in the utility model, this processing module comprises: a reservoir stores the state of the switch of described switch element; And a processing unit, be electrically connected to this reservoir, in order to exporting described drive signal, this reference signal and this group control signal, and receive this comparison signal; This processing unit is set the stored described state of this reservoir and is all a not on-state, and set described drive signal, this reference signal and this group control signal, and when this comparison signal was indicated the switch conduction of this switch element that is electrically connected to this selected line of induction and this selected drive wire, the state of setting the switch of this stored switch element of this reservoir was a conducting state.
The input media of eliminating terrible key described in the utility model, this processing unit comprises: a processor in order to exporting described drive signal, a reference current and this group control signal, and receives this comparison signal; And a transfer resistance, be electrically connected to this processor, in order to convert this reference current to this reference signal; This processor is set the stored described state of this reservoir and is all this not on-state, and set described drive signal, this reference current and this group control signal, and when this comparison signal was indicated the switch conduction of this switch element that is electrically connected to this selected line of induction and this selected drive wire, the state of setting the switch of this stored switch element of this reservoir was this conducting state.
The input media of eliminating terrible key described in the utility model, this switch unit comprises a plurality of two passes of cutting, each is two cuts to close and comprises that is electrically connected in the described line of induction first end of corresponding one, second end that is electrically connected to the first input end of this comparer, and the 3rd end that receives this first voltage level, described two the incision closed in order to according to this group control signal, makes between this first end and this second end or conducting between this first end and the 3rd end.
The beneficial effects of the utility model are: (1) this switch module does not need to use diode, can save cost, can realize in the mode that is printed on the soft board yet; (2) the connection in series-parallel situation of described resistance is simpler, therefore the situation that is not easy to judge by accident; (3) this processing module can judge once in described switch all or part of whether at least one conducting is arranged, and judges judging to omit further when not having switch conduction, therefore be used to judge described switch separately total time of state shorter; (4) degree of accuracy of the resistance of described resistance requires lower; And (5) only need a comparer.
Description of drawings
Fig. 1 is a circuit diagram, and a kind of existing key board unit is described;
Fig. 2 is a circuit diagram, and a kind of existing key board unit of eliminating terrible key is described;
Fig. 3 is a circuit diagram, and the another kind of existing key board unit of eliminating terrible key is described;
Fig. 4 is a circuit diagram, illustrates that the present invention can eliminate the preferred embodiment of the input media of terrible key.
Embodiment
Below in conjunction with drawings and Examples the utility model is elaborated.
Consult Fig. 4, the preferred embodiment that the utility model can be eliminated the input media of terrible key comprises a switch module 4, comparer 5, switch unit 6, a bias resistance 7 and a processing module 8.
Switch module 4 comprises many drive wires 41, many lines of induction 42 and a plurality of switch element 43.Each switch element 43 be included in the drive wire 41 corresponding one and the line of induction 42 in a switch 431 and a resistance 432 of connecting between corresponding one.Each switch 431 switches between conducting and not conducting.
Comparer 5 comprises a first input end, second input end and an output terminal of exporting a comparison signal that receives a reference signal, in order to compare received signal and this reference signal of first input end, to obtain comparison signal.In the present embodiment, first input end is that normal phase input end, second input end are inverting inputs.
Bias resistance 7 has first end and second end that receives first voltage level that are electrically connected to the first input end of comparer 5, faintly be biased into first voltage level in order to voltage level with the first input end of comparer 5, that is to say, if switch unit 6 output-voltage levels are to the first input end of comparer 5, then the voltage level of the first input end of comparer 5 will equal the voltage level that switch unit 6 is exported in fact, but not first voltage level, otherwise the voltage level of the first input end of comparer 5 will equal first voltage level in fact.
Processing module 8 comprises a reservoir 81 and a processing unit 82.The state of the switch 431 of reservoir 81 storage switch unit 43.Processing unit 82 is electrically connected to drive wire 41, comparer 5, switch unit 6 and reservoir 81, in order to exporting that a plurality of drive signal branches are clipped to drive wire 41, the output reference signal is to second input end of comparer 5 and to export this group control signal and arrive switch unit 6, and from the output terminal reception comparison signal of comparer 5.
In the present embodiment, the tertiary voltage level equals 0.9 times of second voltage level in fact.It should be noted that, when in the switch 431 of switch element 43 during without any conductings, the voltage level of the first input end of comparer 5 can be biased into first voltage level in fact by biased resistance 7, and when in the switch 431 of switch element 43 at least one conducting being arranged, the voltage level of the first input end of comparer 5 can be biased into second voltage level in fact by switch module 4, therefore, in theory, as long as the tertiary voltage level is between first voltage level, just can reach the purpose of judgement between second voltage level, but cause misjudgment for fear of noise, preferably, the difference between the tertiary voltage level and second voltage level is in fact more than or equal to a default margin.
When processing unit 82 also has at least one conducting in the switch 431 of comparison signal indicator cock unit 43, setting reference signal is the 4th voltage level between between first voltage level, second voltage level, and set this group control signal so that switch unit 6 is electrically connected to one in the line of induction 42 selected line of induction 42 first input end of comparer 5, and make switch unit 6 allow all the other lines of induction 42 all receive first voltage level, thereby make comparison signal indicate in the switch 431 of the switch element 43 that is electrically connected to the selected line of induction 42 whether at least one conducting is arranged.When the voltage level of the first input end of comparer 5 during in fact greater than the 4th voltage level, comparison signal is pulled to second voltage level in fact, be electrically connected to indication in the switch 431 of switch element 43 of the selected line of induction 42 at least one conducting is arranged, otherwise, comparison signal is pulled to first voltage level in fact, is electrically connected to indication in the switch 431 of switch element 43 of the selected line of induction 42 without any conductings.
In the present embodiment, the 4th voltage level equals 1/ (2+2n) times of second voltage level in fact, and n is the number of drive wire 41.It should be noted that, when in the switch 431 of the switch element 43 that is electrically connected to the selected line of induction 42 during without any conductings, the voltage level of the first input end of comparer 5 can be biased into first voltage level in fact by biased resistance 7, and when in the switch 431 of the switch element 43 that is electrically connected to the selected line of induction 42 at least one conducting being arranged, the voltage level of the first input end of comparer 5 can be biased into second voltage level in fact by switch module 4.
When processing unit 82 also has at least one conducting in comparison signal indication is electrically connected to the switch 431 of switch element 43 of the selected line of induction 42, the drive signal that setting outputs to a selected drive wire 41 in the drive wire 41 is second voltage level, and to set all the other drive signals be first voltage level or a high impedance status, thereby make the comparison signal indication be electrically connected to the whether conducting of switch 431 of the switch element 43 of the selected line of induction 42 and selected drive wire 41.When the voltage level of the first input end of comparer 5 during in fact greater than the 4th voltage level, comparison signal is pulled to second voltage level in fact, be electrically connected to switch 431 conductings of the switch element 43 of the selected line of induction 42 and selected drive wire 41 with indication, otherwise, comparison signal is pulled to first voltage level in fact, is electrically connected to the switch 431 not conductings of the switch element 43 of the selected line of induction 42 and selected drive wire 41 with indication.
It should be noted that, when being electrically connected to the switch 431 not conductings of the switch element 43 of selecting the line of induction 42 and selected drive wire 41, the voltage level of the first input end of comparer 5 can be biased to first voltage level in fact, and when being electrically connected to switch 431 conductings of the switch element 43 of selecting the line of induction 42 and selected drive wire 41, the voltage level of the first input end of comparer 5 in fact more than or equal to the 1/n of second voltage level doubly, therefore, in theory, the 4th voltage level is as long as just can reach the purpose of judgement between doubly between the 1/n of first voltage level and second voltage level, but cause misjudgment for fear of noise, preferably, the difference between the 1/n of the 4th voltage level and second voltage level times is in fact more than or equal to a default margin.
In the present embodiment, processing unit 82 comprises a processor 821 and a transfer resistance 822.Processor 821 is in order to output drive signal, a reference current and this group control signal, and the reception comparison signal.Transfer resistance 822 is electrically connected to processor 821, in order to convert reference current to reference signal.Processor 821 is set reservoir 81 stored states and is all not on-state, and setting drive signal, reference current and this group control signal, and when comparison signal indication was electrically connected to switch 431 conductings of switch element 43 of the selected line of induction 42 and selected drive wire 41, the state of setting the switch 431 of this stored switch element 43 of reservoir 81 was a conducting state.
Input media that it should be noted that present embodiment can be for example key board unit, electric resistance touch-control device, and not as limit.Comparer 5, switch unit 6, bias resistance 7 and processing module 8 can be integrated into an integrated circuit, but also can realize with a plurality of circuit that separate.
Conclude above-mentionedly, compared with prior art, present embodiment has the following advantages: (1) switch module 4 does not need to use diode, can save cost, can realize in the mode that is printed on the soft board yet; (2) the connection in series-parallel situation of resistance 432 is simpler, the situation that therefore is not easy to judge by accident; (3) processing module 8 can judge once in switch 431 all or part of whether at least one conducting is arranged, and judges judging to omit further when not having switch 431 conducting, therefore be used for judging switch 431 separately total time of state shorter; (4) accuracy of the resistance of resistance 432 requires lower; And (5) only need a comparator 5. So present embodiment can be reached the purpose of this utility model really.
Claims (4)
1. the input media that can eliminate terrible key comprises:
A switch module comprises: many drive wires, many lines of induction and a plurality of switch element; Each switch element be included in the described drive wire corresponding one and the described line of induction in a switch and a resistance of connecting between corresponding one, each switch switches between conducting and not conducting;
It is characterized in that this input media that can eliminate terrible key also comprises:
A comparer, comprise a first input end, second input end that receives a reference signal, and the output terminal of a comparison signal of an output, this comparer is in order to received signal and this reference signal of this first input end relatively, to obtain this comparison signal;
A switch unit is electrically connected to the first input end of the described line of induction and this comparer, and this switch unit is subjected to one group of control signal control switching, and in the described line of induction at least one is electrically connected to the first input end of this comparer;
A bias resistance has first end that is electrically connected to the first input end of this comparer, and second end that receives one first voltage level; And
A processing module, be electrically connected to described drive wire, this comparer and this switch unit, this processing module is clipped to described drive wire in order to export a plurality of drive signal branches, exports second input end of this reference signal to this comparer, and export this group control signal, and receive this comparison signal from the output terminal of this comparer to this switch unit.
2. the input media of eliminating terrible key according to claim 1 is characterized in that, this processing module comprises:
A reservoir stores the state of the switch of described switch element; And
A processing unit is electrically connected to this reservoir, in order to exporting described drive signal, this reference signal and this group control signal, and receives this comparison signal;
This processing unit is set the stored described state of this reservoir and is all a not on-state, and set described drive signal, this reference signal and this group control signal, and when this comparison signal was indicated the switch conduction of this switch element that is electrically connected to this selected line of induction and this selected drive wire, the state of setting the switch of this stored switch element of this reservoir was a conducting state.
3. the input media of eliminating terrible key according to claim 2 is characterized in that, this processing unit comprises:
A processor in order to exporting described drive signal, a reference current and this group control signal, and receives this comparison signal; And
A transfer resistance is electrically connected to this processor, in order to convert this reference current to this reference signal;
This processor is set the stored described state of this reservoir and is all this not on-state, and set described drive signal, this reference current and this group control signal, and when this comparison signal was indicated the switch conduction of this switch element that is electrically connected to this selected line of induction and this selected drive wire, the state of setting the switch of this stored switch element of this reservoir was this conducting state.
4. the input media of eliminating terrible key according to claim 1, it is characterized in that, this switch unit comprises a plurality of two passes of cutting, each is two cuts to close and comprises that is electrically connected in the described line of induction first end of corresponding one, second end that is electrically connected to the first input end of this comparer, and the 3rd end that receives this first voltage level, described two the incision closed in order to according to this group control signal, makes between this first end and this second end or conducting between this first end and the 3rd end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206077536U CN201917871U (en) | 2010-11-10 | 2010-11-10 | Inputting device capable of removing ghost key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206077536U CN201917871U (en) | 2010-11-10 | 2010-11-10 | Inputting device capable of removing ghost key |
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| Publication Number | Publication Date |
|---|---|
| CN201917871U true CN201917871U (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206077536U Expired - Lifetime CN201917871U (en) | 2010-11-10 | 2010-11-10 | Inputting device capable of removing ghost key |
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| CN (1) | CN201917871U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513775A (en) * | 2012-06-22 | 2014-01-15 | 盛群半导体股份有限公司 | Keyboard device and method for detecting key state |
| CN105027449A (en) * | 2013-02-28 | 2015-11-04 | 克里斯多福·赫尔德埃斯 | Method for determining active input elements of an input arrangement and input arrangement |
| CN106561003A (en) * | 2015-10-06 | 2017-04-12 | 恩斯迈电子(深圳)有限公司 | Keyboard key scanning method |
-
2010
- 2010-11-10 CN CN2010206077536U patent/CN201917871U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513775A (en) * | 2012-06-22 | 2014-01-15 | 盛群半导体股份有限公司 | Keyboard device and method for detecting key state |
| CN103513775B (en) * | 2012-06-22 | 2016-08-03 | 盛群半导体股份有限公司 | Keyboard device and method for detecting key state |
| CN105027449A (en) * | 2013-02-28 | 2015-11-04 | 克里斯多福·赫尔德埃斯 | Method for determining active input elements of an input arrangement and input arrangement |
| CN106561003A (en) * | 2015-10-06 | 2017-04-12 | 恩斯迈电子(深圳)有限公司 | Keyboard key scanning method |
| CN106561003B (en) * | 2015-10-06 | 2020-02-14 | 恩斯迈电子(深圳)有限公司 | Keyboard key scanning method |
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Granted publication date: 20110803 |
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