CN200947202Y - Keyboard capable of canceling ghost key - Google Patents
Keyboard capable of canceling ghost key Download PDFInfo
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- CN200947202Y CN200947202Y CN 200620004657 CN200620004657U CN200947202Y CN 200947202 Y CN200947202 Y CN 200947202Y CN 200620004657 CN200620004657 CN 200620004657 CN 200620004657 U CN200620004657 U CN 200620004657U CN 200947202 Y CN200947202 Y CN 200947202Y
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- 239000011159 matrix material Substances 0.000 claims abstract description 19
- 230000011664 signaling Effects 0.000 claims description 31
- 238000010304 firing Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 11
- 238000012905 input function Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a keyboard that is capable of eliminating the ghost keys. The intrinsic circuit in the keyboard is formed into a keyboard scanning matrix via the pluralities of I O wires of the microprocessor. The keyboard scanning matrix defines pluralities of signal switches via the crossing point of the two I O wires, and a main level resistance is connected with the micro processor which is also connected with the reference level resistance that helps deciding the break-over condition of the signal switch. Wherein, at the least, each of the signal switch is connected with the sub-level resistance connected in series with the main level resistance. When the customer presses any three signal switches on the rectangular angles of the keyboard scanning matrix, the main-level resistance and the sub-level resistance form a new level resistance. The electrical potential calculated by the new level resistance and the electricity running through the keyboard scanning matrix is below the reference level electric potential and the ghost keys are avoided.
Description
Technical field
The utility model relates to a kind of keyboard, relates in particular to a kind of keyboard of eliminating terrible key.
Background technology
Keyboard is to be taken as one of important tool that input signal and computing machine link up, and is the key of differentiation keyboard quality and how to design keyboard in the corresponding circuit of computing machine.The common circuit that is laid under the button is followed the keypad protocol of standard mostly, keypad protocol be serial and keyboard each button except combination button (Shift, Ctrl, Alt) all distinguish corresponding specific coding; Please refer to shown in Figure 1, this keyboard circuit is that a plurality of parallel and vertical I/ O line 111a, 111b, 112a, the 112b with a microprocessor 100 forms a matrix 110 and be connected with a main accurate position resistance R 1, this matrix 110 interlock a plurality of button 120a, 120b, 120c, 120d, when by next button 120a the time, keyboard just sends the computer interpretation that is encoding to of this button 120a representative; When with the button 120a reinstatement attitude pressed, keyboard will send the coding of loosing one's grip, and so disposable reciprocating action then is considered as the one-touch action.
Can notice that when the test keyboard this type of utilizes both made keyboards of set matrix 110 arrangement circuit, even determine that all elements and the distribution of keyboard all are intact state, still can produce a kind of conflict phenomenon, this conflict phenomenon occurs in after the user is by next button 120a, press another button 120b again, system only can send the latter's signal rather than the signal of two buttons is sent simultaneously, this is mutual exclusion because of keypad code each other, and the former signal can be capped and can not be resumed.
Another phenomenon, press two button 120a, 120b on the rectangular angular of matrix 110 of keyboard circuit simultaneously as the user, the 120c (or 120d) that pushes button again, button 120c (or 120d) signal that can cause microprocessor 100 correctly to judge to push, this phenomenon is referred to as terrible key; This problem for push keyboard fast the user will have the defective of losing character and produce; And, for the players of computer games of using keyboard, often need to push simultaneously a plurality of buttons to produce the compound keys signal, be used for carrying out different walkthrough modes, and keyboard produces the phenomenon of terrible key, the puzzlement that must cause the player to play smoothly.
In order to prevent that the user from pressing the problem that the terrible key that can't show useful signal is not but realized, provide a kind of terrible key (being also referred to as the ghost key) of can checking whether to be pressed in " with the input media and the coding method thereof of multidimension electrode definition push key " that No. the 00486661st, the TaiWan, China patent announcement, and passed the patent of error message back.It wherein is that N is the integer greater than 2 with each button of N dimension electrode definition input media with the input media and the coding method thereof of multidimension electrode definition push key.According to the method for scanning button of the present utility model is to scan each dimension electrode one by one and write down its position data and compare, and then finds out the button that is pressed.
Other please refer to No. the 00578088th, TaiWan, China patent announcement " key input apparatus with your input function of mine-laying ", this Patent publish a kind of simple and easy keyboard of avoiding producing the ghost key, it has disposed your input function of easy key input function and mine-laying.Keyboard comprises the key input circuit with the key matrix form.In key matrix, there are not two predetermined key switches that are designated as mine-laying that input function key to be connected on the sweep trace on the keyboard.This key input apparatus in the six point type input systems when appointment is operated simultaneously with six keys of finishing mine-laying that input function, can not produce the ghost key on any predetermined key switch when using your input function of mine-laying.
The utility model content
Fundamental purpose of the present utility model is to solve the defective that exists in the above-mentioned prior art, the keyboard of eliminating terrible key that provides a kind of situation of avoiding losing character to produce.According to the keyboard of eliminating terrible key of the present utility model, this keyboard circuit is that a plurality of I/O lines with a microprocessor form a keyboard scan matrix, cross-point with two I/O lines on this keyboard scan matrix defines a plurality of signaling switches, and be electrically connected with a main accurate position resistance with this microprocessor, and be connected with the conducting state that the accurate position of reference current potential is judged this signaling switch.
Each signaling switch also is electrically connected with at least one and described main accurate position resistance is the sublevel resistance that is electrically connected in series state, and the sublevel resistance on the adjacent parallel I/O line is state in parallel, wherein, described keyboard circuit can be laid on the film circuit board in the mode of printing.When the user pushes on the rectangular angular of described keyboard scan matrix wherein any three signaling switches, the connection status of main accurate position resistance and sublevel resistance forms new accurate position resistance, the potential value that should new accurate position resistance calculates the back gained with the electric current that flow to described keyboard scan matrix less than described with reference to accurate position current potential, and then the situation that can exempt terrible key generation.
In addition, described microprocessor can judge that with regard to above-mentioned condition this vertically reaches one of them signaling switch that is not switched on the parallel I/O line with electronegative potential detection method or noble potential detection method, effectively to prevent the generation of terrible key phenomenon.
To sum up, the situation that not only can avoid losing character according to the keyboard of eliminating terrible key of the present utility model produces but also can effectively prevent the generation of terrible key phenomenon.
Description of drawings
Fig. 1 is known circuit diagram.
Fig. 2 is the synoptic diagram of circuit embodiments of the present utility model.
Fig. 3 is the synoptic diagram of another circuit embodiments of the present utility model.
Fig. 4 is the synoptic diagram of another circuit embodiments of the present utility model.
Embodiment
The utility model is a kind of keyboard of eliminating terrible key, relevant detailed description of the present utility model and technology contents, and existing accompanying drawings is as follows:
Please refer to shown in Figure 2, be circuit diagram of the present utility model, as shown in the figure: described keyboard circuit is a plurality of parallel I/O line 211a with a microprocessor 200,211b and vertical I/ O line 212a, 212b forms a keyboard scan matrix 210, on the described keyboard scan matrix 210 with described parallel I/ O line 211a, 211b and vertical I/O line 212a, the cross-point of 212b defines a plurality of signaling switch 220a, 220b, 220c, 220d, and be electrically connected with a main accurate position resistance R 1 with this microprocessor 200, and be connected with one and judge these signaling switches 220a with reference to an accurate position current potential Vref, 220b, 220c, the conducting state of 220d.
Each signaling switch 220a, 220b, 220c, 220d are electrically connected with at least one and described main accurate position resistance R 1 is the sublevel resistance R 2 that is electrically connected in series state, and the sublevel resistance R 2 on this adjacent parallel I/O line 211a, the 211b is a state in parallel.Wherein, this is electrically connected in series state can be subdivided into three kinds of states: one, and can be connected with one with the firing point front end of described signaling switch 220a, 220b, 220c, 220d is the sublevel resistance R 2 (as shown in Figure 2) that is electrically connected in series state with described main accurate position resistance R 1; Its two, can with described signaling switch 220a, 220b, 220c, 220d firing point rear end be connected with one with described main accurate position resistance R 1 for being electrically connected in series the sublevel resistance R 2 (as shown in Figure 3) of state; Its three, can with described signaling switch 220a, 220b, 220c, 220d firing point front end and rear end respectively be connected with one with described main accurate position resistance R 1 for being electrically connected in series sublevel resistance R 2, the R3 (as shown in Figure 4) of state.When pushing the vertical I/O line of described keyboard 212a, 212b and parallel I/ O line 211a, 211b, the user is staggered to form any three signaling switch 220a, 220b, 220c among four signaling switch 220a, 220b, 220c, the 220d, during with generation compound keys signal, because the connection status of main accurate position resistance R 1 and sublevel resistance R 2, R3 forms new accurate position resistance, and described new standard position resistance calculates the potential value of back gained less than described reference accurate position current potential Vref, so can exempt the situation that terrible key takes place with the electric current that flow to described keyboard scan matrix 210.
In addition, described microprocessor 200 can be judged described signaling switch 220a with electronegative potential detection method or noble potential detection method, 220b, 220c, the conducting state of 220d: when microprocessor 200 is detected parallel I/O line 211a with the electronegative potential detection method, during the potential value of 211b, at signaling switch 220a is the state of ON, R1 and R2 dividing potential drop must make parallel I/O line 211a, the 211b current potential is lower than described with reference to accurate position current potential Vref, microprocessor 200 will detect the state that signaling switch 220a is ON like this, on the contrary, parallel I/O line 211a, the 211b current potential is higher than described with reference to accurate position current potential Vref, and then detection signal switch 220a is the OFF state; When the detection method of microprocessor 200 is the noble potential detection method, at signaling switch 220a is the state of ON, it is described with reference to accurate position current potential Vref that R1 and R2 dividing potential drop must make parallel I/ O line 211a, 211b current potential be higher than, microprocessor 200 will detect the state that signaling switch 220a is ON like this, on the contrary, then detection signal switch 220a is the OFF state.
Judge described vertical I/ O line 212a, 212b and last one of them the signaling switch 220d that is not switched on of parallel I/ O line 211a, 211b at above-mentioned condition, when described microprocessor 200 is the electronegative potential detection method, main accurate position resistance R 1 and sublevel resistance R 2, R3 bleeder circuit, need make the potential value of judging described parallel I/O line 211b when this signaling switch of scanning 220d be higher than the accurate position of the reference current potential Vref of this microprocessor 200, detect described signaling switch 220d this moment is the OFF state.In addition when described microprocessor 200 is the noble potential detection method, main accurate position resistance Vref and sublevel resistance R 2, R3 bleeder circuit, need make the potential value of when the described signaling switch 220d of scanning, judging parallel I/O line 211b be lower than accurate current potential Vref of reference of described microprocessor 200, detect described signaling switch 220d this moment is the OFF state, and two such methods can effectively prevent the generation of terrible key phenomenon.
The above is a preferred embodiment of the present utility model only, is not limited to the present invention.In the above-described embodiments, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. the keyboard that can eliminate terrible key, described keyboard circuit is that a plurality of I/O lines with a microprocessor (200) form a keyboard scan matrix (210), the cross-point that described keyboard scan matrix (210) is gone up with two I/O lines defines a plurality of signaling switches, be electrically connected with a main accurate position resistance (R1) with described microprocessor (200), and be connected with the conducting state that a reference accurate position current potential (Vref) is judged described signaling switch (220a, 220b, 220c, 220d), it is characterized in that:
Described signaling switch (220a, 220b, 220c, 220d) be electrically connected with at least one and described main accurate position resistance (R1) for being electrically connected in series the sublevel resistance (R2 of state, R3), and adjacent parallel I/O line (211a, sublevel resistance (R2 211b), R3) be state in parallel, push vertical I/O line (212a simultaneously, 212b) and parallel I/O line (211a, 211b) go up four signaling switch (220a that form, 220b, 220c, any three signaling switches 220d) to be producing the compound keys signal, and with main accurate position resistance (R1) and sublevel resistance (R2, R3) string, the state of being connected in parallel forms new accurate position resistance to eliminate the generation of terrible key.
2. the keyboard of eliminating terrible key according to claim 1, it is characterized in that it is the sublevel resistance (R2) that is electrically connected in series state with described main accurate position resistance (R1) that the firing point front end of described signaling switch (220a, 220b, 220c, 220d) is connected with one.
3. the keyboard of eliminating terrible key according to claim 1, it is characterized in that, the firing point rear end of described signaling switch (220a, 220b, 220c, 220d) be connected with one with described main accurate position resistance (R1) for being electrically connected in series the sublevel resistance (R2) of state.
4. the keyboard of eliminating terrible key according to claim 1, it is characterized in that, the firing point front end of described signaling switch (220a, 220b, 220c, 220d) and rear end respectively be connected with one with described main accurate position resistance (R1) for being electrically connected in series the sublevel resistance (R2, R3) of state.
5. the keyboard of eliminating terrible key according to claim 1 is characterized in that, described keyboard circuit is printed in film circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620004657 CN200947202Y (en) | 2006-04-03 | 2006-04-03 | Keyboard capable of canceling ghost key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620004657 CN200947202Y (en) | 2006-04-03 | 2006-04-03 | Keyboard capable of canceling ghost key |
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| Publication Number | Publication Date |
|---|---|
| CN200947202Y true CN200947202Y (en) | 2007-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620004657 Expired - Lifetime CN200947202Y (en) | 2006-04-03 | 2006-04-03 | Keyboard capable of canceling ghost key |
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| CN (1) | CN200947202Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298266A (en) * | 2013-05-02 | 2013-09-11 | 精模电子科技（深圳）有限公司 | Manufacturing method of flexible circuit board of keyboard |
| CN103678079A (en) * | 2012-09-14 | 2014-03-26 | 群光电子股份有限公司 | Matrix test method, system and voltage clock control method |
| CN108322224A (en) * | 2017-01-17 | 2018-07-24 | 群光电子股份有限公司 | Detection circuit |
| CN105589567B (en) * | 2015-11-04 | 2018-07-31 | 刘文仲 | Hit by hands formula spelling input keyboard and input method |
| TWI648757B (en) * | 2018-06-19 | 2019-01-21 | 群光電子股份有限公司 | Anti-ghost button membrane switch device |
| CN109474282A (en) * | 2017-09-07 | 2019-03-15 | 光宝电子(广州)有限公司 | Key board unit |
| CN114816081A (en) * | 2022-04-29 | 2022-07-29 | 长沙锐逸微电子有限公司 | Low-cost high-reliability keyboard implementation scheme |
-
2006
- 2006-04-03 CN CN 200620004657 patent/CN200947202Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103678079A (en) * | 2012-09-14 | 2014-03-26 | 群光电子股份有限公司 | Matrix test method, system and voltage clock control method |
| CN103298266A (en) * | 2013-05-02 | 2013-09-11 | 精模电子科技（深圳）有限公司 | Manufacturing method of flexible circuit board of keyboard |
| CN103298266B (en) * | 2013-05-02 | 2016-05-04 | 精模电子科技（深圳）有限公司 | The preparation method of keyboard FPC |
| CN105589567B (en) * | 2015-11-04 | 2018-07-31 | 刘文仲 | Hit by hands formula spelling input keyboard and input method |
| CN108322224A (en) * | 2017-01-17 | 2018-07-24 | 群光电子股份有限公司 | Detection circuit |
| CN108322224B (en) * | 2017-01-17 | 2021-08-31 | 群光电子股份有限公司 | Detection circuit |
| CN109474282A (en) * | 2017-09-07 | 2019-03-15 | 光宝电子(广州)有限公司 | Key board unit |
| TWI648757B (en) * | 2018-06-19 | 2019-01-21 | 群光電子股份有限公司 | Anti-ghost button membrane switch device |
| CN114816081A (en) * | 2022-04-29 | 2022-07-29 | 长沙锐逸微电子有限公司 | Low-cost high-reliability keyboard implementation scheme |
| CN114816081B (en) * | 2022-04-29 | 2023-10-24 | 长沙锐逸微电子有限公司 | Low-cost high-reliability keyboard implementation method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070912 |
|
| EXPY | Termination of patent right or utility model |