CN102006048B - Key detecting board - Google Patents
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- CN102006048B CN102006048B CN 201010605748 CN201010605748A CN102006048B CN 102006048 B CN102006048 B CN 102006048B CN 201010605748 CN201010605748 CN 201010605748 CN 201010605748 A CN201010605748 A CN 201010605748A CN 102006048 B CN102006048 B CN 102006048B
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Abstract
A key detecting board comprises a body and a plurality of detecting keys, wherein the detecting keys include a first detecting key positioned at one side of the body and a second detecting key positioned at the side of the board; the first detecting key comprises a plurality of detecting subkeys; the area of any one detecting subkey on the surface of the body is different from the areas of other detecting subkeys; and the second detecting key semi-encloses the first detecting key. The key detecting board provided by the invention can reduce the calculated amount of the processing chips and reduce the power consumption.
Description
Technical field
The present invention relates to the touch field, particularly a kind of key detection board.
Background technology
Along with the development of electronic technology, button is fast owing to its reaction, application is wide, adapt to adverse circumstances is widely used in household electrical appliance or the consumer electronic product, thereby the chance that the user uses button to operate is also more and more.For example, the user can call or editing short message by the keyboard of portable terminal, and the button by television set carries out television channel to be selected, and the button by DVD carries out F.F., retreat or the selection of volume etc.
Number of patent application is to disclose a kind of capacitance key of responding to user's finger contacts in the United States Patent (USP) of US2005/0179673A1, existing capacitance key generally includes key detection board and the keyboard corresponding with the key detection version, please refer to Fig. 1, Fig. 1 is existing button schematic diagram, comprise: keyboard 10, described keyboard 10 is used for receiving user instruction, described keyboard 10 surfaces have the button (generally being expressed as diagram or literal) of prompting user usually, for example begin or begin diagram, the diagram of advancing or advance, the diagram that stops or stopping ...; Key detection board 20, when the user touches or puts the button on beating keyboard 10 surfaces, the user instruction that the detecting keyboard receives, and user instruction is converted to working signal transfers to the process chip (not shown) that is connected with key detection board 20, described key detection board 20 comprises plate body 21 and detecting key 22, and described plate body 21 is generally printed circuit board (PCB) (Printed Circuit Board; PCB) or flexible print circuit (Flexible Printed Circuit; FPC) plate, described plate body 21 provides platform for carrying detecting key 22 and for process chip provides interface, described detecting key 22 is positioned at the surface of plate body 21, is used for the detecting keyboard and receives user instruction, and transmit described working signal.
But, along with further developing of electronic technology, the user of existing key detection board need touch the button on keyboard 10 surfaces and could work, and be in high temperature or other maximal work environment can't be suitable at keyboard 10, and existing key detection board antijamming capability is relatively poor, button resolution is low, can't satisfy the era development requirement.
Summary of the invention
The problem that the present invention solves provides a kind of new key detection board, can simplify button and judge the process of identification, the solution keyboard is in high temperature or other maximal work environment can't application and the relatively poor poor anti jamming capability problem of key detection board antijamming capability.
For addressing the above problem, the invention provides a kind of key detection board, comprising: plate body; A plurality of detecting keys, described detecting key comprise, are positioned at the first detecting key of a side of described plate body, and described the first detecting key comprises a plurality of son detecting keys, and arbitrary son detecting key mapping is different from other son detecting keys in the area on plate body surface; Be positioned at the second detecting key of plate body side, and described the first detecting key of described the second detecting key semi-surrounding.
Optionally, described plate body also comprises process chip.
Optionally, the area of described the first detecting key mapping in the plate body surface is directly proportional with the distance of process chip with described the first detecting key.
Optionally, described plate body has working face and the proximal surface adjacent with working face, and described the first detecting key mapping is in working face and the proximal surface of described plate body.
Optionally, described the first detecting has air partition between the key.
Optionally, be positioned at the 3rd detecting key on plate body surface, and arbitrary son detecting key by the 3rd detecting key around.
Optionally, described the 3rd the detecting key be sheet metal.
Optionally, described the 3rd detecting key links to each other with process chip by plain conductor, and described the 3rd detecting key is used for judging user's invalid operation.
Compared with prior art, the present invention has the following advantages: key detection board provided by the invention does not need to arrange the keyboard that is electrically connected with key detection board, and the user need not to contact described key detection board or keyboard just can send instruction to described key detection board, and key detection board of the present invention can be high temperature or other maximal work environmental works.
And key detection board provided by the invention has the first detecting key of a side that is positioned at described plate body, described the first detecting key comprises a plurality of son detecting keys, and arbitrary son detecting key mapping is different from other son detecting keys in the area on plate body surface, difficulty in computation in the time of can reducing process chip and calculate the ratio of the change in electrical charge amount of each charge accumulation area and charge balance amount, and key detection board of the present invention has the second detecting key of described the first detecting key of semi-surrounding, described the second detecting key can change identification user finger to be closed on by the electric charge magnitude of recruitment in the charge accumulation area corresponding with the second detecting key, and for pointing, the first detecting key identification user a little tactilely provides reference, further reduce the amount of calculation of process chip, reduce power consumption.
Further, key detection board of the present invention also has the 3rd detecting key around arbitrary son detecting key, and described the 3rd detecting bond energy is enough judged user's invalid operation, reduces the probability of key detection board misoperation of the present invention.
Description of drawings
Fig. 1 is existing button schematic diagram;
Fig. 2 is key detection board the first embodiment schematic diagram of the present invention;
Fig. 3 is an embodiment schematic diagram that has the key detection board of air partition between the first detecting key;
Fig. 4 is an embodiment schematic diagram that is provided with the key detection board of process chip;
Fig. 5 is key detection board the second embodiment schematic diagram of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can more be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Set forth detail in the following description so that fully understand the present invention.But the present invention can be different from alternate manner described here and implements with multiple, and those skilled in the art can do similar popularization in the situation of intension of the present invention.Therefore the present invention is not subjected to the restriction of following public embodiment.
The present inventor has proposed the imagination of air touch key-press based on many defectives of existing capacitive touch screen and RM thereof.By making up special membrane keyboard structure so that when carrying out touch operation, operator's finger can need not to touch actual touch-screen or keyboard, the button on common keyboard 10 surfaces is electrically connected with the detecting key on the detecting board, need the user to touch the button on keyboard 10 surfaces, being electrically connected with the detecting key by button could be by the detecting of detecting key; And the air touch key-press that the present inventor proposes, described touch key-press need not the user and is electrically connected with the detecting key, changes the key command that the CHARGE DISTRIBUTION of detecting on the key is responded to the user during according to the close described detecting key of user; And, based on described membrane keyboard structural design accordingly to supply power mode and the touch identification method of membrane keyboard structure, so that touch operation is identified more accurately.Concrete air touch key-press structure comprises: keyboard; Detecting board, have detecting key corresponding to key position a plurality of and keyboard on the described detecting board, described detecting board and described keyboard insulation isolation, when using, the user touches key dish or near keyboard the time corresponding to having triggering signal, be positioned on the detecting board or the analytical test chip that is connected with the detecting board interface carries out discriminatory analysis to described triggering signal, determine which button is triggered and trigger corresponding function, further, air touch key-press structure can arrange keyboard or keyboard is not set, when keyboard was set, the detecting key of described keyboard and detecting board was without being electrically connected.
Concrete, the principle that button is judged is: the detecting key of described detecting board is filled with quantitative electric charge, and each quantity of electric charge that is filled with of detecting key can be the same or different; Described detecting key forms charge accumulation area, when the user approaches the detecting key, change the change in electrical charge amount of charge accumulation area corresponding to detecting key and the ratio of charge balance amount, described detecting key is transferred to this ratio and the analytical test chip of detecting key and being connected, and the analytical test chip judges whether the user triggers this button.
With the change in electrical charge amount of charge accumulation area corresponding to calculating detecting key and the ratio of charge balance amount, be example with change in electrical charge amount maximum and the change in electrical charge amount recognition by pressing keys corresponding with the charge accumulation area of the ratio maximum of charge balance amount for the button that is touched, when the key position of keyboard faces touch or closes on touch, charge accumulation area corresponding to detecting key carried out electric charge replenish, until the quantity of electric charge of respectively detecting in charge accumulation area corresponding to key reaches balance; Calculate the change in electrical charge amount of each charge accumulation area when the key position of described keyboard faces touch with the electric charge magnitude of recruitment in charge accumulation area corresponding to each detecting key, and the ratio that calculates change in electrical charge amount and the charge balance amount of each charge accumulation area; Change in electrical charge amount maximum and the change in electrical charge amount recognition by pressing keys corresponding with the charge accumulation area of the ratio maximum of charge balance amount are the button that is touched.
But find under study for action, adopt the detecting board structure of onesize detecting key in the processing procedure of carrying out the button judgement, amount of calculation is larger, and the recognition by pressing keys process is longer, and analytical test chip amount of calculation is large, cause the power consumption of analytical test chip, committed memory is large.
For this reason, the present inventor proposes a kind of key detection board of optimization, comprising: plate body; A plurality of detecting keys, described detecting key comprise, are positioned at the first detecting key of a side of described plate body, and described the first detecting key comprises a plurality of son detecting keys, and arbitrary son detecting key key mapping is different from other son detecting keys in the area on plate body surface; Be positioned at the second detecting key of plate body side, and described the first detecting key of described the second detecting key semi-surrounding.
Described plate body is ito thin film, conductive film, printed circuit board (PCB) or flexible printed circuit board, described plate body also comprises and is positioned at plate body or plate body plain conductor surperficial, that link to each other with the detecting key, be positioned at plate body, by plain conductor and the port that links to each other of detecting key, described port is used for the connection process chip.
Need to prove that key detection board of the present invention can be applicable to the air type button, can also be applied to prior art.Described air type button refer to human body not can with detecting board on the button of detecting key contacts.
Further, key detection board of the present invention can also be as the detecting antenna of process chip, described process chip is arranged in the plate body or by the interface that is arranged in the plate body and links to each other with plate body, material by the selection key detecting board, setting is positioned at plain conductor trend and the thickness of key detection board, the arrangement of detecting key and the arrangement of thickness and port, so that key detection board can be surveyed the frequency of default frequency band, and the material by the selection key detecting board, setting is positioned at plain conductor trend and the thickness of key detection board, the arrangement of detecting key and the arrangement of thickness and port, be fixed on another default frequency band so that the user puts tactile or approaches the detecting key, reduce the analysis difficulty of analysis chip.
Below in conjunction with a specific embodiment key detection board of the present invention is elaborated.
Please refer to Fig. 2, Fig. 2 is key detection board the first embodiment schematic diagram of the present invention, comprise: plate body 100, described plate body 100 can be printed circuit board (PCB) or flexible printed circuit board, in the present embodiment, select printed circuit board (PCB), described plate body 100 is flat cuboid, have working face I and proximal surface II, and described working face I adjacent with proximal surface II, and described working face is generally the surface that is parallel to printed circuit board (PCB) interior metal wiring side, described printed circuit board (PCB) is usually by the medium of multilayer and wiring layer is stacking forms, described working face is the surface that is parallel to the wiring layer of printed circuit board (PCB), perpendicular to stacking direction.
Detecting key 110, be used for detecting user instruction (be user put touch or approach), and user instruction is converted to working signal, working signal transfers to the process chip (not shown) that is connected with interface 119 by plain conductor 118, described detecting key 110 is sheet metal, in the present embodiment, be preferably Copper Foil.
Described detecting key 110 comprises: the first detecting key that is positioned at a side of described plate body 100, in the present embodiment, describedly comprise a plurality of discrete sons detecting keys with the first detecting key, has the first son detecting key 111 to have described the first detecting key, the second son detecting key 112, the 3rd son detecting key 113, the 4th son detecting key 114, the 5th son detecting key 115, the 6th son detecting key 116 is done exemplary illustrated for example, the area that is positioned at plate body 100 surfaces of arbitrary son detecting key is different from other son detecting keys, wherein, the first son detecting key 111 is positioned at the area that the area that the area on plate body surface＞second son detecting key 112 is positioned at the plate body surface＞the 3rd son detecting key 113 is positioned at the plate body surface＞the 4th son detecting key mapping and is positioned at the area on plate body surface＞the 6th son detecting key 116 in the area on plate body surface＞the 5th son detecting key 115 and is positioned at the area on plate body surface; Thereby so that adopt the key detection board detecting user touches key dish of present embodiment or near keyboard the time, have larger difference with the electric charge magnitude of recruitment in charge accumulation area corresponding to each son detecting key, when process chip is calculated the ratio of the change in electrical charge amount of each charge accumulation area and charge balance amount, so that the change in electrical charge amount of each son detecting key and the ratio of charge balance amount have obvious difference, when process chip recognition by pressing keys that change in electrical charge amount maximum and change in electrical charge amount is corresponding with the charge accumulation area of the ratio maximum of charge balance amount when being touched button, the recognition differential opposite sex of each son detecting key is larger, disconnected phenomenon can not occur judging by accident.
Further, the first detecting key mapping of present embodiment is in working face I and the proximal surface II of described plate body 100, consider that described plate body 100 is flat cuboid, proximal surface II is longer and narrower, from visually seeing detecting key 101 covered section proximal surface II (bound edge), also need to prove, in this enforcement, the son detecting key number of the first detecting key is 6, correspond to the beginning key, stop key, Pause key, fast forward button, fast backspace key and volume key, and in other embodiments, the son detecting key number of the first detecting key is not limited to 6, can be 2,3,4,5,7,8,9 ... .32, corresponding function also can be established for example unlatching of TV according to the scope that key detection board is used, close, channel selection; The perhaps unlatching of microwave oven, stop, the time is set, Temperature Setting; The perhaps unlatching of washing machine, stop, program for washing selects; The perhaps keyboard of computer input, for example Q, W, E, R, F1, Ctrl or Alt key function etc.
Still with reference to figure 2, described detecting key 110 also comprises: the second detecting key 117 that is positioned at plate body 100 sides, and described the first detecting key of described the second detecting key 117 semi-surroundings, in the present embodiment, described the second detecting key 117 is positioned at described plate body 100, be not formed with three sides of the first detecting key, to described the first detecting key semi-surrounding, described the second detecting key 117 is sheet metal, be preferably Copper Foil, need to prove, described the second detecting key 117 is used for detecting user finger and closes on key detection board, be that the user points surface or the side that is positioned at key detection board, described the second detecting key 117 can change identification user finger to be closed on by the electric charge magnitude of recruitment in the charge accumulation area corresponding with the second detecting key 117, and a little touch or approachingly provide reference for the first detecting key identification user points, further reduce the amount of calculation of process chip, reduce power consumption.
Described plate body 100 also comprise be positioned at plate body 100 or plate body 100 surfaces, with the first detecting key and the second plain conductor 118 of linking to each other of detecting key 117, be positioned at plate body 100, by plain conductor 118 and the first detecting key and the second port one 19 of linking to each other of detecting key 117, described port one 19 is used for the connection process chip.
Preferably, please refer to Fig. 3, also be formed with groove between each height detecting key of described the first detecting key, namely pass through air partition, particularly, plate body 100 is " Great Wall " shape, has body 210 and protuberance 220, body 210 is flat cuboid, protuberance 220 is the battlement on Great Wall, and described the first detecting key mapping is in described protuberance 220 first surfaces and second surface, and described first surface and second surface are interconnected two faces, the first detecting key is sheet metal, is preferably Copper Foil.
The preferred version of present embodiment can further improve each first detecting key recognition differential opposite sex, and the electric charge magnitude of recruitment otherness in the charge accumulation area that namely each the first detecting key is corresponding further improves.
Also need to prove, please refer to Fig. 4, described plate body 100 is interior can also to be provided with process chip 200, when described plate body 100 direct set handling chip 200, described process chip 200 is positioned at the other end of the described plate body 100 relative with the first detecting key, and described the first detecting key mapping is detected key in the area on plate body 100 surfaces and described first and is directly proportional with distance between the process chip 200, distance between described the first detecting key and process chip 200 is first to detect the distance of the center of the center of key and process chip, concrete, the first son detecting key 111 is positioned at the area maximum on plate body surface, the distance of the first son detecting key 111 and described process chip 200 farthest, the 6th son detecting key 116 is positioned at the area minimum on plate body surface, the 6th son detecting key 116 is nearest with described process chip 200, those skilled in the art can arrange according to the practical application of key detection board the distance of each first detecting key and the first detecting key and described process chip, when but the area of described the first detecting key mapping in plate body 100 surfaces was directly proportional with the distance of process chip 200 with described the first detecting key, the identification user pointed a little tactile more excellent.
The present inventor also proposes a kind of key detection board of optimization, and Fig. 5 is key detection board the second embodiment schematic diagram of the present invention, comprising: plate body 300; A plurality of detecting keys 310, described detecting key 310 comprises, be positioned at the first detecting key of a side of described plate body 300, described the first detecting key comprises a plurality of son detecting keys (301～306), and arbitrary son detecting key mapping is different from other son detecting keys in the area on plate body 300 surfaces; Be positioned at the second detecting key 312 of plate body side, and described the first detecting key 311 of described the second detecting key 312 semi-surroundings; Be positioned at the 3rd detecting key 313 on plate body surface, and arbitrary son detecting key by the 3rd detecting key 313 around.
Particularly, described plate body 300 can be with reference to the first embodiment, described plate body 300 can be printed circuit board (PCB) or flexible printed circuit board, in the present embodiment, select printed circuit board (PCB), described plate body 300 is flat cuboid, have working face I and proximal surface II, in the present embodiment, described working face I is first surface, proximal surface II is second surface, and described working face I and proximal surface II are connected to each other, and described working face is generally the surface that is parallel to printed circuit board (PCB) interior metal wiring side, and described printed circuit board (PCB) is usually by the medium of multilayer and wiring layer is stacking forms, described working face is the surface that is parallel to the wiring layer of printed circuit board (PCB), perpendicular to stacking direction.
Described detecting key 310, be used for detecting keyboard (not shown) and receive user instruction (be the user puts tactile), and user instruction is converted to working signal, working signal transfers to process chip 200 by plain conductor 318, described detecting key 310 is sheet metal, in the present embodiment, be preferably Copper Foil.
In the present embodiment first detecting key 311 and second is detected the effect of key 312 and arranged can be with reference to the first embodiment, same, when described plate body 300 surfaces had process chip 200, the area that described the first detecting key 311 is positioned at plate body 300 surfaces was directly proportional with the distance of process chip 200 with described the first detecting key.
In this enforcement, additionally be provided with the 3rd detecting key 313, described the 3rd detecting key 313 is sheet metal, in the present embodiment, be preferably Copper Foil, described the 3rd detecting key 313 is around arbitrary son detecting key, described the 3rd detecting key 313 is used for detecting the action of adjacent son detecting key, particularly, when user's finger is positioned between two adjacent son detecting keys, also can cause the electric charge magnitude of recruitment otherness in the charge accumulation area corresponding with two adjacent son detecting keys, at this moment, process chip is easy to think by mistake to be that the user clicks, thereby cause misoperation, for this reason, described the 3rd detecting key 313 is set to around arbitrary son detecting key, and described the 3rd detecting key 313 and the isolation of son detecting key electricity, when user's finger is positioned between two adjacent son detecting keys, process chip 200 can the electric charge magnitude of recruitment otherness from the charge accumulation area corresponding with the 3rd detecting key 313 judge it is user's invalid operation, thereby avoid not having the 3rd detecting during key, process chip is positioned over user's finger between two adjacent son detecting keys and causes misoperation.
Key detection board provided by the invention does not need to arrange the keyboard that is electrically connected with key detection board, and the user need not to contact described key detection board or keyboard just can send instruction to described key detection board, and key detection board of the present invention can be high temperature or other maximal work environmental works.
And key detection board provided by the invention has the first detecting key of a side that is positioned at described plate body, described the first detecting key comprises a plurality of son detecting keys, and arbitrary son detecting key mapping is different from other son detecting keys in the area on plate body surface, difficulty in computation in the time of can reducing process chip and calculate the ratio of the change in electrical charge amount of each charge accumulation area and charge balance amount, and key detection board of the present invention has the second detecting key of described the first detecting key of semi-surrounding, described the second detecting key can change identification user finger to be closed on by the electric charge magnitude of recruitment in the charge accumulation area corresponding with the second detecting key, and for pointing, the first detecting key identification user a little tactilely provides reference, further reduce the amount of calculation of process chip, reduce power consumption.
Further, key detection board of the present invention also has the 3rd detecting key around arbitrary son detecting key, and described the 3rd detecting bond energy is enough judged user's invalid operation, reduces the probability of key detection board misoperation of the present invention.
Although the present invention with preferred embodiment openly as above; but it is not to limit the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made possible change and modification; therefore; every content that does not break away from technical solution of the present invention; to any simple modification, equivalent variations and modification that above embodiment does, all belong to the protection range of technical solution of the present invention according to technical spirit of the present invention.
Claims (8)
1. air touch key-press detecting board comprises:
Plate body;
It is characterized in that, also comprise:
A plurality of detecting keys, described detecting key is filled with quantitative electric charge, form charge accumulation area, when the user approaches the detecting key, change the change in electrical charge amount of charge accumulation area corresponding to detecting key and the ratio of charge balance amount, described detecting key is transferred to this ratio and the analytical test chip of detecting key and being connected, and the analytical test chip judges whether the user triggers this button; Described detecting key comprises, is positioned at the first detecting key of a side of described plate body, and described the first detecting key comprises a plurality of son detecting keys, and arbitrary son detecting key mapping is different from other son detecting keys in the area on plate body surface; Be positioned at the second detecting key of plate body side, and described the first detecting key of described the second detecting key semi-surrounding, when the key position of keyboard faces touch or closes on touch, charge accumulation area corresponding to the different detecting key of each area carried out electric charge replenish, until the quantity of electric charge in charge accumulation area corresponding to the different detecting key of each area reaches balance; Calculate the change in electrical charge amount of each charge accumulation area when the key position of described keyboard faces touch with the electric charge magnitude of recruitment in charge accumulation area corresponding to the different detecting key of each area, and the ratio that calculates change in electrical charge amount and the charge balance amount of each charge accumulation area; Change in electrical charge amount maximum and the change in electrical charge amount recognition by pressing keys corresponding with the charge accumulation area of the ratio maximum of charge balance amount are the button that is touched.
2. key detection board as claimed in claim 1 is characterized in that, described plate body also comprises process chip.
3. such as claim 1 or 2 described key detection boards, it is characterized in that described the first detecting key mapping is directly proportional with the distance of process chip with described the first detecting key in the area on plate body surface.
4. key detection board as claimed in claim 1 is characterized in that, described plate body has working face and the proximal surface adjacent with working face, and described the first detecting key mapping is in working face and the proximal surface of described plate body.
5. key detection board as claimed in claim 1 is characterized in that, has air partition between described the first detecting key.
6. key detection board as claimed in claim 1 is characterized in that, also comprises: be positioned at the 3rd detecting key on plate body surface, and arbitrary son detecting key by the 3rd detecting key around.
7. key detection board as claimed in claim 6 is characterized in that, described the 3rd detecting key is sheet metal.
8. key detection board as claimed in claim 7 is characterized in that, described the 3rd detecting key links to each other with process chip by plain conductor, and described the 3rd detecting key is used for judging user's invalid operation.
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| CN101833121A (en) * | 2010-04-09 | 2010-09-15 | 深圳市汇顶科技有限公司 | Double-coupling detection circuit, rain sensor and rain identification method |
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| JP2005084982A (en) * | 2003-09-09 | 2005-03-31 | Pentel Corp | Electrostatic capacitance type touch panel device |
| US7323886B2 (en) * | 2004-08-16 | 2008-01-29 | Ying Lau Lee | Linear capacitance measurement and touchless switch |
| US20060097992A1 (en) * | 2004-10-25 | 2006-05-11 | Motorola, Inc. | Apparatus and method of determining a user selection in a user interface |
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