CN102262488A - Static Capacity Type Input Device - Google Patents
Static Capacity Type Input Device Download PDFInfo
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- CN102262488A CN102262488A CN201110040210XA CN201110040210A CN102262488A CN 102262488 A CN102262488 A CN 102262488A CN 201110040210X A CN201110040210X A CN 201110040210XA CN 201110040210 A CN201110040210 A CN 201110040210A CN 102262488 A CN102262488 A CN 102262488A
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- Prior art keywords
- electrode
- touch
- static capacity
- ground
- input device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/0202—Constructional details or processes of manufacture of the input device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
- H04M1/236—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof including keys on side or rear faces
Abstract
The invention provides a static capacity type input device. Carrying out the input operation through finger touch reliably and sensibly on input devices carrying information terminals and the like can help the devices to be slim in shape. The static capacity type input device in the invention includes a touch base plate (32) provided with a touch electrode (32a) used to detect a position on a plane according to the change of the static capacity as well as a ground electrode (32b) used for the touch electrode (32a). A shift electrode (33a) is arranged opposite to the grounding electrode (32b) and in a separated gap (51) under the touch base plate (32). The shift electrode (33a) detects touches according to the change of static capacity brought by the shortening of the distance between the shift electrode (33a) and the grounding electrode (32b). A direction detecting part (A) and a touch detecting part (B) are arranged in a thickness direction, so as to realize multiple kinds of input operations.
Description
Technical field
The present invention relates to a kind of for example such capacitance type input device of electronic equipment such as mobile phone and PC (Personal Computer), PDA (Personal Digital Assistants), televisor, video recorder that is used for, in more detail, relate to the capacitance type input device of feeling ground or carrying out multiple input operation intuitively with finger.
Background technology
As the input media that carries out multiple input operation, following patent documentation 1 disclosed input media is arranged.It is the input media of following structure,, has the position coordinates pick-up unit of coordinate of the indicating positions that detects the position indicator on the input detection faces and the detection position indicator pressing force pick-up unit to the pressing force of described input detection faces that is.
And described position coordinates pick-up unit is made of the sensor of optical profile type, and described pressing force pick-up unit is made of the sensor of electrostatic capacitive.
But, when the detection principle of two kinds of pick-up units not simultaneously, need it be controlled with different IC.In this case, expend cost, aspect miniaturization, also can cause obstacle.
Patent documentation 1: TOHKEMY 2000-347807 communique
Such problem is by eliminating with sensor formation position coordinates pick-up unit and these the two kinds of pick-up units of pressing force pick-up unit that can operate and be reflected at reliably the identical electrostatic capacitive in the input operation intuitively.
Therefore, consider following structure, shown in Figure 14 (a), touch electrode 102 by the upper surface that is arranged on substrate 101 constitutes the position detection part 104 that is equivalent to described input coordinate pick-up unit with the 1st ground-electrode 103 that is arranged on the lower surface of described substrate 101, constitute the pressing detection portion 107 that is equivalent to described pressing force pick-up unit with displacement electrodes 105 that is separated from each other and the 2nd ground-electrode 106, with these test sections via insulation course 108 stacked on top of one another.
In addition, among Figure 14,109 are the key top, and 110 is spring, and 111 is substrate.In addition, about non-staple positions such as dielectric films, omit diagram.
But,, need reduce the initial static capacity of displacement electrodes 105 in order to ensure the sensitivity of described pressing detection portion 107.Therefore, should make between described displacement electrodes 105 and described the 1st ground-electrode 103 to space out, must thicken the thickness of described insulation course 108.But in the formation of Figure 14 (a), because not only ground-electrode 103,106 needs two, and described insulation course 108 is thicker, so, can not constitute input media than unfertile land.
Therefore, shown in Figure 14 (b), can consider to omit the formation of a ground-electrode.
That is,, and below this displacement electrodes 105, separate the gap and make the relative formation of ground-electrode 112 for the upper surface at substrate 101 has touch electrode 102, has displacement electrodes 105 at the lower surface of described substrate 101.Constitute according to this, the position probing that can point by touch electrode 102 and ground-electrode 112, and can carry out pressing detection by dwindling of the distance between displacement electrodes 105 and the ground-electrode 112.
But, in this formation, at described touch electrode 102 and be used between the described ground-electrode 112 of this touch electrode 102, presence bit shift electrode 105, so, when press...withing one's finger pressure, the distance between displacement electrodes 105 and the ground-electrode 111 is dwindled, and the distance between touch electrode 102 and the ground-electrode 112 is also dwindled.Therefore, the variation instability of the static capacity of position probing.Its result can not get precision, can not be reacted to the advantage of electrostatic capacitive such in the input operation reliably.
Summary of the invention
So major subjects of the present invention is, the ground and carry out multiple input operation reliably of feeling, and help the slimming of device.
Capacitance type input device for this reason possesses: touch baseplate part, it has the touch electrode that comes the position on the detection plane according to the variation of static capacity at upper surface, and has the ground-electrode that is used for described touch electrode at lower surface; Displacement electrodes, it is relative with described ground-electrode and separate the gap be provided with below described touch baseplate part, detects according to the variation of dwindling the static capacity of bringing of the distance between itself and the described ground-electrode and pushes.
When finger wait with described touch electrode near to or in contact with the time, the static capacity of described touch electrode changes, according to this change-detection position in the plane.At this moment, because the distance between described touch electrode and the described ground-electrode is certain, the vary stable of static capacity value.
In addition, when distance between described ground-electrode and the displacement electrodes was dwindled, the static capacity of described displacement electrodes changed, and can detect according to this variation and push.
That is, at least two kinds of input operations can be carried out by the action of finger etc. in position and irrelevant the disturbing of the detection of pushing action.
In addition, two kinds of input operations can be based on the variations of static capacity and are controlled with an IC.
This invention also can between described ground-electrode and the described displacement electrodes by the capacitance type input device of spring to the direction application of force of leaving.At this moment, described spring also can be crooked and form with the part of displacement baseplate part with described touch electrode, described ground-electrode and described displacement electrodes.
State by power that described spring is played a role is as original state, described spring suppresses finger rocking when waiting contact, and raising is operated and is felt.
Be preferably and between described ground-electrode and described displacement electrodes, clamp the capacitance type input device that the leaf spring that is made of the elastomeric element with electric conductivity and this leaf spring are electrically connected with described ground-electrode.
Described leaf spring can be brought into play desired acting force for a long time, and help slimming except similarly improving the operation thoughts and feelings with described spring.
In addition, this invention also can be for being provided with the capacitance type input device of connecting, disconnect the switch of switching by being pressed below described displacement electrodes.
By the switching of described switch, performance for example determines other functions such as function.
Preferred described switch is made of dome switch, and the electrode that is used for this dome switch is formed on the capacitance type input device of lower surface that upper surface has the displacement baseplate part of described displacement electrodes.
Because described electrode forms at the lower surface of the displacement baseplate part with described displacement electrodes, so described dome switch is installed for following with the top of domed shape.Therefore, can suppress component numbers such as substrate, and help slimming.
In addition, also can be for being provided with the capacitance type input device that drives and report the device for informing that has been pressed when distance between described ground-electrode and the displacement electrodes is dwindled.
Described device for informing can be made of vibrative Vib. or the electronics of sounding tone generator etc.The device for informing notice is the situation of pressed state, and the user is fed back sense.
As mentioned above, according to the present invention, can feel ground and carry out multiple input operation reliably.In addition, the slimming of all right implement device.
Description of drawings
Fig. 1 is the synoptic diagram of the longitudinal cross-section structure of expression major part of the present invention;
Fig. 2 is the stereographic map from the observed outward appearance of upper face side of expression input media;
Fig. 3 is the stereographic map from the observed outward appearance of following side of expression input media;
Fig. 4 is the stereographic map with portable information terminal of input media;
Fig. 5 be input media from the observed exploded perspective view of upper face side;
Fig. 6 be input media from the observed exploded perspective view of following side;
Fig. 7 is the longitudinal sectional drawing of the major part of input media;
Fig. 8 is the block diagram of the formation of expression portable information terminal;
Fig. 9 (a)～(d) is the key diagram of the action example of expression input media;
Figure 10 (a)～(c) is the key diagram of the detected state of expression input media;
Figure 11 is the longitudinal sectional drawing of the major part of another routine input media;
Figure 12 be another routine input media from the observed stereographic map of following side;
Figure 13 is the stereographic map that possesses the portable information terminal of another routine input media;
Figure 14 (a) and (b) are expression synoptic diagram by the structure of the input media of prior art consideration.
Symbol description
11 capacitance type input devices
32 touch baseplate part
The 32a touch electrode
The 32b ground-electrode
The 32d earthing contact
33 push baseplate part
The 33a displacement electrodes
51 gaps
61 metal dome switches
62,63 electrodes
64 dome type contacts
71 leaf springs
75 the 1st spring portions
76 the 2nd spring portions
91 Vib.s
Embodiment
Use the following drawings to describe to being used to implement a mode of the present invention.
Fig. 1 be the expression capacitance type input device 11 (below, be called " input media ") the synoptic diagram of longitudinal cross-section structure of major part, Fig. 2 is the stereographic map from the observed outward appearance of upper face side of expression input media 11, and Fig. 3 is the stereographic map of expression observed outward appearance of side below input media 11.This input media 11 uses as the input media 11 of for example portable information terminal 21 shown in Figure 4.
At first, portable information terminal 21 is illustrated simply.
This input media 11 is the formation of carrying out multiple input operation by the action of user's finger A (with reference to Fig. 1) with feeling.So-called multiple operation is meant, other operations such as operation, page turning and decision that the cursor of display 22 is moved.
Then, the structure to the input media 11 that can carry out such operation describes.
As Fig. 5, shown in Figure 6, input media 11 has the main element 31 that is made of a FPC (Frexible Printed Circuits).This main element 31 has the baseplate part 33 of touch successively, pushes baseplate part 33 and control basal plate portion 34 from front.And, described touch baseplate part 32 and described push between the baseplate part 33 and this is pushed between baseplate part 33 and the described control basal plate portion 34, be provided with flexible cable portion 35,36, and also extended flexible cable portion 37 from described control basal plate portion 34.Main element 31 also can be made of membrane type printed-wiring board (PWB) etc. except FPC.In addition, described cable portion 35,36,37 has flexibility, can flexibly carry out bending.
Described touch baseplate part 32 and push baseplate part 33 for constituting the part of described input part 12 is to overlap such state with described touch baseplate part 32 with push baseplate part 33 and remain on the metal holding member 41 at described cable portion 35 warpages.
Described touch baseplate part 32 forms circular when overlooking, as shown in Figure 1, have a plurality of touch electrode 32a that are used for coming the position on the detection plane at upper surface, have the ground-electrode 32b that is used for described touch electrode 32a at lower surface according to the variation of static capacity.Distance between these touch electrodes 32a and the ground-electrode 32b keeps certain.In addition, the touch electrode 32a of illustrated example is illustrated in figure 5 as 4 utmost points, have surrounding into 4 touch electrode 32aa, 32ab, 32ac, the 32ad that round mode sets, but so long as have plural electrode, number or configuration just can freely be set.
In addition, the upper and lower surface of this touch baseplate part 32 is insulated film 32c and covers, but as shown in Figure 6, is equipped with the earthing contact 32d that is electrically connected with described ground-electrode 32b in the part of the lower surface that touches baseplate part 32.
The described baseplate part 33 of pushing is overlooked and is seen and form general square shape.And, as shown in Figure 1, have described relatively ground-electrode 32b devices spaced apart 51 and relatively at upper surface, based on and described ground-electrode 32b between the variation of dwindling the static capacity of bringing of distance detect the displacement electrodes 33a that pushes.In addition, at the lower surface of pushing baseplate part 33, be equipped with ring electrode 62 and the circular electrode 63 that is used for metal dome switch 61 with concentric.Push on the baseplate part 33 at this, be coated with dielectric film 33c in the desirable position of upper and lower surface.
In described control basal plate portion 34,, be equipped with necessary electronic components such as integrated circuit (IC) 34a as Fig. 3, shown in Figure 6.
This main element 31 be assembled with as with between described ground-electrode 32b and the described displacement electrodes 33a to the leaf spring 71 of the spring of the departure direction application of force be arranged at the below of described displacement electrodes 33a and by pushing the described metal dome switch 61 that is out of shape the switch of connecting, disconnect switching, and be held on the described holding member 41.
Described leaf spring 71 will have the sheet metal stamping-out of electric conductivity and form.Be shaped as general square shape, cut and be formed with two elasticity foots 72.Two elasticity foots 72 form abreast, and extend in the opposite direction.In addition, leaf spring 71 needn't be defined as the metal manufacturing as long as be made of the elastomeric element with electric conductivity.
Described leaf spring 71 utilizes double-faced adhesive tape 81 to be fixed on the lower surface of described touch baseplate part 32.Fixedly the time, the described dome contacts 32d of the lower surface that touches baseplate part 32 is contacted at this with leaf spring 71.By being fixed on, leaf spring 71 touches on the baseplate part 32 front end of described two elasticity foots 72 and the described upper surface butt of pushing baseplate part 33.
In addition, have suitable protuberance 73 in the outer peripheral edges of described leaf spring 71, when remaining on described main element 31 on the described holding member 41, described protuberance 73 is used for relative holding member 41 and positions.
Described metal dome switch 61 constitutes by being arranged on described two electrodes 62,63 and dome type contact 64 of pushing the lower surface of baseplate part 33.Therefore, dome type contact 64 is installed top 64a downwards.This top 64a and teat 42 butts that are formed at the inner bottom surface of described holding member 41.
In addition, as shown in Figure 7, dome type contact 64 is kept by two pieces of thin plates 65,66, but on the thin plate 65 that covers in these thin plates 65,66, with dome type contact 64 and 64a corresponding position in top dome type contact 64 form porose 65a.The 65a of this hole portion is the hole portion that is used for the integral thickness of attenuate input media 11.By being provided with such 65a of hole portion, described top 64a directly with teat 42 butts of described holding member 41.In addition, among Fig. 5,66a is the vent port of the exhaust when being used for 64 distortion of dome type contact.
Described holding member 41 forms the described dish shape of pushing the size that baseplate part 33 and described leaf spring 71 enter by sheet metal being carried out punch process.And, have outstanding upward described projection 42 in inner bottom surface central authorities.
In addition, at the upright perisporium 43 that is provided with of the outer peripheral edges of holding member 41, the part that this perisporium 43 forms its medial surface is pushed the end face of protuberance 73 of the outer peripheral edges of described leaf spring 71, can carry out the shape of the location of leaf spring 71.And, in four angle parts of holding member 41, from the described perisporium 43 upright warpage sheets 44 that are provided with.By making this warpage sheet 44 warpage to the inside, keep described main element 31 etc.At this moment, keep to become the play a role mode of state of power of described leaf spring 71.
When remaining in described main element 31 grades on the holding member 41, become state shown in Figure 7.
In addition, on described touch baseplate part 32, be provided with key top 82 with insulativity.These key top 82 usefulness double-faced adhesive tapes 83 are fixing.
Except this key top 82, also can use sheet material (not having diagram), in addition, also can replace key top 82 and utilize the framework (do not have and illustrate) of equipment.
Fig. 8 is that expression possesses the block diagram of the formation of the portable information terminal 21 of the input media 11 of formation as mentioned above.
As mentioned above, portable information terminal 21 has input media 11, operating switch 23 and display 22, and possesses power supply unit 24 and storage part 25 etc.And the described parts that portable information terminal 21 has are connected with control part 26.Described input media 11 is connected with control part 26 via low-pass filter 27.
As mentioned above, described input media 11 has touch electrode 32a and displacement electrodes 33a, and described touch electrode 32a is by constituting to surround into described 4 touch electrode 32aa, 32ab, 32ac, the 32ad that round mode sets.And these touch electrodes 32a is connected with described integrated circuit 34a with displacement electrodes 33a, and this integrated circuit 34a is connected with described low-pass filter 27.
Described integrated circuit 34a will convert digital signal to by the static capacity value of each touch electrode 32aa, 32ab, 32ac, 32ad detection and the static capacity value that is detected by displacement electrodes 33a.
Described low-pass filter 27 does not detect this signal cut when the signal of the energising generation that receives moment from described input media 11, and only the signal that the long energising more than it is produced is delivered to control part 26.Thus, make the time, maloperation can not take place because of moment pressing operation input media 11 such as impact.
Described operating switch 23 will be passed to control part 26 based on the signal of user's operation.
Described power supply unit 24 is to each supply capability.
Described display 22 is according to the control signal display image of control part 26.In this image, have menu image and be kept at image in the storage part 25 etc.
Described storage part 25 carries out data write according to the control signal of control part 26.Has program of display menu picture etc. etc. in these data.
The ROM of stored program and the RAM of the data that storage action needs are housed in the described control part 26.
Use an example of the control action that Fig. 9 and Figure 10 explanation carries out based on the described control part 26 to the input operation of described input media 11.
Described input media 11 is according to touch location and the consequent load that is pressed into of the change-detection user's of the static capacity value of touch electrode 32a and displacement electrodes 33a finger A.Changes delta Ca, Δ Cb, Δ Cc, Δ Cd, the Δ Ce of each electrode 32aa, 32ab, 32ac, 32ad, 33a static capacity value separately, when being made as Ca, Cb, Cc, Cd respectively by the static capacity value that each touch electrode 32aa, 32ab, 32ac, 32ad detect, to be made as Ce by the static capacity value that displacement electrodes 33a detects, electrode 32aa, 32ab during with non-touch the, the static capacity value of 32ac, 32ad are made as Ca0, Cb0, Cc0, Cd0 respectively, in the time of will being made as Ce0 by the static capacity value that displacement electrodes 33a detects, by
ΔCa＝Ca-Ca0
ΔCb＝Cb-Cb0
ΔCc＝Cc-Cc0
ΔCd＝Cd-Cd0
ΔCe＝Ce-Ce0
Arithmetic expression calculate.
That is, the data of the static capacity value based on via non-touch of the signal of described integrated circuit 34a input and storage in advance the time, described control part 26 carries out the variation that static capacity is calculated in described computing.
And, according to this result, control part 26 further calculated touch location X, Y and be pressed into the load Z.Touch location X is left and right directions (touch electrode 32ab, 32ac and the opposed direction of touch electrode 32aa, 32ad), and touch location Y is above-below direction (touch electrode 32aa, 32ab and the opposed direction of touch electrode 32ac, 32ad), respectively can by
X＝(ΔCa+ΔCd)-(ΔCb+ΔCc)
Y＝(ΔCa+ΔCb)-(ΔCc+ΔCd)
Arithmetic expression calculate.
In addition, being pressed into load Z is obtained by the variation delta Ce of the static capacity value of displacement electrodes 33a.That is Z=Δ Ce.
By the change-detection touch location and the compression distance of the static capacity value of each one that calculates like this, control part 26 carries out the necessary control action according to program.
Specifically, the key that touches input part 12 surfaces at user's finger A with the degree that is no more than threshold value gently pushes up under the state of 82 (for example touching with the power less than 1N), shown in Fig. 9 (a), when touch electrode 32a was moved in the mode that dabs from left to right, the changes delta Ca of the static capacity value of each touch electrode 32aa, 32ab, 32ac, 32ad, Δ Cb, Δ Cc, Δ Cd changed respectively shown in Figure 10 (a).Its result obtains the information of touch location X, Y.
Judge the moving direction of finger A by this information, control part 26 carries out following control based on the signal of being imported, that is, and and shown in Fig. 9 (a), in the menu screen that in described display 22, shows etc., cursor 22a is moved from predefined reference position to the indicated direction of finger A.
Under same state, shown in Fig. 9 (b), when tiltedly down moving in the mode that dabs on tiltedly to the right from a left side, the changes delta Ca of the static capacity value of each touch electrode 32aa, 32ab, 32ac, 32ad, Δ Cb, Δ Cc, Δ Cd also change shown in Figure 10 (b), its result obtains the information of touch location X, Y.
Detect the moving direction of finger A by this information, control part 26 carries out following control based on the signal of being imported, that is, and and shown in Fig. 9 (b), in the menu screen that in described display 22, shows etc., cursor 22a is moved from predefined reference position to the indicated vergence direction of finger A.
After user's finger A touches (for example touching with the power more than the 1N) with the degree that surpasses threshold value than above-mentioned situation more, the action that flexiblely speeds away, specifically, shown in Fig. 9 (c), when using the such action of finger A page turning, based on the contact of the change-detection finger A of the static capacity of described touch electrode 32a, and based on the change-detection of the static capacity of described displacement electrodes 33a it is pushed.And, detecting under the state of pushing, detect the moving direction of finger A based on the variation of the static capacity of described touch electrode 32a.The changes delta Ca of the static capacity value of each one, Δ Cb, Δ Cc, Δ Cd, Δ Ce represent to change as Figure 10 (c).
And, control part 26 is according to based on touch location X, the Y of changes delta Ca, the Δ Cb of the static capacity value of each one, Δ Cc, Δ Cd, Δ Ce be pressed into the information of load Z, shown in Fig. 9 (c), to the control that just picture is moved to the next picture of the indicated direction of finger A in the menu screen that in described display 22, shows etc. in picture displayed.
When user's finger A firmly touches and when being pressed into such action, the ON Action that produces based on the distortion of the dome type contact 64 of described metal dome switch 61, in menu screen etc., the signal of the menu that decision is selected by cursor 22a etc. is passed to control part 26.At this moment, control part 26 is based on the connection signal of being imported, shown in Fig. 9 (d), for menu shown in the menu screen that determines to show in described display 22 etc. and that selected by cursor 22a etc., make the appearance change of its part, and the action of the necessary control of each one of carrying out.In when decision,, can obtain the click sense of rattling away because dome type contact 64 deforms.
Owing to carry out input operation like this, so except the moving of cursor, the operation that the page turning or the page move, determine is undertaken by an input media 11.That is, as shown in Figure 1, on thickness direction, have direction test section I, the II of pressing detection portion, be pressed into test section III, can carry out multiple input operation with these test sections.And, with the mode of in fact carrying out its action by finger A feel and carry out reliably that cursor moves, page turning, decision.
In addition, described touch electrode 32a and described ground-electrode 32b separately form at the upper surface of touch electrode 32 and lower surface, because the distance between them is certain, so can make the vary stable of the static capacity of touch electrode 32a.
And, make the ground-electrode 32b of described touch electrode 32a and described displacement electrodes 33a approaching when pressing key top 82, when the distance between described ground-electrode 32b and the displacement electrodes 33a was dwindled, the static capacity of described displacement electrodes 33a changed, and changed to detect based on this and pushed.The result, can carry out and the different actions of only carrying out such as page turning of action with touch electrode 32a detection, but this moment is because the distance of touch electrode 32a and ground-electrode 32b is certain, so, can prevent from position and the detection action of pushing are produced interference, can guarantee certainty, the reliability of operating.
And the detection principle that is used for carrying out these other actions has adopted identical static capacity, and therefore, it is enough with one for the integrated circuit 34a that described control basal plate portion 34 possesses.Therefore, can reduce manufacturing cost.
In addition, it is common to be used in the employed ground-electrode 32b of the detection of carrying out other action, and the position of ground-electrode 32b and displacement electrodes 33a and the direction of direction and metal dome switch 61 are studied, therefore, can take in described direction test section I, the described pressing detection II of portion and the described test section III that is pressed into effectively at thickness direction, can make the thickness attenuation of input media 11.Make the top 64a of dome type contact 64 expose the slimming that also helps input media 11.
In addition, main element 31 has described leaf spring 71 touching baseplate part 32 and push between the baseplate part 33, and with the state of the acting force of bringing into play this leaf spring 71 it is kept, so, can be suppressed at rocking under the original state.As a result, rocking when not having finger touch, operation feeling is good.
And, because leaf spring 71 is the metal manufacturing, can use at linear Hookean region, can obtain permanance.In addition, because used leaf spring 71, can form leaf spring 71 self than unfertile land, and, therefore, can help the thickness of attenuate input media 11 owing to have above-mentioned elasticity foot 72 of having cut like that.
In addition, owing to used the leaf spring 71 of electric conductivity, can show the relation of pressing force and distance point-blank.Therefore, also can represent pressing force and static capacity point-blank, be easy to control.In addition,,, therefore, do not accumulate electric charge on the leaf spring 71, can guarantee accuracy of detection because this leaf spring 71 is connected with described ground-electrode 32b by earthing contact 32d though used the leaf spring 71 of electric conductivity.
And metal leaf spring 71 so when remaining on described main element 31 on the holding member 41, compare with the situation of locating with main element 31, can carry out the location with respect to holding member 41 than the machining precision height of FPC exactly.
In addition, below described displacement baseplate part 33a, be provided with metal dome switch 61, as mentioned above,, can enlarge function as input media 11 owing to also can carry out other action.
In addition, owing to used metal dome switch 61,, be fit to as determine the action of selected item above-mentionedly so can obtain the sense of rattling away of clear and definite click.Described leaf spring 71 by bonding when touching baseplate part 32 distortion integrated and dome type contact 64 by metal dome switch 61 and connect, leaf spring 71 stops as the effect of spring and becomes rigid body, the sense of rattling away of clear and definite thus click becomes better.
In addition, metal dome switch 61 utilizes the described top 64a that pushes baseplate part 33 and make dome type contact 64 towards installing down, so can reduce the component number of coincidence.Therefore, help slimming more.
Below, alternate manner is described.In this explanation, mark identical symbol and omit its detailed explanation for the position identical or equal with above-mentioned formation.
Figure 11 is a part of bending of the expression FPC that will constitute described main element 31 and form the example of the spring between described ground-electrode 32b and the described displacement electrodes 33a.That is, the touch baseplate part 32 of described main element 31 and the cable portion 35 of pushing between the baseplate part 33 are bent to the semicircle arcuation, form rubber-like the 1st spring portion 75.In addition, the front of described touch baseplate part 32 be formed with that leading section 76a joins with the described upper surface of pushing baseplate part 33 and with described the 1st spring portion 75 the 2nd springs 76 relative, that bend to the semicircle arcuation.In the 1st spring portion 75 and the 2nd spring 76, the electric conductor (not having diagram) that constitutes FPC is mainly brought into play elastic force.
In the input media 11 that constitutes like this, do not need the described spring members 71 of split, so can reduce component number, realize the reduction of cost.Therefore in addition, the 1st spring portion 75 is formed on relative position with the 2nd spring portion 76, can stably carry out elastic displacement, that is, and and the dwindling of the distance between described ground-electrode 32b and the described displacement electrodes 33a.
Figure 12 is the device for informing that drives and report the information that has been pressed when dwindling as distance between described ground-electrode 32b and displacement electrodes 33a, is provided with the input media 11 of Vib. 91.
Though device for informing can be made of vibrative the Vib. 91 or electronics tone generator of sounding etc., in order to feel the input operation carried out of action of finger A, the formation of preferred described Vib. 91.The vibration that utilizes Vib. 91 to produce, the user can actually feel the situation of pushing by the feedback sense, can more carry out correct operation with feeling.
As shown in figure 12, Vib. 91 is installed in the suitable positions such as bottom surface of holding member 41.Except Vib. 91, also can use the Vib. (not having diagram) that portable information terminal 21 (with reference to Fig. 4) is possessed instead with such special use.
Figure 13 is that expression possesses in the mode of the position of the rectilinear direction (directions X) on can detection plane and plural touch electrode 32a arranged on a direction and the example of the portable information terminal 21 of the input media 11 that constitutes.
In the input media 11 that constitutes like this, also with the above-mentioned ground and carry out multiple input operation reliably of similarly can feeling.In addition, miniaturization that also can implement device.
In the formation of the formation of this invention and an above-mentioned mode corresponding,
The spring of this invention is corresponding with the leaf spring of above-mentioned formation the 71, the 1st spring the 75, the 2nd spring 76,
Switch, dome switch are corresponding with described metal dome switch 61,
Device for informing is corresponding with Vib. 91,
This invention is not limited in above-mentioned formation, also can adopt other mode.
For example, the action of the input operation that input media carries out can be the action beyond the above-mentioned example, and the variation specified coordinate of static capacity that also can be by touch electrode 32a is controlled.
In addition, also can omit metal dome switch 61.Also metal dome switch 61 be can replace and for example touch-switch (tact switch) (registered trademark of Alps electric (strain)) or various switches such as diaphragm switch, pressure-sensitive switch used.
In addition, input also can be with carrying out beyond the finger.
Claims (7)
1. capacitance type input device, it possesses:
Touch baseplate part, it has the touch electrode that comes the position on the detection plane according to the variation of static capacity at upper surface, and has the ground-electrode that is used for described touch electrode at lower surface;
Displacement electrodes, it is relative with described ground-electrode and separate the gap be provided with below described touch baseplate part, detects according to the variation of dwindling the static capacity of bringing of the distance between itself and the described ground-electrode and pushes.
2. capacitance type input device as claimed in claim 1, wherein, between described ground-electrode and the described displacement electrodes by spring to the direction application of force of leaving.
3. capacitance type input device as claimed in claim 1 wherein, clamp the leaf spring that is made of the elastomeric element with electric conductivity between described ground-electrode and described displacement electrodes, and this leaf spring is electrically connected with described ground-electrode.
4. capacitance type input device as claimed in claim 2, wherein, it is crooked and form that described spring will have the part of substrate of described touch electrode, described ground-electrode and described displacement electrodes.
5. as each described capacitance type input device in the claim 1～4, wherein, below described displacement electrodes, be provided with the switch of connecting, disconnect switching by being pressed.
6. capacitance type input device as claimed in claim 5, wherein, described switch is made of dome switch, and the electrode that is used for this dome switch is formed on the lower surface that upper surface has the displacement baseplate part of described displacement electrodes.
7. as each described capacitance type input device in the claim 1～4, wherein, be provided with and drive and report the device for informing that has been pressed when distance between described ground-electrode and the displacement electrodes is dwindled.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010118224A JP2011248439A (en) | 2010-05-24 | 2010-05-24 | Capacitance type input device |
| JP118224/10 | 2010-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102262488A true CN102262488A (en) | 2011-11-30 |
Family
ID=45009135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110040210XA Pending CN102262488A (en) | 2010-05-24 | 2011-02-18 | Static Capacity Type Input Device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2011248439A (en) |
| KR (1) | KR20110128724A (en) |
| CN (1) | CN102262488A (en) |
| TW (1) | TW201214255A (en) |
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| CN103995629A (en) * | 2013-02-19 | 2014-08-20 | 阿尔卑斯电气株式会社 | Static capacitor input typed device |
| CN105022544A (en) * | 2015-07-28 | 2015-11-04 | Tcl移动通信科技（宁波）有限公司 | Capacitive touch screen, mobile terminal and control method |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201214255A (en) | 2012-04-01 |
| KR20110128724A (en) | 2011-11-30 |
| JP2011248439A (en) | 2011-12-08 |
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Application publication date: 20111130 |