CN107196635A - The touch key-press circuit of new trend controller - Google Patents
The touch key-press circuit of new trend controller Download PDFInfo
- Publication number
- CN107196635A CN107196635A CN201710437924.1A CN201710437924A CN107196635A CN 107196635 A CN107196635 A CN 107196635A CN 201710437924 A CN201710437924 A CN 201710437924A CN 107196635 A CN107196635 A CN 107196635A
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- electric capacity
- light emitting
- emitting diode
- touch
- touch key
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- 239000003990 capacitor Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- 230000007717 exclusion Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/96—Touch switches
- H03K2217/96015—Constructional details for touch switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/96—Touch switches
- H03K2217/96042—Touch switches with illumination
- H03K2217/96046—Key-pad combined with display, back-lit
Landscapes
- Push-Button Switches (AREA)
Abstract
Present invention is disclosed a kind of touch key-press circuit of new trend controller, the touch key-press circuit includes the first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4, 5th electric capacity C5, touch IC, MCU, resistor chain group for current limliting, first light emitting diode D1, second light emitting diode D2, 3rd light emitting diode D3 and the 4th light emitting diode D4, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4 and the 5th electric capacity C5 is in parallel, first electric capacity C1 the second end is electrically connected with touching IC TP0 ends, second electric capacity C2 the second end is electrically connected with touching IC TP1 ends, 3rd electric capacity C3 the second end is electrically connected with touching IC TP2 ends, 4th electric capacity C4 the second end is electrically connected with touching IC TP3 ends.The new trend controller touch key-press circuit cost is low, simple in construction, applied widely, can industrially promote the use of.
Description
Technical field
The present invention relates to a kind of touch key-press circuit of new trend controller, belong to VMC technical field.
Background technology
Mechanical key is because its is cheap, accessory circuit simple and operation is simply widely used in home appliance
On, but its shortcoming is also clearly.Mechanical key due to its conducting is made up of the contact of reed and the reset of spring, so
The problem of just bringing easy physical damage, when the button is pressed, it is necessary to have a power effect, so that mechanical key
Hole position must be left between shell, the overall aesthetics of equipment surface is thus inevitably destroyed.
Touch key-press is more permanent due to service life, and high-grade attractive in appearance, so be widely used in home appliance,
But because it is higher to the stability requirement of power supply, if there is larger ripple in use, easily it is misused.If touching
Control source is fluctuated to the distance of panel in touch-control apart from critical point, and the phenomenon of false touch also occurs.
New trend controller is more special due to the environment that it is used, and its power supply often can be by the fresh air purifier high pressure of line traffic control
Electrostatic influence is arrived, and touch-control IC is inevitably interfered, and the phenomenon of false touch also occurs once in a while.
The content of the invention
There is provided a kind of new trend controller in order to solve the above-mentioned problems in the prior art for the purpose of the present invention
Touch key-press circuit.
The purpose of the present invention will be achieved by the following technical programs：The touch key-press circuit of new trend controller, this is touched
Touch key circuit including the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, touch IC,
MCU, the resistor chain group for current limliting, the first light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3 and
4th light emitting diode D4, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 and the 5th electric capacity C5
Parallel connection, the second end of the first electric capacity C1 is electrically connected with touching IC TP0 ends, and the second end of the second electric capacity C2 is with touching
IC TP1 ends electrical connection, the second end of the 3rd electric capacity C3 is electrically connected with touching IC TP2 ends, the 4th electric capacity C4's
Second end is electrically connected with touching IC TP3 ends, the first end ground connection of the 5th electric capacity C5, the second end of the 5th electric capacity C5
It is connected with feeder ear, the vdd terminal of the touch IC is electrically connected with feeder ear, TPQ0 ends, TPQ1 ends, the TPQ2 ends of the touch IC
Electrically connected with TPQ3 ends with MCU one end, the OD ends of the touch IC and VSS ends ground connection, the first end of the MCU is with being used for
The resistor chain group electrical connection of current limliting, the first light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3
Electrically connected with the 4th light emitting diode D4 negative pole end with MCU the second end, the first light emitting diode D1, second light
Diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode D4 positive terminal are connected with feeder ear.
Preferably, the resistance number in the resistor chain group for current limliting is that even-multiple is set.
Preferably, the resistance number in the resistor chain group for current limliting is 4, respectively first resistor R1, second
Resistance R2,3rd resistor R3 and the 4th resistance R4,7 pin, the second electricity of the first end of the MCU respectively with the first resistor R1
The first end for hindering 1 pin of R2 5 pin, 3rd resistor R3 3 pin and the 4th resistance R4 is electrically connected, 8 pin of the first resistor R1,
Second end of 2 pin of second resistance R2 6 pin, 3rd resistor R3 4 pin and the 4th resistance R4 is respectively with described first luminous two
Pole pipe D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode D4 negative pole end electrical connection.
Preferably, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 are regulation electric capacity.
Preferably, the 5th electric capacity C5 is filter capacitor.
Preferably, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 value are 1 ~ 30pF.
The advantage of technical solution of the present invention is mainly reflected in：The new trend controller touch key-press circuit structure is simple, significantly
Ground reduces product cost, and stability is high in use, applied widely, can industrially promote the use of.The new air control
Touch key-press built in device processed, it drives IC to be condenser type super low-power consumption IC, and performance is stable, and matches somebody with somebody white superbright LED background lights, by
There is no contact in touch key-press, the problem of easily solving mechanical key physical damage, service life is also very permanent, it is general next
Say it is semipermanent, and maintain the overall integrity of fuselage.The new trend controller is in use due to being to lean on people's feel
Should, whole interface does not have the presence of button, is easy to cleaning, makes product more high-grade attractive in appearance in appearance, allow new trend controller to see
Get up one integrated mass.
Brief description of the drawings
Fig. 1 is the circuit diagram of the touch key-press circuit of new trend controller of the present invention.
The structural representation of the touch key-press of Fig. 2 new trend controllers of the present invention.
Embodiment
The purpose of the present invention, advantage and feature, will be carried out by the non-limitative illustration of preferred embodiment below diagram and
Explain.These embodiments are only the prominent examples using technical solution of the present invention, it is all take equivalent substitution or equivalent transformation and
The technical scheme of formation, all falls within the scope of protection of present invention.
Present invention is disclosed a kind of touch key-press circuit of new trend controller, as shown in figure 1, the touch key-press circuit includes
First electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, touch IC, MCU, for current limliting use
Resistor chain group, the first light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode
D4.Due to the capacitance touch IC that new trend controller is used, the first electric capacity C1 in circuit, the second electric capacity C2, the 3rd electric capacity C3, the
Four electric capacity C4 are regulation electric capacity, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 value for 1 ~
30pF, the bigger sensitivity of capacitance is smaller, in the case where not connecing, sensitivity highest.Because capacitance touch IC is to power ratio
Relatively strict, so placed a 5th electric capacity C5 in the place nearer apart from IC power supply pipes, the 5th electric capacity C5 is filtering
Electric capacity, plays a part of eliminating ripple in the circuit.
The first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 and the 5th electric capacity C5 are in parallel, described
First electric capacity C1 the second end is electrically connected with touching IC TP0 ends, the second end and touch IC TP1 ends of the second electric capacity C2
Electrical connection, the second end of the 3rd electric capacity C3 is electrically connected with touching IC TP2 ends, and the second end of the 4th electric capacity C4 is with touching
IC TP3 ends electrical connection is touched, the first end ground connection of the 5th electric capacity C5, the second end and the feeder ear of the 5th electric capacity C5 connect
Connect, the vdd terminal of the touch IC is electrically connected with feeder ear.
TPQ0 ends, TPQ1 ends, TPQ2 ends and the TPQ3 ends of the touch IC is electrically connected with MCU one end, described to touch
IC OD ends and VSS ends ground connection, the first end of the MCU are connected with the exclusion for current limliting, first light emitting diode
The second end of D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode D4 negative pole end with MCU
Electrical connection, the first light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode
D4 positive terminal is connected with feeder ear.
The first light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light-emitting diodes
Pipe D4 is used to project in the pattern on touch pad, in the technical program, for the selection of touch panel, new trend controller
It is preferred to use the acrylic of all-transparent as bottom plate, situation about not worked in backlight LED is reached by spraying non-conductive ink mode
Under, relational pattern is not shown, when LED is lighted, the effect that relational pattern shows.
Spring type touch button, the spring are provided between the second end of the first electric capacity C1 and the TP0 ends for touching IC
Formula touch key-press is reserved with pad, is welded to after PCB pad, and the first electric capacity C1 the second end is connected to by pad
TP0 ends with touching IC.Spring type touch button, institute are provided between the second end of the second electric capacity C2 and the TP1 ends for touching IC
State spring type touch button and be reserved with pad, be welded to after PCB pad, be connected to the second electric capacity C2's by pad
Second end and the TP1 ends for touching IC.Spring type touch is provided between the second end of the 3rd electric capacity C3 and the TP2 ends for touching IC
Button, the spring type touch button is reserved with pad, is welded to after PCB pad, the 3rd is connected to by pad
Electric capacity C3 the second end and the TP2 ends for touching IC.Bullet is provided between the second end of the 4th electric capacity C4 and the TP3 ends for touching IC
Spring formula touch key-press, the spring type touch button is reserved with pad, is welded to after PCB pad, is connected by pad
It is connected to TP3 end of the 4th electric capacity C4 the second end with touching IC.
In capacitance type touch key PCB Layout design processes, the limitation of capacitance touch mode is fully taken into account,
Following design is accordingly made that in PCB Layout：C5 is filter capacitor, against IC is touched, touch IC is obtained clean
Power supply.The trace width for touching IC and each spring button is 8mil, and length is the length most Short protocol in being wired scheme, to protect
Demonstrate,prove the stabilization of signal.Each spring button to touch key-press IC cabling avoid being close together, if unavoidably, in the middle of two lines
A ground wire is walked, push button signalling crosstalk is prevented；Cabling of each spring button to touch key-press IC, it is to avoid via is used, if can not
Avoid, then do not exceed two or more, it is to avoid increase interference source for no reason.
Each spring button to touch key-press IC cabling are as far as possible remote to each other, remote other elements and cabling, especially
It is away from signal wire（High-frequency communication）Cabling, when inevitable, cabling vertical wirings, it is impossible to parallel cabling, or in the middle of two lines
Plus ground wire.The sensitivity of spring button can be adjusted suitably by electric capacity, surrounding's floor file line of spring button, examine spring button
Metastable signal is obtained when surveying signal.After spring button is welded on PCB, when installing PCB, the design utilizes the bullet of spring
Property the flat part of spring is close to acrylic board, to keep stable sensitivity.Touch other IC electricity on IC power supplys 3V3D and PCB
Source is isolated by inductance L1, and adds filter capacitor C2, C3, it is to avoid go to drive other loads using IC power supplys 3V3D is touched,
Other loads are prevented because the fluctuation of external circuit voltage causes touch IC power supplys 3V3D fluctuation, cause to touch the hair of IC flase drops
It is raw；Each spring is 3mm by key spacing, avoids the cross jamming of adjacent key.In the technical program, capacitance type touch key
It is to use capacitance for criterion.When human hand is close to board interface and following electrode slice formation electric capacity, by detecting capacitance
Change sense.
The application of spring touch key-press, due to PCB apart from acrylic touch panel farther out, if selection use PCB membrane keyboards
Disk, need to increase its touch area can just sense, but the vicinity of PCB induction keyboards can not have high Frequency circuits, can not there is paving
Ground, or the wider circuit of copper face, neighbouring interelectrode distance will be in more than 1mm.Because the touch PCB of new trend controller is removed
The WIFI module of high-frequency functions, and other circuits are also devised with outside touch function, PCB membrane keyboards are thus greatly constrained
The selection of disk, so new trend controller have selected the stronger spring touch key-press of adaptability.As shown in Fig. 2 the spring is touched
The shape of button 100 is similar horn-like, under it is small big, start diffusion amplification in the place of touch panel, reached increase contact surface
Long-pending effect.Spring touch key-press is contacted with PCB by point, and this addresses the problem a series of shortcoming of PCB touch keyboards.
Line line width between PCB induction electrodes is 8mil, and induction electrode circuit is 1mm, adjacent induction electrode with All other routes distance
Between it is as far as possible remote, do not intersect, when by HF link, floor file circuit, copper face wider circuit, pass through in crossing manner.
Resistance number in the exclusion for current limliting is that even-multiple is set, and the exclusion is used to adjust institute in the circuit
The first light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode D4 brightness are stated,
The first light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode D4 are protected,
In the technical program, the resistance number in the exclusion for current limliting is preferably 4, respectively first resistor R1, second
Resistance R2,3rd resistor R3 and the 4th resistance R4.7 pin, the second electricity of the first end of the MCU respectively with the first resistor R1
The first end for hindering 1 pin of R2 5 pin, 3rd resistor R3 3 pin and the 4th resistance R4 is electrically connected, 8 pin of the first resistor R1,
Second end of 2 pin of second resistance R2 6 pin, 3rd resistor R3 4 pin and the 4th resistance R4 is respectively with described first luminous two
Pole pipe D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode D4 negative pole end electrical connection.
Touch key-press built in the new trend controller, it drives IC to be condenser type super low-power consumption IC, and performance is stable, and with white
Superbright LED background lights, because button does not have contact, the problem of easily solving mechanical key physical damage, service life is also
It is permanent in the extreme, in general it is semipermanent, and the overall integrity of fuselage is maintained, and due to being sensed by human hand,
Whole interface does not have the presence of button, is easy to cleaning, makes product more high-grade attractive in appearance in appearance, allow new trend controller to seem
One integrated mass, the new trend controller touch key-press circuit cost is low, simple in construction, and applied widely, can industrially promote makes
With.
The present invention still has numerous embodiments, all technical sides formed by all use equivalents or equivalent transformation
Case, is within the scope of the present invention.
Claims (6)
1. the touch key-press circuit of new trend controller, it is characterised in that：The touch key-press circuit includes the first electric capacity C1, the second electricity
Hold C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, touch IC, MCU, the resistor chain group for current limliting, the first hair
Optical diode D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode D4, first electric capacity
C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 and the 5th electric capacity C5 are in parallel, the second end of the first electric capacity C1 with
IC TP0 ends electrical connection is touched, the second end of the second electric capacity C2 is electrically connected with touching IC TP1 ends, the 3rd electric capacity
C3 the second end is electrically connected with touching IC TP2 ends, and the second end of the 4th electric capacity C4 is electrically connected with touching IC TP3 ends,
The first end ground connection of the 5th electric capacity C5, the second end of the 5th electric capacity C5 is connected with feeder ear, the VDD of the touch IC
End is electrically connected with feeder ear, and TPQ0 ends, TPQ1 ends, TPQ2 ends and the TPQ3 ends of the touch IC are electrically connected with MCU one end,
The OD ends of the touch IC and VSS ends ground connection, the first end of the MCU is electrically connected with the resistor chain group for current limliting, described
First light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3 and the 4th light emitting diode D4 negative pole end
Electrically connected with MCU the second end, the first light emitting diode D1, the second light emitting diode D2, the 3rd light emitting diode D3
It is connected with the 4th light emitting diode D4 positive terminal with feeder ear.
2. the touch key-press circuit of new trend controller according to claim 1, it is characterised in that：It is described for current limliting
Resistance number in resistor chain group is set for even-multiple.
3. the touch key-press circuit of new trend controller according to claim 1, it is characterised in that：It is described for current limliting
Resistance number in resistor chain group is 4, respectively first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4, institute
State 7 pin, second resistance R2 5 pin, 3rd resistor R3 3 pin and the 4th of MCU first end respectively with the first resistor R1
The first end electrical connection of resistance R4 1 pin, 8 pin of the first resistor R1, second resistance R2 6 pin, 3rd resistor R3 4 pin
Lighted respectively with the first light emitting diode D1, the second light emitting diode D2, the 3rd with the second end of the 4th resistance R4 2 pin
Diode D3 and the 4th light emitting diode D4 negative pole end electrical connection.
4. the touch key-press circuit of new trend controller according to claim 1, it is characterised in that：The first electric capacity C1,
Second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 are regulation electric capacity.
5. the touch key-press circuit of new trend controller according to claim 1, it is characterised in that：The 5th electric capacity C5 is
Filter capacitor.
6. the touch key-press circuit of new trend controller according to claim 1, it is characterised in that：The first electric capacity C1,
Second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 value are 1 ~ 30pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710437924.1A CN107196635A (en) | 2017-06-12 | 2017-06-12 | The touch key-press circuit of new trend controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710437924.1A CN107196635A (en) | 2017-06-12 | 2017-06-12 | The touch key-press circuit of new trend controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107196635A true CN107196635A (en) | 2017-09-22 |
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ID=59877535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710437924.1A Pending CN107196635A (en) | 2017-06-12 | 2017-06-12 | The touch key-press circuit of new trend controller |
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| CN (1) | CN107196635A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202907270U (en) * | 2012-09-25 | 2013-04-24 | 江阴旺达电子有限公司 | Touch type LED controller |
| US20140001885A1 (en) * | 2011-03-23 | 2014-01-02 | Shenzhen Ada Electronics Co., Ltd. | Energy-saving electronic touch switch |
| CN203942506U (en) * | 2014-06-25 | 2014-11-12 | 北京智慧精灵科技有限公司 | A kind of touch key-press induction installation and intelligent switch |
| CN207070039U (en) * | 2017-06-12 | 2018-03-02 | 苏州贝艾尔净化科技有限公司 | The touch key-press circuit of new trend controller |
-
2017
- 2017-06-12 CN CN201710437924.1A patent/CN107196635A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140001885A1 (en) * | 2011-03-23 | 2014-01-02 | Shenzhen Ada Electronics Co., Ltd. | Energy-saving electronic touch switch |
| CN202907270U (en) * | 2012-09-25 | 2013-04-24 | 江阴旺达电子有限公司 | Touch type LED controller |
| CN203942506U (en) * | 2014-06-25 | 2014-11-12 | 北京智慧精灵科技有限公司 | A kind of touch key-press induction installation and intelligent switch |
| CN207070039U (en) * | 2017-06-12 | 2018-03-02 | 苏州贝艾尔净化科技有限公司 | The touch key-press circuit of new trend controller |
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Application publication date: 20170922 |