CN105138199B - Capacitive touch key sensor and control panel using same - Google Patents
Capacitive touch key sensor and control panel using same Download PDFInfo
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- CN105138199B CN105138199B CN201510528473.3A CN201510528473A CN105138199B CN 105138199 B CN105138199 B CN 105138199B CN 201510528473 A CN201510528473 A CN 201510528473A CN 105138199 B CN105138199 B CN 105138199B
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- Prior art keywords
- key
- touch key
- substrate
- control panel
- legend
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- 239000000758 substrate Substances 0.000 claims abstract description 33
- 239000004020 conductor Substances 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 12
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 238000002834 transmittance Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract 1
- 239000007769 metal material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
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- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
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Abstract
The invention discloses a capacitive touch key sensor and a control panel using the same. According to the invention, the middle part of the key pattern is hollowed to expose the transparent or semitransparent substrate, so that the key pattern part can realize complete light transmission, and compared with the prior art, the light transmittance is greatly improved, therefore, the hidden key can be clearly displayed, and the display effect is improved. Meanwhile, the invention does not require transparent conductive materials to form key patterns, so that the touch key can be prepared by using metal conductive materials with lower cost and smaller impedance, the manufacturing cost is reduced, and the performance of the touch key is improved.
Description
Technical field
The present invention relates to circuit engineerings, and in particular to its control panel of capacitance type touch key Sensors & Application.
Background technology
Capacitance type touch key can be used as built-in key to be applied to all kinds of household electrical appliance.It is arranged at the touch key-press back side
Backlight can further promote the usage experience of button.In order to enable touch key-press light transmission, current capacitance type touch key is equal
Using tin indium oxide (ITO) material of light transmission as conductive material.But the light transmittance of indium tin oxide material is relatively low, this can cause
Button, which is shown, to be obscured, and the appearance of built-in key is influenced.
Invention content
In view of this, the present invention provides a kind of its control panel of capacitance type touch key Sensors & Application, to improve
The light transmittance of built-in key optimizes display effect.
In a first aspect, a kind of capacitance type touch key sensor is provided, including：
Transparent or semitransparent substrate；And
The conductive pattern being made of an electrically conducting material being formed on the substrate；
Wherein, the conductive pattern include at least one key legend for being formed in predetermined key position and with it is described by
The conductive lead wire of key pattern connection；
The middle section of the key legend is exposed the substrate by hollow out, and the conductive pattern further includes around each
The shielding pattern of the key legend setting；
All shielding patterns are mutually conductively connected, when the shielding pattern is grounded, can in key legend and
Capacitance is formed between ground, which is used as a part for RC circuits in the detection circuit of the capacitance type touch key.
Preferably, the shielding pattern ground connection.
Preferably, the substrate is flexible substrates.
Preferably, the conductive pattern is made of conductive metal material.
Second aspect provides a kind of control panel with touch key-press, including：
Display module, including at least one button indicate display module；
The touch key-press sensor being set on the button instruction display module, including：
Transparent or semitransparent substrate；And
The conductive pattern being formed on the substrate；
Wherein, the conductive pattern include at least one key legend for being formed in predetermined key position and with it is described by
The conductive lead wire of key pattern connection；
Exposed the substrate by hollow out in the key legend middle section；
The position by hollow-out part is corresponding with the button instruction position of display module.
Preferably, the conductive pattern further includes the shielding pattern around each key legend setting；
All shielding patterns are mutually conductively connected.
Preferably, the shielding pattern ground connection.
Preferably, the substrate is flexible substrates.
Preferably, the conductive pattern is made of conductive metal material.
So that key legend part can be with by the way that key legend middle section hollow out to be exposed to transparent or semitransparent substrate
It realizes complete light transmission, substantially increases light transmittance compared with the existing technology, thus, it is possible to so that built-in key is clearly shown,
Promote display effect.Meanwhile present invention does not require use transparent conductive material to form key legend so that can use into
This conductive metal material relatively low, that impedance is smaller prepares touch-key, reduces manufacturing cost, improves touch key-press
Energy.
Description of the drawings
By referring to the drawings to the description of the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Figure 1A is the principle schematic of capacitance type touch key；
Figure 1B is an illustrative diagram of capacitance type touch key detection circuit；
Fig. 2 is the schematic diagram of the touch key-press sensor of the embodiment of the present invention；
Fig. 3 is the schematic diagram of the control panel including touch key-press of the embodiment of the present invention；
Fig. 4 is the sectional view of the control panel including touch key-press of the embodiment of the present invention.
Specific implementation mode
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.Under
Text to the present invention datail description in, it is detailed to describe some specific detail sections.Do not have for a person skilled in the art
The description of these detail sections can also understand the present invention completely.In order to avoid obscuring the essence of the present invention, well known method, mistake
There is no narrations in detail for journey, flow, element and circuit.
In addition, it should be understood by one skilled in the art that provided herein attached drawing be provided to explanation purpose, and
What attached drawing was not necessarily drawn to scale.
It will also be appreciated that in the following description, " circuit " refer to passed through by least one element or sub-circuit it is electrical
The galvanic circle that connection or electromagnetism connect and compose.It " is connected when claiming element or another element of circuit " being connected to " or element/circuit
" between two nodes when, it can be directly coupled or connected another element or may exist intermediary element, element it
Between connection can be physically, in logic or its combination.On the contrary, when claiming element " being directly coupled to " or " directly connecting
Be connected to " another element when, it is meant that the two be not present intermediary element.
Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar
Word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, being containing for " including but not limited to "
Justice.
In the description of the present invention, it is to be understood that, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indicating or implying relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
It is two or more.
Figure 1A is the principle schematic of capacitance type touch key.
As shown in Figure 1A, capacitance type touch key includes key legend a made of conductive material and covering thereon exhausted
Edge layer b connects leading for the earth when the key legend position that human body c (finger) is contacted since human body is equivalent to one
Body, a therefore inductance capacitance can be formed between key legend a and the earth, induced electricity capacity usually several pF to tens pF it
Between.Utilize this characteristic, you can by detecting the variation of the capacitance between key legend and the earth, detected whether that human body connects
Touch of key-press pattern.
Figure 1B is an illustrative diagram of capacitance type touch key detection circuit.
As shown in Figure 1B, a typical capacitance type touch key detection circuit can be constantly to charge to a RC circuit
With the relaxor of electric discharge.RC circuits include resistance R1 and capacitance C1 when human body does not contact key legend, the electricity of RC circuits
Hold the capacitance for being capacitance C1, therefore, the period of charge and discharge is shorter.And in human contact's key legend, RC circuits are in parallel
Above-mentioned inductance capacitance C2 (dotted line expression), therefore, the period of charge and discharge is elongated.Charge and discharge week is detected by a controller
The variation of phase can differentiate whether touch key-press is touched.It should be understood that circuit shown in Figure 1B is exemplary only, the present invention is real
Applying touch key-press sensor that example is related to can also be based on other kinds of detection circuit come to since human body touch is formed by
Capacitance variations are detected.
Fig. 2 is the schematic diagram of the touch key-press sensor of the embodiment of the present invention.
As shown in Fig. 2, touch key-press sensor includes the conduction of transparent or semitransparent substrate 1 and formation on the base 1
Pattern 2.
Substrate 1 is arranged to transparent or translucent, this light that light-emitting device of lower section is sent out penetrates substrate
1。
Preferably, the substrate 1 of the present embodiment is arranged to transparent flexible substrates, that is, transparent Kapton
Or polyester film.Since substrate is flexibility, touch key-press sensor can be made to be easily assembled, be hardly damaged.
Conductive pattern 2 lay with substrate 1 on comprising at least one key legend 21 for being formed in predetermined key position with
And the conductive lead wire 22 being connect with key legend.
In fig. 2,6 key legends 21 are provided with juxtaposition1~216, key legend 211~216Between each other not
Connection, passes through corresponding conductive lead wire 22 respectively1~226It draws.
As shown in Fig. 2, the middle section of each key legend 21 is exposed transparent or semitransparent substrate 1 by hollow out.By
This, each key legend 21 is actually formed to be similar to annular.In fig. 2, key legend 21 has approximate rectangular outer
All and circular hollow-out part, it should be appreciated that the peripheral shape of key legend 11 and the shape of hollow-out part can be as needed
Be formed as variously-shaped and size.Wherein, the positions and dimensions of hollow-out part can be set according to subsequently when assembling control panel
It is placed in the positions and dimensions adjustment of the button instruction display module below touch key-press sensor.
So that key legend part can be with by the way that key legend middle section hollow out to be exposed to transparent or semitransparent substrate
It realizes complete light transmission, substantially increases light transmittance compared with the existing technology, thus, it is possible to so that built-in key is clearly shown,
Promote display effect.
Further, in fig. 2, conductive pattern 2 further includes shielding pattern 23, is arranged around each key legend 21,
And it is mutually conductively connected.In fig. 2, position of the shielding pattern 23 between adjacent key legend 21 extends, while by setting
The line for being placed in 21 side of key legend is connected with each other, and is arranged to surround key legend 21 in three directions.Shielding pattern 23
It is drawn out to the edge of substrate via corresponding conductive lead wire 23a, is connected with corresponding circuit block with facilitating.Preferably, it shields
Pattern 23 is grounded.Shielding pattern 23 can have the electromagnetic interference that outside on the one hand can be shielded there are two types of effect.On the other hand,
When shielding pattern 23 is grounded, capacitance can be formed between key legend 21 and ground, which may be used as detection circuit
A part for middle RC circuits, thus, it is possible to reduce the number of elements of detection circuit.
It further, can be through due to being set to the light that sends out of button instruction display module below touch key-press sensor
It is appeared by the hollow-out part of key legend 21, therefore, key legend 21 itself need not be formed using transparent conductive material, because
This, can be laid in flexible substrates 1 using conductive metal material (such as copper) and form conductive pattern.It is existing to be based on indium oxide
Conductive pattern impedance prepared by tin material is larger, this can cause button detection difficulty larger, and poor reliability, and be easy
It is damaged in assembly.And conductive metal material has smaller impedance relative to indium tin oxide material, it can be with as key legend
Reduce the requirement to detection circuit so that detection is more prone to, and application range is wider.Simultaneously as the material of conductive metal material
Expect it is at low cost, laying technique it is simpler, quality more stablize, therefore, can while increasing light transmittance, be greatly reduced by
The fraction defective and manufacturing cost of key touch sensor.Specifically, it can be manufactured by manufacturing the technique of flexible PCB (FPC)
The touch key-press sensor of the present embodiment.
Fig. 3 is the schematic diagram of the control panel including touch key-press of the embodiment of the present invention.Fig. 4 is the embodiment of the present invention
The sectional view of control panel including touch key-press.
As Figure 3-Figure 4, control panel includes display module 3 and the touch key-press being set on display module 3 sensing
Device 4.
Display module 3 includes that at least one button indicates display module 31.In figure 3, it is pressed with touch key-press sensor
Bond number amount corresponds to, and display module 3 includes 6 button being set up in parallel instruction display modules 311~316.Each button instruction display
Component can shine.Preferably, each button display module 311~316It can show scheduled pattern or emit different colours
Light, to be distinguished to button.Meanwhile display module 3 can also include digital display module 32 and status display component
33 etc..
Touch key-press sensor 4 is set on button instruction display module 3, and the two can contact installation can also be non-contact
Installation, as long as ensureing that middle section can be with light transmission.
Meanwhile the position of the hollow-out part of 6 key legends of touch key-press sensor 4 and 6 buttons being set up in parallel
Indicate display module 311~316Position correspond to respectively, it is possible thereby to which so that the light that sends out of button instruction display module 31 passes through
Hollow-out part appears.
When control panel to be set in a shell, shell, which can serve as, is set to 4 top of touch key-press sensor
Insulating layer.Button indicates that display module prompts the position of touch key-press by light, when key legend corresponds on human contact's shell
Position when, inductance capacitance is formed between key legend and the earth, to pass through the detection that is connect with touch key-press sensor
Circuit can detect the touch.
Since corresponding position is by hollow out, the light transmittance of the control panel of the present embodiment can be close to 100%.Thus, it is possible to
So that built-in key is clearly shown, display effect is promoted.
Simultaneously as key legend can be prepared using conductive metal material, the embodiment of the present invention can be aobvious in enhancing
While showing effect, substantially lower the fraction defective and manufacturing cost of button touch sensor.
It should be understood that button instruction display module and key legend can be arranged as required to for other quantity and with difference
Formal distribution setting, as long as ensure both position correspond to.
It should be understood that the control panel of the present embodiment can be applied to the keyboard of such as control terminal or the sheet of household electrical appliance
Body.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for those skilled in the art
For, the present invention can have various modifications and changes.It is all within spirit and principles of the present invention made by any modification, equivalent
Replace, improve etc., it should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of capacitance type touch key sensor, including：
Transparent or semitransparent substrate；And
The conductive pattern being made of an electrically conducting material being formed on the substrate；
Wherein, the conductive pattern include at least one key legend for being formed in predetermined key position and with the button figure
The conductive lead wire of case connection；
Exposed the substrate by hollow out in the middle section of the key legend；
The conductive pattern further includes the shielding pattern around each key legend setting；
All shielding patterns are mutually conductively connected, can be in key legend and ground when the shielding pattern is grounded
Between form capacitance, the capacitance be used as the capacitance type touch key detection circuit in RC circuits a part.
2. touch key-press sensor according to claim 1, which is characterized in that the shielding pattern ground connection.
3. touch key-press sensor according to claim 1 or 2, which is characterized in that the substrate is flexible substrates.
4. touch key-press sensor according to claim 1 or 2, which is characterized in that the conductive pattern is by metallic conduction
Material is made.
5. a kind of control panel with touch key-press, including：
Display module, including at least one button indicate display module；
The touch key-press sensor as described in one of Claims 1-4 being set on the button instruction display module, packet
It includes：
Transparent or semitransparent substrate；And
The conductive pattern being formed on the substrate；
Wherein, the conductive pattern include at least one key legend for being formed in predetermined key position and with the button figure
The conductive lead wire of case connection；
Exposed the substrate by hollow out in the key legend middle section；
The position by hollow-out part is corresponding with the button instruction position of display module.
6. control panel according to claim 5, which is characterized in that the conductive pattern further include around it is each described by
The shielding pattern of key pattern setting；
All shielding patterns are mutually conductively connected.
7. control panel according to claim 6, which is characterized in that the shielding pattern ground connection.
8. according to the control panel described in any one of claim 5-7, which is characterized in that the substrate is flexible substrates.
9. according to the control panel described in any one of claim 5-7, which is characterized in that the conductive pattern is by metallic conduction
Material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510528473.3A CN105138199B (en) | 2015-08-25 | 2015-08-25 | Capacitive touch key sensor and control panel using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510528473.3A CN105138199B (en) | 2015-08-25 | 2015-08-25 | Capacitive touch key sensor and control panel using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105138199A CN105138199A (en) | 2015-12-09 |
| CN105138199B true CN105138199B (en) | 2018-11-02 |
Family
ID=54723565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510528473.3A Active CN105138199B (en) | 2015-08-25 | 2015-08-25 | Capacitive touch key sensor and control panel using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105138199B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106209055A (en) * | 2016-06-27 | 2016-12-07 | 珠海格力电器股份有限公司 | Circuit board and touch panel |
| CN110958012A (en) * | 2019-12-30 | 2020-04-03 | 贵州近邻宝科技有限公司 | Touch keyboard and express delivery cabinet |
| CN111182680B (en) * | 2020-01-20 | 2021-11-02 | 深圳创维数字技术有限公司 | Button device and conference are dull and stereotyped |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949425A (en) * | 2005-10-12 | 2007-04-18 | 中兴通讯股份有限公司 | Touch keyboard and mobile terminal with same |
| CN201655596U (en) * | 2010-04-13 | 2010-11-24 | 英华达（上海）科技有限公司 | Light guiding structure of light-transmitting button |
-
2015
- 2015-08-25 CN CN201510528473.3A patent/CN105138199B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949425A (en) * | 2005-10-12 | 2007-04-18 | 中兴通讯股份有限公司 | Touch keyboard and mobile terminal with same |
| CN201655596U (en) * | 2010-04-13 | 2010-11-24 | 英华达（上海）科技有限公司 | Light guiding structure of light-transmitting button |
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| Publication number | Publication date |
|---|---|
| CN105138199A (en) | 2015-12-09 |
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