CN104218935B - Integral type capacitor induction type key panel and its recognition by pressing keys method - Google Patents
Integral type capacitor induction type key panel and its recognition by pressing keys method Download PDFInfo
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- CN104218935B CN104218935B CN201410401356.6A CN201410401356A CN104218935B CN 104218935 B CN104218935 B CN 104218935B CN 201410401356 A CN201410401356 A CN 201410401356A CN 104218935 B CN104218935 B CN 104218935B
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Abstract
The present invention relates to button and button detection field, a kind of integral type capacitor induction type metal key-press panel and its recognition by pressing keys method are disclosed.In the present invention, by the way that a plurality of button character areas are arranged on the first metal substrate, it is correspondingly arranged on a plurality of button detecting parts on the second conductor substrate, forms two electrodes of a plurality of capacitances；Area not equal pierced pattern is respectively arranged in a plurality of button character areas；A plurality of capacitance sensing circuits are electrically connected with a plurality of button character areas and a plurality of button detecting parts and sense a plurality of capacitances that a plurality of button character areas are formed with a plurality of button detecting parts respectively；A plurality of capacitance sensing circuits are electrically connected with recognition by pressing keys control circuit.The present invention utilizes integrated metal panel, tool to have good wearability and service life, and can reliably on induced key push action, can prevent dust from entering, convenient for maintenance.
Description
Technical field
The present invention relates to button and button detection field, more particularly, to integral type capacitor induction type metal key-press panel and
Its recognition by pressing keys method.
Background technology
Key panel is usually made of multiple buttons, has very extensive application.For example, consumer electronics field such as
Many buttons are provided on household electrical appliance.Such as television set, washing machine, computer is first-class many key panels.
In addition, on elevator or on other machines for controlling of needs, it is all provided with key panel mostly.Utilize button
Panel controls the operation of machine.Common mechanical switch button easily enters ash because it is prone to wear out in use
The reasons such as dirt are replaced by the button of intelligent-induction formula gradually.
There are many key panels.Such as resistance induction type button, pressure inductive button, capacitor induction type button.Its
In, capacitor induction type button is because requiring touched button with other conducting elements to there is reliable insulating properties to be touched to avoid mistake
Hair, therefore can avoid using metal material as possible in the press-key structure of general capacitor induction type button.It causes so mostly
Several capacitor induction type press-key structure mechanical strengths is low, shaky, easily damaged intolerant to abrasion, and it is a series of to be not easy to maintenance etc.
Problem.What these appliance fields used in some durabilities showed is especially apparent.Such as the other parts function of large electric appliances
Still intact, and key part has damaged.
It is urgent to provide a kind of capacitor induction type key panel that can be solved the above problems and recognition by pressing keys methods.
Invention content
The purpose of the present invention is to provide a kind of integral type capacitor induction type metal key-press panel and its recognition by pressing keys method,
So that the mechanical strength of button is improved, the wearability and service life of button are improved.
In order to solve the above technical problems, embodiments of the present invention provide a kind of integral type capacitor induction type button, packet
Include the first metal substrate (101), the second conductor substrate (102), a plurality of capacitance sensing circuits (105), recognition by pressing keys control electricity
Road (106)；A plurality of button character areas (107), a plurality of button characters are provided on first metal substrate (101)
The pierced pattern (104) that area does not wait is respectively arranged in area (107)；It is correspondingly arranged on the second conductor substrate (102)
A plurality of button detecting parts (120)；A plurality of button character areas (107) and a plurality of button detecting parts (120) are right
It should be arranged and be formed two electrodes of a plurality of capacitances；A plurality of capacitance sensing circuits (105) respectively with it is described a plurality of
Button character area (107) and a plurality of button detecting parts (120) are electrically connected and sense a plurality of button character areas
(107) a plurality of capacitances formed with a plurality of button detecting parts (120)；A plurality of capacitance sensing circuits (105)
It is electrically connected with recognition by pressing keys control circuit (106).
Embodiments of the present invention additionally provide it is a kind of applied to above-mentioned integral type capacitor induction type key panel by
Key recognition methods presses each button on the capacitor induction type key panel, utilizes a plurality of capacitance sensing electricity
Road is formed by capacitance sampling to a plurality of button character areas and a plurality of button detecting parts respectively, is formed multiple
Several capacitance matrix arrays；And capacitance threshold value is established according to the maximum capacitor value value and position of minimum capacitance corresponding to each button
Range library；The a plurality of button character areas for sensing the first metal substrate and a plurality of button senses on the second conductor substrate (102)
The a plurality of capacitances formed between survey portion (120)；By a plurality of capacitances sensed and the capacitance matrix array and
Capacitance threshold value range library is compared to identify the button being pressed.
Embodiment of the present invention in terms of existing technologies, using integral type capacitor induction type metal decking, improves
The mechanical strength of button improves the wearability and service life of button.In addition, the capacitor induction type key panel of the present invention,
Using integrated metal decking, can enter to avoid dust；In addition, the integral type capacitor induction type key panel of the present invention, it can
To substantially reduce production and assembly cost.Using capacitance sensing, the reliability of button is improved.And the capacitor induction type of the present invention
It is slab construction that button, which is presented with external form, and assembly is easy.In addition, recognition by pressing keys method provided by the invention, circuit letter
It is single, it is quick on the draw, reliability is high.
In addition, first metal substrate is integral type metal decking.
In addition, the second conductor substrate is metal substrate.In addition, the second conductor substrate can be circuit board, such as print
Printed circuit board；Include a plurality of metal pads on the circuit board, corresponds to the button character area on first metal substrate.
In addition, the ribs of a plurality of protrusions is arranged in the button character area periphery on first metal substrate.
In addition, the ribs is 0.2 millimeter~0.5 millimeter relative to the thickness in button character area.
In addition, the integral type capacitor induction type key panel includes isolation part, the isolation part is to be set to described the
Continuous or discontinuous separation layer between one metal substrate and the second conductor substrate.
In addition, the continuous separation layer is made of transparent or semitransparent material.
In addition, further comprising key indicator lamp, the key indicator lamp is set to the back side of the second conductor substrate；It is described
Second conductor substrate position corresponding with key indicator lamp is equipped with loophole；First metal substrate and second conductor
Continuous transparent or semitransparent separation layer or discontinuous separation layer are provided between substrate.
In addition, the invention also includes a kind of recognition by pressing keys method, including step：Press the capacitor induction type key panel
On each button, using a plurality of capacitance sensing circuits respectively to a plurality of button character areas with it is described multiple
Several button detecting parts are formed by capacitance sampling, form a plurality of capacitance matrix arrays；And it is pressed according to corresponding to each
The maximum capacitor value and position of minimum capacitance of key establish capacitance threshold value range library；Sense a plurality of button characters of the first metal substrate
The a plurality of capacitances formed between a plurality of button detecting parts in area and the second conductor substrate；The a plurality of electricity that will be sensed
Capacitance is compared with the capacitance matrix array and capacitance threshold value range library with to determine whether button is triggered.
Furthermore it is also possible to include step：When judging to identify that n-th button is triggered, it is corresponding to start n-th button
The trigger signal of N keys is simultaneously transferred to signal input interface by key indicator lamp, wherein N is natural number.
The recognition by pressing keys method of the present invention uses integral type capacitance sensing structure, and Programming Methodology is simple, primary only to need
Sense a capacitance signal, you can judge which button is triggered；With very high reliability.Hardware circuit and sensing
Judgment method is very simple, therefore has very high reliability.And signal sensitivity and discrimination it is all very high.
Description of the drawings
Fig. 1 is the structural schematic diagram according to the capacitor induction type key panel of first embodiment of the invention；
Fig. 2 is the floor map of the first metal substrate and the second conductor substrate in first embodiment of the invention；
Fig. 3 is button character area and the hollow out of the integral type capacitor induction type key panel of first embodiment of the invention
The floor map of pattern；
Fig. 4 A are the first metal substrates of the integral type capacitor induction type key panel of first embodiment of the invention
Planar structure schematic diagram；
Fig. 4 B are the first metal substrates of the integral type capacitor induction type key panel of first embodiment of the invention
Side sectional view；
Fig. 5 is the structural schematic diagram of the integral type capacitor induction type key panel of second embodiment of the invention；
Fig. 6 is the stream of the recognition by pressing keys method of the integral type capacitor induction type key panel of third embodiment of the present invention
Cheng Tu；
Fig. 7 is the stream of the recognition by pressing keys method of the integral type capacitor induction type key panel of the 4th embodiment of the invention
Cheng Tu.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to each reality of the present invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the present invention,
In order to make the reader understand this application better, many technical details are proposed.But even if without these technical details and base
In the various changes and modifications of following embodiment, each claim of the application technical side claimed can also be realized
Case.
The first embodiment of the present invention is related to a kind of integral type capacitor induction type key panel, structure is as shown in Figure 1.
The integral type capacitor induction type key panel of present embodiment includes the first metal substrate 101, the second conductor substrate 102, plural number
A capacitance sensing circuit 105, recognition by pressing keys control circuit 106；A plurality of button words are provided on first metal substrate 101
Area 107 is accorded with, the pierced pattern 104 that area does not wait is respectively arranged in a plurality of button character areas 107；Second conductor
A plurality of button detecting parts 120 are correspondingly arranged on substrate 102；It a plurality of is pressed with described in a plurality of button character areas 107
Key detecting part 120 forms two electrodes of a plurality of capacitances；A plurality of capacitance sensing circuits 105 respectively with it is described a plurality of
Button character area 107 and a plurality of button detecting parts 120 are electrically connected and sense a plurality of button character areas 107 and answer
A plurality of capacitances that several a button detecting parts 120 are formed；A plurality of capacitance sensing circuits 105 and recognition by pressing keys control electricity
Road 106 is electrically connected.
Fig. 2 shows the plane signals of the first metal substrate and the second conductor substrate in the present embodiment of the present invention
Figure.It should be noted that being provided with a plurality of button character areas 107 on first metal substrate 101, count as illustrated in the drawing
Pierced pattern 104 is respectively set in a plurality of button character areas 107 in region where word 123456789.To specific building
The shape of figure pattern is then without any requirement.Black numbers region in block diagram as shown in Figure 2.It can be seen that the first Metal Substrate
By hollow out at the pattern of number in button character area 107 corresponding to plate 101, when these different button characters 107 are pressed
When, the first metal substrate 101 can be made to generate deformation.Include a plurality of button detecting parts 120 on second conductor substrate 102.First
120 institute of a plurality of button sensing areas on 107 and second conductor substrate 102 of a plurality of button character areas on metal substrate 101
Form a plurality of capacitances.When one of button is pressed, a plurality of capacitance sensing circuits 105 are to each button
The button detecting part 120 of character area 107 corresponding thereto is formed by capacitance and is sensed, and records.Such as Fig. 1 or Fig. 2
It is shown, 12 buttons are shared in the present embodiment, when button " 1 " is pressed, 105 meeting of a plurality of capacitance sensing circuits
Sense the corresponding capacitance matrix array of 12 buttons 1.When button " 2 " is pressed, a plurality of capacitance sensings
Circuit 105 can sense the corresponding capacitance matrix array of 12 buttons 2.Compare capacitance matrix array 1 and capacitance square
A burst of row 2 can identify the button character being pressed.
It is further to note that the first metal substrate 101 that present embodiment uses is an entirety, this and preceding case skill
It is fundamental difference in structure that the button of dispersion is used in art or other designs.The first metal substrate 101 that the present invention uses
As a whole, it in manufacture and assembly, is all easier, and the entrance of dust greasy dirt can be prevented, be convenient for key face
The maintenance of plate improves the service life of key panel；In addition, metal substrate is as a whole, mechanical performance will be due to
The box-like structure of multiple key groups to spread out.This improves the service life of key panel.
Furthermore it is preferred that first metal substrate in the integral type capacitor induction type key panel of present embodiment
101 be integral type metal decking.
In addition, the second conductor substrate 102 or electricity in the integral type capacitor induction type key panel of present embodiment
Road plate, such as printed circuit board；Include a plurality of metal pads on the circuit board, corresponds to first metal substrate 101
On button character area 107.Need to illustrate when, the conductor of other materials may be used in the second conductor substrate 102, as long as meeting
Two electrodes are opposite to form the structure of capacitance with the first metal substrate 101.
Furthermore it is preferred that as shown in Figure 4 A, the integral type capacitor induction type key panel of present embodiment, described first
The ribs 108 of a plurality of protrusions is arranged in 107 periphery of button character area on metal substrate 101.It is arranged in button character area 107
The ribs 108 of peripheral projection strengthen the mechanical performance of integral type capacitor induction type key panel, and wherein one press
The influence that other buttons are unaffected when key is pressed or reduction is to another button.Preferably, the ribs 108 relative to
The thickness in button character area 107 is 0.2 millimeter~0.5 millimeter.Here so-called to go 107 thickness to mean relative to button character
The thickness in ribs region is higher by 0.2 millimeter to 0.5 millimeter than the thickness in button character area.As shown in Figure 4 B, from sectional view
As can be seen that relative to button character area 107, ribs 108 has protruded a distance.This distance is preferably 0.2 millimeter and arrives
0.5 millimeter.This reinforces the mechanical strength on 107 periphery of button character area, when button character area 107 is pressed, neighboring area
Deformation quantity be reduced to minimum.
In addition, a plurality of pierced patterns 104 of the integral type capacitor induction type key panel of present embodiment can be with
The pattern of arbitrary shape, as shown in figure 3, on the periphery of button character " 6 " circular ring shape pierced pattern, or " ^ " week
Side adds pierced pattern "=", and the pattern in button character area is adjusted with this.In this way, being conducive to improve the identification of each button
Degree.
In addition, a plurality of pierced patterns of the integral type capacitor induction type key panel of present embodiment include pressing
Key characters and area compensating pattern.It should be understood that design space is limited under normal conditions for the area of button character, general feelings
It change its structure in order not to meeting for the purpose of recognition by pressing keys under condition.And capacitance sensing of the present invention be key panel use capacitance
Induction, and capacitive sensing is inseparable with the relative area of electrode.Therefore for better sense capacitance, can comprising by
In the case of key characters, increase Area Compensation pattern, such as shown in figure 3, the Area Compensation figure in button character area
Case can add circular ring shape on the periphery of button character " 6 ", or add "=" word on the side of upward symbol " ^ "
Symbol.Those skilled in the art should be understood that the Area Compensation pattern can be the pattern of any shape.
In addition, the integral type capacitor induction type key panel of present embodiment, as shown in Fig. 1 or Fig. 5, can also include every
From portion 103, the isolation part 103 is the company being set between first metal substrate 101 and the second conductor substrate 102
Continuous or discontinuous separation layer.Isolation part 103 shown in Fig. 1 is continuous separation layer, it should be pointed out that may be set to be
Discontinuous separation layer, such as supporting block.
Compared with prior art, the capacitor induction type button of present embodiment uses integrated metal substrate as key face
Plate improves the mechanical strength of key face, improves wearability and key panel service life.In addition, the capacitance of the present invention
Induction type button uses capacitance induction principle, simple in structure, and sensing mode is reliable and stable.And use smooth integrated metal
Substrate uses smooth structure, to gapless between button and button, to avoid falling into dust or greasy dirt, convenient for supporting
Shield.
Second embodiment of the present invention is related to a kind of integral type capacitor induction type key panel.Second embodiment is
It is further improved on the basis of one embodiment, mainly thes improvement is that：In second embodiment of the invention, using by
Key indicator light can more clearly indicate press key contents, convenient for users to button is identified.
Specifically, as shown in figure 5, the integral type capacitive sensing of the present invention be key panel includes key indicator lamp 109,
The key indicator lamp 109 is set to the back side of the second conductor substrate 102；The second conductor substrate 102 and key indicator lamp
Corresponding position is equipped with loophole 110；It is provided between first metal substrate 101 and the second conductor substrate 102
Discontinuous dielectric isolation layer or continuous transparent or semitransparent dielectric isolation layer.Key indicator lamp through the invention, can
More clearly to indicate press key contents, convenient for users to button is identified.
It states continuous separation layer in addition, described and is made of transparent or semitransparent material.Here require it is so-called transparent or
Isolation part 103 made of person's trnaslucent materials, which is meant that, requires certain translucency.It is lighted in this way in key indicator lamp 109
When, light can penetrate transparent area and reach pierced pattern area, illuminate button.
Third embodiment of the invention is related to a kind of applied to the integral type of first embodiment or second embodiment electricity
Hold the recognition by pressing keys method of induction type key panel.The recognition by pressing keys method of present embodiment includes step 601：Press the electricity
Hold each button on induction type key panel, using a plurality of capacitance sensing circuits 105 respectively to the plural number
A button character area 107 is formed by capacitance sampling with a plurality of button detecting parts 120, forms a plurality of capacitance squares
A burst of row；Step 602：Capacitance threshold value range is established according to the maximum capacitor value value and position of minimum capacitance corresponding to each button
Library.
As shown in fig. 6, the recognition by pressing keys method of present embodiment further comprises step 603：Sense the first metal substrate
What is formed between a plurality of button detecting parts 120 on 101 107 and second conductor substrate 102 of a plurality of button character areas answers
Several capacitances；Step 604：By a plurality of capacitances sensed and the capacitance matrix array and the capacitance threshold value model
Library is enclosed to be compared to confirm whether button is triggered.
Four embodiment of the invention is related to a kind of integral type capacitor induction type key face applied to second embodiment
The recognition by pressing keys method of plate.4th embodiment is further improved on the basis of third embodiment, main improvements
It is：In the fourth embodiment, after by key pressing, the corresponding key indicator lamp of start button can more clearly indicate to press
Key content, convenient for users to button is identified.
The recognition by pressing keys method of present embodiment can also include step 605：Identify that n-th button is triggered；Step
606：Start the corresponding key indicator lamp of n-th button and the trigger signal of N keys is transferred to signal input interface, wherein N
For natural number.
The recognition by pressing keys method of the present invention uses integral type capacitance sensing structure, and Programming Methodology is simple, primary only to need
Sense a capacitance signal, you can judge which button is pressed；With very high reliability.Hardware circuit and sensing
Judgment method is very simple, therefore has very high reliability.And signal sensitivity and discrimination it is all very high.
The step of various methods divide above, be intended merely to describe it is clear, when realization can be merged into a step or
Certain steps are split, multiple steps are decomposed into, as long as including identical logical relation, all in the protection domain of this patent
It is interior；To either adding inessential modification in algorithm in flow or introducing inessential design, but its algorithm is not changed
Core design with flow is all in the protection domain of the patent.
It should be noted that being a basal keystroke provided by the invention in conjunction with the structure that foregoing description and attached drawing are presented
The structure of panel, it should be understood by those skilled in the art that can be within the spirit and scope of the present invention to some parts
Feature makes various modifications, without departing from the scope of the present invention.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. integral type capacitor induction type key panel, which is characterized in that including the first metal substrate (101), the second conductor substrate
(102), a plurality of capacitance sensing circuits (105), recognition by pressing keys control circuit (106)；First metal substrate is one whole
Body；A plurality of button character areas (107), a plurality of button character areas are provided on first metal substrate (101)
(107) pierced pattern (104) that area does not wait is respectively arranged in；It is correspondingly arranged on the second conductor substrate (102) multiple
Several button detecting parts (120)；A plurality of button character areas (107) are corresponding with a plurality of button detecting part (120)
It is arranged and is formed two electrodes of a plurality of capacitances；A plurality of capacitance sensing circuits (105) a plurality of are pressed with described respectively
Key characters area (107) and a plurality of button detecting parts (120) are electrically connected and sense a plurality of button character areas (107)
The a plurality of capacitances formed with a plurality of button detecting parts (120)；A plurality of capacitance sensing circuits (105) and button
Recognition control circuit (106) is electrically connected；A plurality of capacitance sensing circuits (105) are respectively to a plurality of button characters
Area (107) is formed by capacitance sampling with a plurality of button detecting parts (120), forms a plurality of capacitance value matrix battle arrays
Row；
Wherein, the ribs of a plurality of protrusions is arranged in button character area (107) periphery on first metal substrate (101)
(108)。
2. integral type capacitor induction type key panel according to claim 1, which is characterized in that first metal substrate
(101) it is integral type metal decking.
3. integral type capacitor induction type key panel according to claim 1, which is characterized in that the second conductor substrate
(102) it is circuit board, the circuit board includes a plurality of metal weldings being correspondingly arranged with a plurality of button character areas (107)
Disk.
4. integral type capacitor induction type key panel according to claim 1, which is characterized in that the ribs (108)
Thickness relative to button character area (107) is 0.2 millimeter~0.5 millimeter.
5. integral type capacitor induction type key panel according to claim 1, which is characterized in that a plurality of hollow out figures
Case (104) includes button character and area compensating pattern.
6. the integral type capacitor induction type key panel according to any one of Claims 1 to 5 claim, feature exist
In, including isolation part (103), the isolation part (103) they are to be set to first metal substrate (101) and second conductor
Continuous or discontinuous separation layer between substrate (102).
7. integral type capacitor induction type key panel according to claim 6, which is characterized in that the continuous separation layer
It is made of transparent or semitransparent material.
8. the integral type capacitor induction type key panel according to any one of Claims 1 to 5 claim, feature exist
In further comprising that key indicator lamp (109), the key indicator lamp (109) are set to the back of the body of the second conductor substrate (102)
Face；Second conductor substrate (102) position corresponding with key indicator lamp is equipped with loophole (110)；First metal
Discontinuous separation layer or continuous transparent or semitransparent is provided between substrate (101) and the second conductor substrate (102)
Dielectric isolation layer.
9. a kind of recognition by pressing keys applied to the integral type capacitor induction type key panel described in Claims 1 to 5 any one
Method, which is characterized in that including step：Each button on the capacitor induction type key panel is pressed, using described multiple
Several capacitance sensing circuits (105) are respectively to a plurality of button character areas (107) and a plurality of button detecting parts
(120) it is formed by capacitance sampling, forms a plurality of capacitance matrix arrays；And according to the maximum electricity corresponding to each button
Capacitance and position of minimum capacitance establish capacitance threshold value range library；Sense a plurality of button character areas of the first metal substrate (101)
(107) a plurality of capacitances formed between a plurality of button detecting parts (120) and on the second conductor substrate (102)；It will sense
The a plurality of capacitances measured are compared to determine button with the capacitance matrix array and capacitance threshold value range library
Whether it is triggered.
10. recognition by pressing keys method according to claim 9, which is characterized in that including step：Identify that n-th is triggered
Button；Start the corresponding key indicator lamp of n-th button and the trigger signal of N keys be transferred to signal input interface,
In, N is natural number.
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| CN201410401356.6A CN104218935B (en) | 2014-08-15 | 2014-08-15 | Integral type capacitor induction type key panel and its recognition by pressing keys method |
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| CN201410401356.6A CN104218935B (en) | 2014-08-15 | 2014-08-15 | Integral type capacitor induction type key panel and its recognition by pressing keys method |
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| CN104218935A CN104218935A (en) | 2014-12-17 |
| CN104218935B true CN104218935B (en) | 2018-07-27 |
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Families Citing this family (2)
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| CN106033966B (en) * | 2015-03-17 | 2019-04-02 | 佛山市顺德区美的电热电器制造有限公司 | The recognition methods of key triggering and device |
| CN113534971B (en) * | 2021-09-14 | 2022-01-28 | 深圳市柔宇科技股份有限公司 | Touch keyboard and identification method of touch keys |
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| CN102427357A (en) * | 2011-12-07 | 2012-04-25 | 江苏惠通集团有限责任公司 | Capacitor touch key system |
| CN102522977A (en) * | 2011-10-28 | 2012-06-27 | 江苏惠通集团有限责任公司 | Touch key structure and touch device |
| CN102571058A (en) * | 2011-10-28 | 2012-07-11 | 江苏惠通集团有限责任公司 | Touch key structure and touch device |
| CN202548791U (en) * | 2011-12-27 | 2012-11-21 | Tcl通力电子（惠州）有限公司 | Touch screen symbol display structure and touch screen display device |
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| TWM290591U (en) * | 2005-09-23 | 2006-05-11 | Elan Microelectronics Corp | Pushbutton touch panel module |
| US9490804B2 (en) * | 2011-09-28 | 2016-11-08 | Cypress Semiconductor Corporation | Capacitance sensing circuits, methods and systems having conductive touch surface |
| TWI474243B (en) * | 2012-10-05 | 2015-02-21 | Touchplus Information Corp | Capacitive touch sensing keyboard |
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| CN102522977A (en) * | 2011-10-28 | 2012-06-27 | 江苏惠通集团有限责任公司 | Touch key structure and touch device |
| CN102571058A (en) * | 2011-10-28 | 2012-07-11 | 江苏惠通集团有限责任公司 | Touch key structure and touch device |
| CN102427357A (en) * | 2011-12-07 | 2012-04-25 | 江苏惠通集团有限责任公司 | Capacitor touch key system |
| CN202548791U (en) * | 2011-12-27 | 2012-11-21 | Tcl通力电子（惠州）有限公司 | Touch screen symbol display structure and touch screen display device |
| CN103391087A (en) * | 2013-07-17 | 2013-11-13 | 江苏中科天安智联科技有限公司 | Vehicle-mounted touch key structure |
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