CN201805414U - ITO (Indium Tin Oxide) film approach inductive key - Google Patents
ITO (Indium Tin Oxide) film approach inductive key Download PDFInfo
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- CN201805414U CN201805414U CN2010205258125U CN201020525812U CN201805414U CN 201805414 U CN201805414 U CN 201805414U CN 2010205258125 U CN2010205258125 U CN 2010205258125U CN 201020525812 U CN201020525812 U CN 201020525812U CN 201805414 U CN201805414 U CN 201805414U
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- thin film
- ito thin
- ito
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Abstract
The utility model discloses an ITO (Indium Tin Oxide) film approach inductive key, comprising a surface protective film, an ITO film layer, a FPC (Flexible Printed Circuit) board, a bottom protective film and a main circuit for performing the function of a capacitative touch key, wherein the surface protective film and the bottom protective film are made of insulation materials. The surface protective film, the ITO film layer, the FPC board and the bottom protective film are sequentially arrayed and laminated, the ITO film layer is divided into a plurality of key areas, which are mutually isolated, and an approach inductive line, the key areas are arrayed into a line parallel to the approach inductive line, a section of gap is retained between the line of the key areas and the approach inductive line, and the key areas and the approach inductive line are connected with the external main circuit through a lead wire on the FPC board. The utility model has high sensitivity and strong anti-jamming capability, the key is transparent in appearance, can be subjected to bending, folding and other changes, and can meet the requirements on thinness and attractiveness of the keys of the traditional electronic products.
Description
Technical field
The utility model relates to a kind of near induced key, relates in particular to a kind of ito thin film near induced key, belongs to the electronic key technical field.
Background technology
The button of the present mechanical structure of using always has easy to wear, and complexity is installed, and is subjected to shortcomings such as such environmental effects such as temperature, humidity, dust are bigger, and its production cost height, and the technological requirement complexity is difficult to satisfy present electronic product button demand frivolous, attractive in appearance.
Ito thin film is the recent very fast a kind of conductive film of development, and chemically, ITO is the abbreviation of Indium TinOxides.Ito thin film has the good conductivity and the transparency as the nano indium tin metal oxide, can block harmful electron radiation, ultraviolet ray and far infrared.Therefore, ito thin film is sprayed on glass, on plastics and the electronic display after, utilize its conductivity and the transparency can constitute touch function, have radiation proof and antiultraviolet, ultrared function simultaneously.In oxide conductive film, to mix S
nI
N2O
3(ITO) transmitance of film is the highest best with electric conductivity, and etches trickle figure easily in acid solution. and its light transmittance can reach more than 90%.ITO film light transmittance and resistance are respectively by I
N2O
3With S
N2O
3Ratio control common S
N2O
3: I
N2O
3=1: 9, be used for contact panel, touch-screen, cold light film etc. more.
Along with industry is constantly released electronic component, the integrated chip with super low-power consumption, people have also grasped the method for designing of super low-power consumption Circuits System, ito thin film and FPC flexible PCB are used in combination, make the version of key device become varied, have wide development space.
The utility model content
The purpose of this utility model is to provide a kind of ito thin film near induced key, adopts ito thin film as the electrode in the capacitance touch induced key, makes full use of the advantage that the ito thin film transmitance is high and conduct electricity very well.
The purpose of this utility model is achieved by the following technical programs:
A kind of ito thin film is near induced key, comprises surface protection film 1, ito thin film layer 2, FPC flexible PCB 3, bottom diaphragm 4 and finishes the main circuit 5 of capacitance touch keypress function, and wherein surface protection film 1, bottom diaphragm 4 are made by insulating material.Described surface protection film 1; ito thin film layer 2; FPC flexible PCB 3; bottom diaphragm 4 is arranged in order and is formed by stacking; wherein ito thin film layer 2 is divided into a plurality of isolated mutually key areas 9; key area 9 etches various identification patterns; described ito thin film layer 2 comprises that also an ito thin film line conduct is near the line of induction 10; described a plurality of key area 9 forms a line; with parallel near the line of induction 10 and leave an intersegmental crack; key area 9 be connected with lead-in wire on the FPC flexible PCB 3 respectively near the line of induction 10, the lead-in wire on the described FPC flexible PCB 3 is connected with outside main circuit 5.
The purpose of this utility model can also further realize by following technical measures:
Aforesaid ito thin film is near induced key, and wherein main circuit 5 is connected to form successively by oscillating circuit 6, testing circuit 7 and microprocessor 8, and the lead-in wire of described FPC flexible PCB 3 connects the input of oscillating circuit 6.
Compared with prior art, the beneficial effects of the utility model are: ito thin film has advantage highly sensitive, strong interference immunity near induced key.And its button profile is transparent, can carry out bending, variation such as folding, makes the appearance design of this kind button that innovative space more be arranged, and can satisfy present electronic product button demand frivolous, attractive in appearance.
Description of drawings
Fig. 1 is a structure chart of the present utility model.
Fig. 2 is the distribution map of ito thin film layer.
Fig. 3 is the circuit structure diagram of main circuit.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the utility model comprises surface protection film 1, ito thin film layer 2, FPC flexible PCB 3, bottom diaphragm 4 and finishes the main circuit 5 of capacitance touch keypress function, and wherein surface protection film 1, bottom diaphragm 4 are made by insulating material.Described surface protection film 1, ito thin film layer 2, FPC flexible PCB 3, bottom diaphragm 4 are arranged in order and are formed by stacking.As shown in Figure 2, wherein ito thin film layer 2 is divided into a plurality of isolated mutually key areas 9, and key area 9 etches various identification patterns, and its size is corresponding with thumbnail size, to reach best sensitivity, realizes good sensing.Described ito thin film layer 2 comprises that also an ito thin film line conduct is near the line of induction 10, described a plurality of key area 9 forms a line, with parallel near the line of induction 10 and leave an intersegmental crack, key area 9 be connected with lead-in wire on the FPC flexible PCB 3 respectively near the line of induction 10, the lead-in wire on the described FPC flexible PCB 3 is connected with outside main circuit 5.As shown in Figure 3, main circuit 5 is connected to form successively by oscillating circuit 6, testing circuit 7 and microprocessor 8, and the lead-in wire of described FPC flexible PCB 3 connects the input of oscillating circuit 6.
Method for designing of the present utility model adopts the mode of staggered form, can reduce influencing each other between the button like this.Because cover layer is thinner, so need that good isolation is arranged between the button.In the wiring of FCB plate, ground plane and button are positioned at the same side of printed board, adopt the 0.5mm gap size, can make the field penetration cover layer well.5 pairs of induced signals of described main circuit amplify, detect, to near the operating current threshold value setting of the line of induction 10 correspondences the operating current threshold values of 9 correspondences much smaller than the key area, when hand when the button, electric capacity between human body and ground is superimposed upon near on the line of induction 10 and the key area 9 with the parallel connection relation, electric capacity changes, thereby form the transfer of electric charge, output to main circuit 5 by silver slurry line, the electric current that produces near the line of induction 10 capacitance variations is greater than its operating current threshold values, the electric current that key area 9 capacitance variations produce is less than its operating current threshold values, so 8 capacitance variations that detect near the line of induction 10 of microprocessor.When practical application, detect near the back lighting of button being opened after the capacitance variations of the line of induction 10, operate to make things convenient for the user.Simultaneously, microprocessor 8 reduces the setting of key area 9 operating current threshold values, when finger is pressed certain key area 9, electric capacity between human body and ground is superimposed upon on button 9 zones with the parallel connection relation, and capacitance change increases, and electric charge shifts, output to main circuit 5 by silver slurry line, the electric current that it produced is greater than the actuation of keys current threshold after reducing, and main circuit 5 detects signal, thereby finishes corresponding actuation of keys.
The utility model has been overturned the method for designing of conventional keys, has prolonged the useful life of button greatly.The beneficial effects of the utility model are that ito thin film capacitance touch button has advantage highly sensitive, strong interference immunity.And the button profile is transparent, can carry out bending, variation such as folding, make the appearance design of button that innovative space more be arranged, make the appearance design of button that innovative space more be arranged, can change simple-minded, the loaded down with trivial details outward appearance of traditional design, give novel unique, simple generous experience.This kind button can be widely used in consumer electronics product, for example products such as LCDTV/Monitor, DPF, small household appliances, home audio, educational, toys, PC periphery class, hand-held communication class.
In addition to the implementation, the utility model can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of the utility model requirement.
Claims (2)
1. an ito thin film is near induced key, it is characterized in that, comprise surface protection film (1), ito thin film layer (2), FPC flexible PCB (3), bottom diaphragm (4) and finish the main circuit (5) of capacitance touch keypress function, wherein surface protection film (1), bottom diaphragm (4) are made by insulating material; Described surface protection film (1); ito thin film layer (2); FPC flexible PCB (3); bottom diaphragm (4) is arranged in order and is formed by stacking; wherein ito thin film layer (2) is divided into a plurality of isolated mutually key areas (9); key area (9) etches various identification patterns; described ito thin film layer (2) comprises that also an ito thin film line conduct is near the line of induction (10); described a plurality of key area (9) forms a line; with parallel near the line of induction (10) and leave an intersegmental crack; key area (9) be connected with lead-in wire on the FPC flexible PCB (3) respectively near the line of induction (10), the lead-in wire on the described FPC flexible PCB (3) is connected with outside main circuit (5).
2. ito thin film as claimed in claim 1 is near induced key, it is characterized in that, described main circuit (5) is connected to form successively by oscillating circuit (6), testing circuit (7) and microprocessor (8), and the lead-in wire of described FPC flexible PCB (3) connects the input of oscillating circuit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205258125U CN201805414U (en) | 2010-09-10 | 2010-09-10 | ITO (Indium Tin Oxide) film approach inductive key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205258125U CN201805414U (en) | 2010-09-10 | 2010-09-10 | ITO (Indium Tin Oxide) film approach inductive key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201805414U true CN201805414U (en) | 2011-04-20 |
Family
ID=43874913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205258125U Expired - Fee Related CN201805414U (en) | 2010-09-10 | 2010-09-10 | ITO (Indium Tin Oxide) film approach inductive key |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201805414U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103294265A (en) * | 2013-05-21 | 2013-09-11 | 苏州达方电子有限公司 | Touch keyboard |
| CN104135263A (en) * | 2014-07-28 | 2014-11-05 | 江苏钟山电子器件有限责任公司 | ITO (Indium Tin Oxide) film simulation transparent touch sliding switch |
| CN107203322A (en) * | 2017-05-12 | 2017-09-26 | 歌尔科技有限公司 | Touch sound equipment button and its control method |
-
2010
- 2010-09-10 CN CN2010205258125U patent/CN201805414U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103294265A (en) * | 2013-05-21 | 2013-09-11 | 苏州达方电子有限公司 | Touch keyboard |
| CN104135263A (en) * | 2014-07-28 | 2014-11-05 | 江苏钟山电子器件有限责任公司 | ITO (Indium Tin Oxide) film simulation transparent touch sliding switch |
| CN107203322A (en) * | 2017-05-12 | 2017-09-26 | 歌尔科技有限公司 | Touch sound equipment button and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20160910 |