CN204331693U - A kind of projecting type capacitor touch screen - Google Patents
A kind of projecting type capacitor touch screen Download PDFInfo
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- CN204331693U CN204331693U CN201420798796.5U CN201420798796U CN204331693U CN 204331693 U CN204331693 U CN 204331693U CN 201420798796 U CN201420798796 U CN 201420798796U CN 204331693 U CN204331693 U CN 204331693U
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Abstract
The utility model discloses a kind of projecting type capacitor touch screen, it comprises a pair of laminar capacitive transducer, and two-layer equation capacitive transducer provides biased by transparent Tx emitting electrode and Rx receiving electrode, and the Tx emitting electrode of below determines multiple single pixel of display screen; The Rx receiving electrode of top is then the continuous level covering the whole visual front end of display screen, exchange Vcom voltage be direct current and 3.3V between the square wave that shakes back and forth, exchange the usual each display line of Vcom level to switch once, therefore, the interchange Vcm frequency produced is 1/2 of display frame refresh rate and line number product.By reducing framework cost and obtaining better transparency, Tx array and Rx array are arranged on two-sided ito glass layer by projecting type capacitor touch screen, and by each array of independent bridge successively cross-over connection.Therefore, Tx array forms screen layer between LCD plane and Rx receiving electrode, can remove electromagnetic interference (EMI) situation.
Description
Technical field
The utility model relates to technical field of electronic products, relates to a kind of projecting type capacitor touch screen specifically.
Background technology
Projected capacitive touch screen is that a kind of electric current of human body that adopts responds to the Touch Screen product carrying out work, and capacitance touch controls employing one surface that transmitter (as ITO) does coating and carrys out stored charge.
Capacitance type touch control screen utilizes the induction of the electric current of human body to carry out work.Please refer to accompanying drawing 1, traditional capacitance type touch control screen is one piece of four layers of compound glass screen.In Fig. 1, be from top to bottom skin glass 11, Optical transparent adhesive 12, two-sided ito glass 13, Optical transparent adhesive 14 successively.The inside surface of two-sided ito glass 13 and interlayer respectively scribble one deck plated film electro-conductive glass ITO coating; outermost layer skin glass 11 is skim silicon soil glassivations; ITO coating is as workplace, and four electrodes are drawn at four angles, and internal layer ITO is that screen layer is to ensure good working environment.When finger touch on the metal layer time, because human body electric field, user and touch screen surface are formed with a coupling capacitance, for high-frequency current, electric capacity is direct conductor, so finger siphons away a very little electric current from contact point.This electric current flows out respectively from the electrode touch screen corner, and the electric current flowing through these four electrodes is directly proportional to the distance of finger to corner, and controller, by the accurate Calculation to these four current ratios, draws the positional information of touch point.
Because capacitance plate is comparatively strong for the induction of electromagnetism, electromagnetic interference (EMI) can produce larger impact for the system performance of touch screen, can be capacitively coupled to touch panel device from inner or outside interference voltage.These interference voltages can cause the charge movement in touch-screen, can cause obscure charge movement measurement during finger Touch Screen.
Utility model content
For deficiency of the prior art, the technical problems to be solved in the utility model there are provided the strong projecting type capacitor touch screen of a kind of antijamming capability.
For solving the problems of the technologies described above, the utility model is realized by following scheme:
A kind of projecting type capacitor touch screen, it comprises skin glass laminated together from outside to inside, Optical transparent adhesive, two-sided ito glass, Optical transparent adhesive, also comprise one and be arranged on two-layer equation capacitive transducer below skin glass or plastic cover plate, described two-layer equation capacitive transducer is provided with and is connected to Tx emitting electrode on transparent two-sided ito glass and Rx receiving electrode, described Tx emitting electrode and Rx receiving electrode form cross matrix, the node of each Tx emitting electrode and Rx receiving electrode is connected with an electric capacity, the ito surface of emitting electrode is positioned at below Rx receiving electrode ito surface, separated by one layer of polymeric film or optical cement OCA, the direction of Tx emitting electrode is from left to right, the direction of Rx receiving electrode is vertical with the direction of Tx emitting electrode, described touch screen also connects a LCD voltage couples circuit, be electrically connected with in this LCD voltage couples circuit and exchange Vcom level.
Further, described cross matrix is covered with the Tx array of Tx emitting electrode formation and the Rx array of Rx receiving electrode formation, and both centre thin polymer films or optical cement OCA separate, and the Tx line of Tx emitting electrode occupies the whole width of Tx array pitch.
Further, one end of described interchange Vcom level is connected electrically on Voltage coupling device, and the other end is electrically connected with LCD.
Relative to prior art, the beneficial effects of the utility model are: two-layer equation capacitive transducer provides biased by transparent Tx emitting electrode and Rx receiving electrode, and the Tx emitting electrode of below determines multiple single pixel of display screen; The Rx receiving electrode of top is then the continuous level covering the whole visual front end of display screen, exchange Vcom voltage be direct current and 3.3V between the square wave that shakes back and forth, exchange the usual each display line of Vcom level to switch once, therefore, the interchange Vcm frequency produced is 1/2 of display frame refresh rate and line number product.By reducing framework cost and obtaining better transparency, Tx array and Rx array are arranged on two-sided ito glass layer by projecting type capacitor touch screen, and by each array of independent bridge successively cross-over connection.Therefore, Tx array forms screen layer between LCD plane and Rx receiving electrode, can remove electromagnetic interference (EMI) situation.
Accompanying drawing explanation
Fig. 1 is traditional projecting type capacitor screen touch-control structure.
Fig. 2 is the two-layer equation capacitor sensor structure schematic diagram of the utility model touch screen.
Fig. 3 is the utility model LCD voltage couples circuit diagram.
Embodiment
Below in conjunction with drawings and Examples, the technical solution of the utility model is explained in detail.
Please refer to accompanying drawing 2 ~ 3, a kind of projecting type capacitor touch screen of the present utility model, it comprises skin glass laminated together from outside to inside, Optical transparent adhesive, two-sided ito glass, Optical transparent adhesive, it is characterized in that: also comprise one and be arranged on two-layer equation capacitive transducer 2 below skin glass or plastic cover plate, described two-layer equation capacitive transducer 2 is provided with and is connected to Tx emitting electrode 25 on transparent two-sided ito glass and Rx receiving electrode 26, described Tx emitting electrode 26 and Rx receiving electrode 25 form cross matrix, the node of each Tx emitting electrode 26 and Rx receiving electrode 25 is connected with an electric capacity, the ito surface of Tx emitting electrode 26 is positioned at below Rx receiving electrode 25ITO face, separated by one layer of polymeric film or optical cement OCA23, the direction of Tx emitting electrode 26 is from left to right, the direction of Rx receiving electrode 25 is vertical with the direction of Tx emitting electrode 26, described touch screen also connects a LCD voltage couples circuit 3, be electrically connected with in this LCD voltage couples circuit 3 and exchange Vcom level 31.Described cross matrix is covered with the Tx array of Tx emitting electrode 26 formation and the Rx array of Rx receiving electrode 25 formation, and both centre thin polymer films or optical cement OCA23 separate, and the Tx line of Tx emitting electrode 26 occupies the whole width of Tx array pitch.One end of described interchange Vcom level 31 to be connected electrically on Voltage coupling device 32, and the other end is electrically connected with LCD.
Please refer in accompanying drawing 2, Fig. 2, protective seam 21 is placed in most top layer, the lower floor of protective seam 21 is cover-plate glass 22, the bottom is LCD 24, and two-layer equation capacitive transducer provides biased by transparent Tx emitting electrode and Rx receiving electrode, and the Tx emitting electrode of below determines multiple single pixel of display screen; The Rx receiving electrode of top is then the continuous level covering the whole visual front end of display screen, exchange Vcom voltage be direct current and 3.3V between the square wave that shakes back and forth, exchange the usual each display line of Vcom level to switch once, therefore, the interchange Vcm frequency produced is 1/2 of display frame refresh rate and line number product.By reducing framework cost and obtaining better transparency, Tx array and Rx array are arranged on two-sided ito glass layer by projecting type capacitor touch screen, and by each array of independent bridge successively cross-over connection.Therefore, Tx array forms screen layer between LCD plane and Rx receiving electrode, can remove electromagnetic interference (EMI) situation.
The foregoing is only preferred implementation of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model instructions and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (3)
1. a projecting type capacitor touch screen, it comprises skin glass laminated together from outside to inside, Optical transparent adhesive, two-sided ito glass, Optical transparent adhesive, it is characterized in that: also comprise one and be arranged on two-layer equation capacitive transducer (2) below skin glass or plastic cover plate, described two-layer equation capacitive transducer (2) is provided with and is connected to Tx emitting electrode (25) on transparent two-sided ito glass and Rx receiving electrode (26), described Tx emitting electrode (26) and Rx receiving electrode (25) form cross matrix, the node of each Tx emitting electrode (26) and Rx receiving electrode (25) is connected with an electric capacity, the ito surface of Tx emitting electrode (26) is positioned at below Rx receiving electrode (25) ito surface, by one layer of polymeric film or optical cement OCA(23) separate, the direction of Tx emitting electrode (26) is from left to right, the direction of Rx receiving electrode (25) is vertical with the direction of Tx emitting electrode (26), described touch screen also connects a LCD voltage couples circuit (3), be electrically connected with in this LCD voltage couples circuit (3) and exchange Vcom level (31).
2. a kind of projecting type capacitor touch screen according to claim 1, it is characterized in that: described cross matrix is covered with Tx array that Tx emitting electrode (26) formed and the Rx array that Rx receiving electrode (25) is formed, both centre thin polymer film or optical cement OCA(23) separate, the Tx line of Tx emitting electrode (26) occupies the whole width of Tx array pitch.
3. a kind of projecting type capacitor touch screen according to claim 1, is characterized in that: one end of described interchange Vcom level (31) is connected electrically in (32) on Voltage coupling device, and the other end is electrically connected with LCD (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420798796.5U CN204331693U (en) | 2014-12-17 | 2014-12-17 | A kind of projecting type capacitor touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420798796.5U CN204331693U (en) | 2014-12-17 | 2014-12-17 | A kind of projecting type capacitor touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204331693U true CN204331693U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420798796.5U Expired - Fee Related CN204331693U (en) | 2014-12-17 | 2014-12-17 | A kind of projecting type capacitor touch screen |
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| Country | Link |
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| CN (1) | CN204331693U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111309196A (en) * | 2020-03-12 | 2020-06-19 | 湖南锐阳电子科技有限公司 | Reconfigurable capacitive touch array and reconfiguration method thereof |
| CN113413152A (en) * | 2021-05-27 | 2021-09-21 | 深圳中学 | Non-contact finger motion detection instrument and method |
-
2014
- 2014-12-17 CN CN201420798796.5U patent/CN204331693U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111309196A (en) * | 2020-03-12 | 2020-06-19 | 湖南锐阳电子科技有限公司 | Reconfigurable capacitive touch array and reconfiguration method thereof |
| CN111309196B (en) * | 2020-03-12 | 2022-08-09 | 湖南锐阳电子科技有限公司 | Reconfigurable capacitive touch array and reconfiguration method thereof |
| CN113413152A (en) * | 2021-05-27 | 2021-09-21 | 深圳中学 | Non-contact finger motion detection instrument and 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 |
Granted publication date: 20150513 Termination date: 20201217 |
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| CF01 | Termination of patent right due to non-payment of annual fee |