CN201465086U - Anti-interference capacitive touch screen and electronic device - Google Patents
Anti-interference capacitive touch screen and electronic device Download PDFInfo
- Publication number
- CN201465086U CN201465086U CN2009201335223U CN200920133522U CN201465086U CN 201465086 U CN201465086 U CN 201465086U CN 2009201335223 U CN2009201335223 U CN 2009201335223U CN 200920133522 U CN200920133522 U CN 200920133522U CN 201465086 U CN201465086 U CN 201465086U
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- touch panel
- circuit layer
- touch screen
- low esr
- capacitive touch
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Abstract
The utility model is applicable to the technical field of the touch sensor, and provides an anti-interference capacitive touch screen and an electronic device. The capacitive touch screen comprises a display unit, a transparent touch panel which is arranged on the display unit and a touch panel control circuit which is connected with the transparent touch panel, wherein the transparent touch panel comprises a touch induced circuit layer and a shielding circuit layer made of transparent conductive medium, and the periphery of the shielding circuit layer is provided with a low-resistance anti-grounding area which is connected with the referent grounding point of the touch panel control circuit. Since the single-point grounding of the touch panel made of ITO material or the shielding circuit layer of the touch screen is transformed into the multi-point grounding or plane grounding, the utility model improves the anti-interference performance of the display equipment with the touch panel. Moreover, the ITO shielding layer is not required to be deliberately thickened to reduce the square resistance, thereby ensuring the light transmittance of the overall equipment.
Description
Technical field
The utility model belongs to the touch sensor technologies field, relates in particular to a kind of anti-interference capacitor formula touch-screen and electronic equipment.
Background technology
Current increasing electronic product provides the touch operation interface, in the various touch interfaces, includes touch key-press, touches draw runner or touches pulley and touch panel or touch-screen.In the scheme of touch panel, display device be in touch panel under, display device can cause a series of problems such as the location of touch panel is inaccurate, positioning point coordinate shake to the undesired signal of touch panel, has a strong impact on the electric property of touch panel.
In order to solve the interference problem of display device to touch panel, adopt mostly between touch panel and display device, promptly using ITO (tin indium oxide) material to design the scheme of screen layer under the touch panel with directly over the display device.
Accompanying drawing 1 is depicted as existing ITO screen layer scheme, housing 1 expression entire I TO screen layer, and the visible area of inside casing 2 expression ITO screen layers, two middle parts of frame are non-visible areas of ITO screen layer.Because ITO is a kind of transparent conductive material, there is certain square resistance, cause the face resistance of each point on the screen layer widely different, little near the face resistance in the place of earth point 3, can be by earth point 3 undesired signal that display device produces touch panel of releasing; And big away from the face resistance in the place of earth point 3, this moment, earth point 3 undesired signal that display device produces touch panel of can not releasing the situation that interference that display device produces touch panel can't filtering occurred for whole touch panel.
In order to reduce the square resistance of screen layer, the face resistance of each point on the screen layer is reached unanimity, reach the purpose that the shielding display device disturbs touch panel, the ITO screen layer of thickening commonly used or the way that improves the shared ratio of tin in the indium tin oxide reduce square resistance on the technology.But because the shared ratio of tin has a significant impact the light transmission of touch panel again in the thickness of increase ITO (tin indium oxide) screen layer or the increase indium tin oxide, so the method can not become optimum solution.
The utility model content
The purpose of this utility model is to provide a kind of anti-interference capacitor formula touch-screen and electronic equipment, is intended to solve that existing anti-interference capacitor formula touch-screen can't be taken into account high transmission rate and to the problem of the strong anti-interference of display device.
The utility model is achieved in that a kind of capacitive touch screen, comprises display unit, is positioned at the transparent touch panel on the described display unit, the touch panel control circuit that is connected with described transparent touch panel; Wherein said transparent touch panel comprises touch induction circuit layer and the screened circuit layer of being made by transparent conductive medium, is provided with the Low ESR access area of the reference earth point that is connected to described touch panel control circuit around the described screened circuit layer.
Further, described Low ESR access area is a zone of being made by the Low ESR conductive material that covers on the non-visible area of described screened circuit layer.
Further, described Low ESR conductive material is silver slurry or aluminium foil.
Further, described Low ESR access area comprises a plurality of earth terminals that are arranged on the non-visible area of described screened circuit layer, and described a plurality of earth terminals all are connected to the reference earth point of described touch panel control circuit.
Further, described Low ESR access area is the metal frame that is crimped on the non-visible area of described screened circuit layer, and described metal frame is connected to the reference earth point of described touch panel control circuit.
Another purpose of the present utility model is to provide a kind of electronic equipment, comprises aforesaid anti-interference capacitor formula touch-screen.
The utility model is by being changed into the screened circuit layer with the touch panel of ITO material or touch-screen the mode of multipoint earthing or face ground connection by the mode of single-point grounding, improved the anti-display device interference capability of touch panel, and need not painstakingly remove to thicken the ITO layer for reducing square resistance, also help to guarantee whole transmittance.
Description of drawings
Fig. 1 is the design concept figure of ITO screen layer in the touch panel that provides of prior art;
Fig. 2 is the design concept figure of the screened circuit layer that provides of the utility model first embodiment;
Fig. 3 is the annexation synoptic diagram of the reference earth point of the access area of touch panel shown in Figure 2 and touch panel control circuit;
Fig. 4 is the design concept figure of the screened circuit layer that provides of the utility model second embodiment;
Fig. 5 is the design concept figure of the screened circuit layer that provides of the utility model the 3rd embodiment;
Fig. 6 is the analysis of electric field figure of the screen layer of touch panel interference source when not adopting above-mentioned Low ESR access area;
Fig. 7 is the analysis of electric field figure of the screen layer of touch panel interference source when adopting above-mentioned Low ESR access area.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Among the utility model embodiment, (being in the non-visible area) is provided with the Low ESR access area around the ITO screen layer, and this Low ESR access area is connected to the reference earth point of touch panel control circuit.Wherein this Low ESR access area can be a Low ESR conductive material that covers on the non-visible area of ITO screen layer, also can be for being arranged on a plurality of earth terminals of non-visible area, can also be for being crimped on the metal frame on the non-visible area, and division is as follows.
Fig. 2 is the design concept that the screened circuit layer that the utility model first embodiment provides, and for convenience of description, only shows the part relevant with the utility model.
With reference to Fig. 2, housing 1 expression entire I TO screen layer, the visible area of inside casing 2 expression ITO screen layers, two middle parts of frame are non-visible areas of ITO screen layer, non-visible area has an earth terminal 3.Cover Low ESR conductive material 4 around the non-visible area, the circuit of Low ESR conductive material 4 below the access area link to each other with the reference earth point of touch panel control circuit, as shown in Figure 3, realize reducing the impedance of ITO screen layer far-end, the filtering display device is to the interference of touch panel.
Further, above-mentioned Low ESR conductive material 4 can be starched for silver, also can be aluminium foil.
Fig. 4 shows the design concept of the screened circuit layer that the utility model second embodiment provides, be with the above-mentioned first embodiment difference, the Low ESR access area comprises a plurality of earth terminals 3 that are arranged on the non-visible area of screened circuit layer, described a plurality of earth terminal 3 all is connected to the reference earth point of touch panel control circuit, realize reducing the impedance of ITO screen layer far-end, the filtering display device is to the interference of touch panel.
Fig. 5 shows the design concept of the screened circuit layer that the utility model the 3rd embodiment provides, be with above-mentioned first, second embodiment difference, the Low ESR access area is the metal frame 5 that is crimped on the ITO of the non-visible area of screened circuit layer, metal frame 5 also is connected to the reference earth point of touch panel control circuit, realize reducing the impedance of ITO screen layer far-end, the filtering display device is to the interference of touch panel.
Fig. 6, Fig. 7 are respectively the analysis of electric field contrasts of screen layer interference source when not adopting above-mentioned Low ESR access area and when adopting above-mentioned Low ESR access area.When interference source is far away apart from zero potential point as seen from Figure 6, there is not to arrive fast the path of zero potential, cause this zone to keep high potential (wherein regional A successively decreases to the electromotive force of regional J), strong with touch panel sense channel formation coupled interference, influence the stability of capacitance detecting.And for Fig. 7, the electromotive force of interference source then reduces very fast (wherein area E is successively decreased to the electromotive force of regional A), and the interference source range of influence is very little, and the interference attenuation of the electromotive force that electrostatic induction forms also can be very fast, to form coupled interference faint with the touch panel sense channel, can not influence the stability of capacitance detecting.
The anti-interference capacitor formula touch-screen that the utility model embodiment provides comprises display unit, is positioned at the transparent touch panel on the display unit, the touch panel control circuit that is connected with transparent touch panel, wherein transparent touch panel comprises touch induction circuit layer and the screened circuit layer of being made by transparent conductive medium below it again, and this screened circuit layer can adopt the design among above-mentioned arbitrary embodiment.
During above-mentioned anti-interference capacitor formula touch-screen can be used in any electronic equipment with touch screen function, as various self-help intelligent terminals etc.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. a capacitive touch screen comprises display unit, is positioned at the transparent touch panel on the described display unit, the touch panel control circuit that is connected with described transparent touch panel; Wherein said transparent touch panel comprises touch induction circuit layer and the screened circuit layer of being made by transparent conductive medium, it is characterized in that, be provided with the Low ESR access area of the reference earth point that is connected to described touch panel control circuit around the described screened circuit layer.
2. capacitive touch screen as claimed in claim 1 is characterized in that, described Low ESR access area is a zone of being made by the Low ESR conductive material that covers on the non-visible area of described screened circuit layer.
3. capacitive touch screen as claimed in claim 2 is characterized in that, described Low ESR conductive material is the silver slurry.
4. capacitive touch screen as claimed in claim 2 is characterized in that, described Low ESR conductive material is an aluminium foil.
5. capacitive touch screen as claimed in claim 1, it is characterized in that, described Low ESR access area comprises a plurality of earth terminals that are arranged on the non-visible area of described screened circuit layer, and described a plurality of earth terminals all are connected to the reference earth point of described touch panel control circuit.
6. capacitive touch screen as claimed in claim 1 is characterized in that, described Low ESR access area is the metal frame that is crimped on the non-visible area of described screened circuit layer, and described metal frame is connected to the reference earth point of described touch panel control circuit.
7. an electronic equipment is characterized in that, comprises as each described capacitive touch screen of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201335223U CN201465086U (en) | 2009-07-03 | 2009-07-03 | Anti-interference capacitive touch screen and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201335223U CN201465086U (en) | 2009-07-03 | 2009-07-03 | Anti-interference capacitive touch screen and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201465086U true CN201465086U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201335223U Expired - Lifetime CN201465086U (en) | 2009-07-03 | 2009-07-03 | Anti-interference capacitive touch screen and electronic device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279687A (en) * | 2010-06-08 | 2011-12-14 | 胜华科技股份有限公司 | Touch panel and applied touch display device thereof |
| CN102368187A (en) * | 2011-09-30 | 2012-03-07 | 苏州瀚瑞微电子有限公司 | Anti-interference processing method of single ITO (Indium Tin Oxide) layer |
| CN102446040A (en) * | 2010-10-11 | 2012-05-09 | 联建(中国)科技有限公司 | Resistance type touch control panel |
| CN102486695A (en) * | 2010-12-01 | 2012-06-06 | 株式会社神户制钢所 | Touch pad sensor |
| CN102929470A (en) * | 2012-11-21 | 2013-02-13 | 南京华显高科有限公司 | Method and structure for improving anti-interference of capacitive touch screen |
| US8952903B2 (en) | 2011-03-18 | 2015-02-10 | Tpk Touch Solutions (Xiamen) Inc. | Touch device and fabrication method thereof |
| US9134828B2 (en) | 2011-09-10 | 2015-09-15 | Tpk Touch Solutions (Xiamen) Inc. | Touch panel having a shielding structure and method of manufacturing the same |
| CN105005424A (en) * | 2015-08-12 | 2015-10-28 | 深圳晶华显示器材有限公司 | Touch screen with shielding function and manufacturing method of touch screen |
| CN105426028A (en) * | 2015-11-16 | 2016-03-23 | 珠海格力电器股份有限公司 | Touch equipment and electric appliance |
| TWI550483B (en) * | 2014-02-25 | 2016-09-21 | Tpk Touch Solutions Xiamen Inc | Anti-static touch panel |
| CN107728833A (en) * | 2016-08-12 | 2018-02-23 | 鸿富锦精密工业（深圳）有限公司 | Display device |
| CN109992160A (en) * | 2019-03-29 | 2019-07-09 | 云谷（固安）科技有限公司 | Touch-control display panel and touch control display apparatus |
| CN110967852A (en) * | 2019-11-20 | 2020-04-07 | Tcl华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
-
2009
- 2009-07-03 CN CN2009201335223U patent/CN201465086U/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279687A (en) * | 2010-06-08 | 2011-12-14 | 胜华科技股份有限公司 | Touch panel and applied touch display device thereof |
| CN102279687B (en) * | 2010-06-08 | 2015-03-18 | 胜华科技股份有限公司 | Touch panel and applied touch display device thereof |
| CN102446040A (en) * | 2010-10-11 | 2012-05-09 | 联建(中国)科技有限公司 | Resistance type touch control panel |
| CN102446040B (en) * | 2010-10-11 | 2015-02-18 | 联建(中国)科技有限公司 | Resistance type touch control panel |
| CN102486695B (en) * | 2010-12-01 | 2016-04-06 | 株式会社神户制钢所 | Touch panel sensor |
| CN102486695A (en) * | 2010-12-01 | 2012-06-06 | 株式会社神户制钢所 | Touch pad sensor |
| US8952903B2 (en) | 2011-03-18 | 2015-02-10 | Tpk Touch Solutions (Xiamen) Inc. | Touch device and fabrication method thereof |
| US9134828B2 (en) | 2011-09-10 | 2015-09-15 | Tpk Touch Solutions (Xiamen) Inc. | Touch panel having a shielding structure and method of manufacturing the same |
| CN102368187A (en) * | 2011-09-30 | 2012-03-07 | 苏州瀚瑞微电子有限公司 | Anti-interference processing method of single ITO (Indium Tin Oxide) layer |
| CN102929470A (en) * | 2012-11-21 | 2013-02-13 | 南京华显高科有限公司 | Method and structure for improving anti-interference of capacitive touch screen |
| TWI550483B (en) * | 2014-02-25 | 2016-09-21 | Tpk Touch Solutions Xiamen Inc | Anti-static touch panel |
| CN105005424A (en) * | 2015-08-12 | 2015-10-28 | 深圳晶华显示器材有限公司 | Touch screen with shielding function and manufacturing method of touch screen |
| CN105426028A (en) * | 2015-11-16 | 2016-03-23 | 珠海格力电器股份有限公司 | Touch equipment and electric appliance |
| CN107728833A (en) * | 2016-08-12 | 2018-02-23 | 鸿富锦精密工业（深圳）有限公司 | Display device |
| CN109992160A (en) * | 2019-03-29 | 2019-07-09 | 云谷（固安）科技有限公司 | Touch-control display panel and touch control display apparatus |
| CN109992160B (en) * | 2019-03-29 | 2022-04-15 | 云谷（固安）科技有限公司 | Touch display panel and touch display device |
| CN110967852A (en) * | 2019-11-20 | 2020-04-07 | Tcl华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN110967852B (en) * | 2019-11-20 | 2021-04-27 | Tcl华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN GOODIX TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHENZHEN GOODIX TECHNOLOGY LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 13 floor, block B, Futian Free Trade Zone, Shenzhen, Guangdong, China, Patentee after: Shenzhen Huiding Technology Co., Ltd. Address before: 13 floor, block B, Futian Free Trade Zone, Shenzhen, Guangdong, China, Patentee before: Shenzhen Goodix Technology Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |