CN201503582U - Improved structure for capacitance sensing for touch pad - Google Patents
Improved structure for capacitance sensing for touch pad Download PDFInfo
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- CN201503582U CN201503582U CN 200920154384 CN200920154384U CN201503582U CN 201503582 U CN201503582 U CN 201503582U CN 200920154384 CN200920154384 CN 200920154384 CN 200920154384 U CN200920154384 U CN 200920154384U CN 201503582 U CN201503582 U CN 201503582U
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- stitching
- trackpad
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- capacitance
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Abstract
The utility model discloses an improved structure for capacitance sensing for a touch pad, which is invented to solve the problems of the prior art, such as deformation, blurring, distortion of screen images and the like. The structure is provided with a plurality of transparent X-axis induction line traces and Y-axis induction line traces, wherein, a plurality of capacitance sense units connected with each other are arranged respectively on the X-axis induction line traces and the Y-axis induction line traces, and the X-axis line traces and the Y-axis line traces are arranged in an interwoven and insulated manner so as to enable the capacitance sense units on the X-axis and the Y-axis induction line traces to be arranged in a roughly matrix-shaped pattern within the working region of the touch pad, wherein insulating cloth inside setting clearances between the capacitance sense units is provided with imitated decoration veins of identical or similar light transmittance. The adoption of the structure not only can increase the uniformity in the light transmittance of the capacitance sensing structure, thereby solving the problem of the blurring and distortion of images, but also can increase the setting clearance among the capacitance sense units without reducing the uniformity in the light transmittance, thereby reducing noise capacitance.
Description
Technical field
The utility model relates to a kind of capacitance sensing structure-improved of Trackpad, particularly a kind of Trackpad capacitance sensing structure that reduces the noise capacitance and promote the transmittance homogeneity.
Background technology
Capacitive touch control plate is the moment of utilizing user's finger or conductor to touch on panel to produce a capacity effect, can determine the position of finger or conductor then by the variation of capacitance, reach the purpose of signal input in view of the above; Because capacitive touch control plate can be imported with finger, convenience with input operation, and its input operation need be through not pressing, can not allow panel have to bear alternate stress, distortion to cause the shortcoming of damaging, it forms simple structure again, assembly is few, product yield height, and suitable the use produced in a large number to reduce cost, so be widely used in aspects such as communication, computing machine and consumer electronics product gradually; And the capacitance sensing structure of existing Trackpad has plural X-axis induction stitching and Y-axis induction stitching, on X, Y-axis stitching, be respectively equipped with the capacitive sensing unit that majority is connected to each other, described X-axis stitching and Y-axis stitching are interlaced with each other and insulation is provided with, and make each capacitive sensing unit on X, the Y-axis stitching slightly be rectangular arrangement and are laid within the perform region of this Trackpad; Usually X-axis induction stitching and Y-axis induction stitching adopt transparent conductive film, tin indium oxide (Indium Tin Oxide for example, ITO) material, utilize etch process to remove part not, to mark off each capacitive sensing list, the gap that makes each capacitive sensing unit on X, the Y-axis stitching have proper width each other is to reach the purpose that insulation is provided with; And be provided with in these capacitive sensing unit separations, if gap width too hour then often have EMI or interference capacitors value to occur, causes the sensitivity of capacitive sensing signal and the disappearance that degree of accuracy reduces; But if when gap width strengthened, but can have different transmittance (Transmittance) with the non-position (that is by hollow out position) that is provided with because of these capacitive sensing unit are provided with the position, cause the light refraction inequality that penetrates panel, this result will cause the puzzlement of screen deformation of image, fuzzy distortion.
The utility model content
For overcoming above-mentioned defective, the purpose of this utility model provides a kind of capacitance sensing structure-improved of Trackpad, its mat is filled up the imitative decoration road with identical transmittance being provided with of capacitive sensing unit in the gap, significantly to reduce by the ratio of openwork part, with the flat appearance degree that promotes this capacitance sensing structure and the homogeneity of transmittance, improvement also can strengthen the gap that is provided with of capacitive sensing unit, to reduce the noise capacitance in the puzzlement of the fuzzy distortion of video picture of the display screen of this Trackpad bottom.
For achieving the above object, the capacitance sensing structure of the utility model Trackpad, it has transparent X-axis induction stitching of plural number and Y-axis induction stitching, at X, be respectively equipped with the capacitive sensing unit that majority is connected to each other on the Y-axis stitching, described X-axis stitching and Y-axis stitching are interlaced with each other and insulation is provided with, make X, each capacitive sensing unit on the Y-axis stitching slightly is rectangular arrangement and is laid within the perform region of this Trackpad, and the empire cloth that is provided with in the gap in described capacitive sensing unit is provided with and possesses identical transmittance or transmittance difference value on the imitative decoration road (Dummy Pattern) below 6%.
Preferably, imitative decoration road and this X-axis induction stitching and Y-axis induction stitching are arranged on the same layer plane.Best, they all are the materials that adopts identical material, the transparent conductive film of tin indium oxide (ITO), poly-enedioxy thiophene (PEDOT) for example, therefore can utilize to once finishing setting in the etch process of this transparent conductive film simultaneously, so can not increase operational procedure or production cost extraly.
Preferably, this imitative decoration road and this X-axis induction stitching is arranged on the same layer plane.
Preferably, this imitative decoration road and this Y-axis induction stitching is arranged on the same layer plane.
Preferably, this imitative decoration road and this X-axis induction stitching and/or Y-axis induction stitching are arranged on the different layers plane.
Preferably, this imitative decoration road keeps an interval that is not connected and is mutually insulated with the edge of this X-axis sensing unit and Y-axis sensing unit respectively, usually should be at interval less than below the 50 μ m.
For achieving the above object, the capacitance sensing structure of this Trackpad of the present utility model, comprise a substrate and top panel, between two plates, be provided with a capacitive sensing layer, and utilize a cementing layer that the two plates gluing that coincides is become a plate body, in the perform region of this Trackpad, this capacitive sensing layer contains a plurality of sensing units, make and be equidistant and staggered layout between the described sensing unit each other, and fill out to establish and possess identical transmittance or printing opacity rate variance and value on the imitative decoration road below 6% on the insulation ground that is provided with in the gap of aforementioned sensing unit, to reach lifting enhancement appearance flatness and transmittance uniformity coefficient.
Preferential, above-mentioned sensing unit is a triangle, also can be rectangle or other geometric configuration.
Adopt said structure, can promote the transmittance uniformity coefficient of this capacitance sensing structure, improve the disappearance of the fuzzy distortion of video picture, simultaneously, can under the situation of transmittance uniformity coefficient that do not detract, strengthen the gap that is provided with of capacitive sensing unit, to reduce the noise capacitance.
Description of drawings
Fig. 1 is the planimetric map of the substrate of the utility model first embodiment;
Fig. 2 is the synoptic diagram that the A portion of first figure amplifies;
Fig. 3 is the side cut-away view of the component composition of the utility model first embodiment;
Fig. 4 is the planimetric map of the substrate of the utility model second embodiment; And
The cut-away view that Fig. 5 is figure four behind the component composition of C-C transversal.
Embodiment
Be a preferred embodiment of the present utility model as shown in Figure 1 to Figure 3, the capacitance sensing structure of this Trackpad comprises a substrate 1 and top panel 2, tool one capacitive sensing layer 12 on a surface of this substrate 1 or top panel 2, and utilize a cementing layer 3 that the superimposed gluing of two plates is become a plate body; This substrate 1 and top panel 2 are the insulativity thin layer of glass sheet material of a high transmission rate, and this cementing layer 3 then is the transparent UV glue of insulativity; Surface periphery in this top panel 2 is provided with coloured mask 21 that metal sputtering forms, in order to cover metal guide passage 15a, the 15b that is located at this substrate 1 edge; Upper surface at this substrate 1 then is provided with a capacitive sensing layer 12, one barrier layer 13 and a jumper connection conductive layer 14, wherein, this capacitive sensing layer 12 is the transparent conductive film of a tin indium oxide material, the transparent X-axis stitching 121 that it contains most X axis equidistant placement and is arranged in parallel with each other, and most Y-axis are to equidistant placement and the transparent Y-axis stitching 122 that is arranged in parallel with each other, and making X-axis stitching 121 and Y-axis stitching 122 be matrix form is crisscross arranged, again, each sensing unit 121a on aforementioned indivedual X-axis stitching 121 is connected with each other logical, each sensing unit 122a on indivedual Y-axis stitchings 122 then is disconnected spaced each other, and with the electric respectively metal guide passage 15a that is located at this substrate 1 edge that is connected to of an ora terminalis of aforementioned each X-axis stitching 121 and Y- axis stitching 122,15b, and be connected to signal output end (not being shown in drawing), make the sensor signal of X-axis stitching 121 and Y-axis stitching 122 on this inductive layer 12 be sent to a follow-up signal processing circuit in view of the above via this signal output end; This barrier layer 13 has plural number insulation screening face and is to use the mylar material that high transmission rate and dielectric coefficient are about 3, thickness is about 1.5 μ m, and the covering area and can cover those at least completely and pass through X-axis stitching part 121b between two adjacent arrangement sensing unit 122a on the Y-axis stitching of this insulation screening face; This jumper connection conductive layer 14 is provided with plural number and carries over the electrical lead that Y-axis line direction is provided with, these electrical leads are to use the opaque metal conductor of line footpath less than 15 μ m, and these electrical lead two ora terminalis have than the electrical lead body the more long-pending electricity of large contact surface meet portion 141, and this electrical lead is set at the upper surface that the insulation of aforementioned barrier layer 13 hides face, and makes the electricity of these electrical lead two ends meet portion 141 to be stretched and put outside this insulation screening face; When this capacitive sensing layer 12, barrier layer 13 and jumper connection conductive layer 14 make up, make the insulation of described barrier layer 13 face that hides be arranged between the two adjacent arrangement sensing unit 122a on the Y-axis stitching by correspondence, the covering of will insulating by the X-axis stitching part 121b between this two adjacent arrangement sensing unit, and the electricity of electrical lead two ora terminalis of described jumper connection conductive layer 14 connect portion 141 just can be respectively electricity be connected to two adjacent sensing unit 122a on the Y-axis stitching, electricity is logical in succession each other to make each sensing unit on indivedual Y-axis stitchings 122, thereby forms a capacitance sensing structure.In addition, being provided with of X-axis sensing unit 121a in the utility model embodiment on this capacitive sensing floor 12 and Y-axis sensing unit 122a also filled out in the gap and is provided with imitative decoration road 129, and make this imitative decoration road 129 keep a 129a and not being connected at interval with the edge of this X-axis sensing unit 121a and Y-axis sensing unit 122a respectively, usually 129a is about 20 μ m-50 μ m at interval, and in ideal, should imitative decoration road 129 be to have identical material with this X-axis sensing unit 121a and Y-axis sensing unit 122a, that is the transparent conductive film of tin indium oxide material, thereby make this capacitive sensing layer 12 have the comparatively transmittance of homogeneous.
Comply with the capacitance sensing structure that above-mentioned explanation is formed, can between X-axis stitching 121 and metal guide passage 15a, form an equivalent capacity, and between Y-axis stitching 122 and metal guide passage 15b, also there is an equivalent capacity, therefore when finger or conductor touches or gently slip over Trackpad when surperficial, signal processing circuit utilizes changes in capacitance, can judge the touch location of conductor or finger; Trackpad of the present utility model in view of the above is one to have the plate body of the high grade of transparency, and is therefore configurable before the display screen of electronic product, and the indication that the user can be seen through on the screen-picture be touched in the panel desired location with finger, can facility carry out input operation.
The capacitance sensing structure of aforementioned utility model embodiment be with X axis and Y-axis to the induction stitching be arranged on the same layer plane--that is same capacitive sensing layer 12, can make the installation position of respectively responding to stitching accurate, and establish imitative decoration road 129 by filling out in the gap being provided with of each X-axis, Y-axis sensing unit, can significantly reduce the ratio of the openwork part on the capacitive sensing layer 12, to promote the transmittance uniformity coefficient of promoting appearance flatness and Trackpad, improve the disappearance of the fuzzy distortion of video picture; Again, utilize the means that are provided with on this imitative decoration road 129, can under the situation that does not increase the openwork part ratio on the capacitive sensing layer 12, enlarge the gap that is provided with between X-axis sensing unit and the Y-axis sensing unit, to reach the purpose that reduces the noise capacitance; For another preceding described, should be the employing same material with this X-axis, Y- axis sensing unit 121a, 122a and be formed on the same capacitive sensing floor 12 in imitative decoration road 129, therefore can utilize to once finishing setting in the etch process of this capacitive sensing layer 12 simultaneously, so can not increase operation or production cost extraly.
Fig. 4 is to Figure 5 shows that second embodiment of the present utility model, the capacitance sensing structure of this Trackpad is slightly identical with aforementioned first embodiment, that is it comprises a substrate 4 and top panel 5, is provided with a capacitive sensing layer 42 between two plates, and utilizes a cementing layer 6 that the superimposed gluing of two plates is become a plate body; Itself and the main difference of aforementioned first embodiment are the setting of this capacitive sensing layer 42, wherein, this capacitive sensing layer 42 is located at the upper surface of substrate 4, and this capacitive sensing layer 42 is the transparent conductive film of a tin indium oxide material, it contains the sensing unit 42a of most areas slightly triangular in shape, and make between the described sensing unit 42a each other with equidistant and staggered layout (shown in the 4th figure), then with the electric respectively metal guide passage 42b that is located at these substrate 4 edges that is connected to of the ora terminalis of each sensing unit 42a, and be connected to signal output end (not being shown in drawing), make the sensor signal of each sensing unit 42a be sent to a follow-up signal processing circuit in view of the above via this signal output end; In addition, also fill out in the gap being provided with of aforementioned sensing unit 42a and to be provided with imitative decoration road 49, and should imitative decoration road 49 keep a 49a and not being connected at interval with the edge of two adjacent sensing unit 42a respectively, usually make this interval 49a be about 20 μ m-50 μ m, and in ideal, should imitative decoration road 49 be to have identical material with described sensing unit 42a, that is the transparent conductive film of tin indium oxide material, thereby make this capacitive sensing layer 42 have the comparatively transmittance of homogeneous, promote the transmittance uniformity coefficient of promoting appearance flatness and Trackpad according to this, improve the disappearance of the fuzzy distortion of video picture.
The utility model is not limited to the above form; clearly with reference to after the above-mentioned explanation; the improvement and the variation of more technology isotropisms can be arranged; this for example is: when this imitative decoration road is used in existing capacitance sensing structure; because of its X-axis stitching is located on two different capacitive sensing layers out of the ordinary by branch with the X-axis stitching; and between two capacitive sensing layers by the insulation course separation of being insulated; so should imitate the peripheral part that the decoration road selectively is laid in the sensing unit of arbitrary X-axis stitching or Y-axis stitching; also can will should imitative decoration road be laid on this insulation course and corresponding to the position of X-axis sensing unit and Y-axis sensing unit combinational gap; and these changes are provided with equal can reaching and the same or similar usefulness of previous embodiment, so should be identical with the true matter of the utility model aforementioned techniques.So, all have in that identical creation spirit is following do relevant any modification of the present utility model or change, all must be included in the category of the utility model intention protection.
Claims (10)
1. Trackpad capacitance sensing structure-improved, it has transparent X-axis induction stitching of plural number and Y-axis induction stitching, at X, be respectively equipped with the capacitive sensing unit that majority is connected to each other on the Y-axis stitching, described X-axis stitching and described Y-axis stitching are interlaced with each other and insulation is provided with, make X, each capacitive sensing unit on the Y-axis stitching is rectangular arrangement and is laid within the perform region of this Trackpad, it is characterized in that: possess identical transmittance or transmittance difference value on the imitative decoration road below 6% insulation is set in the gap being laid with of described capacitive sensing unit.
2. Trackpad capacitance sensing structure-improved as claimed in claim 1 is characterized in that: this imitative decoration road and this X-axis induction stitching and Y-axis induction stitching are arranged on the same layer plane.
3. Trackpad capacitance sensing structure-improved as claimed in claim 1 is characterized in that: this imitative decoration road and this X-axis induction stitching are arranged on the same layer plane.
4. Trackpad capacitance sensing structure-improved as claimed in claim 1 is characterized in that: this imitative decoration road and this Y-axis induction stitching are arranged on the same layer plane.
5. Trackpad capacitance sensing structure-improved as claimed in claim 1 is characterized in that: this imitative decoration road and this X-axis induction stitching and/or Y-axis induction stitching are arranged on the different layers plane.
6. Trackpad capacitance sensing structure-improved as claimed in claim 1 is characterized in that: this imitative decoration road keeps one not to be connected at interval with the edge of this X-axis sensing unit and Y-axis sensing unit respectively.
7. Trackpad capacitance sensing structure-improved as claimed in claim 6 is characterized in that: this interval is approximately less than 50 μ m.
8. Trackpad capacitance sensing structure-improved as claimed in claim 1 is characterized in that: this imitative decoration road, this X-axis induction stitching and Y-axis induction stitching are the transparent conductive film material of identical material.
9. Trackpad capacitance sensing structure-improved, it comprises a substrate and top panel, between two plates, be provided with a capacitive sensing layer, and utilize a cementing layer that the superimposed again gluing of two plates is become a plate body, it is characterized in that: in the perform region of this Trackpad, this capacitive sensing layer contains a plurality of sensing units, make to be equidistant and staggered layout between the described sensing unit each other, and establish insulation is set in the gap filling out of aforementioned sensing unit and to possess identical transmittance or transmittance difference value on the imitative decoration road below 6%.
10. Trackpad capacitance sensing structure-improved as claimed in claim 9 is characterized in that: this sensing unit is a triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920154384 CN201503582U (en) | 2009-05-22 | 2009-05-22 | Improved structure for capacitance sensing for touch pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920154384 CN201503582U (en) | 2009-05-22 | 2009-05-22 | Improved structure for capacitance sensing for touch pad |
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| CN201503582U true CN201503582U (en) | 2010-06-09 |
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| CN 200920154384 Expired - Fee Related CN201503582U (en) | 2009-05-22 | 2009-05-22 | Improved structure for capacitance sensing for touch pad |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275648A (en) * | 2018-03-14 | 2019-09-24 | Bcs汽车接口解决方案有限公司 | Touch sensitive operating element |
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- 2009-05-22 CN CN 200920154384 patent/CN201503582U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275648A (en) * | 2018-03-14 | 2019-09-24 | Bcs汽车接口解决方案有限公司 | Touch sensitive operating element |
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| Date | Code | Title | Description |
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| 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: 20100609 Termination date: 20180522 |
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| CF01 | Termination of patent right due to non-payment of annual fee |