CN201765579U - Projection type capacitive touch screen - Google Patents
Projection type capacitive touch screen Download PDFInfo
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- CN201765579U CN201765579U CN201020290534XU CN201020290534U CN201765579U CN 201765579 U CN201765579 U CN 201765579U CN 201020290534X U CN201020290534X U CN 201020290534XU CN 201020290534 U CN201020290534 U CN 201020290534U CN 201765579 U CN201765579 U CN 201765579U
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Abstract
The utility model discloses a projection type capacitive touch screen which comprises a transparent substrate; a touch sensitive part is arranged on the transparent substrate; and the touch sensitive part comprises a plurality of first sensing electrodes extending along a first direction as well as a plurality of second sensing electrodes extending along a second direction. The projection type capacitive touch screen is characterized in that the outside of the touch sensitive part is provided with a quarter wave plate and a polarization layer; the polarization layer is arranged outside the quarter wave plate; and the included angle between the absorption axis of the polarization layer and the optical axis of the quarter wave plate is 45 degrees. When the projection type capacitive touch screen is in use, incident environmental lights are driven into linearly polarized lights by the polarization layer; while the polarization direction of the polarized lights is rotated by 45 degrees by the quarter wave plate; after the lights pass through each layer of structure behind the quarter wave plate, partially reflected polarized lights are rotated by 45 degrees again by the quarter wave plate with a polarization direction vertical to the direction of the light axis of the polarization layer, can not pass through the polarization layer, and are eliminated, thereby eliminating strength difference of lights reflected by different areas of the touch screen.
Description
Technical field
The utility model relate to be used for man-machine between mutual input media, specifically, relate to a kind of projection-type capacitive touch screen.
Background technology
In recent years, along with the fast development and the application of infotech, radio mobile communication and information household appliances, people grow with each passing day to the dependence of electronic product.In order to reach more convenient, lighter and handyizatioier of volume and more humane purpose, many information products by traditional keyboard or mouse as input media, change into and use touch-screen as input media.Existing touch-screen is broadly divided into types such as condenser type, resistance-type, photosensitizing type and since capacitance touch screen have the reaction time fast, fiduciary level is good and the durability advantages of higher, therefore, capacitance touch screen is widely used in electronic product.
In the capacitance touch screen, projection-type capacitive touch screen can be realized multiple spot and coordinate induction accurately, and simple in structure, transmittance is high, is the main flow direction of current demonstration touch technology development.The touch sensible parts of projection-type capacitive touch screen comprise a plurality of first sensing electrode and a plurality of second sensing electrodes that extend along second direction that extend along first direction, the interlaced formation induction arrays of first sensing electrode and second sensing electrode; Electrically do not connect mutually between each first sensing electrode, electrically do not connect mutually between each second sensing electrode, electrically be not connected between first sensing electrode and second sensing electrode.When the user contacted touch-screen with finger, first sensing electrode at contact origination point place and the mutual capacitance between second sensing electrode changed, and change by this mutual capacitance of circuit measuring, just can judge to touch to exist, and the coordinate of calculating contact origination point.
Above-mentioned first sensing electrode and second sensing electrode generally all are arranged on on a slice transparency carrier, general one of the following three kinds of film layer structures that adopt of touch sensible parts are realized: (1) single-surface double-layer structure, first sensing electrode of touch sensible parts and second sensing electrode are separately positioned on first conducting film and second conducting film, first conducting film and second conducting film are positioned at the same one side (can be the lateral surface or the medial surface of transparency carrier) of transparency carrier, and between first conducting film and second conducting film, be provided with insulation course, to prevent first sensing electrode and the second sensing electrode short circuit; (2) bilateral structure, first sensing electrode of touch sensible parts and second sensing electrode are separately positioned on first conducting film and second conducting film, first conducting film and the second conducting film branch are on the two sides of transparency carrier, thereby by transparency carrier first sensing electrode and second sensing electrode are separated naturally; (3) single-surface single-layer structure, first sensing electrode of touch sensible parts and second sensing electrode all are set in place in transparency carrier and simultaneously go up on the same conducting film of (lateral surface or the medial surface that can be transparency carrier), and guarantee its conducting on direction separately by certain bridge formation structure at the cross-point place.
No matter first sensing electrode and second sensing electrode adopt above-mentioned which kind of film layer structure, its figure generally all designs in such a way: first sensing electrode, second sensing electrode all is formed by connecting by a plurality of electrode blocks respectively, and the electrode block of the electrode block of first sensing electrode and second sensing electrode surrounds mutually, formation is similar to the figure of chess chessboard, make the electrode block of each first sensing electrode all be surrounded by the electrode block of four second sensing electrodes, equally, the electrode block of each second sensing electrode all is surrounded by the electrode block of four first sensing electrodes.This mode guarantees that the electrode block of each first sensing electrode can form mutual capacitance with second sensing electrode on four direction, and the electrode block of each second sensing electrode also can form mutual capacitance with first sensing electrode on four direction.Above-mentioned electrode block generally all is designed to the above yardstick of millimeter.
Generally, in order to improve the sensitivity of touch, also need keep the interval of certain width between first sensing electrode and second sensing electrode, its width is generally greater than 30 μ m.
According to above-mentioned graphic designs, first sensing electrode and second sensing electrode are not overlapping in the zone except cross-point, thereby, for single-surface double-layer structure and bilateral structure, in these zones or have only first conducting film, or have only second conducting film.And at the interval region of first sensing electrode and second sensing electrode, no matter single-surface double-layer structure, bilateral structure still are the single-surface single-layer structure, all do not have conducting film.Therefore, in the zones of different of a slice projection-type capacitive touch screen, there is different rete combinations.
The material of above-mentioned first sensing electrode and second sensing electrode is the printing opacity conductive material, and as indium tin oxide (ITO), its refractive index is generally greater than 1.9.And the material of insulation course adopts organic resin, and the material of transparency carrier adopts glass usually, and the refractive index of these two kinds of materials all is 1.4～1.6.
When surround lighting incident, because there is difference in the refractive index of different materials, light all can reflect at each interface.Because there is different rete combinations in zones of different, thereby has different rete interface conditions, the difference of rete interface conditions causes easily by the difference of the observed intensity of reflected light of naked eyes.
On the other hand, when incident ray passes conducting film, boundary reflection can take place on two surfaces of conducting film and produce to interfere, cause the final interference color that occur by conducting film thickness and refractive index decision of reflected light, interference color are very easy to arrive for naked eyes are observed.
First conducting film of single-surface double-layer structure and bilateral structure projection-type capacitive touch screen, the not only residing rete of second conducting film position, interface conditions are different, and need to form by twice film-forming process respectively, thereby occur easily because the refractive index that the process conditions difference causes and/or the difference of thickness; According to above-mentioned reflection and principle of interference, this interface conditions is inconsistent, and the difference of refractive index and/or thickness, the difference that can cause its intensity of reflected light and interference color, because electrode block has the above yardstick of millimeter, thereby inconsistent being easy to of this intensity of reflected light and interference color perceiveed by naked eyes, makes to be it seems that by naked eyes touch-screen presents by two kinds of brightness, catoptrical alternate chess checkerboard reflective appearance that forms of color.In the single-surface single-layer structure projection-type capacitive touch screen, because first sensing electrode and second sensing electrode are in same conducting film, so there are not the problems referred to above, but, interval at adjacent sensing electrode, still can observe by the interval region between the sensing electrode owing to lack the reflected light difference in brightness that conducting film causes, therefore, still can observe the profile of sensing electrode.
In addition, when touch-screen used under the bright ring border, the rete boundary reflection light in the touch-screen all can disturb user's watching the display frame that sees through touch-screen.
At present, at single-surface double-layer structure and bilateral structure projection-type capacitive touch screen, someone proposes the method for the inconsistency of a kind of intensity of reflected light that weakens and interference color, the scheme that adopts is on the basis of single-surface double-layer structure or bilateral structure projection-type capacitive touch screen, the sensing electrode of the correspondence position setting of each sensing electrode and another one direction altogether the filling electrode of layer (that is to say, on the conducting film at the first sensing electrode place, the position corresponding with each second sensing electrode is provided with the filling electrode; Equally, on the conducting film at the second sensing electrode place, the position corresponding with each first sensing electrode also is provided with fills electrode), make all sensing electrode zones all have two electrode aspects, reach the consistance of all sensing electrode regional level structures, thereby can reach the inconsistent purpose of eliminating intensity of reflected light and interference color.But this method has increased the aspect of electrode, can cause catoptrical increase, can make that equally also the electrode profile is more obvious, thereby can not improve the appearance characteristics of touch-screen up hill and dale.
Generally speaking, above-mentioned various projection-type capacitive touch screen is because of surround lighting incident, its zones of different will produce the difference of the intensity of reflected light that the sensing electrode by patterning causes, so that when the user watches touch-screen, electrode shadow (being the shape and the profile of electrode) appears in the surface of touch-screen, and the display effect of touch-screen and vision homogeneity are not good enough.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of projection-type capacitive touch screen, this projection-type capacitive touch screen can effectively be eliminated the reflected light by the surround lighting generation of incident, thereby eliminate the electrode shadow on projection-type capacitive touch screen surface, have preferable display effect and vision homogeneity.The technical scheme that adopts is as follows:
A kind of projection-type capacitive touch screen, comprise transparency carrier, transparency carrier is provided with the touch sensible parts, the touch sensible parts comprise a plurality of first sensing electrode and a plurality of second sensing electrodes that extend along second direction that extend along first direction, the interlaced formation induction arrays of first sensing electrode and second sensing electrode, electrically do not connect mutually between each first sensing electrode, electrically do not connect mutually between each second sensing electrode, electrically be not connected between first sensing electrode and second sensing electrode, it is characterized in that: the arranged outside of described touch sensible parts has quarter-wave plate and polarizing layer, polarizing layer is in the outside of quarter-wave plate, and the angle between the optical axis of the absorption axes of polarizing layer and quarter-wave plate is 45 °.
In a kind of concrete scheme, the polaroid that has polarizing layer and quarter-wave plate (can be that is to say, the polaroid that adopts contains polarizing layer and this double-layer structure of quarter-wave plate) be attached at the above-mentioned outside that is provided with the transparency carrier of touch sensible parts, form the projection-type capacitive touch screen of said structure.Above-mentioned quarter-wave plate and polarizing layer also can be two separate parts, are attached at the above-mentioned outside that is provided with the transparency carrier of touch sensible parts successively.
Usually, be provided with overlay in the outside of transparency carrier and touch sensible parts, make when touch-screen uses, isolated by overlay between touch sensible parts and the touch body, overlay plays the capacitive buffer action; In addition, overlay also has protective effect and coverage effect.Be provided with under the situation of overlay, can adopt following manner that polarizing layer and quarter-wave plate are set: (1) polarizing layer and quarter-wave plate all are attached on the medial surface of overlay, perhaps polarizing layer and quarter-wave plate all are attached on the lateral surface of overlay, during actual the manufacturing, can adopt the polaroid that has polarizing layer and quarter-wave plate to be attached on the medial surface or lateral surface of overlay; Or (2) be attached to the lateral surface of overlay with polarizing layer, and quarter-wave plate is attached on the medial surface of overlay; Or (3) employing spread glass making overlay, overlay double as polarizing layer, and quarter-wave plate is attached at the inboard of overlay.
Before above-mentioned projection-type capacitive touch screen is arranged on the picture of display, constitute the demonstration touch-control system, show the demonstration touch control manner that cooperatively interacts with touch sensible, have extremely strong interactivity by picture.
The combination of projection-type capacitive touch screen and display can be adopted plug-in mode, that is to say, projection-type capacitive touch screen and display are separate devices, and just simply projection-type capacitive touch screen are fixed on display the place ahead, form touch control display system.
The combination of projection-type capacitive touch screen and display also can be adopted embedded mode, projection-type capacitive touch screen is combined in the display, form the touch control display system of " embedded ", it is embedded touch control display device, its basic structural feature is the transparency carrier in the outermost layer substrate double as projection-type capacitive touch screen of employing display.Position in the projection-type capacitive touch screen between the outermost layer substrate of touch sensible parts, polarizing layer, quarter-wave plate and display relation then can design with reference to the position relation between touch sensible parts, polarizing layer, quarter-wave plate and the transparency carrier in the projection-type capacitive touch screen independently.
The utility model is disposed with quarter-wave plate and polarizing layer from inside to outside in the outside of touch sensible parts, after ambient light incident, polarizing layer at first makes and is incident on the ambient light polarization on the projection-type capacitive touch screen and forms linearly polarized light, and quarter-wave plate is with 45 ° of the polarization direction rotations of linearly polarized light; Light is after passing through each layer structure of quarter-wave plate rear side, part is reflected, this part polarized light that reflects back is once more by behind the quarter-wave plate, be further rotated 45 °, thereby make the optical axis direction of the polarization direction of reflection ray perpendicular to polarizing layer, can not pass through polarizing layer, therefore, the reflected light of each bed interface of touch-screen is eliminated basically, the reflected light that promptly incides the surround lighting generation of projection-type capacitive touch screen is eliminated, thereby eliminated the difference of projection-type capacitive touch screen zones of different intensity of reflected light, and then eliminate the electrode shadow on projection-type capacitive touch screen surface, make projection-type capacitive touch screen have preferable display effect and vision homogeneity.
Description of drawings
Fig. 1 is the structural representation of the utility model preferred embodiment 1;
Fig. 2 is the structural representation of the utility model preferred embodiment 2;
Fig. 3 is the structural representation of the utility model preferred embodiment 3;
Fig. 4 is the structural representation of the utility model preferred embodiment 4;
Fig. 5 is the structural representation of the utility model preferred embodiment 5;
Fig. 6 is the structural representation of the utility model preferred embodiment 6.
Embodiment
Embodiment 1
As shown in Figure 1, this projection-type capacitive touch screen comprises transparency carrier 11, transparency carrier 11 is provided with the touch sensible parts, the touch sensible parts comprise a plurality of first sensing electrode 12 and a plurality of second sensing electrodes 13 that extend along second direction that extend along first direction, first sensing electrode 12 and second sensing electrode, 13 interlaced formation induction arrays, electrically do not connect mutually between each first sensing electrode 12, electrically do not connect mutually between each second sensing electrode 13, electrically be not connected between first sensing electrode 12 and second sensing electrode 13.The touch sensible parts of the projection-type capacitive touch screen of present embodiment are the single-surface double-layer structure, that is to say, first sensing electrode 12 of touch sensible parts and second sensing electrode 13 are separately positioned on first conducting film and second conducting film, first conducting film and second conducting film are positioned at the medial surface of transparency carrier 11, second conducting film is in the first conducting film inboard, and is provided with insulation course 14 between first conducting film and second conducting film.The second conducting film inboard is attached with second insulation course 15.
In the present embodiment, be pasted with polaroid 16 on the lateral surface of transparency carrier 11 (obviously, polaroid 16 is in the outside of touch sensible parts), polaroid 16 contains quarter-wave plate 17 and polarizing layer 18, polarizing layer 18 is in the outside of quarter-wave plate 17, and the angle between the optical axis of the absorption axes of polarizing layer 18 and quarter-wave plate 17 is 45 °.
Another kind of touch sensible parts are in the projection-type capacitive touch screen of single-surface double-layer structure, first sensing electrode of touch sensible parts and second sensing electrode are separately positioned on first conducting film and second conducting film, first conducting film and second conducting film are positioned at the lateral surface of transparency carrier, second conducting film is in first conducting film outside, and is provided with insulation course between first conducting film and second conducting film; Second conducting film outside is attached with second insulation course; The outside of second insulation course is pasted with polaroid, and polaroid contains quarter-wave plate and polarizing layer, and polarizing layer is in the outside of quarter-wave plate, and the angle between the optical axis of the absorption axes of polarizing layer and quarter-wave plate is 45 °.
Embodiment 2
As shown in Figure 2, the touch sensible parts of this projection-type capacitive touch screen are bilateral structure, first sensing electrode 22 of touch sensible parts and second sensing electrode 23 are separately positioned on first conducting film and second conducting film that (the touch sensible parts comprise a plurality of first sensing electrode 22 and a plurality of second sensing electrodes 23 that extend along second direction that extend along first direction, first sensing electrode 22 and second sensing electrode, 23 interlaced formation induction arrays, electrically do not connect mutually between each first sensing electrode 22, electrically do not connect mutually between each second sensing electrode 23, electrically be not connected between first sensing electrode 22 and second sensing electrode 23), first conducting film is on the medial surface of transparency carrier 21, and second conducting film is on the lateral surface of transparency carrier 21; The outside that the inboard of first conducting film is attached with insulation course 24, the second conducting films is attached with second insulation course 25; The outside of second insulation course 25 is pasted with polaroid 26, polaroid 26 contains quarter-wave plate 27 and polarizing layer 28, polarizing layer 28 is in the outside of quarter-wave plate 27, and the angle between the optical axis of the absorption axes of polarizing layer 28 and quarter-wave plate 27 is 45 °.
Embodiment 3
As shown in Figure 3, the touch sensible parts of this projection-type capacitive touch screen are the single-surface single-layer structure, first sensing electrode 32 and second sensing electrode 33 of touch sensible parts all are set in place on the same conducting film on transparency carrier 31 medial surfaces, and guarantee its conducting on direction separately by certain bridge formation structure at the cross-point place; The inboard of whole touch sensible parts is coated with insulation course 35; Be pasted with polaroid 36 on the lateral surface of transparency carrier 31 (obviously, polaroid 36 is in the outside of touch sensible parts), polaroid 36 contains quarter-wave plate 37 and polarizing layer 38, polarizing layer 38 is in the outside of quarter-wave plate 37, and the angle between the optical axis of the absorption axes of polarizing layer 38 and quarter-wave plate 37 is 45 °.At the cross-point of first sensing electrode 32 and second sensing electrode 33 by certain bridge formation structure, first sensing electrode 32 and second sensing electrode 33 are separated and guarantee its conducting on direction separately, its characteristics are: first sensing electrode 32 is provided with on conducting film continuously; Second sensing electrode 33 serves as to be divided at interval some electrode blocks 34 with first sensing electrode 32 on conducting film; On cross-point, by conducting bridge 39 adjacent two electrode blocks 34 in second sensing electrode 33 are connected, form the second continuous sensing electrode 33, and separate by insulation pad 310 between the conducting bridge 39 and first sensing electrode 32.
Another kind of touch sensible parts are in the projection-type capacitive touch screen of single-surface single-layer structure, first sensing electrode of touch sensible parts and second sensing electrode all are set in place on the same conducting film on the transparency carrier lateral surface, and guarantee its conducting on direction separately by certain bridge formation structure at the cross-point place; The outer side covers of whole touch sensible parts has insulation course; The outside of insulation course is pasted with polaroid, and polaroid contains quarter-wave plate and polarizing layer, and polarizing layer is in the outside of quarter-wave plate, and the angle between the optical axis of the absorption axes of polarizing layer and quarter-wave plate is 45 °.
Embodiment 4
As shown in Figure 4, this projection-type capacitive touch screen comprises transparency carrier 41, transparency carrier 41 is provided with the touch sensible parts, the touch sensible parts comprise a plurality of first sensing electrode 42 and a plurality of second sensing electrodes 43 that extend along second direction that extend along first direction, first sensing electrode 42 and second sensing electrode, 43 interlaced formation induction arrays, electrically do not connect mutually between each first sensing electrode 42, electrically do not connect mutually between each second sensing electrode 43, electrically be not connected between first sensing electrode 42 and second sensing electrode 43.
The outside at transparency carrier 41 and touch sensible parts is provided with overlay 44, the inboard of overlay 44 is pasted with polaroid 45 (obviously, polaroid 45 is in the outside of touch sensible parts), polaroid 45 contains quarter-wave plate 46 and polarizing layer 47, polarizing layer 47 is in the outside of quarter-wave plate 46, and the angle between the optical axis of the absorption axes of polarizing layer 47 and quarter-wave plate 46 is 45 °.
The touch sensible parts of projection-type capacitive touch screen shown in Figure 4 are the single-surface double-layer structure, first sensing electrode 42 of touch sensible parts and second sensing electrode 43 are separately positioned on first conducting film and second conducting film, the conducting film and second conducting film are positioned at the medial surface of transparency carrier 41, second conducting film is in the first conducting film inboard, and is provided with insulation course 48 between first conducting film and second conducting film; The second conducting film inboard is attached with second insulation course 49.
Polaroid 45 is connected with the lateral surface of transparency carrier 41 by tack coat 410.
In addition, be provided with overlay in the outside of transparency carrier and touch sensible parts, the inboard of overlay is pasted with under the situation of the polaroid that contains quarter-wave plate and polarizing layer, and the touch sensible parts also can adopt single-surface single-layer structure or bilateral structure.
Embodiment 5
As shown in Figure 5, this projection-type capacitive touch screen comprises transparency carrier 51, transparency carrier 51 is provided with the touch sensible parts, the touch sensible parts comprise a plurality of first sensing electrode 52 and a plurality of second sensing electrodes 53 that extend along second direction that extend along first direction, first sensing electrode 52 and second sensing electrode, 53 interlaced formation induction arrays, electrically do not connect mutually between each first sensing electrode 52, electrically do not connect mutually between each second sensing electrode 53, electrically be not connected between first sensing electrode 52 and second sensing electrode 53.
The outside at transparency carrier 51 and touch sensible parts is provided with overlay 54, the lateral surface of overlay 54 is pasted with polarizing layer 55, be pasted with quarter-wave plate 56 on the medial surface of overlay 54, the angle between the optical axis of the absorption axes of polarizing layer 55 and quarter-wave plate 56 is 45 °.
The touch sensible parts of projection-type capacitive touch screen shown in Figure 5 are bilateral structure, first sensing electrode 52 of touch sensible parts and second sensing electrode 53 are separately positioned on first conducting film and second conducting film, first conducting film is on the medial surface of transparency carrier 51, and second conducting film is on the lateral surface of transparency carrier 51; The outside that the inboard of first conducting film is attached with insulation course 57, the second conducting films is attached with second insulation course 58.
Quarter-wave plate 56 is connected with second insulation course 58 by tack coat 59.
In addition, be provided with overlay in the outside of transparency carrier and touch sensible parts, the lateral surface of overlay is pasted with under the situation that is pasted with quarter-wave plate on polarizing layer, the medial surface, and the touch sensible parts also can adopt single-surface single-layer structure or single-surface double-layer structure.
Embodiment 6
As shown in Figure 6, this projection-type capacitive touch screen comprises transparency carrier 61, transparency carrier 61 is provided with the touch sensible parts, the touch sensible parts comprise a plurality of first sensing electrode 62 and a plurality of second sensing electrodes 63 that extend along second direction that extend along first direction, first sensing electrode 62 and second sensing electrode, 63 interlaced formation induction arrays, electrically do not connect mutually between each first sensing electrode 62, electrically do not connect mutually between each second sensing electrode 63, electrically be not connected between first sensing electrode 62 and second sensing electrode 63.
The outside at transparency carrier 61 and touch sensible parts is provided with overlay 64, the outside of overlay 64 is pasted with polaroid 65 (obviously, polaroid 65 is in the outside of touch sensible parts), polaroid 65 contains quarter-wave plate 66 and polarizing layer 67, polarizing layer 67 is in the outside of quarter-wave plate 66, and the angle between the optical axis of the absorption axes of polarizing layer 67 and quarter-wave plate 66 is 45 °.
The touch sensible parts of projection-type capacitive touch screen shown in Figure 6 are the single-surface single-layer structure, first sensing electrode 62 of touch sensible parts and second sensing electrode 63 all are set in place on the same conducting film on transparency carrier 61 medial surfaces, and guarantee its conducting on direction separately by certain bridge formation structure (but bridge formation structure reference example 3 comprises conducting bridge 68 and insulation pad 69) at the cross-point place.The inboard of whole touch sensible parts is coated with insulation course 611.
In addition, be provided with overlay in the outside of transparency carrier and touch sensible parts, the outside of overlay is pasted with under the situation of the polaroid that contains quarter-wave plate and polarizing layer, and the touch sensible parts also can adopt single-surface double-layer structure or bilateral structure.
In other embodiments, be provided with under the situation of overlay, also can adopt spread glass to make overlay in the outside of transparency carrier and touch sensible parts, overlay double as polarizing layer, and quarter-wave plate is attached at the inboard of overlay.
Claims (7)
1. projection-type capacitive touch screen, comprise transparency carrier, transparency carrier is provided with the touch sensible parts, the touch sensible parts comprise a plurality of first sensing electrode and a plurality of second sensing electrodes that extend along second direction that extend along first direction, the interlaced formation induction arrays of first sensing electrode and second sensing electrode, electrically do not connect mutually between each first sensing electrode, electrically do not connect mutually between each second sensing electrode, electrically be not connected between first sensing electrode and second sensing electrode, it is characterized in that: the arranged outside of described touch sensible parts has quarter-wave plate and polarizing layer, polarizing layer is in the outside of quarter-wave plate, and the angle between the optical axis of the absorption axes of polarizing layer and quarter-wave plate is 45 °.
2. projection-type capacitive touch screen according to claim 1 is characterized in that: the outside of described transparency carrier and touch sensible parts is provided with overlay, and polarizing layer and quarter-wave plate all are attached on the medial surface of overlay.
3. projection-type capacitive touch screen according to claim 1 is characterized in that: the outside of described transparency carrier and touch sensible parts is provided with overlay, and polarizing layer and quarter-wave plate all are attached on the lateral surface of overlay.
4. projection-type capacitive touch screen according to claim 1 is characterized in that: the outside of described transparency carrier and touch sensible parts is provided with overlay, and polarizing layer is attached on the lateral surface of overlay, and quarter-wave plate is attached on the medial surface of overlay.
5. projection-type capacitive touch screen according to claim 1, it is characterized in that: first sensing electrode of described touch sensible parts and second sensing electrode are separately positioned on first conducting film and second conducting film, first conducting film and second conducting film are positioned at the medial surface of transparency carrier, second conducting film is in the first conducting film inboard, and is provided with insulation course between first conducting film and second conducting film; Polarizing layer and quarter-wave plate all are attached on the lateral surface of transparency carrier.
6. projection-type capacitive touch screen according to claim 1 is characterized in that: described first conducting film is on the medial surface of transparency carrier, and second conducting film is on the lateral surface of transparency carrier; The inboard of first conducting film is attached with insulation course, and the outside of second conducting film is attached with second insulation course; Polarizing layer and quarter-wave plate all are attached at the outside of second insulation course.
7. projection-type capacitive touch screen according to claim 1, it is characterized in that: first sensing electrode of described touch sensible parts and second sensing electrode all are set in place on the same conducting film on the transparency carrier medial surface, first sensing electrode is provided with on conducting film continuously, and second sensing electrode serves as to be divided into some electrode blocks at interval with first sensing electrode on conducting film; On the cross-point of first sensing electrode and second sensing electrode, by conducting bridge adjacent two electrode blocks in second sensing electrode are connected, form the second continuous sensing electrode, and separate by the insulation pad between the conducting bridge and first sensing electrode; The inboard of touch sensible parts is coated with insulation course; Polarizing layer and quarter-wave plate all are attached on the lateral surface of transparency carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020290534XU CN201765579U (en) | 2010-08-07 | 2010-08-07 | Projection type capacitive touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020290534XU CN201765579U (en) | 2010-08-07 | 2010-08-07 | Projection type capacitive touch screen |
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| Publication Number | Publication Date |
|---|---|
| CN201765579U true CN201765579U (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020290534XU Expired - Lifetime CN201765579U (en) | 2010-08-07 | 2010-08-07 | Projection type capacitive touch screen |
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| CN (1) | CN201765579U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916154A (en) * | 2010-08-07 | 2010-12-15 | 汕头超声显示器（二厂）有限公司 | Projection-type capacitive touch screen |
-
2010
- 2010-08-07 CN CN201020290534XU patent/CN201765579U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916154A (en) * | 2010-08-07 | 2010-12-15 | 汕头超声显示器（二厂）有限公司 | Projection-type capacitive touch screen |
| CN101916154B (en) * | 2010-08-07 | 2012-09-05 | 汕头超声显示器（二厂）有限公司 | Projection-type capacitive touch screen |
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Granted publication date: 20110316 Effective date of abandoning: 20120905 |