The present invention relates to a skill field of display, and more particularly to a mutual capacitance multi-touch control electrode structure using single layer metal mesh.
Compared with the single touch control panel, the multi-touch control panel which allows two points touch, multiple touch or even multi-person touch operations simultaneously is more convenient and more humanized. Recently, developed single layer multi-touch control panel not only possess merits of general multi-touch control panels but also take great advantage of the light and thin development of touch control electronic product because the thickness is smaller.
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At present, the conducting layer of the touch panel is formed on an isolative substrate mainly with Indium Tin Oxide compound by skills of vacuum coating and pattern etching. The requirements for the skill processes and equipments are higher and tons of Indium Tin Oxide compound is wasted and creates a large amount of industrial wastes including heavy metals; meanwhile, the metal (In) is a rare source which causes higher manufacture cost of the touch control panel. For efficiently reducing the cost of the touch control panel and satisfying the market trend of the light, thin consumer end electronic products, metal mesh touch panel (Metal Mesh TP) has been developed recently. The conducting layer of the sensing layer is to use a metal mesh as being the touch control electrodes to replace the Indium Tin Oxide compound and double layer structure is utilized. One layer is employed to be driving electrodes and the other layer is employed to be sensing electrodes. Mutual capacitances are formed between these two metal mesh layers. Please refer to
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An objective of the present invention is to provide a mutual capacitance multi-touch control electrode structure using single layer metal mesh capable of narrowing blind areas to reduce the linearity fluctuation of the single layer mutual capacitance structure.
For realizing the aforesaid objective, the present invention provides a mutual capacitance multi-touch control electrode structure using single layer metal mesh, comprising: a metal conducting mesh layer; the metal conducting mesh layer comprises a plurality of driving line areas, a plurality of sensing line areas and a plurality of shielding line area; the driving line areas are located at one sides of the shielding line areas, and the sensing line areas are located at the other sides of the shielding line areas; the driving line area, sensing line area and shielding line area respectively comprise a plurality of mesh units, and in each of the areas, the mesh units are mutually electrically connected, and one mesh unit adjacent to another mesh unit in adjacent areas are mutually electrically connected; one mesh unit comprises a plurality of mesh edges and nodes formed by two adjacent and connected mesh edges.
The driving line area comprises: a plurality of first driving electrodes and a plurality of second driving electrodes, and the first driving electrode comprises a plurality of first driving lines, and the second driving electrode comprises a plurality of second driving lines; the sensing line area comprises a plurality of sensing electrodes, and the sensing electrode comprises a plurality of sensing lines; the shielding line area comprises a plurality of shielding lines.
Each of the first driving lines, the second driving lines, the sensing lines and the shielding lines is a group consisting of several mesh edges.
The electrical isolations among the first driving lines, the second driving lines, the sensing lines and the shielding lines are achieved by micro disconnections among the mesh edges.
The distances among the first driving lines, the second driving lines, the sensing lines and the shielding lines which are adjacent are smaller than 100 μm to provide enough meshes for dividing the driving line areas and the sensing line areas and forming the mutual capacitances.
The mutual capacitances are formed between the first driving electrodes and the sensing electrodes.
The mutual capacitances are achieved by comb structures between the first driving electrodes and the sensing electrodes.
An appearance of each of the mesh units is a rhombus.
A thickness of the metal conducting mesh layer is in a scale of 0.1 μm.
The benefits of the present invention are: the present invention provides a mutual capacitance multi-touch control electrode structure using single layer metal mesh. By uniform mesh routing to achieve the consistency of the whole light transmittance of the touch screen and division of the driving line areas and the sensing line areas by subareas of the metal mesh lines. With the more compact metal mesh designed according to the present invention, the routing areas of the driving lines can be made narrower to narrow the blind areas. Accordingly, the linearity fluctuation of the single layer mutual capacitance structure can be reduced.
In order to better understand the characteristics and technical aspect of the invention, please refer to the following detailed description of the present invention is concerned with the diagrams, however, provide reference to the accompanying drawings and description only and is not intended to be limiting of the invention.
The technical solution, as well as beneficial advantages, of the present invention will be apparent from the following detailed description of an embodiment of the present invention, with reference to the attached drawings.
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Embodiments of the present invention are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows.
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the driving line area 1 comprises: a plurality of first driving electrodes 11 and a plurality of second driving electrodes 12, and the first driving electrode 11 comprises a plurality of first driving lines 13, and the second driving electrode 12 comprises a plurality of second driving lines 14; the sensing line area 2 comprises a plurality of sensing electrodes 20, and the sensing electrode 20 comprises a plurality of sensing lines 22; the shielding line area 3 comprises a plurality of shielding lines 30; each of the first driving lines 13, the second driving lines 14, the sensing lines 22 and the shielding lines 30 is a group consisting of several mesh edges; the electrical isolations among the first driving lines 13, the second driving lines 14, the sensing lines 22 and the shielding lines 30 are achieved by micro disconnections among the mesh edges.
In this embodiment, an appearance of each of the mesh units 10 is a rhombus. Other appearances, such as oblong, triangle, hexagon or etc. also can be employed for the mesh units;
in the metal conducting mesh layer, the distances among the first driving lines 13, the second driving lines 14, the sensing lines 22 and the shielding lines 39 which are adjacent have to be smaller (smaller than 100 μm) to provide enough meshes for dividing the driving line areas and the sensing line areas and forming the mutual capacitances.
The mutual capacitances are formed between the first driving electrodes 11 and the sensing electrodes 20.
A thickness of the metal conducting mesh layer is merely required in a scale of 0.1 μm. The enough mutual capacitances between the first driving electrodes 11 and the sensing electrodes 20 can be achieved by a large number of the comb structures because pitches among the adjacent first driving lines 13, the second driving lines 14, the sensing lines 22 and the shielding lines 30 of the metal conducting mesh layer are small. Therefore, the thickness increase of the metal conducting mesh layer is not required for enlarging the mutual capacitances.
Smaller sensor pitch can be achieved as long as the metal mesh lines are concentrated enough. Meanwhile the blind areas can be narrower.
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In conclusion, the present invention provides a mutual capacitance multi-touch control electrode structure using single layer metal mesh. By uniform mesh routing to achieve the consistency of the whole light transmittance of the touch screen and division of the driving line areas and the sensing line areas by subareas of the metal mesh lines. With the more compact metal mesh designed according to the present invention, the routing areas of the driving lines can be made narrower to narrow the blind areas. Accordingly, the linearity fluctuation of the single layer mutual capacitance structure can be reduced.
Above are only specific embodiments of the present invention, the scope of the present invention is not limited to this, and to any persons who are skilled in the art, change or replacement which is easily derived should be covered by the protected scope of the invention. Thus, the protected scope of the invention should go by the subject claims.
Number | Date | Country | Kind |
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201410315426.6 | Jul 2014 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2014/082531 | 7/18/2014 | WO | 00 |