TWI525502B - Touch panel - Google Patents

Description

Touch panel

The present invention relates to the field of touch technologies, particularly touch panels.

With the rapid development of technology, touch panels have been widely used in various technology products, such as smart phones, cash machines, and so on. At present, many manufacturers and their downstream industries have successively invested in touch panels and related industries, bringing a new wave of economic development. From this point of view, the importance of the production and application of touch panels can be seen.

Please refer to the first figure. The first figure is a schematic structural diagram of a conventional touch panel. As shown in the figure, the conventional touch panel 9 includes a substrate 90; a transparent conductive layer 91 is formed on the surface 901 of the substrate 90; and a plurality of metal wires 95 are electrically connected to the transparent conductive layer 91. The transparent conductive layer 91 is formed on the surface 901 of the substrate 90 by sputtering using Indium tin oxide (ITO) as a material, and then is cleaned, coated with a photoresist layer, exposed, and developed by a photolithography process. The process of etching and filming forms a circuit pattern, and finally the metal wires 95 are printed on the edge of the transparent conductive layer 91 by screen printing techniques. The formation process of the above structure will result in complicated and low efficiency of the touch panel manufacturing process, and it takes more time and money for the industry to invest in related industries.

In view of the above problems in the prior art, the present invention provides a touch panel. a first transparent substrate having a first surface; and a first conductive structure formed on the first surface; wherein the first conductive structure is made of silver and the first conductive structure comprises a plurality of spaces Arranging first conductive units, each of the first conductive units includes a first electrode axis extending in a first direction and a first wire connected to one end of the first electrode axis in a first direction, wherein the first wire The electrode shaft is formed by a grid of interconnected electrode conductive lines.

Further, an area ratio of an area of the electrode conductive line to the first electrode axis in the first electrode axis is 1:100.

Further, the line width of the electrode conductive line is 5 um.

Further, the first wire extends in the first direction.

Further, the touch panel further includes a cover plate divided into a visible area and a non-visible area adjacent to the visible area; and a first transparent insulating adhesive that fits the cover and the first transparent substrate, the first The electrode shaft is located in the visible area, the first wire is located in the non-visible area, and the first surface is facing or facing away from the cover.

Further, the touch panel further includes a second transparent substrate having a second surface, a second conductive structure, the second conductive structure is formed on the second surface, and the second conductive structure includes a plurality of mutually insulated first a second conductive unit, wherein the second conductive structure is made of silver, and each of the second conductive units includes a second electrode axis extending in the second direction and a second electrode axis connected to the second electrode axis a second wire, wherein the second electrode axis is formed by a grid of interconnected electrode conductive lines, the first direction intersects the second direction; and a first transparent insulating glue is attached to the cover plate and the first transparent substrate, The first electrode axis is located in the visible area, the first wire is located in the non-visible area, and the first surface is facing or facing away from the cover.

Further, the touch panel further includes a light shielding layer, which is not visible in the cover The area covers the non-visible area. The touch panel further includes a transparent conductive layer formed on a surface of the cover plate facing the first transparent substrate and located at least in a visible area of the cover plate, the transparent conductive layer comprising a plurality of extending along the second direction a transparent electrode shaft, wherein the transparent electrode axes are electrically insulated from each other and the first direction is perpendicular to the second direction; and a wire group is formed on a surface of the light shielding layer facing the first transparent substrate, and the wire group is The transparent conductive layer is electrically connected.

Further, the light shielding layer is formed on a surface of the cover plate facing the first transparent substrate, and the transparent conductive layer covers a portion of the light shielding layer.

Further, the light shielding layer partially covers the transparent conductive layer, wherein the light shielding layer penetrates the transparent conductive layer to form a plurality of via holes, and each of the via holes is filled with a conductive block, and the wire group passes through the conductive via hole. The conductive block is electrically connected to the transparent conductive layer. The color of the conductive block is the same as or similar to the color of the light shielding layer.

The touch panel provided by the present invention can be patterned into the first conductive structure by the same procedure, and the first conductive structure of the present invention can be electrically connected without a separate design, thereby improving the efficiency of the touch panel process. .

The foregoing aspects and other aspects of the present invention will be apparent from the following detailed description of the accompanying drawings.

1‧‧‧ touch panel

10‧‧‧First transparent substrate

11‧‧‧First conductive structure

101‧‧‧ first surface

110‧‧‧First Conductive Unit

111‧‧‧First electrode shaft

112‧‧‧First wire

1111‧‧‧Electrode conductive wire

20‧‧‧Second transparent substrate

21‧‧‧Second conductive structure

201‧‧‧ second surface

210‧‧‧Second conductive unit

211‧‧‧Second electrode shaft

212‧‧‧Second wire

30‧‧‧ Cover

31‧‧‧Lighting layer

32‧‧‧Transparent conductive layer

33‧‧‧Wire set

311‧‧‧through holes

40‧‧‧First transparent insulating adhesive

50‧‧‧Second transparent insulating rubber

9‧‧‧Touch panel

90‧‧‧Substrate

91‧‧‧Transparent conductive layer

901‧‧‧ surface

95‧‧‧Metal wire

A‧‧‧visible area

B‧‧‧Invisible area

X‧‧‧ first direction

Y‧‧‧second direction

The first figure is a schematic structural view of a conventional touch panel.

The second figure is a schematic structural view of a first embodiment of the touch panel of the present invention.

The third figure is a top view of the second figure.

The fourth figure is an enlarged view of I in the third figure.

The fifth figure is a schematic view of a second embodiment of the touch panel of the present invention.

The sixth figure is a schematic view of the fifth view along the II-II direction.

The seventh figure is a schematic view of a third embodiment of the touch panel of the present invention.

The eighth figure is a schematic view of the second conductive structure in the seventh figure.

The ninth drawing is a schematic view of a fourth embodiment of the touch panel of the present invention.

Figure 11 is a schematic view showing a fifth embodiment of the touch panel of the present invention.

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments. Hereinafter, a touch panel according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein like elements will be described with the same reference numerals.

Please refer to the second to fourth figures. The second figure shows the structure of the first embodiment of the touch panel of the present invention; the third figure shows the top view of the second figure; the fourth figure shows the third figure of the third figure. Enlarged image. As shown in the figure, a touch panel 1 of the present invention comprises: a first transparent substrate 10 having a first surface 101; and a first conductive structure 11 formed on the first surface 101, the first conductive structure 11 The material is silver.

The first transparent substrate 10 is a flexible substrate or an inflexible substrate formed of an insulating material, such as glass, polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), or polycarbonate. (PC), etc. In the present invention, the first transparent substrate 10 is a polyethylene terephthalate (PET) substrate. The material of the substrate 10 is not limited herein. Where the first surface 101 is used to form the first conductive structure 11 on the first surface 101, which belongs to the first transparent substrate 10 of the touch panel 1 of the present invention, the technical field of the present invention should be Understand, and according to their own needs, select the first transparent substrate 10 of different materials, so I will not repeat them here.

The first conductive structure 11 includes a plurality of first conductive cells 110 arranged at intervals, and the adjacent first conductive cells 110 are insulated from each other. Each of the first conductive units 110 includes a first electrode shaft 111 and a first conductive line 112 electrically connected to a first electrode shaft 111. The first conductive line 112 is configured to transmit a signal in the first electrode shaft 111. The first electrode axis 111 is aligned along the first direction X and the first wire 112 is located at one end of the first electrode axis 111 along the first direction X.

The first electrode axis 111 is formed by a grid of interconnected electrode conductive lines 1111. The grid of electrode conductive lines 1111 may be a regular or irregular network. In this embodiment, the grid of electrode conductive lines 1111 is a regular grid. However, in other embodiments, the grid of the electrode conductive lines 1111 is an irregular network, and the irregular network can eliminate the moire fringes and improve the customer experience, and the invention is not limited thereto. Wherein, in order to make the first electrode shaft 111 invisible to the naked eye, the electrode conductive line 1111 has a width ranging from 5 to 7 μm, preferably any line width of 5 μm, 6 μm or 7 μm. And the area ratio of the area of the electrode conductive line 1111 in the first electrode shaft 111 to the first electrode axis 111 is 1:100.

The first conductive structure 11 is made of silver. In a practical application, the first conductive structure 11 is formed by first disposing a derivative of silver on the first surface 101 of the first transparent substrate 10 by printing or coating, and then passing the derivative of silver through the mask. The exposure process then turns the silver ions of the unexposed portion of the first conductive structure 11 into silver with a developing liquid. Finally, the unexposed portion of the first conductive structure 11 is rinsed with warm water. Thereby, unnecessary portions in the first conductive structure 11 are removed to form the patterned first conductive structure 11.

Please refer to the first figure. Compared with the conventional touch panel 9, if a pattern (not shown) is formed on the transparent conductive layer 91, an etching process is first performed on the transparent conductive layer 91, and then, In addition, a metal wire 95 is designed to electrically connect the transparent conductive layer 91. However, this The invention only needs to be patterned in the first conductive structure 11 by the same process. The first conductive line 112 is also a part of the first conductive structure 11 and is formed at one time without additional design such as the metal wire 95 to electrically connect the present invention. The first conductive structure 11 can improve the efficiency of the touch panel process. In addition, the material of the first conductive structure 11 is silver with good ductility, and when the first conductive structure 11 is wound, cut or bonded on the flexible first transparent substrate 10, it is not easy to be broken. Improve the reliability of the touch panel.

Referring to the fifth and sixth figures, the fifth figure shows a schematic view of the second embodiment of the touch panel of the present invention; and the sixth figure shows a side view of the fifth figure along the II-II direction. The touch panel provided by the second embodiment further includes a cover 30, a light shielding layer 31 and a first transparent insulating adhesive 40.

The cover 30 is made of a transparent material such as glass, and is divided into a visible area A and a non-visible area B. The viewable area A is located at the center of the cover 30 so that the user can view the image from the area. The non-visible area B is located at the peripheral position of the cover 30, which is adjacent to the visible area A and belongs to the outer frame portion where the image frame is not displayed. The light shielding layer 31 is made of a material that blocks light penetration such as opaque ink or photoresist. The light shielding layer 31 is located in the non-visible area B of the cover 30 and covers the non-visible area.

The cover plate 30 and the first transparent substrate 10 are bonded together through the first transparent insulating adhesive 40. The first surface 101 can face the cover 30 or face away from the cover 30. In the present embodiment, the first surface 101 faces the cover 30, but the invention is not limited thereto. The first electrode shaft 111 corresponds to the visible area A of the cover plate 30, and the first wire corresponds to the non-visible area B of the cover plate 30. The light shielding layer 31 is formed on the surface of the cap plate 30 facing the first transparent substrate 10, thereby preventing the user from perceiving the setting of the first wire 112. In other embodiments, the light shielding layer 31 may be formed on the surface of the cover plate 30 facing away from the first transparent substrate 10. This embodiment is not limited thereto.

Referring to FIG. 7 and FIG. 8 together, FIG. 7 is a schematic view showing a third embodiment of the touch panel of the present invention; and FIG. 8 is a schematic view showing a second conductive structure in the seventh figure. The touch panel provided by the third embodiment further includes a second transparent insulating paste 50 , a second transparent substrate 20 , and a second conductive structure 21 . The second transparent substrate 20 is selected to be identical to the first transparent substrate 10. The second conductive structure 21 is formed on the second surface 201 of the second transparent substrate 20. The structure and formation method of the second conductive structure 21 is similar to that of the first conductive structure 11. The second conductive structure 21 includes a plurality of second conductive units 210 arranged at intervals, and the adjacent second conductive units 210 are insulated from each other. Each of the second conductive units 210 includes a second electrode axis 211 and a second wire 212 electrically connected to a second electrode axis 211. The second wire 212 is used to transmit a signal in the second electrode shaft 211. The second electrode axis 211 is arranged along the second direction Y and the second wire 212 is located at one end of the second electrode axis 211 in the second direction Y, and the first direction X and the second direction Y are perpendicular to each other. The second electrode axis 211 is formed by a grid of interconnected electrode conductive lines (not shown). Wherein, in order to make the second electrode axis 211 invisible, the electrode conductive line (not shown) of the second electrode shaft 211 has a width ranging from 5 to 7 μm, preferably any line width of 5 μm, 6 μm or 7 μm. The area ratio of the area of the electrode conductive line (not shown) in the second electrode axis 211 to the second electrode axis 211 is 1:100.

The first transparent substrate 10 and the second transparent substrate 20 are bonded to each other through the second transparent insulating paste 50. The second surface 201 is facing or facing away from the cover 30, which in the present embodiment faces the cover 30.

Referring to FIG. 9 , a ninth drawing is a schematic view showing a fourth embodiment of the touch panel of the present invention. The touch panel provided by the fourth embodiment further includes a transparent conductive layer 32 and a wire group 33. A transparent conductive layer 32 is formed on the surface of the cap plate 30, and A portion of the light shielding layer 31 is covered. Specifically, the transparent conductive layer 32 is located between the cover plate 30 and the first transparent substrate 10 and at least in the visible area A of the cover 30. The transparent conductive layer 32 includes a plurality of transparent electrode axes (not shown) extending in the second direction Y, wherein the plurality of transparent electrode axes are electrically insulated from each other and the first direction X and the second direction Y are perpendicular to each other. The material of the transparent conductive layer 32 may be indium tin oxide (ITO), nano silver, graphene or the like.

The wire group 33 is mainly disposed with the surface of the light shielding layer 31 and located between the light shielding layer 31 and the first transparent substrate 10. The wire group 33 is electrically connected to the transparent conductive layer 32 for transmitting signals in the transparent conductive layer 32. The material of the wire group 33 is silver. In addition, the material of the wire group 33 may also be copper, aluminum, iron or tin. For the material of the wire group 33, the present invention is not limited thereto. Any one that can be electrically connected to the conductive structure belongs to the wire group 33 of the touch panel of the present invention, and the technical field of the present invention should be Understand, and can select the wire set 33 of different materials according to their own needs, so it will not be described here.

Please refer to the tenth figure, which shows a schematic view of a fifth embodiment of the touch panel of the present invention. Compared with the fourth embodiment, the touch panel provided by the fifth embodiment is different in that the light shielding layer 31 covers a portion of the transparent conductive layer 32. A plurality of via holes 311 are formed through the light-shielding layer 31 at a lamination position of the transparent conductive layer 32. The spaces formed by the via holes 311 are respectively filled with conductive blocks (not shown), and the conductive blocks are used. The wire set 33 is electrically connected to the transparent conductive layer 32. The conductive block (not shown) is a conductive material having the same or similar color as the light shielding layer 31 to prevent the conductive vias 311 and the conductive blocks from being visible and affecting the visual appearance of the touch panel.

In summary, the present invention provides a touch panel in which silver is used as a material for a conductive structure instead of a conventional indium tin oxide. Thus, it is difficult to achieve low indium tin oxide. The disadvantage of resistance and easy breakage, and improve the efficiency of the touch panel manufacturing process. The invention only needs to complete the pattern formation on the first conductive structure by the same procedure, and does not need to additionally design such as a wire to electrically connect the first conductive structure of the invention, thereby improving the efficiency of the touch panel process. In addition, the material of the first conductive structure is silver with good ductility, and when the first conductive structure is wound, cut or bonded on the flexible first transparent substrate, the crack is not easy to occur, thereby improving the touch. The reliability of the control panel.

So far, the preferred embodiment of the touch panel of the present invention has been described by the above description and the drawings. All of the features disclosed in this specification may be combined with other structures, and each of the features disclosed in this specification may be selectively replaced with the same, equal or similar purpose features, and thus, in addition to the particularly salient features All of the features disclosed in this specification are only one example of equal or similar features. After the description of the preferred embodiment of the present invention, it should be understood by those skilled in the art that the present invention is a novel, progressive, and practical invention, and has profound development value. The present invention has been modified by those skilled in the art and is intended to be modified as described in the appended claims.

10‧‧‧visible area

11‧‧‧Invisible area

101‧‧‧ first surface

111‧‧‧First electrode shaft

112‧‧‧First wire

Claims (11)

A touch panel includes: a first transparent substrate having a first surface; and a first conductive structure formed on the first surface; wherein the first conductive structure is made of silver and the first The conductive structure includes a plurality of spaced apart first conductive units, each of the first conductive units being included in the same process to complete a first electrode axis extending in a first direction and a first end in the first direction with the first electrode axis A first wire connected, wherein the first electrode axis is formed by a grid of interconnected electrode conductive lines. The touch panel of claim 1, wherein an area ratio of an area of the electrode conductive line to the first electrode axis in the first electrode axis is 1:100. The touch panel of claim 1, wherein the electrode conductive line has a line width of 5 um. The touch panel of claim 1, wherein the first wire extends in a first direction. The touch panel of claim 1, further comprising: a cover plate divided into a visible area and a non-visible area adjacent to the visible area; and a first transparent insulating adhesive that fits the The cover plate and the first transparent substrate are located in the visible area, the first wire is located in the non-visible area, and the first surface is facing or facing away from the cover plate. The touch panel of claim 5, further comprising: a second transparent substrate having a second surface; a second conductive structure, the second conductive structure being formed on the second surface and The second conductive structure includes a plurality of second conductive units insulated from each other, wherein the second conductive structure is made of silver, and each of the second conductive units includes a second electrode axis extending in the second direction and a second wire connected to one end of the second electrode shaft in a second direction, wherein the second electrode axis is formed by a grid of interconnected electrode conductive lines, the first direction intersects the second direction; and a second transparent insulating paste is attached The first transparent substrate and the second transparent substrate are disposed, the second electrode axis is located in the visible area, the second wire is located in the non-visible area, and the second surface is facing or facing away from the cover. The touch panel of claim 5, further comprising: a light shielding layer located in the non-visible area of the cover and covering the non-visible area. The touch panel of claim 7, further comprising: a transparent conductive layer formed on a surface of the cover plate facing the first transparent substrate and located at least in a visible area of the cover plate, The transparent conductive layer includes a plurality of transparent electrode shafts extending in a second direction, wherein the transparent electrode axes are electrically insulated from each other and the first direction is perpendicular to the second direction; and a wire group is formed in the orientation of the light shielding layer The table of the first transparent substrate And the wire set is electrically connected to the transparent conductive layer. The touch panel of claim 8, wherein the light shielding layer is formed on a surface of the cover plate facing the first transparent substrate, and the transparent conductive layer covers a portion of the light shielding layer. The touch panel of claim 9, wherein the light shielding layer partially covers the transparent conductive layer, wherein the light shielding layer forms a plurality of via holes penetrating the transparent conductive layer, and each of the via holes is filled a conductive block electrically connected to the transparent conductive layer through a conductive block in the via. The touch panel of claim 10, wherein the color of the conductive block is the same as or similar to the color of the light shielding layer.