CN106484169B - Touch panel and joint structure thereof - Google Patents
Touch panel and joint structure thereof Download PDFInfo
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- CN106484169B CN106484169B CN201510555658.3A CN201510555658A CN106484169B CN 106484169 B CN106484169 B CN 106484169B CN 201510555658 A CN201510555658 A CN 201510555658A CN 106484169 B CN106484169 B CN 106484169B
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Abstract
The invention provides a touch panel, which is provided with a visible area and a non-visible area surrounding the visible area, and comprises: a substrate; the first decorative layer is arranged on the substrate; and the second decorative layer is arranged on the substrate and defines at least one hollowed-out area range together with the first decorative layer, wherein the second decorative layer is close to the edge of the hollowed-out area relative to the first decorative layer. The invention also provides a printing method of the touch panel. Therefore, the ink overflow amount is reduced by a method of printing in multiple times, so that the edge of the hollowed-out area is smoother.
Description
Technical Field
The present invention relates to a touch panel, and more particularly, to a touch panel having a layered printed decoration layer.
Background
With the rapid development of smart phones and tablet computers, touch panels are under demand for applications of such handheld electronic devices, and the industry is continually motivated to develop and improve related process technologies so as to reduce the production cost of the touch panels and manufacture more personalized touch panels.
Conventionally, in the prior art, a touch panel is divided into a visible area and a non-visible area, the visible area is mainly used for displaying an image and layout of touch electrodes, the non-visible area is mainly used for layout of visible conductive lines and arrangement of various icons, and a decorative layer is generally arranged on the non-visible area for shielding the conductive lines and displaying various icons. The printing result of the decorative layer directly affects the appearance of the touch panel.
Fig. 1A and 1B are a top view and a cross-sectional view of a touch panel according to the prior art, respectively. As shown in fig. 1A and 1B, the touch panel 10 has a substrate 100, a sensing layer (not shown) that can be attached to or directly fabricated on a plane of the substrate 100 different from a touch operation, and the substrate 100 includes a non-visible region 100a and a visible region 100B. The non-visible area 100a is usually a decorative layer for shielding the circuit on the touch panel. The non-visible region 100a is typically formed by printing a single decorative layer 110 on the substrate 100. However, when the printing area of the single decorative layer 110 is large, the ink overflow 120 is easily generated at the edge of the printing area, that is, at the boundary between the visible area 100b and the non-visible area 100a, and the edge is uneven. In addition, large area printing is more prone to problems such as increased labor intensity for wiping the screen, increased frequency for wiping the screen, and reduced printing efficiency.
Disclosure of Invention
In order to solve the above problems, the present invention provides a touch panel having a visible area and a non-visible area surrounding the visible area, comprising: a substrate; the first decorative layer is arranged on the substrate; and the second decorative layer is arranged on the substrate and defines at least one hollowed-out area range together with the first decorative layer, wherein the second decorative layer is close to the edge of the hollowed-out area relative to the first decorative layer.
In one embodiment, the second decorative layer at least partially overlaps the first decorative layer and forms an overlapping region and a non-overlapping region.
In one embodiment, the first decorative layer is adjacent to the second decorative layer, and the width of the first decorative layer is 100 μm to 2900 μm.
In one embodiment, the first decorative layer is located above the second decorative layer in the overlapping region.
In one embodiment, the second decorative layer is positioned on the first decorative layer to form an overlap.
In one embodiment, the width of the overlapping region is 50 μm to 500 μm and the width of the non-overlapping region is 100 μm to 1000 μm.
In one embodiment, the width of the second decorative layer is smaller than the width of the first decorative layer.
In one embodiment, the first decorative layer and the second decorative layer are made of different color inks.
In one embodiment, the first decorative layer and the second decorative layer are made of the same color ink.
In one embodiment, the non-overlapping region has a width of 100 μm to 300 μm.
In one embodiment, the first decorative layer and/or the second decorative layer is printed by a plurality of ink layers.
The invention also provides a printing method for the touch panel, which comprises the following steps: providing a substrate; forming a first decorative layer on the substrate; forming a second decorative layer on the substrate and defining at least one hollow area with the first decorative layer, wherein the second decorative layer is close to the edge of the hollow area relative to the first decorative layer, and the width of the second decorative layer is smaller than that of the first decorative layer; wherein the first decorative layer is adjacent to the second decorative layer.
The invention also provides another printing method for a touch panel, which comprises the following steps: providing a substrate; forming a second decorative layer on the substrate and defining at least one hollow area with the first decorative layer, wherein the second decorative layer is close to the edge of the hollow area relative to the first decorative layer, and the width of the second decorative layer is smaller than that of the first decorative layer; wherein the second decorative layer and the first decorative layer are partially overlapped and form an overlapped area and a non-overlapped area, and the width of the non-overlapped edge area is 100 μm to 2900 μm.
The invention divides the whole printing area into multiple areas for small-area printing. The ink quantity required by printing in a small area is small, the phenomenon of ink overflow or ink accumulation at the edges of a visible area and a hollowed pattern is greatly reduced, the labor intensity and the frequency of wiping the screen printing plate can be reduced, and the printing efficiency and the printing quality are further improved.
Drawings
FIGS. 1A and 1B are schematic top and cross-sectional views of a touch panel according to the prior art;
FIG. 2 is a top view of a touch panel according to some embodiments of the invention;
fig. 3A and 3B are schematic cross-sectional views of a touch panel during manufacturing according to some embodiments of the invention;
FIG. 3C is a flowchart of a printing method for a touch panel according to an embodiment of the invention;
FIG. 4A is a schematic cross-sectional view of a touch panel during manufacturing according to an embodiment of the invention;
FIG. 4B is a flowchart showing a printing method for a touch panel according to an embodiment of the invention;
fig. 5 is a schematic cross-sectional view of a touch panel during manufacturing according to an embodiment of the invention.
FIG. 6 is an enlarged schematic cross-sectional view of a decoration layer of a touch panel according to an embodiment of the invention;
the main symbol:
10. a touch panel;
30. a touch panel;
100. a protective cover plate;
100a non-viewable area;
100b visual area;
120. ink overflow;
201. a pattern;
300. a substrate;
300a non-viewable area;
300b visual area;
301. an operation surface;
303. a bonding surface;
310. a first decorative layer;
310a an ink layer;
320. a second decorative layer;
an O overlap region;
p non-overlapping regions.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the attached drawings, it being noted that the drawings are not to scale, and in fact, the size of the elements may be arbitrarily enlarged or reduced for clarity of presentation of the features of the invention, whereas in the description and drawings the same or similar elements will be represented by like numerals. Additional steps may be present before, during, or after the method is performed, and some of the steps may be replaced or deleted in the methods of other embodiments.
Referring to fig. 2, the touch panel 30 is divided into a visible area 300b and a non-visible area 300a surrounding the visible area 300b, wherein the visible area 300b is mainly used for displaying an image and touch operations, the non-visible area 300a is mainly used for arranging visible conductive lines (not shown) and various icons 201, and a decorative layer is generally disposed on the non-visible area 300a for defining respective area ranges of the visible area 300b and the non-visible area 300a and shielding the conductive lines. In addition, the decoration layer may be further patterned to define the hollowed-out areas with the various patterns 201, such as trademark patterns 203, infrared (IR) holes (not shown), icons (icon), and the like. In the embodiment of the present invention, the invisible area 300a is overprinted with a zoned printing ink near the edges of the visible area 300b and various patterns 201, such as trademark patterns, infrared (IR) holes (not shown) and icons (icon).
Referring to fig. 3A and 3B for a specific overprinting method, fig. 3A and 3B are schematic cross-sectional views and top views of the touch panel 30. The touch panel 30 includes: a substrate 300, a first decorative layer 310 and a second decorative layer 320. The first decorative layer 310 and the second decorative layer 320 are disposed on the substrate 300 and together define at least one hollow area, wherein the second decorative layer 320 is close to the edges of the hollow areas relative to the first decorative layer 310. In addition, the hollowed-out area may be the visible area 300B of the touch panel 30 and/or the pattern 201 formed in the non-visible area 300a of the touch panel 30, such as trademark graphics, infrared (IR) holes (not shown) and icons (icon), and in fig. 3A and 3B, only the visible area 300B is taken as an example of the hollowed-out area.
The material of the first decorative layer 310 and the second decorative layer 320 may be selected from ink or photoresist. In addition, in order to make the second decoration layer 320 relatively close to the hollowed-out area have a smaller area of printing, the width of the second decoration layer 320 in the present embodiment is preferably smaller than the width of the first decoration layer 310. Of course, the widths of the first decorative layer 310 and the second decorative layer 320 can be adjusted according to the range of the non-visible area 300a of the touch panel 30 and/or the actual size of the pattern 201. If the first decorative layer 310 and the second decorative layer 320 are used to define the visible area 300b and the non-visible area 300a in fig. 3A, the width of the first decorative layer 310 may be, for example, 100 μm to 2900 μm, and the width of the second decorative layer 320 may be, for example, 150 μm to 1500 μm, and more preferably, 150 μm to 500 μm.
More specifically, in this embodiment, the second decoration layer 320 is partially overlapped with the first decoration layer 310 to form an overlapped region O and a non-overlapped region P due to the process. In the overlap region O, the second decorative layer 320 is located on the first decorative layer 310, and in one embodiment, the width of the overlap region O is 50 μm to 500 μm. The width of the non-overlapping region P is designed to correspond to the printing of the small area, and in one embodiment, the width of the non-overlapping region P is 100 μm to 1000 μm, and more preferably, the width is 100 μm to 300 μm. Therefore, the present embodiment divides a conventional larger area decoration layer into at least two areas, such as the first decoration layer 310 and the second decoration layer 320, to perform small area printing, so as to effectively avoid ink overflow and saw-tooth edge phenomenon.
It should be noted that, in order to clearly show the relative positions of the first decorative layer 310 and the second decorative layer 320, different patterns are used to show the first decorative layer 310 and the second decorative layer 320 in the present invention, but they are not limited to the materials or colors of the first decorative layer 310 and the second decorative layer 320 that are the same or different.
The substrate 300 may serve as a protective cover (cover lens) for the touch panel 30. The material of the substrate 300 may be selected from glass, reinforced glass, sapphire, polyethylene terephthalate (PET), and polyester film (PC), which is not limited to the present invention. Furthermore, if the material of the substrate 300 is glass, the formation of the substrate 300 may include strengthening processes to provide more rigid protection. In one embodiment, the enhancement process may be a chemical ion exchange process.
As described above, the substrate 300 has an operation surface 301 exposed outwards and a bonding surface 303 to be bonded with a plate (not shown), such as a touch substrate with a touch sensing layer or an upper polarizer of a display panel. The operation surface 301 is exposed outside the touch device after the touch device is assembled, and the bonding surface 303 can be overprinted with the first decorative layer 310 and the second decorative layer 320.
Next, referring to fig. 3C, a specific process of the touch panel 30 is described, and the first decoration layer 310 and the second decoration layer 320 may be manufactured by using a screen printing method. First, a first decorative layer 310 is screen-printed on a substrate 300 with a large mesh; next, pre-baking the first decorative layer 310 to be cured; thirdly, printing a second decorative layer 320 on the substrate 300 on which the first decorative layer 310 has been printed by using a screen with smaller meshes, so that the second decorative layer 320 is partially overlapped with the first decorative layer 310 to form an overlapped area O and a non-overlapped area P, wherein the second decorative layer 320 and the first decorative layer 310 jointly define the range of at least one hollowed-out area (such as a visible area 300 b) according to the screen design, and the second decorative layer 320 is close to the edge of the hollowed-out area relative to the first decorative layer 310; finally, the second decorative layer 320 is pre-baked to be cured.
In this embodiment, the material of the second decorative layer 320 may be the same as that of the first decorative layer 310. In particular, the first decorative layer 310 and the second decorative layer 320 may use the same color ink. Because the second decoration layer 320 uses a smaller screen, the frequency of wiping the screen can be reduced by about 20% to 30%, and the printing efficiency can be improved by about 20%. And during the printing process, the overflow amount of the ink is greatly reduced, so that the edge of the second decorative layer 320 is smoother than the edge of the first decorative layer 310. In addition, since the first decorative layer 310 and the second decorative layer 320 adopt the same color ink, the second decorative layer 320 can further compensate for the edge of the first decorative layer 310 and provide a smoother edge, so that the edges of the hollowed-out areas such as the visible area 300b and the pattern 201 are smoother, and the appearance of the touch panel 30 is improved.
Referring to fig. 4A, fig. 4A is a schematic diagram of another embodiment of the present invention. The touch panel 30 of the present embodiment is substantially the same as the embodiment shown in fig. 2A, except that the second decoration layer 320 and the first decoration layer 310 are partially overlapped to form an overlapping area O, in which the first decoration layer 310 is located above the second decoration layer 320.
Please refer to fig. 4B together to illustrate a specific process of the touch panel 30. First, a second decorative layer 320 is printed on a substrate 300 by using a screen with smaller meshes; second, pre-baking the second decorative layer 320 to cure it; furthermore, the first decoration layer 310 is printed on the substrate 300 on which the second decoration layer 320 has been printed by using a screen with larger meshes, so that the second decoration layer 320 and the first decoration layer 310 are partially overlapped to form an overlapped area O, and a non-overlapped area P is formed at an area of the second decoration layer 320 which is not covered by the first decoration layer 310. The second decoration layer 320 and the first decoration layer 310 define a range of at least one hollowed-out area (such as the visible area 300 b) according to the screen design, and the second decoration layer 320 is close to an edge of the hollowed-out area relative to the first decoration layer 310. Finally, the first decorative layer 310 is pre-baked to be cured.
In this embodiment, the material of the second decorative layer 320 may be the same as that of the first decorative layer 310. The first decorative layer 310 and the second decorative layer 320 can use the same color ink, and the second decorative layer 320 uses a screen with smaller meshes, so that the overflow amount of the ink is greatly reduced, and the edge of the second decorative layer 320 is smoother than the edge of the first decorative layer 310. Therefore, when the first decorative layer 310 and the second decorative layer 320 are made of the same color ink, the second decorative layer 320 can cover the edge of the first decorative layer 310 and display a flat edge, so that the edges of the hollowed-out areas such as the visible area 300b and the pattern 201 are smoother, and the appearance of the touch panel 30 is improved. Particularly, the first decorative layer 310 and the second decorative layer 320 can use different color inks, and since the second decorative layer 320 uses a screen with smaller meshes, in the printing process, the overflow amount of the ink is greatly reduced, so that two edges of the second decorative layer 320 are smoother than those of the first decorative layer 310, and in addition, the edges of the first decorative layer 310 with larger area can be shielded due to the partial overlapping of the second decorative layer 320 and the first decorative layer 310, so as to achieve the decoration effect, not only the edges of the hollowed-out areas such as the visible area 300b and the pattern 201 are smoother, but also the touch panel 30 has the effect of a multicolor frame, and the appearance of the touch panel 30 is improved.
Referring to fig. 5, fig. 5 is a schematic diagram of another embodiment of the present invention, which is similar to the above embodiment, except that the first decoration layer 310 and the second decoration layer 320 are disposed adjacent to each other without overlapping. In contrast, if the second decorative layer 320 fails to print during the process, a small amount of ink is wasted and reworking is easy.
Please refer to fig. 6, which is an enlarged schematic cross-sectional view of the first decorative layer 310 and the second decorative layer 320. In one embodiment, the first decorative layer 310 is printed by a plurality (more than two) of ink layers 310 a. For example, the first decorative layer 310 is formed by three ink layers 310 a. The first decorative layer 310 formed by multiple printing has a stepped structure at an edge portion. In another embodiment, the second decoration layer 320 may be printed by a plurality of ink layers. In this way, the first decorative layer 310 and the second decorative layer 320 can achieve good optical rotation shielding performance.
It should be noted that the touch panel of the present disclosure may also include other structures, such as a sensing electrode layer, a touch sensing layer, or a touch signal wire. The above structure can be made by any known method or material.
In summary, the present invention provides a printing structure and a method for a touch panel, which uses overprinting to print a large-area printing area in multiple and separate areas. The printing close to the edge of the hollowed-out area is small-area printing. The ink quantity required by printing in a small area is small, and the phenomenon of ink overflow is greatly reduced, so that the labor intensity and frequency of wiping the screen printing plate can be reduced, and the printing efficiency and quality are further improved.
Although the present invention has been described with respect to several preferred embodiments, it should be understood by those skilled in the art that the present invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (12)
1. A touch panel having a viewable area and a non-viewable area surrounding the viewable area, comprising:
a substrate;
the first decorative layer is arranged on the substrate; and
the second decorative layer is arranged on the substrate and defines at least one hollowed-out area range together with the first decorative layer, wherein the second decorative layer is close to the edge of the hollowed-out area relative to the first decorative layer; the width of the second decorative layer is smaller than that of the first decorative layer; wherein the second decorative layer at least partially overlaps the first decorative layer and forms an overlapping region and a non-overlapping region;
the width of the second decorative layer is 150 μm to 500 μm;
the width of the overlap region is 50 μm to 500 μm;
the non-overlapping region has a width of 100 μm to 300 μm.
2. The touch panel of claim 1, wherein the first decorative layer is adjacent to the second decorative layer, the first decorative layer having a width of 100 μm to 2900 μm.
3. The touch panel of claim 1, wherein the first decorative layer is located above the second decorative layer in the overlapping region.
4. The touch panel of claim 1, wherein the second decorative layer is disposed over the first decorative layer to form an overlay.
5. The touch panel of claim 3, wherein the first decorative layer and the second decorative layer are made of different color inks.
6. The touch panel of claim 4, wherein the first decorative layer and the second decorative layer are of the same color.
7. The touch panel of claim 1, wherein the first decorative layer and/or the second decorative layer is printed by a plurality of ink layers.
8. A printing method for a touch panel, comprising:
providing a substrate;
forming a first decorative layer on the substrate; and
forming a second decorative layer on the substrate and defining at least one hollow area with the first decorative layer, wherein the second decorative layer is close to the edge of the hollow area relative to the first decorative layer;
wherein the first decorative layer is adjacent to the second decorative layer;
the width of the second decorative layer is smaller than that of the first decorative layer; wherein the second decorative layer at least partially overlaps the first decorative layer and forms an overlapping region and a non-overlapping region;
the width of the second decorative layer is 150 μm to 500 μm;
the width of the overlap region is 50 μm to 500 μm;
the non-overlapping region has a width of 100 μm to 300 μm.
9. A printing method for a touch panel, comprising:
providing a substrate;
forming a first decorative layer on the substrate; and
forming a second decorative layer on the substrate and defining at least one hollow area with the first decorative layer, wherein the second decorative layer is close to the edge of the hollow area relative to the first decorative layer;
wherein the second decorative layer is partially overlapped with the first decorative layer and forms an overlapped area and a non-overlapped area;
the width of the second decorative layer is smaller than that of the first decorative layer;
the width of the second decorative layer is 150 μm to 500 μm;
the width of the overlap region is 50 μm to 500 μm;
the non-overlapping region has a width of 100 μm to 300 μm.
10. The printing method for a touch panel according to claim 9, wherein the forming of the first decorative layer is subsequent to the forming of the second decorative layer.
11. The printing method for a touch panel according to claim 9, wherein overprinting of the first decorative layer precedes overprinting of the second decorative layer.
12. The printing method of claim 9, wherein the first decorative layer and/or the second decorative layer is formed by overprinting a plurality of ink layers.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510555658.3A CN106484169B (en) | 2015-09-02 | 2015-09-02 | Touch panel and joint structure thereof |
| TW105200370U TWM519770U (en) | 2015-09-02 | 2016-01-12 | Touch panel |
| TW105100767A TWI590123B (en) | 2015-09-02 | 2016-01-12 | Touch panel and method for printing touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510555658.3A CN106484169B (en) | 2015-09-02 | 2015-09-02 | Touch panel and joint structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106484169A CN106484169A (en) | 2017-03-08 |
| CN106484169B true CN106484169B (en) | 2023-08-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510555658.3A Active CN106484169B (en) | 2015-09-02 | 2015-09-02 | Touch panel and joint structure thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106484169B (en) |
| TW (2) | TWI590123B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113429131A (en) * | 2021-06-22 | 2021-09-24 | 江苏源成隆光电科技有限公司 | Glass panel for electronic equipment |
| CN113597166A (en) * | 2021-07-30 | 2021-11-02 | Oppo广东移动通信有限公司 | Shell assembly, manufacturing method thereof and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103631409A (en) * | 2012-08-21 | 2014-03-12 | 宸鸿科技(厦门)有限公司 | Touch device and manufacturing method thereof |
| WO2014114213A1 (en) * | 2013-01-28 | 2014-07-31 | 宸鸿科技(厦门)有限公司 | Touch panel and manufacturing method therefor |
| CN104750297A (en) * | 2013-12-25 | 2015-07-01 | 胜华科技股份有限公司 | decorative panel and touch device |
| CN204990239U (en) * | 2015-09-02 | 2016-01-20 | 宸鸿科技(厦门)有限公司 | Touch panel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201512916A (en) * | 2013-09-18 | 2015-04-01 | Wintek Corp | Touch panel |
-
2015
- 2015-09-02 CN CN201510555658.3A patent/CN106484169B/en active Active
-
2016
- 2016-01-12 TW TW105100767A patent/TWI590123B/en active
- 2016-01-12 TW TW105200370U patent/TWM519770U/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103631409A (en) * | 2012-08-21 | 2014-03-12 | 宸鸿科技(厦门)有限公司 | Touch device and manufacturing method thereof |
| WO2014114213A1 (en) * | 2013-01-28 | 2014-07-31 | 宸鸿科技(厦门)有限公司 | Touch panel and manufacturing method therefor |
| CN104750297A (en) * | 2013-12-25 | 2015-07-01 | 胜华科技股份有限公司 | decorative panel and touch device |
| CN204990239U (en) * | 2015-09-02 | 2016-01-20 | 宸鸿科技(厦门)有限公司 | Touch panel |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201710857A (en) | 2017-03-16 |
| TWM519770U (en) | 2016-04-01 |
| TWI590123B (en) | 2017-07-01 |
| CN106484169A (en) | 2017-03-08 |
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