TWM470308U - Touch panel - Google Patents

Abstract

A touch panel includes a substrate, a first shielding layer and a second shielding layer. The first shielding layer is printed to form on a surface of the substrate. The second shielding layer is printed to form on the first shielding layer. Furthermore, the second shielding layer covers the first shielding layer, and one side of the second shielding layer is connected to the surface of the substrate.

Description

Touch panel

The present invention relates to a touch panel, and more particularly to a touch panel having a printed shielding layer.

The touch display is an input/output device formed by combining sensing technology and display technology, and is commonly used in electronic devices, such as portable and handheld electronic devices.

A capacitive touch panel is a commonly used touch panel that utilizes a capacitive coupling effect to detect a touch position. When the finger touches the surface of the capacitive touch panel, the capacitance of the corresponding position is changed, and the touch position is detected. Therefore, in the production of a full-plane touch panel, the surface glass is particularly important and important in the yield of the bonding process.

In the current process of the cover glass or the nameplate of the touch panel 100, the surface masking frame is generally prepared first, and then the pattern layer is applied. Specifically, as shown in FIG. 1A, the shielding layer 120 is first formed on the cover glass 110, and the first shielding layer 122 and the second shielding layer 124 are sequentially formed on the cover glass 110. Next, the pattern layer 130 is further produced and colored. However, this will partially expose the pattern layer 130 to the outside of the masking layer 120, so that in the subsequent bonding process, the pattern layer 130 is susceptible to scratch damage and reduces its process yield.

Secondly, as shown in FIG. B, in the process of masking the surface of the frame, it is often necessary to repeatedly print a plurality of layers of the shielding layer 120 to have a better shading effect. However, the current general production method uses layer by layer. The retracting method performs printing stacking in sequence. As shown in the figure, since the first shielding layer 122, the second shielding layer 124, the third shielding layer 126, and the fourth shielding layer 128 are sequentially printed on the upper surface of the cover glass 110, the edge of the shielding layer 120 is caused to have The stepped appearance structure will improve the process difficulty of subsequent bonding to other components and result in a decrease in yield.

In addition, referring to the first C diagram, in the current manufacturing process of the touch panel, the shielding layer 120 is generally printed on the cover glass 110, and then bonded to the other sensing element layer 140. However, since the process yield is greatly reduced as the size of the cover glass is larger, the overall manufacturing cost of the touch panel is increased if a slight scratch occurs in the cover glass during the printing production period.

In view of the conventional touch panel, the yield of the shielding layer 120 is limited, resulting in high component material consumption and high manufacturing cost. Therefore, it is urgent to propose a touch panel having a novel printing process for improving the use of the conventional printing method. The shortcomings of the touch panel.

In view of the above, one of the objects of the present embodiment is to provide a touch panel having a smoother printing method flow, which can effectively improve product yield and greatly reduce manufacturing costs.

According to an embodiment of the present invention, a touch panel includes a substrate, a first shielding layer, and a second shielding layer. The first masking layer is printed on one surface of the substrate. The second shielding layer is printed on the first shielding layer. The second shielding layer covers the first shielding layer, and one side of the second shielding layer is connected to the surface of the substrate.

A method for printing a touch panel is disclosed, and the disclosed method can be used in the touch panel 200 to form the shielding layer 220, as shown in FIG. 2A, which is illustrated according to an embodiment of the present invention. A schematic diagram of a printing method of a touch panel. In this embodiment, first, a substrate 210 is provided; then, a first shielding layer 222 is formed on one surface of the substrate 210; further, a second shielding layer 224 is formed on the first shielding layer 222, wherein The second shielding layer 224 covers the first shielding layer 222 , and one of the second shielding layers 224 is laterally connected to the surface of the substrate 210 .

More specifically, the printing order of the masking layer 220 is printed layer by layer from the edge of the substrate 210 toward the center, such that the second masking layer 224 can completely stack the first masking layer 222. In this way, the shielding layer 220 can have a smooth contoured surface to improve the flatness, thereby greatly improving the yield of the subsequent bonding process.

In addition, the material of the first shielding layer 222 and the second shielding layer 224 may be ink, that is, the shielding layer 220 is formed by printing on the substrate 210 layer by layer by ink printing technology. The shading effect of the ink can adjust the number of printed layers of the shielding layer 220 and the thickness thereof according to the color or material of the ink, thereby obtaining the desired shading effect. For example, as shown in FIG. 2B, when the coloring ink of the shielding layer 220 is selected as a light color pigment, since the light transmittance is high, the number of printed layers of the shielding layer 220 must be increased, resulting in formation. The first shielding layer 222, the second shielding layer 224, the third shielding layer 226 and the fourth shielding layer 228 are provided to achieve the desired shading effect.

In addition, in another embodiment, after printing the first shielding layer 222 on the substrate 210, a pattern layer 230 is printed on the first shielding layer 222, wherein the pattern layer 230 is attached to The surface of the substrate 210. In this embodiment, the substrate 210 may be a cover glass, wherein although the cover glass system in the second C diagram has a two-dimensional contour, the present invention is not limited thereto, that is, it may be a two-dimensional or three-dimensional contour, respectively. Applied to 2D or 3D touch display. In an embodiment, the cover glass comprises a flexible material or a hard material, and the surface material of the cover glass can be treated by a special process to have functional properties such as abrasion resistance, scratch resistance, anti-reflection, anti-glare and anti-fingerprint. In addition, the pattern layer 230 may include words, numbers, symbols, images, or a combination thereof.

Then, after the pattern layer 230 is completed, the second mask layer 224 is printed to completely cover the first mask layer 222 and the pattern layer 230, thereby providing a perfect scratch protection mechanism for the pattern layer 230, thereby shielding layer 220. Not only can it be smoothly applied to other touch sensing layers or insulating layers, but also the pattern layer 230 can be scratched to effectively improve the process yield.

Referring to FIG. 2D, in another embodiment, the substrate 210 is a flexible flexible board or a transparent substrate. The substrate 210 may have at least one sensing electrode element. In addition, the substrate 210 may also include an insulating material or a photosensitive material. However, when the shielding layer 220 is sequentially formed on the substrate 210 layer by layer, a cover glass 240 is attached to the shielding layer 220. In more detail, as shown in the figure, the top surface of the second shielding layer 224 is attached to the surface of the cover glass 240. In addition, in this embodiment, the cover glass 240 may be a two-dimensional or three-dimensional contour, which is respectively applied to a two-dimensional or three-dimensional touch display, and the cover glass 240 includes a flexible material or a hard material.

In this way, the shielding layer 220 is first transferred and formed by, for example, a sensing electrode layer having a sensing electrode element, an insulating layer having an insulating material, or a light transmitting layer having a photosensitive material, and then applying the same to the cover glass. The printing process of 240 mutual bonding will prevent the cover glass 240 from being damaged by collision or scratch during the process, thereby greatly reducing the overall production cost.

In addition, the present disclosure also discloses another printing method of the touch panel, which can be used in the touch panel 300 to form a plurality of shielding layers 320. 3A through 3C are flowcharts showing a method of printing a touch panel according to another embodiment of the present invention, which respectively display respective process steps.

Referring to FIG. 3A, first, a substrate 310 is provided. The substrate 310 is a flexible flexible board or a transparent substrate. The substrate 310 can have at least one sensing electrode element. Moreover, in another embodiment, the substrate 310 can comprise an insulating material or a photosensitive material.

Next, referring to FIG. 3B, a plurality of shielding layers 320 are formed on the surface of one of the substrates 310. In the third embodiment, the first shielding layer 322 and the second shielding layer 324 are formed on the substrate 310. The material of the first shielding layer 322 and the second shielding layer 324 may be ink. Although the first shielding layer 322 and the second shielding layer 324 are aligned and formed on the substrate 310, the printing method and the structure of the shielding layer 320 of the present invention are not limited thereto, and the first The shielding layer 322 and the second shielding layer 324 may also adopt a printing method such as the sequential layer-by-layer retracting stacking, the cladding stacking or the combination thereof in accordance with the actual application requirements. In addition, although in the third B diagram, wherein the shielding layer 320 is illustrated by a two-layer structure having the first shielding layer 322 and the second shielding layer 324, the structure of the masking layer 320 of the present invention is not limited thereto. The number of layers can be adjusted according to actual process conditions or needs.

Furthermore, please refer to the third C diagram to attach a cover glass 340 to the shielding layer 320. The cover glass 340 comprises a flexible material or a hard material, and the surface material of the cover glass 340 can be treated by a special process to have functional properties such as abrasion resistance, scratch resistance, anti-reflection, anti-glare and anti-fingerprint. In addition, the cover glass 340 can be a two-dimensional or three-dimensional contour, and is respectively applied to a two-dimensional or three-dimensional touch display.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention; any equivalent changes or modifications made without departing from the spirit of the disclosure should be included in the following Within the scope of the patent application.

100‧‧‧ touch panel

110‧‧‧ Covering glass
120‧‧‧Shielding layer
122‧‧‧First shielding layer
124‧‧‧Second shelter
126‧‧‧ third shielding layer
128‧‧‧ fourth shielding layer
130‧‧‧pattern layer
140‧‧‧Inductive component layer
200‧‧‧ touch panel
210‧‧‧Substrate
220‧‧‧shading layer
222‧‧‧First shielding layer
224‧‧‧Second shelter
226‧‧‧ third shielding layer
228‧‧‧4th shielding layer
230‧‧‧pattern layer
240‧‧‧ Covering glass
300‧‧‧ touch panel
310‧‧‧Substrate
320‧‧‧Shielding layer
322‧‧‧First shielding layer
324‧‧‧Second shelter
340‧‧‧ Covering glass

The first A picture shows a cross-sectional view of a conventional touch panel. The first B diagram shows a cross-sectional view of a conventional touch panel. The first C diagram shows a schematic diagram of a process of a conventional touch panel. FIG. 2A is a schematic diagram showing the process of the touch panel according to an embodiment of the present invention. FIG. 2B is a schematic diagram showing the process of the touch panel of another embodiment of the present invention. FIG. 2C is a schematic diagram showing the process of the touch panel of another embodiment of the present invention. The second D figure shows a schematic diagram of the process of the touch panel of another embodiment of the present invention. FIG. 3A is a schematic diagram showing the process of the touch panel of another embodiment of the present invention. FIG. 3B is a schematic diagram showing the process of the touch panel of another embodiment of the present invention. FIG. 3C is a schematic diagram showing the process of the touch panel of another embodiment of the present invention.

200‧‧‧ touch panel

210‧‧‧Substrate

220‧‧‧shading layer

222‧‧‧First shielding layer

224‧‧‧Second shelter

Claims (17)

A touch panel includes: a substrate; a first shielding layer formed on one surface of the substrate; and a second shielding layer printed on the first shielding layer, wherein the second shielding layer is coated The first shielding layer, and one side of the second shielding layer is connected to the surface of the substrate. The touch panel of claim 1, wherein the first shielding layer and the second shielding layer are made of ink. The touch panel of claim 1, further comprising: a pattern layer formed by printing on the first shielding layer, wherein the pattern layer is attached to the surface of the substrate. The touch panel of claim 3, wherein the pattern layer comprises a letter, a number, a symbol, an image or a combination thereof. The touch panel of claim 3, wherein the substrate is a cover glass. The touch panel of claim 5, wherein the cover glass comprises a flexible material or a hard material. The touch panel of claim 1, wherein the substrate is a flexible flexible board or a transparent substrate. The touch panel of claim 7, wherein the substrate has at least one sensing electrode element. The touch panel of claim 7, wherein the substrate comprises an insulating material or a photosensitive material. The touch panel of claim 7, further comprising: a cover glass attached to the second shielding layer, wherein a top surface of the second shielding layer is attached to a surface of the cover glass. The touch panel of claim 10, wherein the cover glass comprises a flexible material or a hard material. A touch panel includes: a substrate; a plurality of shielding layers formed on one surface of the substrate; and a cover glass attached to the shielding layers. The touch panel of claim 12, wherein the substrate is a flexible flexible board or a transparent substrate. The touch panel of claim 13, wherein the substrate has at least one sensing electrode element. The touch panel of claim 13, wherein the substrate comprises an insulating material or a photosensitive material. The touch panel of claim 12, wherein the shielding layer is made of ink. The touch panel of claim 12, wherein the cover glass comprises a flexible material or a hard material.