TW202131148A - A stacking structure for improving visual effect of single-layer touch sensing device and touch panel using same - Google Patents

Abstract

A stacked structure that improves the visual effect of a single-layer touch sensing device, by using the optical adjustment layer to adjust the refractive index of the insulating layer, the thickness of the insulating layer, or the refractive index of the second conductive layer, so that the color difference can be controlled below a fixed value. According to the above, in the stacked structure of the single-layer touch sensing device, when the conductive layer is matched with the optical adjustment layer, the visual effect problem that the conductive layer sensing circuit has obvious display is improved.

Description

Stack structure for improving visual effect of single-layer touch sensing device and touch panel using same

This creation is related to a stack structure of a single-layer touch sensing device, especially a stack structure that improves the visual effect of the single-layer touch sensing device to improve the obvious display problem of the conductive layer sensing circuit.

In recent years, the application level of touch panels has become more and more closely related to the daily life of the general public. With the development and application of touch technology, more and more industries have begun to use touch panels. For example, mobile phones, notebook computers, screens, remote controls... etc., touch panels are gradually being widely used in various electronic products as a medium for human-computer interaction.

Nowadays, no matter when and where, everyone holds a mobile device in his hand. When sitting, lying, or walking, they are watching or using it all the time.

With the development of science and technology and the cooperation and collocation of industries, the requirements for the appearance, function and sensitivity of touch panels are becoming higher and higher. Among them, in order to save costs, touch panels have also begun to develop in a single-layer structure. A type of structure design requires denser lines. Due to the large size and dense lines, the impedance required by the transparent electrode layer (indium tin oxide layer) is relatively low.

Since the patterned indium tin oxide layer of the single-layer touch panel is used to detect the touch action and position, the impedance value is inversely proportional to its thickness, that is, the lower the impedance, the thicker the thickness of the transparent electrode layer.

When the impedance of the transparent electrode layer is reduced by increasing the thickness of the transparent electrode layer, its color will become darker. Therefore, the line of the transparent electrode layer after etching will form a strong contrast with the distance between the transparent electrode layer, forming a so-called transparent electrode Layer etching traces.

In addition, the density of the lines of the transparent electrode layer and the viewing angle between the lines and the user are also the key to the obviousness of the etching traces.

When the color difference between the pattern area and the blank area of the patterned indium tin oxide layer is greater than the color difference that can be detected by the human eye, the human eye can feel the color difference, and the pattern of the indium tin oxide layer will appear on the display screen and interfere with the display screen. It is not conducive to the optical quality required by the display.

Therefore, in order to reduce the impedance, it is necessary to increase the thickness of the conductive layer, but it is also necessary to reduce the etching traces so that the related products have high market value. It is necessary to make further improvements in the structure and propose related solutions. Method.

In view of the above-mentioned conventional problems, one purpose of this creation is to provide a stacked structure that improves the visual effect of a single-layer touch sensing device, so as to solve the problem that the pattern of the indium tin oxide layer will appear on the display screen and interfere with the display screen. Due to the optical quality required by the display.

A stack structure for improving the visual effect of a single-layer touch sensing device includes a substrate stack structure, a variable stack structure and an optical adhesive layer.

The base stack structure further includes a substrate, a first optical adjustment layer and a first conductive layer. The first optical adjustment layer is located on the substrate, and the first conductive layer is located on the first optical adjustment layer.

The adjustable stack structure is located on the base stack structure, and the adjustable stack structure further includes a first insulating layer, a second conductive layer, and a second insulating layer. The first insulating layer is made of a first refractive index material, and the first insulating layer is located on the first conductive layer and has a first thickness. The second conductive layer is located on the first insulating layer and has a second thickness, and the second insulating layer is made of a second refractive index material, and the second insulating layer is located on the second conductive layer and has A third thickness.

The optical adhesive layer is located on the adjustable stack structure.

Wherein, the adjustable stack structure further includes a second optical adjustment layer, the second optical adjustment layer is located outside or one of the layers between the adjustable stack structure, and the second optical adjustment layer has a fourth optical adjustment layer. thickness.

By adjusting the fourth thickness, when light enters the adjustable stack structure from the optical adhesive layer to reflect the first conductive layer, the human eye can perceive the interaction between the positions after the light exits the optical adhesive layer. A color difference can be less than a value.

In the above, the value is 2.5.

Further, the fourth thickness is between 0.7 micrometers and 8 micrometers.

Further, the first insulating layer is made of a high-refractive material, and when the first insulating layer is stacked on the second optical adjustment layer or the second optical adjustment layer is stacked on the first insulating layer, the The first refractive index is adjusted to be between 1.8 and 2.1.

Further, the second insulating layer is made of a high-refractive material. When the second insulating layer is stacked on the second optical adjustment layer or the second optical adjustment layer is stacked on the second insulating layer, the The second refractive index is adjusted to be between 1.8 and 2.1.

Furthermore, when the second optical adjustment layer is stacked on or under the first insulating layer, the sum of the first thickness and the fourth thickness is between 3 microns and 10 microns; when the second optical adjustment layer When the layers are stacked on or under the second insulating layer, the sum of the third thickness and the fourth thickness is between 3 μm and 10 μm.

In this creation, the thickness of the substrate is 48 microns, the thickness of the first optical adjustment layer is 77.3 nm, and the thickness of the first conductive layer is 23.4 nm.

Furthermore, the second thickness is between 20 nanometers and 135 nanometers.

In the above, the chromatic aberration further includes a first chromatic aberration, a second chromatic aberration, and a third chromatic aberration. The first chromatic aberration is for comparing a first observation path with a second observation path, and the second chromatic aberration is for comparing the second observation path. Path and a third observation path, and the third color difference is to compare the first observation path with the third observation path.

Further, the first conductive layer has a first pattern area and a first blank area, and the second conductive layer has a second pattern area, a second blank area, and a dummy pattern area.

Furthermore, the first observation path is that light passes through the second insulating layer, passes through the second pattern area to the first blank area, and then reflects out of the second insulating layer.

Furthermore, the second observation path is that light passes through the second insulating layer through the dummy pattern area to the first pattern area and then reflects out of the second insulating layer.

Furthermore, the third observation path is that light passes through the second insulating layer through the second blank area to the first pattern area and then reflects out of the second insulating layer.

In addition, a touch panel applying this creation includes a substrate, a first optical adjustment layer, a first conductive layer, a second conductive layer, a first insulating layer, a second insulating layer, and a second Optical adjustment layer. The first optical adjustment layer is located on the substrate. The first conductive layer is located on the first optical adjustment layer. The second conductive layer is located on the first conductive layer. The first insulating layer is located between the first conductive layer and the second conductive layer, has a first refractive index and the first refractive index is greater than 1.5. The second insulating layer covers the second conductive layer, has a second refractive index and the second refractive index is greater than 1.5, and the second optical adjustment layer is located on the first insulating layer or the second insulating layer , By adjusting the first refractive index or the second refractive index to a third refractive index, the third refractive index is between 1.8 and 2.1. The thickness of the second optical adjustment layer is greater than the thickness of the first optical adjustment layer, and the touch panel further includes an optical adhesive layer disposed on the second insulating layer, and the second optical adjustment layer is sandwiched between the second Between the insulating layer and the optical adhesive layer.

Further, the touch panel further includes an optical adhesive layer disposed on the second insulating layer, and the second optical adjustment layer is sandwiched between the second insulating layer and the optical adhesive layer.

In addition, the first conductive layer has a first pattern area and a first blank area, the second conductive layer has a second pattern area, a dummy pattern area, and a second blank area, wherein a first observation path is The light passes through the second insulating layer, passes through the second pattern area to the first blank area, and then reflects out of the second insulating layer; a second observation path is that light passes through the second insulating layer through the dummy pattern area to the first blank area. A pattern area is reflected out of the second insulating layer; a third observation path is that light passes through the second insulating layer, passes through the second blank area to the first pattern area, and then reflects out of the second insulating layer.

Further, comparing the color difference of any two of the first observation path, the second observation path and the third observation path is less than 2.5.

In summary, by fixing the thickness of the first conductive layer, the thickness of the second conductive layer is controlled within the range where the chromatic aberration of each inspection area is the smallest, and then the refractive index of the protective layer is adjusted by changing the thickness of the optical adjustment layer. The chromatic aberration can be controlled below a fixed value, so as to solve the problem that the indium tin oxide layer pattern will appear on the display screen and interfere with the optical quality of the display screen.

Please refer to FIG. 1, FIG. 7, FIG. 8 and FIG. 9 at the same time, which are block diagrams of several preferred embodiments of the stacked structure for improving the visual effect of the single-layer touch sensing device. The present invention provides a stack structure 1 for improving the visual effect of a single-layer touch sensing device, which includes a substrate stack structure 2, a variable stack structure 3, and an optical adhesive layer 4, and the variable stack structure 3 is located on the substrate On the stack structure 2, the optical adhesive layer 4 is located on the adjustable stack structure 3.

Please refer to FIGS. 1 and 2 at the same time, the base stack structure 2 further includes a substrate 21, a first optical adjustment layer 22 and a first conductive layer 23. The first optical adjustment layer 22 is located on the substrate 21, and the first conductive layer 23 is located on the first optical adjustment layer 22. In addition, the first conductive layer 23 has a first pattern area 231 and a first blank area 232.

The variable stack structure 3 further includes a first insulating layer 31, a second conductive layer 32, and a second insulating layer 33. The first insulating layer 31 is made of a material with a first refractive index n1, the first refractive index n1 is greater than 1.5, and the first insulating layer 31 is located on the first conductive layer 23 and has a first thickness h1. The second conductive layer 32 is located on the first insulating layer 31 and has a second thickness h2. The second conductive layer 32 has a second pattern area 321, a second blank area 322, and a dummy pattern area 323, and The second blank area 322 is distributed in the dummy pattern area 323; and the second insulating layer 33 is made of a material with a second refractive index n2, the second refractive index n2 is greater than 1.5, and the second insulating layer 33 is located The second conductive layer 32 has a third thickness h3.

The projections of the patterns of the first pattern area 231 and the second pattern area 321 on the substrate 21 are complementary to each other. Therefore, a dummy pattern area 323 is provided corresponding to the first pattern area, and the dummy pattern area 323 can be reduced Chromatic aberration occurs. In this creative embodiment, the first conductive layer 23 and the second conductive layer 32 can be arranged interchangeably.

Wherein, the material of the first insulating layer 31 and the second insulating layer 33 may be transparent materials, such as organic fluorine polymer elastomer (TPF), liquid optical glue (Optical Clear Resin; OCR) dielectric insulating protective material (Overcoat; OC) and other materials; the material of the first conductive layer 23 and the second conductive layer 32 can be indium tin oxide (ITO), and nanocarbon can also be used in other embodiments Tubes, graphene and metal nanowires, etc. are not limited to this.

Wherein, the adjustable stack structure 3 further includes a second optical adjustment layer 34 located outside the adjustable stack structure 3 or between the layers of the adjustable stack structure 3 One, the second optical adjustment layer 34 has a fourth thickness h4, the fourth thickness h4 is greater than the thickness of the first optical adjustment layer 22, and the fourth thickness h4 is between 0.7 micrometers and 8 micrometers. The first refractive index n1 or the second refractive index n2 is adjusted to a third refractive index n3 by the second optical adjustment layer 34, so that when light enters the adjustable stacked structure 3 from the optical adhesive layer 4 to the first refractive index n3 After a conductive layer 23 is reflected, until the light exits the optical adhesive layer 4, human eyes can perceive that the chromatic aberration of each position can be less than a value, and the value is preferably 2.5.

In addition, in the above, the first insulating layer 31 is made of a high-refractive material, when the first insulating layer 31 is stacked on the second optical adjustment layer 34 or the second optical adjustment layer 34 is stacked on the first insulating layer When the layer 31 is on, the first refractive index n1 is adjusted to a third refractive index n3, the third refractive index n3 is between 1.8 and 2.1, and the sum of the first thickness h1 and the fourth thickness h4 is 3 microns To 10 microns.

In addition, the second insulating layer 33 is made of a high-refractive material, when the second insulating layer 33 is stacked on the second optical adjustment layer 34 or the second optical adjustment layer 34 is stacked on the second insulating layer 33 When the second refractive index n2 is adjusted to the third refractive index, the refractive index is between 1.8 and 2.1, and the sum of the third thickness h3 and the fourth thickness h4 is between 3 micrometers and 10 micrometers.

Please refer to FIG. 2 again, which is a schematic diagram of the lateral structure of the first preferred embodiment of creating a single-layer touch sensing device stack structure. The single-layer touch sensing device stack structure, due to the matching problem of the conductive layer and the optical adjustment layer, such as the conductive layer (indium tin oxide layer) and the refractive index of each layer is too large, the pattern is obvious, resulting in poor visual effects of the human eye. And it cannot be effectively improved with the current process and materials. Therefore, in order to improve the aforementioned problems, the following methods are adopted to improve:

First, as shown in FIG. 2, the color difference is sampled and compared for the part with color difference. The color difference includes a first color difference, a second color difference, and a third color difference. The first color difference is to compare a first observation path 81 and a second observation path 82, the second color difference is to compare the first observation path 81 and a third observation path 83, and the third color difference is to compare the second observation path. The path 82 and the third observation path 83.

The first observation path 81 is for light passing through the second insulating layer 33 through the second pattern area 321 to the first blank area 232 and then reflecting out of the second insulating layer 33; the second observation path 82 is for light passing through the The second insulating layer 33 reflects out of the second insulating layer 33 after passing through the dummy pattern area 323 to the first pattern area 231; the third observation path 83 is that light passes through the second insulating layer 33 and passes through the second non-patterned area. The area 322 to the first pattern area 231 reflects out of the second insulating layer 33.

In addition, in a conventional manner, the thicknesses of the substrate 21, the first optical adjustment layer 22, and the first conductive layer 23 are first fixed, the thickness of the substrate 21 is fixed to 48 microns, and the thickness of the first optical adjustment layer 22 is fixed to 77.3 nm, the thickness of the first conductive layer 23 is fixed at 23.4 nm, and the optical simulation of the chromatic aberration and the thickness of the second conductive layer 32 is performed. The result shows that the thickness of the second conductive layer 32 is 20 nm. When it reaches 135 nm, the color difference section is the smallest, and when its thickness is 20±10% nm and 120±10% nm, the second color difference and the third color difference have better values.

Secondly, under the condition that the thickness of the second conductive layer 32 is 120±10% nanometers, the optical simulation of reducing chromatic aberration is performed with the stack structure in this creation. The following conditions are changed to confirm the chromatic aberration variation in this creation :

Condition one, adjust the refractive index of the insulating layer:

Please refer to Figure 3, adjust the refractive index of the insulating layer to confirm the difference in visual effects. As shown in the figure, each chromatic aberration has a decreasing trend as the refractive index decreases. When the refractive index is 1.9, there is the smallest chromatic aberration. The first chromatic aberration is 0.50. The dichromatic aberration is 0.17, and the third chromatic aberration is 0.62, but the reflectivity increases with the increase in refractive index (increasing reflectivity equals loss of transmittance).

Condition two, adjust the thickness of the insulating layer:

Please refer to Figure 4 to adjust the thickness of the insulating layer to confirm the difference in visual effects. As shown in the figure, taking the thickness of the insulating layer of 3um and 8um as an example, the chromatic aberration and reflectivity trend will not be affected.

Condition three, adjust the refractive index of the second conductive layer:

Please refer to FIG. 5, adjusting the refractive index of the second conductive layer 32 to confirm the visual effect difference. As shown in the figure, the refractive index of the second conductive layer 32 decreases. Although the overall chromatic aberration decreases, the chromatic aberration is still high and cannot be lower than one. Numerical value, which is the lowest color difference value that can be recognized by the human eye.

Therefore, by changing the above three conditions respectively, it is known that the improvement of color difference is not achieved under Condition 2 or Condition 3. However, under Condition 1, the method of adjusting the refractive index of the insulating layer can achieve the effect of improving the chromatic aberration.

Please refer to FIG. 6 additionally. Therefore, this creation adjusts the refractive index of the first insulating layer 31 or the second insulating layer 33 by adding the second optical adjustment layer 34, and adopts the stacked structure of several designs in the figure. Performing the color difference comparison, when in the state of design 3, the refractive index of the first insulating layer 31 is adjusted to 1.5 and the refractive index of the second insulating layer 33 is adjusted to 1.85, so that the first color difference, the second color difference, and the The difference between the third color difference is the smallest, and the visual effect of each position of the touch panel can be perceived by the human eye as the best.

In addition, please refer to FIG. 10, which is a touch panel 5 using a stacked structure for improving the visual effect of a single-layer touch sensing device. It includes a substrate 21, a first optical adjustment layer 22, a first conductive layer 23, A second conductive layer 32, a first insulating layer 31, a second insulating layer 33, and a second optical adjustment layer 34.

In the above, the first optical adjustment layer 22 is located on the substrate 21, the first conductive layer 23 is located on the first optical adjustment layer 22, the second conductive layer 32 is located on the first conductive layer 23, and the first conductive layer The insulating layer 31 is located between the first conductive layer 23 and the second conductive layer 32, has a first refractive index n1 and the first refractive index n1 is greater than 1.5. The second insulating layer 33 covers the second conductive layer 32, has a second refractive index n2 and the second refractive index n2 is greater than 1.5, and the second optical adjustment layer 34 is located on the first insulating layer 31 or the On the second insulating layer 33, by adjusting the first refractive index n1 or the second refractive index n2 to a third refractive index n3, the third refractive index n3 is between 1.8 and 2.1. The thickness of the second optical adjustment layer 34 is greater than the thickness of the first optical adjustment layer 22.

Further, the second optical adjustment layer 34 is sandwiched between the first insulating layer 31 and the first conductive layer 23 or between the first insulating layer 31 and the second conductive layer 32 or the second insulating layer 33 and the second conductive layer 32.

Furthermore, the touch panel 5 further includes an optical adhesive layer 4 disposed on the second insulating layer 33, and the second optical adjustment layer 34 is sandwiched between the second insulating layer 33 and the optical adhesive layer 4 between.

In addition, the first conductive layer 23 has a first pattern area 231 and a first blank area 232, and the second conductive layer 32 has a second pattern area 321, a dummy pattern area 323, and a second blank area 322. One of the first observation path 81 is for light passing through the second insulating layer 33, passing through the second pattern area 322 to the first blank area 232, and then reflecting out of the second insulating layer 33; a second observation path 82 for light passing through After the second insulating layer 33 passes through the dummy pattern area 323 to the first pattern area 231, it is reflected out of the second insulating layer 33; a third observation path 83 is that light passes through the second insulating layer 33 and passes through the second blank. The area 322 to the first pattern area 231 reflects out of the second insulating layer 33.

In the above, the color difference value of any two of the first observation path 81, the second observation path 82 and the third observation path 83 is less than 2.5.

In summary, the advantages of this creation are:

By fixing the film thickness of the first conductive layer 23, the thickness of the second conductive layer 32 is controlled in the range where the mutual chromatic aberration value of each inspection area is the smallest, and then the thickness of the second optical adjustment layer 34 is adjusted to adjust the thickness of the second conductive layer 32. The refractive index of the insulating layer 31 and the second insulating layer 33 is such that the chromatic aberration can be controlled below a fixed value, so as to solve the problem that the conventional indium tin oxide layer pattern will appear on the display screen, interfere with the display screen, and is not conducive to the display. The required optical quality issues.

The above are only preferred embodiments of this creation, and are not used to limit the scope of implementation of this creation. Without departing from the spirit and essence of this creation, those skilled in the art can make various corresponding actions based on this creation. Changes and deformations, but these corresponding changes and deformations should belong to the protection scope of the claims attached to this creation.

1: A stacked structure that improves the visual effect of a single-layer touch sensing device 2: Base stack structure 21: substrate 22: The first optical adjustment layer 23: The first conductive layer 231: The first pattern area 232: The first blank area 3: Adjustable stacking structure 31: The first insulating layer 32: second conductive layer 321: The second pattern area 322: second blank area 323: Dummy pattern area 33: second insulating layer 34: second optical adjustment layer 4: Optical adhesive layer 5: Touch panel 81: First Observation Path 82: Second Observation Path 83: Third Observation Path h1: first thickness h2: second thickness h3: third thickness h4: fourth thickness n1: first refractive index n2: second refractive index n3: third refractive index

FIG. 1 is a block diagram of a first preferred embodiment of a stacked structure for improving the visual effect of a single-layer touch sensing device created. FIG. 2 is a schematic diagram of the lateral structure of the first preferred embodiment of creating a stack structure of a single-layer touch sensing device. Figure 3 shows the results of optical simulation calculations for the refractive index, chromatic aberration, and reflectivity of the insulating layer. Figure 4 shows the results of optical simulation calculations of refractive index, chromatic aberration, and reflectivity with a fixed insulating layer thickness. Figure 5 is a graph of the optical simulation calculation results of the refractive index and chromatic aberration of the second conductive layer. Figure 6 is the optical simulation calculation result of the chromatic aberration adjustment of the refractive index of the first insulating layer and the second insulating layer of the stacked structure created to improve the visual effect of the single-layer touch sensor device. FIG. 7 is a block diagram of a second preferred embodiment of a stacked structure for improving the visual effect of a single-layer touch sensing device created. FIG. 8 is a schematic block diagram of a third preferred embodiment of a stacked structure created to improve the visual effect of a single-layer touch sensor device. FIG. 9 is a block diagram of a fourth preferred embodiment of a stacked structure for improving the visual effect of a single-layer touch sensing device created. FIG. 10 is a schematic diagram of the structure of the touch panel according to the preferred embodiment of the creation.

1: A stacked structure that improves the visual effect of a single-layer touch sensing device

2: Base stack structure

21: substrate

22: The first optical adjustment layer

23: The first conductive layer

3: Adjustable stacking structure

31: The first insulating layer

32: second conductive layer

33: second insulating layer

34: second optical adjustment layer

4: Optical adhesive layer

h1: first thickness

h2: second thickness

h3: third thickness

h4: fourth thickness

Claims (16)

A stack structure for improving the visual effect of a single-layer touch sensing device, which includes: A substrate stack structure, including: A substrate; A first optical adjustment layer located on the substrate; and A first conductive layer located on the first optical adjustment layer; An adjustable stack structure is located on the base stack structure, and the adjustable stack structure further includes: A first insulating layer made of a first refractive index material, the first insulating layer is located on the first conductive layer and has a first thickness; A second conductive layer, the second conductive layer is located on the first insulating layer and has a second thickness; and A second insulating layer made of a second refractive index material, the second insulating layer is located on the second conductive layer, and has a third thickness; An optical adhesive layer located on the adjustable stack structure; Wherein, the adjustable stack structure further includes a second optical adjustment layer, and the second optical adjustment layer is located outside the adjustable stack structure or one of the layers and has a fourth thickness; The two optical adjustment layers adjust the first refractive index or the second refractive index, so that when light enters the adjustable stack structure from the optical adhesive layer to the first conductive layer is reflected, until the light exits the optical adhesive layer. The color difference between the positions may be less than a value. As described in claim 1 of the scope of patent application, the stacked structure for improving the visual effect of a single-layer touch sensor device, wherein the fourth thickness is between 0.7 μm and 8 μm. As described in claim 1 of the scope of patent application, the stack structure for improving the visual effect of a single-layer touch sensing device, wherein the first insulating layer is stacked on the second optical adjustment layer or the second optical adjustment layer is stacked on the first When on an insulating layer, the first refractive index is adjusted to the third refractive index, and the third refractive index is between 1.8 and 2.1. The stack structure for improving the visual effect of a single-layer touch sensor device as described in claim 1, wherein the second insulating layer is stacked on the second optical adjustment layer or the second optical adjustment layer is stacked on the first When on the two insulating layers, the second refractive index is adjusted to the third refractive index, and the third refractive index is between 1.8 and 2.1. The stack structure for improving the visual effect of a single-layer touch sensor device as described in claim 1, wherein when the second optical adjustment layer is stacked on or under the first insulating layer, the first thickness is equal to The sum of the fourth thickness is between 3 microns and 10 microns. The first conductive layer is the stacked structure for improving the visual effect of a single-layer touch sensing device as described in claim 1, wherein the second thickness is between 20±10% nanometers and 135±10% nanometers. According to claim 1 of the scope of patent application, the stacked structure for improving the visual effect of a single-layer touch sensor device, wherein the color difference further includes a first color difference, a second color difference, and a third color difference, and the first color difference is a comparison A first observation path and a second observation path, the second color difference is to compare the first observation path and a third observation path, and the third color difference is to compare the second observation path and the third observation path. According to claim 7 of the scope of patent application, the stacked structure for improving the visual effect of a single-layer touch sensor device, wherein the first conductive layer has a first pattern area and a first blank area, and the second conductive layer has A second pattern area, a dummy pattern area, and a second blank area, the first observation path is that light passes through the second insulating layer through the second pattern area to the first blank area and then reflects out of the second insulating layer The second observation path is for light passing through the second insulating layer through the dummy pattern area to the first pattern area and then reflecting out of the second insulating layer; the third observation path is for light passing through the second insulating layer through The second blank area reflects out of the second insulating layer after reaching the first pattern area. The stack structure for improving the visual effect of a single-layer touch sensing device as described in claim 1, wherein when the second optical adjustment layer is stacked on or under the second insulating layer, the third thickness is equal to The sum of the fourth thickness is between 3 microns and 10 microns. A touch panel includes: A substrate; A first optical adjustment layer located on the substrate; A first conductive layer located on the first optical adjustment layer; A second conductive layer located on the first conductive layer; A first insulating layer, located between the first conductive layer and the second conductive layer, having a first refractive index; A second insulating layer covering the second conductive layer and having a second refractive index; and A second optical adjustment layer located on the first insulating layer or the second insulating layer; By adjusting the first refractive index or the second refractive index to a third refractive index, the third refractive index is between 1.8 and 2.1. The touch panel according to claim 10, wherein the first refractive index and the second refractive index are greater than 1.5. The touch panel according to claim 10, wherein the thickness of the second optical adjustment layer is greater than the thickness of the first optical adjustment layer. The touch panel according to claim 10, wherein the second optical adjustment layer is sandwiched between the first insulating layer and the first conductive layer or between the first insulating layer and the second conductive layer Sometimes or between the second insulating layer and the second conductive layer. The touch panel according to claim 10, wherein the touch panel further includes an optical adhesive layer disposed on the second insulating layer, and the second optical adjustment layer is sandwiched between the second insulating layer and Between the optical adhesive layer. The touch panel according to claim 10, wherein the first conductive layer has a first pattern area and a first blank area, and the second conductive layer has a second pattern area, a dummy pattern area, and A second blank area, in which a first observation path is light passing through the second insulating layer, passing through the second pattern area to the first blank area, and then reflecting out of the second insulating layer; a second observation path is light passing through The second insulating layer passes through the dummy pattern area to the first pattern area and then reflects out of the second insulating layer; a third observation path is that light passes through the second insulating layer and passes through the second blank area to the first pattern After the zone, it reflects out of the second insulating layer. The touch panel according to claim 15, wherein the color difference value of any two of the first observation path, the second observation path, and the third observation path is less than 2.5.

Images