CN105005402A - Touch panel - Google Patents

Abstract

The present invention discloses a touch panel, comprising a protective cover plate and a display element under the protective cover plate, wherein a touch sensing layer is arranged in an active area of the touch panel and is between the protective cover plate and the display element, a decorative layer is arranged in a peripheral area of the touch panel and is between the protective cover plate and the display element, wherein the peripheral area surrounds the active area, and the touch panel further comprises a dielectric material layer between the protective cover plate and the display element, wherein the reflectivity difference between the active area and the peripheral area is between 0 and 0.5.

Description

touch panel

technical field

The invention relates to a touch panel, in particular to a structural design for adjusting the appearance color of the touch panel and a manufacturing method thereof.

Background technique

With the development of the electronic industry, in recent years, various digital products, such as mobile phones, tablet computers, digital cameras and other electronic products have the demand for touch function. Using touch panels in these electronic products can provide more convenient and fast Operation method.

Touch panels can be roughly divided into resistive touch and capacitive touch technologies. At present, capacitive touch is the main technology. Capacitive touch technology usually forms a touch sensing element by patterning a transparent electrode layer. Due to the limitations of the coating temperature and the design of the integrated circuit, the transparent electrode layer requires a higher film thickness to meet the resistance requirements of the touch sensing element. The active area of the touch panel will cause a visible phenomenon, resulting in a poor visual effect of the active area of the touch panel, which affects the aesthetics of the touch panel. Therefore, the current improvement of the visual effect of the touch panel is mainly aimed at improving the active area (active area) forming the touch sensing element.

Contents of the invention

In order to solve the above-mentioned problems, the present invention provides a structural design and a manufacturing method of a touch panel. Using the principle of optical interference, a dielectric material layer is used to adjust the appearance color of the active area and the peripheral area of the touch panel to allow light to enter the touch panel. Finally, the spectrum of the reflected light reflected from the active area and the peripheral area is similar, so that there is no color difference between the active area and the peripheral area of the touch panel in appearance and visual effect, thereby achieving the effect of improving the appearance and visual effect of the touch panel.

In some embodiments of the present invention, a touch panel is provided, which includes: a protective cover and a display element arranged under the protective cover, the touch sensing layer is arranged in the active area of the touch panel, and is interposed between the protective cover Between the board and the display element, the decoration layer is arranged on the peripheral area of the touch panel, and between the protective cover and the display element, wherein the peripheral area surrounds the active area, and the dielectric material layer is interposed between the protective cover and the display element , wherein the reflectance difference between the active area and the peripheral area is about 0 to 0.5.

Description of drawings

1 shows a schematic plan view of a touch panel without a dielectric material layer of the present invention;

Fig. 2 shows the reflected light spectrum of the peripheral area and the active area of the touch panel without the dielectric material layer of the present invention;

Fig. 3 shows some embodiments of the present invention, a schematic plan view of a touch panel;

4 shows an embodiment of the present invention, the reflected light spectrum of the peripheral area and the active area of the touch panel with a dielectric material layer;

Figures 5-10 show some embodiments of the present invention, along the section line 3-3' of Figure 3, a schematic cross-sectional view of the touch panel; and

11-12 show other embodiments of the present invention, schematic cross-sectional schematic diagrams of touch panels.

Symbol Description

10, 100, 200, 300 ~ touch panel;

10A, 100A, 200A, 300A～active zone;

10P, 100P, 200P, 300P～surrounding area;

101～protective cover plate;

101B～protect the inner surface of the cover plate;

101F～protect the outer surface of the cover plate;

102～glass substrate;

103, 103P, 103A～dielectric material layer;

105～decorative layer;

107～optical glue;

109 ~ upper polarizer;

111～touch sensing layer;

113～display components;

113U～the upper substrate of the display element;

113L～the lower substrate of the display element;

113D～display material layer;

115 ~ lower polarizer.

Detailed ways

The structural design and manufacturing method of some embodiments of the touch panel of the present invention are described in detail below. However, it can be understood that the inventive concept provided by the present invention can be implemented in a wide variety of backgrounds. The specific implementation discussed here The examples are only used to illustrate specific ways of making and using some embodiments of the present invention, and are not intended to limit the scope of the present invention.

As shown in FIG. 1 , the touch panel 10 can be divided into an active area 10A and a peripheral area 10P surrounding the active area 10A. The touch sensing element is formed in the active area 10A, and the peripheral area 10P forms a decorative layer with a light-shielding effect. , FIG. 1 shows a schematic plan view of a touch panel 10 without the dielectric material layer of the present invention. Since the conductive material forming the touch sensing element is different from the light-shielding material forming the decoration layer, when the active area of the touch panel is not In the state of displaying images, the peripheral area 10P and the active area 10A of the touch panel 10 without the dielectric material layer of the present invention will have color differences in appearance and visual effects. For example, the peripheral area 10P uses a black light-shielding material, while The active region 10A appears dark blue due to the conductive material.

FIG. 2 shows the spectrum of reflected light reflected from the peripheral region 10P and the active region 10A when light enters the peripheral region 10P and the active region 10A of the touch panel 10 without the dielectric material layer of the present invention, as shown in FIG. 2 , the reflected light spectrum of the peripheral area 10P of the touch panel 10 without the dielectric material layer of the present invention is inconsistent with that of the active area 10A. The maximum value is about 1.5, and the average value is about 0.8, which proves that the peripheral region 10P and the active region 10A of the touch panel 10 without the dielectric material layer of the present invention have a color difference in visual appearance.

In particular, when the conductive material layer forming the touch sensing element needs a higher film thickness to meet the resistance value requirements of the conductive material layer due to the limitation of coating temperature and the limitation of integrated circuit design, the conductive material with high film thickness layer will cause the color difference between the peripheral area 10P and the active area 10A of the touch panel 10 to be more obvious, so that the appearance and visual effect of the touch panel 10 without the dielectric material layer of the present invention is not good.

FIG. 3 shows a schematic plan view of a touch panel 100 with a dielectric material layer adjusting the colors of the peripheral region 100P and the active region 100A according to some embodiments of the present invention. According to some embodiments of the present invention, the appearance color of the active area 100A and the peripheral area 100P of the touch panel 100 can be adjusted by using the principle of optical interference, and the appearance color of the active area 100A and the peripheral area 100P of the touch panel 100 can be adjusted, so that after the light enters the touch panel 100, the light from the active area 100A and the peripheral area 100P can be adjusted. The spectrum of the reflected light reflected by the peripheral area 100P is similar.

As shown in FIG. 4 , according to some embodiments of the present invention, in a touch panel 100 with a dielectric material layer to adjust the colors of the peripheral region 100P and the active region 100A, the reflected light spectra of the peripheral region 100P and the active region 100A are similar, and in In the visible light wavelength range of 350-750 nm, the reflectivity difference (ΔR) between the peripheral region 100P and the active region 100A is at most about 0.4, and the average is about 0.3.

In addition, the chromaticity coordinates of the peripheral region 100P and the active region 100A of the touch panel 100 in some embodiments of the present invention are measured by a chromaticity meter, and the chromaticity difference between the peripheral region 100P and the active region 100A is calculated through the chromaticity coordinates The value (ΔE) is less than about 5, which proves that the color of the peripheral region 100P of the touch panel 100 having the dielectric material layer of the present invention is similar to that of the active region 100A, making it difficult for users to distinguish the active region 100A of the touch panel 100 The separation line between the peripheral area 100P can improve the appearance and visual effect of the touch panel, so as to beautify the electronic products containing the touch panel.

5-10 show some embodiments of the present invention, along the section line 3-3' in FIG. A touch on display (TOD) type in which the sensing element (touch sensor) is formed on the display element (display) is described as an example, however, the concept of the present invention can also be applied to other types of touch panels For example, the touch sensor (touch sensor) is formed on the protective cover (cover lens) of the touch panel type (window integrated sensor (WIS) type), or the touch sensor is formed between the protective cover The touch panel type (GG type) on the glass substrate between the display element and the like.

As shown in FIG. 5 , the touch panel 100 includes a protective cover 101. According to an embodiment of the present invention, a dielectric material layer 103 for adjusting the colors of the peripheral region 100P and the active region 100A is formed on the inner surface 101B of the protective cover 101. The outer surface 101F of the protective cover 101 serves as the touch surface of the touch panel 100 , and the protective cover 101 may be a glass substrate or a flexible plastic substrate. In this embodiment, the dielectric material layer 103 is disposed on the peripheral region 100P and the active region 100A of the touch panel 100 , after the dielectric material layer 103 is formed, a decoration layer 105 is formed on the peripheral region 100P to protect the cover plate 101 as a Referring to, viewed from a downward direction, the decoration layer 105 is formed above the dielectric material layer 103 of the peripheral region 100P. The material of the decorative layer 105 has a light-shielding effect. For example, it can be black photoresist or ink material of other colors. It can be used to make the decorative layer through coating and photolithography processes, or it can be printed Production process, making a decorative layer with colored inks.

The touch panel 100 further includes a display element 113 disposed under the protective cover 101 , and the display element 113 can be bonded to the protective cover 101 via an optical clear adhesive (OCA) 107 . In some embodiments, the display element 113 is, for example, a liquid crystal display panel (liquid crystal display; LCD), and in other embodiments, the display element 113 may be another type of display panel, such as an OLED display panel.

In this embodiment, the touch sensing layer 111 of the touch panel 100 is formed on the outer surface of the upper substrate 113U of the display element 113 facing the protective cover 101. Taking a liquid crystal display panel as an example, the upper substrate of the display element 113 113U is, for example, a color filter substrate, the lower substrate 113L of the display element 113 is, for example, a thin film transistor substrate, and the display material layer 113D interposed between the upper substrate 113U and the lower substrate 113L is, for example, a liquid crystal layer. In addition, the upper polarizer 109 for the liquid crystal display panel is disposed above the touch sensing layer 111 , and the lower polarizer 115 is disposed below the lower substrate 113L of the display element 113 .

In some embodiments, the touch sensing element of the touch sensing layer 111 is, for example, a capacitive touch sensing element, which includes one or two layers of electrode patterns in the X direction and the Y direction, and these electrode patterns can be passed through The film deposition, photolithography and etching processes are made of transparent conductive materials, such as indium tin oxide (ITO) or indium zinc oxide (IZO).

According to some embodiments of the present invention, the material of the dielectric material layer 103 may be an inorganic material with a refractive index between about 1.4 and 2.4, such as niobium oxide (Nb2O5), silicon dioxide (SiO2), aluminum oxide (Al2O3 ), silicon oxynitride (SiOxNy), or a combination of the aforementioned materials. In addition, the material of the dielectric material layer 103 can also be an organic material with a refractive index between about 1.4 and 2.4, such as a polymer material containing high refractive index particles, such as a phenolic resin (phenolic resins) or Acrylic resin (acrylic resins). According to some embodiments of the present invention, the thickness of the dielectric material layer 103 is between about 10 nm and 5 μm, the dielectric material layer 103 may be a layered structure of one or more layers, and the dielectric material layer 103 may be formed from the aforementioned The dielectric material layer 103 can be formed by a coating process, a deposition process or a combination of the foregoing.

According to some embodiments of the present invention, the refractive index and thickness of the dielectric material layer 103 can be adjusted, and after light enters the touch panel 100 using the principle of optical interference, the spectrum of the reflected light reflected from the active area 100A and the peripheral area 100P is similar. so that the reflectance difference (ΔR) between the active region 100A and the peripheral region 100P is between about 0 and 0.5, and the chromaticity difference (ΔE) between the active region 100A and the peripheral region 100P is between about 0 and 5, The color of the active area 100A and the peripheral area 100P of the touch panel 100 is made to be similar to make it difficult for the user to distinguish the dividing line between the active area 100A and the peripheral area 100P, thereby improving the appearance and visual effect of the touch panel. In addition, the dielectric material layer 103 can be used to adjust the colors of the active area 100A and the peripheral area 100P according to the requirement for the appearance color of the touch panel, so that the touch panel has different colors, thereby beautifying the appearance of the touch panel.

Some embodiments of the present invention are listed below. Taking the structure of the touch panel 100 in FIG. The color of the region 100P, the reflectance R and chromaticity coordinates L, a*, b* of the active region 100A and the peripheral region 100P are obtained by measuring the touch panels of these embodiments, and the calculated active region 100A and the peripheral region The reflectance difference (ΔR) and color difference (ΔE) of 100P, and the reflectance difference and color difference of the active area and the peripheral area of the touch panel without the dielectric material layer of the present invention are also listed.

Table 1. The reflectance difference and color difference of the active area and the peripheral area of the touch panel of the comparative example and various embodiments

From the results in Table 1, it can be seen that compared with the reflectance difference (ΔR) between the active area and the peripheral area of the touch panel without the dielectric material layer of the present invention is -0.62, the color difference value (ΔE) is 7.2. According to some embodiments of the present invention, the refractive index is between about 1.4 and about 2.4, and the thickness range is about to about In between, one or more stacked dielectric material layers are used to adjust the color of the active area and the peripheral area of the touch panel, and the reflectance difference (ΔR) between the active area and the peripheral area obtained is less than 0.04, and the color difference The value (ΔE) is less than about 4, which shows that the reflectance difference (ΔR) and color difference (ΔE) between the active area and the peripheral area of the touch panel of the embodiment are much smaller than the reflectance difference (ΔR ) and the color difference value (ΔE), which means that the design of the dielectric material layer according to the present invention can make the colors of the active area and the peripheral area of the touch panel similar, so as to achieve the effect of beautifying the appearance of the touch panel.

In various embodiments described below, the design of the dielectric material layer is used to adjust the reflected light spectrum of the active area of the touch panel to be similar to the reflected light spectrum of the peripheral area, or the dielectric material layer is used to adjust the active area at the same time. The reflected light spectrum of the peripheral region and the peripheral region is similar, or the design of the dielectric material layer is used to adjust the reflected light spectrum of the peripheral region to make it similar to the reflected light spectrum of the active region. These methods can make the active region and the active region The reflectance difference (ΔR) of the peripheral area is between about 0 and 0.5, and the color difference (ΔE) is between about 0 and 5, so that the color of the active area is similar to the color of the peripheral area, achieving Improve the effect of the appearance visual effect of the touch panel.

Referring to FIG. 6 , it shows a schematic cross-sectional view of the touch panel 100 along the section line 3-3' in FIG. 3 according to an embodiment of the present invention. The difference between FIG. 6 and FIG. 5 is that the dielectric material layer 103 of the touch panel shown in FIG. Between 109. In the embodiment of FIG. 6, after the touch sensing layer 111 is formed on the outer surface of the upper substrate of the display element 113 facing the protective cover 101, a dielectric material layer 103 is formed on the touch sensing layer 111. The material, refractive index and thickness of the electrical material layer 103 can be as described above, and will not be repeated here. In this embodiment, the dielectric material layer 103 is used to adjust the reflected light spectrum of the active region 100A, so that the reflected light spectrum of the active region 100A is similar to the reflected light spectrum of the peripheral region 100P, so that the color of the active region 100A is similar to that of the peripheral region 100P The color can achieve the effect of improving the visual effect of the appearance of the touch panel.

FIG. 7 shows a schematic cross-sectional view of the touch panel 100 along the section line 3-3' in FIG. 3 according to an embodiment of the present invention. The difference between FIG. 7 and FIG. 6 is that the dielectric material layer 103 of the touch panel in FIG. 7 is disposed between the display element 113 and the touch sensing layer 111 . In this embodiment, the dielectric material layer 103 is first formed on the outer surface of the upper substrate of the display element 113 facing the protective cover 101 , and then the touch sensing layer 111 is formed on the dielectric material layer 103 . The material, refractive index and thickness of the material layer 103 may be as described above. The dielectric material layer 103 of the touch panel of FIG. 7 is only provided on the active area 100A of the touch panel 100, and the dielectric material layer 103 is used to adjust the reflected light spectrum of the active area 100A, so that the reflected light spectrum of the active area 100A is consistent with the surrounding area. The reflected light spectrum of the area 100P is similar, so that the color of the active area 100A is similar to the color of the peripheral area 100P, so as to improve the appearance and visual effect of the touch panel.

FIG. 8 shows a schematic cross-sectional view of the touch panel 100 along the section line 3-3' in FIG. 3 according to an embodiment of the present invention. In this embodiment, viewed from the direction in which the protective cover 101 is downward, the decorative layer 105 is formed on the inner surface of the protective cover 101 behind the peripheral region 100P, and forms an intermediate layer on the inner surface of the protective cover 101. The dielectric material layer 103, the dielectric material layer 103 is disposed on the active region 100A and the peripheral region 100P, the dielectric material layer 103 located in the active region 100A is directly formed on the inner surface of the protective cover 101, and the dielectric material layer 103 located in the peripheral region 100P The electrical material layer 103 covers the decoration layer 105 , and the material, refractive index and thickness of the dielectric material layer 103 can be as mentioned above. In this embodiment, the dielectric material layer 103 is used to adjust the reflected light spectrum of the active region 100A, so that the reflected light spectrum of the active region 100A and the peripheral region 100P are similar, so that the colors of the active region 100A and the peripheral region 100P are similar to achieve improved The effect of visual effects on the appearance of the touch panel.

In this embodiment, the touch sensing layer 111 is formed on the outer surface of the upper substrate of the display element 113 facing the protective cover 101 , and the touch sensing layer 111 is interposed between the upper polarizer 109 and the display element 113 , the upper polarizer 109 is bonded to the dielectric material layer 103 via the optical adhesive 107 to form the structure of the touch panel 100 in FIG. 8 .

FIG. 9 shows a schematic cross-sectional view of the touch panel 100 along the section line 3-3' in FIG. 3 according to an embodiment of the present invention. In this embodiment, the dielectric material layer 103 is only disposed on the peripheral region 100P of the touch panel 100 , and the material, refractive index and thickness of the dielectric material layer 103 can be as mentioned above. In this embodiment, the dielectric material layer 103 is first formed on the peripheral area 100P on the inner surface of the protective cover 101, and then, viewed from the direction that the protective cover 101 is below, a decoration is formed on the dielectric material layer 103. Layer 105. In this embodiment, the dielectric material layer 103 is used to adjust the reflected light spectrum of the peripheral region 100P so that it is similar to the reflected light spectrum of the active region 100A, so that the color of the peripheral region 100P is similar to the color of the active region 100A to achieve improved The effect of visual effects on the appearance of the touch panel.

In this embodiment, the touch sensing layer 111 is formed on the outer surface of the upper substrate of the display element 113 facing the protective cover 101 , and the touch sensing layer 111 is interposed between the upper polarizer 109 and the display element 113 , the upper polarizer 109 is bonded to the protective cover 101 via the optical glue 107 to form the structure of the touch panel 100 in FIG. 9 .

FIG. 10 shows a schematic cross-sectional view of the touch panel 100 along the section line 3-3' in FIG. 3 according to an embodiment of the present invention. The difference between FIG. 10 and FIG. 9 is that in addition to the dielectric material layer 103P disposed in the peripheral region 100P, the touch panel 100 in FIG. 10 also includes a dielectric material layer 103A disposed in the active region 100A, the dielectric material layer 103P and The material, refractive index and thickness range of the dielectric material layer 103A can be as mentioned above.

In this embodiment, the dielectric material layer 103A located in the active area 100A is disposed between the touch sensing layer 111 and the upper polarizer 109 , and the dielectric material layer 103P located in the peripheral area 100P is disposed on the protective cover 101 and the decoration layer 105. In this embodiment, after the touch sensing layer 111 is formed on the outer surface of the upper substrate of the display element 113 facing the protective cover 101, the dielectric material layer 103A is formed on the touch sensing layer 111, and then A polarizer 109 is pasted on the dielectric material layer 103A.

In other embodiments, the dielectric material layer 103A located in the active region 100A can be disposed between the touch sensing layer 111 and the display element 113 , in this embodiment, the dielectric material layer 103A is first formed on the display element 113 On the outer surface of the upper substrate facing the protective cover 101 , the touch sensing layer 111 is formed on the dielectric material layer 103A, and then the upper polarizer 109 is bonded.

In these embodiments, the dielectric material layer 103P is used to adjust the reflected light spectrum of the peripheral region 100P, and the dielectric material layer 103A is used to adjust the reflected light spectrum of the active region 100, so that the reflected light of the active region 100A and the peripheral region 100P The frequency spectrum is similar, so that the color of the peripheral area 100P is similar to that of the active area 100A, so as to improve the appearance and visual effect of the touch panel.

FIG. 11 shows a schematic cross-sectional view of a touch panel 200 according to some embodiments of the present invention. The touch panel 200 in FIG. 11 belongs to the touch panel type (WIS type touch panel) in which touch sensing elements are formed on a protective cover. , in this embodiment, the dielectric material layer 103 for adjusting the color of the peripheral region 200P and the active region 200A of the touch panel 200 is formed on the inner surface 101B of the protective cover 101, the material of the dielectric material layer 103, the refractive index and thickness can be as previously described. In some embodiments, the dielectric material layer 103 can be disposed on the peripheral region 200P and the active region 200A at the same time. In other embodiments, the dielectric material layer 103 may only be disposed on the active region 200A or the peripheral region 200P.

In the embodiment of FIG. 11 , viewed from the direction in which the protective cover 101 is below, the decoration layer 105 is formed above the dielectric material layer 103 and located in the peripheral region 200P, and the touch sensing layer 111 is also formed on the dielectric material The layer 103 is above and located in the active region 200A, so that the touch sensing element is integrated on the protective cover 101 . In this embodiment, the display element 113 is, for example, a liquid crystal display panel, and upper and lower polarizers 109 and 115 are respectively arranged on the upper and lower surfaces of the display element 113, and the upper polarizer 109 and the formed polarizer can be formed using optical glue (not shown). The touch sensing layer 111 on the protective cover 101 is bonded to form the touch panel 200 of FIG. 11 .

In this embodiment, the dielectric material layer 103 can simultaneously adjust the reflected light spectrum of the active region 200A and the peripheral region 200P, so that the reflected light spectrum of the active region 200A and the peripheral region 200P are similar, so that the colors of the active region 200A and the peripheral region 200P Similar to achieve the effect of improving the visual effect of the appearance of the touch panel.

In other embodiments, the dielectric material layer 103 can also be arranged in other ways as mentioned above, for example, the dielectric material layer 103 is only arranged on the active region 200A or the peripheral region 200P, so that the reflection of the active region 200A or the peripheral region 200P The light spectrum is similar to the reflected light spectrum of the other area, so that the colors of the active area 200A and the peripheral area 200P are similar, so as to improve the appearance and visual effect of the touch panel.

FIG. 12 shows a schematic cross-sectional view of a touch panel 300 according to some embodiments of the present invention. The touch panel 300 in FIG. 12 belongs to another touch sensing element formed between the protective cover 101 and the display element 113. The touch panel type (GG type touch panel) on the glass substrate 102, in this embodiment, the dielectric material layer 103 that adjusts the color of the peripheral area 300P and the active area 300A of the touch panel 300 is formed on the protective cover 101 On the inner surface 101B, the material, refractive index and thickness of the dielectric material layer 103 can be as described above. In some embodiments, the dielectric material layer 103 may be disposed on the peripheral region 300P and the active region 300A at the same time. In other embodiments, the dielectric material layer 103 may only be disposed on the active region 300A or the peripheral region 300P.

In the embodiment of FIG. 12 , another glass substrate 102 is disposed between the protective cover 101 and the display element 113 , and the touch sensing layer 111 is formed on the surface 102U of the glass substrate 102 facing the protective cover 101 . In some embodiments, the decoration layer 105 may be formed on the surface 102U of the glass substrate 102 and located in the peripheral region 300P. In other embodiments, the decoration layer 105 may be formed on the dielectric material layer 103 and located in the peripheral region 300P as viewed from a direction in which the protective cover 101 is below.

In this embodiment, the touch sensing layer 111 and the dielectric material layer 103 may be bonded using optical glue (not shown). The display element 113 is, for example, a liquid crystal display panel, with upper and lower polarizers 109 and 115 respectively on the upper and lower surfaces of the display element 113, and the upper polarizer 109 can be bonded to the glass substrate 102 with optical glue (not shown) to form a pattern. 12 touch panel 300 .

In this embodiment, the dielectric material layer 103 can simultaneously adjust the reflected light spectra of the active region 300A and the peripheral region 300P, so that the reflected light spectra of the active region 300A and the peripheral region 300P are similar, so that the colors of the active region 300A and the peripheral region 300P Similar to achieve the effect of improving the visual effect of the appearance of the touch panel.

In other embodiments, the dielectric material layer 103 can also be arranged in other ways as mentioned above, for example, the dielectric material layer 103 is only arranged on the active region 300A or the peripheral region 300P, so that the reflection of the active region 300A or the peripheral region 300P The light spectrum is similar to the reflected light spectrum of the other area, so that the colors of the active area 300A and the peripheral area 300P are similar, thereby improving the appearance and visual effect of the touch panel.

According to some embodiments of the present invention, using the principle of optical interference, a dielectric material layer is used to adjust the reflected light spectrum of the active area and the peripheral area of the touch panel, so that the reflected light spectrum of the active area and the peripheral area are similar. The material of the electrical material layer, adjusting the refractive index and thickness of the dielectric material layer, etc., make the reflected light spectrum of the active area and the peripheral area similar, so that the color of the active area and the peripheral area is similar, so as to improve the appearance and visual effect of the touch panel function to beautify the appearance of the touch panel.

Although the present invention has been disclosed in conjunction with the above preferred embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in this technical field should understand that some changes and modifications can be made without departing from the spirit and scope of the present invention. retouch. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims (10)

1. A touch panel, comprising: protective cover; The display element is arranged under the protective cover; a touch sensing layer disposed on an active area of the touch panel and between the protective cover and the display element; a decoration layer disposed on a peripheral area of the touch panel and between the protective cover and the display element, wherein the peripheral area surrounds the active area; and The dielectric material layer is between the protective cover plate and the display element, wherein the reflectance difference between the active area and the peripheral area is between 0 and 0.5. 2. The touch panel as claimed in claim 1, wherein the color difference between the active area and the peripheral area is between 0-5. 3. The touch panel as claimed in claim 1, wherein the dielectric material layer is interposed between the touch sensing layer and the display element. 4. The touch panel as claimed in claim 1, wherein the dielectric material layer is interposed between the protective cover and the touch sensing layer. 5. The touch panel as claimed in claim 4, wherein the dielectric material layer is disposed on the peripheral area of the touch panel. 6. The touch panel as claimed in claim 5, wherein the dielectric material layer is also disposed on the active area of the touch panel. 7. The touch panel according to claim 6, wherein the dielectric material layer is formed on an inner surface of the protective cover, and the dielectric material layer in the peripheral region is between the protective cover and the decoration between layers. 8. The touch panel according to claim 6, wherein the dielectric material layer of the active region is formed on an inner surface of the protective cover, and the decoration layer is interposed between the protective cover and the peripheral region between the dielectric material layers. 9. The touch panel as claimed in claim 1, wherein the touch sensing layer is formed on a surface of an upper substrate of the display element facing the protective cover. 10. The touch panel according to claim 1, wherein the material of the dielectric material layer is selected from the group consisting of inorganic materials and organic materials with a refractive index between 1.4 and 2.4, and the dielectric material layer The material layer includes a laminated structure of one or more layers.