TWI605367B - Touch display device and touch panel - Google Patents

Description

Touch display device and touch panel

The present invention relates to a touch display device and a touch panel, and more particularly to a touch display device and a touch panel capable of reducing short-wave blue light.

With the continuous advancement of technology, various information devices are constantly being updated, especially smart phones, tablets, ultra-thin notebooks, etc. In addition to keyboard or mouse input or manipulation, touch technology is used to control information. The device is a fairly intuitive and popular way to control it. Since the touch display device has a user-friendly and intuitive input operation interface, the user of any age can directly select or manipulate the information device with a finger or a stylus. Therefore, the touch display device is already in modern life. One of the indispensable tools.

The study found that the light emitted by the touch screen of smart phones, tablets, ultra-thin notebooks, etc. contains a lot of blue light, which makes the screen whiter and brighter. However, blue light makes the eyes dry. Fatigue or affects sleep, and even causes eyeball lesions, especially short-wave blue light, which has a short wavelength and is close to ultraviolet light (UV). It can penetrate the lens of the eye and reach the retina, causing the retina to generate free radicals, which can cause the retina. The decline of pigment epithelial cells, the decline of epithelial cells can lead to the lack of nutrients in light-sensitive cells, causing visual impairment and irreversible. Therefore, how to directly reduce the damage of short-wave blue light to the human eye in the touch display device has been one of the focuses of the industry research.

The invention provides a touch display device and a touch panel. The touch display device and the touch panel of the invention can effectively intercept the short-wave blue light and ultraviolet light emitted by the display screen, and ensure that the display color is not distorted.

The present invention provides a touch display device including a display panel and a touch panel. The touch panel is opposite to the display panel, and the touch panel includes a protection substrate and an anti-blue Light layer and a touch electrode layer. The anti-blue layer is disposed between the protection substrate and the display panel, and the anti-blue layer is formed by laminating a plurality of pairs of the first material layer and the second material, wherein the refractive index of the first material layer is greater than the refractive index of the second material layer. And the thickness of the first material layer is between 20 nm and 50 nm, and the thickness of the second material layer is between 20 nm and 70 nm. The touch electrode layer is disposed between the protection substrate and the display panel, and is disposed to overlap the anti-blue light layer.

The touch panel includes a protective substrate, a blue light resistant layer and a touch electrode layer. The anti-blue layer is disposed on the protective substrate, and the anti-blue layer is formed by laminating a plurality of pairs of the first material layer and the second material, the refractive index of the first material layer is greater than the refractive index of the second material layer, and the first material layer The thickness is between 20 nm and 50 nm, and the thickness of the second material layer is between 20 nm and 70 nm. The touch electrode layer is disposed on the protective substrate and disposed to overlap the blue light resistant layer.

In an embodiment, the first material layer has a refractive index between 1.6 and 2.8.

In an embodiment, the second material layer has a refractive index between 1.3 and 1.6.

In one embodiment, the material of the first material layer comprises trititanium pentoxide, tantalum pentoxide, tantalum nitride, or a combination thereof.

In an embodiment, the material of the second material layer comprises ceria, magnesium difluoride, or a combination thereof.

In one embodiment, the blue light resistant layer is at least 12 layers of the first material layer and the second material.

In one embodiment, the anti-blue layer is disposed on a surface of the protection substrate facing the display panel, and the touch electrode layer is disposed on a surface of the display panel facing the protection substrate.

In an embodiment, an adhesive layer is further disposed between the anti-blue layer and the touch electrode layer or between the touch electrode layer and the display panel.

In one embodiment, the touch electrode layer is disposed on a surface of the protection substrate facing the display panel, and the anti-blue layer is disposed on a surface of the display panel facing the protection substrate.

In an embodiment, an adhesive layer is further disposed between the touch electrode layer and the blue light resistant layer or between the blue light resistant layer and the display panel.

In an embodiment, the blue light resistant layer is disposed on a surface of the protective substrate.

In an embodiment, the touch electrode layer is disposed on a surface of the protection substrate.

As described above, in the touch display device and the touch panel of the present invention, a plurality of pairs of the first material layer and the second material layer are disposed between the protective substrate and the display panel, and the first material layer is The refractive index is greater than the refractive index of the second material layer, and the thickness of the first material layer is between 20 nm and 50 nm, and the thickness of the second material layer is between 20 nm and 70 nm. Thereby, the touch display device and the touch panel of the present invention can effectively intercept the short-wave blue light and ultraviolet light emitted by the display screen, and ensure that the display color is not distorted.

1, 1a‧‧‧ touch display device

11‧‧‧ display panel

111‧‧‧Upper surface

12‧‧‧Touch panel

121‧‧‧Protective substrate

1211‧‧‧ first surface

1212‧‧‧ second surface

122‧‧‧Anti-blue layer

1221‧‧‧First material layer

1222‧‧‧Second material layer

123‧‧‧Touch electrode layer

124‧‧‧Adhesive layer

N‧‧‧Logarithm of the first material layer and the second material layer

FIG. 1A is a schematic diagram of a touch display device according to a preferred embodiment of the present invention.

FIG. 1B and FIG. 1C are different schematic diagrams of the anti-blue layer of the touch display device, respectively.

2 is a schematic diagram of a touch display device according to different embodiments of the present invention.

Figure 3 is a schematic diagram showing the spectrum of light passing through the blue light resistant layer of the present invention.

The touch display device and the touch panel according to the preferred embodiment of the present invention will be described with reference to the related drawings, wherein the same elements will be described with the same reference numerals. In addition, the illustrations of all the embodiments of the present invention are merely illustrative and do not represent true dimensions and proportions. In addition, the orientations "upper" and "lower" as used in the following embodiments are merely used to indicate relative positional relationships. Furthermore, an element that is "on", "above", "in" or "in" or "in" or "an" or "an" There are other additional components between one component that make one component in direct contact with the other.

1A and FIG. 1B, FIG. 1A is a schematic diagram of a touch display device 1 according to a preferred embodiment of the present invention, and FIG. 1B is a schematic diagram of a blue light-resistant layer 122 of the touch display device 1.

The touch display device 1 includes a display panel 11 and a touch panel 12 . The touch panel 12 is disposed opposite to the display panel 11 . The touch display device 1 can be, for example but not limited to, a smart phone, a tablet, an ultra-thin notebook, a wearable device, or other touch devices, and is not limited thereto.

The display panel 11 may be a liquid crystal display panel (LCD), an organic light emitting diode display panel (OLED), or a light emitting diode display panel (LED), and is not limited. When the display panel 11 is a liquid crystal display panel, the touch display device 1 further includes a backlight module (not shown), and the backlight module can emit light to the display panel 11 to display the image on the display panel 11.

The touch panel 12 includes a protective substrate 121 , a blue light resistant layer 122 , and a touch electrode layer 123 . The protective substrate 121 has a first surface 1211 facing the display panel 11 . In addition, in the protective substrate 121, the other second surface 1212 opposite to the first surface 1211 is a touch surface, which is also a surface on which a user views an image. Here, the protective substrate 121 is, for example but not limited to, a cover glass (C/G) to protect the blue light-resistant layer 122, the touch electrode layer 123, and the display panel 11 from moisture or foreign matter.

The anti-blue light layer 122 is disposed between the protective substrate 121 and the display panel 11. The blue light-resistant layer 122 of the present embodiment is disposed on the first surface 1211 of the protective substrate 121 facing the display panel 11. The anti-blue light layer 122 is formed by stacking a plurality of pairs of first material layers 1221 and second material layers 1222. In other words, stacking a layer of first material layer 1221 with a layer of second material layer 1222 may be referred to as a pair. As shown in FIG. 1B, the blue light resistant layer 122 may be formed by stacking N pairs of first material layers 1221 and second material layers 1222. Among them, in order to effectively intercept short-wave blue light and UV light, the value of N is at least 12, that is, the total number of layers is 24 layers. On the other hand, in practical design, since the number of constituent layers of the anti-blue light layer 122 reaches a certain amount, the improvement of the optical effect is limited, and the thickness variation of the embodiment is applied according to the thickness of the touch display device 1, N The value is up to 30, which is 60 layers. In addition, the blue light-resistant layer 122 of the present embodiment is sequentially composed of a first material layer 1221, a second material layer 1222, a first material layer 1221, a second material layer 1222, ..., a first material layer 1221, from bottom to top. The first material layer 1221 and the second material layer 1222 are sequentially staggered and stacked, and the anti-blue light layer 122 faces the touch electrode layer 123 with the first material layer 1221.

In another embodiment, as shown in FIG. 1C, the blue light-resistant layer 122 can also be a second material layer 1222, a first material layer 1221, a second material layer 1222, a first material layer 1221, and the like. a second material layer 1222, a first material layer 1221, and a second material layer 1222. An additional layer of the second material layer 1222 and the plurality of pairs of the first material layer 1221 and the second material layer 1222 are sequentially staggered, and the topmost layer and the bottom layer are the second material layer 1222, which is resistant to blue. The light layer 122 faces the touch electrode layer 123 with the second material layer 1222. It is added that the upper side in the viewing angle based on FIG. 1C is the side closer to the user's viewing, and the first material layer 1221 is assumed to be compared with the refractive indices of the first material layer 1221 and the second material layer 1222. It belongs to the high refractive index layer, and the second material layer 1222 belongs to the low refractive index layer. In order to further avoid the optical visual effect of the blue light resistant layer 122, the stacked state of the low refractive index layer and the high refractive index layer of FIG. 1C is first. In the sample, the second layer of the second material layer 1222 having a low refractive index may be further added to the upper layer. Thus, the total number of layers in the embodiment of FIG. 1C is 25 layers, as exemplified by the minimum number of layers of the anti-blue layer 122. .

The material of the first material layer 1221 may comprise titanium trioxide (Ti ₃ O ₅ ), niobium pentoxide (Nb ₂ O ₅ ) or tantalum nitride (Si ₃ N ₄ ), or a combination thereof, and the second material layer The material of 1222 may comprise cerium oxide (SiO ₂ ) or magnesium difluoride (MgF ₂ ), or a combination thereof, and is not limited. In addition, the thickness of the first material layer 1221 may be between 20 nm and 50 nm (20 nm ≦ thickness ≦ 50 nm), and the thickness of the second material layer 1222 may be between 20 nm and 70 nm ( 20 nm ≦ thickness ≦ 70 nm), wherein the thickness of each of the first material layer 1221 or each of the second material layer 1222 in the blue light resistant layer 122 may vary depending on the actual design, and is not limited to the same thickness. In this regard, the refractive index of the first material layer 1221 may be between 1.6 and 2.8 (1.6 < refractive index ≦ 2.8), and the refractive index of the second material layer 1222 may be between 1.3 by material selection and thickness design. Between 1.6 and 1.3 (1.3 ≦ refractive index ≦ 1.6), and the refractive index of the first material layer 1221 is greater than the refractive index of the second material layer 1222. In addition, the blue light-resistant layer 122 of the present embodiment is formed on the first surface 1211 of the protective substrate 121 by stacking layers by an evaporation or sputtering technique, and the total thickness of the blue-resistant layer 122 is formed. It can be greater than or equal to 1100 nm and less than 3500 nm.

Referring to FIG. 1A again, the touch electrode layer 123 is disposed between the protective substrate 121 and the display panel 11 and is disposed to overlap the anti-blue light layer 122. The touch electrode layer 123 of the present embodiment is disposed on the upper surface 111 of the display panel 11 facing the protective substrate 121. More specifically, the touch electrode layer 123 is directly formed on the display panel 11 by using a photolithography process. Surface 111. The upper surface 111 of the display panel 11 can be, for example, a polarizing layer, a color filter layer or a cover substrate (not shown) in the structure of the display panel 11 to provide a surface closer to the user. There is no limit here. In addition, the anti-blue layer 122 and the touch electrode layer 123 An adhesive layer 124 may be further disposed to bond the protective substrate 121 having the blue light resistant layer 122 to the display panel 11 having the touch electrode layer 123. In another embodiment, the touch electrode layer 123 can be directly formed on the surface of the anti-blue light layer 122 facing the display panel 11 by using a photolithography process, and between the touch electrode layer 123 and the display panel 11 . An adhesive layer 124 is further disposed to adhere the protective substrate 121 having the anti-blue layer 122 and the touch electrode layer 123 to the upper surface 111 of the display panel 11. In this configuration, the touch electrode layer 123 is disposed on the upper surface 111 of the display panel 11 through the adhesive layer 124.

The material of the touch electrode layer 123 may be a transparent conductive material, such as indium tin oxide (ITO), indium zinc oxide (IZO), or fluorine doped tin oxide (FTO). , aluminum doped zinc oxide (AZO), gallium doped zinc oxide (GZO), silver nanowire (SNW), metal mesh or graphene The material of the adhesive layer 124 may be an Optical Clear Adhesive (OCA) or an Optical Clear Resin (OCR), which is not limited in the present invention.

In addition, in the embodiment of the touch display device 1 shown in FIG. 1A, since the anti-blue light layer 122 is disposed between the protective substrate 121 and the touch electrode layer 123, in other words, the anti-blue light layer 122 is compared with the touch electrode layer. 123 is a layer closer to the user. Therefore, the anti-blue layer 122 of the present embodiment can further serve as an optical matching layer for matching the optical effect of the touch electrode layer 123 to reduce the electrode etching line of the touch electrode layer 123. degree.

In addition, please refer to FIG. 2 , which is a schematic diagram of a touch display device 1 a according to different embodiments of the present invention.

The main difference between the touch display device 1 and the touch display device 1 of FIG. 1A is that the touch electrode layer 123 of the touch display device 1a is disposed on the first surface 1211 of the protective substrate 121 facing the display panel 11, and is resistant to blue light. The layer 122 is disposed on the upper surface 111 of the display substrate 11 facing the protective substrate 121. More specifically, the touch electrode layer 123 is directly formed on the first surface 1211 of the protective substrate 121 by a photolithography process, and is resistant to blue light. The layer 122 is directly formed on the upper surface 111 of the display panel 11 by an evaporation or sputtering process. In addition, an adhesive layer 124 is further disposed between the touch electrode layer 123 and the blue light-resistant layer 122, and the protective substrate 121 having the touch electrode layer 123 is further adhered to the display panel having the blue light-resistant layer 122 through the adhesive layer 124. 11. In another In one embodiment, after the touch electrode layer 123 is formed on the first surface 1211 of the protective substrate 121, and the touch electrode layer 123 is not damaged in the process, the blue light-resistant layer 122 may be formed by an evaporation or sputtering process. The touch electrode layer 123 is disposed on the surface of the display panel 11 , and an adhesive layer 124 is further disposed between the anti-blue light layer 122 and the display panel 11 , and the protective substrate 121 having the touch electrode layer 123 and the blue light resistant layer 122 is further advanced. The upper surface 111 of the display panel 11 is bonded by the adhesive layer 124. The anti-blue light layer 122 is disposed on the upper surface 111 of the display panel 11 through the adhesive layer 124 in view of the structure.

For other technical features of the touch display device 1a, reference may be made to the touch display device 1, and details are not described herein.

In addition, the touch electrode layer 123 can be designed as a touch electrode structure of a double-layer conductive layer in addition to the touch electrode structure of the single-layer conductive layer as shown in FIG. 1A and FIG. 2, and is matched with a multilayer substrate. The touch structure, such as Glass-Glass (GG), Double-Film-Film (GFF), etc., allows the anti-blue layer 122 to be disposed on the protective substrate according to the difference of the touch structure and the convenience of the process. The different lamination positions between 121 and display panel 11 are also not limited by the present invention.

Please refer to FIG. 3, which is a schematic diagram of the spectrum of light passing through the blue light resistant layer of the present invention.

As can be seen from FIG. 3, when the light emitted from the light-emitting element (for example, LED) of the display panel 11 passes through the anti-blue layer 122, the transmittance of the light having a wavelength of 380 nm to 427 nm is less than 1%, and the light having a wavelength of less than 435 nm is also Almost filtered, therefore, it is obviously effective to intercept short-wave blue light and ultraviolet (UV); in addition, when light passes through the touch display device with blue light-resistant layer 122 of the present invention, the average transmittance of light wavelengths from 445 nm to 700 nm is greater than 90%, therefore, the color displayed on the display panel 11 is not distorted.

The touch display device of the present invention is provided with a plurality of pairs of first material layers and a second material layer anti-blue light layer between the protective substrate and the display panel, and the refractive index of the first material layer is greater than that of the second material layer. The refractive index, while the thickness of the first material layer is between 20 nm and 50 nm, and the thickness of the second material layer is between 20 nm and 70 nm. By the characteristics of reflection, transflection and polarization of the anti-blue layer, light having a wavelength of less than 430 nm can be achieved with low transmittance, but light having a wavelength of 445 nm to 700 nm has a high transmittance, and therefore, touch Display device Effectively intercepts short-wave blue and ultraviolet light while ensuring that the display color is not distorted.

In summary, in the touch display device and the touch panel of the present invention, a plurality of pairs of first material layers and second material layers are disposed between the protective substrate and the display panel, and the first material layer is The refractive index is greater than the refractive index of the second material layer, and the thickness of the first material layer is between 20 nm and 50 nm, and the thickness of the second material layer is between 20 nm and 70 nm. Thereby, the touch display device and the touch panel of the present invention can effectively intercept the short-wave blue light and ultraviolet light emitted by the display screen, and ensure that the display color is not distorted.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1‧‧‧Touch display device

11‧‧‧ display panel

111‧‧‧Upper surface

12‧‧‧Touch panel

121‧‧‧Protective substrate

1211‧‧‧ first surface

1212‧‧‧ second surface

122‧‧‧Anti-blue layer

123‧‧‧Touch electrode layer

124‧‧‧Adhesive layer

Claims (20)

A touch display device includes: a display panel; and a touch panel disposed opposite to the display panel, the touch panel includes: a protective substrate; and a blue light resistant layer disposed on the protective substrate and the display panel The blue light-resistant layer is formed by laminating a plurality of pairs of first material layers and a second material, the first material layer having a refractive index greater than a refractive index of the second material layer, and a thickness of the first material layer Between 20 nm and 50 nm, the thickness of the second material layer is between 20 nm and 70 nm; and a touch electrode layer is disposed between the protective substrate and the display panel. And overlapping with the anti-blue light layer; wherein the plurality of pairs of the first material layer and the second material layers are sequentially staggered, and the anti-blue light layer is the first material layer facing the touch electrode layer. The touch display device of claim 1, wherein the first material layer has a refractive index between 1.6 and 2.8. The touch display device of claim 1, wherein the second material layer has a refractive index between 1.3 and 1.6. The touch display device of claim 1, wherein the material of the first material layer comprises trititanium pentoxide, tantalum pentoxide, tantalum nitride, or a combination thereof. The touch display device of claim 1, wherein the material of the second material layer comprises cerium oxide, magnesium difluoride, or a combination thereof. The touch display device of claim 1, wherein the anti-blue light layer is formed by stacking at least 12 pairs of the first material layer and the second material. The touch display device of claim 1, wherein the anti-blue layer is disposed on a surface of the protection substrate facing the display panel, and the touch electrode layer is disposed on a surface of the display panel facing the protection substrate. . The touch display device of claim 7, wherein an adhesive is disposed between the anti-blue layer and the touch electrode layer or between the touch electrode layer and the display panel. Floor. The touch display device of claim 1, wherein the touch electrode layer is disposed on a surface of the protective substrate facing the display panel, and the anti-blue light layer is disposed on a surface of the display panel facing the protective substrate. . The touch display device of claim 9, wherein an adhesive layer is further disposed between the touch electrode layer and the blue light resistant layer or between the blue light resistant layer and the display panel. A touch display device includes: a display panel; and a touch panel disposed opposite to the display panel, the touch panel includes: a protective substrate; and a blue light resistant layer disposed on the protective substrate and the display panel The blue light-resistant layer is formed by laminating a plurality of pairs of first material layers and second material layers, and additionally adding a second material layer, the first material layer having a refractive index greater than a refractive index of the second material layer And the thickness of the first material layer is between 20 nm and 50 nm, the thickness of the second material layer is between 20 nm and 70 nm; and a touch electrode layer is disposed on the Between the protective substrate and the display panel, and overlapping with the anti-blue light layer; wherein the second material layer is additionally added, and the plurality of pairs of the first material layers and the second material layers are sequentially staggered and stacked The topmost layer and the bottom layer are the second material layer, and the anti-blue light layer is the second material layer to the touch electrode layer. A touch panel includes: a protective substrate; a blue light resistant layer disposed on the protective substrate, wherein the blue light resistant layer is formed by laminating a plurality of pairs of first material layers and second materials, the first material layer The refractive index is greater than the refractive index of the second material layer, and the thickness of the first material layer is between 20 nm and 50 nm, and the thickness of the second material layer is between 20 nm and 70 nm. And a touch electrode layer disposed on the protective substrate and disposed adjacent to the anti-blue light layer; wherein the plurality of pairs of the first material layers and the second material layers are sequentially staggered and stacked The blue light layer is on the first electrode layer to the touch electrode layer. The touch panel of claim 12, wherein the first material layer has a refractive index between 1.6 and 2.8. The touch panel of claim 12, wherein the second material layer has a refractive index between 1.3 and 1.6. The touch panel of claim 12, wherein the material of the first material layer comprises trititanium pentoxide, tantalum pentoxide, tantalum nitride, or a combination thereof. The touch panel of claim 12, wherein the material of the second material layer comprises cerium oxide, magnesium difluoride, or a combination thereof. The touch panel of claim 12, wherein the anti-blue layer is formed by stacking at least 12 pairs of the first material layer and the second material. The touch panel of claim 12, wherein the blue light resistant layer is disposed on a surface of the protective substrate. The touch panel of claim 12, wherein the touch electrode layer is disposed on a surface of the protection substrate. A touch panel includes: a protective substrate; a blue light resistant layer disposed on the protective substrate, wherein the blue light resistant layer is formed by stacking a plurality of pairs of first material layers and second material layers, and additionally adding a second material layer The refractive index of the first material layer is greater than the refractive index of the second material layer, and the thickness of the first material layer is between 20 nm and 50 nm, and the thickness of the second material layer is between Between 20 nm and 70 nm; and a touch electrode layer disposed on the protective substrate, disposed overlapping the blue light resistant layer; wherein the second material layer is additionally added, and the first pair of the plurality The material layer and the second material layers are sequentially staggered, and the topmost layer and the bottom layer are the second material layer, and the blue light-resistant layer is the second material layer facing the touch electrode layer.