TW201301221A - Display device, anti-reflective transparent substrate and manufacturing method thereof - Google Patents

Abstract

A display device includes a display panel and an anti-reflective substrate. The anti-reflective substrate disposed above the display panel includes a base and a plurality of moth-eyes structures. The base has a plurality of concaves where the moth-eyes structures are located. The height of the moth-eyes structures is smaller than the deep of the concaves.

Description

Display device, anti-reflection substrate and method of manufacturing same

The present invention relates to a display device, an antireflection substrate, and a method of fabricating the same, and more particularly to a display device using a moth eye structure, an antireflection substrate, and a method of fabricating the same.

With the advancement of display technology, a flat panel display has been developed. Flat panel displays have the advantages of lightness, thinness, and versatility, making flat-panel displays a comprehensive replacement for conventional cathode ray image tube displays.

The flat panel display is, for example, a liquid crystal display, an organic light emitting diode display, or an electronic paper display. These flat-panel displays each have their own advantages and are widely used in various electronic devices. However, since the appearance of the flat panel display is flat, when the human eye views the flat panel display, it often causes uncomfortable reflection due to the reflection of light. Therefore, the industry is committed to the development of anti-reflection substrates to improve uncomfortable reflection.

The invention relates to a display device, an anti-reflection substrate and a manufacturing method thereof, which utilizes the design of a groove and a moth-eye structure, so that the moth-eye structure can be protected by the groove, and the anti-reflection effect is effectively exerted to improve the discomfort. Reflective phenomenon.

According to an aspect of the invention, a display device is proposed. The display device includes a display panel and an anti-reflection substrate. The anti-reflection substrate is disposed on the display panel. The antireflection substrate comprises a substrate and a plurality of moth eye structures. The antireflection substrate has a plurality of grooves. These moth eye structures are disposed in these grooves. The height of the moth eye structures is less than the depth of the grooves.

According to another aspect of the present invention, an antireflection substrate is proposed. The antireflection substrate comprises a substrate and a plurality of moth eye structures. The substrate has a plurality of grooves. These moth eye structures are disposed in these grooves. The height of the moth eye structures is less than the depth of the grooves.

According to still another aspect of the present invention, a method of manufacturing an antireflection substrate is proposed. The method of manufacturing the antireflection substrate includes the following steps. A substrate is provided. A plurality of grooves are formed on the substrate. Several moth eye structures are formed in these grooves. The height of the moth eye structures is less than the depth of the grooves.

In order to make the above-mentioned contents of the present invention more comprehensible, the preferred embodiments are described below, and the detailed description is as follows:

The following is a detailed description of the embodiment, which utilizes the design of the groove and the moth-eye structure, so that the moth-eye structure can be protected by the groove, and the anti-reflection effect is effectively exerted to improve the uncomfortable reflection phenomenon. However, the examples are for illustrative purposes only and are not intended to limit the scope of the invention. In addition, the drawings in the embodiments are omitted to partially illustrate the technical features of the present invention.

First embodiment

Please refer to FIG. 1 , which is a schematic diagram of the display device 100 of the first embodiment. The display device 100 includes a display panel 110 and an anti-reflection substrate 120. The display panel 110 is, for example, a liquid crystal display panel, an organic light emitting diode display panel, or an electronic paper display panel. The display panel 110 is used to display a picture for viewing. The anti-reflection substrate 120 of the present embodiment may be an anti-reflection transparent substrate, such as a transparent protective glass or a touch panel of the display device 100, which is disposed on the display panel 110. In other embodiments, the anti-reflection substrate 120 may also be a flexible polymer material substrate. The anti-reflection substrate 120 can reduce the reflectance of the light L, so that it is uncomfortable to see the phenomenon of reflection when the human eye views the picture.

Please refer to FIG. 2 , which is an enlarged schematic view of the anti-reflection substrate 120 of FIG. 1 . The anti-reflection substrate 120 includes a substrate 121 and a plurality of moth-eye structures 122. The substrate 121 has a plurality of grooves 123. These grooves 123 are regularly arranged and covered on the substrate 121. The moth eye structures 122 are disposed in the grooves 123.

Please refer to FIG. 3, which illustrates a light refraction diagram of the incident moth-eye structure 122. The refractive index ns of the substrate 121 is, for example, 1.5, and the refractive index (not shown) of the moth-eye structure 122 is close to the refractive index ns of the substrate 121, and the refractive index ni of the air is, for example, 1.0003. Since the cross section of the moth eye structure 122 is formed into a tapered or hemispherical shape, the closer to the substrate 121, the higher the proportion of the light L contacting the moth eye structure 122. Conversely, the farther away from the substrate 121, the lower the proportion of light L that contacts the moth-eye structure 122. Therefore, the total refractive index of the light L will gradually change from ni to ns, showing a gradient change. Thereby, the phenomenon of reflection is greatly reduced. Preferably, the period Λ of the moth-eye structure 122 (the periodic Λ is the minimum distance over which the structure reappears, such as the distance between the two vertices shown in FIG. 3), the wavelength λ of the ray L, and the refraction of the substrate 121. When the relationship of the rate ns satisfies the following formula (1), the moth eye structure 122 has an anti-reflection effect on the light ray L.

Λ<λ/ns..........................................(1)

Taking visible light as an example, the period Λ of the moth-eye structure 122 is less than 250 nanometers (nm), and when the ratio of the height 122h of the moth-eye structure 122 to the width 122w is greater than 1.5, an anti-reflection effect can be obtained for visible light.

Referring to FIG. 2 again, in the embodiment, the height 122h of the moth eye structure 122 is smaller than the depth 123z of the grooves 123. As a result, when the anti-reflection substrate 120 is rubbed, the moth-eye structure 122 can be prevented from being directly damaged to maintain the effect of the gradient refractive index as shown in FIG.

Please refer to FIG. 4 , which shows a schematic view of the groove 123 of FIG. 2 . As far as the design of the groove 123 is concerned, the groove 123 may be a rectangular structure or a parallelogram structure. In the embodiment, the grooves 123 are rectangular structures, and the edges of the respective grooves 123 correspond to the edges of the respective pixels (not shown) of the display panel 110. In this way, the sidewall 123s of the recess 123 can be disposed just in the non-display area of each pixel, such as the data line or the gate line region in the pixel, to avoid affecting the quality of the picture. In addition, the design of the groove 123 can take into account the visibility of the groove 123 by the human eye, the strength of the side wall 123s of the groove 123, effectively prevent the moth-eye structure 122 from being damaged, or allow most of the light L to be injected into the moth eye. Structure 122 and other factors.

As shown in Fig. 4, the distance between adjacent grooves 123 may be 10 to 30 micrometers (um). The depth 123z of each of the grooves 123 may be 1 to 5 micrometers (um). The length 123y of each of the grooves 123 may be 1 to 3 times the width 123x of each of the grooves 123. For example, the width 123x of the groove 123 may be 20 to 100 micrometers (um), and the length 123y of the groove 123 may be 20 to 300 micrometers (um). Of course, those skilled in the art of the present invention can adjust the design of the groove according to the needs or materials used in the teaching of Fig. 4 of the present invention.

The groove 123 and the moth eye structure 122 proposed in this embodiment are innovative designs, and the manufacturing method thereof is also a technical breakthrough. Hereinafter, a method of manufacturing the anti-reflection substrate 120 of the present embodiment will be described in a plurality of schematic diagrams.

Referring to FIGS. 5-8, a schematic view of a method of manufacturing the anti-reflection substrate 120 of the first embodiment is shown. First, as shown in Fig. 5, a substrate 121 is provided.

Next, as shown in FIGS. 6 to 7, a plurality of grooves 123 are formed on the substrate 121. In this step, the grooves 123 may be formed by etching, laser engraving, precision sand blasting or ultra-precision machining (CNC).

Then, as shown in Fig. 8, a plurality of moth eye structures 122 are formed in the grooves 123. In this step, the moth eye structures 122 may form the moth eye structures 122 by means of lithography, electron beam engraving or nanotransfer. The material of the moth-eye structure 122 may include gold, silver, titanium, tin, carbon, titanium dioxide (TiO2), niobium pentoxide (Nb2O5), tantalum pentoxide (Ta2O5), zirconium oxide (ZrO2), nitrogen bismuth compound. (SiNx), magnesium fluoride (MgF2), cerium oxide (SiO2), a conductive polymer or a composition thereof. The anti-reflection substrate 120 of this embodiment can be completed by the above manufacturing method.

Second embodiment

Please refer to FIG. 9 , which illustrates a schematic view of the recess 223 of the second embodiment. The groove 223 of this embodiment is different from the groove 123 of the first embodiment in the arrangement of the grooves 223, and the rest of the same points will not be repeatedly described.

As shown in FIG. 9, the grooves 223 of the adjacent two columns of the present embodiment are relatively translated by a predetermined distance 223p, for example, the width 223x of the half groove 223. By means of translation, the side wall 223s of the groove 223 is formed into a bent state (for example, the side wall 223s depicted in FIG. 9 extends along the arrow A, and the arrow A first extends along the direction D1, and then along the direction D2. Extending, and then extending along the direction D1 to form a bent shape), thereby strengthening the strength of the side wall 223s.

Third embodiment

Referring to FIG. 10, a schematic view of the recess 323 of the third embodiment is shown. The groove 323 of this embodiment is different from the groove 123 of the first embodiment in the shape of the groove 323, and the rest of the same points will not be repeatedly described.

As shown in Fig. 10, the groove 323 of this embodiment has a triangular structure. The side length 323i of the triangular grooves 323 may be 20 to 190 micrometers (um).

Fourth embodiment

Please refer to FIG. 11 , which illustrates a schematic view of the recess 423 of the fourth embodiment. The groove 423 of this embodiment is different from the groove 123 of the first embodiment in the shape of the groove 423, and the rest of the same is not repeated.

As shown in Fig. 11, the groove 423 of this embodiment has a circular structure. The diameter 423R of each of the grooves 423 may be 20 to 200 micrometers (um).

According to the above embodiment, the design of the grooves 123, 223, 323, and 423 and the moth eye structure 122 proposed by the above embodiments enables the moth eye structure 122 to be protected by the grooves 123, 223, 323, and 423, thereby effectively exerting Anti-reflective effect to improve uncomfortable reflection.

In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100. . . Display device

110. . . Display panel

120. . . Anti-reflection substrate

121. . . Base

122. . . Moth eye structure

122h. . . Height of moth eye structure

122w. . . Width of moth eye structure

123, 223, 323, 423. . . Groove

123a, 123b. . . Distance between grooves

123s, 223s. . . Side wall of the groove

123x. . . Width of the groove

123y. . . Length of the groove

123z. . . Depth of the groove

223p. . . Predetermined distance

323i. . . Side of the groove

423R. . . Diameter of the groove

A. . . Arrow

D1, D2. . . Extension direction

L. . . Light

Hey. . . Moth eye structure cycle

Ni, ns. . . Refractive index

FIG. 1 is a schematic view showing a display device of the first embodiment.

FIG. 2 is an enlarged schematic view showing the anti-reflection substrate of FIG. 1.

Figure 3 is a schematic diagram showing the light refraction of the moth eye structure.

Figure 4 is a schematic view of the groove.

5 to 8 are schematic views showing a method of manufacturing the antireflection substrate of the first embodiment.

Figure 9 is a schematic view showing the groove of the second embodiment.

Figure 10 is a schematic view showing the groove of the third embodiment.

Figure 11 is a schematic view showing the groove of the fourth embodiment.

120. . . Anti-reflection substrate

121. . . Base

122. . . Moth eye structure

122h. . . Height of moth eye structure

123. . . Groove

123z. . . Depth of the groove

Claims (20)

A display device includes: a display panel; and an anti-reflection substrate disposed on the display panel, the anti-reflection substrate includes: a substrate having a plurality of grooves; and a plurality of moth-eye structures disposed on the concave surfaces Within the slot, the height of the moth eye structures is less than the depth of the grooves. The display device of claim 1, wherein the grooves are rectangular structures or parallelogram structures. The display device of claim 2, wherein the distance between the adjacent grooves is 10 to 30 micrometers (um). The display device of claim 2, wherein each of the grooves has a depth of 1 to 5 micrometers (um). The display device of claim 2, wherein the length of each of the grooves is 1 to 3 times the width of each of the grooves. The display device of claim 5, wherein each of the grooves has a width of 20 to 100 micrometers (um). The display device of claim 1, wherein the grooves are triangular structures. The display device of claim 7, wherein each of the grooves has a side length of 20 to 190 micrometers (um). The display device of claim 1, wherein the anti-reflection substrate is an anti-reflection transparent substrate. The display device of claim 1, wherein the grooves are circular structures. The display device of claim 10, wherein each of the grooves has a diameter of 20 to 200 micrometers (um). The display device of claim 1, wherein the display panel comprises a plurality of pixels, and an edge of each of the grooves corresponds to an edge of each of the pixels. The display device of claim 1, wherein the two adjacent rows of the grooves are relatively translated by a predetermined distance such that the side walls of the grooves form a bent state. The display device of claim 1, wherein the total refractive index of the light incident on one of the moth eye structures exhibits a gradient change. The display device of claim 14, wherein the gradient change is a change from a low refractive index to a high refractive index. The display device according to claim 1, wherein the moth-eye structure has a tapered or hemispherical shape. An anti-reflection substrate comprises: a substrate having a plurality of grooves; and a plurality of moth-eye structures disposed in the grooves, the heights of the moth-eye structures being smaller than the depth of the grooves. A method for manufacturing an anti-reflection substrate, comprising: providing a substrate; forming a plurality of grooves on the substrate; and forming a plurality of moth-eye structures in the grooves, wherein the heights of the moth-eye structures are smaller than the grooves The depth. The method for manufacturing an anti-reflection substrate according to claim 18, wherein the steps of forming the grooves are performed by etching, laser engraving, precision sand blasting or ultra-precision machining (CNC). groove. The method for manufacturing an anti-reflection substrate according to claim 18, wherein the step of forming the moth-eye structure forms the moth-eye structure by means of a lithography process, electron beam engraving or nano-transfer.