Glass double-sided microstructure device, manufacturing method thereof and backlight system

Abstract

A first surface of the glass double-sided microstructure device is concavely provided with a plurality of first pits in an array, a second surface of the glass double-sided microstructure device is concavely provided with second pits in one-to-one correspondence with the first pits, and the second surface is also concavely provided with a plurality of concave lattice points. Therefore, the light entering the first pit can be refracted by the concave surface to increase the light-emitting angle, so that the light is propagated in the glass double-sided microstructure device, the light entering the second pit can be reflected by the concave surface and the second surface and then enters the glass double-sided microstructure device to be propagated again, and the light diffusion effect is improved. The concave lattice points scatter the light and then emit the light, so that the light emitted from the second surface forms a uniform area light source; besides, the glass double-sided micro-structure device is made of a glass plate, so that the glass double-sided micro-structure device can bear high temperature and can be directly arranged on the surface of a Mini-LED lamp panel to realize zero light mixing distance, and the thickness requirement of thinning is met. The invention discloses a glass double-sided microstructure device manufacturing method and a backlight system.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal display backlight systems, and in particular to a glass double-sided microstructure device that can meet the thickness requirements of thinness and withstand the high heat of a light board, a manufacturing method thereof, and a backlight system. Background Art

[0002] A backlight system is required in a liquid crystal display (LCD) to provide a uniform surface light source. At present, a commonly used solution in a backlight system 1' is to place an LED light source 10' at the bottom, a lens 20' is arranged outside the LED light source 10', and then a diffusion plate 30' is placed at a height h from the lens 20'. The light from multiple LED light sources 10' is converted into a uniform surface light source through the diffusion plate 30'. Figure 1 shown.

[0003] With the development of LCD technology, Mini-LED technology has emerged in recent years in pursuit of thinness and dynamic backlight technology. Figure 2 As shown, the current LCD system 1' with Mini-LED technology includes: the bottom Mini-LED light board (LightBoard) 10', on which the Mini-LED is a very small blue LED, usually between 100-500 microns, and there are tens of thousands of blue LEDs (Blue Chip) on a Mini-LED light board 10'. A diffuser (Diffuser) 20' is placed at a certain distance above the Mini-LED light board 10'. The diffuser 20' is used to convert the dot matrix blue light emitted by tens of thousands of Mini-LEDs into a uniform surface light source. Above the diffuser 20' are arranged in sequence a QD film (Quantum DotFilm) 30', an optical film (Optical Film) 40' and an LCD module 50'.

[0004] In the existing LCD system 1', the distance between the Mini-LED light board 10' and the diffuser 20' is the optical distance (OD). Usually, in order to pursue thinness, OD=0 is required, that is, the diffuser 20' is directly placed on the surface of the Mini-LED light board 10', and the thickness of the diffuser 20' is required to be as thin as possible. However, the commonly used diffuser 20' material is polystyrene (PS), which is a polymer optical material with light diffusion properties. The working principle of the PS diffuser is that it contains a lot of diffusion particles inside. When the light enters the diffuser, the diffusion particles scatter the light. When the thickness of the diffuser 20' is reduced, the scattering effect will be reduced, and it is not easy to form a uniform surface light source. In addition, the light board 10' will generate a lot of heat when it emits light. In this way of placing the diffuser 20' directly on the surface of the light board 10', the temperature of the diffuser 20' will become higher after absorbing heat, but the PS material is an organic material that cannot withstand high temperatures. Therefore, based on the thinning requirements and the influence of temperature, the existing PS diffusion plate cannot meet the technical requirements of the Mini-LED backlight system.

[0005] Therefore, it is necessary to provide a glass double-sided microstructure device and a manufacturing method thereof that can meet the thickness requirements of thinness and withstand the high heat of the light board to solve the above problems. Summary of the invention

[0006] An object of the present invention is to provide a glass double-sided microstructure device that can meet the thickness requirements of thinness and withstand the high heat of a lamp panel.

[0007] Another object of the present invention is to provide a method for manufacturing a glass double-sided microstructure device that can meet the thickness requirements of thinness and withstand the high heat of a lamp panel.

[0008] Another object of the present invention is to provide a backlight system that can meet the thickness requirements of thinness and withstand the high heat of the lamp panel.

[0009] To achieve the above-mentioned purpose, the technical solution of the present invention is: to provide a glass double-sided microstructure device, which includes a first surface and a second surface arranged opposite to each other, the first surface is concavely provided with a plurality of first pits in an array, the second surface is concavely provided with second pits corresponding one by one to the first pits, and the second surface is also concavely provided with a plurality of concave dots.

[0010] Preferably, the shapes of the first pit and the second pit are the same or different.

[0011] Preferably, the first pit is arc-shaped and the second pit is conical, so that when light enters the first pit, the light will be refracted by its arc surface to increase the luminous angle, thereby propagating inside the glass double-sided microstructure device, and when the light enters the conical surface of the second pit, it will be reflected by the conical surface and the second surface and enter the interior of the glass double-sided microstructure device again to continue propagating, thereby improving the diffusion effect of light in the glass double-sided microstructure device, so that the light emitted from the second surface of the glass double-sided microstructure device can form a uniform surface light source.

[0012] Preferably, the concave dots are arc-shaped and are astigmatism structures, which can scatter the light incident into the glass double-sided microstructure device and then emit it out, so as to enhance the diffusion effect of the glass double-sided microstructure device, thereby further improving the light uniformity effect of the glass double-sided microstructure device.

[0013] Correspondingly, the present invention also provides a method for manufacturing a glass double-sided microstructure device, which comprises the following steps:

[0014] (1) providing a glass plate, and silk-screening an acid-resistant ink pattern arranged in an array on a first surface of the glass plate;

[0015] (2) turning over the glass plate so that the first surface of the glass plate is located at the bottom and the second surface of the glass plate is located at the top;

[0016] (3) using a laser to perform etching at a position above the glass plate corresponding to the acid-resistant ink pattern, so as to etch a first blind hole on the second surface, during which the laser light not absorbed by the glass plate is transmitted to the acid-resistant ink pattern, thereby etching an ink window on the acid-resistant ink pattern;

[0017] (4) reducing the laser power and continuing to etch the second surface to etch a second blind hole on the second surface;

[0018] (5) placing the glass plate in a hydrofluoric acid solution, and chemically etching the first surface and the second surface of the glass plate, so that the ink window position on the first surface is sunken to form a first pit, and at the same time, the first blind hole on the second surface is formed into a second pit, and the second blind hole is formed into a concave dot;

[0019] (6) Taking out the glass plate after chemical etching, removing the acid-resistant ink pattern on the first surface, thereby obtaining a glass double-sided microstructure device.

[0020] Preferably, the shapes of the first pit and the second pit are the same or different.

[0021] Preferably, the first pit is arc-shaped and the second pit is conical, so that when light enters the first pit, the light will be refracted by its arc surface to increase the luminous angle, thereby propagating inside the glass double-sided microstructure device, and when the light enters the conical surface of the second pit, it will be reflected by the conical surface and the second surface and enter the interior of the glass double-sided microstructure device again to continue propagating, thereby improving the diffusion effect of light in the glass double-sided microstructure device, so that the light emitted from the second surface of the glass double-sided microstructure device can form a uniform surface light source.

[0022] Preferably, the concave dots are arc-shaped and are astigmatism structures, which can scatter the light incident into the glass double-sided microstructure device and then emit it out, so as to enhance the diffusion effect of the glass double-sided microstructure device, thereby further improving the light uniformity effect of the glass double-sided microstructure device.

[0023] Correspondingly, the present invention also provides a backlight system, which includes a lamp board, a prism film, a quantum dot film, a brightness enhancement film and the glass double-sided microstructure device as described above; wherein, one side of the lamp board is provided with a plurality of blue light Mini-LED lamps arranged in an array; the first surface of the glass double-sided microstructure device is arranged on the lamp board, and each of the first pits corresponds one by one to the position of each of the blue light Mini-LED lamps; the prism film is arranged above the second surface of the glass double-sided microstructure device, and is used to reflect strong light in the direction perpendicular to the normal to enter the glass double-sided microstructure device for the second time; the quantum dot film is arranged above the prism film, and is used to convert blue light into white light; the brightness enhancement film is arranged above the quantum dot film, and is used to enhance the brightness of the backlight system.

[0024] Preferably, the surface of each of the blue light Mini-LED lamps is covered with a silicone lens, and the silicone lens is directly formed by dripping silicone on the surface of the blue light Mini-LED lamp, thereby reducing the thickness of the lens, thereby meeting the thinness requirement of the backlight system.

[0025] Preferably, the glass double-sided microstructure device is fixed to the light board by optically clear adhesive (OCA), thereby ensuring that the blue light Mini-LED lamp corresponds to the first pit and the second pit one by one, and preventing misalignment between the blue light Mini-LED lamp and the first pit and the second pit.

[0026] Compared with the prior art, the glass double-sided microstructure device of the present invention has a plurality of first pits in an array on its first surface, a second pit corresponding to the first pit on its second surface, and a plurality of concave dots on the second surface. Therefore, when light enters the first pit, the light will be refracted by the concave surface to increase the luminous angle, thereby propagating inside the glass double-sided microstructure device, and when the light enters the second pit, it will be reflected by the concave surface and the second surface and enter the glass double-sided microstructure device again to continue propagating, thereby enhancing the diffusion effect of light, and then making the light emitted from the second surface of the glass double-sided microstructure device form a uniform surface light source; secondly, the concave dots on the second surface scatter the light and emit it, further enhancing the diffusion effect of the glass double-sided microstructure device, and further enhancing the uniform light effect of the glass double-sided microstructure device; furthermore, the glass double-sided microstructure device is made of a glass plate, so it can withstand high temperatures, so that the glass double-sided microstructure device can be directly set on the surface of the Mini-LED light board to achieve zero mixed light distance, thereby meeting the thickness requirements of the thin backlight system.

[0027] Correspondingly, the method for manufacturing a glass double-sided microstructure device also has the above-mentioned technical effects.

[0028] In addition, the backlight system using the glass double-sided microstructure device of the present invention has the above-mentioned technical effects. Based on the good scattering and light-homogenizing effects of the glass double-sided microstructure device, the spacing between blue light Mini-LED lamps can be increased, thereby reducing the number of blue light Mini-LED lamps and further reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of a backlight system in the prior art.

[0030] Figure 2 It is a structural schematic diagram of a backlight system with Mini-LED in the prior art.

[0031] Figure 3 It is a schematic diagram of the state of silk-screening an acid-resistant ink pattern on the first surface of the glass plate in the present invention.

[0032] Figure 4 yes Figure 3 Schematic diagram of the glass plate in the state of being laser etched on its second surface after being inverted.

[0033] Figure 5 yes Figure 4 Schematic diagram of the state of laser etching concave dots on the glass plate.

[0034] Figure 6 yes Figure 5 Schematic diagram of the glass plate after chemical etching.

[0035] Figure 7 yes Figure 6 Schematic diagram of the structure of the glass double-sided microstructure device obtained after removing the acid-resistant ink pattern from the glass plate.

[0036] Figure 8 It is a schematic structural diagram of the backlight system of the present invention.

[0037] Fig. 9 It is a schematic diagram of the optical path principle of the backlight system of the present invention. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are now described with reference to the accompanying drawings, in which similar element numbers represent similar elements. It should be noted that the orientation descriptions involved in the present invention, such as the orientations or positional relationships indicated by up, down, left, right, front, and back, are all based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present application or / and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The first, second, etc. described are only used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] Combination Figure 3-Figure 8 As shown, the glass double-sided microstructure device 120 provided by the present invention is mainly suitable for the backlight system 100, and is used to replace the PS diffuser in the prior art. The glass double-sided microstructure device 120 can not only withstand the high heat of the lamp board 110 to achieve the zero mixed light distance (Optical Distance, OD for short) design of the backlight system 100, thereby meeting the thickness requirements of thinness, but also can improve the scattering effect, thereby forming a uniform surface light source.

[0040] See below first Figure 7As shown, in one embodiment of the present invention, the glass double-sided microstructure device 120 includes a first surface 121 and a second surface 122 that are arranged opposite to each other. Among them, the first surface 121 is concavely provided with a plurality of first pits 1211 in an array, and the second surface 122 is concavely provided with second pits 1221 that correspond to the first pits 1211 one by one. Specifically, the center line P of each first pit 1211 coincides with the center line P of the corresponding second pit 1221. In addition, a plurality of concave dots 1222 are also concavely provided in the area between the second pits 1221 on the second surface 122. In this embodiment, the shapes of the first pit 1211 and the second pit 1221 may be the same or different, and the shape of the concave dots 1222 may be the same as the shape of the first pit 1211 and / or the second pit 1221, or may be different from the shapes of both. It can be flexibly arranged according to the needs, and is not specifically limited here.

[0041] Continue to view Figure 7 As shown, in a specific embodiment of the present invention, the shapes of the first pit 1211 and the second pit 1221 are different. Specifically, the first pit 1211 is arc-shaped, that is, the first pit 1211 has an arc surface formed by inward depression. More preferably, the first pit 1211 is arc-shaped. The second pit 1221 is conical, and the second pit 1221 is a cone formed by the second surface 122 being concave inward and gradually narrowing, and the center line P of the second pit 1221 coincides with the center line P of the corresponding first pit 1211. In this embodiment, the concave dots 1222 are arc-shaped, specifically formed by the second surface 122 being concave inward, and the outer diameter and depth of the concave dots 1222 are smaller than the outer diameter and depth of the first pit 1211, and the outer diameter and depth of the concave dots 1222 are also smaller than the opening outer diameter and depth of the second pit 1221. It is understandable that the shapes of the first pit 1211 , the second pit 1221 , and the concave dots 1222 are not limited to those in the present embodiment, and can be flexibly set as required.

[0042] Combination Figure 7 , Fig. 9 As shown, when the glass double-sided microstructure device 120 of the present invention is applied to the backlight system 100, the first surface 121 is its light incident surface, and the second surface 122 is its light emitting surface. In this way, when light enters the first pit 1211, the light will be refracted by its curved surface to increase the luminous angle, so that the light propagates inside the glass double-sided microstructure device 120, as shown in FIG. Fig. 9 As shown in the optical path A in FIG. 1 . When the light enters the conical surface of the second pit 1221, the light is reflected by the conical surface and the second surface 122 of the glass double-sided microstructure device 120 and enters the interior of the glass double-sided microstructure device 120 again for propagation, as shown in FIG. Fig. 9As shown in the optical path B in FIG. This improves the diffusion effect of the light in the glass double-sided microstructure device 120 , so that the light emitted from the second surface 122 of the glass double-sided microstructure device 120 can form a uniform surface light source.

[0043] Furthermore, the concave dots 1222 are a light-scattering structure on the light-emitting surface. The light incident on the concave dots 1222 is scattered by its curved surface and then emitted, further enhancing the diffusion effect of the glass double-sided microstructure device 120, thereby further improving the light-evening effect of the glass double-sided microstructure device 120, so that the glass double-sided microstructure device 120 can form a more uniform surface light source.

[0044] Furthermore, since the glass double-sided microstructure device 120 has a good scattering effect, it can form a uniform surface light source. Therefore, when applied to the backlight system 100, the spacing between the Mini-LED lamps on the light board 110 can be increased, thereby reducing the number of Mini-LED lamps and further reducing costs.

[0045] The glass double-sided microstructure device 120 in the present invention, while ensuring the scattering effect, is made of a glass plate, and glass can withstand higher temperatures. Therefore, the glass double-sided microstructure device 120 can be directly placed on the surface of the light board 110 to form a zero mixed light distance (OD=0) design, thereby meeting the thin thickness requirements of the backlight system 100.

[0046] Combine the following Figure 3-7 As shown, in another embodiment of the present invention, a method for manufacturing a glass double-sided microstructure device is also provided, which is used to manufacture the glass double-sided microstructure device 120 as described above. The method comprises the following steps:

[0047] S01, providing a glass plate 120', and silk-screening an acid-resistant ink pattern 130 arranged in an array on a first surface 121 of the glass plate 120';

[0048] See also Figure 3As shown, in one embodiment, when the acid-resistant ink pattern 130 is screen-printed on the first surface 121 of the glass plate 120', the array arrangement of the acid-resistant ink pattern 130 preferably corresponds to the array arrangement of the blue light Mini-LED lamp provided on the lamp board 110. Specifically, the arrangement of each of the acid-resistant ink patterns 130 and the spacing between their centers correspond to the blue light Mini-LED lamp provided on the lamp board 110. In addition, the outer diameter of the acid-resistant ink pattern 130 needs to be larger than the outer diameter of the first pit 1211 to be finally obtained (see below for details). As for the shape of the acid-resistant ink pattern 130, it is not specifically limited, for example, it can be a circular, square or other shapes. In this embodiment, the method of screen-printing acid-resistant ink on the glass plate 120' is a conventional method in the art and is not described in detail.

[0049] S02, turning over the glass plate 120' so that the first surface 121 of the glass plate 120' is located at the bottom and the second surface 122 is located at the top;

[0050] See also Figure 4 As shown, in this embodiment, the purpose of flipping the glass plate 120' is to facilitate laser processing in the next step. It is understandable that even if the glass plate 120' is not flipped, it can still be laser processed.

[0051] S03, using laser to etch at a position above the glass plate 120' corresponding to the acid-resistant ink pattern 130, so as to etch a first blind hole 1221' on the second surface 122, during which the laser not absorbed by the glass plate 120' is transmitted to the acid-resistant ink pattern 130, so as to etch an ink window 131 on the acid-resistant ink pattern 130;

[0052] Continue to view Figure 4 As shown, in this embodiment, the laser generator 300 is disposed above the glass plate 120', and the laser emitted by the laser generator 300 is used to etch the positions where the acid-resistant ink patterns 130 are disposed one by one or simultaneously, thereby etching a first blind hole 1221' on the second surface 122 above each acid-resistant ink pattern 130, and the first blind hole 1221' is tapered. In this process, the laser that is not absorbed by the glass plate 120' is propagated to the acid-resistant ink pattern 130, thereby etching an ink window 131 on the acid-resistant ink pattern 130, and the ink window 131 is circular, and the ink window 131 corresponds to the first blind hole 1221' up and down.

[0053] The etching method of the glass and the acid-resistant ink pattern 130 by the laser generator 300 is a conventional method in the art. Figure 4Of course, multiple laser generators 300 can be set to perform etching processing synchronously to improve production efficiency.

[0054] S04, reducing the laser power and continuing to etch the second surface 122, so as to etch a second blind hole 1222' on the second surface 122;

[0055] See also Figure 5 As shown, in this embodiment, the glass plate 120' is further etched by reducing the laser power using the same laser generator 300 to etch the second blind hole 1222' on the second surface 122, thereby facilitating production and improving production efficiency. In this step, a plurality of second blind holes 1222' are processed in the area between the first blind holes 1221' on the second surface 122, and the processed second blind holes 1222' are arc-shaped, and the depth of the second blind holes 1222' is less than the depth of the first blind holes 1221'.

[0056] S05, placing the glass plate 120' in a hydrofluoric acid solution, chemically etching the first surface 121 and the second surface 122 of the glass plate 120', so that the ink window 131 on the first surface 121 is recessed to form a first pit 1211, and at the same time, the first blind hole 1221' on the second surface 122 is formed into a second pit 1221, and the second blind hole 1222' is formed into a concave dot 1222;

[0057] Combination Figure 5-6 As shown, in this embodiment, when the glass plate 120' after laser etching is placed in a hydrofluoric acid solution for chemical etching, the chemical etching time needs to be controlled so that a portion of the surface of the conical first blind hole 1221' on the second surface 122 of the glass plate 120' continues to be etched away, thereby obtaining a conical second pit 1221, and at the same time, a portion of the surface of the second blind hole 1222' is also etched away to obtain an enlarged arc-shaped concave dot 1222. In this process, the ink window 131 position on the first surface 121 is etched away, so that the first surface 121 is concave to form an arc-shaped first pit 1211.

[0058] S06 , taking out the glass plate 120 ′ after chemical etching, and removing the acid-resistant ink pattern 130 on the first surface 121 , thereby obtaining a glass double-sided microstructure device 120 .

[0059] Combination Figure 6-8As shown, in this embodiment, the glass double-sided microstructure device 120 is obtained by laser etching and chemical etching using a glass plate 120', which is easy to process and the glass can withstand higher temperatures. Therefore, the glass double-sided microstructure device 120 can be directly placed on the surface of the light board 110 to form a zero mixed light distance (OD=0) design, thereby meeting the thin thickness requirements of the backlight system 100.

[0060] Combination Fig. 9 As shown, the first surface 121 is used to refract the incoming light by using the first arc-shaped first pit 1211, that is, the arc surface of the first pit 1211 refracts the light to increase the luminous angle, so that the light propagates inside the glass double-sided microstructure device 120, as shown in FIG. Fig. 9 As shown in the optical path A in FIG. 1 . When the light enters the conical surface of the second pit 1221, the light is reflected by the conical surface and the second surface 122 of the glass double-sided microstructure device 120 and enters the interior of the glass double-sided microstructure device 120 again for propagation, as shown in FIG. Fig. 9 As shown in the optical path B in FIG. 1 . This improves the diffusion effect of light in the glass double-sided microstructure device 120. At the same time, the light entering the concave grid point 1222 is scattered by its curved surface and then emitted from the second surface 122, so that the light emitted from the second surface 122 of the glass double-sided microstructure device 120 can form a uniform surface light source. On the basis of meeting the thickness requirements of the thinning, the scattering effect is further ensured.

[0061] Furthermore, since the glass double-sided microstructure device 120 has a good scattering effect, it can form a uniform surface light source. Therefore, when applied to the backlight system 100, the spacing between the Mini-LED lamps on the light board 110 can be increased, thereby reducing the number of Mini-LED lamps and further reducing costs.

[0062] Combine the following Figure 7-8 As shown, in another embodiment of the present invention, a backlight system 100 is provided, which includes a light board 110, a glass double-sided microstructure device 120, a prism film 130, a quantum dot film 140 and a brightness enhancement film 150. The structure of the glass double-sided microstructure device 120 is as described above and will not be described again.

[0063] See also Figure 8As shown, in this embodiment, a plurality of blue light Mini-LED lamps 111 arranged in an array are provided on one side of the lamp board 110, and the array arrangement of each blue light Mini-LED lamp 111 corresponds to the arrangement of the first pits 1211 of the glass double-sided microstructure device 120. In addition, the surface of each blue light Mini-LED lamp 111 is covered with a silicone lens 112. By directly forming the silicone lens 112 by dripping silicone on the surface of the blue light Mini-LED lamp 111, the thickness of the lens can be reduced, thereby making the lamp board 110 thinner, thereby meeting the thinning requirements of the entire backlight system 100. The other structures of the lamp board 110 are conventional structures in the art and will not be described in detail.

[0064] Continue to view Figure 8 As shown, in the backlight system 100 of the present invention, the first surface 121 of the glass double-sided microstructure device 120 is arranged above the lamp board 110, and each first pit 1211 corresponds to the position of each blue light Mini-LED lamp 111 one by one, thereby making the position of each blue light Mini-LED lamp 111 correspond to the position of each second pit 1221 one by one. Specifically, the glass double-sided microstructure device 120 is directly placed on the surface of the lamp board 110, and the first pit 1211 corresponds to the position of the blue light Mini-LED lamp 111 one by one. After alignment, the glass double-sided microstructure device 120 and the lamp board 110 are fixed by optically clear adhesive (OCA), thereby ensuring that the blue light Mini-LED lamp 111 corresponds to the first pit 1211 and the second pit 1221 one by one, so as to prevent the blue light Mini-LED lamp 111 from being misaligned with the first pit 1211 and the second pit 1221. Among them, OCA has the characteristics of being colorless and transparent, having a light transmittance of more than 95%, having good bonding strength, etc., can be cured at room temperature or medium temperature, and has the characteristics of small curing shrinkage, etc., so it is convenient to bond the glass double-sided microstructure device 120 and the light board 110. Of course, other special adhesives suitable for transparent optical components can also be used to bond the two.

[0065] Combination Figure 8-Figure 9As shown, in the present invention, the prism film 130 is arranged above the second surface 122 of the glass double-sided microstructure device 120. The prism film 130 is also called a prism sheet or a brightness enhancement film (BEF), which is a new type of high-performance optical film, and its outer surface presents a microscopic prism array structure, which is used to reflect strong light in the vertical normal direction to enter the glass double-sided microstructure device 120 for the second time. For the light reflected back by the prism film 130, when it enters the conical surface of the second pit 1221, it will be refracted to increase the luminous angle, so as to enter the interior of the glass double-sided microstructure device 120 again, as shown in FIG. Fig. 9 As shown in the optical path C in FIG. The diffusion effect of light in the glass double-sided microstructure device 120 is further improved, so that the light emitted from the second surface 122 of the glass double-sided microstructure device 120 can form a more uniform surface light source.

[0066] See again Figure 8 As shown, a quantum dot film (Quantum Dot Film) 140 is arranged above the prism film 130 to convert blue light into white light. Furthermore, a brightness enhancement film 150 is also arranged above the quantum dot film 140. In this embodiment, the brightness enhancement film 150 is preferably a double brightness enhancement film (Double Brightness Enhancement Film, DBEF), which is a thin film reflective polarizer that uses advanced microsphere combustion technology, so it can efficiently convert reflected light and transmitted light, thereby improving the brightness of the entire backlight system 100. Of course, the brightness enhancement film 150 can also be other optical films.

[0067] See again Fig. 9 As shown, when the backlight system 100 of the present application is working, the light emitted by each blue light Mini-LED lamp 111 on the light board 110 enters the first pit 1211 of the glass double-sided microstructure device 120. At this time, the light will be refracted by the curved surface of the first pit 1211 to increase the luminous angle, so that the light propagates inside the glass double-sided microstructure device 120, as shown in FIG. Fig. 9 When the light emitted by the blue light Mini-LED lamp 111 enters the second pit 1221 of the second surface 122, the conical surface of the second pit 1221 and the second surface 122 will reflect the light and then enter the interior of the glass double-sided microstructure device 120 again for propagation, as shown in FIG. Fig. 9 As shown in the optical path B in FIG. This improves the diffusion effect of the light in the glass double-sided microstructure device 120 , so that the light emitted from the second surface 122 of the glass double-sided microstructure device 120 can form a uniform surface light source.

[0068] In addition, when the light emitted from the second surface 122 of the glass double-sided microstructure device 120 is incident on the concave dots 1222 on the second surface 122, the light is scattered by the curved surface of the concave dots 1222 and then emitted, further enhancing the diffusion effect of the glass double-sided microstructure device 120, thereby further improving the light uniformity effect of the glass double-sided microstructure device 120, so that the glass double-sided microstructure device 120 can form a more uniform surface light source.

[0069] Furthermore, after the light emitted from the second surface 122 of the glass double-sided microstructure device 120 enters the prism film 130, the strong light in the direction perpendicular to the normal is reflected back to the glass double-sided microstructure device 120 by the prism film 130. The light reflected back by the prism film 130 and entering the conical surface of the second pit 1221 will be refracted to increase the luminous angle, and then enter the interior of the glass double-sided microstructure device 120 again, such as Fig. 9 As shown in the optical path C in FIG. The diffusion effect of light in the glass double-sided microstructure device 120 is further improved, so that the light emitted from the second surface 122 of the glass double-sided microstructure device 120 can form a more uniform surface light source.

[0070] In summary, the glass double-sided microstructure device 120 of the present invention has a first surface 121 with a plurality of first pits 1211 in an array, a second surface 122 with second pits 1221 corresponding one to one with the first pits 1211, and a plurality of recessed dots 1222 on the second surface 122. Therefore, when the light enters the first pit 1211, the light will be refracted by its concave surface to increase the luminous angle, thereby propagating inside the glass double-sided microstructure device 120, and when the light enters the second pit 1221, it will be reflected by its concave surface and the second surface 122 and enter the glass double-sided microstructure device 120 again to continue propagating, thereby enhancing the diffusion effect of the light, and then making the light emitted from the second surface 122 of the glass double-sided microstructure device 120 form a uniform surface light source; secondly, the concave dots 1222 on the second surface 122 scatter the light and then emit it, further enhancing the diffusion effect of the glass double-sided microstructure device 120, and further improving the uniform light effect of the glass double-sided microstructure device 120; furthermore, the glass double-sided microstructure device 120 is made of a glass plate, so it can withstand high temperatures, so that the glass double-sided microstructure device 120 can be directly set on the surface of the Mini-LED light board 110 to achieve zero mixed light distance, thereby meeting the thickness requirements of the thin backlight system 100.

[0071] Correspondingly, the method for manufacturing a glass double-sided microstructure device also has the above-mentioned technical effects.

[0072] In addition, the backlight system 100 using the glass double-sided microstructure device 120 of the present invention has the above-mentioned technical effects. Based on the good scattering and light-homogenizing effects of the glass double-sided microstructure device 120, the spacing between the blue light Mini-LED lamps 111 can be increased, thereby reducing the number of blue light Mini-LED lamps 111 and further reducing costs.

[0073] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A glass double-sided microstructure device, characterized in that: It comprises a first surface and a second surface arranged opposite to each other, wherein the first surface is provided with a plurality of first pits in an array, the second surface is provided with second pits corresponding to the first pits one by one, and the second surface is also provided with a plurality of concave dots.

2. The glass double-sided microstructure device according to claim 1, characterized in that: The shapes of the first pit and the second pit are the same or different.

3. The glass double-sided microstructure device according to claim 1, characterized in that: The first concave pit is arc-shaped, and the second concave pit is conical.

4. The glass double-sided microstructure device according to claim 1, characterized in that: The concave dots are arc-shaped.

5. A method for manufacturing a glass double-sided microstructure device, characterized in that: The steps include: (1) providing a glass plate, and silk-screening an acid-resistant ink pattern arranged in an array on a first surface of the glass plate; (2) turning over the glass plate so that the first surface of the glass plate is located at the bottom and the second surface of the glass plate is located at the top; (3) using a laser to perform etching at a position above the glass plate corresponding to the acid-resistant ink pattern, so as to etch a first blind hole on the second surface, during which the laser light not absorbed by the glass plate is transmitted to the acid-resistant ink pattern, thereby etching an ink window on the acid-resistant ink pattern; (4) reducing the laser power and continuing to etch the second surface to etch a second blind hole on the second surface; (5) placing the glass plate in a hydrofluoric acid solution, and chemically etching the first surface and the second surface of the glass plate, so that the ink window position on the first surface is sunken to form a first pit, and at the same time, the first blind hole on the second surface is formed into a second pit, and the second blind hole is formed into a concave dot; (6) Taking out the glass plate after chemical etching, removing the acid-resistant ink pattern on the first surface, thereby obtaining a glass double-sided microstructure device.

6. The method for manufacturing a double-sided glass microstructure device according to claim 5, characterized in that: The shapes of the first pit and the second pit are the same or different.

7. The method for manufacturing a double-sided glass microstructure device according to claim 5, characterized in that: The first pit is arc-shaped, the second pit is conical, and the concave dots are arc-shaped.

8. A backlight system, characterized in that: include: A light panel, one side of which is provided with a plurality of blue Mini-LED lights arranged in an array; The glass double-sided microstructure device according to any one of claims 1 to 4, wherein the first surface of the glass double-sided microstructure device is arranged on the lamp board, and each of the first pits corresponds to the position of each of the blue light Mini-LED lamps one by one; A prismatic film is disposed above the second surface of the glass double-sided microstructure device and is used to reflect strong light in a direction perpendicular to the normal line to enter the glass double-sided microstructure device for a second time; A quantum dot film, disposed above the prism film, for converting blue light into white light; The brightness enhancement film is arranged above the quantum dot film and is used to enhance the brightness of the backlight system.

9. The backlight system according to claim 8, wherein: The surface of each of the blue light Mini-LED lamps is covered with a silicone lens.

10. The backlight system according to claim 8, wherein: The glass double-sided microstructure device is fixed to the light board by optical glue.

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