Glass-encapsulated optical conversion device and manufacturing method thereof

Abstract

The present invention discloses a glass-encapsulated optical conversion device, comprising a glass substrate, a glass cover plate, and a sealing layer. A plurality of staggered reflective layer patterns are convexly provided on one side of the glass substrate. The reflective layer patterns separate a plurality of filling areas on the glass substrate. The filling areas are filled with a quantum dot mixed material. The sealing layer wraps around the outside of the quantum dot mixed material and the reflective layer patterns and is adhered to the surface of the glass substrate. The glass cover plate is covered on top of the sealing layer, and the glass cover plate and the glass substrate are bonded together by the sealing layer. The glass-encapsulated optical conversion device of the present invention encapsulates the quantum dot mixed material through the glass plate, and therefore has better barrier properties and good bonding and sealing properties, can meet the needs of products with high reliability requirements, and at the same time solves the problem of blue light leakage and improves the uniformity of film thickness. The present invention also discloses a method for manufacturing a glass-encapsulated optical conversion device.

Description

Technical Field

[0001] The present invention relates to the technical field of optical conversion devices, and in particular to a glass-encapsulated optical conversion device with good barrier properties and a manufacturing method thereof. Background Art

[0002] Liquid crystal displays (LCDs) require a backlight system to provide a uniform surface light source. To improve the display contrast, a dynamic partitioning backlight solution is generally used. To improve the color gamut, a blue LED light panel plus a QD (quantum dot) film solution is usually used. The function of the QD film is that when exposed to blue light, the green QD material in the QD film absorbs the blue light and converts it into green light, while the red QD material absorbs the blue light and converts it into red light. The green and red light generated by the QD film are mixed with the unabsorbed blue light to form white light, which becomes the backlight source of the LCD.

[0003] The existing QD film adopts a "sandwich" structure, that is, the QD material is encapsulated between two PET barrier films. Since the QD material is sensitive to water and oxygen, it is necessary to prevent water vapor and oxygen from entering the QD material. Therefore, an inorganic film needs to be made on the surface of the PET film to block water vapor and oxygen. This PET with an inorganic film is also called a barrier film. The barrier film has a certain barrier effect on water vapor and oxygen and can meet the reliability requirements of ordinary products. However, for products with very high reliability requirements, such as automotive products, outdoor product displays, etc., the existing barrier films cannot meet their reliability requirements. Taking automotive products as an example, due to the thickness limit of the barrier film of the existing QD film, the barrier performance against water vapor and oxygen cannot be further improved, and cannot meet the product requirements of automobiles.

[0004] In order to solve the problem that the barrier performance of existing barrier films cannot meet the requirements, one way is to use glass as a barrier material to encapsulate QD materials. However, since glass is not as soft as a diaphragm and can be curled, but is a relatively hard flat material, using a glass flat plate to encapsulate QD materials requires solving the problems of film thickness uniformity of the QD material, blue light leakage, and sealing and bonding between glass.

[0005] Therefore, it is necessary to provide a glass-encapsulated photoconversion device and a manufacturing method thereof that have good barrier properties and film thickness uniformity and can overcome the blue light leakage problem and the sealing and bonding problem, so as to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a glass-encapsulated optical conversion device with good barrier properties and uniform film thickness, and capable of overcoming the problems of blue light leakage and sealing and bonding.

[0007] Another object of the present invention is to provide a method for manufacturing a glass-encapsulated optical conversion device that can make the glass-encapsulated optical conversion device have good barrier properties and film thickness uniformity, and can overcome the problems of blue light leakage and sealing and bonding.

[0008] To achieve the above-mentioned objectives, the technical solution of the present invention is as follows: providing a glass-encapsulated optical conversion device, which includes a glass substrate, a glass cover plate and a sealing layer; wherein, a plurality of staggered reflective layer patterns are convexly provided on one side surface of the glass substrate, and the reflective layer patterns separate a plurality of filling areas on the glass substrate, and the filling areas are filled with a quantum dot mixed material; the sealing layer is wrapped around the outside of the quantum dot mixed material and the reflective layer patterns and adhered to the surface of the glass substrate; the glass cover plate is covered on top of the sealing layer, and the glass cover plate and the glass substrate are bonded together by the sealing layer.

[0009] Preferably, the glass-encapsulated photoconversion device further includes multiple dam patterns, positioned above the reflective layer pattern. Together, the dams and reflective layer patterns form the perimeter of the filling area, and the sealing layer further wraps around the dam patterns. Because the quantum dot hybrid material and the reflective layer pattern have relatively poor bonding and easily separate, gaps form at the edges of the filling area, allowing blue light to directly penetrate the device through these gaps, leading to blue light leakage. Therefore, a further dam pattern is formed on the surface of the reflective layer pattern. This dam pattern provides even stronger bonding with the quantum dot hybrid material, thereby preventing the formation of gaps and further addressing the blue light leakage issue.

[0010] Preferably, the width of the dam glue pattern is smaller than or larger than the width of the reflective layer pattern. In this way, the side of the dam glue pattern and the binding position of the quantum dot mixed material, and the side of the reflective layer pattern and the binding position of the quantum dot mixed material are staggered in the height direction. Through the close combination of the dam glue pattern and the quantum dot mixed material, the generation of gaps at the binding position of the side of the reflective layer pattern and the quantum dot mixed material can be better avoided, thereby better solving the problem of blue light leakage.

[0011] Preferably, after the quantum dot mixed material is filled in the filling area, it is closely attached to the sides of the dam glue pattern and the reflective layer pattern, and the quantum dot mixed material is flush with the top of the dam glue pattern.

[0012] Preferably, the reflective layer pattern is formed by metal material or white reflective ink, and the quantum dot mixed material is formed by mixing quantum dot material, UV glue and additives.

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

[0014] (1) providing a glass substrate, and forming a plurality of staggered reflective layer patterns on one side of the glass substrate, wherein the reflective layer patterns protrude from the side of the glass substrate, thereby separating a plurality of filling areas on the glass substrate;

[0015] (2) filling the filling area with a quantum dot mixed material and curing the quantum dot mixed material;

[0016] (3) applying encapsulation glue on the surface of the quantum dot mixed material, the reflective layer pattern and the glass substrate, so that the encapsulation glue completely wraps the outside of the quantum dot mixed material and the reflective layer pattern, thereby obtaining a sealing glue layer;

[0017] (4) providing a glass cover plate, and pressing the glass cover plate onto the top of the sealing layer so that the glass cover plate and the glass substrate are bonded together through the sealing layer;

[0018] (5) UV curing is performed on the bonded glass substrate and the glass cover to obtain a complete glass-encapsulated photoconversion device.

[0019] Preferably, in the method for manufacturing a glass-encapsulated photoconversion device of the present invention, the step (2) further includes the following steps:

[0020] The dam glue pattern is positioned above the reflective layer pattern, and together with the reflective layer pattern, it forms the perimeter of the filling area. Because the quantum dot hybrid material and the reflective layer pattern have relatively poor bonding strength and easily separate, gaps form at the edges of the filling area. Blue light can directly penetrate the device through these gaps, causing blue light leakage. Therefore, a second dam glue pattern is formed on the surface of the reflective layer pattern. This dam glue pattern has even better bonding strength with the quantum dot hybrid material, thus preventing the formation of gaps and further resolving the blue light leakage issue.

[0021] Preferably, in the manufacturing method of the glass-encapsulated photoconversion device of the present invention, the width of the dam glue pattern is smaller than or larger than the width of the reflective layer pattern. In this way, the side of the dam glue pattern and the binding position of the quantum dot mixed material, and the side of the reflective layer pattern and the binding position of the quantum dot mixed material are staggered in the height direction. Through the close combination of the dam glue pattern and the quantum dot mixed material, the generation of gaps at the binding position of the side of the reflective layer pattern and the quantum dot mixed material can be better avoided, thereby better solving the problem of blue light leakage.

[0022] Preferably, in the glass-encapsulated photoconversion device manufacturing method of the present invention, the quantum dot hybrid material is filled in the filling area and is closely attached to the sides of the dam glue pattern and the reflective layer pattern, and the quantum dot hybrid material is flush with the top of the dam glue pattern.

[0023] Preferably, in the method for manufacturing a glass-encapsulated photoconversion device of the present invention, the reflective layer pattern is formed by metal material or white reflective ink, and the quantum dot mixed material is obtained by uniformly mixing quantum dot material, UV glue, and additives.

[0024] Compared with the prior art, the glass-encapsulated photoconversion device of the present invention, firstly, utilizes the thickness of the reflective layer pattern to determine the film thickness of the quantum dot hybrid material, so that the film thickness of the quantum dot hybrid material can be precisely controlled, thereby improving the uniformity of the film thickness of the quantum dot hybrid material; secondly, the reflective layer pattern between the filling areas can reflect blue light back, so that the blue light cannot penetrate through, thereby solving the problem of blue light leakage; furthermore, the sealing layer is wrapped around the outside of the quantum dot hybrid material and the reflective layer pattern and adhered to the surface of the glass substrate, and the glass substrate and the glass cover plate are bonded together by the sealing layer, thereby obtaining better fitting and sealing properties; finally, the glass substrate and the glass cover plate have good barrier properties, which can better block water vapor and oxygen, thereby making the glass-encapsulated photoconversion device have better barrier properties, and can meet the needs of products with high reliability requirements.

[0025] Correspondingly, the method for manufacturing a glass-encapsulated photoconversion device of the present invention also has the same technical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a top view of a reflective layer pattern provided on a glass substrate in the present invention.

[0027] Figure 2 is Figure 1 A top view of a dam glue pattern set on a reflective layer pattern in FIG.

[0028] Figure 3 yes Figure 2 sectional view of .

[0029] Figure 4 is Figure 2 A top view of the filling area after filling with quantum dot mixed material.

[0030] Figure 5 is Figure 4 A cross-sectional view of forming a sealing layer on a glass substrate in FIG.

[0031] Figure 6 The glass cover is pressed onto Figure 5 Schematic diagram of the state of the glass substrate in .

[0032] Figure 7 It is a cross-sectional view of the glass-encapsulated light conversion device of the present invention.

[0033] Figure 8This is a cross-sectional view of the glass-encapsulated light conversion device of the present invention in cooperation with the blue light panel. DETAILED DESCRIPTION

[0034] The embodiments of the present invention will now be 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, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting 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.

[0035] First see Figure 7 As shown, the glass-encapsulated photoconversion device 100 provided by the present invention includes a glass substrate 110, a glass cover plate 120, and a sealing layer 130. A plurality of staggered reflective layer patterns 140 are convexly provided on one side of the glass substrate 110. The reflective layer patterns 140 separate a plurality of filling areas 160 on the glass substrate 110. Each filling area 160 is filled with a quantum dot (QD) mixed material 170. The sealing layer 130 wraps around the quantum dot mixed material 170 and the reflective layer patterns 140 and is adhered to the surface of the glass substrate 110. That is, a sealed space is formed between the sealing layer 130 and the glass substrate 110 to completely encapsulate the quantum dot mixed material 170 and the reflective layer patterns 140. The glass cover plate 120 is covered on the sealing layer 130, and the sealing layer 130 is used to bond the glass cover plate 120 and the glass substrate 110 together. Among them, the reflective layer pattern 140 can reflect the blue light entering the glass substrate 110 back, so that the blue light cannot penetrate through it, thereby solving the problem of blue light leakage. At the same time, the thickness of the reflective layer pattern 140 can also be used to determine the film thickness of the QD mixed material 170, thereby improving the uniformity of the film thickness of the QD mixed material 170.

[0036] Combine Figure 5 、 Figure 7 As shown, in the present invention, the thickness of the sealing layer 130 from the top surface to the glass substrate 110 is greater than the thickness of the reflective layer pattern 140. In this way, on the one hand, the quantum dot hybrid material 170 and the reflective layer pattern 140 are completely encapsulated inside the sealing layer 130. On the other hand, the thickness of the sealing layer 130 is sufficient to ensure that the glass substrate 110 and the glass cover plate 120 can be well adhered together through the sealing layer 130, thereby obtaining a higher fit and sealing performance, thereby solving the sealing problem between the two glass plates.

[0037] The following combination Figure 2-3 、 Figure 7 As shown, in one embodiment of the present invention, the glass-encapsulated optical conversion device 100 further includes a plurality of dam glue patterns 150, which are arranged above the reflective layer pattern 140. The dam glue patterns 150 and the reflective layer pattern 140 together form the edge of the filling area 160 (see FIG. Figure 3 ). Therefore, the thickness of the QD mixed material 170 is jointly determined by the thickness of the dam glue pattern 150 and the reflective layer pattern 140. Since the thickness of the dam glue pattern 150 and the reflective layer pattern 140 is easy to set and shape, it is easy to accurately control the film thickness of the QD mixed material 170, so that the uniformity of the film thickness of the QD mixed material 170 is improved. In addition, the setting of the dam glue pattern 150 can improve the problem of relatively poor bonding between the QD mixed material 170 and the reflective layer pattern 140. Specifically, since the bonding between the QD mixed material 170 and the reflective layer pattern 140 is relatively poor, the two are easily separated, thereby easily generating gaps at the edge of the filling area 160, so that blue light can directly penetrate the device from the gap, resulting in the problem of blue light leakage. The present invention makes another layer of dam glue pattern 150 on the surface of the reflective layer pattern 140, and the bonding between the dam glue pattern 150 and the QD mixed material 170 is better. Through the close combination of the two, the generation of gaps can be avoided, thereby further solving the problem of blue light leakage. In other words, the present invention can more effectively solve the blue light leakage problem by disposing the dam glue pattern 150 and the reflective layer pattern 140 .

[0038] Continue to combine Figure 2-3 、 Figure 7 As shown, in the present invention, the width of the dam glue pattern 150 is preferably smaller than or larger than the width of the reflective layer pattern 140. In this way, the side surfaces of the dam glue pattern 150 and the reflective layer pattern 140 form a step-like shape. After the QD hybrid material 170 is filled, the bonding position between the side surface of the dam glue pattern 150 and the QD hybrid material 170, and the bonding position between the side surface of the reflective layer pattern 140 and the QD hybrid material 170 are dislocated in the height direction. That is, the two bonding positions are not located in the same vertical plane, so that the QD hybrid material 170 or the dam glue pattern 150 is located above the bonding position between the side surface of the reflective layer pattern 140 and the QD hybrid material 170. In addition, the dam glue pattern 150 and the QD hybrid material 170 are tightly bonded, so that a gap can be avoided at the bonding position between the side surface of the reflective layer pattern 140 and the QD hybrid material 170, thereby better solving the blue light leakage problem.

[0039] See Figure 3 、 Figure 5As shown, in one embodiment of the present invention, the width of the dam pattern 150 is smaller than the width of the reflective layer pattern 140. In this way, after the QD hybrid material 170 is filled, the QD hybrid material 170 is located above the junction of the side surface of the reflective layer pattern 140 and the QD hybrid material 170 (see FIG. Figure 5 ), and the QD hybrid material 170 is closely attached to the side of the dam glue pattern 150, thereby avoiding the formation of gaps at the bonding position between the side of the reflective layer pattern 140 and the QD hybrid material 170, thereby better solving the blue light leakage problem.

[0040] The following combination Figure 4-5 、 Figure 7 As shown, in the present invention, the QD mixed material 170 is filled in the filling area 160 and is close to the side of the dam glue pattern 150 and the reflective layer pattern 140, and the QD mixed material 170 is flush with the top of the dam glue pattern 150 (see Figure 5 ), thereby making the film thickness of the QD mixed material 170 consistent and being able to precisely control the film thickness uniformity of the QD mixed material 170.

[0041] See again Figure 1 As shown, in one embodiment of the present invention, the reflective layer pattern 140 specifically includes a first reflective layer pattern 140a arranged horizontally and a second reflective layer pattern 140b arranged vertically. Multiple first reflective layer patterns 140a are arranged in parallel, and multiple second reflective layer patterns 140b are also arranged in parallel. The outermost first reflective layer patterns 140a and second reflective layer patterns 140b are connected end to end to form a closed structure. More preferably, the first reflective layer patterns 140a and second reflective layer patterns 140b are arranged perpendicular to each other, and the first reflective layer patterns 140a and second reflective layer patterns 140b separate multiple rectangular filling areas 160. That is, the four sidewalls of each filling area 160 are surrounded by the perpendicular first reflective layer patterns 140a and second reflective layer patterns 140b. The first reflective layer patterns 140a and second reflective layer patterns 140b can reflect blue light entering the glass substrate 110 back, preventing it from passing through, thereby solving the problem of blue light leakage.

[0042] In one embodiment, the thickness of the QD hybrid material 170 is determined by the thickness of the first reflective layer pattern 140a and the second reflective layer pattern 140b, which can accurately control the thickness of the QD hybrid material 170 and improve the uniformity of the thickness of the QD hybrid material 170.

[0043] It is understandable that the first reflective layer patterns 140a and the second reflective layer patterns 140b may also be arranged non-vertically, and it is also feasible to arrange them in a staggered manner at other angles.

[0044] Combine Figure 2-3As shown, in a more preferred embodiment, the dam glue pattern 150 includes a first dam glue pattern 150a arranged horizontally and a second dam glue pattern 150b arranged vertically. The first dam glue pattern 150a is arranged above the first reflective layer pattern 140a, and the second dam glue pattern 150b is arranged above the second reflective layer pattern 140b. In addition, the length and width of the first dam glue pattern 150a are slightly smaller than the length and width of the first reflective layer pattern 140a, and the length and width of the second dam glue pattern 150b are slightly smaller than the length and width of the second reflective layer pattern 140b. In this way, a step is formed between the first dam glue pattern 150a and the first reflective layer pattern 140a, and between the second dam glue pattern 150b and the second reflective layer pattern 140b, see FIG. Figure 3 shown.

[0045] The following combination Figure 4-5 As shown, after the QD hybrid material 170 is filled, in each filling area 160, the upper portion of the QD hybrid material 170 is closely attached to the first dam glue pattern 150a and the second dam glue pattern 150b, and the lower portion thereof is closely attached to the first reflective layer pattern 140a and the second reflective layer pattern 140b. The QD hybrid material 170 is located above the bonding position between the first reflective layer pattern 140a, the second reflective layer pattern 140b and the QD hybrid material 170 (see FIG. Figure 5 ), due to the close combination between the QD mixed material 170 and the first dam glue pattern 150a and the second dam glue pattern 150b, it is possible to avoid the generation of gaps at the bonding positions of the first reflective layer pattern 140a, the second reflective layer pattern 140b and the QD mixed material 170, thereby better solving the blue light leakage problem.

[0046] Recombination Figure 1-7 As shown, in one embodiment of the present invention, the QD hybrid material 170 is formed by uniformly mixing quantum dot materials, UV (Ultraviolet Rays) glue, and additives. Of course, the QD hybrid material 170 is not limited to that in this embodiment, and the selection and formation of the QD hybrid material 170 are conventional methods in the art and therefore will not be described in detail.

[0047] In one embodiment of the present invention, the reflective layer pattern 140 can be formed of a metal material, such as silver to form a silver reflective layer, aluminum to form an aluminum reflective layer, etc., or can be formed of organic white reflective ink. Of course, it is not limited to the aforementioned materials and can also be formed of other materials.

[0048] The following combination Figure 7-8As shown, the glass-encapsulated photoconversion device 100 of the present invention is combined with a blue light panel 200 to form a backlight module. The blue light panel 200 is located below the glass substrate 110. This allows the blue light emitted by the blue light panel 200 to enter the QD hybrid material 170 within the filling region 160, thereby exciting the QD material and producing white light.

[0049] It should be noted that Figure 8 The blue light board 200 shown in FIG is merely a schematic structure and is not intended to limit the present invention. Furthermore, the specific structure of the blue light board 200 is conventional in the art and will not be described in detail.

[0050] Combine again below Figure 1-7 As shown, the manufacturing method of the glass-encapsulated optical conversion device provided by the present invention is described, and the manufacturing method includes the following steps:

[0051] S01. Providing a glass substrate 110, forming a plurality of staggered reflective layer patterns 140 on one side of the glass substrate 110, wherein the reflective layer patterns 140 protrude from the side of the glass substrate 110, thereby separating a plurality of filling areas 160 on the glass substrate 110;

[0052] Specific combination Figure 1 、 Figure 3 As shown, the reflective layer pattern 140 includes a first reflective layer pattern 140a arranged horizontally and a second reflective layer pattern 140b arranged vertically. Multiple first reflective layer patterns 140a are arranged in parallel, and multiple second reflective layer patterns 140b are also arranged in parallel. The outermost first reflective layer patterns 140a and second reflective layer patterns 140b are connected end-to-end to form a closed structure. More preferably, the first reflective layer patterns 140a and second reflective layer patterns 140b are arranged perpendicular to each other, and the first reflective layer patterns 140a and second reflective layer patterns 140b separate multiple rectangular filling areas 160. That is, the four sidewalls of each filling area 160 are surrounded by the perpendicular first reflective layer patterns 140a and second reflective layer patterns 140b. The first reflective layer patterns 140a and second reflective layer patterns 140b can reflect blue light entering the glass substrate 110 back, preventing it from passing through, thereby solving the problem of blue light leakage.

[0053] In this embodiment, the thickness of the QD hybrid material 170 is determined by the thickness of the first reflective layer pattern 140a and the second reflective layer pattern 140b, which can accurately control the thickness of the QD hybrid material 170 and improve the uniformity of the thickness of the QD hybrid material 170.

[0054] It is understandable that the first reflective layer patterns 140a and the second reflective layer patterns 140b may also be arranged non-vertically, and it is also feasible to arrange them in a staggered manner at other angles.

[0055] In one embodiment of the present invention, the reflective layer pattern 140 can be formed of a metal material, such as silver to form a silver reflective layer, aluminum to form an aluminum reflective layer, etc., or can be formed of organic white reflective ink. Of course, it is not limited to the aforementioned materials and can also be formed of other materials.

[0056] S02, filling the filling area 160 with a quantum dot mixed material, and curing the quantum dot mixed material;

[0057] Combine Figure 3-Figure 5 As shown, in the present invention, after the QD hybrid material 170 is filled in the filling area 160, it is preferably made flush with the top of the reflective layer pattern 140. In this way, the film thickness of the QD hybrid material 170 is directly controlled, the film thickness of the QD hybrid material 170 is made uniform, and the film thickness uniformity of the QD hybrid material 170 can be precisely controlled. The QD hybrid material 170 is then cured using UV (Ultraviolet Rays) light.

[0058] In one embodiment of the present invention, the QD hybrid material 170 is formed by uniformly mixing quantum dot material, UV (Ultraviolet Rays) glue, and additives. Of course, the QD hybrid material 170 is not limited to that in this embodiment, and the selection and formation of the QD hybrid material 170 are conventional in the art and are therefore not described in detail.

[0059] S03, applying encapsulation glue on the surfaces of the quantum dot mixed material, the reflective layer pattern 140 and the glass substrate 110, so that the encapsulation glue completely wraps the quantum dot mixed material and the reflective layer pattern 140, thereby forming a sealing layer 130;

[0060] Continue to combine Figure 4-Figure 5 As shown, encapsulation glue is applied on top of the glass substrate 110 and the QD mixed material 170 to obtain a sealing layer 130, so that the thickness from the top surface of the sealing layer 130 to the glass substrate 110 is greater than the thickness of the reflective layer pattern 140. In this way, on the one hand, the quantum dot mixed material 170 and the reflective layer pattern 140 are completely encapsulated inside the sealing layer 130, and on the other hand, the thickness of the sealing layer 130 is sufficient to ensure that the glass substrate 110 and the glass cover plate 120 can be well adhered together through the sealing layer 130, thereby obtaining a higher fit and sealing, thereby solving the sealing problem between the two glass plates.

[0061] S04, providing a glass cover plate 120, and pressing the glass cover plate 120 onto the sealing layer 130, so that the glass cover plate 120 and the glass substrate 110 are bonded together through the sealing layer 130;

[0062] S05 , performing UV (Ultraviolet Rays) curing on the bonded glass substrate 110 and the glass cover plate 120 to obtain a complete glass-packaged photoconversion device 100 .

[0063] Recombination Figure 1-7 As shown, in a more preferred embodiment of the method for manufacturing a glass-encapsulated photoconversion device of the present invention, the following steps are further included before step S02:

[0064] S01′, disposing the dam glue pattern 150 above the reflective layer pattern 140 , so that the dam glue pattern 150 and the reflective layer pattern 140 together form the edge of the filling area 160 .

[0065] Combine Figure 2-3 As shown, since the bonding strength between the QD hybrid material 170 and the reflective layer pattern 140 is relatively poor and easily separated, gaps are easily formed at the edge of the filling area 160, allowing blue light to directly penetrate the device through these gaps, resulting in blue light leakage. Therefore, this embodiment forms a dam glue pattern 150 on the surface of the reflective layer pattern 140. Since the dam glue pattern 150 has a stronger bonding strength with the QD hybrid material 170, the generation of gaps can be avoided, thereby further solving the blue light leakage problem. In other words, the present invention can more effectively solve the blue light leakage problem through the provision of the dam glue pattern 150 and the reflective layer pattern 140.

[0066] Furthermore, the thickness of the dam glue pattern 150 and the reflective layer pattern 140 are easy to control during the manufacturing process, so the thickness of the QD mixed material 170 is jointly determined by the thickness of the two, which facilitates precise control of the film thickness of the QD mixed material 170 and improves the uniformity of the film thickness of the QD mixed material 170.

[0067] Continue to combine Figure 2-3 、 Figure 7As shown, in the present invention, the width of the dam glue pattern 150 is preferably smaller than or larger than the width of the reflective layer pattern 140. In this way, the side surfaces of the dam glue pattern 150 and the reflective layer pattern 140 form a step-like shape. After the QD hybrid material 170 is filled, the side surfaces of the dam glue pattern 150 and the QD hybrid material 170 bonding position, and the side surfaces of the reflective layer pattern 140 and the QD hybrid material 170 bonding position are dislocated in the height direction. That is, the two bonding positions are not located in the same vertical plane, so that the QD hybrid material 170 or the dam glue pattern 150 is located above the bonding position between the side surfaces of the reflective layer pattern 140 and the QD hybrid material 170. In addition, the dam glue pattern 150 and the QD hybrid material 170 are tightly bonded, so that a gap can be avoided at the bonding position between the side surfaces of the reflective layer pattern 140 and the QD hybrid material 170, thereby better solving the blue light leakage problem.

[0068] See Figure 3 、 Figure 5 As shown, in one embodiment of the present invention, the width of the dam glue pattern 150 is smaller than the width of the reflective layer pattern 140. In this way, after the QD mixed material 170 is filled, the QD mixed material 170 is located above the junction between the side surface of the reflective layer pattern 140 and the QD mixed material 170 (see FIG. Figure 5 ), and the QD hybrid material 170 is closely attached to the side of the dam glue pattern 150, thereby avoiding the formation of gaps at the bonding position between the side of the reflective layer pattern 140 and the QD hybrid material 170, thereby better solving the blue light leakage problem.

[0069] Continue to read Figure 2 As shown, in this embodiment, the dam glue pattern 150 includes a first dam glue pattern 150a arranged horizontally and a second dam glue pattern 150b arranged vertically. The first dam glue pattern 150a is arranged above the first reflective layer pattern 140a, and the second dam glue pattern 150b is arranged above the second reflective layer pattern 140b. In addition, the length and width of the first dam glue pattern 150a are slightly smaller than the length and width of the first reflective layer pattern 140a, and the length and width of the second dam glue pattern 150b are slightly smaller than the length and width of the second reflective layer pattern 140b. In this way, a step is formed between the first dam glue pattern 150a and the first reflective layer pattern 140a, and between the second dam glue pattern 150b and the second reflective layer pattern 140b, see FIG. Figure 3 shown.

[0070] Combine Figure 4-5As shown, after the QD hybrid material 170 is filled, in each filling area 160, the upper portion of the QD hybrid material 170 is closely attached to the first dam glue pattern 150a and the second dam glue pattern 150b, and the lower portion thereof is closely attached to the first reflective layer pattern 140a and the second reflective layer pattern 140b. The QD hybrid material 170 is located above the bonding position between the first reflective layer pattern 140a, the second reflective layer pattern 140b and the QD hybrid material 170 (see FIG. Figure 5 ), due to the close combination between the QD mixed material 170 and the first dam glue pattern 150a and the second dam glue pattern 150b, it is possible to avoid the generation of gaps at the bonding positions of the first reflective layer pattern 140a, the second reflective layer pattern 140b and the QD mixed material 170, thereby better solving the blue light leakage problem.

[0071] Preferably, after the QD mixed material 170 is filled in the filling area 160, it is closely attached to the sides of the dam glue pattern 150 and the reflective layer pattern 140, and the QD mixed material 170 is flush with the top of the dam glue pattern 150, thereby precisely controlling the film thickness of the QD mixed material 170 and improving the uniformity of the film thickness of the QD mixed material 170.

[0072] Recombination Figure 1-7 As shown, the glass-encapsulated photoconversion device 100 obtained by the manufacturing method of the present invention encapsulates the quantum dot mixed material 170 through the glass substrate 110 and the glass cover plate 120. Since the glass plate has good barrier properties, the barrier properties of the glass-encapsulated photoconversion device 100 are improved, thereby meeting the product demand for high reliability requirements.

[0073] In summary, the glass-encapsulated photoconversion device 100 of the present invention, firstly, utilizes the thickness of the reflective layer pattern 140 to determine the film thickness of the quantum dot hybrid material 170, so that the film thickness of the quantum dot hybrid material 170 can be precisely controlled, thereby improving the film thickness uniformity of the quantum dot hybrid material 170; secondly, the reflective layer pattern 140 between the filling area 160 can reflect blue light back, so that the blue light cannot penetrate through, thereby solving the problem of blue light leakage; furthermore, the sealing layer 130 is wrapped around the outside of the quantum dot hybrid material 170 and the reflective layer pattern 140 and adhered to the surface of the glass substrate 110, and the glass substrate 110 and the glass cover plate 120 are bonded together by the sealing layer 130, so that better bonding and sealing can be obtained; finally, the glass substrate 110 and the glass cover plate 120 have good barrier properties, which can better block water vapor and oxygen, so that the glass-encapsulated photoconversion device has better barrier properties and can meet the needs of products with high reliability requirements.

[0074] Correspondingly, the method for manufacturing a glass-encapsulated optical conversion device of the present invention also has the same technical effect.

[0075] The structures of the blue light panel 200 and other parts of the backlight module involved in the present invention are conventional structures well known to those skilled in the art and will not be described in detail here.

[0076] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope 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 of the present invention.

Claims

1. A glass-encapsulated light conversion device, characterized in that: include: A glass substrate, one side of which is convexly provided with a plurality of staggered reflective layer patterns, wherein the reflective layer patterns separate a plurality of filling areas on the glass substrate, and the filling areas are filled with a quantum dot mixed material; a plurality of dam glue patterns, wherein the dam glue patterns are arranged above the reflective layer patterns, and the dam glue patterns and the reflective layer patterns together form the periphery of the filling area; a sealing layer, which wraps around the quantum dot mixed material, the reflective layer pattern, and the dam glue pattern and is adhered to the surface of the glass substrate; The glass cover plate is arranged on the top of the sealing layer, and the glass cover plate and the glass substrate are bonded together through the sealing layer.

2. The glass-encapsulated light-conversion device according to claim 1, wherein: The width of the dam glue pattern is smaller than or larger than the width of the reflective layer pattern.

3. The glass-encapsulated light-conversion device according to claim 1, wherein: After the quantum dot mixed material is filled in the filling area, it is closely attached to the side surfaces of the dam glue pattern and the reflective layer pattern, and the quantum dot mixed material is flush with the top of the dam glue pattern.

4. The glass-encapsulated light-conversion device according to claim 1, wherein: The reflective layer pattern is formed by metal material or white reflective ink, and the quantum dot mixed material is formed by mixing quantum dot material, UV glue and additives.

5. A method for manufacturing a glass-encapsulated photoconversion device, characterized in that: The steps include: (1) Providing a glass substrate, and forming a plurality of staggered reflective layer patterns on one side of the glass substrate, wherein the reflective layer patterns protrude from the side of the glass substrate, thereby separating a plurality of filling areas on the glass substrate; (2) a dam glue pattern is provided above the reflective layer pattern, wherein the dam glue pattern and the reflective layer pattern together form the edge of the filling area; (3) filling the filling area with a quantum dot mixed material and curing the quantum dot mixed material; (4) applying encapsulation glue on the surface of the quantum dot mixed material, the reflective layer pattern, the dam glue pattern and the glass substrate, so that the encapsulation glue completely wraps the outside of the quantum dot mixed material, the reflective layer pattern and the dam glue pattern, thereby obtaining a sealing glue layer; (5) Providing a glass cover plate, and pressing the glass cover plate onto the top of the sealing layer so that the glass cover plate and the glass substrate are bonded together through the sealing layer; (6) UV curing is performed on the bonded glass substrate and the glass cover to obtain a complete glass-encapsulated light conversion device.

6. The method for manufacturing a glass-encapsulated optical conversion device according to claim 5, wherein: The width of the dam glue pattern is smaller than or larger than the width of the reflective layer pattern.

7. The method for manufacturing a glass-encapsulated optical conversion device according to claim 5, wherein: After the quantum dot mixed material is filled in the filling area, it is closely attached to the side surfaces of the dam glue pattern and the reflective layer pattern, and the quantum dot mixed material is flush with the top of the dam glue pattern.

8. The method for manufacturing a glass-encapsulated photoconversion device according to claim 5, wherein: The reflective layer pattern is formed by metal material or white reflective ink, and the quantum dot mixed material is obtained by uniformly mixing quantum dot material, UV glue, and additives.

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