Light-emitting panel, preparation method thereof and display device

Abstract

The invention provides a light-emitting panel, a preparation method of the light-emitting panel and a display device. The light-emitting panel comprises a glass-based lamp panel and a second glass substrate. The glass-based lamp panel comprises a light-emitting area and a frame area surrounding the light-emitting area. The glass-based lamp panel comprises a first glass substrate and a plurality of light-emitting units arranged on a light-emitting area corresponding to the first glass substrate. The second glass substrate is arranged on the light-emitting side of the glass-based lamp panel and covers the light-emitting area and at least part of the frame area. The first glass substrate and the second glass substrate are fixed through a welding structure located in the frame area. The welding structure surrounds and seals the light-emitting area. Wherein the welding structure can be softened under the irradiation of laser with preset power and enables the first glass substrate and the second glass substrate to be separated. According to the light-emitting panel, the anti-cracking strength and the pressure resistance of the glass substrate can be improved, and the defects that a large-size glass substrate is fragile and low in yield are effectively overcome; the light emitting efficiency can also be improved; and a water vapor invasion path can be blocked, and the repair efficiency is effectively improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a light-emitting panel, its preparation method, and a display device. Background Technology

[0002] To improve display quality, existing liquid crystal displays (LCDs) largely employ glass-based display solutions using micro light-emitting diodes (Micro LEDs) or mini light-emitting diodes (Mini LEDs). However, the fragility and low pressure resistance of glass substrates lead to low yield rates for large-size displays. Furthermore, while encapsulating resins (such as epoxy-modified nitrile rubber) can provide moisture protection and improve impact resistance, rework requires partial glue removal, laser repair, and other processes. The three-step glue re-application process leaves repair marks on the surface of the LED board, affecting the display effect. In addition, moisture intrusion causes metal ion migration (such as silver and copper) to form dendrites, resulting in short circuits or dead LEDs. Summary of the Invention

[0003] This application provides a light-emitting panel and its preparation method, as well as a display device, which aims to solve the problems of low glass substrate yield, easy moisture intrusion, and low rework efficiency in existing light-emitting panels.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a light-emitting panel, comprising: A glass-based lamp panel; the glass-based lamp panel includes a light-emitting area and a border area surrounding the light-emitting area; the glass-based lamp panel includes a first glass substrate and a plurality of light-emitting units disposed on the first glass substrate corresponding to the light-emitting area; A second glass substrate is disposed on the light-emitting side of the glass-based lamp plate and covers the light-emitting area and at least part of the frame area; The first glass substrate and the second glass substrate are fixed by a welding structure located in the frame region; and the welding structure surrounds and seals the light-emitting area. The welding structure can be softened and separated from the first glass substrate and the second glass substrate under laser irradiation of a preset power.

[0005] In one specific embodiment, the light-emitting unit is a micro light-emitting diode or a sub-millimeter light-emitting diode; wherein the size of the light-emitting unit is greater than or equal to 1 micrometer and less than or equal to 100 micrometers; The second glass substrate is disposed at intervals with the plurality of light-emitting units on the side surface of the second glass substrate near the first glass substrate; The welding structure is arranged between the first glass substrate and the second glass substrate, and one end of the welding structure is connected to the first glass substrate and the other end is connected to the second glass substrate.

[0006] In an embodiment, the distance between the first glass substrate and the second glass substrate is greater than or equal to 50 microns and less than or equal to 300 microns.

[0007] In an embodiment, the light emitting unit is a micro light emitting diode or a submillimeter light emitting diode; the size of the light emitting unit is greater than or equal to 1 micron and less than or equal to 100 microns; the side surface of the second glass substrate close to the first glass substrate has a plurality of grooves; the plurality of grooves correspond to the plurality of light emitting units one by one, and each light emitting unit is embedded in the corresponding groove.

[0008] In an embodiment, the depth of the groove is greater than or equal to 50 microns and less than or equal to 300 microns.

[0009] In an embodiment, the welding structure includes at least one of polyamide, epoxy resin, and unsaturated polyester resin.

[0010] To solve the above technical problems, another technical solution adopted by the present application is to provide another display device, comprising: The light emitting panel is the light emitting panel according to any one of claims 1-6; the light emitting unit of the light emitting panel is a submillimeter light emitting diode; the size of the submillimeter light emitting diode is greater than or equal to 50 microns and less than or equal to 100 microns; The display panel is arranged on the light emitting side of the light emitting panel.

[0011] In an embodiment, the light emitting panel is a direct backlight module; the second glass substrate of the light emitting panel is a glass-based diffusion plate; or The light emitting panel is a side-in backlight module; the second glass substrate of the light emitting panel is a glass-based light guide plate.

[0012] To solve the above technical problems, another technical solution adopted by the present application is to provide a preparation method of a light emitting panel, comprising: Providing a glass-based light panel; the glass-based light panel includes a light emitting area and a frame area surrounding the light emitting area; the glass-based light panel includes a first glass substrate and a plurality of light emitting units arranged on the first glass substrate corresponding to the light emitting area; Covering the second glass substrate on the light emitting side of the glass-based light panel and making the second glass substrate cover the light emitting area and at least part of the frame area; Laser welding is performed on the first glass substrate and the second glass substrate at positions corresponding to the frame area to form a welded structure that surrounds and seals the light-emitting area; the welded structure is used to fix the first glass substrate and the second glass substrate.

[0013] In one specific embodiment, after the step of laser welding the first glass substrate and the second glass substrate at positions corresponding to the frame region to form a welded structure surrounding the light-emitting region, the method further includes: The welded structure is irradiated with a laser of preset power to separate the welded structure from the first glass substrate and / or the second glass substrate.

[0014] The beneficial effects of this application's embodiments are as follows: Unlike existing technologies, this application provides a light-emitting panel and its fabrication method, as well as a display device. The light-emitting panel includes a glass-based lamp plate and a second glass substrate. The glass-based lamp plate includes a light-emitting area and a border area surrounding the light-emitting area. The glass-based lamp plate includes a first glass substrate and a plurality of light-emitting units disposed on the corresponding light-emitting area of ​​the first glass substrate. The second glass substrate is disposed on the light-emitting side of the glass-based lamp plate and covers the light-emitting area and at least part of the border area. The first glass substrate and the second glass substrate are fixed by a welding structure located in the border area. The welding structure surrounds and seals the light-emitting area. The welding structure can be separated from the first glass substrate and / or the second glass substrate under laser irradiation of a preset power. By covering the light-emitting side of the glass-based lamp panel with a second glass substrate and laser welding the first and second glass substrates in the frame area to form a welded structure, the crack resistance and pressure resistance of the glass substrate are improved, effectively solving the defects of large-size glass substrates being fragile and having low yield, thus enabling the production of large-size glass-based lamp panels. It can also reduce interface light loss and improve light emission efficiency. At the same time, the welded structure surrounds and seals the light-emitting area, blocking the path of moisture intrusion and preventing short circuits or dead lamps caused by metal ion migration. In addition, by enabling the welded structure to soften and separate from the first and second glass substrates under preset power laser irradiation, the second glass substrate can be directly removed from the entire panel during rework, effectively improving rework efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the light-emitting panel provided in the first embodiment of this application; Figure 2 for Figure 1 A cross-sectional view of the light-emitting panel along line AA; Figure 3 This is a cross-sectional view of the light-emitting panel along line AA provided in the second embodiment of this application; Figure 4 This is a structural cross-sectional view of the display device provided in the third embodiment of this application; Figure 5 This is a schematic diagram of the structure of the light-emitting panel in the display device provided in the fourth embodiment of this application; Figure 6 This is a schematic flowchart illustrating a method for preparing a light-emitting panel according to an embodiment of this application.

[0016] Explanation of icon numbers: 100-Light-emitting panel; 200-Display panel; 1-Glass-based lamp plate; 2-Second glass substrate; 3-Welding structure; 10-Light-emitting area; 20-Frame area; 11-First glass substrate; 12-Light-emitting unit; 21-Groove; 22-Glass-based diffuser plate; 23-Glass-based light guide plate. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] To improve display quality, existing LCD panels widely adopt Micro LED or Mini LED glass-based display solutions. However, the fragility and low pressure resistance of glass substrates lead to low yield rates for large-size displays. While encapsulating resins (such as epoxy-modified nitrile rubber) provide moisture protection and improve impact resistance, rework requires three steps: localized glue removal, laser repair, and glue reapplying. This leaves repair marks on the lamp board surface, affecting display performance. Furthermore, moisture intrusion can cause metal ion migration (such as silver and copper) to form dendrites, resulting in short circuits or dead LEDs.

[0021] Based on this, this application provides a light-emitting panel and its preparation method. The light-emitting panel can improve the crack resistance and pressure resistance of the glass substrate, effectively solving the defects of large-size glass substrates being fragile and having a low yield; it can also improve the light emission efficiency; it can also block the water vapor intrusion path and effectively improve the rework efficiency.

[0022] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] See Figures 1-2 , Figure 1 This is a schematic diagram of the structure of the light-emitting panel provided in the first embodiment of this application; Figure 2 for Figure 1 The image shows a cross-sectional view of the light-emitting panel along line AA. This application provides a light-emitting panel; the light-emitting panel may include a glass-based lamp plate 1 and a second glass substrate 2.

[0024] The glass-based lamp panel 1 may include a light-emitting area 10 and a frame area 20 surrounding the light-emitting area 10. Specifically, the glass-based lamp panel 1 may include a first glass substrate 11 and a plurality of light-emitting units 12 disposed on the first glass substrate 11 corresponding to the light-emitting area 10. Specifically, the first glass substrate 11 is used to support the plurality of light-emitting units 12, and as shown in the figure... Figure 1 As shown, multiple light-emitting units 12 are arranged in an array on one side surface of the first glass substrate 11.

[0025] The second glass substrate 2 is disposed on the light-emitting side of the glass base lamp plate 1 and covers the light-emitting area 10 to protect the light-emitting unit 12 from external mechanical damage. Furthermore, the second glass substrate 2 also covers at least a portion of the frame area 20 to reserve space for the welding structure 3, preventing adverse effects on the wiring of the light-emitting area 10 and the light-emitting unit 12 during welding. Specifically, the width of the frame area 20 can be greater than or equal to 200 micrometers.

[0026] The first glass substrate 11 and the second glass substrate 2 are fixed together by a welding structure 3 located in the frame region 20 to enhance the strength of the glass base lamp panel 1. Figure 1 and Figure 2The welding structure 3 surrounds and seals the light-emitting area 10, thereby forming a sealed space to isolate the multiple light-emitting units 12 located in the light-emitting area 10 from the outside. Specifically, femtosecond laser welding technology can be used to instantly fuse the glass at the welding position in the frame area 20 without damaging the original structure of the light-emitting panel, so as to achieve the welding effect and form the welding structure 3.

[0027] The welded structure 3 can be softened under laser irradiation of a preset power to release the weld between the first glass substrate 11 and the second glass substrate 2, allowing the first glass substrate 11 and the second glass substrate 2 to separate for rework. It is understood that the preset power of the laser used for desoldering is lower than the power used during laser welding; specifically, the preset power can be 25%-35% of the welding power to ensure that the welded structure 3 softens without directly vaporizing. Preferably, the preset power can be 30% of the welding power.

[0028] By covering the light-emitting side of the glass-based lamp panel 1 with a second glass substrate 2 and laser welding the first glass substrate 11 and the second glass substrate 2 in the frame area 20 to form a welded structure 3, the crack resistance and pressure resistance of the glass substrate are improved, effectively solving the defects of large-size glass substrates being fragile and having a low yield, so as to realize the production of large-size glass-based lamp panels 1; it can also reduce interface light loss and improve light emission efficiency; at the same time, the welded structure 3 surrounds and seals the light-emitting area 10, blocking the path of water vapor intrusion and preventing short circuits or dead lamps caused by metal ion migration; in addition, by making the welded structure 3 soften under the irradiation of a preset power laser and separate it from the first glass substrate 11 and the second glass substrate 2, the second glass substrate 2 can be directly removed as a whole during rework, effectively improving rework efficiency.

[0029] In a specific embodiment, the light-emitting unit 12 can be a micro LED or a sub-millimeter light-emitting diode (Mini LED). The size of the light-emitting unit 12 can be greater than or equal to 1 micrometer and less than or equal to 100 micrometers; specifically, the size of the light-emitting unit 12 can be any value among 1 micrometer, 10 micrometers, 50 micrometers, 70 micrometers, and 100 micrometers. Specifically, when the light-emitting unit 12 is a Micro LED, its size can be greater than or equal to 1 micrometer and less than or equal to 50 micrometers; when the light-emitting unit 12 is a Mini LED, its size can be greater than or equal to 50 micrometers and less than or equal to 100 micrometers.

[0030] Specifically, the second glass substrate 2 may be spaced apart from the side surface of the first glass substrate 11 on which multiple light-emitting units 12 are located, so as to avoid direct contact between the second glass substrate 2 and the light-emitting units 12, and to prevent damage to the light-emitting units 12 caused by squeezing them.

[0031] The welding structure 3 is disposed in the gap between the first glass substrate 11 and the second glass substrate 2; and along the direction perpendicular to the glass base lamp plate 1, one end of the welding structure 3 is connected to the first glass substrate 11 and the other end is connected to the second glass substrate 2, so as to fix the first glass substrate 11 and the second glass substrate 2 while separating them, so that there is a gap between the first glass substrate 11 and the second glass substrate 2 sufficient to accommodate the light-emitting unit 12.

[0032] Specifically, a welding filler, such as polyamide, epoxy resin, or unsaturated polyester resin, can be filled between the first glass substrate 11 and the second glass substrate 2. During laser welding, the laser is focused onto the welding filler and irradiated, causing the filler to melt and then solidify to form the welded structure 3. The welded structure 3 may include at least one of polyamide, epoxy resin, and unsaturated polyester resin.

[0033] It is understandable that the welded structure 3 is a continuous structure surrounding the light-emitting area 10 to ensure good sealing and better prevent moisture from entering the light-emitting area 10.

[0034] In a specific embodiment, the distance d between the first glass substrate 11 and the second glass substrate 2 is greater than or equal to 50 micrometers and less than or equal to 300 micrometers, so as to ensure that after the second glass substrate 2 and the first glass substrate 11 are fixed by welding, the side surface of the second glass substrate 2 close to the first glass substrate 11 can be spaced apart from the light-emitting unit 12, so as to avoid the second glass substrate 2 squeezing the light-emitting unit 12 and causing damage.

[0035] It is understood that the size of the light-emitting unit 12 (Micro LED or Mini LED) is usually between 50 and 300 micrometers. Setting the distance d between the first glass substrate 11 and the second glass substrate 2 to be slightly larger than the size of the light-emitting unit 12 can effectively avoid damage to the light-emitting unit 12.

[0036] Specifically, the distance d between the first glass substrate 11 and the second glass substrate 2 can be any value among 50 micrometers, 100 micrometers, 150 micrometers, 250 micrometers or 300 micrometers, as long as the distance d between the first glass substrate 11 and the second glass substrate 2 is slightly larger than the size of the light-emitting unit 12.

[0037] See Figure 3 , Figure 3This is a cross-sectional view of the light-emitting panel provided in the second embodiment of this application along line AA. The structure of the light-emitting panel provided in the second embodiment of this application is basically the same as that of the light-emitting panel provided in the first embodiment of this application. The difference is that in the second embodiment of this application, the second glass substrate 2 has a plurality of grooves 21 on the side surface near the first glass substrate 11. The plurality of grooves 21 correspond one-to-one with the plurality of light-emitting units 12, and each light-emitting unit 12 is embedded in the corresponding groove 21.

[0038] By providing a groove 21 on the surface of the second glass substrate 2 to accommodate the light-emitting unit 12, the distance between the second glass substrate 2 and the first glass substrate 11 can be minimized, thereby helping to reduce the overall thickness of the light-emitting panel.

[0039] It is understandable that, since the distance between the second glass substrate 2 and the first glass substrate 11 is small enough, no welding auxiliary materials need to be added during laser welding. The second glass substrate 2 and the first glass substrate 11 can be directly irradiated with laser to melt and solidify the part of the second glass substrate 2 near the gap and part of the first glass substrate 11 to form a welded structure 3.

[0040] Specifically, during laser welding, the laser can be focused on the gap between the second glass substrate 2 and the first glass substrate 11 so that the melting degree of the second glass substrate 2 and the first glass substrate 11 is similar, and the resulting welded structure 3 can be more uniform.

[0041] Furthermore, the depth h of the groove 21 is greater than or equal to 50 micrometers and less than or equal to 300 micrometers, so as to ensure that after the second glass substrate 2 and the first glass substrate 11 are fixed by welding, the bottom wall of the groove 21 can be spaced apart from the light-emitting unit 12, so as to avoid the second glass substrate 2 squeezing the light-emitting unit 12 and causing damage.

[0042] Specifically, the depth h of the groove 21 can be any value among 50 micrometers, 100 micrometers, 150 micrometers, 250 micrometers or 300 micrometers, as long as the depth h of the groove 21 is slightly larger than the size of the light-emitting unit 12.

[0043] This application provides a light-emitting panel, which includes a glass-based lamp plate 1 and a second glass substrate 2. The glass-based lamp plate 1 includes a light-emitting region 10 and a frame region 20 surrounding the light-emitting region 10. The glass-based lamp plate 1 includes a first glass substrate 11 and a plurality of light-emitting units 12 disposed on the first glass substrate 11 corresponding to the light-emitting region 10. The second glass substrate 2 is disposed on the light-emitting side of the glass-based lamp plate 1 and covers the light-emitting region 10 and at least part of the frame region 20. The first glass substrate 11 and the second glass substrate 2 are fixed by a welding structure 3 located in the frame region 20. The welding structure 3 surrounds and seals the light-emitting region 10. The welding structure 3 can be separated from the first glass substrate 11 and / or the second glass substrate 2 under laser irradiation of a preset power. By covering the light-emitting side of the glass-based lamp panel 1 with a second glass substrate 2 and laser welding the first glass substrate 11 and the second glass substrate 2 in the frame area 20 to form a welded structure 3, the crack resistance and pressure resistance of the glass substrate are improved, effectively solving the defects of large-size glass substrates being fragile and having a low yield, so as to realize the production of large-size glass-based lamp panels 1; it can also reduce interface light loss and improve light emission efficiency; at the same time, the welded structure 3 surrounds and seals the light-emitting area 10, blocking the path of water vapor intrusion and preventing short circuits or dead lamps caused by metal ion migration; in addition, by making the welded structure 3 soften under the irradiation of a preset power laser and separate it from the first glass substrate 11 and the second glass substrate 2, the second glass substrate 2 can be directly removed as a whole during rework, effectively improving rework efficiency.

[0044] See Figure 4 , Figure 4 This is a structural cross-sectional view of a display device provided in the third embodiment of this application. The third embodiment of this application provides a display device for displaying images. The display device may include a light-emitting panel 100 and a display panel 200. The structure of the light-emitting panel in the display device provided in the third embodiment of this application is basically the same as that of the light-emitting panel provided in the first embodiment of this application. The difference is that in the third embodiment of this application, the second glass substrate 2 can serve as a glass-based diffuser plate 22 to simplify the structure of the light-emitting panel and further reduce the overall thickness of the light-emitting panel.

[0045] Specifically, in the third embodiment, the light-emitting panel can be a direct-lit backlight module. Specifically, the light-emitting unit 12 can be a Mini LED; its size can be greater than or equal to 50 micrometers and less than or equal to 100 micrometers; specifically, the size of the light-emitting unit 12 can be any value among 50 micrometers, 60 micrometers, 70 micrometers, 80 micrometers, and 100 micrometers.

[0046] The display panel 200 is disposed on the light-emitting side of the light-emitting panel 100 and is used to selectively transmit the light emitted by the light-emitting panel 100 to form a display image.

[0047] The glass-based diffuser 22 replaces the traditional plastic diffuser by creating special microstructures or patterns on a glass substrate, achieving superior optical effects and physical properties. Compared to traditional plastic diffusers, the glass-based diffuser 22 offers advantages such as high heat resistance, low thermal expansion, and excellent flatness. Furthermore, the glass-based diffuser 22 allows for the construction of thinner optical stacks, facilitating the design of thinner and lighter light-emitting panels. Specifically, the glass-based diffuser 22 may include microstructures (not shown), an anti-reflective coating (not shown), and scattering particles (not shown).

[0048] In specific embodiments, recessed structures can be created on the glass surface using photolithography and etching processes, thereby forming a microlens array (such as a diverging light-transmitting aperture) on the glass surface. Alternatively, raised structures can be created on the glass surface using a spraying process, thereby forming a microprism array (such as pyramid-shaped or V-shaped protrusions) on the glass surface. These microstructures expand the light propagation angle through refraction and reflection, transforming a point light source into a uniform surface light source. Specifically, the diameter of the microstructure can be 10 micrometers to 100 micrometers.

[0049] Silica (SiO2) particles are sprayed onto the glass surface to form a micro-roughened surface, thereby creating an anti-glare layer to control haze at 85%–95% and eliminate specular reflection. The silica particles have a particle size of 1-5 micrometers.

[0050] An antireflective coating is a multilayer film structure formed by sequentially depositing magnesium fluoride (MgF2) and silicon dioxide on the glass surface to increase light transmittance to over 98%. Specifically, the thickness of the antireflective coating is λ / 4.

[0051] The scattering particles are embedded within the glass, which can be achieved by incorporating zirconium dioxide (ZrO2) nanoparticles and / or barium titanate (BaTiO3) nanoparticles while the glass is in a molten state. Specifically, the concentration of the scattering particles can be 0.5%-2%, and the particle size can be 200 nm-500 nm, to achieve uniform scattering within the glass and avoid the diffusion function being affected by surface structure wear.

[0052] See Figure 5 , Figure 5 This is a schematic diagram of the structure of the light-emitting panel in the display device provided in the fourth embodiment of this application. The structure of the display device provided in the fourth embodiment of this application is basically the same as that of the display device provided in the third embodiment of this application. The difference is that in the fourth embodiment of this application, the backlight module is a side-lit backlight module, and the second glass substrate 2 can be a glass-based light guide plate 23 to simplify the structure of the light-emitting panel and further reduce the overall thickness of the light-emitting panel. Among them, the glass-based lamp plate 1 is a strip lamp plate; the sidewall of the second glass substrate 2 is fixed to the first glass substrate 11 by a welding structure 3.

[0053] The glass-based light guide plate 23 is a key optical component that uses optical glass as a substrate to convert point or line light sources into uniform surface light sources. Compared with the traditionally widely used acrylic (PMMA) light guide plate, the advantages of the glass-based light guide plate 23 are mainly reflected in its material properties; it has excellent dimensional stability and thermal stability, higher surface hardness and durability, and superior optical uniformity.

[0054] The glass-based light guide plate 23 may include micro-dots (not shown), coupling structures (not shown), and microstructures (not shown). The micro-dots are arranged in a gradient from the center to the edge on the bottom surface of the glass-based light guide plate 23; the dot density in the center region is 0.3 mm to 0.5 mm, and the dot spacing in the edge region is denser, with a dot spacing of 0.1 mm to 0.2 mm. This gradual dot density compensates for edge light attenuation. Furthermore, the dot diameter and depth change synchronously to achieve brightness uniformity of over 92%; the dot diameter is 50 μm to 200 μm, and the dot depth is 10 μm to 50 μm.

[0055] The coupling structure is located on the light-incident side of the glass-based light guide plate 23, and is used to guide edge light rays to the center to reduce light loss and eliminate bright edges. The coupling structure can be a prism coupling groove (such as a V-groove), with an angle of 70°-90° and a depth of 0.2 mm-0.5 mm.

[0056] The sidewalls of the glass-based light guide plate 23 are highly reflective to recover lateral light leakage. Specifically, this can be achieved by sputtering a silver reflective layer or laminating a reflective film onto the sidewalls.

[0057] Microstructures are disposed on the light-emitting side of the glass-based light guide plate 23 to control the vertical emission of the light beam and reduce dependence on the diffusion film. The microstructures can be a microprism array with an apex angle of 90°-120°. The light-emitting side of the glass-based light guide plate 23 also has an anti-glare layer to eliminate specular reflection.

[0058] The glass-based light guide plate 23 can be made of high-refractive-index glass to reduce total internal reflection loss and improve light extraction efficiency. The glass-based light guide plate 23 can also be made of ultra-low expansion glass to prevent high-temperature deformation. Furthermore, an anti-reflection coating can be applied to the upper and lower surfaces of the glass-based light guide plate 23.

[0059] See Figure 6 , Figure 6 This is a schematic flowchart illustrating a method for fabricating a light-emitting panel according to an embodiment of this application. This application also provides a method for fabricating a light-emitting panel, used to prepare the light-emitting panel involved in any of the above embodiments. Figure 6 As shown, the preparation method may specifically include: Step S1: Provide a glass-based lamp panel.

[0060] Specifically, the glass-based lamp panel 1 may include a light-emitting area 10 and a frame area 20 surrounding the light-emitting area 10; the glass-based lamp panel 1 includes a first glass substrate 11 and a plurality of light-emitting units 12 disposed on the first glass substrate 11 corresponding to the light-emitting area 10.

[0061] The light-emitting unit 12 can be a Micro LED or a Mini LED. The Micro LED or Mini LED can be fixed to one side surface of the first glass substrate 11 corresponding to the light-emitting area 10 by welding.

[0062] Step S2: Cover the light-emitting side of the glass-based lamp panel with a second glass substrate and make the second glass substrate cover the light-emitting area and at least part of the frame area.

[0063] In the specific implementation process, before covering the second glass substrate 2, a ring of welding auxiliary material surrounding the light-emitting area 10 can be placed at the position of the first glass substrate 11 corresponding to the frame area 20.

[0064] Of course, in other embodiments, the second glass substrate 2 has a plurality of grooves on the side surface near the first glass substrate 11 to accommodate the light-emitting unit 12, and the welding auxiliary material can be omitted to directly cover the second glass substrate 2.

[0065] Step S3: Laser welding is performed on the corresponding frame areas of the first glass substrate and the second glass substrate to form a welded structure that surrounds and seals the light-emitting area.

[0066] The welding structure 3 is used to fix the first glass substrate 11 and the second glass substrate 2. In specific implementation, the first glass substrate 11 and the second glass substrate 2 can be welded by laser irradiation; specifically, infrared laser welding can be used. During welding, the laser can be focused on the welding auxiliary material, causing the welding auxiliary material to melt and then solidify to form the welding structure 3.

[0067] In other embodiments, the laser can also be focused on the gap between the second glass substrate 2 and the first glass substrate 11 to melt and solidify a portion of the second glass substrate 2 near the gap and a portion of the first glass substrate 11 to form a welded structure 3.

[0068] After step S3, the method further includes: irradiating the welded structure with a laser of preset power to separate the welded structure from the first glass substrate and / or the second glass substrate.

[0069] In the specific implementation process, before laser desoldering, a lower power laser can be used to preheat the welded structure 3 to uniform the thermal field and reduce stress concentration; specifically, the preheating scanning speed can be 100mm / s.

[0070] Then, a technician using a preset power setting performs a desoldering scan on welded structure 3 to soften it, reducing its viscosity to 10. 4 Pa.s., to separate the welded structure 3 from the first glass substrate 11 and / or the second glass substrate 2, thereby facilitating the rework of the glass-based lamp panel 1. During preheating and desoldering, argon gas can be blown in the air for cooling assistance to suppress the expansion of the heat-affected zone.

[0071] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A light-emitting panel, characterized in that, include: A glass-based lamp panel; the glass-based lamp panel includes a light-emitting area and a border area surrounding the light-emitting area; the glass-based lamp panel includes a first glass substrate and a plurality of light-emitting units disposed on the first glass substrate corresponding to the light-emitting area; A second glass substrate is disposed on the light-emitting side of the glass-based lamp plate and covers the light-emitting area and at least part of the frame area; The first glass substrate and the second glass substrate are fixed by a welding structure located in the frame region; and the welding structure surrounds and seals the light-emitting area. The welding structure can be softened and separated from the first glass substrate and the second glass substrate under laser irradiation of a preset power.

2. The light-emitting panel according to claim 1, characterized in that, The light-emitting unit is a micro light-emitting diode or a sub-millimeter light-emitting diode; wherein the size of the light-emitting unit is greater than or equal to 1 micrometer and less than or equal to 100 micrometers; The second glass substrate is disposed at intervals with the plurality of light-emitting units on the side surface of the second glass substrate near the first glass substrate; The welding structure is disposed between the first glass substrate and the second glass substrate; and one end of the welding structure is connected to the first glass substrate and the other end is connected to the second glass substrate.

3. The light-emitting panel according to claim 2, characterized in that, The distance between the first glass substrate and the second glass substrate is greater than or equal to 50 micrometers and less than or equal to 300 micrometers.

4. The light-emitting panel according to claim 1, characterized in that, The light-emitting unit is a micro light-emitting diode or a sub-millimeter light-emitting diode; the size of the light-emitting unit is greater than or equal to 1 micrometer and less than or equal to 100 micrometers; the second glass substrate has a plurality of grooves on the side surface near the first glass substrate; the plurality of grooves correspond one-to-one with the plurality of light-emitting units, and each light-emitting unit is embedded in the corresponding groove.

5. The light-emitting panel according to claim 4, characterized in that, The depth of the groove is greater than or equal to 50 micrometers and less than or equal to 300 micrometers.

6. The light-emitting panel according to any one of claims 1-5, characterized in that, The welded structure includes at least one of polyamide, epoxy resin, and unsaturated polyester resin.

7. A display device, characterized in that, include: A light-emitting panel, wherein the light-emitting panel is the light-emitting panel according to any one of claims 1-6; The light-emitting unit of the light-emitting panel is a sub-millimeter light-emitting diode; The size of the sub-millimeter light-emitting diode is greater than or equal to 50 micrometers and less than or equal to 100 micrometers; The display panel is located on the light-emitting side of the light-emitting panel.

8. The display device according to claim 7, characterized in that, The light-emitting panel is a direct-lit backlight module; wherein, the second glass substrate of the light-emitting panel is a glass-based diffuser plate; or The light-emitting panel is a side-lit backlight module; wherein, the second glass substrate of the light-emitting panel is a glass-based light guide plate.

9. A method for preparing a light-emitting panel, characterized in that, include: A glass-based lamp panel is provided; the glass-based lamp panel includes a light-emitting area and a border area surrounding the light-emitting area; the glass-based lamp panel includes a first glass substrate and a plurality of light-emitting units disposed on the first glass substrate corresponding to the light-emitting area; A second glass substrate is covered on the light-emitting side of the glass-based lamp panel, and the second glass substrate covers the light-emitting area and at least part of the frame area; Laser welding is performed on the first glass substrate and the second glass substrate at positions corresponding to the frame area to form a welded structure that surrounds and seals the light-emitting area; the welded structure is used to fix the first glass substrate and the second glass substrate.

10. The method for preparing a light-emitting panel according to claim 9, characterized in that, After the step of laser welding the first glass substrate and the second glass substrate at positions corresponding to the frame region to form a welded structure surrounding the light-emitting area, the method further includes: The welded structure is irradiated with a laser of preset power to separate the welded structure from the first glass substrate and / or the second glass substrate.

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