Mini-led lens manufacturing method and mini-led lens

Abstract

The application discloses a Mini-LED lens manufacturing method, which comprises the following steps: (1) dropping white glue on the positions of both ends of the Mini-LED on a substrate, so as to form two first glue drops which are spaced apart from the Mini-LED on both sides of the Mini-LED; (2) dropping organic silicone glue on the surface of the first glue drop and the surface of part of the Mini-LED, so as to form a second glue drop, and the second glue drop covers the first glue drop and part of the Mini-LED; (3) placing the substrate with the first glue drop and the second glue drop for 30-60 minutes, so that the two second glue drops at both ends of the Mini-LED gradually combine at the edges under the action of stress and gravity, and the first glue drop and the second glue drop are solidified after the shape of the first glue drop and the second glue drop is close to stable, so that a complete lens is obtained. The lens manufacturing method can meet the requirements of large spacing of the Mini-LED and thinning of the backlight system, and the obtained lens can reflect and refract the light emitted by the Mini-LED, so that the light is diffused to both ends of the Mini-LED, the light emitting angle is increased, and the purpose of the uniform area light source is achieved. The application further discloses a Mini-LED lens.

Description

Technical Field

[0001] This invention relates to the field of backlight systems, and more particularly to a method for manufacturing a Mini-LED lens and the Mini-LED lens obtained by the method. Background Technology

[0002] Liquid crystal displays (LCDs) require a backlight system to provide a uniform surface light source. Common solutions in current backlight systems include... Figure 1 As shown, an LED light source 10' and a lens are placed at the bottom, and a diffuser plate 20' is placed at a height h from the lens. The diffuser plate 20' transforms the light from multiple LED light sources into a uniform surface light source.

[0003] With the development of LCD technology, in pursuit of thinner designs and dynamic backlighting, LCD systems with Mini-LEDs have emerged in recent years, such as... Figure 2 As shown. At the bottom of the LCD system 1' is a Mini-LED light board 10', on which are tiny blue LEDs, typically between 100-500 micrometers in size. A single Mini-LED light board 10' contains tens of thousands of blue LEDs. A diffuser 20' is placed at a certain distance above the Mini-LED light board 10'; this distance is the optical distance (OD). The diffuser 20' is used to convert the dot matrix blue light emitted by the tens of thousands of Mini-LEDs into a uniform surface light source. Above the diffuser 20', in sequence, are a QD film (Quantum Dot Film) 30', an optical film 40', and the LCD module 50'.

[0004] In existing LCD systems, the number of Mini-LEDs directly impacts cost. To reduce costs, the number of Mini-LEDs must be reduced, meaning the spacing between them must be increased. Simultaneously, the backlight system needs to be thinner, necessitating the use of lenses. Lenses are typically made of high-molecular-weight materials like PMMA or PC, formed through injection molding, and then fixed above the Mini-LEDs using a mounting process. However, these lenses are relatively thick and unsuitable for thinner designs. Another common method is to directly apply a drop of encapsulating adhesive to the surface of the Mini-LED to form a near-spherical silicone lens. However, this type of silicone lens does not significantly increase the light emission angle of the Mini-LED, failing to meet the dual requirements of large Mini-LED spacing and a thinner backlight system.

[0005] Therefore, it is necessary to provide a method for manufacturing a Mini-LED lens and the resulting Mini-LED lens to meet the dual requirements of large pitch and thin backlight system of Mini-LED. Summary of the Invention

[0006] The purpose of this invention is to provide a method for manufacturing Mini-LED lenses to meet the dual requirements of large pitch in Mini-LEDs and thin backlight systems.

[0007] Another objective of this invention is to provide a Mini-LED lens that meets the dual requirements of large pitch in Mini-LEDs and thin backlight systems.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: A method for manufacturing a Mini-LED lens is provided, applicable to forming a lens on a substrate provided with Mini-LEDs, comprising the following steps:

[0009] (1) Drip white glue onto both ends of the Mini-LED to form two first glue drops on both sides of the Mini-LED, with the first glue drops spaced apart from the Mini-LED;

[0010] (2) A second droplet is formed by dripping silicone onto the surface of the first droplet and a portion of the Mini-LED, and the second droplet covers the first droplet and a portion of the Mini-LED;

[0011] (3) The substrate with the first adhesive droplet and the second adhesive droplet formed is left to stand for 30-60 minutes. Under the action of stress and gravity, the two second adhesive droplets at both ends of the Mini-LED gradually bond together at their edges. After the shapes of the first adhesive droplet and the second adhesive droplet are nearly stable, they are cured to obtain a complete lens.

[0012] Preferably, in the Mini-LED lens manufacturing method of the present invention, the diameter of the first adhesive droplet is 0.8mm-1.3mm, the height is 0.2mm-0.3mm, and the distance from the center of the first adhesive droplet to the center of the Mini-LED is 0.5mm-1.0mm.

[0013] Preferably, in the Mini-LED lens manufacturing method of the present invention, the portion of the Mini-LED covered by the second adhesive droplet is between 1 / 3 and 1 / 2 of the length of the Mini-LED.

[0014] Preferably, in the Mini-LED lens manufacturing method of the present invention, the Mini-LED is soldered to the substrate via two pads, and the second adhesive droplet at least covers the pads.

[0015] Preferably, in the Mini-LED lens manufacturing method of the present invention, the diameter of the second adhesive droplet is 1.0mm-1.6mm, the height is 0.3mm-0.65mm, and the center-to-center distance between the two second adhesive droplets is 0.8mm-1.6mm.

[0016] Preferably, in the Mini-LED lens manufacturing method of the present invention, the viscosity of the white adhesive is less than that of the silicone rubber, and the refractive index of the silicone rubber is greater than 1.49.

[0017] Preferably, in the Mini-LED lens manufacturing method of the present invention, the Mini-LED has a length of 0.28 mm and a width of 0.127 mm, and the first adhesive droplet is formed at both ends of the Mini-LED along its length.

[0018] Correspondingly, the present invention also provides a Mini-LED lens manufactured using the Mini-LED lens manufacturing method described above. The Mini-LED lens corresponds to the Mini-LED forming on a substrate. The Mini-LED lens includes a first colloid and a second colloid. Two first colloids are formed at both ends of a Mini-LED, and each first colloid is spaced apart from the Mini-LED. Each second colloid wraps around the outside of a first colloid and part of the surface of the Mini-LED. The adjacent edges of the two second colloids at both ends of the Mini-LED are joined together, and a downwardly recessed portion is formed above the joint position of the two second colloids.

[0019] Preferably, each of the second colloids encapsulates at least one pad of the Mini-LED.

[0020] Preferably, the first colloid is white and the second colloid is transparent.

[0021] Compared with the prior art, the Mini-LED lens manufacturing method of the present invention first drips white glue on both ends of the Mini-LED to form two first glue drops, and the first glue drops are spaced apart from the Mini-LED. Then, organic silicone is dripped on the surface of the first glue drops and part of the surface of the Mini-LED to form second glue drops, and the second glue drops cover the first glue drops and part of the Mini-LED. After standing, the two second glue drops at both ends of the Mini-LED gradually join together under the action of stress and gravity, and then solidify to obtain a lens. First, by directly forming a lens by applying adhesive droplets above the Mini-LED, the number of Mini-LEDs can be reduced, meeting the requirement for large spacing between Mini-LEDs and lowering costs. This also satisfies the requirement for a thinner backlight system. Second, the lens formed by this method includes a white first adhesive and a transparent second adhesive. The second adhesive covers the first adhesive and part of the Mini-LED chip, thus reflecting and refracting the light emitted by the Mini-LED into the first adhesive. This causes the light to diffuse towards the two pads of the Mini-LED, increasing the emission angle and reducing the brightness directly above the Mini-LED, thereby achieving a uniform surface light source. The first adhesive formed by the white adhesive in the lens reflects and refracts the light emitted by the Mini-LED towards the two pads, further enhancing the uniformity of the surface light.

[0022] Correspondingly, the Mini-LED lens obtained by the Mini-LED lens manufacturing method of the present invention has a first colloid and a second colloid. The two first colloids are formed at both ends of a Mini-LED and are spaced apart from it. Each second colloid wraps around the outside of a first colloid and part of the surface of the Mini-LED. The adjacent edges of the two second colloids at both ends of the Mini-LED are joined together, and a recessed portion is formed above the joint position of the two second colloids 132. First, a lens is directly formed on top of the Mini-LED chip using drop-adhesive. This reduces the number of Mini-LED chips, meeting the requirement for large spacing between chips and lowering costs, while also satisfying the thinning requirements of the backlight system. Second, the lens comprises a white first colloid and a transparent second colloid. The second colloid covers the first colloid and part of the Mini-LED chip. Therefore, the second colloid can reflect and refract the light emitted by the Mini-LED chip that enters its interior, causing the light to diffuse towards the two pads of the Mini-LED chip, thus increasing the emission angle and reducing the brightness directly above the Mini-LED chip, thereby achieving a uniform surface light source. The white colloid in the lens forms the first colloid, which reflects the light emitted by the Mini-LED chip towards the two pads, further enhancing the uniformity of the surface light source. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a backlight system in the prior art.

[0024] Figure 2 This is a schematic diagram of the structure of a backlight system with Mini-LED in the prior art.

[0025] Figure 3 This is a side view of the substrate equipped with Mini-LEDs in this invention.

[0026] Figure 4 yes Figure 3 A side view of the first adhesive droplet is obtained by placing it on the substrate.

[0027] Figure 5 yes Figure 4 Top view.

[0028] Figure 6 yes Figure 4 A side view of the second adhesive droplet obtained by placing it on the substrate.

[0029] Figure 7 yes Figure 6 A schematic diagram showing the state of the two second droplets combined.

[0030] Figure 8 yes Figure 6 A side view of the lens formed after the first and second adhesive droplets have cured.

[0031] Figure 9 yes Figure 8 A schematic diagram illustrating the refraction principle of a medium lens.

[0032] Figure 10 This is a schematic diagram illustrating the optical simulation effect of the lens in this invention. Detailed Implementation

[0033] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which similar element reference numerals represent similar elements. It should be noted that the directional descriptions involved in the present invention, such as up, down, left, right, front, and rear, indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the technical solutions of this application or / and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first," "second," etc., described are only used to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0034] Combination Figures 3-8As shown, the Mini-LED lens manufacturing method provided by the present invention is applicable to forming a lens 130 on a substrate 110 with a Mini-LED chip 120, but is not limited to forming a lens 130 above the Mini-LED chip 120. Any other type of LED can use the method of the present invention to form a lens 130.

[0035] First refer to Figure 3 As shown, a plurality of Mini-LED chips 120 are pre-assembled on the substrate 110 of the present invention. Each Mini-LED chip 120 is soldered to the substrate 110 via pads 121 at both ends, but the arrangement is not limited to this method. In one embodiment of the present invention, the Mini-LED chip 120 has a length of 0.28 mm and a width of 0.127 mm. In other embodiments, Mini-LED chips 120 of other sizes can be selected. The dimensions of the substrate 110, the Mini-LED chips 120, and the manner in which they are disposed on the substrate 110 are all conventional in the art and will not be described in detail.

[0036] Continue to combine Figures 3-8 The method for manufacturing a Mini-LED lens according to the present invention will be described in detail below. The method includes the following steps:

[0037] S01. White glue is dripped at both ends of each Mini-LED chip 120, thereby forming two first glue drops 131' on both sides of the Mini-LED chip 120, and the two first glue drops 131' are spaced apart from the Mini-LED chip 120.

[0038] Combination Figure 4-5 As shown, in this invention, white glue is applied to both ends of the Mini-LED chip 120 along its length to form the first glue droplet 131'. The diameter and height of the white glue can be flexibly set according to the size of the Mini-LED chip 120 and the shape and size of the second glue droplet required in subsequent steps. Simultaneously, the distance from the center of the first glue droplet 131' to the center of the Mini-LED chip 120 can also be flexibly adjusted. In this invention, by adjusting the height, diameter, and distance from the center of the first glue droplet 131' to the center of the Mini-LED chip 120, its size can be adjusted. This not only adjusts its reflective and refractive area but also further adjusts the shape of the second glue droplet subsequently formed on its outer surface, as detailed later.

[0039] S02, Deposit silicone onto the surface of the first droplet 131' and a portion of the Mini-LED chip 120 to form a second droplet 132', each second droplet 132' covering a first droplet 131' and a portion of the Mini-LED chip 120;

[0040] See Figure 6-7 As shown, in this invention, the viscosity of the white adhesive is less than that of the silicone rubber, so it is easier to form a larger volume after the silicone rubber is dripped. By dripping silicone rubber above the two first adhesive droplets 131', two second adhesive droplets 132' are obtained at both ends of the Mini-LED chip 120 along its length. Each second adhesive droplet 132' can completely cover one first adhesive droplet 131', while each second adhesive droplet 132' only covers a portion of the Mini-LED chip 120 (see...). Figure 6 The purpose of this is to ensure that when the two second adhesive droplets 132' gradually bond together under stress and gravity in subsequent steps, their edges do not overlap too much, so as not to affect the shape of the second adhesive droplets 132'.

[0041] S03. The substrate 110 with the first adhesive droplet 131' and the second adhesive droplet 132' formed is left to stand for 30-60 minutes. Under the action of stress and gravity, the two second adhesive droplets 132' at both ends of the Mini-LED chip 120 gradually bond together at their edges. After the shapes of the first adhesive droplet 131' and the second adhesive droplet 132' are nearly stable, they are cured to obtain a complete lens 130.

[0042] See Figures 7-9 As shown, in this invention, after standing, the edges of the two second adhesive droplets 132' gradually flow downwards towards the Mini-LED chip 120 and gradually combine under the action of stress and gravity. A recess 133 is formed above the combination position of the two second adhesive droplets 132'. The overall shape of each second adhesive droplet 132' can be ellipsoidal or similar (see...). Figure 7-8 (The specific details are not limited here.) After curing, the first droplet 131' forms a white first colloid 131, while the second droplet 132' forms a transparent second colloid 132. The first colloid 131 is located at both ends of the Mini-LED chip 120, and the second colloid 132 covers the outside of the first colloid 131 and the top of the Mini-LED chip 120 (see...). Figure 8 The transparent second colloid 132 is used to reflect and refract the light emitted by the Mini-LED chip 120, causing the light to diffuse towards the two pads 121 of the Mini-LED chip 120, increasing the light emission angle of the Mini-LED chip 120, and reducing the brightness directly above the Mini-LED chip 120.

[0043] See again Figure 4-5 As shown, in one embodiment of the Mini-LED lens manufacturing method of the present invention, the diameter of the first adhesive droplet 131' is set to 0.8mm-1.3mm, the height is set to 0.2mm-0.3mm, and the distance from the center of the first adhesive droplet 131' to the center of the Mini-LED chip 120 is set to 0.5mm-1.0mm. That is, the distance D between the centers of the two first adhesive drops 131' is... W1 The preferred setting is 1.0mm-2.0mm. Specifically, the height and diameter of a single first droplet 131' can be adjusted using a dispensing device. The dispensing device is standard equipment in the field and will not be described in detail further.

[0044] In one specific embodiment, the diameter of the first adhesive droplet 131' is set to 1 mm and the height to 0.25 mm using a dispensing device, and the distance from the center of the first adhesive droplet 131' to the center of the Mini-LED chip 120 is set to 0.7 mm. That is, the spacing D between the centers of the two first adhesive droplets 131' is... W1 The preferred thickness is 1.4 mm. After applying a drop of white adhesive, two spherical first adhesive drops 131' are formed at both ends of the Mini-LED chip 120 along its length, with both drops spaced apart from the ends of the Mini-LED chip 120. Figure 4-5 As shown.

[0045] See below. Figure 6-7 As shown, in one embodiment of the Mini-LED lens manufacturing method of the present invention, the portion of the Mini-LED chip 120 covered by the second adhesive droplet 132' is between 1 / 3 and 1 / 2 of the length of the Mini-LED chip 120, such that each second adhesive droplet 132' covers at least one pad 121 of the Mini-LED chip 120, as shown. Figure 6 As shown. Thus, when the edges of the two second adhesive droplets 132' are joined together under stress and gravity, the edges of the two second adhesive droplets 132' will not overlap too much, thereby avoiding a significant impact on the shape of the second adhesive droplets 132', such as... Figure 7 As shown. After the edges of the two second adhesive drops 132' are joined, they can completely fill the area below the Mini-LED chip 120, or only partially fill it; however, whether the edges of the two second adhesive drops 132' are joined above the Mini-LED chip 120 is not specifically limited, that is, they can be joined together to completely enclose the entire Mini-LED chip 120, or they can be left unjoined so that the center of the Mini-LED chip 120 is exposed. Figure 8-9The embodiment shown is one in which the center of the Mini-LED chip 120 is exposed.

[0046] In this embodiment, the diameter of the second adhesive droplet 132' is preferably set to 1.0mm-1.6mm, the height is preferably set to 0.3mm-0.65mm, and the center-to-center distance D between the two second adhesive droplets 132' is... W2 The distance D between the centers of the two first adhesive drops 131' is greater than the distance between them. W1 Of course, the diameter and height of the second adhesive droplet 132' are not limited to those in this embodiment and can be flexibly set as needed, as long as they can completely cover the first adhesive droplet 131' and part of the Mini-LED chip 120.

[0047] Continue reading Figure 6-7 As shown, in one specific embodiment of the present invention, the diameter of a single second adhesive droplet 132' is set to 1.4 mm and the height is set to 0.45 mm using a dispensing device, and the center-to-center distance D between two second adhesive droplets 132' is... W2 The diameter is greater than 1.4 mm. After forming a second droplet 132' by dispensing silicone above the first droplet 131' using a dispensing device, the second droplet 132' completely surrounds the first droplet 131', while partially dispensing above the Mini-LED chip 120. Under stress and gravity, the second droplet 132' spreads outwards, but its top naturally forms an upward-convex arc structure. At the same time, the adjacent edges of the two second droplets 132' gradually merge, and a recess 133 is formed above the merging point of the two second droplets 132'. After curing, the overall shape of the lens is similar to a saddle shape or a peanut shell shape.

[0048] See Figure 9 As shown, in this invention, the refractive index of the silicone is greater than 1.49. Thus, when the second droplet 132' is obtained by dropping and curing, a second colloid 132 is formed. This transparent second colloid 132 has a large refractive index. Therefore, after the light emitted by the Mini-LED chip 120 enters the second colloid 132, the second colloid 132 can reflect and refract the light emitted by the Mini-LED chip 120, causing the light to diffuse towards the two pads 121 of the Mini-LED chip 120, increasing the emission angle of the Mini-LED chip 120, reducing the brightness directly above the Mini-LED chip 120, thereby improving the uniformity of the surface light source. Combined with... Figure 10As shown in the optical simulation diagram, the light emitted by the Mini-LED chip 120 is diffused to the left and right directions, the brightness directly above the Mini-LED chip 120 is reduced, and most of the high-brightness areas are concentrated to the left and right sides of the Mini-LED chip 120. Simultaneously, the white first colloid 131 reflects the light emitted from the Mini-LED chip 120 towards the two pads 121, further enhancing the uniformity of the surface light source. This white first colloid 131 can also reflect and refract light passing through the substrate and incident on its interior, or light incident on its interior from other directions, further improving the uniformity of the surface light source.

[0049] In summary, the Mini-LED lens manufacturing method of the present invention involves first dripping white glue onto both ends of the Mini-LED chip 120 to form two first glue drops 131', with the first glue drops 131' spaced apart from the Mini-LED chip 120. Then, organic silicone is dripped onto the surface of the first glue drops 131' and part of the surface of the Mini-LED chip 120 to form second glue drops 132', which cover the first glue drops 131' and part of the Mini-LED chip 120. After standing, the two second glue drops 132' at both ends of the Mini-LED chip 120 gradually bond together under stress and gravity, and then solidify to obtain the lens 130. First, by directly molding the lens 130 above the Mini-LED chip 120 using adhesive droplets, the number of Mini-LED chips 120 is reduced, meeting the requirement for large spacing between them and reducing costs. This also satisfies the thinning requirements of the backlight system. Second, the lens 130 formed by this method includes a white first adhesive 131 and a transparent second adhesive 132. The second adhesive 132 covers the outside of the first adhesive 131 and part of the Mini-LED chip 120, thus reflecting and refracting the light emitted from the Mini-LED chip 120 that enters its interior. This causes the light to diffuse towards the two pads 121 of the Mini-LED chip 120, increasing the emission angle and reducing the brightness directly above the Mini-LED chip 120, thereby achieving a uniform surface light source. Furthermore, the white first adhesive 131 in the lens 130 reflects and refracts the light emitted from the Mini-LED chip 120 towards the two pads 121, further enhancing the uniformity of the surface light source.

[0050] Combined again Figures 3-8As shown, the present invention also provides a Mini-LED lens 130 manufactured using the Mini-LED lens manufacturing method described above. The Mini-LED lens 130 is formed on the substrate 110 corresponding to each Mini-LED chip 120. Each Mini-LED lens 130 covers at least a portion of the Mini-LED chip 120. The arrangement of the Mini-LED chip 120 will not be described again.

[0051] See below. Figure 8 As shown, in this invention, the Mini-LED lens 130 includes a first colloid 131 and a second colloid 132. Two first colloids 131 are formed at both ends of a Mini-LED chip 120 along its length, and each first colloid 131 is spaced apart from the Mini-LED chip 120. Two second colloids 132 are respectively formed above the two first colloids 131, and each second colloid 132 wraps around the outside of a first colloid 131 and part of the surface of the Mini-LED chip 120. Furthermore, the adjacent edges of the two second colloids 132 at both ends of the Mini-LED chip 120 are joined together, thereby forming a recess 133 above the joint position of the two second colloids 132. That is, a recessed portion 133 is formed in the middle of the entire Mini-LED lens 130, and an upwardly convex arc structure is formed at both ends. The two upwardly convex arc structures cover both ends of the Mini-LED chip 120, so that the light emitted by the Mini-LED chip 120 can enter the second colloid 132.

[0052] In this invention, the first colloid 131 is formed using white glue, thus it is white. The second colloid 132 is formed using silicone rubber, and it is transparent. Both the first colloid 131 and the second colloid 132 have high refractive indices. In this invention, the refractive index of the second colloid 132 is greater than 1.49. After the light emitted from the Mini-LED chip 120 enters the lens 130, the lens 130 reflects and refracts the light to improve the uniformity of the surface light source.

[0053] More specifically, since the two second colloids 132 are located at both ends of the Mini-LED chip 120 along its length, and their adjacent edges are joined together, the middle portion of the lens 130 forms a concave recess 133, which corresponds approximately to the center of the Mini-LED chip 120. The two ends of the lens 130 are convex arc-shaped structures. This makes the overall shape of the lens 130 resemble a saddle shape or a peanut shell shape. When light emitted from the Mini-LED chip 120 enters the second colloids 132, the second colloids 132 can reflect and refract the light emitted from the Mini-LED chip 120, such as... Figure 9 As shown, this diffuses light towards the two pads 121 of the Mini-LED chip 120, increasing the emission angle of the Mini-LED chip 120 and reducing the brightness directly above the Mini-LED chip 120, thereby improving the uniformity of the surface light source. Combined with... Figure 10 As shown in the optical simulation diagram, the light emitted by the Mini-LED chip 120 is diffused to the left and right directions, the brightness above the Mini-LED chip 120 is reduced, and most of the bright areas are concentrated to the left and right directions of the Mini-LED chip 120.

[0054] In this invention, two second colloids 132 respectively encapsulate at least two pads 121 of the Mini-LED chip 120. Since the adjacent edges of the two second colloids 132 are joined, they are bonded together below the Mini-LED chip 120. However, whether the two second colloids 132 are bonded above the Mini-LED chip 120 is not specifically limited; that is, they can be bonded together to completely encapsulate the entire Mini-LED chip 120 inside the lens 130, or they can be unbonded so that the middle part of the Mini-LED chip 120 is exposed outside the lens 130. Figure 8-9 The embodiment shown is one in which the center of the Mini-LED chip 120 is exposed.

[0055] Continue reading Figure 9 As shown, in the Mini-LED lens 130 of the present invention, the white first colloid 131 can reflect and refract the light emitted from the Mini-LED chip 120 toward the two pads 121, further enhancing the uniformity of the surface light source. The white first colloid 131 can also reflect and refract light that passes through the substrate and enters its interior or light that enters its interior from other directions, further improving the uniformity of the surface light source.

[0056] In summary, the Mini-LED lens 130 obtained by the Mini-LED lens manufacturing method of the present invention has a first colloid 131 and a second colloid 132. The two first colloids 131 are formed at both ends of a Mini-LED chip 120 and are spaced apart from it. Each second colloid 132 wraps around the outside of a first colloid 131 and part of the surface of the Mini-LED chip 120. Furthermore, the adjacent edges of the two second colloids 132 at both ends of the Mini-LED chip 120 are joined together, so that a concave recess 133 is formed in the middle of the lens 130. First, a lens 130 is directly formed above the Mini-LED chip 120 using drop-dip adhesive. This reduces the number of Mini-LED chips 120, meeting the requirement for a large pitch between them and reducing costs. It also meets the requirement for a thinner backlight system. Second, the lens 130 includes a white first colloid 131 and a transparent second colloid 132. The second colloid 132 covers the outside of the first colloid 131 and part of the Mini-LED chip 120. Therefore, the second colloid 132 can reflect and refract the light emitted by the Mini-LED chip 120 that enters its interior, causing the light to diffuse towards the two pads 121 of the Mini-LED chip 120, thereby increasing the emission angle and reducing the brightness directly above the Mini-LED chip 120, thus achieving a uniform surface light source. The first colloid 131 formed by the white colloid in the lens 130 can reflect the light emitted by the Mini-LED chip 120 towards the two pads 121, further enhancing the uniformity of the surface light source.

[0057] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for manufacturing a Mini-LED lens, applicable to forming a lens on a substrate containing Mini-LEDs, characterized in that, Includes the following steps: (1) Drip white glue onto both ends of the Mini-LED to form two first glue drops on both sides of the Mini-LED, with the first glue drops spaced apart from the Mini-LED; (2) A second droplet is formed by dripping silicone onto the surface of the first droplet and a portion of the Mini-LED, and the second droplet covers the first droplet and a portion of the Mini-LED; (3) The substrate with the first adhesive droplet and the second adhesive droplet formed is left to stand for 30-60 minutes. Under the action of stress and gravity, the two second adhesive droplets at both ends of the Mini-LED gradually bond together at their edges. A recess is formed above the bonding position of the two second adhesive droplets. After the shapes of the first adhesive droplet and the second adhesive droplet are nearly stable, they are cured to obtain a complete lens.

2. The method for manufacturing a Mini-LED lens as described in claim 1, characterized in that, The diameter of the first adhesive droplet is 0.8mm-1.3mm, the height is 0.2mm-0.3mm, and the distance from the center of the first adhesive droplet to the center of the Mini-LED is 0.5mm-1.0mm.

3. The method for manufacturing a Mini-LED lens as described in claim 1, characterized in that, The portion of the Mini-LED covered by the second adhesive droplet is between 1 / 3 and 1 / 2 of the length of the Mini-LED.

4. The method for manufacturing a Mini-LED lens as described in any one of claims 1-3, characterized in that, The Mini-LED is soldered to the substrate via two pads, and the second adhesive droplet at least covers the pads.

5. The method for manufacturing a Mini-LED lens as described in any one of claims 1-3, characterized in that, The diameter of the second adhesive droplet is 1.0mm-1.6mm, the height is 0.3mm-0.65mm, and the center-to-center distance between the two second adhesive droplets is 0.8mm-1.6mm.

6. The method for manufacturing a Mini-LED lens as described in any one of claims 1-3, characterized in that, The viscosity of the white adhesive is less than that of the silicone rubber, and the refractive index of the silicone rubber is greater than 1.

49.

7. The method for manufacturing a Mini-LED lens as described in any one of claims 1-3, characterized in that, The Mini-LED has a length of 0.28 mm and a width of 0.127 mm, and the first droplet is formed at both ends of the Mini-LED along its length.

8. A Mini-LED lens manufactured using the Mini-LED lens manufacturing method according to any one of claims 1-7, corresponding to the Mini-LED forming on a substrate, characterized in that, include: A first colloid, two first colloids are formed at both ends of a Mini-LED, and each first colloid is spaced apart from the Mini-LED; The second colloid, each of the second colloids, wraps around the outside of a first colloid and a portion of the surface of the Mini-LED, and the adjacent edges of the two second colloids at both ends of the Mini-LED are joined together, with a downwardly recessed portion formed above the joint of the two second colloids.

9. The Mini-LED lens as described in claim 8, characterized in that, Each of the second colloids encapsulates at least one pad of the Mini-LED.

10. The Mini-LED lens as described in claim 8 or 9, characterized in that, The first colloid is white, and the second colloid is transparent.

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