LED device and preparation method thereof

Abstract

The invention provides an LED device and a preparation method thereof, and belongs to the field of semiconductor devices.The LED device comprises a substrate and a plurality of light-emitting devices arranged on the substrate, a light filtering film is arranged on the top of each light-emitting device, and the light-emitting devices and the light filtering films are wrapped in the center of an apple-heart-shaped rubber block; the light-emitting device is of a five-face light-emitting structure, the thixotropic coefficient of the apple-heart-shaped rubber block is 4.5-5.5, the catalyst concentration is 0.08%-0.14% when the apple-heart-shaped rubber block is prepared, the preparation temperature is 220 DEG C-250 DEG C, the refractive index of the apple-heart-shaped rubber block is 1.46-1.50, the heating time of the apple-heart-shaped rubber block is 5 min-20 min, and the component of the apple-heart-shaped rubber block comprises silica gel. When the silica gel is in a silica gel synthesis stage, the proportion of phenyl monomers is 23%-27%, so that a silica gel main body with four organic correlation groups is formed. The LED device solves the problem that in the prior art, an LED device which is large in light-emitting angle and high in preparation efficiency and a preparation method of the LED device are lacked.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor devices, and in particular to an LED device and a preparation method thereof. Background Art

[0002] LED chip is a semiconductor electronic component that can emit light. It has the characteristics of small size, high brightness and low energy consumption. It is widely used in lighting and other fields. LED chip is a solid light source, which is a light-emitting device made of semiconductor PN junction. When the forward current is turned on, the minority carriers (i.e. electrons) and majority carriers (i.e. holes) in the semiconductor recombine, and the released energy is emitted in the form of photons or part of it in the form of photons. LED chip lighting has significant advantages such as high efficiency, energy saving, environmental protection and long service life. It has been widely used in various aspects such as street lights, display screens, indoor lighting and car lights. LED devices are composed of LED chip packages.

[0003] With the development of technology, the application fields of LED devices are becoming more and more extensive. In the field of LCD+LED backlight, the luminous performance and luminous uniformity of LED backlight modules are extremely important. Adding HDR through local dimming regional dimming technology can significantly enhance consumers' higher viewing experience. Regional dimming means multiple lights in one area and one light in one area. Therefore, the larger the luminous angle of the LED device, the greater the number of LED device areas can be, thereby reducing the cost of the backlight module.

[0004] However, in the prior art, the convex cup design is generally used to increase the light output at a large angle, but the diffusion effect is limited. There are also designs that increase the light output angle by setting silicone to adjust the silicone shape, but such large-angle products are often in the form of large panels (60*60cm). According to the conventional baking mode, the efficiency is very low, the number of baking equipment required is large, the cost is high, and the conventional silicone baking time is 80℃ / 1H+150℃ / 3H. Large panel products will deform and warp seriously under continuous high-temperature baking, so they cannot meet the application of large backplanes. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide an LED device and a method for preparing the same, so as to solve the problem in the prior art of lacking an LED device and a method for preparing the same with a large light-emitting angle and high preparation efficiency.

[0006] The present invention provides an LED device, comprising a substrate and a plurality of light-emitting devices arranged on the substrate, wherein a filter film is arranged on the top of the light-emitting device, the light-emitting device and the filter film are wrapped in the center of an apple heart-shaped rubber block, the light-emitting device is a five-sided light-emitting structure, the thixotropic coefficient of the apple heart-shaped rubber block is 4.5-5.5, the catalyst concentration during the preparation of the apple heart-shaped rubber block is 0.08%-0.14%, and the preparation temperature is 220°C-250°C.

[0007] The present invention sets a filter film on the top of the light-emitting device, so that the light intensity on the top of the light-emitting device is reduced and the light intensity around it is increased, thereby increasing the diffusion effect. In addition, the light is refracted toward the periphery through the curved surface effect around the apple heart-shaped rubber block, thereby effectively expanding the light output angle. Thus, the problem of insufficient light-emitting angle is solved. In addition, by controlling the thixotropic coefficient of the apple heart-shaped rubber block, the structure of the silica gel body is adjusted, so that the silica gel can be formed into an apple heart shape and the molding efficiency is improved. In addition, by adjusting the catalyst concentration doped during the preparation of the silica gel, the temperature during the baking of the silica gel is adjusted, so that the apple heart-shaped rubber block can be cured in a shorter time through various aspects of coordination, thereby avoiding the warping problem caused by long-term baking and improving the preparation efficiency of the product. Therefore, the present invention solves the problem of the lack of an LED device with a large light-emitting angle and high preparation efficiency and its preparation method in the prior art.

[0008] Preferably, the refractive index of the heart-shaped apple glue block is 1.46-1.50, and the heating time of the heart-shaped apple glue block is 5 min-20 min.

[0009] Preferably, the outer contour size of the apple heart-shaped rubber block is (5.8mm-6.2mm) x (5.8mm-6.2mm) x (2.3mm-2.7mm), the depth of the concave in the middle of the apple heart-shaped rubber block is 0.6mm-0.8mm, and the diameter of the concave area is 1.8mm-2.2mm.

[0010] Preferably, the apple heart-shaped rubber block is doped with organosilicon powder, and the content of the organosilicon powder is 0.5%-1%.

[0011] Preferably, the apple heart-shaped rubber block comprises silica gel, and during the silica gel synthesis stage, the phenyl monomer ratio of the silica gel is 23%-27%, thereby forming a silica gel main body with four organic related groups.

[0012] The present invention also provides a method for preparing an LED device, the method comprising:

[0013] Providing a substrate, and attaching a five-sided luminous device to the substrate;

[0014] A filter film is molded on the top of the light emitting device;

[0015] Prepare silica gel by a preset method, and form an apple heart-shaped glue block outside the light-emitting device by dispensing and baking, so that the light-emitting device and the filter film are wrapped in the center of the apple heart-shaped glue block;

[0016] The thixotropic coefficient of the heart-shaped apple rubber block is 4.5-5.5, the catalyst concentration during the preparation of the heart-shaped apple rubber block is 0.08%-0.14%, and the preparation temperature is 220°C-250°C.

[0017] Preferably, the step of molding a filter film on top of the light emitting device comprises:

[0018] Mixing the encapsulating transparent adhesive with the silicone powder to obtain a mixed adhesive;

[0019] Under the condition of an ambient temperature of 110° C.-140° C. and an ambient pressure of 1 KPa, the mixed glue is molded onto the top of the light emitting device to form the filter film, and the thickness of the filter film is 50 um-70 um.

[0020] Preferably, the step of preparing silica gel by a preset method comprises:

[0021] In the synthesis stage of the silica gel, the silica gel main body with four organic association groups is formed by increasing the proportion of phenyl monomers to 23%-27%;

[0022] 0.5%-1% of the organic silicon powder and 0.08%-0.14% of a catalyst are added to the silica gel body and stirred to form the silica gel for preparing the apple heart-shaped rubber block.

[0023] Preferably, the step of forming an apple heart-shaped glue block on the outside of the light-emitting device by means of glue dispensing and baking comprises:

[0024] Dispensing the light-emitting device with the silica gel by a dispensing machine, so that an arc-shaped colloid is formed on the outer side of the light-emitting device;

[0025] Pressure is applied to the middle of the colloid so that the colloid takes on an apple heart-shaped outline, and the colloid is baked at a high temperature of 220° C. to 250° C. for 5 min to 20 min to solidify the colloid.

[0026] Preferably, the light transmittance of the colloid after solidification is 40%-60%. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of an LED device in one embodiment of the present invention;

[0028] Figure 2is a flow chart of a method for preparing an LED device in one embodiment of the present invention;

[0029] Description of main component symbols:

[0030] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] like Figure 1 As shown, the present invention discloses a partial structural schematic diagram of an LED device, which includes a substrate 10, a plurality of light-emitting devices 20 arranged on the substrate, a filter film 30 arranged on the top of the light-emitting device 20, and an apple heart-shaped glue block 40 arranged on the outside of the light-emitting device 20 and wrapping the light-emitting device 20 and the filter film 30.

[0035] In the present embodiment, the thickness of the filter film 30 is 50um-70um, and exemplary, the thickness of the filter film 30 is 50um, 55um, 60um, 65um or 70um, but not limited thereto. The length of the heart-shaped apple block 40 is 5.8mm-6.2mm, and exemplary, the length of the heart-shaped apple block 40 is 5.8mm, 5.9mm, 6mm, 6.1 or 6.2mm, but not limited thereto. The width of the heart-shaped apple block 40 is 5.8mm-6.2 The width of the heart-shaped apple block 40 is 5.8 mm, 5.9 mm, 6 mm, 6.1 mm or 6.2 mm, but not limited thereto; the height of the heart-shaped apple block 40 is 2.3 mm-2.7 mm, and the height of the heart-shaped apple block 40 is 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm or 2.7 mm, but not limited thereto; the depth of the concave portion of the heart-shaped apple block 40 is 0.6 mm-0.8 mm, and ... The depth of the concave portion 40 is 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm or 0.8 mm, but not limited thereto. The diameter of the concave portion 40 is 1.8 mm-2.2 mm. For example, the diameter of the concave portion 40 is 1.8 mm, 1.9 mm, 2 mm, 2.1 mm or 2.2 mm, but not limited thereto. The refractive index of the heart-shaped apple block 40 is 1.46-1.5. For example, the heart-shaped apple block 4 0 has a refractive index of 1.46, 1.47, 1.48, 1.49 or 1.5, but is not limited thereto, a thixotropic coefficient of the heart-shaped apple rubber block 40 is 4.5-5.5, and exemplarily, the thixotropic coefficient of the heart-shaped apple rubber block 40 is 4.5, 4.7, 4.9, 5.1, 5.3 or 5.5, and a light transmittance of the heart-shaped apple rubber block 40 is 40%-60%, and exemplarily, the light transmittance of the heart-shaped apple rubber block 40 is 40%, 45%, 50%, 55% or 60%, but is not limited thereto.

[0036] In this embodiment, by setting a filter film 30 on the top of the light emitting device 20, the light intensity on the top of the light emitting device 20 is reduced, and the light intensity around it is increased, thereby increasing the diffusion effect. In addition, the light is refracted to the periphery by the curved surface effect around the apple heart-shaped rubber block 40, thereby effectively expanding the light output angle. Thus, the problem of insufficient light emitting angle is solved. In addition, by controlling the thixotropic coefficient of the apple heart-shaped rubber block 40, the structure of the silicone body is adjusted, so that the silicone can be formed into an apple heart shape and the molding efficiency is improved. In addition, by adjusting the catalyst concentration doped during the preparation of the silicone, the temperature of the silicone during baking is adjusted, so that through various aspects of coordination, the apple heart-shaped rubber block 40 can be cured in a shorter time, thereby avoiding the warping problem caused by long-term baking and improving the preparation efficiency of the product. Therefore, the present invention solves the problem of the lack of an LED device with a large light emitting angle and high preparation efficiency and its preparation method in the prior art.

[0037] Accordingly, refer to Figure 2 The present invention also discloses a method for preparing an LED device, which is used to prepare the above-mentioned LED device, wherein the preparation method comprises the following steps:

[0038] S100: providing a substrate, and attaching a five-sided light-emitting device to the substrate;

[0039] Specifically, the size of the substrate is 60cm*60cm.

[0040] S200: molding a filter film on the top of the light emitting device, and molding an apple heart-shaped glue block on the outside of the light emitting device, so that the light emitting device and the filter film are wrapped in the center of the apple heart-shaped glue block.

[0041] Specifically, S200 includes:

[0042] S201: mixing encapsulation transparent adhesive with silicone powder to obtain mixed adhesive;

[0043] Specifically, the organosilicon powder is a white spherical powder having a silane hydrophobic group on the surface of the powder. The spheres have good dispersibility and an average size of 2 um.

[0044] S202: Molding the mixed glue onto the top of the light-emitting device to form the filter film;

[0045] Specifically, the mixed glue is molded onto the top of the light emitting device to form the filter film, and the thickness of the filter film is 50um-70um. In addition, during the molding, the ambient pressure is 1KPa, and the ambient temperature is 110℃-140℃. For example, the ambient temperature is 110℃, 120℃, 130℃, 135℃ or 140℃, but not limited thereto.

[0046] S203: preparing a silica gel body, and mixing the silica gel body with a catalyst and organosilicon powder;

[0047] Specifically, by adjusting the proportion of phenyl monomers, a silica gel body with four organic related groups is formed. This achieves the adjustment of the thixotropic coefficient of the heart-shaped apple rubber block, and adjusts the structure of the silica gel body, so that the silica gel can form an apple heart shape and improve the molding efficiency. In addition, increasing the catalyst concentration can also speed up the molding of the heart-shaped apple rubber block, but the catalyst concentration needs to be reasonably controlled to prevent excessive concentration from affecting the glue output. In addition, the external temperature needs to be adjusted to prevent the reaction from being too fast and the temperature from being untimely, which affects the molding effect. Specifically, the proportion of phenyl monomer is 23%-27%, and exemplary, the proportion of phenyl monomer is 23%, 24%, 25%, 26% or 27%, but not limited thereto; the concentration of the catalyst is 0.08%-0.14%, and exemplary, the concentration of the catalyst is 0.08%, 0.09%, 0.1%, 0.11%, 0.12%, 0.13% or 0.14%, but not limited thereto; the proportion of silicone powder is 0.5%-1%, and exemplary, the proportion of silicone powder is 0.5%, 0.61%, 0.71%, 0.81%, 0.91% or 1%, but not limited thereto.

[0048] S204: dispensing the light emitting device with the dispensing machine according to the silica gel, so that an arc-shaped colloid is formed on the outer side of the light emitting device, and then applying pressure to the middle of the colloid, so that the colloid has an apple heart-shaped outline;

[0049] Specifically, the colloid is baked to solidify the colloid into shape, and the baking temperature is 220°C-250°C. Exemplarily, the baking temperature is 220°C, 225°C, 230°C, 235°C, 240°C, 245°C or 250°C, but not limited to this; the baking time is 5min-20min. Exemplarily, the baking time is 5min, 10min, 15min or 20min, but not limited to this.

[0050] The present invention is further described below with specific embodiments:

[0051] Embodiment 1

[0052] This embodiment provides an LED device, which includes a substrate, a plurality of light-emitting devices arranged on the substrate, a filter film arranged on the top of the light-emitting devices, and an apple heart-shaped glue block arranged on the outside of the light-emitting devices and wrapping the light-emitting devices and the filter film.

[0053] In this embodiment, the thickness of the filter film is 60um, the length of the apple heart-shaped rubber block is 6mm, the width of the apple heart-shaped rubber block is 6mm, and the height of the apple heart-shaped rubber block is 2.5mm; the depth of the concave in the middle of the apple heart-shaped rubber block is 0.7mm, and the diameter of the concave in the middle of the apple heart-shaped rubber block is 2mm. The refractive index of the apple heart-shaped rubber block is 1.48, the thixotropic coefficient of the apple heart-shaped rubber block is 5, and the light transmittance of the apple heart-shaped rubber block is 50%.

[0054] The method for preparing the LED device in this embodiment comprises the following steps:

[0055] (1): providing a substrate, and attaching a five-sided light-emitting device to the substrate;

[0056] In this embodiment, the size of the substrate is 60 cm*60 cm.

[0057] (2): A filter film is molded on the top of the light-emitting device, and an apple heart-shaped rubber block is molded outside the light-emitting device, so that the light-emitting device and the filter film are wrapped in the center of the apple heart-shaped rubber block;

[0058] Specifically, step (2) includes:

[0059] Mixing the encapsulating transparent adhesive with the silicone powder to obtain a mixed adhesive;

[0060] Specifically, the organosilicon powder is a white spherical powder having a silane hydrophobic group on the surface of the powder. The spheres have good dispersibility and an average size of 2 um.

[0061] Molding the mixed glue onto the top of the light emitting device to form the filter film;

[0062] Specifically, the mixed glue is molded onto the top of the light emitting device to form the filter film, and the thickness of the filter film is 60 um. In addition, during the molding, the ambient pressure is 1 KPa and the ambient temperature is 125°C.

[0063] preparing a silica gel body, and mixing the silica gel body with a catalyst and an organosilicon powder;

[0064] Specifically, the proportion of phenyl monomers is adjusted to form a silica gel main body with four organic related groups. Specifically, the proportion of phenyl monomers is 25%, the concentration of catalyst is 0.1%, and the proportion of organic silicon powder is 0.75%.

[0065] The light emitting device is dispensed with the silica gel by a dispensing machine to form an arc-shaped colloid on the outer side of the light emitting device, and then pressure is applied to the middle of the colloid to form an apple heart-shaped outline;

[0066] Specifically, the colloid is baked to solidify the colloid into a shape, the baking temperature is 235° C., and the baking time is 10 minutes.

[0067] Embodiment 2

[0068] This embodiment also provides an LED device and a method for preparing the same. The difference from the first embodiment is that the thixotropic coefficient of the heart-shaped apple glue is 4.5.

[0069] Embodiment 3

[0070] This embodiment also provides an LED device and a method for preparing the same. The difference from the first embodiment is that the thixotropic coefficient of the heart-shaped apple glue is 4.7.

[0071] Embodiment 4

[0072] This embodiment also provides an LED device and a preparation method thereof. The difference from the first embodiment is that the thixotropic coefficient of the heart-shaped apple glue is 5.3.

[0073] Embodiment 5

[0074] This embodiment also provides an LED device and a preparation method thereof. The difference from the first embodiment is that the thixotropic coefficient of the heart-shaped apple glue is 5.5.

[0075] Embodiment 6

[0076] This embodiment also provides an LED device and a method for preparing the same. The difference from the first embodiment is that the refractive index of the heart-shaped apple glue is 1.43.

[0077] Embodiment 7

[0078] This embodiment also provides an LED device and a method for preparing the same. The difference from the first embodiment is that the refractive index of the heart-shaped apple glue is 1.46.

[0079] Embodiment 8

[0080] This embodiment also provides an LED device and a method for preparing the same. The difference from the first embodiment is that the refractive index of the heart-shaped apple glue is 1.5.

[0081] Embodiment 9

[0082] This embodiment also provides an LED device and a method for preparing the same. The difference from the first embodiment is that the refractive index of the heart-shaped apple glue is 1.52.

[0083] Embodiment 10

[0084] This embodiment also provides an LED device and a method for preparing the same. The difference from the first embodiment is that the refractive index of the heart-shaped apple glue is 1.55.

[0085] Embodiment 11

[0086] This embodiment also provides an LED device and a preparation method thereof, which is different from the first embodiment in that the catalyst concentration is 0.04% during the preparation of silica gel.

[0087] Embodiment 12

[0088] This embodiment also provides an LED device and a preparation method thereof, which is different from the first embodiment in that the catalyst concentration is 0.06% during the preparation of silica gel.

[0089] Embodiment 13 This embodiment also provides an LED device and a preparation method thereof. The difference from Embodiment 1 is that during the preparation of silica gel, the catalyst concentration is 0.08%.

[0090] Embodiment 14

[0091] This embodiment also provides an LED device and a preparation method thereof, which is different from the first embodiment in that the catalyst concentration is 0.12% during the preparation of silica gel.

[0092] Embodiment 15

[0093] This embodiment also provides an LED device and a preparation method thereof, which is different from the first embodiment in that the catalyst concentration is 0.14% during the preparation of silica gel.

[0094] Comparative Example 1

[0095] This comparative example provides an LED device and a preparation method thereof, which are prepared by adopting the existing process preparation method of a large-angle LED device with silica gel.

[0096] In the specific implementation, LED devices are prepared according to the process flow and process parameters defined in the above-mentioned embodiments 1 to 15 and comparative example 1, and the parameters of the prepared devices are measured, and the molding time and temperature are counted. In comparative example 1, the results are shown in Table 1:

[0097] Table 1

[0098]

[0099]

[0100] As can be seen from Table 1, the LED device prepared by the LED device obtained by the method in the embodiment of the present invention, under the condition of meeting the adhesion premise, the baking molding time of the rubber block is much shorter than the baking molding time of the prior art, and according to Examples 1 to 5, it can be seen that if the thixotropic coefficient is too small, the size of the apple heart-shaped rubber block will be difficult to control during molding, and if the thixotropic coefficient is too large, the apple heart-shaped rubber block will be soft during molding, and the online time after molding will be short, and it is easy to separate from the PCB. According to Examples 1 and 6 to 10, although a smaller refractive index will increase the light output angle of the finished device, it will cause the silicone to be soft, and the viscosity will be large after molding, making it unusable. As the refractive index increases, the light output angle of the finished device will gradually decrease. Therefore, there is an optimal refractive index parameter, which ensures the light output angle of the finished device and ensures that the device can be used normally. From Examples 1 and 11 to 15, it can be seen that as the catalyst concentration increases, the rubber block molding speed will increase significantly, but the required temperature will also increase. However, if the catalyst concentration is too high, it will cause solidification in the dispensing tube, affecting production efficiency. Therefore, the catalyst concentration needs to be reasonably controlled. In actual production, after the temperature reaches above 220°C, reflow soldering is usually used, and the temperature and time of reflow soldering are usually within a range. Therefore, the above experimental data does not provide accurate temperature and baking time. However, the baking time and the corresponding temperature range can be determined, and the baking time is significantly lower than the time required by the existing technology.

[0101] In summary, the LED device and its preparation method in the embodiment of the present invention, by setting a filter film on the top of the light-emitting device, the light intensity at the top of the light-emitting device is reduced, and the light intensity around is increased, thereby increasing the diffusion effect. In addition, the light is refracted to the periphery through the curved surface effect around the apple heart-shaped rubber block, thereby effectively expanding the light output angle. Thus, the problem of insufficient light-emitting angle is solved. In addition, by controlling the thixotropic coefficient of the apple heart-shaped rubber block, the structure of the silicone body is adjusted, so that the silicone can be formed into an apple heart shape, and the molding efficiency is improved. In addition, by adjusting the catalyst concentration doped during the preparation of the silicone, the temperature of the silicone during baking is adjusted, so that through various aspects of coordination, the apple heart-shaped rubber block can be cured in a shorter time, thereby avoiding the warping problem caused by long-term baking and improving the preparation efficiency of the product. Therefore, the present invention solves the problem of the lack of an LED device and its preparation method with a large light-emitting angle and high preparation efficiency in the prior art.

[0102] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0103] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An LED device, characterized in that: It includes a substrate and a plurality of light-emitting devices arranged on the substrate, a filter film is arranged on the top of the light-emitting device, the light-emitting device and the filter film are wrapped in the center of an apple heart-shaped rubber block, the light-emitting device is a five-sided light-emitting structure, the thixotropic coefficient of the apple heart-shaped rubber block is 4.5-5.5, the catalyst concentration during the preparation of the apple heart-shaped rubber block is 0.08%-0.14%, and the preparation temperature is 220℃-250℃.

2. The LED device according to claim 1, characterized in that: The refractive index of the heart-shaped apple glue block is 1.46-1.50, and the heating time of the heart-shaped apple glue block is 5 min-20 min.

3. The LED device according to claim 2, characterized in that: The outer contour dimensions of the heart-shaped apple rubber block are (5.8mm-6.2mm) x (5.8mm-6.2mm) x (2.3mm-2.7mm), the concave depth in the middle of the heart-shaped apple rubber block is 0.6mm-0.8mm, and the diameter of the concave area is 1.8mm-2.2mm.

4. The LED device according to claim 1, characterized in that: The apple heart-shaped rubber block is doped with organic silicon powder, and the content of the organic silicon powder is 0.5%-1%.

5. The LED device according to claim 1, characterized in that: The components of the apple heart-shaped rubber block include silica gel. During the silica gel synthesis stage, the proportion of phenyl monomers in the silica gel is 23%-27%, thereby forming a silica gel main body with four organic related groups.

6. A method for preparing an LED device, characterized in that: Used for preparing the LED device according to any one of claims 1 to 5, the preparation method comprising: Providing a substrate, and attaching a five-sided luminous device to the substrate; A filter film is molded on the top of the light emitting device; Prepare silica gel by a preset method, and form an apple heart-shaped glue block outside the light-emitting device by dispensing and baking, so that the light-emitting device and the filter film are wrapped in the center of the apple heart-shaped glue block; The thixotropic coefficient of the heart-shaped apple rubber block is 4.5-5.5, the catalyst concentration during the preparation of the heart-shaped apple rubber block is 0.08%-0.14%, and the preparation temperature is 220°C-250°C.

7. The method for preparing an LED device according to claim 6, characterized in that: The step of molding the filter film on the top of the light emitting device comprises: Mixing the encapsulating transparent adhesive with the silicone powder to obtain a mixed adhesive; Under the condition of an ambient temperature of 110° C.-140° C. and an ambient pressure of 1 KPa, the mixed glue is molded onto the top of the light emitting device to form the filter film, and the thickness of the filter film is 50 um-70 um.

8. The method for preparing an LED device according to claim 7, characterized in that: The step of preparing silica gel by a preset method comprises: In the synthesis stage of the silica gel, the silica gel main body with four organic association groups is formed by increasing the proportion of phenyl monomer to 23%-27%; 0.5%-1% of the organic silicon powder and 0.08%-0.14% of a catalyst are added to the silica gel body and stirred to form the silica gel for preparing the apple heart-shaped rubber block.

9. The method for preparing an LED device according to claim 8, characterized in that: The step of forming an apple heart-shaped glue block on the outside of the light-emitting device by means of glue dispensing and baking comprises: Dispensing the light-emitting device with the silica gel by a dispensing machine, so that an arc-shaped colloid is formed on the outer side of the light-emitting device; Pressure is applied to the middle of the colloid so that the colloid takes on an apple heart-shaped outline, and the colloid is baked at a high temperature of 220° C. to 250° C. for 5 min to 20 min to solidify the colloid.

10. The method for preparing an LED device according to claim 9, characterized in that: The light transmittance of the colloid after solidification is 40%-60%.

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