LED light emitting device and preparation method thereof

Abstract

The present invention provides an LED light-emitting device and a preparation method thereof. The LED light-emitting device comprises an LED bracket. A reflective lamp cup is provided on the top of the LED bracket. An LED chip is arranged in the reflective lamp cup. A truncated cone structure is provided on the LED bracket. The truncated cone structure comprises a filling layer, a protective layer and an angle expansion layer. The filling layer is filled in the reflective lamp cup. The protective layer is arranged on the filling layer. The angle expansion layer is arranged in the protective layer. The angle expansion layer is composed of a plurality of gradient components. The gradient components comprise a hollow shell and a gradient body filled in the hollow shell. The gradient body produces a gradient from the center to the outside. All the gradient components are arranged on the top of the protective layer to realize a large-angle LED device, thereby improving the light-emitting angle.

Description

Technical Field

[0001] The invention belongs to the technical field of television backlight, and in particular relates to an LED light-emitting device and a preparation method thereof. Background Art

[0002] 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 or one light in one area. Therefore, the larger the LED luminous angle, the greater the number of LED areas can be reduced, thereby reducing the cost of the backlight module.

[0003] In the prior art, the light-emitting angle is generally increased by a convex cup. However, relying solely on the convex cup to increase the light-emitting angle will result in a general light-emitting angle, which cannot meet market demand well. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an LED light-emitting device and a preparation method thereof, which are used to solve the above background technical problems.

[0005] On the one hand, the invention provides the following technical solutions: an LED light-emitting device, comprising an LED bracket, a reflective lamp cup being provided on the top of the LED bracket, an LED chip being arranged in the reflective lamp cup, a truncated cone structure being provided on the LED bracket, the truncated cone structure comprising a filling layer, a protective layer and an angle expansion layer, the filling layer being filled in the reflective lamp cup, the protective layer being arranged on the filling layer, the angle expansion layer being arranged in the protective layer, the angle expansion layer being composed of a plurality of gradient components, the gradient components comprising a hollow shell, and a gradient body filled in the hollow shell, the gradient body generating a gradient from the center to the outside, wherein all the gradient components are arranged on the top of the protective layer.

[0006] Compared with the prior art, the beneficial effects of the present invention are: by introducing a number of gradient components on the basis of the convex cup, the thickness of the upper optical layer of the light-emitting center is increased to reduce the light emission in the center of the chip and reduce the brightness of the center point, so that the relative value of the brightness around is relatively improved, and a large-angle LED device is realized, thereby increasing the light-emitting angle and being more suitable for market demand.

[0007] Furthermore, a plurality of through holes are formed on the outer side of the hollow shell, and the through holes are connected to the interior of the hollow shell, so that the gradient body can enter the interior of the hollow shell.

[0008] Furthermore, the gradient body includes a colloid and TiO2 powder, and the TiO2 powder is arranged at the center of the colloid so that the gradient body forms a white light area and a dark light area.

[0009] Furthermore, the size of the white light area ranges from 8um to 20um.

[0010] Furthermore, the hollow shell is in the shape of a hollow sphere, and the hollow shell is glass powder particles.

[0011] Furthermore, the size of the hollow shell ranges from 30um to 100um.

[0012] Furthermore, the filling layer is fluorescent glue containing fluorescent powder, the protective layer is transparent glue, and the protective layer is in a truncated cone shape.

[0013] On the other hand, the present invention also provides a method for preparing an LED light-emitting device, the method comprising the following steps:

[0014] Providing an LED bracket with a reflective lamp cup;

[0015] Installing an LED chip in the reflective lamp cup, and filling the reflective lamp cup with fluorescent glue containing fluorescent powder to form a filling layer;

[0016] Providing a plurality of hollow shells, placing TiO2 powder and the plurality of hollow shells in a transparent glue, and stirring the transparent glue so that the TiO2 powder enters the hollow shells to form a preliminary gradient component, wherein the hollow shells are provided with a plurality of through holes;

[0017] The transparent glue with the preliminary gradient component is dispensed on the filling layer by a dispensing machine to form a protective layer, and the layer is left to stand for a preset time so that the preliminary gradient component is suspended on the top of the protective layer due to the hollow buoyancy of the hollow shell to form a gradient component.

[0018] Furthermore, the preset time ranges from 10 minutes to 50 minutes.

[0019] Furthermore, after the step of forming the gradient component, the preparation method further comprises:

[0020] The LED bracket with the gradient component is baked at a preset temperature so that the gradient component is solidified in the protective layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the LED light emitting device in the first embodiment of the present invention.

[0022] Figure 2It is a schematic diagram of the structural flow of the LED light emitting device in the first embodiment of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the gradual change component of the LED light emitting device in the first embodiment of the present invention.

[0024] Figure 4 It is a schematic structural diagram of the angle expansion layer of the LED light-emitting device in the first embodiment of the present invention.

[0025] Figure 5 In the first embodiment of the present invention Figure 2 Enlarged structural diagram at A in the middle.

[0026] Figure 6 It is a line graph of the light emitting angle of the LED light emitting device in the first embodiment of the present invention.

[0027] Figure 7 This is a flow chart of a method for preparing an LED light-emitting device in the second embodiment of the present invention.

[0028] Explanation of the main component symbols: 10, LED bracket; 11, reflector lamp cup; 12, LED chip; 20, filling layer; 30, protective layer; 40, angle expansion layer; 41, gradient component; 411, hollow shell; 412, gradient body; 4121, colloid; 4122, TiO2 powder; 4123, white light area; 4124, dark area.

[0029] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. 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 of the related listed items.

[0033] Embodiment 1

[0034] See also Figures 1 to 6 , shown is an LED light-emitting device in the first embodiment of the present invention, including an LED bracket 10, a reflective lamp cup 11 is opened on the top of the LED bracket 10, an LED chip 12 is arranged in the reflective lamp cup 11, a truncated cone structure is arranged on the LED bracket 10, and the truncated cone structure includes a filling layer 20, a protective layer 30 and an angle expansion layer 40, the filling layer 20 is filled in the reflective lamp cup 11, the protective layer 30 is arranged on the filling layer 20, and the angle expansion layer 40 is arranged in the protective layer 30, the angle expansion layer 40 is composed of a plurality of gradient components 41, the gradient component 41 includes a hollow shell 411, and a gradient body 412 filled in the hollow shell 411, the gradient body 412 produces a gradient from the center to the outside, wherein all the gradient components 41 are arranged on the top of the protective layer 30.

[0035] It is worth noting that by introducing a number of gradient components 41 on the basis of the convex cup, the thickness of the upper optical layer of the light-emitting center is increased to reduce the light emission in the center of the chip and reduce the brightness of the center point, so that the relative value of the brightness around is relatively improved, realizing a large-angle LED device, thereby increasing the light-emitting angle and being more suitable for market demand.

[0036] Furthermore, a plurality of through holes are provided on the outer side of the hollow shell 411, and the through holes are connected to the inside of the hollow shell 411, so that the gradient body 412 can enter the inside of the hollow shell 411. In a specific implementation, the TiO2 powder 4122 can enter the inside of the hollow shell 411 by stirring.

[0037] Further, the gradient body 412 includes a colloid 4121 and a TiO2 powder 4122, and the TiO2 powder 4122 is disposed at the center of the colloid 4121, so that the gradient body 412 forms a white light area 4123 and a dark area 4124. It is understandable that the white light area 4123 is composed of the TiO2 powder 4122, and the dark area 4124 is composed of the colloid 4121.

[0038] Further, the white light area 4123 is arranged at the center of the dark area 4124, and the size of the white light area 4123 ranges from 8um to 20um. The hollow shell 411 is a hollow sphere, and the hollow shell 411 is a glass powder particle. The size of the hollow shell 411 ranges from 30um to 100um. In this embodiment, there are a plurality of hollow spheres, and the sizes of the hollow spheres are different, so that the sizes of the white light area 4123 are also different.

[0039] In this embodiment, the filling layer 20 is fluorescent glue containing fluorescent powder, the protective layer 30 is transparent glue, and the protective layer 30 is in a truncated cone shape.

[0040] Specifically, the gradient component 41 is a three-layer structure composed of a hollow shell, silica gel (colloid) and TiO2 powder 4122 from outside to inside. After the three-layer structure is formed, the hollow shell (glass powder particles) is light-colored, the silica gel is dark-colored, and the TiO2 powder 4122 is white.

[0041] It is worth explaining that after the three-layer structure is mixed with the transparent glue, the three-layer structure floats in the transparent glue due to the buoyancy of the hollow shell itself. At this time, all the three-layer structures gather to the top of the protective layer of the lamp bead, and the closer to the top of the protective layer, the more the three-layer structure, that is, the more TiO2 powder 4122 (white light area 4123) gathers on the top of the protective layer. At this time, looking from the front of the lamp bead, the top of the lamp bead forms a gradual whitening from the surroundings to the center, and the whiteness increases towards the middle; because the chip emits the strongest light directly above, the middle of the gradual whitening is located directly above the chip to lower the brightness in the middle of the chip, so that the relative value of the brightness around is relatively improved, achieving the effect of reducing the light emission in the center of the lamp bead, thereby achieving large-angle light emission.

[0042] It is understandable that, in actual specific gravity, white TiO2 powder dispersed in transparent glue will sink. By first embedding the white TiO2 powder into the hollow shell, the hollow shell can float with the white TiO2 powder in the transparent glue.

[0043] Embodiment 2

[0044] See also Figure 7 , which shows a method for preparing an LED light-emitting device in a second embodiment of the present invention, the method comprises the following steps: step S01-step S04;

[0045] S01: Provide an LED bracket with a reflective lamp cup;

[0046] S02: installing an LED chip in the reflector lamp cup, and filling the reflector lamp cup with fluorescent glue containing fluorescent powder to form a filling layer;

[0047] S03: providing a plurality of hollow shells, placing TiO2 powder and the plurality of hollow shells in a transparent glue, and stirring the transparent glue so that the TiO2 powder enters the hollow shells to form a preliminary gradient component, wherein the hollow shells are provided with a plurality of through holes;

[0048] S04: Use a dispensing machine to dispense the transparent glue with the preliminary gradient component on the filling layer to form a protective layer, and let it stand for a preset time so that the preliminary gradient component is suspended on the top of the protective layer due to the hollow buoyancy of the hollow shell to form a gradient component.

[0049] Optionally, the preset time ranges from 10 min to 50 min, and the preset time is 10 min, 30 min or 50 min.

[0050] Specifically, after the step of forming the gradient component, the preparation method further comprises:

[0051] The LED bracket with the gradient component is baked at a preset temperature so that the gradient component is solidified in the protective layer.

[0052] In this embodiment, TiO2 powder (white light area): solid sphere, size 8um -20um, white, its mass sinks in the transparent glue; TiO2 powder accumulates to form a white sedimentary layer to achieve light blocking effect;

[0053] Microporous structure (hollow shell): hollow sphere 30u -100um, transparent, floats in transparent glue due to its light weight;

[0054] The microporous structure and TiO2 powder are stirred and mixed in transparent glue. At this time, the TiO2 powder is embedded in the microporous structure so that the microporous structure contains TiO2 powder to form a preliminary gradient component. The transparent glue with the preliminary gradient component is glued into the bracket and left to stand for 30 minutes. The microporous structure containing TiO2 powder floats up by the buoyancy of the microporous structure itself, so that several gradient components are gathered on the top of the protective layer (transparent glue), forming a gradient white from the periphery of the lamp bead to the center, and the whiteness of the middle part is the greatest; the light emitted by the chip is strongest in the center, and through its gradient white, large-angle light emission is achieved.

[0055] In summary, the LED light-emitting device and preparation method in the above embodiments of the present invention, by introducing a number of gradient components on the basis of the convex cup, increase the thickness of the upper optical layer of the light-emitting center to reduce the light emission in the center of the chip and reduce the brightness of the center point, thereby realizing a large-angle LED device and achieving 150° large-angle light emission, thereby increasing the light-emitting angle and being more suitable for market demand.

[0056] 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 representation of the above terms does 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.

[0057] 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 light-emitting device, characterized in that: It includes an LED bracket, a reflective lamp cup is opened on the top of the LED bracket, an LED chip is arranged in the reflective lamp cup, a truncated cone structure is arranged on the LED bracket, the truncated cone structure includes a filling layer, a protective layer and an angle expansion layer, the filling layer is filled in the reflective lamp cup, the protective layer is arranged on the filling layer, the angle expansion layer is arranged in the protective layer, the angle expansion layer is composed of a plurality of gradient components, the gradient components include a hollow shell, and a gradient body filled in the hollow shell, the gradient components produce a gradient from the center to the outside, so that the top of the lamp bead forms a gradient white from the surrounding to the center, wherein all the gradient components are arranged on the top of the protective layer.

2. The LED light emitting device according to claim 1, characterized in that: A plurality of through holes are formed on the outer side of the hollow shell, and the through holes are communicated with the interior of the hollow shell so that the gradient body can enter the interior of the hollow shell.

3. The LED light emitting device according to claim 1, characterized in that: The gradient body comprises a colloid and TiO2 powder, wherein the TiO2 powder is arranged at the center of the colloid, so that the gradient body forms a white light area and a dark light area.

4. The LED light emitting device according to claim 3, characterized in that: The size of the white light area ranges from 8um to 20um.

5. The LED light emitting device according to claim 1, characterized in that: The hollow shell is in the shape of a hollow sphere and is made of glass powder particles.

6. The LED light emitting device according to claim 1, characterized in that: The size of the hollow shell is in the range of 30um-100um.

7. The LED light emitting device according to claim 1, characterized in that: The filling layer is fluorescent glue containing fluorescent powder, the protective layer is transparent glue, and the protective layer is in a truncated cone shape.

8. A method for preparing an LED light-emitting device according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: Providing an LED bracket with a reflective lamp cup; Installing an LED chip in the reflective lamp cup, and filling the reflective lamp cup with fluorescent glue containing fluorescent powder to form a filling layer; Providing a plurality of hollow shells, placing TiO2 powder and the plurality of hollow shells in a transparent glue, and stirring the transparent glue so that the TiO2 powder enters the hollow shells to form a preliminary gradient component, wherein the hollow shells are provided with a plurality of through holes; The transparent glue with the preliminary gradient component is dispensed on the filling layer by a dispensing machine to form a protective layer, and the layer is left to stand for a preset time so that the preliminary gradient component is suspended on the top of the protective layer due to the hollow buoyancy of the hollow shell to form a gradient component.

9. The method for preparing an LED light emitting device according to claim 8, characterized in that: The preset time ranges from 10 min to 50 min.

10. The method for preparing an LED light emitting device according to claim 8, characterized in that: After the step of forming the gradient component, the preparation method further comprises: The LED bracket with the gradient component is baked at a preset temperature so that the gradient component is solidified in the protective layer.

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