LED lighting equipment based on weak blue light design

Abstract

The utility model discloses an LED lighting device based on weak blue light design, which comprises a lamp holder, a lamp pole and a lamp cap, a lamp cap cavity is formed in the lamp cap, an LED lamp source is arranged in the lamp cap cavity, the LED lamp source comprises a UV-LED chip module and a three-primary-color fluorescent glue layer, the UV-LED chip module comprises a substrate and a UV-LED chip, the UV-LED chip is fixed on the substrate, and the three-primary-color fluorescent glue layer is arranged on the substrate. And the three-primary-color fluorescent glue layer covers the surface of the UV-LED chip. The LED lamp source further comprises a second lampshade and at least two UV absorption layers, the UV-LED chip module is located in a lamp source cavity in the second lampshade, the two UV absorption layers sequentially cover the outer surface of the second lampshade from inside to outside, and the UV absorption layers comprise carbon-based quantum dots. The UV-LED chip is adopted to replace a traditional blue light chip, the three-primary-color fluorescent glue layer is excited by ultraviolet light or near ultraviolet light to synthesize white light, and due to the fact that blue light is not directly emitted by the LED chip, blue light radiation can be greatly reduced, and emission of the blue light component is reduced from the source of a lamp. And moreover, the quantum dot UV absorption layer is coated outside the LED lamp source, so that ultraviolet radiation emitted by the chip module can be absorbed and shielded, and the damage of the ultraviolet radiation to a human body is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of lighting fixtures, and in particular to an LED lighting device based on a weak blue light design. Background Technology

[0002] Since its commercialization in the 1990s, LED lighting technology has rapidly gained popularity due to its advantages such as high efficiency, energy saving, and long lifespan. However, most traditional white LED lamps use blue LED chips (such as blue GaN-LED chips) to excite yellow phosphors (such as YAG:Ce). 3+ The light-emitting principle of white LEDs results in a higher proportion of blue light (400-500nm) in the spectrum. Visually, blue light can penetrate the lens and reach the retina, causing photochemical damage, accelerating the oxidation of macular cells, and leading to vision loss, cataracts, and even blindness. Biologically, blue light in white LEDs inhibits the secretion of melatonin, thus causing sleep disorders and a series of physiological dysfunctions.

[0003] The mainstream methods for reducing blue light (weak blue light) currently include the following:

[0004] 1. Optimize the structure of the lamp: partially filter blue light through the structure of the lamp (such as the lampshade) to reduce blue light. For example, through the secondary light distribution design of the lamp, such as lenses, honeycomb grids, reflectors, etc., the direction and intensity distribution of light can be changed to reduce the direct exposure of blue light to the human eye;

[0005] 2. Choose low color temperature lamps: LED lamps with low color temperature (e.g., below 3000K) usually contain less blue light. Choosing low color temperature lamps can reduce blue light exposure to some extent.

[0006] 3. Adjust usage environment and habits: When using LED lights, reduce blue light exposure by adjusting the brightness, angle, or usage time of the lights. For example, avoid looking directly at the light source for a long time, or use low-brightness, low-color-temperature lights at night.

[0007] In addition, there are many existing technologies that use LED chip combinations to optimize and reduce blue light, but most of these solutions improve the light transmission process of LED lamps or user habits, and thus have limited blue light filtering capabilities. Utility Model Content

[0008] In order to overcome the technical problem of limited blue light optimization effect of the prior art, the present invention provides an LED lighting device based on weak blue light design. This LED lighting device based on weak blue light design can reduce blue light radiation at the source of the device, thereby significantly reducing the harm of "blue enrichment" of LED lamps.

[0009] The technical solution adopted by this utility model to solve its problem is:

[0010] An LED lighting device based on a low-blue-light design includes a lamp holder, a lamp pole, and a lamp head. The upper and lower ends of the lamp pole are movably connected to the lamp head and the lamp holder, respectively. The lamp head includes a base, a housing, and a first lampshade. The housing, base, and first lampshade form a lamp head cavity. An LED light source is disposed within the lamp head cavity. The LED light source includes:

[0011] A UV-LED chip module and a three-primary-color phosphor layer are provided. The UV-LED chip module includes a substrate and a UV-LED chip. The substrate is fixed to the base, the UV-LED chip is fixed to the substrate, and the three-primary-color phosphor layer is disposed covering the surface of the UV-LED chip.

[0012] The second lampshade and at least two UV absorption layers are fixed to the base. The second lampshade and the base form a lamp source cavity. The UV-LED chip module is located in the lamp source cavity. The UV absorption layers cover the outer surface of the second lampshade from the inside to the outside. The UV absorption layers contain carbon-based quantum dots.

[0013] In the above scheme, the LED light source includes a UV-LED chip module and a three-color phosphor layer. The three-color phosphor layer emits three colors of light (including blue light) under the excitation of ultraviolet or near-ultraviolet light emitted by the UV-LED chip module and synthesizes white light. Since the blue light of the LED light source is not directly emitted by the LED chip, but is generated by the photoluminescence of the phosphor, the blue light radiation can be greatly reduced.

[0014] Furthermore, the LED light source also includes a second lampshade located outside the UV-LED chip module. The surface of the second lampshade is coated with a multi-layer UV absorption layer containing carbon-based quantum dots. On the one hand, the quantum dot absorption layer can effectively absorb the blue light generated by the UV-LED chip module and convert it into light of other wavelengths, significantly reducing the amount of blue light radiation. On the other hand, it can also absorb and shield the ultraviolet radiation emitted by the UV-LED chip module, effectively avoiding the harm of ultraviolet radiation to the human body.

[0015] As a preferred embodiment, the LED light source further includes a heat sink, which is fixed to the base, and the substrate and the heat sink are attached together.

[0016] In the above solution, by designing the heat sink and the substrate of the UV-LED chip module to be bonded together, the heat dissipation efficiency of the UV-LED chip module can be significantly improved and the lifespan of the LED light source can be extended.

[0017] As a preferred embodiment, the three-primary-color fluorescent adhesive layer includes red phosphor, green phosphor, blue phosphor and encapsulating resin, specifically a fluorescent film structure formed by uniformly mixing red phosphor, green phosphor, blue phosphor and encapsulating resin.

[0018] As a preferred embodiment, the red phosphor can be Sr2Si5N8:Eu. 3+ The green phosphor can be selected from Lu3Al5O 12 :Ce 3+ The blue phosphor can be BaMgAl 10 O 17 Eu 2+ The encapsulating resin includes silicone resin and epoxy resin.

[0019] As a preferred embodiment, the UV absorption layer further includes a UV-curable substrate, wherein the carbon-based quantum dots are dispersed in the UV-curable substrate, specifically a film structure formed by dispersing carbon-based quantum dots in a UV-curable substrate solution (e.g., polyvinyl alcohol or polyurethane aqueous solution) and then curing it.

[0020] As a preferred embodiment, the UV absorption layer consists of two layers, with the inner UV absorption layer having a thickness of 20–40 μm, and preferably 30 μm; and the outer UV absorption layer having a thickness of 40–60 μm, and preferably 50 μm.

[0021] As a preferred embodiment, the UV-LED chip has an emission peak wavelength range of 340–405 nm, thus avoiding the strong blue light emission of traditional blue light chips.

[0022] As a preferred embodiment, the color temperature range of the LED light source is 2700K-6500K, and the color coordinates meet the requirements of CIE1931 standard: x = 0.28-0.45, y = 0.25-0.40.

[0023] As a preferred embodiment, a lamp connection portion is provided between the lamp pole and the lamp holder, and between the lamp pole and the lamp head. The lamp connection portion includes a first connection portion and a second connection portion that are rotatably connected. The first connection portion is rotatably connected to the lamp pole, and the second connection portion is fixedly connected to the lamp holder or the lamp head.

[0024] Specifically, the first connecting part and the lamp post can be rotatably connected by a bearing, which allows the lamp to be adjusted in the horizontal direction. This structural design allows the lamp to rotate freely in the horizontal plane, so that the light can be irradiated in different directions as needed. The first connecting part and the second connecting part can be rotatably connected by a bearing or a bearing seat, and the second connecting part is fixedly connected to the lamp holder or lamp head, thereby allowing the lamp to be adjusted in the vertical direction. This vertical adjustment is mainly used to adjust the elevation or depression angle of the light. For example, the projection angle of the light can be adjusted according to the lighting needs to avoid the light shining directly into the user's eyes or to improve the lighting efficiency.

[0025] As a preferred embodiment, the LED lighting device designed for weak blue light also includes a spring damping component, which is provided between the first connecting part and the second connecting part, and the compression degree of the spring damping component is adjustable.

[0026] Specifically, the spring damping component can be a spring or torsion spring structure with pins on both sides. It is set between the first connecting part and the second connecting part by bolts or other connecting parts. One side of the pin is connected to the first connecting part and the second connecting part, and the other side of the pin is connected to the bolt or other connecting parts. In this way, the compression degree of the spring can be adjusted when installing the lamp, so that the friction coefficient reaches the preset value, making it convenient for users to use the LED lighting equipment of this utility model.

[0027] In summary, the LED lighting device based on weak blue light design provided by this utility model has at least the following technical advantages compared to the prior art:

[0028] 1) This invention replaces traditional blue light chips (such as blue GaN-LED chips) with UV-LED chips, enabling the tri-color phosphor layer of the UV-LED chip module to synthesize white light under ultraviolet or near-ultraviolet light excitation. Since blue light is not directly emitted by the LED chip but generated through photoluminescence of the phosphor, blue light radiation can be greatly reduced, decreasing the emission of blue light components at the source of the lamp. Furthermore, the intensity and wavelength of blue light can be precisely controlled by selecting appropriate phosphor materials and optimizing the composition and ratio of the phosphor to meet different application requirements.

[0029] 2) This invention incorporates a quantum dot UV absorption layer on the surface of the second lampshade of the LED light source. On one hand, the quantum dot absorption layer effectively absorbs the blue light generated by the UV-LED chip module and converts it into light of other wavelengths, significantly reducing blue light radiation and lowering the color temperature of the light source, thus further reducing blue light emission at the source. On the other hand, utilizing the strong absorption capacity of quantum dot materials in the ultraviolet region, while the UV-LED chip module effectively reduces blue light but inevitably emits strong ultraviolet light, the layer can absorb and shield the ultraviolet radiation emitted by the chip module, effectively preventing harm to the human body from ultraviolet radiation. Furthermore, the quantum dot UV absorption layer based on quantum dot materials has a long service life, meeting the needs of long-term use of LED lighting fixtures, extending the lifespan of the fixtures, and significantly improving the light stability performance of the LED fixtures. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the LED lighting device based on weak blue light design according to this utility model.

[0031] Figure 2 This is a schematic diagram of the structure of the LED light source of this utility model;

[0032] Figure 3 This is a schematic diagram of the structure of the lamp holder connection part of this utility model;

[0033] The meanings of the reference numerals in the attached figures are as follows:

[0034] 1. Lamp holder;

[0035] 2. Light poles;

[0036] 3. Lamp holder;

[0037] 4. LED light source;

[0038] 5. UV-LED chip module; 51. Substrate; 52. UV-LED chip;

[0039] 6. Tri-color fluorescent adhesive layer;

[0040] 7. Second lampshade;

[0041] 8. UV absorption layer; 81. UV curing substrate; 82. Carbon-based quantum dots;

[0042] 9. Lamp holder connection part; 91. First connection part; 92. Second connection part; 93. Spring damping component. Detailed Implementation

[0043] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0044] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0046] See Figure 1 As shown, according to an embodiment of this utility model, an LED lighting device designed for low blue light includes a lamp holder 1, a lamp post 2, and a lamp head 3. The upper and lower ends of the lamp post 2 are movably connected to the lamp head 3 and the lamp holder 1, respectively. The lamp head 3 includes a base, a housing, and a first lampshade. The housing, base, and first lampshade form a lamp head cavity, in which an LED light source 4 is disposed. The lamp holder 1 is the bottom support part of the LED lighting device, typically used to fix it to a desktop, ground, or wall, providing stability and support. The two ends of the lamp post 2 connect the lower lamp holder and the upper lamp head, supporting the lamp head and adjusting its height. The lamp head 3 is the core part of the LED lighting device, and the LED light source disposed in its lamp head cavity provides illumination.

[0047] See Figure 2 As shown, the LED light source 4 includes a UV-LED chip module 5 and a tri-color phosphor layer 6. The UV-LED chip module 5 includes a substrate 51 and a UV-LED chip 52. The substrate 51 is fixed to the base of the lamp holder 3, and the UV-LED chip 52 is fixed to the substrate 51. The tri-color phosphor layer 6 covers the surface of the UV-LED chip 52. Specifically, the UV-LED chip 52 emits ultraviolet or near-ultraviolet light. The tri-color phosphor layer 6 emits tri-color light (including blue light) under the excitation of the ultraviolet or near-ultraviolet light emitted by the UV-LED chip 52, and synthesizes white light. Since the blue light of the LED light source 4 is generated by photoluminescence of the phosphor, blue light radiation can be greatly reduced, thereby reducing the emission of blue light components from the source of the lamp. Furthermore, the intensity and wavelength of blue light can be precisely controlled by selecting appropriate phosphor materials and optimizing the composition and ratio of the phosphor to meet different application requirements.

[0048] See Figure 2As shown, the LED light source 4 also includes a second lampshade 7 and a UV absorption layer 8. The second lampshade 7 is fixed to the base of the lamp head 3, and the second lampshade 7 and the base form a light source cavity. The UV-LED chip module 5 is located in the light source cavity. The light generated by the UV-LED chip 52 passes through the second lampshade 7. The UV absorption layer 8 on the surface of the second lampshade 7 can absorb the blue light generated by the UV-LED chip module 5, thereby significantly reducing the amount of blue light radiation. Furthermore, the UV absorption layer 8 on the surface of the second lampshade 7 can also absorb and shield the ultraviolet radiation emitted by the UV-LED chip module 5, effectively preventing the harm of ultraviolet radiation to the human body.

[0049] More specifically, the UV absorption layer 8 comprises at least two layers, and the multiple UV absorption layers 8 are arranged to cover the outer surface of the second lampshade 7 from the inside out. The UV absorption layer 8 contains carbon-based quantum dots 82. On the one hand, the carbon-based quantum dots 82 can effectively absorb the blue light generated by the UV-LED chip 52 and convert it into light of other wavelengths, significantly reducing the amount of blue light radiation and lowering the color temperature of the light source, thereby further reducing the emission of blue light components at the source of the LED lighting device. On the other hand, utilizing the strong absorption capacity of carbon-based quantum dots 82 in the ultraviolet light region, while the UV-LED chip module 5 effectively reduces blue light but inevitably emits strong ultraviolet light, it can absorb and shield the ultraviolet radiation emitted by the UV-LED chip 52, effectively preventing the harm of ultraviolet radiation to the human body. Furthermore, based on the stability of carbon-based quantum dots 82, the LED lighting fixture has a long service life, meeting the needs of long-term use, extending the lifespan of the fixture, and significantly improving the light stability performance of the LED fixture.

[0050] In a preferred embodiment of this utility model, the LED light source 4 further includes a heat sink (not shown in the figure), which is fixed to the base, and the substrate and the heat sink are attached together.

[0051] Optionally, the heat sink can be fixed to the base of the lamp holder 3 by means of screws, clips or clamps, or it can be connected to the base by means of adhesive bonding, welding or integral molding.

[0052] Optionally, the heat sink can be a sheet structure formed by combining thermal grease or thermal pads (made of high thermal conductivity materials, such as aluminum alloy or copper alloy) and thermal grease, with the substrate of the UV-LED chip module and the thermal grease being bonded together.

[0053] In this preferred embodiment, by designing the heat sink and the substrate of the UV-LED chip module to be bonded together, the heat dissipation efficiency of the UV-LED chip module can be significantly improved, and the service life of the LED light source can be extended.

[0054] Example 1

[0055] In one embodiment of this utility model, a technical solution is provided regarding how to specifically manufacture and set the three-primary-color fluorescent adhesive layer.

[0056] 1. Material preparation: Weigh out the red phosphor (Sr2Si5N8:Eu) according to the mass ratio. 3+ 20g, green fluorescent powder (Lu3Al5O) 12 :Ce 3 + 30g, blue fluorescent powder (BaMgAl) 10 O 17 Eu 2+ 10g of silicone resin and 60g of epoxy resin.

[0057] 2. Mixing: Mix the above phosphor with silicone resin and epoxy resin, and add 0.5g of dispersant (optional). Stir for 2 hours to form a uniform fluorescent gel.

[0058] 3. Coating: The fluorescent adhesive obtained in the above steps is applied to the surface of the UV-LED chip 52 with an emission peak wavelength range of 380nm to 400nm by dot coating.

[0059] 4. Curing: The UV-LED chip 52 is cured at 150°C for 40 minutes to form a tri-color fluorescent adhesive layer 6 on the surface of the UV-LED chip.

[0060] Through the preparation process described in the above embodiments, a tri-color phosphor layer 6 can be formed on the surface of the UV-LED chip 52, thereby emitting tri-color light (including blue light) under the excitation of ultraviolet or near-ultraviolet light emitted by the UV-LED chip 52, greatly reducing the blue light radiation of the lamp and realizing the reduction of blue light emission from the source of LED lighting equipment.

[0061] Example 2

[0062] In another embodiment of this utility model, a technical solution is provided regarding how to specifically manufacture and set the UV absorption layer.

[0063] 1. Material preparation: Weigh 5g of carbon-based quantum dots (particle size 5-10nm) and measure 100g of 5% polyvinyl alcohol (or polyurethane) aqueous solution;

[0064] 2. Mixing: Add the above carbon-based quantum dots to the above polyvinyl alcohol (or polyurethane) aqueous solution (which will become UV-cured matrix 71 after molding) and ultrasonically disperse for 30 minutes;

[0065] 3. Coating and drying: A portion of the above solution is coated onto the surface of the encapsulated LED light source (i.e., the outer surface of the second lampshade 7) using a rotary coater at a speed of 2000 rpm to form a 30 μm thick film layer. The film is then dried at 60°C to form the inner UV absorption layer 8.

[0066] 4. Secondary coating and drying: The remaining portion of the above solution is coated onto the surface of the inner UV absorption layer using a rotary coater at a speed of 2000 rpm to form a 50 μm thick film layer. It is then dried again at 60°C to form the outer UV absorption layer 8.

[0067] Through the preparation process described in the above embodiments, a double-layer UV absorption layer 7 containing carbon-based quantum dots 72 can be formed on the surface of the encapsulated LED light source 4 (that is, the outer surface of the second lampshade 7). On the one hand, the UV absorption layer 7 can effectively absorb the blue light generated by the UV-LED chip module 5 and convert it into light of other wavelengths, significantly reducing the amount of blue light radiation. On the other hand, it can also absorb and shield the ultraviolet radiation emitted by the UV-LED chip 52, effectively avoiding the damage of ultraviolet radiation to the human body.

[0068] Furthermore, the dual-layer UV absorption layer 8 effectively enhances the absorption and shielding effect of ultraviolet rays generated by the UV-LED chip module 5, reducing the harm of ultraviolet radiation to the human body. In addition, the dual-layer UV absorption layer 8 design enhances the weather resistance of carbon-based quantum dots 82 under ultraviolet light, reducing material degradation and performance decline caused by ultraviolet radiation.

[0069] Example 3

[0070] See Figure 2 and Figure 3 As shown, in another embodiment of this utility model, a technical solution is provided regarding how to specifically assemble an LED light source and how to assemble an LED lighting device.

[0071] The wavelength of the main emission peak is selected to be between 380nm and 400nm. Chip 52 is fixed to substrate 51 by processes such as die bonding or wire bonding. Subsequently, phosphor is uniformly coated onto the substrate using, for example, the fabrication process described in Example 1. The surface of the chip is then cured to form a tri-color phosphor layer 6 on the surface of the UV-LED chip.

[0072] The second lamp cover of the LED light source is prepared by, for example, the preparation process described in Example 2, through at least two coating processes to form at least two UV absorption layers 8 on the surface of the packaged LED light source 4. The packaged LED light source 4 is then embedded into the lamp head cavity, and thermal grease (i.e., heat sink) is applied to complete the assembly of the lamp head.

[0073] Next, the main structure of the LED lighting equipment is assembled. First, the spring damper 93 is installed between the first connecting part 91 and the second connecting part 92, connected by bolts. The spring compression of the spring damper 93 is adjusted to achieve a preset friction coefficient (e.g., 0.2-0.4). A miniature ball bearing is installed at the end of the first connecting part 91 and connected to the lamp post 2, ensuring lubrication and sealing of the bearing. Then, the first connecting part 91 and the second connecting part 92 are connected by a bushing or bearing seat to form a double-axis rotating structure. Finally, the second connecting part 92 is fixedly connected to the lamp head or lamp holder, completing the assembly of the entire lighting fixture connection.

[0074] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A LED illumination device based on a weak blue light design, characterized in that, The lamp includes a lamp holder, a lamp rod and a lamp head, the upper and lower ends of the lamp rod are movably connected with the lamp head and the lamp holder respectively, the lamp head includes a base, a shell and a first lamp shade, the shell, the base and the first lamp shade form a lamp head cavity, an LED light source is arranged in the lamp head cavity, the LED light source includes: A UV-LED chip module and a three-primary-color fluorescent glue layer, the UV-LED chip module includes a substrate and a UV-LED chip, the substrate is fixed to the base, the UV-LED chip is fixed to the substrate, the three-primary-color fluorescent glue layer is arranged on the surface of the UV-LED chip; A second lamp shade and at least two layers of UV absorption layers, the second lamp shade is fixed to the base, the second lamp shade and the base form a lamp source cavity, the UV-LED chip module is located in the lamp source cavity, the UV absorption layers are arranged on the outer surface of the second lamp shade from inside to outside, and the UV absorption layers contain carbon-based quantum dots.

2. The LED illumination device based on a weak blue light design of claim 1, wherein, The LED light source further includes a heat sink, the heat sink is fixed to the base, and the substrate and the heat sink are arranged in close contact.

3. The weak blue light design based LED lighting apparatus as claimed in claim 1, wherein, The three-primary-color fluorescent glue layer includes red fluorescent powder, green fluorescent powder, blue fluorescent powder and encapsulating resin.

4. The LED illumination device based on a weak blue light design of claim 3, wherein, The red fluorescent powder is Sr2Si5N8:Eu 3+ The green fluorescent powder is Lu3Al5O 12 :Ce 3+ The blue fluorescent powder is BaMgAl 10 O 17 :Eu 2+ The packaging resin comprises silicone resin and epoxy resin.

5. The weak blue light design based LED lighting apparatus as claimed in claim 1, wherein, The UV absorption layer further includes a UV curing matrix, and the carbon-based quantum dots are dispersed in the UV curing matrix.

6. The weak blue light design based LED lighting apparatus as claimed in claim 1, wherein, The number of the UV absorption layers is two, the thickness of the inner layer of the UV absorption layer is 20-40 microns, and the thickness of the outer layer of the UV absorption layer is 40-60 microns.

7. The weak blue light design based LED lighting apparatus as claimed in claim 1, wherein, The emission main peak wavelength range of the UV-LED chip is 340-405 nm.

8. The weak blue light design based LED lighting apparatus as claimed in claim 1, wherein, The color temperature range of the LED light source is 2700K-6500K, and the color coordinates meet the CIE1931 standard, x=0.28-0.45, y=0.25-0.

40.

9. The weak blue light design based LED lighting apparatus as claimed in claim 1, wherein, Lamp connection parts are arranged between the lamp rod and the lamp holder and between the lamp rod and the lamp head, the lamp connection parts include rotatable first and second connection parts, the first connection part is rotatably connected with the lamp rod, and the second connection part is fixedly connected with the lamp holder or the lamp head.

10. The LED illumination device based on a weak blue light design of claim 9, wherein, A spring damping part is further included, the spring damping part is arranged between the first and second connection parts, and the compression degree of the spring damping part is adjustable.

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