Light source device and lamp

Abstract

The utility model provides a light source device and a lamp. A containing groove is formed in a support of the light source device. The first blue light chip is arranged on the groove bottom of the accommodating groove, and the first blue light chip is used for emitting blue light of which the peak wavelength is a; the second blue light chip is arranged on the groove bottom of the containing groove, the second blue light chip and the first blue light chip are arranged in a spaced mode, the second blue light chip is used for emitting blue light with the peak wavelength being b, and b is larger than a; the first fluorescent structure covers the first blue light chip; the second fluorescent structure covers the second blue light chip and the first fluorescent structure, and the second fluorescent structure comprises yellow-green fluorescent powder; according to the invention, a regional excitation structure can be formed, light of different colors can be excited in a targeted manner to complement spectrum deficiency, and the overall color rendering index can be improved; meanwhile, mutual absorption loss between different fluorescent structures is reduced through dual-wavelength hierarchical excitation and physical isolation of the fluorescent structures, and optimization of light extraction efficiency is facilitated.

Description

Technical Field

[0001] This application belongs to the field of lighting technology, and in particular relates to a light source device and a lamp. Background Technology

[0002] Light-emitting diodes (LEDs) are widely used in the lighting field due to their high efficiency, energy saving, environmental friendliness, and long lifespan. With technological advancements, full-spectrum LED technology that simulates the natural spectrum has become a research focus. Its core objective is to make the spectral distribution of visible light closer to sunlight, thereby improving the color rendering index to meet the needs of scenarios such as healthy lighting and high-precision color rendering.

[0003] Currently, the mainstream approach to achieving full-spectrum LEDs is to use two different wavelengths of light source combined with phosphors to excite the spectrum. In traditional packaging processes, the phosphors corresponding to the two light sources are mixed in the same adhesive layer, which easily leads to energy absorption phenomena between different phosphors (such as short-wavelength light being absorbed by long-wavelength phosphors, and long-wavelength light being absorbed by short-wavelength phosphors), resulting in energy waste and thus limiting the improvement of color rendering parameters (such as saturated red R9 and saturated blue R12) and the optimization of luminous efficacy. Utility Model Content

[0004] The purpose of this application is to provide a light source device and lamp that aims to solve the problem of poor luminous efficacy performance of lighting products in traditional technologies.

[0005] The first aspect of this application provides a light source device, comprising:

[0006] A bracket, wherein a receiving groove is provided on the bracket;

[0007] The first blue light chip is disposed on the bottom of the receiving groove and is used to emit blue light with a peak wavelength of a.

[0008] The second blue light chip is disposed on the bottom of the receiving groove and spaced apart from the first blue light chip. The second blue light chip is used to emit blue light with a peak wavelength of b, where b is greater than a.

[0009] A first fluorescent structure is applied to the first blue light chip;

[0010] A second fluorescent structure is coated on the second blue light chip and the first fluorescent structure, and the second fluorescent structure includes a yellow-green phosphor.

[0011] In some embodiments of this application, the light source device further includes:

[0012] A violet light chip is disposed on the bottom of the receiving groove and spaced apart from the first blue light chip and the second blue light chip. The violet light chip is used to emit violet light with a peak wavelength of c, where c is less than b.

[0013] A third fluorescent structure is disposed on the violet chip; the second fluorescent structure is disposed on the third fluorescent structure.

[0014] In some embodiments of this application, the first fluorescent structure and the bottom of the receiving groove together cover the first blue light chip;

[0015] And / or, the third fluorescent structure and the bottom of the accommodating groove surround and enclose the violet chip.

[0016] In some embodiments of this application, the second fluorescent structure fills the receiving groove.

[0017] In some embodiments of this application, the violet light chip is disposed between the first blue light chip and the second blue light chip.

[0018] In some embodiments of this application, the first fluorescent structure includes a first colloidal layer and a red phosphor, wherein the red phosphor is dispersed within the first colloidal layer;

[0019] The second fluorescent structure further includes a second colloidal layer, in which the yellow-green phosphor is dispersed.

[0020] The refractive index of the second colloidal layer is greater than that of the first colloidal layer.

[0021] In some embodiments of this application, the third fluorescent structure includes a third colloidal layer and a blue-green phosphor, wherein the blue-green phosphor is dispersed within the third colloidal layer; the refractive index of the second colloidal layer is greater than the refractive index of the third colloidal layer.

[0022] In some embodiments of this application, the refractive index n1 of the first colloidal layer satisfies the following conditions: n1∈[1.41, 1.43], n2∈[1.54, 1.56], n3∈[1.51, 1.53].

[0023] In some embodiments of this application, a∈[440, 450], b∈[460, 470], c∈[410, 415].

[0024] A second aspect of this application also provides a lighting fixture, including the aforementioned light source device.

[0025] The beneficial effects of this utility model embodiment compared with the prior art are as follows: In the above-mentioned light source device and lamp, the light source device includes a bracket, a first blue light chip, a second blue light chip, a first fluorescent structure, and a second fluorescent structure; a receiving groove is provided on the bracket; the first blue light chip is disposed on the bottom of the receiving groove, and the first blue light chip is used to emit blue light with a peak wavelength of a; the second blue light chip is disposed on the bottom of the receiving groove and is spaced apart from the first blue light chip, and the second blue light chip is used to emit blue light with a peak wavelength of b, where b is greater than a; the first fluorescent structure covers the first blue light chip; the second fluorescent structure covers the second blue light chip and the first fluorescent structure, and the second fluorescent structure includes yellow-green phosphor; in this application, the first blue light chip is covered by the first fluorescent structure, and the second blue light chip and the first fluorescent structure are covered by the second fluorescent structure containing yellow-green phosphor, forming a regional excitation structure, which can selectively excite light of different colors to compensate for spectral deficiencies, which is beneficial to improving the overall color rendering index; at the same time, the mutual absorption loss between different fluorescent structures is reduced by dual-wavelength graded excitation and physical isolation of the fluorescent structure, which is beneficial to optimizing the light extraction efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a light source device provided in an embodiment of this application.

[0027] Specific element symbols: 100-support, 110-accommodation slot, 200-first blue light chip, 300-second blue light chip, 400-first fluorescent structure, 500-second fluorescent structure, 600-violet light chip, 700-third fluorescent structure. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] It should be noted that when a component is referred to as being "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] It's important to understand that light-emitting diodes (LEDs) occupy an increasingly important position in the lighting field due to their significant characteristics such as high efficiency, energy saving, environmental friendliness, and long lifespan. Their applications have expanded from basic indoor and outdoor lighting to professional fields with stringent requirements for spectral quality, such as healthcare, plant growth, and cultural relic preservation. As people's demands for comfortable and functional lighting environments increase, full-spectrum LED technology that simulates the natural spectrum has become a core direction for industry research and development. This technology aims to precisely control the spectral distribution of the visible light band (380-780nm) to closely approximate the proportions of red, green, and blue in sunlight, thereby significantly improving the color rendering index (Ra) and ensuring that special color rendering parameters such as saturated red (R9) and saturated blue (R12) meet healthy lighting standards. This addresses problems such as spectral shift and color distortion inherent in traditional LED light sources.

[0033] Currently, the mainstream technology for full-spectrum LEDs employs two different wavelengths of light (such as short-wavelength and long-wavelength light sources) to co-excite multiple types of phosphors, thus covering the entire spectrum. However, inherent defects in traditional packaging processes severely restrict technological breakthroughs: mixing phosphors corresponding to two types of light sources within the same adhesive layer (such as blue-green phosphors excited by short-wavelength light sources and red phosphors excited by long-wavelength light sources) inevitably leads to cross-band energy absorption—photons emitted by the short-wavelength light source may be captured by the long-wavelength phosphor (e.g., blue-green light is absorbed by red phosphors), while the energy of the long-wavelength light source may also be lost by the short-wavelength phosphor. This energy waste can reduce luminous efficacy by about 5%, and also makes it difficult to overcome industry bottlenecks in key parameters such as R9 and R12. Furthermore, the operating mode of a single light source simultaneously exciting multiple phosphors results in energy dispersion in non-target spectral regions, further exacerbating the insufficient coverage of key bands such as red and blue-green light, making it difficult to meet the stringent requirements for color reproduction in museum artifact lighting and for spectral safety in medical lighting.

[0034] Based on this, this application improves the relevant light source devices and lamps.

[0035] Please see Figure 1 , Figure 1A schematic diagram of the structure of the light source device provided in this embodiment is shown. The light source device of this embodiment includes a bracket 100, a first blue light chip 200, a second blue light chip 300, a first fluorescent structure 400, and a second fluorescent structure 500; a receiving groove 110 is provided on the bracket 100; the first blue light chip 200 is disposed on the bottom of the receiving groove 110, and the first blue light chip 200 is used to emit blue light with a peak wavelength of a; the second blue light chip 300 is disposed on the bottom of the receiving groove 110 and is spaced apart from the first blue light chip 200, and the second blue light chip 300 is used to emit blue light with a peak wavelength of b, where b is greater than a; the first fluorescent structure 400 covers the first blue light chip 200; the second fluorescent structure 500 covers the second blue light chip 300 and the first fluorescent structure 400, and the second fluorescent structure 500 includes a yellow-green phosphor.

[0036] It should be explained that the bracket 100 serves to support other structures within the light source device. Its receiving groove 110 defines the installation space for the light-emitting chip and the fluorescent structure to ensure heat conduction during operation. The first blue light chip 200 and the second blue light chip 300 are the main light-emitting components, emitting blue light with different peak wavelengths. They are spaced apart within the receiving groove 110 (the specific spacing can be adjusted according to the optical design) to avoid direct interference between the light sources. The first fluorescent structure 400 covers the surface of the first blue light chip 200 and is typically composed of a mixture of colloidal material and phosphor. It is used to absorb the light energy of the first blue light chip 200 and excite a specific spectrum. The second fluorescent structure 500 covers the outside of the second blue light chip 300 and the first fluorescent structure 400, and contains yellow-green phosphor. It is used to absorb the light energy of the second blue light chip 300 and supplement another wavelength band of the spectrum.

[0037] Understandably, the short-wavelength blue light (a) emitted by the first blue light chip 200 is absorbed by the phosphor in the first fluorescent structure 400, which can be used to directionally excite the red light spectrum, thus improving the saturated red color rendering index (R9). The long-wavelength blue light (b) emitted by the second blue light chip 300 is absorbed by the yellow-green phosphor in the second fluorescent structure 500, supplementing the yellow-green spectral region, optimizing spectral continuity, and improving the overall color rendering index (Ra). Furthermore, the spaced arrangement of the dual blue light chips and the layered coverage of the fluorescent structures form physically isolated excitation regions, avoiding mutual absorption losses caused by wavelength crossover of different phosphors in the same adhesive layer (such as short-wavelength light being absorbed by long-wavelength phosphors), which is beneficial to improving luminous efficiency.

[0038] Please refer to the embodiments described in this application. Figure 1The light source device in this embodiment also includes a violet light chip 600 and a third fluorescent structure 700; the violet light chip 600 is disposed on the bottom of the receiving groove 110 and is spaced apart from the first blue light chip 200 and the second blue light chip 300. The violet light chip 600 is used to emit violet light with a peak wavelength of c, where c is less than b; the third fluorescent structure 700 covers the violet light chip 600; and the second fluorescent structure 500 covers the third fluorescent structure 700.

[0039] Understandably, the ultraviolet light (peak wavelength c) emitted by the violet chip 600 is absorbed by the blue-green phosphor in the third fluorescent structure 700, exciting a blue-green spectrum of 490-515nm. Combined with the red light (R9) excited by the first blue chip 200 and the yellow-green spectrum excited by the second blue chip 300, the spectral coverage is extended to the entire 380-780nm band, improving the fit with natural light to over 99%, achieving a color rendering index Ra of 99, and increasing R12 to over 98. Furthermore, the violet chip 600 and the dual blue chips form a three-band independent excitation system, with the third fluorescent structure 700 spatially isolated from the first and second fluorescent structures 500 to prevent cross-band phosphor absorption. For example, violet light only excites the blue-green phosphor, short-wavelength blue light (a) only excites the red phosphor, and long-wavelength blue light (b) only excites the yellow-green phosphor, which is beneficial for improving luminous efficiency.

[0040] Please refer to the embodiments described in this application. Figure 1 The bottom of the first fluorescent structure 400 and the accommodating groove 110 are combined to cover the first blue light chip 200.

[0041] It should be explained that the first fluorescent structure 400 covers a portion of the bottom of the accommodating groove 110 and is tightly integrated with the bottom of the groove, together forming a relatively independent space.

[0042] Understandably, the first blue light chip 200 is enclosed by the first fluorescent structure 400 and the bottom of the accommodating groove 110, allowing it to exist in a relatively stable and independent environment. This enables the emitted blue light with a peak wavelength of α to be more effectively absorbed and converted by the first fluorescent structure 400. Because the blue light emitted by the first blue light chip 200 can more effectively excite the phosphor in the first fluorescent structure 400, the generation of the red spectrum becomes more stable and accurate. This helps to improve the saturated red color rendering index R9 of the light source device.

[0043] In some embodiments, please continue reading Figure 1 In this embodiment, the bottom of the third fluorescent structure 700 and the accommodating groove 110 surround and enclose the violet chip 600.

[0044] Understandably, the violet chip 600 is isolated from the outside world by the third fluorescent structure 700 and the bottom of the accommodating groove 110. The ultraviolet light (peak wavelength c) only interacts with the blue-green phosphor within the cavity, avoiding ineffective absorption by other phosphors (such as red phosphor and yellow-green phosphor) due to scattering.

[0045] Please refer to the embodiments described in this application. Figure 1 In this embodiment, the second fluorescent structure 500 fills the receiving groove 110.

[0046] Understandably, the second fluorescent structure 500 can be filled to the top edge of the receiving groove 110 through dispensing or potting processes, forming a complete encapsulation of the entire cavity. After the second fluorescent structure 500 fills the receiving groove 110, it forms a continuous and uniform optical medium, avoiding air gaps (interfaces with abrupt changes in refractive index) caused by incomplete filling of the adhesive layer in traditional encapsulation.

[0047] Please refer to the embodiments described in this application. Figure 1 In this embodiment, the violet light chip 600 is disposed between the first blue light chip 200 and the second blue light chip 300.

[0048] It is understandable that the violet light chip 600, the first blue light chip 200, and the second blue light chip 300 can be arranged linearly (e.g., in a line) or symmetrically distributed in a triangular shape. With the violet light chip 600 centrally positioned, the blue-green phosphor (third fluorescent structure 700) it excites forms a symmetrical spectral superposition region with the first fluorescent structure 400 and the yellow-green phosphor (second fluorescent structure 500) excited by the blue light chips on either side. For example, the 490-515nm blue-green light generated by the violet light can diffuse simultaneously to both sides, uniformly mixing with the spectra on the left and right sides, avoiding the spectral color shift problem caused by unilateral excitation in traditional layouts.

[0049] In some embodiments of this application, the first fluorescent structure includes a first colloidal layer and a red phosphor, with the red phosphor dispersed within the first colloidal layer; the second fluorescent structure further includes a second colloidal layer, with a yellow-green phosphor dispersed within the second colloidal layer; the refractive index of the second colloidal layer is greater than that of the first colloidal layer.

[0050] Understandably, the first colloidal layer and the second colloidal layer form a "low-high" refractive index gradient. When the red light (longer wavelength) excited by the first blue light chip 200 enters the second colloidal layer from the first colloidal layer, according to the law of refraction, the direction of light transmission is closer to the normal direction, reducing reflection loss caused by the abrupt change in refractive index at the interface. The low-refractive-index first colloidal layer has higher transmittance for the short-wavelength blue light (peak wavelength a) of the first blue light chip 200, ensuring the output of short-wavelength blue light, rather than it penetrating into the second colloidal layer and being ineffectively absorbed by the yellow-green phosphor.

[0051] In some embodiments of this application, the third fluorescent structure includes a third colloidal layer and a blue-green phosphor, wherein the blue-green phosphor is dispersed within the third colloidal layer; the refractive index of the second colloidal layer is greater than the refractive index of the third colloidal layer.

[0052] Understandably, the third colloidal layer has a high absorption rate and scattering suppression capability for the ultraviolet light (peak wavelength c) emitted by the violet chip 600. The ultraviolet light is confined within the third colloidal layer and interacts fully with the blue-green phosphor, avoiding leakage to the first colloidal layer (low refractive index) which would lead to ineffective absorption of the red and yellow-green phosphors.

[0053] In some embodiments of this application, the refractive index n1 of the first colloidal layer satisfies the following conditions: n1∈[1.41, 1.43], n2∈[1.54, 1.56], n3∈[1.51, 1.53].

[0054] Understandably, the refractive index of the third colloidal layer is higher than that of the first colloidal layer but lower than that of the second colloidal layer, forming a smooth optical transition and reducing light reflection at the interfaces of different colloidal layers.

[0055] In some embodiments of this application, a∈[440, 450], b∈[460, 470], c∈[410, 415].

[0056] In some embodiments of this application, a first fluorescent structure covers a violet light chip 600 with a peak wavelength of 410nm to 415nm. The first fluorescent structure includes blue-green phosphors and a first transparent adhesive (peak wavelength 490-515nm, such as silicate green phosphor), specifically exciting blue-green light and improving R12 to over 98. The 410nm-415nm violet light chip 600 used in this embodiment can compensate for the violet portion of the spectrum, enhance spectral continuity, and fill the violet light gap in the 380-440nm band. It has a strong excitation effect on blue phosphors, avoiding the decrease in chip luminous efficiency caused by excessively short wavelengths (<410nm) or the decrease in phosphor excitation efficiency caused by excessively long wavelengths (>415nm).

[0057] In some embodiments, the transparent adhesive needs to be made of high-phenyl silica gel (phenyl content > 30%), whose benzene rings in its molecular structure can absorb ultraviolet energy, thus preventing the colloid from yellowing and aging.

[0058] In some embodiments of this application, the second fluorescent structure covers the first blue light chip 200 with a peak wavelength of 440-450nm. The second fluorescent structure includes red powder and a second transparent adhesive, which specifically excites red light and is beneficial to improving R9.

[0059] In some embodiments, the second transparent adhesive is made of low-refractive-index methyl silicone (refractive index 1.41-1.43), which helps to reduce the reflection loss of blue light at the adhesive layer interface (reflectivity <5%), while avoiding the secondary absorption of blue light by red powder (such as nitride red powder SrAlSiN3:Eu2+). In addition, low-refractive-index methyl silicone has stronger heat resistance and can better withstand the heat generated by chip light emission.

[0060] In some embodiments of this application, a third fluorescent adhesive fills the entire bowl and covers a second blue light chip 300 with a peak wavelength of 460-470nm, containing yellow-green phosphors (peak wavelength 535-545nm, such as yttrium aluminum garnet YAG:Ce), which helps to complete the yellow-green spectrum.

[0061] It's important to know that, according to experimental verification, blue light at 460-470nm has a significantly stronger excitation effect on yellow-green phosphors than blue light at 440-450nm. Therefore, red phosphors preferentially absorb blue light at 440-450nm, and finally, blue light at 460-470nm is used to excite the yellow-green phosphors in the bowl.

[0062] In some embodiments, the third transparent adhesive is a high-refractive-index phenyl-modified silicone (refractive index 1.54-1.56). A low-refractive-index adhesive is first used to reduce reflection and refraction, followed by a high-refractive-index adhesive to improve transmittance and resolution. This combined approach can optimize the performance of optical devices, improve work efficiency, and enhance product quality.

[0063] In some embodiments, the violet light chip 600, the first blue light chip 200, and the second blue light chip 300 are connected in series or in parallel.

[0064] In some embodiments of this application, the light source device includes a violet light chip 600, a first blue light chip 200, and a second blue light chip 300; wherein the peak wavelength of the violet light chip 600 is 412nm, the peak wavelength of the first blue light chip 200 is 445nm, and the peak wavelength of the second blue light chip 300 is 465nm.

[0065] The first fluorescent structure uses magnesium silicate green powder (MgSiO3:Eu2+, peak value 505nm, percentage 12%) + high phenyl silica gel (phenyl content 35%, refractive index 1.52).

[0066] The second fluorescent structure uses aluminum nitride strontium red (SrAlSiN3:Eu2). + (Peak peak 650nm, accounting for 18%) + low refractive index methyl silica gel (refractive index 1.42, thermal conductivity 0.35W / m·K).

[0067] The third fluorescent structure uses YAG:Ce yellow-green powder (peak value 540 nm, accounting for 70%) + high refractive index phenyl silica gel (refractive index 1.55, transmittance 96%).

[0068] The preparation process includes: applying a first fluorescent adhesive (60 μm thick) and heat curing (100℃, 0.5 h); applying a second fluorescent adhesive (50 μm thick) and heat curing (100℃, 0.5 h); filling a bowl with a third fluorescent adhesive and heat curing (150℃, 2 h).

[0069] Furthermore, in order to better implement the light source device in any of the above embodiments, this application also provides a lamp that includes the above-described light source device.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0071] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0072] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0073] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the utility model, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0074] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A light source device, characterized in that, include: A bracket, wherein a receiving groove is provided on the bracket; The first blue light chip is disposed on the bottom of the receiving groove and is used to emit blue light with a peak wavelength of a. The second blue light chip is disposed on the bottom of the receiving groove and spaced apart from the first blue light chip. The second blue light chip is used to emit blue light with a peak wavelength of b, where b is greater than a. A first fluorescent structure is applied to the first blue light chip; A second fluorescent structure is coated on the second blue light chip and the first fluorescent structure, and the second fluorescent structure includes a yellow-green phosphor.

2. The light source device according to claim 1, characterized in that, The light source device also includes: A violet light chip is disposed on the bottom of the receiving groove and spaced apart from the first blue light chip and the second blue light chip. The violet light chip is used to emit violet light with a peak wavelength of c, where c is less than b. A third fluorescent structure is disposed on the violet chip; the second fluorescent structure is disposed on the third fluorescent structure.

3. The light source device according to claim 2, characterized in that, The first fluorescent structure and the bottom of the accommodating groove together cover the first blue light chip; And / or, the third fluorescent structure and the bottom of the accommodating groove surround and enclose the violet chip.

4. The light source device according to claim 3, characterized in that, The second fluorescent structure fills the accommodating groove.

5. The light source device according to claim 2, characterized in that, The violet light chip is disposed between the first blue light chip and the second blue light chip.

6. The light source device according to claim 2, characterized in that, The first fluorescent structure includes a first colloidal layer and a red phosphor, wherein the red phosphor is dispersed within the first colloidal layer; The second fluorescent structure further includes a second colloidal layer, in which the yellow-green phosphor is dispersed. The refractive index of the second colloidal layer is greater than that of the first colloidal layer.

7. The light source device according to claim 6, characterized in that, The third fluorescent structure includes a third colloidal layer and a blue-green phosphor, wherein the blue-green phosphor is dispersed within the third colloidal layer; the refractive index of the second colloidal layer is greater than the refractive index of the third colloidal layer.

8. The light source device according to claim 7, characterized in that, The refractive index n1 of the first colloidal layer satisfies the following conditions: n1∈[1.41, 1.43], n2∈[1.54, 1.56], n3∈[1.51, 1.53].

9. The light source device according to claim 7, characterized in that, a∈[440, 450], b∈[460, 470], c∈[410, 415].

10. A lamp, characterized in that, Includes the light source device according to any one of claims 1 to 9.

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