Color temperature adjustable light source device and lamp

Abstract

The utility model provides a color-temperature-adjustable light source device and a lamp. A containing groove is formed in a support of the color-temperature-adjustable light source device. The first blue light chip and the second blue light chip are arranged on the groove bottom of the accommodating groove at an interval; the first fluorescent structure at least partially 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 is arranged around the first blue light chip; the control unit is used for controlling at least one of the first blue light chip and the second blue light chip to emit light, when the first blue light chip is in a light emitting state, first output light is excited, and when the second blue light chip is in a light emitting state, second output light is excited; wherein the color temperature of the first output light is different from that of the second output light; the first blue light chip and the second blue light chip can work independently and can also work at the same time, so that switching of different color temperatures is achieved, and the lighting quality is improved.

Description

Technical Field

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

[0002] Light-emitting diodes (LEDs) are widely used in the lighting industry due to their high efficiency, energy saving, environmental friendliness, and long lifespan. As a mainstream lighting source, color temperature is a crucial optical parameter for LEDs. Color temperature is a quantitative indicator representing the color attribute of light, measured in Kelvin (K). It reflects the warm or cool tendency of light in terms of color; low color temperatures produce warm yellow light, while high color temperatures produce cool white light. Different color temperatures are suitable for different scene requirements.

[0003] In related technologies, most LED lighting fixtures adopt a single color temperature design, making it difficult to dynamically adapt to needs based on environmental changes, time rhythms, or user behavior. For example, while fixed high color temperature lighting fixtures can improve concentration during work and study, prolonged use can easily cause eye fatigue and disruption of physiological rhythms; while single low color temperature lighting fixtures are suitable for creating a relaxing atmosphere, they cannot meet the concentration requirements of daytime work scenarios. Utility Model Content

[0004] The purpose of this application is to provide an adjustable color temperature light source device and lamp, which aims to solve the problem that the color temperature of lighting products in traditional technology does not meet the needs of users.

[0005] The first aspect of this application provides an adjustable color temperature light source device, comprising:

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

[0007] A first blue light chip is disposed on the bottom of the receiving slot and is used to emit first blue light.

[0008] A first fluorescent structure is at least partially covered on the first blue light chip;

[0009] 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 second blue light.

[0010] A second fluorescent structure is disposed on the second blue light chip and the first fluorescent structure, and the second fluorescent structure is disposed around the first blue light chip;

[0011] The control unit is used to control at least one of the first blue light chip and the second blue light chip to emit light. When the first blue light chip is in the emitting state, the control unit is used to output the first blue light to the first fluorescent structure and the second fluorescent structure to excite the first output light. When the second blue light chip is in the emitting state, the control unit is used to output the second blue light to the second fluorescent structure to excite the second output light.

[0012] The color temperature of the first output light is different from that of the second output light.

[0013] In some embodiments of this application, the control unit has a first control mode, a second control mode, and a third control mode. In the first control mode, the first blue light chip emits light, and the adjustable color temperature light source device outputs the first output light. In the second control mode, the second blue light chip emits light, and the adjustable color temperature light source device outputs the second output light. In the third control mode, both the first blue light chip and the second blue light chip emit light to output the third output light.

[0014] The third output light is formed by mixing the first output light and the second output light, and the color temperature of the third output light is between the color temperature of the first output light and the color temperature of the second output light.

[0015] In some embodiments of this application, the first blue light chip has a first surface disposed away from the bottom of the receiving groove, the first surface having a first region and a second region, the first fluorescent structure covering the first region, and the second fluorescent structure covering the second region.

[0016] In some embodiments of this application, the second region is disposed around the first region.

[0017] In some embodiments of this application, the first blue light chip has a side surface, and the second fluorescent structure also covers the side surface of the first blue light chip; and the first fluorescent structure, the second fluorescent structure, and the bottom of the accommodating groove surround and enclose the first blue light chip.

[0018] In some embodiments of this application, the second fluorescent structure fills the receiving groove.

[0019] In some embodiments of this application, the color temperature of the first output light is higher than the color temperature of the second output light.

[0020] In some embodiments of this application, a first groove and a second groove are provided on the bottom of the receiving groove, and the first groove and the second groove are staggered to divide the bottom of the receiving groove into four receiving areas.

[0021] The adjustable color temperature light source device includes a first positive electrode, a second positive electrode, a first negative electrode, and a second negative electrode. The first positive electrode and the first negative electrode are both electrically connected to the first blue light chip, and the second positive electrode and the second negative electrode are both electrically connected to the second blue light chip. The first positive electrode, the second positive electrode, the first negative electrode, and the second negative electrode are respectively disposed in the four accommodating areas.

[0022] In some embodiments of this application, the first fluorescent structure includes a first colloidal layer and a first phosphor, wherein the first phosphor is dispersed within the first colloidal layer;

[0023] The second fluorescent structure further includes a second colloidal layer and a second phosphor, wherein the second phosphor is dispersed within the second colloidal layer;

[0024] The first phosphor and the second phosphor both include red phosphor and yellow-green phosphor.

[0025] A second aspect of this application also provides a luminaire including the aforementioned adjustable color temperature light source device.

[0026] The beneficial effects of this utility model embodiment compared with the prior art are as follows: In the above-mentioned adjustable color temperature light source device and lamp, the adjustable color temperature light source device includes a bracket, a first blue light chip, a first fluorescent structure, a second blue light chip, a second fluorescent structure, and a control unit; 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 first blue light; the first fluorescent structure at least partially covers the first blue light chip; 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 is used to emit second blue light; the second fluorescent structure covers the second blue light chip and the first fluorescent structure, and the second fluorescent structure is arranged around the first blue light chip; the control unit is used to control the first blue light chip and the second fluorescent structure. At least one of the blue light chips emits light. When the first blue light chip is in an emitting state, it outputs first blue light to a first fluorescent structure and a second fluorescent structure to excite a first output light. When the second blue light chip is in an emitting state, it outputs second blue light to a second fluorescent structure to excite a second output light. The color temperature of the first output light is different from that of the second output light. In other words, the first and second blue light chips in this application can work independently or simultaneously, thereby achieving switching between different color temperatures. This can simulate the color temperature changes of natural light throughout the day and night to suit scenarios such as plant cultivation and pet keeping. It can also enhance concentration with high color temperature light when people are working or studying, and relieve fatigue with low color temperature light when they are resting, which is beneficial to improving lighting quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an adjustable color temperature light source device provided in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the structure of an adjustable color temperature light source device provided in another embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the structure of an adjustable color temperature light source device provided in another embodiment of this application.

[0030] Specific element symbols: 100-support, 110-accommodating groove, 200-first blue light chip, 210-first surface, 211-first region, 212-second region, 220-side, 300-second blue light chip, 400-first fluorescent structure, 500-second fluorescent structure, 600-first positive electrode, 700-second positive electrode, 800-first negative electrode, 900-second negative electrode. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] It's important to understand that in the field of healthy lighting, light color temperature (expressed in Kelvin, K) is a core indicator for measuring the color attributes of light, and its impact on human health and behavior has received widespread attention. Different color temperatures have significantly different application characteristics: warm yellow light below 3300K can create a cozy and relaxing atmosphere, suitable for leisure, reading, and pre-sleep environments; soft, slightly yellow light between 3300K and 5300K is suitable for reading and long hours of work, effectively reducing eye fatigue; while cool white light above 5000K, although it can enhance alertness and attention (such as in classroom lighting), prolonged use can easily lead to eye strain, dry eyes, and other problems. Nighttime use can also suppress melatonin secretion, disrupting sleep rhythms and causing health risks such as decreased sleep quality, anxiety, and poor concentration. Furthermore, while high color temperature light can enhance brain excitability, it may cause fatigue due to prolonged mental exertion, thus reducing work efficiency; low color temperature environments may induce lethargy, affecting daytime work and study motivation.

[0036] Modern lifestyles have further exacerbated the conflict between lighting needs and health. Data shows that modern people spend an average of 86.9% of their time indoors and 5.5% in transportation, significantly reducing their exposure to natural light. This situation easily leads to physiological and mental health problems. Traditional fixed color temperature lighting systems cannot dynamically adapt to the human body's circadian rhythm and the needs of different scenarios. For example, high color temperature light is needed to improve efficiency during the day, while low color temperature light is needed to promote melatonin secretion during nighttime rest. The singular nature of fixed color temperature light sources significantly limits their application in the field of healthy lighting.

[0037] Based on this, this application improves the related adjustable color temperature light source devices and lamps.

[0038] Please see Figure 1 , Figure 1 A schematic diagram of the adjustable color temperature light source device provided in this embodiment is shown. The adjustable color temperature light source device of this embodiment includes a bracket 100, a first blue light chip 200, a first fluorescent structure 400, a second blue light chip 300, a second fluorescent structure 500, and a control unit. 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 is used to emit first blue light; the first fluorescent structure 400 at least partially covers the first blue light chip 200; the second blue light chip 300 is disposed on the bottom of the receiving groove 110 and spaced apart from the first blue light chip 200, and is used to emit second blue light; the second fluorescent structure 500 covers the second blue light chip 300 and the first fluorescent structure 400, and the second fluorescent structure 500... A control unit is arranged around the first blue light chip 200; the control unit is used to control at least one of the first blue light chip 200 and the second blue light chip 300 to emit light, and when the first blue light chip 200 is in the emitting state, it is used to output first blue light to the first fluorescent structure 400 and the second fluorescent structure 500 to excite the first output light; when the second blue light chip 300 is in the emitting state, it is used to output second blue light to the second fluorescent structure 500 to excite the second output light; wherein the color temperature of the first output light is different from the color temperature of the second output light.

[0039] It should be explained that the bracket 100, in the adjustable color temperature light source device, can support other structures. Its receiving groove 110 is used to limit the installation space of the light-emitting chip and the fluorescent structure to ensure heat conduction during the operation of the light source. The first blue light chip 200 and the second blue light chip 300 are the main light-emitting components, both used to output different blue light. They are spaced apart in 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 usually made 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 first blue light chip 200, the second blue light chip 300 and the first fluorescent structure 400. It is mainly used to absorb the light energy of the second blue light chip 300 and excite a spectrum with different color temperatures. It can also be used to absorb the light energy of the first blue light chip 200.

[0040] It is understood that the integrated design of a single support 100 and a single receiving slot 110 in this embodiment avoids the optical barrier of the traditional double-bowl structure and improves the light excitation efficiency. The layered arrangement of the first fluorescent structure 400 and the second fluorescent structure 500 ensures that when the first blue light chip 200 emits light, its surface light excites the first fluorescent structure 400 to produce low color temperature light, and the edge light simultaneously excites the peripheral second fluorescent structure 500 to form mixed light output. When the second blue light chip 300 emits light alone, its light directly excites the second fluorescent structure 500 to produce high color temperature light. There is no physical interruption in the light emission path in both modes, ensuring the uniformity of light mixing. Independent circuit control enables flexible switching of three color temperatures to meet the dynamic requirements of light color temperature in different time periods and scenarios.

[0041] For example, when low color temperature illumination is required, the control unit activates the circuit of the first blue light chip 200, and most of the first blue light emitted by it excites the first fluorescent structure 400 covering the surface, generating warm white light of 2500-3500K. The first blue light leaking out from the edge simultaneously excites the peripheral second fluorescent structure 500, and the two mix to form a uniform low color temperature output. When high color temperature illumination is required, the control unit activates the circuit of the second blue light chip 300, and the second blue light emitted by it excites the second fluorescent structure 500 filling the accommodating groove 110, generating cool white light of 5000-6500K. When medium color temperature illumination is required, the control unit simultaneously activates the dual-chip circuit, and the first blue light and the second blue light excite the corresponding fluorescent structures respectively, mixing to output medium color temperature light of 3500-5000K.

[0042] In some embodiments of this application, the control unit has a first control mode, a second control mode, and a third control mode. In the first control mode, the first blue light chip 200 emits light, and the adjustable color temperature light source device outputs a first output light. In the second control mode, the second blue light chip 300 emits light, and the adjustable color temperature light source device outputs a second output light. In the third control mode, both the first blue light chip 200 and the second blue light chip 300 emit light to output a third output light. The third output light is formed by mixing the first and second output lights, and the color temperature of the third output light is between the color temperature of the first and second output lights.

[0043] Understandably, the control unit has three control modes: a first control mode, a second control mode, and a third control mode. In the first control mode, the control unit only activates the circuitry of the first blue light chip 200, causing it to emit first blue light (peak wavelength 460nm–480nm). This light largely excites the first fluorescent structure 400 (composed of transparent silicone and a mixture of red and yellow-green powder) covering the surface of the first blue light chip 200, producing a low-color-temperature first output light (color temperature range 2500-3500K). In the second control mode, the control unit only activates the circuitry of the second blue light chip 300, causing it to emit second blue light (peak wavelength consistent with the first blue light chip 200). This light excites the second fluorescent structure 500 (also composed of transparent silicone and a mixture of red and yellow-green powder) filling the receiving groove 110. The first blue light is produced by mixing silica gel with red and yellow-green powders, generating a second output light with a high color temperature (color temperature range 5000-6500K). In the third control mode, the control unit simultaneously activates the circuits of the first blue light chip 200 and the second blue light chip 300, which emit first blue light and second blue light respectively. The first blue light excites the first fluorescent structure 400 and the second fluorescent structure 500 to generate the first output light, and the second blue light excites the second fluorescent structure 500 to generate the second output light. The two types of light mix in the receiving groove 110 to form the third output light (color temperature range 3500-5000K), whose color temperature is between that of the first and second output lights.

[0044] In this embodiment, the light emission state of the two chips is controlled by an independent circuit, achieving precise switching and mixing of three color temperatures, thus avoiding the shortcomings of traditional fixed color temperature light sources that cannot adapt to scene requirements. The single-slot integrated structure eliminates optical separation barriers, allowing the edge light of the first blue light chip 200 to directly excite the peripheral second fluorescent structure 500, forming a three-dimensional light mixing path with the light emission of the surface first fluorescent structure 400. Meanwhile, the light from the second blue light chip 300 is uniformly emitted through the unobstructed second fluorescent structure 500, ensuring the uniformity of light color in each mode. In addition, the three color temperatures cover a continuous range from warm light to cool light, which can dynamically simulate the diurnal variation of natural light (such as low color temperature at sunrise, high color temperature at noon, and medium color temperature during transition periods), meeting the needs of rhythmic lighting in scenarios such as indoor lighting and plant cultivation.

[0045] In some embodiments of this application, please refer to Figure 2 , Figure 2 A schematic diagram of the adjustable color temperature light source device provided in this embodiment is shown. The first blue light chip 200 in this embodiment has a first surface 210 disposed away from the bottom of the receiving groove 110. The first surface 210 has a first region 211 and a second region 212. A first fluorescent structure 400 covers the first region 211 and a second fluorescent structure 500 covers the second region 212.

[0046] Understandably, by dividing the surface of the first blue light chip 200 into dual regions covered with different fluorescent structures, a single chip can simultaneously excite two fluorescent materials, further enhancing the diversity of light mixing paths. When the first blue light chip 200 operates alone, its first region 211 and second region 212 generate low color temperature light and high color temperature light components, respectively. The two types of light are pre-mixed within the receiving groove 110, and combined with the surrounding filling of the second fluorescent structure 500, a more uniform low color temperature output or a more flexible color temperature transition effect can be achieved. The dual-region structure improves the spectral adjustment capability when the single chip emits light, providing a more refined optical basis for smooth switching between three color temperatures.

[0047] Please refer to the embodiments described in this application. Figure 2 In this embodiment, the second region 212 is set around the first region 211.

[0048] Understandably, when the first blue light chip 200 operates independently, the blue light from the central first region 211 excites the first fluorescent structure 400 to produce low color temperature light, while the blue light from the outer annular second region 212 directly enters the surrounding second fluorescent structure 500, exciting the production of a high color temperature light component corresponding to the second fluorescent structure 500. The two types of light form a radial mixture within the receiving groove 110 along a path of central warm light + peripheral cool light. Combined with the surrounding filling of the second fluorescent structure 500, this achieves a more uniform low color temperature output or a smoother color temperature transition effect.

[0049] Please refer to the embodiments described in this application. Figure 2 In this embodiment, the first blue light chip 200 has a side 220, and the second fluorescent structure 500 also covers the side 220 of the first blue light chip 200; and the bottom of the first fluorescent structure 400, the second fluorescent structure 500 and the receiving groove 110 surround and cover the first blue light chip 200.

[0050] Understandably, when the first blue light chip 200 emits light, the blue light in its central region is excited by the first fluorescent structure 400 to produce low color temperature light (2500-3500K), while the blue light on the sides 220 and the outer surface is surrounded and excited by the second fluorescent structure 500, producing a high color temperature light component corresponding to the second fluorescent structure 500. Because the second fluorescent structure 500 covers the chip's sides 220, the light emitted by the chip can be fully absorbed and converted by the fluorescent structure in all directions on the surface and sides 220, avoiding the light efficiency loss caused by edge blue light leakage when only the surface is covered, as is the case with traditional methods. Simultaneously, the three-dimensional mixing path of the central low color temperature light + the side 220 / outer high color temperature light allows the light to form a 360° uniform mixture within the receiving groove 110, significantly improving the color temperature uniformity of the first output light. Furthermore, the first fluorescent structure 400, the second fluorescent structure 500, and the bottom of the accommodating groove 110 together form a fully encapsulated structure for the first blue light chip 200, ensuring that the chip is completely embedded in the fluorescent structure and reducing the erosion of the chip by external environmental factors such as moisture and dust.

[0051] Please refer to the embodiments described in this application. Figure 1 In this embodiment, the second fluorescent structure 500 fills the receiving groove 110.

[0052] Understandably, after the second fluorescent structure 500 fills the receiving groove 110, the blue light emitted by the first blue light chip 200 and the second blue light chip 300 can fully contact the fluorescent structure. When the first blue light chip 200 emits light, the blue light leaking from its surface edge and side 220 is captured and excited by the surrounding second fluorescent structure 500, avoiding reflection loss of light in the empty cavity; when the second blue light chip 300 emits light, its light can directly penetrate the fully filled second fluorescent structure 500, which is beneficial to improving light output efficiency.

[0053] Furthermore, the fully volume-filled second fluorescent structure 500 eliminates air gaps or non-optical media within the accommodating slot 110, allowing light excited by different chips (such as the low color temperature component of the first blue light chip 200 and the high color temperature component of the second blue light chip 300) to mix within a unified fluorescent structure medium. The light propagates without interface reflection or scattering interference, resulting in a more consistent mixing path and ensuring uniform color temperature of the output light.

[0054] In some embodiments of this application, the color temperature of the first output light is higher than that of the second output light.

[0055] For example, the color temperature of the first output light is 2500-3500K, the color temperature of the second output light is 5000-6500K, and the color temperature of the third output light is 3500-5000K.

[0056] In some embodiments of this application, please refer to Figure 3 , Figure 3 A schematic diagram of the adjustable color temperature light source device provided in this embodiment is shown. The bottom of the receiving groove 110 in this embodiment is provided with a first groove and a second groove, which are staggered to divide the bottom of the receiving groove 110 into four receiving areas. The adjustable color temperature light source device includes a first positive electrode 600, a second positive electrode 700, a first negative electrode 800, and a second negative electrode 900. The first positive electrode 600 and the first negative electrode 800 are both electrically connected to the first blue light chip 200, and the second positive electrode 700 and the second negative electrode 900 are both electrically connected to the second blue light chip 300. The first positive electrode 600, the second positive electrode 700, the first negative electrode 800, and the second negative electrode 900 are respectively disposed in the four receiving areas.

[0057] It is understood that the staggered first and second trenches in this application separate the electrode systems of the dual chips into independent regions, avoiding the risk of short circuits in the circuits of the first blue light chip 200 and the second blue light chip 300 at the bottom of the trench.

[0058] In some embodiments of this application, the first fluorescent structure 400 includes a first colloidal layer and a first phosphor, with the first phosphor dispersed within the first colloidal layer; the second fluorescent structure 500 further includes a second colloidal layer and a second phosphor, with the second phosphor dispersed within the second colloidal layer; wherein both the first phosphor and the second phosphor include red phosphor and yellow-green phosphor.

[0059] Specifically, the first fluorescent structure 400 consists of a first colloidal layer and a first phosphor. The first colloidal layer is made of transparent silicone, and the first phosphor, including red phosphor and yellow-green phosphor, is uniformly dispersed within the colloidal layer in a mass ratio of 1:2-4. This structure covers the surface of the first blue light chip 200 and is used to generate low color temperature light (2500-3500K) under excitation by first blue light (peak wavelength 460nm-480nm).

[0060] Understandably, a mass ratio of iris to yellow-green phosphor of 1:2-4 is beneficial for ensuring the broadest spectral continuity and color temperature. At the same time, to ensure the fluidity of the first fluorescent structure 400 in the first blue light chip 200, it must be neither too thin to allow it to flow out, nor too dry to prevent it from not flowing and thus not completely covering the chip surface.

[0061] In some embodiments, the ratio of phosphor to adhesive is (1.5-2.5):1, and the viscosity of the fluorescent structure is 4500-5500 mPa·s. The ratio of the amount of the first fluorescent structure 400 (μl) to the chip surface area (mil2, 1mil = 0.0254mm) is 1:(4-8).

[0062] Specifically, the second fluorescent structure 500 consists of a second colloidal layer and a second phosphor. The second colloidal layer is also made of transparent silicone, and the second phosphor is uniformly dispersed within the colloidal layer, containing red phosphor and yellow-green phosphor. This structure covers the second blue light chip 300 and fills the entire receiving groove 110, surrounding the first blue light chip 200. It is used to generate high color temperature light (5000-6500K) under the excitation of the second blue light, or to assist in generating low color temperature light components under the excitation of the edge light of the first blue light.

[0063] In the embodiments of this application, the first blue light chip 200 and the second blue light chip 300 are connected by separate circuit control. When the first circuit is turned on (i.e., the first positive electrode 600 and the first negative electrode 800 are connected), the first blue light chip 200 emits light, with most of the blue light emitted from the chip surface, exciting the first fluorescent structure 400 covering the surface of the first blue light chip 200. The blue light emitted from the edges of the first blue light chip 200 excites the peripheral second fluorescent structure 500. The two lights mix to form white light with a low color temperature (the color temperature can be adjusted by adjusting the composition of the fluorescent structure: 2500-3500K, color rendering index greater than or equal to 98). When the second circuit is turned on (i.e., the second positive electrode 700 and the second negative electrode 900 are connected), the second blue light chip 300 emits light, exciting the second fluorescent structure 500, obtaining white light with a color temperature of 5000-6500K and a color rendering index greater than or equal to 98. When the two circuits are turned on, the first blue light chip 200 and the second blue light chip 300 emit light, which mixes to produce light of 3500-5000K and white light with a color rendering index greater than or equal to 98.

[0064] For example, during the two hours after sunrise (6:00-8:00), only the first circuit can be energized to obtain light of 2500-3500K. In the morning (8:00-10:00) and afternoon (14:00-16:00), both circuits can be energized to obtain light of 3500-5000K. Around noon (10:00-14:00), only the second circuit can be energized to obtain light of 5000-6500K. This method can be used to simulate the color temperature changes of sunlight throughout the day, which is beneficial for plant cultivation, pet care, etc. In human work and study lighting, controlling the second circuit to obtain light of 5000-6500K can ensure concentration. During breaks, controlling the first circuit to obtain light of 2500-3500K can soothe the mind.

[0065] In the embodiments of this application, the method for fabricating the tunable color temperature light source device includes:

[0066] 5g of red phosphor with an excitation wavelength of 640-650nm, 1g of red phosphor with an excitation wavelength of 655-660nm, 14g of yellow-green phosphor with an excitation wavelength of 530-540nm, and 10g of transparent silica gel were obtained and mixed evenly to obtain the first fluorescent structure 400.

[0067] The first fluorescent structure 400 dots were coated on the surface of the first blue light chip 200, the surface size of the first blue light chip 200 was 17mil*34mil, the amount of the first fluorescent structure 400 was 0.07ul, and it was baked and cured at 100℃ for 30min.

[0068] 0.8g of red phosphor with an excitation wavelength of 650-660nm, 5.5g of yellow-green phosphor with an excitation wavelength of 530-540nm, 0.3g of blue-green phosphor with an excitation wavelength of 490-500nm, and 20g of transparent silica gel were mixed evenly to obtain the second fluorescent structure 500.

[0069] The second fluorescent structure 500 dots are placed throughout the entire bowl, covering the second blue light chip 300 and the first fluorescent structure 400, and then baked and cured at 150°C for 120 minutes. When only the first blue light chip 200 emits light, light with a color temperature of 3000K and a color rendering index (CRI) of 98 can be obtained. When only the second blue light chip 300 emits light, light with a color temperature of 5000K and a CRI of 98 can be obtained. When both the first blue light chip 200 and the second blue light chip 300 emit light simultaneously, light with a color temperature of 4200K and a CRI of 98 can be obtained.

[0070] In the embodiments of this application, the method for fabricating the tunable color temperature light source device includes:

[0071] 7g of red phosphor with an excitation wavelength of 650-655nm, 14g of yellow-green phosphor with an excitation wavelength of 520-530nm, and 11g of transparent silica gel were mixed evenly to obtain the first fluorescent structure 400.

[0072] The first fluorescent structure 400 dots were coated on the surface of the first blue light chip 200, the surface size of the first blue light chip 200 was 17mil*34mil, the amount of the first fluorescent structure 400 was 0.07ul, and it was baked and cured at 100℃ for 30min.

[0073] 0.2g of red phosphor with an excitation wavelength of 650-660nm, 4g of yellow-green phosphor with an excitation wavelength of 520-530nm, 0.2g of blue-green phosphor with an excitation wavelength of 490-500nm, and 22g of transparent silica gel were mixed evenly to obtain the second fluorescent structure 500.

[0074] The second fluorescent structure 500 dots are placed throughout the entire bowl, covering the second blue light chip 300 and the first fluorescent structure 400, and then baked and cured at 150°C for 120 minutes. When only the first blue light chip 200 emits light, light with a color temperature of 2500K and a color rendering index (CRI) of 92 can be obtained. When only the second blue light chip 300 emits light, light with a color temperature of 5700K and a CRI of 96 can be obtained. When both the first blue light chip 200 and the second blue light chip 300 emit light simultaneously, light with a color temperature of 4500K and a CRI of 98 can be obtained.

[0075] Furthermore, in order to better implement the adjustable color temperature light source device in any of the above embodiments, based on the above adjustable color temperature light source device, this application embodiment also provides a lamp that includes the above adjustable color temperature light source device.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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. An adjustable color temperature light source device, characterized in that, include: A bracket, wherein a receiving groove is provided on the bracket; A first blue light chip is disposed on the bottom of the receiving slot and is used to emit first blue light. A first fluorescent structure is at least partially covered on the first blue light chip; 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 second blue light. A second fluorescent structure is disposed on the second blue light chip and the first fluorescent structure, and the second fluorescent structure is disposed around the first blue light chip; The control unit is used to control at least one of the first blue light chip and the second blue light chip to emit light. When the first blue light chip is in the emitting state, the control unit is used to output the first blue light to the first fluorescent structure and the second fluorescent structure to excite the first output light. When the second blue light chip is in the emitting state, the control unit is used to output the second blue light to the second fluorescent structure to excite the second output light. The color temperature of the first output light is different from that of the second output light.

2. The adjustable color temperature light source device according to claim 1, characterized in that, The control unit has a first control mode, a second control mode, and a third control mode. In the first control mode, the first blue light chip emits light, and the adjustable color temperature light source device outputs the first output light. In the second control mode, the second blue light chip emits light, and the adjustable color temperature light source device outputs the second output light. In the third control mode, both the first blue light chip and the second blue light chip emit light to output the third output light. The third output light is formed by mixing the first output light and the second output light, and the color temperature of the third output light is between the color temperature of the first output light and the color temperature of the second output light.

3. The adjustable color temperature light source device according to claim 1, characterized in that, The first blue light chip has a first surface disposed away from the bottom of the receiving groove, the first surface having a first region and a second region, the first fluorescent structure covering the first region, and the second fluorescent structure covering the second region.

4. The adjustable color temperature light source device according to claim 3, characterized in that, The second region is set around the first region.

5. The adjustable color temperature light source device according to claim 3, characterized in that, The first blue light chip has a side surface, and the second fluorescent structure also covers the side surface of the first blue light chip; and the first fluorescent structure, the second fluorescent structure and the bottom of the receiving groove surround and enclose the first blue light chip.

6. The adjustable color temperature light source device according to claim 5, characterized in that, The second fluorescent structure fills the accommodating groove.

7. The adjustable color temperature light source device according to any one of claims 1 to 6, characterized in that, The color temperature of the first output light is higher than that of the second output light.

8. The adjustable color temperature light source device according to any one of claims 1 to 6, characterized in that, The bottom of the receiving groove is provided with a first groove and a second groove, which are staggered to divide the bottom of the receiving groove into four receiving areas. The adjustable color temperature light source device includes a first positive electrode, a second positive electrode, a first negative electrode, and a second negative electrode. The first positive electrode and the first negative electrode are both electrically connected to the first blue light chip, and the second positive electrode and the second negative electrode are both electrically connected to the second blue light chip. The first positive electrode, the second positive electrode, the first negative electrode, and the second negative electrode are respectively disposed in the four accommodating areas.

9. The adjustable color temperature light source device according to any one of claims 1 to 6, characterized in that, The first fluorescent structure includes a first colloidal layer and a first phosphor, wherein the first phosphor is dispersed within the first colloidal layer; The second fluorescent structure further includes a second colloidal layer and a second phosphor, wherein the second phosphor is dispersed within the second colloidal layer; The first phosphor and the second phosphor both include red phosphor and yellow-green phosphor.

10. A lamp, characterized in that, Includes the adjustable color temperature light source device as described in any one of claims 1 to 9.

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