Light source module, light distribution structure and lighting device

Abstract

The utility model provides a kind of light source module, including substrate and the light emitting piece of fixedly attached on substrate, light emitting piece includes first light emitting unit and second light emitting unit, the color temperature provided by first light emitting unit and second light emitting unit is 5700K and 6500K respectively, and first light emitting unit and second light emitting unit around constitute rectangular light emitting array;First light emitting unit and second light emitting unit are connected in series, and are powered by single circuit;The light emitted by rectangular light emitting array, after the optical piece with color temperature drift range in-400K~‑650K, to outside, and provide the distribution of light with color temperature range in 5650K‑5750K.The light source module can adapt to optical piece with color temperature drift, provide target light color with color temperature range in 5650K‑5750K after color temperature correction, it is strong in universality, effectively reduce production cost.The utility model further provides the distribution of light structure and lighting device comprising the light source module.

Description

Technical Field

[0001] This utility model belongs to the technical field of LED lighting equipment, specifically relating to a light source module, a light distribution structure, and a lighting device. Background Technology

[0002] In LED lighting equipment such as downlights, spotlights, or ceiling lights, the light emitted by the light-emitting element is controlled by optical devices such as lenses, diffusers, reflectors, and light guides before being emitted to the outside to create the target lighting effect. Due to the variety of materials and manufacturing processes used in these optical devices, light passing through or reflected from them will exhibit varying degrees of color coordinate shift (or color drift). The color drift caused by diffusers or diffuser covers is often the most significant.

[0003] Existing technologies control the luminous flux of light sources through two or more output power supplies, thereby adjusting the color temperature to correct color drift caused by diffusers and achieve the target light color. However, controlling multiple output circuits requires additional components and controllers, which undoubtedly increases development and production costs. Furthermore, multi-channel controlled light sources cannot be well matched to optical devices with different color temperature drift values, resulting in insignificant color temperature correction effects. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a light source module. A first and second light-emitting unit, with color temperatures of 5700K and 6500K respectively, are combined to form a rectangular light-emitting array. This array corrects the color temperature of optical components with a color temperature drift range of -400K to -650K, thereby providing a target light color within the range of 5650K-5750K. It offers strong versatility and effectively reduces production costs. This invention also provides a light distribution structure and illumination device incorporating this light source module.

[0005] The technical effect to be achieved by this utility model is realized through the following technical solution: In a first aspect, the present invention provides a light source module, including a substrate and a light-emitting element attached and fixed to the substrate. The light-emitting element includes a first light-emitting unit and a second light-emitting unit. The color temperatures provided by the first light-emitting unit and the second light-emitting unit are 5700K and 6500K, respectively, and the first light-emitting unit and the second light-emitting unit surround each other to form a rectangular light-emitting array. The first light-emitting unit and the second light-emitting unit are connected in series and powered by a single circuit. The light emitted by the rectangular light-emitting array is emitted to the outside through an optical component with a color temperature drift range of -400K to -650K, and provides a light distribution with a color temperature range of 5650K-5750K.

[0006] In some embodiments, the first light-emitting unit and the second light-emitting unit are distributed in the rectangular light-emitting array along the horizontal axis X and the vertical axis Y; wherein, at least one first light-emitting unit is provided in the horizontal axis X direction of the rectangular light-emitting array.

[0007] In some embodiments, the first light-emitting unit and the second light-emitting unit form a 4*5 rectangular light-emitting array; the first light-emitting unit and the second light-emitting unit are mixed in a ratio of 9:11, 7:13 or 4:16 respectively.

[0008] In some embodiments, when the first light-emitting unit and the second light-emitting unit are mixed in a 9:11 ratio, the rectangular light-emitting array provides light with a color temperature of 6110K, which is emitted to the outside through an optical element with a color temperature drift value of -400K, providing light distribution with a color temperature of 5710K.

[0009] In some embodiments, when the first light-emitting unit and the second light-emitting unit are mixed in a 7:13 ratio, the rectangular light-emitting array provides light with a color temperature of 6210K, which is emitted to the outside through an optical element with a color temperature drift value of -550K, providing light distribution with a color temperature of 5660K.

[0010] In some embodiments, when the first light-emitting unit and the second light-emitting unit are mixed in a 4:16 ratio, the rectangular light-emitting array provides light with a color temperature of 6350K, which is emitted to the outside through an optical element with a color temperature drift value of -650K, providing light distribution with a color temperature of 5700K.

[0011] In some embodiments, the light-emitting element is an SMD patch type light source, and the substrate is one of an aluminum substrate, a fiberglass substrate, or a ceramic substrate; The light source module also includes electrode pads, which are located near the rectangular light-emitting array.

[0012] Secondly, this utility model provides a light distribution structure, including optical components and the aforementioned light source module. The optical components are diffuser plates with planar structures or diffuser covers with arc-shaped structures, and the optical components cover the rectangular light-emitting array.

[0013] In some embodiments, the light distribution structure provides a target light color with a color temperature of 5700K; in the CIE-1931 color space: The color coordinates of the first light-emitting unit are (0.3287, 0.3425). The color coordinates of the second light-emitting unit are (0.3123, 0.3282). The color coordinates of the target light color are (0.3287, 0.3425).

[0014] Thirdly, this utility model provides a lighting device, including a lamp body and the aforementioned light distribution structure; the light source module is disposed at the base of the lamp body, and the optical components are disposed at the light-emitting part of the lamp body.

[0015] In summary, this utility model has at least the following advantages: 1. The light source module provided by this utility model combines a first light-emitting unit with a color temperature of 5700K and a second light-emitting unit with a color temperature of 6500K to form a rectangular light-emitting array. It can correct the color temperature of optical components with a color temperature drift range of -400K to -650K, thereby providing a target light color with a color temperature range of 5650K-5750K. It has strong versatility and effectively reduces production costs.

[0016] 2. The light distribution structure and lighting device provided by this utility model adopt a light source module that forms a rectangular light-emitting array by mixing two light-emitting units in a reasonable proportion. This rectangular light-emitting array specifically corrects the color temperature drift value of the optical components. Moreover, the light source module is powered by a single circuit, which reduces the production process and saves production and inventory management costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the light source module of Embodiment 1 of this utility model.

[0018] Figure 2 This is the spectrum of the first light-emitting unit in Embodiment 1 of this utility model.

[0019] Figure 3 This is the spectrum of the second light-emitting unit in Embodiment 1 of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the first light-emitting unit and the second light-emitting unit mixed in a ratio of 7:13 according to Embodiment 1 of this utility model.

[0021] Figure 5 This is a schematic diagram of the structure of the first light-emitting unit and the second light-emitting unit in a 4:16 ratio according to Embodiment 1 of this utility model.

[0022] Figure 6 This is a schematic diagram of the light output structure of Embodiment 2 of this utility model.

[0023] Figure 7 A schematic diagram of the color coordinates for color temperature correction of the light distribution structure in Embodiment 2 of this utility model.

[0024] Figure 8 This is a schematic diagram of the lighting device according to Embodiment 3 of this utility model. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. 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. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] 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 in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0029] Example 1 Please see Figures 1-5 This embodiment provides a light source module 100, including a light-emitting element 1 and a substrate 21, with the light-emitting element 1 bonded and fixed to the substrate 2. The substrate 2 has a plate-like structure for fixing and connecting the light-emitting element 1. The shape and thickness of the substrate 2 can be flexibly adjusted according to the packaged lamp body and actual application. The substrate 2 can be an aluminum substrate, a fiberglass substrate, or a ceramic substrate. In this embodiment, the substrate 2 is an aluminum substrate. The light-emitting element 1 is an SMD (Surface Mount Device) LED chip, selected according to the illumination range and substrate size, such as 2525, 2835, 3030, 3535, 5050, or 7070 LED chips. In this embodiment, the light-emitting element is preferably an SMD 2835 LED chip with a package size of 2.8×3.5×0.8mm and a power of 1W for a single 3835 LED chip.

[0030] The light-emitting element 1 includes a first light-emitting unit 11 and a second light-emitting unit 12; wherein, the first light-emitting unit 11 is a 2835 LED chip providing a color temperature of 5700K, and the spectrum diagram of the first light-emitting unit 11 can be found in [link to spectrum diagram]. Figure 2 The second light-emitting unit 12 is a 2835 LED chip with a color temperature of 6500K. Please refer to the spectrum diagram of the second light-emitting unit 12. Figure 3 The first light-emitting unit 11 and the second light-emitting unit 12 surround each other to form a rectangular light-emitting array 10, that is, the first light-emitting unit 11 and the second light-emitting unit 12 are distributed on the substrate 11 to form a rectangular light-emitting area.

[0031] It should be noted that in the rectangular light-emitting array 10, the first light-emitting unit 11 and the second light-emitting unit 12 in this embodiment are connected in series and powered by a single circuit. The light source module 100 has electrode pads 3 on the substrate 1, which are located close to the rectangular light-emitting array 10. The electrode pads 3 are used to solder the wires or ports of the external driving power supply output terminal. The electrode pads 3 include a positive electrode pad 31 and a negative electrode pad 32.

[0032] In this embodiment, the rectangular light-emitting array 10 is mixed with two light-emitting units 11 and 12 of two color temperatures to form a light-emitting structure with dual-color mixed monochromatic output. Moreover, it only requires a single power supply to drive it. Compared with the dual-color temperature structure that requires two power supplies to drive it, the power supply driving method is simpler and saves costs.

[0033] The light emitted by the rectangular light-emitting array 10 passes through an optical component with a color temperature shift range of -400K to -650K before being emitted to the outside, providing a light distribution with a color temperature range of 5650K-5750K. The optical component is used to guide, refract, or reflect the light emitted by the light-emitting element. Due to the material and manufacturing process, the light emitted by the light-emitting element will experience different degrees of color shift when passing through the optical component. For example, the final emitted light color temperature is 400K-650K lower than the initial emitted light color temperature. The color temperature shift range of 400K-650K here actually refers to a color temperature range of [(-400K) - (-650K)] that deviates from the target light color of 5700K.

[0034] The light source module 100 in this embodiment combines a first light-emitting unit 11 with a color temperature of 5700K and a second light-emitting unit 12 with a color temperature of 6500K to form a rectangular light-emitting array 10, thereby compensating for or correcting the color temperature drift of optical components in the range of -400K to -650K, and finally providing a target light color in the range of 5650K-5750K. It has strong versatility and effectively reduces production costs.

[0035] In the light source module 100 of this embodiment, the first light-emitting unit 11 and the second light-emitting unit 12 are distributed in the rectangular light-emitting array 10 along the horizontal axis X and the vertical axis Y. Among them, at least one first light-emitting unit 11 is provided in the horizontal axis X direction of the rectangular light-emitting array 10.

[0036] Reference Figure 1 , Figure 4 and Figure 5 The first light-emitting unit 11 and the second light-emitting unit 12 form a 4*5 rectangular light-emitting array 10, that is, the rectangular light-emitting array 10 is arranged with the first light-emitting unit 11 and the second light-emitting unit 12 in a 4-row * 5-column arrangement. Along the horizontal axis X, in each row of the rectangular light-emitting array 10, at least one first light-emitting element 11 with a color temperature of 5700K is provided. Based on this, the first light-emitting element 11 and the second light-emitting element 12 are mixed to obtain the corresponding initial color temperature value, adapt to the optical components that produce color temperature drift, and finally provide light distribution with a color temperature range of 5650K-5750K.

[0037] In this embodiment, the light-emitting element 1 has 20 SMD surface-mount LED chips, forming a 4*5 rectangular light-emitting array 10. The first light-emitting unit 11 and the second light-emitting unit 12 are mixed in a 9:11 ratio. Along the horizontal axis X, the first light-emitting unit 11 and the second light-emitting unit 12 are alternately distributed in each row of the rectangular light-emitting array 10. The first and last light-emitting elements in the first, third, and fourth rows of the rectangular light-emitting array 10 are both second light-emitting units 12; the first and last light-emitting elements in the second row are both first light-emitting units 11. This rectangular light-emitting array 10 provides light with a color temperature of 6110K, which is emitted to the outside through an optical component with a color temperature drift value of -400K, providing a light distribution with a color temperature of 5710K.

[0038] In some embodiments, such as Figure 4 As shown, 20 LED chips form a 4*5 rectangular light-emitting array 10, with the first light-emitting unit 11 and the second light-emitting unit 12 mixed in a 7:13 ratio. Along the horizontal axis X, in the first and fourth rows of the rectangular light-emitting array 10, the first light-emitting unit 11 and the second light-emitting unit 12 are alternately distributed, with both the first and last light-emitting elements being the second light-emitting unit 12. In the second row of the rectangular light-emitting array 10, both the first and last light-emitting elements are the first light-emitting unit 11, with the second light-emitting units 12 positioned between the first light-emitting units 11. In the third row of the rectangular light-emitting array 10, individual first light-emitting units 11 are sandwiched between second light-emitting units 12. This rectangular light-emitting array 10 provides light with a color temperature of 6210K, which is emitted to the outside through an optical component with a color temperature drift value of -550K, providing a light distribution with a color temperature of 5660K.

[0039] In other embodiments, such as Figure 5 As shown, 20 LED chips form a 4*5 rectangular light-emitting array 10, with the first light-emitting unit 11 and the second light-emitting unit 12 mixed in a 4:16 ratio. In each row of the rectangular light-emitting array 10, there is one first light-emitting unit 11, and these units do not overlap in the Y-axis direction. In the second and third rows of the rectangular light-emitting array 10, the first light-emitting units 11 are respectively positioned as the first and last light-emitting elements. In the first row of the rectangular light-emitting array 10, the first light-emitting unit 11 is adjacent to the last light-emitting element; in the fourth row, the first light-emitting unit 11 is adjacent to the first light-emitting element. This rectangular light-emitting array 10 provides light with a color temperature of 6350K, which, after passing through an optical component with a color temperature drift value of -650K, is emitted to the outside, providing a light distribution with a color temperature of 5700K.

[0040] In the rectangular light-emitting array 10, the first light-emitting unit 11 and the second light-emitting unit 12 can also be arranged in other proportions or other ways. In the case of uniform arrangement, it provides emitted light with a color temperature range of 6110K-6350K to adapt to the corresponding optical components with corresponding color temperature drift values.

[0041] The light source module provided in this embodiment combines a first light-emitting unit with a color temperature of 5700K and a second light-emitting unit with a color temperature of 6500K to form a rectangular light-emitting array. It can correct the color temperature of optical components with a color temperature drift range of -400K to -650K, thereby providing a target light color with a color temperature range of 5650K-5750K. It has strong versatility and effectively reduces production costs.

[0042] Example 2 exist Figures 1-5 Based on reference Figure 6 This embodiment provides a light distribution structure 200, including an optical element 3 and a light source module 100. The optical element 3 can be a diffuser plate with a planar structure or a diffuser cover with an arc surface structure. The optical element 3 covers the rectangular light-emitting array 10 and is used to control the light emitted by the rectangular light-emitting array 10. In other embodiments, the optical element 3 can also be a lens, a reflector cup (reflector cup), or a light guide plate.

[0043] In this embodiment, the optical component 3 is a diffuser plate with a planar structure, which covers the rectangular light-emitting array 10. Due to the material or additives, as well as the manufacturing process, the diffuser plate selectively absorbs short-wavelength visible light (blue light). As the proportion of blue light decreases, the overall spectrum of the emitted light shifts towards yellow / red light, ultimately resulting in a lower color temperature. As shown in Table 1, due to the shift in color coordinates, light with a color temperature of 5700K, after passing through the corresponding diffuser plate, results in emitted light with color temperatures of 5320K, 5203K, and 5153K, respectively, deviating from the target color temperature of 5700K.

[0044] Table 1. Color temperature shift of light with a color temperature of 5700K after passing through the diffuser.

[0045] The three types of diffusers described above exhibit varying degrees of color drift and produce different output color temperatures. Therefore, this embodiment adjusts the luminous flux output ratio by optimizing the ratio and arrangement of the first and second light-emitting units in the light source module. This achieves the output of the target light color while maintaining the original light source specifications and without replacing the diffusers. Specifically, for diffusers #1, #2, and #3 in Table 1 that exhibit color temperature drift, a light source module is adapted to use a mixture of the first and second light-emitting units at ratios of 9:11, 7:13, or 4:16, respectively, to compensate for and correct the color temperature. See Table 2 for details on color temperature correction.

[0046] In the CIE-1931 color space: the color coordinates of the first emitting unit with a color temperature of 5700K are (0.3287, 0.3425), and the color coordinates of the second emitting unit with a color temperature of 6500K are (0.3123, 0.3282). The target light color has a color temperature of 5700K and color coordinates of (0.3287, 0.3425).

[0047] Table 2. Color temperature correction for diffuser plates exhibiting color temperature drift.

[0048] Reference Figure 7 According to Table 2, for diffusers with different color temperature drift values, corresponding light source modules are adapted to perform color temperature correction, providing a target light color with a color temperature range of 5650K-5750K, preferably 5700K.

[0049] The light distribution structure provided in this embodiment uses a light source module that mixes two types of first light-emitting units and second light-emitting units in a ratio of 9:11, 7:13 or 4:16 to form a rectangular light-emitting array. This rectangular light-emitting array specifically corrects the color temperature drift value of the optical components.

[0050] Example 3 This embodiment provides a lighting device, including a lamp body 300 and a light distribution structure 200. A light source module 100 is disposed at the base 301 of the lamp body 300, and an optical component 200 is disposed at the light-emitting part 302 of the lamp body 300.

[0051] The lighting device provided in this embodiment uses a light source module that forms a rectangular light-emitting array by mixing two light-emitting units in a reasonable ratio. This rectangular light-emitting array specifically corrects the color temperature drift value of the optical components. Moreover, the light source module is powered by a single circuit, which reduces the number of production process steps and saves production and inventory management costs.

[0052] The above description is merely an example and illustration of the structure of this utility model, and while the description is quite specific and detailed, it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.

Claims

1. A light source module, comprising a substrate and a light-emitting element bonded and fixed to the substrate, characterized in that, The light-emitting element includes a first light-emitting unit and a second light-emitting unit, the first light-emitting unit and the second light-emitting unit provide color temperatures of 5700K and 6500K respectively, and the first light-emitting unit and the second light-emitting unit form a rectangular light-emitting array around each other; The first light-emitting unit and the second light-emitting unit are connected in series and powered by a single circuit. The light emitted by the rectangular light-emitting array is emitted to the outside through an optical component with a color temperature drift range of -400K to -650K, and provides a light distribution with a color temperature range of 5650K-5750K.

2. The light source module according to claim 1, characterized in that, The first light-emitting unit and the second light-emitting unit are dispersedly arranged in the rectangular light-emitting array along the horizontal axis X and the vertical axis Y; wherein, at least one first light-emitting unit is arranged in the horizontal axis X direction of the rectangular light-emitting array.

3. The light source module according to claim 2, characterized in that, The first light-emitting unit and the second light-emitting unit form a 4*5 rectangular light-emitting array; the first light-emitting unit and the second light-emitting unit are mixed in a ratio of 9:11, 7:13 or 4:16 respectively.

4. The light source module according to claim 3, characterized in that, When the first light-emitting unit and the second light-emitting unit are mixed in a ratio of 9:11, the rectangular light-emitting array provides light with a color temperature of 6110K, which is emitted to the outside through an optical component with a color temperature drift value of -400K, providing light distribution with a color temperature of 5710K.

5. The light source module according to claim 3, characterized in that, When the first light-emitting unit and the second light-emitting unit are mixed in a ratio of 7:13, the rectangular light-emitting array provides light with a color temperature of 6210K, which is emitted to the outside through an optical component with a color temperature drift value of -550K, providing light distribution with a color temperature of 5660K.

6. The light source module according to claim 3, characterized in that, When the first light-emitting unit and the second light-emitting unit are mixed in a ratio of 4:16, the rectangular light-emitting array provides light with a color temperature of 6350K. After passing through an optical component with a color temperature drift value of -650K, the light is emitted to the outside, providing a light distribution with a color temperature of 5700K.

7. The light source module according to claim 1, characterized in that, The light-emitting element is an SMD surface-mount type light source, and the substrate is one of an aluminum substrate, a fiberglass substrate, or a ceramic substrate. The light source module also includes electrode pads, which are located near the rectangular light-emitting array.

8. A light distribution structure, characterized in that, Includes optical components and a light source module as described in any one of claims 1-7, wherein the optical components are diffuser plates with planar structures or diffuser covers with arc-shaped structures, and the optical components cover the rectangular light-emitting array.

9. The light distribution structure according to claim 8, characterized in that, The light distribution structure provides a target light color with a color temperature of 5700K; in the CIE-1931 color space: The color coordinates of the first light-emitting unit are (0.3287, 0.3425). The color coordinates of the second light-emitting unit are (0.3123, 0.3282). The color coordinates of the target light color are (0.3287, 0.3425).

10. A lighting device, characterized in that, It includes a lamp body and the light distribution structure as described in claim 8 or 9; the light source module is disposed at the base of the lamp body, and the optical component is disposed at the light emitting part of the lamp body.

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