LED white light source

Abstract

An LED white light source, comprising red-light LED lamp beads (11), green-light LED lamp beads (12), blue-light LED lamp beads (13) and white-light LED lamp beads (14), which are controlled independently of each other, wherein when the green-light LED lamp beads (12) are green-light chips, the ratio of the luminous fluxes of the red-light LED lamp beads (11), the green-light LED lamp beads (12), the blue-light LED lamp beads (13) and the white-light LED lamp beads (14) is 1.8-2.0:5.5-5.6:1:15-16; alternatively, when each green-light LED lamp bead (12) comprises a first light-emitting chip and a first phosphor that covers the first light-emitting chip, the ratio of the luminous fluxes of the red-light LED lamp beads (11), the green-light LED lamp beads (12), the blue-light LED lamp beads (13) and the white-light LED lamp beads (14) is 1.8-2.0:12-13:1:14-15. Upon testing, the white light source has high power consistency at different color temperatures, such that the technical problem of the light emission efficiency of existing LED white light sources needing to be improved is solved, thereby facilitating energy efficiency optimization.

Description

LED white light source

[0001] The present application claims priority to Chinese Patent Application No. 202421487389.2, filed on June 26, 2024, to Chinese Patent Application No. 202411183203.9, filed on August 27, 2024, the contents of both of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the field of lighting technology, in particular to a LED white light source. BACKGROUND

[0003] LED white light sources are widely used in household lighting, commercial lighting, stage lighting, film and television shooting, theater studio lighting, museum lighting, medical lighting, and plant growth lighting, etc. With the increasing emphasis on the comfort of the lighting environment and the display effect of white light, the color temperature range and power stability of LED white light sources are increasingly required.

[0004] LED white light sources include multiple color light beads, and the light colors of each color light bead are different. The white light emitted by the LED white light source is composed of multiple color lights, and the combination of different luminous fluxes of multiple color light beads leads to a big difference in the final luminous efficiency in order to meet the color temperature range of white light. The existing luminous flux combination of white light has the technical problem that the luminous efficiency needs to be improved. SUMMARY

[0005] The purpose of the present application is to provide a LED white light source, which aims to solve the technical problem that the existing LED white light source has a luminous efficiency to be improved.

[0006] The present application provides a LED white light source, which includes red light LED light beads, green light LED light beads, blue light LED light beads and white light LED light beads controlled independently of each other.

[0007] When the green light LED light beads are green light chips, the ratio of the luminous fluxes of the red light LED light beads, the green light LED light beads, the blue light LED light beads and the white light LED light beads is 1.8-2.0:5.5-5.6:1:15-16.

[0008] Alternatively, when the green light LED light beads include first light emitting chips and first phosphor covering the first light emitting chips, the ratio of the luminous fluxes of the red light LED light beads, the green light LED light beads, the blue light LED light beads and the white light LED light beads is 1.8-2.0:12-13:1:14-15.

[0009] In one of the embodiments, the red LED lamp bead comprises a second light emitting chip and a second phosphor covering the second light emitting chip, and the peak wavelength of the second phosphor is between 635 nm and 660 nm.

[0010] In one of the embodiments, the white LED lamp bead comprises a third light emitting chip and a third phosphor covering the third light emitting chip, and the peak wavelength of the third phosphor is between 580 nm and 620 nm.

[0011] In one of the embodiments, the third light emitting chip is the same as the second light emitting chip; and / or, the third phosphor comprises at least one of green phosphor, orange phosphor and red phosphor.

[0012] In one of the embodiments, the color temperature of the light emitted by the white LED lamp bead ranges from 2850 K to 3250 K; and / or, the Duv of the light emitted by the white LED lamp bead ranges from +0.005 to +0.015.

[0013] In one of the embodiments, the blue LED lamp bead comprises a first lamp bead, a second lamp bead and a third lamp bead, the peak wavelength of the first lamp bead is between 400 nm and 410 nm, the peak wavelength of the second lamp bead is between 445 nm and 455 nm, and the peak wavelength of the third lamp bead is between 455 nm and 465 nm.

[0014] In one of the embodiments, the power ratio of the first lamp bead, the second lamp bead and the third lamp bead is 4:5:3; and / or, the peak wavelength of the first lamp bead is 407 nm, the peak wavelength of the second lamp bead is 452 nm, and the peak wavelength of the third lamp bead is 460 nm.

[0015] In one of the embodiments, the main peak wavelength of the light emitted by the blue LED lamp bead is between 445 nm and 465 nm.

[0016] In one of the embodiments, the spectrum of the blue LED lamp bead further comprises a secondary peak with a wavelength between 400 nm and 420 nm.

[0017] In one of the embodiments, when the green LED lamp bead is the green light chip, the light intensity of the secondary peak of the blue LED lamp bead is less than 65% of the light intensity of the peak wavelength of the blue LED lamp bead.

[0018] In one of the embodiments, when the green LED lamp bead comprises the first light emitting chip and the first phosphor, the light intensity of the secondary peak of the blue LED lamp bead is 90% to 100% of the light intensity of the peak wavelength of the blue LED lamp bead.

[0019] In one of the embodiments, the peak wavelength of the green LED lamp bead is between 510nm and 530nm.

[0020] In one of the embodiments, the LED white light source further comprises a first substrate having a light emitting surface, and the red LED lamp bead, the green LED lamp bead, the blue LED lamp bead and the white LED lamp bead are all light emitting lamp beads, and the light emitting lamp beads are arranged on the light emitting surface.

[0021] In one of the embodiments, the light emitting lamp beads are arranged in a matrix, and in the two adjacent rows of light emitting lamp beads, one row is arranged with two of the red LED lamp bead, the green LED lamp bead, the blue LED lamp bead and the white LED lamp bead, and the other row is arranged with the other two of the red LED lamp bead, the green LED lamp bead, the blue LED lamp bead and the white LED lamp bead.

[0022] In one of the embodiments, the light emitting surface is circular, the light emitting lamp beads are arranged on the light emitting surface, and the light emitting lamp beads arranged along the circumferential direction of the light emitting surface include the red LED lamp bead, the green LED lamp bead, the blue LED lamp bead and the white LED lamp bead, and in the four light emitting lamp beads arranged along the circumferential direction, at least three of the light emitting lamp beads are different.

[0023] The LED white light source provided by the present application has the following advantages: the red LED lamp bead, the green LED lamp bead, the blue LED lamp bead and the white LED lamp bead are independently controlled to emit light, mixed light forms white light with adjustable color temperature, and the white light is adjusted in the color temperature range of 2000K-20000K; compared with the white light synthesized by three colors, the white light synthesized by four colors has a larger color gamut range on the chromaticity diagram, and the coordinate points are more flexible, accurate and adjustable, and are basically consistent or completely consistent with natural white light; compared with the white light synthesized by five colors or more than five colors, the white light source has fewer lamp bead colors and driving lines, and is beneficial to miniaturization and light weight; when the green LED lamp bead is a green chip, the ratio of the luminous fluxes of the red LED lamp bead, the green LED lamp bead, the blue LED lamp bead and the white LED lamp bead is 1.8-2.0:5.5-5.6:1:15-16; when the green LED lamp bead comprises a first light emitting chip and a first phosphor, the ratio of the luminous fluxes of the red LED lamp bead, the green LED lamp bead, the blue LED lamp bead and the white LED lamp bead is 1.8-2.0:12-13:1:14-15; through tests, the white light source has high power consistency and high luminous efficiency at different color temperatures, solves the technical problem that the luminous efficiency of the existing LED white light source needs to be improved, and is beneficial to energy efficiency optimization. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] Fig. 1 is a structural schematic diagram of an LED white light source provided by an embodiment of the present application;

[0026] Fig. 2 is another structural schematic diagram of an LED white light source provided by an embodiment of the present application;

[0027] Fig. 3 is a first spectral combination diagram of an LED white light source provided by an embodiment of the present application;

[0028] Fig. 4 is a second spectral combination diagram of an LED white light source provided by an embodiment of the present application;

[0029] Fig. 5 is a light quality parameter diagram of an LED white light source provided by an embodiment of the present application;

[0030] Fig. 6 is a light quality parameter diagram in the related art;

[0031] Fig. 7 is a circuit schematic diagram of an LED white light source provided by an embodiment of the present application.

[0032] In the drawings, the reference signs are as follows: 1, light emitting surface; 11, red light LED lamp bead; 12, green light LED lamp bead; 13, blue light LED lamp bead; 131, first lamp bead; 132, second lamp bead; 133, third lamp bead; 14, white light LED lamp bead; 2, first substrate; 3, second substrate; 31, thermistor; 32, wiring socket; 4, control unit; 41, first driving circuit; 42, second driving circuit; 43, third driving circuit; 44, fourth driving circuit. DETAILED DESCRIPTION

[0033] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0034] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, the appearances of the phrase "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0035] In the description of the application, it is to be understood that the orientations or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are for the purpose of facilitating the description of the application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0036] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0037] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connection", "connecting", "fixed", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In combination with FIG. 1 and FIG. 2, the present application provides a LED white light source. The LED white light source includes red LED lamp beads 11, green LED lamp beads 12, blue LED lamp beads 13 and white LED lamp beads 14 which are independently controlled. The red LED lamp beads 11, green LED lamp beads 12, blue LED lamp beads 13 and white LED lamp beads 14 are independently controlled to emit light, and mixed light forms white light with adjustable color temperature, realizing dimming of white light in a color temperature range of 2000K-20000K. Compared with white light synthesized by three colors, white light synthesized by four colors has a larger color gamut range on a chromaticity diagram, and its coordinate points are more flexible, accurate and adjustable, and are basically consistent or completely consistent with natural white light; compared with white light synthesized by five colors or more than five colors, the LED lamp beads have fewer color types and driving lines, which is beneficial to miniaturization and light weight of the white light source.

[0039] In some embodiments, when the green LED lamp bead 12 is a green chip, the ratio of the luminous flux of the red LED lamp bead 11, the green LED lamp bead 12, the blue LED lamp bead 13 and the white LED lamp bead 14 is 1.8-2.0:5.5-5.6:1:15-16. Based on this, the brightness of the white LED lamp bead 14 is the highest, ensuring the brightness and white light output effect of the overall light source. The green LED lamp bead 12 has relatively high brightness, highlighting the color rendering effect of green, and the brightness of the red LED lamp bead 11 and the blue LED lamp bead 13 is lower, balancing the overall light effect.

[0040] In other embodiments, when the green LED lamp bead 12 includes a first light emitting chip and a first phosphor covering the first light emitting chip, the ratio of the luminous flux of the red LED lamp bead 11, the green LED lamp bead 12, the blue LED lamp bead 13 and the white LED lamp bead 14 is 1.8-2.0:12-13:1:14-15. Compared with the green LED lamp bead 12 directly emitting light as a green chip, the green LED lamp bead 12 in this embodiment emits green light by exciting the first phosphor layer with the first light emitting chip. The green LED lamp bead 12 used has relatively high brightness because if the brightness of the first light emitting chip is insufficient, the amount of light absorbed by the first phosphor will not be sufficient to produce sufficient re-emitted light. Therefore, in order to ensure that the first phosphor layer can effectively absorb and re-emit light, the green LED lamp bead 12 needs to use a first light emitting chip with relatively high luminous flux to provide stable and efficient light output. As a result, such a luminous flux ratio setting can improve the overall light efficiency of the light source, reduce energy consumption while providing high-quality lighting.

[0041] Through testing, in the above two luminous flux ratios, the LED white light source has high power consistency at different color temperatures, high luminous efficiency, and is conducive to energy efficiency optimization, and can also improve the stability and reliability of the product. As a result, such a luminous flux ratio setting can improve the color rendering index CRI of the light source, making the color of the illuminated object more true and natural. Especially in a white light environment, different colored LED lamp beads work together to produce high-quality white light.

[0042] Among them, the required luminous flux ratio can be achieved by selecting lamp beads with different brightness and power characteristics. Specifically, lamp beads with different light output (luminous flux) can be selected to achieve the required luminous flux ratio directly through the luminous flux difference of the lamp beads themselves. Or select lamp beads with different power, because lamp beads with different power will produce different brightness under the same current, so the required luminous flux ratio can be achieved.

[0043] In some embodiments, the first light emitting chip is a blue light chip, and the first phosphor is a green light phosphor. The blue light chip has high light emitting efficiency, and the combination of the green light phosphor can achieve high luminous flux output and improve the illumination efficiency.

[0044] In FIGS. 3 and 4, the arrow B points to the spectrum curve of the blue light LED lamp bead 13, the arrow G points to the spectrum curve of the green light LED lamp bead 12, the arrow W points to the spectrum curve of the white light LED lamp bead 14, and the arrow R points to the spectrum curve of the red light LED lamp bead 11.

[0045] In some embodiments, in combination with FIGS. 1, 3 and 4, although the spectrum shapes of the green light LED lamp bead 12 in FIGS. 3 and 4 are different, the peak wavelengths of the green light LED lamp bead 12 are all between 510 nm and 530 nm, so that the generated green light is more pure and the color is more saturated. The stable peak wavelength of the green light LED lamp bead 12 in this range helps to ensure that the green light LED lamp beads 12 under different batches and different production conditions remain highly consistent in color.

[0046] Specifically, when the green light LED lamp bead 12 is a green light chip, the spectrum of the green light LED lamp bead 12 includes a first wave band with a wavelength less than 505 nm and a wavelength greater than 535 nm, and the light intensity of the first wave band is less than or equal to 60% of the light intensity of the peak wavelength of the green light LED lamp bead 12, so as to quickly reduce the light intensity of the non-peak wavelength and reduce the stray light.

[0047] Specifically, when the green light LED lamp bead 12 includes a first light emitting chip and a first phosphor, the spectrum of the green light LED lamp bead 12 includes a second wave band with a wavelength less than 492 nm and a wavelength greater than 585 nm, and the light intensity of the second wave band is less than or equal to 60% of the light intensity of the peak wavelength of the green light LED lamp bead 12, so as to widen the spectrum intensity of the green light LED lamp bead 12, so that the green light has a high color rendering index and TLCI index.

[0048] In some embodiments, in combination with FIGS. 1, 3 and 4, the red light LED lamp bead 11 includes a second light emitting chip and a second phosphor covering the second light emitting chip, and the peak wavelength of the second phosphor is between 635 nm and 660 nm. The stable peak wavelength of the second phosphor in this range helps to ensure that the red light LED lamp beads 11 under different batches and different production conditions remain highly consistent in color.

[0049] Optionally, the second light emitting chip is a blue light chip, which has high light emitting efficiency and can achieve high luminous flux output and improve the illumination efficiency.

[0050] In one embodiment, in combination with FIG. 1, FIG. 3 and FIG. 4, when the green LED lamp bead 12 is a green chip, the spectral bandwidth of the green LED lamp bead 12 is narrow, the spectrum of the red LED lamp bead 11 includes a third wave band with a wavelength less than 630 nm and a wavelength greater than 678 nm, and the light intensity (see the ordinate of FIG. 3) of the third wave band is less than or equal to 80% of the light intensity of the peak wavelength of the red LED lamp bead 11, thereby limiting the light intensity of the non-peak wavelength of the red light, optimizing the spectral distribution, reducing stray light, and making the light more pure and the color more saturated, which is conducive to improving the TLCI index on the one hand and concentrating energy on the peak wavelength and reducing energy loss on the other hand.

[0051] In other embodiments, in combination with FIG. 1, FIG. 3 and FIG. 4, when the green LED lamp bead 12 includes a first light-emitting chip and a first phosphor, the spectral bandwidth of the green LED lamp bead 12 is wide, the spectrum of the red LED lamp bead 11 includes a fourth wave band with a wavelength less than 621 nm and a wavelength greater than 663 nm, and the light intensity (see the ordinate of FIG. 4) of the fourth wave band is less than or equal to 80% of the light intensity of the peak wavelength of the red LED lamp bead 11, thereby limiting the light intensity of the non-peak wavelength of the red light, widening the red light wave band, balancing the wide bandwidth spectrum of the green light, and making the synthesized white light closer to natural white light.

[0052] In some embodiments, in combination with FIG. 1, FIG. 3 and FIG. 4, the white LED lamp bead 14 includes a third light-emitting chip and a third phosphor covering the third light-emitting chip, and the peak wavelength of the third phosphor is between 580 nm and 620 nm. The peak wavelength of the third phosphor is stable within this range, which helps to ensure that the white LED lamp beads 14 under different batches and different production conditions remain highly consistent in color, meeting the requirements of high-end applications for TLCI.

[0053] Optionally, in combination with FIG. 3 and FIG. 4, the light intensity of the white LED lamp bead 14 at a wavelength of 550 nm to 650 nm is greater than or equal to 60% of the light intensity of the peak wavelength of the white LED lamp bead 14, thereby widening the light intensity of the red light and the cyan light in the white light and being conducive to improving the TLCI index of the synthesized white light.

[0054] Optionally, the third light-emitting chip is a blue chip, which has a high light-emitting efficiency and can achieve a high luminous flux output, thereby improving the lighting efficiency.

[0055] Optionally, the third light-emitting chip is the same as the second light-emitting chip, thereby reducing the types of materials.

[0056] Optionally, the third phosphor includes green phosphor, orange phosphor and red phosphor. In this way, by adjusting the composition and proportion of the third phosphor, the color temperature range of the output light of the white LED lamp bead 14 can be controlled, a greater Duv range can be achieved, and the color rendering index can be enhanced.

[0057] In some embodiments, the color temperature of the light emitted by the white light LED lamp bead 14 ranges from 2850K to 3250K. The problem of low CRI and TLCI index within the color temperature range of 2850K to 3250K can be avoided due to the mixed light of multiple single light LED lamp beads.

[0058] In some embodiments, the Duv value represents the color difference between the color of the light source and the color of the black body radiation at the same color temperature. The Duv of the light emitted by the white light LED lamp bead 14 ranges from +0.005 to +0.015, which ensures that the light emitted by the white light LED lamp bead 14 has high stability and can reduce the color difference problem caused by color temperature fluctuation, so that the power is basically the same within the color temperature range. If the Duv is lower than +0.005, the light power within the color temperature range of 2850K to 3250K will be too high; if the Duv is higher than +0.015, the light power of the color temperature above 3250K will be too high.

[0059] In some embodiments, in combination with FIGS. 1, 3 and 4, the light emitted by the blue light LED lamp bead 13 also includes a secondary peak value with a wavelength of 400nm to 420nm, which realizes wider spectral coverage and makes the mixed white light closer to the spectral characteristics of natural light, so as to improve the color rendering index and TLCI index.

[0060] In one of the embodiments, when the green light LED lamp bead 12 is a green light chip, the green light energy generated by the green light chip is concentrated and the spectral bandwidth is narrow. The light intensity of the secondary peak value of the blue light LED lamp bead 13 is less than 65% of the light intensity of the peak wavelength emitted by the blue light LED lamp bead 13, which can balance the narrow bandwidth spectrum of green light and maintain the improvement of the color rendering index and color reproduction ability of the white light source.

[0061] In another embodiment, the green light LED lamp bead 12 includes a first light emitting chip and a first phosphor. The green light spectrum generated by the green light LED lamp bead 12 is wide, and the light intensity of the secondary peak value of the blue light LED lamp bead 13 is 90% to 100% of the light intensity of the peak wavelength emitted by the blue light LED lamp bead 13, which can balance the wide bandwidth spectrum of green light and maintain the improvement of the color rendering index and color reproduction ability of the white light source.

[0062] In this embodiment, the blue light LED lamp bead 13 can be composed of one or more color lamp beads, that is, the blue light LED lamp bead 13 can be composed of at least one color lamp bead of multiple different waveband spectra of blue light, purple light and ultraviolet light in proportion. The at least one color lamp bead can be connected in series or in parallel, and the same driving circuit is adopted.

[0063] In some embodiments, in combination with FIG. 7, the blue light LED lamp bead 13 includes a first lamp bead 131, a second lamp bead 132, and a third lamp bead 133, the peak wavelength of the first lamp bead 131 is 400nm-410nm, the peak wavelength of the second lamp bead 132 is 445nm-455nm, and the peak wavelength of the third lamp bead 133 is 455nm-465nm.

[0064] Based on this, the blue light LED lamp bead 13 can achieve wider spectral coverage by using three different peak wavelength blue light beads, thereby significantly improving the spectral similarity index (SSI) index. For example, when the target color temperature is 3200K, the SSI reaches above 90. The combination of different peak wavelengths makes the spectral distribution of the blue light LED lamp bead 13 closer to natural light, providing a more realistic and natural lighting environment for photography lighting and other applications, making the photography works have more realistic color restoration and higher detail performance. At the same time, the spectral distribution closer to natural light can reduce eye fatigue and discomfort, and improve people's visual comfort.

[0065] In one of the embodiments, by adjusting the power ratio of different wavelength lamp beads, the spectral shape and intensity distribution of the blue light LED lamp bead 13 can be adjusted. The power ratio of the first lamp bead 131, the second lamp bead 132 and the third lamp bead 133 is 4:5:3. The second lamp bead 132 provides blue light closer to pure blue, and its ratio is larger, which is beneficial to realize a larger color temperature and expand the color temperature range. This power ratio range is beneficial to flexibly adjust the color temperature, brightness and spectral distribution of the blue light LED lamp bead 13, and is beneficial to the spectral coverage of the white light source to be more extensive, while maintaining the spectral characteristics similar to natural light, thereby improving the spectral similarity index of the white light source, optimizing the color rendering of the light source, and enhancing the visual comfort of natural light.

[0066] In this embodiment, the main peak wavelength of the light emitted by the blue light LED lamp bead 13 is between 445nm-465nm. Blue light with shorter wavelength (close to 445nm) is suitable for high brightness and high contrast application scenarios, while blue light with longer wavelength (close to 465nm) is suitable for soft light application scenarios. For example, when the blue light LED lamp bead 13 includes the first lamp bead 131, the second lamp bead 132 and the third lamp bead 133, the first lamp bead 131, the second lamp bead 132 and the third lamp bead 133 are arranged in series, realizing the peak wavelength of the blue light LED lamp bead 13 is 400nm-465nm.

[0067] In one embodiment, the first lamp bead 131 has a peak wavelength of 407 nm, the second lamp bead 132 has a peak wavelength of 452 nm, and the third lamp bead 133 has a peak wavelength of 460 nm. Since the wavelength of 452 nm is closer to the center of pure blue, the peak wavelength of the second lamp bead 132 is selected, and the first lamp bead 131 and the third lamp bead 133 are selected to have shorter wavelengths (407 nm) and longer wavelengths (460 nm), respectively, so that the spectral distribution of the entire blue LED lamp bead 13 is more extensive and uniform.

[0068] It can be understood that, in one embodiment, the blue LED lamp bead 13 only selects one of the first lamp bead 131, the second lamp bead 132, and the third lamp bead 133 to reduce the types of blue LED lamp beads 13, and reduce the number of components of the white light source and the cost of stocking. In another embodiment, the blue LED lamp bead 13 is two of the first lamp bead 131, the second lamp bead 132, and the third lamp bead 133, which can optimize the configuration of the synthesized white light by using two different peak wavelengths of blue light, so that the white light is closer to natural light, and compared with using three different peak wavelength lamp beads, it is beneficial to reduce the types of lamp beads, reduce the manufacturing cost and control cost.

[0069] In some embodiments, the number of red LED lamp beads 11, green LED lamp beads 12, blue LED lamp beads 13, and white LED lamp beads 14 is multiple, and any one color LED lamp bead in the multiple red LED lamp beads 11, the multiple green LED lamp beads 12, the multiple blue LED lamp beads 13, and the multiple white LED lamp beads 14 can be selected to be in series. The series connection reduces the number and complexity of the circuit in the circuit, making the wiring more concise and clear, which is beneficial to reduce the manufacturing difficulty and manufacturing cost, and the series current is the same, which reduces the abnormality of uneven brightness caused by uneven distribution of current in the circuit. Simplify the control difficulty. Specifically, the multiple red LED lamp beads 11 are in series, the multiple green LED lamp beads 12 are in series, the multiple blue LED lamp beads 13 are in series, and the multiple white LED lamp beads 14 are in series.

[0070] In other embodiments, the number of red LED lamp beads 11, green LED lamp beads 12, blue LED lamp beads 13, and white LED lamp beads 14 is multiple, and any one color LED lamp bead in the multiple red LED lamp beads 11, the multiple green LED lamp beads 12, the multiple blue LED lamp beads 13, and the multiple white LED lamp beads 14 forms at least two branches in parallel, which is beneficial to reduce the current of the branch and improve the safety in use. For example, the multiple red LED lamp beads 11 form four branches, and each branch is composed of six red LED lamp beads 11 in series.

[0071] Specifically, the power of each branch is the same, and the current of each branch is the same, so that the luminance of each lamp bead is consistent. At this time, the types of lamp beads on the branch can be the same or different, and the number of lamp beads can be the same or different, as long as the power is the same, which is not limited herein.

[0072] In some embodiments, in combination with FIG. 7, the plurality of blue light LED lamp beads 13 form a plurality of branches, each branch includes at least one of the first lamp bead 131, the second lamp bead 132 and the third lamp bead 133, and the plurality of branches are connected in parallel with each other. When the overall power of the blue light LED lamp beads 13 is large, the plurality of branches are connected in parallel, which is beneficial to the relatively uniform distribution of the total current to each branch, and is beneficial to reducing the current flowing through each branch, thereby reducing the current of the first lamp bead 131, the second lamp bead 132 and the third lamp bead 133 in each branch, and improving the safety in use.

[0073] In one of the embodiments, the second lamp bead 132 and / or the third lamp bead 133 are connected in series between the two first lamp beads 131 on the branch, that is, the two first lamp beads 131 are not arranged adjacent to each other, so as to ensure that the first lamp beads 131 are arranged dispersedly, so that the spectral distribution of the branch is more uniform and extensive.

[0074] In one of the embodiments, the first lamp bead 131 and / or the third lamp bead 133 are connected in series between the two second lamp beads 132 on the branch, that is, the two second lamp beads 132 are not arranged adjacent to each other, so as to ensure that the second lamp beads 132 are arranged dispersedly, so that the spectral distribution of the branch is more uniform and extensive.

[0075] In one of the embodiments, the first lamp bead 131 and / or the second lamp bead 132 are connected in series between the two third lamp beads 133 on the branch, that is, the two third lamp beads 133 are not arranged adjacent to each other, so as to ensure that the third lamp beads 133 are arranged dispersedly, so that the spectral distribution of the branch is more uniform and extensive.

[0076] Specifically, each branch includes the first lamp bead 131, the second lamp bead 132 and the third lamp bead 133 connected in series. In each branch, the number ratio of the first lamp bead 131, the second lamp bead 132 and the third lamp bead 133 is 1:1:1. On the one hand, the types and the number of lamp beads of the branch are the same, and the circuit design is more simple, which is beneficial to reducing the manufacturing cost and the control cost; on the other hand, the power and the current of each branch are ensured to be the same, so that the luminance of each lamp bead is consistent, and the spectral distribution is more uniform and extensive.

[0077] In some embodiments, the peak wavelength of the light emitted by the red LED lamp bead 11 is between 635 nm and 655 nm, the main peak wavelength of the light emitted by the blue LED lamp bead 13 is between 445 nm and 465 nm, and the peak wavelength of the light emitted by the white LED lamp bead 14 is between 580 nm and 620 nm. The peak wavelength of the light emitted by the green LED lamp bead 12 is between 510 nm and 530 nm.

[0078] Based on this, the peak wavelengths of the red LED lamp bead 11, the blue LED lamp bead 13, the white LED lamp bead 14, and the green LED lamp bead 12 are between 630 nm and 660 nm, 445 nm and 465 nm, 580 nm and 620 nm, and 510 nm and 530 nm, respectively. Compared with the white light synthesized by three colors, the white light synthesized by four colors has a larger color gamut range on the chromaticity diagram, and the coordinate point is more flexible and accurate. It is basically consistent or completely consistent with natural white light, and ensures that the Ra of the color rendering index CRI is higher than 96 in the range of 2500 K-10000 K (see FIG. 5). FIG. 5 is a light quality parameter diagram of an LED white light source, including the average quality parameter test results of the green LED lamp bead 12 as a green light chip and the green LED lamp bead 12 including the first light emitting chip and the first fluorescent powder. Compared with the white light synthesized by five colors or more than five colors, the light emitted by the LED lamp bead has fewer color types and fewer driving lines. This not only reduces the manufacturing cost, but also is beneficial to the miniaturization and light weight of the LED white light source, and improves the portability thereof. Referring to FIG. 5, the four-color spectrum mixing and superposition provided in the present application reduces the white light deviation and fluctuation, realizes a TLCI index higher than 93 in the color temperature range of 2500 K-2900 K, and higher than 95 in the color temperature range of 3000 K-20000 K, and takes into account the high requirements of color temperature range, color rendering index, and TLCI index, thereby meeting the high requirement index of TLCI index in the field of photographic lighting.

[0079] In the present application, the white light generated by the white light LED lamp bead 14 includes a part of the wave band of blue light and cyan light, which is beneficial to improve the TLCI index. Among them, the Ra of the color rendering index CRI is higher than 96 in the range of 2500K-10000K, and there are countless four-color spectrum combination schemes; the TLCI index is higher than 93 in the color temperature range of 2500K-2900K, and there are also countless four-color spectrum combination schemes, and both indicators meet, which is difficult to directly derive. In related designs, if the white light LED lamp bead 14 of the LED white light source provided by the present application is replaced by a yellow light LED lamp bead, the peak wavelength of the yellow light LED lamp bead is 570nm-590nm, combined with FIG. 6, the TLCI index is lower than 90 in the color temperature range of 2500K-2900K, and is lower than 95 in the color temperature range of 2900K-20000K, which cannot meet the TLCI requirement of photographic lighting. Similarly, in other schemes, replacing any one of the red light LED lamp bead 11, the green light LED lamp bead 12, the blue light LED lamp bead 13 and the white light LED lamp bead 14, or modifying the peak wavelength of the red light LED lamp bead 11, the green light LED lamp bead 12, the blue light LED lamp bead 13 and the white light LED lamp bead 14, it is difficult to simultaneously consider the high requirements of color rendering index and TLCI index.

[0080] In the present application, the red light LED lamp bead 11, the green light LED lamp bead 12, the blue light LED lamp bead 13 and the white light LED lamp bead 14 are all light-emitting lamp beads.

[0081] In some embodiments, in combination with FIGS. 1 and 2, the LED white light source further includes a first substrate 2, the first substrate 2 has a light-emitting surface 1, and a plurality of light-emitting lamp beads are mounted in the light-emitting surface 1.

[0082] The first substrate 2 can be a metal substrate or a ceramic substrate.

[0083] In one embodiment, the light-emitting lamp bead can be one or several of flip chip, flip CSP, vertical chip. For example, flip chip can provide better heat management capability, because the LED chip is directly mounted on the first substrate 2, which can more effectively conduct heat. Flip CSP technology directly packages the LED chip in a very small package, greatly reducing the volume and weight of the white light source. For another example, the vertical chip makes the light emission direction of the LED chip perpendicular to the first substrate 2, which is beneficial to the beam control and reflection management in optical design.

[0084] Therefore, by using flip chip, flip CSP or vertical chip as the packaging structure of the LED lamp bead, the heat management requirement, size limitation and optical design requirement of specific application can be optimized to achieve higher light efficiency, better heat management and more suitable optical characteristics, thereby improving the performance and application effect of the light source module.

[0085] Specifically, the LED white light source further comprises a second substrate 3, and a wire socket 32 and a thermistor 31 arranged on the second substrate 3. The second substrate 3 can be a copper substrate, which has excellent thermal conductivity and electrical conductivity. By arranging the first substrate 2 on the second substrate 3, the heat generated by the light-emitting beads during operation can be transferred to the second substrate 3, so as to achieve better heat management. The second substrate 3 can be externally electrically connected through the wire socket 32, so as to enable an external power supply to supply power to the light source. The thermistor 31 on the second substrate 3 is used for temperature detection and heat management control.

[0086] In one embodiment, the plurality of light-emitting beads are arranged in a matrix, which is conducive to saving the occupied space of the light-emitting beads and conducive to miniaturization design of the white light source.

[0087] In the two adjacent rows of light-emitting beads, one row is arranged with two of the red light LED beads 11, the green light LED beads 12, the blue light LED beads 13 and the white light LED beads 14, and the other row is arranged with the other two of the red light LED beads 11, the green light LED beads 12, the blue light LED beads 13 and the white light LED beads 14. This arrangement ensures that the light-emitting beads of each color are not concentrated in a certain area, thereby achieving color uniformity of the entire light-emitting surface 1, providing more consistent and uniform light efficiency, and generating more natural and uniform synthetic white light. Moreover, the types of light-emitting beads in each row are two, which is conducive to the first substrate 2 adopting a single-layer circuit process. It can be understood that, in other embodiments, each row of light-emitting beads includes four color beads, and the first substrate 2 adopts a double-sided double-layer circuit process.

[0088] For example, when arranging the light-emitting beads, a plurality of red light LED beads 11 and a plurality of green light LED beads 12 can be arranged in odd-numbered rows such as the first row and the third row, and a plurality of blue light LED beads 13 and a plurality of white light LED beads 14 can be arranged in even-numbered rows such as the second row and the fourth row.

[0089] In one embodiment, the light-emitting surface 1 is circular, so that the light can be more widely scattered, thereby covering a larger area, which helps to achieve more extensive light distribution in lighting applications and reduce the light spot effect.

[0090] Specifically, the plurality of light-emitting beads are arranged on the light-emitting surface 1, which reduces the light blind area and makes the distribution of light in space more delicate, thereby reducing the light spot phenomenon caused by sparse light-emitting beads.

[0091] Specifically, the plurality of light-emitting beads arranged along the circumferential direction of the light-emitting surface 1 include red light LED beads 11, green light LED beads 12, blue light LED beads 13 and white light LED beads 14, so that the edge of the light-emitting surface 1 is mixed into uniform white light.

[0092] Specifically, in the four light-emitting lamp beads arranged in the circumferential direction, at least three light-emitting lamp beads are different from each other, thereby further improving the uniformity of light efficiency and color, and enabling the light to be mixed uniformly.

[0093] On the basis of the structure, when arranging the light-emitting lamp beads, the colors of the first end light-emitting lamp bead or the tail end light-emitting lamp bead of the two odd-numbered rows or double rows can be set to be different. For example, the first end light-emitting lamp bead of the first row of light-emitting lamp beads is set to be a red light LED lamp bead 11, and the tail end light-emitting lamp bead is set to be a green light LED lamp bead 12. The first end light-emitting lamp bead of the third row of light-emitting lamp beads can be set to be a green light LED lamp bead 12, and the tail end light-emitting lamp bead is set to be a red light LED lamp bead 11. Alternatively, the color of the first end light-emitting lamp bead of the second row of light-emitting lamp beads can be the same as or different from the color of the first end light-emitting lamp bead of the fourth row of light-emitting lamp beads.

[0094] When arranging the light-emitting lamp beads, two types of light-emitting lamp beads in each row can be alternately arranged in the same number or different numbers. For example, in the odd-numbered rows of light-emitting lamp beads, one red light LED lamp bead 11 and two green light LED lamp beads 12 can be alternately arranged, so that the two sides of the red light LED lamp bead 11 are green light LED lamp beads 12, and one side of the green light LED lamp bead 12 is a red light LED lamp bead 11. Alternatively, one red light LED lamp bead 11 and one green light LED lamp bead 12 can be alternately arranged, so that the two sides of the light-emitting lamp bead are different colored lamp beads.

[0095] In this way, the light-emitting lamp beads of different colors can be adjacent to each other, so that the light emitted by the light source can be more uniformly mixed, which is conducive to producing uniform light color output. In addition, the number distribution and color combination of the light-emitting lamp beads can be adjusted according to specific lighting needs to achieve specific lighting effects or meet different application needs.

[0096] Further, the plurality of light-emitting lamp beads in each of the two adjacent rows include red light LED lamp beads 11 and green light LED lamp beads 12 in one row, and blue light LED lamp beads 13 and white light LED lamp beads 14 in the other row. The light emitted by the red light LED lamp beads 11 and the green light LED lamp beads 12 is mixed to generate yellow light, and the light emitted by the blue light LED lamp beads 13 and the white light LED lamp beads 14 is mixed to adjust the color temperature of the overall light source. Therefore, the red light LED lamp beads 11 and the green light LED lamp beads 12 are arranged in the same row, and the blue light LED lamp beads 13 and the white light LED lamp beads 14 are arranged in the other row. The arrangement of the light-emitting lamp beads of different colors in adjacent rows can reduce the area dominated by a single color, so that the color distribution of the light source is more uniform. In addition, the red-green combination and the blue-white combination complement each other, which can optimize the color mixing effect. By adjusting the proportion of red-green and blue-white lamp beads, more accurate color control can be achieved.

[0097] Further, the red light LED lamp beads 11, the green light LED lamp beads 12, the blue light LED lamp beads 13, and the white light LED lamp beads 14 are uniformly distributed in the light-emitting surface 1, and the light-emitting lamp beads of any color are symmetrically distributed in the light-emitting surface 1.

[0098] Specifically, the light-emitting lamp beads of any color are symmetrically distributed about the row direction X passing through the center of the light-emitting surface 1, and / or about the column direction Y passing through the center of the light-emitting surface 1, and / or about the center of the light-emitting surface 1. This can improve the uniformity of light mixing, improve the optical utilization rate, and reduce the cost of subsequent optical processing.

[0099] In some embodiments, in combination with FIG. 7, the LED white light source includes a control unit 4 and first, second, third, and fourth driving circuits 41, 42, 43, and 44 electrically connected to the control unit 4, respectively. The first driving circuit 41 is electrically connected to the red light LED lamp beads 11, the second driving circuit 42 is electrically connected to the green light LED lamp beads 12, the third driving circuit 43 is electrically connected to the blue light LED lamp beads 13, and the fourth driving circuit 44 is electrically connected to the white light LED lamp beads 14. In this embodiment, the red light LED lamp beads 11, the green light LED lamp beads 12, the blue light LED lamp beads 13, and the white light LED lamp beads 14 are independent of each other. The control unit 4 adjusts the on-off and current of the red light LED lamp beads 11, the green light LED lamp beads 12, the blue light LED lamp beads 13, and the white light LED lamp beads 14 through the first, second, third, and fourth driving circuits 41, 42, 43, and 44, respectively, to form white light with adjustable color temperature.

[0100] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An LED white light source, wherein: The white LED light source includes independently controlled red LED beads (11), green LED beads (12), blue LED beads (13) and white LED beads (14); When the green LED bead (12) is a green chip, the ratio of the luminous flux of the red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) is 1.8~2.0:5.5~5.6:1:15~16; Alternatively, when the green LED bead (12) includes a first light-emitting chip and a first phosphor covering the first light-emitting chip, the ratio of the luminous flux of the red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) is 1.8-2.0:12-13:1:14-15.

2. The LED white light source according to claim 1, wherein: The red LED bead (11) includes a second light-emitting chip and a second phosphor covering the second light-emitting chip, wherein the peak wavelength of the second phosphor is between 635nm and 660nm.

3. The LED white light source according to claim 2, wherein: The white LED bead (14) includes a third light-emitting chip and a third phosphor covering the third light-emitting chip, wherein the peak wavelength of the third phosphor is between 580nm and 620nm.

4. The LED white light source according to claim 3, wherein: The third light-emitting chip is the same as the second light-emitting chip; and / or, the third phosphor includes at least one of green phosphor, orange phosphor and red phosphor.

5. The LED white light source according to claim 1, wherein: The white LED bead (14) emits light with a color temperature range of 2850K to 3250K; and / or, the white LED bead (14) emits light with a Duv range of +0.005 to +0.

015.

6. The LED white light source according to claim 1, wherein: The blue LED bead (13) includes a first bead (131), a second bead (132), and a third bead (133). The peak wavelength of the first bead (131) is 400nm to 410nm, the peak wavelength of the second bead (132) is 445nm to 455nm, and the peak wavelength of the third bead (133) is 455nm to 465nm.

7. The LED white light source according to claim 6, wherein: The power ratio of the first LED (131), the second LED (132), and the third LED (133) is 4:5:3; And / or, the peak wavelength of the first LED (131) is 407nm, the peak wavelength of the second LED (132) is 452nm, and the peak wavelength of the third LED (133) is 460nm.

8. The LED white light source according to claim 1, wherein: The main peak wavelength of the blue LED bead (13) is between 445nm and 465nm; The spectrum of the blue LED bead (13) also includes a secondary peak with a wavelength of 400nm to 420nm; When the green LED bead (12) is the green chip, the light intensity of the second peak of the blue LED bead (13) is less than 65% of the light intensity of the peak wavelength of the blue LED bead (13); When the green LED bead (12) includes the first light-emitting chip and the first phosphor, the light intensity of the second peak of the blue LED bead (13) is 90% to 100% of the light intensity of the peak wavelength of the blue LED bead (13).

9. The LED white light source according to claim 1, wherein: The peak wavelength of the green LED bead (12) is between 510nm and 530nm.

10. The LED white light source according to claim 1, wherein: The white LED light source also includes a first substrate (2), which has a light-emitting surface (1). The red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) are all light-emitting beads, and a plurality of the light-emitting beads are installed in the light-emitting surface (1). Multiple LED beads are arranged in a row and column pattern; in two adjacent rows of LED beads, one row is arranged with two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14); the other row is arranged with the other two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14). The light-emitting surface (1) is circular; a plurality of light-emitting LED beads cover the light-emitting surface (1); the plurality of light-emitting LED beads arranged along the circumference of the light-emitting surface (1) include the red LED bead (11), the green LED bead (12), the blue LED bead (13) and the white LED bead (14); among the four consecutive light-emitting LED beads arranged along the circumference, at least three of the light-emitting LED beads are different from each other.

11. The LED white light source according to claim 2, wherein: The white LED light source also includes a first substrate (2), which has a light-emitting surface (1). The red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) are all light-emitting beads, and a plurality of the light-emitting beads are installed in the light-emitting surface (1). Multiple LED beads are arranged in a row and column pattern; in two adjacent rows of LED beads, one row is arranged with two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14); the other row is arranged with the other two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14). The light-emitting surface (1) is circular; a plurality of light-emitting LED beads cover the light-emitting surface (1); the plurality of light-emitting LED beads arranged along the circumference of the light-emitting surface (1) include the red LED bead (11), the green LED bead (12), the blue LED bead (13) and the white LED bead (14); among the four consecutive light-emitting LED beads arranged along the circumference, at least three of the light-emitting LED beads are different from each other.

12. The LED white light source according to claim 3, wherein: The white LED light source also includes a first substrate (2), which has a light-emitting surface (1). The red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) are all light-emitting beads, and a plurality of the light-emitting beads are installed in the light-emitting surface (1). Multiple LED beads are arranged in a row and column pattern; in two adjacent rows of LED beads, one row is arranged with two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14); the other row is arranged with the other two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14). The light-emitting surface (1) is circular; a plurality of light-emitting LED beads cover the light-emitting surface (1); the plurality of light-emitting LED beads arranged along the circumference of the light-emitting surface (1) include the red LED bead (11), the green LED bead (12), the blue LED bead (13) and the white LED bead (14); among the four consecutive light-emitting LED beads arranged along the circumference, at least three of the light-emitting LED beads are different from each other.

13. The LED white light source according to claim 4, wherein: The white LED light source also includes a first substrate (2), which has a light-emitting surface (1). The red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) are all light-emitting beads, and a plurality of the light-emitting beads are installed in the light-emitting surface (1). Multiple LED beads are arranged in a row and column pattern; in two adjacent rows of LED beads, one row is arranged with two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14); the other row is arranged with the other two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14). The light-emitting surface (1) is circular; a plurality of light-emitting LED beads cover the light-emitting surface (1); the plurality of light-emitting LED beads arranged along the circumference of the light-emitting surface (1) include the red LED bead (11), the green LED bead (12), the blue LED bead (13) and the white LED bead (14); among the four consecutive light-emitting LED beads arranged along the circumference, at least three of the light-emitting LED beads are different from each other.

14. The LED white light source according to claim 5, wherein: The white LED light source also includes a first substrate (2), which has a light-emitting surface (1). The red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) are all light-emitting beads, and a plurality of the light-emitting beads are installed in the light-emitting surface (1). Multiple LED beads are arranged in a row and column pattern; in two adjacent rows of LED beads, one row is arranged with two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14); the other row is arranged with the other two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14). The light-emitting surface (1) is circular; a plurality of light-emitting LED beads cover the light-emitting surface (1); the plurality of light-emitting LED beads arranged along the circumference of the light-emitting surface (1) include the red LED bead (11), the green LED bead (12), the blue LED bead (13) and the white LED bead (14); among the four consecutive light-emitting LED beads arranged along the circumference, at least three of the light-emitting LED beads are different from each other.

15. The LED white light source according to claim 6, wherein: The white LED light source also includes a first substrate (2), which has a light-emitting surface (1). The red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) are all light-emitting beads, and a plurality of the light-emitting beads are installed in the light-emitting surface (1). Multiple LED beads are arranged in a row and column pattern; in two adjacent rows of LED beads, one row is arranged with two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14); the other row is arranged with the other two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14). The light-emitting surface (1) is circular; a plurality of light-emitting LED beads cover the light-emitting surface (1); the plurality of light-emitting LED beads arranged along the circumference of the light-emitting surface (1) include the red LED bead (11), the green LED bead (12), the blue LED bead (13) and the white LED bead (14); among the four consecutive light-emitting LED beads arranged along the circumference, at least three of the light-emitting LED beads are different from each other.

16. The LED white light source according to claim 7, wherein: The white LED light source also includes a first substrate (2), which has a light-emitting surface (1). The red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) are all light-emitting beads, and a plurality of the light-emitting beads are installed in the light-emitting surface (1). Multiple LED beads are arranged in a row and column pattern; in two adjacent rows of LED beads, one row is arranged with two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14); the other row is arranged with the other two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14). The light-emitting surface (1) is circular; a plurality of light-emitting LED beads cover the light-emitting surface (1); the plurality of light-emitting LED beads arranged along the circumference of the light-emitting surface (1) include the red LED bead (11), the green LED bead (12), the blue LED bead (13) and the white LED bead (14); among the four consecutive light-emitting LED beads arranged along the circumference, at least three of the light-emitting LED beads are different from each other.

17. The LED white light source according to claim 8, wherein: The white LED light source also includes a first substrate (2), which has a light-emitting surface (1). The red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) are all light-emitting beads, and a plurality of the light-emitting beads are installed in the light-emitting surface (1). Multiple LED beads are arranged in a row and column pattern; in two adjacent rows of LED beads, one row is arranged with two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14); the other row is arranged with the other two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14). The light-emitting surface (1) is circular; a plurality of light-emitting LED beads cover the light-emitting surface (1); the plurality of light-emitting LED beads arranged along the circumference of the light-emitting surface (1) include the red LED bead (11), the green LED bead (12), the blue LED bead (13) and the white LED bead (14); among the four consecutive light-emitting LED beads arranged along the circumference, at least three of the light-emitting LED beads are different from each other.

18. The LED white light source according to claim 9, wherein: The white LED light source also includes a first substrate (2), which has a light-emitting surface (1). The red LED bead (11), the green LED bead (12), the blue LED bead (13), and the white LED bead (14) are all light-emitting beads, and a plurality of the light-emitting beads are installed in the light-emitting surface (1). Multiple LED beads are arranged in a row and column pattern; in two adjacent rows of LED beads, one row is arranged with two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14); the other row is arranged with the other two of the following: red LED beads (11), green LED beads (12), blue LED beads (13), and white LED beads (14). The light-emitting surface (1) is circular; a plurality of light-emitting LED beads cover the light-emitting surface (1); the plurality of light-emitting LED beads arranged along the circumference of the light-emitting surface (1) include the red LED bead (11), the green LED bead (12), the blue LED bead (13) and the white LED bead (14); among the four consecutive light-emitting LED beads arranged along the circumference, at least three of the light-emitting LED beads are different from each other.

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