LED light source

Abstract

An LED light source, comprising red light lamp beads (11), green light chips (12), blue light chips (13), purple light chips (14), amber light lamp beads (15), cyan light chips (16), and lemon light lamp beads (17). Each of the red light lamp beads (11) comprises a first light-emitting chip and red fluorescent powder covering the first light-emitting chip, each of the amber light lamp beads (15) comprises a second light-emitting chip and amber fluorescent powder covering the second light-emitting chip, and each of the lemon light lamp beads (17) comprises a third light-emitting chip and lemon fluorescent powder covering the third light-emitting chip. By using exciting fluorescent powder to emit light, the brightness of light is improved, the full width at half maximum is increased, and better color continuity is achieved; by using chips to emit light, the purity of these colored light rays is ensured, meeting the requirements for high-purity colored light output; and through the matching and combination of seven colors of light, wider color gamut coverage and smoother color transition are achieved, enabling generation of a spectral distribution closer to that of sunlight, with a measured spectral similarity index (SSI) exceeding 90.

Description

LED light source

[0001] This application claims priority to Chinese Patent Application No. 202411451776.5, filed with the Chinese Patent Office on October 17, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of lighting technology, and in particular to an LED light source. Background Technology

[0003] LED light sources are widely used in home lighting, commercial lighting, stage lighting, film and television shooting, theater and studio lighting, museum lighting, medical lighting, and plant growth lighting. Currently, people have increasingly higher demands for the color richness, color saturation, and color accuracy of light sources. Against this backdrop, existing LED light sources are required to achieve wider color gamut coverage and more delicate color transitions. Summary of the Invention

[0004] The purpose of this invention is to provide an LED light source that addresses the technical problem that existing LED light sources need to improve their color gamut coverage and color transition.

[0005] This application provides an LED light source, which includes red LED beads, green LED chips, blue LED chips, purple LED chips, amber LED beads, cyan LED chips, and lemon LED beads. The red LED beads include a first LED chip and red phosphor covering the first LED chip. The amber LED beads include a second LED chip and amber phosphor covering the second LED chip. The lemon LED beads include a third LED chip and lemon phosphor covering the third LED chip.

[0006] In one embodiment, at least one of the first light-emitting chip, the second light-emitting chip, and the third light-emitting chip is a blue light chip.

[0007] In one embodiment, the peak wavelength of the red phosphor is 610 nm to 650 nm.

[0008] In one embodiment, the peak wavelength of the amber phosphor is 590 nm to 620 nm.

[0009] In one embodiment, the peak wavelength of the lemon-colored phosphor is 530 nm to 550 nm.

[0010] In one embodiment, the peak wavelength of the green light chip is 505nm to 535nm.

[0011] In one embodiment, the peak wavelength of the blue light chip is 445nm to 460nm.

[0012] In one embodiment, the peak wavelength of the violet light chip is 390nm to 420nm.

[0013] In one embodiment, the peak wavelength of the cyan light chip is 480nm to 500nm.

[0014] In one embodiment, the peak wavelength of the red phosphor is 637 nm; the peak wavelength of the amber phosphor is 606 nm; the peak wavelength of the lemon phosphor is 540 nm; the peak wavelength of the green light chip is 519 nm; the peak wavelength of the blue light chip is 452 nm; the peak wavelength of the violet light chip is 408 nm; and the peak wavelength of the cyan light chip is 484 nm.

[0015] In one embodiment, the red LED, the green LED, the blue LED, the violet LED, the amber LED, the cyan LED, and the lemon LED are each driven by an independent control circuit.

[0016] In one embodiment, the red LED, the green LED chip, the blue LED chip, the amber LED, the cyan LED chip, and the lemon LED are each driven by an independent control circuit, while the violet LED chip and the blue LED chip are driven by the same control circuit.

[0017] In one embodiment, when the color temperature of the LED light source is 3200K, the brightness ratio of the red LED bead, the green LED chip, the blue LED chip, the violet LED chip, the amber LED bead, the cyan LED chip, and the lemon LED bead is 0.1-0.15:0.001-0.005:0.002-0.007:0.14-0.22:0.04-0.08:0.5-0.8.

[0018] In one embodiment, when the LED light source has a color temperature of 5600K, the brightness ratio of the red LED bead, the green LED chip, the blue LED chip, the violet LED chip, the amber LED bead, the cyan LED chip, and the lemon LED bead is 0.04-0.08:0.014-0.022:0.012-0.017:0.06-0.1:0.08-0.12:0.65-0.8.

[0019] In one embodiment, the LED light source includes a first substrate, one side of which has a light-emitting surface. The light-emitting surface is equipped with multiple rows of light-emitting LED beads, including red LED beads, green LED chips, blue LED chips, purple LED chips, amber LED beads, cyan LED chips, and lemon LED beads.

[0020] In one embodiment, each row of LED beads emits up to four different colors of light.

[0021] In one embodiment, the light-emitting surface is circular.

[0022] In one embodiment, a plurality of the light-emitting beads cover the light-emitting surface.

[0023] In one embodiment, the LED beads of each color are symmetrically distributed about the row direction passing through the center of the light-emitting surface, or the LED beads of each color are symmetrically distributed about the center of the light-emitting surface.

[0024] In one embodiment, the red LED and the green LED chip are located in the same row of LEDs.

[0025] In one embodiment, the blue light chip and the lemon light LED are located in the same row of LEDs.

[0026] In one embodiment, two adjacent light-emitting beads on the same circumferential direction of the light-emitting surface emit different colors of light.

[0027] The beneficial effects of the LED light source provided by this invention are as follows: Compared with the traditional RGB three-color light source, the LED light source provided in this application includes not only red light chips, green light chips, and blue light chips, but also violet light chips, amber light chips, cyan light chips, and lemon light chips. Among them, the red light chips, amber light chips, and lemon light chips use excitation phosphors to emit light, which helps to improve light brightness and increase the half-peak width, making the synthesized white light wider in color gamut, with better color continuity and smoother transitions between colors, avoiding the problem of abnormally prominent red, cyan, or lemon light in the spectrum. The blue light chip, cyan light chip, green light chip, and violet light chip use chip-based light emission, ensuring the light emission of these colors. The purity of the light source meets the requirements for high-purity colored light output. If green light is emitted by exciting phosphors, it will lead to an increase in the half-peak width and a whitening effect, thus reducing the color rendering requirements of the colored light. Based on this, by combining seven colors of light, color abrupt changes and discontinuities are reduced, enabling LED light sources to present more natural and smooth color changes in display and lighting applications. It can produce a spectral distribution that is closer to sunlight, and its spectral similarity index (SSI) is measured to be over 90. This achieves a wider color gamut coverage and more delicate color transitions, solving the technical problems that existing LED light sources need to improve in terms of color gamut coverage and color transitions, and significantly improving the accuracy of color reproduction and detail expression. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 is a schematic diagram of the structure of the LED light source provided in an embodiment of the present invention;

[0030] Figure 2 is a spectral combination diagram of the LED light source provided in an embodiment of the present invention;

[0031] Figure 3 shows the spectrum of the LED light source provided in the embodiment at a color temperature of 3200K;

[0032] Figure 4 shows the spectrum of the LED light source provided in the embodiment at a color temperature of 5600K.

[0033] The following are the reference numerals in the figure: 11, red LED bead; 12, green LED chip; 13, blue LED chip; 14, purple LED chip; 15, amber LED bead; 16, cyan LED chip; 17, lemon LED bead; 20, first substrate; 21, light-emitting surface; 30, second substrate. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] Throughout this specification, references to "an embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, particular features, structures, or characteristics may be combined in any suitable manner.

[0036] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Referring to Figures 1 and 2, this application provides an LED light source. The LED light source includes a red LED chip 11, a green LED chip 12, a blue LED chip 13, a purple LED chip 14, an amber LED chip 15, a cyan LED chip 16, and a lemon LED chip 17. In Figures 1 and 2, R represents the red LED chip 11, G represents the green LED chip 12, B represents the blue LED chip 13, A represents the amber LED chip 15, C represents the cyan LED chip 16, and L represents the lemon LED chip 17. In one possible example, the blue LED chip 13 and the purple LED chip 14 are driven by the same control circuit; for example, B in Figure 1 represents the blue LED chip 13 and the purple LED chip 14 packaged as a single unit.

[0040] In this embodiment, the blue light chip 13, cyan light chip 16, green light chip 12, and violet light chip 14 employ chip-based light emission, enabling them to precisely emit light of specific wavelengths. This ensures the high purity of these colors, meeting the high-purity colored light output requirements of LED light sources. Furthermore, the wavelength ranges of blue, cyan, green, and violet light are narrow. If phosphors are used to excite these colors, their half-peak width (HWHM) will widen, causing confusion with adjacent wavelengths, reducing their purity, and lowering the color rendering effect of the LED light source. Specifically, using phosphors to excite green light will increase the HWHM and cause the light to appear whitish, thus reducing the color rendering index (CRI).

[0041] In this embodiment, the red LED bead 11 includes a first light-emitting chip and red phosphor covering the first light-emitting chip; the amber LED bead 15 includes a second light-emitting chip and amber phosphor covering the second light-emitting chip; and the lemon LED bead 17 includes a third light-emitting chip and lemon phosphor covering the third light-emitting chip. The red LED bead 11, amber LED bead 15, and lemon LED bead 17 use phosphor excitation to emit light, which helps to improve light brightness and increase the half-peak width (WHM). This results in a wider color gamut, better color continuity, and smoother transitions between colors in the synthesized white light, avoiding abrupt and unnatural color transitions caused by abnormally prominent peaks in red, cyan, or lemon light in the spectrum. Specifically, red light has a large wavelength range, so increasing its WHM still falls within the red light wavelength range. While the excitation of phosphor in amber and lemon light reduces light purity, their proportion in colored light is small, so increasing their WHM actually helps to improve color saturation. Furthermore, by optimizing the formulation and ratio of phosphors, a more efficient luminescence effect can be achieved, thereby reducing the overall cost.

[0042] Compared to traditional RGB three-color light sources, the LED light source provided in this application includes not only red LED chips 11, green LED chips 12 and blue LED chips 13, but also purple LED chips 14, amber LED chips 15, cyan LED chips 16 and lemon LED chips 17. Based on this, through the combination of seven colors of light, the LED light source can present more natural and smooth color changes in display and lighting applications, and can produce a spectral distribution that is closer to sunlight. Its spectral similarity index (SSI) is measured to be over 90, achieving a wider color gamut coverage and more delicate color transitions, significantly improving the accuracy of color reproduction and detail expression.

[0043] In some embodiments, at least one of the first light-emitting chip, the second light-emitting chip, and the third light-emitting chip is a blue light chip 13, in order to reduce the types of materials prepared and reduce the frequency of changing different types of chips during the production process, thereby reducing the cost and time of production line adjustment.

[0044] Optionally, one of the first, second, and third light-emitting chips is a blue light-emitting chip 13. Optionally, two of the first, second, and third light-emitting chips are blue light-emitting chips 13. Optionally, all three light-emitting chips are blue light-emitting chips 13, which greatly reduces the types of light-emitting chips and further reduces the types of chip materials required.

[0045] In some embodiments, referring to Figure 2, the peak wavelength of the red phosphor is 610 nm to 650 nm. Within this wavelength range, the red phosphor can excite pure and bright red light with excellent light parameters. If the peak wavelength of the red phosphor is below 610 nm, the light color is impure, and the light parameters do not meet the standards. If the peak wavelength of the red phosphor is above 650 nm, the light color is dim, requiring an increase in the number or power of the red LED beads 11.

[0046] In one embodiment, referring to Figure 2, the peak wavelength of the red phosphor is 637 nm. The red phosphor with a peak wavelength of 637 nm can excite pure and bright red light with high color saturation and good photostability, which helps to improve the color rendering index (CRI) of the LED light source.

[0047] Specifically, referring to Figure 2, the spectrum of the red phosphor includes a first band with wavelengths less than 620 nm and wavelengths greater than 658 nm. The light intensity of the first band (see the vertical axis of Figure 2) is less than or equal to 80% of the light intensity of the peak wavelength of the red phosphor at 637 nm. This limits the light intensity of non-peak wavelengths of red light, optimizes the spectral distribution of red light, reduces stray light, and makes the light purer and the color more saturated. On the one hand, this is beneficial to improve the TLCI index, and on the other hand, it is beneficial to concentrate energy at the peak wavelength and reduce energy loss.

[0048] In some embodiments, referring to Figure 2, the peak wavelength of the amber phosphor is 590 nm to 620 nm. Amber phosphors within this peak wavelength range emit pure and warm amber light with high color saturation and excellent light parameters. If the peak wavelength of the amber phosphor is less than 590 nm or greater than 620 nm, the light purity is insufficient, and the power of the amber light bulb 15 needs to be increased.

[0049] In one embodiment, referring to Figure 2, the peak wavelength of the amber phosphor is 606nm. The amber phosphor with a peak wavelength of 606nm can excite pure and bright amber light with high light stability and high color saturation.

[0050] Specifically, referring to Figure 2, the spectrum of the amber phosphor includes a second band with wavelengths less than 583nm and greater than 630nm. The light intensity of the second band is less than or equal to 80% of the light intensity at the peak wavelength of 606nm of the amber phosphor. On the one hand, the second band can broaden the spectral range, making the light emitted by the amber phosphor transition smoothly and the light delicate. On the other hand, controlling the light intensity of the second band can optimize the luminous efficiency of the amber phosphor while ensuring that the light color is purer.

[0051] In some embodiments, referring to Figure 2, the peak wavelength of the lemon-colored phosphor is 530nm to 550nm, which can excite bright and pure lemon-colored light with high color saturation, improving color richness and accuracy, and exhibiting excellent light parameters. If the peak wavelength of the lemon-colored phosphor is less than 530nm or greater than 550nm, the light purity is insufficient, and the power consumption increases.

[0052] In one embodiment, referring to Figure 2, the peak wavelength of the lemon-colored phosphor is 540nm, which can excite bright and pure lemon-colored light with high color saturation and high light stability.

[0053] Specifically, referring to Figure 2, the spectrum of the lemon-colored phosphor includes a third band with wavelengths less than 519 nm and greater than 583 nm. The light intensity of the third band is less than or equal to 80% of the light intensity at the peak wavelength of 540 nm of the lemon-colored phosphor. Based on this, on the one hand, the third band can broaden the spectral range, making the light emitted by the lemon-colored phosphor richer in color and more delicate; on the other hand, reasonably controlling the light intensity of the third band can optimize the luminous efficiency of the lemon-colored phosphor while ensuring purer light color.

[0054] In some embodiments, referring to Figure 2, the peak wavelength of the green light chip 12 is 505nm to 535nm, which makes the generated green light purer, the color more saturated, the light parameter indicators excellent, and the luminous efficiency optimized.

[0055] In one embodiment, referring to Figure 2, the peak wavelength of the green light chip 12 is 519nm, which can excite bright and pure green light with high color saturation and good photostability.

[0056] Specifically, referring to Figure 2, the spectrum of the green light chip 12 includes a fourth band with wavelengths less than 511nm and wavelengths greater than 527nm. The light intensity of the fourth band is less than or equal to 80% of the light intensity of the peak wavelength 519nm of the green light chip 12. By limiting the light intensity of the fourth band (non-peak wavelength range), stray light can be effectively reduced, making the green light purer.

[0057] In some embodiments, referring to Figure 2, the peak wavelength of the blue light chip 13 is 445nm to 460nm, which can emit a bright and unique blue light with high color saturation and excellent light parameter indicators.

[0058] In one embodiment, the blue light chip 13 has a peak wavelength of 452nm, which can emit bright and pure blue light, has high luminous efficiency, and has good photostability.

[0059] Specifically, the light intensity of the blue light chip 13 at its peak wavelength of 452nm is 85%–90% of the light intensity of the violet light chip 14 at its peak wavelength, resulting in a smooth and natural transition between blue and violet light. Since the luminance of the blue light chip 13 is higher than that of the violet light chip 14 under the same current, the brightness of blue light is reduced by limiting the light intensity of the peak wavelength of the blue light chip 13, thus ensuring a balanced proportion of blue light in the spectrum (see Figures 3 and 4). Specifically, the brightness ratio of the blue light chip 13 to the violet light chip 14 is 9:1.

[0060] Specifically, referring to Figure 2, the spectrum of the blue light chip 13 includes a fifth band with wavelengths less than 450 nm and greater than 455 nm. The light intensity of the fifth band is less than or equal to 80% of the light intensity of the peak wavelength of the violet light chip 14. By controlling the light intensity of the fifth band, it is distinguished from violet light, reducing stray light from the blue light, improving the purity of both blue and violet light, optimizing spectral characteristics, and improving luminous efficiency.

[0061] In some embodiments, the blue light chip 13 includes a first chip, a second chip, and a third chip. The peak wavelength of the first chip is 435nm–445nm, the peak wavelength of the second chip is 445nm–455nm, and the peak wavelength of the third chip is 455nm–465nm. Based on this, the blue light chip 13, by using chips with three different peak wavelengths, can achieve a wider spectral coverage, thereby significantly improving the Spectral Similarity Index (SSI). For example, when the target color temperature is 3200K, the SSI reaches above 95. The combination of different peak wavelengths makes the spectral distribution of the blue light chip 13 closer to natural light, providing a more realistic and natural lighting environment for applications such as photographic fill light, resulting in more realistic color reproduction and higher detail in photographic works. Simultaneously, a spectral distribution closer to natural light can reduce eye fatigue and discomfort, improving visual comfort.

[0062] In one embodiment, the power ratio of the first chip, the second chip, and the third chip is 4:5:3. The second chip provides blue light that is closer to a pure color, and its larger power ratio facilitates achieving a higher color temperature and expanding the color temperature range. This power ratio range allows for flexible adjustment of the color temperature, brightness, and spectral distribution of the blue light chip 13, resulting in a wider spectral coverage of the light source while maintaining spectral characteristics similar to natural light. This improves the spectral similarity index of the light source, optimizes its color rendering, and enhances visual comfort.

[0063] In this embodiment, the peak wavelength of the light emitted by the blue light chip 13 is between 445nm and 460nm. Shorter wavelength blue light (closer to 445nm) is suitable for applications requiring high brightness and high contrast, while longer wavelength blue light (closer to 460nm) is suitable for applications requiring softer light. For example, when the blue light chip 13 includes a first chip, a second chip, and a third chip, the first chip, the second chip, and the third chip are connected in series, achieving a peak wavelength of 452nm for the blue light chip 13.

[0064] In one embodiment, the peak wavelength of the first chip is 440 nm, the peak wavelength of the second chip is 450 nm, and the peak wavelength of the third chip is 460 nm. Since wavelength 452 nm is closer to the center of pure blue, the peak wavelength of the second chip, 450 nm, is selected. The first chip and the third chip use shorter wavelengths (440 nm) and longer wavelengths (460 nm), respectively, so that the spectral distribution of the entire blue light chip 13 is more extensive and uniform.

[0065] In some embodiments, referring to Figure 2, the peak wavelength of the violet light chip 14 is 390nm to 420nm, which makes the generated violet light purer, the color more saturated, and the light parameter indicators excellent.

[0066] In one embodiment, the violet chip 14 has a peak wavelength of 408nm, which can emit bright and pure violet light with high color saturation and high light stability.

[0067] Specifically, referring to Figure 2, the spectrum of the violet chip 14 includes a sixth band with wavelengths less than 403nm and greater than 410nm. The light intensity of the sixth band is less than or equal to 80% of the light intensity of the peak wavelength of the violet chip 14 at 408nm. Based on this, on the one hand, the sixth band can broaden the spectral range, making the light emitted by the violet chip 14 richer in color and more delicate; on the other hand, by reasonably controlling the light intensity of the sixth band, the luminous efficiency of the violet chip 14 can be optimized while ensuring that the light color is purer.

[0068] In some embodiments, referring to Figure 2, the peak wavelength of the cyan chip 16 is 480nm to 500nm, which enables the cyan chip 16 to emit bright and stable cyan light with high color saturation.

[0069] In one embodiment, the cyan chip 16 has a peak wavelength of 484nm, which can emit bright and pure cyan light. The peak wavelength of 484nm gives the cyan chip 16 better photostability.

[0070] Specifically, referring to Figure 2, the spectrum of the cyan chip 16 includes a seventh band with wavelengths less than 478 nm and greater than 491 nm. The light intensity of the seventh band is less than or equal to 80% of the light intensity at the peak wavelength of 484 nm of the cyan chip 16. By controlling the light intensity of the seventh band, the color distribution of the entire spectrum can be made more balanced.

[0071] Among them, the blue light chip 13 and the violet light chip 14 have similar wavelengths, and they play a basically the same role in color temperature adjustment and white light synthesis. Regardless of whether the blue light chip 13 and the violet light chip 14 are driven by the same control circuit or by different control circuits, the overall brightness of the blue light chip 13 and the violet light chip 14 is treated as a whole to regulate the color temperature of the LED light source.

[0072] In some embodiments, referring to Figures 1 and 3, when the color temperature of the LED light source is 3200K, the brightness ratio of the red LED chip 11, green LED chip 12, blue LED chip 13, violet LED chip 14, amber LED chip 15, cyan LED chip 16, and lemon LED chip 17 is (0.1-0.15):(0.001-0.005):(0.002-0.007):(0.14-0.22):(0.04-0.08):(0.5-0.8). By precisely controlling the brightness ratio of various colored LED chips / beads, the color rendering index of the LED light source can be significantly improved, and its spectral similarity index (SSI) can reach over 90.

[0073] In some embodiments, referring to Figures 1 and 4, when the color temperature of the LED light source is 5600K, the brightness ratios of the red LED chip 11, green LED chip 12, blue LED chip 13, violet LED chip 14, amber LED chip 15, cyan LED chip 16, and lemon LED chip 17 are (0.04-0.08):(0.014-0.022):(0.012-0.017):(0.06-0.1):0.08-0.12):(0.65-0.8). By precisely controlling the brightness ratios of various colored LED chips / beads, the color rendering index of the LED light source can be significantly improved, with its spectral similarity index (SSI) reaching over 90.

[0074] In some embodiments, referring to FIG1, the light-emitting LED beads include red LED beads 11, green LED chips 12, blue LED chips 13, violet LED chips 14, amber LED beads 15, cyan LED chips 16, and lemon LED beads 17. The LED light source includes a first substrate 20, one side of which has a light-emitting surface 21. The light-emitting surface 21 is equipped with LED beads arranged in multiple rows, which helps to save the space occupied by the LED beads and facilitates the miniaturization design of the light source module.

[0075] Optionally, the first substrate 20 may be a metal substrate or a ceramic substrate.

[0076] In one embodiment, the LED chip can be one or more of flip-chip, flip-chip CSP, and vertical chip technologies. For example, flip-chip technologies offer better thermal management because the LED chip is directly mounted on the first substrate 20, allowing for more efficient heat conduction. Flip-chip CSP technology directly encapsulates the LED chip in a very small package, significantly reducing the size and weight of the light source module. Vertical chips, on the other hand, ensure that the light emission direction of the LED chip is perpendicular to the first substrate 20, which is beneficial for beam control and reflection management in optical design. Therefore, using flip-chip, flip-chip CSP, or vertical chip as the packaging structure for LED chips can be optimized according to the specific application's thermal management requirements, size limitations, and optical design requirements to achieve higher luminous efficacy, better thermal management, and more suitable optical characteristics, thereby improving the performance and application effect of the light source.

[0077] In some embodiments, referring to FIG1, the LED light source further includes a second substrate 30 and a wiring socket disposed on the second substrate 30. The first substrate 20 is disposed on the second substrate 30 and can transfer the heat generated during the operation of the light-emitting beads to the second substrate 30 to achieve better thermal management. The second substrate 30 can be connected to an external power source through the wiring socket to allow an external power supply to power the light source.

[0078] Specifically, in Figure 1, R+ represents the wiring socket for the positive terminal of the red LED 11, R- represents the wiring socket for the negative terminal of the red LED 11, G+ represents the wiring socket for the positive terminal of the green LED chip 12, G- represents the wiring socket for the negative terminal of the green LED chip 12, and so on. Optionally, since there are many red LEDs 11, the number of R+ and R- is two each, indicating that each has two pins, which helps to reduce the current on each circuit controlling the red LED 11 and improve the current withstand capability of the circuit. Optionally, since there are many lemon LEDs 17, the number of L+ and L- is two each, indicating that each has two pins, which helps to reduce the current on each circuit controlling the lemon LED 17 and improve the current withstand capability of the circuit.

[0079] The second substrate 30 can be a copper substrate, which has excellent thermal conductivity and electrical conductivity.

[0080] Optionally, the LED light source also includes a thermistor disposed on the second substrate 30 for temperature detection and thermal management control.

[0081] In one embodiment, each row of LEDs emits a maximum of four colors. Since each type of LED is controlled independently, to reduce row height, two parallel lines can be arranged in each row. A maximum of four control lines can be arranged in each row on both sides of the first substrate 20, thus limiting the number of LED types to a maximum of four. If more than two parallel lines are arranged in each row, the row height will be too large, resulting in an increased row space, which is detrimental to uniform light mixing and light synthesis. For example, in Figure 1, the fifth row from the top and the fifth row from the bottom have four types of LEDs.

[0082] In one embodiment, the light-emitting surface 21 is circular, which allows light to be scattered more widely, thereby covering a larger area and helping to achieve a wider light distribution in lighting applications and reduce the spotting effect.

[0083] In one embodiment, multiple light-emitting beads cover the light-emitting surface 21, reducing the light blind area and making the light distribution in space more delicate, reducing the light spot phenomenon caused by the sparse light-emitting beads.

[0084] In one embodiment, the LEDs of each color are symmetrically distributed about the row direction passing through the center of the light-emitting surface 21, or the LEDs of each color are symmetrically distributed about the center of the light-emitting surface 21, thereby improving the uniformity of light mixing, improving optical utilization, and reducing the cost of subsequent optical processing.

[0085] In one embodiment, adjacent rows of LED beads are in contact with each other, reducing the spacing between LED beads or chips, making the light distribution in space more uniform and reducing the light spot phenomenon caused by sparse LED beads.

[0086] In one embodiment, two adjacent LED beads in the same row are in contact with each other, reducing the spacing between LED beads or chips, making the light distribution in space more uniform and reducing the light spot phenomenon caused by sparse LED beads.

[0087] In one embodiment, the red LED bead 11 and the green LED chip 12 are located in the same row of LED beads, and the red and green lights overlap more in space, which improves the efficiency and uniformity of light mixing. Red and green are two of the three primary colors, and the two can produce a variety of intermediate hues by mixing, which can present a more diverse and natural color effect.

[0088] In one embodiment, the blue light chip 13 and the lemon light LED bead 17 are located in the same row of light-emitting LED beads, and the light emitted by the two overlaps more in space, which improves the efficiency and uniformity of light mixing, and can mix to produce a variety of intermediate colors, such as green and cyan, so as to present a more diverse and natural color effect.

[0089] In one embodiment, the light colors of two adjacent light-emitting beads in the same circumferential direction of the light-emitting surface 21 are different, so that the edge of the light-emitting surface 21 is mixed into a uniform white light.

[0090] Optionally, among the four consecutive light-emitting LEDs arranged in a circumferential direction, at least three of the light-emitting LEDs have different peak wavelengths, which can further improve the uniformity of light effect and color uniformity, so that the light can be mixed evenly.

[0091] In some embodiments, the red LED bead 11, green LED chip 12, blue LED chip 13, purple LED chip 14, amber LED bead 15, cyan LED chip 16, and lemon LED bead 17 are driven by independent control circuits, i.e., seven control circuits are independently controlled, which can achieve precise control of each color.

[0092] In other embodiments, referring to Figure 1, the red LED 11, green LED 12, blue LED 13, amber LED 15, cyan LED 16, and lemon LED 17 are each driven by independent control circuits. The violet LED 14 and blue LED 13 are driven by the same control circuit, reducing the number and complexity of control circuits. Since violet and blue light have similar wavelengths, they can be turned on or off simultaneously, simplifying system operation. Furthermore, the independent control of the red LED 11, green LED 12, amber LED 15, cyan LED 16, and lemon LED 17 enables rich color combinations and fine-tuned color adjustments.

[0093] Optionally, as shown in Figure 1, the blue light chip 13 and the violet light chip 14 are integrally formed into a single LED, which facilitates the use of a single control circuit, simplifying assembly and control. After the blue light chip 13 and the violet light chip 14 are integrated, the spectral distribution can be further optimized by adjusting their emission ratio, making the light source closer to the sunlight spectrum, improving the color rendering index (Ra), thereby more realistically reproducing the colors of objects and reducing eye strain.

[0094] Optionally, in the integrated LED chips, the ratio of blue light chip 13 to violet light chip 14 is 1:1, which can balance the spectral distribution, making the overall light source spectrum more coherent and smooth, and closer to the spectral characteristics of natural light.

[0095] In some embodiments, referring to Figure 1, all red LED beads 11 are connected in series. The series connection reduces the number and complexity of the circuit, making the wiring simpler and clearer, which helps to reduce manufacturing difficulty and cost. In addition, the series current is the same, which reduces the abnormality of uneven brightness caused by uneven current distribution in the circuit and simplifies the control difficulty.

[0096] In some embodiments, all green LED chips 12 are connected in series, which reduces manufacturing difficulty and cost, and simplifies control. In some embodiments, all blue LED chips 13 and all violet LED chips 14 are connected in series, which reduces manufacturing difficulty and cost, and simplifies control. In some embodiments, amber LED chips 15 are connected in series, which reduces manufacturing difficulty and cost, and simplifies control. In some embodiments, all cyan LED chips 16 are connected in series, which reduces manufacturing difficulty and cost, and simplifies control. In some embodiments, all lemon LED chips 17 are connected in series, which reduces manufacturing difficulty and cost, and simplifies control.

[0097] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An LED light source, wherein: The LED light source includes a red LED bead (11), a green LED chip (12), a blue LED chip (13), a purple LED chip (14), an amber LED bead (15), a cyan LED chip (16), and a lemon LED bead (17). The red LED bead (11) includes a first light-emitting chip and red phosphor covering the first light-emitting chip. The amber LED bead (15) includes a second light-emitting chip and amber phosphor covering the second light-emitting chip. The lemon LED bead (17) includes a third light-emitting chip and lemon phosphor covering the third light-emitting chip.

2. The LED light source of claim 1, wherein, At least one of the first light-emitting chip, the second light-emitting chip and the third light-emitting chip is a blue light chip (13).

3. The LED light source of claim 1, wherein: The LED light source also includes at least one of the following: The peak wavelength of the red phosphor is 610 nm to 650 nm; The peak wavelength of the amber phosphor is 590nm to 620nm; The peak wavelength of the lemon-colored phosphor is 530nm to 550nm.

4. The LED light source of claim 1, wherein: The LED light source also includes at least one of the following: The peak wavelength of the green light chip (12) is 505nm to 535nm; The peak wavelength of the blue light chip (13) is 445nm to 460nm; The peak wavelength of the violet light chip (14) is 390nm to 420nm; The peak wavelength of the cyan light chip (16) is 480nm to 500nm.

5. The LED light source of claim 1, wherein: The peak wavelength of the red phosphor is 637nm; the peak wavelength of the amber phosphor is 606nm; the peak wavelength of the lemon phosphor is 540nm; the peak wavelength of the green light chip (12) is 519nm; the peak wavelength of the blue light chip (13) is 452nm; the peak wavelength of the violet light chip (14) is 408nm; and the peak wavelength of the cyan light chip (16) is 484nm.

6. The LED light source of claim 1, wherein: The red LED bead (11), the green LED chip (12), the blue LED chip (13), the purple LED chip (14), the amber LED bead (15), the cyan LED chip (16), and the lemon LED bead (17) are each driven by an independent control circuit. Alternatively, the red light bead (11), the green light chip (12), the blue light chip (13), the amber light bead (15), the cyan light chip (16), and the lemon light bead (17) are driven by independent control circuits, while the purple light chip (14) and the blue light chip (13) are driven by the same control circuit.

7. The LED light source of claim 1, wherein: When the color temperature of the LED light source is 3200K, the brightness ratio of the red light chip (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light chip (15), the cyan light chip (16), and the lemon light chip (17) is (0.1-0.15):(0.001-0.005):(0.002-0.007):(0.14-0.22):(0.04-0.08):(0.5-0.8).

8. The LED light source of claim 1, wherein: When the color temperature of the LED light source is 5600K, the brightness ratio of the red light bead (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light bead (15), the cyan light chip (16), and the lemon light bead (17) is (0.04-0.08):(0.014-0.022):(0.012-0.017):(0.06-0.1):0.08-0.12):(0.65-0.8).

9. The LED light source of claim 1, wherein: The LED light source includes a first substrate (20), one side of which has a light-emitting surface (21). The light-emitting surface (21) is equipped with multiple rows of light-emitting LED beads, which include the red light LED bead (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light LED bead (15), the cyan light chip (16), and the lemon light LED bead (17).

10. The LED light source of claim 2, wherein: The LED light source includes a first substrate (20), one side of which has a light-emitting surface (21). The light-emitting surface (21) is equipped with multiple rows of light-emitting LED beads, which include the red light LED bead (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light LED bead (15), the cyan light chip (16), and the lemon light LED bead (17).

11. The LED light source of claim 3, wherein: The LED light source includes a first substrate (20), one side of which has a light-emitting surface (21). The light-emitting surface (21) is equipped with multiple rows of light-emitting LED beads, which include the red light LED bead (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light LED bead (15), the cyan light chip (16), and the lemon light LED bead (17).

12. The LED light source of claim 4, wherein: The LED light source includes a first substrate (20), one side of which has a light-emitting surface (21). The light-emitting surface (21) is equipped with multiple rows of light-emitting LED beads, which include the red light LED bead (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light LED bead (15), the cyan light chip (16), and the lemon light LED bead (17).

13. The LED light source of claim 5, wherein: The LED light source includes a first substrate (20), one side of which has a light-emitting surface (21). The light-emitting surface (21) is equipped with multiple rows of light-emitting LED beads, which include the red light LED bead (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light LED bead (15), the cyan light chip (16), and the lemon light LED bead (17).

14. The LED light source of claim 6, wherein: The LED light source includes a first substrate (20), one side of which has a light-emitting surface (21). The light-emitting surface (21) is equipped with multiple rows of light-emitting LED beads, which include the red light LED bead (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light LED bead (15), the cyan light chip (16), and the lemon light LED bead (17).

15. The LED light source of claim 7, wherein: The LED light source includes a first substrate (20), one side of which has a light-emitting surface (21). The light-emitting surface (21) is equipped with multiple rows of light-emitting LED beads, which include the red light LED bead (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light LED bead (15), the cyan light chip (16), and the lemon light LED bead (17).

16. The LED light source of claim 8, wherein: The LED light source includes a first substrate (20), one side of which has a light-emitting surface (21). The light-emitting surface (21) is equipped with multiple rows of light-emitting LED beads, which include the red light LED bead (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light LED bead (15), the cyan light chip (16), and the lemon light LED bead (17).

17. The LED light source of claim 9, wherein: Each row of LED beads has a maximum of four light colors; the light-emitting surface (21) is circular; multiple LED beads cover the light-emitting surface (21); LED beads of each color are symmetrically distributed about the center of the circle passing through the light-emitting surface (21), or LED beads of each color are symmetrically distributed about the center of the circle of the light-emitting surface (21); the red LED bead (11) and the green LED chip (12) are located in the same row of LED beads; the blue LED chip (13) and the lemon LED bead (17) are located in the same row of LED beads; two adjacent LED beads on the same circumferential direction of the light-emitting surface (21) have different light colors.

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