LED light source

Abstract

The invention relates to the technical field of illumination, and provides an LED light source which comprises a red light bead, a green light chip, a blue light chip, a purple light chip, an amber light bead, a green light chip and a lemon light bead. The amber light lamp bead comprises a second light-emitting chip and amber fluorescent powder covering the second light-emitting chip, and the lemon light lamp bead comprises a third light-emitting chip and lemon fluorescent powder covering the third light-emitting chip. Fluorescent powder is excited to emit light, so that the light brightness is improved, the half-peak wave width is increased, and the color continuity is better; chips are adopted to emit light, so that the purity of the color light is ensured, and the high-purity color light output requirement is met; on the basis, through matching and combination of the seven-color light lines, wider color gamut coverage and finer color transition are achieved, spectral distribution closer to sunlight can be generated, and the spectral similarity index (SSI) of the sunlight can be measured to reach 90 or above.

Description

Technical Field

[0001] The invention relates to the technical field of lighting, and in particular to an LED light source. Background Art

[0002] LED light sources are widely used in home lighting, commercial lighting, stage lighting, film and television shooting, theater studio lighting, museum lighting, medical lighting, plant growth lighting, etc. At present, people's demand for color richness, color saturation and color accuracy of light sources is increasing. In this context, existing LED light sources are required to achieve wider color gamut coverage and more delicate color transition. Summary of the invention

[0003] The object of the present invention is to provide an LED light source, aiming to solve the technical problem that the color gamut coverage and color transition of the existing LED light source need to be improved.

[0004] The present application provides an LED light source, which includes red light beads, green light chips, blue light chips, purple light chips, amber light beads, cyan light chips and lemon light beads. The red light beads include a first light-emitting chip and a red phosphor covering the first light-emitting chip, the amber light beads include a second light-emitting chip and an amber phosphor covering the second light-emitting chip, and the lemon light beads include a third light-emitting chip and a lemon phosphor covering the third light-emitting chip.

[0005] 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.

[0006] In one embodiment, the peak wavelength of the red phosphor is 610nm-650nm.

[0007] In one embodiment, the peak wavelength of the amber phosphor is 590nm to 620nm.

[0008] In one embodiment, the peak wavelength of the lemon-colored phosphor is 530 nm to 550 nm.

[0009] In one of the embodiments, the peak wavelength of the green light chip is 505nm-535nm.

[0010] In one embodiment, the peak wavelength of the blue light chip is 445nm-460nm.

[0011] In one of the embodiments, the peak wavelength of the purple light chip is 390nm to 420nm.

[0012] In one embodiment, the peak wavelength of the cyan chip is 480nm to 500nm.

[0013] In one embodiment, 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 is 519nm; the peak wavelength of the blue light chip is 452nm; the peak wavelength of the purple light chip is 408nm; and the peak wavelength of the cyan chip is 484nm.

[0014] In one embodiment, the red light bead, the green light chip, the blue light chip, the purple light chip, the amber light bead, the cyan light chip and the lemon light bead are driven by independent control circuits respectively.

[0015] In one embodiment, the red light bead, the green light chip, the blue light chip, the amber light bead, the cyan light chip and the lemon light bead are driven by independent control circuits respectively, and the purple light chip and the blue light chip are driven by the same control circuit.

[0016] In one embodiment, when the color temperature of the LED light source is 3200K, the brightness ratio of the red light bead, the green light chip, the blue light chip, the purple light chip, the amber light bead, the cyan light chip, and the lemon light 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.

[0017] In one embodiment, when the color temperature of the LED light source is 5600K, the brightness ratio of the red light bead, the green light chip, the blue light chip, the purple light chip, the amber light bead, the cyan light chip, and the lemon light 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.

[0018] In one embodiment, the LED light source includes a first substrate, one side of the first substrate has a light-emitting surface, the light-emitting surface is mounted with light-emitting lamp beads distributed in multiple rows, the light-emitting lamp beads include the red light beads, the green light chip, the blue light chip, the purple light chip, the amber light beads, the cyan light chip and the lemon light beads.

[0019] In one embodiment, the light colors of each row of the light emitting lamp beads are at most four.

[0020] In one embodiment, the light emitting surface is circular.

[0021] In one embodiment, a plurality of the light emitting lamp beads cover the entire light emitting surface.

[0022] In one embodiment, the light emitting lamp beads of each color are symmetrically distributed about a row direction passing through the center of the circle of the light emitting surface, or the light emitting lamp beads of each color are symmetrically distributed about the center of the circle of the light emitting surface.

[0023] In one embodiment, the red light lamp beads and the green light chips are located in the same row of light-emitting lamp beads.

[0024] In one embodiment, the blue light chip and the lemon light lamp beads are located in the same row of the light-emitting lamp beads.

[0025] In one of the embodiments, the light colors of two adjacent light emitting lamp beads in the same circumferential direction of the light emitting surface are different.

[0026] The beneficial effects of the LED light source provided by the present invention are as follows: compared with the traditional RGB three-color light source, the LED light source provided by the present application includes, in addition to red light beads, green light chips and blue light chips, purple light chips, amber light beads, cyan light chips and lemon light beads; wherein, the red light beads, amber light beads and lemon light beads use excited fluorescent powder to emit light, which is beneficial to improve the brightness of the light and increase the half-peak wave width, so that the synthesized white light has a wider color gamut, better color continuity, and smoother transitions between colors, avoiding the problem of abnormal prominence of red light, cyan light or lemon light in the spectrum; the blue light chip, cyan light chip, green light chip and purple light chip use chip emission to ensure that these color lights The purity of the line meets the requirements of high-purity color light output. If green light is used to excite phosphor to emit light, it will cause the half-peak wave width to increase, the light to become whitish, and the color rendering requirements of the color light to be reduced; based on this, through the combination of seven colors of light, the color mutation and fault phenomenon are reduced, so that the LED light source can present a more natural and smooth color change in display and lighting applications, and can produce a spectral distribution closer to sunlight. The measured spectral similarity index (SSI) is above 90, achieving a wider color gamut coverage and more delicate color transition, solving the technical problems of the existing LED light source in color gamut coverage and color transition that need to be improved, and significantly improving the accuracy of color reproduction and detail expression. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 A schematic diagram of the structure of an LED light source provided by an embodiment of the present invention;

[0029] Figure 2 A spectrum combination diagram of the light-emitting lamp beads of the LED light source provided by the embodiment of the present invention;

[0030] Figure 3 is a spectrum diagram of the LED light source provided in the embodiment when the color temperature is 3200K;

[0031] Figure 4 This is a spectrum diagram of the LED light source provided by the embodiment when the color temperature is 5600K.

[0032] Among them, the reference numerals in the figure are:

[0033] 11. Red light beads; 12. Green light chips; 13. Blue light chips; 14. Purple light chips; 15. Amber light beads; 16. Cyan light chips; 17. Lemon light beads;

[0034] 20. first substrate; 21. light emitting surface;

[0035] 30. A second substrate. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] Reference throughout the 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 present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0038] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Combination Figure 1 and Figure 2 The present application provides an LED light source. The LED light source includes a red light bead 11, a green light chip 12, a blue light chip 13, a purple light chip 14, an amber light bead 15, a cyan light chip 16 and a lemon light bead 17. Figure 1 and Figure 2 In the figure, R represents a red light bead 11, G represents a green light chip 12, B represents a blue light chip 13, A represents an amber light bead 15, C represents a cyan light chip 16, and L represents a lemon light bead 17. In a possible example, the blue light chip 13 and the purple light chip 14 are driven by the same control circuit, for example Figure 1 B in the figure represents the blue light chip 13 and the purple light chip 14 which are packaged as one.

[0042] In this embodiment, the blue chip 13, the cyan chip 16, the green chip 12 and the purple chip 14 use chip light emission, which can accurately emit light of a specific wavelength, ensuring the high purity of these color lights, and meeting the high-purity color light output requirements of the LED light source. In addition, the wavelength range of blue light, cyan light, green light and purple light is small. If the light is emitted by exciting phosphors, its half-peak width will be expanded, resulting in confusion with adjacent wavelength color lights, reducing its purity, and reducing the color rendering effect of the color light of the LED light source. Specifically, if green light is emitted by exciting phosphors, the half-peak width will increase, the color of the light will be whitish, and the color rendering index of the color light will be reduced.

[0043] In this embodiment, the red light bead 11 includes a first light-emitting chip and a red phosphor covering the first light-emitting chip, the amber light bead 15 includes a second light-emitting chip and an amber phosphor covering the second light-emitting chip, and the lemon light bead 17 includes a third light-emitting chip and a lemon phosphor covering the third light-emitting chip. The red light bead 11, the amber light bead 15 and the lemon light bead 17 use the excited phosphor to emit light, which is beneficial to improve the brightness of the light and increase the half-peak wave width, so that the synthesized white light has a wider color gamut, better color continuity, and a smoother transition between colors, avoiding the abnormal prominence of the peaks of red light, cyan light or lemon light in the spectrum, resulting in abrupt and unnatural color transitions. Specifically, the wavelength range of red light is large, and increasing its half-peak wave width still falls within the wavelength range of red light. Specifically, although the amber light and lemon light use the phosphor to excite and reduce the purity of the light, they account for a small proportion of the color light, and increasing their half-peak wave width is beneficial to the improvement of color saturation. In addition, by optimizing the formula and ratio of phosphors, more efficient luminescence effects can be achieved, thereby reducing overall costs.

[0044] Compared with the traditional RGB three-color light source, the LED light source provided in the present application includes not only red light beads 11, green light chips 12 and blue light chips 13, but also purple light chips 14, amber light beads 15, cyan light chips 16 and lemon light beads 17; based on this, through the combination of seven colors of light, the LED light source can present a more natural and smooth color change 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 above 90, achieving a wider color gamut coverage and more delicate color transition, significantly improving the accuracy of color reproduction and detail expression.

[0045] 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 to reduce the types of prepared materials and reduce the frequency of replacing different types of chips during the production process, thereby reducing the cost and time of production line adjustment.

[0046] Optionally, one of the first light-emitting chip, the second light-emitting chip, and the third light-emitting chip is a blue light chip 13. Optionally, two of the first light-emitting chip, the second light-emitting chip, and the third light-emitting chip are blue light chips 13. Optionally, the first light-emitting chip, the second light-emitting chip, and the third light-emitting chip are all blue light chips 13, which greatly reduces the types of light-emitting chips and further reduces the types of chip stock.

[0047] In some embodiments, in combination Figure 2 , the peak wavelength of the red phosphor is 610nm~650nm. Within this wavelength range, the red phosphor can excite pure and bright red light, and the light parameter index is excellent. If the peak wavelength of the red phosphor is lower than 610nm, the light color is impure and the light parameter index does not meet the standard. If the peak wavelength of the red phosphor is higher than 650nm, the light color is dim, and the number or power of the red light beads 11 needs to be increased.

[0048] In one embodiment, in combination Figure 2 The peak wavelength of the red phosphor is 637nm. The red phosphor with a peak wavelength of 637nm can stimulate pure and bright red light with high color saturation and good light stability, which helps to improve the color rendering index (CRI) of the LED light source.

[0049] Specifically, combined Figure 2 The spectrum of the red phosphor includes a first band with a wavelength less than 620nm and a wavelength greater than 658nm. The light intensity of the first band (see Figure 2 The vertical coordinate) is less than or equal to 80% of the light intensity of the peak wavelength of 637nm of the red phosphor, thereby limiting the light intensity of the non-peak wavelength of the red light, optimizing the spectral distribution of the red light, reducing stray light, making the light purer and the color more saturated. On the one hand, it is beneficial to improve the TLCI index, and on the other hand, it is beneficial to concentrate the energy at the peak wavelength and reduce energy loss.

[0050] In some embodiments, in combination Figure 2 The peak wavelength of the amber phosphor is 590nm to 620nm. The amber phosphor within this peak wavelength range can emit pure and warm amber light with high color saturation and excellent light parameter indicators. If the peak wavelength of the amber phosphor is less than 590nm or greater than 620nm, the light purity is insufficient and the power of the amber light bead 15 is increased.

[0051] In one embodiment, in combination Figure 2 The peak wavelength of amber phosphor is 606nm. Amber phosphor with a peak wavelength of 606nm can stimulate pure and bright amber light with high light stability and high color saturation.

[0052] Specifically, combined Figure 2 The spectrum of the amber phosphor includes a second band with a wavelength less than 583nm and a wavelength greater than 630nm. The light intensity of the second band is less than or equal to 80% of the light intensity of 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 have a smooth transition and delicate light. 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.

[0053] In some embodiments, in combination Figure 2 The peak wavelength of lemon-colored phosphor is 530nm~550nm, which can stimulate bright and pure lemon-colored light with high color saturation, improve color richness and accuracy, and have excellent light parameter indicators. If the peak wavelength of lemon-colored phosphor is less than 530nm or greater than 550nm, the light purity is insufficient and the power should be increased.

[0054] In one embodiment, in combination Figure 2 The peak wavelength of the lemon-colored phosphor is 540nm, which can stimulate bright and pure lemon-colored light with high color saturation and high light stability.

[0055] Specifically, combined Figure 2 The spectrum of the lemon-colored phosphor includes a third band with a wavelength less than 519nm and a wavelength greater than 583nm. The light intensity of the third band is less than or equal to 80% of the light intensity of the peak wavelength of 540nm 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 delicate; on the other hand, reasonable control of the light intensity of the third band can optimize the luminous efficiency of the lemon-colored phosphor while ensuring that the light color is purer.

[0056] In some embodiments, in combination Figure 2 The peak wavelength of the green light chip 12 is 505nm-535nm, which makes the green light generated purer, the color more saturated, the light parameter index is excellent, and the luminous efficiency is optimized.

[0057] In one embodiment, in combination Figure 2 The peak wavelength of the green light chip 12 is 519nm, which can stimulate bright and pure green light with high color saturation and good light stability.

[0058] Specifically, combined Figure 2The spectrum of the green light chip 12 includes a fourth band with a wavelength less than 511nm and a wavelength 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 of 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.

[0059] In some embodiments, in combination Figure 2 The peak wavelength of the blue light chip 13 is 445nm~460nm, which can emit bright and unique blue, with high color saturation and excellent light parameter indicators.

[0060] In one embodiment, the peak wavelength of the blue light chip 13 is 452 nm, and it can emit bright and pure blue light, has high luminous efficiency, and has good light stability.

[0061] Specifically, the light intensity of the peak wavelength of 452nm of the blue light chip 13 is 85% to 90% of the light intensity of the peak wavelength of the purple light chip 14, so that the transition between blue light and purple light is smooth and natural. Since the luminous brightness of the blue light chip 13 is higher than the luminous brightness of the purple light chip 14 under the same current, the brightness of the blue light is reduced by limiting the light intensity of the peak wavelength of the blue light chip 13, so that the proportion of blue light in the spectrum is balanced (see Figure 3 and Figure 4 ). Specifically, the brightness ratio of the blue light chip 13 and the purple light chip 14 is 9:1.

[0062] Specifically, combined Figure 2 The spectrum of the blue light chip 13 includes a fifth band with a wavelength less than 450nm and a wavelength greater than 455nm, and the light intensity of the fifth band is less than or equal to 80% of the light intensity of the peak wavelength of the purple light chip 14. By controlling the light intensity of the fifth band, it is distinguished from the purple light, the stray light of the blue light is reduced, the purity of the blue light and the purple light is improved, the spectrum characteristics are optimized, and the luminous efficiency is improved.

[0063] 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 can be combined to achieve a wider spectrum coverage by using three chips with different peak wavelengths, thereby significantly improving the spectral similarity index (SSI) index. For example, when the target color temperature is 3200K, the SSI reaches more than 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 photography fill light, so that the photographic works have more realistic color reproduction and higher detail expression. At the same time, a spectral distribution closer to natural light can reduce eye fatigue and discomfort and improve people's visual comfort.

[0064] 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 pure color, and its ratio is larger, which is conducive to achieving a larger color temperature and expanding the color temperature range. The range of the power ratio is conducive to flexibly adjusting the color temperature, brightness and spectral distribution of the blue light chip 13, which is conducive to a wider spectrum coverage of the light source, while maintaining spectral characteristics similar to natural light, thereby improving the spectral similarity index of the light source, optimizing the color rendering of the light source, and natural light can enhance visual comfort.

[0065] In this embodiment, the peak wavelength of the light emitted by the blue light chip 13 is between 445nm and 460nm. Blue light with a shorter wavelength (close to 445nm) is suitable for application scenarios with high brightness and high contrast, while blue light with a longer wavelength (close to 460nm) is suitable for application scenarios with soft 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 arranged in series to achieve a peak wavelength of 452nm for the blue light chip 13.

[0066] In one embodiment, the peak wavelength of the first chip is 440nm, the peak wavelength of the second chip is 450nm, and the peak wavelength of the third chip is 460nm. Since the wavelength 452nm is closer to the center of pure blue, the peak wavelength 450nm of the second chip is selected, and the first chip and the third chip respectively use a shorter wavelength (440nm) and a longer wavelength (460nm), so that the spectrum distribution of the entire blue light chip 13 is more extensive and uniform.

[0067] In some embodiments, in combination Figure 2 The peak wavelength of the purple light chip 14 is 390nm~420nm, which makes the generated purple light purer, more saturated in color, and has excellent light parameter indicators.

[0068] In one embodiment, the peak wavelength of the purple light chip 14 is 408 nm, and it can emit bright and pure purple light with high color saturation and high light stability.

[0069] Specifically, combined Figure 2 The spectrum of the purple light chip 14 includes a sixth band with a wavelength less than 403nm and a wavelength 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 408nm of the purple light chip 14. Based on this, on the one hand, the sixth band can broaden the spectrum range, making the light emitted by the purple light chip 14 richer in color and more delicate; on the other hand, reasonable control of the light intensity of the sixth band can optimize the luminous efficiency of the purple light chip 14 while ensuring that the light color is purer.

[0070] In some embodiments, in combination Figure 2 The peak wavelength of the cyan chip 16 is 480nm to 500nm, so that the cyan chip 16 can emit bright and stable cyan light with high color saturation.

[0071] In one embodiment, the peak wavelength of the cyan chip 16 is 484 nm, and it can emit bright and pure cyan light. The peak wavelength of 484 nm makes the cyan chip 16 have better light stability.

[0072] Specifically, combined Figure 2 The spectrum of the cyan chip 16 includes a seventh band with a wavelength less than 478nm and a wavelength greater than 491nm, and the light intensity of the seventh band is less than or equal to 80% of the light intensity of the peak wavelength 484nm 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.

[0073] Among them, the wavelengths of the blue light chip 13 and the purple light chip 14 are similar, and the two play basically the same role in color temperature adjustment and synthesizing white light. Regardless of whether the blue light chip 13 and the purple 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 purple light chip 14 are taken as a whole to adjust the color temperature of the LED light source.

[0074] In some embodiments, in combination Figure 1 and Figure 3When the color temperature of the LED light source is 3200K, 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 (0.1-0.15): (0.001-0.005): (0.002-0.007): (0.14-0.22): (0.04-0.08): (0.5-0.8). By accurately controlling the brightness ratio of the beads / chips of various colors, the color rendering index of the LED light source can be significantly improved, and its spectral similarity index (SSI) reaches more than 90.

[0075] In some embodiments, in combination Figure 1 and Figure 4 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). By accurately controlling the brightness ratio of the beads / chips of various colors, the color rendering index of the LED light source can be significantly improved, and its spectral similarity index (SSI) reaches more than 90.

[0076] In some embodiments, in combination Figure 1 The light-emitting lamp beads include red light beads 11, green light chips 12, blue light chips 13, purple light chips 14, amber light beads 15, cyan light chips 16 and lemon light beads 17. The LED light source includes a first substrate 20, one side of the first substrate 20 has a light-emitting surface 21, and the light-emitting surface 21 is installed with light-emitting lamp beads distributed in multiple rows, which is beneficial to saving the space occupied by the light-emitting lamp beads and facilitating the miniaturization design of the light source module.

[0077] Optionally, the first substrate 20 may be a metal substrate or a ceramic substrate.

[0078] In one embodiment, the light-emitting lamp bead can be one or more of a flip chip, a flip CSP, and a vertical chip. For example, a flip chip can provide better thermal management capabilities because the LED chip is directly mounted on the first substrate 20 and can conduct heat more effectively. The flip CSP technology directly encapsulates the LED chip in a very small package, greatly reducing the volume and weight of the light source module. For another example, the vertical chip makes the light emission direction of the LED chip perpendicular to the first substrate 20, which is beneficial to the beam control and reflection management in the optical design. Therefore, the use of flip chips, flip CSPs or vertical chips as the packaging structure of LED lamp beads can be optimized according to the thermal management requirements, size restrictions and optical design requirements of specific applications to achieve higher light efficiency, better thermal management and more suitable optical properties, thereby improving the performance and application effect of the light source.

[0079] In some embodiments, in combination Figure 1 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 the heat generated during the operation of the light-emitting lamp beads can be transferred to the second substrate 30 to achieve better thermal management. The second substrate 30 can be electrically connected to the outside through the wiring socket so that an external power source can supply power to the light source.

[0080] Specifically, Figure 1 R+ represents the wiring socket for the positive pole of the red light bead 11, R- represents the wiring socket for the negative pole of the red light bead 11, G+ represents the wiring socket for the positive pole of the green light chip 12, G- represents the wiring socket for the negative pole of the green light chip 12, and so on. Optionally, since the number of red light beads 11 is large, the number of R+ and R- are both 2, indicating that there are 2 pins, which is conducive to reducing the current on each circuit that controls the red light bead 11 and improving the current resistance of the circuit. Optionally, since the number of lemon light beads 17 is large, the number of L+ and L- are both 2, indicating that there are 2 pins, which is conducive to reducing the current on each circuit that controls the lemon light bead 17 and improving the current resistance of the circuit.

[0081] The second substrate 30 may be a copper substrate, which has excellent thermal conductivity and electrical conductivity.

[0082] Optionally, the LED light source further includes a thermistor disposed on the second substrate 30 for realizing temperature detection and thermal management control.

[0083] In one embodiment, each row of light-emitting lamp beads has at most four colors of light. Since each type of lamp bead is controlled independently, in order to reduce the row height, two parallel lines can be set in each row space, and at most four control lines are set in each row space on the front and back sides of the first substrate 20, which limits the number of light-emitting lamp beads to at most four. If more than two parallel lines are set in each row, the row height will be too large, resulting in an increase in the space of each row, which is not conducive to uniform light mixing and light synthesis. For example, Figure 1 There are four types of light-emitting lamp beads in the 5th row from the positive end and the 5th row from the bottom.

[0084] In one embodiment, the light emitting surface 21 is circular, so that the light can be scattered more widely, thereby covering a larger area, which helps to achieve a wider light distribution and reduce the spot effect in lighting applications.

[0085] In one of the embodiments, a plurality of light-emitting lamp beads are distributed over the light-emitting surface 21, which reduces blind areas of illumination, makes the distribution of light in space more delicate, and reduces the light spot phenomenon caused by sparse light-emitting lamp beads.

[0086] In one embodiment, the light-emitting lamp beads of each color are symmetrically distributed about the row direction passing through the center of the circle of the light-emitting surface 21, or the light-emitting lamp beads of each color are symmetrically distributed about the center of the circle of the light-emitting surface 21, so as to improve the uniformity of mixed light, thereby improving optical utilization and reducing the cost of subsequent optical processing.

[0087] In one of the embodiments, two adjacent rows of light-emitting lamp beads are in contact with each other, which reduces the interval between the lamp beads or chips, making the distribution of light in the space more uniform and reducing the light spot phenomenon caused by sparse lamp beads.

[0088] In one embodiment, two adjacent light-emitting lamp beads in the same row are in contact with each other, which reduces the interval between the lamp beads or chips, making the distribution of light in space more uniform and reducing the light spot phenomenon caused by sparse lamp beads.

[0089] In one of the embodiments, the red light beads 11 and the green light chips 12 are located in the same row of light-emitting lamp beads, and the red light and the green light overlap more in space, thereby improving 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 tones by mixing, which can present a more diverse and natural color effect.

[0090] In one embodiment, the blue light chip 13 and the lemon light lamp bead 17 are located in the same row of light-emitting lamp beads, and the light emitted by the two lights overlap more in space, thereby improving the efficiency and uniformity of light mixing, and can be mixed to produce a variety of intermediate tones, such as green, cyan, etc., which can present a more diverse and natural color effect.

[0091] In one embodiment, two adjacent light emitting lamp beads in the same circumferential direction of the light emitting surface 21 emit light of different colors, so that the edge of the light emitting surface 21 is mixed into uniform white light.

[0092] Optionally, among four consecutive light-emitting lamp beads arranged along the circumferential direction, peak wavelengths of at least three light-emitting lamp beads are different from each other, thereby further improving the uniformity of light effect and color, so that the light can be mixed evenly.

[0093] In some embodiments, the red light bead 11, green light chip 12, blue light chip 13, purple light chip 14, amber light bead 15, cyan light chip 16 and lemon light bead 17 are driven by independent control circuits respectively, that is, seven control circuits are independently controlled, which can achieve precise control of each color.

[0094] In other embodiments, in combination Figure 1 , 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. The purple light chip 14 and the blue light chip 13 are driven by the same control circuit, which reduces the number and complexity of the control circuits. The wavelengths of purple light and blue light are similar, so they can be turned on or off at the same time, simplifying the operation of the system. In addition, the red light bead 11, the green light chip 12, the amber light bead 15, the cyan light chip 16 and the lemon light bead 17 are controlled independently to achieve rich color combinations and fine color adjustment.

[0095] Optionally, combined Figure 1 The blue chip 13 and the purple chip 14 are integrally formed into one lamp bead, which is conducive to being driven by the same control circuit, simplifying the difficulty of assembly and control. After the blue chip 13 and the purple chip 14 are integrated, the spectral distribution can be further optimized by adjusting the light emission ratio of the two, making the light source closer to the sunlight spectrum and improving the color rendering index (Ra), thereby more realistically restoring the color of the object and reducing the burden on the eyes.

[0096] Optionally, in the integrated lamp bead, the number ratio of the blue light chip 13 to the purple light chip 14 is 1:1, which can balance the spectral distribution, making the spectrum of the overall light source more coherent and smoother, and closer to the spectral characteristics of natural light.

[0097] In some embodiments, in combination Figure 1 All red light beads 11 are arranged in series. The series arrangement reduces the number and complexity of lines in the circuit, makes the wiring more concise and clear, helps 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 current distribution in the circuit and simplifies the difficulty of regulation.

[0098] In some embodiments, all green light chips 12 are arranged in series, which helps to reduce the manufacturing difficulty and manufacturing cost, and simplify the difficulty of regulation. In some embodiments, all blue light chips 13 and all purple light chips 14 are arranged in series, which helps to reduce the manufacturing difficulty and manufacturing cost, and simplify the difficulty of regulation. In some embodiments, amber light beads 15 are arranged in series, which helps to reduce the manufacturing difficulty and manufacturing cost, and simplify the difficulty of regulation. In some embodiments, all cyan light chips 16 are arranged in series, which helps to reduce the manufacturing difficulty and manufacturing cost, and simplify the difficulty of regulation. In some embodiments, all lemon light beads 17 are arranged in series, which helps to reduce the manufacturing difficulty and manufacturing cost, and simplify the difficulty of regulation.

[0099] The above description is only 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 in the protection scope of the present invention.

Claims

1. An LED light source, characterized in that: The LED light source comprises a red light bead (11), a green light chip (12), a blue light chip (13), a purple light chip (14), an amber light bead (15), a cyan light chip (16) and a lemon light bead (17); the red light bead (11) comprises a first light-emitting chip and a red fluorescent powder covering the first light-emitting chip; the amber light bead (15) comprises a second light-emitting chip and an amber fluorescent powder covering the second light-emitting chip; and the lemon light bead (17) comprises a third light-emitting chip and a lemon fluorescent powder covering the third light-emitting chip.

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

4. The LED light source according to claim 1, characterized in that: 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-460nm; The peak wavelength of the purple light chip (14) is 390nm to 420nm; The peak wavelength of the cyan chip (16) is 480nm to 500nm.

5. The LED light source according to claim 1, characterized in that: 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 (12) is 519 nm; the peak wavelength of the blue light chip (13) is 452 nm; the peak wavelength of the purple light chip (14) is 408 nm; and the peak wavelength of the cyan light chip (16) is 484 nm.

6. The LED light source according to claim 1, characterized in that: 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) are driven respectively by independent control circuits; 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 respectively by independent control circuits, and the purple light chip (14) and the blue light chip (13) are driven by the same control circuit.

7. The LED light source according to claim 1, characterized in that: When the color temperature of the LED light source is 3200K, 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 (0.1-0.15):(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 according to claim 1, characterized in that: When the color temperature of the LED light source is 5600K, the brightness ratios 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) 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).

9. The LED light source according to any one of claims 1 to 8, characterized in that: The LED light source comprises a first substrate (20), one side of the first substrate (20) comprises a light-emitting surface (21), the light-emitting surface (21) is mounted with light-emitting lamp beads distributed in multiple rows, the light-emitting lamp beads comprising the red light lamp beads (11), the green light chip (12), the blue light chip (13), the purple light chip (14), the amber light lamp beads (15), the cyan light chip (16) and the lemon light lamp beads (17).

10. The LED light source according to claim 9, characterized in that: Each row of the light emitting lamp beads has at most four colors of light; the light emitting surface (21) is circular; a plurality of the light emitting lamp beads cover the entire light emitting surface (21); the light emitting lamp beads of each color are symmetrically distributed about a row direction passing through the center of a circle of the light emitting surface (21), or the light emitting lamp beads of each color are symmetrically distributed about the center of a circle of the light emitting surface (21); the red light lamp beads (11) and the green light chips (12) are located in the same row of the light emitting lamp beads; the blue light chips (13) and the lemon light lamp beads (17) are located in the same row of the light emitting lamp beads; and the light colors of two adjacent light emitting lamp beads in the same circumferential direction of the light emitting surface (21) are different.

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