Light source module, lighting system and lamp

Abstract

The light source module comprises a first light-emitting unit, a second light-emitting unit, a third light-emitting unit and a fourth light-emitting unit which are electrically independent from one another, and light emitted by the light-emitting units is mixed to form white light. By selecting the light color and spectral characteristics of the light emitting unit, the white light color temperature coverage range obtained by the light source module is wide, the color deviation Duv value is smaller than 0.003, and therefore the white light color deviation problem is solved. Meanwhile, the white light spectrum of the light source module simulates a target spectrum, and when the relative color temperature is more than 4000 K, the target spectrum is a sunlight spectrum; and when the relative color temperature is lower than 4000 K, the target spectrum is a blackbody radiation spectrum. Due to the fact that the spectrum simulates sunlight or a black body radiation spectrum, the obtained white light spectrum has good spectrum similarity and color rendering, the light color of the white light of the module is closer to sunlight, the light quality performance of the white light source is obviously superior to that of an existing double-color-temperature light mixing white light source, and the module is more suitable for the field of general illumination.

Description

Technical Field

[0001] The invention relates to a light source module, a lighting system and a lamp. Background Art

[0002] In the field of lighting, due to the low power consumption and high light efficiency of light-emitting diodes (LEDs), they have rapidly replaced traditional light sources and have been applied to various types of lighting equipment, such as indoor and outdoor lighting, smart lighting, plant lighting, automotive lighting, indoor and outdoor display lighting, etc. With the continuous improvement and improvement of the performance and cost of LED lighting, the market penetration rate has also been increased synchronously. At the same time, users have higher requirements for the light quality of lighting. From the perspective of color rendering, from the earliest color rendering index of 70, to the color rendering index of 80, 90, and even 95, 97 or above, and from the trend of the spectrum, it is gradually approaching the natural light spectrum, supplementing or eliminating specific visible light bands to improve its fit with the natural light spectrum, and superimposing dual color temperature dimming to achieve lighting scenes in different color temperature ranges, so as to form a dimming and color-adjusting lighting product that can take into account high light quality.

[0003] However, the adjustable color temperature range of the general single-color temperature or dual-color temperature white light dimming method is limited and is determined by the color temperature of the two white light chips used. In addition, since the dimming trajectory is a two-point connecting line of the color coordinate points of the two color temperatures on the CIE 1931 chromaticity diagram, when adjusted to the intermediate color temperature, due to the large gap between its color point and the black body trajectory line, its light color and spectrum have a relatively obvious deviation from the standard light source with the same color temperature. Moreover, the light color quality of the intermediate color temperature will also be sacrificed, and there is a relatively large gap compared with the full spectrum of single white light with the same color temperature, especially R9 and R12 in the color rendering index. Usually, in order to improve the problem of large color deviation of light at intermediate color temperature, two white light chips with a small color temperature difference can be used for dimming or the color point specifications of the two white light chips can be adjusted to ensure that when the color temperature is adjusted to the intermediate color temperature, the color point falls on the target value to reduce the color deviation. These two methods, one is that the adjustable color temperature range of white light is further reduced, and the other is that although the light color quality of the intermediate color temperature is guaranteed, the light color effect of the highest and lowest color temperatures is also sacrificed. Regardless of the specifications of the white light spectrum used, that is, a full-spectrum white light chip is used, the above-mentioned problems of limited adjustable color temperature range and large color deviation leading to reduced light quality exist.

[0004] In addition, in order to further expand the overall white light color temperature range, generally, red, green, and blue primary colors are superimposed on the original single-color temperature or two-color temperature white light chips for dimming and color adjustment, that is, the RGBW or RGBCW multi-color mixing method. And this mixing method is as follows: when the target color temperature value is within the single-color temperature or two-color temperature white light range, the main body participating in the mixing is these white light chips. When the target color temperature value exceeds the range, red, green, and blue primary colors are used for mixing or in a way of compensating colors to obtain the white light of the required target color temperature. However, no matter which method is adopted, the white light obtained by this type of mixing can only be guaranteed in terms of color rendering within the color temperature range covered by the existing white light chips. When exceeding this range, since the light-emitting diodes used for the three primary colors have a single-wavelength LED chip as the main component unit, and the full-width half-maximum (FWHM) of each single color is relatively narrow, the spectral continuity of the white light obtained by their participation in mixing is poor, and it cannot ensure that the color rendering index outside the color temperature range of the white light chips is still at a relatively high level.

[0005] With the improvement of people's living standards, the demand for lighting is more diverse. How to provide a lighting device that can completely imitate the color temperature change of outdoor natural light and has a light quality comparable to natural light has become an urgent problem to be solved. Summary of the Invention

[0006] The purpose of the present invention is to solve the above problems and propose a multi-color light source module, a lighting system, and a lamp with adjustable white light color temperature and capable of realizing full-spectrum white light.

[0007] To achieve the above functions, the technical solution adopted in this application is to provide a light source module, which is characterized in that it includes a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and a fourth light-emitting unit that are electrically independent of each other;

[0008] The first light-emitting unit includes a first light source, a first encapsulation body covering the first light source, and a first phosphor. The light output of the first light-emitting unit includes at least two spectral emission peaks. The first peak wavelength is located at 445 - 460 nm, and the second peak wavelength is located at 480 - 520 nm, and the spectral intensity at the second peak wavelength is 100 - 150% of the spectral intensity at the first peak wavelength. Its light color is blue-green light located within the quadrilateral area enclosed by four points A1(0.18, 0.39), A2(0.22, 0.44), A3(0.25, 0.39), and A4(0.22, 0.35) on the 1931 CIE chromaticity diagram.

[0009] The second light-emitting unit includes a second light source, a second encapsulant covering the second light source, and a second phosphor. The light emitted by the second light-emitting unit includes at least two spectral emission peaks. The first peak wavelength is located at 585 - 620 nm, the second peak wavelength is located at 550 - 580 nm, and the spectral intensity at the second peak wavelength is 40 - 70% of the spectral intensity at the first peak wavelength. The spectral half-width is 80 - 120 nm, and its light color is yellowish-orange light located within the quadrilateral region enclosed by four points B1(0.46, 0.47), B2(0.48, 0.51), B3(0.53, 0.46), and B4(0.49, 0.44) on the 1931 CIE chromaticity diagram;

[0010] The third light-emitting unit includes a third light source, a third encapsulant covering the third light source, and a third phosphor. The light emitted by the third light-emitting unit includes at least two spectral emission peaks. The first peak wavelength is located at 630 - 680 nm, the second peak wavelength is located at 550 - 580 nm, and the spectral intensity at the second peak wavelength is 0 - 40% of the spectral intensity at the first peak wavelength. The spectral half-width is 70 - 100 nm, and its light color is orange-red light located within the quadrilateral region enclosed by four points C1(0.60, 0.36), C2(0.63, 0.37), C3(0.71, 0.29), and C4(0.67, 0.29) on the 1931 CIE chromaticity diagram;

[0011] The fourth light-emitting unit includes a fourth light source and a fourth encapsulant covering the fourth light source. The light emitted by the fourth light-emitting unit includes at least two spectral emission peaks. The first peak wavelength is located at 430 - 445 nm, the second peak wavelength is located at 460 - 480 nm, and the spectral intensity at the second peak wavelength is 40 - 80% of the spectral intensity at the first peak wavelength.

[0012] Further, the blue light content of the second light-emitting unit is less than 10%, and the blue light content of the third light-emitting unit is less than 5%.

[0013] Further, the fourth light source is an LED chip combination, including two or more blue LED chips with different peak wavelengths. The peak wavelength of the blue LED chips is 430 - 475 nm, and the peak wavelength difference between the two or more blue LED chips with different peak wavelengths is greater than or equal to 10 nm.

[0014] Further, the peak wavelength of the first blue LED chip is 430 - 445 nm; the peak wavelength of the second blue LED chip is 445 - 460 nm; the peak wavelength of the third blue LED chip is 460 - 475 nm. The difference in peak wavelength between any two of the first blue LED chip, the second blue LED chip, and the third blue LED chip is greater than or equal to 10 nm. The fourth light source includes the first blue LED chip and the third blue LED chip, and the first light source, the second light source, and the third light source are the second blue LED chips.

[0015] Further, the first phosphor includes at least one blue-green phosphor with a peak wavelength in the range of 485 - 515 nm and at least one yellow-green phosphor with a peak wavelength in the range of 500 - 580 nm. The blue-green phosphor is (Ba,Sr)Si 2 N 2 O 2 :Eu; the yellow-green phosphor is (Lu,Yb,Tb) 3 (Al, Ga) 5 O 12 :Ce, Ga-Y 3 Al 5 O 12 :Ce, Y 3 (Al,Ga) 5 O 12 :Ce; the red phosphor is CaAlSiN 3 :Eu, (Ca,Sr)AlSiN 3 :Eu, (Ba,Sr,Ca,Mg) 2 Si 5 N 8 :Eu, K 2 SiF 6 :Mn 4+ 、K 2 GeF 6 :Mn 4+ 、K 2 TiF 6 :Mn 4+ 。

[0016] Further, the second phosphor includes at least one yellow phosphor with a peak wavelength in the range of 550 - 580 nm and at least one red / orange phosphor with a peak wavelength in the range of 580 - 620 nm. The yellow phosphor is (Lu,Yb,Tb) 3 (Al, Ga) 5 O 12 :Ce, Ga-Y 3 Al 5 O 12: Ce, Y 3 (Al, Ga) 5 O 12 : Ce; The red / orange phosphor is CaAlSiN 3 : Eu, (Ca, Sr)AlSiN 3 : Eu, (Ba, Sr, Ca, Mg) 2 Si 5 N 8 : Eu, K 2 SiF 6 : Mn 4+ , K 2 GeF 6 : Mn 4+ , K 2 TiF 6 : Mn 4+ 。

[0017] Furthermore, the third phosphor includes at least one yellow-green phosphor with a peak wavelength in the range of 520 - 580 nm and at least one red phosphor with a peak wavelength in the range of 630 - 680 nm. The yellow-green phosphor is (Lu, Yb, Tb) 3 (Al, Ga) 5 O 12 : Ce, Ga - Y 3 Al 5 O 12 : Ce, Y 3 (Al, Ga) 5 O 12 : Ce; The red phosphor is CaAlSiN 3 : Eu, (Ca, Sr)AlSiN 3 : Eu, (Ba, Sr, Ca, Mg) 2 Si 5 N 8 : Eu, K 2 SiF 6 : Mn 4+ , K 2 GeF 6 : Mn 4+ , K 2 TiF 6 : Mn 4+ 。

[0018] Furthermore, the white light formed by the mixed light emission of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit has an adjustable color temperature in the range of 1800 - 20000 K, a color deviation Duv from the blackbody radiation line of less than 0.003, and a color rendering index CRI greater than 95 for all.

[0019] Further, the white light formed by the mixed light emission of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit has a color rendering index CRI greater than 97 within the color temperature range of 2300 - 10000K, where R1 to R15 are all greater than 90, the color fidelity Rf based on the TM-30 standard is greater than 95, and the color saturation Rg is between 100 ± 2.

[0020] Further, the white light formed by the mixed light emission of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit simulates a target spectrum, and the similarity to the target spectrum is greater than 85% within the color temperature range of 2300 - 20000K. When the relative color temperature is above 4000K, the target spectrum is a daylight spectrum; when the relative color temperature is below 4000K, the target spectrum is a blackbody radiation spectrum.

[0021] Further, the white light formed by the mixed light emission of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit simulates a target spectrum, and the similarity to the target spectrum is greater than 90% within the color temperature range of 3000 - 10000K.

[0022] Further, the light source module is a packaged chip, which includes a main body portion. A first accommodation groove, a second accommodation groove, a third accommodation groove, and a fourth accommodation groove are provided on the main body portion. The first LED chip and the first phosphor, the second LED chip and the second phosphor, the third LED chip and the third phosphor, and the fourth LED chip are respectively arranged in the first accommodation groove, the second accommodation groove, the third accommodation groove, and the fourth accommodation groove. The first encapsulation body, the second encapsulation body, the third encapsulation body, and the fourth encapsulation body respectively fill the first accommodation groove, the second accommodation groove, the third accommodation groove, and the fourth accommodation groove and cover the first LED chip, the second LED chip, the third LED chip, and the fourth LED chip.

[0023] Further, the light source module includes a light source board. The first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit are arranged on the light source board. A first lens, a second lens, a third lens, and a fourth lens respectively cover the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit. The first lens, the second lens, the third lens, and the fourth lens are convolute lenses. The first lens, the second lens, and the third lens are evenly distributed around the fourth lens in a circumferential manner.

[0024] The present application also provides an illumination system, which is characterized by including: a light source and a driving circuit.

[0025] The light source includes at least one of the above-mentioned light source modules;

[0026] The drive circuit is electrically connected to and supplies power to the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit respectively, and the drive circuit controls the current / voltage supplied to the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit respectively.

[0027] Further, the drive circuit includes:

[0028] A power conversion module that converts an external power supply into a DC power supply required by the light source module;

[0029] A control module that generates a control signal;

[0030] An LED drive module that receives the DC power supply output by the power conversion module and the control signal transmitted by the control module, adjusts the DC power supply according to the control signal, and the LED drive module is electrically connected to the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit respectively and outputs the drive current / voltage required by each light-emitting unit after adjustment to them.

[0031] Further, the control signal is a PWM signal.

[0032] Further, the control module includes a communication module that receives a dimming / color temperature adjustment command transmitted from the outside and generates the control signal based on this.

[0033] Further, the control module includes a storage module that stores preset control parameter values. The control parameter values are the control parameter values corresponding to the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit when the light source module generates different color temperatures. The light source module is controlled according to the control parameter values. The color temperature of the white light formed by the light emission of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit is adjustable within the range of 1800 - 20000K, and the color deviation Duv from the blackbody radiation line is less than 0.003, and the color rendering index CRI is greater than 95.

[0034] Further, when the light source module is controlled according to the control parameter values, the color rendering index CRI of the white light emitted by the light source module is greater than 97 within the range of 2300 - 10000K, where R1 to R15 are all greater than 90, and the color fidelity Rf based on the TM-30 standard is greater than 95, and the color saturation Rg is between 100 ± 2.

[0035] Further, the light source module is controlled according to the control parameter value to simulate a target spectrum, and the similarity with the target spectrum is greater than 85% within the color temperature range of 2300 - 20000K. When the relative color temperature is above 4000K, the target spectrum is a daylight spectrum; when the relative color temperature is below 4000K, the target spectrum is a blackbody radiation spectrum.

[0036] Further, the light source module is controlled according to the control parameter value to simulate a target spectrum, and the similarity with the target spectrum is greater than 90% within the color temperature range of 3000 - 10000K.

[0037] Further, the light source includes two or more of the above light source modules, and the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit in each light source module are respectively connected in series and then electrically connected to the LED driving module.

[0038] The present application also provides a lighting fixture, which is characterized by including the above light source module or the above lighting system.

[0039] The light source module, lighting system, and lighting fixture provided by the present application. The light source module includes a first light emitting unit, a second light emitting unit, a third light emitting unit, and a fourth light emitting unit that are electrically independent of each other. The light emitted by each light emitting unit is mixed to form white light. By selecting the light color and spectral characteristics of the light emitting units, the white light color temperature coverage range of this light source module obtained by mixing light is wide, covering the range from 1800K to 20000K, and the corresponding white light color point distribution trajectory can completely follow the blackbody radiation line, and the color deviation Duv value is less than 0.003, thereby improving the white light color deviation problem. At the same time, the white light spectrum of this light source module simulates the target spectrum. When the relative color temperature is above 4000K, the target spectrum is a daylight spectrum; when the relative color temperature is below 4000K, the target spectrum is a blackbody radiation spectrum. Since the spectrum simulates the daylight or blackbody radiation spectrum, the white light spectrum obtained thereby has good spectral similarity and color rendering property. The spectral similarity can reach more than 85% in the color temperature range of 2300 - 20000K, and can reach more than 90% in the color temperature range of 3000 - 10000K. The overall color temperature range from 1800 - 20000K can achieve a white light color rendering index greater than 95. Among them, the white light color rendering index can reach greater than 97 in the range of 2300 - 10000K, and R1 - R15 are all greater than 90. The color fidelity Rf based on the TM - 30 standard is greater than 95, and the color saturation Rg is between 100 ± 2. The white light color of this module is closer to daylight, significantly superior to the light quality performance of existing two - color temperature white light sources, and more suitable for the general lighting field. Description of the Drawings

[0040] Figure 1 is a schematic structural diagram of a light source module according to a preferred embodiment of the present invention;

[0041] Figure 2 It is the chromaticity point distribution diagram of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit in the light source module of the preferred embodiment of the present invention on the CIE 1931 chromaticity diagram;

[0042] Figure 3 It is the spectral energy distribution diagram of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit in the light source module of the preferred embodiment of the present invention;

[0043] Figure 4 It is the comparison diagram of the emission spectral curves between white light embodiment a emitted by the light source module of the preferred embodiment of the present invention and the standard blackbody radiation source (B27);

[0044] Figure 5 It is the comparison diagram of the emission spectral curves between white light embodiment b emitted by the light source module of the preferred embodiment of the present invention and the standard blackbody radiation source (B30);

[0045] Figure 6 It is the comparison diagram of the emission spectral curves between white light embodiment c emitted by the light source module of the preferred embodiment of the present invention and the standard D40 light source;

[0046] Figure 7 It is the comparison diagram of the emission spectral curves between white light embodiment d emitted by the light source module of the preferred embodiment of the present invention and the standard D50 light source;

[0047] Figure 8 It is the comparison diagram of the emission spectral curves between white light embodiment e emitted by the light source module of the preferred embodiment of the present invention and the standard D57 light source;

[0048] Figure 9 It is the comparison diagram of the emission spectral curves between white light embodiment f emitted by the light source module of the preferred embodiment of the present invention and the standard D64 light source;

[0049] Figure 10 It is the comparison diagram of the emission spectral curves between white light embodiment g emitted by the light source module of the preferred embodiment of the present invention and the standard blackbody radiation source;

[0050] Figure 11 It is the comparison diagram of the emission spectral curves between white light embodiment h emitted by the light source module of the preferred embodiment of the present invention and the standard blackbody radiation source;

[0051] Figure 12 It is the comparison diagram of the emission spectral curves between white light embodiment i emitted by the light source module of the preferred embodiment of the present invention and the standard D series light sources;

[0052] Figure 13 It is the comparison diagram of the emission spectral curves between white light embodiment j emitted by the light source module of the preferred embodiment of the present invention and the standard D series light sources;

[0053] Figure 14a and 14b Figures 14c, 14d, 14e, and 14f are schematic diagrams of the encapsulation structures of light source modules according to other preferred embodiments of the present invention;

[0054] Figure 15 is a schematic diagram of the structure of a lighting system according to a preferred embodiment of the present invention;

[0055] Figure 16 is a schematic diagram of the structure of a lamp according to a preferred embodiment of the present invention;

[0056] Figure 17 is a schematic diagram of the structure of a light source module according to another preferred embodiment that conforms to the present invention. Detailed Embodiments

[0057] The following further describes in detail a light source module, a lighting system, and a lamp proposed by the present invention in conjunction with the accompanying drawings and some preferred embodiments that conform to the present invention.

[0058] A specific embodiment of the light source module of the present invention is a mixed-light LED packaging chip, and the packaging form can be PLCC surface mount packaging, ceramic surface mount packaging, CSP packaging, multi-in-one single-chip surface mount packaging, or COB chip integrated packaging, which is not limited in this application.

[0059] The structure of a specific embodiment of the present invention is as shown in Figure 1As shown in the figure, the light source module 1 includes a main body portion 60 and a plurality of light-emitting units arranged in the main body portion 60 and spaced apart from each other - a first light-emitting unit 100, a second light-emitting unit 200, a third light-emitting unit 300, and a fourth light-emitting unit 400. Each light-emitting unit 100, 200, 300, 400 includes a light-emitting source 101, 201, 301, 401 and a package body 102, 202, 302, 402 covering it. The light-emitting sources 101, 201, 301, 401 are LED chips (LED Chip), including front-mounted or flip-chip, single LED Chip or multiple LED Chips connected in series, parallel, or series-parallel. In this embodiment, in order to accommodate the package bodies 102, 202, 302, 402, the main body portion 60 is a plastic bracket, and a plurality of accommodating grooves 61, 62, 63, 64 are provided therein. The material of the plastic bracket can be any one of PPA, PCT, and EMC. Each light-emitting source 101, 201, 301, 401 is respectively arranged in the accommodating grooves 61, 62, 63, 64, and each has a pair of pins 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b, and the pins 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b are electrically isolated from each other. The package bodies 102, 202, 302, 402 are made of silicone-based resin, epoxy resin, or a combination thereof, and are respectively filled into the accommodating grooves 61, 62, 63, 64 and cover each LED chip 101, 201, 301, 401 to ensure electrical isolation between the light-emitting units 100, 200, 300, 400.

[0060] In this embodiment, a light mixing scheme of multiple light sources is adopted. Among them, the first light-emitting unit 100, the second light-emitting unit 200, the third light-emitting unit 300, and the fourth light-emitting unit 400 emit blue-green light, yellow-orange light, orange-red light, and blue light respectively, and the light output combination of each light-emitting unit can form white light. Among them, the first light-emitting unit 100, the second light-emitting unit 200, and the third light-emitting unit 300 are phosphor excitation schemes, and the light output of the light-emitting unit is formed by the light-emitting source exciting the phosphor for light mixing. The fourth light-emitting unit 400 is a phosphor-free scheme, which is specifically as follows.

[0061] The fourth light-emitting unit 400 includes a fourth light-emitting source 401 and a fourth package body 402. The fourth light-emitting source 401 is placed at the bottom of the fourth accommodating groove 64 and is electrically connected to the outside through two pins 54a, 54b. The fourth package body 402 fills the fourth accommodating groove 64 and covers the fourth light-emitting source 401.

[0062] The fourth light source 401 is an LED chip combination, including two or more blue LED chips with different peak wavelengths. Each blue LED chip is connected in series or parallel. The blue LED chip refers to an LED chip that emits blue light with a peak wavelength in the range of 430 - 475 nm. The reason for choosing a combination of multiple different blue LED chips to form the fourth light source 401 is that the phosphor usually has a relatively wide distribution in terms of full-width half-maximum (FWHM), while the FWHM of a monochromatic LED chip is relatively narrow. In this embodiment, although no phosphor is added to the fourth light-emitting unit 400, in the case of a relatively narrow FWHM of the monochromatic LED chip, selecting chips with different peak wavelengths can form a superimposed form in the blue light band, so that the overall energy distribution in the blue light region is more uniform and the color rendering property is better. In this embodiment, the difference between the peak wavelengths of the two LED chips should be greater than or equal to 10 nm, which can ensure a relatively wide energy distribution in the blue light region. In a preferred solution, we divide the blue LED chips with peak wavelengths in the range of 430 - 475 into three types, namely the first blue LED chip with a peak wavelength of 430 - 445 nm; the second blue LED chip with a peak wavelength of 445 - 460 nm; the third blue LED chip with a peak wavelength of 460 - 475 nm, and ensure that the peak wavelength difference between any two of these three types is greater than or equal to 10 nm. The fourth light source 401 includes at least two types of chips, namely the first blue LED chip and the third blue LED chip, or a combination including the first blue LED chip, the second blue LED chip, and the third blue LED chip at the same time. At the same time, since the first light-emitting unit 100, the second light-emitting unit 200, and the third light-emitting unit 300 are in the form of blue LED chips exciting phosphors, the first light source 101, the second light source 201, and the third light source 301 are also selected from among the first blue LED chip, the second blue LED chip, and the third blue LED chip. When the fourth light source 401 selects two of the above three, the first light source 101, the second light source 201, and the third light source 301 can select the remaining one. When the first light source 101 selects a combination of three types, any one of the first light source 101, the second light source 201, and the third light source 301 can be selected. In this embodiment, the first light source 101 selects a combination of the first blue LED chip and the third blue LED chip, and the second light source 201 and the third light source 301 are selected as the second blue LED chip.

[0063] The spectral energy distribution of the light emitted by the fourth light-emitting unit 400 formed by the blue chip combination is shown as the 400 curve in Figure 3 the figure. Figure 3It is a relative spectral intensity diagram. All the curves in the diagram are normalized. Each point on the curve represents the energy magnitude at a certain wavelength on the horizontal axis. It can be seen from the diagram that the 400 curve includes at least 2 spectral emission peaks. The first peak wavelength P41 is located at 430 - 445 nm, and the second peak wavelength P42 is located at 460 - 480 nm. Moreover, the spectral intensity at the second peak wavelength P42 is 40 - 80% of the spectral intensity at the first peak wavelength P41.

[0064] The first light-emitting unit 100 includes a first light source 101 and a first encapsulation body 102. The first light source 101 is placed at the bottom of the first accommodation groove 61 and is electrically connected to the outside through two pins 51a and 51b. The first encapsulation body 102 fills the first accommodation groove 61 and covers the first light source 101. The first light source 101 is a blue LED that emits blue light with a peak wavelength in the range of 445 - 460 nm. The first encapsulation body 102 contains a first phosphor 103. The first phosphor 103 includes at least one blue-green phosphor with a peak wavelength located at 485 - 515 nm and at least one yellow-green phosphor with a peak wavelength located at 500 - 580 nm. In order to obtain a relatively wide FWHM, the first phosphor 103 simultaneously contains blue-green and yellow-green phosphors with different peak wavelengths. Of course, when we mention the blue-green phosphor and the yellow-green phosphor here, it does not mean that they only include one chemical composition. They can still be mixed phosphors respectively, that is, more than one phosphor can be mixed to finally form the blue-green phosphor and the yellow-green phosphor we need. The blue-green phosphor can be selected as (Ba,Sr)Si 2 N 2 O 2 :Eu. The yellow-green phosphor can be selected as (Lu,Yb,Tb) 3 (Al,Ga) 5 O 12 :Ce, Ga-Y 3 Al 5 O 12 :Ce, Y 3 (Al,Ga) 5 O 12 :Ce or any one of them or a combination of multiple of them.

[0065] The blue LED chip serving as the first light source 101 is arranged in the accommodation groove 61. After its light output excites the first phosphor 103, the spectral energy distribution of the light emitted by the first light-emitting unit 100 is Figure 3 shown as the 100 curve in Figure 3 It is a relative spectral intensity diagram. All the curves in the diagram are normalized. Each point on the curve represents the energy magnitude at a certain wavelength on the horizontal axis. As Figure 3The spectral curve of the light emitted by the first light-emitting unit 100 shown includes at least two spectral emission peaks. The first peak wavelength P11 is located at 445 - 460 nm, the second peak wavelength P12 is located at 480 - 520 nm, and the spectral intensity at the second peak wavelength P12 is 100 - 150% of the spectral intensity at the first peak wavelength P11. The light color of the light emitted by the first light-emitting unit 100 is blue-green and is located within the quadrilateral area enclosed by four points A1(0.18, 0.39), A2(0.22, 0.44), A3(0.25, 0.39), and A4(0.22, 0.35) on the 1931 CIE chromaticity diagram, that is Figure 2 the A area marked in the figure.

[0066] The second light-emitting unit 200 includes a second light source 201 and a second encapsulation body 202. The second light source 201 is placed at the bottom of the second accommodating groove 62 and is electrically connected to the outside through two pins 52a and 52b. The second encapsulation body 202 fills the second accommodating groove 62 and covers the second light source 201. The second light source 201 is a blue LED that emits blue light with a peak wavelength in the range of 445 - 460 nm. The second encapsulation body 202 contains a second phosphor 203. The second phosphor 203 includes at least one yellow phosphor with a peak wavelength located at 550 - 580 nm and at least one red / orange phosphor with a peak wavelength located at 580 - 620 nm. The yellow phosphor can be selected from any two or more combinations of (Lu, Yb, Tb) 3 (Al, Ga) 5 O 12 :Ce, Ga-Y 3 Al 5 O 12 :Ce, Y 3 (Al, Ga) 5 O 12 :Ce. The orange / red phosphor can be selected from any one or several combinations of CaAlSiN 3 :Eu, (Ca, Sr)AlSiN 3 (Ba, Sr, Ca, Mg) 2 Si 5 N 8 :Eu, K 2 SiF 6 :Mn 4+ , K 2 GeF 6 :Mn 4+ , K 2 TiF 6 :Mn 4+ After the second light source 201 excites the second phosphor 203, the light emitted by the second light-emitting unit 200 includes at least two spectral emission peaks, such asFigure 3 The first peak wavelength P21 shown is located at 585 - 620 nm, the second peak wavelength P22 is located at 550 - 580 nm, and the spectral intensity at the second peak wavelength P22 is 40 - 70% of the spectral intensity at the first peak wavelength P21, with a spectral half-width of 80 - 120 nm. Its spectral energy distribution is shown as curve 200 in Figure 3 The light color of the light emitted by the second light-emitting unit 200 is yellowish-orange and is located within the quadrilateral region enclosed by four points B1(0.46, 0.47), B2(0.48, 0.51), B3(0.53, 0.46), and B4(0.49, 0.44) on the 1931 CIE chromaticity diagram, that is, Figure 2 the B region marked in

[0067] The third light-emitting unit 300 includes a third light source 301 and a third encapsulation body 302. The third light source 301 is placed at the bottom of the third accommodating groove 63 and is electrically connected to the outside through two pins 53a and 53b. The third encapsulation body 302 fills the third accommodating groove 63 and covers the third light source 301. The third light source 301 is a blue LED that emits blue light with a peak wavelength in the range of 445 - 460 nm. The third encapsulation body 302 contains a third phosphor 303, and the third phosphor 303 includes at least one yellow-green phosphor with a peak wavelength located at 520 - 580 nm and at least one red phosphor with a peak wavelength located at 630 - 680 nm. The third phosphor 303 needs to include both yellow-green and red phosphors at the same time. Of course, each of these two phosphors can also be a mixed phosphor. The yellow-green phosphor can be selected from (Lu, Yb, Tb) 3 (Al, Ga) 5 O 12 :Ce, Ga - Y 3 Al 5 O 12 :Ce, Y 3 (Al, Ga) 5 O 12 :Ce or any one of them or a combination of multiple of them. The red phosphor can be selected from CaAlSiN 3 :Eu, (Ca, Sr)AlSiN 3 :Eu, (Ba, Sr, Ca, Mg) 2 Si 5 N 8 :Eu, K 2SiF 6 :Mn 4+ 、K 2 GeF 6 :Mn 4+ 、K 2 TiF 6 :Mn 4+ Any one or several combinations thereof. After the third phosphor 303 is excited by the third light source 301, the light emitted by the third light emitting unit 300 includes at least two spectral emission peaks. The first peak wavelength P31 is located at 630 - 680 nm, the second peak wavelength P32 is located at 550 - 580 nm, and the spectral intensity at the second peak wavelength P32 is 0 - 40% of the spectral intensity at the first peak wavelength P31, and the spectral half-width is 70 - 100 nm. Its spectral energy distribution is shown as curve 300 in Figure 3 The light color of the light emitted by the third light emitting unit 300 is orange-red, and it is located within the quadrilateral region enclosed by four points C1(0.60, 0.36), C2(0.63, 0.37), C3(0.71, 0.29), and C4(0.67, 0.29) on the 1931 CIE chromaticity diagram, that is, Figure 2 the C region marked in

[0068] As we all know, the three primary colors can be mixed to form white light. In previous solutions, white light was formed by mixing RGB three-color lights. In this embodiment, the existing RGB scheme is optimized, and different light colors are selected. The first light emitting unit 100 emits blue-green light, the second light emitting unit 200 emits orange-yellow light, the third light emitting unit 300 emits orange-red light, and the fourth light emitting unit 400 emits blue light. When the lights emitted by these four are combined to form white light, full-spectrum white light can be obtained. The full-spectrum white light proposed in this application is achieved by simulating the target spectrum. When the target color temperature is lower than 4000K, the spectrum of the light emitted by the light source module 1 targets the blackbody radiation spectrum. When the target color temperature is above 4000K, the spectrum of the light emitted by the light source module 1 targets the simulated sunlight spectrum. The sunlight spectrum described in this application is the relative spectral power distribution of the D series standard illuminants specified by the International Commission on Illumination (CIE), such as D50, D57, D65 standard light sources... etc. In addition, the blackbody radiation spectrum at different color temperatures (T) and the blackbody radiation spectrum (B) conform to the following relationship:

[0069]

[0070] Among them, T represents the color temperature, h is Planck's constant, c is the speed of light (3x10 8 m / s), K is Boltzmann's constant, T B is the absolute temperature of the black body, and λ is the radiation wavelength.

[0071] In order to evaluate the simulated matching degree between the white light spectrum obtained in the embodiment and the target spectrum, and in view of the fact that there is currently no relevant evaluation standard promulgated by an authoritative institution, the evaluation method of the spectral matching degree adopted in this application, that is, the spectral similarity (SS, Spectral Similarity), is to refer to the average spectral deviation value (ASD, Average Spectral Difference) published by Bridgelux Inc. USA. The spectra of the reference light sources with different color temperatures adopted by it are similar to the TM-30 standard published by the Illuminating Engineering Society of North America (IES). That is, when its color temperature is above 5000K, the reference spectrum is based on the D-series standard illuminant. When the color temperature is below 4000K, the spectrum emitted by the black body radiation light source is used as the reference. When the color temperature is between 4000K and 5000K, the spectrum emitted by the mixed light source of the 4000K black body radiation light source and the D50 standard illuminant is used as the reference. In addition, considering the band distribution of the human eye's visual sensitivity response, the spectral deviation evaluation range is limited between 425nm and 690nm. The specific calculation method is as follows:

[0072]

[0073] SS = 1 - ASD

[0074] Among them, φref is the relative intensity of the reference light source, φ is the relative intensity of the light source to be evaluated, and λ is the wavelength.

[0075] By performing dimming control on four light-emitting units respectively, white light of various different color temperatures can be mixed. In this embodiment, we use a PWM signal as the control signal and independently control the light-emitting units of four colors through the PWM dimming method, and apply different duty cycles to modulate the light-emitting power of each light-emitting unit to achieve the effect of mixed light. Table 1 lists several specific embodiments in the range of the general white light color temperature from 2700K to 6500K by modulating the duty cycles of the PWM signals of three light-emitting units under different conditions. Table 1 shows the PWM duty cycles of each light-emitting unit, as well as the actual color temperature of the full-spectrum white light achieved by modulating the PWM signals of the four light-emitting units of the light source module 1, the color deviation (Duv) from the blackbody radiation line, the spectral similarity, the color rendering index (CRI), the color fidelity (Rf), the color saturation (Rg), and the special color rendering indices R1 to R15.

[0076] Table 1

[0077]

[0078] Examples a, b, c, d, e, f in the table correspond to the target color temperatures of 2700K, 3000K, 4000K, 5000K, 5700K, and 6500K respectively. The target color temperature is the color temperature that is desired to be obtained. Due to the differences of individual products, there will be a slight deviation in the actual values under the determined target color temperature. The color temperatures listed in the table are the measured color temperatures of each example. The spectral energy distribution of the full-spectrum white light obtained in each example and the comparison with the target spectrum are as Figures 4 to 9 shown. Among them Figure 4 is the comparison diagram of the emission spectral curves of Example a and the standard blackbody radiation light source (B27); Figure 5 is the comparison diagram of the emission spectral curves of Example b and the standard blackbody radiation light source (B30); Figure 6 is the comparison diagram of the emission spectral curves of Example c and the standard D40 light source; Figure 7 is the comparison diagram of the emission spectral curves of Example d and the standard D50 light source; Figure 8 is the comparison diagram of the emission spectral curves of Example e and the standard D57 light source; Figure 9 is the comparison diagram of the emission spectral curves of Example f and the standard D65 light source.

[0079] In addition to the data of the examples listed in Table 1, the white light color temperature that can be obtained by the light source module 1 proposed in this application is wider than the general white light color temperature range. Table 2 lists the example data of the light source module 1 in the two ranges of the white light color temperature from 1800K to 2700K and from 6500K to 20000K, including the control duty cycles of each path and the relevant light quality data.

[0080] Table 2

[0081] g h i j PWM Duty Cycle of the First Light Emitting Unit 200 3％ 10％ 23％ 20％ PWM Duty Cycle of the Second Light Emitting Unit 300 30％ 35％ 13％ 10％ PWM Duty Cycle of the Third Light Emitting Unit 400 67％ 55％ 10％ 6％ PWM Duty Cycle of the Fourth Light Emitting Unit 100 0％ 0％ 54％ 63％ Relative Color Temperature CCT (K) 1795 2313 10098 19878 Color Deviation Duv -0.0002 -0.0001 0.0003 0.0003 Spectral Similarity SS 78％ 85％ 90％ 88％ Color Fidelity Rf 91 97 96 94 Color Saturation Rg 104 101 100 99 CRI (Ra) 96.7 97.4 98.0 97.1 R1 99 97 97 97 R2 100 99 98 98 R3 94 97 98 97 R4 96 95 98 96 R5 98 97 98 96 R6 96 96 97 95 R7 96 99 100 98 R8 94 99 99 98 R9 87 96 94 94 R10 97 99 98 96 R11 90 91 98 97 R12 96 95 94 91 R13 99 97 98 99 R14 94 97 98 98 R15 97 100 97 98

[0082] The spectral energy distribution of the full-spectrum white light obtained in each of the embodiments listed in the table and the comparison with the target spectrum are as Figures 10 to 13 shown. Among them Figure 10 is the comparison chart of the emission spectral curves of Example g and the standard blackbody radiation light source, Figure 11 is the comparison chart of the emission spectral curves of Example h and the standard blackbody radiation light source; Figure 12 is the comparison chart of the emission spectral curves of Example i and the standard D-series light source; Figure 13 is the comparison chart of the emission spectral curves of Example j and the standard D-series light source.

[0083] As can be seen from Table 1 and Table 2, the full-spectrum white light emitted after mixing the first light-emitting unit 100, the second light-emitting unit 200, the third light-emitting unit 300, and the fourth light-emitting unit 400 in this embodiment has a wide color temperature coverage range, which can be achieved from 1800 - 20000K, and the color deviation Duv from the blackbody radiation line is less than 0.003, ensuring that the light color is more pure in any color temperature state of the entire light source module. At the same time, the spectral similarity between the obtained white light spectrum and the target spectrum is high. When the color temperature of the white light emitted by the light source module is between 2300 - 20000K, the spectral similarity is greater than 85%. Among them, when the color temperature of the white light is between 3000 - 10000K, the spectral similarity is greater than 90%. Basically, within the adjustable color temperature range of the light source module, its white light spectrum reaches the level of full spectrum. Here, we list several existing LED light sources with a relative color temperature of 4000K and calculate their SS values according to the above evaluation method, which are used as the control reference values for the embodiments of this application. Among them, the spectral similarity of the existing conventional Ra80 white LED is 68%, the spectral similarity of the conventional Ra90 white LED is 78%, and the spectral similarity of the conventional Ra95 white LED is 81%. The spectral similarity of these existing products is significantly lower than that of the light source module 1 proposed in this application. In terms of color rendering, also due to its high spectral similarity, when the color temperature of the white light emitted by the light source module is between 1800 - 20000K, the color rendering index CRI is greater than 95, and when the color temperature of the white light is between 2300 - 10000K, the color rendering index CRI is greater than 97, where R1 to R15 are all greater than 90, and the color fidelity Rf based on the TM-30 standard is greater than 95, and the color saturation Rg is between 100 ± 2. All in all, the light source module 1 has the advantages of a wide color temperature range, high spectral similarity, and good color rendering.

[0084] In Figure 1In the embodiment, a packaging structure of the light source module 1 is shown, in which four light-emitting units are packaged as a whole. In other preferred embodiments, each light-emitting unit can also be independently packaged and finally arranged on the same substrate to form the light source module 1. Additionally, the first light-emitting unit 100 and the second light-emitting unit 200 can be packaged independently, while the third light-emitting unit 300 and the fourth light-emitting unit are independently packaged. The present application does not limit this. There are many packaging structures for independent packaging. Since the structures of the first light-emitting unit 100, the second light-emitting unit 200, and the third light-emitting unit 300 are the same, taking a light-emitting unit with a structure similar to theirs, the first light-emitting unit 100 as an example, some other preferred independent packaging forms will be described. The first light-emitting unit 100 also includes a first light source 101, a first encapsulant 102 covering it, and a first phosphor 103. In Figure 14a , 14b The packaging structure of the embodiment also adopts a bracket structure as in Figure 1 the embodiment, and a first accommodating groove 61 is formed on the bracket. Figure 14a In the embodiment, a single light-emitting unit in the light source module 1 is shown. After the first light source 101 is placed, it is electrically connected to the outside through pins 51a and 51b. The first phosphor 103 is first laid flat on the surface of the first light source 101 by spraying or coating, and then the first encapsulant 102 is used to fill the first accommodating groove 61. And in Figure 14b , the first accommodating groove 61 already containing the first light source 101 is first filled with the first encapsulant 102, and then the first phosphor 103 is laid flat on the upper surface of the first encapsulant 102 by spraying or coating. As previously mentioned, we already know that the first phosphor 103 of the first light-emitting unit 100 includes various different phosphors. Figure 14c The packaging structure of Figure 14b is different from that of Figure 14e in that different types of phosphors are coated in layers, thus forming the double-layer structure shown in the figure. Figure 14 shows a ceramic high-power packaging method. Using a ceramic or metal material as the substrate 94, the first light source 101 is arranged on the substrate 94, and the first phosphor 103 is used to form a light conversion layer on the surface of the first light source 101 by spraying, fluorescent film laminating, or fluorescent ceramic sheet mounting, and then the first encapsulant 102 is filled by mold injection to cover the first phosphor 103 and the first light source 101. Figure 14e is a CSP packaging, suitable for high-power chips. Using a ceramic or metal material as the substrate 94, after the first phosphor 103 and the first encapsulant 102 are mixed, a light conversion layer on the surface of the first light source 101 is formed by fluorescent film laminating to complete the packaging. Figure 14f The structure of Figure 14eSimilarly, using a ceramic or metal substrate 94 as well, the first phosphor 103 is formed into a light conversion layer on the surface of the first light source 101 by spraying or fluorescent film laminating, and the first encapsulation body 102 is arranged on the outside to complete the encapsulation. The above methods can all achieve the invention purpose of the present invention, and the present invention does not limit this.

[0085] Another preferred embodiment of the light source module of the present invention is as Figure 17 shown, which includes a light source board 6 and four light emitting units arranged on the light source board, the first light emitting unit 100, the second light emitting unit 200, the third light emitting unit 300, the fourth light emitting unit 400, and four lenses corresponding to these light emitting units one by one, the first lens 501, the second lens 502, the third lens 503, the fourth lens 504. The first lens 501, the second lens 502, the third lens 503, and the fourth lens 504 respectively cover the first light emitting unit 100, the second light emitting unit 200, the third light emitting unit 300, and the fourth light emitting unit 400. The spectra and light colors of the four light emitting units are the same as those of the foregoing embodiments, and will not be elaborated here.

[0086] In this embodiment, the first lens 501, the second lens 502, the third lens 503, and the fourth lens 504 are integrated into a light distribution module 5. The fourth lens 504 is arranged in the middle, and the other three lenses are arranged around the fourth lens 504. The centers of the first lens 501, the second lens 502, and the third lens 503 are evenly distributed, that is, equally angularly distributed on the circumferential surface coaxial with the fourth lens.

[0087] Another preferred embodiment of the present invention is as Figure 15 shown in the lighting system, which includes the light source module 1 and the driving circuit 2 in the above embodiment.

[0088] The driving circuit 2 includes a power conversion module 21, a control module 22, and an LED driving module 23. The power conversion module 21 is connected to an external power source and converts the external power source into a DC power source required by the light source module 1. The control module 22 includes a communication module, which receives the dimming / color temperature adjustment commands transmitted from the outside and generates a control signal accordingly. The communication module can be a wired or wireless communication module, and the present invention does not limit this. The input of the LED driving module 23 is the DC power source output by the power conversion module 21 and the control signal transmitted from the control module 22. According to the control signal, the DC power source is adjusted, and the adjusted driving current / voltage required by each of the first light emitting unit 100, the second light emitting unit 200, the third light emitting unit 300, and the fourth light emitting unit 400 in the light source module 1 is output respectively. Therefore, the LED driving module 23 needs to be electrically connected to the first light emitting unit 100, the second light emitting unit 200, the third light emitting unit 300, and the fourth light emitting unit 400 respectively. When there are multiple light source modules 1 in the lighting system, such as Figure 15As shown, the first light-emitting unit 100, the second light-emitting unit 200, the third light-emitting unit 300, and the fourth light-emitting unit 400 in each light source module 1 are respectively connected in series and then electrically connected to the LED driving module 23.

[0089] As described above, the color temperature adjustable range of the light source module 1 in the embodiment is from 1800 - 14000K, and it is necessary to simulate the target spectrum. Therefore, the control module 22 includes a storage module that stores preset control parameter values. The control parameter values are the control parameter values corresponding to the first light-emitting unit 100, the second light-emitting unit 200, and the third light-emitting unit 300 when the light source module 1 generates different color temperatures. The control parameter values can be voltage values, current values, or PWM signals. When a light-emitting unit does not participate in the mixed light, the control parameter value of this light-emitting unit is zero. When a color temperature change requirement is sent from the outside, the control module 22 receives the command, reads the relevant values in the storage module, forms a control signal and sends it to the LED driving module 23 to adjust the current / voltage output to the first light-emitting unit 100, the second light-emitting unit 200, and the third light-emitting unit 300, so that the light source module 1 emits light of the target color or white light of the corresponding color temperature. In this embodiment, the preset control parameters are the duty ratios of the PWM signals of each light-emitting unit in Table 1 and Table 2. Since the light source module 1 selects light-emitting units of specific colors and is controlled according to the preset parameters, the full-spectrum white light obtained has a wider color temperature coverage range compared with the white light obtained by mixing light in the prior art. It can be achieved from 1800 - 20000K, and the color deviation Duv from the blackbody radiation line is less than 0.003, ensuring that the entire light source module has a more pure light color in any color temperature state. At the same time, the spectral similarity between the obtained white light spectrum and the target spectrum is high. When the color temperature of the white light emitted by the light source module is between 2300 - 20000K, the spectral similarity is greater than 85%. Among them, when the color temperature of the white light is between 3000 - 10000K, the spectral similarity is greater than 90%. Basically, within the adjustable color temperature range of the light source module, its white light spectrum reaches the level of full spectrum. In terms of color rendering, also due to its high spectral similarity, when the color temperature of the white light emitted by the light source module is between 1800 - 20000K, the color rendering index CRI is greater than 95, and when the color temperature of the white light is between 2300 - 10000K, the color rendering index CRI is greater than 97, where R1 - R15 are all greater than 90, and the color fidelity Rf based on the TM-30 standard is greater than 95, and the color saturation Rg is between 100 ± 2. All in all, the light source module 1 has the advantages of a wide color temperature range, high spectral similarity, and good color rendering.

[0090] The above-mentioned light source module and lighting system can be applied to various types of lamps. Figure 16The figure shows a lighting fixture D1 according to a preferred embodiment of the present application. The lighting fixture D1 is a lamp panel and includes the lighting system as described above. In other preferred embodiments, it may also be a pendant lamp, a ceiling lamp, etc. Alternatively, the light source module 1 can also be applied as a common white light chip to various lighting fixtures such as table lamps, downlights, and spotlights. The lighting fixture D1 includes a chassis 86, a face frame 88 provided with a diffusion plate 89, a plurality of light source modules 1 disposed on a light source board 85, and a power supply box 87. The aforementioned driving circuit 2 is disposed in the power supply box 87. In the lighting fixture, wiring is respectively performed for the first light emitting unit 100, the second light emitting unit 200, the third light emitting unit 300, and the fourth light emitting unit 400 in the light source module 1. The same type of light emitting units in each light source module 1 are connected in series with each other and then connected to the driving circuit 2 in the power supply box 87 to form the aforementioned lighting system. The lighting fixture D1 may also include a controller, a heat dissipation device, a light distribution component, etc. according to the functions and requirements of the specific lighting fixture. The controller can be used to adjust the light color, light intensity, etc. of the illumination light emitted by the light source module L1. In addition to the diffusion plate in the embodiment, the light distribution component may also be a lamp shade, a lens, a diffusion element, an optical waveguide, etc. The present invention does not limit this.

[0091] The foregoing description of the preferred embodiments of the present invention is for purposes of illustration and description and is not intended to exhaust or limit the invention to the specific forms disclosed. Obviously, many modifications and variations are possible, and these may be apparent to those skilled in the art and should be included within the scope of the invention as defined by the appended claims.

Claims

1. A light source module, characterized in that, it includes a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and a fourth light-emitting unit that are electrically independent of each other; the first light-emitting unit includes a first light source, a first encapsulation body covering the first light source, and a first phosphor. The light emitted by the first light-emitting unit includes at least two spectral emission peaks. The first peak wavelength is located at 445 - 460 nm, the second peak wavelength is located at 480 - 520 nm, and the spectral intensity at the second peak wavelength is 100 - 150% of the spectral intensity at the first peak wavelength. Its light color is blue-green light located within the quadrilateral region enclosed by four points A1(0.18, 0.39), A2(0.22, 0.44), A3(0.25, 0.39), and A4(0.22, 0.35) on the 1931 CIE chromaticity diagram; the second light-emitting unit includes a second light source, a second encapsulation body covering the second light source, and a second phosphor. The light emitted by the second light-emitting unit includes at least two spectral emission peaks. The first peak wavelength is located at 585 - 620 nm, the second peak wavelength is located at 550 - 580 nm, and the spectral intensity at the second peak wavelength is 40 - 70% of the spectral intensity at the first peak wavelength. The spectral half-width is 80 - 120 nm. Its light color is yellow-orange light located within the quadrilateral region enclosed by four points B1(0.46, 0.47), B2(0.48, 0.51), B3(0.53, 0.46), and B4(0.49, 0.44) on the 1931 CIE chromaticity diagram; the third light-emitting unit includes a third light source, a third encapsulation body covering the third light source, and a third phosphor. The light emitted by the third light-emitting unit includes at least two spectral emission peaks. The first peak wavelength is located at 630 - 680 nm, the second peak wavelength is located at 550 - 580 nm, and the spectral intensity at the second peak wavelength is 0 - 40% of the spectral intensity at the first peak wavelength. The spectral half-width is 70 - 100 nm. Its light color is orange-red light located within the quadrilateral region enclosed by four points C1(0.60, 0.36), C2(0.63, 0.37), C3(0.71, 0.29), and C4(0.67, 0.29) on the 1931 CIE chromaticity diagram; the fourth light-emitting unit includes a fourth light source and a fourth encapsulation body covering the fourth light source. The light emitted by the fourth light-emitting unit includes at least two spectral emission peaks. The first peak wavelength is located at 430 - 445 nm, the second peak wavelength is located at 460 - 480 nm, and the spectral intensity at the second peak wavelength is 40 - 80% of the spectral intensity at the first peak wavelength.

2. The light source module according to claim 1, characterized in that, the blue light content of the second light-emitting unit is less than 10%, and the blue light content of the third light-emitting unit is less than 5%.

3. The light source module according to claim 1, characterized in that, The fourth light source is an LED chip combination, including two or more blue LED chips with different peak wavelengths. The peak wavelength of the blue LED chips is 430 - 475 nm, and the peak wavelength difference between the two or more blue LED chips with different peak wavelengths is greater than or equal to 10 nm.

4. The light source module according to claim 3, characterized in that the peak wavelength of the first blue LED chip is 430 - 445 nm; the peak wavelength of the second blue LED chip is 445 - 460 nm; the peak wavelength of the third blue LED chip is 460 - 475 nm. The peak wavelength difference between any two of the first blue LED chip, the second blue LED chip, and the third blue LED chip is greater than or equal to 10 nm. The fourth light source includes the first blue LED chip and the third blue LED chip, and the first light source, the second light source, and the third light source are the second blue LED chip.

5. The light source module according to claim 1, characterized in that The first phosphor includes at least one blue-green phosphor with a peak wavelength in the range of 485 - 515 nm and at least one yellow-green phosphor with a peak wavelength in the range of 500 - 580 nm. The blue-green phosphor is (Ba,Sr)Si 2 N 2 O 2 :Eu; The yellow-green phosphor is (Lu,Yb,Tb) 3 (Al,Ga) 5 O 12 :Ce, Ga-Y 3 Al 5 O 12 :Ce, Y 3 (Al,Ga) 5 O 12 :Ce; The red phosphor is CaAlSiN 3 :Eu, (Ca,Sr)AlSiN 3 :Eu, (Ba,Sr,Ca,Mg) 2 Si 5 N 8 :Eu, K 2 SiF 6 :Mn 4+ 、K 2 GeF 6 :Mn 4+ 、K 2 TiF 6 :Mn 4+ 。 6. The light source module according to claim 1, characterized in that The second phosphor includes at least one yellow phosphor with a peak wavelength in the range of 550 - 580 nm and at least one red / orange phosphor with a peak wavelength in the range of 580 - 620 nm. The yellow phosphor is (Lu, Yb, Tb) 3 (Al, Ga) 5 O 12 :Ce, Ga - Y 3 Al 5 O 12 :Ce, Y 3 (Al, Ga) 5 O 12 :Ce; The red / orange phosphor is CaAlSiN 3 :Eu, (Ca, Sr)AlSiN 3 :Eu, (Ba, Sr, Ca, Mg) 2 Si 5 N 8 :Eu, K 2 SiF 6 :Mn 4+ 、K 2 GeF 6 :Mn 4+ 、K 2 TiF 6 :Mn 4+ 。 7. The light source module according to claim 1, characterized in that The third phosphor includes at least one yellow-green phosphor with a peak wavelength in the range of 520 - 580 nm and at least one red phosphor with a peak wavelength in the range of 630 - 680 nm. The yellow-green phosphor is (Lu,Yb,Tb) 3 (Al, Ga) 5 O 12 :Ce, Ga-Y 3 Al 5 O 12 :Ce, Y 3 (Al,Ga) 5 O 12 :Ce; The red phosphor is CaAlSiN 3 :Eu, (Ca,Sr)AlSiN 3 :Eu, (Ba,Sr,Ca,Mg) 2 Si 5 N 8 :Eu, K 2 SiF 6 :Mn 4+ 、K 2 GeF 6 :Mn 4+ 、K 2 TiF 6 :Mn 4+ 。 8. The light source module according to claim 1, characterized in that the white light formed by the combined light emission of the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit has an adjustable color temperature in the range of 1800 - 20000K, and the color deviation Duv from the blackbody radiation line is less than 0.003, and the color rendering index CRI is greater than 95.

9. The light source module according to claim 8, characterized in that the white light formed by the combined light emission of the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit has a color rendering index CRI greater than 97 in the color temperature range of 2300 - 10000K, where R1 to R15 are all greater than 90, and the color fidelity Rf based on the TM - 30 standard is greater than 95, and the color saturation Rg is between 100 ± 2.

10. The light source module according to claim 8, characterized in that the white light formed by the combined light emission of the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit simulates the target spectrum, and the similarity with the target spectrum is greater than 85% in the color temperature range of 2300 - 20000K. When the relative color temperature is above 4000K, the target spectrum is the sunlight spectrum; when the relative color temperature is below 4000K, the target spectrum is the blackbody radiation spectrum.

11. The light source module according to claim 10, characterized in that the white light formed by the combined light emission of the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit simulates the target spectrum, and the similarity with the target spectrum is greater than 90% in the color temperature range of 3000 - 10000K.

12. The light source module according to claim 1, characterized in that The light source module is a packaged chip, which includes a main body portion. A first accommodation groove, a second accommodation groove, a third accommodation groove, and a fourth accommodation groove are provided on the main body portion. The first LED chip and the first phosphor, the second LED chip and the second phosphor, the third LED chip and the third phosphor, and the fourth LED chip are respectively arranged in the first accommodation groove, the second accommodation groove, the third accommodation groove, and the fourth accommodation groove. The first encapsulation body, the second encapsulation body, the third encapsulation body, and the fourth encapsulation body respectively fill the first accommodation groove, the second accommodation groove, the third accommodation groove, and the fourth accommodation groove and cover the first LED chip, the second LED chip, the third LED chip, and the fourth LED chip.

13. The light source module according to claim 1, characterized in that the light source module includes a light source board. The first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit are arranged on the light source board. The first lens, the second lens, the third lens, and the fourth lens respectively cover the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit. The first lens, the second lens, the third lens, and the fourth lens are convolute lenses. The first lens, the second lens, and the third lens are evenly distributed around the fourth lens in a circumferential manner.

14. An illumination system, characterized in that it includes: a light source and a driving circuit, the light source includes at least one light source module according to any one of claims 1 to 13; the driving circuit is respectively electrically connected to the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit and supplies power to them. The driving circuit controls the current / voltage provided to the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit respectively.

15. The illumination system according to claim 14, characterized in that the driving circuit includes: a power conversion module, which converts an external power supply into a DC power supply required by the light source module; a control module, which generates a control signal; an LED driving module, which receives the DC power supply output by the power conversion module and the control signal transmitted from the control module, adjusts the DC power supply according to the control signal, and the LED driving module is respectively electrically connected to the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit and outputs the adjusted driving current / voltage required by each light emitting unit to them.

16. The illumination system according to claim 15, characterized in that the control signal is a PWM signal.

17. The illumination system according to claim 15, characterized in that the control module includes a communication module, which receives a dimming / color adjustment command transmitted from the outside and generates the control signal based on this.

18. The illumination system according to claim 15, characterized in that The control module includes a storage module that stores preset control parameter values. The control parameter values are the control parameter values corresponding to the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit when the light source module generates different color temperatures. The light source module is controlled according to the control parameter values. The white light color temperature formed by the light emission of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit is adjustable within the range of 1800 - 20000K, and the color deviation Duv from the blackbody radiation line is less than 0.003, and the color rendering index CRI is greater than 95.

19. The lighting system according to claim 18, wherein, the light source module is controlled according to the control parameter values. The color rendering index CRI of the white light color temperature emitted by the light source module is greater than 97 within the range of 2300 - 10000K, where R1 to R15 are all greater than 90, and the color fidelity Rf based on the TM-30 standard is greater than 95, and the color saturation Rg is between 100 ± 2.

20. The lighting system according to claim 18, wherein, the light source module is controlled according to the control parameter values to simulate the target spectrum. The similarity to the target spectrum is greater than 85% within the color temperature range of 2300 - 20000K. When the relative color temperature is above 4000K, the target spectrum is the daylight spectrum; when the relative color temperature is below 4000K, the target spectrum is the blackbody radiation spectrum.

21. The lighting system according to claim 20, wherein, the light source module is controlled according to the control parameter values to simulate the target spectrum. The similarity to the target spectrum is greater than 90% within the color temperature range of 3000 - 10000K.

22. The lighting system according to claim 14, wherein, the light source includes two or more of the light source modules. The first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit in each light source module are respectively connected in series and then electrically connected to the LED driving module.

23. A lamp, wherein, it includes the light source module according to any one of claims 1 to 13, or includes the lighting system according to any one of claims 14 to 22.

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