CN217235328U

CN217235328U - Light source module, lighting system and lamp

Info

Publication number: CN217235328U
Application number: CN202123404814.6U
Authority: CN
Inventors: 朱昌荣; 马海云; 刘超博
Original assignee: Opple Lighting Co Ltd; Suzhou Op Lighting Co Ltd
Current assignee: Opple Lighting Co Ltd; Suzhou Op Lighting Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-08-19
Anticipated expiration: 2031-12-31

Abstract

A light source module, a lighting system and a lamp are provided, wherein the light source module comprises a first light-emitting unit, a second light-emitting unit and a third light-emitting unit which are electrically independent from each other, and monochromatic light with different light colors emitted by the light-emitting units is mixed to form white light. The lighting system comprises the light source module and a driving circuit. The driving circuit can control the three light-emitting units in the light source module in a distributed manner, so that the color temperature coverage range of the white light obtained by light mixing is wide, the coverage range is from 1600K to 16000K, the distribution locus of the corresponding white light color point can completely follow the black body radiation line, and the problem of white light color deviation is solved. Meanwhile, the light source module has good color rendering, the white light color rendering index is larger than 90 in the range of 2700K-6500K color temperature, the light quality of the existing RGB three-in-one and RGBW four-in-one light source is superior, and the light source module is more suitable for the field of general indoor lighting.

Description

Light source module, lighting system and lamp

Technical Field

The utility model relates to a light source module, lighting system and lamps and lanterns.

Background

Among various light sources, Light Emitting Diodes (LEDs) are widely used in various light emitting devices such as indoor and outdoor lighting, smart lighting, plant lighting, vehicle lighting, indoor and outdoor display lighting, etc. because of their low power consumption and high luminous efficiency.

In general, if the requirement of dimming and color mixing is required, one solution is to use three primary colors of red, green and blue for color mixing, and the LED used in this three-primary color mixing mode mainly has a single-wavelength LED chip, in this case, since the full-width-half-maximum (FWHM) of each monochromatic spectrum is narrow, sufficient color rendering index cannot be ensured, so there is a limit in realizing desired white light.

Thus, in application scenarios where requirements for color rendering are high, white light emitting LED devices are fabricated by applying one or more types of phosphors (e.g., green, yellow, or red phosphors) to a blue or ultraviolet LED chip. Since the fluorescent powder generally has a wide distribution in the FWHM characteristics, the white LED manufactured therefrom can ensure desired color rendering and have high color reproducibility. However, the color of the chip is fixed, and only white light with one color temperature can be generated. The current dimming and color-mixing mode of the white light illuminating device is to mix light by two white light LEDs with different color temperatures. Although the color rendering is guaranteed, the method has the disadvantages that the color point distribution of mixed light in the CIE1931 chromaticity diagram is far from the existing color point standard (ANSI or ERP), so that the color deviation level of the lighting device is poor, and the white light color is obviously different from the standard. If the color tolerance level of the lighting device needs to be improved, a technical scheme of reducing the relative color temperature difference between two white light LEDs with different color temperatures can be adopted, but the problem of narrow adjustable light and color range can be derived. Another way is to redefine the color point distribution center or range of two different white LEDs, which also leads to large color deviation of the highest and lowest white color temperatures.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem, provide a colour temperature is adjustable and can guarantee that white light colour point distribution track all can follow the black body radiation line under different colour temperatures, and light source module, lighting system and lamps and lanterns of colour rendering nature preferred.

In order to achieve the above-mentioned functions, the present invention provides a light source module, which comprises a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit electrically independent from each other;

the first light-emitting unit comprises a first LED chip and a first packaging body covering the first LED chip, and the first LED chip is configured to emit blue light with the peak wavelength of 455-462.5 nm;

the second light-emitting unit comprises a second LED chip, a second packaging body covering the second LED chip and a first phosphor, wherein the first phosphor is configured to be excited by the second LED chip to emit light with a peak wavelength of 535-550nm, a half width of a spectrum of 90-130nm, and a light color in a quadrilateral area enclosed by four points A1(0.42, 0.48), A2 (0.42, 0.57), A3(0.37, 0.62) and A4(0.37, 0.53) on a 1931 CIE chromaticity diagram;

the third light-emitting unit comprises a third LED chip, a third packaging body covering the third LED chip and a second phosphor, wherein the second phosphor is configured to be excited by the third LED chip to emit light with a peak wavelength of 620-645nm, a half width of a spectrum of 60-100nm, and light color in a quadrilateral area enclosed by four points B1(0.70, 0.30), B2(0.64, 0.36), B3(0.64, 0.34) and B4(0.70, 0.28) on a 1931 CIE chromaticity diagram;

the light emitted by the first light emitting unit, the second light emitting unit and the third light emitting unit is mixed to form white light.

Preferably, the second LED chip and the third LED chip are blue LED chips having a peak wavelength of 447.5-455 nm.

Preferably, a difference between a peak wavelength of the first LED chip and peak wavelengths of the second LED chip and the third LED chip is equal to or greater than 5 nm.

Preferably, the first phosphor at least comprises two green phosphors with different peak wavelengths, one of the peak wavelengths is located at 515-540nm, and the other peak wavelength is located at 540-565 nm.

Preferably, the second phosphor comprises at least one red phosphor having a peak wavelength at 645nm and 620.

Preferably, 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 1%.

Preferably, the light source module is a packaged chip and includes a main body portion, a first accommodating groove, a second accommodating groove and a third accommodating groove are formed in the main body portion, the first LED chip, the second LED chip and the third LED chip are respectively disposed in the first accommodating groove, the second accommodating groove and the third accommodating groove and respectively provided with a pair of pins, the pins are electrically isolated from one another, the first phosphor is disposed in the second accommodating groove, the second phosphor is disposed in the third accommodating groove, and the first package body, the second package body and the third package body respectively fill the first accommodating groove, the second accommodating groove and the third accommodating groove and cover the first LED chip, the second LED chip and the third LED chip.

Preferably, the color temperature of the white light emitted by the light source module is 1600-16000K, and the color deviation Duv from the black body radiation line is less than 0.001.

Preferably, the color temperature of the white light emitted by the light source module is 1600-16000K, and the color rendering index CRI is greater than 80.

Preferably, when the color temperature of the white light emitted by the light source module is 2700-.

The utility model also provides an illumination system, a serial communication port, include: a light source and a driving circuit, wherein,

the light source comprises at least one light source module;

the driving circuit is electrically connected to and supplies power to the first light emitting unit, the second light emitting unit, and the third light emitting unit, and the driving circuit controls current/voltage supplied to the first light emitting unit, the second light emitting unit, and the third light emitting unit, respectively.

Preferably, the driving circuit includes:

the power supply conversion module converts an external power supply into a direct-current power supply required by the light source module;

the control module generates a control signal;

and the LED driving module is used for receiving the direct-current power supply output by the power conversion module and the control signal transmitted by the control module, adjusting the direct-current power supply according to the control signal, and is respectively and electrically connected with the first light-emitting unit, the second light-emitting unit and the third light-emitting unit and outputting driving current/voltage required by each adjusted light-emitting unit to the LED driving module.

Preferably, the control signal is a PWM signal.

Preferably, the control module comprises a communication module for receiving dimming/toning commands from the outside and generating the control signal according to the dimming/toning commands.

Preferably, the control module includes a storage module storing preset control parameter values, where the control parameter values are control parameter values corresponding to the first light emitting unit, the second light emitting unit, and the third light emitting unit when the light source module generates different color temperatures, and the light source module has a color temperature range of 1600-.

Preferably, the light source module is controlled according to the control parameter value, and the color rendering index CRI of the obtained white light is greater than 80 in the color temperature range of 1600-16000K, and is greater than 90 in the color temperature range of 2700-6500K.

Preferably, the light source includes more than two light source modules, and the first light emitting unit, the second light emitting unit, and the third light emitting unit in each light source module are respectively connected in series and then electrically connected to the LED driving module.

The utility model also provides a lamps and lanterns, a serial communication port, include as above the light source module, or include as above lighting system.

The utility model provides a light source module, its luminous intensity of monochromatic luminescence unit of three different photochromic in the module can be controlled independently respectively, can make up the white light that forms different colour temperatures after mixing the light, and 1600-. Due to the selection of the combination of the single-color light-emitting units with specific colors, the distribution locus of the color point of white light can follow the black body radiation line at each color temperature after light mixing. In each monochromatic light emitting unit, the characteristic of wider FWHM of the fluorescent powder is utilized to ensure that the white light generated by the mixed light has expected color rendering and higher color reproducibility.

Drawings

Fig. 1 is a schematic structural diagram of a light source module according to a preferred embodiment of the present invention;

fig. 2 is a color point distribution diagram of a second light emitting unit and a third light emitting unit on a CIE1931 chromaticity diagram in the light source module according to the preferred embodiment of the present invention;

fig. 3 is a diagram illustrating a spectral energy distribution of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit in the light source module according to the preferred embodiment of the present invention;

fig. 4 is a spectral energy distribution diagram of the light source module according to the preferred embodiment of the present invention at a target color temperature 2700K;

FIG. 5 is a diagram of spectral energy distribution when the target color temperature of the light source module is 4000K according to the preferred embodiment of the present invention;

FIG. 6 is a diagram of the spectral power distribution when the target color temperature of the light source module is 6500K according to the preferred embodiment of the present invention;

FIG. 7 is a diagram illustrating the spectral power distribution of the light source module according to the preferred embodiment of the present invention at target color temperatures of 1600K and 16000K;

fig. 8 is a schematic structural diagram of a lighting system according to a preferred embodiment of the present invention;

fig. 9a, 9b, 9c, and 9d are schematic views of the package structure of the light source module according to other preferred embodiments of the present invention;

fig. 10 is a schematic structural view of a lamp according to a preferred embodiment of the present invention.

Detailed Description

The light source module, the lighting system and the lamp according to the present invention will be described in further detail with reference to the accompanying drawings and some preferred embodiments consistent with the present invention.

The utility model discloses a concrete implementation of light source module is a white light LED encapsulation chip of mixing light, and the packaging form can be PLCC paster encapsulation, ceramic paster encapsulation, CSP encapsulation, unification monomer paster encapsulation or COB chip integrated form encapsulation more, and this application does not limit to this.

As shown in fig. 1, the light source module includes a main body 60 and a plurality of light emitting units, namely a first light emitting unit 100, a second light emitting unit 200 and a third light emitting unit 300, disposed on the main body 60 and spaced apart from each other. Each of the

light emitting units

100, 200, 300 includes an

LED chip

101, 201, 301 and a

package

102, 202, 302 covering the same. The LED Chip (LED Chip) comprises a forward mounting structure or an inverted mounting structure, and a single LED Chip or a plurality of LED chips are connected together in series, parallel or series-parallel. In this embodiment, in order to accommodate the

packages

102, 202, 302, the main body 60 is a plastic bracket, and a plurality of

accommodating grooves

61, 62, 63 are formed therein. The plastic bracket may be made of any one of PPA, PCT, and EMC. The LED chips 101, 201, and 301 are respectively disposed in the receiving

grooves

61, 62, and 63, and each has a pair of

leads

51a, 51b, 52a, 52b, 53a, and 53b, and the

leads

51a, 51b, 52a, 52b, 53a, and 53b are electrically isolated from each other. The

package bodies

102, 202, 302 are made of silicone-based resin, epoxy resin, or a combination thereof, and are respectively filled in the receiving

grooves

61, 62, 63 and cover the

LED chips

101, 201, 301 to ensure electrical isolation between the light emitting

units

100, 200, 300.

The first light emitting unit 100 includes a first LED chip 101 and a first package 102. The first LED chip 101 is placed at the bottom of the first receiving groove 61 and electrically connected to the outside through the two

pins

51a and 51 b. The first package body 102 fills the first receiving groove 61 and covers the first LED chip 101. The first LED chip 101 is a blue LED, and emits blue light having a peak wavelength in the range of 455-462.5 nm.

And a second light emitting unit 200 including a second LED chip 201 and a second package 202. The second LED chip 201 is placed at the bottom of the second receiving groove 62 and is electrically connected to the outside through the two

pins

52a, 52 b. The second package body 202 fills the second receiving groove 62 and covers the second LED chip 201. The second LED chip 201 is a blue LED, emitting blue light having a peak wavelength in the range of 447.5-455 nm. The second encapsulant 202 contains a first phosphor 203, and the first phosphor 203 comprises at least two kinds of green phosphors with different peak wavelengths, wherein one peak wavelength is located at 515-540nm, and the other peak wavelength is located at 540-565 nm. The green phosphor can be selected from aluminate system phosphor Lu ₃ Al ₅ O ₁₂ :Ce ³⁺ 、Y ₃ (Al,Ga) ₅ O ₁₂ :Ce ³⁺ Any one of them. The mixed phosphor combination is excited by the second LED chip 202, the peak wavelength of the emitted light is 535-550nm, the half width of the spectrum is 90-130nm, the color of the light is yellow-green, and the light is located in a quadrilateral region enclosed by four points a1(0.42, 0.48), a2 (0.42, 0.57), A3(0.37, 0.62) and a4(0.37, 0.53) on the 1931 CIE chromaticity diagram, i.e., the region a indicated in fig. 2. Since most of the energy emitted from the second LED chip 201 is converted into yellow-green light by the first phosphor 203, the blue light emitted from the second light emitting unit 200 has a content of less than 10%. The blue light content is less than 10%, which means that the energy in the region of 440-480nm in the blue light band is less than 10% of the total energy in the light emitted by the light-emitting unit.

In the embodiment of fig. 1, the first phosphor 203 and the second encapsulant 202 are mixed to fill the second receiving groove 62, and other forms may be adopted for specific encapsulation. In another preferred embodiment, as shown in fig. 9a, after the placement of the second LED chip 201 is completed, the electrical connection is made with the outside through the pins 54a, 54 b. The first phosphor 203 is first spread on the surface of the second LED chip 201 by spraying or coating, and then the second receiving groove 62 is filled with the second package 202. In fig. 9b, the second container 62, in which the second LED chip 201 is already placed, is filled with the second package 202, and then the first phosphor 203 is spread on the upper surface of the second package 202 by spraying or coating. The above two packaging manners are the same as the embodiment of fig. 1, and still are the packaging structures including the support, while the packaging structures of fig. 9c and 9d are more different from the embodiment of fig. 1. Fig. 9c shows a ceramic high-power package method, in which a ceramic or metal material is used as the substrate 94, the second LED chip 201 is disposed on the substrate 94, the first phosphor 203 is formed on the surface of the second LED chip 201 by spraying, fluorescent film pressing or fluorescent ceramic sheet mounting, and then the second package 202 is filled with the first phosphor 203 and the second LED chip 201 by mold injection. Fig. 9d shows a CSP package, which is suitable for high-power chip, and is formed by mixing a first phosphor 203 and a second encapsulant 202 on a substrate 94, and then forming a light conversion layer on the surface of a second LED chip 201 by means of a fluorescent film lamination. The above embodiments can achieve the object of the present invention, and the present invention is not limited thereto.

And a third light emitting unit 300 including a third LED chip 301 and a third package 302. The third LED chip 301 is placed at the bottom of the third receiving groove 63 and electrically connected to the outside through the two

pins

53a, 53 b. The third encapsulant 302 fills the third receiving groove 63 and covers the third LED chip 301. The third LED chip 301 is a blue LED, and emits blue light having a peak wavelength in the range of 447.5-455 nm. The third package 302 contains a second phosphor 303, and the second phosphor 303 at least comprises a red phosphor with a peak wavelength of 645nm and 620. The red phosphor can be nitride system phosphor (Sr, Ca) SiAlN ₃ :Eu ²⁺ Ren inThe method is as follows. The second phosphor 303 is excited by the third LED chip 302, and emits light with a peak wavelength of 620-645nm, a half width of the spectrum of 60-100nm, and a red color, which is located in a quadrilateral region surrounded by four points B1(0.70, 0.30), B2(0.64, 0.36), B3(0.64, 0.34), and B4(0.70, 0.28) on the 1931 CIE chromaticity diagram, i.e., the B region indicated in fig. 2. Since most of the energy emitted from the third LED chip 301 is converted into red light by the second phosphor 303, the blue light emitted from the third light emitting unit 300 has a blue light content of less than 1%.

The third light emitting unit 300 may also be packaged as shown in fig. 9a to 9d, which is not limited in this application.

The spectral energy distributions of the first light emitting unit 100, the second light emitting unit 200, and the third light emitting unit 300 are shown in fig. 3, and the lights emitted from them are mixed to form white light. By selecting the monochromatic light emitting units with specific light colors and performing dimming control on the monochromatic light emitting units, the color temperature coverage range of the white light emitted by the light source module in the embodiment is wide, from 1600-. Meanwhile, the color rendering index CRI is larger than 90 when the color temperature is 2700-.

In the above embodiment, it can be seen that although the first LED chip 101, the second LED chip 201, and the third LED chip 301 are all blue light chips, LEDs with different peak wavelengths are selected. The full-width half-maximum (FWHM) of the phosphor is generally distributed widely in the aspect of the full-width half-maximum (FWHM), namely, the half-width of the spectrum, and the FWHM of the monochromatic LED chip is narrow. In the embodiment, the green light and the red light are both emitted by the fluorescent powder, so that energy distribution of each wavelength in the two wave bands can be ensured, and good color rendering property is ensured. In the blue light part, under the condition that the FWHM of the LED chip is narrow, the chips with different peak wavelengths are selected to form a superposition mode in a blue light wave band, so that the overall energy distribution of the blue light region is more uniform, and the color rendering property is better. In the embodiment, two kinds of LED chips are selected, the first LED chip 101 is a first kind, the peak wavelength is between 455 and 462.5nm, the second LED chip 201 and the third LED chip 301 are the same type and are a second kind, and the peak wavelength is between 447.5 and 455 nm. In a preferred embodiment, the difference between the peak wavelengths of the two LED chips is greater than or equal to 5 nm. In other preferred embodiments, the first LED chip 101, the second LED chip 201, and the third LED chip 301 can be different, so that the FWHM can be wider. However, because each LED chip in the light source module is individually powered and individually controlled, the excessive selection of the LEDs may make the setting in the aspect of control more complicated, and particularly, the selection may be flexibly selected according to the design requirements.

Another preferred embodiment of the present invention is a lighting system as shown in fig. 8, which includes the light source module 1 and the driving circuit 2 in the above embodiments.

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 supply, and converts the external power supply into a dc power supply required by the light source module 1. The control module 22 includes a communication module for receiving dimming/toning commands from the outside and generating control signals accordingly. The communication module can be a wired or wireless communication module, and the utility model discloses do not limit this. The LED driving module 23 inputs the dc power outputted by the power conversion module 21 and the control signal transmitted by the control module 22, adjusts the dc power according to the control signal, and respectively outputs driving current/voltage required by each of the adjusted light emitting units to the first light emitting unit 100, the second light emitting unit 200, and the third light emitting unit 300 in the light source module 1. Therefore, the LED driving module 23 needs to be electrically connected to the first light emitting unit 100, the second light emitting unit 200, and the third light emitting unit 300, respectively. When the lighting system includes a plurality of light source modules 1, as shown in fig. 8, the first light emitting unit 100, the second light emitting unit 200, and the third light emitting unit 300 in each light source module 1 are respectively connected in series and then electrically connected to the LED driving module 23.

As described above, in the embodiment, the adjustable range of the color temperature of the light source module 1 is from 1600-. The control parameter value may be a voltage value, a current value or a PWM signal. When the color temperature change requirement is sent from the outside, the control module 22 receives the command, reads the correlation value in the storage module, forms a control signal, sends the control signal to the LED driving module 23, and adjusts 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 the white light with the corresponding color temperature, and ensures that the color deviation Duv between the white light and the black body radiation line is less than 0.001. Compared with the prior art, the light source module 1 in the embodiment can obtain better color rendering property by selecting the light emitting unit with a specific color, and can ensure that the color rendering index CRI of the finally obtained white light is greater than 80 in the color temperature range of 1600-16000K and is greater than 90 in the color temperature range of 2700-6500K through presetting control parameter values.

In this embodiment, the control signal is a PWM signal, the light emitting units of three colors are independently controlled by a PWM dimming manner, and different duty ratios are applied to modulate the light emitting power of each light emitting unit to achieve a light mixing effect. The duty ratios of the PWM signals of the three light emitting units at different color temperatures, and the color rendering index CRI and the color deviation Duv of the correlated color temperature are listed in table 1. The relative spectral patterns of the light source module 1 at the respective color temperatures listed in the tables are shown in fig. 4, 5, 6, and 7. Fig. 4 shows a target color temperature 2700K, fig. 5 shows a target color temperature 4000K, fig. 6 shows a target color temperature 6500K, and fig. 7 shows relative spectral diagrams of

target color temperatures

1600K and 16000K.

TABLE 1

As can be seen from Table 1, compared with the conventional multi-chip light mixing scheme, the range of adjustable color temperature is larger, which can be from 1600-. The common two different color temperature white light mixing schemes have adjustable intervals only between two selected color temperatures and have smaller ranges. For example, with the lamp beads with the two color temperatures of 2000K and 4000K, the range of the adjustable color temperature is only between 2000 and 4000K. It should be further considered that the color point of the white light is distributed in a curve form on the 1931 CIE chromaticity diagram, which can only ensure that the light colors of the two white light chips participating in the light mixing are on the curve, and other mixed color temperatures can deviate from the curve, thereby generating color deviation. In this case, if two types of white chips having a large difference in color temperature, for example, 2000K and 6500K are selected, although a wider adjustable range of color temperature can be achieved, the position of the intermediate color temperature, for example, 4000K, is shifted too far from the black body radiation curve, resulting in color deviation. And the utility model provides a mix light scheme, what make through two kinds of types of blue light chip and yellow green and red phosphor powder has as above characteristic peak wavelength, FWHM and color coordinate range's blue light, yellow green light and ruddiness luminescence unit, light source module 1 that its is constituteed, can carry out arbitrary mixing of colors in the scope that the color point coordinate that three luminescence unit corresponds is injectd in CIE1931 chromaticity diagram, the white light luminescence light source colour temperature range of its mixture is wide, can reach 1600K to 16000K, and corresponding white light color point distribution track can follow the radiation black body completely, its colour deviation Duv is steerable within 0.001 or even lower.

Meanwhile, as can be seen from table 1, when the light source module 1 has better color rendering property, the color rendering index CRI is greater than 80 in the range of 1600-. Compared with the existing light mixing scheme of the RGB three-color LED, the FWHM of the LED chips adopted by the RGB three colors in the prior art is narrow, and good color rendering property can not be realized at various color temperatures. The following table shows that, in the existing RGB three-color LED light mixing scheme, different LED types are combined with color rendering indexes CRI at different color temperatures.

TABLE 2

As can be seen from table 2, in each comparative example, only comparative example 3 can achieve the color rendering index of 90 or more at two color temperatures, and each comparative example cannot achieve the effect of achieving the color rendering index CRI of 90 or more in all of the 2700-. It can be seen that in the light source module of the present invention, the second light emitting unit 200 and the third light emitting unit 300 adopt phosphor to emit light, and select a specific light color, thereby realizing a color rendering effect superior to that of the prior art.

The light source module and the lighting system can be applied to various lamps, and fig. 10 shows a lamp D1 according to a preferred embodiment of the present application. The lamp D1 is a lamp panel, and includes the above-mentioned lighting system, and in other preferred embodiments, it may be a ceiling lamp, or the light source module 1 may also be applied to various lamps such as a desk lamp, a down lamp, a spot lamp, etc. as a common white light chip. The lamp D1 includes a chassis 86, a face frame 88 provided with a diffusion plate 89, and a plurality of light source module 1 power supply boxes 87 provided on the light source plate 85, and the drive circuit 2 is provided in the power supply boxes 87. In the lamp, the first light-emitting unit 100, the second light-emitting unit 200 and the third light-emitting unit 300 in the light source module 1 are respectively wired, and the similar light-emitting units in the light source modules 1 are connected in series and then connected to the driving circuit 2 in the power box 87, so as to form the lighting system. The luminaire D1 may also have a controller, a heat sink, a light distribution component, etc. depending on the function and requirements of the particular luminaire. The controller may be used to adjust the color and intensity of the light emitted from the light source module L1, and the light distribution component may be a lampshade, a lens, a diffusion element, a light guide, etc. besides the diffusion plate in the embodiment. The utility model discloses do not limit to this.

The foregoing description of the preferred embodiments of the invention has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously, many modifications and variations may be made which will be apparent to those skilled in the art and are intended to be included within the scope of the invention as defined by the following claims.

Claims

1. A light source module is characterized by comprising a first light-emitting unit, a second light-emitting unit and a third light-emitting unit which are electrically independent from each other;

the second light-emitting unit comprises a second LED chip, a second packaging body covering the second LED chip and a first fluorophor, wherein the first fluorophor is configured to be excited by the second LED chip and can emit light with the peak wavelength of 535-550nm, the half width of the spectrum of 90-130nm, and the light color in a quadrilateral area formed by four points of A1(0.42 and 0.48), A2 (0.42 and 0.57), A3(0.37 and 0.62) and A4(0.37 and 0.53) on a 1931 CIE chromaticity diagram;

2. The light source module of claim 1, wherein the second LED chip and the third LED chip are blue LED chips having a peak wavelength of 447.5-455 nm.

3. The light source module according to claim 2, wherein a difference between a peak wavelength of the first LED chip and peak wavelengths of the second LED chip and the third LED chip is equal to or greater than 5 nm.

4. The light source module as claimed in claim 1, wherein the first phosphor comprises at least two green phosphors with different peak wavelengths, one of the two green phosphors has a peak wavelength at 515-540nm, and the other one of the two green phosphors has a peak wavelength at 540-565 nm.

5. The light source module as claimed in claim 1, wherein the second phosphor comprises at least one red phosphor with a peak wavelength at 645nm and 620 nm.

6. The light source module of claim 2, wherein 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 1%.

7. The light source module of claim 1, wherein the light source module is a packaged chip, and comprises a main body portion, the main body portion has a first receiving slot, a second receiving slot and a third receiving slot, the first LED chip, the second LED chip and the third LED chip are respectively disposed in the first receiving slot, the second receiving slot and the third receiving slot, and each has a pair of pins, the pins are electrically isolated from each other, the first phosphor is disposed in the second receiving slot, the second phosphor is disposed in the third receiving slot, and the first package, the second package and the third package respectively fill the first receiving slot, the second receiving slot and the third receiving slot and cover the first LED chip, the second LED chip and the third LED chip.

8. The light source module as claimed in any one of claims 1-7, wherein the color temperature of the white light emitted from the light source module is 1600-16000K, and the color deviation Duv from the black body radiation line is less than 0.001.

9. The light source module as claimed in claim 8, wherein the color rendering index CRI of the white light emitted from the light source module is greater than 80 at 1600-16000K.

10. The light source module as claimed in claim 9, wherein the color rendering index CRI of the white light emitted from the light source module is greater than 90 when the color temperature of the white light is 2700-.

11. An illumination system, comprising: a light source and a driving circuit, wherein,

the light source comprises at least one light source module set according to any one of claims 1 to 10;

12. The illumination system of claim 11, wherein the drive circuit comprises:

the control module generates a control signal;

13. The lighting system of claim 12, wherein the control signal is a PWM signal.

14. The lighting system of claim 12, wherein the control module comprises a communication module for receiving externally transmitted dimming/toning commands and generating the control signal accordingly.

15. The illumination system of claim 12, wherein the control module comprises a storage module storing preset control parameter values, the control parameter values are corresponding control parameter values of the first light emitting unit, the second light emitting unit and the third light emitting unit when the light source module generates different color temperatures, the color temperature range of the light source module is 1600-16000K, the control parameter values enable the color deviation Duv of the white light and the black body radiation line of the light source module at the corresponding color temperatures to be less than 0.001, and the control module reads the control parameters to generate the control signal.

16. The illumination system as recited in claim 15, wherein the light source module is controlled according to the control parameter values, and the color rendering index CRI of the obtained white light is greater than 80 in the color temperature range of 1600-16000K and greater than 90 in the color temperature range of 2700-6500K.

17. The illumination system of claim 12, wherein the light source comprises more than two light source modules, and the first light emitting unit, the second light emitting unit, and the third light emitting unit in each light source module are respectively connected in series and then electrically connected to the LED driving module.

18. A luminaire comprising a light source module according to any one of claims 1 to 10 or comprising a lighting system according to any one of claims 11 to 17.