Illuminating light source and illuminating device

Abstract

The invention discloses a lighting source and a lighting device. The illumination light source comprises at least one light emitting diode chip emitting light of at least two wave bands; the emergent light at least comprises a plurality of wavelengths in the wave band of 420-740 nm and has spectral continuity; and the optical fiber at least comprises two characteristic wavelengths, and the two characteristic wavelengths comprise at least one of the wavelength of 470-520 nm and the wavelength of 540-600 nm. The light-emitting diode chip capable of emitting at least two wave bands is adopted to obtain the illumination light source, the full-spectrum continuity characteristic is achieved, the color rendering indexes R1-R15 are very high, the reduction degree of an article at night is very high, the recognition capacity of travelers at night is improved, the illumination light source further has several prominent characteristic wavelengths on the basis of the full spectrum, and the illumination light source has the good illumination effect. The LED lamp has the advantages of being high in light and shade visual lighting effect, high in road surface reflectivity, high in rain, fog and haze penetrability and high in alertness, the outdoor lighting safety is comprehensively considered, and the night travel safety is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of lighting technology, and in particular to a lighting light source and a lighting device. Background Art

[0002] In the field of outdoor lighting applications, lighting sources have evolved from incandescent lamps, mercury lamps, high-pressure sodium lamps, to light-emitting diodes (LEDs). LED light sources offer advantages such as energy conservation and environmental protection, long service life, and high luminous efficiency. Compared to previous light sources, their luminous efficacy and color rendering index have been significantly improved, leading to their widespread use in the lighting field.

[0003] However, existing LED outdoor lighting sources do not take into account the weakening of cone cells under nighttime illumination (20lx), and still refer to indoor lighting standards, overemphasizing photopic visual effects. In addition, the safety of outdoor lighting is not fully considered when designing the light source. Summary of the Invention

[0004] An embodiment of the present invention provides a lighting source and a lighting device, which uses a light-emitting diode chip that can emit at least two wavelengths to obtain a lighting source. The lighting source has a full-spectrum continuity characteristic, and its color rendering index R1 to R15 are all very high, so that the restoration degree of objects at night is also very high, improving the recognition ability of night travelers. Furthermore, the lighting source has several prominent characteristic wavelengths on the basis of the full spectrum. The prominent characteristic wavelength refers to a wavelength whose light power accounts for greater than or equal to 10% of the total light power, so that it has high light efficiency in light and dark vision, high road reflectivity, high penetration of rain, fog, and haze, and high alertness. It comprehensively considers outdoor lighting safety and ensures the safety of night travel.

[0005] According to one aspect of the present invention, there is provided a lighting source comprising at least one light emitting diode chip, wherein the light emitting diode chip emits light in at least two wavelength bands;

[0006] The outgoing light of the illumination light source contains at least multiple wavelengths in the 420nm to 740nm band and has spectral continuity, the interval between two adjacent wavelengths is 5nm to 60nm, and the half-peak width of each wavelength ranges from 10nm to 60nm;

[0007] The outgoing light of the illumination light source further includes a characteristic wavelength, wherein the characteristic wavelength is a wavelength at which the proportion of light power to total light power is greater than or equal to 10%; the characteristic wavelength includes at least a first characteristic wavelength and a second characteristic wavelength, wherein the first characteristic wavelength includes at least one wavelength in the 470nm to 520nm band, and the second characteristic wavelength includes at least one wavelength in the 540nm to 600nm band.

[0008] Optionally, the proportion of the optical power corresponding to the first characteristic wavelength to the total optical power is ≥10%, and the proportion of the optical power corresponding to the second characteristic wavelength to the total optical power is ≥20%.

[0009] Optionally, the characteristic wavelength further includes a third characteristic wavelength, and the third characteristic wavelength includes at least one wavelength in the 600nm to 660nm band.

[0010] Optionally, the proportion of the optical power corresponding to the third characteristic wavelength to the total optical power is ≥20%.

[0011] Optionally, the first characteristic wavelength includes a first sub-characteristic wavelength and a second sub-characteristic wavelength, the first sub-characteristic wavelength is located in a wavelength band of 485 nm to 495 nm, and the second sub-characteristic wavelength is located in a wavelength band of 500 nm to 510 nm;

[0012] The second characteristic wavelength includes a third sub-characteristic wavelength and a fourth sub-characteristic wavelength, the third sub-characteristic wavelength is located in the 540nm to 570nm band, and the fourth sub-characteristic wavelength is located in the 570nm to 600nm band;

[0013] The proportion of the optical power corresponding to the first sub-characteristic wavelength, the second sub-characteristic wavelength, the third sub-characteristic wavelength and the fourth sub-characteristic wavelength to the total optical power is ≥10%.

[0014] Optionally, the first characteristic wavelength is located in a band of 485 nm to 505 nm, and the second characteristic wavelength is located in a band of 565 nm to 590 nm.

[0015] Optionally, the proportion of optical power corresponding to the first characteristic wavelength to the total optical power is ≥10%, the proportion of optical power corresponding to the second characteristic wavelength to the total optical power is ≥30%, and the proportion of optical power corresponding to the third characteristic wavelength to the total optical power is ≥30%.

[0016] Optionally, the emitted light of the illumination light source further includes light in the 400nm to 420nm band and / or light in the 740nm to 1.7μm band.

[0017] Optionally, the light-emitting diode chip includes an N-type semiconductor layer, a P-type semiconductor layer, and a first light-emitting layer and a second light-emitting layer disposed between the N-type semiconductor layer and the P-type semiconductor layer, wherein the first light-emitting layer is located on a side of the second light-emitting layer close to the P-type semiconductor layer;

[0018] The first light-emitting layer generates light of at least one wavelength band in an electroluminescent manner, and the light generated by the first light-emitting layer excites the second light-emitting layer to generate light of at least one wavelength band.

[0019] Optionally, the wavelength band corresponding to the light generated by the first light-emitting layer includes at least one of a purple wavelength band, a blue wavelength band, a cyan wavelength band, and a green wavelength band;

[0020] The wavelength band corresponding to the light generated by the second light-emitting layer includes at least one of the purple wavelength band, the blue wavelength band, the cyan wavelength band, the green wavelength band, the yellow wavelength band, the red wavelength band and the infrared wavelength band;

[0021] At least one wavelength of light generated by the first light-emitting layer is smaller than all wavelengths of light generated by the second light-emitting layer.

[0022] Optionally, the lighting source includes a light emitting diode chip, and the light generated by the light emitting diode chip after packaging forms the output light of the lighting source.

[0023] Optionally, the lighting source includes at least two light-emitting diode chips, and light generated by the at least two light-emitting diode chips after packaging is mixed to form the output light of the lighting source.

[0024] Optionally, at least one single-wavelength chip is further included, and the single-wavelength chip generates light of a single wavelength.

[0025] Optionally, light generated by packaging at least one of the light-emitting diode chips and at least one of the single-wavelength chips is mixed to form output light of the illumination light source.

[0026] Optionally, a color conversion layer is further included, and the color conversion layer is arranged on the light-emitting side of at least part of the light-emitting diode chip.

[0027] Optionally, light generated after at least one of the light-emitting diode chips and the color conversion layer are packaged is mixed to form output light of the illumination light source.

[0028] Optionally, the color conversion layer includes at least one color conversion material, and the wavelengths of light converted by each color conversion material are different.

[0029] Optionally, the color conversion material includes a quantum dot material or a fluorescent material, and the light converted by the color conversion material is in a blue band, a green band, a cyan band, a yellow band, a red band or an infrared band.

[0030] Optionally, the illumination light source further includes at least one single-wavelength chip and a color conversion layer, the single-wavelength chip generates light of a single wavelength, and the color conversion layer is arranged on the light-emitting side of the light-emitting diode chip and / or the single-wavelength chip.

[0031] Optionally, light generated by encapsulating at least one of the light-emitting diode chips, at least one of the single-wavelength chips, and the color conversion layer is mixed to form output light of the illumination light source.

[0032] According to another aspect of the present invention, a lighting device is provided, comprising the above-mentioned lighting source.

[0033] Optionally, an insect repellent light source is further included, and the insect repellent light source emits light in the wavelength band of 560nm to 600nm.

[0034] Optionally, the insect repellent light source and the lighting light source are electrically connected to the same lighting lamp body or electrically connected to different lighting lamp bodies.

[0035] The lighting source provided by an embodiment of the present invention includes at least one light-emitting diode chip, which emits light in at least two wavelength bands. The emitted light of the lighting source includes at least multiple wavelengths in the 420nm to 740nm band and has spectral continuity, with an interval of 5nm to 60nm between two adjacent wavelengths, and a half-peak width of each wavelength in the range of 10nm to 60nm. On this basis, it also includes a prominent characteristic wavelength, the optical power of the prominent characteristic wavelength accounts for greater than or equal to 10% of the total optical power, and the characteristic wavelengths include at least a first characteristic wavelength and a second characteristic wavelength, the first characteristic wavelength includes at least one wavelength in the 470nm to 520nm band, and the second characteristic wavelength includes at least one wavelength in the 540nm to 600nm band. By setting up a light-emitting diode chip that can emit at least two wavelengths, a lighting light source is obtained. The lighting light source has the characteristics of full-spectrum continuity, and its color rendering index R1 to R15 is very high, so that the restoration degree of objects at night is also very high; further, the lighting light source has several prominent characteristic wavelengths, among which the light of the first characteristic wavelength can effectively improve the dark vision light effect, so that night travelers have high alertness and improve the recognition ability of night travelers, thereby greatly improving the safety of night travel; the light of the second characteristic wavelength can effectively improve the bright vision light effect, improve the penetration of rain, fog, and haze and the reflectivity of the road surface, so that night travelers, especially those traveling in bad weather at night, can see farther and see objects more clearly, thereby improving outdoor safety; it can also include a third characteristic wavelength, and the light of the third characteristic wavelength can further improve the penetration of rain, fog, and haze, so that night travelers, especially those traveling in bad weather at night, can see farther and see objects more clearly, thereby improving outdoor safety.

[0036] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A schematic diagram of a spectrum of an illumination source in the related art;

[0039] Figure 2 Schematic diagram of the human eye's light and dark visual response;

[0040] Figure 3 This is a schematic diagram of the human body's physiological rhythm;

[0041] Figure 4 Schematic diagram of spectral reflectance of different road surfaces;

[0042] Figure 5 Schematic diagram of the scattering curve of light of different wavelengths;

[0043] Figure 6 and Figure 7 They are the spectrum schematic diagrams corresponding to Table 5;

[0044] Figure 8 Schematic diagram of the spectrum corresponding to Table 6;

[0045] Figure 9 A schematic structural diagram of a light-emitting diode chip provided by an embodiment of the present invention;

[0046] Figure 10 A schematic structural diagram of an illumination light source provided by an embodiment of the present invention;

[0047] Figure 11 A schematic structural diagram of an illumination light source provided by an embodiment of the present invention;

[0048] Figure 12 A schematic structural diagram of another lighting source provided by an embodiment of the present invention;

[0049] Figure 13 A schematic structural diagram of another lighting source provided by an embodiment of the present invention;

[0050] Figures 14 to 16 They are respectively schematic structural diagrams of another lighting source provided by an embodiment of the present invention;

[0051] Figure 17 A schematic structural diagram of another lighting source provided by an embodiment of the present invention;

[0052] Figures 18 to 22They are schematic structural diagrams of another lighting source provided by embodiments of the present invention. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0054] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0055] Figure 1 This is a schematic diagram of the spectrum of a related art lighting source, commonly used as a streetlight. Its parameters are as follows: color temperature (CCT) = 4000K, color rendering index (Ra) = 70, luminous flux = 365 lm, photopic efficacy = 173 lm / W, scotopic efficacy = 257 lm / W, color coordinates (x, y) = (0.3835, 0.3801), and spectral composition: 450 nm + 540 nm + 610 nm. This light source offers high luminous efficiency and reliability, but for streetlight applications, scotopic efficacy is not considered.

[0056] Some of the existing outdoor lighting sources do not fully consider the actual conditions of nighttime lighting, the recognition characteristics of rod cells, and the dark vision efficiency is not high. In addition, the existing lighting sources do not fully consider the safety of outdoor lighting, and there may be hidden dangers for nighttime travel.

[0057] In order to solve the above problems, the present invention provides a lighting source, including at least one light-emitting diode chip, which emits light in at least two bands; the output light of the lighting source includes at least multiple wavelengths in the 420nm to 740nm band and has spectral continuity, with the interval between two adjacent wavelengths being 5nm to 60nm, and the half-peak width of each wavelength ranging from 10nm to 60nm; on this basis, it also has a prominent characteristic wavelength, which is a wavelength at which the proportion of light power to total light power is greater than or equal to 10%, and the characteristic wavelength includes at least a first characteristic wavelength and a second characteristic wavelength, the first characteristic wavelength includes at least one wavelength in the 470nm to 520nm band, and the second characteristic wavelength includes at least one wavelength in the 540nm to 600nm band.

[0058] Among them, the light-emitting diode chip can be any single-core multi-wavelength chip, and the number of wavelengths, specific wavelengths, characteristic wavelengths and half-peak widths of different wavelengths, and the ratio of light intensities of different wavelengths of the light-emitting diode chip can be selected as needed to form the lighting source of the embodiment of the present invention. Exemplarily, in a certain embodiment, the light-emitting diode chip selects different single-core multi-wavelength chips according to different outdoor safety lighting needs. The characteristic wavelength and half-peak width can be precisely adjusted through multiple different wavelengths, and the ratio of light intensities of different wavelengths can be precisely adjusted, that is, the spectrum design of outdoor safety lighting does not need to be limited by the chip. The single-core multi-wavelength chip can be pure electroluminescence or a light-emitting mechanism that combines electroluminescence and photoluminescence. Preferably, a single-core multi-wavelength chip that combines electroluminescence and photoluminescence is used. More preferably, the photoluminescent layer is built between the P semiconductor and the N semiconductor layer. Single-core, multi-wavelength chips that combine electroluminescence and photoluminescence have the advantage of excellent spectral stability with current changes. Furthermore, the photoluminescent layer in the single-core, multi-wavelength chip is embedded between the P-semiconductor and N-semiconductor layers, enabling both the photoluminescence and electroluminescence wavelengths to have higher external quantum efficiencies than traditional LEDs. This is because the stress in the photoluminescent layer is released early, improving the external quantum efficiency of the electroluminescent layer. Furthermore, the photoluminescent layer's own crystal quality is high, and multiple reflections and absorptions between the PN junctions result in a higher external quantum efficiency than traditional chips. LED chips can be obtained through packaging, which offers multiple packaging methods. The packaging process is simple, the driving method is simple, and the control method is simple, facilitating cost control. It is also easy to obtain the illumination spectrum of the illumination source provided by the embodiments of the invention. Furthermore, the size of the multi-wavelength chip and LED chip set can be flexibly adjusted, reducing costs and improving reliability and service life. The inventors have discovered that light in the wavelength band of the first characteristic wavelength λ1 can improve dark vision efficiency. Optionally, the proportion of light power corresponding to the first characteristic wavelength λ1 to the total light power is ≥10%. In specific implementations, λ1 can be multiple different characteristic wavelengths λ1. 1a / λ 1b / λ1c ...; The light in the wavelength band of the second characteristic wavelength λ2 can improve the photopic visual effect. Optionally, the light power corresponding to the second characteristic wavelength λ2 accounts for ≥ 20% of the total light power. In specific implementation, λ2 can be multiple different characteristic wavelengths λ 2a / λ 2b / λ 2c ……. Figure 2 This is a diagram of the human eye's light and dark visual response, reference Figure 2 It can be seen that the human eye is most sensitive to light in the 555nm band in a photopic vision environment and is most sensitive to light in the 505nm band in a scotopic vision environment. Therefore, in a possible implementation, λ1 includes a characteristic wavelength of 505nm to further improve the scotopic vision light effect, and λ2 includes a characteristic wavelength of 555nm to further improve the photopic vision light effect. Among them, the ambient illumination of scotopic vision satisfies <10 -3 cd / m 2 , the ambient illumination for bright vision meets the requirement of >3cd / m 2 .

[0059] in addition, Figure 3 This is a diagram of the human body's physiological rhythm, for reference Figure 3 Light with higher Equivalent Melanopic Lux (EML) will increase alertness, while light with lower EML will promote melatonin secretion and reduce alertness. The first characteristic wavelength λ1 is set to be prominent, and the light power accounts for more than 10% of the total light power, so that the outdoor lighting source has high alertness and improves outdoor safety.

[0060] The second characteristic wavelength λ2 can improve the road surface reflectivity. Figure 4 Schematic diagram of spectral reflectance of different road surfaces. Figure 4 Cited from Zhang Yingxue's "Analysis of Pavement Material Differentiation Based on Spectral Features" published in 2017, different characteristic wavelengths can be selected for different road sections. For example, for asphalt concrete sections, 540nm~600nm can be selected, and for cement concrete sections, 580nm~600nm can be selected.

[0061] In another possible implementation, the characteristic wavelengths may further include a third characteristic wavelength λ3, wherein the third characteristic wavelength λ3 includes at least one wavelength in the 600 nm to 660 nm band. Optionally, the optical power corresponding to the third characteristic wavelength λ3 accounts for ≥ 20% of the total optical power.

[0062] In outdoor lighting, the air is often filled with dust and other particles, while in foggy and rainy environments, mist and rain particles are present. These particles, mist, and rain particles easily scatter light waves, affecting their penetration. When the diameter of the scattering particles in the air is smaller than the wavelength of light, Rayleigh scattering is predominant, and the intensity of Rayleigh scattering is inversely proportional to the fourth power of the wavelength. When the diameter of the scattering particles in the air is approximately equal to the wavelength of light, Mie scattering is predominant, and the intensity of Mie scattering is inversely proportional to the square of the wavelength. Figure 5 is a schematic diagram of the scattering curve of light of different wavelengths, Figure 5 As can be seen, the longer the wavelength, the less scattering and the greater the transmittance of rain and fog. By setting the third characteristic wavelength λ3 and ensuring that the optical power accounts for greater than or equal to 20%, the transmittance of rain, fog, and haze is further improved, and the road surface reflectivity is increased. This allows night travelers, especially those traveling in inclement weather, to see farther and more clearly, improving outdoor safety.

[0063] Optionally, as one of the solutions, referring to Table 1, the first characteristic wavelength λ1 includes the first sub-characteristic wavelength λ 1a and the second sub-characteristic wavelength λ 1b , the first sub-characteristic wavelength λ 1a Located in the 485nm~495nm band, the second sub-characteristic wavelength λ 1b Located in the 500nm~510nm band; the second characteristic wavelength λ2 includes the third sub-characteristic wavelength λ 2a and the fourth sub-characteristic wavelength λ 2b , the third sub-characteristic wavelength λ 2a Located in the 540nm~570nm band, the fourth sub-characteristic wavelength λ 2b Located in the 570nm~600nm band; the first sub-characteristic wavelength λ 1a , the second sub-characteristic wavelength λ 1b , the third sub-characteristic wavelength λ 2a and the fourth sub-characteristic wavelength λ 2b The corresponding optical power accounts for ≥10% of the total optical power.

[0064] Setting Lambda 1a In the 485nm~495nm band, and the optical power accounts for more than or equal to 10% of the total optical power, a very high EML can be obtained. Set λ 1b Located in the 500nm~510nm band, it can achieve high dark vision light effect.

[0065] Table 1 is the parameters of solution 1 provided by the embodiment of the present invention

[0066]

[0067] Based on Solution 1, in another implementation, referring to Table 2, the lighting light source further includes a third characteristic wavelength λ3, the third characteristic wavelength λ3 includes at least one wavelength in the 600nm to 660nm band, and the optical power corresponding to the third characteristic wavelength λ3 accounts for ≥20% of the total optical power. This further improves the visibility and dark vision efficiency while further improving the penetration of rain, fog, and haze and the reflectivity of the road surface, allowing night travelers, especially those traveling at night in bad weather, to have a longer sight and clearer vision, thereby improving outdoor safety.

[0068] Table 2 shows the parameters of the second solution provided by the embodiment of the present invention.

[0069]

[0070]

[0071] In another implementation, referring to Table 3, optionally, the first characteristic wavelength λ1 is located in the 485nm~505nm band, and the optical power corresponding to the first characteristic wavelength λ1 accounts for ≥10% of the total optical power, which is beneficial to improving alertness and enhancing dark vision light efficiency, and the second characteristic wavelength λ2 is located in the 565nm~590nm band, and the optical power corresponding to the second characteristic wavelength λ2 accounts for ≥20% of the total optical power, which is beneficial to improving bright vision light efficiency, improving road reflectivity, and improving rain, fog, and haze penetration.

[0072] Table 3 is the parameters of solution 3 provided by the embodiment of the present invention

[0073]

[0074] In another implementation, referring to Table 4, optionally, the first characteristic wavelength λ1 is located in the 470nm~520nm band, and the corresponding optical power accounts for ≥10% of the total optical power, thereby improving alertness and improving dark vision light efficiency, the second characteristic wavelength λ2 is located in the 540nm~600nm band, and the corresponding optical power accounts for ≥30% of the total optical power, thereby improving bright vision light efficiency, improving road surface reflectivity, and improving rain, fog, and haze penetration, the third characteristic wavelength λ3 is located in the 600nm~660nm band, and the corresponding optical power accounts for ≥30% of the total optical power, further improving rain, fog, and haze penetration and road surface reflectivity.

[0075] Table 4 shows the parameters of the fourth solution provided by the embodiment of the present invention.

[0076]

[0077]

[0078] In another possible implementation, in addition to including multiple, continuous wavelengths in the 420nm to 740nm band, the illumination light source may also emit light in the 400nm to 420nm band and / or the 740nm to 1.7μm band. This means that the illumination light source encompasses the full spectrum of wavelengths from violet to infrared, resulting in very high color rendering indices (R1 to R15). This allows for highly accurate rendering of objects at night, improving nighttime traveler identification and significantly enhancing safety. Among them, Ra is the color rendering index. In order to quantitatively evaluate the color rendering of the light source, the standard light source is taken as the standard and its color rendering index is set to 100. The color rendering indexes of the other light sources are all lower than 100, R1 is light gray-red, R2 is dark gray-yellow, R3 is saturated yellow-green, R4 is medium yellow-green, R5 is light blue-green, R6 is light blue, R7 is light purple-blue, R8 is light red-purple, R9 is saturated red, R10 is saturated yellow, R11 is saturated green, R12 is saturated blue, R13 is Caucasian skin color, R14 is leaf green, and R15 is yellow skin color.

[0079] For example, Table 5 shows the parameters of two specific lighting sources provided in the embodiment of the present invention. Figure 6 and Figure 7 The schematic diagrams of the spectra correspond to Table 5, where the horizontal axis represents wavelength and the vertical axis represents intensity. Each embodiment has excellent outdoor lighting effects, emitting white light with a first characteristic wavelength of 500nm, and an optical power that accounts for greater than 10% of the total optical power. This effectively enhances scotopic vision efficiency, while also increasing the alertness of night travelers and improving their recognition capabilities, thereby significantly improving nighttime travel safety. The embodiments also have two second characteristic wavelengths of 555nm and 590nm, with an optical power that accounts for greater than 10% of the total optical power. This effectively enhances photopic vision efficiency, improves rain, fog, and haze penetration, and enhances road reflectivity, allowing night travelers, especially those traveling in inclement weather, to see farther and more clearly, thereby improving outdoor safety. In the first embodiment of Table 5, the color temperature CCT = 4878K, the color rendering index Ra = 90, the scotopic luminous efficiency = 275.8 lm / W, and the color coordinates (x, y) are (0.3511, 0.3773). In the second embodiment of Table 5, the color temperature CCT = 4862K, the color rendering index Ra = 90, the scotopic luminous efficiency = 276.5 lm / W, and the color coordinates (x, y) are (0.3517, 0.3779).

[0080] Table 5 Parameters of four specific embodiments provided by the present invention

[0081] wavelength 460nm 500nm 555nm 590nm Optical power ratio 12.6％ 20.1％ 17.4％ 48.8％ Optical power ratio 12.6％ 19.9％ 17.5％ 48.9％

[0082] Table 6 shows the parameters of a specific lighting source provided by an embodiment of the present invention. Figure 8As shown in the spectrum diagram corresponding to Table 6, the lighting source emits golden light with a first characteristic wavelength of 490nm, and the proportion of optical power to the total optical power is greater than 10%, which can effectively improve the dark vision light effect, so that night travelers have high alertness and improve the recognition ability of night travelers, thereby greatly improving the safety of night travel; it has two second characteristic wavelengths of 550nm and 590nm, and the proportion of optical power to the total optical power is greater than 10%, which can effectively improve the light effect of bright vision, improve the penetration of rain, fog, and haze and the reflectivity of the road surface, so that night travelers, especially those traveling in bad weather at night, can have a farther sight and clearer vision, thereby improving outdoor safety; it also has a third characteristic wavelength of 620nm, and the corresponding optical power accounts for more than 50% of the total optical power, with better rain, fog, and haze penetration and road reflectivity, so that night travelers, especially those traveling in bad weather at night, can have a farther sight and clearer vision, thereby improving outdoor safety. The lighting source provided in this embodiment has a color temperature CCT of 2842K, a color rendering index Ra of 94, a dark visual luminous efficiency of 263 lm / W, and color coordinates (x, y) of (0.4591, 0.4278).

[0083] Table 6 Parameters of another specific embodiment provided by the embodiment of the present invention

[0084] wavelength 460nm 490nm 550nm 590nm 620nm Optical power ratio 3.7％ 10.5％ 15.2％ 11.5％ 57.8％

[0085] Figure 9 A schematic diagram of the structure of a light emitting diode chip provided by an embodiment of the present invention, referring to Figure 9 Optionally, the light-emitting diode chip 100 includes an N-type semiconductor layer 101, a P-type semiconductor layer 104, and a first light-emitting layer 103 and a second light-emitting layer 102 arranged between the N-type semiconductor layer 101 and the P-type semiconductor layer 104, the first light-emitting layer 103 is located on the side of the second light-emitting layer 102 close to the P-type semiconductor layer 104; the first light-emitting layer 103 generates light of at least one wavelength band in an electroluminescent manner, and includes at least one first light-emitting layer layer. The light generated by the first light-emitting layer 103 excites the second light-emitting layer 102 to generate light of at least one wavelength band, and the second light-emitting layer 102 also includes at least one second light-emitting layer layer.

[0086] The LED chip 100 generates both electroluminescence (EL) and photoluminescence (PL), resulting in a stable spectral energy distribution of the illumination source as the current changes. The photoluminescent second light-emitting layer 102 is located between the N-type semiconductor layer 101 and the P-type semiconductor layer 104. The second light-emitting layer 102 can release stress in advance, thereby improving the external quantum efficiency of the first light-emitting layer 103. Furthermore, the second light-emitting layer 102 itself has high crystal quality and can convert light through multiple reflections and absorption between the N-type semiconductor layer 101 and the P-type semiconductor layer 104. This improves the external quantum efficiency of the second light-emitting layer 102, resulting in wavelengths generated by the first and second light-emitting layers 103 and 104 having a higher external quantum efficiency (EQE) than conventional LEDs.

[0087] The illumination light source may include one or more LED chips 100, each of which is a multi-wavelength chip, i.e., having at least two wavelengths. The shape of the LED chip 100 may be rectangular, square, circular, elliptical, triangular, rhombus, parallelogram, or other polygonal shape. Each LED chip 100 includes an N-type semiconductor layer 101, a P-type semiconductor layer 104, a first light-emitting layer 103, and a second light-emitting layer 102. The first light-emitting layer 103 and the second light-emitting layer 102 are stacked, with the first light-emitting layer 103 located on the side of the second light-emitting layer 102 closer to the P-type semiconductor layer 104, i.e., the first light-emitting layer 103 is closer to the P-type semiconductor layer 104, and the second light-emitting layer 102 is closer to the N-type semiconductor layer 101. Holes output by the P-type semiconductor layer 104 and electrons output by the N-type semiconductor layer 101 recombine within the first light-emitting layer 103, causing the first light-emitting layer 103 to generate light of at least one wavelength band in an EL manner. A hole isolation region is defined between first light-emitting layer 103 and second light-emitting layer 102, preventing holes emitted by P-type semiconductor layer 104 from reaching second light-emitting layer 102 and preventing electroluminescence (EL) from occurring in second light-emitting layer 102. Exemplarily, the total thickness of the electroluminescent layer is greater than or equal to the hole diffusion length, forming the hole isolation region. Alternatively, a hole isolation layer is defined between the electroluminescent layer and the photoluminescent layer, with the combined thickness of the hole isolation layer and electroluminescent layer greater than or equal to the hole diffusion length. Light in the first wavelength band generated by first light-emitting layer 103 is transmitted to second light-emitting layer 102, exciting it and causing it to generate light in at least one wavelength band in a PL manner.

[0088] It is understood that when the first light-emitting layer 103 generates light of a single wavelength, the first light-emitting layer 103 only utilizes electroluminescence as a luminescence mechanism. When the first light-emitting layer 103 generates light of at least two wavelengths, the smallest wavelength excites the material with the larger wavelength to cause photoluminescence, resulting in both electroluminescence and photoluminescence as luminescence mechanisms in the first light-emitting layer 103. Holes within the P-type semiconductor layer 104 are difficult to transfer to the second light-emitting layer 102, so the second light-emitting layer 102 only utilizes photoluminescence as a luminescence mechanism.

[0089] In this way, the LED chip 100 exhibits both electroluminescence and photoluminescence, ensuring stable spectral energy distribution of the illumination source as current changes. The photoluminescent second light-emitting layer 102 is located between the N-type semiconductor layer 101 and the P-type semiconductor layer 104. This allows for early stress release in the second light-emitting layer 102, thereby improving the external quantum efficiency of the first light-emitting layer 103. Furthermore, the second light-emitting layer 102 exhibits high crystal quality and multiple reflections and absorptions between the N-type semiconductor layer 101 and the P-type semiconductor layer 104, further improving its external quantum efficiency. This results in wavelengths generated by both the first and second light-emitting layers 103 and 102 having higher external quantum efficiencies than conventional LEDs.

[0090] Each wavelength band can include multiple wavelengths, with the number of wavelengths included being greater than or equal to 1 and less than or equal to 10. The number of wavelengths in different wavelength bands can be equal or different, and the wavelengths generated by the first light-emitting layer 103 and the second light-emitting layer 102 can be the same or different. For example, a wavelength can be set every 15 nm between 450 nm and 490 nm. By obtaining multiple wavelengths from a single light-emitting diode chip, the characteristic wavelength and half-maximum width can be precisely adjusted, and the light intensity ratio of the different wavelengths can also be precisely adjusted.

[0091] In this way, the number of wavelengths, specific wavelengths, characteristic wavelengths and half-maximum widths of different wavelengths, and the ratio of light intensities of different wavelengths can be selected as needed for the LED chip 100, achieving a variety of lighting methods. This allows the spectral design of each lighting source to break through the limitations of traditional LED chips, fully considering the characteristics of high light and dark visual efficiency, high road reflectivity, high penetration of rain, fog, and haze, and high alertness, comprehensively considering outdoor lighting safety and ensuring the safety of nighttime travel. Furthermore, the use of this multi-wavelength LED chip that combines electroluminescence and photoluminescence offers a simple driving method, packaging process, and control method, facilitating cost control while easily obtaining a full-spectrum lighting spectrum. Furthermore, the size of the multi-wavelength chip and LED chipset can be flexibly adjusted, reducing costs and improving reliability and service life.

[0092] Optionally, the wavelength band corresponding to the light generated by the first light-emitting layer 103 includes at least one of the purple band, blue band, cyan band, and green band; the wavelength band corresponding to the light generated by the second light-emitting layer 102 includes at least one of the purple band, blue band, cyan band, green band, yellow band, red band and infrared band; at least one wavelength of the light generated by the first light-emitting layer 103 is smaller than all wavelengths of the light generated by the second light-emitting layer 102.

[0093] In some possible implementations, the wavelength corresponding to the light generated by the first light-emitting layer 103 is the violet wavelength and / or the blue wavelength, that is, the electroluminescent first light-emitting layer 103 generates violet light and / or blue light. Furthermore, the wavelength corresponding to the light generated by the first light-emitting layer 103 can also be the cyan wavelength or the green wavelength, that is, the electroluminescent first light-emitting layer 103 can generate cyan light and / or green light in addition to generating violet light and / or blue light.

[0094] Among them, the wavelength range of the violet band is 400nm~420nm, the wavelength range of the blue band is 420nm~480nm, the wavelength range of the cyan band is 480nm~510nm, the wavelength range of the green band is 510nm~565nm, the wavelength range of the yellow band is 565nm~590nm, the wavelength range of the red band is 590nm~740nm, and the wavelength range of the infrared band is 740nm~1.7μm.

[0095] It can be understood that the light in the violet band is violet light, and its color is purple; the light in the blue band is blue light, and its color is blue; the light in the cyan band is cyan light, and its color is cyan; the light in the green band is green light, and its color is green; the light in the yellow band is yellow light, and its color is yellow; the light in the red band is red light, and its color is red; the light in the infrared band is infrared light, and its color is colorless.

[0096] Thus, LED chip 100 can contain a total of n colors, where 1≤n≤7. The electroluminescence mechanism includes a color, and the photoluminescence mechanism includes b colors, where 1≤a≤4 and 2≤b≤7. Colors correspond to wavelengths. For example, blue corresponds to the blue wavelength band, which has a wavelength range of 420nm to 480nm. For ease of description and representation, in the following examples, the violet wavelength band is represented by A, the blue wavelength band by B, the cyan wavelength band by C, the green wavelength band by G, the yellow wavelength band by Y, the red wavelength band by R, and the infrared wavelength band by IR.

[0097] In some possible implementations, optionally, Figure 10 A schematic diagram of the structure of an illumination light source provided by an embodiment of the present invention is shown in FIG. Figure 10As shown, the lighting source includes a light emitting diode chip, and the light generated by the packaged light emitting diode chip forms the outgoing light of the lighting source.

[0098] It is understood that when the illumination light source includes a single LED chip, the LED chip can be a single single-core multi-wavelength chip. The wavelength bands corresponding to the light generated by the first light-emitting layer 103 and the second light-emitting layer 102 of the LED chip 100 include at least the blue band B, the cyan band C, the green band G, the yellow band Y, and the red band R. The wavelength range of the wavelength band corresponding to the light generated by the first light-emitting layer 103 is relatively small, which facilitates the excitation of the second light-emitting layer 102 to emit light. For example, the wavelength band corresponding to the light generated by the illumination light source formed by the single single-core multi-wavelength chip can be Bx+Cy+Gz+Ym+Rn, or can be Ax+By+Cz+Gm+Yn+Rk, Bx+Cy+Gz+Ym+Rn+IRk, Ax+By+Cz+Gm+Yn+Rk+IRt, etc., where x, y, z, m, n, k, and t are the number of wavelengths in the corresponding wavelength band, and their values ​​are greater than or equal to 1.

[0099] In some possible implementations, optionally, the lighting source includes at least two light-emitting diode chips, and light generated by the at least two light-emitting diode chips is mixed to form the output light of the lighting source.

[0100] The light emitting diode chip may be a single-core multi-wavelength chip. For example, Figure 11 A schematic diagram of a lighting source according to an embodiment of the present invention is provided. Figure 11 The lighting source may include two LED chips. The wavelength band corresponding to the light generated by the first LED chip 100a may be Bx+Gy+Yz, and the wavelength band corresponding to the light generated by the second LED chip 100b may be Cx+Ry. Figure 12 A schematic diagram of another lighting source provided by an embodiment of the present invention, referring to Figure 12 The lighting source may further include three LED chips. The wavelength band corresponding to the light generated by the first LED chip 100a may be Ax+By+Cz, the wavelength band corresponding to the light generated by the second LED chip 100b may be Cx+Gy, and the wavelength band corresponding to the light generated by the third LED chip 100c may be Yx+Ry. Figure 13 A schematic diagram of another lighting source provided by an embodiment of the present invention, referring to Figure 13The wavelength band corresponding to the light generated by the first LED chip 100a may be Ax+By+Cz, the wavelength band corresponding to the light generated by the second LED chip 100b may be Bx+Gy+Yz, and the wavelength band corresponding to the light generated by the third LED chip 100c may be Bx+Ry+IRz, etc. In other embodiments, the number of LED chips and the wavelength bands of the light generated may be flexibly designed according to actual needs, and the embodiments of the present invention are not limited thereto.

[0101] In some possible implementations, the illumination light source optionally further includes at least one single-wavelength chip that generates light of a single wavelength. A single-wavelength chip generates light of a single wavelength. For example, the single-wavelength chip may be of A, C, IR, R, G, B, or Y wavelength. Optionally, the light generated by the at least one LED chip is mixed with the light generated by the at least one single-wavelength chip to form the output light of the illumination light source.

[0102] Exemplarily, the illumination light source may include a single / multiple single-wavelength chips and a single / multiple multi-wavelength chips. Specifically, Figures 14 to 16 are schematic structural diagrams of another lighting source provided by an embodiment of the present invention, with reference to Figure 14 The illumination light source includes a single-wavelength chip 100s and two multi-wavelength chips 100m. The wavelength band corresponding to the light generated by the single-wavelength chip 100s is R, the wavelength band corresponding to the light generated by the first multi-wavelength chip 100m1 is Ax+By+Cz, and the wavelength band corresponding to the light generated by the second multi-wavelength chip 100m2 can be Cx+Gy+Yz; or refer to Figure 15 The illumination light source includes a single wavelength chip 100s and two multi-wavelength chips 100m. The wavelength band corresponding to the light generated by the single wavelength chip 100s is R, the wavelength band corresponding to the light generated by the first multi-wavelength chip 100m1 is Ax+By+Cz, and the wavelength band corresponding to the light generated by the second multi-wavelength chip 100m2 may be Bx+Gy+Yz. Figure 16 The illumination light source may further include two single-wavelength chips 100s and one multi-wavelength chip 100m. The light generated by the first single-wavelength chip 100s1 corresponds to the wavelength Y, the light generated by the second single-wavelength chip 100s2 corresponds to the wavelength R, and the light generated by the multi-wavelength chip 100m may correspond to the wavelength Bx+Cy+Gz. In other embodiments, the number of single-wavelength and multi-wavelength chips and the wavelengths of the light generated can be flexibly designed according to actual needs, and this embodiment of the present invention is not limited thereto.

[0103] Figure 17 A schematic diagram of another lighting source provided by an embodiment of the present invention, referring to Figure 18Optionally, the LED chip 100 further includes a color conversion layer 105 , which is disposed on the light-emitting side of the LED chip 100 .

[0104] The color conversion layer 105 converts the color of light generated by the LED chip 100, for example, into red, yellow, or green light. The color conversion layer 105 includes at least one color conversion material, each of which converts light to different wavelengths. The color conversion material can be incorporated into the encapsulant and applied to the light-emitting surface of the LED chip 100 during packaging. Alternatively, the color conversion material can be formed into a film and attached to the light-emitting surface of the LED chip 100.

[0105] Optionally, the color conversion layer includes at least one color conversion material, and the wavelengths of light converted by each color conversion material vary. The color conversion material forming the color conversion layer 105 can be a quantum dot material or a fluorescent material. The wavelengths corresponding to the light converted by the color conversion material include blue, green, cyan, yellow, red, or infrared. For example, the color conversion material includes potassium fluorosilicate (KSF) phosphor (i.e., red phosphor), aluminate red phosphor, aluminate green phosphor, europium-doped blue phosphor, yellow phosphor, etc.

[0106] In some possible implementations, optionally, light generated by at least one light-emitting diode chip is mixed with light generated by the color conversion layer to form output light of the illumination light source.

[0107] The principle of adding color conversion materials is to supplement missing colors, or to increase spectral continuity and brightness by adding color conversion materials to the LED chip containing the color. It should also be noted that when adding color conversion materials, the same color can be a single color conversion material, or multiple color conversion materials with different wavelengths can be added. For example, adding G color conversion materials can be done by adding a single G color conversion material or by adding multiple G color conversion materials with different wavelengths. When the LED chip contains G or a wavelength of another color, the added G or other color conversion material can have the same wavelength as the LED chip to increase brightness, or a different wavelength to increase spectral continuity and brightness.

[0108] During specific implementation, the light-emitting diode chip and the color conversion material can be combined according to actual needs. A single multi-wavelength chip + a single type / color conversion material can be selected. For example, the multi-wavelength chip corresponds to the wavelength band of Ax+By+Cz, and the color conversion material can be Y+G+R or G+Y+R+IR. Alternatively, multiple multi-wavelength chips + a single type or multiple types of color conversion materials can be selected. For example, the wavelength bands corresponding to two multi-wavelength chips are Ax+By+Cz+Gm and Ax+By+Cz+Gm+Yn, respectively, and the color conversion material can be Y+R or Y+R+IR, or G+Y+R, or G+Y+R+IR, or G+Y+R, or G+Y+R+IR. Alternatively, a single or multiple multi-wavelength chips + a single or multiple single-core single-wavelength chips + a single type or multiple types of color conversion materials can be selected. The selection can be made according to actual conditions during specific implementation. The lighting source provided by the embodiments of the present invention has the following advantages: a simple driving circuit and a simple control method; simple phosphor preparation and packaging; a continuous spectrum of the obtained lighting source and a higher R1-R15 color rendering index; and low cost: the cost of a single-core multi-wavelength chip is lower than the total cost of multiple chips, and lower than the total cost of a traditional single-core single-wavelength chip + multiple powders.

[0109] The color conversion material is arranged on the light-emitting side of the chip, and can cover all chips or part of the chips. Figures 18 to 22 are schematic structural diagrams of another lighting source provided by an embodiment of the present invention, with reference to Figure 18 The lighting source includes a first multi-wavelength chip 100m1 and a second multi-wavelength chip 100m2, and a color conversion layer 105a arranged on the light-emitting side of the first multi-wavelength chip 100m1 and a color conversion layer 105b arranged on the light-emitting side of the second multi-wavelength chip 100m2; Figure 19 The illumination light source includes a multi-wavelength chip 100m and a single-wavelength chip 100s and a color conversion layer 105 arranged on the light-emitting side of the multi-wavelength chip 100m; Figure 20 The illumination light source includes a multi-wavelength chip 100m and a single-wavelength chip 100s and a color conversion layer 105 arranged on the light-emitting side of the single-wavelength chip 100s; Figure 21 The illumination light source includes a multi-wavelength chip 100m and a single-wavelength chip 100s, and a color conversion layer 105a provided on the light-emitting side of the multi-wavelength chip 100m and a color conversion layer 105b provided on the light-emitting side of the single-wavelength chip 100s; Figure 22 The illumination light source includes a first multi-wavelength chip 100m1 and a second multi-wavelength chip 100m2, and a color conversion layer 105 disposed on the light-emitting side of the first multi-wavelength chip 100m1 and the light-emitting side of the second multi-wavelength chip 100m2. It is understood that in other embodiments, the number of multi-wavelength chips and single-wavelength chips may be greater than one, and the specific implementation can be designed based on actual conditions.

[0110] In some possible implementations, the lighting source optionally further includes at least one single-wavelength chip and a color conversion layer. The single-wavelength chip generates light of a single wavelength, and the color conversion layer is disposed on the light-emitting diode chip and / or the single-wavelength chip's light-emitting side. The single-wavelength chip generates light of a single wavelength, and the color conversion layer can convert and generate light of at least one wavelength. The color conversion layer can be disposed on the light-emitting side of the single-wavelength chip, on the light-emitting diode chip, or on both the single-wavelength chip and the light-emitting diode chip. The single-wavelength chip and the color conversion layer can refer to the above embodiments and will not be described in detail here.

[0111] Optionally, the light generated by at least one light-emitting diode chip, the light generated by at least one single-wavelength chip, and the light generated by the color conversion layer are mixed to form the output light of the illumination light source.

[0112] An embodiment of the present invention further provides a lighting device, comprising any one of the lighting light sources provided in the above embodiments.

[0113] The lighting device improved by the embodiment of the present invention includes any one of the lighting light sources provided by the above embodiments, and has the same or corresponding technical effects as the lighting light source, which will not be described in detail here.

[0114] Optionally, the lighting device also includes an insect repellent light source that emits light in the 560nm to 600nm wavelength range. In specific implementations, different wavelengths can be selected based on the specific insects, such as 570±5nm or 585±5nm. The lighting light source can be packaged into lighting beads, and the insect repellent light source can be packaged into mosquito repellent beads.

[0115] The lighting and insect repellent lamps can be configured in either a separate or integrated configuration, with the lighting and insect repellent light sources electrically connected to the same or different lighting fixtures. In a separate configuration, the yellow insect repellent and outdoor lighting lamps are placed in different lighting fixtures, creating a combined system. In an integrated configuration, the yellow insect repellent and outdoor lighting lamps are placed in different light panels within the same fixture, with no restrictions on the placement of the different panels. For example, the lighting lamps could be placed in the lower light panel of a streetlight, while the mosquito repellent lamps could be placed in the upper light panel. Another example could be the lighting lamps placed in the lower light panel of a streetlight, while the mosquito repellent lamps could be placed on the lamp itself. In both configurations, the lighting and mosquito repellent lamps can be activated simultaneously or individually, as needed. For example, only the mosquito repellent lamps could be activated to repel mosquitoes. By adding a mosquito repellent function, insects can be prevented from disturbing nighttime patrons and prevented from entering the lamp, making cleaning and maintenance easier.

[0116] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A lighting source, characterized in that: The device comprises at least one light-emitting diode chip, wherein the light-emitting diode chip emits light of at least two wavelength bands; The outgoing light of the illumination light source contains at least multiple wavelengths in the 420nm to 740nm band and has spectral continuity, the interval between two adjacent wavelengths is 5nm to 60nm, and the half-peak width of each wavelength ranges from 10nm to 60nm; The outgoing light of the illumination light source further includes a characteristic wavelength, wherein the characteristic wavelength is a wavelength at which the proportion of light power to total light power is greater than or equal to 10%; the characteristic wavelength includes at least a first characteristic wavelength and a second characteristic wavelength, wherein the first characteristic wavelength includes at least one wavelength in the 470nm to 520nm band, and the second characteristic wavelength includes at least one wavelength in the 540nm to 600nm band.

2. The lighting source according to claim 1, wherein The proportion of the optical power corresponding to the first characteristic wavelength to the total optical power is ≥10%, and the proportion of the optical power corresponding to the second characteristic wavelength to the total optical power is ≥20%.

3. The lighting source according to claim 1, wherein The characteristic wavelength further includes a third characteristic wavelength, and the third characteristic wavelength includes at least one wavelength in the 600nm to 660nm band.

4. The lighting source according to claim 3, wherein: The proportion of the optical power corresponding to the third characteristic wavelength to the total optical power is ≥20%.

5. The lighting source according to claim 1 or 4, characterized in that: The first characteristic wavelength includes a first sub-characteristic wavelength and a second sub-characteristic wavelength, the first sub-characteristic wavelength is located in the 485nm-495nm band, and the second sub-characteristic wavelength is located in the 500nm-510nm band; The second characteristic wavelength includes a third sub-characteristic wavelength and a fourth sub-characteristic wavelength, the third sub-characteristic wavelength is located in the 540nm to 570nm band, and the fourth sub-characteristic wavelength is located in the 570nm to 600nm band; The proportion of the optical power corresponding to the first sub-characteristic wavelength, the second sub-characteristic wavelength, the third sub-characteristic wavelength and the fourth sub-characteristic wavelength to the total optical power is ≥10%.

6. The lighting source according to claim 2, wherein: The first characteristic wavelength is located in the 485nm-505nm band, and the second characteristic wavelength is located in the 565nm-590nm band.

7. The lighting source according to claim 3, wherein: The optical power corresponding to the first characteristic wavelength accounts for ≥10% of the total optical power, the optical power corresponding to the second characteristic wavelength accounts for ≥30% of the total optical power, and the optical power corresponding to the third characteristic wavelength accounts for ≥30% of the total optical power.

8. The lighting source according to claim 1, wherein The emitted light of the illumination light source further includes light in the 400nm to 420nm band and / or light in the 740nm to 1.7μm band.

9. The lighting source according to claim 1, wherein: The light-emitting diode chip includes an N-type semiconductor layer, a P-type semiconductor layer, and a first light-emitting layer and a second light-emitting layer disposed between the N-type semiconductor layer and the P-type semiconductor layer, wherein the first light-emitting layer is located on a side of the second light-emitting layer close to the P-type semiconductor layer; The first light-emitting layer generates light of at least one wavelength band in an electroluminescent manner, and the light generated by the first light-emitting layer excites the second light-emitting layer to generate light of at least one wavelength band.

10. The lighting source according to claim 9, wherein: The wavelength band corresponding to the light generated by the first light-emitting layer includes at least one of a purple wavelength band, a blue wavelength band, a cyan wavelength band, and a green wavelength band; The wavelength band corresponding to the light generated by the second light-emitting layer includes at least one of the purple wavelength band, the blue wavelength band, the cyan wavelength band, the green wavelength band, the yellow wavelength band, the red wavelength band and the infrared wavelength band; At least one wavelength of light generated by the first light-emitting layer is smaller than all wavelengths of light generated by the second light-emitting layer.

11. The lighting source according to claim 9, wherein The lighting source includes a light emitting diode chip, and the light generated by the packaged light emitting diode chip forms the outgoing light of the lighting source.

12. The lighting source according to claim 9, wherein The lighting source includes at least two light-emitting diode chips, and the light generated by the at least two light-emitting diode chips after packaging is mixed to form the output light of the lighting source.

13. The lighting source according to claim 1, wherein The system also includes at least one single-wavelength chip, which generates light of a single wavelength.

14. The lighting source according to claim 13, wherein: The light generated by packaging at least one of the light-emitting diode chips and at least one of the single-wavelength chips is mixed to form the output light of the illumination light source.

15. The lighting source according to claim 1, wherein It also includes a color conversion layer, which is arranged on the light-emitting side of at least part of the light-emitting diode chip.

16. The lighting source according to claim 15, characterized in that The light generated by at least one of the light-emitting diode chips and the color conversion layer after packaging is mixed to form the output light of the illumination light source.

17. The lighting source according to claim 15, wherein: The color conversion layer includes at least one color conversion material, and the wavelengths of light converted by each color conversion material are different.

18. The lighting source according to claim 17, wherein: The color conversion material includes a quantum dot material or a fluorescent material, and the light converted by the color conversion material is in a blue band, a green band, a cyan band, a yellow band, a red band or an infrared band.

19. The lighting source according to claim 1, wherein The illumination light source further includes at least one single-wavelength chip and a color conversion layer. The single-wavelength chip generates light of a single wavelength. The color conversion layer is arranged on the light-emitting diode chip and / or the light-emitting side of the single-wavelength chip.

20. The lighting source according to claim 19, wherein Light generated by at least one of the light-emitting diode chips, at least one of the single-wavelength chips, and the color conversion layer after packaging is mixed to form the output light of the illumination light source.

21. A lighting device, characterized in that: The lighting source comprises any one of claims 1 to 20.

22. The lighting device according to claim 21, characterized in that It also includes an insect repellent light source, which emits light in the 560nm to 600nm wavelength range.

23. The lighting device according to claim 22, wherein the insect repellent light source and the lighting light source are electrically connected to the same lighting lamp body or electrically connected to different lighting lamp bodies.

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