LED lighting apparatus

Abstract

One embodiment of the present invention provides an LED lighting device comprising: an LED light source configured to emit white light having a first M / P ratio (Melanopic / photopic ratio); a tuning LED light source configured to emit tuning blue light having a peak wavelength in the range of 465 nm to 495 nm; and a driving control unit that controls the current applied to the LED light source and the tuning LED light source, respectively, to form tuned white light having a second M / P ratio higher than the first M / P ratio.

Description

Technology Field

[0001] The present invention relates to an LED lighting device. Background Technology

[0003] White light-emitting devices are implemented by applying multiple wavelength-converting materials, such as phosphors (e.g., green and red or blue, yellow, and red), to ultraviolet or blue LED chips. Recently, in the field of white lighting, there is a demand for human-centric LED lighting devices and white light-emitting devices that can be used therein. The problem to be solved

[0005] One of the problems that the present invention aims to solve is to provide an LED lighting device for human-centered lighting. means of solving the problem

[0007] As a means of solving the aforementioned problem, one embodiment of the present invention comprises: a first light-emitting diode emitting a first blue light having a peak wavelength in the range of 435 nm to 465 nm; a second light-emitting diode emitting a second blue light having a peak wavelength in the range of 465 nm to 495 nm; a first wavelength conversion material excited by the first and second blue lights to emit a first light having a peak wavelength of 520 nm to 560 nm; and a second wavelength conversion material emitting a second light having a peak wavelength of 600 nm to 645 nm, and a first LED light source configured to emit a first white light; An LED lighting device is provided comprising: a third light-emitting diode emitting a third blue light having a peak wavelength in the range of 435 nm to 465 nm; a third wavelength conversion material excited by the third blue light and emitting a third light having a peak wavelength in the range of 540 nm to 560 nm and a half-width of 60 nm or less; and a fourth wavelength conversion material excited by the third blue light and emitting a fourth light having a peak wavelength in the range of 620 nm to 650 nm, configured to emit a second white light; a tuning LED light source configured to emit a tuning blue light having a peak wavelength in the range of 465 nm to 495 nm; and a driving control unit that controls the current applied to the first LED light source, the second LED light source, and the tuning LED light source, respectively, to form a tuned white light.

[0009] Additionally, a first LED light source configured to emit a first white light, comprising: a first light-emitting diode emitting a first blue light having a peak wavelength in the range of 435 nm to 465 nm; a second light-emitting diode emitting a second blue light having a peak wavelength in the range of 465 nm to 495 nm; a first wavelength conversion material excited by the first and second blue lights to emit a first light having a peak wavelength of 520 nm to 560 nm; and a second wavelength conversion material emitting a second light having a peak wavelength of 600 nm to 645 nm; A second LED light source configured to emit a second white light, comprising: a third light-emitting diode emitting a third blue light having a peak wavelength in the range of 435 nm to 465 nm; a third wavelength conversion material excited by the third blue light and emitting a third light having a peak wavelength in the range of 540 nm to 560 nm and a full width at half maximum of 60 nm or less; and a fourth wavelength conversion material excited by the third blue light and emitting a fourth light having a peak wavelength in the range of 620 nm to 650 nm. The LED lighting device comprises a driving control unit that controls the current applied to the first LED light source and the second LED light source, respectively, to form tuned white light, wherein in the spectrum of the tuned white light, the ratio (SB / B) of the peak intensity (SB) in the 465 nm to 495 nm band to the peak intensity (B) in the 435 nm to 465 nm band is in the range of 0.2 to 2.5, and the ratio (P / B) of the maximum peak intensity (P) in the 530 nm to 680 nm band to the peak intensity (B) in the 435 nm to 465 nm band is in the range of 0.5 to 9.

[0011] Additionally, the present invention provides an LED lighting device comprising: an LED light source configured to emit white light having a first M / P ratio (Melanopic / photopic ratio); a tuning LED light source configured to emit tuning blue light having a peak wavelength in the range of 465 nm to 495 nm; and a driving control unit that controls the current applied to the LED light source and the tuning LED light source, respectively, to form tuned white light having a second M / P ratio higher than the first M / P ratio. Effects of the invention

[0013] According to embodiments of the present invention, a human-centered LED lighting device can be provided that regulates the secretion of melatonin hormone involved in human circadian rhythms by regulating the spectrum in the 465 nm to 495 nm range. Brief explanation of the drawing

[0015] FIG. 1 is a block diagram of an LED lighting device according to one embodiment of the present invention. FIGS. 2a and 2b are cross-sectional views showing a light-emitting device that can be employed in an LED light source in the embodiment of FIG. 1, and FIG. 2c is a graph showing the emission spectrum of a wavelength-converting material that can be employed in the light-emitting device of FIG. 2b. FIGS. 3a and 3b are cross-sectional views showing a light-emitting device that can be employed in a tuning LED light source in the embodiment of FIG. 1. FIGS. 4a and 4b are cross-sectional views showing a light-emitting diode chip that can be employed in the light-emitting device of FIGS. 2a to 3b. FIG. 5 is a light emission spectrum of white light (D) and tuning blue light (M) emitted respectively from an LED light source and a tuning LED light source of an LED lighting device according to one embodiment of the present invention. FIG. 6 is the emission spectrum of tuned white lights emitted from an LED lighting device according to the embodiment of FIG. 5. FIG. 7 is a light emission spectrum of white light (N) and tuning blue light (M) emitted respectively from an LED light source and a tuning LED light source of an LED lighting device according to one embodiment of the present invention. FIG. 8 is the emission spectrum of tuned white lights emitted from an LED lighting device according to the embodiment of FIG. 7. FIG. 9 is a block diagram of an LED lighting device according to one embodiment of the present invention. FIG. 10a is the emission spectrum of the first white light (D) and the second white light (N) emitted respectively from the first LED light source and the second LED light source of the LED lighting device according to the embodiment of FIG. 9. FIG. 10b is a graph for explaining the selective control of the first LED light source and the second LED light source of an LED lighting device according to the embodiment of FIG. 9. FIG. 11 is the emission spectrum of tuned white lights emitted from an LED lighting device according to the embodiment of FIG. 9. FIG. 12 is the emission spectrum of the second white lights of the light-emitting device that can be employed as the second LED light source in the embodiment of FIG. 9. FIG. 13 is a block diagram of an LED lighting device according to one embodiment of the present invention. FIG. 14 is the emission spectrum of the first white light (D), the second white light (N), and the tuning blue light (M) emitted respectively from the first LED light source, the second LED light source, and the tuning LED light source of the LED lighting device according to the embodiment of FIG. 13. FIG. 15 is the emission spectrum of tuned white lights emitted from an LED lighting device according to the embodiment of FIG. 13. Specific details for implementing the invention

[0016] Hereinafter, preferred embodiments of the present invention will be described as follows with reference to the attached drawings.

[0018] FIG. 1 is a block diagram of an LED lighting device according to one embodiment of the present invention.

[0020] Referring to FIG. 1, an LED lighting device according to one embodiment may include a light source unit (10), a driving control unit (20), and a power supply unit (30). The light source unit (10) or the light source unit (10) and the driving control unit (20) may be configured as a single module.

[0021] The light source unit (10) may include an LED light source (10A) and a tuning LED light source (10B). The LED light source (10A) and the tuning LED light source (10B) may each be operated independently by an applied current (I1, I2). The LED light source (10A) may emit white light having various Correlated Color Temperatures (CCT). For example, the LED light source (10A) may emit white light having a color temperature in the range of 1800K to 6500K. In another embodiment, the LED light source (10A) may be provided with two or more LED light sources emitting white light having different color temperatures. The tuning LED light source (10B) may adjust the intensity in the melanophonic sensitive band ("MS") of the white light emitted from the LED light source (10A) (e.g., FIG. 5). Accordingly, the light source unit (10) can emit white light with a controlled intensity of a melanophytic sensitive band that affects human circadian rhythms.

[0022] The drive control unit (20) may include a drive signal control unit (21) and a light source drive unit (25). The drive signal control unit (21) may transmit a drive signal of the light source unit (10) to the light source drive unit (25). The drive signal control unit (21) may control the current (I1, I2) supplied from the light source drive unit (25) to the light source unit (10). The light source drive unit (25) may include a first drive unit (25A) and a second drive unit (25B) that drive the LED light source (10A) and the tuning LED light source (10B), respectively. The first drive unit (25A) and the second drive unit (25B) may supply the current (I1, I2) controlled by the drive signal of the drive signal control unit (21) to the LED light source and the tuning LED light source (10A, 10B). The light source driving unit (25) can receive AC or DC power from the power supply unit (30).

[0023] In one example, the drive control unit (20) may further include a communication module that transmits and receives data of color characteristics, such as a measured color temperature, to or from the inside or outside of the LED lighting device. The drive control unit (20) may further include a signal processing unit that processes sensor data from at least one of an illuminance sensor, a motion sensor, and an image sensor and transmits and receives it to or from the inside or outside of the drive control unit (20).

[0024] In one embodiment, the LED lighting device may include an LED light source configured to emit white light having a first M / P ratio (Melanopic / photopic ratio), a tuning LED light source configured to emit tuning blue light having a peak wavelength in the range of 465 nm to 495 nm, and a driving control unit that controls the current applied to the LED light source and the tuning LED light source, respectively, to form tuned white light having a second M / P ratio higher than the first M / P ratio. Depending on the configuration of the LED light source, the first M / P ratio may be in the range of about 0.2 to 1.2 (e.g., when including the first and second light-emitting devices of FIG. 2a and 2b) (see third embodiment), or in the range of about 0.6 to 1.2 (when including the first light-emitting device of FIG. 2a) (see first embodiment), or in the range of about 0.1 to 0.7 (when including the second light-emitting device of FIG. 2b) (see second embodiment). In addition, the second M / P ratio corresponding to each first M / P ratio may be in the range of about 0.3 to 2.6 (see 4th embodiment), or in the range of about 0.6 to 2.5 (see 1st embodiment), or in the range of 0.2 to 2.6 (see 2nd embodiment).

[0025] Hereinafter, with reference to FIG. 1 and FIG. 2a to 2c, a light-emitting device that can be employed in an LED light source (10A) will be described.

[0027] FIGS. 2a and 2b are cross-sectional views showing light-emitting devices (100Aa, 100Ab) that can be employed in an LED light source in an embodiment of FIG. 1, and FIG. 2c is a graph showing the emission spectrum of a first wavelength conversion material that can be employed in the light-emitting device of FIG. 2b. The LED light source of FIG. 1 may include at least one of the first and second light-emitting devices (100Aa, 100Ab), each emitting first and second white light having different color temperatures, M / P ratios, etc.

[0029] Referring to FIG. 2a, the LED light source (or the first LED light source) may include a first white light emitting device (100Aa) that emits a first white light with a first M / P ratio (e.g., about 0.6 to 1.2) (see first embodiment). The first white light emitting device (100Aa) may include a package substrate (110), a sidewall reflector (120), a first light emitting diode (130), a second light emitting diode (140), and a wavelength converter (150Aa).

[0030] The package substrate (110) may include first and second electrode structures (111, 112) electrically connected to first and second light-emitting diodes (130, 140). The package substrate (110) may be molded from an opaque resin or a resin with high reflectivity, and may include a polymer resin containing highly reflective powder that facilitates the injection molding process. Additionally, the package substrate (101) may be made of ceramic, in which case heat dissipation may be easy. In one example, the package substrate (110) may be a printed circuit board having a wiring pattern formed thereon that replaces the first and second electrode structures (111, 112).

[0031] The sidewall reflector (120) is disposed on the package substrate (110) and may have a cavity that accommodates the first and second light-emitting diodes (130, 140). The sidewall reflector (120) may have a cup shape to improve light reflection efficiency, but is not limited thereto. In one example, the sidewall reflector (120) may be formed integrally with the package substrate (110). For example, the sidewall reflector (120) and the package substrate (110) may be formed from the same material (e.g., a resin containing highly reflective white powder) through the same process (e.g., injection molding).

[0032] The first and second light-emitting diodes (130, 140) may be electrically connected to the first and second electrode structures (111, 112), respectively. In one embodiment, the first and second light-emitting diodes (130, 140) are electrically connected to the first and second electrode structures (111, 112), respectively, by a conductive wire (W), but are not limited thereto and may be connected in a flip-chip manner. The first light-emitting diode (130) may be configured to emit a first blue light having a peak wavelength in the range of 435 nm to 465 nm, and the second light-emitting diode (140) may be configured to emit a second blue light having a peak wavelength in the range of 465 nm to 495 nm.

[0033] The wavelength conversion unit (150Aa) may include at least one of a transparent resin (152Aa) and first and second wavelength conversion materials (154Aa, 156Aa). The transparent resin (152Aa) may be made of epoxy, silicone, modified silicone, urethane resin, oxetane resin, acrylic, polycarbonate, polyimide, and combinations thereof. The first and second wavelength conversion materials (154Aa, 156Aa) may be excited by first and second blue light generated from first and second light-emitting diodes (130, 140) and emit light having wavelengths different from these. For example, the first wavelength conversion material (154Aa) may be excited by at least one of the first and second blue light to emit a first light with a peak wavelength of 520 nm to 560 nm, and the second wavelength conversion material (156Aa) may be excited by at least one of the first and second blue light to emit a second light with a peak wavelength of 600 nm to 645 nm. The first wavelength conversion material (154Aa) is, for example, (Ga,Gd,Y)2Al5O 12:Ce, La3Si6Ni:Ce, (Sr,Ca,Ba)Si2O2N2:Eu, (Sr,Ba)Si2O4:Eu and combinations thereof may include at least one phosphor selected from these. The second wavelength conversion material (156Aa) is, for example, (Sr,Ca)AlSiN3:Eu, CaAlSiN3:Eu, K x SiF y :Mn 4+ (2≤x≤3, 4≤y≤7), α-SiAlON:Eu, SrAl2Li2O2N2, MGF:Mn 4+ It may include at least one phosphor selected from the combination thereof. At least one of the first and second wavelength conversion materials (154Aa, 156Aa) may have an excitation efficiency by the first blue light that is higher than the excitation efficiency by the second blue light. In one embodiment, the first and second wavelength conversion materials (154Aa, 156Aa) are dispersed in a transparent resin (152Aa), but is not limited thereto. In one example, the first and second wavelength conversion materials (154Aa, 156Aa) may be provided in a form surrounded by the surfaces of the first and second light-emitting diodes (130, 140).

[0034] The first white light emitting device (100Aa) can emit first white light by combining the first and second light converted by the first and second wavelength conversion materials (154Aa, 156Aa) and the remaining first and second blue light that was not converted. In one embodiment, the first white light may be configured to have an emission spectrum that satisfies specific conditions by considering BLH (blue light hazard), circadian rhythm, etc. This will be explained in detail in relation to the third embodiment described below.

[0036] Referring to FIG. 2b, the LED light source (or the second LED light source) may include a second white light emitting device (100Ab) that emits a second white light with a first M / P ratio (e.g., in the range of about 0.1 to 0.7) (see second embodiment). The second white light emitting device (100Ab) may include a package substrate (110), a sidewall reflector (120), at least one third light emitting diode (130), and a wavelength converter (150Ab). For example, the second white light emitting device (100Ab) may include one or two third light emitting diodes (130) having a peak wavelength in the range of 435 nm to 465 nm. Here, since the components other than the wavelength converter (150Ab) have the same or similar features as the components of FIG. 2a having the same reference number, redundant descriptions are omitted.

[0037] The wavelength conversion unit (150Ab) may include a transparent resin (152Ab) and third and fourth wavelength conversion materials (154Ab, 156Ab). The third and fourth wavelength conversion materials (154Ab, 156Ab) may be excited by third blue light generated from the third light-emitting diode (130) and emit light having wavelengths different from these. For example, the third wavelength conversion material (154Ab) may be excited by the third blue light to emit third light having a peak wavelength in the range of 540 nm to 560 nm and a full width at half maximum of 60 nm or less, and the fourth wavelength conversion material (156Ab) may be excited by the third blue light to emit fourth light having a peak wavelength in the range of 620 nm to 650 nm. The third blue light generated from the third light-emitting diode (130) may have a peak wavelength in the range of 435 nm to 465 nm.

[0038] The third wavelength conversion material (154Ab) may be configured to emit green light having a peak wavelength somewhat higher than that of a conventional green wavelength conversion material so as to lower the 465 nm to 495 nm region in the spectrum of the final white light. The third wavelength conversion material (154Ab) is, for example, β-Si 6-zAl z O z N 8-z :Eu 2+ z (0.01≤z≤5.99) (hereinafter also referred to as "β-SiAlON" phosphor) may be included. Referring together to FIG. 2c, the spectrum (G1) of the β-SiAlON phosphor may have a relatively narrower full width at half maximum (e.g., about 60 nm or more) than the spectrum (G2) of another green phosphor (e.g., silicate phosphor). The spectrum (G1) of the β-SiAlON phosphor may have a full width at half maximum of about 60 nm or less, for example, less than about 60 nm and more than 35 nm, or less than about 60 nm and more than 45 nm. Thus, in one embodiment, a first wavelength conversion material (154Ab) having a full width at half maximum of 60 nm or less may be used so as to sufficiently reduce the intensity in the 465 nm to 495 nm region of the white light spectrum of an LED light source. Meanwhile, the spectrum (G1) produced by the β-SiAlON phosphor has a relatively very low intensity at a wavelength of 480 nm. For example, the third wavelength conversion material (154Ab) may have an emission spectrum with an intensity of 10% or less, or 5% or less, or even 2% or less, relative to the peak intensity at a wavelength of 480 nm. In addition to the β-SiAlON phosphor, the third wavelength conversion material (154Ab) may include a ceramic phosphor and / or a quantum dot that satisfies the conditions of the peak wavelength and full width at half maximum described above. For example, the quantum dot may include InP / ZnS, InP / ZnSe, CdSe / CdS, CdSe / ZnS, PbS / ZnS, InP / ZnSe / ZnS, InP / GaP / ZnS, and combinations thereof.

[0039] The fourth wavelength conversion material (156Ab) may be selected as a material to supplement the color rendering index of the final white light. In one example, the fourth light emitted from the fourth wavelength conversion material (156Ab) may have a full width at half maximum of 60 nm or less, along with a peak wavelength in the range of 620 nm to 650 nm. The fourth wavelength conversion material (156Ab) may be a red phosphor or quantum dot that satisfies these wavelength conditions. The fourth wavelength conversion material (156Ab) may include, for example, at least one phosphor selected from (Sr,Ca)AlSiN3:Eu, CaAlSiN3:Eu, and combinations thereof.

[0040] The second white light emitting device (100Ab) can emit second white light by combining the third and fourth light converted by the third and fourth wavelength conversion materials (154Ab, 156Ab) and the remaining unconverted third blue light. In one embodiment, the second white light may be configured to have an emission spectrum that satisfies specific conditions by considering the color rendering index, circadian rhythm, etc. This will be explained in detail in relation to the third embodiment described below.

[0042] FIGS. 3a and 3b are cross-sectional views showing a light-emitting device (100Ba, 100Bb) that can be employed in a tuning LED light source (10B) in the embodiment of FIG. 1.

[0044] Referring to FIG. 3a, in one embodiment, a tuning LED light source may include a tuning light-emitting device (100Ba) that emits tuning blue light having a peak wavelength in the range of 465nm to 495nm. The tuning light-emitting device (100Ba) may include a light-emitting diode (130Ba) that emits tuning blue light having a peak wavelength in the range of 465nm to 495nm, and may be configured so that a wavelength-converting material is not included in the transparent resin (152Ba) covering the light-emitting diode (130Ba). Accordingly, the tuning LED light source may use the blue light having a peak wavelength in the range of 465nm to 495nm emitted from the light-emitting diode (130Ba) as tuning blue light without wavelength conversion. The light-emitting diode (130Ba) may include a first conductivity semiconductor layer and a second conductivity semiconductor layer arranged sequentially, and an active layer arranged between the first and second conductivity semiconductor layers. In one embodiment, the first conductivity type semiconductor layer and the second conductivity type semiconductor layer include semiconductor layers having different conductivity types, and the active layer is In x Ga 1-x N (0 <x≤1)를 포함하는 양자우물층일 수 있다. 예를 들어, 제1 도전형 반도체층 및 제2 도전형 반도체층은 각각 n형 및 p형 질화물 반도체이고, 활성층은 In x Ga 1-x It may be a quantum well layer with N (0.215≤x<0.427). Since the tuning light-emitting device (100Ba) of FIG. 3a has the same or similar features as the light-emitting device (100Aa) of FIG. 2a, except that it does not include a separate wavelength conversion material, a redundant description is omitted.

[0046] Referring to FIG. 3b, in one embodiment, a tuning LED light source may include a light-emitting diode (130Bb) that emits blue light having a peak wavelength in the range of 435 nm to 465 nm, and a wavelength conversion unit (150Bb) having a wavelength conversion material (156Bb) that is excited by the blue light and emits tuning blue light having a peak wavelength in the range of 465 nm to 495 nm. The light-emitting diode (130Bb) may be configured to emit blue light having a peak wavelength in the range of 435 nm to 465 nm by adjusting the indium content of the active layer in the light-emitting diode (130Ba) of FIG. 3a. The wavelength conversion material (156Bb) may be provided in a dispersed form in a transparent resin (152Bb). Wavelength conversion materials (156Bb) are, for example, NaK(Li3SiO4):Eu, (Sr,Ca,Ba)Si2O2N2:Eu, and (Sr,Ba) 10 It may include a phosphor selected from the group consisting of (PO4)6Cl2:Eu.

[0048] The tuning LED light source provides blue light having a peak wavelength in the range of 435 nm to 465 nm to control the intensity of the spectrum in the melanopic sensitive band, and can also provide blue light having an intensity in a certain range when combined with the first and / or second LED light sources of FIGS. 2a and 2b. For example, the tuning LED light source can provide blue light having a peak intensity in the range of 10% to 5300% relative to the peak intensity of the blue light having a peak wavelength in the range of 435 nm to 465 nm (the first and third blue lights described above). An embodiment of the present invention can provide a human-centered LED lighting device that takes into account human circadian rhythms by using an LED light source satisfying specific conditions and a tuning LED light source. For example, an LED lighting device with a diversified control range for M / P ratio, Color Rendering Index (CRI), and Color Temperature (CCT) can be provided to provide white light that takes into account not only human activity time (e.g., day and night) but also the surrounding environment (e.g., other indoor or outdoor lighting or activity purposes).

[0050] FIGS. 4a and 4b are cross-sectional views showing light-emitting diode chips (40A, 40B) that can be employed in the light-emitting devices of FIGS. 2a to 3b.

[0052] Referring to FIG. 4a, in one example, a light-emitting diode chip (40A) may include a substrate (41), a semiconductor laminate (S), and a pair of electrodes (48, 49). The substrate (41) may be an insulating substrate such as sapphire, but is not limited thereto, and may be a conductive or semiconductor substrate. For example, in addition to sapphire, the substrate (41) may be SiC, Si, MgAl2O4, MgO, LiAlO2, LiGaO2, or GaN. An irregularity (P) may be formed on the upper surface of the substrate (41). The irregularity (P) can improve the quality of the single crystal being grown while improving light extraction efficiency.

[0053] The semiconductor stack (S) may include a first conductivity semiconductor layer (44), an active layer (45), and a second conductivity semiconductor layer (46) sequentially disposed on a substrate (41). A buffer layer (42) may be additionally disposed between the substrate (41) and the first conductivity semiconductor layer (44). The buffer layer (42) is an undoped InxAlyGa1-x-yN (0 It may include x≤1, 0≤y≤1). For example, the buffer layer (42) may be GaN, AlN, AlGaN, or InGaN, and may be used by combining multiple layers or by gradually changing the composition. The first conductivity type semiconductor layer (44) is an n-type InxAlyGa1-x-yN (0 It may be a nitride semiconductor satisfying x<1, 0≤y<1, 0≤x+y<1), and the n-type impurity may be Si. For example, the first conductivity semiconductor layer (44) may include n-type GaN. The second conductivity semiconductor layer (46) is p-type InxAlyGa1-x-yN (0 It may be a nitride semiconductor layer satisfying x<1, 0≤y<1, 0≤x+y<1), and the p-type impurity may be Mg. For example, the second conductivity semiconductor layer (46) may be implemented as a single layer structure, but may have a multilayer structure having different compositions. The active layer (45) may be a multiple quantum well (MQW) structure in which a quantum well layer and a quantum barrier layer are alternately stacked. For example, the quantum well layer and the quantum barrier layer may be InxAlyGa1-x-yN (0≤x≤1, 0≤y≤1, 0≤x+y≤1) having different compositions. In one example, the quantum well layer is InxGa1-xN (0 <x≤1)이며, 양자장벽층은 GaN 또는 AlGaN일 수 있다. 양자우물층과 양자장벽층의 두께는 각각 1㎚~50㎚ 범위일 수 있다. 활성층(45)은 다중양자우물구조에 한정되지 않으며, 단일양자우물 구조일 수 있다.

[0054] The first and second electrodes (38, 39) may be respectively placed in the mesa-etched region of the first conductive semiconductor layer (44) and the second conductive semiconductor layer (46) so as to be located on the same plane. The first electrode (38) may include materials such as Ag, Ni, Al, Cr, Rh, Pd, Ir, Ru, Mg, Zn, Pt, Au, etc., but is not limited thereto, and may be employed as a single layer or a structure of two or more layers. In one example, the second electrode (39) may be a transparent electrode such as a transparent conductive oxide or a transparent conductive nitride, or may include graphene. The second electrode (39) may include at least one of Al, Au, Cr, Ni, Ti, and Sn.

[0056] Referring to FIG. 4b, in one example, the light-emitting diode chip (40B) can be understood to be similar to the light-emitting diode chip (40A) shown in FIG. 4a, except for the structure related to the electrodes. Unless specifically stated otherwise, the description of the components of this example may refer to the description of components identical or similar to the light-emitting diode chip (40A) shown in FIG. 4a. The light-emitting diode chip (40B) may include first and second electrodes (48, 49) connected to the first and second conductive semiconductor layers (44, 46), respectively.

[0057] The first electrode (48) may include a connecting electrode portion (48a) connected to the first conductive semiconductor layer (44) by penetrating the second conductive semiconductor layer (46) and the active layer (45), and a first electrode pad (48b) connected to the connecting electrode portion (48a). The connecting electrode portion (48a) may have a structure such as a conductive via. The connecting electrode portion (48a) may be electrically isolated from the active layer (45) and the second conductive semiconductor layer (46) by being surrounded by an insulating portion (47). The connecting electrode portion (48a) may be placed in an etched area of ​​the semiconductor stack (S). The number, shape, pitch, or contact area with the first conductive semiconductor layer (44) of the connecting electrode portion (48a) may be appropriately designed to lower the contact resistance. Additionally, the connecting electrode portion (48a) may be arranged in rows and columns on the semiconductor stack (S) to improve current flow.

[0058] The second electrode (49) may include an ohmic contact layer (49a) and a second electrode pad (49b) on the second conductivity semiconductor layer (46). The connecting electrode portion (48a) and the ohmic contact layer (49a) may each include a single layer or a multilayer structure of a conductive material having ohmic characteristics with the first and second conductivity semiconductor layers (44, 46). For example, they may be formed by a process such as depositing or sputtering one or more of a metal such as Ag, Al, Ni, Cr, and a transparent conductive oxide (TCO) such as ITO. The first and second electrode pads (48, 49) may be connected to the connecting electrode portion (48a) and the ohmic contact layer (49a), respectively, and function as external terminals of the light-emitting diode chip (40B). For example, the first and second electrode pads (48b, 49b) may be Au, Ag, Al, Ti, W, Cu, Sn, Ni, Pt, Cr, NiSn, TiW, AuSn, or eutectic metals thereof.

[0059] The first and second electrodes (48, 49) can be arranged in the same direction and mounted in a so-called flip-chip form on a lead frame, etc. Meanwhile, the two electrodes (48, 49) can be electrically separated from each other by an insulating part (47). Any material having electrical insulating properties can be used for the insulating part (47), and any object having electrical insulating properties can be employed, but a material with a low light absorption rate can be used. For example, silicon oxide or silicon nitride may be used. In one example, the insulating part (47) may form a light-reflecting structure by dispersing light-reflecting powder within a light-transmitting material. Alternatively, the insulating part (47) may be a multilayer reflective structure in which a plurality of insulating films having different refractive indices are alternately stacked. For example, the insulating part (47) may be a Distributed Bragg Reflector (DBR) in which a first insulating film having a first refractive index and a second insulating film having a second refractive index are alternately stacked. A multilayer reflective structure may have multiple insulating films with different refractive indices stacked repeatedly from 2 to 100 times. For example, it may be stacked repeatedly from 3 to 70 times, and further stacked repeatedly from 4 to 50 times. Each of the multiple insulating films of the multilayer reflective structure may be an oxide or nitride such as SiO2, SiN, SiOxNy, TiO2, Si3N4, Al2O3, TiN, AlN, ZrO2, TiAlN, TiSiN, etc., or a combination thereof. The refractive indices of the first insulating film and the second insulating film may be determined in the range of about 1.4 to about 2.5, and may be smaller than the refractive index of the first conductive semiconductor layer (44) and the refractive index of the substrate (41), but may have a value that is smaller than the refractive index of the first conductive semiconductor layer (44) but larger than the refractive index of the substrate (41).

[0061] <1st example>

[0063] Hereinafter, with reference to FIGS. 5 and 6, the features of an LED lighting device according to a first embodiment of the present invention will be described in detail. FIG. 5 is the emission spectrum of white light (D) and tuning blue light (M) emitted from an LED light source and a tuning LED light source, respectively, of an LED lighting device according to a first embodiment of the present invention, and FIG. 6 is the emission spectra (A1, A2, A3, A4, A5, A6, A7, A8, A9, A10) of tuned white light emitted from an LED lighting device according to the embodiment of FIG. 5. FIG. 5 illustrates the emission spectrum of white light (D) with a color temperature of 6500K and tuning blue light (M) having a peak intensity of 480nm.

[0065] Referring to FIG. 5, a first embodiment of the present invention may include a first LED light source illustrated in FIG. 2a and a tuning LED light source illustrated in FIG. 3a or 3b. The first LED light source may be configured to emit a first white light (D) having two peak intensities in a melanopic sensitive band (MS) and color rendering adjusted by a wavelength conversion material. The tuning LED light source may be configured to emit a tuning blue light (M) having a peak intensity in a melanopic sensitive band (MS). For example, the first LED light source may emit a first white light (D) which is a combination of a first blue light having a peak wavelength in the range of 435 nm to 465 nm, a second blue light having a peak wavelength in the range of 465 nm to 495 nm, a first light having a peak wavelength in the range of 520 nm to 560 nm, and a second light having a peak wavelength in the range of 590 nm to 655 nm. Additionally, for example, the tuning LED light source may emit tuning blue light (M) having a peak wavelength in the range of 465 nm to 495 nm. In the first embodiment of the present invention, the driving control unit ("20" in FIG. 1) controls the first LED light source and the tuning LED light source, respectively, to form a tuned white light in which the first white light (D) and the tuning blue light (M) are combined. The tuned white light of the first embodiment may have an emission spectrum in which the M / P ratio is maximized. Hereinafter, the characteristics of the tuned white light of the first embodiment will be described with reference to FIG. 6 and Tables 1 to 3.

[0067] The tuned white light of the first embodiment may have a color temperature (CCT) in the range of about 3000K to 20000K, a color rendering index (CRI) in the range of about 30 to 85, and an M / P ratio in the range of about 0.6 to 2.5. Additionally, in the spectrum of the tuned white light of the first embodiment, the ratio (SB / B) of the peak intensity (SB) of the second blue light to the peak intensity (B) of the first blue light may be in the range of 1 to 20, and the ratio (P / B) of the maximum peak intensity (P) of the 530nm to 680nm band to the peak intensity (B) of the first blue light may be in the range of 0.5 to 3.5. In the first embodiment, the first M / P ratio of the first white light of the first LED light source may be in the range of about 0.6 to 1.2 or about 0.65 to 1.2, and the second M / P ratio of the tuned white light may be in the range of about 0.6 to 2.5. When maximizing the second M / P ratio of the tuned white light, the second M / P ratio of the tuned white light may be 1.2 or greater or 2 or greater. For example, in the first embodiment, the second M / P ratio of the tuned white light may be about 1.2 to 2.4 or about 2 to 2.4 or about 2.1 to 2.35.

[0068] This involves designing a spectrum of tuned white light by combining a first white light (D), which is a combination of a first blue light having a peak wavelength of 450 nm, a second blue light having a peak wavelength of 480 nm, a first light having a peak wavelength in the range of 520 nm to 560 nm, and a second light having a peak wavelength in the range of 590 nm to 655 nm, with a tuning blue light having a peak wavelength of 480 nm in the test example, wherein the color temperature of the first white light (D) is varied to 3000K, 3500K, 4000K, 5000K, 5700K, and 6500K, and the intensity of the tuning blue light (SB) relative to the intensity of the first blue light at each color temperature of the first white light (D) is varied in the range of 0 to 20, thereby determining the color temperature (CCT), M / P ratio (M / P), color rendering index (CRI), and the peak of the first blue light of the tuned white light. The ratio (SB / B) of the peak intensity (SB) of the tuning blue light to the intensity (B), and the ratio (P / B) of the maximum peak intensity (P) of the 530nm–680nm band to the peak intensity (B) of the first blue light were measured and calculated. The ratio (P / B) of the maximum peak intensity (P) of the 530nm–680nm band to the peak intensity (B) of the first blue light is the maximum peak intensity (P) of the 530nm–680nm band measured by assuming the peak intensity (B) of the first blue light is 1. Some test examples in which upper and / or lower limits were observed among the characteristics of the tuned white light are shown in Tables 1 to 3 below.

[0069] FIG. 6 shows the spectra (A1, A2, A3, A4, A5, A6, A7, A8, A9, A10) of the respective tuned white light in the above-described test example, where the color temperature of the first white light (D) was set to 3000K and the relative intensity (SB) of the tuning blue light was changed to 0, 0.1, 0.5, 1.1, 2.2, 4.4, 6.6, 8.8, 13.1, 17.5, and 19.7. In order to verify the optical characteristics, such as the color temperature of the first white light (D) before tuning, 0 was included in the relative intensity (SB) of the tuning blue light. In addition, the color temperature, etc., were measured in the spectra (A1, A2, A3, A4, A5, A6, A7, A8, A9, A10) of FIG. 6 and are shown in Table 1. In addition, the color temperature of the first white light (D) was set to 5000K and 6500K, respectively, and the color temperature of the spectrum of each tuned white light was measured while changing the relative intensity (SB) of the tuning blue light, and is shown in Tables 2 and 3. In Tables 2 and 3, the calculation of the spectrum and the measurement of optical characteristics were performed in the same manner as in Figure 6 and Table 1.

[0071] D(CCT) SB CCT M / P CRI SB / B P / B 3000K 0 3069 0.65 84.1 2.2 3.3 0.1 3079 0.65 84.0 2.2 3.3 0.5 3189 0.72 83.0 2.7 3.3 1.1 3317 0.78 81.6 3.2 3.3 2.2 3596 0.90 77.8 4.2 3.2 4.4 4260 1.14 69.0 6.2 3.2 6.6 5087 1.35 61.1 8.2 3.1 8.8 6097 1.55 53.4 10.0 3.0 13.1 8829 1.90 41.8 13.5 2.9 17.5 13246 2.21 34.2 16.8 2.8 19.7 16798 2.34 31.4 18.3 2.8

[0073] D(CCT) SB CCT M / P CRI SB / B P / B 5000K 0 5018 1.03 83.6 1.6 1.0 0.39 5457 1.14 80.7 1.9 1.0 0.77 5940 1.25 77.2 2.3 1.0 1.5 7049 1.45 70.4 3.0 1.0 3.1 10059 1.80 59.0 4.5 1.0 4.6 15155 2.11 50.7 5.9 1.0 5.4 19480 2.25 47.4 6.6 1.0

[0075] D(CCT) SB CCT M / P CRI SB / B P / B 6500K 0 6308 1.20 83.2 1.4 0.7 0.33 7048 1.33 79.2 1.7 0.7 0.67 7885 1.45 75.1 2.0 0.7 1.3 9944 1.68 67.7 2.6 0.7 2.7 17168 2.08 56.3 3.9 0.7

[0077] Referring to Tables 1 to 3, the tuned white light of the first embodiment has a maximum color temperature (about 20,000K or less) at a color temperature of 5,000K of the first white light (D) and a relative intensity (SB) of 5.4 of the tuning blue light, and has a minimum color temperature (about 3,000K or more) at a color temperature of 3,000K of the first white light (D) and a relative intensity (SB) of 0.1 of the tuning blue light. Additionally, the tuned white light of the first embodiment has a maximum M / P ratio (about 2.5 or less) at a color temperature of 3,000K of the first white light (D) and a relative intensity (SB) of 19.7 of the tuning blue light, and has a minimum M / P ratio (about 0.6 or more) at a color temperature of 3,000K of the first white light (D) and a relative intensity (SB) of 0.1 of the tuning blue light. Additionally, the tuned white light of the first embodiment has a minimum color rendering index (about 30 or higher) at a color temperature of 3000K of the first white light (D) and a relative intensity (SB) of 19.7 of the tuning blue light, and a maximum color rendering index (about 85 or lower) at a color temperature of 3000K of the first white light (D) and a relative intensity (SB) of 0.1 of the tuning blue light. In particular, the ratio (SB / B) of the peak intensity (B) of the tuning blue light to the peak intensity (SB) of the first blue light has a maximum value (about 20 or lower) at a color temperature of 3000K and a relative intensity (SB) of 19.7 of the tuning blue light, and a minimum value (about 1 or higher) at a color temperature of 6500K and a relative intensity (SB) of 0.33 of the tuning blue light. This can be understood as a factor affecting the M / P ratio. In addition, the ratio (P / B) of the maximum peak intensity (P) of the 530nm–680nm band to the peak intensity (B) of the first blue light has a maximum value (about 3.5 or less) at a color temperature of 3000K and a relative intensity (SB) of 0.1 of the blue light for tuning, and a minimum value (about 0.5 or more) at a color temperature of 6500K and a relative intensity (SB) of 2.7 of the blue light for tuning. This can be understood as a factor that primarily affects the color rendering index.Thus, the LED lighting device of the first embodiment can select color temperature, color rendering index, and M / P ratio over a wide range to satisfy the optical characteristics of human-centered white light required according to specific situations, and in particular, can obtain tuned white light with a maximized M / P ratio.

[0079] <2nd example>

[0081] Hereinafter, with reference to FIGS. 7 and 8, the features of an LED lighting device according to a second embodiment of the present invention will be described in detail. FIG. 7 is the emission spectrum of white light (N) and tuning blue light (M) emitted from an LED light source and a tuning LED light source, respectively, of an LED lighting device according to a second embodiment of the present invention, and FIG. 8 is the emission spectra (B1, B2, B3, B4, B5, B6, B7, B8, B9, B10) of tuned white light emitted from an LED lighting device according to the embodiment of FIG. 7. FIG. 7 illustrates the emission spectrum of white light (N) with a color temperature of 1800K and tuning blue light (M) having a peak intensity of 480nm.

[0083] Referring to FIG. 7, a second embodiment of the present invention may include a second LED light source illustrated in FIG. 2b and a tuning LED light source illustrated in FIG. 3a or 3b. The second LED light source may be configured to emit a second white light (N) with a controlled intensity in a melanophytic sensitive band (MS). The tuning LED light source may be configured to emit a tuning blue light (M) having a peak intensity in a melanophytic sensitive band (MS), as in the first embodiment. For example, the second LED light source may emit a second white light (N) in combination with a third blue light having a peak wavelength in the range of 435 nm to 465 nm, a third light excited by the third blue light having a peak wavelength in the range of 540 nm to 560 nm and a full width at half maximum of 60 nm or less, and a fourth light excited by the third blue light having a peak wavelength in the range of 620 nm to 650 nm. Additionally, for example, the tuning LED light source can emit tuning blue light (M) having a peak wavelength in the range of 465 nm to 495 nm. In the second embodiment of the present invention, the driving control unit ("20" in FIG. 1) controls the second LED light source and the tuning LED light source, respectively, to form a tuned white light in which the second white light (N) and the tuning blue light (M) are combined. The tuned white light of the second embodiment can have an emission spectrum with improved color rendering while maintaining the M / P ratio at a constant level.

[0085] Hereinafter, the characteristics of the tuned white light of the second embodiment will be explained with reference to FIG. 8 and Tables 4 to 6.

[0087] The tuned white light of the second embodiment may have a color temperature in the range of about 1800K to 20000K, a color rendering index in the range of about 3 to 97, and an M / P ratio in the range of about 0.2 to 2.6. Additionally, in the spectrum of the tuned white light of the second embodiment, the ratio (SB / B) of the peak intensity of the tuning blue light (SB) to the peak intensity (B) of the third blue light may be in the range of 0.5 to 45, and the ratio (P / B) of the maximum peak intensity (P) in the 530nm to 680nm band to the peak intensity (B) of the third blue light may be in the range of 0.5 to 10.5. In the second embodiment, the first M / P ratio of the second white light may be about 0.7 or less or about 0.65 or less, for example, in the range of about 0.19 to 0.62 or about 0.5 to 0.62, and the second M / P ratio of the tuned white light may be in the range of about 0.2 to 2.6. Additionally, to ensure the color rendering of the tuned white in the second embodiment, the color rendering index of the second white light may be about 80 or more, and the color rendering index of the tuned white in the second embodiment may be about 85 or more, for example, about 85 to 97 or about 88 to 97. In this case, the second M / P ratio of the tuned white light may be in the range of about 0.2 to 1.1.

[0088] This involves designing a spectrum of tuned white light by combining a second white light (N), which is a combination of a third blue light having a peak wavelength of 450 nm, a third light emitted by a third wavelength conversion material (β-SiAlON), and a fourth light emitted by a fourth wavelength conversion material ((Sr,Ca)AlSiN3:Eu), with a tuning blue light (M) having a peak wavelength of 480 nm in the test example, wherein the color temperature of the second white light (N) is varied to 1800K, 2200K, 2700K, 3000K, 3500K, and 4000K, and the intensity of the tuning blue light (SB) relative to the intensity of the third blue light (B) at each color temperature of the second white light (N) is varied in the range of 0 to 53, thereby determining the color temperature (CCT), M / P ratio (M / P), color rendering index (CRI), and third blue light of the tuned white light. The ratio (SB / B) of the peak intensity (SB) of the tuning blue light to the peak intensity (B) of the light, and the ratio (P / B) of the maximum peak intensity (P) of the 530nm–680nm band to the peak intensity (B) of the third blue light were measured and calculated. The ratio (P / B) of the maximum peak intensity (P) of the 530nm–680nm band to the peak intensity (B) of the third blue light is the maximum peak intensity (P) of the 530nm–680nm band measured by assuming the peak intensity (B) of the third blue light is 1. Some test examples showing upper and lower limits among the characteristics of the tuned white light are shown in Tables 4 to 6 below.

[0089] FIG. 8 shows the spectra (B1, B2, B3, B4, B5, B6, B7, B8, B9, B10) of the respective tuned white light in the above-described test example, where the color temperature of the second white light (N) was set to 1800K and the relative intensity (SB) of the tuning blue light was changed to 0, 1, 2, 5, 10, 20, 30, 40, 50, and 53. In order to verify the optical characteristics, such as the color temperature of the second white light (N) before tuning, 0 was included in the relative intensity (SB) of the tuning blue light. In addition, the color temperature, etc., described above were measured in the spectra (B1, B2, B3, B4, B5, B6, B7, B8, B9, B10) of FIG. 8 and are shown in Table 4. In addition, the color temperature of the second white light (N) was set to 2700K and 4000K, respectively, and the color temperature of the spectrum of each tuned white light was measured while changing the relative intensity (SB) of the tuning blue light, and the results are shown in Tables 5 and 6, respectively. In Tables 5 and 6, the calculation of the spectrum and the measurement of optical characteristics were performed in the same manner as in Figure 8 and Table 4.

[0091] D(CCT) SB CCT M / P CRI SB / B P / B 1800K 0 1819 0.19 84.8 0.4 10.3 1 1871 0.26 88.9 1.2 10.3 2 1924 0.33 90.2 2.2 10.2 5 2094 0.53 83.6 5.3 10.0 10 2425 0.82 69.4 10.1 9.7 20 3442 1.34 43.3 18.9 9.2 30 5455 1.76 22.4 26.7 8.7 40 8909 2.12 10.2 33.8 8.2 50 15188 2.43 4.8 40.2 7.8 53 18385 2.51 3.8 42.0 7.7

[0093] D(CCT) SB CCT M / P CRI SB / B P / B 2700K 0 2764 0.37 83.7 0.4 1.8 1 3160 0.62 96.3 1.1 1.8 2 3648 0.84 89.3 2.1 1.7 5 5878 1.42 62.6 4.9 1.7 10 14180 2.16 39.8 9.5 1.7 11 17713 2.28 37.2 10.4 1.7

[0095] D(CCT) SB CCT M / P CRI SB / B P / B 4000K 0 3974 0.62 84.8 0.7 0.9 0.25 4287 0.73 90.4 0.8 0.9 0.5 4633 0.84 93.6 0.9 0.9 0.8 5091 0.97 93.9 1.2 0.9 1 5424 1.05 91.8 1.4 0.9 2 7482 1.42 76.9 2.7 0.9 4.5 19579 2.15 54.3 5.7 0.9

[0097] Referring to Tables 4 to 6, the tuned white light of the second embodiment has a maximum color temperature (about 20,000K or less) at a color temperature of 4,000K for the second white light (N) and a relative intensity (SB) of 4.5 for the tuning blue light, and has a minimum color temperature (about 1,800K or more) at a color temperature of 1,800K for the second white light (N) and a relative intensity (SB) of 1 for the tuning blue light. Additionally, the tuned white light of the second embodiment has a maximum M / P ratio (about 2.6 or less) at a color temperature of 1,800K for the second white light (N) and a relative intensity (SB) of 53 for the tuning blue light, and has a minimum M / P ratio (about 0.2 or more) at a color temperature of 1,800K for the second white light (N) and a relative intensity (SB) of 1 for the tuning blue light. Additionally, the tuned white light of the second embodiment has a minimum color rendering index (about 3 or higher) at a color temperature of 1800K of the second white light (N) and a relative intensity (SB) of 53 of the tuning blue light, and a maximum color rendering index (about 97 or lower) at a color temperature of 2700K of the second white light (N) and a relative intensity (SB) of 1 of the tuning blue light. In particular, the ratio (SB / B) of the peak intensity (B) of the tuning blue light to the peak intensity (SB) of the third blue light has a maximum value (about 45 or lower) at a color temperature of 1800K and a relative intensity (SB) of 53 of the tuning blue light, and a minimum value (about 0.5 or higher) at a color temperature of 4000K and a relative intensity (SB) of 0.25 of the tuning blue light. In addition, the ratio (P / B) of the maximum peak intensity (P) of the 530nm to 680nm band to the peak intensity (B) of the third blue light has a maximum value (about 10.5 or less) at a color temperature of 1800K and a relative intensity (SB) of the tuning blue light of 1, and a minimum value (about 0.5 or more) at a color temperature of 4000K and a relative intensity (SB) of the tuning blue light of 4.5.In this way, the LED lighting device of the second embodiment can obtain tuned white light that allows the selection of color temperature and color rendering index over a wide range while maintaining the M / P ratio at a constant level so as to satisfy the optical characteristics of human-centered white light required according to specific situations.

[0099] FIG. 9 is a block diagram of an LED lighting device according to an embodiment of the present invention, FIG. 10a is a light emission spectrum of a first white light (D) and a second white light (N) emitted respectively from a first LED light source and a second LED light source of an LED lighting device according to the embodiment of FIG. 9, and FIG. 10b is a graph for explaining the selective control of the first LED light source and the second LED light source of an LED lighting device according to the embodiment of FIG. 9. FIG. 10a shows the light emission spectrum of a first white light (D) with a color temperature of 6500K and a second white light (N) with a color temperature of 1800K.

[0101] Referring to FIG. 9, an LED lighting device according to one embodiment of the present invention may include the first and second LED light sources of FIG. 2a and 2b, excluding a tuning LED light source. For example, the first LED light source (10Aa) comprises a first light-emitting diode emitting a first blue light having a peak wavelength in the range of 435 nm to 465 nm, a second light-emitting diode emitting a second blue light having a peak wavelength in the range of 465 nm to 495 nm, a first wavelength conversion material excited by the first and second blue lights to emit a first light having a peak wavelength of 520 nm to 560 nm, and a second wavelength conversion material emitting a second light having a peak wavelength of 600 nm to 645 nm, and is configured to emit a first white light, and the second LED light source (10Ab) comprises a third light-emitting diode emitting a third blue light having a peak wavelength in the range of 435 nm to 465 nm, a third wavelength conversion material excited by the third blue light to emit a third light having a peak wavelength in the range of 540 nm to 560 nm and a half-width of 60 nm or less, and by the third blue light It may include a fourth wavelength conversion material that emits a fourth light having a peak wavelength in the range of 620 nm to 650 nm and may be configured to emit a second white light. Additionally, the driving control unit (20) may control the current (I1, I2) applied to the first LED light source (10Aa) and the second LED light source (Ab), respectively, to form tuned white light. In one embodiment, the LED lighting device may combine the first and second LED light sources satisfying specific conditions to provide human-centered white light with adjusted color temperature, M / P ratio, etc. Since the elements of the LED lighting device illustrated in FIG. 9 have the same or similar characteristics as the elements described in FIG. 1, redundant descriptions are omitted.

[0103] Referring together with FIG. 10a, in one embodiment of the present invention, a first LED light source (10Aa) may be configured to emit a first white light (D) with two peak intensities in the melanopic sensitive band (MS) as in the first embodiment and with color rendering adjusted by a wavelength conversion material, and a second LED light source (10Ab) may be configured to emit a second white light (N) with intensity adjusted in the melanopic sensitive band (MS) as in the second embodiment. In one embodiment, a driving control unit (20) may control the first and second LED light sources, respectively, to form a tuned white light in which the first and second white lights (D, N) are combined. The tuned white light of one embodiment may have an emission spectrum with an adjusted M / P ratio while maintaining a high level of color rendering.

[0105] Referring together with FIG. 10b, the first LED light source (10Aa) and the second LED light source (10Ab) of one embodiment may be combined with different color temperatures. The first LED light source (10Aa) and the second LED light source (10Ab) may each have a specific range of color temperatures, but are not limited thereto, the first white light (D) of the first LED light source (10Aa) may be implemented in a higher color temperature range than the second white light (N) of the second LED light source (10Ab). For example, the first white light (D) may have a color temperature in the range of 3000K to 6500K, and the second white light (N) may have a color temperature in the range of 1800K to 4000K. Test examples (I, II, III) capable of representing the upper and lower limits of the characteristics of the tuned white light of the third embodiment described later among the color temperatures of the first white light (D) and the second white light (N) shown in FIG. 10b are shown in Tables 7 to 9 below.

[0107] <3 example>

[0109] Hereinafter, the characteristics of tuned white light according to the third embodiment of the present invention will be described with reference to FIG. 11 and Tables 7 to 9. FIG. 11 is the emission spectra (C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11) of tuned white light emitted from an LED lighting device according to the third embodiment of the present invention.

[0111] The tuned white light of the third embodiment may have a color temperature in the range of about 1800K to 6500K, a color rendering index in the range of about 80 to 95, and an M / P ratio in the range of about 0.2 to 1.2. Additionally, in the spectrum of the tuned white light of the third embodiment, the ratio (SB / B) of the peak intensity of the second blue light (SB) (or peak intensity in the range of 465nm to 495nm) to the peak intensity (B) of the third blue light (or peak intensity in the range of 435nm to 465nm) may be in the range of about 0.2 to 2.5, and the ratio (P / B) of the maximum peak intensity (P) of the 530nm to 680nm band to the peak intensity (B) of the third blue light may be in the range of about 0.5 to 9. This is designed such that the first white light (D) and the second white light (N) are designed in the same manner as the test examples of the first and second embodiments in the test example, but the color temperature of the first white light (D) is varied to 3000K, 3500K, 4000K, 5000K, 5700K, and 6500K, and the color temperature of the second white light (N) is varied to 1800K, 2200K, 2700K, 3000K, 3500K, and 4000K, and the intensity ratio of the first white light (D) and the second white light (N) in each color temperature combination is 1:0, 0.9:0.1, 0.8:0.2, 0.7:0.3, 0.6:0.4, 0.5:0.5, 0.4:0.6, 0.3:0.7, and 0.2:0.8. The values ​​were calculated by varying the ratios to 0.1:0.9 and 0:1 and measuring each value. The intensity ratio of the first white light (D) and the second white light (N) represents the intensity ratio of each when the sum of the intensities of the first white light (D) and the second white light (N) is 1. Some test examples showing upper and lower limits among the characteristics of the tuned white light of the third embodiment are shown in Tables 7 to 9 below.

[0112] FIG. 11 shows the spectra of white light (C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11) tuned by changing the relative intensity of the first white light (D) and the second white light (N) among the test examples of the third embodiment, with the color temperature of the first white light (D) set to 3000K and the color temperature of the second white light (N) set to 1800K. To verify the optical characteristics, such as the color temperature of the first and second white lights (D, N) before tuning, zero was included in each intensity. In addition, the color temperature, etc. described above was measured in the spectra of FIG. 11 (C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11) and is shown in Table 7. In addition, the color temperatures of the tuned white light in test examples in which the color temperatures of the first and second white lights (D, N) were set to 6500K and 2700K, respectively, and in test examples in which the color temperatures of the first and second white lights (D, N) were set to 6500K and 4000K, respectively, were measured and are shown in Tables 8 and 9, respectively. In Tables 8 and 9, the calculation of the spectrum and the measurement of optical characteristics were performed in the same manner as in Fig. 11 and Table 7.

[0114] D:N(CCT) D:N(intensity) CCT M / P CRI SB / B P / B 3000K:1800k 1:0 3069 0.65 84.1 2.2 3.3 0.9:1 2933 0.62 85.1 2.1 3.5 0.8:0.2 2799 0.58 86.0 2.0 3.7 0.7:0.3 2666 0.54 86.9 1.9 4.0 0.6:0.4 2536 0.50 87.8 1.8 4.4 0.5:0.5 2409 0.46 88.5 1.6 4.8 0.4:0.6 2285 0.42 89.2 1.5 5.4 0.3:0.7 2164 0.37 89.5 1.2 6.1 0.2:0.8 2046 0.31 89.1 1.0 7.0 0.1:0.9 1931 0.26 87.4 0.6 8.1 0:1 1819 0.19 84.8 0.4 9.8

[0116] D:N(CCT) D:N(intensity) CCT M / P CRI SB / B P / B 6500K:2700k 1:0 6308 1.20 83.2 1.4 0.7 0.9:1 5735 1.12 85.7 1.3 0.7 0.8:0.2 5223 1.04 88.1 1.2 0.8 0.7:0.3 4767 0.96 90.0 1.1 0.8 0.6:0.4 4363 0.88 92.3 1.0 0.9 0.5:0.5 4005 0.79 94.1 0.9 1.0 0.4:0.6 3689 0.71 94.2 0.8 1.1 0.3:0.7 3411 0.63 92.8 0.7 1.2 0.2:0.8 3167 0.54 90.4 0.5 1.4 0.1:0.9 2953 0.46 87.3 0.4 1.6 0:1 2764 0.37 83.7 0.4 1.8

[0118] D:N(CCT) D:N(intensity) CCT M / P CRI SB / B P / B 6500K:4000k 1:0 6308 1.20 83.2 1.4 0.7 0.9:1 5967 1.14 85.8 1.3 0.7 0.8:0.2 5657 1.08 88.3 1.1 0.7 0.7:0.3 5375 1.01 90.4 1.0 0.7 0.6:0.4 5119 0.95 92.1 0.9 0.7 0.5:0.5 4884 0.90 92.0 0.8 0.7 0.4:0.6 4669 0.84 91.5 0.7 0.7 0.3:0.7 4473 0.78 90.6 0.7 0.7 0.2:0.8 4292 0.73 89.1 0.7 0.8 0.1:0.9 4126 0.67 87.1 0.6 0.8 0:1 3974 0.62 84.8 0.6 0.8

[0120] Referring to Tables 7 to 9, the tuned white light of the third embodiment has a maximum color temperature (about 6500K or less) at a color temperature of 6500K:4000K for the first and second white lights (D, N) and an intensity ratio of 0.9:0.1 for the first and second white lights (D, N), and has a minimum color temperature (about 1800K or more) at a color temperature of 3000K:1800K for the first and second white lights (D, N) and an intensity ratio of 0.1:0.9 for the first and second white lights (D, N). In addition, the tuned white light of the third embodiment has a maximum M / P ratio (about 1.2 or less) at a color temperature of 6500K:4000K of the first and second white lights (D, N) and an intensity ratio of 0.9:0.1 of the first and second white lights (D, N), and has a minimum M / P ratio (about 0.2 or more) at a color temperature of 3000K:1800K of the first and second white lights (D, N) and an intensity ratio of 0.1:0.9 of the first and second white lights (D, N). In addition, the tuned white light of the third embodiment has a maximum color rendering index (about 95 or less) at a color temperature of 6500K:2700K of the first and second white lights (D, N) and an intensity ratio of 0.5:0.5 of the first and second white lights (D, N), and maintains a color rendering index of about 80 or more across the entire color temperature range of the first and second white lights (D, N).

[0121] In addition, the ratio (SB / B) of the peak intensity (SB) in the range of 465 nm to 495 nm to the peak intensity (B) in the range of 435 nm to 465 nm has a maximum value (about 2.5 or less) at a color temperature of 3000 K:1800 K for the first and second white light (D, N) and an intensity ratio of 0.9:0.1 for the first and second white light (D, N), and has a minimum value (about 0.2 or more) at a color temperature of 6500 K:2700 K for the first and second white light (D, N) and an intensity ratio of 0.1:0.9 for the first and second white light (D, N). In addition, the ratio (P / B) of the maximum peak intensity (P) in the 530nm to 680nm band to the peak intensity (B) in the 435nm to 465nm range has a maximum value (about 9 or less) at a color temperature of 3000K:1800K of the first and second white lights (D, N) and an intensity ratio of 0.1:0.9 of the first and second white lights (D, N), and has a minimum value (about 0.5 or more) at a color temperature of 6500K:2700K of the first and second white lights (D, N) and an intensity ratio of 0.9:0.1 of the first and second white lights (D, N). Thus, the LED lighting device of the third embodiment can obtain tuned white light in which the M / P ratio and color rendering index can be selected to a certain level to satisfy the optical characteristics of human-centered white light required according to specific situations.

[0123] In order to obtain the tuned white light of the third embodiment described above, a first white light (D) and a second white light (N) satisfying specific spectral conditions are required. This will be explained below with reference to FIG. 10a and FIG. 12.

[0124] First, referring again to FIG. 10a, in the spectrum of the first white light (D) emitted from the first LED light source, the peak intensity of the second blue light (or the peak intensity in the range of 465 nm to 495 nm) may be 50% or more relative to the peak intensity of the first blue light (or the peak intensity in the range of 435 nm to 465 nm). For a BLH reduction effect, the ratio of the peak intensities of the first and second blue lights may be 70% or more, and furthermore, the peak intensity of the second blue light may be selected to be greater than the peak intensity of the first blue light. Here, the wavelength and intensity ratio of the second blue light may be adjusted within a range where the color rendering index is maintained at 80 or higher, preferably 90 or higher. In addition, from the perspective of color rendering, the maximum intensity in the 520 nm to 560 nm band may be in the range of 50% to 160% of the peak intensity of the second blue light.

[0126] FIG. 12 is the emission spectrum of the second white light of the light-emitting device that can be employed as the second LED light source in the embodiment of FIG. 9. FIG. 12 shows emission spectra (D1, D2, D3, D4, D5, D6) with different color temperatures (1800K, 2200K, 2700K, 3000K, 3500K, 4000K) designed by combining a third wavelength-converting material (β-SiAlON) and a fourth wavelength-converting material ((Sr,Ca)AlSiN3:Eu) together with a light-emitting diode emitting a third blue light of 445 nm wavelength, and adjusting the mixing ratio of the first and second wavelength-converting materials.

[0127] Referring to FIG. 12, the second white light of the second LED light source that can be employed in the present invention may satisfy two spectral conditions. First, the first spectral condition can be defined as the ratio of light emitted from the blue LED (i.e., unconverted emitted light from the blue LED (①)) to the light (②) in the entire blue wavelength band of the spectrum of the final white light. Here, the integrated amount of light of ① is expressed as the integrated amount of the spectrum corresponding to the 440 nm to 460 nm band, and the integrated amount of light of ② can be expressed as the integrated amount of the spectrum corresponding to the 380 nm to 500 nm band. The integrated amount of light of ① has a constant ratio in proportion to the integrated amount of light of ②, but the integrated amount of light of ② may have a relatively small value because the amount of light in the melanophyte-related wavelength band is reduced compared to white light according to the conventional method. As shown in Table 10 below, the ratio (① / ②) according to the first spectral condition may be in the range of 50% to 65%.

[0128] In addition, the second spectral condition can be defined as the ratio of light in the cyan band (ⓐ) to light in the green band (ⓑ) in the spectrum of the final white light. Here, the integrated amount of light in ⓐ is expressed as the integrated amount of the spectrum corresponding to the 480 nm to 500 nm band, and the integrated amount of light in ⓑ can be expressed as the integrated amount of the spectrum corresponding to the 540 nm to 550 nm band. The integrated amount of light in ⓐ is a light amount related to the melotonic ratio, and can have a relatively small value as the melanopic ratio decreases. As shown in Table 10 below, the ratio (ⓐ / ⓑ) according to the second spectral condition can be 30% or less.

[0130] item D1 D2 D3 D4 D5 D6 temperature(K) 1800 2200 2700 3000 3500 4200 spectrum condition1(① / ②) 55% 58% 63% 57% 58% 56% spectrum condition2(ⓐ / ⓑ) 4.1% 5.1% 5.3% 14% 16% 25%

[0132] In this way, the second white light of the second LED light source that can be employed in the embodiments of the present invention may have a spectrum in which the integrated light amount of 440 nm to 460 nm is in the range of 50% to 65% of the integrated light amount of 380 nm to 500 nm, and the integrated light amount of 480 nm to 500 nm is in the range of 30% or less of the integrated light amount of 540 nm to 560 nm.

[0133] In addition, the second spectral condition is a value related to the melanopic ratio and can be further classified according to color temperature. For example, when the color temperature of the white light is in the range of 1800K to 2800K, the integrated light amount of 480 nm to 500 nm may be in the range of 6% or less of the integrated light amount of 540 nm to 560 nm, and when the color temperature of the white light is in the range of 2800K to 4000K, the integrated light amount of 480 nm to 500 nm may be in the range of 10% to 30% of the integrated light amount of 540 nm to 560 nm.

[0135] FIG. 13 is a block diagram of an LED lighting device according to an embodiment of the present invention, and FIG. 14 is a light emission spectrum of a first white light (D), a second white light (N), and a tuning blue light (M) emitted respectively from a first LED light source, a second LED light source, and a tuning LED light source of an LED lighting device according to the embodiment of FIG. 13. FIG. 14 illustrates the light emission spectrum of a first white light (D) with a color temperature of 6500K, a second white light (N) with a color temperature of 1800K, and a tuning blue light (M) having a peak intensity of 480nm.

[0137] Referring to FIG. 13, an LED lighting device according to one embodiment of the present invention may include a tuning LED light source together with first and second LED light sources. In one embodiment, a driving control unit (20) may control currents (I1, I2, I3) applied to the first LED light source (10Aa), the second LED light source (Ab), and the tuning LED light source (B), respectively, to form tuned white light. In one embodiment, the LED lighting device may provide human-centered white light with a high M / P ratio or color rendering index. Since the first and second LED light sources and the tuning LED light source of FIG. 13 have the same or similar characteristics as the light sources of the first to third embodiments, a redundant description is omitted.

[0139] Referring together with FIG. 14, in one embodiment of the present invention, a first LED light source (10Aa) may be configured to emit a first white light (D) with two peak intensities in the melanopic sensitive band (MS) as in the first embodiment and with color rendering index controlled by a wavelength conversion material, and a second LED light source (10Ab) may be configured to emit a second white light (N) with intensity controlled in the melanopic sensitive band (MS) as in the second embodiment. Additionally, a tuning LED light source (10B) may be configured to emit a tuning blue light (M) having a peak intensity in the melanopic sensitive band (MS). The tuned white light of one embodiment may have an emission spectrum with a high M / P ratio or color rendering index.

[0141] <4th example>

[0143] Hereinafter, the characteristics of tuned white light according to the fourth embodiment of the present invention will be described with reference to FIG. 15 and Tables 11 to 13. FIG. 15 is the emission spectra (E1, E2, E3, E4, E5, E6, E7, E8, E9) of tuned white light emitted from an LED lighting device according to the embodiment of FIG. 13.

[0145] The tuned white light of the fourth embodiment may have a color temperature in the range of about 1900K to 20000K, a color rendering index in the range of about 7 to 91, and an M / P ratio in the range of about 0.3 to 2.6. Additionally, in the spectrum of the tuned white light of the fourth embodiment, the ratio (SB / B) of the peak intensity (B) of the first or third blue light (or peak intensity in the range of 435nm to 465nm) to the peak intensity (B) of the second blue light (SB) (or peak intensity in the range of 465nm to 495nm) may be in the range of about 1 to 35, and the ratio (P / B) of the maximum peak intensity (P) of the 530nm to 680nm band to the peak intensity (B) of the first or third blue light may be in the range of about 0.5 to 9. This involves changing the color temperature of the first white light (D) to 3000K, 3500K, 4000K, 5000K, 5700K, and 6500K, and changing the color temperature of the second white light (N) to 1800K, 2200K, 2700K, 3000K, 3500K, and 4000K, just like in the test example of the third embodiment; changing the intensities of the first white light (D) and the second white light (N) in each color temperature combination to 1:0, 0.9:0.1, 0.8:0.2, 0.7:0.3, 0.6:0.4, 0.5:0.5, 0.4:0.6, 0.3:0.7, 0.2:0.8, 0.1:0.9, and 0:1, and in each color temperature and intensity combination The intensity of the blue light for tuning (SB) for the first blue light intensity (B) was varied in the range of 0 to 46, and each value was measured and calculated. Some test examples showing upper and lower limits among the characteristics of the tuned white light of the fourth embodiment are shown in Tables 11 to 13 below.

[0147] FIG. 15 shows the spectra (E1, E2, E3, E4, E5, E6, E7, E8, E9) of each tuned white light among the test examples of the fourth embodiment, with the color temperature of the first white light (D) set to 3000K, the color temperature of the second white light (N) set to 1800K, and the relative intensity of the first white light (D) and the second white light (N) set to 10:90, while changing the intensity (SB) of the tuning blue light. To verify the optical characteristics, such as the color temperature of the first and second white lights (D, N) before tuning, the intensity of the tuning blue light (SB) was set to 0. In addition, the color temperature, etc. described above was measured from the spectra of FIG. 15 and is shown in Table 11. In addition, the color temperature of the tuned white light, etc., of the test example in which the color temperatures of the first and second white lights (D, N) were set to 6500K and 4000K, respectively, and the test example in which the color temperatures of the first and second white lights (D, N) were set to 6500K and 2700K, respectively, were measured and are shown in Tables 12 and 13, respectively. In Tables 12 and 13, the calculation of the spectrum and the measurement of optical characteristics were performed in the same manner as in Fig. 15 and Table 11.

[0149] D:N(CCT) D:N(intensity) SB CCT M / P CRI SB / B P / B 3000K:1800K 0.1:0.9 0 1931 0.26 87.4 0.6 8.1 1 1994 0.33 90.3 1.6 8.1 2 2060 0.41 89.3 2.5 8.0 5 2273 0.62 80.5 5.3 7.8 10 2711 0.94 65.5 9.6 7.4 20 4222 1.49 37.8 17.2 6.8 30 7216 1.94 18.7 23.6 6.3 40 12656 2.32 10.0 29.2 5.9 46 19031 2.51 7.3 32.1 5.6

[0151] D:N(CCT) D:N(intensity) SB CCT M / P CRI SB / B P / B 6500K:4000K 0.9:0.1 0 5967 1.14 85.8 1.3 0.7 0.25 6465 1.23 82.9 1.5 0.7 0.5 7009 1.33 79.8 1.7 0.7 1 8257 1.50 73.8 2.2 0.7 2 11706 1.82 63.6 3.1 0.7 3 17812 2.10 55.9 4.1 0.7 3.2 19687 2.15 54.5 4.3 0.7

[0153] D:N(CCT) D:N(intensity) SB CCT M / P CRI SB / B P / B 6500K:2700K 0.5:0.5 0 4005 0.79 94.1 0.9 0.99 0.5 6465 1.23 82.9 1.5 0.99 1 7009 1.33 79.8 1.7 0.98 2 8257 1.50 73.8 2.2 0.97 3 11706 1.82 63.6 3.1 0.96 5 17812 2.10 55.9 4.1 0.95 6 19687 2.15 54.5 4.3 0.94

[0155] Referring to Tables 11 to 13, the tuned white light of the fourth embodiment has a maximum color temperature (about 20000K or less) at a color temperature of 6500K:4000K for the first and second white lights (D, N), an intensity ratio of 0.9:0.1 for the first and second white lights (D, N), and an intensity (SB) of 3.2 for the tuning blue light, and has a minimum color temperature (about 1900K or more) at a color temperature of 3000K:1800K for the first and second white lights (D, N), an intensity ratio of 0.1:0.9 for the first and second white lights (D, N), and an intensity (SB) of 1 for the tuning blue light. In addition, the tuned white light of the fourth embodiment has a maximum M / P ratio (about 2.6 or less) at a color temperature of 3000K:1800K for the first and second white lights (D, N), an intensity ratio of 0.1:0.9 for the first and second white lights (D, N), and an intensity (SB) of 46 for the tuning blue light, and has a minimum M / P ratio (about 0.3 or more) at a color temperature of 3000K:1800K for the first and second white lights (D, N), an intensity ratio of 0.1:0.9 for the first and second white lights (D, N), and an intensity (SB) of 1 for the tuning blue light. In addition, the tuned white light of the fourth embodiment has a maximum color rendering index (about 91 or less) at a color temperature of 3000K:1800K for the first and second white lights (D, N), an intensity ratio of 0.1:0.9 for the first and second white lights (D, N), and an intensity (SB) of 1 for the tuning blue light, and has a minimum color rendering index (about 7 or more) at a color temperature of 3000K:1800K for the first and second white lights (D, N), an intensity ratio of 0.1:0.9 for the first and second white lights (D, N), and an intensity (SB) of 46 for the tuning blue light.

[0156] In addition, the ratio (SB / B) of the peak intensity (SB) in the range of 465 nm to 495 nm (or the peak intensity of the blue light for tuning) to the peak intensity (B) in the range of 435 nm to 465 nm has a maximum value (about 35 or less) at a color temperature of 3000 K:1800 K for the first and second white lights (D, N), an intensity ratio of 0.1:0.9 for the first and second white lights (D, N), and an intensity (SB) of 46 for the blue light for tuning, and has a minimum value (about 1 or more) at a color temperature of 3000 K:1800 K for the first and second white lights (D, N), an intensity ratio of 0.1:0.9 for the first and second white lights (D, N), and an intensity (SB) of 1 for the blue light for tuning. In addition, the ratio (P / B) of the maximum peak intensity (P) in the 530nm to 680nm band to the peak intensity (B) in the 435nm to 465nm range has a maximum value (about 9 or less) at a color temperature of 3000K:1800K for the first and second white lights (D, N), an intensity ratio of 0.1:0.9 for the first and second white lights (D, N), and an intensity (SB) of 1 for the tuning blue light, and has a minimum value (about 0.5 or more) at a color temperature of 6500K:4000K for the first and second white lights (D, N), an intensity ratio of 0.9:0.1 for the first and second white lights (D, N), and an intensity (SB) of 3.2 for the tuning blue light.

[0157] In this way, the LED lighting device of the fourth embodiment can obtain tuned white light in which the M / P ratio or color rendering index can be selected to a specific level to satisfy the optical characteristics of human-centered white light required according to specific situations. For example, when the sum of the intensities of the first and second white lights is 100, if the intensity of the first white light is 50 or higher, the M / P ratio of the tuned white light of the fourth embodiment can satisfy 2 or higher. Alternatively, when the sum of the intensities of the first and second white lights is 100, if the intensity of the first white light is less than 50, the color rendering index of the tuned white light of the fourth embodiment can satisfy 80 or higher.

[0159] The present invention is not limited by the embodiments described above and the attached drawings, but is intended to be limited by the appended claims. Accordingly, various substitutions, modifications, and changes may be made by those skilled in the art within the scope of the technical concept of the present invention as described in the claims, and such are also to be considered to fall within the scope of the present invention.

Claims

Claim 1 A first LED light source configured to emit a first white light having a first M / P ratio, comprising: a first light-emitting diode emitting a first blue light having a peak wavelength in the range of 435 nm to 465 nm; a second light-emitting diode emitting a second blue light having a peak wavelength in the range of 465 nm to 495 nm; a first wavelength conversion material excited by the first and second blue lights to emit a first light having a peak wavelength of 520 nm to 560 nm; and a second wavelength conversion material emitting a second light having a peak wavelength of 600 nm to 645 nm; and a third light-emitting diode emitting a third blue light having a peak wavelength in the range of 435 nm to 465 nm; a third wavelength conversion material excited by the third blue light to emit a third light having a peak wavelength in the range of 540 nm to 560 nm and a full width at half maximum of 60 nm or less; and a second wavelength conversion material excited by the third blue light having a peak wavelength in the range of 620 nm to 650 nm An LED lighting device comprising: a second LED light source configured to emit a second white light having a second M / P ratio, including a fourth wavelength conversion material that emits a fourth light having a wavelength; a tuning LED light source configured to emit a tuning blue light having a peak wavelength in the range of 465 nm to 495 nm; and a driving control unit that controls the current applied to the first LED light source, the second LED light source, and the tuning LED light source, respectively, to form a tuned white light having a third M / P ratio greater than the first M / P ratio and the second M / P ratio; wherein the tuned white light is a light in which the first white light, the second white light, and the tuning blue light are combined, the first M / P ratio is in the range of 0.65 to 1.2, the second M / P ratio is in the range of 0.5 to 0.62, and the third M / P ratio is 2 or more. Claim 2 delete Claim 3 delete Claim 4 An LED lighting device according to claim 1, wherein the driving control unit drives the first LED light source, the second LED light source, and the tuning LED light source to form the tuned white light, and in the spectrum of the tuned white light, the ratio (SB / B) of the peak intensity (SB) in the 465 nm to 495 nm band to the peak intensity (B) in the 435 nm to 465 nm band is in the range of 1 to 35, and the ratio (P / B) of the maximum peak intensity (P) in the 530 nm to 680 nm band to the peak intensity (B) in the 435 nm to 465 nm band is in the range of 0.5 to 9. Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 delete Claim 9 delete Claim 10 delete

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