JP2018156956A5 - - Google Patents

Description

In addition, the fluorescent substance represented by following General formula (10) and the fluorescent substance represented by following General formula (11) are also mentioned.
_{(La 1-x- y E u} x L n y) 2 O 2 S (10)
(In the general formula (10), x and y each represent a number satisfying 0.02 ≦ x ≦ 0.50 and 0 ≦ y ≦ 0.50, and Ln represents Y, Gd, Lu, Sc, Sm and Er At least one trivalent rare earth element is represented. (The lanthanum oxysulfide phosphor represented by the general formula (10) is referred to as LOS phosphor.)
(K−x) MgO · x AF ₂ · GeO ₂ : y Mn ⁴⁺ (11)
(In the general formula (11), k, x and y each represent a number satisfying 2.8 ≦ k ≦ 5, 0.1 ≦ x ≦ 0.7, and 0.005 ≦ y ≦ 0.015, A is calcium (Ca), strontium (Sr), barium (Ba), zinc (Zn), or a mixture thereof) (a germanate phosphor represented by the general formula (11)) and an MGOF phosphor Call.)

Claims (35)

A light emitting device comprising a light emitting element and a control element, comprising:
At least, it has a blue semiconductor light emitting element as a light emitting element,
Let the wavelength be λ (nm),
The spectral distribution of light emitted from the light emitting element in the main radiation direction is _{要素 elm} (λ), and the spectral distribution of light emitted from the light emitting device in the main radiation direction is φ _SSL (λ)
[Phi _elm light having a (lambda) is the following condition I, conditions II, does not satisfy at least one of the conditions IV, phi _SSL light having a (lambda) is the following condition I, conditions II, to satisfy all the conditions IV Characteristic light emitting device.
Condition I:
The CIE 1976 L ^* a ^* b ^* color space a ^* and b ^* values in the following 15 types of modified Munsell color charts from # 01 to # 15 when the illumination by the target light is mathematically assumed: a ^* _N , b ^* _n (where n is a natural number from 1 to 15),
CIE 1976 L ^* a ^* b ^* color of said 15 types of modified Munsell color charts when it is mathematically assumed that the illumination with the reference light selected according to the correlated color temperature T (K) of the object light _Assuming that the a ^* value and the b ^* value in the space are a ^* _nref and b ^* _nref (where n is a natural number from 1 to 15), the saturation difference ΔC _n is
−4.00 ≦ ΔC _n ≦ 8.00 (n is a natural number of 1 to 15)
It is.
Condition II:
The average of the degree of saturation difference in the target light represented by the following formula (3) is

It is .
However, the _{^{ΔC n = √ {(a *}} n) 2 + (b * n) 2} -√ {(a * nref) 2 + (b * nref) 2}.
15 types of modified Munsell color charts # 01 7.5 P 4/10
# 02 10 PB 4/10
# 03 5 PB 4/12
# 04 7.5 B 5/10
# 05 10 BG 6/8
# 06 2.5 BG 6/10
# 07 2.5 G 6/12
# 08 7.5 GY 7/10
# 09 2.5 GY 8/10
# 10 5 Y 8.5 / 12
# 11 10 YR 7/12
# 12 5 YR 7/12
# 13 10 R 6/12
# 14 5 R 4/14
# 15 7.5 RP 4/12
Condition IV:
The hue angle in the CIE 1976 L ^* a ^* b ^* color space of the 15 types of the modified Munsell color chip when the illumination by the target light is mathematically assumed is θ _n (degree) (where n is 1 to 15) Natural numbers),
The hue in the CIE 1976 L ^* a ^* b ^* color space of the above 15 types of modified Munsell color charts when it is mathematically assumed that the illumination with the reference light selected according to the correlated color temperature T of the target light _Assuming that the angle is θ _nref (degree) (where n is a natural number from 1 to 15), the absolute value of the hue angle difference | Δh _n |
0.00 degree ≦ | Δh _n | ≦ 12.50 degree (n is a natural number of 1 to 15)
It is.
However, it is set as _{( DELTA) hn} = (theta) _{n- (} theta _{) nref} .   A light emitting device comprising a light emitting element and a control element, comprising:
  At least a blue semiconductor light emitting element as a light emitting element;
  Let the wavelength be λ (nm),
  The spectral distribution of light emitted from the light emitting element in the main radiation direction is Φ _elm (Λ), the spectral distribution of light emitted from the light emitting device in the main radiation direction _SSL (Λ),
  Φ _elm The light having (λ) satisfies all of the following conditions I, II and IV, and φ _SSL A light emitting device characterized in that light having (λ) also satisfies all of the following conditions I, II and IV.
Condition I:
  CIE 1976 L of the following 15 types of modified Munsell color charts of # 01 to # 15 when the illumination by the target light is mathematically assumed ^* a ^* b ^* A in color space ^* Value b ^* Each value a ^* _n , B ^* _n (Where n is a natural number of 1 to 15),
  CIE 1976 L of the above 15 modified Munsell color charts when it is assumed mathematically that the illumination with the reference light selected according to the correlated color temperature T (K) of the light of interest ^* a ^* b ^* A in color space ^* Value b ^* Each value a ^* _nref , B ^* _nref (Where n is a natural number of 1 to 15), the saturation difference ΔC _n But,
  −4.00 ≦ ΔC _n ≦ 8.00 (n is a natural number of 1 to 15)
It is.
Condition II:
  The average of the degree of saturation difference in the target light represented by the following formula (3) is

It is.
  However, ΔC _n = {{(A ^* _n ) ² + (B ^* _n ) ² } -√ {(a ^* _nref ) ² + (B ^* _nref ) ² } And
  15 types of modified Munsell color votes
  # 01 7.5 P 4/10
  # 02 10 PB 4/10
  # 03 5 PB 4/12
  # 04 7.5 B 5/10
  # 05 10 BG 6/8
  # 06 2.5 BG 6/10
  # 07 2.5 G 6/12
  # 08 7.5 GY 7/10
  # 09 2.5 GY 8/10
  # 10 5 Y 8.5 / 12
  # 11 10 YR 7/12
  # 12 5 YR 7/12
  # 13 10 R 6/12
  # 14 5 R 4/14
  # 15 7.5 RP 4/12
Condition IV:
  CIE 1976 L of the 15 modified Munsell color charts given mathematically assuming illumination by the light of interest ^* a ^* b ^* The hue angle θ in color space _n (Degree) (where n is a natural number from 1 to 15),
  CIE 1976 L of the 15 modified Munsell color charts when mathematically assuming illumination with a reference light selected according to the correlated color temperature T of the light of interest ^* a ^* b ^* The hue angle θ in color space _nref (Degree) (where n is a natural number of 1 to 15), the absolute value of the hue angle difference | _n But
  0.00 degree ≦ | Δ h _n ≦ 12.50 degrees (n is a natural number from 1 to 15)
It is.
  However, Δh _n = Θ _n −θ _nref I assume.   A light emitting device according to claim 1 or 2, wherein
  Φ _elm The light having (λ) does not satisfy the following condition 1 and φ _SSL A light emitting device characterized in that light having (λ) satisfies condition 1 below.
Condition 1:
  The spectral distribution of the light of interest is φ (λ), and the spectral distribution of reference light selected according to the correlated color temperature T of the light of interest is φ _ref (Λ),
  The tristimulus values of the target light (X, Y, Z),
  The tristimulus value of the reference light selected according to the correlated color temperature T (X _ref , Y _ref , Z _ref )age,
  The normalized spectral distribution S (λ) of the target light and the normalized spectral distribution S of the reference light of the target light _ref (Λ) and the difference ΔS (λ) of these normalized spectral distributions are
  S (λ) = φ (λ) / Y
  S _ref (Λ) = φ _ref (Λ) / Y _ref
  ΔS (λ) = S _ref (Λ) -S (λ)
Defined as
  In the wavelength range of 380 nm to 780 nm, the wavelength giving the longest wavelength maximum value of S (λ) is λ _RL-max (Λ) where λ _RL-max S (λ _RL-max If there is a wavelength Λ4 of
  Index A represented by the following formula (1) _cg But,
  -10.0 <A _cg   ≦ 120.0
And
  On the other hand, in the wavelength range of 380 nm to 780 nm, the wavelength giving the longest wavelength maximum value of S (λ) is λ _RL-max (Λ) where λ _RL-max S (λ _RL-max In the case where there is no wavelength Λ4 that is
  Index A represented by the following formula (2) _cg But,
  -10.0 <A _cg   ≦ 120.0
It is.

  A light emitting device according to claim 1 or 2, wherein
  Φ _elm The light having (λ) satisfies the following condition 1 and φ _SSL A light emitting device characterized in that the light having (λ) also satisfies the following condition 1.
Condition 1:
  The spectral distribution of the light of interest is φ (λ), and the spectral distribution of reference light selected according to the correlated color temperature T of the light of interest is φ _ref (Λ),
  The tristimulus values of the target light (X, Y, Z),
  The tristimulus value of the reference light selected according to the correlated color temperature T (X _ref , Y _ref , Z _ref )age,
  The normalized spectral distribution S (λ) of the target light and the normalized spectral distribution S of the reference light of the target light _ref (Λ) and the difference ΔS (λ) of these normalized spectral distributions are
  S (λ) = φ (λ) / Y
  S _ref (Λ) = φ _ref (Λ) / Y _ref
  ΔS (λ) = S _ref (Λ) -S (λ)
Defined as
  In the wavelength range of 380 nm to 780 nm, the wavelength giving the longest wavelength maximum value of S (λ) is λ _RL-max (Λ) where λ _RL-max S (λ _RL-max If there is a wavelength Λ4 of
  Index A represented by the following formula (1) _cg But,
  -10.0 <A _cg   ≦ 120.0
And
  On the other hand, in the wavelength range of 380 nm to 780 nm, the wavelength giving the longest wavelength maximum value of S (λ) is λ _RL-max (Λ) where λ _RL-max S (λ _RL-max In the case where there is no wavelength Λ4 that is
  Index A represented by the following formula (2) _cg But,
  -10.0 <A _cg   ≦ 120.0
It is.

  It is a light-emitting device of any one of Claims 1-4, Comprising:
  Φ _elm The light having (λ) does not satisfy the following condition 2 and φ _SSL A light emitting device characterized in that light having (λ) satisfies condition 2 below.
Condition 2:
  The spectral distribution φ (λ) of the light of interest is the distance D from the black body radiation trajectory defined by ANSI C 78.377. _uv But,
  −0.0220 ≦ D _uv   <0
It is.   It is a light-emitting device of any one of Claims 1-4, Comprising:
  Φ _elm The light having (λ) satisfies the following condition 2 and φ _SSL A light emitting device characterized in that the light having (λ) also satisfies the following condition 2.
Condition 2:
  The spectral distribution φ (λ) of the light of interest is the distance D from the black body radiation trajectory defined by ANSI C 78.377. _uv But,
  −0.0220 ≦ D _uv   <0
It is.   The light emitting device according to any one of claims 1 to 6, wherein
  Φ _elm The light having (λ) does not satisfy the following condition 3 and φ _SSL A light emitting device characterized in that light having (λ) satisfies condition 3 below.
Condition 3:
  The spectral distribution φ (λ) of the light of interest is the maximum value of the spectral intensity in the range of 430 nm to 495 nm. _BM-max , The minimum value of the spectral intensity in the range of 465 nm or more and 525 nm or less _BG-min When you define
  0.2250 φ φ _BG-min / Φ _BM-max   ≦ 0.7000
It is.   The light emitting device according to any one of claims 1 to 6, wherein
  Φ _elm The light having (λ) satisfies the following condition 3 and φ _SSL A light emitting device characterized in that the light having (λ) also satisfies the following condition 3.
Condition 3:
  The spectral distribution φ (λ) of the light of interest is the maximum value of the spectral intensity in the range of 430 nm to 495 nm. _BM-max , The minimum value of the spectral intensity in the range of 465 nm or more and 525 nm or less _BG-min When you define
  0.2250 φ φ _BG-min / Φ _BM-max   ≦ 0.7000
It is.   The light emitting device according to any one of claims 1 to 8, wherein
  Φ _elm The light having (λ) does not satisfy the following condition 4 and φ _SSL A light emitting device characterized in that light having (λ) satisfies condition 4 below.
Condition 4:
  The spectral distribution φ (λ) of the light of interest is the maximum value of the spectral intensity in the range of 590 nm to 780 nm. _RM-max When defined as _RM-max Wavelength λ giving _RM-max But,
  605 (nm) ≦ λ _RM-max   ≦ 653 (nm)
It is.   The light emitting device according to any one of claims 1 to 8, wherein
  Φ _elm The light having (λ) satisfies the following condition 4 and φ _SSL A light emitting device characterized in that the light having (λ) also satisfies the following condition 4.
Condition 4:
  The spectral distribution φ (λ) of the light of interest is the maximum value of the spectral intensity in the range of 590 nm to 780 nm. _RM-max When defined as _RM-max Wavelength λ giving _RM-max But,
  605 (nm) ≦ λ _RM-max   ≦ 653 (nm)
It is.   A light emitting device according to any one of claims 1 to 10, wherein
  Φ _elm The light having (λ) does not satisfy the following condition 5 and φ _SSL A light emitting device characterized in that light having (λ) satisfies condition 5 below.
Condition 5:
  In the spectral distribution φ (λ) of the light of interest, _BM-max Wavelength λ giving _BM-max But,
  430 (nm) ≦ λ _BM-max   ≦ 480 (nm)
It is.   A light emitting device according to any one of claims 1 to 10, wherein
  Φ _elm The light having (λ) satisfies the following condition 5 and φ _SSL A light emitting device characterized in that the light having (λ) also satisfies the following condition 5:
Condition 5:
  In the spectral distribution φ (λ) of the light of interest, _BM-max Wavelength λ giving _BM-max But,
  430 (nm) ≦ λ _BM-max   ≦ 480 (nm)
It is.   The light emitting device according to any one of claims 1 to 12, wherein
  The average of the saturation differences derived from the spectral distribution of light emitted from the light emitting element in the main radiation direction is SAT _ave (Φ _elm ),
  The average of the saturation differences derived from the spectral distribution of light emitted from the light emitting device in the main radiation direction is SAT _ave (Φ _SSL When defined as)
  SAT _ave (Φ _elm ) <SAT _ave (Φ _SSL )
A light emitting device characterized in that   The light emitting device according to any one of claims 5 to 13, wherein
  D derived from the spectral distribution of light emitted from the light emitting element in the main radiation direction _uv D _uv (Φ _elm ),
  D derived from the spectral distribution of light emitted from the light emitting device in the main radiation direction _uv D _uv (Φ _SSL When defined as)
  D _uv (Φ _SSL ) <D _uv (Φ _elm )
A light emitting device characterized in that   The light emitting device according to any one of claims 3 to 14, wherein
  A derived from the spectral distribution of light emitted from the light emitting element in the main radiation direction _cg A _cg (Φ _elm ),
  A derived from the spectral distribution of light emitted from the light emitting device in the main radiation direction _cg A _cg (Φ _SSL When defined as)
  A _cg (Φ _SSL ) <A _cg (Φ _elm )
A light emitting device characterized in that   The light emitting device according to any one of claims 1 to 15, wherein
  A light-emitting device characterized in that the control element is an optical filter that absorbs or reflects light of 380 nm ≦ λ (nm) ≦ 780 nm.   The light emitting device according to any one of claims 1 to 16, wherein
  A light emitting device characterized in that the control element also has a function of condensing and / or diffusing light emitted from the light emitting element.   The light emitting device according to claim 17, wherein
  A light-emitting device, wherein the condensing and / or diffusing function of the control element is realized by at least one function of a concave lens, a convex lens, and a Fresnel lens.   The light emitting device according to any one of claims 1 to 18, wherein
  The light emitted from the light emitting device in the radiation direction illuminates an object at an illuminance of 5 lx or more and 10000 lx or less.   The light emitting device according to any one of claims 1 to 19, wherein
  Φ _elm The light having (λ) does not satisfy the following condition 6 and φ _SSL A light emitting device characterized in that light having (λ) satisfies condition 6 below.
Condition 6:
  The spectral distribution φ (λ) of the light of interest is
  0.1800 φ φ _BG-min / Φ _RM-max   ≦ 0.8500
It is.   The light emitting device according to any one of claims 1 to 20, wherein
  Φ _elm The light having (λ) does not satisfy the following condition 7 and φ _SSL A light emitting device characterized in that light having (λ) satisfies condition 7 below.
Condition 7:
  The radiation efficiency K (lm / W) in the wavelength range of 380 nm or more and 780 nm or less derived from the spectral distribution φ (λ) of the target light
  210.0 lm / W ≦ K ≦ 290.0 lm / W
It is.   22. A light emitting device according to any one of the preceding claims,
  Φ _elm The light having (λ) does not satisfy the following condition 8 and φ _SSL A light having (λ) satisfies the following condition 8;
Condition 8:
  The correlated color temperature T (K) of the light of interest
  2600 K ≦ T ≦ 7700 K
It is.   21. A light emitting device according to claim 20, wherein
  Φ _elm The light having (λ) satisfies at least one of the following condition 5, condition 7, and condition 8, and φ _SSL The light having (λ) has the above Φ among conditions 5, 7 and 8 below. _elm What is claimed is: 1. A light emitting device characterized by satisfying at least one of the conditions under which light having (λ) is not satisfied.
Condition 5:
  In the spectral distribution φ (λ) of the light of interest, _BM-max Wavelength λ giving _BM-max But,
  430 (nm) ≦ λ _BM-max   ≦ 480 (nm)
It is.
Condition 7:
  The radiation efficiency K (lm / W) in the wavelength range of 380 nm or more and 780 nm or less derived from the spectral distribution φ (λ) of the target light
  210.0 lm / W ≦ K ≦ 290.0 lm / W
It is.
Condition 8:
  The correlated color temperature T (K) of the light of interest
  2600 K ≦ T ≦ 7700 K
It is.   22. A light emitting device according to claim 21, wherein
  Φ _elm The light having (λ) satisfies at least one of the following condition 5, condition 6, and condition 8, and φ _SSL The light having (λ) has the above-mentioned の う ち among the following condition 5, condition 6, and condition 8 _elm What is claimed is: 1. A light emitting device characterized by satisfying at least one of the conditions under which light having (λ) is not satisfied.
Condition 5:
  In the spectral distribution φ (λ) of the light of interest, _BM-max Wavelength λ giving _BM-max But,
  430 (nm) ≦ λ _BM-max   ≦ 480 (nm)
It is.
Condition 6:
  The spectral distribution φ (λ) of the light of interest is
  0.1800 φ φ _BG-min / Φ _RM-max   ≦ 0.8500
It is.
Condition 8:
  The correlated color temperature T (K) of the light of interest
  2600 K ≦ T ≦ 7700 K
It is.   23. A light emitting device according to claim 22, wherein
  Φ _elm The light having (λ) satisfies at least one of the following conditions 5 to 7, and φ _SSL The light having (λ) has the above Φ among conditions 5 to 7 below. _elm What is claimed is: 1. A light emitting device characterized by satisfying at least one of the conditions under which light having (λ) is not satisfied.
Condition 5:
  In the spectral distribution φ (λ) of the light of interest, _BM-max Wavelength λ giving _BM-max But,
  430 (nm) ≦ λ _BM-max   ≦ 480 (nm)
It is.
Condition 6:
  The spectral distribution φ (λ) of the light of interest is
  0.1800 φ φ _BG-min / Φ _RM-max   ≦ 0.8500
It is.
Condition 7:
  The radiation efficiency K (lm / W) in the wavelength range of 380 nm or more and 780 nm or less derived from the spectral distribution φ (λ) of the target light
  210.0 lm / W ≦ K ≦ 290.0 lm / W
It is.   The light emitting device according to any one of claims 1 to 19, wherein
  Φ _elm The light having (λ) satisfies all of the following conditions 5 to 8 and φ _SSL A light emitting device characterized in that light having (λ) also satisfies all of the following conditions 5 to 8:
Condition 5:
  In the spectral distribution φ (λ) of the light of interest, _BM-max Wavelength λ giving _BM-max But,
  430 (nm) ≦ λ _BM-max   ≦ 480 (nm)
It is.
Condition 6:
  The spectral distribution φ (λ) of the light of interest is
  0.1800 φ φ _BG-min / Φ _RM-max   ≦ 0.8500
It is.
Condition 7:
  The radiation efficiency K (lm / W) in the wavelength range of 380 nm or more and 780 nm or less derived from the spectral distribution φ (λ) of the target light
  210.0 lm / W ≦ K ≦ 290.0 lm / W
It is.
Condition 8:
  The correlated color temperature T (K) of the light of interest
  2600 K ≦ T ≦ 7700 K
It is.   27. A light emitting device according to any one of the preceding claims, wherein
  A light emitting device further comprising a green phosphor as the light emitting element.   28. A light emitting device according to any one of the preceding claims, wherein
  A light emitting device further comprising a red phosphor as the light emitting element.   A light emitting device according to claim 27 or 28, wherein
  The green phosphor has a wavelength λ giving a maximum emission intensity at the time of light excitation of the green phosphor alone. _PHOS-GM-max Is at least 511 nm and at most 543 nm,
  The full width half maximum W _PHOS-GM-fwhm Is 90 nm or more and 110 nm or less.   A light emitting device according to claim 28 or 29, wherein
  The red phosphor has a wavelength λ that gives the maximum emission intensity at the time of light excitation of the red phosphor alone. _PHOS-RM-max Is 622 nm or more and 663 nm or less,
  The full width half maximum W _PHOS-RM-fwhm Is 80 nm or more and 105 nm or less.   31. A light emitting device according to any one of claims 27 to 30, wherein
  The green phosphor is Ca ₃ (Sc, Mg) ₂ Si ₃ O ₁₂ : Ce (CSMS phosphor), CaSc ₂ O ₄ : Ce (CSO phosphor), Lu ₃ Al ₅ O ₁₂ : Ce (LuAG phosphor) or Y ₃ (Al, Ga) ₅ O ₁₂ : A light emitting device characterized by being Ce (G-YAG phosphor).   32. A light emitting device according to any one of claims 28 to 31, wherein
  The red phosphor is (Sr, Ca) AlSiN ₃ : Eu (SCASN phosphor), (CaAlSiN ₃ ) _1-x (Si ₂ N ₂ O) _x : Eu (where x is 0 <x <0.5) (CASON phosphor) or CaAlSiN ₃ : A light emitting device including Eu (CASN phosphor).   33. A light emitting device according to any one of claims 28 to 32, wherein
  The blue semiconductor light emitting device has a dominant wavelength λ during pulse driving of the single blue semiconductor light emitting device. _CHIP-BM-dom An AlInGaN-based light emitting device having a wavelength of 452.5 nm to 470 nm,
  The green phosphor has a wavelength λ giving a maximum emission intensity at the time of light excitation of the green phosphor alone. _PHOS-GM-max Is 515 nm to 535 nm, and its full width at half maximum W _PHOS-GM-fwhm Is from 90 nm to 110 nm, CaSc ₂ O ₄ : Ce (CSO phosphor) or Lu ₃ Al ₅ O ₁₂ : Ce (LuAG phosphor),
  The red phosphor has a light emission intensity maximum value λ at the time of light excitation of the red phosphor alone. _PHOS-RM-max To give a wavelength of 640 nm or more and 663 nm or less, and its full width at half maximum W _PHOS-RM-fwhm Is not less than 80 nm and not more than 105 nm, (CaAlSiN ₃ ) _1-x (Si ₂ N ₂ O) _x : Eu (where x is 0 <x <0.5) (CASON phosphor) or CaAlSiN ₃ : Eu (CASN phosphor)
A light emitting device characterized by   34. A light emitting device according to any one of claims 27 to 33, wherein
  The light emitting device, wherein the green phosphor is a narrow band green phosphor.   A light emitting device according to any one of claims 1 to 34, wherein the light emitting device is a packaged LED, a chip on board type LED, an LED module, an LED bulb, an LED lighting fixture, or an LED lighting system. .