CN110094641A - 一种白光led灯珠和灯条及灯具 - Google Patents
一种白光led灯珠和灯条及灯具 Download PDFInfo
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Abstract
本申请文件提供了一种白光LED灯珠和灯条及灯具。所述白光LED灯珠的相对光谱为Ф(λ),将对应色温的黑体辐射的相对光谱为S(λ),将Ф(λ)与S(λ)面积归一化,变换为白光LED灯珠的等能光谱Ф’(λ)和对应色温的黑体辐射的等能光谱S’(λ),则白光LED灯珠的等能光谱与黑体辐射的等能光谱的拟合度R满足以下公式:
Description
技术领域
本发明涉及发光装置技术领域,特别涉及一种能够发出与太阳光类似光谱的白光LED灯珠,以及应用该LED灯珠的灯条及灯具。
背景技术
随着人们对光品质要求的提升,越来越多的应用场合会对发光器件的光色提出更高要求。但目前市面上对于类太阳光的照明产品并没有统一的评价标准。部分号称类太阳光的产品为使其光谱能够整体尽可能贴近太阳光光谱,在440nm-460nm波长处会输出高强度的光谱能量,甚至会超出蓝光危害辐射曲线的范围;同时还在460nm-480nm波长具有明显的缺失,使光谱不连续。这些现有产品只能在500nm-620nm波长范围内与太阳光有较好的拟合度,所以实际上并不能成为“类太阳光”产品。
发明内容
本技术方案提供了一种白光LED灯珠,分析其光谱与太阳光光谱的具有较高的拟合度,在可见光范围内(430nm-650nm)保持90%以上的拟合度,避免出现蓝光刺眼的问题。
本发明是通过以下技术方案实现的。
一种白光LED灯珠,所述白光LED灯珠的相对光谱为Ф(λ),将对应色温的黑体辐射的相对光谱为S(λ),将Ф(λ)与S(λ)面积归一化,变换为白光LED灯珠的等能光谱Ф’(λ)和对应色温的黑体辐射的等能光谱S’(λ),则白光LED灯珠的等能光谱与黑体辐射的等能光谱的拟合度R满足以下公式:
其中:
S’(λ)=S(λ)/k1
Ф’(λ)=Ф(λ)/k2
当λi为380nm,λn为680nm,R≥85%。
进一步的,当λi为430nm,λn为650nm时,R≥90%,更优的情况为R≥95%。
进一步的,当λi为465nm,λn为495nm时,R≥80%。
进一步的,所述白光LED灯珠由发射主峰在380nm-430nm的芯片激发荧光粉发光。所述荧光粉存在由三种色粉组成的方案或四种色粉组成的方案。分别是由蓝粉(发射主峰在430nm-500nm,半峰宽20nm-100nm)、绿粉(发射主峰在480nm-550nm,半峰宽20nm-80nm)和红粉(发射主峰在600nm-700nm,半峰宽80nm-120nm)组成;或是由蓝粉(发射主峰在430nm-500nm,半峰宽20nm-100nm)、绿粉(发射主峰在480nm-550nm,半峰宽20nm-80nm)、黄粉(540nm-600nm,半峰宽60nm-120nm)以及红粉(发射主峰在600nm-700nm,半峰宽80nm-120nm)组成。其中,所述蓝粉为铝酸盐、氯磷酸盐或硅酸盐,具体包括BaMgAl10O17:Eu2+、BaAl12O9:Eu2+、Sr5(PO4)3Cl:Eu2+、Ba5(PO4)3Cl:Eu2+、RbNa3(Li3SiO4)4:Eu2+或MgSr3Si2O8:Eu2+;所述绿粉为氮氧化物、硅酸盐或铝酸盐,具体包括SiAlON:Eu2+、BaSiON2:Eu2+、Ba2SiO4:Eu2+或LuAG;所述黄粉为铝酸盐、硅酸盐或氮化物,具体包括Ga-YAG、Sr2SiO4:Eu2+、(BaSr)2SiO4:Eu2+或La3Si6N11:Ce3+;所述红粉为氮化物、硫化物或氟化物,具体包括CaAlSiN3:Eu2+、(Ca1- xSrx)AlSiN3:Eu2+、Ca2Si5N8:Eu2+、Sr2Si5N8:Eu2+、Ba2Si5N8:Eu2+、CaS:Eu2+或MgGeF6:Mn4+。
一种灯条,包括至少一个上述的白光LED灯珠,以及供白光LED灯珠安装固定的基板。
上述提供的白光LED灯珠或灯条可以安装于灯具的壳体内,并与其他必要的电路原件联接,组成灯具。
本技术方案提供了一种白光LED灯珠,其在可见光范围内(430nm-650nm)能够保持90%以上的拟合度,光谱波动幅度小,连续性优异,更为贴近太阳光,能够为用户提供良好的光照效果,使之在室内活动也能获得近似于在室外的观感。
附图说明
图1是实施例1所述白光LED灯珠的相对光谱与对应色温的黑体辐射的相对光谱的对比图;
图2是实施例5所述白光LED灯珠的相对光谱与对应色温的黑体辐射的相对光谱的对比图;
图3是实施例9所述白光LED灯珠的相对光谱与对应色温的黑体辐射的相对光谱的对比图。
具体实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明。但本领域技术人员将会理解,下列实施例仅用于说明本发明,而不应视为限定本发明的范围。实施例中未注明具体技术或条件者,按照本领域内的文献所描述的技术或条件或者按照产品说明书进行。所用试剂或仪器未注明生产厂商者,均为可以通过市购获得的常规产品。
本发明提供一种白光LED灯珠,所述白光LED灯珠的相对光谱为Ф(λ),将对应色温的黑体辐射的相对光谱为S(λ),将Ф(λ)与S(λ)面积归一化,变换为白光LED灯珠的等能光谱Ф’(λ)和对应色温的黑体辐射的等能光谱S’(λ),则白光LED灯珠的等能光谱与黑体辐射的等能光谱的拟合度R满足以下公式:
其中:
S’(λ)=S(λ)/k1
Ф’(λ)=Ф(λ)/k2
当λi为380nm,λn为680nm,R≥85%。
进一步的,当λi为430nm,λn为650nm时,R≥90%,更优的情况为R≥95%。
进一步的,当λi为465nm,λn为495nm时,R≥80%。
进一步的,所述白光LED灯珠由发射主峰在380nm-430nm的芯片激发荧光粉发光。所述荧光粉存在由三种色粉组成的方案或四种色粉组成的方案。分别是由蓝粉(发射主峰在430nm-500nm,半峰宽20nm-100nm)、绿粉(发射主峰在480nm-550nm,半峰宽20nm-80nm)和红粉(发射主峰在600nm-700nm,半峰宽80nm-120nm)组成;或是由蓝粉(发射主峰在430nm-500nm,半峰宽20nm-100nm)、绿粉(发射主峰在480nm-550nm,半峰宽20nm-80nm)、黄粉(发射主峰在540nm-600nm,半峰宽60nm-120nm)以及红粉(发射主峰在600nm-700nm,半峰宽80nm-120nm)组成。其中,所述蓝粉为铝酸盐、氯磷酸盐或硅酸盐,具体包括BaMgAl10O17:Eu2+、BaAl12O9:Eu2+、Sr5(PO4)3Cl:Eu2+、Ba5(PO4)3Cl:Eu2+、RbNa3(Li3SiO4)4:Eu2+或MgSr3Si2O8:Eu2+;所述绿粉为氮氧化物、硅酸盐或铝酸盐,具体包括SiAlON:Eu2+、BaSiON2:Eu2+、Ba2SiO4:Eu2+或LuAG;所述黄粉为铝酸盐、硅酸盐或氮化物,具体包括Ga-YAG、Sr2SiO4:Eu2+、(BaSr)2SiO4:Eu2+或La3Si6N11:Ce3+;所述红粉为氮化物、硫化物或氟化物,具体包括CaAlSiN3:Eu2+、(Ca1- xSrx)AlSiN3:Eu2+、Ca2Si5N8:Eu2+、Sr2Si5N8:Eu2+、Ba2Si5N8:Eu2+、CaS:Eu2+或MgGeF6:Mn4+。
一种灯条,包括至少一个上述的白光LED灯珠,以及供白光LED灯珠安装固定的基板。
上述提供的白光LED灯珠或灯条可以安装于灯具的壳体内,并与其他必要的电路原件联接,组成灯具。
实施例1~4
白光LED灯珠由紫光芯片激发荧光粉发光,所述荧光粉按质量份计,由55%~85%的BaMgAl10O17:Eu2+、2%~15%的SiAlON:Eu2+和10%~35%的(Ca1-xSrx)AlSiN3:Eu2+混合而成,具体配比如表1所示:
表1
荧光粉 | 组分 | 实施例1 | 实施例2 | 实施例3 | 实施例4 |
蓝粉 | BaMgAl<sub>10</sub>O<sub>17</sub>:Eu<sup>2+</sup> | 55% | 65% | 75% | 85% |
绿粉 | SiAlON:Eu<sup>2+</sup> | 10% | 5% | 15% | 2% |
红粉 | (Ca<sub>1-x</sub>Sr<sub>x</sub>)AlSiN<sub>3</sub>:Eu<sup>2+</sup> | 35% | 30% | 10% | 13% |
按实施例1所示配比制成白光LED灯珠,该白光LED灯珠的相对光谱Ф(λ)与对应色温的黑体辐射的相对光谱S(λ)的对比图如图1所示,白光LED灯珠在440nm-460nm波长处不再存在高强度的光谱能量,该处光谱峰仅略高于对应色温的黑体辐射的相对光谱。根据白光LED灯珠的等能光谱与黑体辐射的等能光谱的拟合度公式:
结合测量所得数据,当λi为380nm,λn为680nm时,R=87.9%;当λi为430nm,λn为650nm时,R=93.8%。同时,其465nm-495nm的特征区间(即λi为465nm,λn为495nm时)能换算得到R=86.5%,证明该白光LED灯珠在460nm-500nm波长的光谱较为连续,接近自然光的效果。
实施例2、实施例3、实施例4所示配比制成白光LED灯珠具有与实施例1相近似的光照效果。分别测量各实施例产品相对光谱Ф(λ),再结合拟合度公式,均满足产品要求:当λi为380nm,λn为680nm时,R≥85%;当λi为430nm,λn为650nm时,R≥90%;当λi为465nm,λn为495nm时,R≥80%。
实施例5~8
白光LED灯珠由紫光芯片激发荧光粉发光,所述荧光粉按质量份计,由55%~85%的M5(PO4)3Cl:Eu2+(M=Sr,Ba)、5%~20%的Ba2SiO4:Eu2+、2%~15%的Ga-YAG和2%~10%的M2Si5N8:Eu2+(M=Ca,Sr,Ba)混合而成,具体配比如表2所示:
表2
荧光粉 | 组分 | 实施例5 | 实施例6 | 实施例7 | 实施例8 |
蓝粉 | M<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>Cl:Eu<sup>2+</sup>(M=Sr,Ba) | 55% | 65% | 75% | 85% |
绿粉 | Ba<sub>2</sub>SiO<sub>4</sub>:Eu<sup>2+</sup> | 20% | 15% | 5% | 10% |
黄粉 | Ga-YAG | 15% | 12% | 10% | 2% |
红粉 | M<sub>2</sub>Si<sub>5</sub>N<sub>8</sub>:Eu<sup>2+</sup>(M=Ca,Sr,Ba) | 10% | 8% | 10% | 3% |
按实施例5所示配比制成白光LED灯珠,该白光LED灯珠的相对光谱Ф(λ)与对应色温的黑体辐射的相对光谱S(λ)的对比图如图2所示,白光LED灯珠在440nm-460nm波长处不再存在高强度的光谱能量,该处光谱峰仅略高于对应色温的黑体辐射的相对光谱;而白光LED灯珠在460nm-500nm波长的光谱也变得连续。根据白光LED灯珠的等能光谱与黑体辐射的等能光谱的拟合度公式:
结合测量所得数据,当λi为380nm,λn为680nm时,R=87.8%;当λi为430nm,λn为650nm时,R=93.8%。同时,其465nm-495nm的特征区间(即λi为465nm,λn为495nm时)能换算得到R=83.7%,证明该白光LED灯珠在460nm-500nm波长的光谱较为连续,接近自然光的效果。
实施例6、实施例7、实施例8所示配比制成白光LED灯珠具有与实施例5相近似的光照效果。分别测量各实施例产品相对光谱Ф(λ),再结合拟合度公式,均满足产品要求:当λi为380nm,λn为680nm时,R≥85%;当λi为430nm,λn为650nm时,R≥90%;当λi为465nm,λn为495nm时,R≥80%。
实施例9~12
白光LED灯珠由紫光芯片激发荧光粉发光,所述荧光粉按质量份计,由55%~70%的RbNa3(Li3SiO4)4:Eu2+、5%~20%的Ba2SiO4:Eu2+、2%~15%的La3Si6N11:Ce3+和2%~10%的CaS:Eu2+混合而成,具体配比如表3所示:
表3
荧光粉 | 组分 | 实施例9 | 实施例10 | 实施例11 | 实施例12 |
蓝粉 | RbNa<sub>3</sub>(Li<sub>3</sub>SiO<sub>4</sub>)<sub>4</sub>:Eu<sup>2+</sup> | 70% | 65% | 60% | 55% |
绿粉 | Ba<sub>2</sub>SiO<sub>4</sub>:Eu<sup>2+</sup> | 17% | 15% | 20% | 20% |
黄粉 | La<sub>3</sub>Si<sub>6</sub>N<sub>11</sub>:Ce<sup>3+</sup> | 5% | 15% | 10% | 15% |
红粉 | CaS:Eu<sup>2+</sup> | 8% | 5% | 10% | 10% |
按实施例9所示配比制成白光LED灯珠,该白光LED灯珠的相对光谱Ф(λ)与对应色温的黑体辐射的相对光谱S(λ)的对比图如图3所示,白光LED灯珠在440nm-460nm波长处不再存在高强度的光谱能量;而白光LED灯珠在460nm-500nm波长的光谱也变得连续;甚至在410nm-420nm处都不存在高强度的紫外光谱能量。根据白光LED灯珠的等能光谱与黑体辐射的等能光谱的拟合度公式:
结合测量所得数据,当λi为380nm,λn为680nm时,R=86.9%;当λi为430nm,λn为650nm时,R=95.0%。同时,其465nm-495nm的特征区间(即λi为465nm,λn为495nm时)能换算得到R=93.0%,证明该白光LED灯珠在460nm-500nm波长的光谱与自然光的光谱十分接近。
实施例10、实施例11、实施例12所示配比制成白光LED灯珠具有与实施例9相近似的光照效果。分别测量各实施例产品相对光谱Ф(λ),再结合拟合度公式,均满足产品要求:当λi为380nm,λn为680nm时,R≥85%;当λi为430nm,λn为650nm时,R≥90%;当λi为465nm,λn为495nm时,R≥80%。
Claims (14)
1.一种白光LED灯珠,其特征在于,所述白光LED灯珠的相对光谱为Φ(λ),将对应色温的黑体辐射的相对光谱为S(λ),将Φ(λ)与S(λ)面积归一化,变换为白光LED灯珠的等能光谱Φ’(λ)和对应色温的黑体辐射的等能光谱S’(λ),则白光LED灯珠的等能光谱与黑体辐射的等能光谱的拟合度R满足以下公式:
其中:
S’(λ)=S(λ)/k1
Φ’(λ)=Φ(λ)/k2
当λi为380nm,λn为680nm时,R≥85%。
2.根据权利要求1所述的白光LED灯珠,其特征在于,当λi为430nm,λn为650nm时,R≥90%。
3.根据权利要求2所述的白光LED灯珠,其特征在于,当λi为430nm,λn为650nm时,R≥95%。
4.根据权利要求1所述的白光LED灯珠,其特征在于,当λi为465nm,λn为495nm时,R≥80%。
5.根据权利要求1~4任一项所述的白光LED灯珠,其特征在于,所述白光LED灯珠由发射主峰在380nm-430nm的芯片激发荧光粉发光,所述荧光粉由发射主峰在430nm-500nm,半峰宽20nm-100nm的蓝粉,发射主峰在480nm-550nm,半峰宽20nm-80nm的绿粉,以及发射主峰在600nm-700nm,半峰宽80nm-120nm的红粉组成。
6.根据权利要求5所述的白光LED灯珠,其特征在于,所述蓝粉为铝酸盐、氯磷酸盐或硅酸盐;所述绿粉为氮氧化物、硅酸盐或铝酸盐;所述红粉为氮化物、硫化物或氟化物。
7.根据权利要求1~4任一项所述的白光LED灯珠,其特征在于,所述白光LED灯珠由发射主峰在380nm-430nm的芯片激发荧光粉发光,所述荧光粉由发射主峰在430nm-500nm,半峰宽20nm-100nm的蓝粉,发射主峰在480nm-550nm,半峰宽20nm-80nm的绿粉,发射主峰在540nm-600nm,半峰宽60nm-120nm的黄粉,以及发射主峰在600nm-700nm,半峰宽80nm-120nm的红粉组成。
8.根据权利要求7所述的白光LED灯珠,其特征在于,所述蓝粉为铝酸盐、氯磷酸盐或硅酸盐;所述绿粉为氮氧化物、硅酸盐或铝酸盐;所述黄粉为铝酸盐、硅酸盐或氮化物;所述红粉为氮化物、硫化物或氟化物。
9.根据权利要求6或8所述的白光LED灯珠,其特征在于,所述蓝粉为BaMgAl10O17:Eu2+、BaAl12O9:Eu2+、Sr5(PO4)3Cl:Eu2+、Ba5(PO4)3Cl:Eu2+、RbNa3(Li38iO4)4:Eu2+或MgSr3Si2O8:Eu2+。
10.根据权利要求6或8所述的白光LED灯珠,其特征在于,所述绿粉为SiAlON:Eu2+、BaSiON2:Eu2+、Ba2SiO4:Eu2+或LuAG。
11.根据权利要求8所述的白光LED灯珠,其特征在于,所述黄粉为Ga-YAG、Sr2SiO4:Eu2+、(BaSr)2SiO4:Eu2+或La3Si6N11:Ce3+。
12.根据权利要求6或8所述的白光LED灯珠,其特征在于,所述红粉为CaAlSiN3:Eu2+、(Ca1_xSrx)AlSiN3:Eu2+、Ca2Si5N8:Eu2+、Sr2Si5N8:Eu2+、Ba2Si5N8:Eu2+、CaS:Eu2+或MgGeF6:Mn4+。
13.一种灯条,包括基板,其特征在于:所述基板上设有至少一个如权利要求1所述的白光LED灯珠。
14.一种灯具,包括壳体,其特征在于:所述壳体内安装有如权利要求1所述的白光LED灯珠或如权利要求13所述的灯条。
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