CN112038465A - 一种去蓝光led芯片 - Google Patents
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Abstract
本发明提供了一种去蓝光LED芯片,包括UVLED芯片,该UVLED芯片的出光面均匀覆盖有一层去蓝光涂层,该去蓝光涂层包括环氧树脂、银胶、红色荧光粉、绿色荧光粉、蓝色荧光粉、纳米稀土氧化物。本发明提供的一种去蓝光LED芯片通过在UVLED芯片的出光面一侧喷涂由荧光粉和纳米稀土氧化物混合而成的去蓝光涂层,使发出的有害蓝光比例大大减小,有效避免蓝光导致的近视、白内障以及黄斑病变的眼睛病理危害和人体节律危害,并且增加无害蓝光比例,增加对压抑褪黑素分泌的作用,起到使人精神爽利的作用,同时光谱分布均匀,保证了出射照明光的均匀柔和,有效避免眩光,由本发明制成的光源特别适合用于替换教室中的荧光灯和普通LED灯,保护儿童视力。
Description
技术领域
本发明涉及照明技术领域,尤其是指一种去蓝光LED芯片。
背景技术
自然界本身是没有单独的白光,而是由蓝光与绿光、黄光混合后呈现出白光。绿光和黄光能量较小,对眼睛刺激较小;蓝光波短,能量高,更当其到达视网膜黄斑中心凹,黄斑里含的叶黄素会吸收适量的蓝光,而未被吸收的蓝光的射入会产生活性氧,过量的活性氧会氧化损伤视网膜色素上皮细胞,使视网膜色素上皮细胞无法正常向视觉细胞提供营养和代谢,导致视觉细胞营养供应不良,最终导致黄斑部主要的视觉细胞死亡,视觉细胞是不可再生的,这将大大影响视力健康。尤其是儿童人群,其视网膜黄斑对蓝光的吸收能力弱,使视网膜接收到的蓝光辐射是成年人的2倍左右,所以蓝光辐射对儿童视力健康影响最大,是最需要保护的群体。
蓝光中,并不是所有波长的蓝光都会对人眼造成伤害,如图1,波长为415-455nm的蓝光对视网膜色素上皮细胞的损害是波长480-500nm的2-4倍,属于有害蓝光,是特别需要去除的波长范围;而480-500nm波长范围的蓝光由于对视网膜色素上皮细胞的损害低、对压抑褪黑素分泌的作用大,反而起到使人精神爽利的作用,属于无害蓝光,是需要保留的波长范围。
日常学校和家庭中多使用荧光灯或LED灯作为光源供儿童学习,但是荧光灯和普通LED灯由于其发光原理,如图2和图3,其发出的光源通常在波长415-455nm的范围具有较高强度、而在波长480-500nm范围的强度较低,这不但使有害蓝光强度较高,对人眼造成伤害,而且反而无害蓝光强度较低,更增加了人眼的不适。
传统去蓝光光源是通过采用特殊的光源芯片封装材料和封装工艺实现去蓝光效果的,如CN201810417533.8公开的一种教室用护眼LED灯,包括灯罩、LED发光芯片、蓝光消减装置,通过棱镜的分光作用将不同波长的光投射到不同的位置,然后对蓝光以及与蓝光互补的黄光同时消减,这样既避免了蓝光伤害视力又能保持光源的色彩平衡保证光源的显色性。这种方式由于需要对LED芯片进行重新设计制造,使得灯具成本大大提高,不利于推广。
发明内容
(一)要解决的技术问题
本发明目的在于提供一种去蓝光LED芯片,具有去有害蓝光、留无害蓝光的功能,并且实现方式简单、制造成本低,易于推广。为实现上述之目的,本发明采取如下技术方案:
(二)技术方案
一种去蓝光LED芯片,包括UVLED芯片,所述UVLED芯片的出光面均匀覆盖有一层去蓝光涂层,该去蓝光涂层按质量百分比计算,包括35.83%-37.23%的环氧树脂、17.97%-18.75%的银胶、13.85%-14.91%的红色荧光粉、12.74%-13.56%的绿色荧光粉、5.88%-7.04%的蓝色荧光粉、8.51%-13.73%的纳米稀土氧化物。
进一步,所述UVLED芯片固定在EMC支架顶部,所述EMC支架固定在散热片顶部,所述UVLED芯片和EMC支架由环氧树脂层包裹,所述去蓝光涂层设于所述环氧树脂层顶面,该去蓝光涂层的厚度为0.1-0.15mm。
进一步,还包括EMC支架、基板、散热片,所述UVLED芯片固定在所述EMC支架顶部,所述基板固定在所述散热片顶部,所述基板上表面形成下凹的反光杯,所述EMC支架置于该反光杯内并固定在所述基板上,所述去蓝光涂层填满所述反光杯内并将所述UVLED芯片和EMC支架包裹,所述UVLED芯片顶面与所述去蓝光涂层的顶面之间的最小距离为0.1-0.15mm。
进一步,所述红色荧光粉为有研稀土新材料股份有限公司生产的GP-0763B型号荧光粉。
进一步,所述绿色荧光粉为有研稀土新材料股份有限公司生产的GP-2751型号荧光粉。
进一步,所述蓝色荧光粉为有研稀土新材料股份有限公司生产的GP-0730型号荧光粉。
进一步,所述纳米稀土氧化物为镧或钇的纳米氧化物。
(三)有益效果
本发明与现有技术相比具有明显的优点和有益效果,具体而言,通过添加合适比例的纳米稀土氧化物以及对各荧光粉进行配比形成去蓝光涂层,并将该去蓝光涂层在封装过程中喷涂至UVLED芯片的出光面,形成去蓝光LED芯片,大大降低封装难度,减少制造成本,使发出的有害蓝光比例大大减小,有效避免蓝光导致的近视、白内障以及黄斑病变的眼睛病理危害和人体节律危害,并且增加无害蓝光比例,增加对压抑褪黑素分泌的作用,起到使人精神爽利的作用,同时光谱分布均匀,保证了出射照明光的均匀柔和,有效避免眩光;本发明实现方式简单、制造成本低,易于推广,特别适合用于替换教室中的荧光灯和普通LED灯,保护儿童视力。
附图说明
下面参照附图结合实施例对本发明作进一步的描述。
图1是各波长的蓝光对视网膜色素上皮细胞损害值的柱状图;
图2是6500K色温下荧光灯的光谱图;
图3是6500K色温下普通LED灯的光谱图;
图4是实施例1的芯片结构示意图;
图5是实施例2和实施例3的芯片结构示意图;
图6是6500K色温下实施例1的光谱图;
图7是6500K色温下实施例2的光谱图;
图8是6500K色温下实施例3的光谱图。
附图标号说明:
1、UVLED芯片; | 2、EMC支架; |
3、散热片; | 4、环氧树脂层; |
5、去蓝光涂层; | 6、基板。 |
具体实施方式
下面详细描述本发明的实施例,所述实施例的示例在附图中示出,其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的,旨在用于解释本发明,而不能理解为对本发明的限制。
在本发明的描述中,需要理解的是,术语“长度”、“宽度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。
此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中,“多个”的含义是两个或两个以上,除非另有明确具体的限定。
在本发明中,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本发明中的具体含义。
下面结合附图与具体实施方式对本发明作进一步描述。
为实现最佳效果,各实施例中使用的红色荧光、粉绿色荧光粉、蓝色荧光粉均分别为有研稀土新材料股份有限公司生产的GP-0763B型号荧光粉、GP-2751型号荧光粉、GP-0730型号荧光粉,纳米稀土氧化物同样为有研稀土新材料股份有限公司生产的纳米稀土氧化物。
实施例1、
一种去蓝光LED芯片,包括UVLED芯片1、EMC支架2、散热片3,所述UVLED芯片1固定在EMC支架2顶部,所述EMC支架2固定在散热片3顶部,所述UVLED芯片1和EMC支架2由环氧树脂层4包裹,所述环氧树脂层4顶面设有一层厚度为0.13mm的去蓝光涂层5,其结构示意图如图4所示;其中去蓝光涂层5按质量百分比计算,包括37.23%的环氧树脂、18.75%的银胶、14.91%的红色荧光粉、13.56%的绿色荧光粉、7.04%的蓝色荧光粉、8.51%的纳米氧化镧(La2O3),用该LED芯片制造的LED灯的光谱图如图6。
实施例2、
一种去蓝光LED芯片,包括UVLED芯片1、EMC支架2、基板6、散热片3,所述UVLED芯片1固定在所述EMC支架2顶部,所述基板6固定在所述散热片3顶部,所述基板6上表面形成下凹的反光杯,所述EMC支架2置于该反光杯内并固定在所述基板6上,所述反光杯内填充有去蓝光涂层5,所述去蓝光涂层5将所述UVLED芯片1和EMC支架2包裹,所述UVLED芯片1顶面与所述去蓝光涂层5的顶面之间的最小距离为0.1mm,其结构示意图如图5所示;其中去蓝光涂层5按质量百分比计算,包括35.83%的环氧树脂、17.97%的银胶、13.85%的红色荧光粉、12.74%的绿色荧光粉、5.88%的蓝色荧光粉、13.73%的纳米氧化钇(Y2O3),用该LED芯片制造的LED灯的光谱图如图7。
实施例3、
一种去蓝光LED芯片,包括UVLED芯片1、EMC支架2、基板6、散热片3,所述UVLED芯片1固定在所述EMC支架2顶部,所述基板6固定在所述散热片3顶部,所述基板6上表面形成下凹的反光杯,所述EMC支架2置于该反光杯内并固定在所述基板6上,所述反光杯内填充有去蓝光涂层5,所述去蓝光涂层5将所述UVLED芯片1和EMC支架2包裹,所述UVLED芯片1顶面与所述去蓝光涂层5的顶面之间的最小距离为0.15mm,其结构示意图如图5所示;其中去蓝光涂层5按质量百分比计算,包括36.57%的环氧树脂、18.36%的银胶、14.38%的红色荧光粉、13.16%的绿色荧光粉、6.56%的蓝色荧光粉、10.98%的纳米氧化镧(La2O3),用该LED芯片制造的LED灯的光谱图如图8。
由上述三个实施例可知,本发明提供的一种去蓝光LED芯片通过在出光面一侧喷涂由荧光粉和纳米稀土氧化物混合而成的去蓝光涂层,使发出的有害蓝光比例大大减小,有效避免蓝光导致的近视、白内障以及黄斑病变的眼睛病理危害和人体节律危害,并且增加无害蓝光比例,增加对压抑褪黑素分泌的作用,起到使人精神爽利的作用,同时光谱分布均匀,保证了出射照明光的均匀柔和,有效避免眩光,由本发明制成的光源特别适合用于替换教室中的荧光灯,保护儿童视力。
以上所述,仅是本发明较佳实施例而已,并非对本发明的技术范围作任何限制,故凡是依据本发明的技术实质对以上实施例所作的任何细微修改、等同变化与修饰,均仍属于本发明技术方案的范围内。
Claims (7)
1.一种去蓝光LED芯片,包括UVLED芯片(1),其特征在于:所述UVLED芯片(1)的出光面均匀覆盖有一层去蓝光涂层(5),该去蓝光涂层(5)按质量百分比计算,包括35.83%-37.23%的环氧树脂、17.97%-18.75%的银胶、13.85%-14.91%的红色荧光粉、12.74%-13.56%的绿色荧光粉、5.88%-7.04%的蓝色荧光粉、8.51%-13.73%的纳米稀土氧化物。
2.根据权利要求1所述一种去蓝光LED芯片,其特征在于:所述UVLED芯片(1)固定在EMC支架(2)顶部,所述EMC支架(2)固定在散热片(3)顶部,所述UVLED芯片(1)和EMC支架(2)由环氧树脂层(4)包裹,所述去蓝光涂层(5)设于所述环氧树脂层(4)顶面,该去蓝光涂层(5)的厚度为0.1-0.15mm。
3.根据权利要求1所述一种去蓝光LED芯片,其特征在于:还包括EMC支架(2)、基板(6)、散热片(3),所述UVLED芯片(1)固定在所述EMC支架(2)顶部,所述基板(6)固定在所述散热片(3)顶部,所述基板(6)上表面形成下凹的反光杯,所述EMC支架(2)置于该反光杯内并固定在所述基板(6)上,所述去蓝光涂层(5)填满所述反光杯内并将所述UVLED芯片(1)和EMC支架(2)包裹,所述UVLED芯片(1)顶面与所述去蓝光涂层(5)的顶面之间的最小距离为0.1-0.15mm。
4.根据权利要求1所述一种去蓝光LED芯片,其特征在于:所述红色荧光粉为有研稀土新材料股份有限公司生产的GP-0763B型号荧光粉。
5.根据权利要求1所述一种去蓝光LED芯片,其特征在于:所述绿色荧光粉为有研稀土新材料股份有限公司生产的GP-2751型号荧光粉。
6.根据权利要求1所述一种去蓝光LED芯片,其特征在于:所述蓝色荧光粉为有研稀土新材料股份有限公司生产的GP-0730型号荧光粉。
7.根据权利要求1所述一种去蓝光LED芯片,其特征在于:所述纳米稀土氧化物为镧或钇的纳米氧化物。
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