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    • 4. 发明授权
    • Light-emitting diode (LED) package and packaging method for shaping the external light intensity distribution
    • 发光二极管(LED)封装和封装方法,用于整形外部光强分布
    • US06674096B2
    • 2004-01-06
    • US09681806
    • 2001-06-08
    • Mathew L. Sommers
    • Mathew L. Sommers
    • H01L29227
    • H01L33/54H01L2924/1815
    • An LED package (10) includes LED die (12) mounted onto lead frame (14) and electrically connected thereto whereby LED die (12) is electrically energized through leads (16, 18). An encapsulant (20), preferably an epoxy resin, encapsulates and preferably hermetically seals LED die (12). Encapsulant (20) includes depression (24) defined by preselected curved surfaces (28), at least a portion of which are coated by reflective coating (26). Encapsulant (20) preferably also includes sides (22) with preselected curvature. In operation, LED die (12) emits light (32) directed approximately along LED die surface normal (36). Light rays (32) reflect from reflective surface (26) and reflected rays (38) are subsequently refracted by refracting surface (22) so that refracted rays (40) exit the capsule. The reflecting surface (26) and refracting surface (22) cooperate to convert LED die light distribution (32) into light distribution (40) which appears to emanate from an approximate point source (42).
    • LED封装(10)包括安装在引线框架(14)上并与其电连接的LED管芯(12),由此LED管芯(12)通过引线(16,18)供电。 密封剂(20),优选环氧树脂,封装并优选密封LED管芯(12)。 密封剂(20)包括由预选的曲面(28)限定的凹陷(24),其中至少一部分由反射涂层(26)涂覆。 密封剂(20)优选地还包括具有预选曲率的侧面(22)。 在操作中,LED管芯(12)发射大致沿着LED管芯表面法线(36)定向的光(32)。 光线(32)从反射表面(26)反射,然后由折射表面(22)折射反射光线(38),使得折射光线(40)离开胶囊。 反射表面(26)和折射表面(22)协调以将LED管芯光分布(32)转换成从近似点源(42)发出的光分布(40)。