发明名称 |
LED AND METHOD FOR ADJUSTING TRANSPARENT LENS ON THE SAME |
摘要 |
PURPOSE: A light emitting diode(LED) is provided to improve the light extraction efficiency of the light emitting device by reducing loss due to total internal reflection. CONSTITUTION: The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element having a refractive index for light emitted by the active region preferably greater than about 1.5, more preferably greater than about 1.8. A method of bonding a transparent optical element to a light emitting device comprising an active region includes elevating a temperature of the optical element and the stack and applying a pressure to press the optical element and the light emitting device together. A block of optical element material may be bonded to the light emitting device and then shaped into an optical element. Bonding a high refractive index optical element to a light emitting device improves the light extraction efficiency of the light emitting device by reducing loss due to total internal reflection. |
申请公布号 |
KR20020021014(A) |
申请公布日期 |
2002.03.18 |
申请号 |
KR20010055273 |
申请日期 |
2001.09.08 |
申请人 |
LUMILEDS LIGHTING US, LLC |
发明人 |
CAMRAS MICHAEL D.;KRAMES MICHAEL R.;LOWERY CHRISTOPHER H.;MUELLER GERD O.;MUELLER-MACH REGINA;POCIUS DOUGLAS W.;SNYDER WAYNE L.;STERANKA FRANK M.;TABER ROBERT C.;TROTTIER TROY A.;UEBBING JOHN J. |
分类号 |
G02B1/00;G02B3/00;G02B3/04;G02B3/08;H01L33/20;H01L33/50;H01L33/58 |
主分类号 |
G02B1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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