CN101521253B - 固态发光元件及光源模组 - Google Patents

固态发光元件及光源模组 Download PDF

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CN101521253B
CN101521253B CN2008103004314A CN200810300431A CN101521253B CN 101521253 B CN101521253 B CN 101521253B CN 2008103004314 A CN2008103004314 A CN 2008103004314A CN 200810300431 A CN200810300431 A CN 200810300431A CN 101521253 B CN101521253 B CN 101521253B
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light emitting
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徐弘光
王君伟
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Foxsemicon Integrated Technology Shanghai Inc
Foxsemicon Integrated Technology Inc
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Abstract

本发明涉及一种具良好散热性能的固态发光元件，其包括一个基板及一个固态发光芯片，该基板具有一第一表面及一与其相对的第二表面，该固态发光芯片设置在该第一表面上且其具有一个第一电极及一个第二电极。该固态发光元件还包括一个第一导电体及一个第二导电体，该第一导电体设置在该基板的邻近该第二表面的一侧并与该固态发光芯片的第一电极电连接，该第二导电体贯穿设置在该第一导电体中且与其相互绝缘，该第二导电体与该固态发光芯片的第二电极电连接。固态发光芯片发光时所发出得热量可经由该第一导电体、第二导电体扩散至该固态发光元件之外，有效地提高了该固态发光元件的散热效率。

Description

固态发光元件及光源模组 
技术领域
本发明涉及一种固态发光元件及一种具有多个该固态发光元件的光源模组。 
背景技术
发光二极管(Light Emitting Diode，LED)作为一种固态发光元件，其电、光特性及寿命对温度敏感，在此，一种在温度变化过程中还能保持稳定光强的新型发光二极管可参见YukioTanaka等人在文献IEEE Transactions On Electron Devices，Vol.41，No.7，July 1994中的A Novel Temperature-StableLight-Emitting Diode一文。一般而言，较高的温度会导致低落的内部量子效应并且寿命也会明显缩短；另一方面，半导体的电阻随着温度的升高而降低，滑落的电阻会带来较大的电流及更多的热产生，造成热累积现象的发生；此一热破坏循环往往会加速破坏发光二极管的工作效能。 
如图1所示，一种典型的固态发光元件100包括：一个基座101，一个第一电极102，一个第二电极103，一个发光二极管芯片104及一个封装体105。该第一电极102和第二电极103并列设置于该基座101上，该发光二极管芯片104设置在该第一电极102上且与该第一电极102及第二电极103打线连接。该封装体105设置在该基座101上用于封装该发光二极管芯片104。该发光二极管芯片104发光时所产生的热量大部分经由该封装体105及第一电极102散出，但是该封装体105的导热性能不佳，尤其是该第一电极102的散热效率不高，导致该发光二极管芯片104所产生的热量不能及时散出，致使该固态发光元件100的散热性能不佳。因此，有必要提供一种散热性能良好的固态发光元件和光源模组。 
发明内容
下面将以实施例说明一种具有良好散热性能的固态发光元件和光源模组。 
一种固态发光元件，包括一个基板及一个固态发光芯片，该基板具有一第一表面及一与其相对的第二表面，该固态发光芯片设置在该第一表面上且其具有一个第一电极及一个第二电极。该固态发光元件还包括一个第一导电体及一个第二导电体，该第一导电体设置在该基板的邻近该第二表面的一侧并与该固态发光芯片的第一电极电连接，该第二导电体贯穿设置在该第一导电体中且与其相互绝缘，该第二导电体与该固态发光芯片的第二电极电连接，该基板具有一个第一通孔及一个第二通孔，该第一通孔与该第二通孔贯穿该基板的第一表面及第二表面，该固态发光芯片的第一电极与第二电极位于该固态发光芯片的相对的两侧，该固态发光元件还包括一个第一金属线，该第一金属线的一端连接于该固态发光芯片的第一电极，该第一金属线的另一端穿过该第一通孔连接于该第一导电体，该第二导电体的一端穿过该基板的第二通孔与该固态发光芯片的第二电极形成电连接。 
一种光源模组，包括一个散热板及至少一个固态发光元件，该固态发光元件包括一个基板，一个固态发光芯片，一个第一导电体及一个第二导电体，该基板具有一第一表面及一与其相对的第二表面，该固态发光芯片设置在该基板的第一表面上且其具有一个第一电极及一个第二电极，该第一导电体设置在该基板的邻近该第二表面的一侧并与该固态发光芯片的第一电极电连接，该第二导电体贯穿设置在该第一导电体中且与其相互绝缘，该第二导电体与该固态发光芯片的第二电极电连接，该散热板包括两相对的第三表面与第四表面，以及位于该第三表面与第四表面之间的侧面，该散热板设置有至少一个贯穿该散热板的第三表面及第四表面的第三通孔，该至少一个固态发光元件的第一导电体固持在该至少一个第三通孔中。 
相对于现有技术，所述固态发光元件及光源模组均包括一个第一导电体及一个第二导电体，第一导电体、第二导电体分别与固态发光芯片的第一电极、第二电极电连接，固态发光芯片发光时所发出得热量可经由该第一导电体、第二导电体扩散至该固态发光元件之外，或进一步经由散热板扩散至外部空气，有效地提高了该固态发光元件或光源模组的散热效率。 
附图说明
图1是现有技术中的一种固态发光元件的截面示意图。 
图2是本发明第一实施例的固态发光元件的截面示意图。 
图3是本发明第二实施例的固态发光元件的截面示意图。 
图4是本发明第三实施例的光源模组的局部截面示意图。 
图5是图4所示光源模组的局部俯视示意图。 
具体实施方式
下面将结合附图对本发明实施例作进一步的详细说明。 
参见图2，本发明第一实施例提供的具良好散热性能的固态发光元件10，其包括：一个基板11、一个固态发光芯片12、一个导电柱13，一个导电棒14及一个封装体15。 
基板11包括一个第一表面110，一个与第一表面110相对的第二表面112。基板11具有一个第一通孔113及一个第二通孔115，第一通孔113与第二通孔115贯穿基板11的第一表面110及第二表面112。基板11的形状可为四边形、五角形、六角形等多边形。基板11可为玻璃纤维或陶瓷等电绝缘导热材料制成的绝缘基板，也可为铜、铝等金属制成的金属基板。在本实施例中，基板11为陶瓷制成的绝缘基板。 
固态发光芯片12设置在基板11的第一表面110上，封装体15设置在基板11的第一表面110上用以覆盖固态发光芯片12。 
导电柱13设置在基板11的邻近该第二表面112的一侧，导电棒14贯穿设置在导电柱13中。导电柱13的一端与基板11的第二表面112紧密接触。在本实施例中，固态发光芯片12为 发光二极管芯片，其具有一个顶部电极121及一个底部电极122，顶部电极121与底部电极122设置在该固态发光芯片12的相对的两侧，顶部电极121通过一金属线16与导电柱13形成电连接，在此，金属线16的一端连接于顶部电极121，其另一端穿过第一通孔113连接于导电柱13。底部电极122与导电棒14形成电连接，在此，固态发光芯片12设置在第二通孔115的上方，导电棒14的一端穿过基板11的第二通孔115以与底部电极122形成电连接。 
导电柱13及导电棒14分别与外部电源(图未示)形成电连接。导电柱13与导电棒14之间相互绝缘，例如：二者之间经由空气或绝缘层相互隔离。在本实施例中，导电柱13与导电棒14之间设置有一个绝缘层17，导电棒14的远离固态发光芯片12的一端延伸至导电柱13之外。另外，绝缘层17套设在导电棒14上，绝缘层17的一端也穿过基板11的第二通孔115并与固态发光芯片12的底部电极122相连，从而使得导电棒14与基板11电隔离。导电柱13的外表面设置有外螺纹(OuterThreads)132，从而便于固态发光元件10与其它装置通过螺纹啮合连接在一起。值得注意的是，若基板11为金属基板，则固态发光芯片12的底部电极122与基板11的第一表面110之间也需要设置绝缘层(图未示)，使固态发光芯片12与基板11电绝缘。 
当固态发光芯片12处于导通状态时，其发出的热量可通过基板11及导电柱13向远离固态发光芯片12的方向扩散，从而有效地提高了固态发光元件10的散热效率。 
参见图3，本发明第二实施例提供的固态发光元件20，其与上述第一实施例所提供的固态发光元件10基本相同，不同之处在于： 
固态发光芯片22的正极221与负极222并行设置在该固态发光芯片22的一侧； 
导电柱23具有一凸起231，凸起231伸入基板21的第一通孔213并延伸至基板21的第一表面210，固态发光芯片22的正 极221通过金属线26与凸起231形成电连接； 
导电棒24设置在固态发光芯片22的下方，且固态发光芯片22仅覆盖导电棒24的部分端面，固态发光芯片22的负极222通过金属线27与导电棒24的未被固态发光芯片22覆盖的端面电连接。 
在本实施例中，导电柱23及导电棒24分别与外部电源(图未示)形成电连接。当固态发光芯片22处于导通状态时，其发出的热量可通过基板21、导电柱23及导电棒24向远离固态发光芯片22的方向扩散，从而有效地提高了固态发光元件20的散热效率。 
参见图4，本发明第三实施例提供的光源模组30，其包括一个散热板31，多个固态发光元件32，一层内绝缘膜33，一层导电膜34，一层外绝缘膜35及一个散热鳍片36。 
散热板31具有一个第三表面310，一个与第三表面310相对的第四表面311及位于第三表面310与第四表面311之间的侧面312。散热板31设置有多个并行的第三通孔313。多个第三通孔313分别贯穿散热板31的第三表面310及第四表面311，第三通孔313的内壁设置有与导电柱323的外螺纹332相啮合的内螺纹3130。多个第三通孔313与多个固态发光元件32分别对应，即该多个固态发光元件32的导电柱323可分别固持在该多个第三通孔313中并形成电连接。 
固态发光元件32可为上述第一实施例所提供的固态发光元件10，也可为上述第二实施例所提供的固态发光元件20。 
内绝缘膜33，导电膜34及外绝缘膜35依次设置在散热板31的第四表面311一侧。内绝缘膜33与散热板31的第四表面311相邻，内绝缘膜33设置有多个第四通孔331。多个第四通孔331分别与多个第三通孔313相对应且与第三通孔313相连通。 
固态发光元件32的导电棒324的远离基板321的一端穿过第四通孔331与导电膜34电连接。 
可以理解的是，外绝缘膜35不仅可以设置在导电膜34的远离内绝缘膜33的一侧，也可设置在散热板31的侧面312上。 
散热鳍片36设置在导电膜34的远离内绝缘膜33的一侧且与外绝缘膜35相连。 
在本实施例中，散热板31及导电膜34分别与外部电源(图未示)形成电连接，从而对分别设置在多个第三通孔313中的多个固态发光元件32提供电能。当固态发光元件32的固态发光芯片322处于导通状态时，其发出的热量可通过基板321、导电柱323扩散至散热板31，由于散热板31与空气具有较大的接触面积从而有利于散热板31中的热量扩散至外部空气，有效地提高了光源模组30的散热效率。散热板31中的部分热量向远离固态发光芯片322的方向扩散，从而进一步提高了光源模组30的散热效率。 
请参见图5，该多个固态发光元件32的基板321的形状为四边形、五角形、六角形，有助于利用扳手(Screw Driver)对固态发光元件32的基板321施加扭力，以将固态发光元件32的导电柱323旋入散热板31的第三通孔313使该固态发光元件32导电柱323与散热板31的第三通孔313螺纹啮合。可以理解的是，该多个固态发光元件32的基板321的形状也可为椭圆形，具有凸起结构的圆形等，只要有助于利用扳手对其施加扭力即可。 
另外，本领域技术人员还可于本发明精神内做其它变化，只要其不偏离本发明的技术效果均可。这些依据本发明精神所做的变化，都应包含在本发明所要求保护的范围之内。 

Claims (8)

1.一种固态发光元件，包括一个基板及一个固态发光芯片，该基板具有一第一表面及一与其相对的第二表面，该固态发光芯片设置在该第一表面上且其具有一个第一电极及一个第二电极，其特征在于，该固态发光元件还包括一个第一导电体及一个第二导电体，该第一导电体设置在该基板的邻近该第二表面的一侧并与该固态发光芯片的第一电极电连接，该第二导电体贯穿设置在该第一导电体中且与其相互绝缘，该第二导电体与该固态发光芯片的第二电极电连接，该基板具有一个第一通孔及一个第二通孔，该第一通孔与该第二通孔贯穿该基板的第一表面及第二表面，该固态发光芯片的第一电极与第二电极位于该固态发光芯片的相对的两侧，该固态发光元件还包括一个第一金属线，该第一金属线的一端连接于该固态发光芯片的第一电极，该第一金属线的另一端穿过该第一通孔连接于该第一导电体，该第二导电体的一端穿过该基板的第二通孔与该固态发光芯片的第二电极形成电连接。
2.如权利要求1所述的固态发光元件，其特征在于，该第一导电体与该第二导电体之间通过一绝缘层相互绝缘。
3.如权利要求1所述的固态发光元件，其特征在于，该第一导电体的外表面设置有外螺纹。
4.如权利要求1所述的固态发光元件，其特征在于，该基板的形状为多边形。
5.一种光源模组，包括一个散热板及至少一个固态发光元件，该固态发光元件包括一个基板，一个固态发光芯片，一个第一导电体及一个第二导电体，该基板具有一第一表面及一与其相对的第二表面，该固态发光芯片设置在该基板的第一表面上且其具有一个第一电极及一个第二电极，该第一导电体设置在该基板的邻近该第二表面的一侧并与该固态发光芯片的第一电极电连接，该第二导电体贯穿设置在该第一导电体中且与其相互绝缘，该第二导 电体与该固态发光芯片的第二电极电连接，该散热板包括两相对的第三表面与第四表面，以及位于该第三表面与第四表面之间的侧面，该散热板设置有至少一个贯穿该散热板的第三表面及第四表面的第三通孔，该至少一个固态发光元件的第一导电体固持在该至少一个第三通孔中。
6.如权利要求5所述的光源模组，其特征在于，该至少一个固态发光元件的第一导电体与该至少一个第三通孔螺纹啮合。
7.如权利要求5所述的光源模组，其特征在于，该光源模组进一步包括依次设置在该散热板的第四表面一侧的一层内绝缘膜，一层导电膜及一层外绝缘膜，该内绝缘膜与该散热板的第四表面相邻设置，该导电膜与该固态发光元件的第二导电体电连接。
8.如权利要求7所述的光源模组，其特征在于，该光源模组进一步包括一个散热鳍片，该散热鳍片与该外绝缘膜相邻设置。 
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