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2. 发明公开

EP0938834A1 LAMP 无效
标题翻译：灯
公开(公告)号：EP0938834A1
公开(公告)日：1999-09-01
申请号：EP97912314.0
申请日：1997-11-11
申请人： L.F.D. Limited
发明人： FLECK, Leonard
IPC分类号： H01L33 , B64D47 , F21H5 , F21K99 , H05B33
CPC分类号： H05B33/0815 , B64D47/06 , B64D2203/00 , F21K9/23 , F21Y2115/10 , H05B33/0803 , H05B33/0812 , Y02B20/341 , Y02B20/343
摘要： A LED lamp has a tubular metal body 1 having bayonet fitting lugs 2 and a central insulated contact 3 at its base. The top 4 of the body is angled and has a small metal plate 5 set in potting compound 6 arranged flush with the angled top 4. The plate 5 has two arrays 7,8 of LEDs mounted on it. The LEDs are protected by a layer of transparent encapsulant 9. The LEDs 7 are visible light LEDs, and up to two hundred of them are arranged in a series/parallel array 70. The LEDs 8 are infra-red LEDs, with four arranged in a series parallel array 80. The cathodes 71 of the LEDs 7 on the cathode side of the array 70 and the anodes 82 of the LEDs 8 on the anode side of the array 80 are commonly connected via leads 11 to the body 1. The anodes 72 on the anode side of the array 70 are connected via a current limiting resistor 12 to the central contact 3. Similarly the cathodes 81 on the cathode side of the array 80 are connected via a reverse voltage limiting diode 13 and a current limiting resistor 14 to the central contact 3. When the central contact has a positive voltage applied to it of say 28 volts, the VL LEDs 7 are excited, and emit light; whilst the IR LEDs 8 are not excited. When the polarity is reversed, the IR LEDs are excited and emit IR light and the VL LEDs are not excited.
摘要翻译： LED灯具有在其基部具有卡口配合凸耳（2）和中央绝缘触点（3）的管状金属体（1）。主体的顶部（4）成角度并且具有设置在与倾斜顶部（4）齐平的浇注材料（6）中的小金属板（5）。板（5）具有安装在其上的两个LED阵列（7,8）。它们由一层透明密封剂（9）保护。 LED（7）是可见光LED，并且其中多达两百个以串联/并联阵列（70）布置。 LED（8）是红外LED，其中四个排列成串并联阵列（80）。阵列（70）的阴极侧上的LED（7）的阴极（71）和阵列（80）的阳极侧上的LED（8）的阳极（82）通常经由引线）到身体（1）。阵列（70）的阳极侧上的阳极（72）经由限流电阻器（12）连接到中央触点（3）。类似地，阵列（80）的阴极侧上的阴极（81）经由反向电压限制二极管（13）和限流电阻器（14）连接到中央触点（3）。当中心触点施加正电压，例如28伏时，VL LED（7）被激励并发光; 而IR LED（8）未被激励。当极性反转时，IR LED被激励并发出IR光，VL LED不被激励。

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