由于纯度的提高,在相同面积不变的情况下的工作效率提高了。
为了延长使用寿命减少发热故将XR-E的芯片面积减少了30%。限定最大电流为700mA。
但是光通量不变,仍然为(350mA下107流明)发光角度由原来的90度变为100度,从而减少光杯的深度和直径。这样设计反而提高了聚光的效率。即减少了原材料的使用又降低了成本和乐而不为呢。
CREE下一步就要推广XP-E了。价格会更低的。
技术是在进步的!期待更优秀的产品。(:smile:) 楼上的狂烧兄解释的真详细,小弟佩服。
学习了。 也就是说耐电流能力降低了?
回复 63楼 2009 的帖子
别费劲了creexr封装led的英文变更书在我这里大家看看好啦 仅仅是缩小了核心面积最大通过电流还是1000毫安Product Change Notification
CLD-PC06 Subject: Visual Appearance of XLamp XR-E Cool White LEDs Date: January 9, 2009
This notification applies to the following Cree XLamp order codes:
XREWHT-xx-xxxx-xxxxx
No customer action is required.
Change Description
Cree will begin shipment of XLamp XR-E LEDs with different visual appearances. An example of an XLamp XR-E LED with different visual appearance is shown in the pictures below. These visually different XLamp XR-E LEDs meet the product specifications, reliability and lifetime projections stated on the XLamp XR-E data sheet.
Current Appearance Impact of Change
New Appearance
Beginning January 16, 2009, Cree may begin shipments of XLamp XR-E cool white LEDs with different visual appearances. Each reel of XLamp XR-E LEDs will only contain LEDs with similar visual appearance. No customer action is required.
Subject to change without notice. www.cree.com/xlamp
1 多谢XXC兄了,学习了 09怎么总在学习 要不断的学习,才能积累知识啊。 最好能同时减少偏心 偏心一直是个大问题,要是能改进那就再好不过了!!