LED發光二極管。.:

1.Storage＆Precautions 倉儲和使用注意事項：

Because SMD LED is a humidity sensitive element, it is easy to absorb water vapor in the air. When LED absorbs moisture, when the reflux welding is high temperature, the expansion of water vapor will cause stress, which will cause glue crack, delamination damage internal structure, and lead to LED failure. So please do the following work：

因SMD LED屬于濕敏元件，易吸收空氣中的水汽，LED吸潮后，在過回流焊高溫時，因水蒸汽膨脹產生應力，會造成膠裂、分層損壞內部結構，導致LED失效，所以請按以下幾點作業：

1.1During handling and storage, appropriate protection should be made to avoid LED moisture absorption caused by aluminum foil bag breakage.

搬運、儲存過程中應做好相應的防護，避免鋁箔袋破損導致LED吸潮

1.2.Please store and use 60%RH at 30 ℃ and humidity.

請在溫度≦30℃，濕度≦60%RH的條件下存儲和使用

1.3 . The packing bag is damaged and leaking or the production date is more than 2 months. It is forbidden to use. Please return it to us for high temperature dehumidification

包裝袋破損漏氣或生產日期超過2個月，禁止使用，請退回我司高溫除濕

1.4 . The production date is within 2 months, the product packing bag does not have the broken air leakage, opens the packing bag to read the humidity card immediately, the humidity card 20% does not become pink, may use directly, if becomes pink forbids use, needs to return our division high temperature dehumidification.

生產日期在2個月之內，產品包裝袋無破損漏氣，拆開包裝袋立即閱讀濕度卡，濕度卡20%處未變成粉紅色，可直接使用，如果變成粉紅色禁止使用,需退回我司高溫除濕

1.5 . The welding of LED patch should be completed within 0.5 H to avoid the potential danger of LED absorbing the water in tin paste

  LED貼片后應在0.5H之內完成焊接，避免LED吸收錫膏內的水份造成不良隱患

　1.6. Please use up the product after unsealing in 2H, not run out can not continue to use, in unseal 4H can use 70 ℃ ±5 ℃ low temperature dehumidification 12H after use, more than 4H has serious hygroscopic, need to return to our company high temperature dehumidification

 拆封后的產品請在2H內用完，未用完不能繼續使用，在拆封4H內的可以用70℃±5℃低溫除濕12H后使用，超過4H的已嚴重吸潮，需退回我司高溫除濕

2、ESD (Electrostatic Discharge) 靜電防護

2.1  LED is very sensitive to ESD; please make sure during the whole usage and installation process, that no ESD exist to affect the LED. Excessive ESD could damage t

LED發光二極管。.:

浪涌脈沖也可能導致LED 損壞，請確認驅動LED電路和設備是否有超載保護。

2.3  During the installation process, please make sure all the equipment and personnel are grounded properly. Make use ESD protection equipment such as anti-static gloves, anti-static wrist bands, anti-static mats, anti-static clothes, anti-static shoes, and anti-static containers.

加工裝配期間，請確認所有的設備和人員是否有有效的接地連接，并有靜電防護措施，比如人員

佩戴防靜電手套、防靜電手環、穿戴防靜電服，防靜電鞋 ，以及使用防靜電轉料箱等…

3、Design Consideration 設計建議 ：

In designing a circuit, the current through each LED must not exceed the absolute maximun rating specified for each LED. In the meanwhile, resistors for protection should be applied, otherwise slight voltage shift will cause big current change, burn out may happen.

It is recommended to use Circuit A which regulates the current flowing through each LED rather than Circuit B. When driving LEDs with a constant voltage in Circuit B, the current through the LEDs may vary due to the variation  in Forward Voltage (VF) of the LEDs. In the worst case, some LED may be subjected to stresses in excess of the Absolute Maximum Rating.

設計電路時，通過 LED 的電流不能超過規定的最大值，同時，還需使用保護電阻，否則，微小的電壓變化將會引起較大的電流變化，可能導致產品損毀。

建議使用以下（A）電路，該電路能夠很好的調節通過每個 LED 的電流；不推薦使用（B）電路，該電路在持續的電壓驅動下，LED 的正向電壓（VF）發生變化，電流會隨之而發生變化，可能使某些 LED 承受高于規定的電流值。

Thermal Design is paramount importance because heat generation may result in the Characteristics decline, such as brightness dcreased, Color changed and so on. Please consider the heat genertion of the LEDs when making the  system design.

  LED 的特性容易因為自身的發熱和環境的溫度的改變而發生改變。溫度的升高會降低 LED 的發光效率、影響發光顏色等，所以在設計時應充分考慮散熱的問題。