In recent years, Europe and America and other countries around the LED lighting industry have developed their own development plans, in order to seize the commanding heights of industry. China also has developed and launched the "863", green lighting, semiconductor lighting project, "Ten City, ten thousand," semiconductor lighting demonstration project and other measures to vigorously support the development of LED industry, China's LED industry has entered a rapid development period.
At present, China has initially formed, including the production of LED epitaxial wafers, LED chips preparation, LED chip, LED packaging, and product applications, including a relatively complete industrial chain, and in the downstream integration of applications with some advantages. LED number of employees up to 5 million people, more than 20 research institutions, more than 4,000 enterprises, of which more than 50 upstream companies, packaging companies hundred, more than 3,000 enterprises downstream applications. In 2009, the Chinese LED market was 21.48 billion yuan, up 15.9% over 2008, from the quantitative point of view, the Chinese LED market demand in 2009 was 50.05 billion, an increase of 16.7% over 2008.
Knowledge and performance testing product applications are as follows:
(1) soldering iron: iron (up to 30W) tip temperature does not exceed 300 ℃; welding time of less than 3 seconds; welding position at least 2 mm from the gel.
(2) Dip soldering: maximum temperature dip soldering 260 ℃; dip soldering time of less than 5 seconds; dip soldering position at least 2 mm from the gel.
Pin forming method:
(1) 2 mm from the gel necessary to bend bracket.
(2) Stent or fixture must be done by professionals.
(3) stent to be completed before the welding.
(4), stent placement and spacing of pins required to ensure consistency with the circuit board.
LED Installation
(1) Note that the arrangement of various types of external devices to prevent the polarity wrong. Not too close to the device and heating element, the working conditions should not exceed the prescribed limit.
(2) must not be the case of deformation in the pin installed LED.
(3) When the decision Kongzhong An installed, the calculation of good face and circuit board dimensions and tolerances so as not to pitch stand by excessive pressure.
(4) installation of LED, the construction of meaning with the guide sleeve position.
(5) in the welding temperature back to normal, it will have to avoid LED shock or by any external force.
Cleaning
When the chemicals must be particularly careful when cleaning gel, because some chemicals on the colloid surface damage and cause discoloration, such as TCE, acetone and so on. Available ethanol wipe, immersion time at room temperature does not exceed 3 minutes.
Working and storage temperature:
(1) LED LAMPS LED Topr-25 ℃ ~ 85 ℃, Tstg-40 ℃ ~ 100 ℃
(2) LED DISPLAYS display Topr-20 ℃ ~ 70 ℃, Tstg-20 ℃ ~ 85 ℃
(3) OUT-DOOR LED LAMPS pixel pipe Topr-20 ℃ ~ 60 ℃, Tstg-20 ℃ ~ 70 ℃
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