There are differences between outdoor display and indoor display. Outdoor environment is more complicated and harsher, which makes higher requirements on outdoor led display.
At first, under sunlight, Outdoor LED display needs to be bright enough to have a good visible display image. The gold wire bond’s conductivity is better than the copper wire bond’s. Generally speaking, the gold wire bond combined with bigger semiconductor cavity. Without considering other factors, the gold one lamp itself is brighter than the copper one. And the gold wire bond led lamp use big led chip, big led chip can present high brightness as well.
Secondly, temperature is higher outdoor than indoor. High temperature is not good for heating dissipation. Stents are the main parts of heat dissipation. The material of leg decide the ability of heat dissipation. The gold wire bond usually combined with copper leg, the copper leg are good at heat dissipation. So even at high temperature, the lamp can still work well. The copper wire bond often combined with iron leg, comparing with the copper one, they are not good enough for outdoor using.
Last but not least, high temperature would speed up the process of oxidization. The temperature in outdoor is higher than indoor, so the process of oxidization in outdoor would be faster than in indoor. The gold wire bond’s physical property is more stable than the copper wire bond’s. So even in outdoor, the gold wire bond can still work well. Instead, bad heat dissipation combined with high temperature would speed up the copper’s process of oxidization and shorten the copper wire bond’s service life.
For all above reasons, we proposed client to use gold wire lamp for outdoor led display if they have budget.