3-in-1 full-color LED for outdoor display

October 25, 2019

[Source: "High-tech LED - Technology and Applications" February issue Li Xing]

First, the status of outdoor display:

The outdoor display market is currently dominated by the following two types of LEDs: the 346 series and the 546 series. However, the overall display still does not achieve high definition and better visual effects. The difference in light and electrical characteristics between LEDs usually causes the brightness and chromaticity of the LED display to be inconsistent, which in turn destroys the white balance of the display and reduces the display quality. In severe cases, it also causes problems such as flower screen and mosaic.

Second, a three-in-one full-color LED product design suitable for outdoor display:

In view of the above problems in the outdoor display market, a three-in-one full-color LED structure suitable for outdoor display is specially designed, which has high brightness, high contrast and advanced structure. as the picture shows:


1. One of the goals of this product design

Due to the reasonable lead frame design, the high-temperature injection molding process makes the LED itself have excellent sealing performance, preventing the wafer and gold wire from being affected by external temperature and moisture, that is, good temperature and moisture resistance.

The stent structure comprises an injection molded inner package housing as a diffuse reflection layer and encapsulates a silica gel therein. It achieves three effects: First, it makes it harder for external temperature and moisture to reach the core and gold wires of the LED. Second, to prevent the destruction of the package itself by ultraviolet rays; thirdly, due to the diffuse reflection characteristics of the casing, the RGB three colors can be mixed to achieve uniformity of light emission, and the RGB three-color light mixing is better for white, provided by the display. High white purity.

2. The purpose of this product design is two

Forming a lens structure on the encapsulant allows the wafer to emit more brightness and change the shape of the lens to meet the requirements of the display screen for the exit angle. The different exit angles required to reach the display can also be evaluated by simulation software.


For more information, please refer to the February issue of "High-tech LED-Technology and Applications" magazine.

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