Four Seas Oasis Indoor True Color LED display is the basic principle of light at each pixel point package of pure red, pure green, blue chip, driven by the drive system of its light.

四海绿洲LED室内真彩色显示屏的基本原理是在每个像素发光点封装纯红、纯绿、纯蓝晶片，由驱动系统驱动其发光。

youdao

And display the CARDS to the audience after they answer your question, and four card's back are all turn into different color.

并且显示卡片对观众在他们回答您的问题之后，并且四张卡片的后面是所有轮入另外颜色。

youdao