That is kind of what I thought. Here is what I had found on the web that made me ask about it-
"new WS2821 IC in the 5050 RGB LED,it shall have following features:
1.WS2821’s data signals are in parallel connection,any LED failures won’t affect any other LEDs,whole effect won’t be effected at all.
2.WS2821’s protocol supply the DMX512 standard protocol,so it is compatible with the standard
DMX512 control panels,so all WS2821 series products can be controlled by the DMX control panels directly.
3.WS2821 has address storage function inside, once writing address,shall be permanent preserved.
Following diagram is our recommend application:
For the package,we have two different package types for reference:
1.Package type A:
2.Package type B:
For type A:Here are two shortcomings:
a).RGB chip is located in the side,not the center,so emitting color shall be at side as well.
b).Since it is not a customize frame,so for heat dissipation and steady shall checked by the market as well.
For type B:We plan to develop this new led frame as well,thus will guarantee the RGB chip existing in the center,heat dissipation being better!"