LG TVs have LED screens and sold in the US market have several series. 4,5,6,7,8,9 series. 4 and 5, a series of the most basic functions of TV sets with minimal and mainly with HD resolution screen and no access to the internet, only 5 series models 5800 and 5900 have a LAN port.
6 and 7 Series TVs with Full HD and are the most practical, 7 series has 3D.
8 and 9 series TVs with 4K of the models have 3D. Camera for Skype in all models have the option, probably why the manufacturer believes her presence on TV is not mandatory.
Below is a comparison chart of LG TVs on the market in the US.
Also, it can be viewed in PDF (see).