connecting a modem to a TV - how to connect an internet modem to a TV

Hello

I would like to know if it is possible to connect the TV directly to the modem from the Internet ??
I ask because on the computer and on TV I use the same source of internet the difference is that I have a modem connected to the computer using an ethernet cable and on the TV using wi-fi.
In TV, the quality of the internet is much worse, the websites are hard to open, so I also wanted to connect the TV to the modem to download the internet from the cable. In the modem I have free ethernet inputs and tv hdmi and usb. I have not found a cable that has one usb and the other ethernet,
the only thing I managed to find is the following:
http://allegro.pl/adapter-przejsciowka-usb-c-na-ethernet-rj45-aukey-i6739190196.html

I do not know myself but it seems to me that it is only for use in a computer that does not have an ethernet input.

Does anyone know how to connect this modem ??

greetings

Please, complete the question about the TV type and router type, because not everyone has access to the "crystal ball".

Pozdr!

tv lg uf 7767, modem cisco epc3928 it seems to me that it has a built-in router because it has a button to turn on and off the wi-fi network

By. technical data this type of TV, in addition to the built-in wi-fi, also has an Ethernet connector. You can connect the TV directly to the router using the RJ45 RJ45 cable.

Pozdr!

Thanks for ans the cable you have provided has an Ethernet input on both sides (at least that's what I found) and I need one side of ethernet and the other usb or hdmi

I repeat, according to TV specifications have an ethernet input, so try to find them (it should be on the back of the TV, on the right side, somewhere in the recess with connectors). If it is, why combining with USB or HDMI ?!

my mistake is not on the right side but it is described in the back as lan thanks for the help