It is for a device that you connect to your Tv that only has a Hdmi output.
So you can at least get a picture and audio from for example a free view tv box or any other device.
And you are mistaken, bellow is the model of Lcd Philips television you have Jarnaul.
It list the screen size and all of the display mode the Tv can display just to clear thing up for you.
So it looks like you will be able to buy a Roku box and it should run fine on the set you have.
Click on the link bellow to see the specification and display modes the 32PFL3506/F7 set can display.
I hope it helped anyway
http
/www.usa.philips.com/c-p/32PFL3506_F7/81cm-32-inch-digital-tv/specifications