The Sharp LC-50LE771 has a maximum display resolution of Full HD. That's 75% less display resolution than the most frequently found HD type of 4K Ultra HD. Full HD TVs have a resolution of 1920 x 1080 pixels.
Full HD TVs have a resolution of 1920 x 1080 pixels.
TVs with a higher display resolution that might also be worth considering include the Philips 50PUT6400 (£399.00) (4K Ultra HD and higher rated).