To understand why we need high resolution or high definition (HD) movie to play and match with our 40 inch LCD TV, I will define the resolution first. Resolution measure by width X height.
Resolution is the term used to describe the number of dots, or pixels, used to display an image. Higher resolutions mean that more pixels are used to create the image, resulting in a crisper, cleaner image.
The display, or resolution on a monitor, is composed of thousands of pixels or dots. This display is indicated by a number combination, such as 800 x 600. This indicates that there are 800 dots horizontally across the monitor, by 600 lines of dots vertically, equaling 480,000 dots that make up the image you see on the screen.
Choose the high resolution movie to play perfectly match with your 40 inc LCD TV.