The aspect ratio for headrest monitor screens is the ratio between the width of the monitor and the height of the monitor. There are 2 main aspect ratios used for headrest DVD players.
The 4:3 aspect ratio means the headrest monitor screen is 4/3 or 1.33 x wider than its height. This is an older aspect ratio before high definition (HD) video. The screen appears to be nearly square as the height and width is only 33% wider.
The 16:9 aspect ration means the headrest monitor screen is 16/9 or 1.77 x wider than its height. This aspect ratio is also known as “wide screen” as the screen appears much wider 77% (nearly twice) than its height.
Headrest monitor screens come in many different shapes and sizes. It’s possible to have a headrest monitor screen be a different size than 1.33 and 1.77 and still have the capability to play 4:3 and 16:9 aspect ratio movies.
Most headrest DVD players will play both aspect ratios without any issues. However, if the screen size isn’t exactly the same ratio, the headrest screen will need to compensate for the difference by adding black bars on the side or top and bottom. This allows for the full image to be displayed without cutting off the top, bottom or side edges of the image and missing important parts of the movie.
The DVD you’re using will determine the aspect ratio of the movie. If the DVD is in 4:3 format it can only be played in 4:3 format. If it’s in 16:9 it can only be played in 16:9 format. Some DVD’s come with the ability to play in both formats or “Full Screen” mode where the movie will zoom to fit all 4 edges of the screen.
For more details about headrest monitor screen resolution, pixels, aspect ratios and more, go here>>>