what is the pixel per inch in todays common laptop monitors?

Question

what is the pixel per inch in todays common laptop monitors? how can we find it in our system? does it affect the image quality display?

Answer 1

It highly depends because small laptops sometimes have very high resolution displays (e.g. 1920x1200 in 15.4" is not uncommon) and because there are big screen laptops with moderately low resolutions. You can usually find the DPI in some platform-specific manner, but AFAIK there is no cross-platform solution. You need to tell your target platform.

E.g. on Linux/Xorg you can get the relevant information by this command or the equivalent X11 programming API:

xdpyinfo|grep 'resolution\|dimensions'

The DPI does of course affect image quality, if the source material has sufficient resolution. However, the pixel dimensions of a display are more important as any DPI difference is quickly compensated by viewing from a different distance.

Answer 2

Common displays...is it not simply still 72?

Answer 3

2 factors affect image display, the image resolution itself and monitor resolution. Its very important for the image to have resolution.

IMO mostly Dell makes high resolution notebook monitors.

May be this pixel ruler will do some measurements of your monitor

http://www.mioplanet.com/products/pixelruler/index.htm

Answer 4

When talking about LCDs, Pixels Per Inch and Dots Per Inch are synonymous. This is the number of points of light (groups of RGB phosphors) representing a single pixel that fit in 1 physical inch. Some benefits of higher DPI screens include the ability to display higher screen resolutions in laptops and the ability to use more antialiasing for smoother text and graphics.

I have used a Panasonic CF-52, which has a native resolution of 1920x1200 and a physical screen size of 15.4". This corresponds to a DPI of 144. That's pretty high! The majority of modern LCDs are designed to have a DPI of 96.

If you are using Windows XP you can find out your display's DPI by right-clicking the desktop and selecting Properties. On the Settings tab click the Advanced button. Change the DPI setting field to Custom setting.

An on-screen ruler will come up. Using a physical ruler, adjust the percentage value until 1 inch on the on-screen ruler is the same as 1 inch on your physical ruler. Your DPI value will be displayed below the ruler.