The size of LCD refers to the diagonal distance of the screen. Internationally, 1 inch =2.54cm. Display generally refers to the diagonal size of the picture tube, which refers to the size of the picture tube, not its display area, but for the user, he is concerned about his visual area, that is, the actual size of the picture tube that can be seen, in inches.
Generally speaking, the visual area of a 15 inch display is 13.8 inch, that of a 17 inch display is 16 inch, and that of a 19 inch display is 18 inch.
Extended data
Disadvantages of display screen:
(1) The visual deflection angle is small;
(2) It is easy to cause image tailing (for example, the mouse pointer shakes rapidly). This is because ordinary LCD screens are mostly 60Hz (displaying 60 frames per second), but this problem mainly appears in games where LCD monitors have just become popular (that is, "picture tearing");
(The brightness and contrast of LCD are not very good;
(4) the "bad spot" problem of liquid crystal;
(5) Limited service life;
(6) When the resolution is lower than the default resolution of the display, the picture blur will be very obvious;
(7) When the resolution is greater than the default resolution of the display (mandatory setting by software is required), the colors in the details will be lost.