Actually, you *do* have it.
In more precise terms, the "pitch" is smaller. In common usage, "pixel" appears to mean both the glowing part that lights up in different colors and the non-glowing part (i.e. the space). Pitch includes the size of a lighted part of the pixel as well as the space next to it. So you can shrink the total screen size by removing some space between pixels (in which case the lighted part of the pixel is the same size), reducing the size of the lighted part, or some combination of both (including reducing both proportionally).
On projectors that project onto a screen, the space between pixels is often observed as the Screen Door Effect (SDE).
Generally, "pitch" is expressed as ""dots per inch" or "dpi".
This conversation all points to the fact that "resolution" as a description of number of pixels across and down on a screen is a kind of misnomer because if a 17 inch monitor and a 19 inch monitor that both have the same number of pixels, the 17 inch monitor has a higher "resolution" in the common english sense of the term (but not the "computer science" sense of the term).
I hope this helps!
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