This liquid crystal displays have hurt you

If I have a 19-inch widescreen liquid crystal display (Best Resolution 1440 * 900), 4:3 of the switch (or click the screen into a traditional 4:3 mode on both sides of the wide-screen is black.) So Go on display there for the long-term harm if I do
the resolution up to 800 * 600 display would have great impact on it.It harmful ????????

harmless all right, but as you do not feel uncomfortable watching it? It does not matter, which is host to the memory accounted for