Luminance
it is commonly referred to as “brightness”. Luminance is a major determinant of perceived picture quality in an LCD. Users are typically more drawn to brighter displays that are more pleasing to the eye and easier to read. In indoor environments, a standard TFT LCD with a screen luminance around 250 nits looks good.
Contrast ratio
Contrast is the ratio between the light intensity of the brightest and the darkest point of an image. High contrast values improve readability and ergonomics. A display should in all instances attain contrast values of 100:1. This is a point on which LCD monitors are clearly superior to monitors.
Viewing Angle
The viewing angle is the display's visible field. If one were to imagine a vertical line in the center of the image and to pivot up and down and to the right and to the left from that point.
