Runco Q-750D operation manual 1.Estimating Throw Distance, Ambient Light

Installation

Ambient Light ➤	In general, minimize or eliminate light sources directed at the screen. Contrast ratio in your
	images will be noticeably reduced if light directly strikes the screen, such as when a shaft
	of light from a window or floodlight falls on the image. Images may then appear washed
	out and less vibrant.
Throw Distance ➤	Throw distance is the distance measured from the front of the projector to the screen.
	This is an important calculation in any projector installation as it determines whether or not
	you have enough room to install your projector with a desired screen size and if your
	image will be the right size for your screen.
	You can quickly estimate the throw distance by taking the width of the screen and
	multiplying it by the lens throw ratio; see Figure 3-1.The result of this calculation tells you
	roughly how far back the projector should be positioned from the screen in order to
	project a focused image large enough to fill the screen.

Estimating Throw Distance

Throw Distance (TD) = Screen Width (w) x Lens Throw Ratio

Screen	width
		(w)

TD

Figure 3-1. Estimating Throw Distance

16 Q-750d Series Installation/Operation Manual