Electrohome VistaGRAPHX 10K, Руководство пользователя

Страница: 12 / 127

Downloaded from Projector.com
,167$//$7,21 #)# 6(783
9LVWD
*5$3+;
#43 . # 8VHU * V # 0DQXDO
50;
◊
As screen size increases, magnification increases which reduces
brightness. Select a screen size which is appropriate for the venue,
but not larger than that required.
◊
Installing a large screen in a small room is similar to watching
television close up; too large a screen can overpower a room. A good
rule of thumb is to be no closer than 1.5 times the width of the
screen.
◊
Larger screens require greater attention to lighting conditions.
•
When laying out the projection room, consider positioning the projector and
screen in a manner which will achieve maximum audience coverage and
space efficiency. For example, placing the screen along the larger wall in a
rectangular room will reduce audience coverage. Figure 2-8 shows two
examples of how audience coverage is maximized.
)LJXUH #50;1# 6FUHHQ # /RFDWLRQV # IRU # 0D[LPXP # $XGLHQFH # &RYHUDJH
Installation type, screen type, and lighting all affect where the projector is
positioned. In addition, both throw distance (the distance between the projector
and screen) and vertical position (the height of the projector in relation to the
screen) must be determined for every new installation. Both depend on the
screen size and projector lens type you are using. Make sure that the room can
accommodate the required position of the projector for the chosen screen size.
Throw distance is the distance between the projector's front feet and the screen.
It is measured perpendicular to the lens surface and screen surface. As you move
the projector farther from the screen, the image becomes larger.
Throw distance is roughly equal to the horizontal width of the screen multiplied
by the type of lens you are using. For example, if you are using a 3.9:1 lens,
throw distance should be approximately 3.9
[
the screen width. Once you know
your screen size, you can estimate how far away the projector should be, as
shown in Table Chapter 2 -1.
,03257$17 =
For exact placement in an
installation, always refer to the throw distance formula and/or graph for your
lens as listed in Appendix E.
516 3URMHFWRU
3RVLWLRQ
DQG # 0RXQWLQJ
7KURZ # 'LVWDQFH
ö