Epson S1 사용자 설명서

Complex terms used in this book, or terms not explained in the body of the 
text, will be briefly explained here. For further explanation, please consult 
commercially available reference texts.

A type of connector used to input analog video 
signals.

The ratio between an image’s length and its height. 
Images which have an aspect ratio of 16:9 are called 
Widescreen. The aspect ratio for standard images is 
4:3.

The temperature of an object which is emitting light. 
When the color temperature is high, colors tend to 
take on a bluish tinge; when the color temperature is 
low, colors tend to take on a reddish tinge.

A type of video signal which has the video 
brightness and color signal information separated, in 
order to provide better image quality. In high-
definition TV (HDTV), it refers to images which 
consist of three independent signals: Y (luminance 
signal), and Pb and Pr (color difference signals).

The standard home video signal (NTSC, PAL, 
SECAM) which has the video brightness and color 
signal information mixed together. Composite video 
consists of the carrier signal Y (luminance signal) 
and the chroma (color) signal, combined within the 
color bar signal.

The relative brightness of the light and dark areas of 
an image, which can be increased or decreased in 
order to make text and graphics stand out, or appear 
softer. 

The process used to cool down a projector lamp that 
is hot from use. Cool-down happens automatically 
when the [Power] button is pressed on the projector 
or on the remote control to turn the projector off. Do 
not unplug the projector power cable while it is 
cooling down. If cool-down is interrupted, heat from 
the lamp gets trapped inside the projector, 
potentially shortening the life of the lamp and 
causing projector failure.

An audio format developed by Dolby



 Laboratories. 

Normal stereo is a 2-channel format which uses two 
speakers, whereas Dolby Digital is a 6-channel (5.1-
channel) system which adds a center speaker, two 
rear speakers and a sub-woofer.

An abbreviation for High-Definition Television, it 
refers to high definition systems which satisfy the 
following conditions:

• Vertical resolution of 750p or 1125i or greater 
(p=

• Screen aspect ratio of 16:9

• 

l audio reception and playback (or 

output)

Each screen is divided into fine horizontal lines 
which are displayed in sequence starting from left to 
right and then from top to bottom. In this method of 
image scanning, even numbered lines and odd 
numbered lines are displayed alternately.

A method of image scanning whereby the image 
data from a single image is scanned sequentially 
from top to bottom to create a single image.