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Appendix 2: Principal of Model
Selection of Video Wall Display Plan
(PDP/LCD/DLP/ Projection Combined)
Nowadays splicing display technology have four main types, includes LCD, plasma,
DLP, projection and etc. We Dahua have developed self-owned products for all the four
types. After our study in splicing display field for years, we came up with our own selection
standard. We will introduce with examples of current 46”and 50”product; the key
speci
fications are not only based on manufacturer’s technical specifications, but also
based on industry practice and extempore contrast of different products. Right now the
standards within the industry have not been identical, for instance, LCD brightness takes
CD as standard, but projector takes LM as standard. Even if same as CD, different
manufacturers still have different measurements, for instance, the product brightness
tests of LG plasma and Samsung LCD panel vary, which may cause large difference in
practice. As a result, when we compare products of different types, we need to look at the
actual products. Our rating standard is shown as follow, reference only:
46”LED
Super
Narrow
60”
Plasma
50”
Tradition
al DLP
Projector
Note
Splicing
Seam
5.7mm
2.8mm
0.5mm
0
Selection of seam should
be based on signal
source, and full scene (i.e.
small seam for map).
Requirement of seam for
single monitoring scene is
low.
Brightness
Bright
Bright
Normal
Normal
DLP is identical with
projector core lighting
technology, and its
brightness is evidently
lower than LCD and
plasma.
Dynamic
Display
Effect
Good
Very good
Good
Good
For dynamic scene, effect
of plasma is much better
than other technologies.
This relates to their
image-forming principal.
Static
Display
Effect
Good
Relatively
Good
Good
Good
Plasma is weaker, and
mainly faces problems of
screen burning and light