Colour Wheel Options
p r o j e c t i o n d e s i g n C o l o u r W h e e l O p t i o n s – p a g e 2
W H I T E P A P E R
projectiondes ign unique Colour Wheel Options
All pro jectiondesi gn p rofessi on al F-series projectors h av e th e option of u se r
specifi ed c olour wheels op ti ons, to per fe ct ly match appl ic at ion req ui rements.
DLP™ te ch no logy crea te s proje ct ed images by presenting co lo ur s in a
sequent ia l format, using t he primary co lo ur s red, green, and bl ue to cre at e
and rep roduc e an y computer or v id eo generated co lo ur or combi na ti on of
colours . Se quential colo ur d isplay work s by d isplaying o nl y one single co lo ur
at the ti me , for very sh or t periods, so t ha t the eye and b ra in interpre ts the
res ul ti ng image as a f ull colour on e. S witching be tw ee n the primary c ol ours,
thus cr eating full c ol our images, h ap pe ns incred ib ly fast, im pe rceptible t o the
human e ye .
By givi ng t he user or in te gr ator the op ti on t o specify c ol ou r wheels,
pro je ct ors can be ta il ored to s pe cific req ui rements a nd applicatio ns ,
such as p ure black a nd white imagin g, w ide colour ga mu t simulation an d
visuali za ti on, general g ra ph ics display, medical im ag in g, and so f or th .
Each co lo ur wheel option g iv es slightly d ifferen t performance c ha racteristics,
enablin g a perfect match t o the desired applcation .
What are the options?
Each mo de l has slightly di ffere nt options, dep en di ng on their s pe cification
and con st ru ction. There are, ho we ver, certain opti on s that can fi ll o r fit the
same re quire me nt s, even thoug h th e actual colo ur w heel is dif feren t. T he re
are t hree ma in c at egories:
High Br ig ht ness
General G ra phics Display
Vis ua li zation and Si mu lation
Obvious ly, colour w he els that fit in to these thre e categorie s ca n also be use d
for oth er a pplications. Mo re applic at io ns in gener al , an d their ant ic ip ated
req ui rements , are liste d be low.
•
•
•
p r o j e c t i o n d e s i g n C o l o u r W h e e l O p t i o n s – p a g e 3
W H I T E P A P E R
Colour Wheel Opt ion details.
Colour wh ee ls are bu il t up using di ffere nt ly sized segm en ts , consisting of
the pri ma ry colours RGB, a nd with added a cc en ts, such as a c lear (“White” )
segment , or a neutral de ns it y green s eg ment (“NDG” ) se gm ent.
Additio n of a clear segm en t
The add it io n of a clear se gm ent in the co lo ur wheel incr eases maxim um
availab le b rightness from a pro je ctor. By allowing w hi te light fr om the lamp
to pass t hrough wi th ou t being obstr uc te d or colour ed, white a reas of an
image, fo r instance a wo rk s heet in Mic rosoft Exce l, o r a page in Wo rd, will
gain an i nc redible l ig ht output. Ad di ng a rela ti ve ly larg e size clear se gm ent is
common fo r business and presentatio n DL P™ proj ec to rs, as brig ht ne ss and
specifi ca ti ons are v er y important. Us in g a smaller c le ar segment gi ve s added
benefit s; e xtra boost in w hi te parts of t he i mage, thus in creasing av ai lable
brightn es s, and at the s am e time adding m ore brigh tn es s in colours, t hu s
display in g an image more suited for g ra phics and g en er al usage.
Options f or c lear segmen t si zes
pro je ct iondesign o ffers differentl y si zed clear seg me nt s to fit va ri ou s
pro du ct s and vario us u ses and appli ca ti ons. They a re generall y referre d to
after t he ir intended use o r main prop er ties, for i ns ta nc e High Brig ht ne ss
(largest clear s eg me nt), or Gra ph ic s Display (sm al le st clear se gm en t) . For
best po ss ib le applicatio n fi t, it is im po rt an t to have a c le ar understand in g of
the pur po se of the insta ll at ion when or dering proj ectors. Ref er t o table below
for app li ca tions and recommendation s.
3-segme nt R GB , and 6/7-s eg me nt RGBRGBG, n o cl ear.
The bes t po ssible image qu al ity is re ac hed with th e 3- a nd 6-segmen t co lour
wheels, w it hout any clea r se gment at al l. R em oving the c le ar segment,
and onl y us ing primary c ol ou rs for imag e di sp lay, g iv es better sat ur at ion in
colours , on the expense of s ome maximum b ri gh tness. Imag e qu ality as such
incre as es. The res ulting larger area per colour y ie lds better co lo ur resolu ti on ,
decre as ed artefact in g, and an overa ll m ore bal an ce d image tha n wh en using
a 4-seg me nt wheel. In ad di ti on, the 3-s eg me nt , and 6/7-s eg me nt colour
wheels fe at ure hig he r speeds, so mo re re vo lu tions per m in ut e, which re su lts
in decr easing visi bl e colour brea k up artefact s an d so-called r ai nbow effe ct s.
A 6-seg me nt colour wheel d ou bles the sp ee d ov er a re gu la r wheel, an d dr aws
the ima ge t wice as many ti me s in a give n pe ri od. 3-segme nt w heels run eve n
faster, so ev en w ith a red uc ed number o f se gments, share the same f ea tu re.
This pa rt ic ular feature, plus the i nc reased co lo ur reso lu ti on and satura ti on ,
make th es e wheels the pr im ar y options f or a pp lications s uc h as simulation
and vis ua li zation. 6-seg me nt RGBRGB col ou r wh eels are av ailable for X GA
and 720 p resolutio n projector s, w hereas 3- se gment RGB a re availabl e
for SXG A+ resoluti on p rojecto rs . They fill the s am e req ui rements. Pl ea se
note: 7 -s eg ment colour w he el s with NDG ac ce nt s are not ava il ab le for the
profess io na l F-series, o nl y for 16:9 HD TV d is plays (720p o r 1080p).
RGBRGB(ND)G
p r o j e c t i o n d e s i g n C o l o u r W h e e l O p t i o n s – p a g e 4
W H I T E P A P E R
Sample applicati on details and recommendations
Visualizati on
A vast ra ng e of applicat io ns can be cov ered under th e vi sualization u mb rella.
General ly, visual iz at ion is common ly u sed about a pp li ca tions that se ek to
graphic al ly presen t la rge a mo un ts of data, b e it photograph ic o r computer
cre at ed , such as g eo ph ysical data ( fo r instance oi l an d gas well ex pl or ation),
CAD/CAM c on struction and p ho toreali st ic render in g, computer m od el led
flow a nd s tress a na ly sis, etc. Imm er si ve and augm en te d displays an d Virtual
Reality g o in the visual iz at ion categor y. Vis ua li zatoin aids i n un derstanding
and int er preting d at a, and in gener al , require very hig h resolutio n di sp lays,
and pho to realistic c ol ours with great depth an d co ntrast. Rec om me nded
colour wh ee ls; 3/6-segme nt ( primar y), or 4-se gm en t (secondary) with a sm all
clear s eg me nt added for ex tr a impact.
Simulat io n
Some si mu la tion applicat io ns can be cov ered under th e vi sualization
umbre ll a, but in t hi s case, we re fer to simula ti on as that wh at t alkes place
as a su bs ti tion of rea l life applic at io n. Simulati on i s primarily u se d in training
situati on s, such as for dr iv ing, flying , sa il ing and bri dg e (ships), as w el l
as shoo ti ng , fire ex ti ngushing and a wh ole lot of ot he r training si tu at ions.
Common to m ost of these ap pl ications is t ha t they re qu ire pho to realistic
ren de ri ng, high co nt ra st and detail , an d reduc ed a rtefacting in t he form
of rain bo ws and brea ku p. Recommende d co lour wheels ; 3/ 6- segment for
reduced a rt ef acting and real is ti c colours.
Medical i ma gi ng
Medical i ma ging applicat io ns include fo r in st ance MR and X Ra y imaging.
General requirem en ts include an a ccurate gre y scale, a co rrect gam ma
transfe r fu nction, increased colour d ep th and re du ced artefac ti ng . These
are , of course, a ve ry small part o f th e requi rements i n th is field, but t he y are
rel ev an t to the ch oi ce of colour wh ee ls . Recommend ed c olour wheels; 3 /6 -
segment , or 4-segment wi th a small clea r se gm ent added f or e xtra impact,
dependi ng o n the actual ap pl ication.
Busines s presentat io ns
Most bu si ne ss pres en tations t ak e place in rooms and e nvironm en ts where th e
pre se nt er has litt le o r no contro l over lights a nd enviro nm en t. High bri gh tn ess
is ofte n th e main re qu irement , as that makes t he p resen ta ti on easier to se e
and the e nv ironmen t le ss of a pro blem. Recomme nd ed colour whe el s; high
brigthn es s, 4-segment, o r a general gra ph ic s display col ou r wheel (smalle r
white s eg me nt), for impr ov ed colour repro du ct io n.
p r o j e c t i o n d e s i g n C o l o u r W h e e l O p t i o n s – p a g e 5
W H I T E P A P E R
Colour wheel con figurations and projector model fit
application colour wheel recommendation Available for (order no.)
general office applications,
business presentations
High Brightness (4-segment, RGBW)
F1+ XGA
F1+ SXGA+
F3/F3+ XGA
F3/F3+ SXGA+
some visualization,
control room applications,
24/7 applications,
general multipurpose graphics display,
public display and POS installations
Graphics (4-segment, RGBW)
F1+ XGA
F1+ SXGA+
F3/F3+ XGA
F3/F3+ SXGA+
simulation, high end visualization
Visualization and Simulation,
3-segment RGB, or 6-segment, RGBRGB
F1+ XGA-6
F1+ SX+3
F3/F3+ XGA-6
F3/F3+ SX+3
Loading...