Epson 5020UB
Contents
1. both arrangements of color panels and proportion of color panel colors they use to create various colors on screen Even with a given projector the proportions change depending on the color mode you re using which is why colors look different with different color modes This means that the ratio between white light output and color light output will vary from one DLP projector to another and even for the same projector from one color mode preset to another In one set of tests with business projec tors in the 2000 to 3500 lumen range that the 3LCD Group provided the actual level of color light output as a percentage of white light output for any given DLP projector ranged from about 20 to 60 percent My own tests have turned up an even larger range with color light output running from about 20 percent to well above 80 percent of the white light output for any given projector On average however the 3LCD Group says the ratio between white brightness and color brightness is about three to one compared with one to one for 3LCD technology All of which is the basis for Epson s claim of offering three times brighter color A Real World Example To get an actual example of the difference between an LCD and DLP projector with the same ANSI lumen rating I tested one of each Both are rated at 3000 lumens and both came in a little higher on my tests at 3087 lumens for the LCD projector and 3198 lumens for the DLP projector For2. c ela Kra r pa k LR ore EF RAR WEA Perth P E WH c hiarr kn cp pcp fc AN Bon c gree Oe Biar ences pa La hu SE o erh Pa Lie 0 HR gmt cl T id Fao 79 Of aae Pd Ea Tees EG AAS WA OT Paar a e i T 7 Ja a Pee ee ede a re ra 7 E x Li Sia d cones won 2 Ks 61 lt ey Nad eit 1 REEE L Ba pigs _ iall E LT KI era E up sb sia ers KE X EEE Z Ey r c rann aa 9 rvn strata E a A fs eed l mae ee r mra mr se va al n YR im t fa ll TR Rol X es e a 84 tors dar mb Pa n ee r E ee rE 9 RRR B lt C r x i L Sr ee i v eee Pp Bee K R a ee aiii K P ey Ea E Rb rr Bee f rs sR gian Sa a nan Ler 4 arra ES Spe r t kran rria rek Ke eare Pr rk RR K 6 Ra rr ba Bann r rria r an an Ta tne Kr ba ke jo E pra eaa 1 R A oon p Sees Pn KE Se Se A Lr l Pa Pr a enen lt P Rania r eg en p en f r r Ba E E Ra fed PR iania mna r C Kr ee R Ra KES as Pera R a we ieia miaa aa me maa pere rd Pta B dk r pen na ben p er pab Dia TT me RS SS 0 P P ey Sea ee cars TET G r KER eee ca pad 9 ee maa Tepe a Pe art 6 Krn Be pR 8 7 preg e ebe rampom Patr Hain ia a ma Be a PE fe ee He ee eB eae ra HE Ta X SS Pa eee pr a al d veran KR spi Ka pp p pepa p PELES Fo seia hasmi iar wr Pa ai 0 ba pr b LBI pt pp Rr Re L eer Tumit he grai H parang Fem Te a Fe Pt Baat tria SEAH iaa ha Fa se eed ie her ms paa riana APR Be e 9 Tera wr ibe WE Pa iaia of eee He 7 1 Pan Spee T i ED W eg Fae E ae br hp ce H as
3. kas ia Par pengi Pal ma e ven gE Hr ow RE ke deen pa e e P ennn ES Pee Kbi 1 6 Ha nt pa Pits b gip m POE PG B BEE org Ee iat d pa pE a a N O eae ee rea bose ps Ket BIE el oY B ey m D EBS Pp 1 P E Peal Py MERE Bev tra Ta oe fa gt S R Perr PEK N bE H evine P K caer c Aa B nll lian N E Pie Pr pry oF RE e eK Ren Pia lec L EE KOR pre Kt Po eie 0 Ee peg en TR v v r ee H a Pis 6 red ere 2 Se Pe ae RN TE PAT RR BI pr Ce r F c KP Sage Gon PR pra Tara Tepili T naa fres ke dec Fa P r mran a E K BU ese Agee Ered me Tate d M pba rre pa 1 rt 8 Pa Barr o Par PPS a Lam of By d ol Of Er reqs Pd Fee rm 70 ia a EE P be i P cT pta E d h Ea rpn 9 vel Haa EPA S TTS b m ir ORAO Y Ea Lepa 3 P Sir eco Fan Pir Hie 9 1 Pete PE Wie ptum haea bee LY Para ae dB TRE r a erp Pr ee Ba ed lt Ka el 78 erei PEE P a ria 0 ba Bro C ha esr N ie A Lr Rea KEL P Epi g t imire Pu ausia te mmm Pa 9 See ma fon a As you can immediately see in the second version of the photo the image from the DLP projector on the left is easily as bright as the image from the LCD projector on the right In fact the DLP projector s image is a little brighter in this case primarily because the white characters on black are thicker with the DLP projector than with LCD projector and the black characters on white are thin ner making the overall image brighter The photos below show what happens with a color image H
4. or photos the LCD projector will be brighter PCMAG COM Color Brightness By M David Stone May 7 2013 A you may have noticed there s a relatively new spec for projectors in town variously called color brightness color light output or simply CLO Whatever you call it is has an excellent pedigree as part of the Infor mation Display Measurements Standard version 1 03 IDMS 1 dated June 1 2012 IDMS 1 was developed by the International Committee for Display Metrology ICDM which is part of the Society for Information Display SID in cooperation with the Video Electronics Standards Association VESA All of which makes it a pretty definitive standard As you may also have noticed Epson recently began touting its LCD projectors as having three times brighter colors than leading com petitive projectors The claim also applies more broadly to any projector using 3LCD technology which means a light engine with three LCD chips with one each for the red green and blue primary colors The competition Epson is referring to is the universe of DLP projectors that use a single What It Is Why It Matters DLP chip which I ll refer to simply as DLP projectors The claim is based on the typical difference in color light output between a 3LCD projector and a DLP projector that both have equal brightness in ANSI lumens which mea sures white light output The problem with the claim is that although
5. short stories His work has appeared in Analog After being born in and spending most of his life in or near New York City David moved to Pennsylvania several years ago but still considers himself a New Yorker and refuses to give up the New York area code on his cell phone
6. PCMAG COM P Dez Color Brightness What It Is Why It Matters Color brightness color light output or simply CLO has an excellent pedigree as part of the Information Display Measurements Standard The standard was developed by the International Committee for Display Metrology ICDM which is part of the Society for Information Display SID in cooperation with the Video Elec tronics Standards Association VESA All of which makes it a pretty definitive standard 1 chip DLP 3 chip 3LCD Differences in image brightness are a big part of why color brightness 1s worth knowing about Almost all DLPs boost their brightness for white light which is what ANSI lumens measures by adding one or more additional panels beyond red green and blue The DLP projector s color brightness is only 21 percent as much as the 3 chip 3LCD projector The difference in color brightness however was huge with the LCD projector delivering essen tially the same number for color brightness as for white brightness and the DLP projector coming in at just 680 lumens or about 21 percent of its measurement for white light What these results confirm is that as a practical matter if you re showing primarily black and white images like word processing documents or spreadsheets DLP and LCD projectors with the same ANSI lumen measurements will both be equally bright For color images however whether PowerPoint slides
7. SS Ha a S E P Boit Bd grenen a ee er ap oe ee a a a a 4 8 Re ee e K Ss Era EE LE d b Piba br ee rs isa ter sed c a a EAL E K K b a ea be it BEEE a en e Baral ae Er FI E KeK K E eed wel Roses pol eee D a Yr a La a pee Le oe LEA ee a l Hide rm eet SS EA Sg P beb re Gee Ba se ra aa iaae iim 1 Se F Rees K BL Ra Pa a bor a oe le a a ee a ce p i eee H SS ea ees Hr a ce Ba aE p P Bura s 1 barea ee na ai A r SRi biei mi pim pa Pr siy ee rtd ia 5 iil B pn gaie piba ee Teal SS ria aS BPR P BAB aind see bs a piir pri Pret fl mr K ECR E hiem ra prar v a Pra K Para pa ban gt B i ee eal K ai mp Ran menn wnn rale eare ee E Ki R r Pan be t S p ET E n pena Tha 7 OE Eel RE T Oe HRS cn Sere eT R Ha a E ari Sah eeh C arg b B e ba Pa PPR Taare R gh or aR K A ame aran b EF SENES a i mee e PA a Pd beg Ba Babies va pao pre as p eg a rappel Can va pm N na i ij z Ya Tr e ren mpa EP EF Papir Per 8 tas cea rr v KA Ea peet G Pa berrad Pg N ean bat pir d Nent HERIT BE et pee R casey Ta paa P paee A e R sn e 19 Kr Baga g Pompe eter Ta cpr oe SE KEEP KR K RI KBA Tar ee a Fa pk CBN poe irn Bi Mi raal om pes ithind ged pe L K T es oe ote repaz he comes Se B F ARL Fe F rF E Dee S R Et pe Ber c E PAE Pi Ee KE x L v k FOP pep p Bemi Z una FLAY Lites 9 Pa pare SE rere Dap eat arg Pe i e Brg 79 pret 0 FR eT te erle pra N N SS Pare ee m 2 mh f 7 aae e ee Pres a 2 K pamen PS Pa CTT 8 Pa oe Tha
8. ere again there s little brightness difference for white but a substantial difference for each of the colors On the other hand also note that if you compare the relative brightness for the red green and blue areas the DLP projector is a lot more than one fifth as bright as the LCD projector to the human eye even though it s color brightness is only 21 percent as much These differences in image brightness are a big part of why color brightness is worth knowing about when you re trying to determine a projector s brightness which in turn determines how big an image you can use in a given level of ambient light The other reason color brightness matters is because of the issue I mentioned earlier namely that color brightness can also tell you something about color quality To my mind that s actually far more important than the question of brightness as such but I ll save that for a separate discussion Stay tuned About the Author M David Stone Lead Analyst Printers Scanners amp Projectors m david stone verizon net M David Stone is an award winning freelance writer and computer industry consultant Although a confirmed generalist with writing credits on subjects as varied as ape language experiments politics quantum physics and an overview of a top company in the gaming industry David is also an expert in imaging technologies including printers monitors large screen displays projectors scanners and digital cameras stora
9. ge both magnetic and optical and word processing He is a recognized expert on printers well known within the industry and has been a judge for the Hewlett Packard HP Invent Awards His more than 30 years of experience in writing about science and technology includes a more than 25 year concentration on PC hardware and software He has a proven track record of making technical issues easy for non technical readers to understand while holding the interest of more knowledgeable readers Writing credits include nine computer related books major contributions to four others and more than 4 000 articles in national and worldwide computer and general interest publications His books include The Underground Guide to Color Printers Addison Wesley Troubleshooting Your PC Microsoft Press and Faster Smarter Digital Photography Microsoft Press Much of David s writing has been for PC Magazine and PCMag com He has been a frequent contributor since 1983 a Contributing Editor since 1987 and Lead Analyst since 2004 His work has also appeared in a number of other print and online magazines and newspapers including Wired Computer Shopper eWeek and Science Digest where he was Computers Editor He also wrote a column for the Newark Star Ledger for several years Non computer related work runs the gamut from the Project Data Book for NASA s Upper Atmo sphere Research Satellite written for GE s Astro Space Division to occasional science fiction
10. it s both true and mean ingful it s also easy to misunderstand Why Three Times as Bright Isn t Three Times as Bright The first issue is that brightness is actually the wrong word although almost everyone uses it this way and I ll continue to use it through the rest of this discussion Technically however brightness refers strictly to perception so how bright something is means how bright it looks The intensity of light that s coming out of the projector is more properly called illuminance The difference matters because perception of brightness is logarithmic Triple the illuminance of a projector and the same size image will look brighter but nowhere near three times as bright So what Epson is actually claiming is that its 3LCD projectors typically deliver color with three times the illuminance of DLP projectors with the same ANSI lumen rating not three times the brightness in the technically correct definition of brightness A second semantic issue is that you can also use brightness as a term for describing color quality In fact the hue saturation brightness color model uses brightness as one of the three param eters for describing any given color with a vibrant yellow for example qualifying as brighter than a less vibrant version of the same yellow hue What makes this second issue particularly prob lematic is that a projector s color brightness actually does tell you something about its color quality Howeve
11. projectors in the 3000 lumen range the roughly 110 lumen difference is far too little to be noticeable In fact it s within the error range for the tests The difference in color brightness however was huge with the LCD projector delivering essentially the same number for color brightness as for white brightness and the DLP projector coming in at just 680 lumens or about 21 percent of its measure ment for white light I also measured the brightness for both in the best color quality mode for each using Theater mode for one and the equivalent Movie mode for the other Both projectors came in at about the same bright ness for white light for these modes too at about 2000 lumens and here again the LCD projector offered the same results for both white brightness and color brightness The DLP projector did relatively better on color brightness than in its brightest mode but still came in at a much lower number with color brightness at 794 lumens or 39 percent of its white brightness for Movie mode The Practical Difference in Brightness What these results confirm is that as a practical matter if you re showing primarily black and white images like word processing documents or spread sheets DLP and LCD projectors with the same ANSI lumen measurements will both be equally bright For color images however whether Power Point slides or photos the LCD projector will be brighter To prove the point I set up the two projecto
12. r the relationship between the color brightness and color quality is compli cated Because of that I will ignore issues of color quality for the rest of this discussion and cover them separately What I ll concentrate on here is the difference in color brightness mea surements between 3LCD and DLP projectors Where Brighter Colors Come From The reason for the difference in color brightness between the two technologies is easy to under stand Projectors with 3LCD technology simply add red green and blue together to create white So if you measure the lumens for red green and blue separately and then add them up the total will be the same as the industry wide ANSI lumen measurement for white In contrast DLP projectors create colors by projecting one color at a time in sequence The vast majority use a rotating color wheel shining light through color panels on the wheel Almost all boost their brightness for white light which is what ANSI lumens measures by adding one or more additional panels beyond red green and blue typically using some combination of white a clear panel cyan and yellow If you measure the brightness for red green and blue with these projectors and then add up the mea surements the total will be less than the mea surement for white by however much the addi tional panel or panels add to the total ANSI lumen measurement Different DLP projectors use different color wheels with a variety of
13. rs side by side and took photos shown below of some of the DisplayMate images we use for testing as well as some additional images In each case I ve also included two versions of each photo with the origi nal in color followed by the same photo modified in Photoshop to remove the color information The second version makes it a easy to focus specifically on brightness without your sense brightness being affected by color Keep in mind that because camera sensors don t see brightness or color quite the way the human eye does and because colors and brightness can also change somewhat depending on the computer monitor you re using the third generation images as you see them aren t quite the same as the origi nals that show on the projector screen In particu lar on my computer screen at least white shows as a touch brighter for the DLP projector even though I measured the two as essentially equal brightness That said the photos are close enough to the origi nals to be reasonably good representations of what the originals look like The first set of photos below shows both black text on a white background and white text on a black background click on the images to enlarge Biim ie 14 ss S ra re ma D rma a ee E Ia r le a rra HS pR P E LE R ek eS SS CEA K ee ee ee ee Y mn KA oe r i eme bat SS Se dib im b C 8 hg e SS a ee r N a er ep fs pees Pra na re ee a a Fi T toe ae E eee e K GEE o En a E
Download Pdf Manuals
Related Search