Optically adjustable display color gamut in time-sequential displays using LED/Laser light sources
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1 Optcall adjustale dspla colo amut tme-sequetal dsplas us LE/Lase lht souces splas vol Moo-Cheol Km School of Electcal Eee ad Compute Scece Kupook Natoal Uv.
2 Astact evelopmet of vaous wde colo amut dsplas Polem Colo amut dffeeces etwee wde amut dsplas ad the stadad deftos Colo epoducto s ot equal to oal maes Ovecome method covetoal sstems Gamut mapp alothm Mapulato at ol the vdeo sal that would educe the sal damc ae ad poduc quatzato eo of vdeo sal Poposed method A ew optcal Colo Gamut Pocess Realzato wth a dspla amut wthout a sal atfacts wth ead to pefect colo match fo the vaous stadads /
3 Itoducto Wde colo amut dsplas Hav dffeet colo amut compaed to the stadad colo amut of CRT Mult-pma dspla (moe tha thee pma colos spla wth hhl satuated pue pma colos (LE Lase Msmatch of colo amuts Caus colo dstoto o epoduced maes Appl colo tasfomato Reducto of the damc ae of vdeo sal afte the colo tasfomato F.. Colo amuts of LE ad Lase dspla compaso wth stadad srgb(crt o CIE- chomatct daam /
4 MCGP (Mult-stadad Colo Gamut Pocess A smple optcal pocess whch composes ew pma colos a optcal addtve mtue of oal pma colos a tmesequetal dspla sstem A lumace cemet The dspla of hh lumace s pefeed fo the ette mae cotast The eact match of the colo amut of commecal dsplas seal poducto le CGP (amc Colo Gamut Pocess A ew scee adaptve colo amut Ceato aalz the colo dstuto fo each vdeo fame Iceas the mae cotast Ivesed popoto to the sze of scee colo amut 4 /
5 The asc dea Mult-stadad Colo Gamut Pocess A colo sde the amut tale Repoducto m of the ceta lht poto of thee pma colo o CIE chomatct daam The ew colo amut Composto optcal mtue of oal dspla colo amut P a P + P + c P fo ( Whee P : the tstmulus values of ( X Z the coespod pma colo a ad c : the modulato factos fo lht m F.. Compos of ew pma colos optcal addtve mtue of thee pma colos 5 /
6 6 / / Full mat fom To et a modulato a mat The dspla fowad mat vd to costat pma coodate mat ad a adjustale omalz mat Whee : the equed factos of the lht modulato of the oal pma colos G N M P ( M G M Z X Z X Z X c a c a c a Z X Z X Z X - M M G ( G
7 7 / / To mamze the whte lumace afte the MCGP The s ato of the dspla lumace efoe ad afte MCGP Whee : the modulato coeffcets of thee pma colos ode to set a dvdual dspla whte N P M ( P N ad z z z c a c a c a c a M Ma( G / G / (4 ( / c a (6
8 amc Colo Gamut Pocess The asc dea A optmzed cotol of dspla colo amut coecto wth a colo amut of vdeo fames Vaet of colo amut of each vdeo fame No cove the full ae of the dspla colo amut F.. Schematc daam fo the detemato of scee colo amut 8 /
9 Poposed CGP Cotoll the dspla colo amut deped o a measued scee colo amut Iceas the dspla lumace The smplfed lock daam of CGP Comput a ew pma sstem fo eve vdeo fame Appl to mata the oal colos of mae pels o the ew pma colo sstem as colo tasfomato F. 4. Fuctoal lock daam of CGP 9 /
10 Pecess Leazato fo olea RGB NL the vese toe cuve chaactestc Tasfomato of the lea srgb mat opeato M s to the tstmulus sal XZ (fst pat F M s C s wth F T ( X Z Cs Tasfomato to the CIE chomatct values X / ( X + + Z Gett a scee colo amut (tale P ad P P etem thee depedet pma-les ( L L L P ( P ( ( R s G RG s B s GB T BR (7 (8 (9 0 /
11 etem a mmum dstace d etwee the pma-le ad a test pel chomatct ( p p A eample etwee the le ad the test pel ( p p d ( p ( ( L RG ( + ( p ( (0 etem ew pma-les Pass the thee eaest pots ad paallel to the p RG p RG p GB p GB ; (L RG.L GB p RB p RB L BR B B ; (LRG.LGB LBR ( /
12 / / The fal ew pma pots Solv as coss pots of the coespod two pma les The dspla fowad model fo the ew pma sstem Wth the mat ad a defed taet whte P z z z ( ( ( ( P P P ( Z (X F W W W W P 0 0(0 00(0 (( ad ( ( wth T T N N N N B G R Z X N C F C M C P F ( whee omalz mat : defed whte at the mamum dspla cotol vecto ( C F w Ν
13 Afte fd the ew dspla mat M same pocess wth the pocess (secod pat MCGP The fal modulato a mat fo CGP Use to lht modulato ccut dspla hadwae ode to modulate the pma colos as eplaed MCGP G a a a c c c (4 Colo tasfomato fo the same colo look of dsplaed maes efoe ad afte o mat tasfom (Eqs. (7 ad ( C wth M M T C M CGP M S ( R C S S G M M B T C T M T S C S ( R S G S B S T (5 /
14 CGP at all toethe (fst pat ad secod pat Cha colo amut accod to put maes Ras dspla lumace us suplus test If MCGP ad CGP ae appled at the same tme MCGP Statc sett dspla colo amut accod to the colo amut stadads CGP amcal cotoll the amut of dspla fo a dvdual scee colo amut Uf two modulato mates ad to the total modulato a mat G T G M G G T G M G (6 4 /
15 Pactcal smulato A pcpal daam Sepaato of the RGB pma colos at tme Pesetato of dvdual colo as sequetal m modulat the pma colos F. 5. (a Pcpal dv method of a sequetal colo dspla ad the covetoal dv method ( PWM ad (c AM dv fo optcal m of pma colos 5 /
16 Methods fo the lht modulato PWM (pulse wdth modulato (F. 5 AM (ampltude modulato (F. 5c The coeffcet dees al c (F. 5c The coeffcets of the modulato mates A mtue ato of the phscal lht test Coveso fom lht test to the electc cuet B a pedetemed elatoshp F. 6. Tpcal olea lht test chaactestc of powe LEs fucto of dv cuets 6 /
17 The MCGP smulato Us LE pojecto dspla ased o a tme-sequetal LP techolo Us amut stadad of Adoe RGB ad srgb as taet amut Tale. Chomatct values of pma colos fo a LE dspla two stadad deftos ad the lumace ceas facto appl MCGP F. 7. Colo amut of the LE pojecto dspla compaso wth the two amut stadads of Adoe RGB ad srgb 7 /
18 Fst step Ota the two mat data (MM (Eq. ( Secod step Fom the pma coodates of the LE dspla the taet colo space srgb o Adoe RGB ad a pedefed whte pot 65 whte fo oth amut cases Computato of the mat G fo taet amut M G srgb Modulat the pma colos of the LE dspla MsRGB M LE G MsRGB ( Pefect match fom the LE dspla to srgb stadad sstem Iceas dspla lumace of aout 9.5% (Tale 8 /
19 The CGP smulato Ota the test maes tpcal scees fom V ttles Calculat coespod colo amuts of the scees Ceat ew dspla amut fo the scees us the mat spla the maes wth a ceased scee lumace ad same chomatct values of mae pels o the dspla wth the scee colo amut G F. 8. Oal smulato maes 9 /
20 F. 9. etemed scee colo amuts fo the coespod maes -8 0 /
21 Result of CGP Fo the vsualzato of the esult of CGP smulato Us the maes wth half-lumace Hav cease the ae of 5-7.4% deped o scee amuts fo the scee lumace Hav aveae ceas ato fo tpcal V ttles the ae of aout 0% F.. Results of CGP smulato /
22 F. 0. Iput maes wth 50% lumace educto fom F. 8 ad output maes of CGP smulato wth these put maes /
23 Poposed methods MCGP Coclusos Applcato to the wde colo amut dspla fo the pefect match of the dspla amut to dvdual stadad colo amut wthout a vdeo pocess Iceas the dspla lumace wthout a educto of the sal damc CGP Adaptato of the dspla amut to scee colo amuts of coespod put vdeo fames ode to ehace the scee lumace wthout colo dstoto Povd moe scee lumace fo a low lumace dspla The scee lumace fo srgb colo epoducto Icease aout.6 tmes moe tha the dspla /
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