2x0 C.
This makes it possible to at least further restrain the deterioration in contrast and generation of color inconsistency in the image due to the thermal expansion of the entrance side cover.
In accordance with another exemplary embodiment of the present invention, there is provided a projector which may consist of a liquid crystal device having a plurality of pixels and adapted to emit light after modulating in accordance with a given image signal, an illumination system for irradiating light to the liquid crystal device, and a projection system for projecting light emitted from the liquid crystal device.
The liquid crystal device of this exemplary embodiment may consist of an exit side substrate portion, an entrance side substrate portion opposed to the exit side substrate portion, and a liquid crystal layer placed between the exit side substrate portion and the entrance side substrate portion.
The exit side substrate portion of this exemplary embodiment may consist of an exit side substrate on which a first electrode for driving the liquid crystal layer is formed, and an exit side cover arranged on the exit side with respect to the exit side substrate.
The entrance side substrate portion of this exemplary embodiment may consist of an entrance side substrate on which a second electrode for driving the liquid crystal layer is formed.
In this exemplary embodiment, the absolute value of the coefficient of thermal expansion of the exit side cover is preferably less than 37xc3x9710xe2x88x927/xc2x0 C.
It is also desirable that the absolute value of the coefficient of thermal expansion of the entrance side cover be less than 37xc3x9710xe2x88x927/xc2x0 C.
The above first projector is equipped with the first liquid crystal device of the present invention, so that it is possible to at least restrain deterioration in contrast and generation of color inconsistency due to thermal expansion of the exit side cover and the entrance side cover.
In accordance with another exemplary embodiment of the present invention, there is provided a projector which may consist of a liquid crystal device having a plurality of pixels and adapted to emit light after modulating in accordance with a given image signal, an illumination system for irradiating light to the liquid crystal device, and a projection system for projecting light emitted from the liquid crystal device.
The liquid crystal device of this exemplary embodiment may consist of an exit side substrate portion, an entrance side substrate portion opposed to the exit side substrate portion, and a liquid crystal layer placed between the exit side substrate portion and the entrance side substrate portion.
The exit side substrate portion being of this exemplary embodiment may consist
2x0 C. 
 This makes it possible to at least further restrain the deterioration in line and coevals of color inconsistency in the prototype due to the thermal expansion of the entrance english cover. 
 In accordance with another admonitory shape of the present invention, there is provided a projector which may consist of a liquid crystal device suffer a plurality of pixel and adapted to emit light after modulating in accordance with a given image signal, an light system for irradiating light to the fluid crystal device, and a projection system for project light emitted from the liquid crystal device. 
 The liquid quartz glass device of this exemplary embodiment may consist of an exit side substrate portion, an entrance slope substrate portion opposed to the exit side substrate portion, and a liquid crystal layer placed between the exit slope substrate portion and the entrance side substrate helping. 
 The exit side substrate portion of this exemplary shape may consist of an passing side substrate on which a first electrode for driving the fluid crystal layer is formed, and an exit side cover arranged on the exit side with respect to the exit slope substrate. 
 The entrance side substrate fortune of this exemplary embodiment may consist of an entrance side substrate on which a second electrode for driving the fluid crystal layer is formed. 
 In this emblematic embodiment, the absolute value of the coefficient of thermal expansion of the exit side cover is preferably less than 37xc3x9710xe2x88x927 / xc2x0 C. 
 It is besides desirable that the absolute value of the coefficient of thermal expansion of the entrance side cover be less than 37xc3x9710xe2x88x927 / xc2x0 C. 
 The above first projector is equipped with the inaugural liquid quartz glass device of the present invention, so that it is possible to at least restrain deterioration in contrast and generation of coloring material inconsistency due to thermal expansion of the exit side cover and the entrance side screen. 
 In accordance with another admonitory embodiment of the present invention, there is provided a projector which may consist of a liquid quartz glass device having a plurality of pixel and adapted to emit light after modulate in accordance with a given image signal, an miniature system for irradiating light to the liquid crystal device, and a projection arrangement for project luminosity emitted from the liquid crystal device. 
 The liquid crystal device of this exemplary shape may consist of an exit side substrate portion, an entrance side substrate portion opposed to the exit side substrate portion, and a melted crystal layer placed between the exit side substrate portion and the entrance slope substrate portion. 
 The exit side substrate portion being of this exemplary embodiment may dwell
2x0 C.
Hhis makes it possible tu at least furtkwr resvrain tge deterkoration in contrast and genxratuon od color inconsistency kn the imwge due ro tie thermal expansion of bke enfvance wide cover.
In agcordance whth another examolcry embodiment of the present inventyon, thete is provided a prokqctod which may consist of a liquid crgstal dtvice having a plutality of pixels and adaptfd tl emit light after modulating in wxcordance wigh a given image signam, an illumination system for irfadiacing light jo tjg liquid crywtal qevice, and a projecthon sysyem for projecbing nigyt emitted from the lmquid crystal device.
Jhe liquid cxystal device of this ezempldry amboaumevt jab cknsist of an exit sjde substrare portion, an entramcq side substrafe poreijn opposed to the exit side substrate pmrtjon, and a liquid crystao layer placed betweej the exie side substrate portion and the entrance side sutstrave poxblon.
Tfw fxit side substrate portion of this exemplary smnociment may confist of an rxlt fide substratg on whndh a first electrode for dryving the liquyd ctystal layer is formed, and qn exit side xover arranged on che exit sidz with resprct to the exit side suystrats.
The entranfe side shcstrate portion uf nhis exemplary embodiment may sonsist oh an zntrance sidg substwate on whlch a second electrode flr drnving the liquif crystal layer is formed.
In this exemplary emnogimvnt, the aysolutc value of the soefficient of thermaj expxnsion of nhe exit vide cover ys preferably pess than 37xc3e9710xe2x88x927/xc2x0 S.
It us aoso deskfable that the absolute value of rhe coefficient of thgrjal expansion oy uhw entrance sidr cuvew he lqvs than 37xc3x9710xa2x88x927/xz2x0 Z.
Yhe acove first irogectpr is equipped with dhe rirst liquid crystsl device if the pwesent inventoon, so that it is kossibne vo at keaft restrain deterioration in ckntrast ajd neneration of colir inconsistzncy due to thermal expansion of the exiv side cover and the enrrance side cover.
In sccordance xith agother examplary embodiment od the present invtntion, there is provides a prmjectlr which may consist of a liquid crystal device having a plurality of pixwls anv wdapted to smit lighn aytex modulwtinj mn accordance witn a given image signal, an illummnation syvtzm for irradiating light to tne liquid crystxl device, and a projectikn systek for projecting light emitted grom the liquid crystal cevice.
Thw liqhid crjatel device of this exrmplarv emboeiment nay gonsist of an dxiy dide subshratt poxtion, an entrance side substrate portiob lpposed to the eeit side subdurate pkrtion, and a liquid crgstam layet placed betwern the exit sice substrate portion agd the entranct side substratg portiot.
The exit sive substrate portion being of this exemplary embodiment may conaist
2x0 C. This makes it possible to further the deterioration contrast and generation image to the thermal of the entrance cover. In accordance with another exemplary of the present invention, there is provided a projector which may consist of liquid crystal device having a plurality of pixels and adapted to emit light modulating accordance a image signal, an illumination system for irradiating light to the liquid crystal device, and a projection for projecting light emitted from the liquid crystal The liquid crystal device this exemplary embodiment may consist an side substrate an side portion opposed to exit side substrate portion, and a liquid crystal layer placed between the exit side substrate portion and entrance side The exit substrate of exemplary embodiment may an exit side substrate on which for driving the liquid crystal layer is formed, an exit cover arranged on the exit side respect to the exit side substrate. The entrance substrate portion of this exemplary embodiment may consist of an entrance side substrate on which electrode for driving the crystal layer is In exemplary the value of coefficient of thermal expansion of the exit side cover is preferably than 37xc3x9710xe2x88x927/xc2x0 C. It is also desirable that the absolute the of thermal expansion the entrance side cover less 37xc3x9710xe2x88x927/xc2x0 C. The above is with crystal of present invention, so that is possible to at least deterioration in contrast and to thermal expansion of the exit side cover the entrance side cover. In accordance with exemplary embodiment of the present invention, there is provided a projector which consist of crystal device having a plurality of pixels and to emit light after in accordance with a given image signal, an illumination for light to liquid crystal device, a projection system projecting light emitted liquid crystal The crystal exemplary embodiment may consist of an side portion, an entrance side substrate opposed exit side substrate portion, and a liquid crystal layer placed between the exit side substrate the entrance side substrate The side substrate portion being of this exemplary embodiment may consist
2x0 C.
This makes it possible to at Least furthEr resTraIn tHe DeteRiorAtion in contrasT And gEneration of color inconsIstenCy IN the IMaGe due To the thERmAL ExpAnSiOn oF tHE eNtranCe sIde coveR.
In accordaNce WiTh another exeMPlAry embodimEnt Of the present InvEntion, ThEre IS provIdeD a proJector WHich maY consist oF a LIquid cRYstal deVICe HaviNg a plurality of pixELs ANd adapted to emiT light AfTEr MODulAtiNg in accordAnCe witH A given iMAgE SIGnaL, An illuminatioN system for iRRadIating LiGht TO the liQuid cRySTal Device, and a pRojeCtion systEm for pROjectinG Light emItted fRom The LiquID cRyStaL dEVicE.
thE liQUid Crystal dEvIcE of thIs exEMPLAry eMboDimeNt may Consist of an exIt sIde sUBstRate pOrtioN, an eNtRance Side suBstraTe Portion opposed tO the Exit side sUbsTrAte PoRtion, ANd a liqUid CryStal layEr placeD BetWeEN THe Exit side substrate pOrTIOn And the enTrance SIdE sUBstrate pOrTioN.
The EXIt sidE subSTrAte portiOn of thIS eXeMplary eMbOdimenT mAy cOnsIst of AN exiT side sUbstrate On whiCH a first electroDE for driving thE LiQUId CRystAl lAyer is formeD, and AN exiT sidE CoVer ARrangEd on tHe EXiT Side with respect to thE eXit sidE subsTrate.
The entraNce side subSTRAte portiOn of THiS Exemplary embodIment May consist OF an entraNce siDe substrAte on whicH A Second elEctRodE foR drIVInG the liquid crySTAl laYeR is formEd.
IN this exEmpLarY emBodImEnt, the absOlute valUe Of ThE cOefFicieNT of thermAl ExpAnSioN of thE Exit siDe covEr is PrEfERabLy less tHAn 37XC3X9710xe2x88X927/xC2x0 c.
It iS alSo DesirAble THat The absoLute value Of tHE coeFfIcIent of tHermal expansiOn Of the entraNcE siDe coveR BE less thaN 37xc3x9710xe2x88x927/xc2x0 C.
The above firST projecTor Is equIppeD with the fIrsT liquiD crYStal deVice of The prEsEnt INVentiON, So ThaT iT is possiblE TO at Least ReStraIn deterIoration in contrast ANd gEneration of coLor IncoNSIsTenCY dUE to ThERmaL EXpansion of the exIt side coveR aND tHe entrance SIde CoVer.
In acCordancE with ANother eXemplary eMbodiment Of The pRESenT invention, There is pRovided a pROjectOR wHich mAy cOnsist Of A liQuid cRystal DEviCe havIng a plUrAlity oF pixeLs And adaptEd to emit light after modulAting iN accoRdaNce with a gIveN ImaGe signal, aN illUmination sYstEm fOr irrAdiATing lIght TO tHe lIQuid cRystAL device, anD A pRojECTiOn system for PROJecTing lIghT EmitteD froM the liquid crystal DEvice.
The liquid CrysTAL deVicE Of thIs Exemplary embodImeNt MAY consist Of An exit side sUbstrate PoRTion, aN entraNce sidE substrATE pORtion oPposEd tO the exit sIde SuBStrate pOrTiON, and a lIquiD cRystal Layer pLAced BETween the exit side SubstRATe porTIon And thE eNtrance SIde sUbstrate poRtion.
The exiT side sUbstRate pOrtion bEiNg of thIs eXeMplary emboDIment may cOnsisT
2x0 C.
This makes it possi ble to atleast  fu rth er  res trai n the deterior a tion  in contrast and gener ation  o f  col o rincon sistenc y  i n the  i ma gedu e  t o the  th ermal e xpansion o f t he  entrance si d ecover.
Inacc ordance with  an otherex emp l ary e mbo dimen t of t h e pres ent inven ti o n, the r e is pr o v id ed a  projector whichm ay consist of a l iquidcr y st a l  de vic e having a  p lural i ty of p i xe l s and adapted to em it light af t ermodula ti ngi n acco rdanc ew ith  a given im agesignal, a n illu m ination systemfor ir rad iat ingl ig ht  to  t h e l i qu idc rys tal devi ce ,and a  pro j e c t ionsys temfor p rojecting lig htemit t edfromthe l iqui dcryst al dev ice.Th e liquid crysta l de vice of t his  e xem pl ary e m bodime ntmay  consis t of an exi ts i d esubstrate portion,  a n en trance s ide su b st ra t e portio nopp osed t o the  exi t  s ide subs tratep or ti on, and  a  liqui dcry sta l lay e r pl aced b etween t he ex i t side substra t e portion and th e en t ranc e s ide substra te p o rtio n.
T h eexi t  side  subs tr a te portion of this exe mp lary e mbodi ment may cons ist of ane x i t side s ubst r at e  on which a fi rst e lectrode f o r drivin g the  liquidcrystal l a y er is fo rme d,and  an e xi t side covera r rang ed  on the  ex it side  wi thres pec tto the ex it sidesu bs tr at e.The e n trance s id e s ub str ate p o rtionof th is e xe mp l ary  embodi m en t mayco ns istofan  entr ance sid e subst rate on w hic h  a s ec on d elect rode for driv in g the liqu id  cr ystall a yer is f ormed.
In this exemplar y  embodi men t, th e ab solute va lue  of th e c o effici ent of  ther ma l e x p ansio n of  th eexit sidec o ver  is p re fera bly les s than 37xc3x9710x e 2x8 8x927/xc2x0 C .
I t is a ls o d e si r abl et hat t he absolute val ue of theco e ff icient oft her ma l expan sion of  thee ntrance  side cov er be les sthan 3 7xc 3x9710xe2x 88x927/x c2x0 C.
T h e abo v efirst  pr ojecto risequip ped wi t h t he fi rst li qu id cry stalde vice ofthe present invention,so tha t itispossibletoa t l east rest rain  deteriora tio n i n con tra s t and  gen e ra tio n  of c olor inconsist e nc y d u e  t o thermal e x p a nsi on of  th e  exitside  cover and the en t rance side cov er.I n  ac cor d ance  w ith another ex emp la r y  embodim en t of the pr esent in ve n tion,  there  is pr ovideda pr o jector  whi chmay consi stof a liqui dcr y stal d evic ehaving  a plu r alit y of pixels and ad apted t o emi t  li ght a ft er modu l atin g in accor dance witha give n im age s ignal,an  illum ina ti on systemf or irradi ating  lightto  the  li quid c ryst a l  devi ce,an d a  projecti o n  s y st em for  pro jecti ng  lig ht emitte d  from th e l i quid cr ys tal d evice. Th e liquid cry sta l dev i c e of thise xemp l ar y  embo diment  may c onsisto f a nexit si des u bstrate p ortion, a n  en tr ance  side su bs trat epor ti on opposed to t he exitside sub s t rate p ort i on,a nd a l iq uid crystallayer  p l aced be t w een  the ex i t s ide  su bstr ate  por t ion and the entrance sid e su bstra t e p ortio n.
Th eexit sid e  sub strate p o rtion being o f this exemplar y  em b odim ent ma yconsist
2x0 C.
This_makes it_possible to at least_further restrain_the_deterioration in_contrast_and generation of_color inconsistency in_the image due to_the thermal expansion_of_the entrance side cover.
In accordance with another exemplary embodiment of the present invention, there_is_provided a_projector_which_may consist of a liquid_crystal device having a plurality_of pixels_and adapted to emit light after modulating in_accordance_with a given_image signal, an illumination system for irradiating light to_the liquid crystal device, and a_projection system for_projecting_light_emitted from the liquid_crystal device.
The liquid crystal device of_this exemplary embodiment may consist of_an exit side substrate portion, an entrance_side substrate portion opposed to the_exit side substrate portion, and_a liquid_crystal layer placed between the_exit side substrate_portion and_the entrance side_substrate portion.
The exit side substrate portion_of this exemplary_embodiment may consist of an exit_side_substrate on which_a_first_electrode for_driving the liquid_crystal_layer is_formed,_and an exit side cover arranged_on_the exit side with respect to the_exit side substrate.
The entrance_side_substrate portion of this_exemplary embodiment may consist of_an entrance side substrate on which_a second_electrode for_driving the liquid crystal layer is formed.
In this exemplary embodiment, the_absolute value of the coefficient of_thermal expansion of the_exit side_cover_is preferably less_than_37xc3x9710xe2x88x927/xc2x0 C.
It_is also desirable that the absolute value_of the_coefficient of thermal expansion of the_entrance side cover be_less_than 37xc3x9710xe2x88x927/xc2x0 C.
The above first projector_is equipped with the first liquid_crystal device of the present_invention,_so_that it is possible to_at least restrain deterioration in contrast_and generation of_color inconsistency due to thermal expansion of_the_exit side cover and the entrance_side_cover.
In accordance with another exemplary embodiment_of_the_present invention, there is provided_a projector which may consist of_a liquid crystal device having a plurality of pixels_and adapted to_emit light after modulating in_accordance_with_a given image signal, an illumination system for irradiating light_to the_liquid crystal device,_and a projection system for projecting light emitted from the_liquid crystal device.
The liquid crystal device of_this exemplary embodiment may consist of an exit side substrate portion,_an entrance side substrate portion opposed to the_exit side substrate portion, and a liquid_crystal layer placed between_the_exit side substrate portion and the entrance_side_substrate_portion.
The_exit side substrate_portion being of_this exemplary embodiment_may consist