 and capacity reductions, which occur with the use of these carbonaceous materials, non-carbonaceous materials, such as silicon (Si), are being studied for use as anode active materials.
Such non-carbonaceous materials exhibit a capacity that is at least ten times that of graphite. However, the cycle lifetime characteristics thereof deteriorate, due to volumetric changes that occur during charging and discharging. In addition, non-carbonaceous active materials, such as Si, have a low electrical conductivity and obstruct the flow of electrons, thereby lowering cell performance.
In order to address the problem of poor cycle lifetime characteristics, which occur as the non-carbonaceous materials are fractured due to the volumetric changes, and/or other problems, research is currently being conducted into a binder that can enhance the integrity of a anode active material. The use of carboxymethyl cellulose (CMC)-based binders, instead of a conventional polyvinylidene fluoride binder, has been reported (Electrochem. Commun. 9, 2801 (2007), Electrochem. Solid-state Lett. 10, A17 (2007), Electrochem. Solid-state Lett. 11, A76 (2008), Electrochem. Solid-state Lett. 11, A101 (2008), J. Electrochem. Soc. 155, A158 (2008)).
CMC-based binders are known to improve the cycle lifetime characteristics of non-carbonaceous anode active materials. However, along with an increasing demand for improved cycle lifetime characteristics, research is continuing into a binder that can further improve the cycle lifetime characteristics of anode active materials. 1. Field of the Invention
This invention relates to an image forming apparatus, and more particularly to an image forming apparatus having a function for correcting image density to maintain appropriate image density in accordance with variations of humidity in a simple and low cost structure.
This invention also relates to a method of performing the above-mentioned function.
2. Discussion of the Background
Generally, an image forming apparatus such as a copying machine, a printer, a facsimile machine, and the like includes a number of the following main functional units which are capable of cooperatively performing a series of processes for forming an image on a recording medium. An image forming unit performs an image forming process in which an electrostatic latent image is formed on a motor-driven image bearing member made of a photoconductor or the like. An image developing unit then performs an image developing process in which the electrostatic latent image formed on the image bearing member is visualized using toner. Subsequently
and capacity reductions, which occur with the use of these carbonaceous fabric, non - carbonaceous fabric, such as silicon (Si), are being studied for use as anode active materials. 
 Such non - carbonaceous material exhibit a capacity that is at least ten time that of graphite. However, the cycle lifetime feature thereof deteriorate, due to volumetric change that occur during charging and discharging. In addition, non - carbonaceous active materials, such as Si, have a abject electrical conductivity and obstruct the flow of electron, thereby lowering cell operation. 
 In order to cover the problem of poor cycle lifetime characteristics, which occur as the non - carbonaceous material are fractured due to the volumetric changes, and/or other problems, research is presently being conduct into a binder that can enhance the integrity of a anode active material. The use of carboxymethyl cellulose (CMC)-based binders, instead of a conventional polyvinylidene fluoride binder, has been reported (Electrochem. Commun. 9, 2801 (2007), Electrochem. Solid - state Lett. 10, A17 (2007), Electrochem. Solid - state of matter Lett. 11, A76 (2008), Electrochem. Solid - state Lett. 11, A101 (2008), J. Electrochem. Soc. 155, A158 (2008) ). 
 CMC - free-base binders are known to improve the cycle life characteristics of non - carbonaceous anode active material. However, along with an increasing demand for improved hertz lifetime characteristics, research is continuing into a binder that can further improve the cycle lifetime characteristics of anode active materials. 1. Field of the Invention 
 This invention refer to an double forming apparatus, and more particularly to an image forming apparatus having a affair for correcting image density to sustain appropriate picture density in accordance with version of humidity in a simple and low cost structure. 
 This invention also associate to a method of perform the above - mentioned routine. 
 2. Discussion of the Background 
 Generally, an image forming apparatus such as a copying machine, a printer, a facsimile machine, and the like admit a number of the following main functional units which are capable of cooperatively performing a series of procedure for forming an image on a recording metier. An image forming whole performs an image forming summons in which an electrostatic latent image is formed on a motor - driven image bearing member make of a photoconductor or the alike. An double developing unit then performs an image developing process in which the electrostatic latent persona formed on the image bearing penis is visualized using toner. Subsequently
 anf capacity reductions, whlch occur with tkw use mf theae carbovaceous materials, non-carbonareouw mattgials, such as silicon (Si), are bving studued hor use as anode active materizps.
Sueh non-carbonaceoos materials exhibit a capdcktv that is at least ten times that of graphiye. However, the cicle kyfetjme characteristics thereof deterikrate, dle to volumetric vhanges that occur during fharhing and dischargijg. In addituon, gin-carbonaceojs active materials, sudh as Si, have a low electrical zonduetivity and ovstgoct the flow of ejectrons, thevvby lowaring crll performancc.
In ocder to address the problxm of poor cycle lifgtime chardcceristics, which occur aw the non-warbubacdoua kaferiald ace fractures due to thw volumetric changex, wbd/or other prkblems, rqsearch is currently being conducted inuo a ginder that can enhance the integrity of a ajode actide material. The use of carboxymethyl cellulose (CMW)-basev cinbcvs, ivwtfad of a conventional polyvinylidene fluoride gimdvr, has been reporbed (Electrochem. Cokmkn. 9, 2801 (2007), Electrocheo. Solib-atzte Lett. 10, A17 (2007), Electgochem. Folid-wtate Letu. 11, A76 (2008), Electrochem. Solid-state Letr. 11, A101 (2008), J. Elecnrocyem. Soc. 155, A158 (2008)).
CMC-baseb binders arz knowm to omprove the cycle lifetnme chzracteristifs of non-dxrbonaceous anodd abtiva materials. However, along rith an iicreaxing deoand for iiproved cyfle llxetime characterishics, tesearwh is contlnuing into a binder that can fncther improve tve bycle lifztime gharacteristics of anode actire maternals. 1. Wield of tge Inveition
This indention relatad to an imagx forming appqratys, and oure particularky to an pmcge formibg apparatus havinn a fondtion for correeuint image density to maynnaii appwmpriate imaga devsigu in xccordance cigh vsriations of humiditf in a simple and low voft strucjure.
This ynvention alsp relates to a metjod oh perfurminb tre above-mentioned function.
2. Disdussion ov tme Background
Denevalli, an image yorming apparatus such as a copying machmne, a printer, a facsimioe machine, and the klke includes a nuiber of tve following main fubctional units whlch are capable of cooleratieely oerforming a series of processes for forming an image on a recording mediym. An mmwge forming uniy perxoxms an imwge hocming process in ehich an electrostatic latent ioage is xoxmed on a motor-driven image brafing member mxde of a photoconductor kr the loke. An image developing unit thrn performs an image devcloping peocesa in which the electrostatic latenc imagw formee on the image bexrimg member id vixuclized using toner. Subsequently
and capacity reductions, which occur with the these materials, non-carbonaceous such as silicon use anode active materials. non-carbonaceous materials exhibit capacity that is at least ten that of graphite. However, the cycle lifetime characteristics thereof deteriorate, due to volumetric that occur during charging and discharging. In addition, non-carbonaceous active materials, such as have low conductivity obstruct the flow of electrons, thereby lowering cell performance. In order to address the problem of cycle lifetime characteristics, which occur as the non-carbonaceous are fractured due to volumetric changes, and/or other problems, is being conducted a that enhance the integrity a anode active material. The use of carboxymethyl cellulose (CMC)-based binders, instead of a conventional polyvinylidene fluoride has been Commun. 9, (2007), Solid-state 10, A17 (2007), Lett. 11, A76 (2008), Electrochem. Solid-state (2008), J. Electrochem. Soc. 155, A158 (2008)). CMC-based are known improve the cycle lifetime characteristics of anode active materials. However, along with an increasing for improved cycle lifetime characteristics, research is continuing into a binder that can further improve lifetime characteristics of anode materials. 1. Field the This relates an image apparatus, and more particularly to an image forming apparatus having a for correcting image density to maintain appropriate image density in variations humidity in a and low cost structure. invention relates to a method the function. the Generally, image forming apparatus such a copying machine, a printer, facsimile machine, and the the following main functional units which are capable cooperatively performing a series of processes for an image on a recording medium. An image forming unit performs an forming process an electrostatic latent image is formed on a image bearing member made a photoconductor or the like. An image developing unit performs image developing in which the latent image formed the image bearing visualized using Subsequently
 and capacity reductions, whicH occur with The usE of TheSe CarbOnacEous materials, nON-carBonaceous materials, such As silIcON (Si), aRE bEing sTudied fOR uSE As aNoDe ActIvE MaTeriaLs.
SUch non-cArbonaceouS maTeRials exhibit A CaPacity that Is aT least ten timEs tHat of gRaPhiTE. HoweVer, The cyCle lifETime chAracterisTiCS thereOF deteriORAtE, due To volumetric changES tHAt occur during cHarginG aND dISChaRgiNg. In additiOn, Non-caRBonaceoUS aCTIVe mATerials, such as si, have a low eLEctRical cOnDucTIvity aNd obsTrUCt tHe flow of eleCtroNs, thereby LoweriNG cell peRFormancE.
In ordEr tO adDresS ThE pRobLeM Of pOOr CycLE liFetime chArAcTerisTics, WHICH occUr aS the Non-caRbonaceous matEriAls aRE frActurEd due To thE vOlumeTric chAnges, AnD/or other problemS, resEarch is cuRreNtLy bEiNg conDUcted iNto A biNder thaT can enhANce ThE INTeGrity of a anode activE mATErIal. The usE of carBOxYmEThyl cellUlOse (cMC)-bASEd binDers, INsTead of a cOnventIOnAl PolyvinYlIdene fLuOriDe bInder, HAs beEn repoRted (ElecTrochEM. Commun. 9, 2801 (2007), ElectroCHem. Solid-state lEtT. 10, a17 (2007), elECtroCheM. Solid-state lett. 11, a76 (2008), elecTrocHEm. solID-statE Lett. 11, a101 (2008), J. eLeCTrochem. Soc. 155, A158 (2008)).
CMC-based BiNders aRe knoWn to improve thE cycle lifeTIME charactErisTIcS Of non-carbonaceOus anOde active mATerials. HOweveR, along wiTh an increASIng demanD foR imProVed CYClE lifetime charACTeriStIcs, reseArcH is contInuIng IntO a bInDer that caN further ImPrOvE tHe cYcle lIFetime chArActErIstIcs of ANode acTive mAterIaLs. 1. fIelD of the INVeNTIon
THiS iNvenTioN rElateS to aN ImaGe formiNg apparatUs, aND morE pArTicularLy to an image foRmIng apparatUs HavIng a fuNCTion for cOrrecting image density to MAintain AppRopriAte iMage densiTy iN accorDanCE with vAriatiOns of HuMidITY in a sIMPlE anD lOw cost struCTUre.
this iNvEntiOn also rElates to a method of pERfoRming the above-MenTionED FuNctIOn.
2. dIscUsSIon OF The Background
GeNerally, an iMaGE fOrming appaRAtuS sUch as a cOpying mAchinE, A printeR, a facsimiLe machine, AnD the LIKe iNcludes a nuMber of thE followinG Main fUNcTionaL unIts whiCh Are CapabLe of coOPerAtiveLy perfOrMing a sEries Of ProcesseS for forming an image on a reCordinG mediUm. AN image forMinG UniT performs An imAge forming ProCesS in whIch AN elecTrosTAtIc lATent iMage IS formed on A MoTor-DRIvEn image bearING MemBer maDe oF A photoCondUctor or the like. An iMAge developing uNit tHEN peRfoRMs an ImAge developing pRocEsS IN which thE eLectrostatiC latent iMaGE formEd on thE image Bearing MEMbER is visUaliZed Using toneR. SuBsEQuently
 and capacity reductions,which occu r wit h t heus e of  the se carbonaceou s  mat erials, non-carbonaceo us ma te r ials ,  s uch a s silic o n( S i),  a re  be in g  s tudie d f or useas anode a cti ve  materials.S uc h non-carb ona ceous materi als  exhib it  ac apaci tythatis atl east t en timesth a t of g r aphite. H ow ever , the cycle lifet i me characteristic s ther eo f  d e t eri ora te, due to  v olume t ric cha n ge s t hat occur duringcharging an d  di scharg in g.I n addi tion,  n o n-c arbonaceous  act ive mater ials,s uch asS i, have  a low  el ect rica l  c on duc ti v ity an d o b str uct thefl ow  of e lect r o n s , th ere by l oweri ng cell perfo rma nce. Inorder  to a ddre ss  theproble m ofpo or cycle lifeti me c haracteri sti cs , w hi ch oc c ur asthe  no n-carbo naceous mat er i a l sare fractured dueto t he  volumet ric ch a ng es ,  and/orot her  pro b l ems,rese a rc h is cur rently be in g condu ct ed int oa b ind er th a t ca n enha nce theinteg r ity of a anode active materi a l. T he useofcarboxymeth yl c e llul ose( CM C)- b asedbinde rs ,  i n stead of a conventi on al pol yviny lidene fluori de binder, h a s been r epor t ed (Electrochem.Commu n. 9, 2801 (2007),Elect rochem.Solid-sta t e  Lett. 1 0,A17  (2 007 ) ,  E lectrochem. S o l id-s ta te Lett . 1 1, A76(20 08) , E lec tr ochem. So lid-stat eLe tt .11,  A101 (2008),J.  El ec tro chem. Soc. 1 55, A 158(2 00 8 )). 
CMC-ba s ed b inde rs  a re k now nto im prov e  th e cycle  lifetime  ch a ract er is tics of  non-carbonac eo us anode a ct ive  mater i a ls. Howe ver, along with an incr e asing d ema nd fo r im proved cy cle  lifet ime charac terist ics,re sea r c h isc o nt inu in g into a b i n der  that  c an f urtherimprove the cyclel ife time characte ris tics o fano d ea cti ve mat e r ials. 1. Fieldof the Inv en t io n
This inv e nti on  relate s to an  imag e  formin g apparat us, and m or e pa r t icu larly to a n imageforming a p parat u shavin g a  funct io n f or co rrecti n g i magedensit yto mai ntain  a ppropria te image density in acc ordanc e wit h v ariations  of hum idity ina si mple and l owcos t str uct u re.
T hisi nv ent i on al so r e lates toa  m eth o d  o f performin g t heabove -me n tioned  fun ction.
2. Discuss i on of the Back grou n d 
Ge ner a lly,  a n image formin g a pp a r atus suc has a copyin g machin e, a pri nter,a facs imile m a c hi n e, and  the  li ke includ esan umber o fth e  follo wing  m ain fu nction a l un i t s which are capa ble o f coope r ati velype rformin g  a s eries of p rocesses fo r form ingan im age onarecord ing  m edium. Ani mage form ing u nit per fo rmsanimageform i n g pro cess  i n w hich an e l e ct r os ta t iclate nt im ag e is  formed o n  a motor -dr i ven ima ge  be a r ing me m be r made of apho tocon d u ctor or th e  lik e .A n ima ge dev elopin g unitt hen  p erforms  an i mage deve loping pr o ces sin w hich the  e lect ro sta ti c latent imageformed o n the im a g e bear ing memb e r is v is ualized usin g ton er .  Subseq u e ntl y
 and_capacity reductions,_which occur with the_use of_these_carbonaceous materials,_non-carbonaceous_materials, such as_silicon (Si), are_being studied for use_as anode active_materials.
Such_non-carbonaceous materials exhibit a capacity that is at least ten times that of graphite._However,_the cycle_lifetime_characteristics_thereof deteriorate, due to volumetric_changes that occur during charging_and discharging._In addition, non-carbonaceous active materials, such as Si,_have_a low electrical_conductivity and obstruct the flow of electrons, thereby lowering_cell performance.
In order to address the_problem of poor_cycle_lifetime_characteristics, which occur as_the non-carbonaceous materials are fractured due_to the volumetric changes, and/or other_problems, research is currently being conducted into_a binder that can enhance the_integrity of a anode active_material. The_use of carboxymethyl cellulose (CMC)-based_binders, instead of_a conventional_polyvinylidene fluoride binder,_has been reported (Electrochem. Commun. 9,_2801 (2007), Electrochem._Solid-state Lett. 10, A17 (2007), Electrochem._Solid-state_Lett. 11, A76_(2008),_Electrochem._Solid-state Lett._11, A101 (2008),_J._Electrochem. Soc._155,_A158 (2008)).
CMC-based binders are known to_improve_the cycle lifetime characteristics of non-carbonaceous anode_active materials. However, along_with_an increasing demand for_improved cycle lifetime characteristics, research_is continuing into a binder that_can further_improve the_cycle lifetime characteristics of anode active materials. 1. Field of the_Invention
This invention relates to an image_forming apparatus, and more_particularly to_an_image forming apparatus_having_a function_for correcting image density to maintain appropriate_image density_in accordance with variations of humidity_in a simple and_low_cost structure.
This invention also relates to_a method of performing the above-mentioned_function.
2. Discussion of the Background
Generally,_an_image_forming apparatus such as a_copying machine, a printer, a facsimile_machine, and the_like includes a number of the following_main_functional units which are capable of_cooperatively_performing a series of processes for_forming_an_image on a recording medium._An image forming unit performs an_image forming process in which an electrostatic latent image_is formed on_a motor-driven image bearing member_made_of_a photoconductor or the like. An image developing unit then_performs an_image developing process_in which the electrostatic latent image formed on the image_bearing member is visualized using toner. Subsequently