Umgangatho wokuboniswa komboniso we-LED ubusoloko unxulumene ngokusondeleyo kwi-chip ye-drive yangoku, efana ne-ghosting, umnqamlezo we-pixel efileyo, i-low grey cast, i-scanner yokuqala emnyama, ukudityaniswa okuphezulu, njl., kunye ne-line drive ibisoloko ilula. imfuno yokuskena.Ingqalelo kakhulu.Ngophuhliso lwesandi esincinci, izikrini zokubonisa i-LED zikwabeka phambili iimfuno eziphezulu zokuqhuba umqolo, ukusuka kwi-P-MOSFET esulungekileyo ukuqonda ukutshintshwa kwemiqolo, ukuya ekudityanisweni okuphezulu kunye nokuqhubela phambili kwemisebenzi emininzi.Uyilo kunye nokukhethwa kwabaqhubi beentambo kukwajongene nemiceli mngeni emithandathu enjengokuphelisa isiporho, umbane obuyela umva amaso wesibane, umbungu omfutshane wesekethe, umnqamlezo ovulekileyo, ixabiso lesibane le-VF likhulu kakhulu, kunye nokudibanisa okuphezulu.
Isiporho
Xa isikrini sokuskena sitshintshiwe, kuthatha ixesha ukuba i-PMOS itshintshe kwaye ivule kwaye ikhuphe intlawulo kwi-parasitic capacitance Cr yomgca womgca.Ngoko ke, ngeli xesha xa i-VLED kunye ne-OUT zivuliwe kumgca olandelayo, intlawulo engavumelekanga ye-VLED kumgca wangaphambili yiNdlela yokuqhuba.Xa uRow(n) uvuliwe, umqolo weparasitic capacitance Cr uhlawuliswa kwiVCC enokubakho.Xa utshintshela kwi-Row (n + 1), umahluko onokuthi uqulunqwe phakathi kwe-Cr kunye ne-OUT, kwaye intlawulo ikhutshwe ngeentsimbi zesibane, okukhokelela ekukhanyeni kwe-LED.
Ke ngoko, intlawulo kwi-Cr kufuneka ikhutshwe kwangaphambili ngexesha lokutshintsha komgca.Ngokuqhelekileyo, ityhubhu yomgca kunye nomsebenzi odibeneyo wokuvala iyakwazi ukukhupha ngokukhawuleza umrhumo we-parasitic capacitor Cr xa ukutshintshwa kwenziwa ngokudibanisa isiphaluka sokutsala.Okona kusezantsi amandla okutsalela phantsi, oko kukuthi, i-voltage ephantsi ye-VH, kokukhona intlawulo kwi-capacitance ye-parasitic iya kukhutshwa, kwaye ngcono isiphumo sokuphelisa imifanekiso yesiporho.Ngokubanzi, i-VH Lamp bead reverse voltage
I-voltage ye-impulse eguqukayo yamaso wesibane ichaphazela kakhulu ubomi benkonzo yamaso wesibane.Iipikseli ezifileyo ezibangelwa uxinzelelo lwangasemva ziye zahlala zibuhlungu kwiimpawu ze-LED, ngakumbi i-pitch encinci.
Xa i-output channel ivaliwe, i-parasitic capacitance kwitshaneli iya kuhlawuliswa ngokuqhubekayo ngenxa yempembelelo ye-freewheeling ye-inductance ye-parasitic, eyenza i-glitch ephezulu kakhulu yombane.Ngeli xesha, yenza i-voltage eguqukayo elayishwe kwi-bead yesibane kunye nokuphuma kwetyhubhu yomgca, ngoko ke i-voltage engenanto yetyhubhu yomgca ichaphazela i-voltage eguqukayo ye-bead yesibane ngexesha elifanayo.Xa i-voltage kwi-channel yemveliso eqhubekayo imisiwe, iphezulu i-voltage engenanto yetyhubhu yomgca, incinci i-voltage ejikelezayo ye-bead yesibane.Ngokuqhelekileyo i-nominal reverse voltage ye-bead yesibane yi-5V.Ngokwenyani ivavanywe ngumenzi, uxinzelelo lwangasemva olungaphantsi kwe-1.4V lunokunciphisa kakhulu iipikseli ezifileyo ezibangelwa luxinzelelo lwangasemva.Ke ngoko, i-voltage engenanto ayinakuba sezantsi kakhulu kwingxaki yoxinzelelo lwebead yesibane.Hayi ngaphantsi kwe VCC-2V.
Umbungu wesiphaluka esifutshane
Xa i-LED ifutshane-ijikelezwe, kuya kubakho into eqaqambileyo ende, ebizwa ngokuba yi-caterpillar emfutshane.Xa i-bead yesibane se-LED phakathi i-short-circuited, i-bead yesibane se-LED kwikholamu efanayo iya kwenza indlela njengoko kubonisiwe kumfanekiso ongezantsi xa uskena kumqolo.Ukuba umehluko woxinzelelo phakathi kwe-VLED kunye ne-point A inkulu kunexabiso lokukhanyisa isibane sesibane se-LED, ikholamu eqhelekileyo iya kwenziwa.Umbungu oqaqambileyo.
Umahluko omkhulu phakathi kombungu omfutshane kunye nomnqamlezo ovulekileyo kukuba nje ukuba isikrini sikwimeko yokuskena, umbungu omfutshane-yesekethe uya kubonakala kungakhathaliseki ukuba i-bead yesibane se-LED ibonisa umfanekiso, kunye nombungu ovulekileyo. iya kuba nengxaki yomnqamlezo ovulekileyo kuphela xa intsimbi yesibane evuliweyo ilayitiwe.Ngokuqhelekileyo ngokunyusa i-voltage ye-tube yokuvala i-voltage, i-voltage ye-voltage incinci kune-LED yangaphambili yombane we-VF, oko kukuthi, i-VLED-VHVCC-1.4V inokusombulula ngokupheleleyo ingxaki ye-caterpillar ye-short-circuit.Xa VCC-2V