Cov zaub zoo ntawm LED zaub yeej ib txwm muaj feem cuam tshuam nrog cov tsav tam sim no nti, xws li ghosting, tuag pixel cross, qis grey cam khwb cia, tsaus thawj scan, siab sib txuas, thiab lwm yam, thiab kab tsav ib txwm ua tau yooj yim. scanning yuav tsum tau.Nco ntsoov ntau dhau.Nrog rau kev tsim cov suab me me, LED cov ntxaij vab tshaus tseem muab cov kev xav tau siab dua rau kev tsav tsheb, los ntawm P-MOSFET ntshiab kom paub txog kev hloov kab, mus rau kev sib koom ua ke ntau dua thiab muaj zog ntau txoj kev tsav tsheb.Kev tsim thiab xaiv cov kab tsav tsheb kuj tseem ntsib rau 6 qhov kev sib tw loj xws li kev tshem tawm dab, lub teeb hlaws rov qab voltage, luv luv Circuit Court caterpillar, qhib ntoo khaub lig, lub teeb hlaws VF tus nqi loj heev, thiab qhov sib txawv siab sib txuas.
Dab
Thaum lub scan screen hloov, nws yuav siv sij hawm ib lub sij hawm rau lub PMOS hloov mus rau qhib thiab tawm thiab tus nqi paug ntawm tus kab mob parasitic capacitance Cr ntawm kab kab.Yog li ntawd, nyob rau lub sijhawm thaum VLED thiab OUT tau qhib rau hauv kab tom ntej, tus nqi tsis tau tso tawm ntawm VLED hauv kab dhau los yog Txoj kev coj ua.Thaum Row(n) qhib, kab kab kab mob Cr raug them rau VCC peev xwm.Thaum hloov mus rau Kab (n + 1), muaj peev xwm sib txawv ntawm Cr thiab OUT, thiab tus nqi raug tso tawm los ntawm lub teeb hlaws, ua rau lub teeb ci ntsa iab.
Yog li ntawd, tus nqi ntawm Cr yuav tsum tau tso tawm ua ntej thaum lub sijhawm hloov kab.Feem ntau, ib txoj kab uas muaj kev sib xyaw ua ke ua haujlwm tuaj yeem tso tawm tus nqi ntawm cov kab mob cab cab Cr thaum hloov pauv los ntawm kev ntxiv lub voj voog rub-down.Qhov qis dua qhov muaj peev xwm rub-down, uas yog, qhov qis dua qhov blanking voltage VH, qhov ceev ntawm cov cab cab capacitance yuav raug tso tawm, thiab qhov zoo dua ntawm kev tshem tawm cov duab dab.Feem ntau, VH Teeb hlaws rov qab voltage
Qhov rov qab impulse voltage ntawm lub teeb hlaws zoo heev cuam tshuam rau lub neej kev pab cuam ntawm lub teeb hlaws.Cov tuag pixels tshwm sim los ntawm lub siab rov qab ib txwm yog qhov mob ntawm LED zaub, tshwj xeeb tshaj yog lub suab me me.
Thaum cov zis channel raug kaw, tus kab mob parasitic capacitance ntawm cov channel yuav raug them tas mus li vim muaj kev cuam tshuam ntawm cov kab mob parasitic inductance, ua rau muaj kev kub ntxhov ntau heev.Lub sij hawm no, nws tsim ib qho hluav taws xob rov qab loaded ntawm lub teeb hlaws nrog cov zis ntawm cov kab raj, yog li qhov blanking voltage ntawm kab raj cuam tshuam rau qhov rov qab voltage ntawm lub teeb hlaws tib lub sijhawm.Thaum lub voltage ntawm qhov tam sim no tso zis channel yog tsau, qhov siab dua qhov blanking voltage ntawm kab raj, qhov me dua qhov rov qab voltage ntawm lub teeb hlaws.Feem ntau qhov nominal rov qab voltage ntawm lub teeb hlaws yog 5V.Qhov tseeb tau sim los ntawm cov chaw tsim khoom, lub nraub qaum siab hauv qab 1.4V tuaj yeem txo cov pixels tuag los ntawm lub nraub qaum.Yog li, qhov blanking voltage tsis tuaj yeem qis dhau rau lub teeb hlaws rov qab teeb meem.Tsis qis dua VCC-2V.
Short circuit kab ntsig
Thaum lub LED yog luv luv, yuav muaj ib tug ntev ci tshwm sim, uas yog feem ntau hu ua ib tug luv luv-circuit caterpillar.Thaum lub teeb ci LED hlaws hauv nruab nrab yog luv luv, LED teeb hlaws hauv tib kem yuav tsim ib txoj hauv kev raws li qhia hauv daim duab hauv qab no thaum luam mus rau kab.Yog tias qhov sib txawv ntawm qhov sib txawv ntawm VLED thiab point A yog ntau dua li cov teeb pom kev zoo ntawm LED teeb hlaws, ib kem ib txwm yuav tsim.Ci kab ntsig.
Qhov loj tshaj qhov sib txawv ntawm lub luv luv-circuit caterpillar thiab qhib ntoo khaub lig yog tias ntev npaum li qhov screen nyob rau hauv lub scanning lub xeev, lub short-circuit caterpillar yuav tshwm tsis hais seb lub LED teeb hlaws dai qhia ib tug duab, thiab qhib-circuit caterpillar. yuav tsuas muaj qhov teeb meem qhib qhib thaum qhib lub teeb hlaws tau teeb.Feem ntau los ntawm kev nce cov kab hluav taws xob blanking voltage, qhov sib txawv ntawm qhov hluav taws xob tsawg dua li LED rau pem hauv ntej voltage VF, uas yog, VLED-VHVCC-1.4V tuaj yeem daws qhov teeb meem luv luv ntawm kab ntsig.Thaum VCC-2V