Boleng ba pontšo ea LED bo 'nile ba amana haufi-ufi le chip ea koloi e sa khaotseng, e kang ghosting, dead pixel cross, low grey cast, lefifi la pele la ho hlahloba, ho kopanya ho fapaneng haholo, joalo-joalo,' me mohala oa mohala esale e le mokhoa o bonolo. tlhokahalo ea ho lekola.Tlhokomelo e ngata haholo.Ka nts'etsopele ea molumo o monyenyane, li-skrini tsa LED li boetse li fana ka litlhoko tse phahameng tsa ho khanna ka mela, ho tloha ho P-MOSFET e hloekileng ho lemoha ho fetola mela, ho kopanya holimo le ho khanna ka mela e mengata e matla haholoanyane.Moralo le khetho ea bakhanni ba lithapo le tsona li tobane le liqholotso tse kholo tse tšeletseng tse kang ghost elimination, lamp bead reverse voltage, short circuit popane, open cross, lamp bead VF value e kholo haholo, le coupling e phahameng haholo.
Sepoko
Ha skrine ea scan e ntse e fetoloa, ho nka nakoana hore sesebelisoa sa PMOS se buloe le ho tima le ho ntša tefiso ho parasitic capacitance Cr ea mola oa mola.Ka hona, nakong eo VLED le OUT li buloang moleng o latelang, tefiso e sa lefelloeng ea VLED moleng o fetileng ke Tsela ea ho khanna.Ha Row(n) e buletsoe, mohala oa parasitic capacitance Cr o lefisoa ho bokhoni ba VCC.Ha u fetohela ho Row(n+1), phapang e ka bang teng e thehoa pakeng tsa Cr le OUT, 'me tefiso e lokolloa ka lifaha tsa lebone, e leng se hlahisang leseli le lerootho la LED.
Ka hona, tefiso ho Cr e hloka ho lokolloa esale pele ka nako ea phetoho ea mohala.Ka kakaretso, tube ea mohala e nang le ts'ebetso e kopantsoeng ea ho koala e ka ntša ka potlako tefiso ea parasitic capacitor Cr ha ho fetoha ho etsoa ka ho eketsa potoloho ea ho hula.E ka tlaase ho hula-fatše bokgoni, ke hore, ka tlaase ho blanking gagamalo VH, ka lebelo lefiso ka capacitance parasitic tla lokolloa, 'me molemo phello ea ho felisa litšoantšo tsa moea.Ka kakaretso, VH Lamp bead reverse voltage
The reverse impulse voltage ea lifaha tsa lebone e ama haholo bophelo ba ts'ebeletso ea lifaha tsa lebone.Lipikselse tse shoeleng tse bakoang ke khatello ea morao e 'nile ea e-ba lintlha tse bohloko tsa pontšo ea LED, haholo-holo molumo o monyenyane.
Ha mocha oa tlhahiso o koetsoe, capacitance ea parasitic seteisheneng e tla lula e lefisoa ka lebaka la phello ea freewheeling ea inductance ea parasitic, e etsang hore ho be le glitch e phahameng haholo.Ka nako ena, e bopa reverse voltage imetsoeng holim'a lebone sefaha ka tlhahiso ea mola tube, kahoo blanking gagamalo ea mola tube ama reverse gagamalo ea lebone sefaha ka nako e tšoanang.Ha motlakase oa mocha o sa khaotseng oa tlhahiso o tsitsitse, matla a se nang letho a lebone la lebone a phahame, 'me matla a ka morao a lebone a fokotseha.Hangata, motlakase o ka morao oa lebone ke 5V.Ha e le hantle e lekoa ke moetsi, khatello ea morao e ka tlase ho 1.4V e ka fokotsa haholo lipikselse tse shoeleng tse bakoang ke khatello ea morao.Ka hona, motlakase o se nang letho o ke ke oa ba tlase haholo bakeng sa bothata ba khatello ea mokokotlo oa lebone.E seng ka tlase ho VCC-2V.
Popane e khutšoanyane ea potoloho
Ha LED e le khutšoanyane, ho tla ba le ketsahalo e telele e khanyang, eo ka kakaretso e bitsoang popane e khutšoanyane.Ha lebone la lebone la LED le bohareng le le khuts'oane, lebone la lebone la lebone la LED le ka har'a kholomo e le 'ngoe le tla theha tsela joalokaha ho bontšitsoe setšoantšong se ka tlase ha se hlahloba mola.Haeba phapang ea khatello pakeng tsa VLED le ntlha ea A e kholo ho feta boleng ba khanya ea lebone la lebone la LED, ho tla thehoa kholomo e tloaelehileng.Seboko se kganyang.
Phapang e kholo ka ho fetisisa pakeng tsa popane e khutšoanyane le sefapano se bulehileng ke hore ha feela skrine e ntse e le sebakeng sa ho hlahloba, popane e khutšoanyane e tla hlaha ho sa tsotellehe hore na lebone la lebone la LED le bontša setšoantšo, le popane e bulehileng. e tla ba le bothata ba sefapano se bulehileng ha sefaha sa lebone se bulehileng se bonesitsoe.Hangata ka ho eketsa moleng tube blanking gagamalo, phapano ya gagamalo ke e nyenyane ho feta LED pele gagamalo VF, ke hore, VLED-VHVCC-1.4V ka ka ho feletseng rarolla bothata khutšoanyane-potoloho popane.Ha VCC-2V