Ikhwalithi yokubonisa yesibonisi se-LED ibilokhu ihlobene eduze ne-chip yedrayivu eqhubekayo yamanje, efana nesipoki, isiphambano se-pixel esifile, ukusakaza okumpunga okuphansi, ukuskena kokuqala okumnyama, ukuhlanganisa okugqamile, njll., kanye nokushayela komugqa bekulokhu kulula. imfuneko yokuskena.Ukunaka kakhulu.Ngokuthuthukiswa kwephimbo elincane, izikrini zokubonisa ze-LED ziphinde zibeke phambili izidingo eziphakeme zokushayela amarowu, kusukela ku-P-MOSFET ehlanzekile ukuze kubonakale ukushintsha kwemigqa, ukuya ekuhlanganisweni okuphezulu kanye nokushayela kwemigqa okunamandla amaningi.Idizayini nokukhetha abashayeli bezintambo kuphinde kubhekane nezinselelo ezinkulu eziyisithupha ezifana nokuqedwa kwesipoki, amandla kagesi e-lamp bead reverse, isibungu sesekethe esifushane, isiphambano esivulekile, ubuhlalu belambu bevelu ye-VF bukhulu kakhulu, kanye nokuhlangana okuphezulu kokugqama.
Isipoki
Uma isikrini sokuskena sishintshwa, kuthatha isikhashana ukuthi iswishi ye-PMOS ivulwe futhi ivalwe kanye nokukhipha ukushaja kumthamo we-parasitic capacitance Cr womugqa womugqa.Ngakho-ke, okwamanje lapho i-VLED ne-OUT zikhanyiswa emugqeni olandelayo, inkokhiso engakhishiwe ye-VLED emugqeni odlule i-The conduction path.Uma Umugqa(n) uvuliwe, umugqa we-parasitic capacitance Cr ukhokhiswa amandla e-VCC.Uma ushintshela ku-Row(n+1), kwakheka umehluko ongaba khona phakathi kwe-Cr ne-OUT, futhi ukushaja kukhishwa ngobuhlalu besibani, okuholela ekukhanyeni kwe-LED okufiphele.
Ngakho-ke, inkokhiso ku-Cr idinga ukukhishwa kusenesikhathi ngesikhathi sokushintsha ulayini.Ngokuvamile, ishubhu yomugqa enomsebenzi ohlanganisiwe wokuvala ingakhipha ngokushesha ukushaja kwe-parasitic capacitor Cr lapho ukushintshwa kwenziwa ngokwengeza isekethe yokudonsela phansi.Lapho amandla okudonsela phansi ephansi, okungukuthi, i-voltage evaliwe i-VH iyancipha, ukushaja kwe-parasitic capacitance kuzokhishwa ngokushesha, futhi kuba ngcono umphumela wokuqeda izithombe eziyisipoki.Ngokuvamile, i-VH Lamp bead reverse voltage
I-voltage ye-impulse reverse yobuhlalu besibani ithinta kakhulu impilo yesevisi yobuhlalu besibani.Amaphikseli afile abangelwa ingcindezi yangemuva abelokhu eyizindawo zobuhlungu zesibonisi se-LED, ikakhulukazi iphimbo elincane.
Uma umzila ophumayo uvaliwe, amandla e-parasitic esiteshini azokhokhiswa ngokuqhubekayo ngenxa yomphumela we-freewheeling we-inductance ye-parasitic, okwenza i-glitch ephezulu kakhulu ye-voltage.Ngalesi sikhathi, yenza i-voltage ehlehlayo elayishwe kubuhlalu besibani ngokuphuma kweshubhu lomugqa, ngakho-ke i-voltage engenalutho yeshubhu yomugqa ithinta i-voltage ehlehlayo yobuhlalu besibani ngesikhathi esifanayo.Uma i-voltage esiteshini esiphumayo esiqhubekayo isilungisiwe, ukuphakama kwe-voltage engenalutho yeshubhu lomugqa, iba mancane i-voltage ehlehlayo yobuhlalu besibani.Ngokuvamile i-voltage ye-reverse ye-reverse yobuhlalu besibani ngu-5V.Empeleni ihlolwe umenzi, ingcindezi yangemuva engaphansi kuka-1.4V inganciphisa kakhulu amaphikseli afile abangelwa ukucindezela emuva.Ngakho-ke, i-voltage engenalutho ayikwazi ukuba ngaphansi kakhulu enkingeni yokucindezela emuva kobuhlalu belambu.Hhayi ngaphansi kwe-VCC-2V.
Isibungu esifushane
Uma i-LED ine-short-circuited, kuzoba khona into ende ekhanyayo, ngokuvamile ebizwa ngokuthi i-short-circuit caterpillar.Uma ubuhlalu belambu le-LED phakathi nendawo bufushane, ubuhlalu besibani se-LED obukukholomu efanayo buzokwakha indlela njengoba kukhonjisiwe kumfanekiso ongezansi lapho uskenela umugqa.Uma umehluko wengcindezi phakathi kwe-VLED nephoyinti A mkhulu kunevelu yokukhanyisa yobuhlalu besibani se-LED, kuzokwakhiwa ikholomu evamile.Isibungu esikhanyayo.
Umehluko omkhulu phakathi kwesibungu esifushane kanye nesiphambano esivulekile ukuthi inqobo nje uma isikrini sisesimweni sokuskena, kuzovela isibungu esifushane kungakhathaliseki ukuthi ubuhlalu besibani se-LED sibonisa isithombe, kanye nesibungu esivulekile. kuzoba nenkinga yesiphambano esivulekile kuphela lapho ubuhlalu besibani obuvulekile bukhanyisiwe.Ngokujwayelekile ngokwandisa i-voltage evala ishubhu kalayini, umehluko we-voltage mncane kune-LED voltage forward VF, okungukuthi, i-VLED-VHVCC-1.4V ingaxazulula ngokuphelele inkinga yesibungu esifushane.Lapho i-VCC-2V