Kushanda kwenguva refu kweLEDzvichakonzera kuchembera, kunyanya kune yakakwirira-simbaLED, dambudziko rekuora kwechiedza rinonyanya kuipa.Pakuyera hupenyu hwe LED, hazvina kukwana kutora kukuvadzwa kwechiedza semagumo ehupenyu hwekuratidzira LED.Zvinonyanya kukosha kutsanangura hupenyu hwekutungamirwa nechiedza chekudzivirira chikamu che LED, senge 5% kana 10%.

Kuora kwechiedza: painochaja pamusoro peiyo photosensitive dhiramu, nekuunganidzwa kwemutero pamusoro peiyo photosensitive dhiramu, iyo inogona zvakare inowedzera, uye pakupedzisira inosvika "saturation" inogona, iyo ndiyo yakanyanya kugona.Kugona kwepamusoro kuchaderera nekufamba kwenguva.Kazhinji, simba rekushanda rakaderera pane izvi zvingaita.Iyo nzira iyo iyo inogoneka inodzikira nekufamba kwenguva inonzi "dark decay" process.Kana iyo photosensitive drum inotariswa uye yakafumurwa, kugona kwenzvimbo ine rima (pamusoro peiyo photoconductor isina kuvhenekerwa nechiedza) ichiri munzira yekuora kwakasviba;Munharaunda inopenya (pamusoro peiyo photoconductor yakavhenekerwa nechiedza), iyo inotakura density mufotoconductive layer inowedzera nekukurumidza, iyo conductivity inowedzera nekukurumidza, uye iyo photoconductive voltage inoumbwa, iyo charge inonyangarika nekukurumidza, uye kugona kwepamusoro kwephotoconductor zvakare. inoderera nokukurumidza.Inonzi "chiedza kuderera" uye inononoka pakupedzisira.