Flicker的深入探讨

,Flicker的深入探討1,Flicker現象說明2,FeedThrough漏電現象2,FrameInversion3,LineInversion(RowandColumn)4,DotInversion5,DualLineDotInversion(2V1H)andNewInversion1+2V1H6,PatterninWindows2000關機畫面andDMWTestPattern,Flicker現象說明,Flicker成因:1,若第一個畫面亮,第二個畫面暗,持續交替,則人眼會感覺畫面有閃爍現象2,LCD以電壓大小來控制液晶站起來的角度達到亮度調整,且液晶須以交流方式驅動,若Vcom未調好,V+V-,V+會較暗(NormalWhite),會有Flicker現象,V-Sync,FrameN,FrameN+1,RowInversion,1,FrameInversion容易產生Flicker,因此發展出LineInversion2,LineInversion有兩種:RowInversion和ColumnInversion3,RowInversion在同一個畫面中有V+及V-產生畫面均化現象,故可解決Flicker現象,但會產生Hor.Crosstalk,RowInversion造成Hor.Crosstalk,FrameN,FrameN+1,亮度=(V+)+(V-)/2,亮度=(V+)+(V-)/2,ColumnInversion造成Ver.Crosstalk,FrameN,FrameN+1,ColumnInversion在同一個畫面中有V+及V-產生畫面均化現象,也可以解決Flicker現象,但會產生Ver.Crosstalk,ColumnInversion,亮度=(V+)+(V-)/2,亮度=(V+)+(V-)/2,DotInversion,1,由於FrameInversion會有Flicker,LineInversion會有Crosstalk2,為解決Flicker和Crosstalk,而發展出DotInversion3,由於TFT-LCD製程上無法準確做到各相關電容值(寄生電容)均相同,會造成各個Pixel亮度不均,調整Vcom只能以中間畫面為主,FrameN,FrameN+1,亮度=(V+)+(V-)/2,亮度=(V+)+(V-)/2,FrameN,FrameN+1,1,下圖為Flicker檢查畫面,白色部分為亮點,黑色部分為暗點2,若Vcom未調好,則在此檢查畫面下最容易看出Flicker現象,但因TFT製程關係,無法將每個TFT做的都相等,調整時只能針對中間區域來調整3,缺點是可能會產生斜紋Mura,DotInversion,FrameN亮點均為V+,FrameN亮點均為V-,DotInversion雖可解決Flicker和Crosstalk現象,但在某些作業系統(Windows98/Windows2000等)的關機畫面,在有些背景,如淡綠畫面(1/2Dotlight)下也會有Flicker現象,FrameN均為V-,FrameN+1均為V+,DotInversion,為解決Windows關機(淡綠畫面)Flicker現象,發展出2V1H驅動方式,每個Frame均有V+,V-可均化亮度,DualLineDotInversion(2V1H),為解決Windows關機(淡綠畫面)Flicker現象,發展出2V1H驅動方式,Flicker,DualLineDotInversion(2V1H),Flicker,為解決Windows關機(淡綠畫面)Flicker現象,發展出2V1H驅動方式,DualLineDotInversion(2V1H),Flicker,NoFlicker,Pattern:2V1H灰階PanelDriver:1+2V1H,Pattern:2V1H灰階PanelDriver:2V1H2V1HDriverVcom調整用(SignalLever=L127)人眼對暗態光線的變化比較敏銳L127,亮度=(V+)+(V-)/2,FrameN亮點均為V+無均化,DualLineDotInversion(2V1H),Pattern:2V1H灰階PanelDriver:1+2V1H,Pattern:2V1H灰階PanelDriver:2V1H2V1HDriverVcom調整用(SignalLever=L127)人眼對暗態光線的變化比較敏銳L127,亮度=(V+)+(V-)/2,FrameN亮點均為V+無均化,DualLineDotInversion(2V1H),Pattern:1+2V1H灰階DMWPixelTackingandTiming-LockTestPanelDriver:1+2V1H,FrameN亮點均為V+無均化,Pattern:1+2V1H灰階DMWPixelTackingandTiming-LockTestPanelDriver:2V1H,亮度=(V+)+(V-)/2,DMWDotPattern(Windows關機畫面)NewDriver須視新作業系統Vista而定PanelDriver:2V1H,DMWDotPattern(Windows關機畫面)NewDriver須視新作業系統Vista而定PanelDriver:1+2V1H,亮度=(V+)+(V-)/2,亮度=(V+)+(V-)/2,DMWDotPattern(Windows關機畫面)NewDriver須視新作業系統Vista而定PanelDriver:2V1H,DMWDotPattern(Windows關機畫面)NewDriver須視新作業系統Vista而定PanelDriver:1+2V1H,Pattern:1+2V1H/4dotsDMWChroma/LumaInterferencePanelDriver:1+2V1H,RGB成ColumnInversion,Pattern:1+2V1H/4dotsDMWChroma/LumaInterferencePanelDriver:2V1H,亮度=(V+)+(V-)/2,Pattern:1Dot/3DotsDM