TN LCD vs FSTN LCD Technology
Tso lus
TN LCD (Twist Nematic Liquid Crystal Display) yog hom qub tshaj plaws ntawm LCD zaub technologies uas muag hauv khw. Nws ua tiav kev vam meej thiab nyiam thoob ntiaj teb kev txaus siab hauv kev txhim kho LCD zaub technology. Nws tseem yog nyob rau hauv loj scale ntau lawm hnub no, feem ntau rau tus lej (seg) zaub. Thov saib qhov txuas hauv qab no kom paub ntau ntxiv txog kev taw qhia tob of TN LCD
Fig. 1 Ib qho piv txwv ntawm TN LCD iav vaj huam sib luag
TN LCD tuaj yeem siv los ua cov qauv duab zoo lossis tsis zoo. Hom zoo yog cov cim dub ntawm grey keeb kwm yav dhau, thaum hom tsis zoo yog cov cim grey ntawm keeb kwm dub
Nws yog tus nqi qis, tab sis saib lub kaum sab xis thiab qhov sib piv tsis zoo. Nws tsis tuaj yeem tsav high multiplex daim ntawv thov. TN LCDs feem ntau yog siv rau daim ntawv thov hauv qab ¼ lub luag haujlwm. Qee cov neeg siv khoom nruj tsis txaus siab txog "dab ntxwg nyoog" ntawm TN zaub ntawm ¼ lub luag haujlwm, yog li ntawd, kev txhim kho me ntsis HTN LCD (Highly Twist Nematic) yog siv. Rau qee qhov kev siv nyiaj ntau heev, TN LCD tuaj yeem siv tau txog 1/16 lub luag haujlwm. Tab sis feem ntau ntawm cov ntawv thov dhau 1/8 multiplex, cov neeg siv khoom xaiv STN lossis FSTN LCDs.
FSTN LCD Technology Taw Qhia
FSTN LCDs (Film Compensated Super-Twisted Nematic) yog ib yam ntawm STN (Super-Twisted Nematic) LCDs FSTN LCD muaj ib zaj duab xis retardation nrog polarizer siv rau STN zaub. Cov yeeb yaj kiab retardation yog siv los them cov xim daj ntsuab ntsuab ntawm STN LCD zaub los tsim cov xim dub thiab dawb, uas yog qhov yuav tsum tau tsim cov xim xim. Nws kuj yog ib qho monochrome LCD zaub tab sis nws muaj qhov sib txawv siab dua thiab pom dav dua li TN zaub. FSTN cov zaub muaj qhov sib txawv ntau dua thiab pom dav dua. Lawv zoo txaus los siv txog li 1/240 daim ntawv thov daim duab LCD. Vim tias nws yog xim dub / lub sijhawm, lawv tuaj yeem siv rau CSTN (Color STN) tom qab siv lub lim xim RGB. Tab sis nws kim dua TN LCD. FSTN LCD kuj yog hom monochrome zaub uas muaj ob hom zoo thiab tsis zoo. Nrog kev tsim khoom zoo, lub pixel loj tuaj yeem ua me me li 0.08mm.
Daim duab 2 Zoo TN LCD
Daim duab 3 Negative TN LCD
Qhov sib txawv ntawm FSTN thiab TN LCD Technologies
- - Qauv: TN LCD twists 90 degree, FSTN LCD twist 180 txog 270 degree.
- - Cov ntaub ntawv siv lead ua kua: Ob leeg siv cov ntaub ntawv nematic LC tab sis FSTN kua muaj cov khoom siv tshuaj lom neeg ntau dua hauv nws txhawm rau pab nws cov molecular mus rau qib siab dua.
- Kev taw qhia txheej: TN LCD siv tau ib txwm polyimide thaum FSTN LCD yuav tsum siv tshwj xeeb high pretilt polyimide.
- - Qhov sib piv sib piv: FSTN LCD muaj cov duab zoo dua li TN LCD tshwj xeeb tshaj yog ntawm daim ntawv thov ntau dua.
- - Saib lub kaum ntse ntse: FSTN LCD muaj qhov pom dav dav zoo dua li TN LCD tshwj xeeb tshaj yog ntawm daim ntawv thov ntau dua. TN LCD muaj qhov pom kev tsis muaj zog, yog vim li cas peb yuav tsum tau txhais 6 lossis 12 teev saib lub kaum ntse ntse. Tab sis FSTN LCD tuaj yeem pom meej los ntawm txhua qhov kev pom.
- - Lub sij hawm teb: Ntawm FSTN LCD muaj lub kaum ntse ntse dua, nws yuav siv sij hawm ntau dua los hloov pauv. Nws muaj lub sij hawm teb ntev dua los yog cov lus teb qeeb dua li TN LCD.
- - Kev Ua Haujlwm Kub Kub: Vim tias cov lus teb qeeb heev thiab cov xim tom qab hloov pauv rau FSTN LCDs ntawm qhov kub thiab txias, FSTN LCDs tsuas yog siv tau li ntawm -20oC rau +70 oC, tab sis TN LCDs tuaj yeem siv nrog { {2}} oC rau +90 oC uas tuaj yeem siv tau yooj yim rau kev siv sab nraum zoov. FSTN LCD teb ceev hauv qhov chaw txias heev tuaj yeem txhim kho los ntawm kev ntxiv lub rhaub. FSTN LCD xim hloov ntawm qhov kub thiab txias tuaj yeem daws tau los ntawm kev ntxiv cov nyiaj rov qab kho qhov muag raws li DSTN (Double STN), tab sis tus nqi yuav ntau dua ob npaug.
- - Kev siv hluav taws xob: Raws li kev xav, FSTN thiab TN LCDs yuav tsum haus tib theem ntawm lub zog. Tab sis FSTN LCDs feem ntau yog siv rau siab multiplex daim ntawv thov, lawv siv ntau zaus tsav thiab lawv cov LCD controllers thiab cov tsav tsheb ib txwm haus ntau zog tshaj TN LCDs. Thaum muaj kev xav dav dav, TN siv ntau lub zog tsawg dua li STN lossis FSTN LCD zaub.
- - Tus nqi: FSTN cov duab yog kwv yees li 50% lossis 100% kim dua TN Displays.
- - Kev sib dhos (Display Module): Vim tias feem ntau ntawm TN cov duab muaj kev sib cuag tsawg dua, nws tuaj yeem siv tus pins, zebra, FPC (Flex Printed Circuit) los ua kev sib txuas. Thaum sib sau ua ke hauv LCD modules, feem ntau COB (Chip on Board) yog siv. Thaum FSTN cov lus qhia muaj kev sib cuag ntau dua, kev ua haujlwm siab thiab kev sib dhos ntau dua yuav tsum tau siv. COG (Chip on Glass) ua tau zoo vim nws tus nqi qis thiab sib xws rau cov khoom ntim siab.
- - Backlight: Ob lub TN LCDs thiab FSTN LCDs tsis tuaj yeem tawm lub teeb rau lawv tus kheej. Lawv xav tau backlight thiaj li pom nyob rau hauv qhov chaw dim.
- - Sunlight Readable: Nws yog qhov zoo dua rau ob qho tib si TN thiab FSTN LCD. Los ntawm kev siv lub reflective lossis transflective polarizer nyob tom qab ntawm LCD, lub siab sib txawv tuaj yeem ua tiav hauv qab hnub ci.
- - Kev sib tw hauv kev ua lag luam: FSTN thev naus laus zis tab tom ntsib qhov kev sib tw muaj zog los ntawm lwm cov khoom siv thev naus laus zis, tshwj xeeb tshaj yog los ntawm TFT (Thin Film Transistor) LCD Technology vim tias nws cov nqi qis qis, cov xim zoo dua, qhov sib piv zoo thiab qhov pom dav. TFT LCDs belongs rau active matrix LCD zaub. Tam sim no, COB hom duab dot matrix FSTN LCD lag luam kuj ploj mus. Nyob ib ncig ntawm 2000, feem ntau ntawm cov xov tooj ntawm tes tau tsim los ntawm FSTN cov lus qhia. Lub lag luam tau tswj hwm los ntawm Nokia nrog 85% kev ua lag luam. Kev ua lag luam tau hloov tag nrho los ntawm cov xim TFT. Ua tsaug rau tus nqi qis thiab siv hluav taws xob tsawg COG sib dhos thev naus laus zis, FSTN cov lus qhia coj mus rau kev lag luam me me thiab qis dua 1/160 multiplex applications. Raws li TN cov lus qhia, lawv ntsib kev sib tw me ntsis los ntawm passive OLED (Organic Light Emitting Diode). TN thev naus laus zis kuj tseem tuaj yeem siv rau active TFT LCDs uas tab tom ntsib kev nyuaj los ntawm AMOLED (Active Matrix OLED). Tam sim no, micro LED zaub kuj tau tshwm sim hauv khw. TN hom active matrix TFT LCD zaub tau ntsib kev nyuaj siab hauv kev lag luam loj loj.
