Kev Taw Qhia ntawm LVDS interface ntawm TFT-LCD LCD screen

Lub ntsiab lus ntawm LVDS Interface

Lub ntsiab lus ntawm LVDS interface yog hais txog lub luag haujlwm ntawm LVDS input kawg interface pin ntawm LCD vaj huam sib luag, uas feem ntau tuaj yeem kawm tau los ntawm kev sab laj cov ntaub ntawv Hoobkas thawj zaug ntawm LCD screen (feem ntau hu ua phau ntawv qhia txog qhov screen). Txawm hais tias cov qauv lus Askiv sib txawv ntawm LCD screen interface function txawv, Tab sis nws tsis nyuaj rau pom qhov ntawd, txiav txim siab los ntawm qhov kev txiav txim ntawm nws cov ntawv tseem ceeb thiab cov lej, Piv txwv li, qee lub CLAA170EA02 qauv LCD screen, Saib ntawm lub rooj txhais interface uas tau muab los ntawm lub chaw tsim khoom, Raws li tuaj yeem pom los ntawm kab lus luv luv hauv lus Askiv, Nrog RXO thiab RXE, Txhua txoj kab muaj tus lej "0" ~ "3" pawg cov ntaub ntawv teeb liab, Thiab muaj 1 teeb ntawm lub moos teeb liab (RXOC lossis RXEC), Qhov no qhia tau hais tias LCD screen yog 30-pin, dual, 8-bit screen, Nws kuj tsis nyuaj rau pom nws lub luag haujlwm pin, Ntawd yog, "RXO0-" sawv cev rau thawj pawg ntawm cov ntaub ntawv 1-, "RXO0 +" txhais tau tias thawj pawg ntawm cov ntaub ntawv: 1 +; "RXE0-" qhia txog cov ntaub ntawv thib ob 1-, "RXE0 +" qhia txog cov ntaub ntawv thib ob 1 +, Tus so, thiab lwm yam. Lub LVDS interface nta LVDS yog lus Askiv luv luv "Low Voltage Differential Signaling" uas txhais tau tias lub teeb liab sib txawv qis. LVDS kov yeej qhov tsis zoo ntawm kev xa broadband kev siv hluav taws xob ntau thiab EMI electromagnetic cuam tshuam hauv hom TTL, thiab yog hom kev xa cov teeb liab digital video. Lub LVDS output interface siv lub zog hluav taws xob qis heev (kwv yees li 350mV) los xa cov ntaub ntawv los ntawm qhov sib txawv ntawm ob lub xov hlau PCB lossis ib khub ntawm cov xov hlau sib npaug. Lub LVDS interface xa cov teeb liab ntawm lub PCB sib txawv lossis cov xov hlau sib npaug ntawm tus nqi ntawm pua ​​pua megbits ib ob. Vim yog lub zog hluav taws xob qis thiab hom tsav tsheb qis, nws muaj qhov zoo ntawm lub suab qis thiab kev siv hluav taws xob tsawg. Hauv LCD xim TV, LVDS kab siv cov xov hlau sib npaug feem ntau, nws yog kab khub sib ntswg tiag tiag. Lub LVDS interface circuit Cheebtsam ntawm LCD xim TV lossis xim zaub ntawm thawj qhov kev txiav txim siab ntawm cov teeb liab nkag (xws li TV, AV, thiab lwm yam), kom tau txais RGB teeb liab, nws cov txheej txheem ua tiav zoo ib yam li cov xim TV ib txwm muaj, thiab tom qab ntawd los ntawm RGB-LVDS hloov pauv, tso zis LVDS teeb liab, xa mus rau LCD screen. Txij li thaum TFT hauv LCD screen tsuas yog lees paub TTL (RGB) teeb liab, LVDS xa mus rau LCD screen yuav tsum txiav txim siab TTL teeb liab. Nws tuaj yeem pom tias LVDS interface circuit muaj ob ntu: LVDS output interface circuit ntawm sab motherboard (LVDS transmitter), thiab LVDS input interface circuit (LVDS receiver) ntawm sab LCD vaj huam sib luag. Lub LVDS transmitter terminal hloov TTL teeb liab mus rau hauv LVDS teeb liab, thiab tom qab ntawd xa cov teeb liab mus rau LVDS decoding IC ntawm LCD vaj huam sib luag los ntawm kab cable lossis flexible cable ntawm lub tsav vaj huam sib luag thiab LCD vaj huam sib luag), hloov cov teeb liab serial mus rau hauv lub teeb liab sib luag ntawm TTL theem, thiab tom qab ntawd xa mus rau LCD lub sijhawm tswj thiab qib tsav circuit.