Cov yam ntxwv hluav taws xob thiab hom kev sib txuas ntawm LCD cov ntxaij vab tshaus yog qhov tseem ceeb uas yuav tsum tau xav txog thaum tsim thiab tsim cov ntawv thov ntsig txog. Peb yuav tsum to taub nws nyob rau theem pib ntawm kev loj hlob. Tam sim no cia peb saib seb lawv muaj dab tsi thiab cov yam ntxwv!
1. Cov yam ntxwv ntawm hluav taws xob
Fais fab mov voltage (VCC):
Kev khiav hauj lwm qhov hluav taws xob ntawm lub vijtsam zaub yog feem ntau 3.3V lossis 5V, thiab qee cov qauv yuav xav tau ntau dua voltages (xws li 12V).
Tam sim no xav tau:
Kev noj tam sim no ntawm lub vijtsam zaub thaum lub sijhawm ua haujlwm feem ntau yog nruab nrab ntawm ob peb puas milliamps thiab ob peb amps, nyob ntawm qhov loj ntawm lub vijtsam zaub thiab qhov ci siv.
Kev siv zog:
Cov qauv kev suav yog fais fab (P)=voltage (V) × tam sim no (I). Txo kev siv hluav taws xob pab txhim kho lub zog ntawm lub cuab yeej.
Kev daws teeb meem:
Tus naj npawb ntawm pixels ntawm lub vijtsam zaub, feem ntau qhia hauv qhov dav × qhov siab (xws li 320x240, 800x480).
Lub sij hawm teb:
Lub sijhawm xav tau los ntawm qhov pib ntawm daim duab hloov mus rau tag nrho cov duab ntawm daim duab tshiab, hauv milliseconds (ms). Lub sij hawm teb ceev ceev yuav txo tau cov lus tsa suab plooj.
Contrast thiab brightness:
Qhov sib txawv cuam tshuam rau lub teeb thiab qhov tsaus ntuj ntawm cov duab, thaum lub teeb ci cuam tshuam rau kev nyeem ntawv ntawm lub vijtsam hauv qab cov teeb pom kev sib txawv.
Saib lub kaum ntse ntse:
Lub degree uas cov duab zoo yog khaws cia thaum saib cov zaub los ntawm qhov sib txawv saib cov ces kaum. Lub kaum sab xis pom zoo tuaj yeem txhim kho cov neeg siv kev paub.
2. Hom interface
Lub interface ntawm LCD kua siv lead ua zaub yog siv los txuas cov tswj, microprocessors thiab lwm yam khoom siv. Cov hauv qab no yog cov hom kev sib txuas:
Parallel interface:
Cov ntaub ntawv tsheb npav: Feem ntau siv 8-ntsis lossis 16-ntsis cov ntaub ntawv tsheb thauj mus los xa cov ntaub ntawv sib luag, xws li 8080 lossis 6800 series interface.
Qhov zoo dua yog kev sib kis ceev ceev, thiab qhov tsis zoo yog tias nws tuav ntau tus pins.
Serial interface:
SPI (Serial Peripheral Interface): Feem ntau siv rau kev xa cov ntaub ntawv yooj yim thiab ceev. Feem ntau muaj plaub kab: MOSI (cov ntaub ntawv kab ntawm tus tswv mus rau qhev), MISO (cov ntaub ntawv kab los ntawm qhev mus rau tus tswv), SCK ( moos kab), CS (chip xaiv kab).
I2C (Lub Koom Haum Saib Xyuas Kev Noj Qab Haus Huv Hauv Ntiaj Teb Kev Sib Txuas Lus): Tsuas yog ob kab (SDA thiab SCL) xav tau kev sib txuas lus, uas yooj yim rau kev sib txuas ntau yam khoom siv. Haum rau kev siv qis qis.
RGB interface:
Nws stands rau "liab, ntsuab thiab xiav" hauv lus Askiv. Nws feem ntau yog siv los txuas ncaj qha rau cov duab processor. Nws tuaj yeem xa cov duab xim sai sai, muaj cov lus teb ceev ceev, thiab tsim nyog rau cov kev daws teeb meem siab.
Tswj teeb liab interface:
Xws li rov pib dua (RESET), cov ntaub ntawv / kev xaiv xaiv (DC), ** pab (ENABLE) ** thiab lwm yam teeb liab, uas yog siv los tswj cov xwm txheej thiab kev ua haujlwm ntawm cov zaub.
Kov npo interface (yog tias nws yog lub vijtsam kov):
Cov kev sib cuam tshuam feem ntau suav nrog I2C lossis SPI, uas yog siv los muab qhov chaw thiab xwm txheej ntawm kov cov xwm txheej.
Xaus
Kev nkag siab txog cov yam ntxwv hluav taws xob thiab hom kev sib txuas ntawm cov ntxaij vab tshaus LCD yog lub hauv paus rau kev tsim thiab tsim cov khoom siv hluav taws xob siv cov ntxaij vab tshaus LCD. Cov kev paub zoo li no yuav pab xaiv cov khoom kho kom raug, ua haujlwm zoo tsim thiab daws teeb meem. Xaiv cov zaub kom raug thiab nws cov interface tuaj yeem ua kom muaj kev ua tau zoo tshaj plaws thiab cov neeg siv kev paub.
