Kev tshuaj xyuas ntawm hom interface thiab cov ntsiab lus interface ntawm Tft Display
Cov ntsiab lus luv luv ntawm Tft zaub interfaces xws li I2C, SPI, UART, RGB, LVDS, MIPI, EDP, thiab DP
Tft Lcd Screen mainstream zaub interface qhia
LCD interface: SPI interface, I2C interface, UART interface, RGB interface, LVDS interface, MIPI interface, MDDI interface, HDMI interface, eDP interface
MDDI (Mobile Display Digital Interface) yog serial interface rau cov xov tooj ntawm tes thiab lwm yam.
Lub computer zaub interface: DP, HDMI, DVI, VGA thiab lwm yam 4 yam interfaces.Kev ua tau zoo ntawm cov kab hluav taws xob: DP> HDMI> DVI> VGA.Ntawm lawv, VGA yog lub teeb liab analog, uas yog qhov pib tshem tawm los ntawm lub ntsiab lus tam sim no.DVI, HDMI, thiab DP yog tag nrho cov teeb liab digital, uas yog lub ntsiab lus tseem ceeb tam sim no.
1. Tft Lcd Screen RGB interface
(1) Interface txhais
Tft Display RGB xim yog xim qauv hauv kev lag luam.Nws yog tau los ntawm kev hloov peb xim raws ntawm liab (R), ntsuab (G), thiab xiav (B) thiab superimposing lawv ib leeg kom tau ntau yam xim., RGB yog xim uas sawv cev rau peb txoj kab liab, ntsuab, thiab xiav.Cov qauv no suav nrog yuav luag tag nrho cov xim uas tib neeg lub zeem muag pom tau.Nws yog ib qho ntawm cov xim siv ntau tshaj plaws nyob rau tam sim no.
Tft Display VGA teeb liab thiab RGB teeb liab
Lcd Screen RGB: Cov txheej txheem ntawm kev encoding xim yog sib sau ua ke hu ua "xim chaw" lossis "gamut".Hauv cov ntsiab lus yooj yim tshaj plaws, "xim qhov chaw" ntawm ib qho xim hauv ntiaj teb tuaj yeem txhais tau tias yog tus lej ruaj lossis hloov pauv.RGB (liab, ntsuab, xiav) tsuas yog ib qho ntawm ntau qhov chaw xim.Nrog rau txoj kev encoding no, txhua xim tuaj yeem sawv cev los ntawm peb qhov sib txawv - qhov kev siv ntawm liab, ntsuab, thiab xiav.Lcd Zaub RGB yog cov txheej txheem ntau tshaj plaws thaum kaw thiab tso saib cov duab xim.
Cov muaj pes tsawg leeg ntawm Lcd Zaub VGA teeb liab tau muab faib ua tsib hom: RGBHV, uas yog peb lub ntsiab xim liab, ntsuab thiab xiav, thiab kab thiab teb synchronization signals.Lub Lcd Screen VGA kis tau tus mob nrug yog luv heev.Txhawm rau xa qhov kev ncua deb ntawm qhov tseeb engineering, tib neeg disassemble Lcd Display VGA cable, cais tsib lub teeb liab ntawm RGBHV, thiab xa lawv nrog tsib coaxial cables.Txoj kev sib kis no hu ua Lcd Display RGB kis.Nws yog kev cai No lub teeb liab tseem hu ua Lcd Screen RGB teeb liab.
Hauv lwm lo lus, tsis muaj qhov sib txawv ntawm RGB thiab VGA.
Feem ntau cov khoos phis tawj thiab cov khoom siv sab nraud tau txuas nrog los ntawm analog Lcd Screen VGA interface, thiab cov duab duab cov ntaub ntawv tsim tawm digitally hauv lub khoos phis tawj tau hloov pauv mus rau R, G, B peb lub cim xim xim thiab kab thiab teb los ntawm digital / analog converter hauv daim card.Synchronous teeb liab, lub teeb liab kis mus rau cov khoom siv los ntawm lub cable.Rau cov khoom siv analog, xws li analog CRT saib, lub teeb liab raug xa ncaj qha mus rau qhov sib txuas ua ke los tsav thiab tswj cov duab raj los tsim cov duab.Rau cov khoom siv digital xws li LCD thiab DLP, tus sib txuas A / D (analog / digital) converter yuav tsum tau teeb tsa hauv cov khoom siv los hloov cov teeb liab analog rau hauv cov teeb liab.Tom qab D/A thiab A/D2 hloov dua siab tshiab, ib co duab cov ntsiab lus yog inevitably ploj.
Yog li ntawd, cov duab zoo ntawm cov khoom siv siv lub Lcd Display DVI interface yog qhov zoo dua.Daim npav daim npav feem ntau siv DVD-I interface, yog li nws tuaj yeem txuas rau ib qho Lcd Display VGA interface los ntawm lub adapter.Tus saib nrog DVI interface feem ntau siv DVI-D interface.
(2) Hom interface: a.Parallel RGB b.Serial RGB
3) Interface nta
a.Lub interface feem ntau yog 3.3V qib
b.Synchronization teeb liab yuav tsum tau
c.Cov duab cov ntaub ntawv yuav tsum tau rov kho dua txhua lub sijhawm
d.Lub sijhawm tsim nyog yuav tsum tau teeb tsa
Parallel RGB Interface
Serial RGB interface
4) Kev daws teeb meem siab tshaj plaws thiab moos zaus
a.Parallel RGB
Kev daws teeb meem: 1920 * 1080
Zaus moos: 1920 * 1080 * 60 * 1.2 = 149MHZ
b.Serial RGB
Kev daws teeb meem: 800 * 480
Zaus moos: 800 * 3 * 480 * 60 * 1.2 = 83MHZ
2. LVDS interface
(1) Interface txhais
Ips Lcd LVDS, Tsawg Voltage Differential Signaling, yog qhov tsis tshua muaj hluav taws xob sib txawv ntawm lub tshuab hluav taws xob interface.Nws yog ib txoj kev xa xov hluav taws xob digital video tsim los ntawm American NS lub tuam txhab kom kov yeej qhov tsis txaus ntawm kev siv hluav taws xob loj thiab loj EMI electromagnetic cuam tshuam thaum xa cov ntaub ntawv broadband siab me ntsis hauv TTL qib hom.
Lub Ips Lcd LVDS tso zis interface siv lub viav vias tsis tshua muaj hluav taws xob (txog 350mV) los xa cov ntaub ntawv los ntawm kev sib kis sib txawv ntawm ob lub PCB kab lossis ib khub ntawm cov kab sib npaug, uas yog, qhov sib txawv ntawm cov teeb liab sib txawv.Siv Ips Lcd LVDS tso zis interface, lub teeb liab tuaj yeem xa mus rau ntawm qhov sib txawv PCB kab lossis sib npaug cable ntawm tus nqi ntawm ntau pua Mbit / s.Vim qhov tsis tshua muaj hluav taws xob thiab tsis tshua muaj kev tsav tsheb tam sim no, tsis tshua muaj suab nrov thiab siv hluav taws xob tsawg tau paub.
2) Hom interface
a.6-ntsis LVDS tso zis interface
Nyob rau hauv qhov kev sib txuas lus no, ib qho kev sib kis tau txais yuav, thiab txhua lub teeb liab xim pib siv 6-ntsis cov ntaub ntawv, tag nrho ntawm 18-ntsis RGB cov ntaub ntawv, yog li nws tseem hu ua 18-ntsis lossis 18-ntsis LVDS interface.
b.Dual 6-ntsis LVDS tso zis interface
Hauv qhov kev sib txuas lus no, ob txoj kev sib kis tau txais yuav, thiab txhua lub teeb liab xim pib siv 6-ntsis cov ntaub ntawv, ntawm cov ntaub ntawv khib-txoj kev yog 18-ntsis, txawm-txoj kev cov ntaub ntawv yog 18-ntsis, thiab tag nrho ntawm 36-ntsis. RGB cov ntaub ntawv, yog li nws tseem hu ua 36-ntsis lossis 36-ntsis LVDS interface.
c.Ib leeg 8-ntsis LVDS tso zis interface
Nyob rau hauv qhov kev sib txuas lus no, ib qho kev sib kis tau txais yuav, thiab txhua lub teeb liab xim pib siv 8-ntsis cov ntaub ntawv, tag nrho ntawm 24-ntsis RGB cov ntaub ntawv, yog li nws tseem hu ua 24-ntsis lossis 24-ntsis LVDS interface.
d.Dual 8-ntsis LVDS tso zis interface
Hauv qhov kev sib txuas lus no, ob txoj kev sib kis tau txais yuav, thiab txhua lub teeb liab xim pib siv 8-ntsis cov ntaub ntawv, ntawm cov ntaub ntawv khib-txoj kev yog 24-ntsis, txawm-txoj kev cov ntaub ntawv yog 24-ntsis, thiab tag nrho ntawm 48-ntsis. RGB cov ntaub ntawv kuj tseem hu ua 48-ntsis lossis 48-ntsis LVDS interface.
3) Interface nta
a.Kev kub ceev (feem ntau 655Mbps)
b.Tsawg voltage, tsawg zog noj, tsawg EMI (swing 350mv)
c.Muaj zog tiv thaiv kev cuam tshuam muaj peev xwm, sib txawv teeb liab
(4) Kev daws teeb meem
a.Ib qho channel: 1280 * 800 @ 60
1366 * 768 * 60 hli
b.Dual channel: 1920 * 1080 @ 60
3. Ips Lcd MIPI interface
(1) Ips Lcd MIPI txhais
Lub Ips Lcd MIPI Alliance tau txhais cov txheej txheem kev sib txuas los ua tus qauv kev sib txuas sab hauv ntawm lub xov tooj ntawm tes xws li cov koob yees duab, Kua Crystal Display, basebands, thiab xov tooj cua zaus cuam tshuam, yog li ua kom tsim tau yooj yim thaum txo tus nqi, tsim kev nyuaj, kev siv hluav taws xob, thiab EMI.
2) Liquid Crystal Display MIPI nta
a.Kev kub ceev: 1Gbps / Txoj kab, 4Gbps throughput
b.Tsawg zog noj: 200mV sib txawv viav vias, 200mv hom voltage
c.Lub suab nrov
d.Tsawg tus pins, yooj yim dua PCB layout
(3) Kev daws teeb meem
MIPI-DSI: 2048 * 1536 @ 60fps
4) MIPI-DSI hom
a.Hom lus txib
Ua raws li MIPI-DBI-2 ntawm qhov sib txuas sib txuas, nrog Ncej Tsis Siv Neeg, txoj kev swiping lub vijtsam raws li cov lus txib ntawm DCS zoo ib yam li CPU screen.
b. Video hom
Ua raws li MIPI-DPI-2 ntawm qhov sib txuas sib txuas, lub vijtsam tshiab yog raws li lub sijhawm tswj hwm, zoo ib yam li Liquid Crystal Display RGB synchronous screen
(5) Txoj kev ua haujlwm
a.Hais kom ua hauj lwm txoj kev
Siv DCS Long Write Command Packet los kho GRAM.
DCS cov lus txib ntawm thawj pob ntawv ntawm txhua tus ncej yog write_memory_start kom ua tiav synchronization ntawm txhua tus ncej
b.Yuav ua li cas video ua haujlwm
Siv pob ntawv sync kom ua tiav lub sijhawm synchronization, thiab Pixel pob ntawv kom paub txog Liquid Crystal Display refresh.Qhov chaw dawb paug tuaj yeem yog qhov tsis txaus ntseeg, thiab txhua tus ncej yuav tsum xaus nrog LP.
4. Liquid Crystal Display HDMI interface
(1) Interface txhais
a.High-Definition Multimedia Interface
b.Digital interface, xa video thiab suab tib lub sijhawm
c.Kev xa tawm ntawm cov ntaub ntawv tsis muaj yees duab thiab compressed / uncompressed cov ntaub ntawv suab
(2) keeb kwm kev loj hlob
a.Thaum lub Plaub Hlis 2002, xya lub tuam txhab suav nrog Hitachi, Panasonic, Philips, Silicon Image, sony, Thomson, thiab Toshiba tau tsim lub koom haum HDMI thiab pib tsim.
Txhawm rau txheeb xyuas tus qauv tshiab rau kev tshaj tawm digital video / audio.
b.Thaum lub Kaum Ob Hlis 2002, HDMI 1.0 raug tso tawm
c.Thaum Lub Yim Hli 2005, HDMI 1.2 tau tso tawm
d.Thaum Lub Rau Hli 2006, HDMI 1.3 tau tso tawm
e.Thaum lub Kaum Ib Hlis 2009, HDMI 1.4 tau tso tawm
f.Thaum lub Cuaj Hlis 2013, HDMI 2.0 tau tso tawm
3) HDMI nta
a.TMDS
Transition Minimized Differential Signal
8 ntsis ~ 10 ntsis DC sib npaug encoding
10-ntsis cov ntaub ntawv raug xa mus txhua lub voj voog
b.EDID thiab DDC
Paub tsuas yog kev sib txuas ntawm cov khoom siv
c.Hloov Video thiab Suab
Tus nqi qis dua, kev sib txuas yooj yim dua
d. HDCP
High-Bandwidth Digital Content Protection
Dab tsi yog 4 qhov sib cuam tshuam ntawm lub computer saib: VGA, DVI, HDMI, thiab DP interfaces?
Qee cov phooj ywg feem ntau txhawj xeeb txog qhov twg interface yog qhov zoo tshaj plaws rau lub khoos phis tawj saib, seb cov ntaub ntawv cable siv los ntawm kuv lub monitor yog qhov zoo tshaj plaws, txawm tias nws txhawb siab txhais, thiab lwm yam. Qhov tseeb, cov ntaub ntawv cable tsis yog qhov tseem ceeb tshaj plaws, ntev npaum li cas. Raws li koj lub khoos phis tawj motherboard / daim npav duab thiab saib nrog nws, nws tsim nyog thiab tsis cuam tshuam rau koj qhov kev paub.Raws li cov zaub interface zoo dua, qhov ntawd yog qhov taw tes.
Tam sim no, cov kev sib txuas sib txuas ntawm lub computer saib feem ntau suav nrog DP, HDMI, DVI, thiab VGA.Kev ua tau zoo ntawm cov kab hluav taws xob: DP> HDMI> DVI> VGA.Ntawm lawv, VGA yog lub teeb liab analog, uas yog qhov pib tshem tawm los ntawm lub ntsiab lus tam sim no.DVI, HDMI, thiab DP yog tag nrho cov teeb liab digital, uas yog lub ntsiab lus tseem ceeb tam sim no.
VGA interface
VGA (Video Graphics Array) yog tus qauv xa tawm video qhia los ntawm IBM ua ke nrog PS / 2 tshuab hauv xyoo 1987. Nws muaj qhov zoo ntawm cov kev daws teeb meem siab, cov zaub ceev ceev thiab cov xim nplua nuj, thiab tau siv dav hauv kev nthuav qhia xim.Txhawb kub plugging, tab sis tsis txhawb lub suab kis tau tus mob.
VGA interface yog qhov feem ntau, uas yog hom uas peb niaj hnub saib xyuas lub computer txuas nrog lub tshuab computer.VGA interface yog D-hom interface nrog 15 tus pins tag nrho, muab faib ua peb kab, tsib hauv txhua kab.Thiab VGA interface muaj zog nthuav dav thiab tuaj yeem hloov pauv tau yooj yim nrog DVI interface.Kev taw qhia ntawm VGA interface yog raws li hauv qab no:
DVI interface
digital video interface
DVI yog lub ntsiab lus siab interface, tab sis tsis muaj suab, uas yog hais tias, DVI video cable tsuas yog xa cov duab kos duab kos duab, tab sis tsis xa cov cim suab.Lub interface zoo li qhia hauv qab no:
DVI interface muaj 3 hom thiab 5 specifications, thiab lub davhlau ya nyob twg interface loj yog 39.5mm × 15.13mm.Peb hom muaj xws li DVI-A, DVI-D thiab DVI-I interface cov ntaub ntawv.
DVI-D tsuas yog muaj qhov cuam tshuam digital, thiab DVI-I muaj ob qho tib si digital thiab analog interfaces.Tam sim no, DVI-D yog daim ntawv thov tseem ceeb.Tib lub sijhawm, DVI-D thiab DVI-Kuv muaj ib leeg-channel (Single Link) thiab dual-channel (Dual Link).Feem ntau, qhov peb feem ntau pom yog ib-channel version, thiab tus nqi ntawm dual-channel version yog siab heev, yog li tsuas yog qee cov cuab yeej tshaj lij muaj nyob, thiab nws nyuaj rau cov neeg siv khoom yooj yim pom nws.DVI-A yog tus qauv sib kis zoo sib xws, uas feem ntau tuaj yeem pom hauv cov kev tshaj lij CRTs loj.Txawm li cas los xij, vim tias nws tsis muaj qhov sib txawv tseem ceeb ntawm VGA thiab nws qhov kev ua tau zoo tsis siab, DVI-A tau raug tso tseg.
HDMI interface
HDMI
HDMI tuaj yeem xa cov duab siab txhais thiab cov teeb liab suab.Feem ntau hais lus, TV txuas nrog lub tsev, thiab nws muaj zog tiv thaiv kev cuam tshuam.Nws yog tsim nyog hais tias lub interface ntawm lub tsheb tam sim no, xws li tsheb navigation, kuj yog HDMI.
Qhov zoo ntawm HDMI interface HDMI tuaj yeem ua tsis tau tsuas yog ua tau raws li qhov kev daws teeb meem ntawm 1080P, tab sis kuj txhawb cov suab digital xws li DVD Audio, thiab txhawb yim-channel 96kHz lossis lub tso suab 192kHz digital audio transmission.
HDMI txhawb EDID thiab DDC2B, yog li cov khoom siv nrog HDMI muaj cov yam ntxwv ntawm "plug thiab ua si".Lub teeb liab qhov chaw thiab cov cuab yeej tso saib yuav cia li "sib tham" thiab xaiv qhov tsim nyog tshaj plaws video / suab hom.
DP interface
HD digital zaub interface
DisplayPort kuj yog ib qho kev qhia siab ntawm cov khoom siv digital interface tus qauv, uas tuaj yeem txuas nrog lub computer thiab saib, lossis rau lub khoos phis tawj thiab tsev ua yeeb yam.DisplayPort tau yeej kev txhawb nqa ntawm kev lag luam loj xws li AMD, Intel, NVIDIA, Dell, HP, Philips, Samsung, thiab lwm yam, thiab nws yog dawb rau siv.
Muaj ob hom DisplayPort cov khoom txuas sab nraud: ib qho yog hom qauv, zoo ib yam li USB, HDMI thiab lwm yam txuas;lwm yam yog hom qis-profile, feem ntau yog rau cov ntawv thov uas muaj qhov txwv kev sib txuas, xws li cov khoos phis tawj ultra-thin.
DP interface tuaj yeem nkag siab tias yog qhov hloov kho dua tshiab ntawm HDMI, uas muaj zog dua hauv kev xa suab thiab video.
Post lub sij hawm: Sep-06-2023