Pib nrog LCD Tsav Tsav Tsheb: Lawv Yog Dab Tsi, Lawv Ua Haujlwm Li Cas, thiab Kev Xaiv Cov Pitfalls

Nyob zoo txhua leej txhua tus, Kuv yog Chloe, thiab tsis ntev los no kuv tau dhia tob rau hauv DIY cov phiaj xwm tso saib, los ntawm kev rov ua dua cov phau ntawv qub rau kev tsim cov kev cai teeb tsa nrog Raspberry Pi lossis lwm lub khoos phis tawj nkaus xwb -. Ib qho kev tivthaiv uas tawm mus rau ntau tus neeg pib tshiab (thiab txawm tias qee tus neeg paub txog) yog lub rooj tsavxwm LCD - tseem hu ua pawg tswj hwm lossis pawg tswj hwm.

Tej zaum koj tau yuav HDMI-rau-LVDS tsav tsheb board vam tias yuav tig lub khoos phis tawj seem rau hauv qhov thib ob TFT LCD saib, tsuas yog xaus nrog lub vijtsam dub, cov xim flickering, lossis cov duab tsis pom. Suab paub? Hauv cov ntawv tshaj tawm no, cia peb tawg raws nraim qhov LCD tsav tsheb ua haujlwm li cas, nws ua haujlwm li cas, thiab yuav ua li cas kom tsis txhob muaj qhov yuam kev feem ntau thaum xaiv ib qho.

Hauv ib kab lus:Lub rooj tsavxwm LCD yog lub teeb liab txhais lus, adapter, thiab tus thawj tswj fais fab tag nrho hauv ib qho compact PCB.

Cov peev txheej niaj hnub no xws li HDMI, DisplayPort, USB-C, lossis txawm tias laus dua VGA / RGB tso tawm los ntawm cov khoom siv xa cov teeb liab video hauv cov qauv uas feem ntau cov LCD vaj huam sib luag (tshwj xeeb tshaj yog cov los ntawm laptops, cov khoom siv hauv tsev, lossis kev siv tsheb) tsis tuaj yeem nkag siab ncaj qha. Tus tsav tsheb board mus rau:

• Txais thiab txiav txim siab lub teeb liab tuaj
• Scale/resize nws kom phim lub vaj huam sib luag qhov kev daws teeb meem
• Tsim kom muaj lub sijhawm thiab cov ntaub ntawv hom vaj huam sib luag xav tau (LVDS, eDP, TTL / RGB, MIPI DSI, thiab lwm yam)
• Muab lub hwj chim rov qab, OSD cov ntawv qhia zaub mov, khawm inputs, thiab lwm yam

Yog tsis muaj lub rooj tsav tsheb sib raug zoo, feem ntau liab qab TFT LCD vaj huam sib luag - hom koj pom hauv laptops lossis cov khoom lag luam kev cai - tsuas yog yuav tsis teeb lossis qhia dab tsi siv tau.

Ntawm no yog ib qho layout uas koj yuav pom nyob rau hauv feem ntau boards:
 

• Tshooj lus: HDMI, DisplayPort, VGA, Hom-C (nrog DP Alt Mode), AV, thiab lwm yam.
   
• Main scaler nti (SoC): Realtek RTD2660/RTD2662/RTD2785/RTD279x series yog cov tsis tshua muaj tshwm sim thiab txhim khu kev qha; Lwm tus suav nrog Novatek, MStar, lossis Fitipower chips.
   
• Microcontroller (MCU): tuav OSD menus, scanning key, I²C EDID emulation, standby logic, thiab lwm yam.
   
• Kev tswj fais fab: DC-DC converters, LDOs, thiab backlight boost circuits (feem ntau siv chips xws li MT6815, MT6818, los yog zoo sib xws rau adjustable LED backlight voltage).
   
• Cov zis seem: LVDS (nrov tshaj plaws - 30-pin lossis 40-pin), eDP, TTL/RGB parallel, lossis V-los ntawm-Ib qho rau cov vaj huam sib luag siab dua.
   
• Ntxiv: EEPROM rau khaws EDID thiab vaj huam sib luag sij hawm cov ntaub ntawv, siv lead ua oscillator, ntau yam passives.

Cov txheej txheem yog ncaj nraim tab sis meej:

1. Input teeb liab tuaj txog (piv txwv li, HDMI → TMDS txiav rau hauv cov ntaub ntawv RGB raw + moos).
    
2. Lub scaler nti resizes / teev cov duab rau lub hom phiaj vaj huam sib luag daws teeb meem (xws li, downscaling 4K input rau 1920 × 1080 los yog upscaling kom phim 1366 × 768 vaj huam sib luag).
    
3. Siv ua ntej -programmed vaj huam sib luag tsis tau (sijhawm, lub zog sib lawv liag, LVDS mapping), lub rooj tsavxwm tsim cov teeb liab tso tawm kom raug.
    
4. LVDS/eDP/TTL cov teeb liab pub rau lub vaj huam sib luag tsim-hauv T-CON board → uas tsav lub hauv paus thiab lub rooj vag kab → teeb pom kev rau ib tus pixels.

Txoj kev ua - lossis - kauj ruam yog # 3: vaj huam sib luag parameter sib piv. Tau txais lub sijhawm, qhov tob me ntsis, lossis daim ntawv qhia tsis raug, thiab koj yuav pom cov paj paj, cov xim hloov pauv, lossis tsis muaj duab txhua.

Kev lag luam hloov zuj zus sai sai, tab sis ntawm no yog cov kev ntseeg siab tshaj plaws thiab siv dav siv tam sim no:

• Rau Raspberry Pi / Android board mirroring → HDMI + V- los ntawm -Ib qho lossis HDMI + eDP boards
   
• Rau kev rov siv phau ntawv sau / laptop cov ntxaij vab tshaus → Universal boards zoo li MT5610 / MT5620 series (zoo EDID kev txhawb nqa)
   
• Rau cov laus muaj / kho mob / TTL-era panels → VGA / HDMI rau TTL (8-ntsis lossis 24-ntsis) converters
   
• Rau siab- rov kho cov vaj huam sib luag me me (piv txwv li, xov tooj OLED/TFT repurposing) → MIPI rau LVDS lossis HDMI rau MIPI dev boards (ntau dua tab sis tseem ceeb)
   
• Qhov zoo tshaj plaws txhua yam -tus nqi ib puag ncig → Realtek RTD2785 / RTD2796 tsev neeg (tam sim no txhawb 4K, Hom-C input, thiab firmware hloov tshiab ntawm ntau tus qauv)

Cov no yog mus- rau cov kev xaiv rau cov neeg nyiam ua haujlwm tsim kev cai TFT LCD saib lossis cov khoom siv nqa tau.

Ua ntej yuav los yog txuas:

• Nco ntsoov lees paub lub vaj huam sib luag hom interface, kev daws teeb meem, backlight voltage / tam sim no, thiab LVDS ntsis qhov tob / channel suav (6/8-ntsis, ib zaug / dual).
• Ua ntej boards nrog firmware upgrade txhawb thiab EDID kho muaj peev xwm.
• Paj npo / xim hloov / kab txaij? → Yuav luag txhua lub sijhawm tsis sib haum lossis LVDS daim ntawv qhia.
• Backlight yuav tsis qhib tab sis OSD tshwm? → Txheeb xyuas qhov hluav taws xob backlight (kev xaiv ntau: 5V / 6.5V / 9V / 12V) thiab qhov ntsuas tam sim no.

Ua raws li cov no, thiab koj yuav txuag sij hawm ntawm kev debugging.

Kuv vam tias qhov no tshem tawm qhov tsis meej ntawm LCD tsav tsheb boards rau txhua tus tinkering nrog cov lus qhia! Hauv tsab ntawv tshaj tawm tom ntej, peb yuav taug kev los ntawm txhais tes tiag tiag- ntawm phau ntawv qhia: teeb pom kev rau lub vaj huam sib luag phau ntawv tsis paub siv lub rooj tsav tsheb thoob ntiaj teb.

Koj puas tau ua haujlwm rau ib qho kev ua yeeb yam txias tsis ntev los no? Tso cov lus nrog lub vijtsam lossis lub rooj tsav xwm uas koj siv - Kuv xav hnov ​​​​txog nws.

Yog tias koj tab tom nrhiav kev txhim khu kev qha, siab - cov kev daws teeb meem zoo - seb nws puas yog lub rooj tsav tsheb uas tsim nyog, ua tiav TFT LCD saib sib dhos, lossis tag nrho cov zaub modules - xyuasMinghua Display. Raws li kev cai LCD chaw tsim tshuaj paus, peb tshwj xeeb hauv kev cai LCD tsim thiab tsim khoom, suav nrog kev ua kom zoo ntawm cov tsav tsheb sib xyaw ua ke nrog ntau hom vaj huam sib luag kom tau raws li koj cov lus qhia meej. Hu rau yog tias koj xav tau kev pab hloov koj lub tswv yim rau hauv kev tsim khoom- npaj zaub!

Hu rau tam sim no