Ib, Optical kev ua tau zoo sib xws: xyuas kom pom meej meej thiab sib xws
1. Kev sib txuas lus tseeb ntawm qhov rais loj thiab thaj chaw tso saib
Qhov chaw tso saib (Active Area, AA area) ntawm LCD yog txiav txim siab los ntawm pixel array, thiab lub qhov rais loj yuav tsum nruj me ntsis npog thaj tsam AA thiab tso nyiaj rau kev teeb tsa. Piv txwv li, cov zaub loj ntawm 7-inch LCD (qauv T-EF070K08000480ALI) yog 154.08mm × 85.92mm. Yog hais tias lub qhov rais tsim yog 155mm × 86mm, tej pixels tej zaum yuav obscured vim thav duab tolerances; Yog tias qhov qhib qhov rais loj dhau (xws li 160mm × 90mm), nws yuav ua rau muaj teeb meem hauv qab no:
Leakage: Backlight overflows los ntawm ntug ntawm lub qhov rais, ua ib tug halo nyob rau hauv lub tsaus ntuj lub xeev, cuam tshuam qhov sib piv;
Mechanical cuam tshuam: Kev sib txhuam ntawm ntug ntawm LCD thiab sab hauv phab ntsa ntawm lub vaj huam sib luag, ua rau cov zaub tsis zoo lossis puas.
Kev daws: Raws li 2D kos duab muab los ntawm cov chaw tsim khoom LCD, lub qhov rais loj yuav tsum yog 0.2mm ~ 0.5mm loj dua ib sab ntawm AA cheeb tsam (nyob ntawm seb hom vaj huam sib luag). Piv txwv li, TN cov ntxaij vab tshaus tuaj yeem yog 0.2 hli, thiab IPS cov ntxaij vab tshaus tuaj yeem yog 0.5 hli vim muaj kev cuam tshuam zoo dua.
2. Optimization ntawm lub kaum sab xis saib thiab qhov rais qhov rais
Lub kaum sab xis saib ntawm LCD (xws li 178℃/ 178℃rau IPS cov ntxaij vab tshaus) xav tau kom phim lub ntsuas ntsuas lub kaum ntse ntse. Piv txwv li, lub tsheb dashboard yuav tsum tau ua kom tau raws li tus neeg tsav tsheb kom meej meej nyeem cov ntaub ntawv nyob rau hauv ib tug kab rov tav saib lub kaum sab xis ntawm -45℃~ +45℃. Yog hais tias lub qhov rais txoj hauj lwm sib txawv ntawm qhov chaw los yog ntsia ntawm lub kaum sab xis, nws yuav ua rau muaj teeb meem hauv qab no:
Xim hloov: TN cov ntxaij vab tshaus muaj kev txo qis hauv qhov sib piv thiab xim distortion thaum deviating ntawm lub kaum sab xis;
Reflective cuam tshuam: Lub qhov rais ntug tsim ib lub kaum sab xis nrog lub LCD nto, uas tej zaum yuav muaj kev cuam tshuam lub teeb ambient.
Kev daws: Siv kho qhov muag simulation software (xws li LightTools) los simulate cov nyhuv ntawm cov ces kaum sib txawv thiab txhim kho qhov rais txoj hauj lwm. Piv txwv li, ib qho hluav taws xob tsheb dashboard siv lub iav nkhaus tsim, ua kom qhov chaw nruab nrab ntawm lub qhov rais nrog tus neeg tsav tsheb txoj kab pom, thiab ua kom pom lub kaum sab xis zoo rau ± 60 degree.
2, Kev tsim qauv sib txuam: ntsuas lub zog thiab kev sib dhos ua haujlwm
1. Lub thickness ntawm lub vaj huam sib luag yog ua haujlwm nrog lub thickness ntawm lub iav LCD
Lub thickness ntawm LCD iav (feem ntau yog 0.4mm ~ 1.1mm) ncaj qha cuam tshuam qhov tob tsim ntawm vaj huam sib luag qhov rais qhib. Yog tias lub vaj huam sib luag thickness (T) tsis phim lub iav thickness (d), nws yuav ua rau muaj teeb meem hauv qab no:
Kev nyuaj siab concentration: nyias iav (d<0.7mm) is prone to cracking in thick panels (T>3mm) vim lub siab sib dhos;
Excessive gap: Thick glass (d>1.0mm) tej zaum yuav ua rau cov zaub deformation nyob rau hauv nyias panels (T<2mm) due to insufficient support.
Kev daws: Xaiv cov qauv vaj huam sib luag raws li iav thickness:
Nyias iav (d Tsawg dua lossis sib npaug li 0.7mm): txais yuav "hlau thav duab + ua npuas ncauj" cov qauv them nyiaj, piv txwv li, ntxiv 0.3mm stainless hlau thav duab rau sab nraud ntawm 0.55mm iav thiab sau qhov sib txawv nrog 0.2mm silicone ua npuas ncauj;
Thick glass (d>0.7mm): ncaj qha kos rau hauv lub vaj huam sib luag, tab sis qhov cuam tshuam kev ua haujlwm yuav tsum raug txheeb xyuas los ntawm kev txheeb xyuas qhov kawg (FEA). Piv txwv li, ib qho khoom siv HMI uas siv 0.9 hli iav tau pom qhov ua tsis tiav ntawm 3.2% mus rau 0.5% hauv kev ntsuas kub ntawm -30℃rau +85℃.
2. Kev kho qhov rai ntug thiab tiv thaiv plua plav thiab dej
Chamfers, burrs, lossis ntse npoo ntawm ntug ntawm lub qhov rais tuaj yeem khawb qhov chaw ntawm LCD lossis cov plua plav, cuam tshuam rau cov khoom siv. Piv txwv li, lub dashboard ntawm cov cuab yeej kho mob tsis tau kho nrog C- lub kaum sab xis ntawm ntug ntawm lub qhov rais, ua rau tsim "dub pob" thaum cov plua plav nkag.
Kev daws:
Mechanical processing: Lub ntug ntawm lub qhov rais yog chamfered nrog C0.5 ~ C1 thiab burrs raug tshem tawm;
Sealing tsim: Sau silicone lossis ob npaug -ib daim kab xev ntawm LCD thiab lub vaj huam sib luag. Piv txwv li, ib qho cuab yeej sab nraum zoov txais yuav IP67 kev tiv thaiv qib tsim thiab tsis muaj dej thiab plua plav los ntawm 0.5mm tuab silicone sealing nplhaib.
3, Environmental adaptability matching: teb rau kev ua hauj lwm hnyav
1. Kev nthuav dav kub thiab cov khoom siv thermal txuam
Qhov ntsuas kub ua haujlwm ntawm LCD (-30℃~{1}} degree) yuav tsum tau ua kom haum nrog cov khoom vaj huam sib luag. Yog tias cov coefficient ntawm thermal expansion (CTE) qhov sib txawv ntawm cov khoom vaj huam sib luag (xws li PC yas) thiab LCD iav loj dhau, nws yuav ua rau muaj teeb meem hauv qab no:
Tsawg kub nkig tawg: CTE ntawm PC yog 60 × 10 ⁻⁶ / degree, thaum lub iav yog 3 × 10 ⁻⁶ / degree. Ntawm -30 degree, lub shrinkage ntawm PC yog 20 npaug ntawm cov iav, uas yuav ua rau muaj kev ntxhov siab nyob rau ntawm ntug iav;
Qhov kub thiab txias deformation: Ntawm +85℃, PC tuaj yeem muag muag, ua rau muaj kev hloov pauv ntawm qhov rais loj tshaj 0.1 hli thiab cuam tshuam rau cov duab sib dhos.
Kev daws:
Kev xaiv cov khoom siv: Siv cov ntaub ntawv CTE qis (xws li PPS yas, CTE ntawm 20 × 10 ⁻⁶ /℃) lossis hlau panels (xws li aluminium alloy, CTE ntawm 23 × 10 ⁻⁶ /℃);
Cov qauv kev them nyiaj: Khaws qhov sib txawv ntawm 0.1mm ~ 0.2mm ntawm LCD thiab lub vaj huam sib luag, thiab nqus cov thermal deformation los ntawm cov khoom elastic (xws li daim hlau caij nplooj ntoos hlav).
2. Kev vibration thiab kev tiv thaiv kev cuam tshuam
Cov cuab yeej siv hluav taws xob lossis cov khoom siv hauv nkoj yuav tsum tiv thaiv kev vibrations (xws li 5Hz ~ 200Hz) lossis cuam tshuam (xws li 10g / 11ms). Yog hais tias lub qhov rais loj dhau los yog lub zog ntawm cov qauv tsis txaus, nws yuav ua rau muaj teeb meem hauv qab no:
LCD hloov pauv: Kev vibration ua rau muaj kev hloov pauv ntawm qhov sib txawv ntawm LCD thiab lub vaj huam sib luag, ua rau pom qhov tsis zoo;
Kev tawg iav: Lub zog cuam tshuam yog xa mus rau LCD los ntawm lub vaj huam sib luag. Piv txwv li, nyob rau hauv ib tug tej yam kev tsim kho machinery dashboard, lub iav breakage tus nqi mus txog 15% nyob rau hauv kev co kev ntsuam xyuas vim tsis muaj ib tug tsis muaj qauv tsim.
Kev daws:
Tsis siv neeg tsim: Muab 0.5 hli tuab PORON ua npuas ncauj rau sab nraum qab ntawm LCD kom nce qhov cuam tshuam lub zog nqus mus rau 85%;
Txoj kev ruaj khov: Ob chav kho nrog "screws + buckles" yog siv. Piv txwv li, ib lub tsheb dashboard siv 4 M2 screws thiab 2 buckles los kho lub LCD, thiab cov zaub ua haujlwm tseem zoo li qub thaum kuaj kev cuam tshuam.
4, Cov ntaub ntawv siv tshuaj ntsuam xyuas
Case 1: Tsim Cov Tsheb Hluav Taws Xob Dashboard
Lub dashboard ntawm qee hom tsheb hluav taws xob txais yuav 12.3-nti IPS LCD (kev daws teeb meem 1920 × 720), thiab cov ntsiab lus tseem ceeb ntawm nws lub qhov rais tsim yog raws li hauv qab no:
Qhov loj me sib txuam: Lub qhov rais loj yog 291.84mm × 109.44mm (0.3mm loj dua AA cheeb tsam ntawm ib sab), nrog rau C0.5 chamfer ntawm ntug;
Cov qauv kev them nyiaj: 0.8mm tuab aluminium alloy panels yog siv, thiab qhov khoob tau ntim nrog 0.3mm silicone ua npuas ncauj;
Kev hloov pauv ib puag ncig: Kev ua haujlwm kub yog -40℃~ +85℃, thiab thermal deformation txheeb xyuas los ntawm FEA yog tsawg dua 0.05mm.
Case 2: Industrial HMI Equipment Design
Cov cuab yeej HMI ntawm qee lub Hoobkas tswj txee txais yuav 7-nti TFT LCD (kev daws teeb meem 800 × 480), thiab cov ntsiab lus tseem ceeb ntawm nws qhov rais tsim yog raws li hauv qab no:
Dustproof thiab Waterproof: Sau lub npoo ntawm lub qhov rais nrog 0.5mm tuab silicone sealing nplhaib kom ua tiav IP65 tiv thaiv qib;
Kev tiv thaiv kev vibration: 1 hli tuab PORON ua npuas ncauj yog muab tso rau sab nraum qab ntawm LCD, thiab cov khoom ua haujlwm zoo li qub tom qab kev co (10Hz ~ 500Hz);
Tus nqi optimization: TN screen (40% tus nqi qis dua IPS) yog siv, thiab lub kaum sab xis saib yog them los ntawm software algorithms (qhov tseeb saib lub kaum ntse ntse ± 60 degree).
