DMX vs. DALI Teeb pom kev zoo: Qhov twg xaiv?

Kev tswj teeb pom kev zoo yog lub teeb pom kev zoo tshaj plaws uas tso cai rau koj los kho tus nqi, qhov zoo thiab cov yam ntxwv ntawm lub teeb hauv ib cheeb tsam. Dimer yog ib qho piv txwv zoo ntawm kev tswj teeb pom kev zoo.

Ob lub ntsiab ntawm kev dimming tswj siv nyob rau hauv lub teeb pom kev zoo sab nraum zoov yog DMX (Digital Multiplexing) thiab DALI (Digital Addressable Lighting Interface). Txhawm rau txuag hluav taws xob, lawv siv cov kev tswj tsis siv neeg. Txawm li cas los xij, ob hom kev dimming tswj yog qhov tshwj xeeb thiab sib txawv ntawm ib leeg.

Koj puas xav kawm ntxiv? Cia peb pib los ntawm kev nkag siab tias cov kev tswj hwm no txhais li cas.

DMX yog dab tsi? 

DMX512 yog lub kaw lus tswj lub teeb tab sis nws tuaj yeem tswj tau lwm yam. "Digital Multiplex" qhia koj tias nws ua haujlwm li cas los ntawm lub npe nws tus kheej. Zoo li lub sijhawm sijhawm, cov pob ntawv uas ua rau feem ntau ntawm cov txheej txheem qhia cov khoom siv twg yuav tsum tau txais cov ntaub ntawv. Hauv lwm lo lus, tsis muaj chaw nyob thiab tsis muaj ntaub ntawv hais txog nws. Nyob rau hauv cov ntaub ntawv no, qhov chaw nyob yog txiav txim los ntawm qhov chaw ntawm lub pob ntawv.

Qhov tseeb, cov txheej txheem yog ncaj nraim. Koj tuaj yeem ua hluav taws xob sib txuas nrog 5-pin XLR connectors, thiab qhov sib txuas hauv kab sib npaug (nrog 0 V siv). Koj tuaj yeem xa cov bytes thiab cov khoom mus rau qhov chaw nres nkoj ntawm 250,000 bps. Tus qauv RS-485 yog hom hluav taws xob sib cuam tshuam.

Nws tseem ceeb heev uas yuav tsum nco ntsoov tias "512" hauv "DMX512" kuj tseem nco tau heev. Tus lej no qhia tau tias ib pob ntawv tuaj yeem muaj txog 512 bytes ntawm cov ntaub ntawv (513 raug xa mus, tab sis thawj zaug tsis siv). Ib pob tuaj yeem tuav tag nrho cov ntaub ntawv hauv DMX ntug.

Yog tias txhua lub teeb pom kev zoo tsuas yog txhawb nqa qhov yooj yim dimming rau ib qho xim, zoo li lub teeb dawb, ces ib cov ntaub ntawv byte tuaj yeem tswj lub teeb pom kev zoo thiab muaj txog li 255 qib ntawm qhov ci, los ntawm kev tawm (zero) mus rau tag nrho (255), qhov no txhais tau tias uas koj tuaj yeem tswj 512 li.

Ib qho RGB tswj cov tswv yim rau liab, ntsuab, thiab xiav lub teeb fixtures xav tau peb cov ntaub ntawv bytes. Hauv lwm lo lus, koj tsuas tuaj yeem tswj tau 170 RGB li vim tias pob ntawv (thiab, los ntawm kev txuas ntxiv, DMX ntug) tuaj yeem tuav tau 512 cov ntaub ntawv siv tau xwb.

Yog xav paub ntxiv, koj tuaj yeem nyeem Txhua Yam Koj Yuav Tsum Paub Txog DMX512 Tswj.

DALI yog dab tsi? 

DALI sawv cev rau "Digital Addressable Lighting Interface." Nws yog tus txheej txheem kev sib txuas lus digital los tswj cov teeb pom kev zoo tswj kev tes hauj lwm hauv kev tsim cov haujlwm automation. DALI yog tus qauv kev lag luam uas siv thoob plaws ntiaj teb. Nws ua rau kev sib txuas cov khoom siv LED los ntawm ntau lub tuam txhab tau yooj yim. Cov khoom siv no tuaj yeem suav nrog dimmable ballasts, receiver thiab relay modules, cov khoom siv fais fab, dimmers / controllers, thiab lwm yam.

DALI tau tsim los txhim kho 0-10V teeb pom kev zoo tswj qhov system los ntawm kev ntxiv rau dab tsi Tridonic's DSI raws tu qauv yuav ua tau. DALI systems cia lub kaw lus tswj tau tham nrog txhua tus tsav tsheb LED thiab LED ballast / pab pawg hauv ob qho tib si qhia. Lub caij no, 0-10V tswj tsuas yog cia koj tham nrog lawv hauv ib qho kev taw qhia.

DALI raws tu qauv muab LED tswj cov khoom siv tag nrho cov lus txib. DALI raws tu qauv kuj muab kev sib txuas lus raws lawv xav tau los tswj lub tsev teeb pom kev zoo. Nws kuj yog scalable thiab tuaj yeem siv rau kev teeb tsa yooj yim thiab nyuaj.

Yog xav paub ntxiv, koj tuaj yeem nyeem Txhua Yam Koj Yuav Tsum Paub Txog DALI Dimming.

Zoo sib xws ntawm DMX thiab DALI

DMX thiab DALI zoo sib xws hauv qee txoj hauv kev, ua rau lawv muaj txiaj ntsig zoo nyob rau ntau qhov xwm txheej.

  • Lub teeb controllers

Koj xav tau ib lub vaj huam sib luag rau tag nrho cov hluav taws xob ntawm txhua pab pawg ntawm cov teeb pom kev zoo. Cov no yog txhais tau tias cia DALI cov neeg siv tswj kev ploj mus, tab sis DMX siv tus maub los uas xa cov ntaub ntawv rov qab mus rau lub hauv paus tswj hwm. Cov tswj vaj huam sib luag no tuaj yeem siv rau ntau yam, xws li fading thiab hloov xim.

RS422 lossis RS485 controllers yog siv rau kev tswj xyuas tshwj xeeb rau DMX.

  • Qhov deb ntawm kev ua haujlwm

Thaum DMX thiab DALI siv ntau hom kev xaim, lawv ua haujlwm tib yam. Ob leeg cia koj txuas lub teeb mus rau lub ntsiab maub los txog li 300 meters deb. Qhov no txhais tau hais tias lub rooj tsav xwm tseem ceeb yuav tsum tau muab tso rau hauv qhov chaw zoo tshaj plaws. Koj yuav tsum tsis txhob mus tshaj 300 meters nyob rau hauv txhua txoj kev. Qhov no yog qhov uas cov fixtures txuas nrog lub siab mast teeb. Txawm tias niaj hnub super domes muaj txog 210 feet ntawm txoj kab uas hla, uas ua rau nws muaj peev xwm muab teeb rau txhua qhov chaw.

  • High mast teeb

Nrog rau ob tus tswj hwm no, lub teeb ntawm cov ncej siab siab tuaj yeem qhib thiab tawm txawm tias qhov ceev ntawm kev ua haujlwm tuaj yeem cuam tshuam los ntawm qhov sib txawv ntawm kev xaim. Lub DALI system yuav xav tau ob lub teeb pom kev zoo rau ib chav tswj rau lub teeb pom kev siab siab, thiab DMX yuav xav tau tus tswj hwm sib txawv rau txhua lub tsev txhab nyiaj.

  • Off-field teeb

Cov teeb no txuas mus rau lub teeb nyob rau hauv qhov chaw sawv thiab lwm qhov chaw ua si. Ib qho ntawm cov no tej zaum yuav yog ib qho kev tswj fade uas tau muab tso tseg txaus kom tib neeg tseem tuaj yeem taug kev nce thiab nqis ntaiv. Tig lub teeb hauv tsev thaum pab pawg tau qhab nia ib lub hom phiaj tuaj yeem qhia txog qhov yeej loj.

Qhov sib txawv ntawm DMX thiab DALI

Muaj qhov sib txawv ntawm DMX thiab DALI, tsim los txiav txim siab seb lawv puas tsim nyog rau daim ntawv thov. Qee qhov sib txawv no tau piav qhia hauv cov lus hauv qab no.

 DMXDALI
ceevCeev ceev tswj system vim lubSlow ceev tswj system 
Tus naj npawb ntawm kev sib txuasMuaj peev xwm muaj qhov siab tshaj plaws ntawm 512 kev sib txuasMuaj peev xwm muaj qhov siab tshaj plaws ntawm 64 kev sib txuas
Hom kev tswjCentralized tswj systemDecentralized tswj system
Kev tswj ximSiv cov RGB-LED tshwj xeeb, koj tuaj yeem tswj xim tswj siv DMX Nws tsis txhawb kev hloov xim; tsuas yog fading ntawm lub teeb
Yuav tsum tau cableNrog rau qhov siab tshaj plaws ntawm 300m kev pab them nqi, nws yuav tsum tau Cat-5 cable yuav tsum tau txais los ntawm nws cov kev ceev ceev.Tseem muaj qhov siab tshaj plaws ntawm 300m kev pab them nqi, nws siv ob-xaim kev sib txuas teeb
Tsis siv neeg yuav tsum tauTsis tuaj yeem ua qhov chaw nyob tsis siv neegtuaj yeem ua qhov chaw nyob tsis siv neeg
Dimming tswjIb qho yooj yim mus sivIb qho nyuaj me ntsis thiab tej zaum yuav xav tau qee qhov kev cob qhia ua ntej siv
Qhov sib txawv ntawm DMX thiab DALI
  • Kev tswj xim

DMX yog tib qhov system uas cia koj hloov xim. Tsis tas li ntawd, yuav tsum siv lub teeb LED tshwj xeeb uas tuaj yeem hloov xim. Qhov kev xaiv zoo tshaj plaws yog RGB-LED, txawm hais tias tej zaum yuav muaj kev xaiv zoo dua rau kev teeb pom kev zoo. Cov teeb no tuaj yeem taw tes rau ob qho tib si cov neeg tuaj saib thiab thaj chaw ua si. Txij li thaum DALI tswj qhov system tau tsim los ua haujlwm tsuas yog fader, nws hloov tsis tau lub teeb.

  • Kev tswj ceev

Thaum siv DMX maub los, muaj qhov sib txawv ntawm qhov nrawm nrawm npaum li cas. Lub fixture muab koj cov ntaub ntawv nyob rau hauv real-time los ntawm ib tug yooj yim interface. Vim txoj kev teeb tsa, cov ntaub ntawv no raug xa rov qab sai dua, ua rau nws muaj peev xwm tswj tau lub teeb tam sim ntawd. Txoj kev DALI, uas siv ob lub xov hlau, muaj kev ncua ntev txog 2 vib nas this. Lub sij hawm ncua ntev tsis ua rau nws nyuaj rau tswj qhov ci, tab sis nws yuav siv sij hawm ntev dua los sib piv cov txiaj ntsig.

  • Dimming

DALI qhov yooj yim dimming tswj muaj xws li ib tug slider thiab ib tug on/off khawm. Nrog rau DMX, koj muaj tib txoj kev xaiv rau ncua sijhawm, FX, thiab lub sijhawm ua ntej yuav ploj mus. Qhov sib txawv tseem ceeb yog tias DALI muaj lub teeb ceeb toom rau lub teeb uas tsis ua haujlwm zoo, thiab DMX tsis muaj txoj haujlwm no. Thaum nws los txog rau qhov yooj yim dimming tswj, DALI maub los yooj yim dua siv dua li DMX maub los ntau txoj hauv kev.

  • xws

DALI maub los zoo li tus tswj swb. Tus maub los yog lub thawv dub nrog lub hloov pauv uas tig nws rau thiab tawm thiab qee qhov zawv zawg tswj. Lub vaj huam sib luag DMX mus ntxiv tshaj qhov uas muaj kev tswj uas swb thiab preset khawm. Nws kuj cia koj tswj lub teeb pom kev zoo hloov thiab hloov cov xim. Ntxiv dua thiab, ob lub ntsiab controllers txawv heev ntawm ib leeg. Cov qauv teeb sib txawv thiab FX tuaj yeem ua nrog DMX's built-in presets.

  • Cov naj npawb ntawm lub teeb

Qhov no yog qhov sib txawv tseem ceeb ntawm ob qho no. DALI tuaj yeem tswj tau 64 lub teeb, tab sis DMX tuaj yeem tswj tau txog li 512 lub teeb thiab teeb tsa ib tus zuj zus (1 channel ib lub teeb). Txawm li cas los xij, muaj qhov laj thawj zoo meej rau qhov no. Lub teeb pom kev zoo DMX tswj cov teeb xim sib txawv uas tuaj yeem siv los ua kom muaj txiaj ntsig zoo. Tam sim no, kev sib tw kis las feem ntau siv teeb nyem kom tau txais cov neeg zoo siab. Tab sis DALI ua haujlwm zoo tshaj plaws thaum siv nrog ob qho tib si nyob rau hauv thiab sab nraum zoov teeb.

  • Lub teeb ceeb toom

Thaum lub teeb lub tsev txhab nyiaj tsis ua haujlwm, tus qauv ntse ntawm DALI ua rau lub teeb ceeb toom tuaj tam sim ntawd. Lub teeb tsis teb lossis tsis ua haujlwm zoo. Dimming LED teeb tuaj yeem yog lub cim qhia tias lub teeb tswj tau tawg. Qhov no yog ib tug zoo built-in feature uas vam tias yuav tsis tau siv. Lub DMX system tau teeb tsa kom lub interface system tau txais cov ntaub ntawv hauv lub sijhawm tiag tiag, txawm tias lub teeb tau teb.

  • Cov kab sib txawv

Lub interface xaim uas DMX siv yog CAT-5 cable. Qhov no yog li cas cov ntaub ntawv raug xa mus rau thiab tau txais los ntawm LED fixture. Tsis tas li ntawd, nws ua kom cov ntaub ntawv hais txog yuav ua li cas lub teeb ua haujlwm sai thiab yooj yim to taub. Koj tseem tuaj yeem hloov lub teeb pom kev zoo siv cov tswj vaj huam sib luag keyboards. Txawm hais tias DALI tsuas yog siv ob lub xov hlau, nws yuav siv sijhawm ntev dua rau lub teeb liab kom tau txais mus rau tus tswj hwm lub ntsiab.

  • Kev tswj cov nyhuv

DMX maub los yog tus yeej meej hauv kev tsim cov teebmeem uas sawv tawm. Nws muaj cov teebmeem ntxiv uas tuaj yeem tig txhua qhov kev ua si rau hauv LED teeb pom kev zoo. Thaum koj ntxiv LEDs uas hloov xim, koj tau txais ntau txoj kev xaiv zoo rau kev ua si siab. Nws kuj tuaj yeem siv nrog suab paj nruag los ua qee qhov chaw ntawm kev sib tw kis las sawv tawm. Nws yog tus tswj teeb pom kev zoo uas tuaj yeem ua rau qhov kev ua si zoo li tseem ceeb dua.

DMX512 Control Application

Cov ntawv thov rau DMX thiab DALI

  • Txoj Kev thiab Kev Loj

Teeb pom kev zoo yog qhov tseem ceeb ntawm kev tsav tsheb. Lub teeb pom kev zoo tso cai rau cov neeg tsav tsheb thiab cov neeg taug kev pom zoo ntawm txoj kev. Lub teeb mast siab tau teeb tsa ntawm lub sijhawm tsis tu ncua raws li kev sib txuas ntawm txoj kev loj kom ntseeg tau tias lub teeb pom kev zoo tib yam txhua qhov chaw. DMX teeb pom kev zoo yog siv rau ntawm txoj kev thiab txoj kev loj vim nws yooj yim rau siv.

  • Kev ua si nawv

Koj xav tau ntau yam teeb pom kev zoo rau ntau yam kev ua kis las, uas txhais tau hais tias DALI thiab DMX yog qhov kev xaiv zoo rau kev ua kis las kis las. Lub hom phiaj yog los xyuas kom meej tias ob qho tib si cov neeg tuaj saib thiab cov neeg ua si muaj lub sijhawm zoo thiab lub teeb tsis tshem tawm ntawm qhov ntawd.

Piv txwv li, DALI maub los thiab cov ncej siab yuav ua haujlwm zoo tshaj plaws rau lub tsev hais plaub ntaus pob tesniv. Qhov no muaj tseeb vim hais tias lub tsev hais plaub ntaus pob tesniv me me, ua kom yooj yim los tswj txhua lub teeb ntawm tus kheej.

Txoj hauv kev zoo tshaj plaws los txhim kho cov neeg saib kev paub ntawm thaj chaw yog siv DMX los tswj lub teeb. DMX ua haujlwm sai, thiab cov teebmeem tau zoo heev vim tias lub teeb xim tuaj yeem hloov tau sai, ua rau nws txaus siab rau cov neeg tuaj saib.

Ob leeg ntawm cov tswj lub teeb no yog cov kev xaiv zoo tshaj plaws rau kev ua kis las. Raws li qhov xav tau ntawm lub teeb pom kev zoo, qee qhov chaw ua kis las muaj qhov hloov pauv hauv ntau qhov chaw nyob ib puag ncig. Feem ntau, DALI tswj tsis nyob hauv thaj teb, tab sis DMX tswj yog.

  • Kev lag luam chaw

Hauv cov chaw lag luam xws li tshav dav hlau, cov ncej siab siab yuav tsum muaj ntau lub teeb rau lawv. Cov kev tswj rau lub teeb kuj tseem ceeb heev. Tsis tas li ntawd, txhua tus neeg hauv tshav dav hlau xav tau lub teeb txaus, suav nrog cov neeg tsav nkoj. Hauv kev teeb tsa kev lag luam, ob hom kev tswj lub teeb yog siv. Feem ntau, DMX tau pom zoo rau thaj chaw uas xav tau teeb pom kev zoo, thaum lub DALI tswj qhov system zoo dua rau thaj chaw uas xav tau lub teeb uas tuaj yeem hloov pauv.

DALI Tswj Daim Ntawv Thov

Tej yam yuav tsum tau xav txog thaum xaiv DMX thiab DALI Teeb pom kev zoo

  • Lub sijhawm ua haujlwm ntawm installation

Ib tus kws tshaj lij hluav taws xob yuav tsum teeb tsa DMX thiab DALI systems. Lub ntsiab maub los yuav tsum nyob ntawm ntau tshaj 300 meters los ntawm qhov chaw txuas mus. Qhov no suav nrog ntxiv kev tswj fader, uas cia koj lub teeb ci LED ploj mus rau hauv thiab tawm kom raug. Lub CAT-5 thaiv kev sib txuas yuav tsum tau koom nrog cov xaim tshwj xeeb yog tias siv DMX system. Nws yuav siv qee lub sijhawm los txuas txhua lub teeb kom ua haujlwm kom raug.

  • Hom teeb hloov xim

LED teeb tuaj yeem hloov xim tsuas yog nrog DMX system, tab sis koj lub chaw ntau pob yuav tsum txiav txim siab seb lub teeb RGB-LED siv. Cov teeb no tuaj yeem yog tsom teeb, teeb pom kev zoo, lossis ob qho tib si sib xyaw. Ua tsaug rau DMX system, koj tuaj yeem txuas mus txog 170 qhov sib txuas (3 channels ib lub teeb RGB), muab ntau chav rau koj loj hlob. Koj tuaj yeem ua cov xim uas koj xav tau nrog cov teeb no los ntawm kev sib xyaw peb xim. Vim tias lub teeb kub (hauv Kelvin) yog qhov tshwj xeeb rau kev ua kis las, lawv hloov tsis tau.

  • Tus nqi ntawm kev sib txuas

Ib tus kws tshaj lij hluav taws xob hauv lub chaw ntau pob yuav paub tias kev xaim feem ntau xav tau ob zaug ntau npaum li qhov yuav tsum tau ua. Ua ntej xaim pib, txhua lub teeb yuav tsum tau kuaj xyuas kom ntseeg tau tias nws muaj kev sib txuas zoo. Qhov no yog qhov uas feem ntau ntawm cov sij hawm txhuas yuav raug siv, ntau dua li lwm yam. Qhov no tseem yuav siv sijhawm los teeb tsa vim tias DALI system siv ob lub cables los txuas rau txhua qhov khoom siv.

  • Tus nqi ntxiv rau lub teeb

Thaum koj siv nyiaj rau kev ua kis las teeb pom kev zoo, koj tau txais txoj kev npaj mus sij hawm ntev kom tau koj cov nyiaj rov qab. LED teeb pom kev zoo muab cov txiaj ntsig zoo ntawm kev nqis peev hauv lub sijhawm ntev. Yog tias LED teeb pom kev zoo yuav tsum ua haujlwm zoo rau ntau tshaj 20 xyoo, cov nqi yuav suav tias yog siab. Txawm li cas los xij, nws raug nqi ntau dua los tsim lub chaw ua kis las ntau dua li nws yuav kav ntev. LED kis las teeb twb 100% tus nqi zoo vim tias lawv txuag tau txog 75% -85% ntawm cov nqi hluav taws xob.

FAQ

Cov lag luam feem ntau xaiv cov tsav tsheb dimmable raws li lawv cov qauv kev xaiv rau cov teeb pom kev ntse thiab lub zog txuag hluav taws xob. Dimmers txuag lub zog los ntawm kev cia cov neeg siv hloov pauv lub teeb ci li cas rau lawv nyiam. Feem ntau, cov neeg siv 0-10v analog dimming systems thiab DALI dimming systems.

Digital Multiplex (DMX) yog cov txheej txheem uas tswj cov khoom xws li teeb thiab pos huab. Txij li thaum lub teeb liab yog unidirectional, nws tsuas tuaj yeem txav los ntawm tus maub los, lossis thawj lub teeb, mus rau lub teeb kawg.

Txawm hais tias DMX yog siv los tswj cov pa luam yeeb thiab haze machines, yees duab, thiab ntau ntxiv ntawm cov teeb pom kev zoo hauv tsev uas siv cov teeb pom kev zoo LED, nws yog siv los tswj cov teeb pom kev zoo rau kev lom zem.

Txhua daim ntawm lub teeb pom kev zoo xav tau nws cov DMX raws hauv ib feem ntawm DMX ntug. Nrog rau cov channel no, koj tuaj yeem tswj hwm txhua yam ntawm lub teeb (feem ntau ntawm 12 thiab 30 channels).

Kab kab. Yog hais tias lub fixture flickers los yog tsis ua hauj lwm, thawj thiab yooj yim tshaj plaws ua yog xyuas cov xov hlau. Ntau yam teeb pom kev zoo thiab kev sib txuas teeb meem tshwm sim thaum tib neeg siv cov kab hluav taws xob tawg lossis tsis raug.

Basic Lighting tswj

Dimmer Hloov

Sensors

DALI Teeb pom kev zoo Control System

Networked Lighting Control

DMX specification hais tias qhov ntev tshaj plaws yog 3,281′, tab sis nyob rau hauv lub ntiaj teb no tiag tiag, txhua qhov txuas tuaj yeem ua rau lub teeb liab tsis muaj zog. Khaws koj cov cable khiav kom tsis pub tshaj 1,000 ko taw.

xaus

Sij hawm dhau mus, thev naus laus zis siv los tswj lub teeb tau zoo dua. DMX thiab DALI yog tus thawj coj. Ob lub tshuab no tuaj yeem ua haujlwm nrog ntau lub teeb LED. Koj txoj kev xaiv yuav tsum yog nyob ntawm lub hom phiaj koj xav mus cuag, thiab qhov project teeb pom kev zoo yuav tsum haum rau cov kev xav tau ntawm kev tswj hwm koj xaiv. Lwm qhov tseem ceeb uas yuav tau xav txog yog tias nws yuav raug nqi npaum li cas los teeb tsa. Tus kws tshaj lij teeb pom kev zoo tuaj yeem pab koj txiav txim siab seb qhov twg ntawm ob lub teeb pom kev zoo tshaj plaws rau koj. Tsis tas li ntawd, nco ntsoov tias nws muaj peev xwm muab ob qho tib si controllers rau hauv ib qho system.

LEDYi tsim cov khoom zoo LED strips thiab LED neon flex. Tag nrho peb cov khoom dhau los ntawm cov chaw soj nstuam high-tech los xyuas kom meej qhov zoo tshaj plaws. Dhau li ntawd, peb muab cov kev xaiv customizable ntawm peb LED strips thiab neon flex. Yog li, rau hwm LED sawb thiab LED neon flex, hu rau LEDYi ASAP!

Hu rau peb tam sim no!

Tau txais cov lus nug lossis kev tawm tswv yim? Peb xav hnov ​​los ntawm koj! Tsuas yog ua daim foos hauv qab no, thiab peb pab pawg phooj ywg yuav teb ASAP.

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Nkag mus rau hauv peb 720-nplooj eBook, npog txhua yam ntawm LED sawb ntau lawm los xaiv qhov zoo tshaj plaws rau koj cov kev xav tau.