Kodi kusiyana pakati pa Gob ndi COB ndi kotani?

Mu dziko la ukadaulo wa LED, mawu akuti GOB ndi COB nthawi zambiri amakambidwa poganizira ma module a LED ogwira ntchito bwino pa ntchito zosiyanasiyana. Maukadaulo awiriwa a LED opaka ndi ofunikira kwambiri pakutsimikizira kulimba, kugwira ntchito bwino, komanso kuwala kwa magetsi a LED. Komabe, ngakhale kuti GOB ndi COB onse amatanthauza njira zoyikira ma chips a LED, amasiyana kwambiri pankhani ya kapangidwe kake, kugwiritsa ntchito, ndi magwiridwe antchito.

A. Kodi COB (Chip on Board) ndi chiyani?Chophimba cha LED?

COB (Chip on Board) ndi ukadaulo womwe umagwiritsidwa ntchito kuyika ma tchipisi angapo a LED mwachindunji pa substrate popanda kulongedza kwachikhalidwe. Mu COB LED yachizolowezi, ma tchipisi angapo a LED amalumikizidwa ku bolodi limodzi kapena substrate, zomwe zimapangitsa kuti pakhale kapangidwe kakang'ono komanso kogwira mtima. Ma COB LED amapereka kuwala kwakukulu pamalo ang'onoang'ono, zomwe zimapangitsa kuti akhale yankho labwino kwambiri pakugwiritsa ntchito magetsi apamwamba komanso amalonda.

1. Kapangidwe ndi Mfundo Yogwirira Ntchito:

Mu COB LED, ma LED chips ndi awa:

- Yoyikidwa mwachindunji pa substrate: Ma chips a LED amayikidwa pa maziko, omwe nthawi zambiri amakhala ndi zinthu zokhala ndi kutentha kwabwino, monga aluminiyamu, kuti zithandize kutulutsa kutentha bwino.

- Yolumikizidwa ndi magetsi: Ma chips amalumikizidwa mwachindunji ku bolodi, zomwe zimathandiza kuti magetsi aziyenda bwino komanso kuti mphamvu zigawidwe bwino.

- Kusamalira kutentha: Ma LED a COB nthawi zambiri amagwiritsa ntchito ma PCB achitsulo (MCPCB), omwe amathandiza kuyeretsa kutentha ndikuwonjezera moyo wautali komanso magwiridwe antchito a ma LED.

Ukadaulo wa COB ndi wotchuka kwambiri mu mapulogalamu owonetsera zamalonda, monga kutsatsa mkati, kutsatsa panja, ndi misonkhano, chifukwa umalola kuwala kwakukulu komanso kufanana kwa kuwala.

(1) Kuwala Kwambiri: Ma LED a COB amapanga kuwala kwakukulu ndipo amapereka kuwala kwabwino kwambiri, zomwe zimapangitsa kuti azigwiritsidwa ntchito powunikira kwakukulu.

(2) Kusamalira Kutentha Bwino: Kuyika ma chips mwachindunji pa zinthu zoyendetsera kutentha kumaonetsetsa kuti kutentha kumachotsedwa bwino, kuchepetsa chiopsezo cha kutentha kwambiri komanso kukonza moyo wautali wa ma LED.

(3) Kapangidwe Kakang'ono: Ma chips angapo a LED amalumikizidwa pamodzi, zomwe zimapangitsa kuti kuwala kukhale kowala kwambiri m'dera laling'ono, zomwe ndi zabwino kwambiri pakugwiritsa ntchito komwe kumafuna kuunikira kofanana komanso kowala kwambiri.

(4) Kulimba ndi Kudalirika: Ma LED a COB nthawi zambiri amakhala olimba kuposa ma LED a SMD, chifukwa ma chips amakhala olimba ndipo sangawonongeke mosavuta ndi kugwedezeka kapena kugwedezeka.

3. Zoyipa za ma LED a COB:

(1) Mtengo Wokwera: Ma LED a COB nthawi zambiri amakhala okwera mtengo chifukwa cha njira yopangira yapamwamba komanso zipangizo zapamwamba zomwe zimagwiritsidwa ntchito posamalira kutentha.

(2) Kusinthasintha Kochepa: Ma LED a COB nthawi zambiri amagwiritsidwa ntchito pa ntchito zolimba (monga zowunikira zokhazikika) ndipo sasinthasintha ngati ma LED a SMD, omwe amatha kuyikidwa pa ma PCB osinthasintha.

B. Kodi GOB (Guluu pa Bodi) ndi chiyani?

GOB (Glue on Board) ndi ukadaulo watsopano wa LED womwe umakulitsa ukadaulo wa COB wachikhalidwe pogwiritsa ntchito chophimba chowonjezera choteteza kapena guluu pa chip cha LED, chomwe chimathandizira kulimba ndi kudalirika kwa LED. GOB idapangidwa kuti ipewe kuwonongeka kwa chip cha LED kuchokera kuzinthu zakunja monga fumbi, chinyezi, ndi kugwedezeka.

Mu dongosolo la GOB, ma LED chips atayikidwa pa PCB (monga momwe zimakhalira ndi COB), guluu woteteza wa epoxy kapena silicon umayikidwa pamwamba pake. Gawoli limathandiza:

- Tetezani tchipisi ta LED ku kuwonongeka kwa chilengedwe (fumbi, chinyezi, dzimbiri).

- Limbikitsani kutulutsa kwa kuwala ndi magwiridwe antchito mwa kuchepetsa kuyamwa kwa kuwala komwe kungachitike mukakhazikitsa bwino.

- Wonjezerani kudalirika mwa kuonetsetsa kuti ma LED chips amakhalabe pamalo awo komanso akugwira ntchito kwa nthawi yayitali, ngakhale pakakhala zovuta.

Guluu wogwiritsidwa ntchito mu ukadaulo wa GOB umathandizanso kuti kuwala kukhale kofanana komanso mtundu wake ukhale wofanana, zomwe ndizofunikira kwambiri pakugwiritsa ntchito monga Ma LED Owonetsera ndi zizindikiro zazikulu.

1. Kapangidwe ndi Mfundo Yogwirira Ntchito:

- Ma chips a LED amaikidwa pa substrate (monga PCB) monga momwe zimakhalira mu COB.

- Guluu kapena epoxy imayikidwa pamwamba pa tchipisi kuti iteteze ndikutseka, zomwe zimapangitsa kuti gawolo ligwire bwino ntchito.

- Kuteteza bwino chilengedwe: Guluuyu amapanga chotchinga chomwe chimateteza chinyezi, fumbi, ndi zinthu zina zodetsa zomwe zingawononge magwiridwe antchito a chip pakapita nthawi.

GOB imagwiritsidwa ntchito kwambiri m'mapulogalamu otsatsa malonda akunja komanso m'malo omwe ma LED angakumane ndi nyengo, monga zowonetsera zakunja, magetsi amisewu, ndi makina owunikira a mafakitale olimba kwambiri.

2. Ubwino wa ma LED a GOB:

(1) Kulimba Kwambiri: Guluu woteteza umaonetsetsa kuti ma LED chips amatetezedwa bwino ku zoopsa zachilengedwe, zomwe zimapangitsa kuti ma GOB LEDs akhale oyenera kugwiritsidwa ntchito panja komanso m'mafakitale.

(2) Kugawa Bwino Kuwala: Guluuyu angathandize kupititsa patsogolo kufalikira kwa kuwala ndikuchepetsa mawonekedwe amdima kapena kutulutsa kwa kuwala kosagwirizana, zomwe zimapangitsa kuti kuwala kukhale kofanana.

(3) Kukana Chinyezi ndi Fumbi: Ukadaulo wa GOB umawonjezera kukana kwa LED ku chinyezi, fumbi, ndi zinthu zina zodetsa, zomwe zimapangitsa kuti ikhale ndi moyo wautali komanso kukonza magwiridwe antchito m'malo ovuta.

(4) Kudalirika Kowonjezereka: Mwa kuyika ma LED chips pamalo pake ndi wosanjikiza woteteza, ma GOB LED sangawonongeke kwambiri ndi mphamvu zakuthupi zakunja, monga kugwedezeka kapena kugwedezeka.

3. Zoyipa za ma LED a GOB:

(1) Mtengo Wokwera: Mofanana ndi ma LED a COB, ma LED a GOB ndi okwera mtengo kwambiri chifukwa cha njira zina zopangira ndi zipangizo zomwe zimagwiritsidwa ntchito panthawiyi.

(2) Kusinthasintha Kochepa: Monga ma LED a COB, ma LED a GOB nthawi zambiri amagwiritsidwa ntchito m'malo olimba ndipo sangakhale osinthika kwambiri ndi mapulogalamu osinthasintha.

(3) Kutayika Kotheka kwa Optical: Guluu nthawi zina ungayambitse kuchepa pang'ono kwa magwiridwe antchito a optical, chifukwa umatha kuyamwa kuwala pang'ono, ngakhale kuti zotsatira zake ndizochepa poyerekeza ndi zabwino zake.