Nūhou

He aha ke LED?

ʻO ke kukui LED no "Light Emitting Diode." He mea semiconductor ia e hoʻopuka ana i ka mālamalama i ka wā e hele ai ke au uila i loko. Hoʻohana ʻia nā LED ma kahi ākea o nā noi, me nā kukui, nā hōʻike, nā hōʻailona, a me nā mea hou aku. ʻIke ʻia lākou no ko lākou ikaika ikaika, kūpaʻa, a me ke ola lōʻihi e hoʻohālikelike ʻia me nā ʻōpuʻu incandescent a i ʻole fluorescent. Hiki mai nā LED i nā waihoʻoluʻu like ʻole a hiki ke hoʻohana ʻia i nā ʻano huahana like ʻole, mai nā kukui hōʻailona maʻalahi a hiki i nā hōʻike uila uila a me nā mea uila.

ʻO ke kumu o ke kukui LED

Ke hoʻohui hou nā electrons a me nā puka i ka PN junction o ka diode light-emitting diode, hoʻololi nā electrons mai kahi kiʻekiʻe o ka ikehu a hiki i kahi haʻahaʻa haʻahaʻa, a hoʻokuʻu nā electrons i ka ikehu nui ma ke ʻano o nā photons emitted (nā hawewe electromagnetic), ka hopena electroluminescence. ʻO ke kala o ka ʻālohilohi e pili ana i nā mea waiwai i hoʻokumu i kona kumu. ʻO nā mea nui e like me ka gallium arsenide diode e hoʻokuʻu i ke kukui ʻulaʻula, gallium phosphide diode emits i ke kukui ʻōmaʻomaʻo, silicon carbide diode emits i ke kukui melemele, a me ka gallium nitride diode e hoʻopuka i ke kukui uliuli.

Hoʻohālikelike kumu māmā

LED: kiʻekiʻe electro-optical hoʻololi pono (kokoke 60%), ʻōmaʻomaʻo a me ke kaiapuni, ola lōʻihi (a hiki i 100,000 hola), haʻahaʻa haʻahaʻa haʻahaʻa (e pili ana i 3V), ʻaʻohe pohō o ke ola ma hope o ka hoʻololi pinepine ʻana, liʻiliʻi liʻiliʻi, haʻahaʻa wela wela. , ʻōlinolino kiʻekiʻe, ikaika a paʻa, maʻalahi ke poʻo, nā waihoʻoluʻu like ʻole, concentrated and stable beam, ʻaʻohe lohi i ka hoʻomaka.
ʻO ke kukui uila: haʻahaʻa electro-optical hoʻololi maikaʻi (e pili ana i 10%), pōkole ke ola (e pili ana i 1000 mau hola), kiʻekiʻe wela wela, hoʻokahi kala a me ka wela haʻahaʻa.
Nā kukui uila: haʻahaʻa haʻahaʻa electro-optical hoʻololi maikaʻi (e pili ana i 30%), pōʻino i ke kaiapuni (loaʻa nā mea ʻino e like me ka mercury, ma kahi o 3.5-5mg/unit), ʻaʻole hiki ke hoʻololi ʻia (ʻaʻole hiki ke kukui haʻahaʻa), radiation ultraviolet, flickering phenomena, lohi hoʻomaka-hoʻolohi, ke kumu kūʻai o ka honua makaʻala mea piʻi, hoʻololi hou pili i ke ola, a me ka leo nui. ka lōʻihi o ke ola, a loaʻa nā pilikia hoʻopau wela. Hoʻohana nui ʻia lākou no nā kukui waho.

ʻO nā pono o LED

ʻO LED kahi puʻupuʻu liʻiliʻi liʻiliʻi i hoʻopili ʻia i ka resin epoxy, no laila liʻiliʻi a māmā. ʻO ka mea maʻamau, ʻo ka volta hana o LED he 2-3.6V, ʻo ka hana o kēia manawa ʻo 0.02-0.03A, a ʻoi aku ka nui o ka hoʻohana ʻana i ka mana ma mua o
0.1W. Ma lalo o ka uila paʻa a kūpono a me nā kūlana hana o kēia manawa, hiki i ke ola lawelawe o nā LED ke lōʻihi e like me 100,000 mau hola.
Hoʻohana ʻo LED i ka ʻenehana luminescence anuanu, kahi e hoʻoulu ai i ka wela haʻahaʻa ma mua o nā kukui kukui maʻamau o ka mana like. Hana ʻia nā LED me nā mea ʻawaʻawa ʻole, ʻaʻole like me nā kukui fluorescent i loaʻa ka mercury, hiki ke hoʻohaumia. I ka manawa like, hiki ke hana hou a hoʻohana hou ʻia nā LED.

ʻO ka hoʻohana ʻana o LED

Ke hoʻomau nei ka ʻenehana LED i ka ulu ʻana a me ka hoʻomohala wikiwiki ʻana, ʻoi aku ka nui o nā noi LED i ko mākou ola i kēlā me kēia lā. Hoʻohana nui ʻia nā LED i nā hōʻike LED, nā kukui kaʻa, nā kukui automotive, nā kumu kukui, nā mea hoʻonani kukui, nā backlight LCD, etc.

Kūkulu ʻia o LED

ʻO LED kahi puʻupuʻu kukui, bracket a me nā uea i hoʻopili ʻia i ka resin epoxy. He māmā, ʻaʻohe mea ʻawaʻawa a maikaʻi ke kūpaʻa haʻalulu. Loaʻa i ka LED kahi ʻano conduction ala hoʻokahi, a i ka wā i kiʻekiʻe loa ka volta hoʻohuli, e hōʻeha ia i ka LED. Hōʻike ʻia ke ʻano haku mele nui ma ke kiʻi: