YLCD vs LED
LED thiab LCD yog ob lub thev naus laus zis uas tau siv dav hauv ntau qhov chaw. LED txhais tau tias Lub Teeb Emitting Diode, uas yog ib qho khoom siv hluav taws xob. LCD txhais tau tias Liquid Crystal Display, uas yog cov khoom siv ntau yam khoom siv. Ob qho tib si ntawm cov khoom siv no yog siv rau hauv cov ntawv zoo sib xws thiab sib txawv xws li TV, ntsuas ntsuas, ntsuas ntsuas, thiab lwm yam. Nws yog ib qho tseem ceeb heev kom muaj kev nkag siab zoo hauv cov ntsiab lus thiab kev ua haujlwm ntawm LCDs thiab LEDs txhawm rau kom muaj kev nkag siab zoo ntawm cov teb no. Hauv tsab xov xwm no, peb yuav tham txog dab tsi LED thiab LCD yog, lawv cov khoom, kev siv ntawm LCDs thiab LEDs, lawv cov haujlwm, qhov sib xws ntawm LCD thiab LED, thiab thaum kawg qhov txawv ntawm LED thiab LCD.
LED
LED sawv rau Lub Teeb Emitting Diode. LED yog ib tug semiconductor diode. Ib tug semiconductor diode muaj p – hom thiab n – hom semiconductor, uas yog ib tug ntshiab semiconductor doped nrog ntau npaum li cas ntawm txawv impurities. Ob qho no txuas ua ke. Hauv cheeb tsam sib txuas, cov nqi tsis zoo (electrons) nyob rau sab n yog ua ke nrog cov nqi zoo tshaj (qhov) ntawm p. Qhov no tsim ib cheeb tsam nruab nrab nrog ib qhov dav me me nyob ib ncig ntawm qhov kev sib tshuam. Lub cheeb tsam no yog hu ua cheeb tsam depletion los yog depletion txheej. Thaum lub zog hluav taws xob muaj zog txaus los kov yeej qhov muaj peev xwm cuam tshuam ntawm thaj tsam depletion yog siv thoob plaws qhov sib txuas lub qhov thiab cov hluav taws xob rov ua kom lub zog tso tawm. Tus nqi ntawm lub zog yog txiav txim los ntawm lub zog sib txawv ntawm p hom thiab n hom. Rau lub emission ntawm lub zog, cov ntshiab semiconductors ntawm sab p thiab n sab yuav tsum sib txawv ntawm lub zog. LEDs tau siv dav hauv TVs tam sim no, vim tias lawv siv lub zog qis thiab tuaj yeem muab qhov ci ntsa iab thiab qhov sib txawv.
NYIAJ LCD
LCD sawv cev rau Cov Khoom Siv Ua Kua Crystal. LCDs tau los ua ib qho kev hloov tshuab rau cov raj cathode loj thiab hnyav. Tam sim no feem ntau ntawm cov khoom siv me me thiab TVs muaj LCD thev naus laus zis. LCDs yog tsim raws li lub teeb modulating zog ntawm cov kua siv lead ua kua. Cov kua ua kua tsis tuaj yeem tawm lub teeb los ntawm lawv tus kheej. Cov LCDs tswj lub teeb los ntawm lub teeb rov qab los tsim cov duab xav tau. LCDs tuaj yeem yog monochromatic lossis xim. LCDs siv lub zog tsawg dua li CRT cov lus qhia; yog li ntawd, lawv yog cov zoo rau cov khoom siv portable. Cov vaj huam sib luag me me muaj nyob rau hauv yooj yim los siv raws li ntsuas ntsuas thiab hloov rau xya ntu qhia.
Qhov txawv ntawm LCD thiab LED yog dab tsi?
• LCD yog ib qho khoom siv, uas muaj ntau qhov chaw whereas LED yog ib qho khoom siv.
• LCD tsuas yog siv los ua cov cuab yeej tso saib, qhov LEDs yog siv rau hauv ntau yam kev siv xws li teeb nyem thiab ntsuas. LEDs muaj peev xwm tsim lub teeb thaum cov kua siv lead ua tsis tuaj yeem tsim lub teeb. LED zaub siv lub zog tsawg dua li cov LCDs tib yam.
• LCD tsuas yog siv los ua cov cuab yeej tso saib xwb, qhov LEDs yog siv rau hauv ntau yam kev siv xws li teeb nyem thiab ntsuas.
• LEDs muaj peev xwm tsim lub teeb thaum cov kua siv lead ua kua tsis tuaj yeem tsim lub teeb.
• LED qhia siv lub zog tsawg dua li cov LCDs tib yam.
• Hauv cov khoom tsim tawm tsis ntev los no, LEDs tau siv los ua lub teeb rov qab rau LCDs.
• LED zaub tuaj yeem tsim qhov ci ntsa iab ntau dua thiab qhov sib txawv tom qab ntawd cov khoom siv LC.
