Backlight lub cev lub cev raws li kev siv hluav taws xob: kev sib raug zoo ntawm lub teeb thiab tam sim no.
Hais txog kev siv hluav taws xob los ntawm kev siv hluav taws xob rov qab; muaj cov ntsiab cai dav dav uas tuaj yeem kos los ntawm physics: yog tias koj saib seb nws siv zog npaum li cas, qhov tseem ceeb ntawm no yog lub zog tsav tam sim no yuav tau txais. Feem ntau ntawm qhov no tseem siv tau rau LCD / Mini LED backlights: LCD xav tau cov teeb pom kev zoo raws li qhov pib, mini-LED tsim cov cheeb tsam ntawm cov teeb pom kev zoo siv cov kab ntom ntom ntawm micro-LED chips yog li tag nrho cov nyiaj tau siv nyob ntawm seb muaj pes tsawg tus tau hloov mus rau lawv qib tam sim no.
Feem ntau thaum kuv tab tom ua si qee cov yeeb yaj kiab HDR ntawm kuv 85-nti mini coj TV kuv yuav haus txog 400w yog tias tag nrho cov teeb rov qab muab faib rau thiab tag nrho brithness uas yog txog 1000nits. Tab sis ib zaug peb hloov mus rau hauv sdr thiab ces dim tej yam mus txog ib ncig ntawm ob puas watts nws mus down heev, los ntawm heev heev tiag tiag, yog li nyob ib ncig ntawm kaum ob tam sim no. Kev sib piv qhia peb ntau npaum li cas ntawm qhov cuam tshuam qhov ci ntsa iab nrog kev siv lub zog.
Dynamic dimming thev naus laus zis: kev tswj xyuas kom meej, suav nrog thoob plaws ntiaj teb, lossis ntawm nws qib granular.
Txhawm rau rhuav "high brightness=siab zog noj", kev lag luam tau tsim ntau-theem dynamic dimming tshuab uas sib npaug qhov ci thiab kev siv hluav taws xob los ntawm kev txheeb xyuas cov duab thiab cov ntsiab lus teeb pom kev zoo hauv lub sijhawm tiag -.
Ntiaj teb no dynamic dimming (LABC).
Lub teeb adaptive brightness tswj (LABC) yog tswj los ntawm ambient brightness los ntawm sensors, ces kho lub brightness raws li cov algorithms. Piv txwv li:
Dark envrionment scenario Thaum Ambient Light < 100 lux Backlight brightness yuav poob mus rau 50 nts qab nws txo hwj chim los ntawm 60%
Lub teeb muaj zog: sab nraum zoov nyob rau hauv lub hnub ncaj qha, rov qab lub teeb ci tau tsa yav dhau los 800nits kom tswj tau qhov kev pom zoo ntawm lub vijtsam.
Kev siv: Lub teeb sensor hloov lub teeb teeb liab mus rau hauv hluav taws xob. Lub nti tsav tsheb qhia txog qhov ci ntsa iab zoo tshaj plaws ntawm kev suav PID. Nws ua haujlwm ntawm PWM dimming mechanism thiab. Raws li qee cov ntaub ntawv ntawm cov tuam txhab smartphone, LABC thev naus laus zis tuaj yeem txo qis ntawm -siv lub zog siv los ntawm 15%-20% tib lub sijhawm, txhim kho tib neeg kev pom ntawm lawv cov ntxaij vab tshaus zoo dua.
Hauv zos Dimming
LCD & mini LED lub teeb pom kev tuaj yeem siv lub tshuab dimming hauv zos uas tuaj yeem ua rau cov zaub muaj qhov sib txawv zoo ntawm "cov chaw ci ntsa iab ntau dua li ib txwm thiab cov chaw tsaus nti ntau dua" los ntawm kev hloov qee qhov ntawm lub teeb rov qab lub zog tsis tas siv zog ntau dhau ua ke. Zoo li piv txwv:
Mini LED rov qab lub teeb yog lub vijtsam faib ua ntau pua mus rau txhiab qhov chaw thiab txhua tus muaj nws tus kheej tswj cov coj tam sim no. Kev pom cov duab dub tuaj yeem tua qhov sib txuam ntawm qhov LED los tsim "tseeb dub" thiab txuag lub zog.
Sab nkag LCD backlight: Los ntawm optimizing lub teeb faib los ntawm kev siv dot qauv ntawm lub teeb qhia phaj thiab txuas nrog dynamic dimming algorithm kom tig lub teeb rov qab thaum nws tab tom pom cov ntsiab lus tsaus.
Cov ntaub ntawv txhawb nqa: tom qab siv 2000 cheeb tsam hauv zos dimming, 65 nti mini coj TV txuag 35% ntau zog dua li yog tias nws nyob hauv lub ntiaj teb dimming hom rau cov ntsiab lus tsaus nti thiab kuj nce qhov sib piv ntawm 1000000: 1.
ContentAdaptive Control (CABC): Daim ntawv qhia txog kev hloov pauv.
Cov ntsiab lus adaptive brightness tswj (CABC) yog ua kom muaj zog tswj ntawm Backlight siv thiab Pixel greyscale uas yuav txheeb xyuas qhov ci ntsa iab ntawm kev nthuav tawm cov ntsiab lus thiab tau txais kev sib haum xeeb ntawm "tsis hloov pauv" thiab "txuag lub zog". Core logic nyob ntawm no:
Cov duab tsom xam: Tsav lub nti los suav cov histogram ntawm daim duab thiab nrhiav qhov sib faib ntawm lub teeb thiab qhov tsaus ntuj.
Backlight kev hloov: txo qis backlight siv raws li cov ntsiab lus lub teeb ci, xws li los ntawm 100% mus rau 70%.
Pixel them nyiaj: nce qib grey ntawm pixels xws li qhov nce ntawm (100,100,100) → (140,140,140) kom ci ntsa iab vim qhov qis qis.
Application Scenario:
Cov duab zoo li qub: Cov duab / Cov Ntaub Ntawv tau tso tawm nrog qhov txo qis ntawm 30% hauv qab ntawm CABC, tab sis cov duab tseem nyob li ci ntsa iab los ntawm pixel them nyiaj.
Dynamic Video: HDR lub ncov luminance nrog cabc, nws yuav ua rau nws nce me ntsis tab sis tseem me ntsis, rau cov scenes uas muaj ntau yam nthuav dav peb xav pom ntau ntxiv thiab tom qab ntawd peb kuj tso rov qab rau lub backlights uas tsis ua dab tsi.
Cov Ntaub Ntawv Kev Lag Luam: Tom qab siv CABC thev naus laus zis, lub khoos phis tawj ntsiav tshuaj uas siv lub vev xaib siv 18% tsawg zog thiab cov yeeb yaj kiab yog 12% ua haujlwm zoo dua, cov neeg siv khoom tsis pom qhov teeb meem zoo.
Material & Circuits Innovation: Txiav kev siv hluav taws xob los ntawm nws cov hauv paus hniav.
Innovation nyob rau hauv kho vajtse kuj yuav tsum tau muab coj mus rau hauv tus account tsuas yog nyob rau hauv cov nqe lus ntawm software algorithms. Kev lag luam ua rau nws cov kev txhim kho nyob rau hauv daim ntawv ntawm lub zog efficiency tau nce los ntawm kev txhim kho ntawm cov khoom siv rau cov backlights siv, thiab nyob rau hauv yuav ua li cas nws tau ua thiab dab tsi yog siv.
Efficient Luminescent Khoom
Quantum dots: qhwv xiav LED nyob rau hauv quantum dot zaj duab xis yog li nws muab tawm tsuas yog liab thiab ntsuab heev teeb tsa lub teeb ci (lm / W), qis zog siv los ntawm lub teeb nraub qaum. Backlight efficiency: Ib qho quantum-dot LCD TV muaj 25% siab dua backlight effi- ciency dua li traditi onal ib;
Mini LED nti: siv lub flip nti qauv kom cov electrode cuam tshuam txo thiab qhov luminous efficiency yog nce. Mini LED nti los ntawm ib lub tuam txhab muaj qhov ua tau zoo ntawm 200lm / W uas yog 40% ntau dua li cov LEDs li niaj zaus.
Txhim kho Boost Drive Circuit
Backlight tsav Circuit Court nrog nce voltage siv switching fais fab mov technology uas nws efficiency cuam tshuam tus nqi ntawm lub hwj chim noj. Kev lag luam yuav ua cov hom optimizations rau kev txhim kho:
Synchronous Rectification Techni-que: Siv MOSFET's es tsis yog Diode's kom poob qis, siab dua e±ciency> 95%.
Dynamic dimming zaus: hloov qhov zaus ntawm PWM raws li koj xav tau, txo qis nrog lub teeb ci tsawg kom koj tuaj yeem txo qhov kev poob qis.
Intelligent Current Control: Kho lub LED tam sim no hauv tiag- lub sij hawm siv lub voj voog tawm tswv yim kom tsis txhob nkim lub zog los ntawm kev tsav tsheb dhau ntawm LEDs.
Case: Tom qab siv GaN tsav nti, lub backlight tsav efficiency ntawm qee lub xov tooj ntse nce mus rau 92% los ntawm 85% thaum nws yog 500nits. Nyob rau tib lub sijhawm, lub zog txuag yog nyob ib ncig ntawm 0.3w.
