Lub hauv paus ntawm LCD ncaj qha -lit backlight uniformity optimization txoj kev yog los kho txoj hauj lwm thiab txoj kab uas hla ntawm lub teeb - emitting aperture nyob rau hauv lub opaque diffuser zaj duab xis kom optimize qhov ratio ntawm lub teeb ncaj qha emission rau theem nrab reflection, yog li txhim kho qhov tsaus ntuj teeb meem nyob rau hauv lub cheeb tsam LED kis thiab txhim kho tag nrho brightness uniformity.
I. Direct-lit Backlight Structure thiab Uniformity Challenges
Lub teeb ncaj qha -lit backlight muaj cov kua siv lead ua kua txheej, lub pob tshab diffuser zaj duab xis, opaque diffuser zaj duab xis, LEDs, thiab cov yeeb yaj kiab zoo. Nws txoj haujlwm ua haujlwm yog raws li hauv qab no:
LEDs: Muab thawj qhov ci ci raws li qhov chaw teeb pom kev zoo.
Diffuser zaj duab xis: nthuav lub kaum sab xis thiab thaj tsam ntawm lub teeb los ntawm kev tawg.
Reflective zaj duab xis: Reflects tsis muaj teeb pom kev zoo rov qab rau hauv lub cev, txhim kho luminous efficiency.
Lub hauv paus ua rau muaj teeb meem tsis sib xws: Vim tias thaj tsam LED sib txawv nyob deb ntawm lub teeb ci, lub teeb tsis diffuse txaus ua ntej nkag mus rau hauv cov yeeb yaj kiab diffuser, ua rau thaj chaw tsaus. Thawj qhov kev simulation tshwm sim qhia qhov sib txawv tseem ceeb hauv qhov ci ntawm qhov sib txawv ntawm LED thiab thaj chaw emitting, ncaj qha cuam tshuam rau cov nyhuv tso saib.
II. Uniformity Optimization Method: Kho lub teeb Emission Aperture Parameters
1. Txoj Cai Ua kom zoo
Los ntawm kev kho qhov chaw thiab txoj kab uas hla ntawm lub teeb emission aperture nyob rau hauv opaque diffusion zaj duab xis, lub teeb propagation txoj kev yog hloov:
Txo cov hluav taws xob ncaj qha emission: zam lub teeb tsis txaus nyob rau hauv qhov sib txawv vim yog lub teeb ncaj qha LED.
Kev nce ntxiv ntawm lub teeb pom kev sib txawv: Kev taw qhia lub teeb los ntawm txoj kev "LED → opaque diffusion film → reflective film → light emission," cia qhov chaw sib txawv kom tau txais ntau lub teeb.
Theoretical Basis: LED lub teeb siv yog inversely proportional rau lub square ntawm qhov kev ncua deb, thiab tus nqi ntawm lub teeb emission yog ncaj qha proportional rau lub square ntawm lub aperture txoj kab uas hla.
Lub aperture txoj kab uas hla yuav tsum ncaj qha proportional rau qhov kev ncua deb ntawm lub aperture chaw rau lub LED kom ua tau brightness uniformity.
2. Cov kauj ruam hloov kho tshwj xeeb
Aperture Position: Hloov txoj hauj lwm aperture mus rau thaj tsam LED qhov sib txawv kom nce lub teeb tau txais hauv cheeb tsam ntawd.
Aperture Diameter: Dynamically kho txoj kab uas hla raws li qhov kev ncua deb ntawm lub aperture mus rau LED; qhov deb dua, qhov loj dua txoj kab uas hla. Piv txwv li: Yog hais tias thawj txoj kab uas hla yog 2 hli, thaum qhov kev ncua deb nce los ntawm 50%, txoj kab uas hla yuav raug kho rau 2.8 hli (xws li proportionally).
III. Optimization Effect Verification
1. Thawj qhov simulation tshwm sim
Qhov chaw LED qhov sib txawv ua rau pom qhov chaw tsaus ntuj tseem ceeb, ua rau lub teeb ci tsis zoo.
2. Cov txiaj ntsig tau zoo
Txhim kho Brightness Uniformity: ** Lub ci ci ntawm thaj chaw sib txawv tam sim no nyob ze rau ntawm thaj chaw emitting, ua kom zoo dua qub.
Cov teeb meem seem: Cov cheeb tsam me me tseem muaj nyob hauv thaj chaw emitting, tab sis cov no tuaj yeem txo tau los ntawm kev kho lub teeb ntxiv -emitting aperture tsis (tag nrho qhov ci yuav tsum tau txiav txim siab).
IV. Method Advantages thiab Application Value
Tus nqi siab-Kev ua tau zoo: Tsis tas yuav tsum muaj qhov tshiab lossis hloov pauv; tsuas yog tus uas twb muaj lawm diffuser zaj duab xis tsim xav tau kev hloov kho.
High Degree ntawm Optimization Freedom: Txoj hauj lwm thiab txoj kab uas hla ntawm lub teeb -emitting aperture tuaj yeem hloov kho kom haum raws li qhov xav tau ntawm cov teeb pom kev sib txawv.
Engineering Practicality: Txheeb xyuas los ntawm Speos simulation, nws tuaj yeem siv ncaj qha rau kev tsim cov khoom tsim.
V. Xaus
Txoj kev ua kom zoo sib xws uas tau hais hauv daim ntawv no ua tau zoo daws qhov teeb meem ntawm cheeb tsam tsaus ntuj hauv thaj tsam LED qhov sib txawv ntawm qhov ncaj qha -lit backlights los ntawm kev tswj lub teeb kom meej -emitting aperture parameters ntawm opaque diffuser zaj duab xis. Txoj kev no sib txuas cov theoretical nruj nrog engineering operability, muab ib qho tseem ceeb siv rau LCD backlight tsim.
