Osnovna načela in prednosti vira osvetlitve LED
LED, also known as light emitting diode, is a semiconductor device that can convert electrical energy into light energy. LED backlight uses a large number of LED beads arranged and combined in a specific way to provide uniform and stable light for LCD screens. Compared with traditional backlight sources such as cold cathode fluorescent lamps (CCFLs), LED backlight sources have many pomembne prednosti .
In terms of luminous efficiency, the luminous efficiency of LED backlight is much higher than that of CCFL. CCFL loses a significant amount of energy in the form of thermal energy during operation, while LED can almost convert most of the electrical energy into light energy. This means that LED backlight sources consume less electrical energy while providing the same brightness, directly improving the energy efficiency of medical LCD zasloni .
In terms of lifespan, LED backlight sources also perform well. The lifespan of CCFL is usually around 15000-20000 hours, while the lifespan of LED backlight can reach 50000 hours or even longer. The longer service life reduces the frequency of backlight replacement, lowers equipment maintenance costs and downtime, and further improves the energy efficiency of medical LCD screens from a Dolgoročna perspektiva uporabe, saj se izogne dodatni porabi energije in stroškov dela, ki jih povzroči zamenjava osvetlitve ozadja .
Specifična učinkovitost vira osvetlitve LED pri izboljšanju energetske učinkovitosti medicinskih LCD zaslonov
Natančna prilagoditev svetlosti
Medicinsko delo ima izjemno stroge zahteve za svetlost prikaza, različni pregledni predmeti in delovna okolja pa zahtevajo različne nastavitve svetlosti . Viri LED osvetlitve LED imajo odlične sposobnosti prilagajanja svetlosti, kar omogoča neprekinjeno in natančno prilagoditev iz izjemno nizke svetlosti v skladu z visoko svetlostjo {{1}. Odpadki . Na primer, zmanjšanje svetlosti ponoči ali v slabih svetlobi lahko ustreza opazovalnim potrebam medicinskega osebja in znatno zmanjša porabo energije . Vendar je razpon prilagajanja svetlosti tradicionalnih virov osvetlitve omejen in natančnost prilagoditve ni visoka, kar je težko doseči tako natančno upravljanje energetske učinkovitosti .
Regionalna tehnologija zatemnitve
Regionalno zatemnitev je pomembna tehnologija za izboljšanje energetske učinkovitosti virov osvetlitve LED ., ki razdeli LCD zaslon na več neodvisnih zatemnitvenih območij, LED kroglice na vsakem območju X-rays. By using regional dimming technology, the brightness of LED chips in bright areas is increased, while the brightness of LED chips in dark areas is reduced or even turned off, greatly reducing overall energy consumption while ensuring image quality. In contrast, traditional backlight sources are unable to achieve area dimming, resulting in a uniform distribution of brightness across the entire screen. To vodi do velike količine porabe energije na območjih, ki pri prikazu temnih slik ne potrebujejo osvetlitve .
Hiter odziv in pripravljenost z nizko močjo
In medical settings, the rapid response capability of equipment is crucial. LED backlight has an extremely fast response speed, which can instantly reach the set brightness and reduce the ineffective energy consumption caused by startup delay. In addition, medical LCD screens also require a certain amount of energy consumption when in standby mode. LED backlight sources can reduce standby power consumption to extremely low levels by Zmanjšanje toka ali izklop nekaj lahkih kroglic med pripravljenostjo, medtem ko morajo tradicionalni viri osvetlitve še vedno vzdrževati določen tok, da se cev za svetilko predhodno ogreje
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