Pehea e hiki ai ke hoʻoponopono i ka flicker LED?

No ka mea, pono mākou e ʻike i nā ʻāpana o ka ʻōnaehana kukui e pono e hoʻomaikaʻi ʻia a hoʻololi ʻia paha, ua hoʻokūpaʻa mākou i ke koʻikoʻi o ka ʻike ʻana i ke kumu o ka flicker (he mana AC a i ʻole PWM?).

Inā ʻo kaKaha LEDʻo ia ke kumu o ka flicker, pono ʻoe e hoʻololi iā ia no kahi mea hou i hana ʻia e hoʻomaʻamaʻa i ka mana AC a hoʻololi iā ia i loko o kahi au DC paʻa maoli, a laila hoʻohana ʻia e hoʻokele i nā LED. E ʻimi no "ʻaʻohe ʻālohilohi"nā palapala hōʻoia a me nā ana flicker i ke koho ʻana i kahi kaha LED ma ke ʻano kūikawā:

ʻO ka ʻokoʻa like ʻole ma waena o nā pae ʻōlinolino kiʻekiʻe a me ka liʻiliʻi loa (amplitude) i loko o kahi pōʻaiapuni flicker ua hōʻike ʻia ma ke ʻano he helu pakeneka i kapa ʻia ʻo "flicker percent." ʻO ka maʻamau, ʻōlinolino kahi kukui incandescent ma waena o 10% a me 20%. (no ka mea, mālama kona filament i kekahi o kona wela i ka wā o nā "awāwa" i loko o kahi hōʻailona AC).

ʻO ka Flicker Index kahi ana e ana i ka nui a me ka lōʻihi o ka manawa e hoʻopuka ai kahi LED i ka mālamalama ma mua o ka maʻamau i ka wā o kahi pōʻaiapuni flicker. ʻO ka flicker index o kahi kukui incandescent he 0.04.

ʻO ka wikiwiki o ka hana hou ʻana o kahi pōʻaiapuni flicker i kēlā me kēia kekona ua ʻike ʻia ʻo ia ka alapine flicker a ua hōʻike ʻia ma hertz (Hz). Ma muli o ke alapine o ka hōʻailona AC e hiki mai ana, e hana ka hapa nui o nā kukui LED ma 100-120 Hz. ʻO nā pae flicker like a me ka flicker index e emi iki ka hopena ma nā kukui me nā alapine kiʻekiʻe ma muli o ko lākou mau wā hoʻololi wikiwiki.

Ma 100–120 Hz, ʻālohilohi ka hapa nui o nā kukui LED. Paipai ʻo IEEE 1789 i ka 8% palekana ("pilikia haʻahaʻa") e ʻālohilohi ma kēia alapine (frequency), a me 3% e hoʻopau loa i nā hopena o ka ʻālohilohi.

Pono nō hoʻi ʻoe e hoʻololi i ka ʻāpana dimmer PWM inā ʻo ka dimmer PWM a i ʻole ka mea hoʻokele ke kumu o ka flicker. ʻO ka nūhou maikaʻi, ʻoiai ʻaʻole paha nā kaha LED a i ʻole nā ​​​​ʻāpana ʻē aʻe ke kumu o ka flicker, ʻo ka dimmer PWM a i ʻole ka mea hoʻokele wale nō ka mea e pono ai ke hoʻololi.

I ka wā e ʻimi ai i kahi hopena PWM ʻaʻohe flicker, e hōʻoia i loaʻa kahi helu alapine (frequency) maopopo no ka mea ʻo ia wale nō ke anakahi PWM flicker pono (no ka mea, he hōʻailona mau ia me ka 100% flicker). Manaʻo mākou i kahi alapine PWM o 25 kHz (25,000 Hz) a ʻoi aku paha no kahi hopena PWM i ʻole flicker maoli.

ʻOiaʻiʻo, hōʻike nā kūlana e like me IEEE 1789 he kiʻekiʻe ke alapine o nā kumu kukui PWM me ka alapine o 3000 Hz e hōʻemi piha i nā hopena o ka flicker. Eia nō naʻe, ʻo kekahi pōmaikaʻi o ka hoʻokiʻekiʻe ʻana i ke alapine ma luna o 20 kHz, ʻo ia ka hoʻopau ʻana i ka hiki i nā mea hoʻolako mana ke hana i nā leo buzzing a uwē paha i ʻike ʻia. ʻO ke kumu o kēia, ʻo ka alapine hiki ke lohe ʻia no ka hapa nui o ka poʻe he 20,000 Hz, no laila ma ka wehewehe ʻana i kahi mea ma 25,000 Hz, no ka laʻana, hiki iā ʻoe ke pale aku i ka hiki ke hoʻonāukiuki i nā leo buzzing a uwē paha, hiki ke pilikia inā ʻoe he naʻau koʻikoʻi a inā he naʻau koʻikoʻi loa kāu noi.