{"id":12797,"date":"2023-08-30T06:17:30","date_gmt":"2023-08-30T06:17:30","guid":{"rendered":"https:\/\/www2.iled-lights.com\/?p=12797"},"modified":"2023-08-30T09:58:03","modified_gmt":"2023-08-30T09:58:03","slug":"contrast-to-explain-two-dimming-ways-of-white-led","status":"publish","type":"post","link":"https:\/\/www.iled-lights.com\/vi\/contrast-to-explain-two-dimming-ways-of-white-led-a67.html","title":{"rendered":"So S\u00e1nh \u0110\u1ec3 Gi\u1ea3i Th\u00edch Hai C\u00e1ch Ch\u1ec9nh S\u1edd LED Tr\u1eafng"},"content":{"rendered":"

LED tr\u1eafng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u1ec9nh s\u00e1ng b\u1eb1ng hai ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh: ch\u1ec9nh s\u00e1ng t\u01b0\u01a1ng t\u1ef1 (analog) v\u00e0 \u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung (PWM).<\/p>\n

1. Ch\u1eadp m\u1edd t\u01b0\u01a1ng t\u1ef1: <\/strong> Ch\u1eadp m\u1edd t\u01b0\u01a1ng t\u1ef1 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1ee7a \u0111\u00e8n LED b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n li\u00ean t\u1ee5c ch\u1ea3y qua \u0111\u00e8n. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y bao g\u1ed3m vi\u1ec7c gi\u1ea3m d\u00f2ng \u0111i\u1ec7n \u0111\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 s\u00e1ng ho\u1eb7c t\u0103ng d\u00f2ng \u0111i\u1ec7n \u0111\u1ec3 t\u0103ng \u0111\u1ed9 s\u00e1ng. Ch\u1eadp m\u1edd t\u01b0\u01a1ng t\u1ef1 ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p tr\u00ean \u0111\u00e8n LED ho\u1eb7c s\u1eed d\u1ee5ng m\u1ed9t \u0111i\u1ec7n tr\u1edf gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n m\u1eafc n\u1ed1i ti\u1ebfp v\u1edbi \u0111\u00e8n LED. B\u1eb1ng c\u00e1ch thay \u0111\u1ed5i m\u1ee9c \u0111i\u1ec7n tr\u1edf ho\u1eb7c \u0111i\u1ec7n \u00e1p, d\u00f2ng \u0111i\u1ec7n ch\u1ea3y qua \u0111\u00e8n LED \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh, d\u1eabn \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i t\u01b0\u01a1ng \u1ee9ng v\u1ec1 \u0111\u1ed9 s\u00e1ng. Ch\u1eadp m\u1edd t\u01b0\u01a1ng t\u1ef1 cung c\u1ea5p hi\u1ec7u \u1ee9ng m\u1edd s\u00e1ng v\u00e0 m\u1edd t\u1ed1i m\u01b0\u1ee3t m\u00e0, li\u00ean t\u1ee5c m\u00e0 kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c. <\/p>\n

\"\u0110\u00e8n<\/p>\n

2. Ch\u1eadp m\u1edd b\u1eb1ng \u0111i\u1ec1u bi\u1ebfn chu k\u1ef3 ho\u1ea1t \u0111\u1ed9ng (PWM): <\/strong> Ch\u1eadp m\u1edd PWM l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt ch\u1eadp m\u1edd k\u1ef9 thu\u1eadt s\u1ed1, b\u1eadt v\u00e0 t\u1eaft \u0111\u00e8n LED nhanh ch\u00f3ng \u1edf t\u1ea7n s\u1ed1 cao. M\u1ee9c \u0111\u1ed9 s\u00e1ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh t\u1ef7 l\u1ec7 th\u1eddi gian b\u1eadt (chu k\u1ef3 ho\u1ea1t \u0111\u1ed9ng) so v\u1edbi th\u1eddi gian t\u1eaft. V\u00ed d\u1ee5, chu k\u1ef3 ho\u1ea1t \u0111\u1ed9ng cao h\u01a1n (th\u1eddi gian b\u1eadt nhi\u1ec1u h\u01a1n) s\u1ebd cho ra \u00e1nh s\u00e1ng s\u00e1ng h\u01a1n, trong khi chu k\u1ef3 ho\u1ea1t \u0111\u1ed9ng th\u1ea5p h\u01a1n (th\u1eddi gian t\u1eaft nhi\u1ec1u h\u01a1n) s\u1ebd cho ra \u00e1nh s\u00e1ng m\u1edd h\u01a1n. T\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch th\u01b0\u1eddng r\u1ea5t cao, th\u01b0\u1eddng n\u1eb1m trong ph\u1ea1m vi kilohertz ho\u1eb7c megahertz, khi\u1ebfn cho s\u1ef1 chuy\u1ec3n \u0111\u1ed5i b\u1eadt-t\u1eaft kh\u00f4ng th\u1ec3 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c b\u1eb1ng m\u1eaft ng\u01b0\u1eddi. Ch\u1eadp m\u1edd PWM th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng LED v\u00ec hi\u1ec7u qu\u1ea3 cao v\u00e0 cho ph\u00e9p ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c m\u1ee9c \u0111\u1ed9 s\u00e1ng. Tuy nhi\u00ean, m\u1ed9t s\u1ed1 ng\u01b0\u1eddi c\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y \u1edf m\u1ee9c ch\u1eadp m\u1edd th\u1ea5p ho\u1eb7c n\u1ebfu t\u1ea7n s\u1ed1 PWM qu\u00e1 th\u1ea5p. <\/p>\n

\"\u0110\u00e8n<\/p>","protected":false},"excerpt":{"rendered":"

White LEDs can be dimmed using two main methods: analog dimming and pulse-width modulation (PWM) dimming. 1. Analog Dimming: Analog dimming adjusts the brightness of the LED by varying the continuous current flowing through it. This method involves reducing the current to lower the brightness or increasing it to raise the brightness. Analog dimming works […]<\/p>\n","protected":false},"author":6,"featured_media":12798,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-12797","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-and-blog"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/posts\/12797","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/comments?post=12797"}],"version-history":[{"count":2,"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/posts\/12797\/revisions"}],"predecessor-version":[{"id":12802,"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/posts\/12797\/revisions\/12802"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/media\/12798"}],"wp:attachment":[{"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/media?parent=12797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/categories?post=12797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iled-lights.com\/vi\/wp-json\/wp\/v2\/tags?post=12797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}