{"id":12671,"date":"2024-06-06T17:22:19","date_gmt":"2024-06-06T09:22:19","guid":{"rendered":"https:\/\/boqiled.com\/?p=12671"},"modified":"2025-12-03T17:12:41","modified_gmt":"2025-12-03T09:12:41","slug":"what-is-pwm-dimming-for-led-driver","status":"publish","type":"post","link":"https:\/\/boqiled.com\/vi\/what-is-pwm-dimming-for-led-driver\/","title":{"rendered":"PWM Dimming Cho B\u1ed9 \u0110i\u1ec1u Khi\u1ec3n LED L\u00e0 G\u00ec?"},"content":{"rendered":"<p><strong>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng b\u1eb1ng \u0110i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung (PWM) l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m so\u00e1t \u0111\u1ed9 s\u00e1ng c\u1ee7a \u0111\u00e8n LED. K\u1ef9 thu\u1eadt n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1edd hi\u1ec7u su\u1ea5t cao v\u00e0 kh\u1ea3 n\u0103ng cung c\u1ea5p kh\u1ea3 n\u0103ng \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng ch\u00ednh x\u00e1c. B\u00e0i vi\u1ebft n\u00e0y kh\u00e1m ph\u00e1 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM, nh\u1eefng \u01b0u \u0111i\u1ec3m c\u1ee7a n\u00f3, chi ti\u1ebft k\u1ef9 thu\u1eadt v\u00e0 c\u00e1ch so s\u00e1nh v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng kh\u00e1c.<\/strong><\/p>\n\n\n\n<p><strong>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM cho b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED s\u1eed d\u1ee5ng \u0110i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung. N\u00f3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1ee7a \u0111\u00e8n LED b\u1eb1ng c\u00e1ch b\u1eadt v\u00e0 t\u1eaft ch\u00fang \u1edf t\u1ea7n s\u1ed1 cao. B\u1eb1ng c\u00e1ch thay \u0111\u1ed5i chu k\u1ef3 nhi\u1ec7m v\u1ee5, c\u00f4ng su\u1ea5t trung b\u00ecnh cung c\u1ea5p cho \u0111\u00e8n LED thay \u0111\u1ed5i, t\u1eeb \u0111\u00f3 ki\u1ec3m so\u00e1t \u0111\u1ed9 s\u00e1ng. \u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng nh\u1edd hi\u1ec7u su\u1ea5t cao. N\u00f3 cung c\u1ea5p kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c \u0111\u1ed9 s\u00e1ng c\u1ee7a \u0111\u00e8n LED. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng chi\u1ebfu s\u00e1ng.<\/strong><\/p>\n\n\n\n<p>\u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM, ch\u00fang ta c\u1ea7n \u0111i s\u00e2u v\u00e0o chi ti\u1ebft v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 v\u00e0 l\u00fd do t\u1ea1i sao n\u00f3 \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng h\u01a1n c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"353\" height=\"200\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/LED-Strips-Dimming.gif\" alt=\"l\u00e0m m\u1edd \u0111\u00e8n LED d\u00e2y\" class=\"wp-image-10045\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Gi\u1ea3m d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CCR)<\/h3>\n\n\n\n<p>\u0110\u00e8n LED c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau. Ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 Gi\u1ea3m d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CCR) v\u00e0 \u0110i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung (PWM). CCR gi\u1ea3m d\u00f2ng \u0111i\u1ec7n cung c\u1ea5p cho \u0111\u00e8n LED, t\u1eeb \u0111\u00f3 l\u00e0m gi\u1ea3m \u0111\u1ed9 s\u00e1ng c\u1ee7a n\u00f3. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01a1n gi\u1ea3n. Tuy nhi\u00ean, n\u00f3 c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i m\u00e0u s\u1eafc v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a \u0111\u00e8n LED. Vi\u1ec7c gi\u1ea3m d\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 khi\u1ebfn CCR l\u00e0m thay \u0111\u1ed5i m\u00e0u s\u1eafc c\u1ee7a \u0111\u00e8n LED ho\u1eb7c l\u00e0m cho \u0111\u00e8n k\u00e9m s\u00e1ng h\u01a1n. Ngo\u00e0i ra, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 th\u1ec3 t\u1ea1o ra nhi\u1ec1u nhi\u1ec7t h\u01a1n. Nhi\u1ec7t n\u00e0y c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd c\u1ee7a c\u00e1c linh ki\u1ec7n LED.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"350\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-4.png\" alt=\"\" class=\"wp-image-12674\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-4.png 800w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-4-300x131.png 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-4-768x336.png 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-4-18x8.png 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Gi\u1ea3m d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i c\u00f3 \u1ee9ng d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c sau.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C\u00e1c t\u00ecnh hu\u1ed1ng m\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u1edf xa ngu\u1ed3n \u0111i\u1ec7n<\/li>\n\n\n\n<li>Khu v\u1ef1c \u1ea9m \u01b0\u1edbt v\u00e0 \u1ee9ng d\u1ee5ng ngo\u00e0i tr\u1eddi<\/li>\n\n\n\n<li>C\u00e1c khu v\u1ef1c c\u00f3 ti\u00eau chu\u1ea9n nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) nghi\u00eam ng\u1eb7t<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung (PWM)<\/h3>\n\n\n\n<p>M\u1eb7t kh\u00e1c, \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM ki\u1ec3m so\u00e1t \u0111\u1ed9 s\u00e1ng b\u1eb1ng c\u00e1ch b\u1eadt v\u00e0 t\u1eaft \u0111\u00e8n LED nhanh ch\u00f3ng. C\u00f4ng su\u1ea5t trung b\u00ecnh cung c\u1ea5p cho \u0111\u00e8n LED \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i chu k\u1ef3 nhi\u1ec7m v\u1ee5 c\u1ee7a t\u00edn hi\u1ec7u PWM. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n m\u00e0u s\u1eafc v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n, l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean trong nhi\u1ec1u \u1ee9ng d\u1ee5ng. PWM \u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung. N\u00f3 \u0111\u1ea3m b\u1ea3o \u0111\u00e8n LED nh\u1eadn \u0111\u01b0\u1ee3c ngu\u1ed3n \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh trong c\u00e1c \u0111\u1ee3t ng\u1eafn. \u0110i\u1ec1u n\u00e0y gi\u00fap \u0111\u00e8n LED duy tr\u00ec m\u00e0u s\u1eafc c\u1ee7a n\u00f3. Ngo\u00e0i ra, PWM c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi c\u00e1c h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt s\u1ed1. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 t\u01b0\u01a1ng th\u00edch cao v\u1edbi c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n t\u1eed hi\u1ec7n \u0111\u1ea1i v\u00e0 h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng th\u00f4ng minh.<\/p>\n\n\n\n<p>PWM c\u00f3 \u1ee9ng d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c sau.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED<\/li>\n\n\n\n<li>T\u1ea5m pin m\u1eb7t tr\u1eddi<\/li>\n\n\n\n<li>\u0110\u1ed9ng c\u01a1<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">PWM Dimming l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng t\u00edn hi\u1ec7u s\u00f3ng vu\u00f4ng \u0111\u1ec3 ki\u1ec3m so\u00e1t ngu\u1ed3n \u0111i\u1ec7n cung c\u1ea5p cho \u0111\u00e8n LED. T\u00edn hi\u1ec7u chuy\u1ec3n \u0111\u1ed5i gi\u1eefa tr\u1ea1ng th\u00e1i b\u1eadt v\u00e0 t\u1eaft \u1edf t\u1ea7n s\u1ed1 cao. Chu k\u1ef3 nhi\u1ec7m v\u1ee5 l\u00e0 t\u1ef7 l\u1ec7 th\u1eddi gian t\u00edn hi\u1ec7u \u1edf tr\u1ea1ng th\u00e1i b\u1eadt. N\u00f3 x\u00e1c \u0111\u1ecbnh c\u00f4ng su\u1ea5t trung b\u00ecnh v\u00e0 do \u0111\u00f3 l\u00e0 \u0111\u1ed9 s\u00e1ng c\u1ee7a \u0111\u00e8n LED. V\u00ed d\u1ee5: n\u1ebfu chu k\u1ef3 nhi\u1ec7m v\u1ee5 \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf m\u1ee9c 50%, \u0111\u00e8n LED s\u1ebd b\u1eadt trong m\u1ed9t n\u1eeda th\u1eddi gian v\u00e0 t\u1eaft trong n\u1eeda c\u00f2n l\u1ea1i, d\u1eabn \u0111\u1ebfn \u0111\u1ed9 s\u00e1ng 50%. N\u00f3 b\u1eadt v\u00e0 t\u1eaft nhanh ch\u00f3ng. M\u1eaft ng\u01b0\u1eddi nh\u00ecn th\u1ea5y n\u00f3 nh\u01b0 m\u1ed9t hi\u1ec7u \u1ee9ng \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng, kh\u00f4ng ph\u1ea3i \u00e1nh s\u00e1ng nh\u1ea5p nh\u00e1y.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5: chu k\u1ef3 nhi\u1ec7m v\u1ee5 50% c\u00f3 ngh\u0129a l\u00e0 \u0111\u00e8n LED b\u1eadt m\u1ed9t n\u1eeda th\u1eddi gian v\u00e0 t\u1eaft m\u1ed9t n\u1eeda c\u00f2n l\u1ea1i, d\u1eabn \u0111\u1ebfn \u0111\u1ed9 s\u00e1ng 50%. B\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh chu k\u1ef3 nhi\u1ec7m v\u1ee5, c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c \u0111\u1ed9 s\u00e1ng. Ngo\u00e0i ra, \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM kh\u00f4ng b\u1ecb gi\u1edbi h\u1ea1n \u1edf c\u00e1c m\u1eabu b\u1eadt-t\u1eaft \u0111\u01a1n gi\u1ea3n. Chu k\u1ef3 nhi\u1ec7m v\u1ee5 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thay \u0111\u1ed5i m\u1ed9t c\u00e1ch m\u01b0\u1ee3t m\u00e0. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p thay \u0111\u1ed5i \u0111\u1ed9 s\u00e1ng d\u1ea7n d\u1ea7n. \u0110i\u1ec1u n\u00e0y h\u1eefu \u00edch cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng m\u01b0\u1ee3t m\u00e0. Ch\u00fang bao g\u1ed3m chi\u1ebfu s\u00e1ng ki\u1ebfn tr\u00fac ho\u1eb7c s\u00e2n kh\u1ea5u. Ngo\u00e0i ra, b\u1ed9 vi \u0111i\u1ec1u khi\u1ec3n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 linh ho\u1ea1t cho nhi\u1ec1u thi\u1ebft k\u1ebf b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED kh\u00e1c nhau.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"336\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-Power-Supply.jpg\" alt=\"\" class=\"wp-image-9441\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-Power-Supply.jpg 800w, https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-Power-Supply-300x126.jpg 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-Power-Supply-768x323.jpg 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-Power-Supply-18x8.jpg 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i sao PWM \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng \u0111\u00e8n LED<\/h2>\n\n\n\n<p>PWM \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng \u0111\u00e8n LED v\u00ec n\u00f3 mang l\u1ea1i m\u1ed9t s\u1ed1 l\u1ee3i th\u1ebf:<\/p>\n\n\n\n<p>\u2013 <strong>Hi\u1ec7u qu\u1ea3<\/strong>: \u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM kh\u00f4ng ti\u00eau t\u00e1n n\u0103ng l\u01b0\u1ee3ng d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t, l\u00e0m cho n\u00f3 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng h\u01a1n. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng t\u01b0\u01a1ng t\u1ef1 c\u00f3 th\u1ec3 l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng b\u1eb1ng c\u00e1ch bi\u1ebfn n\u0103ng l\u01b0\u1ee3ng d\u01b0 th\u1eeba th\u00e0nh nhi\u1ec7t. PWM ki\u1ec3m so\u00e1t ngu\u1ed3n \u0111i\u1ec7n ch\u00ednh x\u00e1c h\u01a1n. N\u00f3 \u0111\u1ea3m b\u1ea3o t\u1ed5n th\u1ea5t n\u0103ng l\u01b0\u1ee3ng t\u1ed1i thi\u1ec3u. T\u1ed1c \u0111\u1ed9 n\u00e0y l\u00e0 ch\u00eca kh\u00f3a trong c\u00e1c lo\u1ea1i \u0111\u00e8n s\u1eed d\u1ee5ng pin ho\u1eb7c \u0111\u00e8n di \u0111\u1ed9ng. Ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng l\u00e0 r\u1ea5t quan tr\u1ecdng \u1edf \u0111\u00f3.<\/p>\n\n\n\n<p>\u2013 <strong>\u0110\u1ed9 ch\u00ednh x\u00e1c<\/strong>: N\u00f3 cung c\u1ea5p kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c c\u00e1c m\u1ee9c \u0111\u1ed9 s\u00e1ng. Kh\u1ea3 n\u0103ng \u0111i\u1ec1u ch\u1ec9nh chu k\u1ef3 nhi\u1ec7m v\u1ee5 m\u1ed9t c\u00e1ch tinh vi cho ph\u00e9p c\u00f3 nhi\u1ec1u c\u00e0i \u0111\u1eb7t \u0111\u1ed9 s\u00e1ng, t\u1eeb r\u1ea5t m\u1edd \u0111\u1ebfn \u0111\u1ed9 s\u00e1ng t\u1ed1i \u0111a. \u0110\u1ed9 ch\u00ednh x\u00e1c n\u00e0y l\u00e0m cho \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 vi\u1ec7c ki\u1ec3m so\u00e1t \u00e1nh s\u00e1ng ch\u00ednh x\u00e1c l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft, ch\u1eb3ng h\u1ea1n nh\u01b0 trong thi\u1ebft b\u1ecb y t\u1ebf, \u0111\u00e8n chi\u1ebfu s\u00e1ng nhi\u1ebfp \u1ea3nh v\u00e0 \u0111\u00e8n n\u1ec1n m\u00e0n h\u00ecnh hi\u1ec3n th\u1ecb.<\/p>\n\n\n\n<p>\u2013 <strong>T\u00ednh nh\u1ea5t qu\u00e1n<\/strong>: Duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 m\u00e0u v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng \u00e1nh s\u00e1ng LED. V\u00ec \u0111\u00e8n LED lu\u00f4n ho\u1ea1t \u0111\u1ed9ng \u1edf d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c \u0111\u1ea7y \u0111\u1ee7 trong c\u00e1c kho\u1ea3ng th\u1eddi gian \u201cb\u1eadt\u201d, nhi\u1ec7t \u0111\u1ed9 m\u00e0u v\u1eabn \u1ed5n \u0111\u1ecbnh. \u0110\u00e2y l\u00e0 m\u1ed9t l\u1ee3i th\u1ebf \u0111\u00e1ng k\u1ec3 so v\u1edbi \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng t\u01b0\u01a1ng t\u1ef1, c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 thay \u0111\u1ed5i m\u00e0u s\u1eafc \u1edf m\u1ee9c d\u00f2ng \u0111i\u1ec7n th\u1ea5p h\u01a1n. Ch\u1ea5t l\u01b0\u1ee3ng m\u00e0u s\u1eafc nh\u1ea5t qu\u00e1n l\u00e0 r\u1ea5t quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 chi\u1ebfu s\u00e1ng b\u00e1n l\u1ebb v\u00e0 tr\u01b0ng b\u00e0y b\u1ea3o t\u00e0ng. M\u00e0u s\u1eafc ch\u00ednh x\u00e1c l\u00e0 r\u1ea5t quan tr\u1ecdng \u1edf nh\u1eefng n\u01a1i n\u00e0y.<\/p>\n\n\n\n<p>\u2013 <strong>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch<\/strong>: D\u1ec5 d\u00e0ng t\u00edch h\u1ee3p v\u1edbi c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n k\u1ef9 thu\u1eadt s\u1ed1 v\u00e0 b\u1ed9 vi \u0111i\u1ec1u khi\u1ec3n. Nhi\u1ec1u thi\u1ebft b\u1ecb k\u1ef9 thu\u1eadt s\u1ed1 c\u00f3 th\u1ec3 t\u1ea1o ra t\u00edn hi\u1ec7u PWM. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y bao g\u1ed3m b\u1ed9 vi \u0111i\u1ec1u khi\u1ec3n, PLC v\u00e0 th\u1eadm ch\u00ed m\u1ed9t s\u1ed1 b\u1ed9 h\u1eb9n gi\u1edd \u0111\u01a1n gi\u1ea3n. Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch n\u00e0y cho ph\u00e9p t\u00edch h\u1ee3p d\u1ec5 d\u00e0ng v\u00e0o h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng th\u00f4ng minh v\u00e0 thi\u1ebft l\u1eadp \u0111i\u1ec1u khi\u1ec3n t\u1ef1 \u0111\u1ed9ng, cho ph\u00e9p c\u00e1c t\u00ednh n\u0103ng nh\u01b0 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9 s\u00e1ng t\u1eeb xa, l\u1ecbch tr\u00ecnh chi\u1ebfu s\u00e1ng c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh v\u00e0 hi\u1ec7u \u1ee9ng \u00e1nh s\u00e1ng \u0111\u1ed9ng.<\/p>\n\n\n\n<p>Nh\u1eefng l\u1ee3i \u00edch n\u00e0y l\u00e0m cho PWM tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng. Ch\u00fang bao g\u1ed3m t\u1eeb chi\u1ebfu s\u00e1ng gia \u0111\u00ecnh \u0111\u1ebfn s\u1eed d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 \u00f4 t\u00f4. Trong \u00f4 t\u00f4, v\u00ed d\u1ee5, \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng \u0111\u00e8n pha. N\u00f3 c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong chi\u1ebfu s\u00e1ng xung quanh n\u1ed9i th\u1ea5t. N\u00f3 cung c\u1ea5p kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u qu\u1ea3 trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n thay \u0111\u1ed5i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Chi ti\u1ebft k\u1ef9 thu\u1eadt v\u1ec1 c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM ho\u1ea1t \u0111\u1ed9ng trong b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED<\/h2>\n\n\n\n<p>\u0110i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung (PWM) trong b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED li\u00ean quan \u0111\u1ebfn vi\u1ec7c t\u1ea1o ra t\u00edn hi\u1ec7u s\u00f3ng vu\u00f4ng t\u1ea7n s\u1ed1 cao. T\u00edn hi\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED, sau \u0111\u00f3 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n s\u1ebd \u0111i\u1ec1u ch\u1ec9nh ngu\u1ed3n \u0111i\u1ec7n c\u1ea5p cho LED d\u1ef1a tr\u00ean chu k\u1ef3 nhi\u1ec7m v\u1ee5 c\u1ee7a t\u00edn hi\u1ec7u PWM. B\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t b\u1ed9 trung gian, \u0111\u1ea3m b\u1ea3o LED nh\u1eadn \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng ch\u00ednh x\u00e1c \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 s\u00e1ng mong mu\u1ed1n. Qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ebf li\u00ean quan \u0111\u1ebfn vi\u1ec7c b\u1eadt v\u00e0 t\u1eaft d\u00f2ng \u0111i\u1ec7n c\u1ea5p cho LED \u1edf t\u1ed1c \u0111\u1ed9 cao. Th\u1eddi gian \u201cb\u1eadt\u201d \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi chu k\u1ef3 nhi\u1ec7m v\u1ee5 c\u1ee7a t\u00edn hi\u1ec7u PWM.<\/p>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED th\u01b0\u1eddng bao g\u1ed3m m\u1ed9t b\u1ed9 vi \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c m\u1ed9t IC \u0111i\u1ec1u khi\u1ec3n PWM chuy\u00ean d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra t\u00edn hi\u1ec7u PWM. T\u1ea7n s\u1ed1 c\u1ee7a t\u00edn hi\u1ec7u PWM \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u1ee7 cao \u0111\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y, th\u01b0\u1eddng tr\u00ean 200 Hz. \u1ede t\u1ea7n s\u1ed1 n\u00e0y, c\u00e1c chuy\u1ec3n \u0111\u1ed5i b\u1eadt-t\u1eaft qu\u00e1 nhanh \u0111\u1ec3 m\u1eaft ng\u01b0\u1eddi c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n, t\u1ea1o ra hi\u1ec7u \u1ee9ng l\u00e0m m\u1edd m\u01b0\u1ee3t m\u00e0. B\u1ed9 vi \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c IC \u0111i\u1ec1u khi\u1ec3n PWM \u0111i\u1ec1u ch\u1ec9nh chu k\u1ef3 nhi\u1ec7m v\u1ee5. N\u00f3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u n\u00e0y d\u1ef1a tr\u00ean \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c c\u00e1c c\u00e0i \u0111\u1eb7t \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9 s\u00e1ng LED \u0111\u1ed9ng v\u00e0 linh ho\u1ea1t.<\/p>\n\n\n\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u0111\u00e1ng tin c\u1eady, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED ph\u1ea3i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee5 th\u1ec3 c\u1ee7a t\u1ea3i LED. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m \u0111i\u1ec7n \u00e1p thu\u1eadn c\u1ee7a LED. N\u00f3 c\u0169ng bao g\u1ed3m \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n v\u00e0 nhu c\u1ea7u nhi\u1ec7t. C\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n c\u00f3 th\u1ec3 c\u00f3 ph\u1ea3n h\u1ed3i. N\u00f3 gi\u00e1m s\u00e1t hi\u1ec7u su\u1ea5t c\u1ee7a LED v\u00e0 \u0111i\u1ec1u ch\u1ec9nh t\u00edn hi\u1ec7u PWM. \u0110i\u1ec1u n\u00e0y gi\u1eef cho \u0111\u1ed9 s\u00e1ng v\u00e0 m\u00e0u s\u1eafc nh\u1ea5t qu\u00e1n trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n thay \u0111\u1ed5i. Ngo\u00e0i ra, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED c\u00f3 th\u1ec3 c\u00f3 c\u00e1c t\u00ednh n\u0103ng b\u1ea3o v\u1ec7. Ch\u00fang bao g\u1ed3m b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng, ng\u1eaft nhi\u1ec7t v\u00e0 b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch. Ch\u00fang b\u1ea3o v\u1ec7 c\u1ea3 LED v\u00e0 m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng LED: PWM so v\u1edbi D\u00f2ng \u0111i\u1ec7n\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/zU2Oxyfi2Q4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">PWM nh\u01b0 m\u1ed9t t\u00edn hi\u1ec7u \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng: Chu k\u1ef3 nhi\u1ec7m v\u1ee5 v\u00e0 t\u1ea7n s\u1ed1<\/h2>\n\n\n\n<p>Chu k\u1ef3 nhi\u1ec7m v\u1ee5 c\u1ee7a t\u00edn hi\u1ec7u PWM l\u00e0 t\u1ef7 l\u1ec7 gi\u1eefa th\u1eddi gian b\u1eadt v\u00e0 t\u1ed5ng chu k\u1ef3 c\u1ee7a t\u00edn hi\u1ec7u. V\u00ed d\u1ee5, chu k\u1ef3 nhi\u1ec7m v\u1ee5 25% c\u00f3 ngh\u0129a l\u00e0 t\u00edn hi\u1ec7u b\u1eadt trong 25% th\u1eddi gian v\u00e0 t\u1eaft trong 75%. \u0110i\u1ec1u ch\u1ec9nh chu k\u1ef3 nhi\u1ec7m v\u1ee5 thay \u0111\u1ed5i c\u00f4ng su\u1ea5t trung b\u00ecnh c\u1ea5p cho LED, do \u0111\u00f3 ki\u1ec3m so\u00e1t \u0111\u1ed9 s\u00e1ng c\u1ee7a n\u00f3. T\u00ednh linh ho\u1ea1t c\u1ee7a chu k\u1ef3 nhi\u1ec7m v\u1ee5 cho ph\u00e9p m\u1ed9t lo\u1ea1t c\u00e1c m\u1ee9c \u0111\u1ed9 s\u00e1ng. Ch\u00fang t\u1eeb g\u1ea7n nh\u01b0 t\u1eaft \u0111\u1ebfn b\u1eadt ho\u00e0n to\u00e0n. N\u00f3 cung c\u1ea5p kh\u1ea3 n\u0103ng \u0111i\u1ec1u khi\u1ec3n l\u00e0m m\u1edd ch\u00ednh x\u00e1c v\u00e0 m\u01b0\u1ee3t m\u00e0.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"251\" height=\"46\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/on-time-of-PWM-duty-cycle-signal.jpg\" alt=\"\" class=\"wp-image-9438\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/on-time-of-PWM-duty-cycle-signal.jpg 251w, https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/on-time-of-PWM-duty-cycle-signal-18x3.jpg 18w\" sizes=\"(max-width: 251px) 100vw, 251px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"503\" height=\"174\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-duty-cycle.jpg\" alt=\"\" class=\"wp-image-9439\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-duty-cycle.jpg 503w, https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-duty-cycle-300x104.jpg 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-duty-cycle-18x6.jpg 18w\" sizes=\"(max-width: 503px) 100vw, 503px\" \/><\/figure>\n\n\n\n<p>T\u1ea7n s\u1ed1 c\u1ee7a t\u00edn hi\u1ec7u PWM c\u0169ng r\u1ea5t quan tr\u1ecdng. T\u1ea7n s\u1ed1 cao h\u01a1n l\u00e0m cho vi\u1ec7c l\u00e0m m\u1edd m\u01b0\u1ee3t m\u00e0 h\u01a1n v\u00e0 tr\u00e1nh nh\u1ea5p nh\u00e1y. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t \u0111\u00fang trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 chuy\u1ec3n \u0111\u1ed9ng, nh\u01b0 quay video. T\u1ea7n s\u1ed1 tr\u00ean 25 kHz \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1ec3 l\u00e0m m\u1edd kh\u00f4ng nh\u1ea5p nh\u00e1y. \u1ede c\u00e1c t\u1ea7n s\u1ed1 cao n\u00e0y, t\u00edn hi\u1ec7u PWM b\u1eadt v\u00e0 t\u1eaft r\u1ea5t nhanh. S\u1ef1 nh\u1ea5p nh\u00e1y n\u00e0y qu\u00e1 nhanh \u0111\u1ebfn m\u1ee9c con ng\u01b0\u1eddi v\u00e0 m\u00e1y quay t\u1ed1c \u0111\u1ed9 cao kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng trong c\u00e1c thi\u1ebft l\u1eadp chi\u1ebfu s\u00e1ng chuy\u00ean nghi\u1ec7p. Nh\u1ea5p nh\u00e1y c\u00f3 th\u1ec3 g\u00e2y h\u1ea1i cho ch\u1ea5t l\u01b0\u1ee3ng video v\u00e0 s\u1ef1 tho\u1ea3i m\u00e1i c\u1ee7a ng\u01b0\u1eddi xem.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"219\" height=\"73\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-frequency.jpg\" alt=\"\" class=\"wp-image-9440\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-frequency.jpg 219w, https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-frequency-18x6.jpg 18w\" sizes=\"(max-width: 219px) 100vw, 219px\" \/><\/figure>\n\n\n\n<p>Trong th\u1ef1c t\u1ebf, vi\u1ec7c l\u1ef1a ch\u1ecdn t\u1ea7n s\u1ed1 PWM ph\u1ee5 thu\u1ed9c v\u00e0o nhu c\u1ea7u c\u1ee7a LED v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee7a n\u00f3. V\u00ed d\u1ee5, trong chi\u1ebfu s\u00e1ng ki\u1ebfn tr\u00fac, t\u1ea7n s\u1ed1 kho\u1ea3ng 1 kHz c\u00f3 th\u1ec3 \u0111\u1ee7 \u0111\u1ec3 tr\u00e1nh nh\u1ea5p nh\u00e1y c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y. Nh\u01b0ng, trong chi\u1ebfu s\u00e1ng video hi\u1ec7u su\u1ea5t cao, t\u1ea7n s\u1ed1 25 kHz ho\u1eb7c cao h\u01a1n c\u00f3 th\u1ec3 c\u1ea7n thi\u1ebft \u0111\u1ec3 c\u00f3 hi\u1ec7u su\u1ea5t ho\u00e0n h\u1ea3o. Chu k\u1ef3 nhi\u1ec7m v\u1ee5 v\u00e0 t\u1ea7n s\u1ed1 ph\u1ea3i \u0111\u01b0\u1ee3c hi\u1ec7u ch\u1ec9nh c\u1ea9n th\u1eadn. Ch\u00fang c\u00e2n b\u1eb1ng \u0111\u1ed9 s\u00e1ng, hi\u1ec7u qu\u1ea3 v\u00e0 ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng nh\u1ea5p nh\u00e1y. C\u00e1c y\u1ebfu t\u1ed1 bao g\u1ed3m th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a LED v\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PWM nh\u01b0 \u0110\u1ea7u ra c\u1ee7a B\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED<\/h2>\n\n\n\n<p>Trong b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED d\u1ef1a tr\u00ean PWM, \u0111\u1ea7u ra l\u00e0 d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u00edn hi\u1ec7u PWM. B\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u PWM th\u00e0nh d\u00f2ng \u0111i\u1ec7n t\u01b0\u01a1ng \u1ee9ng, sau \u0111\u00f3 d\u00f2ng \u0111i\u1ec7n n\u00e0y \u0111i\u1ec1u khi\u1ec3n LED. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1ea3m b\u1ea3o LED nh\u1eadn \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n ch\u00ednh x\u00e1c. \u0110i\u1ec1u n\u00e0y gi\u1eef cho \u0111\u1ed9 s\u00e1ng v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a n\u00f3. \u0110i\u1ec1u ch\u1ebf d\u00f2ng \u0111i\u1ec7n cho ph\u00e9p ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c \u0111\u1ea7u ra \u00e1nh s\u00e1ng c\u1ee7a LED. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t nh\u1ea5t qu\u00e1n tr\u00ean m\u1ed9t lo\u1ea1t c\u00e1c m\u1ee9c \u0111\u1ed9 s\u00e1ng.<\/p>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch nhanh ch\u00f3ng b\u1eadt v\u00e0 t\u1eaft d\u00f2ng \u0111i\u1ec7n c\u1ea5p cho LED \u0111\u1ed3ng b\u1ed9 v\u1edbi t\u00edn hi\u1ec7u PWM. Trong c\u00e1c kho\u1ea3ng th\u1eddi gian \u201cb\u1eadt\u201d, LED nh\u1eadn d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7y \u0111\u1ee7, t\u1ea1o ra \u0111\u1ea7u ra \u00e1nh s\u00e1ng t\u1ed1i \u0111a. Trong c\u00e1c kho\u1ea3ng th\u1eddi gian \u201ct\u1eaft\u201d, LED kh\u00f4ng nh\u1eadn d\u00f2ng \u0111i\u1ec7n, d\u1eabn \u0111\u1ebfn kh\u00f4ng c\u00f3 \u0111\u1ea7u ra \u00e1nh s\u00e1ng. B\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec1u ch\u1ec9nh t\u1ef7 l\u1ec7 gi\u1eefa c\u00e1c kho\u1ea3ng th\u1eddi gian \u201cb\u1eadt\u201d v\u00e0 \u201ct\u1eaft\u201d (chu k\u1ef3 nhi\u1ec7m v\u1ee5). S\u1ef1 \u0111i\u1ec1u khi\u1ec3n n\u00e0y \u0111\u1eb7t d\u00f2ng \u0111i\u1ec7n trung b\u00ecnh v\u00e0 do \u0111\u00f3, \u0111\u1ea7u ra \u00e1nh s\u00e1ng trung b\u00ecnh c\u1ee7a LED.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"787\" height=\"516\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-signal-PWM-output-and-CCR-output.jpg\" alt=\"\" class=\"wp-image-9442\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-signal-PWM-output-and-CCR-output.jpg 787w, https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-signal-PWM-output-and-CCR-output-300x197.jpg 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-signal-PWM-output-and-CCR-output-768x504.jpg 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2023\/07\/PWM-signal-PWM-output-and-CCR-output-18x12.jpg 18w\" sizes=\"(max-width: 787px) 100vw, 787px\" \/><\/figure>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 m\u1ed9t s\u1ed1 \u01b0u \u0111i\u1ec3m. Th\u1ee9 nh\u1ea5t, n\u00f3 cho ph\u00e9p LED ho\u1ea1t \u0111\u1ed9ng \u1edf hi\u1ec7u su\u1ea5t t\u1ed1i \u0111a trong c\u00e1c kho\u1ea3ng th\u1eddi gian \u201cb\u1eadt\u201d, gi\u1ea3m thi\u1ec3u t\u1ed5n th\u1ea5t n\u0103ng l\u01b0\u1ee3ng v\u00e0 sinh nhi\u1ec7t. Th\u1ee9 hai, n\u00f3 duy tr\u00ec s\u1ef1 nh\u1ea5t qu\u00e1n m\u00e0u s\u1eafc c\u1ee7a LED, v\u00ec LED lu\u00f4n ho\u1ea1t \u0111\u1ed9ng \u1edf d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c trong c\u00e1c kho\u1ea3ng th\u1eddi gian \u201cb\u1eadt\u201d. Th\u1ee9 ba, n\u00f3 cung c\u1ea5p ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c \u0111\u1ed9 s\u00e1ng c\u1ee7a LED. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p l\u00e0m m\u1edd m\u01b0\u1ee3t m\u00e0 v\u00e0 c\u00e1c hi\u1ec7u \u1ee9ng \u00e1nh s\u00e1ng \u0111\u1ed9ng. Ngo\u00e0i ra, c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n d\u1ef1a tr\u00ean PWM c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng k\u1ebft n\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n k\u1ef9 thu\u1eadt s\u1ed1. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p \u0111i\u1ec1u khi\u1ec3n c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh v\u00e0 \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa cho thi\u1ebft l\u1eadp chi\u1ebfu s\u00e1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">So s\u00e1nh \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng kh\u00e1c<\/h2>\n\n\n\n<p>PWM l\u00e0m m\u1edd c\u00f3 m\u1ed9t s\u1ed1 \u01b0u \u0111i\u1ec3m so v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c:<\/p>\n\n\n\n<p>\u2013 <strong>L\u00e0m m\u1edd t\u01b0\u01a1ng t\u1ef1 (Analog Dimming)<\/strong>: Li\u00ean quan \u0111\u1ebfn vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh d\u00f2ng \u0111i\u1ec7n c\u1ea5p cho LED. M\u1eb7c d\u00f9 \u0111\u01a1n gi\u1ea3n, nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i m\u00e0u s\u1eafc v\u00e0 k\u00e9m hi\u1ec7u qu\u1ea3 h\u01a1n. L\u00e0m m\u1edd t\u01b0\u01a1ng t\u1ef1 gi\u1ea3m d\u00f2ng \u0111i\u1ec7n d\u1ea7n d\u1ea7n. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 khi\u1ebfn LED ph\u00e1t ra \u00e1nh s\u00e1ng \u1edf c\u00e1c c\u01b0\u1eddng \u0111\u1ed9 kh\u00e1c nhau v\u00e0 c\u00f3 th\u1ec3 thay \u0111\u1ed5i m\u00e0u s\u1eafc c\u1ee7a n\u00f3. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u0169ng c\u00f3 xu h\u01b0\u1edbng ti\u00eau t\u00e1n nhi\u1ec1u \u0111i\u1ec7n n\u0103ng h\u01a1n d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t, l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 t\u1ed5ng th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<p>\u2013 <strong>L\u00e0m m\u1edd c\u1eaft pha (Phase-Cut Dimming)<\/strong>: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED ch\u1ea1y b\u1eb1ng AC, n\u00f3 c\u1eaft s\u00f3ng AC \u0111\u1ec3 gi\u1ea3m c\u00f4ng su\u1ea5t. N\u00f3 c\u00f3 th\u1ec3 g\u00e2y ra nh\u1ea5p nh\u00e1y v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch v\u1edbi m\u1ed9t s\u1ed1 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED. L\u00e0m m\u1edd c\u1eaft pha ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch c\u1eaft m\u1ed9t ph\u1ea7n c\u1ee7a s\u00f3ng AC, l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 c\u00f4ng su\u1ea5t trung b\u00ecnh c\u1ea5p cho LED. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch v\u1edbi m\u1ed9t s\u1ed1 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn nh\u1ea5p nh\u00e1y v\u00e0 hi\u1ec7u su\u1ea5t k\u00e9m. N\u00f3 c\u0169ng y\u00eau c\u1ea7u m\u1ea1ch \u0111i\u1ec7n ph\u1ee9c t\u1ea1p h\u01a1n \u0111\u1ec3 tri\u1ec3n khai, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m t\u0103ng chi ph\u00ed v\u00e0 \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng.<\/p>\n\n\n\n<p>PWM l\u00e0m m\u1edd hi\u1ec7u qu\u1ea3 h\u01a1n. N\u00f3 c\u0169ng cung c\u1ea5p ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c v\u00e0 gi\u1eef cho m\u00e0u s\u1eafc nh\u1ea5t qu\u00e1n. N\u00f3 t\u1ed1t h\u01a1n trong nhi\u1ec1u \u1ee9ng d\u1ee5ng. PWM l\u00e0m m\u1edd \u0111i\u1ec1u ch\u1ebf c\u00f4ng su\u1ea5t b\u1eb1ng t\u00edn hi\u1ec7u t\u1ea7n s\u1ed1 cao. N\u00f3 tr\u00e1nh \u0111\u01b0\u1ee3c c\u00e1c v\u1ea5n \u0111\u1ec1 c\u1ee7a l\u00e0m m\u1edd t\u01b0\u01a1ng t\u1ef1 v\u00e0 c\u1eaft pha. PWM l\u00e0m m\u1edd l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p \u0111\u00e1ng tin c\u1eady v\u00e0 linh ho\u1ea1t h\u01a1n. Ngo\u00e0i ra, PWM l\u00e0m m\u1edd ho\u1ea1t \u0111\u1ed9ng v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n k\u1ef9 thu\u1eadt s\u1ed1. N\u00f3 cho ph\u00e9p c\u00e1c t\u00ednh n\u0103ng n\u00e2ng cao nh\u01b0 h\u1ed3 s\u01a1 l\u00e0m m\u1edd c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh, \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa v\u00e0 t\u00edch h\u1ee3p v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng nh\u00e0 th\u00f4ng minh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hi\u1ec7n th\u1ef1c h\u00f3a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM tr\u00ean th\u1ecb tr\u01b0\u1eddng<\/h2>\n\n\n\n<p>Tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n PWM dimming ng\u00e0y c\u00e0ng quan tr\u1ecdng trong chi\u1ebfu s\u00e1ng LED. Tuy nhi\u00ean, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u r\u1eb1ng c\u00f3 hai ph\u01b0\u01a1ng ph\u00e1p ri\u00eang bi\u1ec7t \u0111\u1ec3 tri\u1ec3n khai tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n PWM dimming. H\u00e3y c\u00f9ng kh\u00e1m ph\u00e1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e0y.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM gi\u1ea3<\/h3>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM gi\u1ea3 l\u1eadp li\u00ean quan \u0111\u1ebfn vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u PWM th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n analog. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1eed d\u1ee5ng b\u1ed9 l\u1ecdc \u0111i\u1ec7n tr\u1edf-t\u1ee5 \u0111i\u1ec7n (RC) b\u00ean trong b\u1ed9 \u0111i\u1ec1u khi\u1ec3n. B\u1ed9 l\u1ecdc RC l\u00e0m m\u01b0\u1ee3t t\u00edn hi\u1ec7u PWM th\u00e0nh \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u (DC) t\u1ef7 l\u1ec7 v\u1edbi chu k\u1ef3 nhi\u1ec7m v\u1ee5. M\u1ed9t \u01b0u \u0111i\u1ec3m c\u1ee7a \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM gi\u1ea3 l\u1eadp l\u00e0 kh\u00f4ng c\u00f3 nhi\u1ec5u v\u00ec d\u00f2ng \u0111i\u1ec7n LED v\u1eabn li\u00ean t\u1ee5c \u1edf \u0111\u1ea7u ra.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"284\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-5.png\" alt=\"\" class=\"wp-image-12675\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-5.png 900w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-5-300x95.png 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-5-768x242.png 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-5-18x6.png 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><figcaption class=\"wp-element-caption\">M\u00f4 t\u1ea3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM t\u1eeb b\u1ea3ng d\u1eef li\u1ec7u s\u1ea3n ph\u1ea9m d\u00f2ng HLG c\u1ee7a Meanwell<\/figcaption><\/figure>\n\n\n\n<p>Tuy nhi\u00ean, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m \u0111\u00e1ng k\u1ec3. Gi\u00e1 tr\u1ecb \u0111\u1ec9nh c\u1ee7a t\u00edn hi\u1ec7u PWM ph\u1ea3i l\u00e0 10V \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t h\u1ea1n ch\u1ebf. Ngo\u00e0i ra, c\u00e1c th\u00f4ng s\u1ed1 RC gi\u1edbi h\u1ea1n t\u1ea7n s\u1ed1 c\u1ee7a t\u00edn hi\u1ec7u PWM. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m t\u00ednh linh ho\u1ea1t v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM th\u1ef1c<\/h3>\n\n\n\n<p>Trong \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM th\u1ef1c t\u1ebf, d\u00f2ng \u0111i\u1ec7n LED \u0111\u01b0\u1ee3c b\u1eadt v\u00e0 t\u1eaft \u1edf t\u1ea7n s\u1ed1 v\u00e0 chu k\u1ef3 nhi\u1ec7m v\u1ee5 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh. M\u1ed9t b\u1ed9 vi \u0111i\u1ec1u khi\u1ec3n (MCU) b\u00ean trong b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ph\u00e1t hi\u1ec7n \u0111i\u1ec7n \u00e1p \u0111\u1ec9nh c\u1ee7a t\u00edn hi\u1ec7u PWM, cho ph\u00e9p \u0111i\u1ec1u khi\u1ec3n ch\u00ednh x\u00e1c. \u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM th\u1ef1c t\u1ebf h\u1ed7 tr\u1ee3 ph\u1ea1m vi t\u1ea7n s\u1ed1 PWM r\u1ed9ng h\u01a1n v\u00e0 duy tr\u00ec \u0111i\u1ec3m tr\u1eafng c\u1ee7a \u0111\u1ea7u ra LED. N\u00f3 c\u0169ng h\u1ed7 tr\u1ee3 \u0111i\u1ec7n \u00e1p tham chi\u1ebfu cao h\u01a1n, gi\u1ea3m l\u1ed7i b\u00f9.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"546\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-6.png\" alt=\"\" class=\"wp-image-12676\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-6.png 800w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-6-300x205.png 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-6-768x524.png 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-6-18x12.png 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Giao di\u1ec7n ph\u1ea7n m\u1ec1m l\u1eadp tr\u00ecnh<\/figcaption><\/figure>\n\n\n\n<p>T\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n boqi, v\u00ed d\u1ee5, \u0111\u1ec1u t\u00edch h\u1ee3p MCU \u0111\u1ec3 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM th\u1ef1c s\u1ef1. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n c\u1ee7a h\u1ecd ch\u1ea5p nh\u1eadn ph\u1ea1m vi \u0111i\u1ec7n \u00e1p t\u00edn hi\u1ec7u PWM r\u1ed9ng, t\u1eeb 3.8V \u0111\u1ebfn 10V, gi\u00fap ch\u00fang t\u01b0\u01a1ng th\u00edch v\u1edbi nhi\u1ec1u t\u00edn hi\u1ec7u PWM kh\u00e1c nhau nh\u01b0 t\u00edn hi\u1ec7u PWM 5V th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"372\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-7.png\" alt=\"\" class=\"wp-image-12677\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-7.png 800w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-7-300x140.png 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-7-768x357.png 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2024\/06\/image-7-18x8.png 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">M\u00f4 t\u1ea3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng t\u1eeb b\u1ea3ng d\u1eef li\u1ec7u b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED<\/figcaption><\/figure>\n\n\n\n<p>Ng\u01b0\u1eddi d\u00f9ng c\u1ea7n ch\u1ecdn ch\u1ebf \u0111\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM trong ph\u1ea7n m\u1ec1m l\u1eadp tr\u00ecnh b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ec3 s\u1eed d\u1ee5ng ch\u1ee9c n\u0103ng n\u00e0y.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">S\u1ef1 k\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p>T\u00f3m l\u1ea1i, \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng PWM l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 v\u00e0 hi\u1ec7u su\u1ea5t cao \u0111\u1ec3 ki\u1ec3m so\u00e1t \u0111\u1ed9 s\u00e1ng LED. \u0110\u1ed9 ch\u00ednh x\u00e1c v\u00e0 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng c\u1ee7a n\u00f3 l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean trong nhi\u1ec1u \u1ee9ng d\u1ee5ng. Hi\u1ec3u r\u00f5 c\u01a1 ch\u1ebf v\u00e0 l\u1ee3i \u00edch c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 gi\u00fap l\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a b\u1ea1n. H\u00e3y ch\u1ecdn c\u00e1c nh\u00e0 cung c\u1ea5p uy t\u00edn nh\u01b0 boqi. H\u1ecd \u0111\u1ea3m b\u1ea3o b\u1ea1n nh\u1eadn \u0111\u01b0\u1ee3c ch\u1ea5t l\u01b0\u1ee3ng cao <a href=\"https:\/\/boqiled.com\/products\/\" data-type=\"URL\" data-id=\"https:\/\/boqiled.com\/products\/\" target=\"_blank\" rel=\"noreferrer noopener\">b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng<\/a>. C\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n mang l\u1ea1i hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 tin c\u1eady v\u01b0\u1ee3t tr\u1ed9i.<\/p>","protected":false},"excerpt":{"rendered":"<p>Pulse Width Modulation (PWM) dimming is a popular technique used to control the brightness of LEDs. It is widely used due to its efficiency and ability to provide precise dimming control. This article explores PWM dimming, its advantages, technical details, and how it compares to other dimming methods. PWM Dimming for LED drivers uses Pulse [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9434,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","footnotes":""},"categories":[20],"tags":[],"class_list":{"0":"post-12671","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-technical-guide"},"_links":{"self":[{"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/posts\/12671","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/comments?post=12671"}],"version-history":[{"count":0,"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/posts\/12671\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/media\/9434"}],"wp:attachment":[{"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/media?parent=12671"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/categories?post=12671"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/tags?post=12671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}