{"id":17668,"date":"2026-03-21T17:47:57","date_gmt":"2026-03-21T09:47:57","guid":{"rendered":"https:\/\/boqiled.com\/?p=17668"},"modified":"2026-03-21T17:47:59","modified_gmt":"2026-03-21T09:47:59","slug":"how-does-a-trailing-edge-dimmer-bq-ttdim-work","status":"publish","type":"post","link":"https:\/\/boqiled.com\/vi\/how-does-a-trailing-edge-dimmer-bq-ttdim-work\/","title":{"rendered":"B\u1ed9 \u0110i\u1ec1u Ch\u1ec9nh \u0110\u1ed9 S\u00e1ng C\u1ea1nh L\u00f9i BQ-TTDIM Ho\u1ea1t \u0110\u1ed9ng Nh\u01b0 Th\u1ebf N\u00e0o?"},"content":{"rendered":"<p>Nhi\u1ec1u \u0111\u00e8n LED nh\u1ea5p nh\u00e1y, k\u00eau \u00f9, ho\u1eb7c kh\u00f4ng th\u1ec3 gi\u1ea3m s\u00e1ng m\u01b0\u1ee3t m\u00e0 v\u1edbi b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng truy\u1ec1n th\u1ed1ng. \u0110i\u1ec1u n\u00e0y g\u00e2y kh\u00f3 ch\u1ecbu cho nh\u00e0 thi\u1ebft k\u1ebf v\u00e0 th\u1ee3 l\u1eafp \u0111\u1eb7t. T\u00f4i th\u01b0\u1eddng th\u1ea5y c\u00e1c d\u1ef1 \u00e1n th\u1ea5t b\u1ea1i ch\u1ec9 v\u00ec c\u00f4ng ngh\u1ec7 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED.<\/p>\n\n\n\n<p><strong>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1ea1nh sau BQ-TTDIM ki\u1ec3m so\u00e1t \u0111\u1ed9 s\u00e1ng LED b\u1eb1ng c\u00e1ch ng\u1eaft \u0111i\u1ec7n t\u1eed d\u1ea1ng s\u00f3ng AC g\u1ea7n cu\u1ed1i m\u1ed7i chu k\u1ef3 n\u1eeda s\u00f3ng. \u0110i\u1ec1u n\u00e0y gi\u1ea3m c\u00f4ng su\u1ea5t truy\u1ec1n t\u1ea3i trong khi duy tr\u00ec \u0111\u1ed9 gi\u1ea3m s\u00e1ng m\u01b0\u1ee3t m\u00e0, ti\u1ebfng \u1ed3n th\u1ea5p, v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch m\u1ea1nh m\u1ebd v\u1edbi c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED hi\u1ec7n \u0111\u1ea1i.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"764\" height=\"1024\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/trailing-edge-dimmer-waveform-phase-cut-LED.jpg\" alt=\"\" class=\"wp-image-17674\" style=\"width:auto;height:500px\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/trailing-edge-dimmer-waveform-phase-cut-LED.jpg 764w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/trailing-edge-dimmer-waveform-phase-cut-LED-224x300.jpg 224w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/trailing-edge-dimmer-waveform-phase-cut-LED-9x12.jpg 9w\" sizes=\"(max-width: 764px) 100vw, 764px\" \/><figcaption class=\"wp-element-caption\">D\u1ea1ng s\u00f3ng \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1ea1nh sau c\u1eaft pha LED<\/figcaption><\/figure>\n\n\n\n<p>Khi l\u00e0m vi\u1ec7c v\u1edbi h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng LED, t\u00f4i lu\u00f4n ch\u00fa \u00fd k\u1ef9 \u0111\u1ebfn c\u00f4ng ngh\u1ec7 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng. Nhi\u1ec1u v\u1ea5n \u0111\u1ec1 trong c\u00e1c d\u1ef1 \u00e1n chi\u1ebfu s\u00e1ng \u0111\u1ebfn t\u1eeb s\u1ef1 hi\u1ec3u sai v\u1ec1 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft pha. Trong h\u01b0\u1edbng d\u1eabn n\u00e0y, t\u00f4i s\u1ebd gi\u1ea3i th\u00edch c\u00e1ch b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1ea1nh sau BQ-TTDIM ho\u1ea1t \u0111\u1ed9ng v\u00e0 t\u1ea1i sao n\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u1edbi c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng Trailing Edge l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p>Nhi\u1ec1u th\u1ee3 l\u1eafp \u0111\u1eb7t gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft pha ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nhau. Gi\u1ea3 \u0111\u1ecbnh n\u00e0y th\u01b0\u1eddng g\u00e2y ra nh\u1ea5p nh\u00e1y ho\u1eb7c \u00e1nh s\u00e1ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh khi s\u1eed d\u1ee5ng \u0111\u00e8n LED.<\/p>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft cu\u1ed1i (trailing edge dimmer) gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 \u00e1nh s\u00e1ng b\u1eb1ng c\u00e1ch t\u1eaft d\u1ea1ng s\u00f3ng AC g\u1ea7n cu\u1ed1i m\u1ed7i n\u1eeda chu k\u1ef3. Thay v\u00ec c\u1eaft ph\u1ea7n \u0111\u1ea7u c\u1ee7a d\u1ea1ng s\u00f3ng, n\u00f3 c\u1eaft ph\u1ea7n cu\u1ed1i \u0111\u1ec3 ki\u1ec3m so\u00e1t n\u0103ng l\u01b0\u1ee3ng c\u1ea5p cho \u0111\u00e8n.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Trailing-edge-dimmer-waveform-diagram-1024x683.jpg\" alt=\"\" class=\"wp-image-17675\" style=\"width:640px\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Trailing-edge-dimmer-waveform-diagram-1024x683.jpg 1024w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Trailing-edge-dimmer-waveform-diagram-300x200.jpg 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Trailing-edge-dimmer-waveform-diagram-768x512.jpg 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Trailing-edge-dimmer-waveform-diagram-18x12.jpg 18w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Trailing-edge-dimmer-waveform-diagram.jpg 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">S\u01a1 \u0111\u1ed3 d\u1ea1ng s\u00f3ng c\u1ee7a b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft cu\u1ed1i<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Hi\u1ec3u Kh\u00e1i Ni\u1ec7m<\/h3>\n\n\n\n<p>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft cu\u1ed1i thu\u1ed9c <strong>h\u1ecd \u0111i\u1ec1u ch\u1ec9nh c\u1eaft pha<\/strong>. B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng s\u1eeda \u0111\u1ed5i s\u00f3ng sin AC c\u1ea5p ngu\u1ed3n cho t\u1ea3i chi\u1ebfu s\u00e1ng. B\u1eb1ng c\u00e1ch lo\u1ea1i b\u1ecf m\u1ed9t ph\u1ea7n d\u1ea1ng s\u00f3ng, b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 \u0111i\u1ec7n \u00e1p RMS c\u1ea5p cho \u0111\u00e8n.<\/p>\n\n\n\n<p>T\u00f4i th\u01b0\u1eddng gi\u1ea3i th\u00edch m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng d\u1ea1ng s\u00f3ng AC nh\u01b0 m\u1ed9t l\u00e0n s\u00f3ng li\u00ean t\u1ee5c. B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng cho ph\u00e9p s\u00f3ng b\u1eaft \u0111\u1ea7u b\u00ecnh th\u01b0\u1eddng. Sau \u0111\u00f3, n\u00f3 t\u1eaft d\u00f2ng \u0111i\u1ec7n tr\u01b0\u1edbc khi s\u00f3ng k\u1ebft th\u00fac. S\u1ef1 c\u1eaft n\u00e0y l\u00e0m gi\u1ea3m t\u1ed5ng n\u0103ng l\u01b0\u1ee3ng \u0111\u1ebfn \u0111\u00e8n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1ch \u0110i\u1ec1u Ch\u1ec9nh \u0110\u1ed9 S\u00e1ng C\u1ea1nh Sau Ho\u1ea1t \u0110\u1ed9ng<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Th\u1eddi Gian C\u1eaft Pha<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Pha<\/th><th>H\u00e0nh \u0111\u1ed9ng<\/th><th>K\u1ebft qu\u1ea3<\/th><\/tr><\/thead><tbody><tr><td>B\u1eaft \u0111\u1ea7u chu k\u1ef3<\/td><td>\u0110i\u1ec7n \u00e1p ch\u1ea1y b\u00ecnh th\u01b0\u1eddng<\/td><td>\u0110\u00e8n nh\u1eadn \u0111i\u1ec7n \u00e1p \u0111\u1ea7y \u0111\u1ee7 trong th\u1eddi gian ng\u1eafn<\/td><\/tr><tr><td>K\u1ebft th\u00fac chu k\u1ef3<\/td><td>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng t\u1eaft \u0111\u1ea7u ra<\/td><td>Gi\u1ea3m t\u1ed5ng n\u0103ng l\u01b0\u1ee3ng<\/td><\/tr><tr><td>L\u1eb7p l\u1ea1i m\u1ed7i n\u1eeda chu k\u1ef3<\/td><td>\u0110i\u1ec1u ch\u1ec9nh li\u00ean t\u1ee5c<\/td><td>Ki\u1ec3m so\u00e1t \u0111\u1ed9 s\u00e1ng m\u01b0\u1ee3t m\u00e0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ea1i Sao Ph\u01b0\u01a1ng Ph\u00e1p N\u00e0y Quan Tr\u1ecdng<\/h3>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft cu\u1ed1i ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u1edbi <strong>t\u1ea3i \u0111i\u1ec7n t\u1eed<\/strong>, \u0111\u1eb7c bi\u1ec7t l\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED. Nhi\u1ec1u b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED ch\u1ee9a t\u1ee5 \u0111i\u1ec7n b\u00ean trong. C\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y t\u01b0\u01a1ng t\u00e1c t\u1ed1t h\u01a1n v\u1edbi s\u1ef1 t\u0103ng \u0111i\u1ec7n \u00e1p s\u1ea1ch thay v\u00ec kh\u1edfi \u0111\u1ea7u \u0111\u1ed9t ng\u1ed9t.<\/p>\n\n\n\n<p>\u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft cu\u1ed1i th\u01b0\u1eddng t\u1ea1o ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00cdt ti\u1ebfng \u1ed3n \u00e2m thanh h\u01a1n<\/li>\n\n\n\n<li>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng \u1edf m\u1ee9c th\u1ea5p t\u1ed1t h\u01a1n<\/li>\n\n\n\n<li>Gi\u1ea3m nh\u1ea5p nh\u00e1y<\/li>\n\n\n\n<li>T\u01b0\u01a1ng th\u00edch cao h\u01a1n v\u1edbi b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Hi\u1ec3u C\u00e1c Nguy\u00ean T\u1eafc C\u01a1 B\u1ea3n c\u1ee7a \u0110i\u1ec1u Ch\u1ec9nh \u0110\u1ed9 S\u00e1ng C\u1ea1nh Sau<\/h2>\n\n\n\n<p>Nhi\u1ec1u chuy\u00ean gia chi\u1ebfu s\u00e1ng hi\u1ec3u thu\u1eadt ng\u1eef \u0111i\u1ec1u ch\u1ec9nh c\u1eaft pha nh\u01b0ng g\u1eb7p kh\u00f3 kh\u0103n trong vi\u1ec7c h\u00ecnh dung c\u00e1ch d\u1ea1ng s\u00f3ng thay \u0111\u1ed5i.<\/p>\n\n\n\n<p>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft cu\u1ed1i ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch cho \u0111i\u1ec7n \u00e1p AC b\u1eaft \u0111\u1ea7u b\u00ecnh th\u01b0\u1eddng v\u00e0 sau \u0111\u00f3 t\u1eaft d\u00f2ng \u0111i\u1ec7n b\u1eb1ng \u0111i\u1ec7n t\u1eed tr\u01b0\u1edbc khi d\u1ea1ng s\u00f3ng k\u1ebft th\u00fac m\u1ed7i n\u1eeda chu k\u1ef3.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"582\" height=\"277\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/AC-waveform-trailing-edge-dimming-diagram.png\" alt=\"\" class=\"wp-image-17676\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/AC-waveform-trailing-edge-dimming-diagram.png 582w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/AC-waveform-trailing-edge-dimming-diagram-300x143.png 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/AC-waveform-trailing-edge-dimming-diagram-18x9.png 18w\" sizes=\"(max-width: 582px) 100vw, 582px\" \/><figcaption class=\"wp-element-caption\">S\u01a1 \u0111\u1ed3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft cu\u1ed1i d\u1ea1ng s\u00f3ng AC<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">D\u1ea1ng S\u00f3ng AC trong H\u1ec7 Th\u1ed1ng Chi\u1ebfu S\u00e1ng<\/h3>\n\n\n\n<p>Trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n b\u00ecnh th\u01b0\u1eddng, \u0111i\u1ec7n \u00e1p tu\u00e2n theo <strong>d\u1ea1ng s\u00f3ng sin<\/strong>. M\u1ed7i chu k\u1ef3 bao g\u1ed3m m\u1ed9t n\u1eeda d\u01b0\u01a1ng v\u00e0 m\u1ed9t n\u1eeda \u00e2m.<\/p>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng \u0111i\u1ec1u khi\u1ec3n d\u1ea1ng s\u00f3ng n\u00e0y. Thay v\u00ec truy\u1ec1n to\u00e0n b\u1ed9 s\u00f3ng sin \u0111\u1ebfn t\u1ea3i, n\u00f3 lo\u1ea1i b\u1ecf m\u1ed9t ph\u1ea7n c\u1ee7a n\u00f3.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">So S\u00e1nh C\u00e1c D\u1ea1ng S\u00f3ng<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Ch\u1ebf \u0111\u1ed9<\/th><th>B\u1eaft \u0111\u1ea7u d\u1ea1ng s\u00f3ng<\/th><th>K\u1ebft th\u00fac d\u1ea1ng s\u00f3ng<\/th><th>T\u1ea3i \u0111i\u1ec3n h\u00ecnh<\/th><\/tr><\/thead><tbody><tr><td>Kh\u00f4ng \u0111i\u1ec1u ch\u1ec9nh<\/td><td>B\u00ecnh th\u01b0\u1eddng<\/td><td>B\u00ecnh th\u01b0\u1eddng<\/td><td>\u0110\u1ed9 s\u00e1ng \u0111\u1ea7y \u0111\u1ee7<\/td><\/tr><tr><td>C\u1eaft \u0111\u1ea7u (leading edge)<\/td><td>B\u1eaft \u0111\u1ea7u tr\u1ec5<\/td><td>K\u1ebft th\u00fac b\u00ecnh th\u01b0\u1eddng<\/td><td>\u0110\u00e8n s\u1ee3i \u0111\u1ed1t<\/td><\/tr><tr><td>C\u1eaft cu\u1ed1i (trailing edge)<\/td><td>B\u1eaft \u0111\u1ea7u b\u00ecnh th\u01b0\u1eddng<\/td><td>C\u1eaft s\u1edbm<\/td><td>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ea1i Sao LED \u01afu Ti\u00ean \u0110i\u1ec1u Ch\u1ec9nh \u0110\u1ed9 S\u00e1ng C\u1ea1nh Sau<\/h3>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED th\u01b0\u1eddng ch\u1ee9a <strong>ngu\u1ed3n chuy\u1ec3n m\u1ea1ch<\/strong>. C\u00e1c m\u1ea1ch n\u00e0y ph\u1ea3n \u1ee9ng kh\u00e1c v\u1edbi s\u1ef1 thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p so v\u1edbi \u0111\u00e8n s\u1ee3i \u0111\u1ed1t.<\/p>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft \u0111\u1ea7u t\u1ea1o ra m\u1ed9t \u0111\u1ec9nh \u0111i\u1ec7n \u00e1p s\u1eafc n\u00e9t \u1edf \u0111\u1ea7u m\u1ed7i chu k\u1ef3. \u0110\u1ec9nh n\u00e0y c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u1ee9ng su\u1ea5t driver<\/li>\n\n\n\n<li>nh\u1ea5p nh\u00e1y<\/li>\n\n\n\n<li>ti\u1ebfng \u1ed3n<\/li>\n\n\n\n<li>\u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/li>\n<\/ul>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft bi\u00ean sau tr\u00e1nh \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 n\u00e0y. \u0110i\u1ec7n \u00e1p t\u0103ng m\u01b0\u1ee3t m\u00e0 v\u00e0 ch\u1ec9 t\u1eaft \u1edf ph\u1ea7n cu\u1ed1i chu k\u1ef3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u01a1 Ch\u1ebf Gi\u1ea3m C\u00f4ng Su\u1ea5t<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">B\u1ea3ng Ki\u1ec3m So\u00e1t N\u0103ng L\u01b0\u1ee3ng<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>M\u1ee9c \u0111\u1ed9 s\u00e1ng<\/th><th>\u0110\u1ed9 d\u00e0i d\u1ea1ng s\u00f3ng<\/th><th>N\u0103ng l\u01b0\u1ee3ng truy\u1ec1n t\u1ea3i<\/th><\/tr><\/thead><tbody><tr><td>100%<\/td><td>D\u1ea1ng s\u00f3ng sin \u0111\u1ea7y \u0111\u1ee7<\/td><td>C\u00f4ng su\u1ea5t t\u1ed1i \u0111a<\/td><\/tr><tr><td>75%<\/td><td>C\u1eaft nh\u1eb9<\/td><td>C\u00f4ng su\u1ea5t gi\u1ea3m<\/td><\/tr><tr><td>50%<\/td><td>N\u1eeda d\u1ea1ng s\u00f3ng<\/td><td>C\u00f4ng su\u1ea5t trung b\u00ecnh<\/td><\/tr><tr><td>25%<\/td><td>C\u1eaft l\u1edbn<\/td><td>C\u00f4ng su\u1ea5t th\u1ea5p<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng li\u00ean t\u1ee5c \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec3m c\u1eaft. S\u1ef1 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9ng n\u00e0y cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng ki\u1ec3m so\u00e1t \u0111\u1ed9 s\u00e1ng m\u01b0\u1ee3t m\u00e0 t\u1eeb c\u00f4ng su\u1ea5t t\u1ed1i \u0111a \u0111\u1ebfn m\u1ee9c \u00e1nh s\u00e1ng th\u1ea5p.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i Sao B\u1ed9 \u0110i\u1ec1u Ch\u1ec9nh \u0110\u1ed9 S\u00e1ng C\u1ea1nh Sau L\u00fd T\u01b0\u1edfng cho Chi\u1ebfu S\u00e1ng LED Hi\u1ec7n \u0110\u1ea1i<\/h2>\n\n\n\n<p>Nhi\u1ec1u k\u1ef9 s\u01b0 chi\u1ebfu s\u00e1ng ph\u00e1t hi\u1ec7n r\u1eb1ng c\u00e1c b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u0169 g\u1eb7p kh\u00f3 kh\u0103n v\u1edbi h\u1ec7 th\u1ed1ng LED. Nh\u1ea5p nh\u00e1y v\u00e0 ti\u1ebfng \u1ed3n xu\u1ea5t hi\u1ec7n khi s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 kh\u00f4ng t\u01b0\u01a1ng th\u00edch.<\/p>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft bi\u00ean sau gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 n\u00e0y v\u00ec ch\u00fang ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u1edbi driver LED \u0111i\u1ec7n t\u1eed v\u00e0 t\u1ea3i c\u00f4ng su\u1ea5t th\u1ea5p.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/modern-led-lighting-dimming-control-system-1024x683.jpg\" alt=\"\" class=\"wp-image-17677\" style=\"width:640px\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/modern-led-lighting-dimming-control-system-1024x683.jpg 1024w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/modern-led-lighting-dimming-control-system-300x200.jpg 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/modern-led-lighting-dimming-control-system-768x512.jpg 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/modern-led-lighting-dimming-control-system-18x12.jpg 18w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/modern-led-lighting-dimming-control-system.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">H\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng chi\u1ebfu s\u00e1ng LED hi\u1ec7n \u0111\u1ea1i<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u01b0\u01a1ng Th\u00edch v\u1edbi B\u1ed9 \u0110i\u1ec1u Khi\u1ec3n \u0110i\u1ec7n T\u1eed<\/h3>\n\n\n\n<p>Driver LED hi\u1ec7n \u0111\u1ea1i ch\u1ee9a c\u00e1c linh ki\u1ec7n b\u00ean trong nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>b\u1ed9 ch\u1ec9nh l\u01b0u c\u1ea7u<\/li>\n\n\n\n<li>t\u1ee5 \u0111i\u1ec7n<\/li>\n\n\n\n<li>b\u1ed9 chuy\u1ec3n \u0111\u1ed5i chuy\u1ec3n m\u1ea1ch<\/li>\n<\/ul>\n\n\n\n<p>C\u00e1c m\u1ea1ch n\u00e0y y\u00eau c\u1ea7u chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n \u00e1p \u1ed5n \u0111\u1ecbnh. B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft bi\u00ean sau t\u1ea1o ra chuy\u1ec3n m\u1ea1ch m\u01b0\u1ee3t m\u00e0 h\u01a1n so v\u1edbi thi\u1ebft b\u1ecb c\u1eaft bi\u00ean tr\u01b0\u1edbc.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">B\u1ea3ng T\u01b0\u01a1ng Th\u00edch<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Lo\u1ea1i t\u1ea3i<\/th><th>C\u1eaft bi\u00ean tr\u01b0\u1edbc<\/th><th>C\u1eaft bi\u00ean sau<\/th><\/tr><\/thead><tbody><tr><td>\u0110\u00e8n s\u1ee3i \u0111\u1ed1t<\/td><td>Xu\u1ea5t s\u1eafc<\/td><td>T\u1ed1t<\/td><\/tr><tr><td>\u0110\u00e8n halogen<\/td><td>Xu\u1ea5t s\u1eafc<\/td><td>T\u1ed1t<\/td><\/tr><tr><td>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED<\/td><td>H\u1ea1n ch\u1ebf<\/td><td>Xu\u1ea5t s\u1eafc<\/td><\/tr><tr><td>Bi\u1ebfn \u00e1p \u0111i\u1ec7n t\u1eed<\/td><td>Trung b\u00ecnh<\/td><td>Xu\u1ea5t s\u1eafc<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">C\u1ea3i Thi\u1ec7n Hi\u1ec7u Su\u1ea5t T\u1ea3i Th\u1ea5p<\/h3>\n\n\n\n<p>H\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng LED th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng \u1edf c\u00f4ng su\u1ea5t th\u1ea5p. B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng truy\u1ec1n th\u1ed1ng th\u01b0\u1eddng y\u00eau c\u1ea7u <strong>t\u1ea3i t\u1ed1i thi\u1ec3u<\/strong> \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft bi\u00ean sau ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u00f4ng su\u1ea5t th\u1ea5p n\u00e0y. Ch\u00fang c\u00f3 th\u1ec3 duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh ngay c\u1ea3 khi t\u1ea3i nh\u1ecf.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Gi\u1ea3m Nhi\u1ec5u \u0110i\u1ec7n<\/h3>\n\n\n\n<p>M\u1ed9t l\u1ee3i \u00edch kh\u00e1c t\u00f4i th\u01b0\u1eddng nh\u1eadn th\u1ea5y l\u00e0 gi\u1ea3m nhi\u1ec5u \u0111i\u1ec7n t\u1eeb. \u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft bi\u00ean sau t\u1ea1o ra \u00edt nhi\u1ec5u \u0111i\u1ec7n h\u01a1n v\u00ec d\u1ea1ng s\u00f3ng b\u1eaft \u0111\u1ea7u t\u1ef1 nhi\u00ean.<\/p>\n\n\n\n<p>S\u1ef1 c\u1ea3i thi\u1ec7n n\u00e0y mang l\u1ea1i:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>v\u1eadn h\u00e0nh \u00eam h\u01a1n<\/li>\n\n\n\n<li>\u00edt nhi\u1ec5u h\u01a1n v\u1edbi c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c<\/li>\n\n\n\n<li>ph\u1ea3n h\u1ed3i \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng m\u01b0\u1ee3t m\u00e0 h\u01a1n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/www.lamps-on-line.com\/leading-trailing-edge-led-dimmers\" data-type=\"link\" data-id=\"https:\/\/www.lamps-on-line.com\/leading-trailing-edge-led-dimmers\">Kh\u00e1c Bi\u1ec7t Gi\u1eefa \u0110i\u1ec1u Ch\u1ec9nh \u0110\u1ed9 S\u00e1ng C\u1ea1nh Tr\u01b0\u1edbc v\u00e0 C\u1ea1nh Sau<\/a><\/h2>\n\n\n\n<p>Nhi\u1ec1u ng\u01b0\u1eddi nh\u1ea7m l\u1eabn gi\u1eefa hai c\u00f4ng ngh\u1ec7 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng n\u00e0y. Tuy nhi\u00ean, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u1eb7c t\u00ednh hi\u1ec7u su\u1ea5t c\u1ee7a ch\u00fang r\u1ea5t kh\u00e1c nhau.<\/p>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft bi\u00ean tr\u01b0\u1edbc c\u1eaft ph\u1ea7n \u0111\u1ea7u c\u1ee7a d\u1ea1ng s\u00f3ng AC, trong khi b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft bi\u00ean sau c\u1eaft ph\u1ea7n cu\u1ed1i c\u1ee7a d\u1ea1ng s\u00f3ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"458\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2025\/12\/Leading-edge-vs-trailing-edge-waveform.jpg\" alt=\"\" class=\"wp-image-17394\" style=\"width:600px\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2025\/12\/Leading-edge-vs-trailing-edge-waveform.jpg 800w, https:\/\/boqiled.com\/wp-content\/uploads\/2025\/12\/Leading-edge-vs-trailing-edge-waveform-300x172.jpg 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2025\/12\/Leading-edge-vs-trailing-edge-waveform-768x440.jpg 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2025\/12\/Leading-edge-vs-trailing-edge-waveform-18x10.jpg 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">So s\u00e1nh d\u1ea1ng s\u00f3ng c\u1eaft bi\u00ean tr\u01b0\u1edbc v\u00e0 c\u1eaft bi\u00ean sau<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Nguy\u00ean T\u1eafc Ho\u1ea1t \u0110\u1ed9ng C\u01a1 B\u1ea3n<\/h3>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft bi\u00ean tr\u01b0\u1edbc d\u1ef1a v\u00e0o linh ki\u1ec7n TRIAC k\u00edch ho\u1ea1t sau m\u1ed9t \u0111\u1ed9 tr\u1ec5. D\u1ea1ng s\u00f3ng b\u1eaft \u0111\u1ea7u \u0111\u1ed9t ng\u1ed9t khi TRIAC k\u00edch ho\u1ea1t.<\/p>\n\n\n\n<p>B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1eaft bi\u00ean sau ho\u1ea1t \u0111\u1ed9ng kh\u00e1c bi\u1ec7t. Ch\u00fang cho ph\u00e9p d\u1ea1ng s\u00f3ng b\u1eaft \u0111\u1ea7u b\u00ecnh th\u01b0\u1eddng v\u00e0 sau \u0111\u00f3 ng\u1eaft d\u00f2ng \u0111i\u1ec7n \u1edf ph\u1ea7n cu\u1ed1i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">So S\u00e1nh K\u1ef9 Thu\u1eadt<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>T\u00ednh n\u0103ng<\/th><th>C\u1eaft bi\u00ean tr\u01b0\u1edbc<\/th><th>C\u1eaft bi\u00ean sau<\/th><\/tr><\/thead><tbody><tr><td>Ki\u1ec3m so\u00e1t d\u1ea1ng s\u00f3ng<\/td><td>C\u1eaft \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u<\/td><td>C\u1eaft \u0111i\u1ec3m k\u1ebft th\u00fac<\/td><\/tr><tr><td>Linh ki\u1ec7n chuy\u1ec3n m\u1ea1ch<\/td><td>TRIAC<\/td><td>MOSFET<\/td><\/tr><tr><td>M\u1ee9c \u0111\u1ed9 ti\u1ebfng \u1ed3n<\/td><td>Cao h\u01a1n<\/td><td>Th\u1ea5p h\u01a1n<\/td><\/tr><tr><td>LED compatibility<\/td><td>Trung b\u00ecnh<\/td><td>Xu\u1ea5t s\u1eafc<\/td><\/tr><tr><td>Dimming smoothness<\/td><td>H\u1ea1n ch\u1ebf<\/td><td>M\u01b0\u1ee3t m\u00e0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00e1c \u0110\u1ed9ng \u0111\u1ebfn H\u1ec7 Th\u1ed1ng LED<\/h3>\n\n\n\n<p>Leading edge dimmers often produce:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>buzzing noise<\/li>\n\n\n\n<li>visible flicker<\/li>\n\n\n\n<li>unstable brightness<\/li>\n<\/ul>\n\n\n\n<p>Trailing edge dimmers minimize these problems because their switching method is gentler.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00ed D\u1ee5 Th\u1ef1c T\u1ebf<\/h3>\n\n\n\n<p>In many projects I worked on, replacing a leading edge dimmer with a trailing edge unit instantly solved flicker issues. The LED drivers responded much better once the waveform switching changed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c Th\u00e0nh Ph\u1ea7n Ch\u00ednh B\u00ean Trong B\u1ed9 \u0110i\u1ec1u Ch\u1ec9nh \u0110\u1ed9 S\u00e1ng C\u1ea1nh Sau<\/h2>\n\n\n\n<p>Many users see a dimmer as a simple knob. However, inside the device there is a carefully designed electronic circuit.<\/p>\n\n\n\n<p>A trailing edge dimmer uses semiconductor switches, control circuits, and protection components to regulate the AC waveform.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1016\" height=\"494\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Internal-components-of-trailing-edge-dimmer-circuit.jpg\" alt=\"\" class=\"wp-image-17678\" style=\"width:600px\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Internal-components-of-trailing-edge-dimmer-circuit.jpg 1016w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Internal-components-of-trailing-edge-dimmer-circuit-300x146.jpg 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Internal-components-of-trailing-edge-dimmer-circuit-768x373.jpg 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/Internal-components-of-trailing-edge-dimmer-circuit-18x9.jpg 18w\" sizes=\"(max-width: 1016px) 100vw, 1016px\" \/><figcaption class=\"wp-element-caption\">Internal components of trailing edge dimmer circuit<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1c Y\u1ebfu T\u1ed1 Ph\u1ea7n C\u1ee9ng Ch\u00ednh<\/h3>\n\n\n\n<p>Typical components include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>switching transistors<\/li>\n\n\n\n<li>control microcircuits<\/li>\n\n\n\n<li>sensing circuits<\/li>\n\n\n\n<li>protection modules<\/li>\n<\/ul>\n\n\n\n<p>These components work together to control the phase cut timing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ebfn Tr\u00fac N\u1ed9i B\u1ed9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">B\u1ea3ng Ch\u1ee9c N\u0103ng Th\u00e0nh Ph\u1ea7n<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Linh ki\u1ec7n<\/th><th>Vai tr\u00f2<\/th><\/tr><\/thead><tbody><tr><td>MOSFET or transistor<\/td><td>Switches AC current<\/td><\/tr><tr><td>IC \u0111i\u1ec1u khi\u1ec3n<\/td><td>Determines dimming angle<\/td><\/tr><tr><td>T\u1ee5 \u0111i\u1ec7n<\/td><td>Filter noise<\/td><\/tr><tr><td>Thermal sensor<\/td><td>Prevents overheating<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u01b0\u01a1ng T\u00e1c Gi\u1eefa C\u00e1c Th\u00e0nh Ph\u1ea7n<\/h3>\n\n\n\n<p>When a user adjusts the knob, the control circuit calculates a new phase angle. The switching transistor then turns off the waveform at the correct moment.<\/p>\n\n\n\n<p>Protection circuits constantly monitor the system. If abnormal conditions occur, the dimmer automatically shuts down to protect itself and the connected load.<\/p>\n\n\n\n<p>This combination of control and protection makes modern trailing edge dimmers reliable for long-term lighting applications.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1ch C\u00f4ng Ngh\u1ec7 C\u1eaft Pha Ki\u1ec3m So\u00e1t \u0110\u1ed9 S\u00e1ng<\/h2>\n\n\n\n<p>Many lighting designers know that dimmers reduce brightness. But fewer understand the electrical mechanism behind this process.<\/p>\n\n\n\n<p>Phase-cut technology controls light output by removing a portion of each AC waveform cycle, which reduces the RMS voltage delivered to the load.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Gi\u1ea3m \u0110i\u1ec7n \u00c1p RMS<\/h3>\n\n\n\n<p>The brightness of many lighting loads depends on the <strong>RMS voltage<\/strong> supplied to them.<\/p>\n\n\n\n<p>When the dimmer cuts part of the waveform, the RMS voltage drops. Lower voltage means less electrical power and therefore lower light output.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">M\u1ed1i Quan H\u1ec7 C\u00f4ng Su\u1ea5t<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">M\u1ed1i Quan H\u1ec7 \u0110i\u1ec7n \u00c1p v\u00e0 C\u00f4ng Su\u1ea5t<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>M\u1ee9c \u0111\u1ed9 s\u00e1ng<\/th><th>RMS Voltage<\/th><th>Relative Power<\/th><\/tr><\/thead><tbody><tr><td>100%<\/td><td>Full voltage<\/td><td>100%<\/td><\/tr><tr><td>75%<\/td><td>Reduced<\/td><td>75%<\/td><\/tr><tr><td>50%<\/td><td>Medium<\/td><td>50%<\/td><\/tr><tr><td>25%<\/td><td>Th\u1ea5p<\/td><td>25%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ec3m So\u00e1t Li\u00ean T\u1ee5c<\/h3>\n\n\n\n<p>The dimmer adjusts the cutoff point in every half cycle. This rapid adjustment happens many times per second.<\/p>\n\n\n\n<p>Because AC power cycles quickly, the human eye perceives the light as continuously adjustable rather than flickering.<\/p>\n\n\n\n<p>This technique allows precise brightness control without changing the electrical supply frequency.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nguy\u00ean T\u1eafc Ho\u1ea1t \u0110\u1ed9ng c\u1ee7a B\u1ed9 \u0110i\u1ec1u Ch\u1ec9nh \u0110\u1ed9 S\u00e1ng C\u1ea1nh Sau BQ-TTDIM<\/h2>\n\n\n\n<p>Many dimmers appear similar on the outside. However, their internal design and performance can vary significantly.<\/p>\n\n\n\n<p>The BQ-TTDIM trailing edge dimmer controls LED brightness through rotary phase-cut control, allowing users to adjust brightness while maintaining compatibility with dimmable LED drivers and traditional lamps.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><a href=\"https:\/\/boqiled.com\/products\/led-dimmer\/triac-dimmer\/\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/BQ-TTDIM-rotary-dimmer-panel1-1024x683.jpg\" alt=\"\" class=\"wp-image-17680\" style=\"width:600px;height:auto\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/BQ-TTDIM-rotary-dimmer-panel1-1024x683.jpg 1024w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/BQ-TTDIM-rotary-dimmer-panel1-300x200.jpg 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/BQ-TTDIM-rotary-dimmer-panel1-768x512.jpg 768w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/BQ-TTDIM-rotary-dimmer-panel1-18x12.jpg 18w, https:\/\/boqiled.com\/wp-content\/uploads\/2026\/03\/BQ-TTDIM-rotary-dimmer-panel1.jpg 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/boqiled.com\/products\/led-dimmer\/triac-dimmer\/\">BQ-TTDIM<\/a> rotary dimmer panel<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ed5ng Quan Thi\u1ebft B\u1ecb<\/h3>\n\n\n\n<p>According to the product specification, the BQ-TTDIM is a <strong>rotary AC phase-cut dimmer with one output channel<\/strong> designed for dimmable LED lamps, incandescent lights, and halogen lamps.<\/p>\n\n\n\n<p>The device operates within:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Tham s\u1ed1<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>Input voltage<\/td><td>AC200-240V<\/td><\/tr><tr><td>D\u00f2ng \u0111i\u1ec7n \u0111\u1ea7u ra<\/td><td>T\u1ed1i \u0111a 1,25A<\/td><\/tr><tr><td>Output power<\/td><td>3-400W<\/td><\/tr><tr><td>Ph\u1ea1m vi l\u00e0m m\u1edd<\/td><td>0-100%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>These values come directly from the specification sheet.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Giao Di\u1ec7n \u0110i\u1ec1u Khi\u1ec3n<\/h3>\n\n\n\n<p>The dimmer uses a rotary knob. Users rotate the knob to change brightness and push it to turn the light on or off.<\/p>\n\n\n\n<p>The device also supports a <strong>minimum brightness setting<\/strong> and memory function. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">M\u00f4i Tr\u01b0\u1eddng Ho\u1ea1t \u0110\u1ed9ng<\/h3>\n\n\n\n<p>The dimmer is designed for stable operation in demanding conditions.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Tham s\u1ed1<\/th><th>S\u1ef1 ch\u1ec9 r\u00f5<\/th><\/tr><\/thead><tbody><tr><td>Operating temperature<\/td><td>\u221230\u00b0C to +55\u00b0C<\/td><\/tr><tr><td>Case temperature<\/td><td>Up to 85\u00b0C<\/td><\/tr><tr><td>IP rating<\/td><td>IP20<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>These specifications ensure the dimmer can operate reliably in typical indoor installations.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quy Tr\u00ecnh T\u1eebng B\u01b0\u1edbc c\u1ee7a C\u1eaft Pha C\u1ea1nh Sau<\/h2>\n\n\n\n<p>Many engineers ask how the dimmer actually modifies each AC cycle in real time.<\/p>\n\n\n\n<p>Trailing edge phase cutting works by monitoring the AC waveform and switching off the current near the end of each half cycle.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Chu\u1ed7i \u0110i\u1ec1u Khi\u1ec3n Pha<\/h3>\n\n\n\n<p>Each AC cycle goes through a simple sequence controlled by the dimmer electronics.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Tr\u00ecnh T\u1ef1 Ho\u1ea1t \u0110\u1ed9ng<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Step<\/th><th>H\u00e0nh \u0111\u1ed9ng<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>Detect zero crossing<\/td><\/tr><tr><td>2<\/td><td>Allow voltage to rise normally<\/td><\/tr><tr><td>3<\/td><td>Calculate dimming level<\/td><\/tr><tr><td>4<\/td><td>Switch off current before waveform end<\/td><\/tr><tr><td>5<\/td><td>Repeat every cycle<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ec3m So\u00e1t Th\u1eddi Gian<\/h3>\n\n\n\n<p>The dimmer must control switching with high precision. Even small timing changes can alter brightness.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>late cutoff \u2192 brighter light<\/li>\n\n\n\n<li>early cutoff \u2192 dimmer light<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u1ea3n H\u1ed3i Li\u00ean T\u1ee5c<\/h3>\n\n\n\n<p>The control circuit repeats this process for every half cycle of AC power. Because AC cycles occur 50 or 60 times per second, the dimming adjustment feels instantaneous to users.<\/p>\n\n\n\n<p>This precise timing control is the core technology behind phase-cut dimming systems.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1ch BQ-TTDIM \u0110i\u1ec1u Ch\u1ec9nh \u0110i\u1ec7n \u00c1p \u0111\u1ec3 Gi\u1ea3m S\u00e1ng \u0110\u00e8n LED<\/h2>\n\n\n\n<p>Many people think a dimmer simply reduces voltage. In reality, it controls the waveform shape rather than directly lowering supply voltage.<\/p>\n\n\n\n<p>The BQ-TTDIM adjusts the effective voltage reaching the LED driver by cutting part of the AC waveform through phase control.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/boqiled.com\/products\/triac-dimmable-led-driver\/triac-led-driver-75-240w-constant-voltage\/\"><img loading=\"lazy\" decoding=\"async\" width=\"536\" height=\"358\" src=\"https:\/\/boqiled.com\/wp-content\/uploads\/2025\/07\/Compatible-with-both-forward-phase-and-reverse-phase-dimmers.jpg\" alt=\"\" class=\"wp-image-13845\" style=\"width:536px;height:auto\" srcset=\"https:\/\/boqiled.com\/wp-content\/uploads\/2025\/07\/Compatible-with-both-forward-phase-and-reverse-phase-dimmers.jpg 536w, https:\/\/boqiled.com\/wp-content\/uploads\/2025\/07\/Compatible-with-both-forward-phase-and-reverse-phase-dimmers-300x200.jpg 300w, https:\/\/boqiled.com\/wp-content\/uploads\/2025\/07\/Compatible-with-both-forward-phase-and-reverse-phase-dimmers-18x12.jpg 18w\" sizes=\"(max-width: 536px) 100vw, 536px\" \/><\/a><figcaption class=\"wp-element-caption\">boqi <a href=\"https:\/\/boqiled.com\/products\/triac-dimmable-led-driver\/\">Dimmable LED driver<\/a> compatible with both forward phase and reverse phase dimmers<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ec3m So\u00e1t \u0110i\u1ec7n \u00c1p Hi\u1ec7u Qu\u1ea3<\/h3>\n\n\n\n<p>Instead of changing the supply voltage, the dimmer changes the <strong>duration of power delivery<\/strong>.<\/p>\n\n\n\n<p>This technique modifies the RMS voltage seen by the LED driver.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">B\u1ea3ng \u0110i\u1ec1u Ch\u1ec9nh \u0110i\u1ec7n \u00c1p<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Cut Angle<\/th><th>Effective Voltage<\/th><th>\u0110\u1ed9 s\u00e1ng \u0111\u1ea7u ra<\/th><\/tr><\/thead><tbody><tr><td>Small cut<\/td><td>High voltage<\/td><td>Bright<\/td><\/tr><tr><td>Medium cut<\/td><td>Medium voltage<\/td><td>Trung b\u00ecnh<\/td><\/tr><tr><td>C\u1eaft l\u1edbn<\/td><td>Low voltage<\/td><td>Dim<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u01b0\u01a1ng T\u00e1c v\u1edbi B\u1ed9 \u0110i\u1ec1u Khi\u1ec3n LED<\/h3>\n\n\n\n<p>LED drivers interpret the phase-cut waveform and adjust internal current accordingly.<\/p>\n\n\n\n<p>A well-designed driver detects the waveform shape and modifies its output to the LEDs.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">H\u00e0nh Vi Gi\u1ea3m S\u00e1ng M\u01b0\u1ee3t M\u00e0<\/h3>\n\n\n\n<p>Because the dimmer controls timing very precisely, brightness changes appear smooth and gradual.<\/p>\n\n\n\n<p>This characteristic is important in applications like:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>chi\u1ebfu s\u00e1ng khu d\u00e2n c\u01b0<\/li>\n\n\n\n<li>hospitality lighting<\/li>\n\n\n\n<li>architectural lighting<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">S\u1ef1 k\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p>The BQ-TTDIM trailing edge dimmer delivers smooth LED dimming by cutting the AC waveform near the end of each cycle, ensuring quiet operation, high compatibility, and stable lighting performance.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Many LED lights flicker, buzz, or fail to dim smoothly with traditional dimmers. This frustrates designers and installers. I often see projects fail simply because the dimming technology does not match the LED driver. A BQ-TTDIM trailing-edge dimmer controls LED brightness by electronically switching off the AC waveform near the end of each half cycle. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":17684,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"How BQ-TTDIM Trailing Edge Dimmer Works for LED Lighting","_seopress_titles_desc":"Learn how the BQ-TTDIM trailing edge dimmer controls LED brightness using phase-cut technology. Discover its working principle, waveform operation, and why it delivers smooth, flicker-free dimming with modern LED drivers. Ideal for designers and installers seeking reliable, low-noise lighting performance and high compatibility with electronic loads.","_seopress_robots_index":"","footnotes":""},"categories":[549],"tags":[],"class_list":{"0":"post-17668","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-triac-dimmer"},"_links":{"self":[{"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/posts\/17668","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=17668"}],"version-history":[{"count":0,"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/posts\/17668\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/media\/17684"}],"wp:attachment":[{"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/media?parent=17668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/categories?post=17668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/boqiled.com\/vi\/wp-json\/wp\/v2\/tags?post=17668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}