{"id":576055,"date":"2026-08-05T08:57:19","date_gmt":"2026-08-05T01:57:19","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=576055"},"modified":"2026-08-05T08:59:06","modified_gmt":"2026-08-05T01:59:06","slug":"pwm-la-gi","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/pwm-la-gi\/","title":{"rendered":"PWM l\u00e0 g\u00ec? \u1ea2nh h\u01b0\u1edfng c\u1ee7a PWM m\u00e0n h\u00ecnh t\u1edbi m\u1eaft"},"content":{"rendered":"<p data-pm-slice=\"1 1 []\">PWM (Pulse Width Modulation &#8211; \u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung) l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt \u0111i\u1ec1u ch\u1ec9nh c\u00f4ng su\u1ea5t b\u1eb1ng c\u00e1ch b\u1eadt\/t\u1eaft ngu\u1ed3n \u0111i\u1ec7n r\u1ea5t nhanh theo chu k\u1ef3. Tr\u00ean m\u00e0n h\u00ecnh \u0111i\u1ec7n tho\u1ea1i, PWM \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng: thay v\u00ec gi\u1ea3m \u0111i\u1ec7n \u00e1p, m\u00e0n h\u00ecnh ch\u1edbp t\u1eaft c\u1ef1c nhanh (m\u1eaft th\u01b0\u1eddng kh\u00f4ng th\u1ea5y) \u0111\u1ec3 t\u1ea1o c\u1ea3m gi\u00e1c s\u00e1ng h\u01a1n ho\u1eb7c t\u1ed1i h\u01a1n. PWM gi\u00fap \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng hi\u1ec7u qu\u1ea3 v\u00e0 gi\u1eef m\u00e0u ch\u00ednh x\u00e1c, nh\u01b0ng \u1edf t\u1ea7n s\u1ed1 th\u1ea5p c\u00f3 th\u1ec3 g\u00e2y m\u1ecfi m\u1eaft, nh\u1ee9c \u0111\u1ea7u v\u1edbi ng\u01b0\u1eddi nh\u1ea1y c\u1ea3m. \u0110\u00e2y l\u00e0 kh\u00e1i ni\u1ec7m \u0111\u01b0\u1ee3c nh\u1eafc nhi\u1ec1u khi b\u00e0n v\u1ec1 \u0111\u1ed9 s\u00e1ng m\u00e0n h\u00ecnh <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/man-hinh-oled\/\">OLED<\/a> v\u00e0 s\u1ee9c kh\u1ecfe th\u1ecb gi\u00e1c. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1ea3i th\u00edch chi ti\u1ebft PWM l\u00e0 g\u00ec, \u1ee9ng d\u1ee5ng v\u00e0 \u1ea3nh h\u01b0\u1edfng t\u1edbi m\u1eaft.<\/p>\n<h2>PWM l\u00e0 g\u00ec?<\/h2>\n<p data-pm-slice=\"1 1 []\">PWM l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Pulse Width Modulation \u2014 \u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung. \u0110\u00e2y l\u00e0 k\u1ef9 thu\u1eadt \u0111i\u1ec1u khi\u1ec3n c\u00f4ng su\u1ea5t \u0111i\u1ec7n b\u1eb1ng c\u00e1ch b\u1eadt v\u00e0 t\u1eaft ngu\u1ed3n \u0111i\u1ec7n r\u1ea5t nhanh theo chu k\u1ef3, thay v\u00ec c\u1ea5p \u0111i\u1ec7n li\u00ean t\u1ee5c.<\/p>\n<p>B\u1eb1ng c\u00e1ch thay \u0111\u1ed5i t\u1ec9 l\u1ec7 th\u1eddi gian &#8220;b\u1eadt&#8221; so v\u1edbi &#8220;t\u1eaft&#8221; trong m\u1ed7i chu k\u1ef3 (g\u1ecdi l\u00e0 chu k\u1ef3 nhi\u1ec7m v\u1ee5 &#8211; duty cycle), ng\u01b0\u1eddi ta \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c c\u00f4ng su\u1ea5t trung b\u00ecnh c\u1ea5p cho thi\u1ebft b\u1ecb. V\u00ed d\u1ee5, n\u1ebfu b\u1eadt 50% th\u1eddi gian v\u00e0 t\u1eaft 50% th\u1eddi gian, c\u00f4ng su\u1ea5t trung b\u00ecnh b\u1eb1ng m\u1ed9t n\u1eeda.<\/p>\n<p data-pm-slice=\"1 1 []\">PWM \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong ng\u00e0nh \u0111i\u1ec7n t\u1eed \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 \u0111\u1ed9ng c\u01a1, \u0111\u1ed9 s\u00e1ng \u0111\u00e8n LED, v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng m\u00e0n h\u00ecnh. Tr\u00ean <strong>m\u00e0n h\u00ecnh<\/strong> \u0111i\u1ec7n tho\u1ea1i (nh\u1ea5t l\u00e0 t\u1ea5m n\u1ec1n OLED), PWM l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn \u0111\u1ec3 t\u0103ng ho\u1eb7c gi\u1ea3m \u0111\u1ed9 s\u00e1ng: m\u00e0n h\u00ecnh ch\u1edbp t\u1eaft c\u1ef1c nhanh v\u00e0 t\u1ef7 l\u1ec7 th\u1eddi gian s\u00e1ng trong m\u1ed9t chu k\u1ef3 s\u1ebd quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 s\u00e1ng m\u00e0 m\u1eaft ng\u01b0\u1eddi c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c. V\u00ec t\u1ed1c \u0111\u1ed9 ch\u1edbp nh\u00e1y di\u1ec5n ra c\u1ef1c k\u1ef3 nhanh, m\u1eaft th\u01b0\u1eddng kh\u00f4ng th\u1ec3 nh\u1eadn ra m\u00e0 ch\u1ec9 th\u1ea5y m\u00e0n h\u00ecnh \u0111ang hi\u1ec3n th\u1ecb m\u1ed9t m\u1ee9c s\u00e1ng li\u00ean t\u1ee5c.<\/p>\n<p data-pm-slice=\"1 1 []\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-576536 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-1.jpg\" alt=\"pwm-la-gi-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>PWM \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng m\u00e0n h\u00ecnh th\u1ebf n\u00e0o?<\/h2>\n<p data-pm-slice=\"1 1 []\">Hi\u1ec7n nay c\u00f3 hai ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng m\u00e0n h\u00ecnh:<\/p>\n<ul>\n<li>DC Dimming: \u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng b\u1eb1ng c\u00e1ch h\u1ea1 tr\u1ef1c ti\u1ebfp \u0111i\u1ec7n \u00e1p ho\u1eb7c d\u00f2ng \u0111i\u1ec7n c\u1ea5p cho m\u00e0n h\u00ecnh.<\/li>\n<li>PWM Dimming: \u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng b\u1eb1ng c\u00e1ch b\u1eadt\/t\u1eaft m\u00e0n h\u00ecnh li\u00ean t\u1ee5c \u1edf t\u1ea7n s\u1ed1 cao.<\/li>\n<\/ul>\n<p>V\u1edbi PWM Dimming, m\u00e0n h\u00ecnh kh\u00f4ng th\u1ef1c s\u1ef1 gi\u1ea3m \u0111\u1ed9 s\u00e1ng g\u1ed1c c\u1ee7a c\u00e1c \u0111i\u1ec3m \u1ea3nh. Khi b\u1ea1n k\u00e9o gi\u1ea3m thanh \u0111\u1ed9 s\u00e1ng, th\u1eddi gian &#8220;t\u1eaft&#8221; trong m\u1ed7i chu k\u1ef3 s\u1ebd k\u00e9o d\u00e0i ra, l\u00e0m cho m\u1eaft c\u1ea3m nh\u1eadn kh\u00f4ng gian hi\u1ec3n th\u1ecb t\u1ed1i \u0111i.<\/p>\n<p>\u01afu \u0111i\u1ec3m l\u1edbn nh\u1ea5t c\u1ee7a PWM l\u00e0 gi\u1eef m\u00e0u s\u1eafc ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u \u1edf m\u1ecdi m\u1ee9c s\u00e1ng \u2014 y\u1ebfu t\u1ed1 \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi m\u00e0n h\u00ecnh OLED (n\u01a1i vi\u1ec7c gi\u1ea3m \u0111i\u1ec7n \u00e1p tr\u1ef1c ti\u1ebfp d\u1ec5 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng l\u1ec7ch m\u00e0u \u1edf \u0111\u1ed9 s\u00e1ng th\u1ea5p).<\/p>\n<p>Tuy nhi\u00ean, nh\u01b0\u1ee3c \u0111i\u1ec3m l\u00e0 \u1edf t\u1ea7n s\u1ed1 PWM th\u1ea5p, s\u1ef1 ch\u1edbp t\u1eaft n\u00e0y c\u00f3 th\u1ec3 g\u00e2y kh\u00f3 ch\u1ecbu cho m\u1eaft m\u1ed9t s\u1ed1 ng\u01b0\u1eddi. T\u1ea7n s\u1ed1 PWM (\u0111o b\u1eb1ng Hz) c\u00e0ng cao th\u00ec c\u00e0ng \u00edt \u1ea3nh h\u01b0\u1edfng \u2013 c\u00e1c m\u00e0n h\u00ecnh hi\u1ec7n \u0111\u1ea1i \u0111ang t\u0103ng t\u1ea7n s\u1ed1 PWM (t\u1eeb 240Hz l\u00ean 480Hz, 1920Hz, th\u1eadm ch\u00ed cao h\u01a1n) \u0111\u1ec3 gi\u1ea3m t\u00e1c \u0111\u1ed9ng t\u1edbi m\u1eaft.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-576537 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-2.jpg\" alt=\"pwm-la-gi-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>PWM v\u00e0 s\u1ee9c kh\u1ecfe m\u1eaft<\/h2>\n<table>\n<thead>\n<tr>\n<th>Y\u1ebfu t\u1ed1<\/th>\n<th>\u1ea2nh h\u01b0\u1edfng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T\u1ea7n s\u1ed1 PWM th\u1ea5p<\/td>\n<td>D\u1ec5 g\u00e2y m\u1ecfi m\u1eaft, nh\u1ee9c \u0111\u1ea7u v\u1edbi ng\u01b0\u1eddi nh\u1ea1y c\u1ea3m<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea7n s\u1ed1 PWM cao<\/td>\n<td>\u00cdt \u1ea3nh h\u01b0\u1edfng, d\u1ec5 ch\u1ecbu h\u01a1n cho m\u1eaft<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9 s\u00e1ng th\u1ea5p<\/td>\n<td>PWM th\u01b0\u1eddng r\u00f5 h\u01a1n khi \u0111\u1ec3 m\u00e0n t\u1ed1i (bu\u1ed5i t\u1ed1i)<\/td>\n<\/tr>\n<tr>\n<td>Ng\u01b0\u1eddi nh\u1ea1y c\u1ea3m<\/td>\n<td>C\u00f3 th\u1ec3 nh\u1ee9c \u0111\u1ea7u, m\u1ecfi m\u1eaft d\u00f9 kh\u00f4ng th\u1ea5y nh\u1ea5p nh\u00e1y<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>L\u01b0u \u00fd: \u0111\u00e2y l\u00e0 th\u00f4ng tin tham kh\u1ea3o chung; m\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng kh\u00e1c nhau t\u00f9y t\u1eebng ng\u01b0\u1eddi. N\u1ebfu b\u1ea1n th\u01b0\u1eddng m\u1ecfi m\u1eaft, nh\u1ee9c \u0111\u1ea7u khi d\u00f9ng \u0111i\u1ec7n tho\u1ea1i, n\u00ean tham kh\u1ea3o \u00fd ki\u1ebfn b\u00e1c s\u0129 chuy\u00ean khoa m\u1eaft.<\/p>\n<p><strong>Xem th\u00eam: <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/may-tinh-bang-choi-game\/\">M\u00e1y T\u00ednh B\u1ea3ng Ch\u01a1i Game \u0110\u00e1ng Mua Nh\u1ea5t 07\/2026: Top G\u1ee3i \u00dd &amp; Kinh Nghi\u1ec7m Ch\u1ecdn<\/a><\/strong><\/p>\n<h2>C\u00e1ch gi\u1ea3m \u1ea3nh h\u01b0\u1edfng c\u1ee7a PWM t\u1edbi m\u1eaft<\/h2>\n<p>N\u1ebfu b\u1ea1n nh\u1ea1y c\u1ea3m v\u1edbi hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y <strong>m\u00e0n h\u00ecnh<\/strong> (m\u1ecfi m\u1eaft, nh\u1ee9c \u0111\u1ea7u khi d\u00f9ng \u0111i\u1ec7n tho\u1ea1i l\u00e2u, nh\u1ea5t l\u00e0 bu\u1ed5i t\u1ed1i), c\u00f3 v\u00e0i c\u00e1ch gi\u00fap gi\u1ea3m \u1ea3nh h\u01b0\u1edfng c\u1ee7a PWM.<\/p>\n<ul>\n<li>Th\u1ee9 nh\u1ea5t, ch\u1ecdn \u0111i\u1ec7n tho\u1ea1i c\u00f3 t\u1ea7n s\u1ed1 PWM cao (th\u01b0\u1eddng ghi trong th\u00f4ng s\u1ed1 nh\u01b0 1920Hz PWM, 2160Hz) ho\u1eb7c c\u00f3 ch\u1ee9ng nh\u1eadn gi\u1ea3m nh\u1ea5p nh\u00e1y \u2013 nhi\u1ec1u h\u00e3ng nay ch\u00fa tr\u1ecdng \u0111i\u1ec1u n\u00e0y.<\/li>\n<li>Th\u1ee9 hai, m\u1ed9t s\u1ed1 m\u00e1y c\u00f3 t\u00f9y ch\u1ecdn DC dimming (ch\u1ed1ng nh\u1ea5p nh\u00e1y) trong c\u00e0i \u0111\u1eb7t m\u00e0n h\u00ecnh \u2013 b\u1eadt l\u00ean c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m kh\u00f3 ch\u1ecbu (\u0111\u1ed5i l\u1ea1i m\u00e0u \u1edf m\u1ee9c s\u00e1ng th\u1ea5p c\u00f3 th\u1ec3 k\u00e9m ch\u00ednh x\u00e1c h\u01a1n).<\/li>\n<li>Th\u1ee9 ba, t\u0103ng \u0111\u1ed9 s\u00e1ng m\u00e0n h\u00ecnh l\u00ean m\u1ed9t ch\u00fat (thay v\u00ec \u0111\u1ec3 qu\u00e1 t\u1ed1i) \u0111\u00f4i khi gi\u00fap gi\u1ea3m hi\u1ec7n t\u01b0\u1ee3ng, v\u00ec PWM th\u01b0\u1eddng r\u00f5 h\u01a1n \u1edf \u0111\u1ed9 s\u00e1ng th\u1ea5p; k\u1ebft h\u1ee3p b\u1eadt ch\u1ebf \u0111\u1ed9 ban \u0111\u00eam\/l\u1ecdc \u00e1nh s\u00e1ng xanh v\u00e0 gi\u1ea3m \u0111\u1ed9 s\u00e1ng ph\u00f2ng.<\/li>\n<li>Th\u1ee9 t\u01b0, ngh\u1ec9 m\u1eaft \u0111\u1ecbnh k\u1ef3 (quy t\u1eafc 20-20-20: c\u1ee9 20 ph\u00fat nh\u00ecn xa 20 gi\u00e2y), tr\u00e1nh d\u00f9ng \u0111i\u1ec7n tho\u1ea1i qu\u00e1 l\u00e2u trong b\u00f3ng t\u1ed1i.<\/li>\n<\/ul>\n<p>N\u1ebfu t\u00ecnh tr\u1ea1ng m\u1ecfi m\u1eaft, nh\u1ee9c \u0111\u1ea7u k\u00e9o d\u00e0i, b\u1ea1n n\u00ean \u0111i kh\u00e1m b\u00e1c s\u0129 chuy\u00ean khoa m\u1eaft \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n. \u0110\u00e2y l\u00e0 th\u00f4ng tin tham kh\u1ea3o v\u1ec1 s\u1ee9c kh\u1ecfe th\u1ecb gi\u00e1c, kh\u00f4ng thay th\u1ebf l\u1eddi khuy\u00ean y t\u1ebf. Hi\u1ec3u c\u00e1ch gi\u1ea3m \u1ea3nh h\u01b0\u1edfng PWM gi\u00fap b\u1ea1n d\u00f9ng \u0111i\u1ec7n tho\u1ea1i tho\u1ea3i m\u00e1i h\u01a1n.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-576538 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-3.jpg\" alt=\"pwm-la-gi-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>L\u00e0m sao bi\u1ebft \u0111i\u1ec7n tho\u1ea1i d\u00f9ng PWM hay DC dimming?<\/h2>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi mu\u1ed1n bi\u1ebft \u0111i\u1ec7n tho\u1ea1i c\u1ee7a m\u00ecnh d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng n\u00e0o.<\/p>\n<ul>\n<li>C\u00e1ch \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 nh\u1eadn bi\u1ebft l\u00e0 xem th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a m\u00e1y: c\u00e1c h\u00e3ng ng\u00e0y c\u00e0ng c\u00f4ng b\u1ed1 t\u1ea7n s\u1ed1 PWM (v\u00ed d\u1ee5 &#8220;1920Hz PWM dimming&#8221;) ho\u1eb7c ghi r\u00f5 c\u00f3 h\u1ed7 tr\u1ee3 DC dimming.<\/li>\n<li>M\u1ed9t m\u1eb9o d\u00e2n gian l\u00e0 th\u1eed qua camera: m\u1edf camera <strong><a href=\"https:\/\/hoanghamobile.com\/dien-thoai-di-dong\">\u0111i\u1ec7n tho\u1ea1i<\/a><\/strong> kh\u00e1c quay m\u00e0n h\u00ecnh m\u00e1y c\u1ea7n ki\u1ec3m tra \u1edf \u0111\u1ed9 s\u00e1ng th\u1ea5p \u2013 n\u1ebfu th\u1ea5y c\u00e1c s\u1ecdc ngang ch\u1ea1y ho\u1eb7c nh\u1ea5p nh\u00e1y tr\u00ean khung h\u00ecnh, \u0111\u00f3 l\u00e0 d\u1ea5u hi\u1ec7u m\u00e0n d\u00f9ng PWM (d\u00f9 m\u1eaft th\u01b0\u1eddng kh\u00f4ng th\u1ea5y).<\/li>\n<li>Ngo\u00e0i ra, n\u1ebfu m\u00e1y c\u00f3 t\u00f9y ch\u1ecdn &#8220;ch\u1ed1ng nh\u1ea5p nh\u00e1y&#8221; ho\u1eb7c &#8220;DC dimming&#8221; trong c\u00e0i \u0111\u1eb7t m\u00e0n h\u00ecnh, t\u1ee9c l\u00e0 m\u00e1y h\u1ed7 tr\u1ee3 chuy\u1ec3n sang ch\u1ebf \u0111\u1ed9 \u00edt nh\u1ea5p nh\u00e1y.<\/li>\n<\/ul>\n<p>Nh\u00ecn chung, m\u00e0n LCD th\u01b0\u1eddng \u00edt g\u00e2y kh\u00f3 ch\u1ecbu v\u1ec1 nh\u1ea5p nh\u00e1y h\u01a1n m\u00e0n OLED gi\u00e1 r\u1ebb t\u1ea7n s\u1ed1 PWM th\u1ea5p. N\u1ebfu b\u1ea1n nh\u1ea1y c\u1ea3m v\u1edbi v\u1ea5n \u0111\u1ec1 n\u00e0y, n\u00ean \u01b0u ti\u00ean m\u00e1y c\u00f3 t\u1ea7n s\u1ed1 PWM cao ho\u1eb7c c\u00f3 DC dimming. Vi\u1ec7c bi\u1ebft m\u00e1y d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0o gi\u00fap b\u1ea1n ch\u1ee7 \u0111\u1ed9ng \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 d\u00f9ng tho\u1ea3i m\u00e1i h\u01a1n. \u0110\u00e2y l\u00e0 th\u00f4ng tin tham kh\u1ea3o, m\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng v\u1eabn kh\u00e1c nhau t\u00f9y t\u1eebng ng\u01b0\u1eddi.<\/p>\n<p><strong>Xem th\u00eam: <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/top-10-man-hinh-may-tinh-tot-nhat-2026-gaming-van-phong-do-hoa\/\">Top 10 m\u00e0n h\u00ecnh m\u00e1y t\u00ednh t\u1ed1t nh\u1ea5t 2026: Gaming, V\u0103n ph\u00f2ng, \u0110\u1ed3 h\u1ecda<\/a><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-576539 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-4.jpg\" alt=\"pwm-la-gi-4\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/08\/pwm-la-gi-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 PWM<\/h2>\n<h3>PWM l\u00e0 g\u00ec?<\/h3>\n<p>L\u00e0 k\u1ef9 thu\u1eadt \u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung \u2013 b\u1eadt\/t\u1eaft ngu\u1ed3n \u0111i\u1ec7n r\u1ea5t nhanh \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u00f4ng su\u1ea5t, d\u00f9ng \u0111\u1ec3 ch\u1ec9nh \u0111\u1ed9 s\u00e1ng m\u00e0n h\u00ecnh.<\/p>\n<h3>PWM d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec tr\u00ean m\u00e0n h\u00ecnh?<\/h3>\n<p>\u0110\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng b\u1eb1ng c\u00e1ch ch\u1edbp t\u1eaft m\u00e0n h\u00ecnh c\u1ef1c nhanh, gi\u1eef m\u00e0u ch\u00ednh x\u00e1c.<\/p>\n<h3>PWM c\u00f3 h\u1ea1i cho m\u1eaft kh\u00f4ng?<\/h3>\n<p>\u1ede t\u1ea7n s\u1ed1 th\u1ea5p c\u00f3 th\u1ec3 g\u00e2y m\u1ecfi m\u1eaft, nh\u1ee9c \u0111\u1ea7u v\u1edbi ng\u01b0\u1eddi nh\u1ea1y c\u1ea3m; t\u1ea7n s\u1ed1 cao th\u00ec \u00edt \u1ea3nh h\u01b0\u1edfng.<\/p>\n<h3>PWM v\u00e0 DC dimming kh\u00e1c nhau th\u1ebf n\u00e0o?<\/h3>\n<p>PWM ch\u1edbp t\u1eaft m\u00e0n \u0111\u1ec3 ch\u1ec9nh s\u00e1ng; DC dimming gi\u1ea3m \u0111i\u1ec7n \u00e1p tr\u1ef1c ti\u1ebfp, \u00edt nh\u1ea5p nh\u00e1y h\u01a1n.<\/p>\n<h3>T\u1ea7n s\u1ed1 PWM bao nhi\u00eau l\u00e0 t\u1ed1t?<\/h3>\n<p>C\u00e0ng cao c\u00e0ng \u00edt \u1ea3nh h\u01b0\u1edfng m\u1eaft; c\u00e1c m\u00e1y m\u1edbi d\u00f9ng 1920Hz, 2160Hz ho\u1eb7c h\u01a1n.<\/p>\n<h3>V\u00ec sao m\u00e0n OLED hay d\u00f9ng PWM?<\/h3>\n<p>V\u00ec PWM gi\u1eef m\u00e0u ch\u00ednh x\u00e1c \u1edf m\u1ee9c s\u00e1ng th\u1ea5p, tr\u00e1nh sai m\u00e0u khi gi\u1ea3m \u0111i\u1ec7n \u00e1p tr\u1ef1c ti\u1ebfp.<\/p>\n<h3>L\u00e0m sao gi\u1ea3m m\u1ecfi m\u1eaft do PWM?<\/h3>\n<p>Ch\u1ecdn m\u00e1y t\u1ea7n s\u1ed1 PWM cao, b\u1eadt DC dimming n\u1ebfu c\u00f3, t\u0103ng \u0111\u1ed9 s\u00e1ng v\u1eeba ph\u1ea3i, ngh\u1ec9 m\u1eaft \u0111\u1ecbnh k\u1ef3.<\/p>\n<h3>PWM c\u00f3 \u1edf m\u00e0n h\u00ecnh LCD kh\u00f4ng?<\/h3>\n<p>C\u00f3; PWM d\u00f9ng cho c\u1ea3 LCD v\u00e0 OLED, nh\u01b0ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c nh\u1eafc nhi\u1ec1u v\u1edbi OLED.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>T\u00f3m l\u1ea1i, PWM l\u00e0 k\u1ef9 thu\u1eadt ch\u1edbp t\u1eaft m\u00e0n h\u00ecnh c\u1ef1c nhanh \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng \u2013 gi\u1eef m\u00e0u ch\u00ednh x\u00e1c nh\u01b0ng \u1edf t\u1ea7n s\u1ed1 th\u1ea5p c\u00f3 th\u1ec3 g\u00e2y m\u1ecfi m\u1eaft v\u1edbi ng\u01b0\u1eddi nh\u1ea1y c\u1ea3m. Hi\u1ec3u v\u1ec1 PWM gi\u00fap b\u1ea1n ch\u1ecdn \u0111i\u1ec7n tho\u1ea1i v\u00e0 d\u00f9ng m\u00e0n h\u00ecnh tho\u1ea3i m\u00e1i h\u01a1n cho m\u1eaft. M\u1eddi b\u1ea1n tham kh\u1ea3o th\u00eam c\u00e1c thu\u1eadt ng\u1eef li\u00ean quan nh\u01b0<strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/oled-la-gi\/\">OLED l\u00e0 g\u00ec<\/a>, <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/nits-la-gi\/\">Nits l\u00e0 g\u00ec<\/a><\/strong> v\u00e0 <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/tam-nen-la-gi\/\"><strong>T\u1ea5m n\u1ec1n l\u00e0 g\u00ec<\/strong><\/a> tr\u00ean chuy\u00ean m\u1ee5c tin t\u1ee9c c\u1ee7a <strong><a href=\"https:\/\/hoanghamobile.com\/\">Ho\u00e0ng H\u00e0 Mobile<\/a><\/strong>.<br \/>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"PWM l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"L\u00e0 k\u1ef9 thu\u1eadt \u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung \u2013 b\u1eadt\/t\u1eaft ngu\u1ed3n \u0111i\u1ec7n r\u1ea5t nhanh \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u00f4ng su\u1ea5t, d\u00f9ng \u0111\u1ec3 ch\u1ec9nh \u0111\u1ed9 s\u00e1ng m\u00e0n h\u00ecnh.\"}},{\"@type\":\"Question\",\"name\":\"PWM d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec tr\u00ean m\u00e0n h\u00ecnh?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"\u0110\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng b\u1eb1ng c\u00e1ch ch\u1edbp t\u1eaft m\u00e0n h\u00ecnh c\u1ef1c nhanh, gi\u1eef m\u00e0u ch\u00ednh x\u00e1c.\"}},{\"@type\":\"Question\",\"name\":\"PWM c\u00f3 h\u1ea1i cho m\u1eaft kh\u00f4ng?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"\u1ede t\u1ea7n s\u1ed1 th\u1ea5p c\u00f3 th\u1ec3 g\u00e2y m\u1ecfi m\u1eaft, nh\u1ee9c \u0111\u1ea7u v\u1edbi ng\u01b0\u1eddi nh\u1ea1y c\u1ea3m; t\u1ea7n s\u1ed1 cao th\u00ec \u00edt \u1ea3nh h\u01b0\u1edfng.\"}},{\"@type\":\"Question\",\"name\":\"PWM v\u00e0 DC dimming kh\u00e1c nhau th\u1ebf n\u00e0o?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"PWM ch\u1edbp t\u1eaft m\u00e0n \u0111\u1ec3 ch\u1ec9nh s\u00e1ng; DC dimming gi\u1ea3m \u0111i\u1ec7n \u00e1p tr\u1ef1c ti\u1ebfp, \u00edt nh\u1ea5p nh\u00e1y h\u01a1n.\"}},{\"@type\":\"Question\",\"name\":\"T\u1ea7n s\u1ed1 PWM bao nhi\u00eau l\u00e0 t\u1ed1t?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"C\u00e0ng cao c\u00e0ng \u00edt \u1ea3nh h\u01b0\u1edfng m\u1eaft; c\u00e1c m\u00e1y m\u1edbi d\u00f9ng 1920Hz, 2160Hz ho\u1eb7c h\u01a1n.\"}},{\"@type\":\"Question\",\"name\":\"V\u00ec sao m\u00e0n OLED hay d\u00f9ng PWM?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"V\u00ec PWM gi\u1eef m\u00e0u ch\u00ednh x\u00e1c \u1edf m\u1ee9c s\u00e1ng th\u1ea5p, tr\u00e1nh sai m\u00e0u khi gi\u1ea3m \u0111i\u1ec7n \u00e1p tr\u1ef1c ti\u1ebfp.\"}}]}<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>PWM (Pulse Width Modulation &#8211; \u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung) l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt \u0111i\u1ec1u ch\u1ec9nh c\u00f4ng su\u1ea5t b\u1eb1ng c\u00e1ch b\u1eadt\/t\u1eaft ngu\u1ed3n \u0111i\u1ec7n r\u1ea5t nhanh theo chu k\u1ef3. Tr\u00ean m\u00e0n h\u00ecnh \u0111i\u1ec7n tho\u1ea1i, PWM \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng: thay v\u00ec gi\u1ea3m \u0111i\u1ec7n \u00e1p, m\u00e0n h\u00ecnh ch\u1edbp t\u1eaft c\u1ef1c nhanh (m\u1eaft th\u01b0\u1eddng kh\u00f4ng [&hellip;]<\/p>\n","protected":false},"author":65,"featured_media":576535,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"pwm l\u00e0 g\u00ec","_yoast_wpseo_title":"PWM l\u00e0 g\u00ec? \u1ea2nh h\u01b0\u1edfng c\u1ee7a PWM m\u00e0n h\u00ecnh t\u1edbi m\u1eaft","_yoast_wpseo_metadesc":"PWM l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u c\u01a1 ch\u1ebf \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng m\u00e0n h\u00ecnh b\u1eb1ng PWM, t\u1ea7n s\u1ed1 nh\u1ea5p nh\u00e1y v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1eaft ng\u01b0\u1eddi d\u00f9ng. Xem chi ti\u1ebft t\u1ea1i Ho\u00e0ng H\u00e0 Mobile.","footnotes":""},"categories":[29235,3910,16],"tags":[],"class_list":["post-576055","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goc-to-mo","category-kham-pha","category-thu-thuat"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>PWM l\u00e0 g\u00ec? \u1ea2nh h\u01b0\u1edfng c\u1ee7a PWM m\u00e0n h\u00ecnh t\u1edbi m\u1eaft<\/title>\n<meta name=\"description\" content=\"PWM l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u c\u01a1 ch\u1ebf \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng m\u00e0n h\u00ecnh b\u1eb1ng PWM, t\u1ea7n s\u1ed1 nh\u1ea5p nh\u00e1y v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1eaft ng\u01b0\u1eddi d\u00f9ng. Xem chi ti\u1ebft t\u1ea1i Ho\u00e0ng H\u00e0 Mobile.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/pwm-la-gi\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PWM l\u00e0 g\u00ec? \u1ea2nh h\u01b0\u1edfng c\u1ee7a PWM m\u00e0n h\u00ecnh t\u1edbi m\u1eaft\" \/>\n<meta property=\"og:description\" content=\"PWM l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u c\u01a1 ch\u1ebf \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng m\u00e0n h\u00ecnh b\u1eb1ng PWM, t\u1ea7n s\u1ed1 nh\u1ea5p nh\u00e1y v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1eaft ng\u01b0\u1eddi d\u00f9ng. 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