{"id":2932,"date":"2019-05-01T19:26:39","date_gmt":"2019-05-01T19:26:39","guid":{"rendered":"https:\/\/pageloot.com\/?p=2932"},"modified":"2026-04-29T08:03:59","modified_gmt":"2026-04-29T08:03:59","slug":"why-qr-code-not-working","status":"publish","type":"post","link":"https:\/\/pageloot.com\/vi\/qr-code-marketing\/why-qr-code-not-working\/","title":{"rendered":"T\u1ea1i sao m\u00e3 QR c\u1ee7a t\u00f4i kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng? C\u00e1c c\u00e1ch kh\u1eafc ph\u1ee5c ph\u1ed5 bi\u1ebfn cho l\u1ed7i qu\u00e9t"},"content":{"rendered":"

M\u00e3 QR c\u1ee7a b\u1ea1n kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c ho\u1eb7c d\u1eabn ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn sai trang? M\u1ed9t m\u00e3 kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng s\u1ebd t\u1ea1o ra tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng k\u00e9m v\u00e0 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ea5t t\u01b0\u01a1ng t\u00e1c. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u00fap b\u1ea1n ch\u1ea9n \u0111o\u00e1n c\u00e1c l\u1ed7i k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn v\u00e0 cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p thi\u1ebft th\u1ef1c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e3 c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady m\u1ecdi l\u00fac.<\/p>\n\n\n\n

T\u1ea1i sao K\u00edch th\u01b0\u1edbc v\u00e0 Kho\u1ea3ng c\u00e1ch Quy\u1ebft \u0111\u1ecbnh Kh\u1ea3 n\u0103ng Qu\u00e9t<\/h2>\n\n\n\n

K\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u1ee7a m\u00e3 QR l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 khi qu\u00e9t. N\u1ebfu m\u00e3 qu\u00e1 nh\u1ecf, camera \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c m\u00f4-\u0111un ri\u00eang l\u1ebb trong m\u1eabu. C\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh khuy\u1ebfn ngh\u1ecb k\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u l\u00e0 0,8 x 0,8 inch (2 x 2 cm) cho c\u00e1c t\u00e0i li\u1ec7u t\u1ea7m g\u1ea7n nh\u01b0 danh thi\u1ebfp ho\u1eb7c bao b\u00ec s\u1ea3n ph\u1ea9m. \u0110\u1ed1i v\u1edbi c\u00e1c m\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 qu\u00e9t t\u1eeb xa, b\u1ea1n n\u00ean tu\u00e2n th\u1ee7 quy t\u1eafc kho\u1ea3ng c\u00e1ch-k\u00edch th\u01b0\u1edbc 10:1, ngh\u0129a l\u00e0 m\u1ed9t m\u00e3 \u0111\u01b0\u1ee3c nh\u00ecn t\u1eeb kho\u1ea3ng c\u00e1ch 10 feet ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t 1 foot.<\/p>\n\n\n\n

Khi l\u1eadp k\u1ebf ho\u1ea1ch b\u1ed1 c\u1ee5c, h\u00e3y nh\u1edb r\u1eb1ng d\u1eef li\u1ec7u d\u00e0y \u0111\u1eb7c h\u01a1n y\u00eau c\u1ea7u nhi\u1ec1u m\u00f4-\u0111un h\u01a1n, \u0111i\u1ec1u n\u00e0y \u0111\u00f2i h\u1ecfi m\u1ed9t di\u1ec7n t\u00edch v\u1eadt l\u00fd l\u1edbn h\u01a1n \u0111\u1ec3 gi\u1eef \u0111\u01b0\u1ee3c t\u00ednh d\u1ec5 \u0111\u1ecdc. Tu\u00e2n th\u1ee7 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t \u0111\u1ec3 \u0111\u1ecdc m\u00e3 QR<\/a> \u0111\u1ea3m b\u1ea3o r\u1eb1ng thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n t\u00ednh \u0111\u1ebfn c\u00e1c t\u1ef7 l\u1ec7 n\u00e0y tr\u01b0\u1edbc khi b\u1ea1n th\u1ef1c hi\u1ec7n m\u1ed9t \u0111\u1ee3t in l\u1edbn. N\u1ebfu b\u1ea1n kh\u00f4ng ch\u1eafc ch\u1eafn v\u1ec1 v\u1ecb tr\u00ed cu\u1ed1i c\u00f9ng, lu\u00f4n an to\u00e0n h\u01a1n khi ch\u1ecdn m\u00e3 l\u1edbn h\u01a1n \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng c\u0169 h\u01a1n c\u00f3 camera \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p h\u01a1n.<\/p>\n\n\n\n

T\u1ea1i sao \u0110\u1ed9 T\u01b0\u01a1ng ph\u1ea3n M\u00e0u s\u1eafc l\u00e0 N\u1ec1n t\u1ea3ng c\u1ee7a Kh\u1ea3 n\u0103ng \u0110\u1ecdc<\/h2>\n\n\n\n

M\u00e1y qu\u00e9t d\u1ef1a v\u00e0o s\u1ef1 ph\u00e2n bi\u1ec7t gi\u1eefa c\u00e1c m\u00f4-\u0111un t\u1ed1i v\u00e0 s\u00e1ng \u0111\u1ec3 gi\u1ea3i m\u00e3 th\u00f4ng tin. N\u1ebfu \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n qu\u00e1 th\u1ea5p, ph\u1ea7n m\u1ec1m c\u00f3 th\u1ec3 kh\u00f4ng nh\u1eadn ra m\u1eabu so v\u1edbi n\u1ec1n. M\u1eb7c d\u00f9 m\u00e0u s\u1eafc th\u01b0\u01a1ng hi\u1ec7u c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n s\u1ef1 t\u01b0\u01a1ng t\u00e1c, b\u1ea1n ph\u1ea3i duy tr\u00ec t\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n cao \u2013 l\u00fd t\u01b0\u1edfng l\u00e0 4,5:1 tr\u1edf l\u00ean \u2013 \u0111\u1ec3 tu\u00e2n th\u1ee7 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e0u s\u1eafc<\/a>. C\u00e1c thi\u1ebft k\u1ebf \u0111en tr\u00ean n\u1ec1n tr\u1eafng truy\u1ec1n th\u1ed1ng mang l\u1ea1i \u0111\u1ed9 tin c\u1eady cao nh\u1ea5t, nh\u01b0ng m\u00e0u xanh h\u1ea3i qu\u00e2n \u0111\u1eadm, t\u00edm \u0111\u1eadm ho\u1eb7c xanh l\u00e1 c\u00e2y r\u1eebng tr\u00ean n\u1ec1n x\u00e1m nh\u1ea1t ho\u1eb7c kem c\u0169ng hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n

Tr\u00e1nh s\u1eed d\u1ee5ng m\u00e0u \u0111\u1ea3o ng\u01b0\u1ee3c, v\u00ec nhi\u1ec1u \u1ee9ng d\u1ee5ng camera g\u1ed1c g\u1eb7p kh\u00f3 kh\u0103n khi \u0111\u1ecdc m\u00e3 m\u00e0u s\u00e1ng tr\u00ean n\u1ec1n t\u1ed1i. T\u01b0\u01a1ng t\u1ef1, tr\u00e1nh xa c\u00e1c gradient ho\u1eb7c n\u1ec1n trong m\u1edd c\u00f3 th\u1ec3 t\u1ea1o ra \u00e1nh s\u00e1ng kh\u00f4ng \u0111\u1ec1u ho\u1eb7c t\u00f4ng m\u00e0u trung b\u00ecnh. H\u00e3y ngh\u0129 v\u1ec1 m\u00e1y qu\u00e9t nh\u01b0 m\u1ed9t thi\u1ebft b\u1ecb \u0111\u1ecdc t\u1ed1c \u0111\u1ed9 cao c\u1ea7n s\u1ef1 ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng, s\u1eafc n\u00e9t gi\u1eefa \u201cm\u1ef1c\u201d v\u00e0 \u201cgi\u1ea5y\u201d \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u ch\u00ednh x\u00e1c.<\/p>\n\n\n\n

T\u1ea7m quan tr\u1ecdng c\u1ee7a V\u00f9ng y\u00ean t\u0129nh v\u00e0 Kho\u1ea3ng \u0111\u1ec7m<\/h2>\n\n\n\n

\u201cV\u00f9ng y\u00ean t\u0129nh\u201d l\u00e0 kho\u1ea3ng tr\u1ed1ng bao quanh b\u1ed1n c\u1ea1nh c\u1ee7a m\u00e3 QR. Kh\u00f4ng gian n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00ec n\u00f3 cho m\u00e1y qu\u00e9t bi\u1ebft m\u00e3 b\u1eaft \u0111\u1ea7u \u1edf \u0111\u00e2u v\u00e0 thi\u1ebft k\u1ebf xung quanh k\u1ebft th\u00fac \u1edf \u0111\u00e2u. Theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf, kho\u1ea3ng tr\u1ed1ng n\u00e0y ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t b\u1ed1n m\u00f4-\u0111un. N\u1ebfu v\u0103n b\u1ea3n, logo ho\u1eb7c c\u00e1c m\u1eabu n\u1ec1n l\u1ea5n v\u00e0o kh\u00f4ng gian n\u00e0y, m\u00e1y qu\u00e9t c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p c\u00e1c y\u1ebfu t\u1ed1 \u0111\u00f3 v\u00e0o ch\u00ednh m\u00e3, d\u1eabn \u0111\u1ebfn qu\u00e9t kh\u00f4ng th\u00e0nh c\u00f4ng.<\/p>\n\n\n\n

Duy tr\u00ec \u0111\u01b0\u1eddng vi\u1ec1n kh\u00f4ng b\u1ecb c\u1ea3n tr\u1edf n\u00e0y l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t m\u1eb9o \u0111\u1ec3 qu\u00e9t nhanh h\u01a1n<\/a>. Ngay c\u1ea3 khi thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n \u0111\u00f4ng \u0111\u00fac, vi\u1ec7c gi\u1eef l\u1ea1i kho\u1ea3ng tr\u1eafng n\u00e0y quan tr\u1ecdng h\u01a1n t\u00ednh th\u1ea9m m\u1ef9 c\u1ee7a m\u1ed9t b\u1ed1 c\u1ee5c ch\u1eadt h\u1eb9p. N\u1ebfu kh\u00f4ng c\u00f3 v\u00f9ng y\u00ean t\u0129nh r\u00f5 r\u00e0ng, m\u00e1y qu\u00e9t c\u00f3 th\u1ec3 coi m\u00e3 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a \u0111\u1ed3 h\u1ecda l\u1edbn h\u01a1n thay v\u00ec m\u1ed9t c\u00f4ng c\u1ee5 ch\u1ee9c n\u0103ng.<\/p>\n\n\n\n

Qu\u1ea3n l\u00fd \u0110\u1ed9 ph\u1ee9c t\u1ea1p D\u1eef li\u1ec7u b\u1eb1ng M\u00e3 QR \u0110\u1ed9ng<\/h2>\n\n\n\n

M\u1ed9t m\u00e3 QR ch\u1ee9a qu\u00e1 nhi\u1ec1u th\u00f4ng tin \u2013 ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ed9t URL d\u00e0i v\u1edbi nhi\u1ec1u tham s\u1ed1 theo d\u00f5i \u2013 s\u1ebd tr\u00f4ng c\u1ef1c k\u1ef3 d\u00e0y \u0111\u1eb7c v\u00e0 b\u1ecb pixel h\u00f3a. S\u1ef1 ph\u1ee9c t\u1ea1p n\u00e0y khi\u1ebfn camera kh\u00f3 l\u1ea5y n\u00e9t v\u00e0 gi\u1ea3i m\u00e3 c\u00e1c kh\u1ed1i nh\u1ecf h\u01a1n. \u0110\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t tr\u00ecnh t\u1ea1o m\u00e3 QR<\/a> \u0111\u1ec3 t\u1ea1o m\u00e3 \u0111\u1ed9ng. C\u00e1c m\u00e3 n\u00e0y l\u01b0u tr\u1eef m\u1ed9t URL chuy\u1ec3n h\u01b0\u1edbng ng\u1eafn, \u0111\u01a1n gi\u1ea3n h\u00f3a thay v\u00ec \u0111\u1ecba ch\u1ec9 \u0111\u00edch \u0111\u1ea7y \u0111\u1ee7, t\u1ea1o ra m\u1ed9t m\u1eabu s\u1ea1ch h\u01a1n, \u00edt l\u1ed9n x\u1ed9n h\u01a1n v\u00e0 qu\u00e9t nhanh h\u01a1n \u0111\u00e1ng k\u1ec3.<\/p>\n\n\n\n

M\u00e3 \u0111\u1ed9ng mang l\u1ea1i l\u1ee3i \u00edch b\u1ed5 sung v\u1ec1 t\u00ednh linh ho\u1ea1t. N\u1ebfu li\u00ean k\u1ebft \u0111\u00edch c\u1ee7a b\u1ea1n b\u1ecb h\u1ecfng ho\u1eb7c thay \u0111\u1ed5i, b\u1ea1n c\u00f3 th\u1ec3 c\u1eadp nh\u1eadt URL \u1edf ph\u1ea7n ph\u1ee5 tr\u1ee3 m\u00e0 kh\u00f4ng c\u1ea7n in l\u1ea1i t\u00e0i li\u1ec7u c\u1ee7a m\u00ecnh. \u0110i\u1ec1u n\u00e0y ng\u0103n ch\u1eb7n v\u1ea5n \u0111\u1ec1 \u201cli\u00ean k\u1ebft h\u1ecfng\u201d th\u01b0\u1eddng x\u1ea3y ra v\u1edbi m\u00e3 t\u0129nh, n\u01a1i m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh khuy\u1ebfn m\u00e3i \u0111\u00e3 h\u1ebft h\u1ea1n ho\u1eb7c m\u1ed9t trang \u0111\u00edch \u0111\u00e3 b\u1ecb x\u00f3a khi\u1ebfn m\u00e3 \u0111\u00e3 in tr\u1edf n\u00ean v\u00f4 d\u1ee5ng.<\/p>\n\n\n\n

\n

Theo d\u00f5i chi\u1ebfn d\u1ecbch c\u1ee7a b\u1ea1n trong th\u1eddi gian th\u1ef1c<\/strong> B\u1ea1n mu\u1ed1n bi\u1ebft ch\u00ednh x\u00e1c kh\u00e1ch h\u00e0ng c\u1ee7a m\u00ecnh \u0111ang qu\u00e9t t\u00e0i li\u1ec7u c\u1ee7a b\u1ea1n \u1edf \u0111\u00e2u v\u00e0 khi n\u00e0o? H\u00e3y s\u1eed d\u1ee5ng tr\u00ecnh t\u1ea1o m\u00e3 QR<\/a> \u0111\u1ec3 t\u1ea1o m\u00e3 c\u00f3 th\u1ec3 theo d\u00f5i v\u00e0 truy c\u1eadp b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n hi\u1ec7u su\u1ea5t \u0111\u1ea7y \u0111\u1ee7 ngay h\u00f4m nay.<\/p>\n<\/blockquote>\n\n\n\n

Ch\u1ea5t l\u01b0\u1ee3ng in v\u00e0 v\u1eadt li\u1ec7u n\u1ec1n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n\n\n\n

V\u1eadt li\u1ec7u m\u00e0 m\u00e3 c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c in l\u00ean c\u00f3 th\u1ec3 quan tr\u1ecdng nh\u01b0 ch\u00ednh thi\u1ebft k\u1ebf. H\u00ecnh \u1ea3nh \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft; b\u1ea1n n\u00ean lu\u00f4n s\u1eed d\u1ee5ng c\u00e1c \u0111\u1ecbnh d\u1ea1ng vector nh\u01b0 SVG ho\u1eb7c EPS \u0111\u1ec3 in nh\u1eb1m ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng v\u1ee1 \u0111i\u1ec3m \u1ea3nh. Khi m\u1ed9t m\u00e3 b\u1ecb m\u1edd ho\u1eb7c nh\u00f2e, c\u00e1c c\u1ea1nh c\u1ee7a c\u00e1c m\u00f4-\u0111un s\u1ebd h\u00f2a v\u00e0o nhau, g\u00e2y nh\u1ea7m l\u1eabn cho ph\u1ea7n m\u1ec1m qu\u00e9t. Tham kh\u1ea3o t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c k\u1ef9 thu\u1eadt in<\/a> c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p ph\u00f9 h\u1ee3p, ch\u1eb3ng h\u1ea1n nh\u01b0 in offset ho\u1eb7c in k\u1ef9 thu\u1eadt s\u1ed1, \u0111\u1ec3 duy tr\u00ec c\u00e1c c\u1ea1nh s\u1eafc n\u00e9t.<\/p>\n\n\n\n

\"So<\/figure>\n\n\n\n

C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng nh\u01b0 \u00e1nh s\u00e1ng ch\u00f3i c\u0169ng \u0111\u00f3ng m\u1ed9t vai tr\u00f2. Gi\u1ea5y b\u00f3ng, k\u00ednh ho\u1eb7c bao b\u00ec nh\u1ef1a c\u00f3 th\u1ec3 ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng tr\u1ef1c ti\u1ebfp v\u00e0o \u1ed1ng k\u00ednh m\u00e1y \u1ea3nh, l\u00e0m m\u1edd c\u00e1c chi ti\u1ebft c\u1ee7a m\u00e3. S\u1eed d\u1ee5ng l\u1edbp ho\u00e0n thi\u1ec7n m\u1edd ho\u1eb7c \u0111\u1eb7t m\u00e3 tr\u00ean m\u1ed9t b\u1ec1 m\u1eb7t ph\u1eb3ng \u2013 thay v\u00ec m\u1ed9t chai cong ho\u1eb7c m\u1ed9t c\u1ea1nh g\u1ea5p \u2013 s\u1ebd c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 t\u1ed1c \u0111\u1ed9 qu\u00e9t. N\u1ebfu m\u00e3 c\u1ee7a b\u1ea1n ph\u1ea3i n\u1eb1m tr\u00ean m\u1ed9t b\u1ec1 m\u1eb7t cong, vi\u1ec7c t\u0103ng k\u00edch th\u01b0\u1edbc c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m thi\u1ec3u s\u1ef1 bi\u1ebfn d\u1ea1ng do u\u1ed1n cong.<\/p>\n\n\n\n

Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 thi\u1ebft b\u1ecb v\u00e0 m\u00f4i tr\u01b0\u1eddng<\/h2>\n\n\n\n

\u0110\u00f4i khi v\u1ea5n \u0111\u1ec1 kh\u00f4ng ph\u1ea3i l\u00e0 m\u00e3, m\u00e0 l\u00e0 m\u00f4i tr\u01b0\u1eddng ho\u1eb7c thi\u1ebft b\u1ecb \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. \u0110i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng y\u1ebfu c\u00f3 th\u1ec3 khi\u1ebfn c\u1ea3m bi\u1ebfn kh\u00f3 nh\u1eadn bi\u1ebft \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n, trong khi \u1ed1ng k\u00ednh m\u00e1y \u1ea3nh b\u1ea9n l\u00e0 m\u1ed9t nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u01b0ng th\u01b0\u1eddng b\u1ecb b\u1ecf qua g\u00e2y ra h\u00ecnh \u1ea3nh m\u1edd. \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i ki\u1ec3m tra m\u00e3 QR v\u1ec1 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng tr\u00ean thi\u1ebft b\u1ecb di \u0111\u1ed9ng<\/a> tr\u00ean c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c nhau, bao g\u1ed3m c\u1ea3 c\u00e1c m\u1eabu Android v\u00e0 iOS c\u0169 h\u01a1n, \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng ti\u1ebfp c\u1eadn r\u1ed9ng r\u00e3i.<\/p>\n\n\n\n

N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng c\u00e1c y\u1ebfu t\u1ed1 th\u01b0\u01a1ng hi\u1ec7u, ch\u1eb3ng h\u1ea1n nh\u01b0 logo \u1edf gi\u1eefa m\u00e3, b\u1ea1n ph\u1ea3i t\u0103ng m\u1ee9c \u0111\u1ed9 s\u1eeda l\u1ed7i l\u00ean Q ho\u1eb7c H. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p m\u00e3 v\u1eabn ho\u1ea1t \u0111\u1ed9ng ngay c\u1ea3 khi t\u1edbi 30% m\u1eabu b\u1ecb che khu\u1ea5t. Vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng m\u00e3 QR<\/a> bao g\u1ed3m vi\u1ec7c th\u1eed nghi\u1ec7m c\u00e1c thi\u1ebft k\u1ebf c\u00f3 th\u01b0\u01a1ng hi\u1ec7u n\u00e0y trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng th\u1ef1c t\u1ebf \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c \u0111\u1ed3 h\u1ecda b\u1ed5 sung kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 qu\u00e9t c\u01a1 b\u1ea3n.<\/p>\n\n\n\n

\u0110\u1ea3m b\u1ea3o m\u00e3 QR c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng y\u00eau c\u1ea7u s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p, \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n cao v\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 \u0111\u1ed9ng \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3. B\u1eb1ng c\u00e1ch th\u1eed nghi\u1ec7m m\u00e3 c\u1ee7a b\u1ea1n tr\u00ean nhi\u1ec1u thi\u1ebft b\u1ecb v\u00e0 ch\u1ecdn v\u1eadt li\u1ec7u in ch\u1ea5t l\u01b0\u1ee3ng cao, b\u1ea1n c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf c\u00e1c r\u00e0o c\u1ea3n k\u1ef9 thu\u1eadt ng\u0103n c\u1ea3n kh\u00e1ch h\u00e0ng t\u01b0\u01a1ng t\u00e1c v\u1edbi th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n

\"Infographic<\/figure>\n\n\n\n

C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n
T\u1ea1i sao m\u00e3 QR c\u1ee7a t\u00f4i b\u1ecb m\u1edd khi t\u00f4i in?<\/strong>

\u0110\u1ed9 m\u1edd th\u01b0\u1eddng x\u1ea3y ra khi b\u1ea1n s\u1eed d\u1ee5ng \u0111\u1ecbnh d\u1ea1ng t\u1ec7p c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p nh\u01b0 JPG ho\u1eb7c PNG k\u00edch th\u01b0\u1edbc nh\u1ecf. \u0110\u1ec3 gi\u1eef c\u00e1c c\u1ea1nh s\u1eafc n\u00e9t, h\u00e3y lu\u00f4n t\u1ea3i xu\u1ed1ng m\u00e3 c\u1ee7a b\u1ea1n \u1edf \u0111\u1ecbnh d\u1ea1ng vector nh\u01b0 SVG, PDF ho\u1eb7c EPS, cho ph\u00e9p thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng.<\/p> <\/div>

T\u00f4i c\u00f3 th\u1ec3 thay \u0111\u1ed5i li\u00ean k\u1ebft trong m\u00e3 QR c\u1ee7a m\u00ecnh sau khi in kh\u00f4ng?<\/strong>

B\u1ea1n ch\u1ec9 c\u00f3 th\u1ec3 thay \u0111\u1ed5i li\u00ean k\u1ebft n\u1ebfu b\u1ea1n \u0111\u00e3 s\u1eed d\u1ee5ng m\u00e3 QR \u0111\u1ed9ng. M\u00e3 QR t\u0129nh c\u00f3 d\u1eef li\u1ec7u \u0111\u00edch \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a c\u1ee9ng v\u00e0o m\u1eabu, trong khi m\u00e3 \u0111\u1ed9ng cho ph\u00e9p b\u1ea1n c\u1eadp nh\u1eadt URL chuy\u1ec3n h\u01b0\u1edbng th\u00f4ng qua b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n qu\u1ea3n l\u00fd c\u1ee7a b\u1ea1n b\u1ea5t c\u1ee9 l\u00fac n\u00e0o.<\/p> <\/div>

T\u1ea1i sao camera iPhone ho\u1eb7c Android c\u1ee7a t\u00f4i kh\u00f4ng nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c m\u00e3?<\/strong>

\u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng do \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n th\u1ea5p ho\u1eb7c thi\u1ebfu v\u00f9ng y\u00ean t\u0129nh. \u0110\u1ea3m b\u1ea3o c\u00f3 m\u1ed9t \u0111\u01b0\u1eddng vi\u1ec1n r\u00f5 r\u00e0ng xung quanh m\u00e3 v\u00e0 m\u00e0u s\u1eafc c\u1ee7a c\u00e1c m\u00f4-\u0111un t\u1ed1i h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi n\u1ec1n. B\u1ea1n c\u0169ng n\u00ean ki\u1ec3m tra xem m\u00e3 c\u00f3 qu\u00e1 nh\u1ecf \u0111\u1ec3 m\u00e1y \u1ea3nh c\u00f3 th\u1ec3 l\u1ea5y n\u00e9t \u1edf kho\u1ea3ng c\u00e1ch \u0111\u00f3 kh\u00f4ng.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"

Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u00e3 QR b\u1ecb l\u1ed7i v\u00e0 t\u00ecm hi\u1ec3u c\u00e1ch kh\u1eafc ph\u1ee5c c\u00e1c v\u1ea5n \u0111\u1ec1 qu\u00e9t. T\u1ed1i \u01b0u h\u00f3a k\u00edch th\u01b0\u1edbc, \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n v\u00e0 v\u00f9ng y\u00ean t\u0129nh ho\u1eb7c s\u1eed d\u1ee5ng m\u00e3 \u0111\u1ed9ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o qu\u00e9t \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"author":17,"featured_media":53174,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-2932","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-qr-code-marketing"],"yoast_head":"\nWhy Is My QR Code Not Working? Common Fixes for Scan Failures<\/title>\n<meta name=\"description\" content=\"Troubleshoot QR code failures and learn how to fix scanning issues. 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Optimize size, contrast, and quiet zones or use dynamic codes to ensure reliable scans.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pageloot.com\/vi\/qr-code-marketing\/why-qr-code-not-working\/\" \/>\n<meta property=\"og:site_name\" content=\"Pageloot\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/pageloot\/\" \/>\n<meta property=\"article:published_time\" content=\"2019-05-01T19:26:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-29T08:03:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/04\/modern-indoor-scanning-103100-b51fa00a1ae4.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Siim T\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@getpageloot\" \/>\n<meta name=\"twitter:site\" content=\"@getpageloot\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Siim T\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/pageloot.com\\\/qr-code-marketing\\\/why-qr-code-not-working\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/qr-code-marketing\\\/why-qr-code-not-working\\\/\"},\"author\":{\"name\":\"Siim T\",\"@id\":\"https:\\\/\\\/pageloot.com\\\/es\\\/#\\\/schema\\\/person\\\/fa28992c2e52546f0812833bac852dfe\"},\"headline\":\"Why Is My QR Code Not Working? 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