{"id":2102,"date":"2019-04-21T17:02:10","date_gmt":"2019-04-21T17:02:10","guid":{"rendered":"https:\/\/pageloot.com\/?p=2102"},"modified":"2026-04-29T08:02:59","modified_gmt":"2026-04-29T08:02:59","slug":"understand-qr-code-data-limits","status":"publish","type":"post","link":"https:\/\/pageloot.com\/vi\/how-to\/understand-qr-code-data-limits\/","title":{"rendered":"Gi\u1ea3i th\u00edch gi\u1edbi h\u1ea1n dung l\u01b0\u1ee3ng d\u1eef li\u1ec7u c\u1ee7a m\u00e3 QR"},"content":{"rendered":"

B\u1ea1n \u0111\u00e3 bao gi\u1edd t\u1ef1 h\u1ecfi t\u1ea1i sao m\u1ed9t s\u1ed1 m\u00e3 QR tr\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c l\u01b0\u1edbi \u0111\u01a1n gi\u1ea3n trong khi nh\u1eefng m\u00e3 kh\u00e1c l\u1ea1i l\u00e0 c\u00e1c m\u1eabu d\u00e0y \u0111\u1eb7c g\u1ed3m c\u00e1c ch\u1ea5m nh\u1ecf ch\u01b0a? S\u1ef1 ph\u1ee9c t\u1ea1p n\u00e0y \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 d\u1ec5 d\u00e0ng kh\u00e1ch h\u00e0ng c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 qu\u00e9t m\u00e3 v\u00e0 l\u01b0\u1ee3ng th\u00f4ng tin b\u1ea1n c\u00f3 th\u1ec3 chia s\u1ebb. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a gi\u1edbi h\u1ea1n d\u1eef li\u1ec7u v\u00e0 c\u00e1ch ch\u1ecdn c\u1ea5u h\u00ecnh ph\u00f9 h\u1ee3p cho nhu c\u1ea7u kinh doanh c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n

C\u00e1c phi\u00ean b\u1ea3n m\u00e3 QR x\u00e1c \u0111\u1ecbnh gi\u1edbi h\u1ea1n d\u1eef li\u1ec7u nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n\n\n\n

M\u00e3 QR \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac th\u00e0nh c\u00e1c \u201cphi\u00ean b\u1ea3n\u201d x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd v\u00e0 dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef ti\u1ec1m n\u0103ng c\u1ee7a ch\u00fang. C\u00f3 40 phi\u00ean b\u1ea3n ti\u00eau chu\u1ea9n, b\u1eaft \u0111\u1ea7u t\u1eeb Phi\u00ean b\u1ea3n 1, bao g\u1ed3m m\u1ed9t l\u01b0\u1edbi m\u00f4-\u0111un 21\u00d721. Khi s\u1ed1 phi\u00ean b\u1ea3n t\u0103ng l\u00ean, l\u01b0\u1edbi s\u1ebd m\u1edf r\u1ed9ng th\u00eam b\u1ed1n m\u00f4-\u0111un \u1edf m\u1ed7i b\u00ean, cu\u1ed1i c\u00f9ng \u0111\u1ea1t \u0111\u1ebfn Phi\u00ean b\u1ea3n 40 v\u1edbi b\u1ed1 c\u1ee5c m\u00f4-\u0111un kh\u1ed5ng l\u1ed3 177\u00d7177.<\/p>\n\n\n\n

M\u1ed7i m\u00f4-\u0111un b\u1ed5 sung th\u00eam \u201ckh\u00f4ng gian\u201d \u0111\u1ec3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, nh\u01b0ng \u0111i\u1ec1u n\u00e0y c\u0169ng l\u00e0m cho m\u00e3 tr\u00f4ng d\u00e0y \u0111\u1eb7c v\u00e0 ph\u1ee9c t\u1ea1p h\u01a1n v\u1ec1 m\u1eb7t h\u00ecnh \u1ea3nh. Khi b\u1ea1n m\u00e3 h\u00f3a d\u1eef li\u1ec7u b\u1eb1ng m\u1ed9t tr\u00ecnh t\u1ea1o m\u00e3 QR li\u00ean k\u1ebft<\/a>, c\u00f4ng c\u1ee5 ph\u1ea3i ch\u1ecdn m\u1ed9t phi\u00ean b\u1ea3n \u0111\u1ee7 l\u1edbn \u0111\u1ec3 ch\u1ee9a s\u1ed1 l\u01b0\u1ee3ng k\u00fd t\u1ef1 c\u1ee7a b\u1ea1n. M\u1eb7c d\u00f9 c\u00e1c phi\u00ean b\u1ea3n cao h\u01a1n c\u00f3 th\u1ec3 ch\u1ee9a h\u00e0ng ngh\u00ecn k\u00fd t\u1ef1, nh\u01b0ng ch\u00fang y\u00eau c\u1ea7u \u0111\u1ed9 ph\u00e2n gi\u1ea3i in cao h\u01a1n nhi\u1ec1u v\u00e0 k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd l\u1edbn h\u01a1n \u0111\u1ec3 v\u1eabn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c qu\u00e9t b\u1eb1ng camera \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh ti\u00eau chu\u1ea9n.<\/p>\n\n\n\n

\n\n\n\n\n\n\n\n\n
Phi\u00ean b\u1ea3n<\/th>\nM\u00f4-\u0111un l\u01b0\u1edbi<\/th>\nDung l\u01b0\u1ee3ng s\u1ed1<\/th>\nDung l\u01b0\u1ee3ng ch\u1eef v\u00e0 s\u1ed1<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\n21\u00d721<\/td>\n41 k\u00fd t\u1ef1<\/td>\n25 k\u00fd t\u1ef1<\/td>\n<\/tr>\n
10<\/td>\n57\u00d757<\/td>\n531 k\u00fd t\u1ef1<\/td>\n318 k\u00fd t\u1ef1<\/td>\n<\/tr>\n
20<\/td>\n97\u00d797<\/td>\n1.461 k\u00fd t\u1ef1<\/td>\n894 k\u00fd t\u1ef1<\/td>\n<\/tr>\n
40<\/td>\n177\u00d7177<\/td>\n7.089 k\u00fd t\u1ef1<\/td>\n4.296 k\u00fd t\u1ef1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n\n

S\u1ef1 \u0111\u00e1nh \u0111\u1ed5i gi\u1eefa s\u1eeda l\u1ed7i v\u00e0 kh\u00f4ng gian d\u1eef li\u1ec7u<\/h2>\n\n\n\n

S\u1eeda l\u1ed7i l\u00e0 m\u1ed9t t\u00ednh n\u0103ng t\u00edch h\u1ee3p cho ph\u00e9p m\u00e3 QR v\u1eabn ho\u1ea1t \u0111\u1ed9ng ngay c\u1ea3 khi b\u1ecb tr\u1ea7y x\u01b0\u1edbc, b\u1ea9n ho\u1eb7c b\u1ecb che khu\u1ea5t m\u1ed9t ph\u1ea7n. Kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i n\u00e0y \u0111\u1ea1t \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng thu\u1eadt to\u00e1n Reed\u2013Solomon, thu\u1eadt to\u00e1n n\u00e0y th\u00eam d\u1eef li\u1ec7u d\u1ef1 ph\u00f2ng v\u00e0o m\u00e3. Tuy nhi\u00ean, v\u00ec d\u1eef li\u1ec7u d\u1ef1 ph\u00f2ng n\u00e0y s\u1eed d\u1ee5ng c\u00f9ng c\u00e1c m\u00f4-\u0111un v\u1edbi t\u1ea3i tr\u1ecdng c\u1ee7a b\u1ea1n, vi\u1ec7c ch\u1ecdn m\u1ee9c b\u1ea3o v\u1ec7 cao h\u01a1n s\u1ebd l\u00e0m gi\u1ea3m t\u1ed5ng dung l\u01b0\u1ee3ng c\u00f3 s\u1eb5n cho d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n

\"Bi\u1ec3u<\/figure>\n\n\n\n

Hi\u1ec3u r\u00f5 c\u00e1ch s\u1eeda l\u1ed7i ho\u1ea1t \u0111\u1ed9ng trong m\u00e3 QR c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda<\/a> gi\u00fap b\u1ea1n ch\u1ecdn s\u1ef1 c\u00e2n b\u1eb1ng ph\u00f9 h\u1ee3p cho m\u00f4i tr\u01b0\u1eddng c\u1ee7a m\u00ecnh. C\u00f3 b\u1ed1n c\u1ea5p \u0111\u1ed9 ti\u00eau chu\u1ea9n: C\u1ea5p \u0111\u1ed9 L (Th\u1ea5p) kh\u00f4i ph\u1ee5c kho\u1ea3ng 7% d\u1eef li\u1ec7u v\u00e0 cung c\u1ea5p dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef cao nh\u1ea5t, trong khi C\u1ea5p \u0111\u1ed9 M (Trung b\u00ecnh) kh\u00f4i ph\u1ee5c 15% v\u00e0 l\u00e0 ti\u00eau chu\u1ea9n cho h\u1ea7u h\u1ebft c\u00e1c t\u00e0i li\u1ec7u ti\u1ebfp th\u1ecb. C\u1ea5p \u0111\u1ed9 Q (Quartile) kh\u00f4i ph\u1ee5c 25% v\u00e0 t\u1ed1t h\u01a1n cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng c\u00f4ng nghi\u1ec7p, v\u00e0 C\u1ea5p \u0111\u1ed9 H (Cao) kh\u00f4i ph\u1ee5c t\u1edbi 30%, \u0111i\u1ec1u n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft n\u1ebfu b\u1ea1n \u0111\u1ecbnh t\u00f9y ch\u1ec9nh m\u00e3 b\u1eb1ng logo th\u01b0\u01a1ng hi\u1ec7u ho\u1eb7c d\u1ef1 ki\u1ebfn m\u00e3 s\u1ebd b\u1ecb hao m\u00f2n \u0111\u00e1ng k\u1ec3.<\/p>\n\n\n\n

C\u00e1c lo\u1ea1i d\u1eef li\u1ec7u v\u00e0 ch\u1ebf \u0111\u1ed9 l\u01b0u tr\u1eef<\/h2>\n\n\n\n

Lo\u1ea1i k\u00fd t\u1ef1 b\u1ea1n m\u00e3 h\u00f3a c\u0169ng quy\u1ebft \u0111\u1ecbnh l\u01b0\u1ee3ng th\u00f4ng tin b\u1ea1n c\u00f3 th\u1ec3 \u0111\u01b0a v\u00e0o m\u1ed9t m\u00e3 QR. M\u00e3 QR s\u1eed d\u1ee5ng c\u00e1c ch\u1ebf \u0111\u1ed9 m\u00e3 h\u00f3a kh\u00e1c nhau \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a kh\u00f4ng gian t\u00f9y thu\u1ed9c v\u00e0o n\u1ed9i dung. Ch\u1ebf \u0111\u1ed9 s\u1ed1 l\u00e0 hi\u1ec7u qu\u1ea3 nh\u1ea5t, cho ph\u00e9p l\u00ean \u0111\u1ebfn 7.089 k\u00fd t\u1ef1 v\u00ec n\u00f3 ch\u1ec9 x\u1eed l\u00fd c\u00e1c ch\u1eef s\u1ed1 0-9. Ch\u1ebf \u0111\u1ed9 ch\u1eef v\u00e0 s\u1ed1 h\u1ed7 tr\u1ee3 c\u00e1c ch\u1eef s\u1ed1, ch\u1eef c\u00e1i vi\u1ebft hoa v\u00e0 m\u1ed9t v\u00e0i k\u00fd hi\u1ec7u, gi\u1edbi h\u1ea1n dung l\u01b0\u1ee3ng \u1edf 4.296 k\u00fd t\u1ef1.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p h\u01a1n, ch\u1eb3ng h\u1ea1n nh\u01b0 URL trang web c\u00f3 k\u00fd t\u1ef1 \u0111\u1eb7c bi\u1ec7t, ch\u1ebf \u0111\u1ed9 nh\u1ecb ph\u00e2n ho\u1eb7c \u201cByte\u201d \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, l\u00e0m gi\u1ea3m dung l\u01b0\u1ee3ng xu\u1ed1ng c\u00f2n 2.953 k\u00fd t\u1ef1. N\u1ebfu b\u1ea1n m\u00e3 h\u00f3a c\u00e1c t\u1eadp l\u1ec7nh chuy\u00ean bi\u1ec7t nh\u01b0 Kanji, gi\u1edbi h\u1ea1n s\u1ebd gi\u1ea3m xu\u1ed1ng c\u00f2n 1.817 k\u00fd t\u1ef1. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao m\u1ed9t s\u1ed1 \u0111i\u1ec7n tho\u1ea1i \u0111\u01a1n gi\u1ea3n t\u1ea1o ra m\u1ed9t m\u00e3 tr\u00f4ng g\u1ecdn g\u00e0ng h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ed9t li\u00ean k\u1ebft web d\u00e0i, \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a.<\/p>\n\n\n\n

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T\u1ea1o m\u00e3 QR mang th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a b\u1ea1n ngay h\u00f4m nay<\/strong> D\u00f9ng c\u1ee7a ch\u00fang t\u00f4i Tr\u00ecnh t\u1ea1o m\u00e3 QR c\u00f3 Logo<\/a> \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c m\u00e3 chuy\u00ean nghi\u1ec7p, dung l\u01b0\u1ee3ng cao, duy tr\u00ec nh\u1eadn di\u1ec7n th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a b\u1ea1n m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m t\u1ed1c \u0111\u1ed9 qu\u00e9t.<\/p>\n<\/blockquote>\n\n\n\n

C\u00e2n b\u1eb1ng m\u1eadt \u0111\u1ed9 d\u1eef li\u1ec7u v\u1edbi k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd<\/h2>\n\n\n\n

M\u1eadt \u0111\u1ed9 d\u1eef li\u1ec7u \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u1ea7n thi\u1ebft \u0111\u1ec3 qu\u00e9t th\u00e0nh c\u00f4ng. M\u1ed9t m\u00e3 QR phi\u00ean b\u1ea3n cao v\u1edbi h\u00e0ng ngh\u00ecn k\u00fd t\u1ef1 \u0111\u01b0\u1ee3c n\u00e9n v\u00e0o m\u1ed9t \u00f4 vu\u00f4ng nh\u1ecf s\u1ebd t\u1ea1o ra c\u00e1c m\u00f4-\u0111un c\u1ef1c nh\u1ecf m\u00e0 h\u1ea7u h\u1ebft c\u00e1c c\u1ea3m bi\u1ebfn \u0111i\u1ec7n tho\u1ea1i kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c. \u0110\u1ec3 duy tr\u00ec \u0111\u1ed9 tin c\u1eady, b\u1ea1n ph\u1ea3i tu\u00e2n theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t \u0111\u1ec3 \u0111\u1ecdc m\u00e3 QR<\/a> b\u1eb1ng c\u00e1ch kh\u1edbp k\u00edch th\u01b0\u1edbc c\u1ee7a m\u00e3 v\u1edbi kho\u1ea3ng c\u00e1ch qu\u00e9t.<\/p>\n\n\n\n

M\u1ed9t quy t\u1eafc th\u1ef1c t\u1ebf l\u00e0 t\u1ef7 l\u1ec7 10:1, ngh\u0129a l\u00e0 m\u00e3 ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t 1 inch cho m\u1ed7i 10 inch kho\u1ea3ng c\u00e1ch gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e3. \u0110\u1ed1i v\u1edbi c\u00e1c v\u1eadt ph\u1ea9m t\u1ea7m g\u1ea7n nh\u01b0 danh thi\u1ebfp, k\u00edch th\u01b0\u1edbc 0,8 x 0,8 inch (2 x 2 cm) th\u01b0\u1eddng l\u00e0 m\u1ee9c t\u1ed1i thi\u1ec3u an to\u00e0n. Ngo\u00e0i ra, m\u1ed7i m\u00e3 QR c\u1ea7n m\u1ed9t \u201cv\u00f9ng y\u00ean t\u0129nh\u201d (quiet zone), l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng vi\u1ec1n r\u00f5 r\u00e0ng r\u1ed9ng \u00edt nh\u1ea5t g\u1ea5p b\u1ed1n l\u1ea7n chi\u1ec1u r\u1ed9ng c\u1ee7a m\u1ed9t m\u00f4-\u0111un \u0111\u01a1n l\u1ebb. Kho\u1ea3ng tr\u1eafng n\u00e0y gi\u00fap m\u00e1y qu\u00e9t x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed b\u1eaft \u0111\u1ea7u c\u1ee7a m\u00e3 v\u00e0 ng\u0103n c\u00e1c \u0111\u1ed3 h\u1ecda xung quanh l\u00e0m nhi\u1ec5u c\u00e1c m\u1eabu d\u1eef li\u1ec7u.<\/p>\n\n\n\n

T\u1ea1i sao m\u00e3 QR \u0111\u1ed9ng gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 dung l\u01b0\u1ee3ng<\/h2>\n\n\n\n

M\u1ed9t trong nh\u1eefng c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u1ec3 qu\u1ea3n l\u00fd gi\u1edbi h\u1ea1n d\u1eef li\u1ec7u l\u00e0 ch\u1ecdn m\u00e3 QR t\u0129nh v\u00e0 \u0111\u1ed9ng<\/a> d\u1ef1a tr\u00ean nhu c\u1ea7u c\u1ee7a b\u1ea1n. M\u00e3 t\u0129nh nh\u00fang t\u1ea5t c\u1ea3 th\u00f4ng tin tr\u1ef1c ti\u1ebfp v\u00e0o m\u1eabu, ngh\u0129a l\u00e0 b\u1ea1n c\u00e0ng th\u00eam nhi\u1ec1u d\u1eef li\u1ec7u, m\u00e3 c\u00e0ng tr\u1edf n\u00ean ph\u1ee9c t\u1ea1p. N\u1ebfu b\u1ea1n c\u1ed1 g\u1eafng nh\u00fang m\u1ed9t vCard \u0111\u1ea7y \u0111\u1ee7 ho\u1eb7c m\u1ed9t URL d\u00e0i v\u1edbi c\u00e1c tham s\u1ed1 theo d\u00f5i, m\u00e3 c\u00f3 th\u1ec3 tr\u1edf n\u00ean qu\u00e1 d\u00e0y \u0111\u1eb7c \u0111\u1ec3 qu\u00e9t \u0111\u00e1ng tin c\u1eady tr\u00ean c\u00e1c b\u1ec1 m\u1eb7t nh\u1ecf.<\/p>\n\n\n\n

M\u00e3 QR \u0111\u1ed9ng gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y b\u1eb1ng c\u00e1ch m\u00e3 h\u00f3a m\u1ed9t URL chuy\u1ec3n h\u01b0\u1edbng ng\u1eafn, c\u00f3 \u0111\u1ed9 d\u00e0i c\u1ed1 \u0111\u1ecbnh thay v\u00ec n\u1ed9i dung th\u1ef1c t\u1ebf. V\u00ec chu\u1ed7i \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a lu\u00f4n ng\u1eafn, m\u00e3 QR v\u1eabn \u1edf phi\u00ean b\u1ea3n th\u1ea5p (th\u01b0\u1eddng l\u00e0 Phi\u00ean b\u1ea3n 1 ho\u1eb7c 2), t\u1ea1o ra m\u1ed9t l\u01b0\u1edbi s\u1ea1ch, \u0111\u01a1n gi\u1ea3n c\u00f3 th\u1ec3 qu\u00e9t ngay l\u1eadp t\u1ee9c. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y cho ph\u00e9p b\u1ea1n chia s\u1ebb l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u \u2013 nh\u01b0 h\u00ecnh \u1ea3nh \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao, t\u1ec7p PDF l\u1edbn ho\u1eb7c c\u00e1c trang \u0111\u00edch ph\u1ee9c t\u1ea1p \u2013 trong khi v\u1eabn gi\u1eef b\u1ea3n in v\u1eadt l\u00fd nh\u1ecf g\u1ecdn v\u00e0 trang nh\u00e3.<\/p>\n\n\n\n

\"QR<\/figure>\n\n\n\n

C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n
M\u00e3 QR c\u00f3 th\u1ec3 l\u01b0u tr\u1eef l\u01b0\u1ee3ng d\u1eef li\u1ec7u t\u1ed1i \u0111a l\u00e0 bao nhi\u00eau?<\/strong>

M\u00e3 QR Phi\u00ean b\u1ea3n 40 c\u00f3 th\u1ec3 l\u01b0u tr\u1eef t\u1ed1i \u0111a 7.089 k\u00fd t\u1ef1 s\u1ed1 ho\u1eb7c 4.296 k\u00fd t\u1ef1 ch\u1eef v\u00e0 s\u1ed1. Tuy nhi\u00ean, nh\u1eefng m\u00e3 n\u00e0y c\u1ef1c k\u1ef3 d\u00e0y \u0111\u1eb7c v\u00e0 y\u00eau c\u1ea7u c\u00e1c khu v\u1ef1c in l\u1edbn \u0111\u1ec3 c\u00f3 th\u1ec3 qu\u00e9t \u0111\u01b0\u1ee3c.<\/p> <\/div>

Vi\u1ec7c th\u00eam logo \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn dung l\u01b0\u1ee3ng d\u1eef li\u1ec7u nh\u01b0 th\u1ebf n\u00e0o?<\/strong>

Th\u00eam logo th\u01b0\u1eddng y\u00eau c\u1ea7u m\u1ee9c s\u1eeda l\u1ed7i H (kh\u00f4i ph\u1ee5c 30%) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e3 v\u1eabn c\u00f3 th\u1ec3 qu\u00e9t \u0111\u01b0\u1ee3c. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m kh\u00f4ng gian kh\u1ea3 d\u1ee5ng cho d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n, ngh\u0129a l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n m\u1ed9t phi\u00ean b\u1ea3n m\u00e3 QR cao h\u01a1n ho\u1eb7c k\u00edch th\u01b0\u1edbc in l\u1edbn h\u01a1n.<\/p> <\/div>

M\u00e3 QR c\u00f3 th\u1ec3 qu\u00e1 nh\u1ecf \u0111\u1ec3 qu\u00e9t kh\u00f4ng?<\/strong>

V\u00e2ng. \u0110\u1ed1i v\u1edbi t\u00e0i li\u1ec7u ti\u1ebfp th\u1ecb, b\u1ea1n n\u00ean gi\u1eef k\u00edch th\u01b0\u1edbc tr\u00ean 0,8 x 0,8 inch. B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o h\u01b0\u1edbng d\u1eabn k\u00edch th\u01b0\u1edbc m\u00e3 QR \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c c\u1ea7n thi\u1ebft d\u1ef1a tr\u00ean kho\u1ea3ng c\u00e1ch qu\u00e9t c\u1ee5 th\u1ec3 v\u00e0 m\u1eadt \u0111\u1ed9 d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n.<\/p> <\/div> <\/div>\n\n\n\n\n

B\u1eb1ng c\u00e1ch hi\u1ec3u m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c phi\u00ean b\u1ea3n, s\u1eeda l\u1ed7i v\u00e0 lo\u1ea1i d\u1eef li\u1ec7u, b\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft k\u1ebf m\u00e3 QR v\u1eeba mang t\u00ednh th\u00f4ng tin v\u1eeba c\u00f3 ch\u1ee9c n\u0103ng. Cho d\u00f9 b\u1ea1n in tr\u00ean nh\u00e3n s\u1ea3n ph\u1ea9m nh\u1ecf hay bi\u1ec3n qu\u1ea3ng c\u00e1o l\u1edbn, c\u1ea5u h\u00ecnh ph\u00f9 h\u1ee3p s\u1ebd \u0111\u1ea3m b\u1ea3o kh\u00e1ch h\u00e0ng c\u1ee7a b\u1ea1n lu\u00f4n c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi n\u1ed9i dung k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee7a b\u1ea1n. N\u1ebfu b\u1ea1n mu\u1ed1n gi\u1eef thi\u1ebft k\u1ebf \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1eef li\u1ec7u c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda, h\u00e3y c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng m\u1ed9t tr\u00ecnh t\u1ea1o m\u00e3 QR<\/a> \u0111\u1ec3 t\u1ea1o m\u00e3 \u0111\u1ed9ng cho chi\u1ebfn d\u1ecbch ti\u1ebfp theo c\u1ee7a b\u1ea1n.<\/p>","protected":false},"excerpt":{"rendered":"

Kh\u00e1m ph\u00e1 dung l\u01b0\u1ee3ng d\u1eef li\u1ec7u m\u00e3 QR tr\u00ean 40 phi\u00ean b\u1ea3n. T\u00ecm hi\u1ec3u c\u00e1ch c\u00e1c lo\u1ea1i k\u00fd t\u1ef1 v\u00e0 s\u1eeda l\u1ed7i \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn gi\u1edbi h\u1ea1n l\u01b0u tr\u1eef v\u00e0 \u0111\u1ed9 tin c\u1eady khi qu\u00e9t cho doanh nghi\u1ec7p c\u1ee7a b\u1ea1n.<\/p>","protected":false},"author":17,"featured_media":53155,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-2102","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-to"],"yoast_head":"\nQR Code Data Capacity Limits Explained<\/title>\n<meta name=\"description\" content=\"Explore QR code data capacity across 40 versions. 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Learn how character types and error correction impact storage limits and scan reliability for your business.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pageloot.com\/vi\/how-to\/understand-qr-code-data-limits\/\" \/>\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=\"2019-04-21T17:02:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-29T08:02:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/04\/retail-qr-codes-363ded-160d26fb2e3c.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=\"10 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/pageloot.com\\\/how-to\\\/understand-qr-code-data-limits\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/how-to\\\/understand-qr-code-data-limits\\\/\"},\"author\":{\"name\":\"Siim T\",\"@id\":\"https:\\\/\\\/pageloot.com\\\/es\\\/#\\\/schema\\\/person\\\/fa28992c2e52546f0812833bac852dfe\"},\"headline\":\"QR Code Data Capacity Limits Explained\",\"datePublished\":\"2019-04-21T17:02:10+00:00\",\"dateModified\":\"2026-04-29T08:02:59+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/how-to\\\/understand-qr-code-data-limits\\\/\"},\"wordCount\":1036,\"publisher\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/es\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/how-to\\\/understand-qr-code-data-limits\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pageloot.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/retail-qr-codes-363ded-160d26fb2e3c.webp\",\"articleSection\":[\"Guides\"],\"inLanguage\":\"vi\"},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/pageloot.com\\\/how-to\\\/understand-qr-code-data-limits\\\/\",\"url\":\"https:\\\/\\\/pageloot.com\\\/how-to\\\/understand-qr-code-data-limits\\\/\",\"name\":\"QR Code Data Capacity Limits Explained\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/es\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/how-to\\\/understand-qr-code-data-limits\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/pageloot.com\\\/how-to\\\/understand-qr-code-data-limits\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pageloot.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/retail-qr-codes-363ded-160d26fb2e3c.webp\",\"datePublished\":\"2019-04-21T17:02:10+00:00\",\"dateModified\":\"2026-04-29T08:02:59+00:00\",\"description\":\"Explore QR code data capacity across 40 versions. 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V\u1edbi chuy\u00ean m\u00f4n s\u00e2u s\u1eafc k\u00e9o d\u00e0i h\u01a1n 5 n\u0103m ch\u1ec9 v\u1ec1 m\u00e3 QR, Siim \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t chuy\u00ean gia v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y trong l\u0129nh v\u1ef1c n\u00e0y. Anh \u1ea5y \u0111\u00e3 c\u00f3 nh\u1eefng b\u01b0\u1edbc ti\u1ebfn \u0111\u00e1ng k\u1ec3 trong vi\u1ec7c t\u1eadn d\u1ee5ng c\u00f4ng ngh\u1ec7 QR \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a v\u00e0 t\u0103ng c\u01b0\u1eddng c\u00e1c t\u01b0\u01a1ng t\u00e1c k\u1ef9 thu\u1eadt s\u1ed1. Cu\u1ed9c h\u00e0nh tr\u00ecnh c\u1ee7a anh kh\u00f4ng ch\u1ec9 b\u1eaft \u0111\u1ea7u \u1edf \u0111\u00e2y. Siim c\u00f3 n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt s\u1ed1 s\u00e2u r\u1ed9ng v\u1edbi h\u01a1n 10 n\u0103m kinh nghi\u1ec7m v\u1eefng ch\u1eafc trong l\u0129nh v\u1ef1c Ph\u1ea7n m\u1ec1m d\u01b0\u1edbi d\u1ea1ng d\u1ecbch v\u1ee5 (SaaS), m\u1ed9t minh ch\u1ee9ng cho ki\u1ebfn th\u1ee9c s\u00e2u r\u1ed9ng c\u1ee7a \u00f4ng v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt s\u1ed1.","sameAs":["https:\/\/www.linkedin.com\/in\/siim-tiigimagi\/"]},{"@type":"Question","@id":"https:\/\/pageloot.com\/how-to\/understand-qr-code-data-limits\/#faq-question-18925381f218","position":1,"url":"https:\/\/pageloot.com\/how-to\/understand-qr-code-data-limits\/#faq-question-18925381f218","name":"M\u00e3 QR c\u00f3 th\u1ec3 l\u01b0u tr\u1eef l\u01b0\u1ee3ng d\u1eef li\u1ec7u t\u1ed1i \u0111a l\u00e0 bao nhi\u00eau?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A Version 40 QR code can store up to 7,089 numeric characters or 4,296 alphanumeric characters. However, these codes are extremely dense and require large printing areas to be scannable.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/how-to\/understand-qr-code-data-limits\/#faq-question-4a6c7f22fd2a","position":2,"url":"https:\/\/pageloot.com\/how-to\/understand-qr-code-data-limits\/#faq-question-4a6c7f22fd2a","name":"Vi\u1ec7c th\u00eam logo \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn dung l\u01b0\u1ee3ng d\u1eef li\u1ec7u nh\u01b0 th\u1ebf n\u00e0o?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Adding a logo typically requires Level H error correction (30% recovery) to ensure the code still scans. This reduces the available space for your data, meaning you may need a higher QR code version or a larger print size.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/how-to\/understand-qr-code-data-limits\/#faq-question-e6b895056c0b","position":3,"url":"https:\/\/pageloot.com\/how-to\/understand-qr-code-data-limits\/#faq-question-e6b895056c0b","name":"M\u00e3 QR c\u00f3 th\u1ec3 qu\u00e1 nh\u1ecf \u0111\u1ec3 qu\u00e9t kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. For marketing materials, you should generally stay above 0.8 x 0.8 inches. You can refer to a QR code size guide to determine the exact dimensions needed based on your specific scanning distance and data density.","inLanguage":"vi"},"inLanguage":"vi"}]}},"_links":{"self":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/2102","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/comments?post=2102"}],"version-history":[{"count":2,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/2102\/revisions"}],"predecessor-version":[{"id":53752,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/2102\/revisions\/53752"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media\/53155"}],"wp:attachment":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media?parent=2102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/categories?post=2102"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/tags?post=2102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}