{"id":52,"date":"2025-09-24T23:09:26","date_gmt":"2025-09-24T16:09:26","guid":{"rendered":"https:\/\/teencode.vip\/blog\/?p=52"},"modified":"2025-09-24T23:09:28","modified_gmt":"2025-09-24T16:09:28","slug":"tai-sao-ma-qr-tao-ra-moi-ngay-nhung-khong-co-cai-nao-bi-trung-lap","status":"publish","type":"post","link":"https:\/\/teencode.vip\/blog\/tai-sao-ma-qr-tao-ra-moi-ngay-nhung-khong-co-cai-nao-bi-trung-lap\/","title":{"rendered":"T\u1ea1i sao m\u00e3 QR t\u1ea1o ra m\u1ed7i ng\u00e0y nh\u01b0ng kh\u00f4ng c\u00f3 c\u00e1i n\u00e0o b\u1ecb tr\u00f9ng l\u1eb7p ?"},"content":{"rendered":"\n\n
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\n 5\/5 - (1 b\u00ecnh ch\u1ecdn) <\/div>\n <\/div>\n\n

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T\u1ea1i sao m\u00e3 QR t\u1ea1o ra m\u1ed7i ng\u00e0y nhi\u1ec1u th\u1ebf m\u00e0 m\u00e3i v\u1eabn ch\u01b0a h\u1ebft, \u0111\u00e3 th\u1ebf c\u00f2n kh\u00f4ng c\u00f3 c\u00e1i n\u00e0o b\u1ecb tr\u00f9ng l\u1eb7p?<\/p>\n\n\n\n

Nh\u1eefng \u00f4 vu\u00f4ng nh\u1ecf m\u00e0u \u0111en tr\u1eafng tr\u00ean bao b\u00ec s\u1ea3n ph\u1ea9m, v\u00e9 xem phim, hay th\u1ef1c \u0111\u01a1n nh\u00e0 h\u00e0ng \u0111\u00e3 tr\u1edf th\u00e0nh th\u1ee9 quen thu\u1ed9c m\u00e0 ch\u00fang ta nh\u00ecn th\u1ea5y h\u00e0ng ng\u00e0y. \u0110\u00f3 ch\u00ednh l\u00e0 m\u00e3 QR \u2013 m\u1ed9t th\u1ee9 m\u00e3 “th\u1ea7n k\u1ef3” m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 qu\u00e9t b\u1eb1ng \u0111i\u1ec7n tho\u1ea1i \u0111\u1ec3 xem th\u00f4ng tin, nh\u01b0 m\u1edf trang web hay thanh to\u00e1n ti\u1ec1n.<\/p>\n\n\n\n

V\u1edbi s\u1ef1 ph\u1ed5 bi\u1ebfn ng\u00e0y c\u00e0ng t\u0103ng, s\u1ebd kh\u00f4ng \u00edt ng\u01b0\u1eddi h\u1ecfi m\u1ed7i ng\u00e0y c\u00f3 bao nhi\u00eau m\u00e3 QR \u0111\u01b0\u1ee3c t\u1ea1o ra, v\u00e0 t\u1ea1i sao ch\u00fang nh\u00ecn gi\u1ed1ng nhau nh\u01b0 v\u1eady m\u00e0 c\u00f3 th\u1ec3 t\u1ea1o m\u00e3i kh\u00f4ng bao gi\u1edd h\u1ebft?<\/p>\n\n\n\n

H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u00e3 QR gi\u1ed1ng nh\u01b0 nh\u1eefng chi\u1ebfc v\u00e9 \u0111\u1eb7c bi\u1ec7t m\u00e0 m\u1ecdi ng\u01b0\u1eddi t\u1ea1o ra \u0111\u1ec3 l\u00e0m nhi\u1ec1u vi\u1ec7c kh\u00e1c nhau: mua \u0111\u1ed3, qu\u1ea3ng c\u00e1o s\u1ea3n ph\u1ea9m, hay chia s\u1ebb th\u00f4ng tin. Nh\u01b0ng c\u00f3 bao nhi\u00eau “chi\u1ebfc v\u00e9” n\u00e0y \u0111\u01b0\u1ee3c l\u00e0m m\u1ed7i ng\u00e0y tr\u00ean th\u1ebf gi\u1edbi?<\/p>\n\n\n\n

Theo m\u1ed9t s\u1ed1 \u01b0\u1edbc t\u00ednh t\u01b0\u01a1ng \u0111\u1ed1i, c\u00f3 h\u00e0ng tr\u0103m ngh\u00ecn m\u00e3 QR \u0111\u01b0\u1ee3c t\u1ea1o ra m\u1ed7i ng\u00e0y, \u0111\u1eb7c bi\u1ec7t \u1edf c\u00e1c qu\u1ed1c gia m\u00e0 thanh to\u00e1n tr\u1ef1c tuy\u1ebfn th\u00f4ng d\u1ee5ng.<\/p>\n\n\n\n

\u1ede Trung Qu\u1ed1c, nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng \u1ee9ng d\u1ee5ng nh\u01b0 WeChat \u0111\u1ec3 tr\u1ea3 ti\u1ec1n b\u1eb1ng c\u00e1ch qu\u00e9t m\u00e3 QR. H\u00e3y l\u00e0m m\u1ed9t ph\u00e9p t\u00ednh: M\u1ed7i c\u1eeda h\u00e0ng khi thanh to\u00e1n \u0111\u1ec1u c\u00f3 m\u1ed9t m\u00e3 QR ri\u00eang \u0111\u1ec3 kh\u00e1ch qu\u00e9t, m\u1ed7i ng\u00e0y c\u00f3 h\u00e0ng tr\u0103m \u0111\u01a1n h\u00e0ng th\u00ec s\u1ed1 m\u00e3 QR t\u1ea1o ra c\u0169ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n\n\n\n

C\u00e1c c\u00f4ng ty l\u1edbn c\u0169ng th\u01b0\u1eddng in m\u00e3 QR tr\u00ean s\u1ea3n ph\u1ea9m. Qu\u00e9t m\u00e3, b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u th\u00eam th\u00f4ng tin ho\u1eb7c nh\u1eadn khuy\u1ebfn m\u00e3i. M\u1ed7i l\u1ea7n l\u00e0m qu\u1ea3ng c\u00e1o m\u1edbi, h\u1ecd t\u1ea1o m\u00e3 QR m\u1edbi.<\/p>\n\n\n\n

V\u1edbi c\u00e1 nh\u00e2n, ch\u00fang ta c\u00f3 th\u1ec3 t\u1ea1o m\u00e3 QR \u0111\u1ec3 g\u1eedi s\u1ed1 t\u00e0i kho\u1ea3n ho\u1eb7c link cho b\u1ea1n b\u00e8. Kh\u00f4ng ph\u1ea3i ai c\u0169ng l\u00e0m v\u1eady, nh\u01b0ng v\u1edbi h\u01a1n 5 t\u1ef7 ng\u01b0\u1eddi d\u00f9ng internet tr\u00ean th\u1ebf gi\u1edbi, s\u1ed1 l\u01b0\u1ee3ng n\u00e0y g\u00f3p ph\u1ea7n v\u00f4 c\u00f9ng l\u1edbn.<\/p>\n\n\n\n

\u1ede Trung Qu\u1ed1c, m\u1ecdi ng\u01b0\u1eddi qu\u00e9t m\u00e3 QR \u0111\u1ebfn 10-15 l\u1ea7n m\u1ed7i ng\u00e0y, t\u1eeb mua b\u00e1nh m\u00ec \u0111\u1ebfn tr\u1ea3 ti\u1ec1n xe bu\u00fdt. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y m\u00e3 QR v\u00f4 c\u00f9ng ph\u1ed5 bi\u1ebfn, d\u00f9 kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o qu\u00e9t c\u0169ng l\u00e0 t\u1ea1o m\u00e3 m\u1edbi.<\/p>\n\n\n\n

T\u1ea1i sao m\u00e3 QR kh\u00f4ng bao gi\u1edd h\u1ebft?<\/p>\n\n\n\n

M\u00e3 QR ch\u1ec9 l\u00e0 nh\u1eefng \u00f4 vu\u00f4ng r\u1eddi r\u1ea1c, \u0111en tr\u1eafng, v\u00f4 ngh\u0129a \u0111\u01b0\u1ee3c in tr\u00ean di\u1ec7n t\u00edch r\u1ea5t nh\u1ecf. V\u1eady th\u00ec v\u1edbi h\u00e0ng tr\u0103m ngh\u00ecn m\u00e3 QR \u0111\u01b0\u1ee3c t\u1ea1o ra m\u1ed7i ng\u00e0y, li\u1ec7u ch\u00fang c\u00f3 c\u1ea1n ki\u1ec7t hay kh\u00f4ng?<\/p>\n\n\n\n

C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 kh\u00f4ng, v\u00ec s\u1ed1 l\u01b0\u1ee3ng m\u00e3 QR c\u00f3 th\u1ec3 t\u1ea1o ra l\u1edbn \u0111\u1ebfn m\u1ee9c g\u1ea7n nh\u01b0 v\u00f4 h\u1ea1n. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u00e3 QR l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p h\u00e0ng t\u1ef7 t\u1ef7 bi\u1ebfn s\u1ed1 kh\u00e1c nhau, l\u1edbn h\u01a1n c\u1ea3 s\u1ed1 c\u00e1t tr\u00ean b\u00e3i bi\u1ec3n.<\/p>\n\n\n\n

M\u00e3 QR l\u00e0 t\u1eadp h\u1ee3p c\u00e1c \u00f4 vu\u00f4ng nh\u1ecf, gi\u1ed1ng nh\u01b0 m\u1ed9t b\u1ee9c tranh gh\u00e9p h\u00ecnh. M\u1ed7i b\u1ee9c tranh n\u00e0y ch\u1ee9a th\u00f4ng tin ri\u00eang, nh\u01b0 m\u1ed9t c\u00e2u “Ch\u00e0o b\u1ea1n, \u0111\u00e2y l\u00e0 link \u0111\u1ebfn b\u00e0i h\u00e1t y\u00eau th\u00edch c\u1ee7a m\u00ecnh”. Khi b\u1ea1n thay \u0111\u1ed5i c\u00e2u n\u00f3i, b\u1ee9c tranh c\u0169ng \u0111\u1ed5i \u2013 ngh\u0129a l\u00e0 m\u1ed7i th\u00f4ng tin kh\u00e1c nhau s\u1ebd t\u1ea1o ra m\u1ed9t m\u00e3 QR kh\u00e1c nhau.<\/p>\n\n\n\n

V\u00ed d\u1ee5: M\u00e3 QR ch\u1ee9a “Xin ch\u00e0o” s\u1ebd kh\u00e1c v\u1edbi m\u00e3 ch\u1ee9a “T\u1ea1m bi\u1ec7t”. M\u00e3 QR ch\u1ee9a “Link \u0111\u1ebfn YouTube” s\u1ebd kh\u00e1c v\u1edbi m\u00e3 ch\u1ee9a “Link \u0111\u1ebfn Instagram”. V\u1eady, n\u1ebfu b\u1ea1n c\u00f3 th\u1ec3 ngh\u0129 ra h\u00e0ng t\u1ef7 c\u00e2u n\u00f3i ho\u1eb7c \u0111\u01b0\u1eddng link kh\u00e1c nhau, b\u1ea1n s\u1ebd c\u00f3 h\u00e0ng t\u1ef7 m\u00e3 QR kh\u00e1c nhau.<\/p>\n\n\n\n

M\u00e3 QR c\u00f3 nhi\u1ec1u k\u00edch c\u1ee1, t\u1eeb nh\u1ecf (gi\u1ed1ng nh\u01b0 b\u1ee9c tranh 21×21 \u00f4) \u0111\u1ebfn l\u1edbn (177×177 \u00f4). Lo\u1ea1i l\u1edbn nh\u1ea5t c\u00f3 th\u1ec3 ch\u1ee9a t\u1edbi 4.296 ch\u1eef c\u00e1i ho\u1eb7c s\u1ed1 \u2013 nh\u01b0 m\u1ed9t b\u00e0i v\u0103n d\u00e0i. V\u1edbi 36 k\u00fd t\u1ef1 c\u00f3 th\u1ec3 d\u00f9ng (0-9 v\u00e0 A-Z), s\u1ed1 l\u01b0\u1ee3ng m\u00e3 QR c\u00f3 th\u1ec3 t\u1ea1o ra l\u00e0 36^4,296, t\u1ee9c l\u00e0 m\u1ed9t con s\u1ed1 v\u00f4 c\u00f9ng l\u1edbn, l\u1edbn h\u01a1n c\u1ea3 s\u1ed1 sao tr\u00ean tr\u1eddi (kho\u1ea3ng 10^6,699).<\/p>\n\n\n\n

H\u00e3y th\u1eed t\u01b0\u1edfng t\u01b0\u1ee3ng: n\u1ebfu b\u1ea1n vi\u1ebft m\u1ed9t chu\u1ed7i s\u1ed1 v\u00e0 ch\u1eef d\u00e0i 4.296 k\u00fd t\u1ef1, nh\u01b0 “ABC123\u2026”, r\u1ed3i thay \u0111\u1ed5i t\u1eebng k\u00fd t\u1ef1 m\u1ed9t, b\u1ea1n s\u1ebd t\u1ea1o ra bao nhi\u00eau v\u0103n b\u1ea3n kh\u00e1c nhau? C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 nhi\u1ec1u \u0111\u1ebfn m\u1ee9c kh\u00f4ng \u0111\u1ebfm xu\u1ec3, l\u1edbn h\u01a1n c\u1ea3 s\u1ed1 h\u1ea1t c\u00e1t tr\u00ean Tr\u00e1i \u0110\u1ea5t.<\/p>\n\n\n\n

Gi\u1ea3 s\u1eed c\u1ea3 th\u1ebf gi\u1edbi c\u00f3 8 t\u1ef7 ng\u01b0\u1eddi, v\u00e0 m\u1ed7i ng\u01b0\u1eddi t\u1ea1o 1.000 m\u00e3 QR m\u1ed7i ng\u00e0y trong 100 n\u0103m, t\u1ed5ng c\u1ed9ng ch\u1ec9 kho\u1ea3ng 2,92 x 10^14 m\u00e3 QR (292 ngh\u00ecn t\u1ef7). So v\u1edbi s\u1ed1 m\u00e3 QR c\u00f3 th\u1ec3 t\u1ea1o (10^6,699), th\u00ec con s\u1ed1 n\u00e0y r\u1ea5t nh\u1ecf b\u00e9, gi\u1ed1ng nh\u01b0 m\u1ed9t gi\u1ecdt n\u01b0\u1edbc trong \u0111\u1ea1i d\u01b0\u01a1ng. V\u00ec v\u1eady, ch\u00fang ta kh\u00f4ng bao gi\u1edd lo h\u1ebft m\u00e3 QR.<\/p>\n\n\n\n

Ngay c\u1ea3 m\u00e3 QR nh\u1ecf nh\u1ea5t (21×21 \u00f4) c\u0169ng t\u1ea1o \u0111\u01b0\u1ee3c kho\u1ea3ng 10^46 t\u1ed5 h\u1ee3p \u2013 \u0111\u1ee7 \u0111\u1ec3 m\u1ed7i ng\u01b0\u1eddi tr\u00ean Tr\u00e1i \u0110\u1ea5t c\u00f3 h\u00e0ng t\u1ef7 m\u00e3 ri\u00eang m\u00e0 kh\u00f4ng tr\u00f9ng l\u1eb7p.<\/p>\n\n\n\n

So v\u1edbi m\u00e3 v\u1ea1ch (nh\u01b0 tr\u00ean h\u1ed9p s\u1eefa) ch\u1ec9 l\u00e0 m\u1ed9t h\u00e0ng s\u1ed1, c\u00f3 \u00edt t\u1ed5 h\u1ee3p h\u01a1n. M\u00e3 QR l\u00e0 b\u1ee9c tranh 2D, n\u00ean ch\u1ee9a \u0111\u01b0\u1ee3c nhi\u1ec1u th\u00f4ng tin h\u01a1n, gi\u1ed1ng nh\u01b0 m\u1ed9t cu\u1ed1n s\u00e1ch so v\u1edbi m\u1ed9t d\u00f2ng ch\u1eef.<\/p>\n\n\n\n

M\u00e3 QR l\u00e0 m\u1ed9t trong nh\u1eefng ph\u00e1t ki\u1ebfn ti\u1ec7n d\u1ee5ng nh\u1ea5t trong th\u1eddi \u0111\u1ea1i s\u1ed1 v\u00e0 ch\u1eafc ch\u1eafn n\u00f3 s\u1ebd c\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u h\u01a1n, \u0111\u1eb7c bi\u1ec7t khi s\u1ed1 l\u01b0\u1ee3ng t\u1ea1o ra c\u1ee7a ch\u00fang l\u00e0 g\u1ea7n nh\u01b0 v\u00f4 h\u1ea1n.<\/p>\n\n\n\n

(Theo Markettimes)<\/p>\n","protected":false},"excerpt":{"rendered":"

T\u1ea1i sao m\u00e3 QR t\u1ea1o ra m\u1ed7i ng\u00e0y nhi\u1ec1u th\u1ebf m\u00e0 m\u00e3i v\u1eabn ch\u01b0a h\u1ebft, \u0111\u00e3 th\u1ebf c\u00f2n kh\u00f4ng c\u00f3 c\u00e1i n\u00e0o b\u1ecb tr\u00f9ng l\u1eb7p? Nh\u1eefng \u00f4 vu\u00f4ng nh\u1ecf m\u00e0u \u0111en tr\u1eafng tr\u00ean bao b\u00ec s\u1ea3n ph\u1ea9m, v\u00e9 xem phim, hay th\u1ef1c \u0111\u01a1n nh\u00e0 h\u00e0ng \u0111\u00e3 tr\u1edf th\u00e0nh th\u1ee9 quen thu\u1ed9c m\u00e0 ch\u00fang ta nh\u00ecn … \u0110\u1ecdc ti\u1ebfp<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mo_disable_npp":"","pagelayer_contact_templates":[],"_pagelayer_content":"","footnotes":""},"categories":[60],"tags":[58,59,31,57],"class_list":["post-52","post","type-post","status-publish","format-standard","hentry","category-thu-vi","tag-qr-code","tag-qr-support-excel","tag-qrcode","tag-qrexcel-pro"],"_links":{"self":[{"href":"https:\/\/teencode.vip\/blog\/wp-json\/wp\/v2\/posts\/52","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/teencode.vip\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/teencode.vip\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/teencode.vip\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/teencode.vip\/blog\/wp-json\/wp\/v2\/comments?post=52"}],"version-history":[{"count":1,"href":"https:\/\/teencode.vip\/blog\/wp-json\/wp\/v2\/posts\/52\/revisions"}],"predecessor-version":[{"id":53,"href":"https:\/\/teencode.vip\/blog\/wp-json\/wp\/v2\/posts\/52\/revisions\/53"}],"wp:attachment":[{"href":"https:\/\/teencode.vip\/blog\/wp-json\/wp\/v2\/media?parent=52"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/teencode.vip\/blog\/wp-json\/wp\/v2\/categories?post=52"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/teencode.vip\/blog\/wp-json\/wp\/v2\/tags?post=52"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}