Initializing, please wait a moment

Kiem tra man hinh laptop - checklist 5 phut truoc khi mua hoac tra

Cap nhat lan cuoi 2026-05-04. Nam buoc kiem tra nhanh ban co the chay tren trinh duyet voi laptop ban sap giu lai, sap tra, hoac mua may da qua su dung. Khong cai dat, khong driver, khong can mat khau admin. Hoat dong tren laptop Windows, macOS, ChromeOS va Linux co trinh duyet hien dai.

Cau tra loi trong 30 giay. Man hinh laptop co nam thu can kiem tra ma man hinh desktop khong co: pixel chet hoac ket, thay doi do sang giua pin va dien luoi, doi mau khi ban nghieng nap, choi bong vs nham trong can phong ban thuc su dung, va kha nang doc o ti le HiDPI. Chay tat ca trong nam phut voi cong cu kiem tra LCD. Neu mot kiem tra nao that bai, quyet dinh trong khi cua so doi tra van mo - bao hanh nha san xuat thuong yeu cau ban gui hang ve, trong khi tra hang trong cua so la khong hoi gi.

Tai sao kiem tra man hinh laptop khac voi kiem tra man hinh desktop

Man hinh desktop ngoi o mot goc co dinh voi mot nguon dien co dinh. Man hinh laptop nghieng tren ban le, chay pin nhieu gio roi chay dien luoi, ra mat o lop bong hoac nham, va render o mat do pixel khong chuan (200% tren panel 2K 13 inch, 150% tren panel 1,5K 14 inch). Moi su khac biet trong bon do giau mot loai loi ma kiem tra desktop khong phat hien. Checklist man hinh desktop (san pixel chet + dong nhat + dai gradient) van ap dung, nhung chi la cai dau tien trong nam kiem tra.

Bon cai con lai den tu cach laptop duoc dung: ban se nghieng nap, ban se chuyen nguon dien, ban se ngoi trong phong duoc cua so chieu sang, va he dieu hanh se phong to UI cho ban. Kiem tra moi cai truoc khi cua so doi tra dong. Cong cu kiem tra LCD day du bao gom tat ca - nut bam la mau lap kin, nhung cach ban dung mau lap kin khac nhau tren laptop.

Kiem tra 1 - Pixel chet va ket (60 giay)

Mo bai kiem tra LCD va luot qua do, xanh la, xanh duong, trang, va den o che do toan man hinh. Giu moi mau 10 giay, mat cach panel 30-50 cm.

  • Pixel chet. Subpixel bi tat vinh vien. Trong nhu cham den tren moi mau tru den. Tren panel laptop 2K (khoang 3,6 trieu pixel), mot hai subpixel chet la binh thuong ve mat thong ke; ISO 9241-307 Class II cho phep den 2 chet va 2 ket tren co panel nay truoc khi xet la loi.
  • Pixel ket. Subpixel bat vinh vien o cuong do toi da. Hien nhu cham do, xanh la hoac xanh duong sang tren nen den. Pixel ket doi khi co the hoi phuc bang video "pixel exerciser" lat mau nhanh trong 10-30 phut - nhung neu ban thay no trong 10 giay dau, dang tin cay hon la tra may khi con co the. Huong dan kiem tra pixel chet noi chi tiet ve cac mau chan doan.
  • Loi nhieu pixel. Nhieu loi trong ban kinh 5 mm. Da so bao hanh che cai nay bat ke so luong - ngay ca panel "Class II cho phep 2 chet" voi 2 pixel chet o cung mot goc cung la duoc tra.

Ghi vi tri va mau cua moi loi. Neu dien thoai trong tay, chup loi tren nen lam no hien ra - anh la bang chung nhan vien bao hanh se hoi.

Kiem tra 2 - Duong cong do sang khi dung pin vs AC (60 giay)

Da so laptop lam toi man hinh khi rut sac AC de tiet kiem pin. Mot so panel cung gioi han do sang toi da khi chay pin (mot tinh nang "tiet kiem pin" co ghi nhung nha san xuat khong luon cong bo). Cach kiem tra:

  1. Cam sac AC, dat do sang man hinh 100% trong he dieu hanh, mo bai kiem tra LCD o nen trang.
  2. Ghi do sang thay duoc so voi mot tham chieu co dinh (vi du to giay trang giu canh man hinh, duoc chieu sang boi cung anh sang phong).
  3. Rut sac AC. Doi 5 giay. So sanh voi cung tham chieu.
  4. Neu man hinh toi di ro rang, mo cai dat nguon he dieu hanh va kiem tra xem "lam toi man hinh khi pin" co phai nguyen nhan. Neu khong, panel dang ap mot cap pin.

Chap nhan duoc: man hinh giu cung do sang, HOAC he dieu hanh lam toi va ban co the tat. Khong chap nhan duoc: man hinh toi di ro rang va cai dat nguon he dieu hanh khong co tuy chon lien quan - day la cap o muc panel va ban co the muon biet truoc khi cua so doi tra dong.

Kiem tra 3 - Doi mau IPS khi nghieng nap (45 giay)

Mot panel IPS tot giu mau on dinh den khoang 80 do lech truc. Mot panel TN re hon doi mau ro rang ngay o 30 do lech truc. Tren laptop ban se thay dieu nay moi khi doi tu the, nga nguoi ve sau, hoac dong nap mot phan. Cach kiem tra:

  1. Mo bai kiem tra LCD o nen do dac. Dat nap o goc thoai mai (khoang 110 do tu phuong nam ngang).
  2. Nghieng nap ve truoc den 90 do, roi ra sau den 130 do, theo doi mau.
  3. Lap lai voi xanh duong va trang. Trang la nhay nhat - bat ky am sac mau nao (vang hoi o mot goc, xanh hoi o goc khac) la panel kieu TN.

Chap nhan duoc: mau o trong khoang gan nhu khong thay doi qua dai nghieng 40 do. Khong chap nhan duoc: do thanh cam hong khi nghieng ve truoc, hoac trang thanh vang khi nghieng ra sau - day la panel TN ban duoi nhan "IPS-grade" hoac mot don vi IPS bi loi. Kiem tra spec sheet truoc; neu spec hua IPS, don vi bi loi.

Kiem tra 4 - Choi sang bong vs nham trong phong cua ban (60 giay)

Man hinh laptop bong nhin sac net trong moi truong anh sang kiem soat nhung phan chieu moi cua so va den tran trong phong thuc. Laptop nham phan tan anh sang do thanh suong mu dong nhat lam giam tuong phan mot chut nhung van dung duoc. Da so demo o cua hang chay tren may bong trong phong trien lam toi; ban se dung may cua minh canh cua so bep. Cach kiem tra:

  1. Ngoi vao ban noi ban se thuc su dung laptop. Chieu sang nhu ban thuong (mo cua so, bat den, v.v.)
  2. Mo bai kiem tra LCD o nen den.
  3. Ghi bat ky phan chieu nao ban thay tren panel: vien cua so, den tran, khuon mat cua ban.

Chap nhan duoc cho panel bong trong phong toi: phan chieu mo ban co the bo qua. Chap nhan duoc cho panel nham trong phong sang: lop suong mem dong nhat, khong phan chieu sac net. Khong chap nhan duoc: panel bong trong phong sang voi phan chieu sac net ma ban khong tranh duoc - man hinh on, nhung sai panel cho cach dung cua ban. Tra hang de hon trong tuan dau so voi sau do - neu phong khong phu hop, doi sang don vi nham khi con co the.

Kiem tra 5 - Kha nang doc o ti le HiDPI (45 giay)

Laptop ngay cang ra mat o mat do pixel "kieu Retina" (ti le 200% tren panel 2K 13 inch, 150% tren panel 1,5K 14 inch). He dieu hanh phong moi thanh phan UI len de bu lai. Da so app render dung o 200%; mot so app legacy render o 100% va nho xiu. Cach kiem tra:

  1. Mo trang bai kiem tra LCD (hoac bat ky trang web nao co text) o do phan giai goc cua laptop.
  2. Xac nhan text than thoai mai o khoang cach doc 30-50 cm. Neu qua nho, tang ti le he dieu hanh va thu lai.
  3. Mo mot hai app hang ngay. Ghi cai nao render qua nho hoac qua to - app cu khong co metadata HiDPI.

Chap nhan duoc: he so ti le he dieu hanh lam text thoai mai cung giu cac app hang ngay de doc. Khong chap nhan duoc: moi muc tang ti le pha vo it nhat mot app ban dung hang ngay, hoac khong he so ti le nao tao text de doc tren panel - day la lech giua panel va thi luc. Tra hang khi con co the.

Khi nao xep la tra vs giu lai

  • Tra ngay: bat ky loi nao tu Kiem tra 1 trong 30 giay dau, giam do sang cap panel khi chay pin ma ban khong the tat (Kiem tra 2), doi mau kieu TN tren don vi ban duoi nhan IPS (Kiem tra 3), khong he so ti le nao tao text app hang ngay de doc (Kiem tra 5).
  • Tra neu co the: sai do bong cho phong (Kiem tra 4) - panel khong loi, nhung don vi khong phu hop voi ban.
  • Giu: mot hai loi pixel trong gioi han spec nha san xuat (Class II cho phep den 2 chet + 2 ket tren panel 2K), drift IPS nho xiu duoi 5 do, choi sang mo trong phong toi.

Ghi nhan loi voi anh va timestamp truoc khi bat dau quy trinh tra hang. Nhan vien dau day khong thay duoc man hinh ban; mot anh tren nen quen thuoc (cac man hinh mau cua bai kiem tra LCD) la cach nhanh nhat de chung minh loi.

Cai checklist nay khong phat hien duoc

  • Do chinh xac mau / pham vi sRGB / Adobe RGB. Can colorimeter (DisplayCAL, X-Rite, Datacolor) cho viec do.
  • Thoi gian phan hoi / motion blur / on dinh tan so quet. Can frame-time logger hoac camera toc do cao.
  • Dinh do sang HDR o cd/m^2 tuyet doi. Can may do do roi.
  • Do chinh xac man hinh cam ung / chong nham long ban tay. Can mau test touch rieng va but stylus.
  • Thoi luong pin duoi tai lien tuc. Can thuc su chay laptop bang pin mot tieng.

Bai kiem tra LCD dua tren trinh duyet bat duoc nhung loai loi co tinh chat loai bo panel - pixel chet, pixel ket, doi mau IPS, cap do sang, va kha nang doc o ti le. No khong do duoc chat luong hieu nang cua panel. Cho bo dung cu day du truoc cuoc goi, xem checklist kiem tra thiet bi cho lam viec tu xa, bo sung cac bai kiem tra camera, micro, va ban phim tren nam buoc kiem tra man hinh nay.

Chay bai kiem tra

Mo freetoolonline.com/lcd-test.html. Man hinh dau tien giai thich cac dieu khien (phim cach de chuyen mau, Esc de thoat full-screen). Chay Kiem tra 1 truoc - day la kiem tra duy nhat co the loai don vi mot minh. Neu Kiem tra 1 dat, mang laptop den ban noi ban se thuc su dung va chay Kiem tra 2 den 5 o do. Toan bo trinh tu vua trong nam phut neu khong co loi xuat hien; neu co, ban se biet trong 60 giay dau. Du sao di nua, cua so doi tra ngan hon bao hanh - chay bai kiem tra ngay ngay dau tien.

Bai doc lien quan ve cung panel:

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. Your file is processed in your browser and never uploaded. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

Why trust these tools

  • Ten-plus years of web tooling. The freetoolonline editorial team has shipped browser-based utilities since 2015. The goal has never changed: get you to a working output fast, without an install.
  • Truly in-browser - no upload. Every file-processing tool on this site runs in your browser through modern Web APIs (File, FileReader, Canvas, Web Audio, WebGL, Web Workers). Your photo, PDF, audio, or text never leaves your device.
  • No tracking during tool use. Analytics ends at the page view. The actual input you paste, drop, or capture is never sent to any server and never written to any log.
  • Open-source core components. The processing engines underneath (libheif, libde265, pdf-lib, terser, clean-css, ffmpeg.wasm, and others) are public and audit-able. We link to each one in its tool page's footer.
  • Free, with or without ads. All tools are fully functional without sign-up. The Disable Ads button in the header is always available if you need a distraction-free run.