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Bai Kiem Tra LCD Lam Gi (va Khi Nao Nen Chay)

Cap nhat lan cuoi 2026-04-27. Bai kiem tra tren man hinh chay quet mau full-screen trong trinh duyet cua ban - khong cai dat, khong driver, khong upload. Hoat dong tren moi desktop, laptop, tablet va dien thoai voi trinh duyet hien dai.

Cau tra loi trong 30 giay. Bai kiem tra LCD lap day man hinh cua ban voi cac mau dac (do, xanh la, xanh duong, trang, den, doi khi co cac buoc xam) de loi tren panel hien ra tren nen dong nhat. Bon thu no phat hien dang tin cay: pixel chet (cham luon den), pixel ket (luon mot mau bat ke dau vao), ro sang vien (do sang khong deu gan canh khi man hinh den), va banding / artifact dithering (cac buoc nhin thay duoc trong gradient). Chay bai nay truoc khi cua so doi tra dong tren mot man hinh moi, truoc khi nhan mot man hinh tan trang, hoac bat ky luc nao ban nghi co "diem la" tren man hinh. Mo cong cu kiem tra LCD va luot qua cac mau.

"Kiem tra LCD" thuc su nghia la gi

Cum tu "kiem tra LCD" la ten chung cho mot nhom nho cac bai kiem tra rieng cho cac loai loi khac nhau. Phien ban dua tren trinh duyet - bai ma huong dan nay noi den - la pho bien nhat vi khong ton tien, chay o bat ky dau, va phat hien duoc cac loi quan trong nhat doi voi nguoi mua. Khong phai lua chon duy nhat (cac nha san xuat chay bo cong cu calibration phuc tap hon trong nha may), nhung do la cai ma 99% nguoi go "kiem tra lcd" vao Google thuc su muon.

Co che don gian: cong cu lap day toan bo man hinh voi mot mau dac. Mot panel hoan hao la mot mat phang dong nhat hoan hao. Loi hien len la nhung sai lech - mot cham nho khac mau, mot manh sang hon hoac toi hon gan goc, mot dai khong tan dan vao dai ke. Mat thuong gioi trong viec phat hien sai lech khoi dong nhat, nen bai kiem tra khong can phan cung chuyen biet de huu ich.

Bon loai loi ma bai kiem tra LCD phat hien

  • Pixel chet. Mot subpixel bi tat vinh vien. Tren nen do, mot pixel chet trong nhu den. Tren nen xanh la cung den. Tren nen den thi vo hinh. Bai kiem tra pixel chet quay qua do, xanh la, xanh duong va trang de moi subpixel bi tat hien ra tren it nhat mot nen. Huong dan kiem tra pixel chet noi chi tiet ve cac mau chan doan.
  • Pixel ket. Mot subpixel bi bat vinh vien o cuong do toi da. Mot subpixel do bi ket hien ra nhu mot cham do sang tren nen den, tren nen xanh duong va tren nen trang. Phan biet chet voi ket quan trong: pixel ket doi khi co the hoi phuc bang video "pixel exerciser" lat mau nhanh trong 10-30 phut; pixel chet thi mat hoan toan.
  • Ro sang vien. Anh sang ro qua canh cua panel LCD noi backlight khong duoc giu kin hoan hao. Thay ro nhat tren nen den trong phong toi - ban thay anh sang khong deu gan goc hoac doc canh. Mot luong nho la binh thuong tren moi panel IPS; nhieu la loi. Da so bao hanh che do "qua muc", duoc nha san xuat dinh nghia mo ho.
  • Banding va artifact dithering. Mot panel chat luong cao co the render gradient muot khong co "buoc" nhin thay. Mot panel voi do sau mau gioi han (6-bit thay vi 8-bit, hoac 8-bit thay vi 10-bit) tao ra cac dai nhin thay duoc khi gradient phu mot dai gia tri rong. Mau buoc xam trong bai kiem tra LCD hien ro dieu nay.

Khi nao chay bai kiem tra LCD la lua chon dung

Nam tinh huong bai kiem tra dang gia hai phut:

  • Truoc khi cua so doi tra dong tren mot man hinh hoac laptop moi. Da so man hinh co chinh sach doi tra 14-30 ngay cong voi bao hanh tu nha san xuat. Chinh sach doi tra cho phep ban doi mot don vi loi ma khong can giai thich; bao hanh thuong yeu cau ban chung minh loi qua video voi support. Chay bai kiem tra trong tuan dau, khi van con co the don gian doi tra.
  • Truoc khi nhan mot man hinh tan trang hoac B-stock. Gia tan trang hap dan nhung mat hang co the thua huong loi ma chu cu tra ve. Chay bai kiem tra trong ngay 1.
  • Truoc khi giu lai trade-in dien thoai hoac tablet. Nha mang va dai ly thinh thoang chuyen di thiet bi trade-in voi hu hai man hinh an. Bai kiem tra pixel hien ra dieu do trong cua so doi tra cua nha mang.
  • Khi ban nghi co "diem la" tren mot man hinh ban da co. Mot hat bui phia tren man hinh trong giong het mot pixel chet o khoang cach mot canh tay. Bai kiem tra LCD xac nhan no o tren be mat (lau bang khan microfiber) hay ben trong panel (truong hop bao hanh).
  • Truoc khi xuat hien cong khai voi rig streaming, choi game hoac thiet ke. Mot loi vo hinh tren desktop binh thuong cua ban co the cuc ky lo ro tren nen green-screen dac hoac mot mau dong nhat trong cuoc goi video. Kiem tra rig voi nhung mau ban thuc su phat song.

Vay con cho su dung hang ngay? Co le bo qua - bai kiem tra la cho "panel co chap nhan duoc khong?", khong phai "panel co calibrate hoan hao cho color-grading khong?". Calibrate mau la quy trinh rieng voi phan cung rieng (mot colorimeter).

Cach doc ket qua bai kiem tra

Luot qua tung mau o che do full-screen trong 5-10 giay, mat cach panel khoang 30-50 cm. Ban tim:

  • Tinh dong nhat cua pixel. Bat ky cham nao trai voi nen la ung vien loi. Ghi vi tri (vi du "trai-tren, vao trong khoang 3 cm"). Lap lai cho tat ca mau - pixel chet hien o mot mau, pixel ket hien o ba hoac bon mau.
  • Tinh dong nhat cua canh. Tren nen den trong phong toi, quet bon canh. Anh sang deu = OK. Goc sang hoac soc = ro sang vien.
  • Gradient muot. Cham rai di qua dai mau xam. Ban nen thay su mo dan lien tuc tu den den trang, khong phai cac buoc nhin thay.
  • Doi tone mau theo goc nhin. Nghieng dau sang mot ben. Mot panel IPS tot giu mau on dinh den khoang 80 do lech truc. Mot panel TN re doi mau ro ngay o 30 do. Huu ich biet truoc khi mua.

Mot hoac hai loi pixel tren panel 4K (8,3 trieu pixel) la pho bien ve thong ke va da so bao hanh khong che. Nguong cho "co loi" thay doi: ISO 9241-307 Class II cho phep den 2 pixel chet va 2 pixel ket tren panel 4K. Tren do, tra lai.

Tai sao bai kiem tra dua tren trinh duyet la du

Ban khong can mot ung dung cai dat de lam viec nay. Trinh duyet da co the render mau dac toan man hinh, va do la co che duy nhat bai kiem tra can. Bai kiem tra dua tren trinh duyet co ba uu the khac so voi lua chon cai dat:

  • Da nen tang. Cung mot bai kiem tra tren Windows, macOS, Linux, ChromeOS, iPadOS, Android, trinh duyet smart-TV. Khong can tuong thich driver, khong can quyen cai dat, khong can mat khau admin.
  • Khong co drift phien ban. Trang duoc cap nhat trung tam; ban luon chay phien ban hien tai. Cong cu cai dat thi lao hoa - cap nhat lan cuoi ba nam truoc la binh thuong.
  • Rieng tu. Khong upload file, khong telemetry ngoai log truy cap web server tieu chuan. Bai kiem tra thuan tuy la lenh render gui den man hinh cua ban.

Noi bai kiem tra dua tren trinh duyet thieu sot: kiem tra thoi gian phan hoi, tan so quet va tuan thu HDR kho hon trong trinh duyet ma khong co phan cung chuyen biet. Cho choi game canh tranh hoac cong viec mau quan trong, cong cu chuyen biet (TestUFO, DisplayCAL, phan cung calibrator) phu cac khoang trong do.

Cai bai kiem tra LCD khong the phat hien

Danh sach gioi han huu ich:

  • Do chinh xac mau / pham vi gamut. Can colorimeter cho viec do.
  • Thoi gian phan hoi / motion blur. Can TestUFO hoac camera toc do cao.
  • On dinh tan so quet. Can mot frame time logger.
  • Do chinh xac touch screen. Can mot cong cu kiem tra touch rieng.
  • Do dong nhat cua do sang theo cd/m^2 tuyet doi. Can mot may do do roi.

Bai kiem tra LCD phat hien cac loai loi co tinh chat loai bo panel; no khong do duoc chat luong hieu nang. Cho mot bo dung cu day du truoc cuoc goi xem checklist kiem tra thiet bi cho lam viec tu xa bao gom them cac bai kiem tra camera, micro va ban phim.

Chay bai kiem tra

Mo freetoolonline.com/lcd-test.html. Man hinh dau tien giai thich cac dieu khien (phim cach de chuyen, Esc de thoat khoi full-screen). Di qua do, xanh la, xanh duong, trang, den, va dai mau xam. Ghi lai bat ky loi nao ban phat hien. Neu panel cua ban sach, ban xong trong duoi hai phut. Neu tim duoc gi do, quyet dinh xem no co du dieu kien doi tra hay khong - va bat dau cuoc tro chuyen do trong khi cua so van mo.

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.

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