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Cach kiem tra diem chet truoc khi tra lai man hinh

Mot man hinh moi voi mot pixel chet thi kho chiu; mot pixel chet duoc phat hien mot tuan sau cua so tra lai thi tot kem. Hau het cac nha ban le va nha san xuat cho phep mot tra lai hoac doi trong mot cua so duoc nieu ro, nhung chi neu loi duoc xac minh. Huong dan nay di qua bai kiem tra 5 phut bat duoc pixel chet, pixel ket, ro ri den nen, va van de dong nhat mau truoc khi ban da qua han tra lai - va bao quat tai lieu nao ban can neu viec tra lai di den xem xet bao hanh.


Pixel chet vs pixel ket vs sub-pixel

Pixel chet. Mot pixel duy nhat khong bao gio sang. Tren nen trang xuat hien den; tren bat ky nen mau nao cung xuat hien den. Transistor dieu khien pixel do da hong; khong gi ban lam voi phan mem se sua duoc. Day la loi nha san xuat chap nhan nhu mot tra lai.

Pixel ket. Mot pixel luon hien thi mot mau bat ke he dieu hanh ve gi. Thuong ket o do, xanh la, hoac xanh duong vi mot sub-pixel "bat" vinh vien. Doi khi co the sua duoc bang cach chay phan mem cycle pixel (mau "JScreenFix", FFmpeg pixel-flicker) trong vai gio; thuong khong. Hau het cac nha san xuat khong chap nhan pixel ket nhu mot tra lai tru khi ban co nhieu cum chung lai.

Loi sub-pixel. Mot trong ba sub-pixel (R, G, hoac B) trong mot pixel duy nhat bi ket hoac chet. Kho thay hon - hien thi nhu mot mau nhe tren cac mau dac. Nhin chung khong la can cu de tra lai.


Trinh tu kiem tra 5 phut

Dung cong cu LCD test cua chung toi o che do toan man hinh tren display dang kiem tra. Cong cu cycle cac mau dac - do, xanh la, xanh duong, den, trang, vang - mot toan man hinh moi lan.

  1. Mo cua phong. Anh sang xung quanh che giau cac loi tinh te. Mot phong toi vao ban dem la ly tuong; dong rem va lam dim den tran hoat dong vao ban ngay.
  2. Chay o do phan giai goc. Dat display he dieu hanh o do phan giai duoc danh gia cua man hinh (thuong QHD 1440p hoac 4K UHD). Quy dinh xuong lam mem loi; chay native hien thi moi pixel o 1:1.
  3. Cycle ca sau mau o toan man hinh. Voi moi mau, di chuyen mat tu tu khap bang - tren-trai, tren-phai, giua, duoi-phai, duoi-trai. Danh 20-30 giay cho moi mau. Ghi nhan bat ky pixel nao khong khop voi truong xung quanh.
  4. Chup anh bat ky loi nao. Dung camera dien thoai voi flash tat, lay net vao man hinh. Chup mot anh rong cho thay man hinh tong the va mot anh can canh cua moi loi. Bao gom truong mau tiet lo loi (pixel chet hien thi tot nhat tren trang; pixel ket hien thi tot nhat tren mau doi nghich).
  5. Tat Night Shift, Bo Loc Anh Sang Xanh, va HDR. Cac tinh nang do dich chuyen mau; phat hien loi can dau ra trung lap.

Ngoai pixel chet - cac loi man hinh moi thong dung khac

Ro ri den nen. Tren mot truong den dac, tim sang khong deu gan canh man hinh. Mot so ro ri la khong tranh khoi tren bang IPS; ro ri nang (goc sang, soc khong deu) la mot loi.

Dong nhat mau. Tren mot xam trung dac (50% xam), tim mau hong/xanh la/vang o cac vung khac nhau. Dong nhat ly tuong la mot truong xam hoan toan deu; bien doi tinh te la binh thuong; mau khu vuc manh chi ra loi bang.

Banding. Tren mot dai chuyen muot tu xam (LCD test cua chung toi co the render mot cai), tim cac buoc thay duoc giua cac dai mau. Cac bang 8-bit co mot so banding; cac bang 10-bit nen muot.

Hang hoac cot chet. Hiem nhung nang. Mot dong ngang hoac doc toan bo chet hoac ket. Khong the nham lan tren cycle mau. Can cu de tra lai ngay lap tuc.


Nhung gi nha san xuat va nha ban le chap nhan

Chinh sach chap nhan thay doi theo nha cung cap va khu vuc. Nguong thong dung (kiem tra nha cung cap cu the cua ban):

Dong pro Dell, HP, LG, Samsung. Thuong bao hanh khong-pixel-chet tren cac man hinh premium; bat ky pixel chet nao trong 30 ngay la mot tra lai. Man hinh nguoi tieu dung gia thap thuong yeu cau 3 hoac nhieu pixel chet trong mot vung duoc chi dinh truoc khi chap nhan mot tra lai.

Apple Studio Display, Pro Display XDR. Bat ky pixel loi nao la can cu doi trong cua so tra lai 14 ngay.

Amazon, Best Buy, nha ban le lon. Chinh sach cua ho thuong de chiu hon bao hanh cua nha san xuat - mot loi pixel chet trong cua so tra lai cua nha ban le (thuong 30 ngay) duoc chap nhan voi bang chung.


Tai lieu giup viec tra lai duoc thong qua

Neu viec tra lai bi tranh chap hoac di den xem xet bao hanh, co tai lieu tiet kiem thoi gian:

  • Anh dien thoai cua moi loi. Can canh voi truong mau tiet lo loi thay duoc.
  • Screenshot co dau thoi gian cua LCD test chay o che do toan man hinh (hau het nha ban le chap nhan cai nay nhu bang chung rang bai kiem tra da duoc thuc hien).
  • So serial cua man hinh (thuong tren mot mieng dan o mat sau).
  • Bien lai mua hang voi ngay mua.

Neu ban tim thay mot loi that: duong di tra lai

Lien lac nha ban le truoc; quy trinh tra lai cua ho thuong don gian hon bao hanh nha san xuat. Hau het nha ban le xu ly mot tra lai trong 48 gio neu loi duoc xac minh trong bang chung kiem tra. Neu cua so tra lai cua nha ban le da qua nhung ban van trong bao hanh nha san xuat (thuong 12-36 thang), leo thang den nha san xuat voi cung bo bang chung.


Neu ban tim thay mot pixel ket: thu go ket truoc

Truoc khi chap nhan rang mot pixel ket la vinh vien, thu ky thuat "massage pixel": mot mieng vai microfiber am, ap luc nhe truc tiep len pixel ket trong 5-10 giay, lap lai vai lan. Khac, chay mot mau cycle pixel trong 6-24 gio (nhap nhay mau nhanh tai vi tri pixel ket thuong xoa dong tinh the long). Ti le sua co the la 30-40% - dang thu truoc khi bat dau mot tra lai neu ban da qua cua so tra lai de.


Cong cu lien quan


← Quay lai Cong Cu Kiem Tra Thiet Bi

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