Cach kiem tra man hinh cam ung tim diem chet
Soat lai lan cuoi 2026-05-05. Phan thi giac cua kiem tra man hinh (pixel chet, dong nhat mau, ro ri den nen) chay tai LCD Test; phan cam ung la dieu huong dan nay bao quat - ca hai chay trong trinh duyet, ca hai hoan thanh trong duoi mot phut tren mot thiet bi hoat dong.
Tai sao "kiem tra man hinh" va "kiem tra cam ung" khong phai la kiem tra giong nhau
Mot "kiem tra man hinh" hoac "kiem tra pixel chet" dien hinh - bao gom LCD Test tren trang nay - cycle mau toan man hinh de ban co the phat hien pixel khong thay doi. Kiem tra do la ve lop hien thi: ma tran LCD hoac OLED tao ra anh sang. No khong noi gi ve viec lop cam ung (digitizer ngoi tren lop hien thi) co dang doc ngon tay cua ban hay khong.
Hai lop loi doc lap. Mot dien thoai co the co man hinh hoan toan sach voi goc cam ung chet; mot man hinh co the co mot pixel ket va luoi cam ung hoan hao. Neu trieu chung cua ban la "man hinh nhin on nhung cham vao goc duoi-trai khong lam gi", ban can kiem tra cam ung, khong phai cycle pixel.
Cach kiem tra phan hoi cam ung tren bat ky trinh duyet nao (khong cai dat)
Ban khong can app kiem tra man hinh cam ung. Ba phuong phap chi-trinh-duyet hoat dong tren man hinh cam ung dien thoai, tablet va laptop.
- Keo-ran tren mot trang trong. Mo mot tab trinh duyet moi, dieu huong toi mot trang trong hoac noi dung thap (thanh dia chi voi
about:blankhoat dong tren hau het trinh duyet), va keo dau ngon tay theo mau ran: khap canh tren, xuong mot hang, di tro lai, xuong mot hang, cho den khi ban bao quat toan bo be mat. Bat ky vung nao noi highlight hoac con tro dung phan hoi la diem chet. Day la kiem tra chi-trinh-duyet dang tin cay nhat tren dien thoai va tablet. - Be mat ve tren man hinh. Mot canvas ve bang cham (bat ky pad ve trong trinh duyet mien phi - tim "ve truc tuyen" neu khong co cai nao danh dau) cho phep ban ve duong. Ve cac duong thang ngang va doc tu canh den canh. Mot duong gay o cung toa do moi lan la mot vung chet; mot duong dao dong nhung phuc hoi thuong la van de dau van tay hoac am, khong phai loi phan cung.
- Kiem tra multi-touch. Neu thiet bi cua ban ho tro gestures hai ngon tay, pinch-to-zoom tren mot hinh anh. Mot thiet bi chi dang ky mot ngon tay khi ban dat hai co van de digitizer hoac driver, khong phai van de kinh.
Chay ca ba theo thu tu tren cung mot thiet bi. Cai dau tien tim cac vung chet lon; cai thu hai tim cac dai hep; cai thu ba tim cac loi ben digitizer ma hai cai dau tien bo lo.
Doc mau loi
Hinh dang cua vung chet la dau hieu manh nhat cho nguyen nhan. Mot vai mau thong dung va y nghia cua moi mau:
| Mau | Trong nhu the nao | Nguyen nhan thong dung nhat |
|---|---|---|
| Mot goc chet | Mot vung vuong hoac tam giac trong mot goc dung phan hoi | Vet nut kinh gan goc, hoac connector digitizer da long; lich su va dap vat ly la dau hieu manh |
| Mot canh chet | Mot dai 5-15 mm doc theo mot canh man hinh khong phan hoi | Ap luc khung vien (case qua chat), pin phong day man hinh tu duoi, hoac hu hong cap digitizer do roi |
| Dai doc hoac ngang khap man hinh | Mot dai N pixel rong dung phan hoi, xa moi canh | Mot hang hoac cot tren luoi digitizer da mat ket noi - thuong la loi cap flex ben trong assembly hien thi |
| Vung day du chet | Khong phan nao cua man hinh phan hoi, nhung man hinh van hien thi hinh anh dung | Cap digitizer hoan toan ngat, driver bi tat o cap OS, hoac van de quan ly nguon (thu hard reboot truoc khi gia dinh phan cung) |
| Cham ma ngau nhien | Con tro nhay den mot toa do co dinh ngay ca khi ban khong cham vao man hinh | Am hoac mo tren man hinh, lop kinh bi hong, hoac sac loi bom nhieu dien (thu sac khac) |
| Loi chi-canh trong gestures cu the | Vuot canh khong dang ky, nhung cham trong cung vung lai dang ky | Xung dot gesture "edge swipe" cap OS - tat gesture Recent Apps / dao tao back-gesture trong cai dat OS truoc khi gia dinh phan cung |
Y nghia cua moi mau (chan doan sau hon)
Truoc khi gia dinh hu hong phan cung, loai bo cac giai thich re hon theo thu tu:
- Tiep xuc be mat va da. Man hinh cam ung dien dung doc lop dan dien cua da ban. Da kho mua dong, ngon tay nhon, mieng dan man hinh qua day, hoac mot lop bui co the gay doc khong on dinh. Lau man hinh bang khan microfiber kho va thu lai voi ngon tay sach, hoi am.
- Drift calibration cap OS. Tren laptop voi Windows hoac tablet cu hon, calibration cam ung drift sau cac ban cap nhat lon. Tren Windows: Settings → Devices → Pen & Touch → Calibrate. Tren Android: hiem khi co cong cu calibration nguoi dung co the tiep can, nhung factory reset xoa hau het calibration drift.
- Nhieu sac. Mot sac khong-goc hoac bi hong co the bom nhieu dien gay nhau lan digitizer. Neu van de cam ung chi xuat hien khi cam sac, doi sac hoac thu kiem tra chi-pin.
- Ap luc case. Mot case quan vien (dac biet sau khi roi) co the an cap flex digitizer long. Thao case ra va kiem tra lai truoc khi gia dinh man hinh can thay the.
- Pin phong. Pin phong la van de an toan nghiem trong. Neu mat sau cua thiet bi dang phong len, dung su dung va lien lac nha san xuat hoac cua hang sua chua. Pin phong day man hinh tu duoi va ngat digitizer.
- Loi cap digitizer. Neu ban da loai bo da, calibration, sac, case va pin, loi cap digitizer la nguyen nhan con lai co kha nang cao nhat. Day la sua o cua hang sua chua, khong phai sua cua nguoi dung - thay digitizer co nghia la nang assembly man hinh, dieu nay vo hieu hau het bao hanh neu lam tai nha.
Khi nao dung kiem tra va goi bao hanh / sua chua
Hai-trong-ba cua nhung tin hieu nay co nghia la dung kiem tra va bat dau quy trinh bao hanh hoac sua chua - kiem tra them rui ro lam trieu chung te hon:
- Vung chet dang phat trien. Mot loi bao quat mot goc tuan truoc va bay gio bao quat hai goc dang lan; su dung them gia toc su lan rong (dac biet voi hu hong nut cho phep am vao).
- Phan cung khac cung dang loi. Neu vung-cam-ung-chet di kem voi reboot ngau nhien, van de sac, hoac pin phong, loi co kha nang la loi phan cung cap he thong ma chi kiem tra cam ung khong the chan doan.
- Ban co the thay hu hong vat ly. Vet nut kinh thay duoc, vien tach roi, hoac am duoi man hinh deu can cua hang sua chua, khong phai chan doan phan mem.
Ghi lai vung chet truoc khi ban giao thiet bi: chup screenshot mau loi (dung to hop phim screenshot tich hop ngay ca khi cam ung chet - power+volume tren hau het dien thoai, PrtScn tren hau het laptop), ghi video 10 giay cua keo-ran that bai, va viet mot ghi chu ngan (ngay, lich su roi, hu hong thay duoc, phien ban OS). Cua hang sua chua va quy trinh bao hanh di nhanh hon khi ban den voi bang chung thay vi mo ta bang loi.
Ket hop kiem tra cam ung voi kiem tra thi giac
Neu ban phat hien vung cam ung chet, cung chay kiem tra thi giac. Mot thiet bi voi goc cam ung chet thuong co vet nut nho khong nhin thay bang mat thuong, va vet nut do thuong xuat hien nhu pixel ket tren cac mau toan man hinh truoc khi xuat hien nhu mot vet nut thay duoc. Chay LCD Test sau kiem tra cam ung; neu ban thay mot hoac nhieu pixel ket trong cung vung voi vung cam ung chet, nguyen nhan goc gan nhu chac chan la hu hong vat ly cua tam, khong phai chi digitizer.
Cho phan loai pixel chet va nguong bao hanh hau het nha san xuat ap dung (bao nhieu pixel chet ho se thay man hinh), doc Huong dan kiem tra pixel chet sau khi kiem tra thi giac hoan tat.
Cac cau hoi thuong gap
Huong dan nay co hoat dong tren man hinh khong-cam-ung khong?
Khong. Man hinh khong-cam-ung co lop hien thi nhung khong co digitizer; khong co gi de kiem tra. Chay kiem tra thi giac tai LCD Test cho cac man hinh do.
Toi co can app dac biet de kiem tra man hinh cam ung khong?
Khong. Keo-ran chi-trinh-duyet cong voi pad ve tren man hinh bao quat ~95% loi man hinh cam ung. App them quet luoi tu dong va duong cong ap luc nhung hiem khi thay doi chan doan.
Man hinh cam ung cua toi hoat dong nhung cam giac "cham" - do co phai loi phan cung khong?
Thuong la khong. Lag cam ung thuong la cuong tac CPU hoac GPU (app nen, luu tru thap) hon la loi digitizer. Khoi dong lai thiet bi, dong tat ca app nen, va kiem tra lai truoc khi gia dinh phan cung. Neu lag van con qua reboot sach, firmware digitizer co the can ban cap nhat tu nha cung cap.
Mieng dan man hinh co the gay diem chet khong?
Co - dac biet mieng dan kinh cuong luc khong duoc dat dung. Neu ban co the thay bong khi hoac nang doc theo canh, thao mieng dan va kiem tra lai. Mieng dan kinh cuong luc qua day (tren ~0,4 mm) cung co the chan cham tai canh tren mot so thiet bi.
Neu kiem tra qua hom nay nhung vung cam giac chet hom qua thi sao?
Diem chet ngat quang thuong la dau hieu cua loi cap digitizer mot phan hoac xam nhap am. Lap lai kiem tra lanh (sau khi thiet bi ngoi mot gio khong sac) va am (sau khi gaming hoac cuoc goi video dai). Mot loi tai san xuat trong chi mot trang thai nhiet van can sua, nhung ghi lai trigger toc do cuoc tro chuyen bao hanh.
Kiem tra man hinh cam ung co ghi du lieu nao khong?
Khong. Cac phuong phap chi-trinh-duyet trong huong dan nay doc input cam ung va render phan hoi thay duoc (mot highlight con tro, mot duong ve); chung khong ghi, truyen, hoac luu tru gi. Bat cu thu gi ban kiem tra deu o tren thiet bi.
Lien quan
- LCD Test - phan thi giac / pixel cua kiem tra man hinh hoan chinh (cycle mau toan man hinh cho pixel chet, ket va co kha nang ro ri). Ket hop voi kiem tra cam ung o tren cho chan doan man hinh hoan chinh.
- Huong dan kiem tra pixel chet - phan loai chet-vs-ket-vs-nong va nguong tra ve bao hanh ma hau het nha san xuat ap dung.
- Kiem tra man hinh vs kiem tra camera - chon cong cu dung - huong dan dieu phoi dong hanh neu ban den day tu "kiem tra man hinh cua toi" nhung thuc su muon kiem tra webcam.
- Danh sach kiem tra thiet bi cho lam viec tu xa - thoi quen tai dien gop kiem tra man hinh, cam ung, mic, webcam va ban phim thanh mot lan quet 90 giay.
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