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Kiem tra LCD vs kiem tra display vs kiem tra monitor - ban thuc su can cai nao?

Cap nhat lan cuoi 2026-05-03. Ba thuat ngu, ba bo kiem tra khac nhau. Mot kiem tra LCD nhin vao chinh tam nen - pixel chet / ket cung, do dong deu mau, burn-in. Mot kiem tra display them duong di tin hieu - cap, handshake EDID, dam phan tan so quet. Mot kiem tra monitor di rong hon nua - cong, hub USB, loa tich hop, OSD, scaling. Huong dan nay neu ten cai gi moi kiem tra thuc su kiem tra, khi nao moi cai la diem khoi dau dung, va lien ket cong cu chay chan doan dung.

Cau tra loi trong 30 giay. Neu mot pixel khong doi mau hoac khong tat, chay mot kiem tra LCD - mot chu trinh mau toan man hinh phoi bay pixel chet / ket cung va do dong deu. Neu hinh nhap nhay, rot, hoac chay o tan so quet sai, do la van de display (duong di tin hieu, cap, EDID) va kiem tra LCD se khong bat. Neu mot cong khong sang, loa im, hoac OSD khong mo, do la van de monitor (cong / firmware / phan cung quanh tam nen). Khop trieu chung voi kiem tra dung, giu mau bao hanh cho kiem tra that bai.

Kiem tra LCD thuc su kiem tra gi

Kiem tra LCD la chan doan cap tam nen. Trinh doc dien man hinh voi mot mau dac moi luc (do, xanh la, xanh duong, trang, den, doi khi mot gradient) va nhin cac pixel. Diem la phoi bay loi cua chinh tam nen - lop cua te bao tinh the long va bo loc mau truoc den nen. Pixel chet van den tren moi mau. Pixel ket cung bi khoa o mot trong do/xanh la/xanh duong. Loi do dong deu mau xuat hien nhu cac mang sang hoac toi hon mot chut so voi phan con lai. Ro ri den nen xuat hien tren truong den nhu sang goc. Burn-in (luu hinh) xuat hien nhu bong ma mo cua hinh anh truoc tren truong phang.

Kiem tra LCD khong kiem tra cap, dau ra GPU, tan so quet, scaler, cong, hoac OSD. No gia su hinh dang den tam nen dung va hoi mot cau hoi: cac pixel cua chinh tam nen co on khong? Day la ly do huong dan dong hanh hien co Bai kiem tra LCD thuc su kiem tra gi di qua moi mau hinh va loi nao no co the tiet lo.

Kiem tra display them gi

Kiem tra display rong hon: bao tru cac kiem tra tam nen tren VA duong di tin hieu giao hinh den tam nen. Duong di tin hieu bao gom cap (HDMI / DisplayPort / USB-C / VGA), handshake EDID (man hinh noi voi GPU no ho tro nhung do phan giai va tan so quet nao), dam phan bang thong (4K@120 can DisplayPort 1.4 hoac HDMI 2.1; 4K@60 vua trong HDMI 2.0), va timing/genlock giua GPU va tam nen.

Trieu chung kiem tra display bat ma kiem tra LCD bo lo: nhap nhay ngau nhien, blackout tuc thoi khi GPU chuyen tan so quet, mot thong bao "khong tin hieu" den di, do phan giai goc sai duoc cung cap, HDR khong kich hoat, tan so quet bi gioi han thap hon spec tam nen. Mot van de display thuong ton tai qua nhieu PC - doi cap de kiem tra, doi PC nguon de xac nhan; neu trieu chung di chuyen voi cap, cap la nguyen nhan; neu di chuyen voi PC nguon, nguon la nguyen nhan.

Kiem tra monitor them gi tren cung

Kiem tra monitor la rong nhat trong ba. Bao tru tam nen va duong di tin hieu, cong moi thu khac hop lam: moi cong (moi HDMI, moi DisplayPort, USB-C voi che do DP-Alt, USB-A pass-through, dau ra am thanh), loa tich hop, menu hien thi tren man (OSD) va cac nut, firmware (menu treo, mat cai dat khi tat may), hanh vi scaling (1080p dau vao render dung tren tam nen 4K), tinh nang picture-in-picture / picture-by-picture, cam bien tu xoay, va bat ky cam bien anh sang moi truong nao.

Trieu chung chi co kiem tra monitor bat: mot cong USB-C giao hinh nhung khong cap nguon, mot hub USB ngat cu nam phut mot lan, loa keu o tan so nao do, mot nut OSD khong phan hoi, scaling cat hinh thay vi vua. Cac thu nay khong lien quan gi den tam nen; kiem tra LCD tren monitor co hub USB hong se pass sach vi tam nen on.

Cay quyet dinh 30 giay

Chon kiem tra tu noi loi thuc su o do - tam nen, duong di tin hieu, hoac hop. Doc bon hang ben duoi nhu "neu ban thay X tren man hinh, that bai o lop Y, vi vay kiem tra dung la Z":

  1. Loi muc pixel (cham chet, pixel ket cung mau, mang mau khong deu, bong ma burn-in tren truong phang) → chay kiem tra LCD. Chu trinh mau toan man hinh phoi bay loi tam nen trong duoi hai phut.
  2. Loi muc hinh (nhap nhay, blackout, "khong tin hieu" thinh thoang, do phan giai sai cung cap, HDR khong kich hoat) → day la van de display/tin hieu. Doi cap truoc, sau do PC nguon. Kiem tra LCD se pass ngay ca khi duong di tin hieu hong.
  3. Loi muc hop (mot cong chet, hub USB rot, OSD khong mo, loa khong choi, scaling sai) → day la van de monitor/firmware. Kiem tra cong thu cong; kiem tra LCD khong the thay cong.
  4. Khong chac loi o dau → bat dau voi kiem tra LCD du sao. No la cai nhanh nhat trong ba de chay, no loai tru loi dat tien nhat (tra tam nen), va cac mau hinh cung tiet lo mot so van de duong di tin hieu (mot cap nhap nhay xuat hien nhu mot dai mau nhap nhay tren cac man hinh mau dac).

Cac cau hoi thuong gap

"Kiem tra man hinh" co giong "kiem tra LCD" khong?

"Kiem tra man hinh" la mot thuat ngu chung ma cac nguon khac nhau dung de chi bat ky cai nao trong ba. Mot so trang dung de chi kiem tra tam nen (= kiem tra LCD); mot so dung de chi kiem tra tin hieu/hinh (= kiem tra display); mot so coi nhu dong nghia voi kiem tra monitor. Doc trang truoc - neu no cycle mau dac, do la kiem tra tam nen/LCD; neu no hoi ve cap va do phan giai, do la kiem tra display; neu no hoi ve cong va OSD, do la kiem tra monitor. Huong dan dong hanh huong dan kiem tra pixel chet di qua cac mau hinh cap tam nen chi tiet hon.

Kiem tra LCD co bat duoc cap xau khong?

Doi khi. Mot cap hong thuong xuat hien duoi dang dai ngang min hoac vu nhap nhay ngan tren truong mau dac, dac biet do va xanh duong (cac mau tin hieu bang thong cao nhat). Nhung mot tam nen sach hoan toan van co the co mot cap can bien giam 4K@120 xuong 4K@60; kiem tra LCD se khong bat duoc do vi chinh hinh thi on. Neu kiem tra LCD pass nhung ban van thay van de hinh, doi cap va kiem tra lai.

Toi sap tra monitor bao hanh - chay kiem tra nao?

Chay ca ba. Hau het cac yeu cau bao hanh dua vao loi pixel duoc tai lieu hoa (kiem tra LCD) - cac nha san xuat dem pixel chet/ket cung dua tren nguong cong bo (vi du ISO 9241-307 Lop II cho phep N pixel loi tren trieu tuy theo loai). Nhung tai lieu hoa cac kiem tra muc tin hieu va muc hop cung: tra "DOA" cho cong khong cap nguon nhanh hon tra do loi pixel tren cung mot monitor. Huong dan dong hanh: cach kiem tra pixel chet truoc khi tra monitor.

Vi sao pixel cua toi trong chet tren trang nhung on tren den?

Mot pixel van toi tren truong trang la subpixel "chet" - mot trong cac te bao do/xanh la/xanh duong trong pixel do vinh vien tat. Mot pixel sang tren truong den la subpixel "ket cung" - mot te bao vinh vien bat. Ca hai la loi tam nen kiem tra LCD phoi bay; khong cai nao lien quan den cap, PC nguon, hoac cong.

Moi kiem tra nen mat bao lau?

Kiem tra LCD: khoang hai phut (sau man hinh mau, ~20 giay moi cai, them mot gradient cham). Kiem tra display: muoi den muoi lam phut neu ban doi cap va PC nguon. Kiem tra monitor: ba muoi phut hoac hon neu ban thuc thi moi cong, moi cai dat OSD, va moi nguon dau vao. Chay theo thu tu do de khong ton mot gio cho kiem tra cong cho mot tam nen cuoi cung hoa ra bi loi.

Lien quan

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