Bai kiem tra LCD thuc su kiem tra gi
Doi ngu Bien tap Free Tool OnlineCap nhat lan cuoi: 2026-05-10
Mot bai kiem tra LCD truc tuyen - doi khi duoc dat nhan kiem tra man hinh, kiem tra display hoac kiem tra monitor - la mot chuoi cac dien day mau va mau hinh toan man hinh giup phat hien cac loi ban khong the thay khi su dung binh thuong. Bai kiem tra chay trong trinh duyet o do phan giai day du; ban quan sat man hinh va tim cac diem khong khop voi mau mong doi. Huong dan nay giai thich moi kiem tra dang thu gi, ket qua co y nghia gi, va khi nao chay bai kiem tra dang gia thoi gian cua ban.
Bon thu ma mot bai kiem tra LCD that su kiem tra
1. Pixel chet. Mot pixel chet la mot diem duy nhat tren man hinh khong con sang nua. Tren nen den no vo hinh (moi thu da la den); tren nen do, xanh la, xanh duong hoac trang dac no xuat hien nhu mot cham toi nho. Cac tam nen LCD va OLED hien dai co hang trieu pixel - mot man hinh 1080p co 2.073.600. Mot hoac hai pixel chet o goc la pho bien va hiem khi du dieu kien bao hanh tu chung; cum hoac pixel chet o trung tam man hinh thuong du dieu kien. Chay LCD Test, cycle qua cac bai kiem tra toan man hinh trang, do, xanh la va xanh duong, va kiem tra moi cai can than.
2. Pixel ket cung. Mot pixel ket cung sang vinh vien o mot mau (thuong la do, xanh la hoac xanh duong), bat ke cai gi nen hien thi tren man hinh. Tren bai kiem tra trang no xuat hien nhu mot cham co mau; tren bai kiem tra mau khop no bien mat. Pixel ket cung doi khi co the phuc hoi voi mot "may tap pixel" - mot mau hinh cycle nhanh stress te bao - ma cac chuoi kiem tra LCD dai hon bao gom. Neu mot pixel ket cung song sot 30 phut cua mau hinh may tap, gan nhu chac chan la mot loi phan cung.
3. Do dong deu mau / banding / bui ban. Khi ban nhin vao mot mau do, xanh la hoac xanh duong hoan toan dac, toan bo man hinh nen dong deu mau do. Ket qua thuc te: ro ri den nen (mang sang hon gan canh), "vignette" tam nen VA (goc toi hon trung tam), bui tam nen hoac dau ngon tay chi xuat hien tren mau dac. Khong cai nao tu vong; van de do dong deu la phat hien chat luong display chu khong phai trigger bao hanh (tru khi do lech nghiem trong).
4. Burn-in / luu hinh (chi OLED). Neu man hinh la OLED (hau het dien thoai moi, mot so monitor, tat ca Apple Watch hien tai va nhieu TV cao cap), viec hien thi lap di lap lai dai noi dung tinh co the de lai mot bong ma mo. Kiem tra la bai kiem tra xam toan man hinh - bat ky bong ma nhin thay nao cua menu, taskbar hoac phan tu UI la luu hinh, va luu hinh ton tai lau la burn-in. LCD ve mat ky thuat khong burn-in (den nen dong deu), nen tren mot LCD thong thuong kiem tra nay la no-op.
Cach chay bai kiem tra trong 30 giay
Buoc 1. Mo LCD Test tren thiet bi co man hinh ban muon kiem tra. Mo trang tren chinh man hinh - kiem tra man hinh dien thoai voi man hinh laptop khong cho ban biet gi ve dien thoai.
Buoc 2. Nhap nut mau hinh kiem tra (thuong duoc dat nhan voi ten mau hoac mau hinh). Trinh duyet dien toan man hinh voi mau hinh do.
Buoc 3. Nhin gan moi vung cua man hinh. Di chuyen mat co he thong: goc tren ben trai, canh tren, goc tren ben phai, canh phai, vv. Dung mot khan sach de lau dau ngon tay truoc - chung trong giong het pixel ket cung.
Buoc 4. Nhan Esc hoac nhap lai de thoat khoi mau hinh toan man hinh. Lap lai cho moi bai kiem tra ma cong cu cung cap (trang, den, do, xanh la, xanh duong, xam la bo tieu chuan).
Y nghia cua ket qua
| Cai ban thay | Cai do la gi | Hanh dong |
|---|---|---|
| Mot hoac hai cham toi chi tren do/xanh la/xanh duong/trang | Pixel chet | Tai lieu hoa voi anh man hinh + mau hinh kiem tra; kiem tra nguong loi da pixel cua bao hanh |
| Mot hoac hai cham co mau bien mat tren bai kiem tra mau khop | Pixel ket cung | Chay may tap pixel (mau hinh cycle) 30-60 phut; neu cham ton tai, tai lieu hoa cho bao hanh |
| Mang sang hon gan canh tren den dac | Ro ri den nen | Tham my; hiem khi du dieu kien bao hanh tru khi nghiem trong |
| Goc toi hon ro rang so voi trung tam tren mau dac | Vignette tam nen (tam nen VA) | Binh thuong cho cong nghe VA; khong phai loi |
| Bong ma mo cua menu hoac UI tren bai kiem tra xam (OLED) | Luu hinh | Chay screen saver / mau hinh dich pixel de phuc hoi; bong ma ton tai = burn-in |
| Cac duong doc hoac ngang tren bat ky mau dac nao | Loi IC driver tam nen | Loi phan cung; truong hop bao hanh |
| Nhap nhay tren mau dac | Cap long, tam nen hong hoac card video xau | Thu cap khac; neu ton tai, tai lieu hoa va kiem tra |
Khi nao chay mot bai kiem tra LCD
Truoc khi tra man hinh cho bao hanh. Hau het cac chinh sach bao hanh dinh nghia nguong pixel chet ve so dem va vi tri (vi du "5 pixel chet tro len" hoac "2 pixel chet tro len trong vung xem trung tam"). Khong co mau hinh kiem tra ban khong the dem chung dang tin cay; voi bai kiem tra, ban co the tai lieu hoa moi loi va gui mot truong hop RMA sach. Chay bai kiem tra, chup screenshot hoac anh cho moi mau hinh mau, va bao gom chung trong viec gui bao hanh.
Truoc khi mua mot monitor da qua su dung. Nguoi ban co the khang dinh man hinh tot; mot bai kiem tra LCD 30 giay se lam noi bat bat ky nhom pixel chet nao, ro ri den nen nghiem trong hoac vignette tam nen. Re hon de chay truoc khi tra tien hon la xu ly mot vu tra hang sau do.
Sau khi giai nen mot man hinh moi. Cac tam nen hien dai den voi QC nghiem ngat theo lo, nhung ngay ca cac loi mot-trong-mot-ngan cung thoat. Trong cua so chinh sach tra hang (thuong 14-30 ngay) la khoanh khac de tim chung.
Sau khi danh roi dien thoai. Mot lan roi co the lam nut tam nen ben trong ma khong co nut ben ngoai nhin thay; bai kiem tra LCD tiet lo cac duong chet hoac vung chet lon ngay lap tuc.
Sau mot khoang dai lam viec. Met moi mat co the lam pixel ket cung hoac chet mo di vao nen. Chay bai kiem tra vao mot dau ngay tuoi se mang ra anh sang nhung thu ban se bo lo.
Cai gi mot bai kiem tra LCD KHONG kiem tra
Trung thuc ve pham vi - mot bai kiem tra trong trinh duyet bi gioi han boi cai gi JavaScript co the ve tren mot canvas. No khong do:
Do chinh xac mau - dieu do doi hoi mot may do mau (Spyder, ColorMunki, X-Rite). Bai kiem tra dien voi cac mau co ban sRGB; no khong the noi liec tam nen cua ban render chung trong Delta-E 3.
Do dong deu do sang theo candela - cung ly do; can mot may do luminance.
Do on dinh cua tan so quet - JavaScript chay theo nhip animation cua trinh duyet, khong theo tan so quet thuc cua display. Dung cong cu nhu testufo.com cho cac bai kiem tra cu the ve tan so quet.
Do tre dau vao - doi hoi timing phan cung (camera toc do cao + tin hieu tham chieu). Bai kiem tra trinh duyet chay theo nhip frame cua HDH, che giau do tre display.
Cho cac kiem tra hang ngay "toi co pixel chet khong, tam nen co nguyen ven khong", bai kiem tra trinh duyet la cong cu dung. Cho hieu chinh muc chuyen nghiep hoac dieu chinh do tre cho game canh tranh, ban can phan cung chuyen dung.
Man hinh dien thoai vs man hinh laptop vs monitor ngoai
Cac mau dien tuong tu hoat dong tren ca ba, nhung khac biet thuc te:
Man hinh dien thoai thuong la OLED (dac biet tren iPhone tu X va tren hau het flagship Android tu 2018). Kiem tra cu the OLED ve burn-in / luu hinh quan trong o day. Man hinh dien thoai cung co goc bo tron va vung notch / cutout; pixel chet gan ban kinh thuong khong du dieu kien bao hanh.
Man hinh laptop thuong la IPS LCD. Ro ri den nen o canh la van de tham my pho bien nhat; cum pixel chet o vung trung tam la trigger bao hanh pho bien nhat. Mo bai kiem tra trong che do toan man hinh trinh duyet (F11 tren hau het trinh duyet) de taskbar HDH khong che hang duoi.
Monitor ngoai thuong co chinh sach pixel nghiem ngat hon. Cac thuong hieu cao cap doi khi cung cap bao dam khong pixel chet; tam nen dong gia re thuong cho phep den 5 pixel chet truoc khi bao hanh kich hoat. Kiem tra chinh xac chinh sach pixel cua thuong hieu truoc khi gui RMA.
Tom tat nhanh
1. Mot bai kiem tra LCD tiet lo pixel chet, pixel ket cung, van de do dong deu mau va (tren OLED) burn-in.
2. Chay LCD Test, cycle qua moi mau hinh mau dac va kiem tra moi vung.
3. Tai lieu hoa bat ky loi nao voi anh truoc khi lien he nha san xuat de bao hanh.
4. Bai kiem tra trinh duyet KHONG do do chinh xac mau, do sang theo candela, do on dinh tan so quet hoac do tre dau vao - nhung cai do can phan cung chuyen dung.
Cong cu va huong dan lien quan
- LCD Test - cong cu ma huong dan nay di qua.
- Camera Test - kiem tra webcam hoac camera dien thoai trong trinh duyet.
- Microphone Test - kiem tra muc dau vao va san tieng on.
- Keyboard Test - xac minh N-key rollover va phim ket cung.
- Device Test Tools - trung tam day du cac trang kiem tra thiet bi.
- Huong dan kiem tra pixel chet - huong dan dong hanh tap trung vao chi tiet chinh sach pixel chet.
- Danh sach kiem tra thiet bi cho lam viec tu xa - chuoi 60 giay truoc cuoc hop.
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