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Kiem Tra LED vs Kiem Tra LCD: Cai Nao Ap Dung Cho Man Hinh Cua Ban?

Cap nhat lan cuoi 2026-05-05. Hai trong so cac truy van kiem tra man hinh hay duoc go nhat la "kiem tra LED" va "kiem tra LCD" - va chung gan nhu luon nghia cung mot phan cung. LED la cong nghe den nen chieu sang panel tu phia sau; LCD chinh la panel, lop chua pixel. Tren moi laptop, monitor, dien thoai, va TV ban tu khoang 2009, man hinh la panel LCD voi den nen LED. Chay cung chu ky mau toan man hinh va cung quet pixel chet tren bat ky cai nao - bai kiem tra khong doi. Man hinh duy nhat ma cau tra loi khac la OLED, khong co den nen tach roi. Mo bai kiem tra LCD ben canh huong dan nay va cau hoi duoc giai quyet trong duoi mot phut.

Cau tra loi trong 30 giay. Neu truy van tim kiem cua ban la "kiem tra LED", "test LED online", "kiem tra LCD", "check LCD" hoac "kiem tra LCD", cung mot cong cu trinh duyet tra loi ca nam - bai kiem tra LCD. Chu ky mau toan man hinh (do, xanh la, xanh duong, den, trang, vang) phoi bay pixel chet, pixel ket, ro sang vien, va loi do dong nhat mau tren bat ky panel LCD nao bat ke den nen la LED hay CCFL cu hon. Man hinh duy nhat bai kiem tra hanh xu khac la OLED, noi ro sang vien khong the xay ra (moi pixel tu phat sang) va check burn-in / luu giu hinh anh quan trong hon.

LED la den nen; LCD la panel

Hai ten goi mo ta hai lop khac nhau cua cung mot man hinh, khong phai hai man hinh khac nhau. LCD - liquid-crystal display - la lop chua pixel: mot lop mong tinh the long xoay (hoac khong xoay) de chan hoac cho qua anh sang. Pixel khong tu thay gi; no la mot ngat. De LCD nhin thay duoc, panel can mot nguon sang phia sau. Nguon sang do la den nen.

Trong phan lon nhung nam 2000, den nen la mot ong CCFL (cold-cathode fluorescent lamp), cung cong nghe duoc dung cho den van phong thoi do. Khoang 2009, cac nha san xuat thay ong bang mot dai LED (light-emitting diodes) doc canh panel hoac phia sau no nhu mot mang. Cac man hinh moi mong hon, dung it dien hon, va nhan marketing "TV LED" hoac "monitor LED" ra doi. Panel khong doi - van la LCD. Chi den nen doi. Vay nen khi spec sheet cua nha san xuat noi "display LED", co nghia "panel LCD voi den nen LED"; lop LCD van lam viec voi pixel.

Do la nguon nham lan cua tu khoa tim kiem. Mot doc gia go "kiem tra LED" hau nhu luon dang tim mot bai kiem tra cua man hinh LCD den nen LED - laptop, monitor, hoac TV tieu chuan. Mot doc gia go "kiem tra LCD" tim mot bai kiem tra cua cung phan cung, chi goi ten lop pixel thay vi nguon sang. Ca hai den cung mot trang vi ca hai cau hoi co cung cau tra loi.

Bai kiem tra tra loi ca hai ten goi

Chu ky mau toan man hinh la quet loi chinh thuc cho bat ky panel LCD nao, va no khong quan tam den nen lam tu gi. Di qua do, xanh la, xanh duong, den, trang, vang dac toan man hinh phoi bay bon loai loi ma panel co the co:

  • Pixel chet. Mot pixel luon hien den (hoac mot mau ket) bat ke slide nao dang hien. ISO 9241-307 goi day la loi class-I - loai ma nha san xuat thay duoi bao hanh tren mot nguong theo do phan giai. De thay nhat tren slide trang.
  • Pixel ket. Mot pixel khoa o do, xanh la, hoac xanh duong. Thay duoc nhu mot diem mau don le tren slide mau doi lap (mot pixel do ket noi bat tren slide xanh la va xanh duong).
  • Ro sang vien (chi LCD). Manh sang hon gan canh panel hien qua tren slide den. Gay ra boi ap luc khong deu tren lop LCD hoac chum mang LED o vien. Chi thay tren slide den; slide trang an di.
  • Do dong nhat mau. Tinh te thay doi tone mau hoac vignette tu mot goc panel sang goc doi dien. De thay nhat tren mot xam trung dac, nhung cac slide do / xanh la / xanh duong cung phoi bay troi nhiet do mau lon giua cac vung.

Khong cai nao trong nhung loi nay la "chi LED". Khong cai nao la "chi LCD". Chung la loi panel, va cung chu ky mau tim ra chung bat ke den nen la LED, CCFL, hay mot dai LED chuyen thanh cac vung mini-LED (cac display "QLED" / "mini-LED" cao cap cua nhung nam 2020). Cho muc dich cua doc gia - "man hinh cua toi hong hay mat toi lua minh?" - chay bai kiem tra giai quyet trong duoi mot phut.

OLED la truong hop duy nhat bai kiem tra doi

Mot panel OLED (organic light-emitting diode) la mot loi phan cung khac: moi pixel la LED rieng cua no, va khong co den nen tach roi. Dieu do co hai he qua cho bai kiem tra:

  1. Ro sang vien khong the xay ra tren OLED. Khong co den nen, khong co gi de ro qua lop LCD. Mot slide den tren mot man hinh OLED khoe manh la den that su tren toan panel. Neu ban thay bien dong sang tren slide den cua OLED, nguyen nhan la khong dong nhat panel (pixel cu the phat sang o do sang khac nhau chut), khong phai ro.
  2. Burn-in / luu giu hinh anh la mode loi dac trung cua OLED. Khi pixel OLED cua mot mau bi day cao trong thoi gian dai (mot logo tinh, mot thanh trang thai, mot HUD game), nhung subpixel do gia di nhanh hon va phat ra it anh sang hon hang xom. Ket qua hien ra nhu mot bong mo cua phan tinh tren slide mau dac - thuong thay dau tien tren slide trang hoac xam dac. LCD khong chay nhu the nay (tinh the long khong the gia khong deu nhu subpixel phat sang co the), nen check burn-in la duy nhat cua OLED.

Thuc te, cung bai kiem tra trinh duyet van hoat dong tren OLED - cac check pixel chet va pixel ket co gia tri, va check burn-in tu nhien phat sinh trong slide trang va xam dac. Chi can dien giai ket qua voi cuon quy tac OLED: "ro" la khong dong nhat, va "text bong" tren mau dac la luu giu hinh anh.

Tai sao "kiem tra LED online" va "kiem tra LCD online" deu ton tai nhu truy van

Ba ly do thuc day doc gia go bien the LED cua truy van:

  • Nhan marketing dinh chat. "TV LED" va "monitor LED" la nhan ma khach hang doc tren hop va tren site ban le. Khi man hinh tro chung, nguoi dung tim "kiem tra LED" vi do la danh tu tren hoa don - khong phai "kiem tra LCD", la tu vung ky thuat.
  • "LED" nghe moi hon "LCD". Nguoi tim kiem thuong gia dinh thuat ngu nghe moi hon la chinh xac hon. Nguoc lai moi dung: "LCD" mo ta phan hoat dong (pixel), trong khi "LED" mo ta nguon sang (den nen). Thay the CRT la LCD. Thay the CCFL la LED. Ca hai deu xay ra.
  • Man hinh dien thoai duoc mo ta khong nhat quan. Dien thoai voi panel LCD den nen LED (da so Android tam trung, iPhone XR / 11) va dien thoai voi panel OLED (iPhone X / 12+, da so Android flagship) deu duoc goi la "man hinh LED" trong copy tinh co cua cac site review. Nguoi tim kiem mang tu vung do vao Google.

Ket qua: cung trang kiem tra nhan ca hai luong truy van, va trang dung hoac la giai thich su tuong duong (huong dan nay) hoac la dinh tuyen doc gia toi bai kiem tra (kiem tra LCD). Ca hai hanh vi giu doc gia khoi pogo-stick quay lai ket qua tim kiem.

Bai kiem tra nay khong bao quat (va di den dau tiep theo)

Chu ky mau dua tren trinh duyet la cong cu dung cho loi cap panel. Khong phai cong cu dung cho mot so check ke can, va doc gia go "kiem tra LED" co the thuc su dang tim mot trong nhung cai do:

  • Xac minh tan so quet (60 Hz vs 120 Hz vs 144 Hz). Trinh duyet khong phoi bay tan so quet that su cua man hinh; window.matchMedia('(min-resolution: 120dpi)') tra loi cau hoi khac. De xac nhan tan so quet, dung cai dat OS (Display > Advanced) hoac app native nhu UFO Test tu plugin trinh duyet desktop.
  • Xac minh HDR / mau 10-bit. Mau trinh duyet bi clamp sRGB tren da so thiet bi; ngay ca khi panel ho tro HDR10, trang khong the day panel vao che do HDR ma khong co hop tac cua he dieu hanh. Dung mau test HDR cua OS (Windows HDR Calibration, preference Display cua macOS) de xac nhan HDR.
  • ICC profile / do chinh xac mau. Calibration den profile tham chieu (sRGB, P3, Rec. 2020) doi hoi mot colorimeter (X-Rite i1, SpyderX) va quan ly mau cua OS. Chu ky mau trinh duyet la cho phat hien loi, khong phai do do chinh xac mau.
  • Phan hoi man hinh cam ung. Mot man hinh khong loi display van co the co diem chet digitizer (lop touch, tach roi voi lop LCD hoac OLED). Cho viec do, chay Cach kiem tra man hinh cam ung tim diem xau - mot bai kiem tra khac cho mot lop khac.

Neu moi lo cua ban la mot trong nhung cai do, trang kiem tra LCD se noi panel on nhung khong tra loi cau hoi. Chon dung cong cu o tren va bo qua chu ky mau.

Chay bai kiem tra ngay: thoi gian 60 giay

  1. Mo bai kiem tra LCD trong mot tab trinh duyet.
  2. Maximize cua so trinh duyet hoac nhan F11 cho toan man hinh. Tat bat ky bo loc "Night Shift" / anh sang xanh nao va tang do sang len muc lam viec thuong gap.
  3. Click moi o mau theo thu tu: do, xanh la, xanh duong, trang, den, vang. Danh 5-10 giay cho moi cai.
  4. Tim: diem dac mot mau (pixel ket), diem ngang den tren moi slide (pixel chet), manh sang hon gan canh tren slide den (ro sang vien, chi LCD), van ban bong mo tren slide trang (luu giu hinh anh, chi OLED).
  5. Neu co gi do dang nghi, chup anh dien thoai slide trong khi no toan man hinh. Camera dien thoai trung binh hoa noise CCD, nen mot loi that tiep tuc trong anh trong khi artefact pixel-tren-pixel khong.

Neu bai kiem tra phoi bay loi va man hinh con bao hanh, ghi nhan dem, screenshot tung slide, va dieu kien kiem tra theo nguong RMA cua nha san xuat. Goi chung cu day du duoc bao quat trong Cach kiem tra pixel chet truoc khi tra monitor.

Cac cau hoi thuong gap

Man hinh LED va man hinh LCD co cung mot thu khong?

Hau nhu luon, co - tren laptop, monitor, dien thoai, va TV ban tu khoang 2009. "LED" mo ta cong nghe den nen dang sau mot panel LCD; panel chinh no van la LCD. Ngoai le la OLED, noi moi pixel la LED rieng va khong co den nen tach roi. Chu ky mau toan man hinh hoat dong tren ca ba, voi mot sac thai: ro sang vien chi LCD, va luu giu hinh anh chi OLED.

Toi tim "kiem tra LED" nhung ket thuc o mot trang ve LCD - toi den sai cho?

Khong. Bai kiem tra LCD chay cung quet per-pixel tren mot man hinh den nen LED nhu no chay tren mot man hinh den nen CCFL. Nhan marketing "LED" chi den nen; bai kiem tra van dong panel. Bat ky truy van nao den cong cu dung vi ca hai ten goi mo ta cung phan cung.

Bai kiem tra nay co hoat dong tren dien thoai cua toi khong?

Co. Chu ky mau trinh duyet chay tren Android Chrome, iOS Safari, va da so trinh duyet mobile. Khoa dien thoai o landscape, tang do sang, tat Night Shift / Reading Mode, va di qua cac mau. Tren man hinh co dien thoai, mot pixel chet kho thay hon; mot anh chup cua dien thoai slide trang co the giup xac nhan mot pixel dang nghi bang cach trung binh hoa noise mau cua mat nguoi.

Tai sao bai kiem tra khong noi man hinh cua toi la "LED" hay "OLED"?

Trinh duyet khong the doc field cong nghe panel tu firmware thiet bi - thong tin do chi duoc phoi bay cho he dieu hanh, khong phai trang web. Kiem tra spec thiet bi (site nha san xuat, hop) cho loai panel. Neu bai kiem tra phoi bay ro sang vien (manh sang hon tren slide den), man hinh la LCD; neu slide den dong nhat den nhung ban thay text bong tren slide trang, do la OLED.

Con mini-LED va QLED thi sao - chung co can bai kiem tra khac khong?

Khong. Mini-LED la mot mang den nen LED day dac hon (nhieu vung hon, kiem soat local-dimming min hon), va "QLED" la mot thuat ngu marketing cua Samsung cho LCD voi bo loc mau quantum-dot va den nen LED. Ca hai deu la panel LCD dang sau tu marketing, va check pixel chet + ro hanh xu giong nhau. Noi mini-LED khac la halo local-dimming tren slide den - chi thay o cuong do local-dimming day du, khong phai loi.

Lien quan

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