hd, fhd, 2k, 4k

phn gii mn hnh l ch s cc im nh hin th trn mn hnh v thng c gi l pixels

phn gii mn hnh l ch s cc im nh hin th trn mn hnh v thng c gi l pixels. Cc ch s ny cng ln th mn hnh hin th cng chi tit.

Tuy nhin n phi c kt hp vi nhiu yu t khc nh: Cng ngh mn hnh, mt im nh, kch thc mn hnh th mi nh gi c mt mn hnh p hay khng, ch mt mnh phn gii thi th cha nhn xt c. Mt v d n gin nh mt mn hnh c kch thc 5 inch c phn gii 1920x1080 em so snh vi mt mn hnh khc cng c phn gii 1920x1080 nhng kch thc 7 inch, lc ny din tch mn hnh ln hn s phi tri nhiu im nh hn th c th s khng p bng, lc ny bn phi xem thm nhng thng s khc nh mt im nh (tc l s lng im nh trong mt vng trn mn hnh) nhn xt thm.

Hin nay trn cc sn phmsmartphonec mt s loi phn gii c bn nh:WVGA:cng lp vi VGA vi phn gii rng to nn mt khung hnh 16:9. WVGA c 854 pixel chiu ngang v 480 pixel chiu dc khung hnh hay ngn gn hn y l chun mn hnh c phn gii 480 x 854 px. Hin nay c kh nhiu sn phm trung cp c trang b cng ngh ny nh:Nokia

HYPERLINK "https://www.thegioididong.com/dtdd/nokia-lumia-525" \o "nokia lumia 525" \t "_blank" Lumia 525,Samsung Galaxy Win...

Mn hnh WVGA trn Lumia 525 v Galaxy Win

Mn hnh qHD: Ch "q" trong "qHD" l vit tt ca t "quarter" trong ting Anh c ngha 1/4. qHD c ngha l 1/4 ca phn gii HD hon chnh (full-HD). phn gii Full HD hon chnh l 1920x1080 pixel, nh vy qHD s c phn gii l 960x540 pixel.

HD: phn gii HD 1280 720 pixels bt ngun t truyn hnh nt cao (HDTV), n s dng 60 khung hnh mi giy. HD c t l khung hnh l 4:3. Do HD c nt gp 3 ln so vi VGA.Samsung Galaxy A5l mt trong nhng sn phm dng A-series ca SamSung s dng mn hnh HD.

Mn hnh HD trn Galaxy A5WQXGA hay XGA,WXGAthc cht y ch l 1 trong cc bin th ca phn giiHD (1280x720) tuy nhin n c m rng mt cc im nh ln thnh 1366 x 768 px vi t l khung hnh gn bng 16:9. phn gii ny c s dng trn cc my tnh bng ca Google HTC Nexus 9.

google htc nexus 9 s dng mn hnh phn gii WQXGA

FullHD: Hay cn gi l FHD c phn gii 1920 1080 im nh vi t l khung khung hnh 16:9 c pht trin ging HDTV.

phn gii mn hnh FullHD2K:n gin l phn gii ca loi mn hnh ny l 2560x1440 cho mt im nh ln hn, gip mn hnh smartphone tr nn sc nt v p mt hn so vi Full HD. Tuy nhin, theo kin nhiu ngi cho rng mn hnh vi phn gii 2K trn smartphone l mt trang b tha thi v khng cn thit, nht l khi mt ngi kh c th nhn ra s khc bit gia mn hnh phn gii 2K v Full HD 1080p.

4K hay QHD hay Ultra HD:C phn gii 3840 x 2160 pixel hoc 4096 x 2160 pixel, cao gp bn ln so vi phn gii c nt cao full HD 1080p (1920x1080 pixel). Nhng vi thi im hin ti th vic mn hnh 4K tch hp trn Samrtphone vn cn xa x v cha cn thit. phn gii ny ch yu mi bt u manh nha trn cc thit b nh tivi m thi.

phn gii mn hnh 4K s xut hin trn in thoi vo nm 2015CCH TNH MT IM NHMn hnh iPhone 4t l Cao : Rng l 3 : 2 nn vi ng cho 3.5 inch th chiu cao mn hnh l 2.91 inch, chiu rng l: 1.94 inch. S im nh ca mn IP4 l 960x640p th mt im nh l:960/2.91 = 329.65; 640/194 = 329.65 l con s chnh xc.Hay cch khc n gin hn l:S im nh theo ng cho ca IP4 = sqrt(960^2+640^2) = 1153.77ng cho: 3.5inchDo : mt = 1153.77/3.5 = 329.65