De danh gia  do hon kem cua cac TV LCD, nguoi ta thuong dua vao mot so tieu chi sau:

1. Do phan giai

Cacnha san xuat thuong nhan manh mot so thuat ngu nhu Full HD, HD ready dechi cac muc do phan giai  ma chiec TV do co kha nang dap ung. Truoc hetxuat phat tu tu viet tat HD nghia la High Definition dung de chi chatluong khung hinh co do phan giai  lon hon mot khung hinh chuan DVD  (720x 480 pixel). Nghia la nhung TV nao co kha nang hien thi duoc chatluong hinh tot hon chua DVD  thi goi la HDTV.

HD Ready la thuat ngu chi muc do phan giai  la 720p voi kich co 1280 x 720pixel.

Standard HD Ready hay mot so TV co ghi la 1080i co kich co khung hinh la 1920 x 640 pixel.

FullHD co kich co khung hinh la 1920 x 1280 pixel.

Khido phan giai cang lon thi hinh cang min, dac biet voi nhung man hinhlon se khong bi vo hinh. Tuy nhien, de dat duoc hieu qua cua FullHD thiphai dung dau va dia theo chuan FullHD.

Day cung la ly do  taisao cac ban xem TV o khu trung bay thay that tuyet voi nhung khi ve nhathi thay kem hon nhieu. Do la do o cac khu trung bay ho phat cac videomau voi chat luong  cao nhat bang dau va dia HD.

2. Do sang

Dosang cua TV LVD duoc tinh bang nhung chi so nhu 500cd/m2 hoac 800cd/m2.Ve nguyen tac, chi so nay cang lon thi cang tot, dac biet voi khonggian rong. Tuy nhien tuy theo kich co phong dat TV ma co the co luachon phu hop voi tui tien. Thong thuong do sang 500cd.m2 la du voikhong gian gia dinh.

3. Do tuong phan

Do tuong phan tinhduoc tinh bang ty le do sang cua diem anh sang/toi xuat hien tai motthoi diem trong khi muc tuong phan dong xet trong mot khoang thoi giannhat dinh.

Do tuong phan cua TV LCD  duoc the hien bang cac chiso nhu 1200:1, 5000:1, 8000:1 .. 12000:1. Do tuong phan cang lon thihinh anh the hien cang sau, ro net va sac so. Day la mot trong nhungchi so quyet dinh  tinh hien dai va gia tien cua mot TV. Cac TV LCD  daudoi chi dat do tuong phan 1000 den 1200:1, cac TV LCD  cach day 1 namchi dat 4000 – 5000:1.

4. Thoi gian  dap ung

Thoi gian dapung duoc the hien bang chi so 2ms, 5ms hay 8ms. Thoi gian  dap ung cangnho dong nghia voi toc do dap ung cang lon la cang tot. Neu thoi giandap ung cang dai thi dan toi hien tuong hinh anh  bi bong, lo mo khongro net dac biet la khi hien thi cac hinh anh  chuyen dong nhanh hay cactro choi toc do cao. Cac TV LCD  doi moi hien nay co thoi gian  dap ungthuong la 5ms.

5. Goc nhin

Goc nhin duoc the hien qua chiso <= 180o. Voi goc nhin hep, nguoi xem  chi nhin duoc hinh co chatluong tot nhat khi o chinh dien. Chi so goc nhin cho nguoi dung  bietpham vi ban cau ma nguoi dung  co the ngoi xem ma van co duoc hinh anhtot nhat. Chi so tuyet doi la 180o, tuy nhien hien nay mot so mau LCDdoi moi nhat moi dat duoc goc nhin la 178o. Ve nguyen tac, chi so naycang lon cang tot.

6. Tan so quet

Tan so quet hay con goila tan so lam tuoi man hinh  duoc the hien qua chi so thong thuong la60Hz. Co mot so TV LCD  co the co tan so quet len toi 100 – 120 Hz. Tanso nay cang lon thi hien thi cac canh phim  hanh dong, the thao  hay choiGame cang tot.

7. Bo kenh

Cac TV thong thuong chi co motbo kenh nen chi xem duoc 1 kenh TV tai mot thoi diem. De co duoc tinhnang Picture in Picture (PIP) thi TV phai co it nhat la 2 bo kenh trolen. Cai gia phai tra cho tinh nang nay cung la tuong doi lon hien nay(thuong chenh nhau den vai trieu dong).

8. Cac cong ket noi

CacTV LCD  co the co cac cong ket noi nhu: AV, Component, S-Video, HDMI,DVI va RGB. Cong AV (2 duong tieng, 1 duong hinh) la loai kem nhat dungcho dau VCD va mot so dau DVD  chat luong  kem. Cong Component co 3 duonghinh, 2 duong tieng cho chat luong  hinh tot hon. Cac dau DVD  doi saudeu ho tro. S-Video cung cho chat luong  hinh tot hon nhung gio it dung.HDMI va DVI deu cho chat luong  hinh cao hon, ho tro do phan giai  HD.Voi cong RGB ban co the noi voi may tinh  de ban hoac may tinh  xach tayva dung no thay cho man hinh  may tinh  thong thuong. Hien nay o cac congty chung khoan, san bay, nha ga ... cac man hinh TV  LCD  duoc dung noivoi cac may tinh  de hien thi so lieu. Cac ban chu y, cac TV LCD  co thekhong co du cac cong nay.

Thong thuong, voi cung mot gia tienthi TV LCD  cua Han Quoc  nhu Sam Sung, LG co cac chi so ky thuat  tot honso voi cac TV LCD  cua Nhat nhu Sony, Sanyo, Panasonic. Doi khi, cac TVcua Han Quoc  vua re hon lai nhieu tinh nang hon.

Ban co y kien gi ve bai viet 8 kinh nghiem mua Ti vi LCD nay? Hay goi suy nghi, binh luan, danh gia, loi khuyen ... cua ban ve bai viet 8 kinh nghiem mua Ti vi LCD ban tai day.