Pixel" ka lafz "Picture Element" se nikla hai, jo digital images aur screens ka sab se chhota aur bunyadi hissa hota hai. Agar aap kisi bhi digital tasveer ko bohot zyada zoom karen, to aap ko chhote chhote rang-birange square boxes nazar aayenge. Inheen squares ko pixels kehte hain. Yeh pixels mil kar hi aap ki screen par puri tasveer, video, ya text banate hain. Agar hum screen ko aik "bed of nails" ki tarah samjhein, to har keel (nail) aik pixel hai jo apni khususi raushni aur rang se mil kar picture mukammal karti hai. 

Har pixel khud teen chhote "subpixels" se mil kar banta hai, jin mein surkh (Red), sabz (Green), aur neela (Blue) rang hota hai, jise RGB color model kehte hain. Yeh subpixels apni raushni ki shiddat (intensity