A:Answer Mahesh - The QN85A features Wide Viewing Angle technology, as well as HDR 24X which provides you with vivid colors tuned for exceptional detail, providing dynamic contrast and a crisp picture. The QN85A also features Object Tracking Sound which utilizes 4 speakers to place sounds exactly where they appear on-screen and optimizes sound based on each scene. The QN90A features HDR 32X which brings details to life with ultra-rich color, deep contrast, and HDR10+ dynamic tone mapping that shifts the color and contrast scene by scene for spectacular clarity. HDR refers to the range of luminance. Additionally, the QN90A features Object Tracking Sound Plus (OTS+) which uses 6 strategically placed speakers to place sounds exactly where they appear on-screen and optimizes sound based on each scene. Another benefit gained when stepping up from the QN85A is Ultra Viewing Angle which makes every seat in the house a great one. Engineered to reduce glare and enhance color, this feature delivers a vibrant picture no matter where you sit. ^Gina
