Patent ID: 8456590
Filing Date: 2013-06-04
Classification: G02B,G02F,Y10T

Abstract:
1. An optical sheet, comprising: a translucent substrate having first and second surfaces; an optical element provided on the first surface of the translucent substrate, the optical element including a plurality of unit prisms or unit lenses arranged thereon; and at least one light diffusion layer provided in at least one of the following locations: wherein the at least one light diffusion layer includes micro particles and gap parts which are formed around the micro particles, respectively, and each of the gap parts has an oval shape oriented in a uniaxial direction, and an image contrast value of the light diffusion layer having the gap parts is equal to or less than 15 at a slit pitch of 0.5 mm, the image contrast value being measured by a method standardized by JIS K 7374.