MICROLENS ARRAY SHEET AND LIQUID CRYSTAL DISPLAY FORMED BY USING THE SAME

摘要

PURPOSE:To obtain a wide visual field angle by forming unit microlenses by the boundaries of first and second material layer and specifying the refractive angle when the rays from the direction normal to the surface on the second material layer side emit into the atm. through the first material layer. CONSTITUTION:This microlens array sheet is arranged with the very small unit parts having lens functions in a plane form. The boundary 3 of the first material layer 1 held by two parallel planes 4, 5 of each unit lens and the second material layer 2 having the refractive index smaller than the refractive index of the first material layer constitutes a concave face and/or convex face, thereby functioning as a lens. The refractive angle 9 (max. refractive angle alpha) when the ray 8 entering from the direction normal to the surface on the second material layer 2 side passes the first material layer 1 and emits from its surface 4 is required to be >=30 deg. when indicated by the angle to the normal direction of the surface 4 at the time of defining the point on the boundary 3 where the less wider angle 9 among the angles formed by the contact point at a certain point on the rugged surface and the surface attains the max. value of thetamax as a point A7.