Patent ID: 6717635
Filing Date: 2004-04-06
Classification: G02B,Y10S

Abstract:
A liquid crystal display device comprising:a light guide plate; and a light source disposed on one of side surfaces of said light guide plate so that external light is transmitted through said light guide plate and enters a front surface of a liquid-crystal display portion; wherein a plurality of dots are disposed at random and each of said dots is constituted by a small recess or protrusion portion reflecting light from said light source toward said liquid crystal display portion and is formed so that each of said dots is substantially rectangular in plan shape and has a short-side length in a range of 0.002 to 0.05 mm and a long-side length in a range of 0.002 to 0.2 mm and is provided in another surface of said light guide plate opposite to a further surface thereof and confronting said liquid crystal display portion, each of said dots having a substantially V-shape in section, and an inclination angle of said section is in a range of from 35Â° to 43Â°; and wherein a vertex angle of each of said dots is about 70.6Â°Â±2.50Â°.