| abstract |
An optical member capable of realizing a liquid crystal display device having excellent mechanical strength and suppressed color shift. An optical member of the present invention includes a polarizing plate, a reflective polarizer, a low refractive index layer, and a prism sheet, and the refractive index n of the low refractive index layer satisfies a relationship of 1 <n ≦ 1.31. . Typically, the refractive index n and thickness d (nm) of the low refractive index layer satisfy the relationship represented by the following formula (1) or (2). 1 <n ≦ 1.20 and 300 ≦ d (1) 1.20 <n ≦ 1.30 and 500 ≦ d (2) [Selection] Figure 1 |