SURFACE LIGHT SOURCE AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

Provided are: a surface light source having uniform brightness and color while using a lens having a strong light-spreading power; and a liquid crystal display device. A light-emitting device (1) radiates light using an optical axis (A) as the center, and comprises a light source (2) and the lens (3) that radially spreads the light from the light source (2). The light source (2) has a light-emitting element and a phosphor covering the light-emitting element, and has a light-emitting surface orthogonal to the optical axis. The lens (3) is configured such that the refractive power in a first direction orthogonal to the optical axis differs from the refractive power in a second direction orthogonal to the optical axis and the first direction. For example, the incident surface (31) of the lens (3) includes an anamorphic curved surface having mutually different curved shapes in the first direction and the second direction.