Patent ID: 8562171

Claim:
An LED linear light source comprising: a light guiding member; an LED at an end portion the light guiding member, wherein the light guiding member is an approximately arc shape when taken in a cross sectional view perpendicular to an optical axis that is in a longitudinal direction of the light guiding member, and wherein the light guiding member has an upper face including a light emission face for emitting light and a lower face including a reflective face arranged in parallel to the upper face along the optical axis to face the upper face; a diffusing member that diffuses light provided on only a light emission face side of an outer circumferential face adjacent to a light entering end face of the light guiding member; a diffusion and reflection member is arranged under the light guiding member, the diffusion and reflection member having a cut out portion formed thereinto; and a light absorption member provided outside of the light guiding member and near an end portion of the light guiding member, the light absorption member facing the cut out portion thereby inhibiting the diffusion and reflection member from diffusing and reflecting light where the cut out portion and the light absorption member are located.