To provide a light source having a high outward radiation efficiency in which contrast is prevented from lowering at the time of lighting or unlighting a light source while eliminating dark noise.

A lens type LED is mounted on a substrate and a light shielding member is disposed in the light emitting direction of the LED. Furthermore, an inner lens is disposed between the LED and the light shielding member. Light is radiated from the LED toward the inner lens and condensed light is radiated outward from a through port made in the light shielding member.