Lighting device, display device and television receiver
AssigneeSharp Kabushiki Kaisha
InventorKentaro Terashima
Life of this patent
Estimating the term…
Abstract
Provided is an illumination device that is capable of improving the utilization efficiency of light, while being lighter and thinner. This illumination device (10) is provided with: a light source (11) that emits ultraviolet light; a light guide plate (14) that guides the light from the light source; an optical member (15) placed between the light source and the light guide plate and that allows ultraviolet light emitted from the light source to pass through and that reflects visible light; and a fluorescent member (16) that is arranged between an ultraviolet light incident surface (15d) of the optical member and the light guide plate and that converts the ultraviolet light into visible light.
Claims12
An illumination device placed on a back side of a member to be illuminated, comprising:
- a light source that emits ultraviolet light;
- a light guide plate having a light incident surface whereon light from the light source is incident and a light exiting surface wherefrom light exits, the light guide plate guiding light from the light source;
- an optical member placed between the light source and the light incident surface of the light guide plate, the optical member having an ultraviolet light incident surface whereon ultraviolet light from the light source is incident, the optical member allowing ultraviolet light to pass through and reflecting visible light;
- and
- a fluorescent member placed between the ultraviolet light incident surface of the optical member and the light incident surface of the light guide plate, the fluorescent member converting ultraviolet light into visible light,
- wherein the light incident surface of the light guide plate has a smaller area than the light exiting surface.
Dependencies are inferred from the claim text.