Patent ID: 8550644

Claim:
A lighting device comprising: a light source; a chassis configured to house the light source and have an opening for light from the light source to pass through, the chassis including a light source installation area in which the light source is arranged and an empty area in which no light source is arranged; an optical member provided to face the light source and cover the opening, the optical member including a light source overlapping portion that overlaps the light source installation area and an empty area overlapping portion that overlaps the empty area; and a light reflecting portion provided on at least the light source overlapping portion of the optical member and configured to reflect light from the light source, wherein: in a light reflectance distribution in a surface area of the optical member, the surface of the optical member has maximum light reflectance Rmax and minimum light reflectance Rmin, and the maximum light reflectance Rmax is 40% or higher in the light source overlapping portion and an entire half-value width H having light reflectance of (Rmax+Rmin)/2 occupies 25% to 80% in a transmission area of the optical member through which the light from the light source transmits.