Patent ID: 7597470

Claim:
A display device, comprising: a first display portion that has a color filter; a second display portion; a light source having a light-emitting element that emits light including a wavelength which excites a fluorescent substance, and a transparent resin mixed with the fluorescent substance for emitting a first light having a different wavelength component when excited by light emitted by the light-emitting element; a light guide plate having an incidence surface through which the first light from the light source enters, a first light-emitting surface for illuminating the first display portion, and a second light-emitting surface for illuminating the second display portion; and light conversion means provided between the first display portion and the first light-emitting surface for converting the first light to a second light that has a color component different from a color component of the first light, wherein the first display portion is illuminated by white light obtained by mixing the first light and the second light to perform a color display and the second display portion is illuminated by the first light to perform a monochromatic color display.