A display device includes an optical waveguide layer, a variable refractive index layer, and an optical layer. The refractive index of the variable refractive index layer changes in response to application of a drive voltage. The optical layer reflects or absorbs light. The variable refractive index layer reflects the light to be guided through the optical waveguide layer 11 toward the inside of the optical waveguide layer depending on the refractive index of the variable refractive index layer to allow the optical waveguide layer to guide the reflected light. The variable refractive index layer introduces the light to be guided through the optical waveguide layer into the variable refractive index layer depending on the refractive index of the variable refractive index layer and emits the introduced light out of the variable refractive index layer. The optical layer reflects or absorbs the light emitted from the variable refractive index layer.

According to one embodiment, a display device includes a first color film of a first color and a second color film of a second color, wherein the irradiator comprises a first light source of a third color and a second light source of a fourth color, the first color and the second color have a complementary color relationship, lightness of the first color is greater than lightness of the second color, a first total displayable area of the first color film is larger than a second total displayable area of the second color film, and the irradiator is configured to radiate light of the first light source and the second light source in a switching manner by time division.

A display device includes a plurality of divided pixels each comprising a reflective electrode, a counter electrode provided so as to face the reflective electrode, a color filter provided on a side of the counter electrode opposite to a side of the counter electrode facing the reflective electrode, and a holding unit configured to hold a potential corresponding to an expression of a gradation; and an inorganic light emitter provided on the counter electrode side of the color filter, and configured to emit light.

A display device includes a plurality of divided pixels, each of which comprising a reflective electrode, a counter electrode provided so as to face the reflective electrode, and a holding unit configured to hold a potential corresponding to an expression of a gradation, and an inorganic light emitter provided on a side of the counter electrode opposite to a side of the counter electrode facing the reflective electrode, and configured to emit light toward the divided pixel.

A display device that is provided with a light-transmitting shutter element panel wherein shutter elements that control light transmission are arranged in a matrix and with a backlight panel that has organic electroluminescence elements and that is arranged so as to overlap the shutter element panel. The organic electroluminescence elements used in the display device are layered elements wherein light-emitting units of different colors are sandwiched between a plurality of electrodes and single-layer elements wherein a white light-emitting unit or a light-emitting unit of the complementary color of any of the different colors is sandwiched between a pair of electrodes. The layered elements and the single-layer elements are arranged so as to overlap the shutter elements in stripes that run parallel to the direction in which the shutter elements are arrayed.

Provided is a display device that can reduce electric power consumption. The display device is provided with a backlight (100) and with a field-sequential display panel (200). The backlight has light-emitting units that comprise an organic electroluminescence element in which are layered a plurality of light-emitting units that emit light of different colors. The light-emitting units that can emit white light or yellow light are provided furthest to a light-emission-surface side.

Provided is a display device that can perform stable field-sequential drive. The display device is provided with a backlight (100) and with a field-sequential display panel (200). The backlight has light-emitting units that are organic electroluminescence elements that can emit light of the three primary colors red, green, and blue. At least one electrode of the organic electroluminescence elements comprises Ag or an alloy that includes Ag as a principal component.

A light source apparatus includes a plurality of light source groups, wherein each light source group has: a plurality of first light sources configured to emit light of a first color; a plurality of second light sources configured to emit light of a second color; and a plurality of third light sources configured to emit light of a third color, and a distance between the plurality of second light sources of the same light source group and a distance between the plurality of third light sources of the same light source group are each shorter than a minimum value of a distance between the plurality of first light sources of the same light source group.

A display apparatus includes a plurality of prism patterns disposed between a display panel and a light guide plate and having a shape of an inverted triangle, each of the plurality of prism patterns including a first pattern including a first side having a shape of an inverted triangle, which faces the display panel, a second side connecting one end of the first side to a vertex of the inverted triangle disposed under the first side, and a third side connecting the other end of the inverted triangle to the vertex and a second pattern having a refractive index less than that of the first pattern and disposed in the first groove that is defined in the second side to extend in a direction crossing the second side.

An electronic device may be provided with a display having a backlight with light sources of different colors. The electronic device may include a color ambient light sensor that measures the color of ambient light and control circuitry that adjusts the color of light emitted from the backlight based on the color of ambient light. The light sources may include at least first and second light-emitting diodes that emit light having different color temperatures. The control circuitry may adjust the intensity of light emitted from the first light-emitting diode relative to the intensity of light emitted from the second light-emitting diode to produce a backlight color that more closely matches the color of ambient light. The first and second light-emitting diodes may include an ultraviolet light-emitting diode die and a blue light-emitting diode die that are mounted in a common semiconductor package.