Abstract: Display devices having improved color reproduction ranges and improved color purity of the screen images are provided. In one embodiment, the display device includes a display panel for displaying an image, and a light emitting panel for providing light to the display panel. The light emitting panel includes first and second substrates facing each other, an electron emission unit on an inner surface of the first substrate and including electron emission regions and driving electrodes, a light emission unit on an inner surface of the second substrate and including an anode electrode and a phosphor layer, and a filter layer formed on a surface of the second substrate for selectively absorbing light in wavelength bands ranging from about 480 nm to about 500 nm and from about 580 nm to about 600 nm.

Abstract: A white phosphor, a light emission unit including the white phosphor, and a display device including the light emission unit are provided. The white phosphor comprises a green phosphor including a Tb-doped oxide host material, a blue phosphor and a red phosphor. The green phosphor doped with Tb is used as an activator, and has a wavelength which does not overlap with a wavelength of the blue phosphor, thereby improving color purity of the light emission device.

Abstract: A light emission device in which a light emission unit has an improved structure and a display device using the light emission device as a light source. The light emission device includes first and second substrates facing each other with a predetermined distance therebetween, an electron emission unit located on one side of the first substrate, and a light emission unit located on one side of the second substrate. The electron emission unit includes a plurality of electron emission elements. The light emission unit includes at least one phosphor layer and a reflection layer spaced apart from the phosphor layer with a barrier disposed between the phosphor layer and the reflection layer.