Display apparatus and cellular phone, computer and television including the same

A display device, comprising a first substrate, a second substrate, and light valve units secured between the first substrate and the second substrate, polarizer provided on the first substrate and the second substrate, a light source provided on one side of the second substrate, characterized in that,

• more than one photoluminescence film are provided on the first substrate, the light source emits a light with a wavelength in the range of ultraviolet or cyan, and under the excitation of the light source, the photoluminescence film emits a red light, a green light, a blue light and/or an intermediate color light among red, green and blue lights;
• the light emitted from the light source has a peak value at a wavelength in the range of 350-560 nm;
• pixels of the photoluminescence film are surrounded with a black matrix with an non-uniform aperture ratio;
• the light source is operated in a static manner or controlled by a display image signal;
• and the photoluminescence film has a partially light-absorptive function by being doped with an absorptive material, and the electron transfer between the luminescent material and the absorptive material is prevented by providing an insulating material between the materials.