Nanostructure based display devices

A display device comprising:

• a first light source comprising a first organic light emitting diode (OLED), a first micro-LED, or a first quantum dot LED (QLED) configured to emit a first light having a first peak wavelength;
• a phosphor film configured to receive the first light and to emit a second light having a second peak wavelength that is different from the first peak wavelength;
• a second light source comprising a second OLED, a second micro-LED, or a second QLED configured to emit a third light having a third peak wavelength;
• and
• a non-phosphor film configured to receive the third light and to transmit a fourth light having a fourth peak wavelength that is different from the third peak wavelength, wherein the non-phosphor film comprises color filtering properties to filter the third light to thereby shift a peak wavelength from the third peak wavelength to the fourth peak wavelength.

A display device comprising:

• a light source configured to emit a first light having a first peak wavelength in a blue wavelength region of a visible spectrum;
• a quantum dot film, positioned on the light source, configured to emit a second light having a second peak wavelength that is different from the first peak wavelength and is in a red or green wavelength region of the visible spectrum;
• and
• a non-phosphor film, positioned on the array of light sources, configured to transmit a third light having a third peak wavelength that is different from the first peak wavelength and is in a blue wavelength region of the visible spectrum, wherein the non-phosphor film comprises color filtering properties to filter a portion of the first light to thereby shift the first peak wavelength to the third peak wavelength.