Abstract: A display device comprises a light emitting diode (LED) which includes a porous semiconductor material, wherein the device comprises a pixel comprising a plurality of subpixels each having a light-emitting layer. A first subpixel has a first light-emitting layer having a first area A1, and a second subpixel has a second light-emitting layer having a second area A2 different from the first area A1. The first subpixel is configured to emit at a first peak wavelength, and the second subpixel is configured to emit at a second peak wavelength different from the first peak wavelength. A method of controlling this display device and a method of manufacturing said display device are also provided.

Abstract: A display device comprising a variable-wavelength light emitting diode (LED) is provided. The variable-wavelength LED comprises: an n-doped portion, a p-doped portion, and a light emitting region located between the n-doped portion and the p-doped portion. The light emitting region comprises a light-emitting layer which emits light at a peak emission wavelength under electrical bias thereacross. The variable-wavelength LED is configured to receive a power supply, and the peak emission wavelength of the LED is continuously controllable over an emission wavelength range of at least 40 nm by varying the power supply.

Abstract: A method of controlling an LED display device comprising an variable-wavelength LED comprises the steps of: providing a power supply to the variable-wavelength LED; and controlling the power supply to vary the peak emission wavelength of the LED within the emission wavelength range. A method of controlling a display device to reproduce a particular spectrum of light is provided.

Abstract: A display device comprises a light emitting diode (LED) which includes a porous semiconductor material, wherein the device comprises a pixel comprising a plurality of subpixels each having a light-emitting layer. A first subpixel has a first light-emitting layer having a first area A1, and a second subpixel has a second light-emitting layer having a second area A2 different from the first area A1. The first subpixel is configured to emit at a first peak wavelength, and the second subpixel is configured to emit at a second peak wavelength different from the first peak wavelength. A method of controlling this display device and a method of manufacturing said display device are also provided.

Abstract: A variable-wavelength light emitting diode (LED) is provided. The variable-wavelength LED comprises an n-doped portion, a p-doped portion, and a light-emitting region located between the n-doped portion and the p-doped portion. The light-emitting region comprises a light-emitting layer which emits light at a peak emission wavelength under electrical bias thereacross. The LED is configured to receive a power supply, and the peak emission wavelength of the LED is continuously controllable over an emission wavelength range of at least 40 nm by varying the power supply. A display device comprising this variable-wavelength LED, a method of controlling said variable-wavelength LED and a method of manufacturing a variable-wavelength LED are also provided.