Uzak ışık dönüştürücü mekanizma ile renk gamutu arttırımı

The colour gamut of liquid crystal displays (LCDs) depends on the backlight unit spectrum. For the light emitting diode (LED) based backlight units, either phosphors or quantum dots are used to convert the blue light of the LEDs to red and green bands. On-chip phosphor and quantum dot configurations are optically and thermally inefficient as well as they reduce the lifetime of the LED chips. The topic of this thesis is remote backlight configurations where the light conversion is done away from the LED chips. We propose a configuration where a light conversion layer is placed in the backlight unit as a thin film in order to produce red and green bands. We matched the emission spectrum of the blue LEDs and the phosphorus layer to the colour filters of the LCD, so that the red, green, and blue bands efficiently expand the colour gamut. On the other hand, we have studied several on-chip phosphor converted LED based displays by designing a common BLU structure. On this structure, we have experimented optical and thermal design parameters by using LEDs with yellow Ce doped YAG phosphors and KSF based blend of green and red band emitting phosphors. In addition, we have also compared our results on remote phosphor light conversion layers with remote quantum dot containing films. Finally, we have compared and determined the critical display design parameters in terms of product reliability and durability.