Extended multimedia use on mobile telecommunication devices has posed stringent demands to reduce the power dissipation of the mobile display. The majority of electric power in the mobile phone user interface is expended in the liquid-crystal display (LCD) backlight unit. This study addresses the problem of designing more energy-efficient display systems by embedding the display backlight light-guide plate into the back substrate glass of the mobile display, by use of slanted grating arrays etched into a high refractive index glass, overlaid with a low-index polymer cladding layer. The results indicate that it is possible to design a grating arraysuitable for directional outcoupling of the red, green, and blue primaries toward the user, to be modulated with an electro-optic array such as an LCD.
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