Light guide for a backlight unit, backlight unit and display device

Abstract

The present invention is related to a light guide (3) for a backlight unit. The invention is further directed towards a backlight unit that comprises such a light guide (3) and to a display device that comprises such a backlight unit. The light guide (3) comprises at least one light incoupling section (30) having a first thickness (dlis), a light guiding section (32) having a second thickness (dlgs) smaller than the first thickness (dlis), and at least one tapered light mixing section (31) connecting the at least one light incoupling section (30) and the light guiding section (32). The at least one light incoupling section (30) comprises an array of total internal reflection collimators (300). The light guiding section (32) has a top surface (320) and a bottom surface (321) and is configured to couple out light guided within the light guiding section (32) through the top surface (320).

Dependencies are inferred from the claim text.