Patent ID: 7505024
Filing Date: 2009-03-17
Classification: G02B,G02F

Abstract:
1. A backlight unit suitable for a display device, the backlight unit comprising: first to (n)th light guiding plates for field sequential drive, wherein the first to (n)th light guiding plates are formed in parallel, wherein each of the first to (n)th light guiding plates includes a first and a third side in parallel at one direction and a second and a fourth side in parallel at another direction perpendicular to the one direction, wherein each of the first to the (n)th light guiding plates has a mirror-polished surface on at least one of the first and third sides, and wherein the mirror-polished surface is for preventing leakage of light to adjacent light guiding plates that are currently not driven; a light source controller disposed at the second and fourth sides of the first to (n)th light guiding plate, wherein the light source controller includes at least one PCB substrate or FPC; and a plurality of light sources opposing to the second and fourth sides of the first to (n)th light guiding plates at certain intervals, wherein the light sources are controlled by the light source controller and the light sources are formed on the PCB substrate or FPC.