Patent ID: 6406159
Filing Date: 2002-06-18
Classification: G02B

Abstract:
A back-light device for a liquid crystal display comprising:a light guiding plate; a cathode tube used to emit light into said light guiding plate; a diffusion sheet mounted in proximity to a surface on one side of said light guiding plate, which light being transmitted through the surface on one side of said light guiding plate out of light incident on said light guiding plate; a reflection sheet mounted in proximity to a surface on other side of said light guiding plate, which is used to reflect light reflected off the surface on one side of said light guiding plate; a chromaticity correcting member for correcting chromaticity mounted at the end, positioned nearer to said cathode tube, of said reflection sheet; and whereby the light reflected off said reflection sheet is reflected repeatedly between the surface on one side of said light guiding plate and said reflection sheet, causing light incident on said light guiding plate to be uniformly radiated over a liquid crystal display panel.