Patent ID: 6566689
Filing Date: 2003-05-20
Classification: G02B,G02F

Abstract:
An illumination system for illuminating a display device, which illumination system is provided with a light-emitting panel (1) comprisinga front wall (2), a rear wall (3) situated opposite said front wall, and edge areas (4, 5) between the front wall (2) and the rear wall (3), at least one of the edge areas (4) of the panel (1) being light-transmitting, at least one light source (6) being associated with the light-transmitting edge area (4), and in operation, light originating from the light source (6) being incident on the light-transmitting edge area (4) and spreading in the panel (1), characterized in that the light source (6) associated with the light-transmitting edge area (4) of the light-emitting panel (1) comprises clusters (C) of at least three light-emitting diodes (6G, 6B, 6R, 6Bâ€², 6Gâ€²; 16G, 16B, 16R, 16Râ€², 16Bâ€², 16Gâ€²; 26Gâ€²; 26B, 26R, 26G, 26Râ€², 26Bâ€², 26Gâ€³) having a first, a second and a third light emission wavelength, which light emission wavelengths are different, an imaginary mirror surface (S), which relates to the cluster (C), being situated in the center of each cluster, the light-emitting diodes in the cluster (C) being arranged in a direction perpendicular to the imaginary mirror surface (S), and the light-emitting diodes (6G, 6B, 6R, 6Bâ€², 6Gâ€²; 16G; 16B; 16R, 16Râ€², 16Bâ€², 16Gâ€²; 26Gâ€², 26B, 26R, 26G, 26Râ€², 26Bâ€², 26Gâ€³) being distributed over the cluster (C) in such a manner that the spectral emissions of the light emitted by the light-emitting diodes are mirror symmetrical with respect to the imaginary mirror surface (S).