Patent ID: 7093968

Claim:
A light guide-based flat fluorescent panel comprising: a light guide plate having a light outlet surface, a reflective surface, and a light inlet surface, said reflective surface being provided with a plurality of light guide points, said light inlet surface being fogged or roughened; a reflector adhered to said reflective surface; at least one diffuser arranged on said light outlet surface; a condenser arranged on said diffuser; a lamp source arranged externally to said light inlet surface; a reflector substantially covering said lamp source; wherein said light outlet surface has a fogged scattering region which has a width starting from a point where light emitted upwardly from said light inlet surface to fall on a primary light source reaches a point that is greater than a critical point, until light emitted downward from said light inlet surface to fall on said reflective surface where a primary light source reaches a point that is greater than a critical point for a secondary light source to reflect once again to reach within a range of location of said light outlet surface.