Light guide plate having multi-period patterns and illumination apparatus using the diffuser sheet

摘要

The invention and employing a light guide plate having a fine pattern of multiple cycles to minimize color dispersion discloses a lighting device for a display device . According to a preferred embodiment of the present invention, in the light guide plate a fine pattern is formed in the top surface so as to emit the incident light from one side over the whole area of the top surface , to reduce the dispersion of light to be emitted through the top surface in order , the fine pattern is characterized in that at least two periodic patterns are mixed with different cycle .