초록 ▼

A light guide plate is provided which utilizes the phenomenon of diffraction based on wave optics of light, and which can provide much higher and more uniform brightness over an entire illuminated surface than the brightness level achievable by the prior art and can assure longer battery life throug

A light guide plate is provided which utilizes the phenomenon of diffraction based on wave optics of light, and which can provide much higher and more uniform brightness over an entire illuminated surface than the brightness level achievable by the prior art and can assure longer battery life through reduced power consumption for a light source. The light guide plate consists of a transparent plate, at least on one end of which light rays from the light source fall. The light guide plate has a diffraction grating printed or worked on a bottom surface thereof such that at least one of a grating part width/non-grating part width ratio in unit-width or a sectional configuration of the diffraction grating is varied so as to enhance and uniform light intensity on a top surface of the light guide plate.

대표청구항 ▼

A light guide plate comprising: a transparent plate; and a diffraction grating provided on a bottom surface of the plate and diffracting toward a top surface of the plate light incident from a light source to at least one end of the plate; wherein a grating part width/non-grating part width ratio in

A light guide plate comprising: a transparent plate; and a diffraction grating provided on a bottom surface of the plate and diffracting toward a top surface of the plate light incident from a light source to at least one end of the plate; wherein a grating part width/non-grating part width ratio in a unit-width of the diffraction grating is varied so as to enhance and provide uniform light intensity on the top surface of the light guide plate.