Surface light source apparatus, and method and apparatus for manufacturing the same

A surface light source apparatus comprising:

• a light guide panel processed by a laser beam to scatter and diffuse light at a uniform brightness in an entire area and a light guide pattern portion having a plurality of grooves having an intermittent shape;
• at least one light source installed at one side wall of the light guide panel and emitting light to the light guide panel;
• and
• a reflection panel installed at a lower portion of the light guide panel,
• wherein the grooves having an intermittent shape of the light guide pattern portion is formed by scanning a laser beam output from a laser system via a mirror header portion onto a scanning surface of the light guide panel by time control while the mirror header portion horizontally moves on an X-axis guide rail and the X-axis guide rail vertically moves with respect to a Y-axis guide rail.

A surface light source apparatus comprising:

• a light guide panel processed by a laser beam to scatter and diffuse light at a uniform brightness in an entire area and a light guide pattern portion having a plurality of grooves satisfying an equation that
• 4 d ⁡ ( μ ⁢ ⁢ m ) × w ⁡ ( μ ⁢ ⁢ m ) p ⁡ ( μ ⁢ ⁢ m ) = 25 ∼ 65 , wherein ⁢ ⁢ the ⁢ ⁢ range ⁢ ⁢ of ⁢ ⁢ t ⁡ ( mm ) S ⁡ ( mm 2 ) ⁢ ⁢ is ⁢ ⁢ 6 × 10 - 5 ∼ 1.2 × 10 - 4 ,
• wherein t is a thickness of the light guide panel, S is an area of a process surface of the light guide panel, d is a process depth of the light guide pattern portion, w is a line width of each groove of the light guide pattern, and p is a pitch between the grooves of the light guide pattern portion, and
• at least one light source installed at one side wall of the light guide panel and emitting light to the light guide panel.

A method of manufacturing a surface light source apparatus comprising the steps of:

• forming a light guide pattern portion having a plurality of grooves on one surface of a light guide panel by emitting a laser beam within a range satisfying an equation that
• 5 d ⁡ ( μ ⁢ ⁢ m ) × w ⁡ ( μ ⁢ ⁢ m ) p ⁡ ( μ ⁢ ⁢ m ) = 25 ∼ 65 , wherein ⁢ ⁢ the ⁢ ⁢ range ⁢ ⁢ of ⁢ ⁢ t ⁡ ( mm ) S ⁡ ( mm 2 ) ⁢ ⁢ is ⁢ ⁢ 6 × 10 - 5 ∼ 1.2 × 10 - 4 ,
• wherein t is a thickness of the light guide panel, S is an area of a process surface of the light guide panel, d is a process depth of the light guide pattern portion, w is a line width of each groove of the light guide pattern, and p is a pitch between the grooves of the light guide pattern portion;
• forming at least one light source installed at one side wall of the light guide panel and emitting light to the light guide panel;
• and
• installing a reflection panel reflecting the light emitted from the light source and guided in the light guide panel at a portion corresponding to a light guide surface where the light guide pattern portion is formed.