Optical sheet for backlight, backlight, and display device

A backlight comprising:

• a surface light source;
• and
• an optical sheet provided on said surface light source, said optical sheet including an optical reflection layer having a plurality of through grooves arranged at a prescribed interval and a plurality of cylindrical lenses each provided in a corresponding through groove, the width of said through groove being narrowed from the upper surface to the lower surface of said optical reflection layer, said cylindrical lens being filled in said through groove and having a cylindrical surface on the upper surface side of said optical reflection layer.

A display device comprising:

• a backlight including an optical sheet and a surface light source provided with said optical sheet, said optical sheet including an optical reflection layer having a plurality of through grooves arranged at a prescribed interval and a plurality of cylindrical lenses each provided in a corresponding through groove, the width of said through groove being narrowed from the upper surface to the lower surface of said optical reflection layer, said cylindrical lens being filled in said through groove and having a cylindrical surface on the upper surface side of said optical reflection layer;
• and
• a liquid crystal panel provided on said backlight.

A backlight comprising:

• a surface light source;
• and
• an optical sheet provided on said surface light source, said optical sheet including a sheet type optical reflection layer having a plurality of through holes and a plurality of micro-lenses each provided in a corresponding through hole, said through hole being gradually reduced in size from the upper surface to the lower surface of said optical reflection layer, said micro-lens being filled in said through hole and having a spherical surface on the upper surface side of said optical reflection layer.

A display device comprising:

• a backlight including an optical sheet and a surface light source provided with said optical sheet, said optical sheet including a sheet type optical reflection layer having a plurality of through holes and a plurality of micro-lenses each provided in a corresponding through hole, said through hole being gradually reduced in size from the upper surface to the lower surface of said optical reflection layer, said micro-lens being filled in said through hole and having a spherical surface on the upper surface side of said optical reflection layer;
• and
• a liquid crystal panel provided on said backlight.