Fingerprint recognition optical film, and backlight unit and liquid crystal display device comprising the film optical

A backlight unit comprising a fingerprint recognition optical film comprising;

• a base film;
• and
• a lens pattern layer including a plurality of lenses attached to one surface of the base film and being parallelly arranged with a predetermined distance and a flat pattern portion formed among the plurality of lenses to transmit the infrared ray
• wherein a protrusion direction of the plurality of lenses is arranged to face to a light source.

A liquid crystal display (LCD) device comprising:

• a LCD (liquid crystal display) panel;
• and
• a backlight unit located under the LCD panel and comprising a fingerprint recognition optical film, the fingerprint recognition optical film comprising:
• a base film;
• and
• a lens pattern layer including a plurality of lenses attached to one surface of the base film and being parallelly arranged with a predetermined distance and a flat pattern portion formed among the plurality of lenses to transmit the infrared ray,
• wherein a protrusion direction of the plurality of lenses is arranged to face to a light source.