Backlight module

A backlight module, comprising:

• a light guide plate, having a plurality of V-cuts on both sides;
• a reflective film, disposed on a lower side of the light guide plate;
• and
• at least one light source, disposed around the light guide plate;
• wherein the backlight module is characterized in comprising a single optical film disposed on an upper side of the light guide plate, and the optical film comprises a substrate and a plurality of micro lens structures, and the substrate comprises a support layer and a reflective polarizer layer, and a light field of the backlight module meets the following conditions (I), (II), and (III):
• horizontal half brightness visual angle≧70° (I)
• brightness uniformity≧70% (II)
• light leakage rate at large visual angle≦65% (III).

A backlight module, comprising:

• a light guide plate, having a plurality of V-cuts on both sides;
• a reflective film, disposed on a lower side of the light guide plate;
• and
• at least one light source, disposed around the light guide plate;
• wherein the backlight module is characterized in comprising a single optical film disposed on an upper side of the light guide plate, and the optical film comprises a support layer, a plurality of linear arc-shaped cylindrical structures, and an anti-scratch layer, wherein a top angle of the cylindrical microstructures is about 100°-120°, a top angle curvature radius of the cylindrical microstructures is less than about 5 μm, and a ridge of the light-adjusting structures is perpendicular to the positioning direction of light source,
• the optical film has a haze of about 20%-95% as measured according to JIS K7136 standard, and a light field of the backlight module meets the following conditions (I), (II), and (III):
• horizontal half brightness visual angle≧70° (I)
• brightness uniformity≧70% (II)
• light leakage rate at large visual angle≦65% (III).