Light source module

A light source module, comprising:

• an optical film;
• and
• at least one light source unit, wherein the at least one light source unit and the optical film enclose a space, and the light source unit comprises:
• a reflecting device, disposed under the optical film;
• at least one light bar, comprising a plurality of light-emitting elements, wherein a direction of an optical axis of the light-emitting elements is defined as a first direction, and a direction perpendicular to the first direction and perpendicular to the optical film is defined as a second direction, and the light-emitting elements are arranged along a third direction perpendicular to the first direction and perpendicular to the second direction;
• a collimated unit, extending along a direction parallel to the third direction, and comprising:
• an upper reflective portion, wherein one end of the upper reflective portion is located adjacent to the optical film, and the other end is located adjacent to the light-emitting elements;
• and
• a lower reflective portion, disposed opposite to the upper reflective portion, wherein one end of the lower reflective portion is located adjacent to the reflecting device, and the other end is located adjacent to the light-emitting elements, a shortest distance between one end of the lower reflective portion located adjacent to the reflecting device and the optical axis of the light-emitting elements along the second direction is defined as a first half light-emitting width, and the first half light-emitting width is gradually increased along the third direction from a center portion of the collimated unit towards two sides thereof, wherein the light-emitting elements are located between the upper reflective portion and the lower reflective portion.