LIGHT SOURCE MODULE AND LIGHT SOURCE UNIT
A light source module including at least one optical film and a light source unit is provided. The light source unit is disposed under the at least one optical film, and a space is formed between the light source unit and the at least one optical film. The light source unit includes a plurality of light emitting elements and a plurality of secondary lenses. The light emitting elements are arranged along a direction parallel to the at least one optical film. The secondary lenses are correspondingly disposed on the light emitting elements and each of the secondary lenses has a patterned reflective layer. Each of the secondary lenses has a light hole radius R, a distance between a distribution range of the patterned reflective layer and a bottom of the corresponding secondary lenses is H, and the distribution range of the patterned reflective layer satisfies 1/R<H<3/2R.
1 . A light source module, comprising:
at least one optical film; and
a light source unit, disposed under the at least one optical film, a space being formed between the light source unit and the at least one optical film, and the light source unit comprising:
a plurality of light emitting elements, arranged along a direction parallel to the at least one optical film; and
a plurality of secondary lenses, correspondingly disposed on the light emitting elements, and each of the secondary lenses having a patterned reflective layer, wherein each of the secondary lenses has a light hole radius R, a distance between a distribution range of the patterned reflective layer and a bottom of the corresponding secondary lens is H, and the distribution range of the patterned reflective layer satisfies 1/3R<H<3/2R.
2 . The light source module of claim 1 , wherein each of the secondary lenses is a refractive secondary lens, and the patterned reflective layer is disposed on a circumference of an upper surface of the corresponding secondary lens.
3 . The light source module of claim 2 , wherein the distribution range of the patterned reflective layer satisfies 1/3R<H<R.
4 . The light source module of claim 2 , wherein a distance between the distribution range of the patterned reflective layer and a center of the corresponding secondary lens is X, and the distribution range of the patterned reflective layer satisfies 4/5R<X<R.
5 . The light source module of claim 2 , wherein a shape of the patterned reflective layer is a ring shape.
6 . The light source module of claim 2 , wherein the patterned reflective layer has a plurality of openings.
7 . The light source module of claim 2 , wherein the patterned reflective layer has a plurality of irregular patterns, and the irregular patterns are arranged in a manner of surrounding the center of the corresponding secondary lens.
8 . The light source module of claim 1 , wherein each of the secondary lenses is a reflective secondary lens, and the patterned reflective layer covers an upper surface of the corresponding secondary lens.
9 . The light source module of claim 8 , wherein the distribution range of the patterned reflective layer satisfies 1/2R<H<3/2R.
10 . The light source module of claim 8 , wherein the patterned reflective layer is distributed in a range within 2R away from the center of the corresponding secondary lens.
11 . The light source module of claim 8 , wherein the patterned reflective layer is flexible.
12 . The light source module of claim 8 , wherein the patterned reflective layer has at least one opening, and a ratio of an area of the at least one opening to a surface area of the patterned reflective layer is between 20% and 90%.
13 . The light source module of claim 12 , wherein a number of the at least one opening of the patterned reflective layer is plural, and the openings are arranged in a manner of circular symmetry.
14 . The light source module of claim 12 , wherein a number of the at least one opening of the patterned reflective layer is plural, and the openings are irregularly arranged.
15 . The light source module of claim 1 , wherein a reflective index of the patterned reflective layer is between 50% and 100%.
16 . The light source module of claim 1 , wherein the patterned reflective layer is a white reflective layer, a silver reflective layer, an evaporated reflective metal or an ink reflective material.
17 . The light source module of claim 1 , further comprising:
a diffusion plate, located between the at least one optical film and the light source unit.
18 . A light source unit, comprising:
a light emitting element; and
a secondary lens, correspondingly disposed on the light emitting element, and the secondary lens has a patterned reflective layer, wherein the secondary lens has a light hole radius R, a distance between a distribution range of the patterned reflective layer and a bottom of the secondary lens is H, and the distribution range of the patterned reflective layer satisfies 1/3R<H<3/2R.