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 is a reflective secondary lens, and the patterned reflective layer only covers an upper surface of the corresponding secondary lens, and
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 the distribution range of the patterned reflective layer satisfies 1/2R<H<3/2R.
3. The light source module of claim 1 , wherein the patterned reflective layer is distributed in a range within 2R away from the center of the corresponding secondary lens.
4. The light source module of claim 1 , wherein the patterned reflective layer is flexible.
5. The light source module of claim 1 , 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%.
6. The light source module of claim 5 , 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.
7. The light source module of claim 5 , wherein a number of the at least one opening of the patterned reflective layer is plural, and the openings are irregularly arranged.
8. 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 is a refractive secondary lens, the patterned reflective layer is disposed only on a circumference of an upper surface of the corresponding secondary lens, and the patterned reflective layer has a ring profile, and
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.
9. The light source module of claim 8 , wherein the patterned reflective layer has a plurality of openings located in the ring profile.
10. The light source module of claim 8 , 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 to form the ring profile.