Light source module
A light source module including a light emitting element, a tunable-focal length lens and a controller is provided. The light emitting element is configured to emit a light beam. The tunable-focal length lens is disposed on a transmission path of the light beam. The controller is coupled to the tunable-focal length lens, and adjusts a characteristic of the tunable-focal length lens in a first status and a second status.
1. A light source module, comprising:
a light emitting element, configured to emit a light beam;
a tunable-focal length lens, disposed on a transmission path of the light beam; and
a controller, coupled to the tunable-focal length lens, and adjusting a characteristic of the tunable-focal length lens in a first status and a second status,
wherein
in the first status, the light beam penetrating through the tunable-focal length lens has a first color temperature,
in the second status, the light beam penetrating through the tunable-focal length lens has a second color temperature,
wherein the first color temperature is different to the second color temperature.
2. The light source module as claimed in claim 1 , wherein
in the first status, the controller provides a first voltage to the tunable-focal length lens, and the light beam penetrating through the tunable-focal length lens has a first light shape,
in the second status, the controller provides a second voltage to the tunable-focal length lens, and the light beam penetrating through the tunable-focal length lens has a second light shape,
wherein the first voltage is different to the second voltage.
3. The light source module as claimed in claim 1 , wherein the tunable-focal length lens is a liquid state lens or a liquid crystal tunable-focal length lens.
4. The light source module as claimed in claim 1 , wherein the tunable-focal length lens has a light output surface, wherein the characteristic is a shape of the light output surface,
in the first status, the light output surface of the tunable-focal length lens has a first shape,
in the second status, the light output surface of the tunable-focal length lens has a second shape,
wherein the first shape is different to the second shape.
5. The light source module as claimed in claim 1 , wherein the tunable-focal length lens has a light output surface,
in the first status, a path of the light beam transmitted from the light emitting element to the light output surface is a first optical path,
in the second status, a path of the light beam transmitted from the light emitting element to the light output surface is a second optical path,
wherein a length of the first optical path is different to a length of the second optical path.
6. The light source module as claimed in claim 1 , further comprising: a plurality of light diffusion structures, disposed in the tunable-focal length lens.
7. The light source module as claimed in claim 1 , further comprising: an environmental parameter sensor, configured to sense an environmental parameter of an environment where the light source module is located, and the controller provides a voltage to the tunable-focal length lens according to the environment parameter.
8. The light source module as claimed in claim 1 , further comprising: a secondary lens, disposed at a light path downstream of the tunable-focal length lens.
9. The light source module as claimed in claim 3 , wherein the tunable-focal length lens is the liquid crystal tunable-focal length lens, the characteristic is an arrangement state of the liquid crystal tunable-focal length lens,
in the first status, the arrangement state of liquid crystal molecules of the liquid crystal tunable-focal length lens is a first arrangement state,
in the second status, the arrangement state of the liquid crystal molecules of the liquid crystal tunable-focal length lens is a second arrangement state,
wherein the first arrangement state is different to the second arrangement state.