BACKGROUND

Modern lighting devices have electronic light sources for emitting light, such as one or more light emitting diode (LED) components. Typically, the brightness of an LED light source is at least partially related to the speed in which heat can be transferred away from the LED component. For example, it may be desirable to maintain the temperature of the LED under about 105° Celsius for improved or maximum light output and efficiency. However, certain lighting devices such as, but not limited to, room or area lighting devices, may be configured to be mounted in an enclosed environment, such as in a housing and/or in a recess of a ceiling, wall or other structure. In those or other contexts, the lighting device may be mounted in a thermally contained or poorly ventilated environment that can inhibit the ability to quickly transfer heat away from the LED. Accordingly, it can be desirable to provide lighting device configurations that allow for sufficient transfer of heat from the LED light source to maintain the temperature of the light source at or below a threshold temperature during operation and, particularly, during operation in a thermally contained or poorly ventilated environment.

Lighting device assemblies of various examples described herein can be configured to have good heat transfer characteristics (to transfer and dissipate heat away from the LED), while also allowing the lighting device assembly to be located within a housing and/or within a recess or opening in a ceiling, wall or other object. In other examples, the lighting device assembly may be surface mounted on a surface of a ceiling, wall or other object, or mounted on a pedestal or other support structure extending from a ceiling, wall, or other object. In yet other examples, the lighting device assembly may be mounted in other suitable locations or environments.

SUMMARY

An example of a lighting device system includes at least one lighting device module, where each lighting device module includes a module housing having an inner volume, at least one inner surface at least partially surrounding the inner volume, a first open end and a second end. Each module further includes a movable heat sink member configured to be received within the inner volume of the module housing, at least one rail on at least one of the at least one inner surface of the module housing or on the movable heat sink member, and at least one groove on the other of the at least one inner surface of the module housing or the movable heat sink member, the at least one groove receiving the at least one rail when the movable heat sink member is received within the inner volume of the module housing. The movable heat sink member is slidably movable along the at least one rail or the at least one groove. A light source is attached to the heat sink member for directing light out of the first open end of the module housing, the light source being movable with the heat sink member to change a tilt angle of the light source with movement of the heat sink member.

In further examples of the lighting device system, the at least one rail is provided on the at least one inner surface of the module housing, and wherein the at least one groove is provided on the movable heat sink member.

In further examples of the lighting device system, the at least one rail has an arc shape to guide the movable heat sink member in an arc-shaped path of movement.

Further examples of the lighting device system further include an optic member having a center of focus, where the optic member is arranged to receive light from the light source and to emit at least some of the light toward the first open end of the module housing, and where the arc shape of the at least one rail forms an arc of a circle having a center corresponding to the center of focus of the optic member.

Further examples of the lighting device system further include at least one biasing device for pressing a surface of the at least one groove with a surface of the at least one rail when the movable heat sink member is received within the inner volume of the module housing, to improve thermal communication between the heat sink member and the module housing. In further examples of the lighting device system, the at least one biasing device comprises at least one spring-biased ball or plunger partially extending from a second surface of each groove.

Further examples of the lighting device system include an optic member arranged to receive light from the light source and to emit at least some of the light toward the first open end of the module housing, where the optic member is attached to the movable heat sink member and movable with the movable heat sink member. The movable heat sink member is slidably moveable along a range of motion between a first position in which the optic member emits light in an axial direction of the module housing and a second position in which the optic member emits light at an oblique angle relative to the axial direction of the module housing.

In further examples of the lighting device system the module housing has an opening that receives a portion of the heat sink member to increase the oblique angle at which the optic member emits light when the heat sink member is in the second position.

In further examples of the lighting device system the heat sink member has a first surface on which the light source is mounted, the heat sink member has a second surface that faces an inner surface of the module housing when the heat sink member is in the second position, and the second surface of the heat sink member defines an oblique angle relative to the first surface of the heat sink member, to increase the oblique angle at which the optic member emits light when the heat sink member is in the second position.

In further examples of the lighting device system the module housing has an opening that receives a portion of the heat sink member to further increase the oblique angle at which the optic member emits light when the heat sink member is in the second position.

In further examples of the lighting device system the module housing includes a first housing side and a second housing side, where the first and second housing sides are separable and connectable to each other. Each housing side has one of the inner surfaces that at least partially surrounds the inner volume when the first and second housing sides are connected, on which the at least one rail or the at least one groove is provided.

In further examples of the lighting device system, the module housing defines an axis extending from the first end to the second end, and wherein the first and second housing sides are separable on a plane along the axis of the module housing.

Further examples of the lighting device system include at least one tensioning ring that surrounds the module housing to help hold the first and second housing sides together, where each of the first and second housing sides has at least one recessed groove section that forms an annular groove in which the at least one tensioning ring is located when the first and second housing sides are connected.

In further examples of the lighting device system, the at least one lighting device module comprises a plurality of lighting device modules.

Further examples of the lighting device system further include a base plate having at least one opening through which the plurality of lighting device modules are selectively received and held, or selectively removed from a received position.

Further examples of the lighting device system further include a cover member that covers the base plate and the plurality of lighting device modules, the base plate being supported for rotation relative to the cover member.

Further examples of the lighting device system further include a trim panel connected to the plurality of lighting device modules, and at least one lens connected to the trim panel. Further examples relate to a method of making a lighting device system including making a lighting device module including providing a module housing having an inner volume, at least one inner surface at least partially surrounding the inner volume, a first open end and a second end. The method further includes receiving a movable heat sink member within the inner volume of the module housing. The method further includes providing at least one rail on at least one of the at least one inner surface of the module housing or on the movable heat sink member, providing at least one groove on the other of the at least one inner surface of the module housing or the movable heat sink member, and receiving the at least one rail in the at least one groove when the movable heat sink member is received within the inner volume of the module housing, to allow the movable heat sink member to be slidably movable along the at least one rail or the at least one groove. The method further includes attaching a light source to the heat sink member for directing light out of the first open end of the module housing, the light source being movable with the heat sink member to change a tilt angle of the light source with movement of the heat sink member.

In further examples, the method further includes pressing a surface of the at least one groove and a surface of the at least one rail together with a biasing device, when the movable heat sink member is received within the inner volume of the module housing, to improve thermal communication between the heat sink member and the module housing.

In further examples, the method further includes providing a base plate having at least one opening through which the plurality of lighting device modules are selectively received and held, or selectively removed from a received position, covering the base plate and the plurality of lighting device modules with a cover member, and supporting the base plate for rotation relative to the cover member.

