A light source device includes: blue, green, and red laser light sources; a first retardation plate that controls polarization of blue laser light emitted from the blue laser light source; a polarizing beam splitter that separates the blue laser light whose polarization is controlled by the first retardation plate into a first blue laser light and a second laser light; a second retardation plate that controls polarization of the second blue laser light separated by the polarizing beam splitter; a fluorescent plate that is excited by the first blue laser light separated by the polarizing beam splitter and emits fluorescent light including a green component and a red component; a first dichroic mirror that combines the second blue laser light whose polarization is controlled by the second retardation plate and light emitted from the green and red laser light sources, to generate combined laser light; a dynamic diffuser plate that diffuses the combined laser light combined by the first dichroic mirror to generate diffused laser light; and a second dichroic mirror that combines the diffused laser light diffused by the dynamic diffuser plate and the fluorescent light emitted from the fluorescent plate.

A light guide assembly includes a light guide plate and a light guide strip around the periphery of the light guide plate, where a plurality of light-transmitting holes are formed on one side of the light guide strip facing to the light guide plate, and at least one end of the light guide strip is an light incident side. The light is incident to the inside of the light guide strip from the light incident side, and then is incident into the light guide plate from the light-transmitting holes on the side of the light guide strip, and thus becomes a surface light source.

Light emitting panel assemblies and panel members for light emitting panel assemblies are provided. In some embodiments, a light source can be positioned to provide light to the panel member at an input area along a primary surface of the panel member without requiring light to be input from an edge surface of the panel member. Light emitted into the panel member can be refracted, reflected, diffused, and/or transmitted from the panel member based on the refractive, reflective, and other optical properties of the panel member to provide a desired light output, such as a uniform light output along at least a portion of the primary surfaces of the panel member. In some embodiments, the light emitting assembly can include surface coatings, treatments, reflectors, and/or materials to manage the refraction, reflection, diffused and/or transmitted of light in the panel member.

Light emitting panel assemblies and panel members for light emitting panel assemblies are provided. In some embodiments, a light source can be positioned to provide light to the panel member at an input area along a primary surface of the panel member without requiring light to be input from an edge surface of the panel member. Light emitted into the panel member can be refracted, reflected, diffused, and/or transmitted from the panel member based on the refractive, reflective, and other optical properties of the panel member to provide a desired light output, such as a uniform light output along at least a portion of the primary surfaces of the panel member. In some embodiments, the light emitting assembly can include surface coatings, treatments, reflectors, and/or materials to manage the refraction, reflection, diffused and/or transmitted of light in the panel member.

A fluorescent plate including a fluorescent phase which emits fluorescence by excitation light, and a plurality of voids, wherein, in a cross section of the fluorescent plate including cross sections of the voids, voids having an equivalent circle diameter of 0.4 micrometers or greater and 50 micrometers or smaller have a standard deviation in equivalent circle diameter of 1.5 or less.

A light guide assembly includes a light guide plate and a light guide strip around the periphery of the light guide plate, where a plurality of light-transmitting holes are formed on one side of the light guide strip facing to the light guide plate, and at least one end of the light guide strip is an light incident side. The light is incident to the inside of the light guide strip from the light incident side, and then is incident into the light guide plate from the light-transmitting holes on the side of the light guide strip, and thus becomes a surface light source.

A portable lighting tower includes a frame, a mast coupled to the frame including a light, a plurality of legs coupled to the frame, each leg including an actuator operable to deploy and retract the respective leg, a controller operatively coupled to the actuators and configured to control operation of the actuators, and a tilt sensor operably coupled to the controller and configured to generate a tilt signal indicative of a tilt of the portable lighting tower relative to horizontal. The controller is configured to determine a grade of the portable lighting tower based on the tilt signal, determine an extended length of each leg based on the determined grade of the portable lighting tower, and, after determining the extended length of each leg, operate each of the actuators to deploy the respective leg from a storage configuration to the determined extended length.

An optical structure for controlling distribution of light generated by a light source is described. The optical structure includes a primary optics disposed relative to the light source and configured to reflect light generated by the light source towards a target region. The optical structure also includes a secondary optics disposed and aligned relative to the primary optics. The secondary optics is configured to at least partially block light generated by the light source from illuminating a region outside the target region.

A portable lighting tower includes a frame, an adjustable mast, multiple legs, a controller, and a battery pack. The adjustable mast is coupled to the frame and includes a light. The multiple legs each include an actuator operable to deploy and retract the respective leg. The controller is operatively coupled to the light and the actuators and configured to control operation of the light and the actuators. The battery pack is electrically coupled to the controller, the light, and the actuators. The light is dimmable between a maximum setting and a minimum setting, and the controller operates each of the linear actuators to deploy or retract the respective leg response to a user input.

A portable lighting tower includes a frame, an adjustable mast, multiple legs, a controller, and a battery pack. The adjustable mast is coupled to the frame and includes a light. The multiple legs each include an actuator operable to deploy and retract the respective leg. The controller is operatively coupled to the light and the actuators and configured to control operation of the light and the actuators. The battery pack is electrically coupled to the controller, the light, and the actuators. The light is dimmable between a maximum setting and a minimum setting, and the controller operates each of the linear actuators to deploy or retract the respective leg response to a user input.