Embodiments of the disclosure provide a backlight module using MJT LEDs and a backlight unit including the same. More specifically, embodiments of the disclosure provide a backlight module, which includes MJT LEDs configured to increase an effective light emitting area of each of light emitting cells and optical members capable of uniformly dispersing light emitted from the MJT LEDs. In addition, embodiments of the disclosure provide a backlight unit using the backlight module, thereby reducing the number of LEDs constituting the backlight unit while allowing operation at low current.

The present invention provides a lamp unit including an optical member, a base assembly disposed to be spaced a predetermined distance from the optical member with a space therebetween, a light source disposed on the base assembly, and a lens coupled to the base assembly to cover the light source, wherein the lens includes a first protrusion having a first contact surface in contact with one surface of the base assembly and a second contact surface formed at a height different from that of the first contact surface to be in contact with the other surface of the base assembly, and a second protrusion having a third contact surface disposed to be spaced apart from the first protrusion and configured to be in contact with the base assembly, and thus may provide an advantageous effect in that the lens is prevented from being shaken on a substrate as well as being moved on or falling off of the substrate.

A backlight device 12 includes: optical members with a substantially circular profile, including a light guide plate 14, optical sheets 15, and a reflective sheet 16; a chassis 13 (lamination member) disposed to overlap the light guide plate 14, the optical sheets 15, and the reflective sheet 16 (optical members); and positioning structures. The positioning structures are provided on the light guide plate 14, the optical sheets 15, and the reflective sheet 16 (optical members) and on the chassis 13 (lamination member). The positioning structures have contact faces that come into contact with each other in the circumferential direction of the light guide plate 14, the optical sheets 15, and the reflective sheet 16 (optical members), so as to position the light guide plate 14, the optical sheets 15, and the reflective sheet 16 (optical member) relative to the chassis 13 (lamination member) in the circumferential direction.

An illumination device includes a laser source, a conventional diffuser element, and an extender optic with a curved interior surface and a curved outer surface. Light emitted by the laser source with a given field of illumination (FOI) is received by the conventional diffuser element and outputted towards the interior surface of the extender optic with an increased FOI; the outer surface of the extender optic then outputs the light received by the interior surface as light with an even greater FOI, typically in the range of 120° to 185°.

Disclosed is a dock light assembly for illuminating a trailer interior. The dock light assembly may include a cylindrical housing having an illumination source therein, and an optical lens secured to an end of the housing. The optical lens may be configured to provide focused illumination to the trailer interior. A rotationally self-correcting screen device may be positioned between the illumination source and the optical lens. The screen device may be configured to absorb a portion of the focused illumination such that illumination to an upper portion of the trailer interior is reduced. The rotationally self-correcting screen device remains in a horizontal orientation even if the housing is rotated. One benefit of the disclosed dock light assembly is that forklift operators working in the trailer interior are shielded from high intensity light, even though the lower portion of the trailer interior remains brightly lit.

A lighting apparatus comprising a single point-like light source, preferably a LED, and a transmissive lens structure optically connected to said light source defining a plurality of optically functional, mutually different segments dedicated for controlling the light, e.g. distribution and direction, originally emitted by said single light source. A corresponding transmissive element is presented.

A lighting device is disclosed with excitation light source(s) for emitting excitation light along an excitation light path; a wavelength conversion assembly including wavelength conversion element(s) for converting the excitation light into conversion light and emitting it into the same half-space from which the excitation light is radiated onto the surface of the element, and reflection element(s) for reflecting, in unconverted fashion, the excitation light intermittently radiated onto the reflection element from the source(s) along the portion of the excitation light path onto a reflection light path as reflection light; and a dichroic mirror for deflecting the excitation light coming from the source(s) onto the portion of the excitation light path on which the excitation light is radiated onto the wavelength conversion element(s) or the reflection element(s). The mirror is configured such that the conversion light is transmitted through the mirror and the reflection light is guided past the mirror.

A precision approach path indicator (PAPI) employs an LED light source with first and second arrays of LEDs or other efficient light sources, disposed one above the other and emitting their respective color lights along an optic axis to a collimating lens of focal length f. First and (optional) second aperture plates positioned along the optic axis, each being a respective frame with a cut-out defining a horizontally elongated aperture for light passing along the optic axis. Intermediate aperture plate(s) can be positioned between the first and second aperture plates. The first frame is positioned between the light source and the collimating lens at the focal distance f from the lens. The optional second aperture plate is positioned at the collimating lens and covers top, bottom, and side edge portions of the lens. A planar blade extends from the light source to the first frame and has a distal edge extending across the aperture of the first aperture plate, substantially at the focus of the collimating lens, dividing the beam into white and red sectors. The intermediate aperture plate(s) can be adjusted for optimal separation. The PAPI can be considered to have an illumination portion formed of the light source(s), blade, and first frame; and an imaging portion formed of an enclosure and a lens positioned at its focal length distant from the front frame aperture and edge of the blade.

Imitation candle devices and systems with enhanced features enable simulation of a realistic candle flame using multiple angled light sources that illuminate a surface area of a movable imitation flame element in a controlled manner. In some implementations, the imitation candle devices further include a color detection module that adjust the color of the imitation candle device based on a sensed color of the surface a surface that the candle rests upon.

A luminaire includes a housing with a cavity, a non-planar lens, and a light emitter. The non-planar lens is coupled to the housing. The lens defines a generally circular footprint and a concavo-convex shape. The light emitter is positioned proximate an edge of the cavity and is configured to emit light into an edge of the lens and toward a center of the cavity.