A lighting engine, system and method of fabrication are described. The system contains a flexible printed circuit (FPC) shaped as a loop. LEDs are mounted on the FPC to emit light toward a center of the loop. A light guide positioned in an interior of the loop receives light emitted by the LEDs through an edge of the light guide. The light guide has slots formed therein that receive locator pins to limit thermal displacement of the light guide towards the LEDs. Other apparatuses, systems, and methods are also disclosed.

A lighting engine, system and method of fabrication are described. The engine contains a chassis having a side wall and bottom surface that define a cavity. A recess is formed in the bottom surface. A flexible printed circuit (FPC) is on the side wall and LEDs are mounted on the FPC to emit light toward a center of the cavity. A light guide positioned within the cavity receives light emitted by the LEDs through an edge of the light guide. A gasket disposed within the recess is in contact with a first surface of the light guide. A reflector within the cavity is adjacent to a second surface of the light guide opposite the first surface of the light guide. A backplate is attached to the chassis and configured to seal the cavity. Other apparatuses, systems, and methods are also disclosed.

A lighting engine, system, and method of fabrication are described. The system includes a chassis with a ridge extending from a bottom that defines inner and outer cavities. A flexible printed circuit (FPC) is disposed in contact with a wall of the inner and outer cavities and on the ridge top and is connected to wiring retained within bosses in the outer cavity. LEDs are mounted on the FPC to emit light toward a center of the cavity. A light guide disposed has an edge that opposes the LEDs and receives light emitted by the LEDs. The FPC has a polyimide insulator coupled with a pressure-sensitive adhesive (PSA), a copper layer on the polyimide insulator, and a high-reflectivity white coverlay on the copper layer. Other apparatuses, systems, and methods are also disclosed.

Disclosed herein are a backlight unit and a display device using the same. In an embodiment, the backlight unit includes a substrate, at least one light source on the substrate, a lenses placed over the light source, a reflection sheet in which at least one through hole corresponding to the lens is formed, and a reflection ring comprising an opening portion corresponding to the at least one light source, and placed between the lens and the substrate. In accordance with an embodiment of the present invention, luminance uniformity of the backlight unit can be improved because the reflection ring surrounding the light source is included.

A display screen and a display device are provided. The display screen includes a display panel assembly, a light bar, and a reflective layer. The display panel assembly includes at least two display panels with a splicing gap between each two display panels. The light bar is attached to a display surface of the display panel assembly, covers the splicing gap, and has two opposite side surfaces extending along a length of the splicing gap. At least one side surface of the light bar is provided with the reflective layer to prevent black borders from appearing on the side surfaces of the light bar.

Disclosed herein are a backlight unit and a display device using the same. In an embodiment, the backlight unit includes a substrate, at least one light source on the substrate, a lenses placed over the light source, a reflection sheet in which at least one through hole corresponding to the lens is formed, and a reflection ring comprising an opening portion corresponding to the at least one light source, and placed between the lens and the substrate. In accordance with an embodiment of the present invention, luminance uniformity of the backlight unit can be improved because the reflection ring surrounding the light source is included.

A method and device for variable-beam illumination are disclosed. The device has a light source, a first reflector segment, and a second reflector segment. The first segment has a first parabolic cross section to produce a first light distribution having a wide-angle light distribution. The second segment has a second parabolic cross section to produce a second light distribution that is narrower than the first light distribution. At least one of the first and second segments is movable between first and second positions. At least a portion of the light is reflected to effectuate the first light distribution when the at least one of the first and second segments is in the first position. At least a portion of the light is reflected to effectuate the second light distribution when the at least one of the first and second segments is in the second position.

Various arrangements for light distribution incorporated as part of a device are presented. A circular light guide may be used that receives light from a plurality of light emitters that can be arranged in a circular pattern. A conical reflector may be used and may be positioned to reflect light emitted from the circular light guide onto an exterior of a case of the device. The conical reflector may reflect light such that light is reflected by the exterior of the case in the shape of a halo into an ambient environment of the device.

A pointer includes an LED device, a case, and a partition. The case houses the LED device. The case includes a light emission hole through which light from the LED device is emitted to an external space. The partition is located between the LED device and the light emission hole in the case. The partition includes a light passage hole through which the light from the LED device passes. The light passage hole and the light emission hole are disposed on a central axis of the LED device.

The invention provides a reflector lamp comprising a light source, a lens or a reflector arranged coaxially with the light source in a spaced-apart fashion, and a push-push adjustment assembly for varying a beam angle of the light beam in a push manner. The push-push adjustment assembly comprises a frame coupled fixedly to the lamp, an actuator in operative connection with the lens or the reflector, wherein the actuator movably rests in the frame so that the movement of the actuator enables the lens or the reflector to slide relative to the light source thereby to provide variable axial spacing between the lens or the reflector and the light source, and a push-push latch mechanism coupled to the actuator and/or the frame to move the actuator in the frame.