The present invention relates to a lighting device (11) comprising a light emitting portion with at least two solid state light sources, SSL (18). The light emitting portion includes a first cover member (12a) with a first light source carrier (13a) and a first light transmitting portion (14), a second cover member (12b) with a second light source carrier (13b) and a second light transmitting portion (14). The first and second cover member are arranged such that a first light transmitting portion is aligned with the second SSL to allow transmission of light emitted from the second SSL through the first cover member, and a second light transmitting portion is aligned with the first SSL to allow transmission of light emitted from the first SSL through the second cover member. According to this design, light emitted from an SSL on one cover member will be transmitted through the other cover member. Dissipation of heat from each SSL may be provided in the other direction, i.e. in a direction opposite to the light emitting direction of each SSL.

A lamp base includes a housing for at least partial accommodation of a carrier for a light source. Two mutually-opposing guide rails are provided in the housing for the form-fitted insertion of the carrier. The technology is particularly applicable to carriers with LEDs as light sources and addresses problems with adhesive or soldered attachment of the light source carrier.

A lighting device may include: a board having a front surface and a back surface, and a board attachment base provided with an attachment surface smaller than the area of the back surface, an opposing surface larger than the area of the attachment surface and which opposes the attachment surface, and a lateral surface which extends out from the periphery of the attachment surface towards the periphery of the attachment surface, the board having a light source mounted in a section of the back surface region which is not abutted by the attachment surface.

A light engine for a semiconductor lamp comprises a substrate and at least two groups of LED chips arranged on the substrate. The LED chips of a first group are adapted to emit light having a first color and the LED chips of a second group are adapted to emit light having a second color different from the first color

The invention has a lamp arrangement (800), a casing (801) of the lamp arrangement, a cooling arrangement (814) and a light source unit (809). The light source unit has an elongated piece (811), to the side of which a light source (805) is attached, and a rear reflector (804). The elongated piece has a cooling channel (808), which extends through the light source unit. The light source unit has a reflective surface (806), which is arranged to reflect light in the direction of illumination, and additionally, the reflective surface is open in the direction of the rear reflector. Thus, light leaving from the light source in the direction of the rear reflector can be reflected by the rear reflector. Between the casing (807) of the light source unit and the casing of the lamp arrangement is a second cooling channel (802), which is in connection with the cooling arrangement.

A LED lighting device comprises a lighting body extending along an axis and internally provided with a chamber housing a LED light source and is delimited by at least one lateral wall consisting of a diffuser having an outer surface defining an emission surface of the device; the diffuser is an opaline diffuser having a transmission coefficient greater than or equal to 50% and a reflection coefficient greater than or equal to 45%.

An LED lamp includes a lamp base for insertion into a reflector of an automotive front lighting assembly; a panel extending from the lamp base with a first vertical side facing into one half of the reflector and a second vertical side facing into the other half of the reflector; a primary light source including a set of LED dies on each vertical side of the panel; a two-part shield including a first shield half shielding the LED dies on the first vertical side of the panel and a second shield half shielding the LED dies on the second vertical side of the panel. The two-part shield essentially has the form of a shield in a functionally equivalent filament lamp for providing a low beam. A lighting arrangement includes such an LED lamp; a reflector to receive the lamp; and an electrical interface for connecting to a controller.

The application relates to the field of OLED lighting, and provides a high-yield low-cost large-area flexible OLED lighting module, a manufacturing method thereof and an OLED lighting luminaire.

An LED filament including at least one filament substrate. The at least one filament substrate each includes at least two substrate sections connected in sequence. The substrate has two opposite light-emitting surfaces. The light-emitting surfaces of adjacent substrate sections are twisted with respect to each other around the axis which is along the extending direction of the filament substrate. On the light-emitting surfaces LED light-emitting elements are provided. The LED filament structure can facilitate heat dissipation and comprises a plurality of light-emitting surfaces oriented in different directions, so that the LED filament can emit light toward a plurality of angles so as to have a more uniform and omni-directional light-emitting effect. In addition, the LED light-emitting elements on the plurality of filaments can also be electrically connected in different manners, such that LED light-emitting elements of different colors can be provided, thereby realizing the control of multiple light-emitting effects.

A light emitting device filament includes a substrate, light emitting device chips, two electrode pads, and connection lines. The substrate includes a first surface and a second surface opposite to the first surface. The substrate extends in a first direction and has a width in a second direction. The light emitting device chips are disposed on the first surface of the substrate. The two electrode pads are disposed on the substrate. The connection lines electrically connect the light emitting device chips and the electrode pads. At least one of the connection lines includes a first portion extending in the first direction and a second portion extending in the second direction.