Lumileds LLC

Gregory Donald Guth

Frederic Stephane Diana

Jeroen Den Breejen

Yifeng Qiu

Alan Andrew McReynolds

Michael Wasilko

Nazila Soleimani

Yourii Martynov

Thierry De Smet

Oleg Borisovich Shchekin

Jyoti Kiron Bhardwaj

Erno Fancsali

Yiwen Rong

Iain Black

Ting Zhu

Emo Fancsali

Alan Andrew Mcreynolds

A light engine and system are disclosed in which the light engine contains a core comprising an opening extending through opposing surfaces and a flexible printed circuit board (PCB). The PCB includes a flexible body disposed on an outside of the core and having independently addressable sets of illumination sources mounted thereto, and flexible legs extending from the body and through the opening. The legs are bent such that a terminal portion of each leg is substantially parallel to the opposing surfaces of the core. Independent control of the sets of illumination sources is provided via the legs. The body is separated into segments, each on a different section of the outside and containing body contacts electrically independent of the body contacts of each other segment. Each leg is associated with a different segment, and contains leg contacts on the terminal portion in electrical contact with the associated body contacts.

Light engines with dynamically controllable light distribution

An apparatus and system are disclosed and include a vehicle interior lighting system comprising that includes a light engine with a plurality of independently addressable light emitting diode (LED) segments, each independently addressable LED segment including at least one LED, a flexible printed circuit board (PCB) having a base and plurality of legs extending from the base, each leg supporting an independently addressable LED segment, and a light guide plate configured to provide illumination from the plurality of independently addressable LED segments inside the vehicle. A processor may be configured to receive information from a o vehicle sensing system, a vehicle communication system, or a detection system, and may generate a signal. A controller may be configured to provide one or more light control signals to modify at least one light characteristic of at least one of the plurality of independently addressable LED segments based on the signal.

A method to make light-emitting diode (LED) units include arranging LEDs in a pattern, forming an optically transparent spacer layer over the LEDs, forming an optically reflective layer over the LEDs, and singulating the LEDs into LED units. The method may further include, after forming the optically transparent spacer layer and before singulating the LEDs, forming a secondary light-emitting layer that conforms to the LEDs, cutting the LEDs to form LED groups having a same arrangement, spacing the LED groups on a support, and forming the optically reflective layer in spaces between the LED groups.

Flip-chip SMT LEDs with variable number of emitting surfaces

A method, apparatus, and system are disclosed for increasing light extraction efficiency in a light guide optical system. The light guide optical system may comprise a light emitting source. The light emitting source may be, for example, a light-emitting diode (LED) or plurality of LEDS. The light guide optical system may also comprise a light guide plate (LGP). The LGP may include light extraction features located on surfaces of the LGP. The LGP may also include a shaped injection surface on an input surface of the LGP. The shaped injection surface may be angled to deviate near-parallel light emitted from the LED to enable the near-parallel light emitted from the LED to be extracted from the LGP via the light extraction features. The shaped injection surface may be a split edge (i.e. a V-groove) or a curved edge.

Shaping input surfaces of LED light-guides for increased light extraction efficiency

A mounting substrate has a patterned metal layer defining a plurality of top metal bond pads for bonding to bottom metal bond pads of LED dies. A solder mask layer is formed over the mounting substrate, where the mask has openings that expose the top metal bond pads and protects metal traces on the substrate. The mask layer is a highly reflective white paint. The exposed top metal bond pads are then wetted with solder. The LED dies' bottom metal bond pads are then soldered to the exposed top metal bond pads, such that the mask layer surrounds each LED die to reflect light. A reflective ring is affixed to the substrate to surround the LED dies. A viscous phosphor material then partially fills the ring and is cured. All downward light by the LED dies and phosphor is reflected upward by the ring and solder mask layer.

Reflective solder mask layer for LED phosphor package

A method, apparatus, and system are disclosed for increasing light extraction efficiency in a light guide optical system. The light guide optical system may comprise a light emitting source. The light emitting source may be, for example, a light-emitting diode (LED) or plurality of LEDS. The light guide optical system may also comprise a light guide plate (LGP). The LGP may include light extraction features located on surfaces of the LGP. The LGP may also include a shaped injection surface on an input surface of the LGP. The shaped injection surface may be angled to deviate near-parallel light emitted from the LED to enable the near-parallel light emitted from the LED to be extracted from the LGP via the light extraction features. The shaped injection surface may be a split edge (i.e., a V-groove) or a curved edge.

A lighting device and method of forming the lighting device are provided. The lighting device includes a light guide, a lighting element having a light emitting diode (LED), and an in-coupling structure. The in-coupling structure includes one or more remote phosphor regions and one or more reflective regions. The in-coupling structure is integrally formed in a single piece. The in-coupling structure is affixed to the light guide and the lighting element, and is positioned between the light guide and the LED. An optional seal may be a part of the integrally formed in-coupling structure.

LED lighting device with remote phosphor in-coupling structure for in-coupling light from light emitting diodes

A flexible printed circuit board and method of fabrication are disclosed. The flexible printed circuit board has a flexible body with multiple segments. Each segment has multiple body contacts that are electrically isolated from body contacts of each other segment. The flexible printed circuit further has multiple flexible legs in which each leg extends from a different segment and contains multiple leg contacts disposed proximate to a distal end of the leg from the body. Each leg contact is connected with a different body contact of the leg. The flexible printed circuit board is formed from a multilayer structure that includes: a dielectric layer, a metal layer adjacent to the dielectric layer, and a solder mask layer adjacent to the metal layer, the solder mask layer exposing portions of the metal layer to form the body contacts.

Light fixture with dynamically controllable light distribution

In one embodiment, an overhead street light (a luminaire) is formed that has an asymmetric light intensity distribution, where the peak intensity is greatest along the direction of the street, lower directly across the street, and much lower on the house side of the street. Around the edge of a circular transparent light guide are white light LEDs that inject light into the light guide. To help control the asymmetry of the light intensity distribution, sawtooth-shaped grooves are formed in the light guide surface opposite to the light-emission surface and parallel to the street. Gaussian diffusers are used to partially diffuse the light. By proper selection of the grooves, the Gaussian diffuser, and the relative amounts of light emitted by LED segments around the light guide, the desired asymmetrical light intensity distribution is achieved while a direct view of the light exit surface appears as a uniform light.

Asymmetrical light intensity distribution from luminaire

A light engine is disclosed in which the light engine contains a core having an opening extending completely therethrough and independently addressable LED segments. The opening defines an inner surface of the core. Each segment has LEDs and is attached to a flexible PCB. The PCB has a flexible body attached to one of an inner or outer surface of the core and to which the segments are mounted, and flexible legs extending from the body, along the core, and traverse and adjacent to the other of the inner or outer surface. A light guide plate (LGP) receives and guides light from the segments so that the light exits to provide illumination. The segments emit light in all directions of a plane created by the LGP. A reflector opposes and covers a top surface of the LGP and the segments and reflects light from the LGP back into the LGP.

A light fixture includes a core having an opening; a flexible printed circuit board (PCB) supported by the core; a plurality of LED segments multiple LEDs mounted on the flexible PCB; and a light guide plate (LGP) having an opening within which the core is fitted, such that the LEDs emit light in all directions of a plane defined by the LGP, such light exiting the LGP to provide illumination.

Light fixture with light guide and radially emitting LEDs

A light engine system is disclosed in which the light engine system comprises a light engine. The light engine comprises independently addressable LED segments, each LED segment comprising LEDs and a flexible PCB to which the segments are attached. A light guide plate (LGP) is provided into which light from the segments is introduced, in which the light is guided, and from which the light exits to provide illumination. The segments emit light in all directions of a plane created by the LGP. A diffuser opposes a first surface of the LGP over substantially the entirety of the LGP. The diffuser diffuses light exiting the LGP into the environment away from the light engine.

Growing community of inventors

San Jose, CA, United States of America

Gregory Donald Guth