Lumileds LLC

Asm International N.v.

Koninklijke Philips Corporation N.v.

Pieter Johannes Quintus Van Voorst Vader

Nicola Bettina Pfeffer

Arjen Gerben Van Der Sijde

Yourii Martynov

Erno Fancsali

Dzmitry Viktorovich Aliakseyeu

Peter Josef Schmidt

Peter Johannes Martinus Bukkems

Simon Eme Kadijk

Jonathan David Mason

Ronald Johannes Bonne

Charles André Schrama

Christianus Gerardus Maria De Ridder

Marcus Hendrikus Adrianus Van Steen

Maarten Josef Teepen

Arjen Van Der Sude

Emanuel Nicolaas Hermanus Johannus Stassar

An imaging system can automatically measure a distance to an object. A camera, having a field of view that includes the object, can define a camera longitudinal axis that extends to a center of the field of view. An illuminator, defining an illuminator longitudinal axis that is substantially parallel to the camera longitudinal axis and is laterally offset from the camera longitudinal axis, can illuminate the object with an illumination field. The illumination field can have an illumination field central axis that is angularly offset from the illuminator longitudinal axis by an angle that depends at least in part on the measured distance to the object to at least partially compensate for parallax error caused by the lateral offset between the illuminator longitudinal axis and the camera longitudinal axis. The camera can capture an image of the object while the illuminator illuminates the object with the illumination field.

Parallax correction for illumination system and method

A light-emitting diode (LED) array illuminates different objects in, for example, a commercial environment. A camera captures an image of each object under different lighting conditions. Feedback is used by processing circuitry for each image to determine the lighting parameters of the LED array to obtain optimum lighting conditions and the lighting parameters stored. When a new object is illuminated, the lighting parameters for the object are retrieved and used. The lighting parameters may change dependent on ambient conditions, including lighting and time of day.

Auto adjusted light source

A semiconductor light-emitting device has an emitter matrix with an arrangement of emitter cells interspersed with non-emitter cells. The emitter cell has a semiconductor emitter, and a non-emitter cell does not have a semiconductor emitter. A number of bond pads for connection to a power supply and a plurality of wirebonds are present. Each wirebond extends from a bond pad to the semiconductor emitter of an emitter cell. An imaging arrangement includes a light source for illuminating a scene. The light source has a pair of such semiconductor light-emitting devices. A method of manufacturing such a semiconductor light-emitting device is also described.

Semiconductor light emitting device

A projection system can include a housing. A controller can receive a video signal and, in response to the video signal, produce a light-emitting diode (LED) array-controlling signal and a modulation panel-controlling signal. An LED array disposed in the housing can include LEDs that are configured to produce LED light having corresponding time-varying intensities in response to the LED array-controlling signal. A modulation panel disposed in the housing can have a plurality of pixels that are configured to modulate corresponding portions of the LED light in response to the modulation panel-controlling signal to form intensity-modulated light. A lens disposed in or on the housing can project the intensity-modulated light out of the housing to form a video image that corresponds to the video signal. The video image can be located away from the housing.

Projector with local dimming

A sensor can sense time-varying ambient light that is present in a scene to produce an ambient light signal. A processor can determine an ambient light frequency and an ambient light phase of the ambient light signal. Light-emitting diodes (LEDs) of an LED array can be electrically powered with pulse-width modulation (PWM) electrical signals having a same amplitude to produce illumination. Each LED can illuminate a respective region of the scene. Each PWM electrical signal can have a respective duty cycle that corresponds to a specified illumination intensity in a respective region of the scene. The PWM electrical signals can have a same PWM frequency that is an integral multiple of the ambient light frequency. Each PWM electrical signal can have a respective PWM phase that is synchronized to the ambient light phase. A lens can direct the illumination toward the scene to illuminate the scene.

Adaptive flash with pulse width modulation

A method includes capturing a first image of a scene, detecting a face in a section of the scene from the first image, and activating an infrared (IR) light source to selectively illuminate the section of the scene with IR light. The IR light source includes an array of IR light emitting diodes (LEDs). The method includes capturing a second image of the scene under selective IR lighting from the IR light source, detecting the face in the second image, and identifying a person based on the face in the second image.

Adaptive light source

A method according to embodiments of the invention includes creating a three-dimensional profile of a scene, calculating a relative amount of light for each portion of the scene based on the three-dimensional profile, and activating a light source to provide a first amount of light to a first portion of the scene, and a second amount of light to a second portion of the scene. The first amount and the second amount are different. The first amount and the second amount are determined by calculating a relative amount of light for each portion of the scene.

The invention describes an infrared imaging assembly () for capturing an infrared image (M, M) of a scene (S), comprising an infrared-sensitive image sensor (); an irradiator () comprising an array of individually addressable infrared-emitting LEDs, wherein each infrared-emitting LED is arranged to illuminate a scene region (S, . . . , S); a driver () configured to actuate the infrared irradiator () by applying a switching pulse train (T, . . . , T) to each infrared-emitting LED; an image analysis module () configured to analyse a preliminary infrared image (M) to determine the required exposure levels () for each of a plurality of image regions (R, . . . , R); and a pulse train adjusting unit () configured to adjust the duration (L, . . . , L) of a switching pulse train (T, . . . , T) according to the required exposure levels (). The invention also described a method of generating a depth map (D) for a scene (S); a depth map generator comprising an embodiment of the inventive infrared imaging assembly (); and a camera comprising such a depth map generator ().

Pulse chain-driven infrared imaging assembly

Methods and apparatus for driving an emitter array are described. A method includes determining a thermal environment profile for a plurality of emitters of the emitter array, computing a current pulse profile for at least one of the plurality of emitters based on the thermal environment profile, and applying a current pulse with the computed current pulse profile to the at least one of plurality of emitters.

Method of driving an emitter array

The invention describes a semiconductor die comprising at least a first light-emitting diode and a second light-emitting diode, wherein the first light-emitting diode comprises a first diode formed in a first die area and a first phosphor layer deposited over the first die area; the second light-emitting diode comprises a second diode and a second phosphor layer deposited over the second die area; the first diode and the second diode are electrically connected in anti-parallel; and wherein the optical properties of the second phosphor layer differ from the optical properties of the first phosphor layer.

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Son, Netherlands

Pieter Johannes Quintus Van Voorst Vader