Abstract: In accordance with certain embodiments, an unpackaged inorganic LED die is adhered directly to a yielding substrate with a pressure-activated adhesive notwithstanding any nonplanarity of the surface of the unpackaged inorganic LED die or non-coplanarity of the contacts thereof.

Abstract: In various embodiments, an illumination system includes multiple light-emitting strings that are selectively activated or deactivated to regulate an overall output of the array.

Abstract: In accordance with certain embodiments, a semiconductor die is adhered directly to a yielding substrate with a pressure-activated adhesive notwithstanding any nonplanarity of the surface of the semiconductor die or non-coplanarity of the semiconductor die contacts.

Abstract: In accordance with certain embodiments, an illumination system comprising a plurality of power strings features elements facilitating compensation for failure of one or more light-emitting elements connected along each power string.

Abstract: A system topology and circuit design for efficiently and stably driving currents through strings of solid state light emitting elements by providing current sources that are controlled by a stable voltage reference.

Abstract: The present invention provides a method and apparatus for adaptive control of a solid-state lighting system consisting of one or more groups of one or more light-emitting elements The invention comprises a voltage control device to provide each group with an independently controllable voltage A feedback system to detect and generate a signal representative of drive currents through the one or more groups A computing device then adaptively evaluates, based on the signal, a required voltage that achieves a desired respective drive current in each of the one or more groups.

Abstract: A composite patterning device includes a stiff first layer having a Young's modulus in a first range, a flexible second layer having a Young's modulus in a second range, a fluidic layer interposed between the first and second layers and having a Young's modulus in a variable range, and a relief pattern in the second layer. The device can be used for establishing conformal contact between the relief pattern in the second layer and a contact surface of a host substrate with attached elements. Then, a magnetic field is applied to the device so as to increase the Young's modulus of the fluidic layer to be similar to that of second layer after which a force is applied to the contact surface so as to release and remove the elements from the host substrate by withdrawing the device.

Abstract: The present invention provides an integrated self-contained lighting module which can be used on its own, or in conjunction with other modules to produce white light, or light of any other colour within the colour spectrum. Each module comprises one or more light-emitting elements, a drive and control system, a feedback system, thermal management system, optical system, and optionally a communication system enabling communication between modules and/or other control systems. Depending on the configuration, the lighting module can operate autonomously or its functionality can be determined based on either or both internal signals and externally received signals.

Abstract: A light-emitting element control system is described comprising a series connection of one or more LEE units, each comprising one or more LEEs and a unit activation module. The unit activation module associated with a LEE unit is configured to controllably activate, in response to a unit activation control signal, the one or more LEEs in that unit. A control module is operatively coupled to each of the unit activation modules and configured to provide the unit activation control signals thereto. A converting module is operatively coupled to the series connection of LEE units, adapted for connection to a source of power and configured to provide a drive current to the LEE units.

Abstract: The present invention provides an integrated power and control unit for use with a solid-state lighting device. The integrated power and control unit comprises a power input and a data input. The power input receives power from a power source, wherein this power is configured in a first power format and the data input receives control data from a control data source, wherein the control data is configured in a first data format. The integrated power and control unit further comprises a translation device coupled to the power input and the data input. The translation device is configured to convert the power in the first power format to power in a second power format and further configured to convert the control data in the first data format to control data in a second data format.

Abstract: The present invention provides a method and apparatus for adaptive control of a solid-state lighting system consisting of one or more groups of one or more light-emitting elements The invention comprises a voltage control device to provide each group with an independently controllable voltage A feedback system to detect and generate a signal representative of drive currents through the one or more groups A computing device then adaptively evaluates, based on the signal, a required voltage that achieves a desired respective drive current in each of the one or more groups.

Abstract: The present invention provides a method and apparatus for scaling the average drive current supplied to a light-emitting element or string thereof by coupling a scaling signal to an original control signal thereby generating an effective control signal for control of the light-emitting element(s). The scaling signal can be a modulated signal, for example a Pulse Width Modulation (PWM) signal, Pulse Code Modulation (PCM) signal, or other signal and modifies the original control signal to produce an effective control signal. The effective control signal is subsequently used to control the supply of power to the light-emitting element(s) from a power source via a switching device. The effective control signal essentially modifies the ON time of the light-emitting element(s), thereby modifying the average drive current passing through the light-emitting element(s).

Abstract: The present invention provides a method and apparatus for controlling the correlated colour temperature (CCT) or colour of light produced by an array of light-emitting elements by providing multiple selectable paths for the flow of drive current. The apparatus includes a primary path comprising primary light-emitting elements, and one or more secondary paths comprising secondary light-emitting elements that are used for compensation or correction of the colour of light emitted by the primary light-emitting elements. A plurality of control means, for example switches are used to direct current through particular paths. During operation, the drive current primarily flows through the primary light-emitting elements and is redirected, periodically for example, to a secondary path comprising light-emitting elements of a particular colour that is desired in addition to the colour produced by the primary light-emitting elements.

Abstract: The driving and control device provides a desired switched current to a load including two or more strings of one or more electronic devices. The device includes one or more voltage converters which convert the magnitude of the voltage from the power supply to another magnitude that is desired at the high side of the load. The device may also include one or more dimming controls which provide control of the activation and deactivation of the load. The device may further include a feedback signal to the voltage converter that is indicative of the current flowing through the load. Based on the feedback signal received, the voltage converter can subsequently adjust its output voltage such that a constant switched current is provided to the load.

Abstract: The driving and control device according to the present invention provides a desired switched current to a load including a string of one or more electronic devices, and comprises one or more voltage conversion means, one or more dimming control means, one or more feedback element and one or more sensing means. The voltage conversion means may be a DC-to-DC converter for example and based on an input control signal converts the magnitude of the voltage from the power supply to another magnitude that is desired at the high side of the load. The dimming control element may comprise a switch such as a FET, BJT, relay, or any other type of switching device, for example, and provides control for activation and deactivation of the load.

Abstract: A light-emitting element control system is described comprising a series connection of one or more LEE units, each comprising one or more LEEs and a unit activation module. The unit activation module associated with a LEE unit is configured to controllably activate, in response to a unit activation control signal, the one or more LEEs in that unit. A control module is operatively coupled to each of the unit activation modules and configured to provide the unit activation control signals thereto.

Abstract: The present invention provides a system and method for generating light using light-emitting elements and detecting the intensity and spectral power distribution of light using the same light-emitting elements as spectrally sensitive photodetectors. The light-emitting elements function in two modes, an ON mode and an OFF mode, wherein in the ON mode the light-emitting elements are activated and emit light of a particular frequency or range of frequencies. When in the OFF mode, the light-emitting elements are deactivated, wherein they do not emit light but serve to detect photons incident upon them thus generating an electrical signal representative of the intensity and spectral power distribution of the incident photons. The detected signal from the deactivated light-emitting elements can be used to provide photonic feedback to a lighting system, and thereby may be used to control the brightness and color balance of the lighting system.

Abstract: The present invention provides a luminaire system capable of generating light of a desired chromaticity and luminous flux output during continuous operation with varying ambient operating temperature. The luminaire system can be further capable of maintaining a desired correlated colour temperature during dimming of the luminaire. The luminaire system comprises one or more arrays of light-emitting elements for generating light with a current driver system coupled thereto for selectively supplying electrical drive current to each of the arrays, wherein the current driver system is responsive to drive signals received from a controller. The luminaire system further comprises an optical sensor system for generating optical signals representative of chromaticity and luminous flux output of the light. A heat sensing system is operatively coupled to the one or more arrays for generating signals representative of the junction temperatures of arrays of light-emitting elements during operation.

Abstract: The present invention provides an integrated self-contained lighting module which can be used on its own, or in conjunction with other modules to produce white light, or light of any other colour within the colour spectrum. Each module comprises one or more light-emitting elements, a drive and control system, a feedback system, thermal management system, optical system, and optionally a communication system enabling communication between modules and/or other control systems. Depending on the configuration, the lighting module can operate autonomously or its functionality can be determined based on either or both internal signals and externally received signals.

Abstract: The driving and control device according to the present invention provides a desired switched current to a load including a string of one or more electronic devices, and comprises one or more voltage conversion means, one or more dimming control means, one or more feedback means and one or more sensing means. The voltage conversion means may be a DC-to-DC converter for example and based on an input control signal converts the magnitude of the voltage from the power supply to another magnitude that is desired at the high side of the load. The dimming control means may comprise a switch such as a FET, BJT, relay, or any other type of switching device, for example, and provides control for activation and deactivation of the load. The feedback means is coupled to the voltage conversion means and a current sensing means and provides a feedback signal to the voltage conversion means that is indicative of the voltage drop across the current sensing means which thus represents the current flowing through the load.