A lighting system includes various ballasts or LED drivers having respective dimming interface circuits coupled in parallel to an external dimming device. Each device includes a controller regulating output to a lighting load based on desired dimming output. Dimming interface circuits coupled are between the controller and the external dimming device, each configured to dynamically adapt a level of constant current sourced from the dimming interface circuit to the external dimming device via first and second interface terminals, based on a determined analog mode or digital mode associated with the external device. The dimming interface circuit generates dimming control signals to the controller based on dimming input signals received via the first and second interface terminals, and in a digital mode, the interface circuit generates digital pulse signals to the external dimming device via the interface terminals for bidirectional communications therewith.

A composite film is disclosed. The composite film includes a substrate, a thermal barrier layer located on top of the substrate, wherein the thermal barrier layer has a higher decomposition temperature than the substrate, and a thin film located on top of the thermal barrier layer, wherein the thin film is to be thermally processed by a pulsed light from a flashlamp.

A composite film is disclosed. The composite film includes a substrate, a thermal barrier layer located on top of the substrate, wherein the thermal barrier layer has a higher decomposition temperature than the substrate, and a thin film located on top of the thermal barrier layer, wherein the thin film is to be thermally processed by a pulsed light from a flashlamp.

A discharge lamp drive device includes a discharge lamp driver adapted to supply a drive current to a discharge lamp, a control section adapted to control the discharge lamp driver, and a storage section adapted to store a plurality of drive patterns of the drive current. Each of the drive patterns has a plurality of drive parameters. The plurality of drive patterns includes a first drive pattern and a second drive pattern different from each other in a value of at least one of the plurality of drive parameters. The control section is configured to execute the first drive pattern and the second drive pattern in accordance with at least one of accumulated lighting time of the discharge lamp and an individual of the discharge lamp in a case in which an inter-electrode voltage of the discharge lamp is at a predetermined voltage value.

A discharge lamp drive device includes a discharge lamp driver adapted to supply a drive current to a discharge lamp, a control section adapted to control the discharge lamp driver, and a storage section adapted to store a plurality of drive patterns of the drive current. Each of the drive patterns has a plurality of drive parameters. The plurality of drive patterns includes a first drive pattern and a second drive pattern different from each other in a value of at least one of the plurality of drive parameters. The control section is configured to execute the first drive pattern and the second drive pattern in accordance with at least one of accumulated lighting time of the discharge lamp and an individual of the discharge lamp in a case in which an inter-electrode voltage of the discharge lamp is at a predetermined voltage value.

A discharge lamp drive device includes a discharge lamp driver adapted to supply a drive current to a discharge lamp having a first electrode and a second electrode, a control section adapted to control the discharge lamp driver, and a storage section adapted to store a plurality of drive patterns of the drive current. The control section is adapted to select one drive pattern of the plurality of drive patterns based on machine learning, and execute the selected drive pattern.

A discharge lamp drive device includes a discharge lamp driver adapted to supply a drive current to a discharge lamp having a first electrode and a second electrode, a control section adapted to control the discharge lamp driver, and a storage section adapted to store a plurality of drive patterns of the drive current. The control section is adapted to select one drive pattern of the plurality of drive patterns based on machine learning, and execute the selected drive pattern.

The current subject matter relates to a lighting device that can be installed in an already existing fixture in a structure. The lighting device can include a light emitting diode (LED) lighting segment and a fluorescent lighting segment. The LED lighting segment can include a LED lighting source, and the fluorescent lighting segment can include a fluorescent lighting source. The LED lighting source can be activated. Motion sensors and/or occupancy sensors can detect motion and/or occupancy of an occupant in the structure. If there is motion or if the occupancy is more than a predetermined threshold, the fluorescent lighting source can be activated. After each regular interval of time, the detection of motion or occupancy can be re-performed. If there is no detection of motion and/or occupancy, the fluorescent lighting source can be deactivated, after a period of time. Related apparatus, systems, techniques and articles are also described.

The current subject matter relates to a lighting device that can be installed in an already existing fixture in a structure. The lighting device can include a light emitting diode (LED) lighting segment and a fluorescent lighting segment. The LED lighting segment can include a LED lighting source, and the fluorescent lighting segment can include a fluorescent lighting source. The LED lighting source can be activated. Motion sensors and/or occupancy sensors can detect motion and/or occupancy of an occupant in the structure. If there is motion or if the occupancy is more than a predetermined threshold, the fluorescent lighting source can be activated. After each regular interval of time, the detection of motion or occupancy can be re-performed. If there is no detection of motion and/or occupancy, the fluorescent lighting source can be deactivated, after a period of time. Related apparatus, systems, techniques and articles are also described.

According to an aspect of the invention, a discharge lamp driving device includes a discharge lamp driving section, a control section, and a voltage detecting section. The control section is configured to execute a first discharge lamp driving for executing a first control and a second control for supplying a driving current including a direct current and an alternating current to a discharge lamp. In the first discharge lamp driving, the control section executes the first control when the interelectrode voltage is equal to or smaller than a first threshold voltage at predetermined setting timing and executes the second control when the interelectrode voltage is larger than the first threshold voltage at the predetermined setting timing. A rate of the direct current in the second control is larger than a rate of the direct current in the first control.