摘要:
A system (100) for controlling a plurality of light sources (104a-f) by means of light groups, wherein each light group synchronously controls a subset of the plurality of light sources. The system (100) comprises: a central controller (102); a plurality of light sources (104a-f) wired to the central controller (102); and a light sensor (106a-c) wired to the central controller (102). The central controller (102) is configured to: receive a measurement signal from the light sensor; based on the received measurement signal, determine a subset of light sources that are in optical contact with the light sensor; and include the subset of light sources in a light group associated with the light sensor.
摘要:
The invention relates to embedding data symbols of a data signal into a luminance output of an illumination device. The device includes a controller configured for receiving a first base pattern and a second base pattern within a frame period, and generating a shifted second pattern by phase shifting the second base pattern within the frame period with respect to the first base pattern in response to the data signal such that the data symbols are embedded in the luminance output of the device. The device also includes a first light source configured to generate a first luminance output in response to the first base pattern and a second light source configured to generate a second luminance output in response to the shifted second pattern. The first and second luminance outputs have different output spectra and the luminance output of the illumination device comprises both the first and second luminance outputs. With this approach, the short-time average light output of the illumination device remains constant, decreasing the visible flicker and allowing the use of lower switching frequencies relative to the prior art approaches.
摘要:
The invention relates to the controlling of a lighting system with a plurality of light sources, particularly to the semi-automatic commissioning of light sources of the lighting system or controlling of the creation of lighting scenes with the lighting system. A basic idea of the invention is to use a spatial coding of light for controlling a lighting system, particularly for commissioning of light sources of the lighting system instead of or in addition to the temporal light coding as applied in the prior art. An embodiment of the invention relates to a system for controlling a lighting system with a plurality of light sources (1, 2) comprising a light system controller (5) for controlling the light sources in that a spatial light pattern (11, 12, 21, 22) is created, which codes one or more attributes (512) of the light sources (511), and a light pattern capturing device (3) for capturing the created spatial light pattern and communicating (32, 52) with the light system controller (5) in order to enable the controlling of the one or more light sources based on the captured spatial light pattern. A spatial coding is particularly suitable for wallwasher light sources, and thus especially assists personnel in commissioning wallwasher light sources of a lighting system.
摘要:
A driver circuit for driving loads such as LED, OLED or LASER diode devices includes a switching converter that has a switching element and reactive elements to provide an output switching voltage by sequential switching operations of the switching element. The load is connected to the output switching voltage. A linear current driver circuit is connected in series to the load and includes an amplification element and a feedback circuit with a current control input. In order to enable the circuit to be easily used, a control unit is provided with a sensing input for a current or voltage at the linear current driver. A microcontroller executes a control program for processing the sensing input and providing both a current control output and a switching control output, set in accordance with a set current value.
摘要:
Disclosed is a light module package including a mounting substrate for mounting and electrically contacting at least one light emitting diode and a ceramic layer disposed in a path of light emitted by the light emitting diode. The ceramic layer includes a wavelength converting material and the light emitting diode is disposed between the ceramic layer and the mounting substrate. The light module package also includes a light sensor disposed at the mounting substrate for detecting a luminous output of the light emitting diode in order to control the brightness and/or the color of the light leaving the light module. The ceramic layer is only partly translucent to shield the light sensor against ambient light.
摘要:
Devices (1) comprise receivers (11) for receiving signals (4) coming from signal-systems (5) at objects (3) and comprise converters (12) for converting the signals (4) into control information (7, 8) for controlling light-systems (2) for illuminating the objects (3). The signal-system (5) may comprise a sensor (51, 52) for sensing light (41-44) and for providing sensing information and a transmitter (53) for transmitting the signal (4) comprising the sensing information to the device (1). Alternatively the signal-system (5) may comprise a reflector (54) for converting light (41-44) into reflected light or may comprise a light source (55) for providing light (56), whereby the receiver (11) comprises a sensor (19) for sensing the reflected light or the light (56) and for providing the sensing information (7, 8). The device (1) may comprise an analyzer (14) for analyzing the sensing information (7, 8) and a memory (15) for storing location information and/or light information and/or signal-system information and a generator (16) for generating search information for letting the light-system (2) search for the signal-system (5).
摘要:
An MR apparatus has a resonant circuit, which is formed by an MR receiving coil (L1) and a capacitor (C1), and has an electronic control circuit (S) for switching the resonant circuit between two or more operating modes. The invention proposes that the electronic control circuit (S) be connected with a receiving device (L2) for wireless reception of a high-frequency electromagnetic control signal.
摘要:
The present invention deals with a process for the manufacturing of reflecting optical barriers comprising silicon and useful in combination with light emitting devices, wherein the process comprises anisotropic wet etching of the silicon material in such a manner that the rate of etching along the crystallographic (111) plane of the silicon material is slower than the rate of etching along the (110) and (100) planes. The present invention further comprises a reflecting optical barrier useful in combination with light emitting devices and a system containing at least one light emitting device comprising a reflecting optical barrier.
摘要:
A piezoelectric driving device and a regulation method for a piezoelectric driving device are proposed. Piezoelectric driving devices known so far show a characteristic with which the electric power applied to the motor drops when the load increases. This behavior, which leads to a strong reduction of the range of use of such motors, is counteracted by predefining the amplitude of the excitation voltage so that the effective power does not drop with increasing load. For this purpose the electrical effective power is determined from the excitation voltage and the current flowing through the piezoelectric resonator. Alternatively, with a predefined fixed phase angle between excitation voltage and current a regulation may also be effected in the way that the current is kept to the constant value. A further aspect of the invention relates to a unit for limiting the current flowing through the piezoelectric resonator, so as to avoid this component being damaged.
摘要:
A circuit arrangement for commutating the AC voltage of a plasma display panel, in which the losses and electro-magnetic interference which occur as a result of the influence of parasitic resistances (coils, supply lines, semiconductor switches) and the attendant hard charging and discharging processes, are substantially avoided. For the charging operation of the capacitor (Cp) of the plasma cells the oscillation circuit is supplied with an auxiliary charging voltage (u1) whose value exceeds 50% of the input voltage (U0). The oscillation circuit for the discharging operation is supplied with an auxiliary discharging voltage (u2) whose value falls short of 50% of the input voltage (U0). The two auxiliary voltages are connected to a DC converter.