Abstract: A light power socket adaptor may be positioned between an energy-saving light bulb and a light socket that may provide electrical power to the light bulb. Light power socket adaptors may be network-enabled, and a sensor network may be ZigBee, which is IEEE compliant and can quickly form a mesh network. Each node on the network may operate independently. Each node may also function as a router so that it may forward data packets to other nodes if the data received is targeted for its own consumption. Adaptors may further include a motion sensor as well as a photo (day/night) sensor.

Abstract: Disclosed are methods and apparatus for controlling a lighting system by proximity sensing of a spotlight control device, particularly to controlling a spotlight generated by a lighting system such as a large LED lighting array by means of a spotlight control device. A device is provided for controlling a lighting system by proximity sensing of a spotlight control device, wherein a predefined area around the spotlight control device is illuminated if a proximity sensor signals presence of the spotlight control device within the predefined area.

Abstract: A wireless lighting system, which contains one or more sensor devices and one or more lighting clients. The sensor devices detect actionable events such as movement in a monitored zone and are capable of transmitting a message which is received by the lighting clients. Each lighting client has unique operating characteristics in configured by the end user. A lighting client receives operating input voltage via a standard male screw base such as a standard Edison E27 mm male adapter. A lighting client provides operating voltage to a standard bulb via a female screw receptacle such as a standard Edison E27 mm female adapter. Examples of bulb types include incandescent, LED-based, and compact fluorescent bulbs.

Abstract: A track head unit includes a lighting device, a first sensor, a second sensor, one or more motors, and a controller. The first sensor is configured to receive transmissions from a portable remote control device. The second sensor is configured to receive transmissions associated with a target object. The one or more motors are mechanically coupled to the lighting device and are configured to position the lighting device along a first direction and a second direction. The controller is coupled to the lighting device, the first sensor, the second sensor, and the one or more motors. The controller is configured to receive a control signal from the remote control device via the first sensor, responsively transmit a locator signal to a locator that is disposed at a target object, receive a response signal via the second sensor from the remote object in response to the transmitting, and based upon the response signal, actuate the motors to aim the lighting device at the target object.

Abstract: A control unit (9) for controlling luminance in a space (3), wherein the control unit is configured to estimate a three-dimensional location of at least one target (8) as a function of time, and control the luminance in the space based on the estimated three-dimensional location of the at least one target.

Abstract: The present invention discloses an LED lighting apparatus. The LED lighting apparatus includes a converter for transforming rectified voltage in accordance with a switching operation according to a driving pulse and outputting the transformed voltage, a current regulator for generating the driving pulse having a pulse width varied in response to a control signal and the amount of current of the converter and switching the operation of the converter using the generated driving pulse, and a peripheral circuit module for providing the control signal for controlling the dimming of an LED lighting.

Abstract: A device having built-in digital data means is powered by an unlimited power source for a lamp-holder, LED bulb, light device connected to unlimited power source by prongs or a base that can be inserted into a socket that would otherwise receiving a bulb. The device may take the form of a webcam having auto tracking functions and retractable prongs that plug directly into a wall outlet.

Abstract: The present invention relates to a method of controlling a dimmable luminaire co-arranged with a light sensor at a first level of a room and illuminating a second level of the room, comprising: determining an output path parameter representing a relation between the amount of light emitted from the luminaire and a luminaire illumination value at the second level, which results from the emitted amount of light; and repeatedly: determining an external illumination value at the second level, which external illumination value represents illumination by other sources than the luminaire, by means of values of the presently emitted amount of light, the output path parameter, and light information originating from the light sensor; and controlling the dimming level of the luminaire on basis of the external illumination value in order to meet a predetermined illumination condition for the total illumination at the second level.

Abstract: Plural luminaires are installed in a lighting space surrounded by a wall part. A sensor equipment detects existence or nonexistence of a person in the lighting space. If existence of a person in the lighting space is detected, the sensor equipment detects a direction of the person. The sensor equipment detects a distance between the wall part positioned in front of the direction of the person and the person. A lighting control unit selectively switches between a first control for performing lighting control of the luminaires to illuminate the wall part positioned in front of the direction of the person if the detected distance is a specified distance or less, and a second control for performing lighting control of the luminaires to reduce brightness at a place as the place becomes farther from a position of the person if the detected distance is larger than the specified distance.

Abstract: A luminaire with a light source, controller, and sensors to emit light into an environment is described. The controller may include a processor and memory to analyze data relating to conditions in the environment and to control the light source emitting light. The sensors may be in communication with the controller to detect conditions in the environment and generate data relating to same. The data may be receivable by the controller. Rules affect operation of the luminaire, which may be manipulated using an interface. The luminaire may communicate with devices connected through a network. Light and an auxiliary signal may be emitted substantially simultaneously to provide spatial awareness.

Abstract: An illuminance sensor setting device includes: an illuminance sensor that outputs a signal for switching a lighting apparatus, and a setting unit that performs setting of the illuminance sensor. The illuminance sensor and the setting unit are provided separately from each other, and are connected to signal lines. The setting unit has a configuration to set a sensor address of the sensor, a control address of the lighting apparatus, and an illuminance reference for switching the lighting apparatus. The setting unit transmits to the signal line the setting signal and the sensor address. Thus, even if the illuminance sensor is provided on, for example, the ceiling in the vicinity of the lighting apparatus, the setting unit can be provided at any place, such as a wall, where the setting unit can be easily operated, and work for settings is facilitated.

Abstract: A method for sustaining a plasma includes providing a volume of a gas; generating illumination of a first selected wavelength; and forming a first plasma species in a first region of the gas and a second plasma species in a second region of the gas by focusing the illumination of the first wavelength into the volume of gas, the first region having a first average temperature and a first size, the second region having a second average temperature and a second size, the illumination of the first selected wavelength transmitted by the second plasma species, the illumination of the first selected wavelength absorbed by the first plasma species by tuning the first selected wavelength of the illumination to an absorption line of the first plasma species, the absorption line being associated with an ionic absorption transition or an excited neutral transition of the first plasma species.

Abstract: A backup lighting apparatus includes a light housing having a conductive base selectively connected to a light socket and a bulb portion extending upwardly therefrom that defines an interior area. A processor, battery, light, and audio sensor are situated in the interior area. The audio sensor is configured to detect a predetermined sound. Another sensor in the interior area is configured to detect a power outage and if a light switch is in an “on configuration.” The processor causes the battery to energize the light if a power outage is detected, the light switch is “on,” and a predetermined sound—such a hand clap—is detected. Accordingly, only a room in which a light was already on when an outage occurred and in which a person is present and signals for a backup is illuminated, such that electricity and battery power is conserved.

Abstract: An LED luminaires power supply that isolates dangerous line power from the LED luminaires. The power supply's footprint may enable retrofitting in existing lighting fixtures (e.g., replace ballast in florescent tube troffer). The power supply may individually power a plurality of LED luminaires based on power requirements of the individual LED luminaires. The power supply may receive and interpret TRIAC dimmer signals and/or other lighting protocol commands and provide dimming and/or other lighting scenarios to the LED luminaires. The power supply may include identification readers to read identification and/or power requirements for the LED luminaires being powered thereby (stored in luminaires or in adapters connected to luminaires). The LED luminaires driven by the power supply may include individual lighting fixtures (e.g., LED tubes, LED bulbs), a plurality of LED light arrays in a single light fixture (e.g., LED street lights, LED high hats), or some combination thereof.

Abstract: In accordance with various embodiments, there is provided a light-emitting diode lamp, which includes a body shell, and a light source assembly arranged in a cavity of the body shell. The light source assembly includes a light-emitting diode. The light-emitting diode lamp further includes a thermosensitive sensor, and a photosensitive sensor. The thermosensitive sensor and the photosensitive sensor are independently and automatically configured to detect, respectively, a presence of a person and ambient light near the light-emitting diode lamp.

Abstract: Saving energy includes at least one object sensor that is coupled to at least one light sensing if at least one object is present adjacent to the at least one light. If it is further determined that the time of day corresponds to a desired start-up time, the at least one light may then be illuminated by a control system.

Abstract: This lighting device comprises a light-emitting unit, a reception unit for receiving information from an adjacent lighting device, and a control unit for letting the light-emitting unit emit light according to the information received by the reception unit.

Abstract: The application discloses an illumination apparatus comprising: a light source configured to generate light; a detector configured to detect the posture of an object within a time period and generate a plurality of signals corresponding to this time period; and a processor configured to determine the status of the object within the time period, based on the plurality of signals, and adjust the light source to generate light corresponding to the determined status of the object.

Abstract: An occupancy sensor with a separable override unit can selectively override the operation of the occupancy sensor at designated times and for selected time intervals. The occupancy sensor includes a light sensor to actuate the occupancy sensor and a light assembly when the ambient light is below a predetermined level and to deactivate the occupancy sensor when the ambient light is above a threshold level. The override unit is provided with a light source, such as an LED, to emit light to actuate the light sensor of the occupancy sensor, thereby controlling the occupancy sensor, such as by preventing the occupancy sensor from being actuated. The occupancy sensor includes a cavity for receiving the override unit with the LED aligned with the light sensor: A control unit is operatively connected to one or more override units for selectively controlling the normal operation of the occupancy sensor.

Abstract: Embodiments of methods, apparatuses and systems for identifying an event are disclosed. One method includes sensing motion with a motion sensor, wherein the motion sensor is stationary, and the motion sensor senses motion of an object that is external to the motion sensor. The embodiment further includes matching the sensed motion with one of a plurality of stored patterns of events, and identifying an event associated with the sensed motion based on a match between a one of the plurality of patterns and the sensed motion. One apparatus includes a sensing device, wherein the sensing device includes a light sensor sensing motion and a processor. The processor is configured to match the sensed motion with one of a plurality of stored patterns of events, and identify an event associated with the sensed motion based on a match between a one of the plurality of patterns and the sensed motion.

Abstract: The present invention relates to a lighting control system, comprising a control unit comprising a memory in which control programs are recorded. The control programs are capable of controlling the optical transmission through an active window pane with electro-controllable optical transmission properties and are capable of controlling an electro-controllable lighting device. The system furthermore comprises a coloration sensor for measuring a value representative of a coloration of the light. The control programs are capable of controlling the lighting generated by the lighting device as a function of the value supplied by the coloration sensor.

Abstract: A lighting system includes a light emitting element operable to emit light at a level between zero and 100 percent, a light level sensor positioned to detect a total level of light, and a motion detector positioned to detect a motion in a predefined space. A controller is coupled to the light emitting element, the light level sensor, and the motion detector and is operable to compare a measured total level of light to a set point and to activate the light emitting element in response to the measured total light level being below the setpoint. The controller is further operable to activate the light emitting element in response to the detection of motion within the space.

Abstract: A daylight sensor system includes a power circuit that converts high voltage AC to low voltage DC. The system includes a microcontroller, a motion detector, and a photodiode (PD) integrated circuit (IC). The PD IC provides an output to the microcontroller that is indicative of a lux reading in the vicinity of the system. In response, the microcontroller activates or deactivates a latching relay, which is connected to a line voltage and a load. The motion detector whether the daylight sensor system will be in an active mode of operation or an inactive mode. The microcontroller is programmed so that if the motion detector fails to detect motion for a certain amount of time, the microcontroller will go off line until the motion detector senses motion again.

Abstract: Solid state light sources are compatible with AC phase-cut dimmers. The light sources may have switching mode power supplies having primary and secondary sides that are in first and second circuit parts that are electrically isolated from one another. Information regarding a waveform of input electrical power is extracted in the first circuit part and passed to a controller in the second circuit part by way of a galvanic isolator. Additional isolated paths may be provided to provide bi-directional exchange of information between the first and second circuit parts and/or to provide for the exchange of additional information relevant to control. The signal path from the first side to the second side may have a low latency.

Abstract: A lighting system and method for controlling illumination of the same upon detection of a user in at least one of a first detection area and a second detection area. The lighting system can include a lighting fixture having one or more lighting sources and at least two sensors associated with separate detection areas. Each sensor can send a signal to a controller associated with the lighting fixture, and the controller can be configured to vary the illumination of one or more of the lighting sources depending on the each sensor's detection area. The present subject matter facilitates energy savings since areas away from an occupied area are not illuminated. Communication between neighboring lighting fixtures is not required since each lighting fixture can detect the presence of a user in an area proximate an adjacent lighting fixture in order to trigger illumination of the lighting fixture.

Abstract: An illumination system and methods to control a light source are provided. An illumination system includes a light source, a two-dimensional non-Passive Infrared (non-PIR) imager, and a controller. The light source may provide at least two levels of illumination. The non-PIR imager images an area and to produce image data representative of images across at least part of a visible portion of an electromagnetic spectrum. The controller is communicatively coupled to receive the image data from the non-PIR imager and process the received image data to detect at least one object in the area of a defined type of object. The controller is also coupled to control operation of the light source based on, at least in part, detection of the ambient characteristic of the environment. Alternatively, one or more components of a system may be used to monitor traffic, with or without active illumination.

Abstract: A wireless light control system with control apparatus for stage lights and method thereof are described. The light control apparatus in the wireless light control system communicates with the wireless receiver via a wireless connection. The wireless transmitter transmits the light control command, the scene control command and the procedure control command to the wireless receiver wherein the light control command includes a lighting parameter, a lighting duration parameter, a brightness parameter and light color parameters so that the stage light modules can switches the lighting status, the lighting duration, the brightness and the light colors based on Digital Multiplex 512 (DMX512) of the light control standard protocol. Further, the wireless light control system effectively simplifies the control architecture of the stage light modules.

Abstract: The present invention relates to an automatic lighting control system, and more particularly, to an automatic lighting control system which is capable of predicting a movement route of a resident in a complex building and automatically controlling lighting located in the movement route. According to the present invention, it is possible to reduce power consumption by simplifying configuration of lamps and controlling luminance of lamps on a resident or vehicle movement route by predicting motion of the resident or the vehicle through centralized control for a plurality of lamps, and to provide increased movement convenience and emotional satisfaction of a resident by showing the resident a movement route through lamps and securing a field of view on the movement route.

Abstract: A portable electronic device capable of assuming an open configuration and a closed configuration comprises a primary light sensor and a secondary light sensor. When the portable electronic device is in the open configuration, a light sensor signal is selected from the primary light sensor, and when the portable electronic device is in the closed configuration, a light sensor signal is selected from the secondary light sensor.

Abstract: Systems and methods are disclosed for light sources that use the photo-sensitivity of one or more colored LEDs to determine at least a portion of the emission spectrum of a white light source or other broad spectrum light emitter. As described herein, a white LED or other broad spectrum light emitter can be used as the light source, if desired, along with one or more additional colored LEDs, and the same colored LEDs can be used to emit light and to adjust a color point produced by the light source. Applications for the disclosed embodiments include but are not limited to general lighting, LCD backlighting, projectors, and direct emission displays such as OLEDs and digital billboards.

Abstract: Provided is a heat treatment apparatus in which a large-sized substrate can be rapidly heated and rapidly cooled with high uniformity, and a heat treatment method using the heat treatment apparatus. The heat treatment apparatus includes: a first chamber of which one side is opened; a second chamber of which one side is opened; a device for moving the first and the second chambers; a heating device; a gas introduction port; a gas exhaust port; and a jig for longitudinally fixing a substrate, in which the substrate is rapidly heated while the first and the second chambers are connected, and rapidly cooled by separating the chambers to move the substrate away from a heat storage portion of the heating device or the like. Further, the heat treatment method includes the heat treatment apparatus, and a method for manufacturing a semiconductor device using an oxide semiconductor is included.

Abstract: Provided are an energy harvesting device capable of generating electric energy by effectively obtaining an electromagnetic wave emitted from an indoor lighting device and a power control system of a lighting device capable of performing self-power generation by using the energy harvesting device as a power source. The energy harvesting device using an electromagnetic wave according to an exemplary embodiment of the present disclosure includes: an interface unit made of a conductive material and configured to capture a conductive interference signal transferred through a conductive member of a lighting device; and a rectifier circuit unit configured to rectify the captured conductive interference signal to convert the rectified conductive interference signal to direct current power.

Abstract: A lamp comprising a light emitting device and a controller is disclosed. The controller receives a control signal from a handheld device and switches the light emitting device according to the control signal such that the light emitting device operates in a light emitting mode corresponding to the control signal, in which the control signal is generated by the handheld device according to real-time information.

Abstract: Embodiments of methods, apparatuses and systems for identifying an event are disclosed. One method includes sensing motion with a motion sensor, wherein the motion sensor is stationary, and the motion sensor senses motion of an object that is external to the motion sensor. The embodiment further includes matching the sensed motion with one of a plurality of stored patterns of events, and identifying an event associated with the sensed motion based on a match between a one of the plurality of patterns and the sensed motion. One apparatus includes a sensing device, wherein the sensing device includes a light sensor sensing motion and a processor. The processor is configured to match the sensed motion with one of a plurality of stored patterns of events, and identify an event associated with the sensed motion based on a match between a one of the plurality of patterns and the sensed motion.

Abstract: Apparatuses, methods and systems for dual-technology occupancy detection are disclosed. One dual-technology occupancy detection apparatus includes a motion sensor sensing motion, an ambient light sensor sensing variation in ambient light, and a controller for detecting occupancy and controlling a building environmental parameter based on the sensed motion and the sensed variations in ambient light. One method of detecting occupancy for controlling lighting includes sensing motion with a motion sensor, sensing variations in ambient light with an ambient light sensor, and detecting occupancy and controlling activation of a light based on the sensed motion and the sensed variations in ambient light.

Abstract: A solution is provided in which one or more of a plurality of light elements is alternately operated as a light emitting element and a light detecting element. For example, a system can operate a light element as a light detecting element while operating at least one other light element as a light emitting element in order to manage operation of the light elements to generate light having a set of desired attributes, evaluating an operating condition of the other light element(s), and/or the like.

Abstract: Modular light fixtures and methods for constructing modular light fixtures are provided. A modular light fixture in one embodiment comprises a first end section having a first housing and a first lamp holder, a second end section having a second lamp holder, and a ballast located in an interior of the first housing. The modular light fixture also includes at least one environmental sensor configured to sense at least one environmental condition and an electronic control circuit configured to receive a signal indicative of the at least one environmental condition sensed by the at least one environmental sensor. The first lamp holder is configured to support a first end of a lamp and the second lamp holder is configured to support a second end of the lamp.

Abstract: To provide both a photodetecting element and a photodetecting device which can prevent generating of a plurality of current paths, and can detect with stability and high sensitivity regardless of a surface state instability of an optical absorption layer. The photodetecting element includes an optically transparent substrate, an optical absorption layer, an electrode, an electrode, an adhesive layer, an insulating film, and a package. The optical absorption layer is formed on the optically transparent substrate, and a part of each the electrodes is embedded in the optical absorption layer. The photodetecting unit is bonded junction down with the adhesive layer on the package. The optical absorption layer absorbs light of a specified wavelength selectively to be converted into an electric signal. The light to be measured is irradiated from a back side surface of the optically transparent substrate.

Abstract: Solid state light sources are compatible with AC phase-cut dimmers. The light sources may have switching mode power supplies having primary and secondary sides that are in first and second circuit parts that are electrically isolated from one another. Information regarding a waveform of input electrical power is extracted in the first circuit part and passed to a controller in the second circuit part by way of a galvanic isolator. Additional isolated paths may be provided to provide bi-directional exchange of information between the first and second circuit parts and/or to provide for the exchange of additional information relevant to control. The signal path from the first side to the second side may have a low latency.

Abstract: A luminaire with a light source, controller, and sensors to emit light into an environment is described. The controller may include a processor and memory to analyze data relating to conditions in the environment and to control the light source emitting light. The sensors may be in communication with the controller to detect conditions in the environment and generate data relating to same. The data may be receivable by the controller. Rules affect operation of the luminaire, which may be manipulated using an interface. The luminaire may communicate with devices connected through a network. Light and an auxiliary signal may be emitted substantially simultaneously to provide spatial awareness.

Abstract: A light emitting diode (LED) power supply system includes a photoelectric conversion element, an electric energy storage element, a PWM signal output element, and an LED driving unit. The photoelectric conversion element is configured for converting solar energy into electric energy. The electric energy storage element stores the electric energy from the photoelectric conversion element. The PWM signal output element and LED driving unit are both powered by the storage element. The PWM signal output element is configured to output pulse signals of different widths based on different controls of the LED to the LED driving unit, and the LED driving unit is configured to receive and convert the pulse signals into driving signals for the LED.

Abstract: An outdoor LED (light emitting diode) system includes an LED device, a storage battery storing an electric energy therein and connected to the LED device to provide an electric power to the LED device, a solar energy generator connected to the storage battery to provide an electric power to the storage battery, and a wind power generator connected to the storage battery to provide an electric power to the storage battery. Thus, the electric power of the LED device is supplied by two types of natural energy, including the solar energy and the wind energy, to prevent from incurring an environmental pollution so as to satisfy the requirements of environment protection.

Abstract: Provided are an illumination lighting apparatus that provides various and intuitional light in response to a motion of a user, and an illumination controlling method. The illumination lighting apparatus may include a lamp unit including at least one light emitting part that is selectively turned on and off, a motion sensing unit including at least one motion sensor, transmitting a sensed signal when the at least one motion sensor senses a motion of a user, and enabling the lamp unit to provide a light corresponding to the sensed signal, and a control unit to receive the sensed signal from the motion sensing unit to adjust a light emitting type of the lamp unit in a plurality of modes, and the motion sensing unit may transmit, based on a mode of the control unit, different sensed signals to the control unit to change the light emitting type of the lamp unit.

Abstract: This disclosure provides systems, methods, and apparatus for illumination systems with natural and artificial light inputs. In one aspect, an apparatus can include a natural light collection system, an artificial light collection system, an illumination panel, and a control system. The illumination panel can be optically coupled to the natural light collection system and the artificial light collection system to receive natural and artificial light. The control system can be coupled to the artificial light system and can be configured to control the artificial light system.

Abstract: A system and device for and a method of programming and controlling light fixtures is disclosed. A system in accordance with the present invention includes a stationary controller unit that is electrically coupled to the light fixtures. The stationary controller unit is configured to be remotely programmed with a portable commissioning device to automatically control the lights fixtures. The stationary controller unit and the portable commissioning device include light sensors, micro-computers and transceivers for measuring light levels, running programs, storing data and transmitting data between the stationary controller unit and the portable commissioning device. In operation, target light levels selected with the portable commissioning device and the controller unit is remotely programmed to automatically maintain the target level.

Abstract: An illuminance sensor setting device 5 includes: an illuminance sensor 51 that outputs a signal for switching a lighting apparatus 2, and a setting unit 52 to perform setting of the illuminance sensor 51. The illuminance sensor 51 and the setting unit 52 are provided separately from each other, and are connected to signal lines 6. The setting unit 52 has a configuration to set a sensor address of the sensor 51, a control address of the lighting apparatus 2, and an illuminance reference for switching the lighting apparatus 2. The setting unit 52 transmits to the signal line 6 the setting signal and the sensor address. Thus, even if the illuminance sensor 51 is provided on, for example, the ceiling in the vicinity of the lighting apparatus 2, the setting unit 52 can be provided at any place, such as a wall, where the setting unit 52 can be easily operated, and work for settings is facilitated.

Abstract: Solid state light sources are compatible with AC phase-cut dimmers. The light sources may have switching mode power supplies having primary and secondary sides that are in first and second circuit parts that are electrically isolated from one another. Information regarding a waveform of input electrical power is extracted in the first circuit part and passed to a controller in the second circuit part by way of a galvanic isolator. Additional isolated paths may be provided to provide bi-directional exchange of information between the first and second circuit parts and/or to provide for the exchange of additional information relevant to control. The signal path from the first side to the second side may have a low latency.

Abstract: A color manager for use with a luminaire constituted of a plurality of different colored light emitting diode based sub-luminaires arranged to produce a combined light. The color manager is constituted of a sampler arranged to output an electrical representation of the optical output of the luminaire, a converter coupled to the output of said sampler and operatively associated with a current selector arranged to select the driving current level of the luminaire from a plurality of current levels. The converter is arranged to convert said electrical representation to a pre-determined calorimetric system in cooperation with a calibration matrix whose values are selected responsive to the selected driving current level. The color manager further comprises a driver operatively associated with the luminaire, the converter and current selector and arranged to drive the luminaire in accordance with the driving current level as selected by the selector.

Abstract: A load control system controls a lighting load provided in a space and comprises a load control device and one or more occupancy sensors. The load control device controls the load in response to the wireless control signals received from the occupancy sensors. Each occupancy sensor transmits an occupied control signal to the load control device in response to detecting an occupancy condition in the space and a vacant control signal to the load control device in response to detecting a vacancy condition. The load control device adjusts the intensity of the load to a first intensity in response to receiving the occupied control signal from at least one of the occupancy sensors, and adjusts the intensity of the load to a second intensity less than the first intensity (e.g., a non-off intensity) in response to receiving vacant control signals from both of the occupancy sensors.

Abstract: The output uniformity of a display device, such as a self light emitting display device, is improved by detecting the emitted brightness of pixels of the display device using an external detection system, controlling the pixel intensity to determine the non-uniformity of the driver circuits connected with the pixels, and generating a calibration factor for the pixels to modify the output of the driver circuits. Calibration can be performed for each pixel, or each group of pixels, such as each row and column of pixels.