52results about How to "Lighting is limited" patented technology

The present invention provides an optical switch in which a switching operation is not affected even when the polarization state of a control light varies. The optical switch comprises a loop-form optical waveguide loop circuit formed from an optical nonlinear medium, control light input means of phase control means for inputting the control light into the optical waveguide loop circuit, a wavelength demultiplexing / multiplexing circuit, and a phase bias circuit. The optical waveguide loop circuit is constituted by an optical path formed from a first polarization-maintaining single-mode fiber extending from an optical demultiplexer / multiplexer to the control light input means, an optical path formed from a second polarization-maintaining single-mode fiber extending from the control light input means to the wavelength demultiplexing / multiplexing circuit, and an optical path formed from a fourth polarization-maintaining single-mode fiber extending from the wavelength demultiplexing / multiplexing circuit and returning to the optical demultiplexer / multiplexer. The wavelength demultiplexing / multiplexing circuit is formed as a loop-form optical waveguide loop circuit by a third polarization-maintaining single-mode fiber connecting a wavelength demultiplexer and a multiplexer, a fifth polarization-maintaining single-mode fiber connecting the wavelength demultiplexer and a polarization plane rotation portion, and a sixth polarization-maintaining single-mode fiber connecting the polarization plane rotation portion and the multiplexer. The phase bias circuit is inserted at a point on any one of the first through fourth polarization-maintaining single-mode fibers.

A sanitizing system uses ultraviolet light within a housing having an interior chamber. When items such as shopping carts or wheel chairs are moved into and out of the interior chamber, a cover is moved to reduce the light shining out of the housing. The cover is coordinated with the door of the housing to limit light shining on the users of the system. In another configuration, a switch is used to turn off the light source to reduce the light shining out of the housing when items such as shopping carts or wheel chairs are moved into and out of the interior chamber. In both of the systems described above, the sanitizing system may use a single sanitizing source such as a UV light source or a combination of sanitizing systems such as a UV light source in combination with a source of disinfecting plasma.

A video output device includes a signal converter for generating a video signal corresponding to displayed video; a projector and a main screen for displaying the video based on the video signal output from the signal converter; left and right lighting units, a left screen, and a right screen disposed in the vicinity of the main screen; and a feature extractor, a left-lighting setting unit, and a right-lighting setting unit for controlling lighting modes of the left and right lighting units based on the content of the displayed video in synchronization with the display timing of the video.

The semiconductor laser of the present invention includes a first conductivity-type cladding layer, a second conductivity-type cladding layer having at least one ridge structure extending in the direction of a resonator, an active layer disposed between the two cladding layers and a current blocking layer provided so as to cover at least a side face of the ridge structure. The current blocking layer includes a hydrogenated first dielectric film. In the structure having the current blocking layer formed of a dielectric, a light confining efficiency is enhanced, a threshold value of laser oscillation decreases, and current properties during the oscillation at a high temperature and with a high power are improved.

At least one controllable source of visible light is configured to illuminate a space to be utilized by one or more occupants. A controller causes the source(s) to emit light in a manner that varies at least one characteristic of visible light emitted into the space over a period of time at least in part in accordance with a chaotic function.

The activation of lights of a mobile communication terminal is controlled with information in music data files, such as SP-MIDI files. The music data files contain note events informating the terminal to play a note of a particular instrument. Light configuration messages are added to the SP-MIDI file. The light configuration messages contain information mapping the activation position, -color and -intensity to the note events. The mobile terminal is provided with an editor application for creating and changing light configuration messages. The light configuration messages can also be created and changed with a light configuration program on a PC. The light configuration messages can be tested on a PC with a MIDI editor program provided with a plug in application for emulating the mobile communication terminal.

A fundus camera is provided with auxiliary optical components and a plurality of projected alignment marks, wherein the alignment marks are in focus and coincident on the iris of the eye when the fundus camera is correctly aligned and the auxiliary optical components allow the alignment marks to be observed as an anterior view in focus, replacing part of the view of the eye fundus which is also in focus in the same view. The auxiliary view optical components may be linked to the focus of the observation system and the associated projected focus indicating marks such that all remain in adequate focus to enable the alignment and focus of the fundus camera to be performed satisfactorily.

A system and a method for using ePaper as a light control media in lighting fixtures or other light enhanced applications to modify, dim or color-shift the light used for lighting the space. One system includes a light source, an ePaper reflector with controllable reflectivity for controlling the light reflected from the reflector and / or an ePaper baffle with controllable translucency for controlling the light through the baffle. The light incident on the ePaper media may include light from other sources such as natural light. One method compares desired lighting in a space to characteristics of the light source. Characteristics of the ePaper media are then adjusted to provide the desired amount of light to the objects under illumination. Reflectivity from walls and furniture may be controlled by applying ePaper to their surfaces. The light source and the ePaper media may be controlled simultaneously to control the lighting.

Both lateral side portions of a laser diode chip separated by the central portions of a p-type capping layer and a p-type clad layer and parallel to the horizontal edges of the cleavage planes of the chip are cut away by etching, so that the p-type capping layer and the p-type clad layer take the shape of a mountain in cleavage planes which are the end faces of an active layer. The cut portions are provided with current restricting layers of oxide film made by baking a liquid oxide film. The thicknesses of the current restricting layers are increased with distance from the central portion of the laser diode chip.

In an embodiment, a unitized overhead glazing system of the present invention includes an array of assembled structural framing cassettes each having at least five photovoltaic modules. In an embodiment, each cassette forms one electrical string and is pre-wired, tested, and shipped ready to install for a variety of applications, including, but not limited to, parking canopies, covered walkways and specialty awnings. The unitized overhead glazing system can be utilized to generate electricity, provide shade, collect water, reduce heat island effect, provide more controlled lighting and support infrastructure for plug-in vehicles. The unitized overhead glazing system is designed to be installed and maintained from below, eliminating safety concerns associated with conventional canopies where work must be performed while on top of the canopy. The unitized overhead glazing system incorporates sealing methods and components to manage water, limit debris build up, and maximize energy yield.

A display device includes a backlight unit, a light guiding plate which is overlappingly arranged on an optical panel, light emitting elements which are arranged on the side surface of the light guiding plate, and a light source driving unit which drives the light emitting elements. The light source driving unit intermittently turns on all of the light emitting elements when displaying a 3D image on the optical panel. In contrast to this, when displaying a 2D image on the optical panel, each light emitting intensity of the light emitting elements in a part of rows is set to be the same as that in a 3D mode, and each light emitting intensity of the light emitting elements in a part of rows other than that is set to be lower than that in the 3D mode.

An edge emitting laser with circular beam using a low-carrier-mobility diluted nitride semiconductor material for an epitaxy light-emitting layer is disclosed. The low-carrier-mobility material can greatly suppress surface recombination of carriers. The epitaxy structure established on the substrate surface includes, from bottom to top, a bottom cladding layer, a bottom waveguide layer, a light-emitting layer, an upper waveguide layer, an upper cladding layer, and an electrode contact layer. The light-emitting layer is formed from a diluted nitride material. Etching is performed from the epitaxy structure through the light-emitting layer, forming a ridge waveguide that has a large reflective index difference between the light-emitting layer and the dielectric passivation layer.

An assembly of LED luminaires is distributed at a sports venue, includes key, back, and fill light sources in such a way as to provide modeling within a significant portion of the playing area of the sports venue, uses beam types narrower than previously used, and achieves efficiencies higher than previously attained, while also reducing glare and spill light.

A semiconductor laser device is constructed by stacking a buffer layer, an undoped GaN layer, an n-GaN contact layer, an n-InGaN crack preventing layer, an n-AlGaN cladding layer, a light emitting layer, a p-AlGaN cladding layer, and a p-GaN contact layer in this order. A ridge portion comprising the p-GaN contact layer and the p-AlGaN cladding layer is formed, and the thickness of the p-AlGaN cladding layer in the ridge portion is less than 0.3 μm.

A housing is located at least partially beneath a rest shelf of a T-bar or other support for ceiling tiles. A spine extends up from the rest shelf. The housing includes an opening with a centerline which extends at least partially laterally. A light source such as an LED within a recess of the housing shines out of the opening along the centerline in an at least partially lateral direction. A diffuser is preferably provided spanning this opening. The housing preferably includes a front wall opposite a rear wall, with the rear wall larger than the front wall and with the opening in the housing extending between lower portions of the rear wall and lower portions of the front wall. Heat transfer fins on an upper surface of the rest shelf and upper end of the spine are preferably provided to assist in heat dissipation.

An image pickup apparatus includes light-emitting means for emitting light to a person as a subject when the subject is photographed, and light emission control means for controlling the amount of light emitted by the light-emitting means. The light emission control means increases the amount of light gradually (either continuously or intermittently) until it reaches a predetermined amount, based on the detection result of the light detection means for detecting light from the subject. The image pickup apparatus can limit the glare of the light emitted by the light-emitting means, thereby projecting the eyes of the subject, and allowing the subject to be properly photographed.

A lighting device includes a light-emitting element, an ultrasonic member, a signal processing unit, a light control unit, an indicator and an indicator control unit. The light-emitting element emits a light. The ultrasonic member emits an ultrasonic signal and receives the ultrasonic signal reflected from an object. The signal processing unit is communicated with the ultrasonic member for converting the reflected ultrasonic signal into a control signal. The light control unit is interconnected between the signal processing unit and the light-emitting element for controlling the light-emitting element to emit light in a selected operating mode in response to the control signal. The indicator control unit is interconnected between the signal processing unit and the indicator for controlling the indicator to assert a notification signal indicative of the operating mode in response to the control signal.

A control device includes a plurality of LED arrays connected in parallel to one another, each of the plurality of LED arrays including one or more LEDs connected in series and a resistance element connected in series to the LEDs, a voltage application circuit that applies a voltage to the plurality of LED arrays, a switching element disposed between the plurality of LED arrays and a ground, a voltage detection circuit having an end connected between the switching element and the plurality of LED arrays, a capacitor having an end connected between the switching element and the plurality of LED arrays, and another end connected to the ground, and a control circuit that controls the voltage outputted from the voltage application circuit and switching of conduction states of the switching element, and reads a voltage from the voltage detection circuit.

PCT No. PCT / NZ96 / 00005 Sec. 371 Date Jan. 30, 1998 Sec. 102(e) Date Jan. 30, 1998 PCT Filed Jan. 31, 1996 PCT Pub. No. WO96 / 28961 PCT Pub. Date Sep. 26, 1996This invention relates to a spot-cultivation system. In particular, it is envisaged that the spot-cultivation system will be most commonly used in situations where a defined area of ground is required to be prepared prior to the planting of individual seedling trees. According to one aspect of the present invention there is provided a spot-cultivation system including an accessory (1) for spot-cultivation, attachment apparatus capable of attaching the accessory to a vehicle, and at least two ground-working devices (4, 5) held in a fixed relationship to each other so that the area of ground worked by the devices is defined by the fixed relationship.

A dual power binocular (13) is provided which can be rapidly switched between a low magnification setting (wider field of view) and a high magnification setting (narrower field of view). Preferably, the switching is performed using a switch (17) mounted on, for example, the bridge (11) of the binocular (13). Each barrel (9) of the binocular includes an adjustable aperture stop. Preferably, the adjustable aperture stop is behind the binocular's objective (19), i.e., on the exepiece (21) side of the objective (19). Most preferably, the adjustable aperture stop is a moveable aperture assembly (31) which restricts light passing through the binocular in the low magnification setting but not in the high magnification setting. Through the use of an adjustable aperture stop, the diameter of the exit pupil and thus the brightness of the imager perceived by the user is substantially the same for the two magnification settings.

A housing is located at least partially beneath a rest shelf of a T-bar or other support for ceiling tiles. A spine extends up from the rest shelf. The housing includes an opening with a centerline which extends at least partially laterally. A light source such as an LED within a recess of the housing shines out of the opening along the centerline in an at least partially lateral direction. A diffuser is preferably provided spanning this opening. The housing preferably includes a front wall opposite a rear wall, with the rear wall larger than the front wall and with the opening in the housing extending between lower portions of the rear wall and lower portions of the front wall. Heat transfer fins on an upper surface of the rest shelf and upper end of the spine are preferably provided to assist in heat dissipation.