Abstract: The invention relates to a display panel presenting a matrix array constituted by a plurality of light emitting elements. A mask composed of a vertical wall presents a plurality of openings opposite the light emitting elements and a plurality of fins directed towards the display surface and at a distance therefrom. The mask intercepts virtually all the sun's radiation and avoids heating of the display surface due to such radiation.

Abstract: A luminaire used in a room is provided with a brightness effect to avoid giving glare directly to people in the room, to give a desired illuminance on a working surface, and to give a high brightness sensation in the overall room. One or more sparkling regions are provided in which the luminance L (cd/m.sup.2) is in a range of 3.3.ltoreq.log L.ltoreq.-0.3 log w+2.63, when seen from any position in the room between a perpendicular angle of 60 degrees to less than 90 degrees, with the direction immediately beneath the center of the luminaire being 0 degrees. The apparent size of the sparkling region is the solid angle w (steradian (sr)).

Abstract: Disclosed herein is a fluorescent lamp housing assembly capable of providing convection cooling to the lamp and the ballast. The lens of the present invention includes two distinct portions, a central portion and an apertured portion. The housing assembly further includes apertures so that air mass is able to freely move up through the assembly and out ventilation apertures.

Abstract: A displaying apparatus includes a display screen, and a light-shielding grating member having a plurality of light-shielding plates which are assembled in a matrix form in vertical and horizontal directions, the light-shielding grating member being disposed in front of the display screen. In the displaying apparatus, the respective light-shielding plates in the vertical and horizontal directions are inclined in directions to pass a predetermined visual point range when the respective light-shielding plates are virtually extended frontward, or the light-shielding grating member is inclined frontward and backward with respect to the display screen within a predetermined angle range. According to such a structure, external light obliquely injected into the display screen from the left, right, upper and lower sides can be shielded so as to improve a display contrast and visibility to prevent difficulties in seeing the image.

Abstract: An interior or courtesy light for a motor vehicle which provides general diffused light for the passenger compartment and which also provides directed concentrated light in selected areas of the passenger compartment. The lamp includes a fluorescent bulb defining a linear series of light sources and a plurality of louvers positioned beneath the bulb and selectively positioned to deliver concentrated light to selected areas of the passenger compartment. In a first embodiment, the louvers are fixed and are arranged in a first series directing light to the front passenger area and a second series directing light to the driver's area. In a second embodiment, the louvers are movable and may be selectively positioned by an occupant to provide directed concentrated light to a selected area of the passenger compartment.

Abstract: A motor vehicle light, especially a signal light comprises a light source, a reflector, a closure disc for closing the motor vehicle light from outside, a collective lens device arranged between the reflector and the closure disc, a screen device arranged between the collective lens device and the closure disc and having light impermeable regions and light permeable regions. The collective lens device directs light which is reflected from the reflector to the light permeable regions. The screen device is formed reflective at its side facing the closure disc, the screen device at least at its side facing the closure disc being curved concavely.

Abstract: A glare-reducing light source, useful as an automobile headlight featuring a conventional horizontal collimated light beam. The entire collimated light beam is reflected by set of reflective slats. The reflected light is then reflected again by a single reflector onto a second set of reflective slats which directs the light to the desired location in front of the automobile headlights. The headlight is designed so that no light is able to leave the headlight at an angle which will allow light to impinge the eyes of the driver of an oncoming car.

Abstract: A multicolor display lamp used as a display element of a dot-matrix display device. comprises light sources having different emitting colors arranged in four areas of a square case so that their optical axes are parallel to each other, and an optical system arranged frontwardly thereof so as to individually extend emitting rays of the light source.

Abstract: A louver construction comprising a grid formed of cubes molded unitarily with a flange extending around the periphery of the grid. The cubes include a border row making up the periphery of the grid. The cubes in the border row have different dimensions than those inside them in the grid. The flange may vary in width but the outside dimensions of the louver remain the same. As a result, the same size louver grids will fit different size light box openings.

Abstract: A lighting system for a motor vehicle adapted to be mounted in a recess within a front, contoured surface of the motor vehicle and including a light source and reflector means, and a lens assembly. The lens assembly comprises a hollow, enclosed, single piece lens member having a front, clear surface positioned to coincide with the vehicle's front, contoured surface so as to enhance aerodynamic performance of the lighting (and vehicle) system, a rear lensing portion positioned substantially vertically, and side and bottom walls for enclosing the lens member to provide a sealed, dirt-free component.

Abstract: An elongated luminaire is provided having at least one fluorescent lamp and a louver arranged therebelow. The louver consists of lamp-parallel longitudinal reflectors and reflecting cross-oriented lamellae arranged transversely thereto and subsequently of V-shape in cross section. The lamella legs have a parabolic shape in cross section. A light guiding plate is provided extending from one leg of each cross-oriented lamella, extending diagonally upwardly towards and almost adjacent to the lamp. Each light guiding plate substantially overlaps the interspace between neighboring cross-oriented lamella in the vertical projection. Thus, the entire light flux, emerging downwards, is directed, depending on the position of the cross-oriented lamellae and of the light guiding plates, in the desired direction into the lower hemisphere so that it is possible to obtain different light distribution curves of symmetrical or asymmetrical shape with characteristic preferred directions.

Abstract: A warning light assembly suitable for vehicle roof mounting is built around an I-beam structural member and includes lens elements which engage and are readily positionable on the beam so as to span the flanges at both sides thereof. The light assembly may include lights having a wide angle radiation pattern which are comprised of intersecting linear parabolic reflector sections and flash tubes formed to follow the contour of the intersecting linear focal points, the tubes being supports with their axes coincident with the reflector focal points.

Abstract: A recessed lighting fixture used in association with a suspended ceiling system made up of several spaced grid members. The lighting fixture is comprised of a fixture housing having means for supporting at least one fluorescent lamp and includes a relatively thin deflectable top plate which in turn may include a reflecting surface disposed over the fluorescent lamp. Means are provided for securing the fixture housing to the grid members. The louver assembly of the fixture is mounted in a simplified manner and includes a top portion designed to contact the deflectable top plate during insertion and a bottom portion including longitudinally extending sides designed to rest upon and be supported by the spaced grid members. The louver's bottom portions are insertable on the grid members in sequence, first one and then the other, whereby the louver assembly is firmly supported in the fixture housing without the requirement of additional hardware such as springs, latches or the like.

Abstract: In an integrated suspension ceiling it is disclosed in which a fluorescent tube type lighting fixture is supported from an directly over a runner forming a part of the grid of the ceiling system. The runner is provided with a central web and oppositely extending flanges extending from the sides of the web. The web is formed with an opening above which the lighting fixture is supported. The lighting fixture includes a ballast frame separately supported on the runner above the opening, a reflector positioned in the opening below the ballast frame supported directly on the runner and a louver mounted within the opening flush with the plane of the ceiling. Each of the frame, reflector and louver are separately supported and removable from the runner for installation and service. Because the lighting fixture is supported directly on the runner and is removably attached thereto, the lighting fixture can be installed after the grid is installed. The fixture does not provide an interruption in the ceiling system.

Abstract: A signal lamp is disclosed for use in automotive vehicles. The lamp includes a housing, a reflector for producing parallel rays, a lens closing the housing in the direction of light exit and diaphragms mounted behind the lens. The outside of the lens is provided with non-reflecting or weakly reflecting transverse stripes to avoid undesired reflections. In one advantageous embodiment, the diaphragms are positioned only in an upper portion of the lamp.

Abstract: A light source consisting of a straight tube fluorescent lamp is mounted almost in parallel with a desk work surface to be illuminated. A housing enclosing this light source is mounted, and this housing is fixed on the surface to be illuminated by means of two support members. The housing has an opening section at its lower position, and a light controller which is formed of two kinds of prism plates is fitted in the opening. The light emitted from the light source is refracted by the prism plates. These beams of light are converted by the above light controller to two types of light components which run almost in parallel with the first and second directions. One of the beams of light falls from the right top in front of the person at desk to the illuminated surface region in proximity to the left hand of the person at desk, and the other beams of light fall from the left top in front of the person at desk to the illuminated surface region in proximity to the right hand of the person at desk.

Abstract: In a lighting fixture, a light source is partially surrounded by a reflector system mounted in a housing to direct light from the light source out through an aperture in the front of the housing. The reflector is cylindrically and parabolically shaped to provide a cut-off above a selected vertical angle and to provide a decreasing intensity with decreasing vertical angles from a maximum intensity to effect uniform distribution. A lens is provided in the aperture to achieve uniform distribution through a wide horizontal angle. The reflector system and the light source are pivotable within the housing about a fixed horizontal axis to adjust the vertical cut-off angle and the angle of the maximum intensity. A fixed reflector is mounted near the top of the aperture on the front wall of the housing to get more sideways distribution of the light when the light source is pivoted toward the back of the housing.

Abstract: A headlamp has a shell containing a bulb and reflector. The shell has a front opening which is closed by a glass front lens, and a planar plastics protective screen. If the lens should be broken, the screen will normally prevent broken glass and other contaminants from reaching and damaging the reflector.

Abstract: A street lighting luminaire comprising an elongated semi-cylindrical reflector of parabolic cross-section having opposite ends, and paralumens arranged to obtain a luminous beam whose divergent with respect to a plane normal to said axis varies from one to the other end of said reflector to obtain on the street a lightened area of rectangular cross-section.

Abstract: A source of radiant energy is combined with spaced apart reflecting surfaces which are sections of paraboloids of revolution and which have a common focal point but differing focal lengths. Radiant energy is reflected in substantially parallel rays and passed through radiation transmitting means which include radiation controls zones. The reflecting surfaces and the radiation transmitting means are mounted for rotary displacement of one relative to the other to vary the distribution pattern, intensity, color, and other characteristics of the reflected radiant energy in a unique manner. Radiation output from the source of radiant energy may be instantly tailored to a task at hand such as may arise, for example in theatrical lighting, mine lighting, police and surveillance work, military operations, fire fighting, sports activity, illumination of recreational areas and the like.

Abstract: A combined portable spotlight and signal light provided by a narrow beam spotlight and a plurality of colored lenses which disperse the narrow beam into a relatively wide beam which is characteristic of a signal light. Either continuous light or an intermittent flashing light may be switch selected. The lenses include vertically oriented fluted segments to provide a generally horizontal light dispersal and the housing for the light is square to provide numerous mounting positions and provide a distinctive square signal light.

Abstract: A method of altering the photometric output and distribution of a light beam produced by a lamp having a fluted sealed beam lamp lens cover, the light beam having a certain beam shape which, in the absence of the present invention, does not conform to the photometric specifications for auxiliary low beam automobile head lamps; the latter specifications require the lamps to have specific maximum and minimum candela(s) output at various photometric points within the beam pattern.Specific areas of certain flutes molded into the lens cover of a non-conforming sealed beam lamp are partially or totally covered with an opaque material or obstructed by a shield to restrict the candela output of unwanted light at various photometric points within the beam pattern, and thus permit the total beam pattern of the treated lamp to meet state and Federal photometric specifications for auxiliary low beam automobile headlamps.

Abstract: A warning lamp comprising a housing having an annular wall, a bulb having a filament within the confines of the annular wall and a lens closing the end of the annular wall. The lens has a front wall and a peripheral wall surrounding the front wall and telescoped over the annular wall of the housing. A prism is provided on the lens along at least opposed side portions of the peripheral wall of the lens and is constructed and arranged to redirect light from the filament of the bulb in a direction generally at 90.degree. to the axis of the lens.