An electroluminescent (EL) ring lamp for illuminating dial indicia, pointers and the like of aircraft instruments is disclosed. The EL ring lamp comprises a flat split-ring arranged in a recess in an adapter plate removably mounted in front of the transparent instrument cover. The ring lamp is formed with microencapsulated phosphor particles applied in a polymeric binder to the illuminating surface of the lamp. In an alternate embodiment, the ring lamp has a frusto-conical illuminating surface.

A display board has a light transmitting substrate illuminated by a light source at the back side, a illuminance adjusting layer having a plurality of light reflective dots and formed on the surface at the front side of the substrate, and a colored light transmitting image layer formed on the illuminance adjusting layer. This display board is manufactured by forming a illuminance adjusting layer and image layer sequentially on the same side of the substrate.

A chart recorder or other instrument has a window 10 within which is a key panel 1 composed of materials which are transparent in normal conditions. Incorporated in or associated with the individual elements of the key panel are display elements 22 applied to the transparent window material 20. The display elements are normally transparent but become visible, for example by fluorescence, when illuminated by radiation transmitted through the body of the transparent window material 20, rendering t...

Lighting casings are provided, the individual panels of which are formed from a plurality of interlocking extruded metal sections. The sections are relatively long and narrow, and include a tongue along one longitudinal edge and a groove along the other. A plurality of individual sections form a composite panel, and the panel may be either planar or curved. The casings provided are economical and simple of construction and yet attractive in appearance.

A light-shielding screen device comprising a first light transmissible substrate, a second light transmissible substrate and an intermediate layer sandwiched therebetween, the intermediate layer comprising at least one light-shielding screen portion located in the middle area of the intermediate layer and a light non-transmissible retaining portion located at least in a portion of the remaining area of the intermediate layer, the portion of the remaining area including the entire outermost perip...

An indicator needle is provided with a base having a groove having a U-shaped cross section, which groove has an opening in an upper surface thereof and extends in a longitudinal direction of the indicator, and a light transmitting lens which plugs the opening of the upper surface of the base. A plurality of light emitting diodes are arranged in the groove of the base. Base ribs each having a triangular cross section and formed integrally with the base so as to cross the groove of the base are p...

A lighting system comprising: an instrument panel having an ashtray and a cigar lighter placed parallel therein in a vehicle width direction; a light emitter; a bulb case extending in the vehicle width direction on a rear surface of the instrument panel above the ashtray and the cigar lighter, and accommodating the light emitter; and a plurality of slits provided in the instrument panel above the ashtray and the cigar lighter, and facing an opening portion of the bulb case, the light emitter bei...

A meter dial illuminating device for illuminating a dial by means of a light incident upon a back surface thereof. The dial is formed of a light transmitting material except at a portion where characters and a scale are indicated. As a result, the front surface of the dial is illuminated by the light incident upon the back surface of the light guiding plate and transmitted therethrough.

Device for illuminating a set (1) of equipment items (3), such as indicators or dials of measurement apparatus (4), which are mounted on an outer face (2E) of a common support (2). According to the invention, this device includes: an electroluminescent plate (5), arranged in such a way that its illuminating face (5I) is opposite said outer face (2E) of said common support (2), spaced away from said outer face, and provided with a plurality of apertures (7); a facing (8) arranged on the non-illum...

An indicator for an appliance includes a light bar formed of molded plastic material. The bar is interconnected to the control elements of the appliance so the periphery of the bar lights whenever any element of the appliance is active. The bar is designed so the periphery of the light bar is exposed along the exterior edge of the appliance.