LIGHT-EMITTING DIODE UNIT Russian patent published in 1999 - IPC

FIELD: power engineering; pilot lights for motor, railway, sea-going, and other vehicles. SUBSTANCE: unit has light emitter with one or more chips emitting monochromatic or heterochromatic light within optical range, emitter holder incorporating metal or metallized heat-transfer substrate with connecting leads, sealing case with cover made in the form of converging lens; guide pins are provided on bottom face of cover base which are arranged to fit position holes in substrate; the latter has axial depression with flat bottom to mount light emitting chips and light reflecting side surface; space between light emitter substrate depression and lens-shaped cover is filled with sealing compound; point of connection of each insulated lead to respective conductor is covered with conducting adhesive; flat annular lens made of optically transparent thermoplastic material with annular raster-cone optical surface and angles of inclination of generating lines to optical axis between 1.5 and 86 deg. is used as converging lens. EFFECT: improved emissive power, variable angle of vision, improved uniformity of energy distribution within light flux, reduced size and mass of unit. 2 cl, 2 dwg