Panel board Patent #: 4056733
ApplicationNo. 06/084384 filed on 10/12/1979
US Classes:345/83, Color340/815.45, Using light emitting diodes340/815.56, Color340/815.75, Light source modifier345/697, Including optical means362/240, Units have common housing362/293, Including selected wavelength modifier (e.g., filter)362/800, LIGHT EMITTING DIODE362/812, SIGNS40/564, Lamp box40/581Colored light
ExaminersPrimary: Trafton, David L.
Attorney, Agent or Firm
International ClassesG09F 13/22 (20060101)
G08G 1/095 (20060101)
G09F 13/04 (20060101)
Foreign Application Priority Data1978-10-17 JP
AbstractA plurality of cellular concave mirror surfaces are formed on a plate-like reflector unit, and a plurality of light-emitting diodes are disposed on these cellular concave mirror surfaces to jointly form a colored light source. Connection wirings to be connected with a power supply source are provided on a substrate laminated with the reflector unit. A lamp base of a conventional type may be coupled to the substrate for being electrically connected to the wirings. This colored light source can provide a single or multiple color displays. Improved shadow pattern display can be provided by forming a complementary color pattern on a front cover lens. Letter, symbol or pattern display can be provided by selectively arranging light-emitting diodes on the reflector unit. In case the above-mentioned light source is used as a traffic signal device, power dissipation and maintenance care are reduced by the light-emitting diodes having low power consumption and long service life, and high security of the traffic is assured by the elimination of false indications caused by external lights.