Siemens Aktiengesellschaft

Ledon Lighting Jennersdorf Gmbh

Lumitech Produktion Und Entwicklung Gmbh

Ledon Lighting Jeennersdorf Gmbh

Wolfgang Oberleitner

Erwin Baumgartner

Wolfgang Zagler

Krisztian Sasdi

An LED module comprising at least one blue LED and a color conversion layer that is applied thereto and emits a mixed light of the blue light of the LED and the converted spectrum of the color conversion layer. The color conversion layer has at least three different phosphors which at least partially convert the light of the blue LED into red, green, and yellow or yellowish-green light. The phosphor for conversion into red light is a doped nitride compound, preferably a nitridosilicate.

LED comprising a multiband phosphor system

An LED module comprises at least one LED chip emitting monochromatic light having a first spectrum, a platform on which the LED chip is mounted, a reflecting wall that is separate from or integrated into the platform and surrounds the LED chip on all sides, and a dispensed layer applied above the LED chip. The dispensed layer extends in a dome-shaped manner beyond the reflecting wall such that the following equation is satisfied: 0.1*b&#x2266;h&#x2266;0.5*b where h is the height of the dome-shaped dispensed layer, measured from the topmost point of the reflecting wall to the apex of the dome, and b is the diameter of the depression formed by the reflecting wall, measured as the distance from the central axis of the wall.

LED module comprising a dome-shaped color conversion layer

A device for forming a tactilely readable display including Braille characters includes a planar display carrier wherein consisting essentially of a belt of flexible material which forms a closed loop and revolves about two rotating rolls. Circular openings are provided on an outer side of the belt loop, the inner side of the belt being provided with a multiplicity of recesses communicating with respective openings in the outer side of the belt. A steel ball may be lodged in each of the recesses, a portion of each ball protruding through the associated opening to form a spherical raster dot on the outer side of the belt. An upper portion of the belt passes over a contact plate, which forms a reading zone of the Braille display device, while a lower portion of the loop passes through a steel ball container in which all of the recesses become occupied by a respective ball. At a ball selection at an upstream end of the contact plate, as defined by the motion of the belt, an electromagnetically actuated selection device is disposed above the upper end of a guide channel extending downwardly from the selection station to the ball container. The selection device selectively retains steel balls in the recesses of the belt during the passage thereof over the guide channel at the selection station. Unretained steel balls fall back into the container via the guide channel.

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Vienna, Austria

Wolfgang Oberleitner