Abstract: A plurality of light emitting diode dies (LED) with associated secondary optics, which produce different light distribution patterns, are combined to produce an efficient light source having a desired illumination pattern. By way of example, a first LED may include a lens that produces a light distribution pattern with a maximum intensity at the center while a second LED may use a lens that produces a light distribution pattern with a maximum intensity that surrounds the maximum intensity of the pattern produced by the first LED. The light from the LEDs can then be combined to produce a desired illumination pattern. Additional LEDs and lenses, e.g., having different light distribution patterns may be used if desired. Moreover, a variable current driver may be used to vary the amount of current to the different LEDs, such that the combined illumination pattern may be varied as desired.

Abstract: A flat glass panel 1 for a picture display device of the flat type, is formed by two glass cover plates (3, 5) with at least one glass plate (4, 4', 4", . . . ) between them, and a vitreous frit (8) between the cover plates along the outer edges of the cover plates so as to obtain a box-type glass panel in which a channel structure is present. After heating to the melting temperature of the frit (8), the panel is cooled down to a transitional temperature of the frit, while the space between the cover plates is partly exhausted during the cooling-down phase at a temperature which lies between the melting temperature and the transitional temperature of the frit. Then the temperature is kept constant at approximately the transitional temperature until the frit has become undeformable, said space (13) between the cover plates (3, 5) being fully evacuated then. Finally, cooling-down continues to room temperature, and the space (13) inside the panel is hermetically sealed off.

Abstract: A device is set forth for the treatment of substrates at low temperature, which device is provided with a process chamber (1) in which a holder (2) is arranged which is provided with a support plate (3) having an upper side (4) on which a substrate (5) can be placed, and having a lower side (6) which forms a wall (7) of a cooling chamber (8). The cooling chamber (8) is provided with an inlet (9) comprising a feed opening (10) and an outlet (11, 12) comprising a drain opening (13) through which a cooling liquid can be passed into and from the cooling chamber (8). A first portion (23) of the wall (7) of the cooling chamber (8) formed by the lower side (6) of the support plate (3) projects further into the chamber (8) than does a second portion (20), while the first and the second portion (23, 20, respectively) merge fluently into one another. The drain opening (13) of the outlet (11, 12) of the cooling chamber (8) is positioned adjacent the second portion (20) of the wall (7).