Abstract: An illuminating optical system propagates a coherent light flux from at least one light source into a predetermined optical path to guide the light flux to a screen. A light bulb forms an image to be displayed on the screen on an illumination area illuminated with the light flux that is guided by the illuminating optical system. A projecting optical unit projects the image that is formed on the illumination area onto the screen in a magnifying manner. The illuminating optical system includes a diffusing unit that diffuses the light flux from the light source near a focusing position of the illuminating optical system.

Abstract: In a semiconductor device constituted by a film circuit, a semiconductor element, a reinforcement plate adhered to the film circuit, for surrounding this semiconductor element, and also a heat sink adhered to this reinforcement plate, which are sealed by employing resin, a stray capacitance between power supply terminals (between power supply and ground) is increased so as to increase the noise withstanding characteristic. Both the reinforcement plate and the heat sink own conductivity characteristics, a wiring film on the ground side among wiring films of the film circuit is electrically connected to one of the reinforcement plate and the heat sink, and a wiring film on the power supply side among these wiring films is electrically connected to the other of these reinforcement plate and heat sink. The heat sink is connected to the wiring film via, for instance, a conductive ring.

Abstract: In a semiconductor device constituted by a film circuit, a semiconductor element, a reinforcement plate adhered to the film circuit, for surrounding this semiconductor element, and also a heat sink adhered to this reinforcement plate, which are sealed by employing resin, a stray capacitance between power supply terminals (between power supply and ground) is increased so as to increase the noise withstanding characteristic. Both the reinforcement plate and the heat sink own conductivity characteristics, a wiring film on the ground side among wiring films of the film circuit is electrically connected to one of the reinforcement plate and the heat sink, and a wiring film on the power supply side among these wiring films is electrically connected to the other of these reinforcement plate and heat sink. The heat sink is connected to the wiring film via, for instance, a conductive ring.