A light-emitting component comprising organic layers and having several layers between a base contact and a cover contact, the corresponding process for its preparation. The projection device comprises a lamp and a cooling device. When the portable industrial computer removed from the loading object, the movable heat dissipation panel closes the aperture to prevent water or dust from entering the interior of the host avoiding damage. Thus, a time-varying sound level is generated by time-varying the number of speaklets emitting clicks. Transverse expansion allows axial gas velocities within the barrel to exceed the local speed of sound as if the gas had passed through a converging diverging nozzle.