The disclosure relates to any improved display system unit for holding display panels, photomurals, banners, signs or the like in a variety of sizes. The protector has a base portion and a top portion. In addition, the chip card includes a power voltage selector for selecting a contact bias to supply power to the micro-computer when-ever the contact bias voltage is available since the contact bias voltage is more stable than a contact-less bias voltage. As a result, in the case where the reflective surface of the lamp is viewed from the front, when the point of observation is moved horizontally or vertically, the brightness pattern of the reflective surface changes dynamically to accompany the movement of the point of observation, causing the observer to perceive a strong glittering sensation. The method and apparatus simultaneously hide and move a selected object to a bottom of a UI when the object is encrypted, thereby not visually exposing the encrypted object to a third person, displaying, through the UI the encrypted object on a predetermined screen, directory or folder, and rearranging unselected objects to fill a space created when the selected object is hidden and moved. The sheet can be produced by thermoforming a precursor fiber sheet comprising carbon short fibers of 15 to 30 gm2 in basis weight and a thermosetting resin of 30 to 80 gm2 in basis weight by hot plates having a certain clearance and carbonizing the thermosetting resin contained in thermoformed precursor fiber sheet.