| 摘要 |
<p>Illuminated Signs An illuminated sign in the form of an elongate unit displays one or more words or other information by light transmitted through a stencil (6) or transparency that within a frame (3) of a casing (2) overlies the display area formed by the front surface (7) of a laminate-panel (8) which with the stencil (6) or transparency is sandwiched between the frame (3) and a backing support (9) of the unit. The display area is illuminated by a line of LEDs along the top of a compartment (5) which houses electronics and batteries, and which nests within a front portion (4) of the casing (2). The LEDs transmit light into the panel (8) through the bottom edge of a transparent-plastics sheet which has a density and consequent light-transmissivity that increases with distance from the LEDs, and which has a rough rear face for refracting light to illuminate the display area through the front face of the sheet. The refracted light is augmented by light reflected back into the sheet through the rear face from reflector sheets.</p> |
