| 摘要 |
An illumination device (1) for coupling to an electrical energy source includes a circuit board (5) that defines opposite first and second outer surfaces (13, 26) of a predetermined area size within an outer perimeter (11) of the circuit board (5). A plurality of electroluminescent semiconductors (15) each with a light emitting side and an electrical connection side are electrically connected to the circuit board (5) and distributed over the first outer surface (13) in a first pattern with their light emitting sides exposed. A first plate (7) is positioned to overlie the first outer surface (13) of the circuit board (5), and a first intermediate bonding layer (23; 25) of thermoplastic material is interposed between the circuit board (5) and the first plate (7). A second plate (9) is positioned to overlie the second outer surface (26) of the circuit board (5), and a second intermediate bonding layer (27) of thermoplastic material is interposed between the circuit board (5) and the second plate (9). The first and second plates (7, 9) and the first and second intermediate bonding layers (23; 25, 27) each have a surface area larger than the predetermined area size to extend beyond the outer perimeter (11) of the circuit board. At least the first plate (7) and the first intermediate bonding layer (23; 25) are each translucent or transparent. The circuit board (5) has a plurality of apertures (21) distributed in a second pattern commensurate with the first pattern, so as to avoid interference and allow uniting of the first and second intermediate bonding layers (23; 25, 27) through the plurality of apertures (21). |
