| 摘要 |
Provided is a fingerprint triangular prism device having an attached metal sheet, comprising an optical triangular prism (1), a metal sheet (2) and a PCB (3); the metal sheet (2) is attached to the optical triangular prism (1); the metal sheet (2) is provided with a conductive wire (21) or a shielded wire (22), said conductive wire (21) being able to connect to said PCB (3); the metal sheet (2), when conducting electricity, uses the optical triangular prism (1) as a substrate and as a dielectric, and an electrode of the metal sheet (2) is directly connected, by means of the conductive wire (21) or the shielded wire (22), to a DSP on the PCB (3) or to the MCU of the system. The present invention is small in size, has a simple structure, is easy to use and has a low production cost. |
