| 摘要 |
<p>PURPOSE:To prevent a malfunction caused by electric noise in case a key is inputted, by providing newly a shielding transparent electrode on a transparent keyboard. CONSTITUTION:A transparent keyboard part TK is formed by flexible circuit boards 1, 2 which have formed transparent electrodes 1a, 2a consisting of a thin film, on a transparent film, and a spacer 3. Also, a liquid crystal display part LD is formed by upper and lower glass 4, 5, upper and lower polarizing plates 6, 7 and a reflecting plate 8. A liquid crystal display keyboard is constituted by sticking both of these parts TK, LD. In this case, a transparent electrode 1b is provided on the upper face (operating surface) of the circuit board 1. In this way, even if a finger 9 is electrified when a key is operated, no electrostatic induction is caused in the transparent electrodes 1a, 2a for a key signal, and an eletric noise can be prevented.</p> |
