| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an information display device capable of giving a sure operation feeling without a push-in stroke, performing a tracing operation and reducing the number of parts around an operation surface and a display surface. SOLUTION: An operation panel 10 is arranged on a liquid crystal display panel 20 and the operation panel 10 is supported by piezoelectric elements E1-E4. When the operation surface 11 of the operation panel 10 is pressurized with a finger, a voltage is generated at both ends of the piezoelectric elements E1-E4 by that, and by detecting it and performing an arithmetic operation, operation force and an operation position are detected. When the operation force larger than a prescribed threshold value is detected, a high frequency is supplied to the piezoelectric elements E1-E4 and thus, the operation surface 11 is vibrated. An operator obtains the sure operation feeling by the vibration. Since the operation force to the operation surface is detected and the vibration is imparted to the operation surface 11 by the common piezoelectric elements E1-E4, the number of the parts is reduced. Also, since the panel is not reacted with the operation force smaller than the prescribed threshold value, the tracing operation is possible.</p> |
