Abstract: In a touch panel device comprising a panel main body (4) including a grid array of transmission electrodes (2) and reception electrodes (3) and defining a touch surface (51), the transmission electrodes are connected to a transmission unit (5) for sequentially applying a drive signal to the transmission electrodes. A time constant element is connected to each transmission electrode via the corresponding lead wire to adjust an overall time constant of the transmission electrode, the time constant of each time constant element being selected to be greater as the length of the lead wire for the corresponding transmission electrode increases.

Abstract: In a touch panel device comprising a panel main body (4) including a grid array of transmission electrodes (2) and reception electrodes (3) and defining a touch surface (51), the transmission electrodes are connected to a transmission unit (5) for sequentially applying a drive signal to the transmission electrodes. A time constant element is connected to each transmission electrode via the corresponding lead wire to adjust an overall time constant of the transmission electrode, the time constant of each time constant element being selected to be greater as the length of the lead wire for the corresponding transmission electrode increases.

Abstract: Light-shielding layers are adhered to the lower surface of a glass plate, spaced apart from each other and defining a slit having a width of L. An array of rod lenses is located below the glass plate, such that the optical axes of the lenses pass through the slit. The lower surface of the glass plate is generally covered, and exposed via the slit only. Hence, the leakage of lights reflected from points near a reading position into each photoelectric conversion element is minimized, whereby the element outputs a pixel signal faithfully representing that part of the image which is located at the reading position.