Tactile Touch Display Using Segmented-Electrode Array with Tactile Strength Stabilization

We developed an 8.4-inch electrostatic-tactile touch display using a segmented-electrode array (30 × 20) as both tactile pixels and touch sensors. Each pixel can be excited independently so that the electrostatic-tactile touch display allows presenting real localized tactile textures in any shape. A driving scheme in which the tactile strength is independent of the grounding state of the human body by employing twophased actuation was also proposed and demonstrated. Furthermore, tactile crosstalk was investigated to find it was due to the voltage fluctuation in the human body and it was diminished by applying the aforementioned driving scheme. key words: electrostatic tactile display, electrostatic force, touch sensor, human body, tactile crosstalk, localized tactile texture