TMDisplay to feature finger shadow touch-screen

by Dhiram Shah

Toshiba Matsushita Display Technology (TMDisplay) announced a low-temperature polysilicon (LTPS) TFT LCD display prototype with finger shadow sensing input capability. This new LTPS TFT LCD prototype, with the ability to sense a user’s finger shadow directly at the surface of the display, is expected to eventually achieve commercial level performance for display screen sizes commonly used in mobile phone applications. The display also allows direct touch on the display surface to select icons or buttons and navigate through pages in the same manner as a conventional touch-screen approach. The finger shadow sensing input display incorporates advanced system-on-glass (SOG) technology to integrate photo sensors and signal processing LSI functions directly onto the glass.

Since the finger shadow sensing input function is integrated directly into the display, without any additional input devices, the result is a thinner, lighter and more compact package with high reliability.
The LTPS TFT LCD prototype is aimed to be used in mobile phone applications. The display has faster switching speeds, greater photo-sensor sensitivity and more precise control of the input signal than conventional displays.