Keyboard, has photo sensors, where signals from photo sensors to computer are different, during interruption of rays on active areas such that active areas are closed by surfaces that reduce pressure in direction perpendicular to rays

摘要

The keyboard has photo sensors (3), where signals from photo sensors to a computer are different, during interruption of light rays (Sg, Sv) on active areas of the keyboard such that active areas of the keyboard are closed by multiple surfaces (4), which are in form of rollers of buttons and made of elastic materials. The surfaces have possibility to reduce pressure in a direction perpendicular to rays.