Embodiments of an interface unit (100, 200) (eg, a display, a touchpad, a touch screen, etc.) having integrated power harvesting functions are disclosed herein. In a further embodiment, a solar cell (110, 210) or a solar cell matrix within a substrate (10) may be disposed on a first surface (11) and a matrix (120, 220) of interface elements may also be disposed within the substrate (10). are arranged on the first surface (11), so that parts of the solar cell / s (110, 210) laterally surround the individual interface elements (121, 221) or their groups. According to another embodiment, a solar cell (110, 210) or a solar cell array (120, 220) may be disposed within the substrate (10) on a first surface (11), and a matrix of interface elements (120, 220) may be disposed within the substrate Substrate (10) on one of the first surface (11) opposite (ie the solar cell or the solar cell array opposite) lying second surface (12) are arranged. According to yet another embodiment, a matrix of diodes, which may function either as solar cells (110, 210) or as sensor elements, may be disposed within a substrate (10) at a first surface (11) and wired, mode or in one Sensor mode can be operated.
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