| 摘要 |
An operator element having freely programmable symbols, which includes a keycap, a display unit arranged at a distance and behind the keycap in a housing of the operator element, whereby the display unit interacts with a light-guiding element so that symbols are projected onto the keycap, and a diffusion layer attached to an inner face or outer face of a top part of the keycap. Further, the display unit is self-illuminating or is a transmissive, a reflecting, or is a self-illuminating display unit that is transilluminated and/or illuminated directly by a light source or via an optical system. In addition, the keycap is made of a black-transparent material.
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