Display device with combined light guide
AssigneePreh GmbH
InventorsAnton Rüttiger, Jürgen Nauth
Life of this patent
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Abstract
An indicating instrument including a light guiding system having at least a first and second light guides, a sensor disposed at a first end of the first light guide and configured to receive incident ambient light that has traveled through the first light guide, a light-emitting device disposed at a first end of the second light guide and configured to emit light through the second light guide, and a covering body disposed at a second end of the first and second light guides that is opposite to the first ends. Further, the incident ambient light is incident upon the covering body and travels through the first light guide and is received by the sensor, and the light emitted by the light-emitting unit travels through the second light guide and exits the covering body.
Claims19
An indicating instrument, comprising:
- a light guide, which includes two cylindrical rod-shaped light guides, having a sensor and a light-emitting device placed at one end of the light guide, said sensor configured to receive ambient light incident on the other end of the light guide, and said light-emitting device configured to emit light out of the other end of the light guide based on the ambient light detected by the sensor, wherein a central axis of the light guide extends from the one end to the other end, and further wherein a longitudinal side of each of the cylindrical rod-shaped light guides extend substantially parallel to the central axis.
An indicating instrument, comprising:
- a light guiding system having at least first and second light guides;
- wherein the first and second light guides have a first and second central axis, respectively, further wherein the first and second central axis are substantially congruent;
- a sensor disposed at a first end of the first light guide and configured to receive incident ambient light that has traveled through the first light guide;
- a light-emitting device disposed at a first end of the second light guide and configured to emit light through the second light guide;
- wherein the light-emitting device is controlled based on whether or not the sensor detects ambient light;
- and a covering body disposed at a second end of the first and second light guides that is opposite to the first ends.
Dependencies are inferred from the claim text.