Laser projection device
AssigneeRobert Bosch GmbH
InventorsAlexander Ehlert, Daniel Kreye, Hendrik Specht
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Abstract
A laser projection device, including at least one reflector unit having at least one reflector element that is configured to deflect at least one laser beam to be projected, and having at least one drive unit that is configured to excite at least the reflector element into resonant vibration. The laser projection device includes at least one temperature compensation unit, which is configured to acquire a vibrational frequency of at least the reflector element and to ascertain the temperature of the reflector unit from it.
Claims11
A laser projection device, comprising:
- at least one reflector unit having at least a reflector element that is configured to deflect at least one laser beam to be projected;
- at least one drive unit that is configured to excite at least the reflector element into resonant vibration;
- and
- at least one temperature compensation unit which is configured to acquire a vibrational frequency of at least the reflector element and to ascertain a temperature of the reflector unit from the acquired vibrational frequency,
- wherein a characteristic curve of a dependence of the vibrational frequency on the temperature of the reflector unit is stored in a storage unit of the temperature compensation unit,
- wherein the temperature of the reflector unit is calculated based on a comparison of the acquired vibrational frequency with the characteristic curve.
A method for operating a laser projection device, the laser projection device including at least one reflector unit including at least one reflector element that is configured to deflect at least one laser beam to be projected, and including at least one drive unit that is configured to excite at least the reflector element into resonant vibration, the method comprising:
- ascertaining a temperature of the reflector unit in light of a vibrational frequency of at least the reflector element,
- wherein the temperature of the reflector unit is calculated based on a comparison of an acquired vibrational frequency with a characteristic curve of a dependence of the vibrational frequency on the temperature of the reflector unit.
A laser projector, comprising:
- at least one laser projection device including at least one reflector unit having at least one reflector element that is configured to deflect at least one laser beam to be projected, at least one drive unit that is configured to excite at least the reflector element into resonant vibration, and at least one temperature compensation unit which is configured to acquire a vibrational frequency of at least the reflector element and to ascertain a temperature of the reflector unit from the acquired vibrational frequency,
- wherein a characteristic curve of a dependence of the vibrational frequency on the temperature of the reflector unit is stored in a storage unit of the temperature compensation unit,
- wherein the temperature of the reflector unit is calculated based on a comparison of the acquired vibrational frequency with the characteristic curve.
Dependencies are inferred from the claim text.