Back to results
US 7,093,371 B2Granted
Direction indicating device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKunihito Takeuchi, Fumitaka Sato
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKunihito Takeuchi, Fumitaka Sato
Estimating the term…
A direction indicating device in which a current display direction is determined in consideration of the historical information of a direction of vehicle specified by a direction specifying unit 1 and a previous display direction, to be specific, in a case where the current direction of vehicle specified by the direction specifying unit 1 agrees with a previous direction of vehicle, the current display direction is changed to agree with the current direction of vehicle, and in a case where the current direction of vehicle specified by the direction specifying unit 1 is different from the previous direction of vehicle, the current display direction is made to agree with the previous display direction.
A direction indicating device comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes: testing, calibrating, or compensating of compasses
Measuring distances, levels or bearings
Term ended 25 Nov 2023 (estimated)
1. Field of the Invention
The present invention relates to a direction indicating device for displaying direction of a vehicle.
2. Description of the Related Art
FIG. 1 is a block diagram to show a direction indicating device in accordance with embodiment 1 of the present invention.
FIG. 2 is a flow chart to show a process flow of the direction indicating device in accordance with the embodiment 1 of the present invention.
FIG. 3 is an explanatory drawing to show directional sections which are divided into 16 equal blocks.
The preferred embodiments of the present invention will be described below.
FIG. 1 is a block diagram to show a direction indicating device in accordance with embodiment 1 of the present invention. In the figure, a direction specifying unit 1 is structured of a geomagnetism detecting block 2, a signal processing block 3, and a direction specifying block 4 and detects geomagnetism to specify a direction of vehicle.
The geomagnetism detecting block 2 is configured of, for example, a geomagnetic sensor and repeatedly detects geomagnetism. The signal processing block 3 is configured of, for example, an operational amplifier, a low pass filter and the like and amplifies the detected data of the geomagnetism detecting block 2 and removes high frequency noises included in the detected data. The direction specifying block 4 is configured of, for example, a microprocessor and the like and calculates a mean value of the detected data output from the signal processing block 3 and specifies a directional section to which the mean value belongs as a direction of the vehicle.