Pioneer Electronic Corporation

Sony Corporation

Masayuki Hosoi

Hitoshi Ando

Takashi Kashiwazaki

Atsuhiko Fukushima

A receiving device in which the shielding performance is improved to solve a pulling problem in a receiving device of a direct conversion system is provided. The receiving device includes: a substrate on which an amplifierthat amplifies high frequency input signals, a filterthat passes only intended signals and removes unintended signals by tuning the amplified high frequency input signals and a direct conversion unitthat converts and detects directly the high frequency input signal from the filter; a first high-frequency shielding portionfixed to a substrateand which stands at the boundary between the filter and the other units for preventing radiation of the high frequency electro-magnetic wave that is induced from the filter to the space; and a second high-frequency shielding portionprovided facing and close to the filter surrounded by the first high-frequency shielding portionand which prevents radiation of high frequency electro-magnetic waves induced from the filter to the space, together with the first high-frequency shielding portion

Receiving device and television receiver

A display device applied to a navigation system for a vehicle displaying map information by using a color pallet. The device comprises means for supplying at least a signal distinguishing a bright and a dark environment according to the degree of brightness degree in a passenger compartment of the vehicle. Color pallets have their contents changed according to the information from the supply means. The contents of the registers are changed so that a degree of brightness of background color of a display unit is decreased to less than a decreased degree of brightness of colors displaying the information on the display unit when the output information of the supply means changes from the brightness to the darkness.

Variable-brightness display for use in a navigation system for a vehicle

A momentarily changing position of a travelling vehicle is correctly identified by a vehicular nagivation system on which a magnetism sensor, angular velocity sensor, travel distance sensor and global positioning system are mounted. The current position of the vehicle is identified by, for example, storing data of a road on a map in the form of numerical values, measuring a predetermined distance which the vehicle has travelled and computing the current position on the road based upon the predetermined distance thus measured.

Method for identifying current position of vehicle

A method of recording the travel locus data for an on-board navigation system for motor vehicles stores, at the time of storing data of each location of roads in maps in numberical form, index numbers, which are allotted in sequence to particular locations on the road for each road, together with map numbers each of which is allotted to each map and path numbers each of which is allotted to each road within each map. When the vehicle is running, the map number and the path number are monitored while the present location of the the vehicle is being recognized, and a previous map number, a previous path number and a previous index number are memorized if the present map number is different from the previous map number or the present path number is different from the previous path number. Distinctive point numbers which are allotted to particular locations on the road are also used instead of the path numbers and index numbers. Thus, the amount of data in memorizing the travel locus data is considerably reduced.

Method of memorizing travel locus data for use in an automotive

The invention provides various methods for detecting the bearing of a moving vehicle and of processing data in a vehicular navigation system. Provided there is carried out a process of recognizing the present position of the vehicle while the vehicle is moving at a predetermined speed, bearing data obtained from a prestored map is utilized to determine the present position of the vehicle. At that time, the data output from a terrestrial magnetism sensor, which would otherwise be used, is discarded.

Vehicle bearing detection and data processing methods applicable to

A method for processing data received by a receiving device which outputs present location data for a movable vehicle based on the Global Positioning System and is positioned in the vehicle, including the steps of calculating an average of a predetermined number of data output from the receiving device while the vehicle stops, determining the average to be an effective data if the standard deviation of the data is within a predetermined range, and processing the averaged data as the present location data for the vehicle.

Method and apparatus for processing data in a GPS receiving device in a

A geomagnetic sensor used for vehicle-mount navigational apparatus outputs data indicative of the vehicle's direction. If the output data from the geomagnetic sensor is out of a predetermined range, the data is replaced by predetermined data or corrected on the basis of the predetermined data.

Method of processing output data from geomagnetic sensor

A method for displaying a map, including steps of evaluating a start dot and an end dot of each segment defining a boundary of a predetermined area on the map, storing sequentially each of the evaluated data so that each of the segments has a lateral deflection with respect to the predetermined area, determining the lateral deflection of the predetermined area according to the evaluated data for the start and end dots of the segment when the predetermined area is painted on a display unit, calculating a start point for painting positioned inward of the segment and each of the evaluated data, and painting the predetermined area with a predetermined color from the start point.

Growing community of inventors

Saitama, Japan

Masayuki Hosoi