Abstract: An on-vehicle electronic device assembly includes a mount frame fixed on a metallic portion of a vehicle body, a carriable unit removably disposed in the mount frame, and a metallic urging member mounted on the mount frame for urging the carriable unit in a direction of moving the carriable unit away from the mount frame. The carriable unit includes a carrier case having a grounding metal piece insertion hole formed therein in a position corresponding to the urging member, a metallic chassis disposed in the carrier case so as to shield electronic components, and a grounding metal piece loosely fitted into the grounding metal piece insertion hole for electrically connecting the metallic chassis and the urging member.

Abstract: A navigation apparatus for vehicles which comprises a GPS receiver connected to a GPS antenna, a gyro sensor, a vehicle signal processing circuit for processing vehicle signals such as a vehicle speed signal, a CD unit for driving a CD-ROM containing map information, a display unit for displaying a map, and an ECU for controlling the entire operation, wherein at least the CD unit, the display unit and the ECU are disposed within a detachable unit which can be detachably installed in a vehicle.

Abstract: A display control circuit of a display unit is divided such that circuit portions and connecting means susceptible to noise are arranged in the display unit, while circuit portions and connecting means other than the circuit portions and connecting means susceptible to noise are placed away from the display unit through an extension cable. Due to this, the display unit can be made thinner and noises can be prevented from entering the circuit portions and connecting means arranged in the display unit. Further, the display apparatus may have a movement mechanism for making the display unit stand up. In this case, two guide grooves are formed at the sides of an intermediate case of the display unit housing. Due to this, the intermediate case can be made thinner, matching the thickness of the display unit.