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Related Patent Information
A vehicle has a display device which widens the field of view (visible area) reflected by a side mirror or a back mirror mounted on the vehicle. To enable a driver driving the vehicle to confirm safety even when it is difficult for the driver to visually recognize some of objects surrounding the vehicle, a liquid crystal display device or an EL display device is provided in the side mirror (door mirror), the back mirror (room mirror) or in an interior portion of the vehicle. A camera is mounted on the vehicle and an image from the camera is displayed on the display device. Further, information read from a sensor (distance measuring sensor) having the function of measuring the distance to another vehicle, and a sensor (impact sensor) having the function of sensing an externally applied impact force larger than a predetermined value is displayed on the display device.
A rear view monitoring system for motor vehicles employs three video assemblies, two of which view regions rearwardly at opposite sides of the vehicle, and the third views the region directly rearwardly of the vehicle. Each assembly has an optical lens which gathers light at a particular viewing angle to produce a focused image, and a camera body which converts the image to an electronic signal capable of adjustment and transmission by electrical conductors. The assemblies also have provision for reversing the image to a mirror-image format. The mirror images are of substantially equal magnification and are displayed on screens mounted within the vehicle at positions generally associated with conventional rear view mirrors.
An undistorted view of regions rearward of a vehicle such as a tractor-trailer is provided by a closed circuit television system wherein a television camera having a wide angle viewing capability is positioned at the rear of the vehicle at an effective viewing elevation between about 20% and 70% of the total height of the vehicle. The camera is protected against debilitating factors by a protective enclosure which occupies minimal space and affords secure attachment to said vehicle by virtue of a mounting wherein the axis of said camera lens is horizontally disposed in a plane perpendicular to the longitudinal axis of said vehicle. A mirror associated with said camera lens at a 45 degree angle thereto serves the two-fold purpose of permitting the desired mode of mounting of said enclosure, and reversing the image presented to said camera. The camera is connected by means of electrical wires to a television receiver positioned within easy view of the driver of the vehicle.