Abstract: An electric control system for a photoelectric touch input apparatus including a plurality of light-emitting elements arranged to produce a plurality of light beams in parallel on a common plane and a plurality of photosensitive elements opposed to and aligned with the light-emitting elements to receive the light beams so as to produce a plurality of light-receiving signals at each level of the light beams applied thereto.

Abstract: A color video display apparatus for vehicles detects a light or dark condition outside a vehicle to perform a variable gain control on a circuit for amplifying blue, green and red video signals. In response to the dark condition outside the vehicle, the amplification factor of the red video signal is increased relative to those of the blue and green video signals.

Abstract: A photoelectric touch input apparatus comprises a frame placed in front of the display surface of a display device, a plurality of light-emitting elements mounted on the frame in a row along one side of a central opening of the frame to produce a plurality of light beams in parallel spaced relationship, a plurality of photosensitive elements mounted on the frame in a row along the opposite side of the opening and aligned with the light-emitting elements to receive the light beams, a transparent flat plate arranged between the display surface and the light beams and resiliently supported on the frame to be moved toward the display surface by pressure of an object touched thereto, a comparison circuit associated with the photosensitive elements to produce a first output signal indicative of the position of the object when it interrupts one of the light beams, a plurality of switches mounted on the frame and associated with the flat plate to produce a plurality of second output signals therefrom in response to m

Abstract: There is provided a digital acceleration detecting system for rotating bodies comprising a first counter for counting the number of pulse signals corresponding to the rotational speed of a rotating body, a second counter for counting the number of the pulse signals later than the first counter, and a control circuit for generating an output signal corresponding to the difference between the counts of the first and second counters.