Abstract: The invention provides a car-mounted imaging apparatus that renders a frame rate variable and yet does not spoil image quality and does not either invite the drop of sensitivity and deterioration of an S/N ratio. The car-mounted imaging apparatus 1 has two-dimensional imaging means (pixel unit 3, vertical scanning unit 4, horizontal scanning unit 5, output unit 7) having a large number of pixels 2 arranged in a two-dimensional matrix, and pixel information addition means (pixel switch control unit 8) for combining a plurality of pixels 2 and adding and extracting their pixel information. When the number of combination of the pixels 2 is changed, a frame rate becomes variable.

Abstract: The present invention relates to a charging apparatus, comprising a discharging member having a plurality of protrusions and an auxiliary member for assisting discharges by the discharging member. Discharge is made between the discharging member and the auxiliary member upon application of a voltage between the discharging member and the auxiliary member. Where an interval among the distal ends of the plural protrusions of the discharging member is denoted as P and an interval between the discharging member and the auxiliary member is denoted as D, P is equal to or greater than D.

Abstract: A fingerprint identification device judges that the input fingerprint is identical to the fingerprint in the database only when a the touch sensor detects the human finger and a the fingerprint processing unit detects that the input fingerprint is identical to a fingerprint in the database. The touch sensor includes an oscillator that outputs a high frequency signal. An electrode unit applies the high frequency signal to the human finger. A detector unit detects a variation of impedance values varied by the human finger contracting the electrode unit and outputs an output signal based on the variation of impedance values. A discriminator unit determines whether the human finger is in contact with the electrode unit by comparing the output signal from the detector unit with a predetermined reference value.

Abstract: A color image forming apparatus and a image quality control system capable of detecting uneven angular speed of a photoreceptor drum easily and reducing color drift significantly simply by adjusting rotational phase of each image carrier is provided.