A data recorder for vehicle compares a difference between previously acquired data and presently acquired data with a data threshold value which is set to every abnormal occurrence for a time-series data recorded temporarily in RAM, and determines whether the data is recorded in a data recording device, when various types of data associated with the abnormal occurrence is recorded. The system comprises an electrically conductive blade, having first and second blade surfaces. The system and method may write data to the cache memory and associate the data with a cache generation identification. The invention applies to torque converters intended for the automatic transmissions of motor vehicles. An output level data to the display panel is generated according to the repetitive frame number from the contents frame rate detector, the previous level data from the frame memory and an input level data of the input image data.