Patent ID: 9632175
Date: 2017-04-25
CPC Classifications: A01K,G01S

Claim:
1. A fish finder, comprising: a signal processor configured to receive a reception signal generated based on an echo of an ultrasonic wave from a target object, and to generate echo data corresponding to a distance from a transmission source of the ultrasonic wave to the target object every time the ultrasonic wave is transmitted, the ultrasonic wave being transmitted underwater; a display unit having a display screen with a first side and a second side having a length different from the first side, the display screen being turnable around an axis pointing in a direction perpendicular to a planar surface of the display screen, the display unit being configured to display a distance-time image on the display screen based on the echo data; and a controller configured to set a wide or narrow display time range on the display screen according to a turning state of the display screen, and configured to sequentially output in real-time on the display screen the echo data corresponding to the ultrasonic wave, line-feeding the echo data along the display time range that is set according to the turning state of the display screen, wherein the turning state of the display screen is either a horizontally-long screen state that sets the wide display time range on the display screen, or a vertically-long screen state that sets the narrow display time range on the display screen; and the controller is further configured to line-feed echo data along the wide display time range of the horizontally-long screen state at a line-feed rate that is equal to a line-feed rate at which the controller is configured to line-feed echo data along the narrow display time range of the vertically-long screen state, so that echo data resulting from more ultrasonic wave transmissions is displayed at a given time along the wide display time range than echo data that is displayed along the narrow display time range at the given time.